WO2021018272A1 - 一种充放电保护电路、终端设备及电池放电控制方法 - Google Patents
一种充放电保护电路、终端设备及电池放电控制方法 Download PDFInfo
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- WO2021018272A1 WO2021018272A1 PCT/CN2020/106094 CN2020106094W WO2021018272A1 WO 2021018272 A1 WO2021018272 A1 WO 2021018272A1 CN 2020106094 W CN2020106094 W CN 2020106094W WO 2021018272 A1 WO2021018272 A1 WO 2021018272A1
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- battery
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/374—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with means for correcting the measurement for temperature or ageing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
- H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- This application relates to the technical field of battery management, and in particular to a charging and discharging protection circuit, terminal equipment, and a battery discharge control method.
- the performance of the battery is stable and reliable, it can supply power stably for a long time, and the battery structure is simple, the charging and discharging operation is simple and easy, and it is widely used in various portable terminal devices, such as mobile phones, tablet computers, cameras, and notebook computers.
- the output voltage of the battery will gradually decrease.
- the battery is usually connected to a charging and discharging protection circuit in practical applications.
- the charging and discharging protection circuit usually has an under-voltage protection (over-discharge protection) function. When the battery output voltage is less than the set under-voltage protection When the threshold is reached, disconnect the battery discharge circuit.
- the under-voltage protection function of the charging and discharging protection circuit connected to the battery may fail. Therefore, in order to further improve the safety and life of the battery, a discharge cut-off voltage is also set in the terminal device.
- a discharge cut-off voltage is also set in the terminal device.
- the current under-voltage protection threshold and discharge cut-off voltage of the battery are set based on the performance of the battery at room temperature. Compared with the battery capacity when the output voltage of the battery reaches the discharge cut-off voltage at room temperature, when the battery is working in a low temperature environment, when the battery output voltage reaches the battery discharge cut-off voltage set at room temperature, the battery has more However, the electrical load connected to the battery cannot continue to obtain power from the battery, resulting in that the battery’s power cannot be effectively used.
- the present application provides a charging and discharging protection circuit, terminal equipment and a battery discharge control method to solve the problem that the battery power cannot be effectively used in a low temperature environment.
- this application provides a charge-discharge protection circuit.
- the charge-discharge protection circuit includes a power terminal, a ground terminal, and an undervoltage protection threshold control terminal.
- the power terminal is used to connect to the positive electrode of the battery, and the ground terminal is used to connect to the battery.
- the negative pole, the undervoltage protection threshold control terminal is used to receive the first control signal.
- the charge and discharge protection circuit is used to reduce the undervoltage protection threshold of the battery under the control of the first control signal when the temperature of the battery is less than the set temperature threshold and the discharge current of the battery is greater than the set current threshold.
- the charge and discharge protection circuit reduces the undervoltage protection threshold of the battery so that the battery can continue to discharge until the battery's The output voltage is less than the reduced under-voltage protection threshold, so that before the under-voltage protection threshold of the battery is adjusted, the unusable power in the battery due to low temperature can be released, and the electrical load connected by the charge and discharge protection circuit use.
- the under-voltage protection threshold control terminal is also used to receive a second control signal
- the charge-discharge protection circuit is also used to: when the output voltage of the battery is less than the discharge cut-off voltage of the battery, control the second control signal Increase the under-voltage protection threshold of the battery.
- the under-voltage protection threshold to prevent damage to the battery, to ensure the service life and safety of the battery. If the under-voltage protection threshold of the battery is not increased, the battery may be damaged in scenarios where it cannot be charged in time.
- the charge and discharge protection circuit further includes a discharge control terminal, and the discharge control terminal is used to output a third control signal.
- the charge-discharge protection circuit is also used to compare the output voltage of the battery with the under-voltage protection threshold of the battery, and output a third control signal according to the comparison result.
- the third control signal is used to control the discharging circuit of the battery to be turned on or off.
- the third control signal when the output voltage of the battery is greater than the under-voltage protection threshold of the battery, the third control signal is used to control the discharging circuit of the battery to turn on; when the output voltage of the battery is less than the under-voltage protection threshold of the battery, the third control signal is used to The discharge circuit of the control battery is disconnected, and undervoltage protection is performed.
- the charge and discharge protection circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator, and the battery sampling circuit is respectively connected to the power terminal, the ground terminal, the undervoltage protection threshold control terminal, and the first input terminal of the comparator.
- the reference voltage circuit is connected with the second input terminal of the comparator, and the output terminal of the comparator is connected with the discharge control terminal.
- the battery voltage sampling circuit is used to sample the output voltage of the battery and increase the sampling voltage under the control of the first control signal; the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery; the comparator, It is used to compare the output voltage of the reference voltage circuit with the increased sampling voltage, and generate and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first voltage dividing resistor, a second voltage dividing resistor, and a switch resistor array.
- the switch resistor array includes a plurality of branches connected in parallel, and each branch includes a third voltage dividing resistor. And a switch connected in series with the third voltage divider resistor. Wherein, the first end of the first voltage dividing resistor is respectively connected to the power supply terminal and the first end of the switch resistor array, and the second end of the first voltage dividing resistor is respectively connected to the first end of the second voltage dividing resistor and the switch resistor array.
- the second terminal is connected to the first input terminal of the comparator, the control terminal of the switch in the switch resistor array is connected to the undervoltage protection threshold control terminal, and the second terminal of the second voltage divider resistor is connected to the ground terminal; the first control signal is used for At least one switch in the switch resistance array is controlled to switch from an off state to an on state.
- the reference voltage circuit is a voltage source.
- the charge-discharge protection circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator.
- the battery sampling circuit is connected to the power supply terminal, the ground terminal, and the first input terminal of the comparator, and the reference voltage circuit is connected to the comparator.
- the second input terminal of the device is connected to the undervoltage protection threshold control terminal.
- the battery voltage sampling circuit is used to sample the output voltage of the battery;
- the reference voltage circuit is used to reduce the output voltage of the reference voltage circuit under the control of the first control signal, and the output voltage of the reference voltage circuit is used to characterize The under-voltage protection threshold of the battery;
- a comparator used to compare the output voltage of the battery voltage sampling circuit with the output voltage of the reference voltage circuit, and output a third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first sampling resistor and a second sampling resistor; wherein, the first end of the first voltage dividing resistor is connected to the power source, and the second end of the first voltage dividing resistor is connected to the first The first end of the two voltage dividing resistor is connected to the first input end of the comparator, and the second end of the second voltage dividing resistor is connected to the ground terminal.
- the reference voltage circuit includes a plurality of parallel branches, and each branch includes a voltage source and a switch connected in series with the voltage source.
- the first terminal of the reference voltage circuit is grounded, the second terminal of the reference voltage circuit is connected to the second input terminal of the comparator, and the control terminal of the switch in the reference voltage circuit is connected to the undervoltage protection threshold control terminal; the first control signal It is used to control the first switch in the reference voltage circuit to switch from the on state to the off state, and to control the second switch in the reference voltage circuit to switch from the off state to the on state, and the voltage of the voltage source connected in series with the first switch is greater than The voltage of the voltage source connected in series with the second switch.
- this application provides a terminal device.
- the terminal device includes a processor and a charge-discharge protection circuit.
- the charge-discharge protection circuit includes a power terminal, a ground terminal, and an undervoltage protection threshold control terminal.
- the power terminal is used to connect to the battery.
- the positive terminal and the ground terminal are used to connect the negative terminal of the battery, and the under-voltage protection threshold control terminal is connected to the processor.
- the processor is used to reduce the discharge cut-off voltage of the battery and send the first control signal when the temperature of the battery is less than the set temperature threshold and the discharge current of the battery is greater than the set current threshold;
- the charge and discharge protection circuit It is used to receive the first control signal through the under-voltage protection threshold control terminal, and under the control of the first control signal, reduce the under-voltage protection threshold of the battery.
- the terminal device when the temperature of the battery is less than the set temperature threshold and the discharge current of the battery is greater than the set current threshold, the terminal device reduces the undervoltage protection threshold of the battery and the discharge cut-off voltage of the battery, so that the battery can continue to discharge , Until the output voltage of the battery is less than the reduced under-voltage protection threshold, so that the unusable power in the battery due to low temperature can be released before the under-voltage protection threshold of the battery is adjusted, so that the terminal device can continue Work to improve the endurance of terminal equipment.
- the processor is also used to: when the output voltage of the battery is less than the discharge cut-off voltage of the battery, control the terminal device to shut down, increase the discharge cut-off voltage of the battery, and send a second control signal; the charge and discharge protection circuit also Used to: increase the undervoltage protection threshold of the battery under the control of the second control signal.
- the terminal device After the terminal device is shut down, it will consume the power in the battery.
- the under-voltage protection threshold and the discharge cut-off voltage of the battery are increased, which can prevent the battery from being damaged, and ensure the service life and safety of the battery. If the under-voltage protection threshold of the battery and the discharge cut-off voltage of the battery are not increased, the battery may be damaged in scenarios that cannot be charged in time.
- the charge and discharge protection circuit further includes a discharge control terminal.
- the charge-discharge protection circuit is also used to compare the output voltage of the battery with the under-voltage protection threshold of the battery, and output a third control signal through the discharge control terminal according to the comparison result.
- the third control signal is used to control the discharge circuit of the battery to turn on or disconnect.
- the third control signal is used to control the discharging circuit of the battery to turn on; when the output voltage of the battery is less than the under-voltage protection threshold of the battery, the third control signal is used to The discharge circuit of the control battery is disconnected, and undervoltage protection is performed.
- the charge and discharge protection circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator, and the battery sampling circuit is respectively connected to the power terminal, the ground terminal, the undervoltage protection threshold control terminal, and the first input terminal of the comparator.
- the reference voltage circuit is connected with the second input terminal of the comparator, and the output terminal of the comparator is connected with the discharge control terminal.
- the battery voltage sampling circuit is used to sample the output voltage of the battery and increase the sampling voltage under the control of the first control signal; the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery; the comparator, It is used to compare the output voltage of the reference voltage circuit with the increased sampling voltage, and output a third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first voltage dividing resistor, a second voltage dividing resistor, and a switch resistor array.
- the switch resistor array includes a plurality of branches connected in parallel, and each branch includes a third voltage dividing resistor. And a switch connected in series with the third voltage divider resistor. Wherein, the first end of the first voltage dividing resistor is respectively connected to the power supply terminal and the first end of the switch resistor array, and the second end of the first voltage dividing resistor is respectively connected to the first end of the second voltage dividing resistor and the switch resistor array.
- the second terminal is connected to the first input terminal of the comparator, the control terminal of the switch in the switch resistor array is connected to the undervoltage protection threshold control terminal, and the second terminal of the second voltage divider resistor is connected to the ground terminal; the first control signal is used for At least one switch in the switch resistance array is controlled to switch from the off state to the on state.
- the reference voltage circuit is a voltage source.
- the charge-discharge protection circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator.
- the battery sampling circuit is connected to the power supply terminal, the ground terminal, and the first input terminal of the comparator, and the reference voltage circuit is connected to the comparator.
- the second input terminal of the comparator is connected with the undervoltage protection threshold control terminal, and the output terminal of the comparator is connected with the discharge control terminal.
- the battery voltage sampling circuit is used to sample the battery voltage;
- the reference voltage circuit is used to reduce the output voltage of the reference voltage circuit under the control of the first control signal, and the output voltage of the reference voltage circuit is used to characterize the battery The under-voltage protection threshold;
- a comparator used to compare the output voltage of the battery voltage sampling circuit with the output voltage of the reference voltage circuit, and output a third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first sampling resistor and a second sampling resistor.
- the first terminal of the first voltage dividing resistor is connected to the power terminal
- the second terminal of the first voltage dividing resistor is respectively connected to the first terminal of the second voltage dividing resistor and the first input terminal of the comparator.
- the second end of the resistor is connected to the ground end.
- the reference voltage circuit includes a plurality of parallel branches, and each branch includes a voltage source and a switch connected in series with the voltage source.
- the first terminal of the reference voltage circuit is grounded, the second terminal of the reference voltage circuit is connected to the second input terminal of the comparator, and the control terminal of the switch in the reference voltage circuit is connected to the undervoltage protection threshold control terminal; the first control The signal is used to control the first switch in the reference voltage circuit to switch from the on state to the off state, to control the second switch in the reference voltage circuit to switch from the off state to the on state, and the voltage of the voltage source connected in series to the first switch Greater than the voltage of the voltage source connected in series with the second switch.
- this application also provides a charge-discharge protection circuit.
- the charge-discharge protection circuit includes a power terminal, a ground terminal, a temperature sampling terminal, a current sampling terminal, a controller, and an undervoltage protection control circuit.
- the power terminal is used to connect The positive terminal of the battery and the ground terminal are used to connect the negative terminal of the battery, and the controller is respectively connected with the undervoltage protection control circuit, the temperature sampling terminal and the current sampling terminal.
- the controller is used to obtain the temperature of the battery through the temperature sampling terminal, and the discharge current of the battery through the current sampling terminal; when the temperature of the battery is less than the set temperature threshold, and the discharge current of the battery is greater than the set current threshold, Send a first control signal; an under-voltage protection control circuit for reducing the under-voltage protection threshold of the battery under the control of the first control signal.
- the charge and discharge protection circuit reduces the undervoltage protection threshold of the battery so that the battery can continue to discharge until the battery's The output voltage is less than the reduced under-voltage protection threshold, so that the unusable power in the battery due to low temperature can be released before the under-voltage protection threshold of the battery is adjusted, and the electric load connected by the charge and discharge protection circuit use.
- the controller is further used to send a second control signal when the output voltage of the battery is less than the discharge cut-off voltage of the battery; the undervoltage protection control circuit is also used to: under the control of the second control signal, Increase the under-voltage protection threshold of the battery.
- the under-voltage protection threshold to prevent damage to the battery, to ensure the service life and safety of the battery. If the under-voltage protection threshold of the battery is not increased, the battery may be damaged in scenarios where it cannot be charged in time.
- the charge-discharge protection circuit further includes a discharge control terminal, and the discharge control terminal is connected to the undervoltage protection control circuit.
- the under-voltage protection control circuit is also used to compare the output voltage of the battery with the under-voltage protection threshold of the battery, and output a third control signal through the discharge control terminal according to the comparison result, and the third control signal is used to control the discharge circuit of the battery to conduct Or disconnect.
- the third control signal when the output voltage of the battery is greater than the under-voltage protection threshold of the battery, the third control signal is used to control the discharging circuit of the battery to turn on; when the output voltage of the battery is less than the under-voltage protection threshold of the battery, the third control signal is used to The discharge circuit of the control battery is disconnected, and undervoltage protection is performed.
- the undervoltage protection control circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator.
- the battery sampling circuit is connected to the power supply terminal, the ground terminal, the undervoltage protection threshold control terminal, and the first input terminal of the comparator.
- the reference voltage circuit is connected with the second input terminal of the comparator, and the output terminal of the comparator is connected with the discharge control terminal.
- the battery voltage sampling circuit is used to sample the output voltage of the battery and increase the sampling voltage under the control of the first control signal; the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery; the comparator, It is used to compare the output voltage of the reference voltage circuit with the increased sampling voltage, and output a third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first voltage dividing resistor, a second voltage dividing resistor, and a switch resistor array.
- the switch resistor array includes a plurality of branches connected in parallel, and each branch includes a third voltage dividing resistor. And a switch connected in series with the third voltage divider resistor. Wherein, the first end of the first voltage dividing resistor is respectively connected to the power supply terminal and the first end of the switch resistor array, and the second end of the first voltage dividing resistor is respectively connected to the first end of the second voltage dividing resistor and the switch resistor array.
- the second terminal of the resistor is connected to the first input terminal of the comparator, the control terminal of the switch in the switch resistor array is connected to the undervoltage protection threshold control terminal, and the second terminal of the second voltage divider resistor is connected to the ground terminal; the first control signal is used for At least one switch in the switch resistance array is controlled to switch from the off state to the on state.
- the reference voltage circuit is a voltage source.
- the undervoltage protection control circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator.
- the battery sampling circuit is connected to the power supply terminal, the ground terminal, and the first input terminal of the comparator, and the reference voltage circuit is connected to The second input terminal of the comparator and the undervoltage protection threshold control terminal are connected.
- the battery voltage sampling circuit is used to sample the output voltage of the battery; the reference voltage circuit is used to reduce the output voltage of the reference voltage circuit under the control of the first control signal; the output voltage of the reference voltage circuit is used to characterize The under-voltage protection threshold of the battery; a comparator, used to compare the output voltage of the reference voltage circuit with the output voltage of the battery voltage sampling circuit, and output a third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first sampling resistor and a second sampling resistor.
- the first terminal of the first voltage dividing resistor is connected to the power terminal
- the second terminal of the first voltage dividing resistor is respectively connected to the first terminal of the second voltage dividing resistor and the first input terminal of the comparator.
- the second end of the resistor is connected to the ground end.
- the reference voltage circuit includes a plurality of parallel branches, and each branch includes a voltage source and a switch connected in series with the voltage source.
- the first terminal of the reference voltage circuit is grounded, the second terminal of the reference voltage circuit is connected to the second input terminal of the comparator, and the control terminal of the switch in the reference voltage circuit is connected to the undervoltage protection threshold control terminal; the first control signal It is used to control the first switch in the reference voltage circuit to switch from the on state to the off state, and to control the second switch in the reference voltage circuit to switch from the off state to the on state, and the voltage of the voltage source connected in series with the first switch is greater than The voltage of the voltage source connected in series with the second switch.
- the present application also provides a terminal device, which includes a processor and a charging and discharging protection circuit.
- the processor is used to reduce the discharge cut-off voltage of the battery when the temperature of the battery connected to the charge and discharge protection circuit is less than the set temperature threshold, and the discharge current of the battery is greater than the set current threshold;
- the charge and discharge protection circuit It is used to reduce the under-voltage protection threshold of the battery when the temperature of the battery is less than the set temperature threshold and the discharge current of the battery is greater than the set current threshold.
- the terminal device when the temperature of the battery is less than the set temperature threshold and the discharge current of the battery is greater than the set current threshold, the terminal device reduces the undervoltage protection threshold of the battery and the discharge cut-off voltage of the battery, so that the battery can continue to discharge , Until the output voltage of the battery is less than the reduced under-voltage protection threshold, so that the unusable power in the battery due to low temperature can be released before the under-voltage protection threshold of the battery is adjusted, so that the terminal device can continue Work to improve the endurance of terminal equipment.
- the processor is also used to: when the output voltage of the battery is less than the discharge cut-off voltage of the battery, control the terminal device to shut down and increase the discharge cut-off voltage of the battery; the charge and discharge protection circuit is also used to: The output voltage is less than the discharge cut-off voltage of the battery. After the terminal device is shut down, the under-voltage protection threshold of the battery is increased.
- the terminal device After the terminal device is shut down, it will consume the power in the battery.
- the under-voltage protection threshold and the discharge cut-off voltage of the battery are increased, which can prevent the battery from being damaged, and ensure the service life and safety of the battery. If the under-voltage protection threshold of the battery and the discharge cut-off voltage of the battery are not increased, the battery may be damaged in scenarios that cannot be charged in time.
- the charge and discharge protection circuit includes a power terminal, a ground terminal, a temperature sampling terminal, a current sampling terminal, a controller, and an undervoltage protection control circuit.
- the power terminal is used to connect the positive terminal of the battery, and the ground terminal is used to connect the battery.
- the controller is connected to the undervoltage protection control circuit, the temperature sampling terminal and the current sampling terminal respectively.
- the controller is used to obtain the temperature of the battery through the temperature sampling terminal, and the discharge current of the battery through the current sampling terminal; when the temperature of the battery is less than the set temperature threshold, and the discharge current of the battery is greater than the set current threshold, Send a first control signal; an under-voltage protection control circuit for reducing the under-voltage protection threshold of the battery under the control of the first control signal.
- the charge and discharge protection circuit further includes a discharge control terminal.
- the under-voltage protection control circuit is also used to compare the output voltage of the battery with the under-voltage protection threshold of the battery, and output a third control signal through the discharge control terminal according to the comparison result.
- the third control signal is used to control the on or off of the battery discharge circuit open.
- the undervoltage protection control circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator.
- the battery sampling circuit is connected to the power supply terminal, the ground terminal, the undervoltage protection threshold control terminal, and the first input terminal of the comparator.
- the reference voltage circuit is connected to the second input terminal of the comparator, and the output terminal of the comparator is connected to the discharge control terminal.
- the battery voltage sampling circuit is used to sample the output voltage of the battery and increase the sampling voltage under the control of the first control signal; the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery; the comparator, It is used to compare the output voltage of the reference voltage circuit with the increased sampling voltage, and output a third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first voltage dividing resistor, a second voltage dividing resistor, and a switch resistor array.
- the switch resistor array includes a plurality of branches connected in parallel, and each branch includes a third voltage dividing resistor. And a switch connected in series with the third voltage divider resistor. Wherein, the first end of the first voltage dividing resistor is respectively connected to the power supply terminal and the first end of the switch resistor array, and the second end of the first voltage dividing resistor is respectively connected to the first end of the second voltage dividing resistor and the switch resistor array.
- the second terminal is connected to the first input terminal of the comparator, the control terminal of the switch in the switch resistor array is connected to the undervoltage protection threshold control terminal, and the second terminal of the second voltage divider resistor is connected to the ground terminal; the first control signal is used for At least one switch in the switch resistance array is controlled to switch from an off state to an on state.
- the reference voltage circuit is a voltage source.
- the undervoltage protection control circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator.
- the battery sampling circuit is connected to the power supply terminal, the ground terminal, and the first input terminal of the comparator, and the reference voltage circuit is connected to The second input terminal of the comparator and the undervoltage protection threshold control terminal are connected, and the output terminal of the comparator is connected with the discharge control terminal.
- the battery voltage sampling circuit is used to sample the battery voltage;
- the reference voltage circuit is used to reduce the output voltage of the reference voltage circuit under the control of the first control signal, and the output voltage of the reference voltage circuit is used to characterize the battery The under-voltage protection threshold;
- a comparator used to compare the output voltage of the reference voltage circuit with the output voltage of the battery voltage sampling circuit, and output a third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first sampling resistor and a second sampling resistor; wherein, the first end of the first voltage dividing resistor is connected to the power source, and the second end of the first voltage dividing resistor is connected to the first The first end of the two voltage dividing resistor is connected to the first input end of the comparator, and the second end of the second voltage dividing resistor is connected to the ground terminal.
- the reference voltage circuit includes a plurality of parallel branches, and each branch includes a voltage source and a switch connected in series with the voltage source.
- the first terminal of the reference voltage circuit is grounded, the second terminal of the reference voltage circuit is connected to the second input terminal of the comparator, and the control terminal of the switch in the reference voltage circuit is connected to the undervoltage protection threshold control terminal; the first control signal It is used to control the first switch in the reference voltage circuit to switch from the on state to the off state, and to control the second switch in the reference voltage circuit to switch from the off state to the on state, and the voltage of the voltage source connected in series with the first switch is greater than The voltage of the voltage source connected in series with the second switch.
- the present application also provides a battery discharge control method.
- the method includes: the terminal device detects the temperature of the battery in the terminal device and the discharge current of the battery, and when the temperature of the battery is less than a set temperature threshold, and the battery is discharged When the current is greater than the set current threshold, reduce the battery's under-voltage protection threshold and the battery's discharge cut-off voltage.
- the terminal device when the temperature of the battery is less than the set temperature threshold and the discharge current of the battery is greater than the set current threshold, the terminal device reduces the undervoltage protection threshold of the battery and the discharge cut-off voltage of the battery, so that the battery can continue to discharge , Until the output voltage of the battery is less than the reduced under-voltage protection threshold, so that the unusable power in the battery due to low temperature can be released before the under-voltage protection threshold of the battery is adjusted, so that the terminal device can continue Work to improve the endurance of terminal equipment.
- the terminal device controls the terminal device to shut down and increase the undervoltage protection threshold of the battery and the discharge cut-off voltage of the battery.
- the terminal device After the terminal device is shut down, it will consume the power in the battery.
- the under-voltage protection threshold and the discharge cut-off voltage of the battery are increased, which can prevent the battery from being damaged, and ensure the service life and safety of the battery. If the under-voltage protection threshold of the battery and the discharge cut-off voltage of the battery are not increased, the battery may be damaged in scenarios that cannot be charged in time.
- the terminal device also compares the output voltage of the battery with the undervoltage protection threshold of the battery, and controls the discharge loop of the battery to be turned on or off according to the comparison result. Among them, when the output voltage of the battery is greater than the under-voltage protection threshold of the battery, the terminal device controls the battery's discharge circuit to turn on; when the battery output voltage is less than the battery's under-voltage protection threshold, the terminal device controls the battery's discharge circuit to disconnect. Perform undervoltage protection.
- the present application also provides a battery discharge control method.
- the method includes: the temperature of the battery connected to the charging protection circuit by the charge and discharge protection circuit is less than a set temperature threshold, and the discharge current of the battery is greater than the set current When the threshold is set, the first control signal is received, and under the control of the first control signal, the undervoltage protection threshold of the battery is reduced.
- the battery under-voltage protection threshold is reduced so that the battery can continue to discharge until the battery's The output voltage is less than the reduced under-voltage protection threshold, so that the unusable power in the battery due to low temperature can be released before the under-voltage protection threshold of the battery is adjusted, and the electric load connected by the charge and discharge protection circuit use.
- the charge-discharge protection circuit when the output voltage of the battery is lower than the discharge cut-off voltage of the battery, the charge-discharge protection circuit further receives a second control signal, and under the control of the second control signal, increases the under-voltage protection threshold of the battery.
- the under-voltage protection threshold to prevent damage to the battery, to ensure the service life and safety of the battery. If the under-voltage protection threshold of the battery is not increased, the battery may be damaged in scenarios where it cannot be charged in time.
- the charge and discharge protection circuit also compares the output voltage of the battery with the undervoltage protection threshold of the battery, and outputs a third control signal according to the comparison result.
- the third control signal is used to control the discharge circuit of the battery to be disconnected or Conduction.
- the third control signal is used to control the discharging circuit of the battery to turn on; when the output voltage of the battery is less than the under-voltage protection threshold of the battery, the third control signal is used to The discharge circuit of the control battery is disconnected, and undervoltage protection is performed.
- the present application also provides a battery discharge control method.
- the method includes: the charge and discharge protection circuit obtains the temperature of the battery connected to the charge protection circuit and the discharge current of the battery, and when the temperature of the battery is less than a set temperature threshold, And when the discharge current of the battery is greater than the set current threshold, the undervoltage protection threshold of the battery is reduced.
- the battery under-voltage protection threshold is reduced so that the battery can continue to discharge until the battery's The output voltage is less than the reduced under-voltage protection threshold, so that the unusable power in the battery due to low temperature can be released before the under-voltage protection threshold of the battery is adjusted, and the electric load connected by the charge and discharge protection circuit use.
- the charge-discharge protection circuit also increases the under-voltage protection threshold of the battery when the output voltage of the battery is less than the discharge cut-off voltage of the battery.
- the under-voltage protection threshold to prevent damage to the battery, to ensure the service life and safety of the battery. If the under-voltage protection threshold of the battery is not increased, the battery may be damaged in scenarios where it cannot be charged in time.
- the charge and discharge protection circuit also compares the output voltage of the battery with the undervoltage protection threshold of the battery, and outputs a third control signal according to the comparison result.
- the third control signal is used to control the discharge circuit of the battery to be disconnected or Conduction.
- the third control signal is used to control the discharging circuit of the battery to turn on; when the output voltage of the battery is less than the under-voltage protection threshold of the battery, the third control signal is used to The discharge circuit of the control battery is disconnected, and undervoltage protection is performed.
- this application also provides a charge-discharge protection circuit that includes a power terminal, a ground terminal, and an undervoltage protection threshold control terminal.
- the power terminal is used to connect the positive terminal of the battery, and the ground terminal is used to The negative terminal of the battery is connected, and the under-voltage protection threshold control terminal is used to receive the first control signal.
- the charge and discharge protection circuit is used to reduce the undervoltage protection threshold of the battery under the control of the first control signal when the number of charge and discharge cycles of the battery is greater than the set number and the discharge current of the battery is greater than the set current threshold.
- the charge-discharge protection circuit reduces the under-voltage protection threshold of the battery when the number of charge-discharge cycles of the battery is greater than the set number, that is, the battery is aging and the discharge current of the battery is greater than the set current threshold, so that the battery can Continue to discharge until the output voltage of the battery is lower than the reduced under-voltage protection threshold, so that before the under-voltage protection threshold of the battery is adjusted, the unusable power in the battery due to aging can be released and protected by charging and discharging Utilize the electrical load connected to the circuit.
- the undervoltage protection threshold control terminal is also used to receive the second control signal.
- the charge-discharge protection circuit is also used to increase the under-voltage protection threshold of the battery under the control of the second control signal when the output voltage of the battery is less than the discharge cut-off voltage of the battery.
- the under-voltage protection threshold to prevent damage to the battery, to ensure the service life and safety of the battery. If the under-voltage protection threshold of the battery is not increased, the battery may be damaged in scenarios where it cannot be charged in time.
- the charge and discharge protection circuit further includes a discharge control terminal, and the discharge control terminal is used to output a third control signal.
- the charge-discharge protection circuit is also used to compare the output voltage of the battery with the under-voltage protection threshold of the battery, and output a third control signal according to the comparison result.
- the third control signal is used to control the on or off of the battery discharge circuit. Among them, when the output voltage of the battery is greater than the under-voltage protection threshold of the battery, the third control signal is used to control the discharging circuit of the battery to turn on; when the output voltage of the battery is less than the under-voltage protection threshold of the battery, the third control signal is used to The discharge circuit of the control battery is disconnected, and undervoltage protection is performed.
- the charge and discharge protection circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator, and the battery sampling circuit is respectively connected to the power terminal, the ground terminal, the undervoltage protection threshold control terminal, and the first input terminal of the comparator.
- the reference voltage circuit is connected with the second input terminal of the comparator, and the output terminal of the comparator is connected with the discharge control terminal.
- the battery voltage sampling circuit is used to sample the output voltage of the battery and increase the sampling voltage under the control of the first control signal; the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery; the comparator, It is used to compare the output voltage of the reference voltage circuit with the increased sampling voltage, and output a third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first voltage dividing resistor, a second voltage dividing resistor, and a switch resistor array.
- the switch resistor array includes a plurality of branches connected in parallel, and each branch includes a third voltage dividing resistor. And a switch connected in series with the third voltage divider resistor. Wherein, the first end of the first voltage dividing resistor is respectively connected to the power supply terminal and the first end of the switch resistor array, and the second end of the first voltage dividing resistor is respectively connected to the first end of the second voltage dividing resistor and the switch resistor array.
- the second terminal is connected to the first input terminal of the comparator, the control terminal of the switch in the switch resistor array is connected to the undervoltage protection threshold control terminal, and the second terminal of the second voltage divider resistor is connected to the ground terminal; the first control signal is used for At least one switch in the switch resistance array is controlled to switch from an off state to an on state.
- the reference voltage circuit is a voltage source.
- the charge-discharge protection circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator.
- the battery sampling circuit is connected to the power supply terminal, the ground terminal, and the first input terminal of the comparator, and the reference voltage circuit is connected to the comparator.
- the second input terminal of the device is connected to the undervoltage protection threshold control terminal.
- the battery voltage sampling circuit is used to sample the output voltage of the battery; the reference voltage circuit is used to reduce the output voltage of the reference voltage circuit under the control of the first control signal; the output voltage of the reference voltage circuit is used to characterize The under-voltage protection threshold of the battery; the comparator is used to compare the output voltage of the reference voltage circuit with the output voltage of the cell voltage sampling circuit, and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first sampling resistor and a second sampling resistor.
- the first terminal of the first voltage dividing resistor is connected to the power terminal
- the second terminal of the first voltage dividing resistor is respectively connected to the first terminal of the second voltage dividing resistor and the first input terminal of the comparator.
- the second end of the resistor is connected to the ground end.
- the reference voltage circuit includes a plurality of parallel branches, and each branch includes a voltage source and a switch connected in series with the voltage source.
- the first terminal of the reference voltage circuit is grounded, the second terminal of the reference voltage circuit is connected to the second input terminal of the comparator, and the control terminal of the switch in the reference voltage circuit is connected to the undervoltage protection threshold control terminal; the first control signal It is used to control the first switch in the reference voltage circuit to switch from the on state to the off state, and to control the second switch in the reference voltage circuit to switch from the off state to the on state, and the voltage of the voltage source connected in series with the first switch is greater than The voltage of the voltage source connected in series with the second switch.
- the present application also provides a terminal device.
- the terminal device includes a processor and a charge-discharge protection circuit.
- the charge-discharge protection circuit includes a power terminal, a ground terminal, and an undervoltage protection threshold control terminal.
- the power terminal is used to connect to a battery.
- the grounding terminal is used to connect the negative terminal of the battery, and the undervoltage protection threshold control terminal is connected to the processor.
- the processor is used to reduce the discharge cut-off voltage of the battery and send the first control signal when the number of charge and discharge cycles of the battery is greater than the set number and the discharge current of the battery is greater than the set current threshold; the charge and discharge protection circuit , Used to reduce the under-voltage protection threshold of the battery under the control of the first control signal.
- the terminal device reduces the battery's under-voltage protection threshold and the battery's discharge cut-off voltage when the battery's charge and discharge cycles are greater than the set number, that is, when the battery is aging and the battery discharge current is greater than the set current threshold. , So that the battery can continue to discharge until the output voltage of the battery is less than the reduced under-voltage protection threshold, so that before the under-voltage protection threshold of the battery is adjusted, the unusable power in the battery due to aging can be released, and then The terminal device can continue to work and improve the endurance of the terminal device.
- the processor is also used to: when the output voltage of the battery is less than the discharge cut-off voltage of the battery, control the terminal device to shut down, increase the discharge cut-off voltage of the battery, and send a second control signal; the charge and discharge protection circuit also Used to increase the under-voltage protection threshold of the battery under the control of the second voltage signal.
- the terminal device After the terminal device is shut down, it will consume the power in the battery.
- the under-voltage protection threshold and the discharge cut-off voltage of the battery are increased, which can prevent the battery from being damaged, and ensure the service life and safety of the battery. If the under-voltage protection threshold of the battery and the discharge cut-off voltage of the battery are not increased, the battery may be damaged in scenarios that cannot be charged in time.
- the charge and discharge protection circuit further includes a discharge control terminal.
- the charge-discharge protection circuit is also used to compare the output voltage of the battery with the under-voltage protection threshold of the battery, and output a third control signal through the discharge control terminal according to the comparison result.
- the third control signal is used to control the discharge circuit of the battery to turn on or off .
- the third control signal is used to control the discharging circuit of the battery to turn on; when the output voltage of the battery is less than the under-voltage protection threshold of the battery, the third control signal is used to The discharge circuit of the control battery is disconnected, and undervoltage protection is performed.
- the charge and discharge protection circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator, and the battery sampling circuit is respectively connected to the power terminal, the ground terminal, the undervoltage protection threshold control terminal, and the first input terminal of the comparator.
- the reference voltage circuit is connected with the second input terminal of the comparator, and the output terminal of the comparator is connected with the discharge control terminal.
- the battery voltage sampling circuit is used to sample the output voltage of the battery and increase the sampling voltage under the control of the first control signal; the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery; the comparator, It is used to compare the output voltage of the reference voltage circuit with the increased sampling voltage, and output a third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first voltage dividing resistor, a second voltage dividing resistor, and a switch resistor array.
- the switch resistor array includes a plurality of branches connected in parallel, and each branch includes a third voltage dividing resistor. And a switch connected in series with the third voltage divider resistor. Wherein, the first end of the first voltage dividing resistor is respectively connected to the power terminal and the first end of the switch resistor array, and the second end of the first voltage dividing resistor is respectively connected to the first end of the second voltage dividing resistor and the switch resistor.
- the second terminal of the array is connected to the first input terminal of the comparator, the control terminal of the switch in the switch resistor array is connected to the undervoltage protection threshold control terminal, and the second terminal of the second voltage divider resistor is connected to the ground terminal; the first control signal It is used to control at least one switch in the switch resistance array to switch from the off state to the on state.
- the reference voltage circuit is a voltage source.
- the charge-discharge protection circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator.
- the battery sampling circuit is connected to the power supply terminal, the ground terminal, and the first input terminal of the comparator, and the reference voltage circuit is connected to the comparator.
- the second input terminal of the comparator and the undervoltage protection threshold control terminal are connected, and the output terminal of the comparator is connected with the discharge control terminal.
- the battery voltage sampling circuit is used to sample the battery voltage;
- the reference voltage circuit is used to reduce the output voltage produced by the reference voltage circuit under the control of the first control signal, and the output voltage of the reference voltage circuit is used to characterize The under-voltage protection threshold of the battery;
- a comparator used to compare the output voltage of the reference voltage circuit with the output voltage of the battery voltage sampling circuit, and output a third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first sampling resistor and a second sampling resistor; wherein, the first end of the first voltage dividing resistor is connected to the power source, and the second end of the first voltage dividing resistor is connected to the first The first end of the two voltage dividing resistor is connected to the first input end of the comparator, and the second end of the second voltage dividing resistor is connected to the ground terminal.
- the reference voltage circuit includes a plurality of parallel branches, and each branch includes a voltage source and a switch connected in series with the voltage source.
- the first terminal of the reference voltage circuit is grounded, the second terminal of the reference voltage circuit is connected to the second input terminal of the comparator, and the control terminal of the switch in the reference voltage circuit is connected to the undervoltage protection threshold control terminal; the first control signal is used for To control the first switch in the reference voltage circuit to switch from the on state to the off state, and to control the second switch in the reference voltage circuit to switch from the off state to the on state, the voltage of the voltage source connected in series with the first switch is greater than the first switch.
- this application also provides a charge-discharge protection circuit.
- the charge-discharge protection circuit includes a power terminal, a ground terminal, a current sampling terminal, a controller, and an undervoltage protection control circuit.
- the power terminal is used to connect to the positive electrode of the battery.
- the grounding terminal is used to connect the negative pole of the battery, and the controller is respectively connected with the undervoltage protection control circuit and the current sampling terminal.
- the controller is used to count the number of charge and discharge cycles of the battery, and obtain the discharge current of the battery through the current sampling terminal; when the number of charge and discharge cycles of the battery is greater than the set number, and the discharge current of the battery is greater than the set current threshold When the time, the first control signal is sent; the under-voltage protection control circuit is used to reduce the under-voltage protection threshold of the battery under the control of the first control signal.
- the charge-discharge protection circuit reduces the under-voltage protection threshold of the battery when the number of charge-discharge cycles of the battery is greater than the set number, that is, the battery is aging and the discharge current of the battery is greater than the set current threshold, so that the battery can Continue to discharge until the output voltage of the battery is lower than the reduced under-voltage protection threshold, so that before the under-voltage protection threshold of the battery is adjusted, the unusable power in the battery due to aging can be released and protected by charging and discharging Utilize the electrical load connected to the circuit.
- the controller is further used to send a second control signal when the output voltage of the battery is less than the discharge cut-off voltage of the battery; the undervoltage protection control circuit is also used to: under the control of the second control signal, Increase the under-voltage protection threshold of the battery.
- the under-voltage protection threshold to prevent damage to the battery, to ensure the service life and safety of the battery. If the under-voltage protection threshold of the battery is not increased, the battery may be damaged in scenarios where it cannot be charged in time.
- the charge-discharge protection circuit further includes a discharge control terminal, and the discharge control terminal is connected to the undervoltage protection control circuit.
- the under-voltage protection control circuit is also used to compare the output voltage of the battery with the under-voltage protection threshold of the battery, and output a third control signal through the discharge control terminal according to the comparison result.
- the third control signal is used to control the on or off of the battery discharge circuit open.
- the third control signal when the output voltage of the battery is greater than the under-voltage protection threshold of the battery, the third control signal is used to control the discharging circuit of the battery to turn on; when the output voltage of the battery is less than the under-voltage protection threshold of the battery, the third control signal is used to The discharge circuit of the control battery is disconnected, and undervoltage protection is performed.
- the undervoltage protection control circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator.
- the battery sampling circuit is connected to the power supply terminal, the ground terminal, the undervoltage protection threshold control terminal, and the first input terminal of the comparator.
- the reference voltage circuit is connected to the second input terminal of the comparator, and the output terminal of the comparator is connected to the discharge control terminal.
- the battery voltage sampling circuit is used to sample the output voltage of the battery and increase the sampling voltage under the control of the first control signal; the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery; the comparator, It is used to compare the output voltage of the reference voltage circuit with the increased sampling voltage, and output a third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first voltage dividing resistor, a second voltage dividing resistor, and a switch resistor array.
- the switch resistor array includes a plurality of branches connected in parallel, and each branch includes a third voltage dividing resistor. And a switch connected in series with the third voltage divider resistor. Wherein, the first end of the first voltage dividing resistor is respectively connected to the power supply terminal and the first end of the switch resistor array, and the second end of the first voltage dividing resistor is respectively connected to the first end of the second voltage dividing resistor and the switch resistor array.
- the second terminal is connected to the first input terminal of the comparator, the control terminal of the switch in the switch resistor array is connected to the undervoltage protection threshold control terminal, and the second terminal of the second voltage divider resistor is connected to the ground terminal; the first control signal is used for At least one switch in the switch resistance array is controlled to switch from the off state to the on state.
- the reference voltage circuit is a voltage source.
- the undervoltage protection control circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator.
- the battery sampling circuit is connected to the power supply terminal, the ground terminal, and the first input terminal of the comparator, and the reference voltage circuit is connected to The second input terminal of the comparator and the undervoltage protection threshold control terminal are connected.
- the battery voltage sampling circuit is used to sample the output voltage of the battery;
- the reference voltage circuit is used to reduce the output voltage of the reference voltage circuit under the control of the first control signal, and the output voltage of the reference voltage circuit is used to characterize The under-voltage protection threshold of the battery;
- a comparator used to compare the output voltage of the reference voltage circuit with the output voltage of the battery voltage sampling circuit, and output a third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first sampling resistor and a second sampling resistor.
- the first terminal of the first voltage dividing resistor is connected to the power terminal
- the second terminal of the first voltage dividing resistor is respectively connected to the first terminal of the second voltage dividing resistor and the first input terminal of the comparator.
- the second end of the resistor is connected to the ground end.
- the reference voltage circuit includes a plurality of parallel branches, and each branch includes a voltage source and a switch connected in series with the voltage source.
- the first terminal of the reference voltage circuit is grounded, the second terminal of the reference voltage circuit is connected to the second input terminal of the comparator, and the control terminal of the switch in the reference voltage circuit is connected to the undervoltage protection threshold control terminal; the first control signal It is used to control the first switch in the reference voltage circuit to switch from the on state to the off state, and to control the second switch in the reference voltage circuit to switch from the off state to the on state, and the voltage of the voltage source connected in series with the first switch is greater than The voltage of the voltage source connected in series with the second switch.
- this application also provides a terminal device, which includes a processor and a charge-discharge protection circuit.
- the processor is used to reduce the discharge cut-off voltage of the battery when the number of charge and discharge cycles of the battery connected to the charge and discharge protection circuit is greater than the set number, and the discharge current of the battery is greater than the set current threshold;
- the charge and discharge protection circuit Used to reduce the under-voltage protection threshold of the battery when the number of charge and discharge cycles of the battery is greater than the set number, and the discharge current of the battery is greater than the set current threshold.
- the terminal device reduces the battery's under-voltage protection threshold and the battery's discharge cut-off voltage when the battery's charge and discharge cycles are greater than the set number, that is, when the battery is aging and the battery discharge current is greater than the set current threshold. , So that the battery can continue to discharge until the output voltage of the battery is less than the reduced under-voltage protection threshold, so that before the under-voltage protection threshold of the battery is adjusted, the unusable power in the battery due to aging can be released, and then The terminal device can continue to work and improve the endurance of the terminal device.
- the processor is further used to: when the output voltage of the battery is less than the discharge cut-off voltage of the battery, control the terminal device to shut down and increase the discharge cut-off voltage of the battery; the charge-discharge protection circuit is also used to: The output voltage of the battery is less than the discharge cut-off voltage of the battery. After the terminal device is shut down, the under-voltage protection threshold of the battery is increased.
- the terminal device After the terminal device is shut down, it will consume the power in the battery.
- the under-voltage protection threshold and the discharge cut-off voltage of the battery are increased, which can prevent the battery from being damaged, and ensure the service life and safety of the battery. If the under-voltage protection threshold of the battery and the discharge cut-off voltage of the battery are not increased, the battery may be damaged in scenarios that cannot be charged in time.
- the charge and discharge protection circuit includes a power terminal, a ground terminal, a current sampling terminal, a controller, and an undervoltage protection control circuit.
- the power terminal is used to connect the positive electrode of the battery
- the ground terminal is used to connect the negative electrode of the battery to control
- the device is respectively connected with the under-voltage protection control circuit and the current sampling terminal.
- the controller is used to count the number of charge and discharge cycles of the battery, and obtain the discharge current of the battery through the current sampling terminal; when the number of charge and discharge cycles of the battery is greater than the set number, and the discharge current of the battery is greater than the set current threshold When the time, the first control signal is sent; the under-voltage protection control circuit is used to reduce the under-voltage protection threshold of the battery under the control of the first control signal.
- the charge and discharge protection circuit further includes a discharge control terminal.
- the charge-discharge protection circuit is also used to compare the output voltage of the battery with the under-voltage protection threshold of the battery, and output a third control signal through the discharge control terminal according to the comparison result.
- the third control signal is used to control the discharge circuit of the battery to turn on or disconnect.
- the third control signal is used to control the discharging circuit of the battery to turn on; when the output voltage of the battery is less than the under-voltage protection threshold of the battery, the third control signal is used to The discharge circuit of the control battery is disconnected, and undervoltage protection is performed.
- the undervoltage protection control circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator.
- the battery sampling circuit is connected to the power supply terminal, the ground terminal, the undervoltage protection threshold control terminal, and the first input terminal of the comparator.
- the reference voltage circuit is connected to the second input terminal of the comparator, and the output terminal of the comparator is connected to the discharge control terminal.
- the battery voltage sampling circuit is used to sample the output voltage of the battery and increase the sampling voltage under the control of the first control signal; the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery; the comparator, It is used to compare the output voltage of the reference voltage circuit with the increased sampling voltage, and output a third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first voltage dividing resistor, a second voltage dividing resistor, and a switch resistor array.
- the switch resistor array includes a plurality of branches connected in parallel, and each branch includes a third voltage dividing resistor. And a switch connected in series with the third voltage divider resistor. Wherein, the first end of the first voltage dividing resistor is respectively connected to the power supply terminal and the first end of the switch resistor array, and the second end of the first voltage dividing resistor is respectively connected to the first end of the second voltage dividing resistor and the switch resistor array.
- the second terminal is connected to the first input terminal of the comparator, the control terminal of the switch in the switch resistor array is connected to the undervoltage protection threshold control terminal, and the second terminal of the second voltage divider resistor is connected to the ground terminal; the first control signal It is used to control at least one switch in the switch resistance array to switch from the off state to the on state.
- the reference voltage circuit is a voltage source.
- the undervoltage protection control circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator.
- the battery sampling circuit is connected to the power supply terminal, the ground terminal, and the first input terminal of the comparator, and the reference voltage circuit is connected to The second input terminal of the comparator and the undervoltage protection threshold control terminal are connected, and the output terminal of the comparator is connected with the discharge control terminal.
- the battery voltage sampling circuit is used to sample the battery voltage;
- the reference voltage circuit is used to reduce the output voltage of the reference voltage circuit under the control of the first control signal, and the output voltage of the reference voltage circuit is used to characterize the battery The under-voltage protection threshold;
- a comparator used to compare the output voltage of the reference voltage circuit with the output voltage of the battery voltage sampling circuit, and output a third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first sampling resistor and a second sampling resistor.
- the first terminal of the first voltage dividing resistor is connected to the power terminal
- the second terminal of the first voltage dividing resistor is connected to the first terminal of the second voltage dividing resistor and the first input terminal of the comparator respectively.
- the second end of the resistor is connected to the ground end.
- the voltage test circuit includes a plurality of parallel branches, and each branch includes a voltage source and a switch connected in series with the voltage source.
- the first terminal of the reference voltage circuit is grounded, the second terminal of the reference voltage circuit is connected to the second input terminal of the comparator, and the control terminal of the switch in the reference voltage circuit is connected to the undervoltage protection threshold control terminal; the first control signal It is used to control the first switch in the reference voltage circuit to switch from the on state to the off state, and to control the second switch in the reference voltage circuit to switch from the off state to the on state, and the voltage of the voltage source connected in series with the first switch is greater than The voltage of the voltage source connected in series with the second switch.
- the present application also provides a battery discharge control method, the method includes: the terminal device detects the discharge current of the battery in the terminal device, and counts the number of charge and discharge cycles of the battery. When a certain number of times and the discharge current of the battery is greater than the set current threshold, the under-voltage protection threshold of the battery and the discharge cut-off voltage of the battery are reduced.
- the terminal device reduces the battery's under-voltage protection threshold and the battery's discharge cut-off voltage when the battery's charge and discharge cycles are greater than the set number, that is, when the battery is aging and the battery's discharge current is greater than the set current threshold. , So that the battery can continue to discharge until the output voltage of the battery is less than the reduced under-voltage protection threshold, so that before the under-voltage protection threshold of the battery is adjusted, the unusable power in the battery due to aging can be released, and then The terminal device can continue to work and improve the endurance of the terminal device.
- the terminal device when the output voltage of the battery is less than the discharge cut-off voltage of the battery, the terminal device is controlled to shut down, and the under-voltage protection threshold of the battery and the discharge cut-off voltage of the battery are increased.
- the terminal device After the terminal device is shut down, it will consume the power in the battery.
- the under-voltage protection threshold and the discharge cut-off voltage of the battery are increased, which can prevent the battery from being damaged, and ensure the service life and safety of the battery. If the under-voltage protection threshold of the battery and the discharge cut-off voltage of the battery are not increased, the battery may be damaged in scenarios that cannot be charged in time.
- the terminal device compares the output voltage of the battery with the undervoltage protection threshold of the battery, and controls the discharge loop of the battery to be turned on or off according to the comparison result. Among them, when the output voltage of the battery is greater than the under-voltage protection threshold of the battery, the terminal device controls the battery's discharge circuit to turn on; when the battery output voltage is less than the battery's under-voltage protection threshold, the terminal device controls the battery's discharge circuit to disconnect. Perform undervoltage protection.
- the present application also provides a battery discharge control method, the method includes: the number of charge and discharge cycles of the battery connected to the charge protection circuit by the charge and discharge protection circuit is greater than the set number, and the discharge current of the battery is greater than the set number When the current threshold is at the current threshold value, the first control signal is received, and under the control of the first control signal, the under-voltage protection threshold of the battery is reduced.
- the charge-discharge protection circuit reduces the under-voltage protection threshold of the battery when the number of charge-discharge cycles of the battery is greater than the set number, that is, the battery is aging and the discharge current of the battery is greater than the set current threshold, so that the battery can Continue to discharge until the output voltage of the battery is lower than the reduced under-voltage protection threshold, so that before the under-voltage protection threshold of the battery is adjusted, the unusable power in the battery due to aging can be released and protected by charging and discharging Utilize the electrical load connected to the circuit.
- the charge-discharge protection circuit receives the second control signal when the output voltage of the battery is less than the discharge cut-off voltage of the battery, and under the control of the second control signal, increases the under-voltage protection threshold of the battery to prevent If the battery is damaged, the service life and safety of the battery are guaranteed.
- the charge-discharge protection circuit compares the output voltage of the battery with the under-voltage protection threshold of the battery, and outputs a third control signal according to the comparison result.
- the third control signal is used to control the disconnection or conduction of the discharge circuit of the battery. through.
- the third control signal is used to control the discharging circuit of the battery to turn on; when the output voltage of the battery is less than the under-voltage protection threshold of the battery, the third control signal is used to The discharge circuit of the control battery is disconnected and undervoltage protection is performed.
- the present application also provides a battery discharge control method.
- the method includes: the charge and discharge protection circuit obtains the number of charge and discharge cycles of the battery connected to the charge protection circuit and the discharge current of the battery. When the number of times is greater than the set number and the discharge current of the battery is greater than the set current threshold, the under-voltage protection threshold of the battery is reduced.
- the charge-discharge protection circuit reduces the under-voltage protection threshold of the battery when the number of charge-discharge cycles of the battery is greater than the set number, that is, the battery is aging and the discharge current of the battery is greater than the set current threshold, so that the battery can Continue to discharge until the output voltage of the battery is lower than the reduced under-voltage protection threshold, so that before the under-voltage protection threshold of the battery is adjusted, the unusable power in the battery due to aging can be released and protected by charging and discharging Utilize the electrical load connected to the circuit.
- the charge-discharge protection circuit increases the under-voltage protection threshold of the battery when the output voltage of the battery is less than the discharge cut-off voltage of the battery.
- the under-voltage protection threshold to prevent damage to the battery, to ensure the service life and safety of the battery. If the under-voltage protection threshold of the battery is not increased, the battery may be damaged in scenarios where it cannot be charged in time.
- the charge-discharge protection circuit compares the output voltage of the battery with the undervoltage protection threshold of the battery, and outputs a third control signal according to the comparison result.
- the third control signal is used to control the disconnection or conduction of the battery discharge circuit.
- the third control signal is used to control the discharging circuit of the battery to turn on; when the output voltage of the battery is less than the under-voltage protection threshold of the battery, the third control signal is used to The discharge circuit of the control battery is disconnected and undervoltage protection is performed.
- connection in the above technical solution may be a direct connection or an indirect connection.
- FIG. 1 is a schematic diagram of an equivalent circuit of a battery provided by an embodiment of the application
- FIG. 2 is one of the schematic structural diagrams of a terminal device provided by an embodiment of this application.
- FIG. 3 is a schematic structural diagram of a charge and discharge protection chip provided by an embodiment of the application.
- FIG. 4 is a schematic flowchart of a first battery discharge control method provided by an embodiment of this application.
- FIG. 5 is a second structural diagram of a terminal device provided by an embodiment of this application.
- FIG. 6A is one of the structural schematic diagrams of a charging and discharging protection circuit provided by an embodiment of this application.
- 6B is the second structural diagram of a charging and discharging protection circuit provided by an embodiment of this application.
- FIG. 7A is the third structural diagram of a charging and discharging protection circuit provided by an embodiment of this application.
- FIG. 7B is the fourth structural diagram of a charging and discharging protection circuit provided by an embodiment of this application.
- FIG. 8 is the third structural diagram of a terminal device provided by an embodiment of this application.
- 9A is a schematic flowchart of a second battery discharge control method provided by an embodiment of the application.
- 9B is a schematic flowchart of a third battery discharge control method provided by an embodiment of the application.
- FIG. 10 is a schematic flowchart of a fourth battery discharge control method provided by an embodiment of the application.
- FIG. 11 is the fourth structural diagram of a terminal device provided by an embodiment of this application.
- 12A is a schematic flowchart of a fifth battery discharge control method provided by an embodiment of the application.
- FIG. 12B is a schematic flowchart of a sixth battery discharge control method provided by an embodiment of the application.
- the output voltage of the battery will gradually decrease.
- the output voltage of the battery is less than a certain threshold, it will cause damage to the battery, and even cause safety problems such as explosion and fire.
- it is necessary to set the discharge cut-off voltage and the under-voltage protection threshold to protect the battery from discharge.
- the equivalent model of the battery is a structure in which a voltage source and a resistor are connected in series, where the voltage of the voltage source is the open circuit voltage of the battery, and the resistor is the internal resistance of the battery.
- the output voltage of the battery U o V DD -IR, where V DD is the open circuit voltage of the battery, I is the discharge current of the battery, and R is the internal resistance of the battery.
- V DD the open circuit voltage of the battery
- I the discharge current of the battery
- R the internal resistance of the battery.
- the current under-voltage protection threshold and discharge cut-off voltage of the battery are set based on the performance of the battery at room temperature.
- the battery Compared with the battery capacity when the output voltage of the battery reaches the discharge cut-off voltage at room temperature, when the battery is working in a low temperature environment, when the battery output voltage reaches the battery discharge cut-off voltage set at room temperature, the battery has more However, the electrical load connected to the battery cannot continue to obtain power from the battery, resulting in that the battery’s power cannot be effectively used. For example, when taking pictures with a mobile phone outdoors in winter, although the mobile phone still has a certain amount of power, the mobile phone will suddenly shut down.
- embodiments of the present application provide a charging and discharging protection circuit, a terminal device, and a battery discharge control method.
- the method and the device may be based on the same inventive concept. Since the principles of the method and the device to solve the problem are similar, the implementation of the method and the device can be referred to each other, and the repetition will not be repeated.
- FIG. 2 is a hardware architecture diagram of a terminal device applied in an embodiment of the application.
- the terminal device may be a battery-powered device such as a mobile phone, a tablet computer, and a notebook computer.
- the terminal device 200 includes The battery 210, the charge and discharge protection circuit 220, and the electrical load 230.
- the charge and discharge protection circuit 220 may also be monolithically integrated to form a charge and discharge protection chip.
- the battery 210 is used to store and release electrical energy.
- the charge-discharge protection circuit 220 is used to protect the battery 210, and can prevent the battery 210 from being overcharged and/or over-discharged.
- the charge and discharge protection circuit 220 includes a power terminal VDD and a ground terminal VSS, a current sampling terminal IS, and a discharge control terminal DO.
- the power terminal VDD is respectively connected to one end of the capacitor C1 and one end of the resistor R1.
- the other end of the resistor R1 is connected to the positive electrode of the battery, the ground terminal VSS is respectively connected to the other end of the capacitor C1, one end of the sampling resistor R2 and the negative electrode of the battery, and the current sampling terminal IS is respectively connected to the other end of the current sampling resistor R2 and the metal oxide
- the source of the metal oxide semiconductor (MOS) M1 is connected, the discharge control terminal DO is connected to the gate of the MOS tube M1, the charging control terminal CO is connected to the gate of the MOS tube M2, and the drain of the MOS tube M1 is connected to the MOS. The drain of the tube M2 is connected.
- the charge and discharge protection circuit 220 controls the MOS tube M1 and the MOS tube M2 to be in the on state through the discharge control terminal DO and the charge control terminal CO, respectively; when the charge and discharge protection circuit 220 detects that the battery 210 is in an overdischarge state (When the battery 210 is discharged, the output voltage of the battery 210 gradually decreases. When the output voltage of the battery 210 decreases to the over-discharge protection voltage (that is, the under-voltage protection threshold), the battery 210 is in an over-discharge state), through the discharge control terminal DO controls the MOS tube M1 to disconnect, the discharge circuit of the battery 210 is cut off, and the battery 210 stops discharging.
- the over-discharge protection voltage that is, the under-voltage protection threshold
- the charge and discharge protection circuit 220 detects that the battery 210 is in an overcharged state (when the battery 210 is charged, the output voltage of the battery 210 gradually increases, and when the output voltage of the battery 210 increases to the overcharge protection voltage, the battery 210 is in an overcharged state ), the MOS tube M2 is controlled by the charge control terminal CO to disconnect, the charging circuit of the battery 210 is cut off, and the battery 210 stops charging.
- the electrical load 230 is an electronic component in the terminal device 200 that needs to use the electrical energy provided by the battery 210 to achieve its functions, such as the processor 231, temperature sensor 232, gravity sensor, distance sensor, fingerprint sensor and other sensors, display screens, and radio frequency chips And so on (not shown in Figure 4).
- the terminal device 200 may further include a charging interface 240, which is used to connect to a corresponding power adapter, and obtain electric energy from an external power source through the power adapter to charge the battery 210.
- the charging interface 240 may specifically be a micro USB (abbreviation of universal serial bus) interface, Type-C interface, or lightning interface.
- an embodiment of the present application provides a battery discharge control method, which can be applied to the terminal device shown in FIG. 2.
- the method mainly includes the following steps:
- the terminal device 200 detects the temperature of the battery 210 and the discharge current of the battery 210.
- the under-voltage protection threshold of the battery 210 is less than the discharge cut-off voltage of the battery 210, and the set temperature threshold may be 10°C, 2°C or 0°C.
- the set temperature threshold may be 10°C, 2°C or 0°C.
- the terminal device 200 further performs step S403: when the output voltage of the battery 210 is less than the discharge cut-off voltage, the terminal device 200 is controlled to shut down (ie disconnect the electrical load 230 connected to the battery 210), and increase the battery
- the under-voltage protection threshold of 210 and the discharge cut-off voltage of the battery 210 prevent damage to the battery 210 and ensure the service life and safety of the battery 210.
- the terminal device 200 After the battery 210 in the terminal device 200 is disconnected from the electric load 230, the terminal device 200 is in the shutdown state, but the terminal device 200 will also consume the power in the battery 210. If the undervoltage protection threshold of the battery 210 and the battery 210 are not increased The discharge cut-off voltage may damage the battery 210 in a scenario where it cannot be charged in time. In addition, after the battery 210 is charged, the temperature of the battery 210 and/or the discharge current of the battery 210 will change. It is necessary to determine whether the undervoltage protection threshold and the discharge current of the battery 210 need to be adjusted according to the current temperature of the battery 210 and the discharge current of the battery 210. Cut-off voltage. For example, when the battery 210 is fully charged, if the discharge current of the battery 210 is small, even if the temperature of the battery 210 is low, the undervoltage protection threshold and the discharge cut-off voltage of the battery 210 may not be adjusted.
- the terminal device 200 may adjust the undervoltage protection threshold of the battery 210 to a first default value, and adjust the discharge cut-off voltage of the battery 210 to a second default value.
- the first default value is usually set as the under-voltage protection threshold of the battery 210 at room temperature
- the second default value is usually set as the discharge cut-off voltage of the battery 210 at room temperature.
- the terminal device 200 also compares the output voltage of the battery 210 with the undervoltage protection threshold of the battery 210, and controls the discharge circuit of the battery 210 to be turned on or off according to the comparison result. Wherein, when the output voltage of the battery 210 is greater than the undervoltage protection threshold of the battery 210, the terminal device 200 controls the discharge loop of the battery 210 to conduct; when the output voltage of the battery 210 is less than the undervoltage protection threshold of the battery 210, the terminal device 200 controls The discharge circuit of the battery 210 is disconnected, and undervoltage protection is performed.
- the terminal device 200 can control the charge and discharge protection circuit 220 to adjust the undervoltage protection threshold of the battery 210 through the processor 231 in the terminal device 200, and adjust the discharge of the battery 210 through the processor 231 in the terminal device. Cut-off voltage.
- the terminal device 200 includes a processor 231 and a charge-discharge protection circuit 220.
- the charge-discharge protection circuit 220 includes a power terminal VDD, a ground terminal VSS, and an undervoltage protection threshold control terminal UVC.
- the power terminal VDD is used to connect to the battery 210
- the positive pole, the ground terminal VSS is used to connect the negative pole of the battery 210, and the undervoltage protection threshold control terminal UVC is connected to the processor 231, as shown in FIG. 5.
- the processor 231 is configured to reduce the discharge cut-off voltage of the battery 210 and send the first control signal when the temperature of the battery 210 is less than the set temperature threshold and the discharge current of the battery is greater than the set current threshold. Specifically, the processor 231 may reduce the discharge cut-off voltage of the battery 210 in the following manner: the processor 231 modifies the saved discharge cut-off voltage value from a first value to a second value, where the second value is smaller than the first value.
- the charge and discharge protection circuit 220 is configured to receive the first control signal through the undervoltage protection threshold control terminal UVC, and under the control of the first control signal, reduce the undervoltage protection threshold of the battery 210.
- the terminal device 200 further includes a temperature sensor 232 and a current sampling circuit 233.
- the processor 231 acquires the temperature of the battery 210 through the temperature sensor 232, and acquires the discharge current of the battery 210 through the current sampling circuit 233, and according to the acquired temperature of the battery 210 , Determine whether the temperature of the battery 210 is less than the set temperature threshold, and determine whether the discharge current of the battery 210 is greater than the set current threshold according to the acquired discharge current of the battery 210.
- the processor 231 may also obtain the current of the charge and discharge protection circuit 220 from the charge and discharge protection circuit 220 through the current output terminal on the charge and discharge protection circuit 220 The discharge current of the battery 210 detected by the sampling terminal IS.
- the processor 231 may also obtain the temperature sampling terminal of the charge and discharge protection circuit 220 from the charge and discharge protection circuit 220 through the temperature output terminal on the charge and discharge protection circuit 220 The temperature of the battery 210 detected by the TS.
- the processor 231 is further configured to: when the output voltage of the battery 210 is less than the discharge cut-off voltage of the battery 210, control the terminal device 200 to shut down, increase the discharge cut-off voltage of the battery 210, and send a second control signal; a charge-discharge protection circuit 220 is also used to increase the undervoltage protection threshold of the battery 210 under the control of the second control signal.
- the charge-discharge protection circuit 220 further includes a discharge control terminal DO.
- the charge-discharge protection circuit 220 is also used to compare the output voltage of the battery 210 with the undervoltage protection threshold of the battery 210, and output a third output voltage through the discharge control terminal DO according to the comparison result.
- the control signal, the third control signal is used to control the discharge loop of the battery 210 to be turned on or off.
- the third control signal when the output voltage of the battery 210 is greater than the undervoltage protection threshold of the battery 210, the third control signal is used to control the discharging circuit of the battery 210 to conduct; when the output voltage of the battery 210 is less than the undervoltage protection threshold of the battery 210, the third control signal is The three control signals are used to control the discharge circuit of the battery 210 to be disconnected and perform under-voltage protection.
- a switch S1 is connected to the path between the electrical load 230 and the battery 210.
- the terminal device 200 controls the switch S0 to turn off, disconnecting the battery 210. With the electric load 230, the terminal device 200 is shut down.
- the charge-discharge protection circuit 220 can be implemented by, but not limited to, any of the following two ways:
- the charge and discharge protection circuit includes a battery voltage sampling circuit 221, a reference voltage circuit 222, and a comparator 223.
- the battery sampling circuit 221 is connected to the power supply terminal VDD, the ground terminal VSS, and the undervoltage protection threshold control terminal UVC.
- the first input terminal of the comparator 223 is connected, the reference voltage circuit 222 is connected with the second input terminal of the comparator 223, and the output terminal of the comparator 223 is connected with the discharge control terminal DO. among them,
- the battery voltage sampling circuit 221 is configured to sample the output voltage of the battery 210 and increase the sampling voltage under the control of the first control signal.
- the output voltage of the reference voltage circuit 222 is used to characterize the undervoltage protection threshold of the battery 210;
- the comparator 223 is used to compare the output voltage of the reference voltage circuit 222 with the increased sampling voltage, and output a third control signal according to the comparison result. Specifically, when the output voltage of the reference voltage circuit 222 is less than the increased sampling voltage, the third control signal is used to control the conduction of the discharge loop of the battery 210. When the output voltage of the reference voltage circuit 222 is greater than the increased sampling voltage, The third control signal is used to control the discharge circuit of the battery 210 to be disconnected.
- the battery 210 can continue to discharge until the increased sampling voltage of the battery 210 is less than the reference voltage
- the output voltage of the circuit 222 is equivalent to reducing the under-voltage protection threshold, so that before the under-voltage protection threshold of the battery 210 is adjusted, the unusable power in the battery 210 due to low temperature can be released and protected by charging and discharging.
- the electric load connected to the circuit 220 is utilized.
- the battery voltage sampling circuit 221 is also used to reduce the sampling voltage under the control of the second control signal.
- the battery voltage sampling circuit 221 may include a first voltage dividing resistor Ra, a second voltage dividing resistor Rb, and a switch resistor array 610.
- the switch resistor array 610 includes a plurality of parallel branches, each The branch includes a third voltage dividing resistor Rc and a switch S1 connected in series with the third voltage dividing resistor Rc.
- the first end of the first voltage dividing resistor Ra is respectively connected to the power supply terminal VDD and the first end of the switch resistor array 610
- the second end of the first voltage dividing resistor Ra is respectively connected to the first end of the second voltage dividing resistor Rb.
- the second terminal of the switch resistor array 610 and the first input terminal of the comparator 223 are connected, the control terminal of the switch S1 in the switch resistor array 610 is connected to the undervoltage protection threshold control terminal UVC, and the second terminal of the second voltage divider Rb Connected to the ground terminal VSS; the first control signal is used to control at least one switch S1 in the switch resistor array 610 to switch from the off state to the on state.
- the equivalent resistance of the switch resistor array 610 decreases, and the voltage across the second voltage divider Rb increases, so that the battery 210 is sampled The voltage increases.
- the second control signal is used to control at least one switch S1 in the switch resistor array 610 to switch from the on state to the off state. After at least one switch S1 in the switch resistor array 610 is switched from the on state to the off state, the equivalent resistance of the switch resistor array 610 increases, and the voltage across the second voltage dividing resistor Rb decreases, so that the battery 210 is sampled The voltage decreases.
- the first voltage dividing resistor Ra, the second voltage dividing resistor Rb, and the third voltage dividing resistor Rc involved in FIG. 6B may be a single resistor, or multiple resistors may be connected in series, in parallel, or in series. It is obtained that the size of the third voltage dividing resistor Rc included in each branch in the switch resistor array 610 may be the same or different.
- the switch S1 involved in FIG. 6B may be a controllable switch such as a triode or a MOS tube.
- multiple branches in the switch resistor array 610 may also share a single-pole multi-throw switch.
- the reference voltage circuit 222 may be a voltage source.
- the under-voltage protection control circuit 220 includes a battery voltage sampling circuit 221, a reference voltage circuit 222, and a comparator 223.
- the battery sampling circuit 221 is connected to the power supply terminal VDD, the ground terminal VSS, and the comparator 223.
- An input terminal is connected, the reference voltage circuit 222 is respectively connected to the second input terminal of the comparator 223 and the undervoltage protection threshold control terminal UVC, and the output terminal of the comparator is connected to the discharge control terminal. among them,
- the battery voltage sampling circuit 221 is used to sample the voltage of the battery 210.
- the reference voltage circuit 222 is used to reduce the output voltage of the reference voltage circuit 222 under the control of the first control signal.
- the output voltage of the reference voltage circuit 222 is used to represent the undervoltage protection threshold of the battery 210.
- the comparator 223 is used to compare the output voltage of the battery voltage sampling circuit 221 with the output voltage of the reference voltage circuit 222, and output a third control signal according to the comparison result. Specifically, when the output voltage of the battery voltage sampling circuit 221 is greater than the output voltage of the reference voltage circuit 222, the third control signal is used to control the conduction of the discharge loop of the battery 210, and when the output voltage of the battery voltage sampling circuit 221 is less than the reference voltage circuit At the output voltage of 222, the third control signal is used to control the discharge circuit of the battery 210 to disconnect.
- the battery 210 can continue to discharge until the output voltage of the battery voltage sampling circuit 221 is less than the output voltage of the reference voltage circuit 222, so that the undervoltage of the battery 210 Before the protection threshold is adjusted, the unusable power in the battery 210 due to the low temperature can be released and used by the electrical load connected to the charge and discharge protection circuit 220.
- the reference voltage circuit 222 is also used to increase the output voltage of the reference voltage circuit 222 under the control of the second control signal.
- the battery voltage sampling circuit 221 includes a first sampling resistor Ra and a second sampling resistor Rb; wherein, the first end of the first voltage dividing resistor Ra is connected to the power supply terminal VDD, and the first voltage dividing resistor The second terminal of Ra is respectively connected to the first terminal of the second voltage dividing resistor Rb and the first input terminal of the comparator 223, and the second terminal of the second voltage dividing resistor Rb is connected to the ground terminal VSS.
- the reference voltage circuit 222 includes a plurality of parallel branches, and each branch includes a voltage source and a switch S2 connected in series with the voltage source.
- the first terminal of the reference voltage circuit 222 is grounded, the second terminal of the reference voltage circuit 222 is connected to the second input terminal of the comparator 223, and the control terminal of the switch in the reference voltage circuit 222 is connected to the undervoltage protection threshold control terminal UVC.
- the first control signal is used to control the first switch in the reference voltage circuit 222 to switch from the on state to the off state, and to control the second switch in the reference voltage circuit 222 to switch from the off state to the on state, the first switch
- the voltage of the voltage source connected in series is greater than the voltage of the voltage source connected in series with the second switch.
- the second control signal is used to control the first switch in the reference voltage circuit 222 to switch from the off state to the on state, and to control the second switch in the reference voltage circuit 222 to switch from the on state to the off state.
- first voltage dividing resistor Ra and the second voltage dividing resistor Rb involved in FIG. 7B may be a single resistor, or multiple resistors may be obtained through series, parallel, or hybrid connection.
- the switch S2 involved in the foregoing FIG. 7B may be a controllable switch such as a triode, a MOS tube, or the like.
- multiple branches in the reference voltage circuit 222 may also share a single-pole multi-throw switch.
- the terminal device 200 may adjust the undervoltage protection threshold of the battery 210 through the charge and discharge protection circuit 220 in the terminal device, and adjust the discharge cut-off voltage of the battery 210 through the processor 231.
- the terminal device 200 includes a processor 231 and a charging and discharging protection circuit 220.
- the processor 231 is used for when the temperature of the battery 210 is less than the set temperature threshold and the discharge current of the battery 210 is greater than the set current threshold , Reduce the discharge cut-off voltage of the battery 210; the charge and discharge protection circuit 220 is used to reduce the charge and discharge protection circuit when the temperature of the battery 210 is less than the set temperature threshold and the discharge current of the battery 210 is greater than the set current threshold
- the under-voltage protection threshold of the battery 210 connected to 220 is shown in FIG. 8.
- the processor 231 is further used to: when the output voltage of the battery 210 is less than the discharge cut-off voltage of the battery 210, control the terminal device 200 to shut down and increase the discharge cut-off voltage of the battery 210; the charge-discharge protection circuit 220 is also used to: The output voltage of the battery 210 is less than the discharge cut-off voltage of the battery 210. After the terminal device 200 is shut down, the undervoltage protection threshold of the battery 210 is increased.
- the charge and discharge protection circuit 220 includes a power supply terminal VDD, a ground terminal VSS, a temperature sampling terminal TS, a current sampling terminal IS, a controller 810, and an undervoltage protection control circuit 820.
- the power supply terminal VDD is used for The positive electrode of the battery 210 is connected, and the ground terminal VDD is used to connect the negative electrode of the battery 210.
- the controller 810 is respectively connected to the undervoltage protection control circuit 820, the temperature sampling terminal TS and the current sampling terminal IS. among them,
- the controller 810 is configured to obtain the temperature of the battery 210 through the temperature sampling terminal TS, and the discharge current of the battery 210 through the current sampling terminal IS; when the temperature of the battery 210 is less than the set temperature threshold, and the discharge current of the battery 210 is greater than the set When the current threshold is set, the first control signal is sent.
- the under-voltage protection control circuit 820 is used to reduce the under-voltage protection threshold of the battery 210 under the control of the first control signal.
- controller 810 may be implemented by software, that is, the controller 810 may have implemented the functions of the controller 810 described above by calling code instructions stored in a memory (not shown in the figure) in the charge and discharge protection circuit 220;
- the functions of the controller 810 can also be implemented by hardware, for example, by a comparator.
- the charge and discharge protection circuit 220 further includes a discharge control terminal DO.
- the undervoltage protection control circuit 820 is also used to compare the output voltage of the battery 210 with the undervoltage protection threshold of the battery 210, and output the DO through the discharge control terminal according to the comparison result. Three control signals.
- the third control signal is used to control the on or off of the discharge circuit of the battery 210. Wherein, when the output voltage of the battery 210 is greater than the undervoltage protection threshold of the battery 210, the third control signal is used to control the discharging circuit of the battery 210 to conduct. When the output voltage of the battery 210 is less than the undervoltage protection threshold of the battery 210, the third control signal The three control signals are used to control the discharge circuit of the battery 210 to be disconnected and perform under-voltage protection.
- the under-voltage protection control circuit 820 can be implemented by, but not limited to, the structure shown in FIG. 6A or FIG. 7A.
- the under-voltage protection The battery voltage sampling circuit and the reference voltage circuit in the control circuit 820 can be specifically realized by the structure shown in FIG. 6B.
- the undervoltage protection control circuit 820 is realized by the structure shown in FIG. 7A, the undervoltage protection control circuit 820 The battery voltage sampling circuit and the reference voltage circuit can be specifically implemented by the structure shown in FIG. 7B, which will not be repeated here.
- the terminal device 200 reduces the undervoltage protection threshold of the battery 210 and the discharge cut-off voltage of the battery 210, The battery 210 can continue to discharge until the output voltage of the battery 210 is less than the reduced under-voltage protection threshold, so that before the under-voltage protection threshold of the battery 210 is adjusted, the unusable power in the battery 210 due to low temperature can be removed. Released so that the terminal device 200 can continue to work and improve the endurance capability of the terminal device 200.
- the embodiments of the present application also provide a charge-discharge protection circuit 220 to adjust the under-voltage protection threshold of the battery in a low-temperature environment.
- the charge-discharge protection circuit 220 includes a power terminal VDD, a ground terminal VSS, and an undervoltage protection threshold control terminal UVC.
- the power terminal VDD is used to connect to the positive electrode of the battery 210 and ground.
- the terminal VSS is used to connect the negative electrode of the battery 210, and the under-voltage protection threshold control terminal UVC is used to receive the first control signal, and the charge-discharge protection circuit is used when the temperature of the battery 210 is lower than the set temperature threshold and the discharge current of the battery 210 When it is greater than the set current threshold, under the control of the first control signal, the undervoltage protection threshold of the battery 210 is reduced.
- the under-voltage protection threshold control terminal UVC is also used to receive a second control signal
- the charge-discharge protection circuit 220 is also used to: when the output voltage of the battery 210 is less than the discharge cut-off voltage of the battery 210, the second control signal controls Next, the undervoltage protection threshold of the battery 210 is increased.
- the charge and discharge protection circuit 220 further includes a discharge control terminal DO, which is used to output a third control signal; the charge and discharge protection circuit 220 is also used to: compare the output voltage of the battery with the undervoltage protection threshold of the battery, according to The comparison result outputs a third control signal, and the third control signal is used to control the on or off of the discharge loop of the battery.
- a discharge control terminal DO which is used to output a third control signal
- the charge and discharge protection circuit 220 is also used to: compare the output voltage of the battery with the undervoltage protection threshold of the battery, according to The comparison result outputs a third control signal, and the third control signal is used to control the on or off of the discharge loop of the battery.
- the charge-discharge protection circuit 220 may be implemented by, but not limited to, the structure shown in FIG. 6A or FIG. 7A.
- the charge-discharge protection circuit 220 When the charge-discharge protection circuit 220 is implemented by the structure shown in FIG. 6A, the charge-discharge protection circuit 220
- the battery voltage sampling circuit and the reference voltage circuit in FIG. 6B can be specifically realized by the structure shown in FIG. 6B.
- the charge and discharge protection circuit 220 is realized by the structure shown in FIG. 7A, the battery voltage sampling circuit in the charge and discharge protection circuit 220 And the reference voltage circuit can be specifically realized by the structure shown in FIG. 7B, which will not be repeated here.
- the charge and discharge protection circuit 220 includes a power terminal VDD, a ground terminal VSS, a temperature sampling terminal TS, a current sampling terminal IS, a controller 810, and an undervoltage protection control circuit 820.
- the power terminal VDD is used to connect the positive electrode of the battery 210
- the ground terminal VDD is used to connect the negative electrode of the battery 210.
- the controller 810 is respectively connected to the undervoltage protection control circuit 820, the temperature sampling terminal TS, and the current sampling terminal IS.
- the controller 810 is configured to obtain the temperature of the battery 210 through the temperature sampling terminal TS, and the discharge current of the battery 210 through the current sampling terminal IS; when the temperature of the battery 210 is less than the set temperature threshold, and the discharge current of the battery 210 is greater than When the current threshold is set, the first control signal is sent; the undervoltage protection control circuit 820 is used to reduce the undervoltage protection threshold of the battery 210 under the control of the first control signal.
- controller 810 is also used to send a second control signal when the output voltage of the battery 210 is less than the discharge cut-off voltage of the battery 210; the undervoltage protection control circuit 820 is also used to: under the control of the second control signal, The under-voltage protection threshold of the battery 210 is increased.
- the charge and discharge protection circuit 220 further includes a discharge control terminal DO, which is connected to an undervoltage protection control circuit 820; the undervoltage protection control circuit 820 is also used to compare the output voltage of the battery 210 with the undervoltage of the battery 210 For the protection threshold, a third control signal is output through the discharge control terminal DO according to the comparison result, and the third control signal is used to control the discharge circuit of the battery 210 to be turned on or off.
- the under-voltage protection control circuit 820 can be implemented by, but not limited to, the structure shown in FIG. 6A or FIG. 7A.
- the under-voltage protection The battery voltage sampling circuit and the reference voltage circuit in the control circuit 820 can be specifically realized by the structure shown in FIG. 6B.
- the undervoltage protection control circuit 820 is realized by the structure shown in FIG. 7A, the undervoltage protection control circuit 820 The battery voltage sampling circuit and the reference voltage circuit can be specifically implemented by the structure shown in FIG. 7B, which will not be repeated here.
- the embodiment of the present application also provides a battery discharge control method, which is applied to the first charge-discharge protection circuit 220 described above, that is, the battery 210 works in a low-temperature environment, and the charge-discharge protection circuit 220 adjusts the battery through a control signal received from the outside. 210 under-voltage protection threshold.
- the method includes:
- the charge-discharge protection circuit 220 when the output voltage of the battery 210 is less than the discharge cut-off voltage of the battery 210, the charge-discharge protection circuit 220 also receives a second control signal, and under the control of the second control signal, increases the undervoltage protection threshold of the battery 210.
- the charge-discharge protection circuit 220 compares the output voltage of the battery 210 with the under-voltage protection threshold of the battery 210, and outputs a third control signal according to the comparison result.
- the third control signal is used to control the discharge circuit of the battery 210 to be disconnected or turned on.
- the third control signal is used to control the discharge circuit of the battery 210 to turn on, and when the output voltage of the battery 210 is less than the under-voltage protection threshold of the battery 210, the third control The signal is used to control the discharge circuit of the battery 210 to be disconnected.
- the embodiment of the present application also provides a battery discharge control method, which is applied to the second charge-discharge protection circuit 220 described above, that is, the battery 210 works in a low-temperature environment, and the charge-discharge protection circuit 220 adjusts the undervoltage protection threshold of the battery 210 by itself.
- the method includes:
- S901B Obtain the temperature of the battery 210 connected to the charging protection circuit 220 and the discharge current of the battery 210.
- the charge-discharge protection circuit 220 also increases the under-voltage protection threshold of the battery 210 when the output voltage of the battery 210 is less than the discharge cut-off voltage of the battery 210.
- the charge-discharge protection circuit 220 compares the output voltage of the battery 210 with the under-voltage protection threshold of the battery 210, and outputs a third control signal according to the comparison result.
- the third control signal is used to control the discharge circuit of the battery 210 to be disconnected or turned on.
- the charge and discharge protection circuit 220 reduces the undervoltage protection threshold of the battery 210 so that the battery 210 can continue Discharge until the output voltage of the battery 210 is less than the reduced under-voltage protection threshold, so that before the under-voltage protection threshold of the battery 210 is adjusted, the unusable power in the battery 210 due to low temperature can be released and charged.
- the load connected to the discharge protection circuit 220 is used.
- the battery in the terminal device needs to be cyclically charged and discharged when the terminal device is working.
- the current battery under-voltage protection threshold and discharge cut-off voltage are usually set based on the performance of a new battery at room temperature.
- the aging battery When the output voltage reaches the discharge cut-off voltage of the battery set at room temperature, the aging battery still has more power, but the electrical load connected to the battery cannot continue to obtain power from the battery, resulting in the battery power cannot be obtained use efficiently.
- the present application also provides a battery discharge control method, which can be applied to the terminal device as shown in FIG. 2.
- the method mainly includes the following steps:
- the terminal device 200 detects the discharge current of the battery 210 in the terminal device 200, and counts the number of charge and discharge cycles of the battery 210.
- the number of charge and discharge cycles of the battery 210 can indicate the degree of aging of the battery 210.
- the under-voltage protection threshold of the battery 210 is less than the discharge cut-off voltage of the battery 210, and the set times can be 500 times, 600 times, or 450 times, and the set times can be set according to actual conditions.
- the number of charge and discharge cycles of the battery 210 is greater than the set number, and the discharge current of the battery 210 is greater than the set current threshold, the battery 210 is aging, and the output voltage of the battery 210 is close to the currently set discharge cut-off voltage.
- the under-voltage protection threshold of 210 and the discharge cut-off voltage are adjusted, and the electrical load 230 connected to the battery 210 will be disconnected, and the electrical load 230 cannot continue to work.
- the terminal device 200 also performs step S1003: when the output voltage of the battery 210 is less than the reduced discharge cut-off voltage, the terminal device 200 is controlled to shut down (that is, the electrical load 230 connected to the battery 210 is disconnected), and the battery 210 is increased
- the under-voltage protection threshold and the discharge cut-off voltage of the battery 210 prevent damage to the battery 210 and ensure the service life and safety of the battery 210.
- the terminal device 200 After the battery 210 in the terminal device 200 is disconnected from the electric load 230, the terminal device 200 is in the shutdown state, but the terminal device 200 will also consume the power in the battery 210. If the undervoltage protection threshold of the battery 210 and the battery 210 are not increased The discharge cut-off voltage may damage the battery 210 in a scenario where it cannot be charged in time. In addition, after the battery 210 is charged, the discharge current of the battery 210 will change. It is necessary to determine whether the undervoltage protection threshold and the discharge cut-off voltage of the battery 210 need to be adjusted according to the current number of charge and discharge cycles of the battery 210 and the discharge current of the battery 210.
- the undervoltage protection threshold and the discharge cut-off voltage of the battery 210 may not be adjusted.
- the terminal device 200 may adjust the undervoltage protection threshold of the battery 210 to a first default value, and adjust the discharge cut-off voltage of the battery 210 to a second default value.
- the first default value is usually set as the undervoltage protection threshold when the battery 210 is a new battery (without aging), and the second default value is usually set as the discharge cut-off voltage when the battery 210 is a new battery (without aging).
- the terminal device 200 also compares the output voltage of the battery 210 with the undervoltage protection threshold of the battery 210, and controls the discharge circuit of the battery 210 to be turned on or off according to the comparison result. Wherein, when the output voltage of the battery 210 is greater than the undervoltage protection threshold of the battery 210, the discharge circuit of the battery 210 is controlled to be turned on; when the output voltage of the battery 210 is less than the undervoltage protection threshold of the battery 210, the discharge circuit of the battery 210 is controlled to be turned off Open for under-voltage protection.
- the terminal device 200 can control the charge and discharge protection circuit 220 to adjust the undervoltage protection threshold of the battery 210 through the processor 231 in the terminal device 200, and adjust the discharge of the battery 210 through the processor 231 in the terminal device. Cut-off voltage.
- the terminal device 200 includes a processor 231 and a charge-discharge protection circuit 220.
- the charge-discharge protection circuit 220 includes a power terminal VDD, a ground terminal VSS, and an undervoltage protection threshold control terminal UVC.
- the power terminal VDD is used to connect to the battery 210
- the positive pole, the ground terminal VSS is used to connect the negative pole of the battery 210, and the undervoltage protection threshold control terminal UVC is connected to the processor 231, as shown in FIG. 5.
- the processor 231 is configured to reduce the discharge cut-off voltage of the battery 210 and send the first control signal when the number of charge and discharge cycles of the battery 210 is greater than the set number and the discharge current of the battery 210 is greater than the set current threshold. Specifically, the processor 231 may reduce the discharge cut-off voltage of the battery 210 in the following manner: the processor 231 modifies the saved discharge cut-off voltage value from a first value to a second value, where the second value is smaller than the first value.
- the charge and discharge protection circuit 220 is configured to receive the first control signal through the undervoltage protection threshold control terminal UVC, and under the control of the first control signal, reduce the undervoltage protection threshold of the battery 210.
- the terminal device 200 further includes a current sampling circuit 233.
- the processor 231 obtains the discharge current of the battery 210 through the current sampling circuit 233, and determines whether the discharge current of the battery 210 is greater than the set current according to the obtained discharge current of the battery 210 Threshold.
- the processor 231 may also output the current through the charge and discharge protection circuit 220 Terminal to obtain the discharge current of the battery 210 detected by the current sampling terminal IS of the charge-discharge protection circuit 220.
- the processor 231 is further configured to: when the output voltage of the battery 210 is less than the discharge cut-off voltage of the battery 210, control the terminal device 200 to shut down, increase the discharge cut-off voltage of the battery 210, and send a second control signal; a charge-discharge protection circuit 220 is also used to increase the undervoltage protection threshold of the battery 210 under the control of the second control signal.
- the terminal device 200 further includes a voltage sampling circuit 234.
- the processor 231 obtains the output voltage of the battery 210 through the voltage sampling circuit 234, and determines whether the output voltage of the battery 210 is less than the discharge of the battery 210 according to the obtained output voltage of the battery 210. Cut-off voltage.
- the charge-discharge protection circuit 220 further includes a discharge control terminal DO.
- the charge-discharge protection circuit 220 is also used to compare the output voltage of the battery 210 with the undervoltage protection threshold of the battery 210, and output a third output voltage through the discharge control terminal DO according to the comparison result.
- the control signal, the third control signal is used to control the discharge loop of the battery 210 to be turned on or off.
- the third control signal when the output voltage of the battery 210 is greater than the undervoltage protection threshold of the battery 210, the third control signal is used to control the discharging circuit of the battery 210 to conduct; when the output voltage of the battery 210 is less than the undervoltage protection threshold of the battery 210, the third control signal is The three control signals are used to control the discharge circuit of the battery 210 to be disconnected and perform under-voltage protection.
- a switch S1 is connected to the path between the electrical load 230 and the battery 210.
- the terminal device 200 controls the switch S0 to turn off, disconnecting the battery 210. With the electric load 230, the terminal device 200 is shut down.
- the charge-discharge protection circuit 220 may be implemented by, but not limited to, the structure shown in FIG. 6A or FIG. 7A.
- the charge-discharge protection circuit 220 When the charge-discharge protection circuit 220 is implemented by the structure shown in FIG. 6A, the charge-discharge protection circuit 220
- the battery voltage sampling circuit and the reference voltage circuit in FIG. 6B can be specifically realized by the structure shown in FIG. 6B.
- the charge and discharge protection circuit 220 is realized by the structure shown in FIG. 7A, the battery voltage sampling circuit in the charge and discharge protection circuit 220 And the reference voltage circuit can be specifically realized by the structure shown in FIG. 7B, which will not be repeated here.
- the terminal device 200 may adjust the undervoltage protection threshold of the battery 210 through the charge and discharge protection circuit 220 in the terminal device, and adjust the discharge cut-off voltage of the battery 210 through the processor 231.
- the terminal device 200 includes a processor 231 and a charging and discharging protection circuit 220.
- the processor 231 is configured to perform when the number of charge and discharge cycles of the battery 210 is greater than the set number, and the discharge current of the battery 210 is greater than the set current threshold.
- the charge and discharge protection circuit 220 is used to reduce the charge and discharge when the number of charge and discharge cycles of the battery 210 is greater than the set number and the discharge current of the battery 210 is greater than the set current threshold
- the under-voltage protection threshold of the battery 210 connected to the protection circuit 220 is shown in FIG. 11.
- the processor 231 is further used to: when the output voltage of the battery 210 is less than the discharge cut-off voltage of the battery 210, control the terminal device 200 to shut down and increase the discharge cut-off voltage of the battery 210; the charge-discharge protection circuit 220 is also used to: The output voltage of the battery 210 is less than the discharge cut-off voltage of the battery 210. After the terminal device 200 is shut down, the undervoltage protection threshold of the battery 210 is increased.
- the charge and discharge protection circuit 220 includes a power supply terminal VDD, a ground terminal VSS, a current sampling terminal IS, a controller 1110, and an undervoltage protection control circuit 820.
- the power supply terminal VDD is used to connect the positive electrode of the battery 210
- the ground terminal VDD is used to connect the negative electrode of the battery 210
- the controller 1110 is respectively connected to the undervoltage protection control circuit 1120 and the current sampling terminal IS. among them,
- the controller 1110 is used to count the number of charge and discharge cycles of the battery 210, and obtain the discharge current of the battery 210 through the current sampling terminal IS; when the number of charge and discharge cycles of the battery 210 is greater than the set number, and the discharge current of the battery 210 is greater than the set When the current threshold is reached, the first control signal is sent.
- the under-voltage protection control circuit 1120 is used to reduce the under-voltage protection threshold of the battery 210 under the control of the first control signal.
- controller 1110 may be implemented by software, that is, the controller 1110 may have implemented the functions of the controller 1110 described above by calling code instructions stored in a memory (not shown in the figure) in the charge and discharge protection circuit 220;
- the functions of the controller 1110 can also be implemented by hardware, for example, by a comparator.
- controller 1110 is also used to: when the output voltage of the battery 210 is less than the discharge cut-off voltage of the battery 210, after the terminal device 200 is shut down, send a second control signal; the under-voltage protection control circuit 1120 is also used to: Under the control of the signal, the under-voltage protection threshold of the battery 210 is increased.
- the charge and discharge protection circuit 220 also includes a discharge control terminal DO.
- the undervoltage protection control circuit 1120 is also used to compare the output voltage of the battery 210 with the undervoltage protection threshold of the battery 210, and output the DO through the discharge control terminal according to the comparison result.
- the third control signal is used to control the on or off of the discharge circuit of the battery 210. Wherein, when the output voltage of the battery 210 is greater than the undervoltage protection threshold of the battery 210, the third control signal is used to control the discharging circuit of the battery 210 to conduct. When the output voltage of the battery 210 is less than the undervoltage protection threshold of the battery 210, the third control signal The three control signals are used to control the discharge circuit of the battery 210 to be disconnected and perform under-voltage protection.
- the under-voltage protection control circuit 1120 can be specifically implemented by, but not limited to, the structure shown in FIG. 6A or FIG. 7A.
- the under-voltage protection The battery voltage sampling circuit and the reference voltage circuit in the control circuit 1120 can be specifically realized by the structure shown in FIG. 6B.
- the undervoltage protection control circuit 1120 is realized by the structure shown in FIG. 7A, the undervoltage protection control circuit 1120 The battery voltage sampling circuit and the reference voltage circuit can be specifically implemented by the structure shown in FIG. 7B, which will not be repeated here.
- the terminal device 200 reduces the undervoltage protection threshold of the battery 210 when the number of charge and discharge cycles of the battery 210 is greater than the set number, that is, when the battery 210 is aging and the discharge current of the battery 210 is greater than the set current threshold.
- the discharge cut-off voltage of the battery 210 enables the battery 210 to continue to discharge until the output voltage of the battery 210 is less than the reduced undervoltage protection threshold, so that before the undervoltage protection threshold of the battery 210 is adjusted, the battery 210 cannot be caused by aging.
- the continuously used power can be released, so that the terminal device 200 can continue to work, and the endurance of the terminal device 200 can be improved.
- an embodiment of the present application also provides a charge-discharge protection circuit 220 to adjust the under-voltage protection threshold of the battery in the scenario of battery aging.
- the charge-discharge protection circuit 220 includes a power terminal VDD, a ground terminal VSS, and an undervoltage protection threshold control terminal UVC.
- the power terminal VDD is used to connect to the positive electrode of the battery 210 and ground.
- the terminal VSS is used to connect the negative electrode of the battery 210, and the undervoltage protection threshold control terminal UVC is used to receive the first control signal, and the charge-discharge protection circuit is used when the number of charge and discharge cycles of the battery 210 is greater than the set number, and the battery 210 is discharged When the current is greater than the set current threshold, under the control of the first control signal, the undervoltage protection threshold of the battery 210 is reduced.
- the under-voltage protection threshold control terminal UVC is also used to receive a second control signal
- the charge-discharge protection circuit 220 is also used to: when the output voltage of the battery 210 is less than the discharge cut-off voltage of the battery 210, the second control signal controls Next, the under-voltage protection threshold of the battery 210 is increased.
- the charge and discharge protection circuit 220 further includes a discharge control terminal DO, which is used to output a third control signal; the charge and discharge protection circuit 220 is also used to: compare the output voltage of the battery with the undervoltage protection threshold of the battery, according to The comparison result outputs a third control signal, and the third control signal is used to control the on or off of the discharge loop of the battery.
- a discharge control terminal DO which is used to output a third control signal
- the charge and discharge protection circuit 220 is also used to: compare the output voltage of the battery with the undervoltage protection threshold of the battery, according to The comparison result outputs a third control signal, and the third control signal is used to control the on or off of the discharge loop of the battery.
- the charge-discharge protection circuit 220 may be implemented by, but not limited to, the structure shown in FIG. 6A or FIG. 7A.
- the charge-discharge protection circuit 220 When the charge-discharge protection circuit 220 is implemented by the structure shown in FIG. 6A, the charge-discharge protection circuit 220
- the battery voltage sampling circuit and the reference voltage circuit in FIG. 6B can be specifically realized by the structure shown in FIG. 6B.
- the charge and discharge protection circuit 220 is realized by the structure shown in FIG. 7A, the battery voltage sampling circuit in the charge and discharge protection circuit 220 And the reference voltage circuit can be specifically realized by the structure shown in FIG. 7B, which will not be repeated here.
- the charge-discharge protection circuit 220 includes a power terminal VDD, a ground terminal VSS, a current sampling terminal IS, a controller 1110, and an undervoltage protection control circuit 1120.
- the power terminal VDD is used for The positive electrode of the battery 210 is connected, and the ground terminal VDD is used to connect the negative electrode of the battery 210.
- the controller 1110 is respectively connected to the undervoltage protection control circuit 1120 and the current sampling terminal IS.
- the controller 1110 is used to count the number of charge and discharge cycles of the battery 210, and obtain the discharge current of the battery 210 through the current sampling terminal IS; when the number of charge and discharge cycles of the battery 210 is greater than the set number, and the discharge current of the battery 210 is greater than the set number
- the first control signal is sent; the under-voltage protection control circuit 1120 is used to reduce the under-voltage protection threshold of the battery 210 under the control of the first control signal.
- controller 1110 is also used to send a second control signal when the output voltage of the battery 210 is less than the discharge cut-off voltage of the battery 210; the undervoltage protection control circuit 1120 is also used to: under the control of the second control signal, The under-voltage protection threshold of the battery 210 is increased.
- the charge and discharge protection circuit 220 further includes a discharge control terminal DO, which is connected to the undervoltage protection control circuit 1120; the undervoltage protection control circuit 1120 is also used to compare the output voltage of the battery 210 with the undervoltage of the battery 210 For the protection threshold, a third control signal is output through the discharge control terminal DO according to the comparison result, and the third control signal is used to control the discharge circuit of the battery 210 to be turned on or off.
- the under-voltage protection control circuit 1120 can be specifically implemented by, but not limited to, the structure shown in FIG. 6A or FIG. 7A.
- the under-voltage protection The battery voltage sampling circuit and the reference voltage circuit in the control circuit 1120 can be specifically realized by the structure shown in FIG. 6B.
- the undervoltage protection control circuit 1120 is realized by the structure shown in FIG. 7A, the undervoltage protection control circuit 1120 The battery voltage sampling circuit and the reference voltage circuit can be specifically implemented by the structure shown in FIG. 7B, which will not be repeated here.
- the embodiment of the present application also provides a battery discharge control method, which is applied to the first charging and discharging protection circuit 220 described above, that is, when the battery 210 is aging, the charging and discharging protection circuit 220 adjusts the battery through a control signal received from the outside. 210 under-voltage protection threshold. As shown in Figure 12A, the method includes:
- S1201A Receive the first control signal when the number of charge and discharge cycles of the battery 210 connected to the charge protection circuit 220 is greater than the set number, and the discharge current of the battery 210 is greater than the set current threshold;
- the charge-discharge protection circuit 220 when the output voltage of the battery 210 is less than the discharge cut-off voltage of the battery 210, the charge-discharge protection circuit 220 also receives a second control signal, and under the control of the second control signal, increases the undervoltage protection threshold of the battery 210.
- the charge-discharge protection circuit 220 compares the output voltage of the battery 210 with the under-voltage protection threshold of the battery 210, and outputs a third control signal according to the comparison result.
- the third control signal is used to control the discharge circuit of the battery 210 to be disconnected or turned on.
- the third control signal is used to control the discharge circuit of the battery 210 to turn on, and when the output voltage of the battery 210 is less than the under-voltage protection threshold of the battery 210, the third control The signal is used to control the discharge circuit of the battery 210 to be disconnected.
- the embodiment of the present application also provides a battery discharge control method, which is applied to the second type of charging and discharging protection circuit 220 described above, that is, when the battery 210 is aging, the charging and discharging protection circuit 220 adjusts the undervoltage protection threshold of the battery 210 by itself.
- the method includes:
- S1201B Obtain the number of charge and discharge cycles of the battery 210 connected to the charge protection circuit 220 and the discharge current of the battery 210.
- the charge-discharge protection circuit 220 also increases the under-voltage protection threshold of the battery 210 when the output voltage of the battery 210 is less than the discharge cut-off voltage of the battery 210.
- the charge-discharge protection circuit 220 compares the output voltage of the battery 210 with the under-voltage protection threshold of the battery 210, and outputs a third control signal according to the comparison result.
- the third control signal is used to control the discharge circuit of the battery 210 to be disconnected or turned on.
- the charge-discharge protection circuit 220 reduces the under-voltage protection of the battery 210 when the number of charge-discharge cycles of the battery 210 is greater than the set number, that is, the battery 210 is aging and the discharge current of the battery 210 is greater than the set current threshold. Threshold, so that the battery 210 can continue to discharge until the output voltage of the battery 210 is less than the reduced under-voltage protection threshold, which in turn makes the battery 210 unusable due to aging before the under-voltage protection threshold of the battery 210 is adjusted It can be released and used by the electrical load connected to the charge and discharge protection circuit 220.
- a charge and discharge protection circuit includes: a power terminal (such as VDD in FIG. 5), a ground terminal (such as VSS in FIG. 5), and an undervoltage protection threshold control terminal (such as UVC in FIG. 5); wherein the power terminal is used Connected to the positive electrode of the battery, the ground terminal is used to connect the negative electrode of the battery, and the undervoltage protection threshold control terminal is used to receive the first control signal;
- a power terminal such as VDD in FIG. 5
- VSS such as VSS in FIG. 5
- UVC undervoltage protection threshold control terminal
- the charging and discharging protection circuit is configured to reduce the temperature under the control of the first control signal when the temperature of the battery is less than a set temperature threshold and the discharge current of the battery is greater than the set current threshold.
- the undervoltage protection threshold of the battery is configured to reduce the temperature under the control of the first control signal when the temperature of the battery is less than a set temperature threshold and the discharge current of the battery is greater than the set current threshold.
- the under-voltage protection threshold control terminal is also used to receive a second control signal
- the charging and discharging protection circuit is also used to increase the undervoltage protection threshold of the battery under the control of the second control signal when the output voltage of the battery is less than the discharge cut-off voltage of the battery.
- the charge and discharge protection circuit further includes a discharge control terminal (for example, DO), and the discharge control terminal is used to output a third control signal;
- a discharge control terminal for example, DO
- DO discharge control terminal
- the charging and discharging protection circuit is also used to compare the output voltage of the battery with the undervoltage protection threshold of the battery, and output the third control signal according to the comparison result, and the third control signal is used to control the battery
- the discharge circuit is turned on or off.
- a battery voltage sampling circuit a reference voltage circuit, and a comparator are included, wherein the battery sampling circuit is connected to the power supply terminal, the ground terminal, the undervoltage protection threshold control terminal, and the The first input terminal of the comparator is connected, the reference voltage circuit is connected with the second input terminal of the comparator, and the output terminal of the comparator is connected with the discharge control terminal;
- the battery voltage sampling circuit is configured to sample the output voltage of the battery, and increase the sampling voltage under the control of the first control signal
- the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery
- the comparator is used to compare the output voltage of the reference voltage circuit with the increased sampling voltage, and generate and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first voltage dividing resistor (for example, Ra in FIG. 6B), a second voltage dividing resistor (for example, Rb in FIG. 6B), and a switch resistor array, and the switch resistor array includes A plurality of branches connected in parallel, each branch including a third voltage dividing resistor and a switch connected in series with the third voltage dividing resistor;
- the first end of the first voltage dividing resistor is respectively connected to the power supply terminal and the first end of the switch resistor array, and the second end of the first voltage dividing resistor is respectively connected to the second voltage dividing resistor.
- the first end of the resistor, the second end of the switch resistor array, and the first input end of the comparator are connected, the control end of the switch in the switch resistor array is connected to the undervoltage protection threshold control end, and the The second terminal of the second voltage dividing resistor is connected to the ground terminal; the first control signal is used to control at least one switch in the switch resistor array to switch from an off state to an on state.
- the reference voltage circuit is a voltage source.
- a battery voltage sampling circuit a reference voltage circuit, and a comparator are included, wherein the battery sampling circuit is respectively connected to the power terminal, the ground terminal and the first input terminal of the comparator, The reference voltage circuit is respectively connected to the second input terminal of the comparator and the undervoltage protection threshold control terminal;
- the battery voltage sampling circuit is used to sample the output voltage of the battery
- the reference voltage circuit is used to reduce the output voltage of the reference voltage circuit under the control of the first control signal; the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery;
- the comparator is used to compare the output voltage of the battery voltage sampling circuit with the output voltage of the reference voltage circuit, and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first sampling resistor and a second sampling resistor; wherein, the first end of the first voltage dividing resistor is connected to the power source, and the first voltage dividing resistor The second end of the resistor is respectively connected to the first end of the second voltage dividing resistor and the first input end of the comparator, and the second end of the second voltage dividing resistor is connected to the ground terminal.
- the reference voltage circuit includes a plurality of branches connected in parallel, and each branch includes a voltage source and a switch connected in series with the voltage source;
- the first terminal of the reference voltage circuit is grounded, the second terminal of the reference voltage circuit is connected to the second input terminal of the comparator, and the control terminal of the switch in the reference voltage circuit is connected to the undervoltage
- the protection threshold control terminal is connected; the first control signal is used to control the first switch in the reference voltage circuit to switch from the on state to the off state, and to control the second switch in the reference voltage circuit from the off state Switching to the on state, the voltage of the voltage source connected in series with the first switch is greater than the voltage of the voltage source connected in series with the second switch.
- a terminal device wherein the terminal device includes a processor and a charge-discharge protection circuit, the charge-discharge protection circuit includes a power terminal, a ground terminal, and an undervoltage protection threshold control terminal; wherein the power terminal is used to connect a battery The ground terminal is used to connect to the negative terminal of the battery, and the undervoltage protection threshold control terminal is connected to the processor;
- the processor is configured to reduce the discharge cut-off voltage of the battery when the temperature of the battery is less than a set temperature threshold and the discharge current of the battery is greater than the set current threshold, and send a first control signal ;
- the charge and discharge protection circuit is configured to receive the first control signal through the undervoltage protection threshold control terminal, and under the control of the first control signal, reduce the undervoltage protection threshold of the battery.
- the processor is further configured to: when the output voltage of the battery is less than the discharge cut-off voltage of the battery, control the terminal device to shut down, increase the discharge cut-off voltage of the battery, and send Second control signal;
- the charging and discharging protection circuit is also used for increasing the undervoltage protection threshold of the battery under the control of the second control signal.
- the charge-discharge protection circuit further includes a discharge control terminal
- the charging and discharging protection circuit is also used to compare the output voltage of the battery with the undervoltage protection threshold of the battery, and output a third control signal through the discharge control terminal according to the comparison result, and the third control signal is used for The discharge circuit of the battery is controlled to be turned on or off.
- the charge and discharge protection circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator, wherein the battery sampling circuit is connected to the power supply terminal, the ground terminal, and the undervoltage protection circuit, respectively.
- the threshold control terminal is connected to the first input terminal of the comparator, the reference voltage circuit is connected to the second input terminal of the comparator, and the output terminal of the comparator is connected to the discharge control terminal;
- the battery voltage sampling circuit is configured to sample the output voltage of the battery, and increase the sampling voltage under the control of the first control signal
- the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery
- the comparator is used to compare the output voltage of the reference voltage circuit with the increased sampling voltage, and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first voltage dividing resistor, a second voltage dividing resistor, and a switch resistor array.
- the switch resistor array includes a plurality of branches connected in parallel with each other, and each branch includes a first A three voltage divider resistor and a switch connected in series with the third voltage divider resistor;
- the first end of the first voltage dividing resistor is respectively connected to the power supply terminal and the first end of the switch resistor array, and the second end of the first voltage dividing resistor is respectively connected to the second voltage dividing resistor.
- the first end of the resistor, the second end of the switch resistor array, and the first input end of the comparator are connected, the control end of the switch in the switch resistor array is connected to the undervoltage protection threshold control end, and the The second terminal of the second voltage dividing resistor is connected to the ground terminal; the first control signal is used to control at least one switch in the switch resistor array to switch from an off state to an on state.
- the reference voltage circuit is a voltage source.
- the charging and discharging protection circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator, wherein the battery sampling circuit is connected to the power supply terminal, the ground terminal, and the comparator, respectively.
- the first input terminal is connected
- the reference voltage circuit is respectively connected to the second input terminal of the comparator and the undervoltage protection threshold control terminal
- the output terminal of the comparator is connected to the discharge control terminal;
- the battery voltage sampling circuit is used to sample the voltage of the battery
- the reference voltage circuit is configured to reduce the output voltage of the reference voltage circuit under the control of the first control signal, and the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery;
- the comparator is used to compare the output voltage of the battery voltage sampling circuit with the output voltage of the reference voltage circuit, and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first sampling resistor and a second sampling resistor; wherein, the first end of the first voltage dividing resistor is connected to the power source, and the first voltage dividing resistor The second end of the resistor is respectively connected to the first end of the second voltage dividing resistor and the first input end of the comparator, and the second end of the second voltage dividing resistor is connected to the ground terminal.
- the reference voltage circuit includes a plurality of branches connected in parallel, and each branch includes a voltage source and a switch connected in series with the voltage source;
- the first terminal of the reference voltage circuit is grounded, the second terminal of the reference voltage circuit is connected to the second input terminal of the comparator, and the control terminal of the switch in the reference voltage circuit is connected to the undervoltage
- the protection threshold control terminal is connected; the first control signal is used to control the first switch in the reference voltage circuit to switch from the on state to the off state, and to control the second switch in the reference voltage circuit from the off state Switching to the on state, the voltage of the voltage source connected in series with the first switch is greater than the voltage of the voltage source connected in series with the second switch.
- a charging and discharging protection circuit which includes: a power terminal (such as VDD in Figure 8), a ground terminal (such as VSS in Figure 8), a temperature sampling terminal (such as TS in Figure 8), a current sampling terminal (such as Figure 8 IS), a controller and an undervoltage protection control circuit, the power terminal is used to connect the positive terminal of the battery, the ground terminal is used to connect the negative terminal of the battery, and the controller is connected to the undervoltage protection control circuit, The temperature sampling terminal and the current sampling terminal are connected;
- the controller is configured to obtain the temperature of the battery through the temperature sampling terminal, and the discharge current of the battery through the current sampling terminal; when the temperature of the battery is less than a set temperature threshold, and the Sending a first control signal when the discharge current of the battery is greater than the set current threshold;
- the undervoltage protection control circuit is used to reduce the undervoltage protection threshold of the battery under the control of the first control signal.
- the controller is further configured to: send a second control signal when the output voltage of the battery is less than the discharge cut-off voltage of the battery;
- the under-voltage protection control circuit is also used to increase the under-voltage protection threshold of the battery under the control of the second control signal.
- it further includes a discharge control terminal connected to the undervoltage protection control circuit;
- the under-voltage protection control circuit is also used to compare the output voltage of the battery with the under-voltage protection threshold of the battery, and output a third control signal through the discharge control terminal according to the comparison result, and the third control signal is used to control The discharge circuit of the battery is turned on or off.
- the undervoltage protection control circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator, wherein the battery sampling circuit is connected to the power supply terminal, the ground terminal, and the undervoltage
- the protection threshold control terminal is connected with the first input terminal of the comparator
- the reference voltage circuit is connected with the second input terminal of the comparator
- the output terminal of the comparator is connected with the discharge control terminal;
- the battery voltage sampling circuit is configured to sample the output voltage of the battery, and increase the sampling voltage under the control of the first control signal
- the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery
- the comparator is used to compare the output voltage of the reference voltage circuit with the increased sampling voltage, and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first voltage dividing resistor, a second voltage dividing resistor, and a switch resistor array.
- the switch resistor array includes a plurality of branches connected in parallel with each other, and each branch includes a first A three voltage divider resistor and a switch connected in series with the third voltage divider resistor;
- the first end of the first voltage dividing resistor is respectively connected to the power supply terminal and the first end of the switch resistor array, and the second end of the first voltage dividing resistor is respectively connected to the second voltage dividing resistor.
- the first end of the resistor, the second end of the switch resistor array, and the first input end of the comparator are connected, the control end of the switch in the switch resistor array is connected to the undervoltage protection threshold control end, and the The second terminal of the second voltage dividing resistor is connected to the ground terminal; the first control signal is used to control at least one switch in the switch resistor array to switch from an off state to an on state.
- the reference voltage circuit is a voltage source.
- the undervoltage protection control circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator, wherein the battery sampling circuit is connected to the power terminal, the ground terminal, and the comparator, respectively.
- the reference voltage circuit is connected to the second input terminal of the comparator and the undervoltage protection threshold control terminal respectively;
- the battery voltage sampling circuit is used to sample the output voltage of the battery
- the reference voltage circuit is used to reduce the output voltage of the reference voltage circuit under the control of the first control signal; the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery;
- the comparator is used to compare the output voltage of the reference voltage circuit with the output voltage of the battery voltage sampling circuit, and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first sampling resistor and a second sampling resistor; wherein, the first end of the first voltage dividing resistor is connected to the power source, and the first voltage dividing resistor The second end of the resistor is respectively connected to the first end of the second voltage dividing resistor and the first input end of the comparator, and the second end of the second voltage dividing resistor is connected to the ground terminal.
- the reference voltage circuit includes a plurality of branches connected in parallel, and each branch includes a voltage source and a switch connected in series with the voltage source;
- the first terminal of the reference voltage circuit is grounded, the second terminal of the reference voltage circuit is connected to the second input terminal of the comparator, and the control terminal of the switch in the reference voltage circuit is connected to the undervoltage
- the protection threshold control terminal is connected; the first control signal is used to control the first switch in the reference voltage circuit to switch from the on state to the off state, and to control the second switch in the reference voltage circuit from the off state Switching to the on state, the voltage of the voltage source connected in series with the first switch is greater than the voltage of the voltage source connected in series with the second switch.
- a terminal device wherein the terminal device includes a processor and a charge and discharge protection circuit
- the processor is configured to reduce the discharge cut-off voltage of the battery when the temperature of the battery connected to the charge-discharge protection circuit is less than a set temperature threshold, and the discharge current of the battery is greater than the set current threshold ;
- the charging and discharging protection circuit is used to reduce the undervoltage protection threshold of the battery when the temperature of the battery is less than a set temperature threshold and the discharge current of the battery is greater than the set current threshold.
- the processor is further configured to: when the output voltage of the battery is less than the discharge cut-off voltage of the battery, control the terminal device to shut down and increase the discharge cut-off voltage of the battery;
- the charge-discharge protection circuit is also used to increase the under-voltage protection threshold of the battery after the terminal device is shut down after the output voltage of the battery is less than the discharge cut-off voltage of the battery.
- the charging and discharging protection circuit includes a power terminal, a ground terminal, a temperature sampling terminal, a current sampling terminal, a controller, and an undervoltage protection control circuit; wherein, the power terminal is used to connect to the battery Positive pole, the ground terminal is used to connect the negative pole of the battery, and the controller is respectively connected to the undervoltage protection control circuit, the temperature sampling terminal and the current sampling terminal;
- the controller is configured to obtain the temperature of the battery through the temperature sampling terminal, and the discharge current of the battery through the current sampling terminal; when the temperature of the battery is less than a set temperature threshold, and the Sending a first control signal when the discharge current of the battery is greater than the set current threshold;
- the undervoltage protection control circuit is used to reduce the undervoltage protection threshold of the battery under the control of the first control signal.
- the charge-discharge protection circuit further includes a discharge control terminal
- the under-voltage protection control circuit is also used to compare the output voltage of the battery with the under-voltage protection threshold of the battery, and output a third control signal through the discharge control terminal according to the comparison result.
- the third control signal is used For controlling the discharging circuit of the battery to be turned on or off.
- the undervoltage protection control circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator, wherein the battery sampling circuit is connected to the power supply terminal, the ground terminal, and the undervoltage
- the protection threshold control terminal is connected with the first input terminal of the comparator
- the reference voltage circuit is connected with the second input terminal of the comparator
- the output terminal of the comparator is connected with the discharge control terminal;
- the battery voltage sampling circuit is configured to sample the output voltage of the battery, and increase the sampling voltage under the control of the first control signal
- the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery
- the comparator is used to compare the output voltage of the reference voltage circuit with the increased sampling voltage, and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first voltage dividing resistor, a second voltage dividing resistor, and a switch resistor array.
- the switch resistor array includes a plurality of branches connected in parallel with each other, and each branch includes a first A three voltage divider resistor and a switch connected in series with the third voltage divider resistor;
- the first end of the first voltage dividing resistor is respectively connected to the power supply terminal and the first end of the switch resistor array, and the second end of the first voltage dividing resistor is respectively connected to the second voltage dividing resistor.
- the first end of the resistor, the second end of the switch resistor array, and the first input end of the comparator are connected, the control end of the switch in the switch resistor array is connected to the undervoltage protection threshold control end, and the The second terminal of the second voltage dividing resistor is connected to the ground terminal; the first control signal is used to control at least one switch in the switch resistor array to switch from an off state to an on state.
- the reference voltage circuit is a voltage source.
- the undervoltage protection control circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator, wherein the battery sampling circuit is connected to the power terminal, the ground terminal, and the comparator, respectively.
- the reference voltage circuit is respectively connected to the second input terminal of the comparator and the undervoltage protection threshold control terminal, and the output terminal of the comparator is connected to the discharge control terminal;
- the battery voltage sampling circuit is used to sample the voltage of the battery
- the reference voltage circuit is configured to reduce the output voltage of the reference voltage circuit under the control of the first control signal, and the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery;
- the comparator is used to compare the output voltage of the reference voltage circuit with the output voltage of the battery voltage sampling circuit, and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first sampling resistor and a second sampling resistor; wherein, the first end of the first voltage dividing resistor is connected to the power source, and the first voltage dividing resistor The second end of the resistor is respectively connected to the first end of the second voltage dividing resistor and the first input end of the comparator, and the second end of the second voltage dividing resistor is connected to the ground terminal.
- the reference voltage circuit includes a plurality of branches connected in parallel, and each branch includes a voltage source and a switch connected in series with the voltage source;
- the first terminal of the reference voltage circuit is grounded, the second terminal of the reference voltage circuit is connected to the second input terminal of the comparator, and the control terminal of the switch in the reference voltage circuit is connected to the undervoltage
- the protection threshold control terminal is connected; the first control signal is used to control the first switch in the reference voltage circuit to switch from the on state to the off state, and to control the second switch in the reference voltage circuit from the off state Switching to the on state, the voltage of the voltage source connected in series with the first switch is greater than the voltage of the voltage source connected in series with the second switch.
- a battery discharge control method which includes:
- the terminal device detects the temperature of the battery in the terminal device and the discharge current of the battery
- the terminal device When the temperature of the battery is less than the set temperature threshold and the discharge current of the battery is greater than the set current threshold, the terminal device reduces the under-voltage protection threshold of the battery and the discharge cut-off voltage of the battery .
- it further includes:
- the terminal device controls the terminal device to shut down, and increases the under-voltage protection threshold of the battery and the discharge cut-off voltage of the battery.
- it further includes:
- the terminal device compares the output voltage of the battery with the undervoltage protection threshold of the battery, and controls the discharge loop of the battery to be turned on or off according to the comparison result.
- Embodiment 6 is a diagrammatic representation of Embodiment 6
- a charging and discharging protection circuit which includes: a power terminal, a ground terminal, and an undervoltage protection threshold control terminal; wherein the power terminal is used to connect the positive electrode of the battery, and the ground terminal is used to connect the negative electrode of the battery.
- the undervoltage protection threshold control terminal is used to receive the first control signal;
- the charge-discharge protection circuit is configured to reduce the charge and discharge cycles of the battery under the control of the first control signal when the number of charge-discharge cycles of the battery is greater than the set number and the discharge current of the battery is greater than the set current threshold. Lower the under-voltage protection threshold of the battery.
- the under-voltage protection threshold control terminal is also used to receive a second control signal
- the charging and discharging protection circuit is also used to increase the undervoltage protection threshold of the battery under the control of the second control signal when the output voltage of the battery is less than the discharge cut-off voltage of the battery.
- it further includes a discharge control terminal, where the discharge control terminal is used to output a third control signal;
- the charging and discharging protection circuit is also used to compare the output voltage of the battery with the undervoltage protection threshold of the battery, and output the third control signal according to the comparison result, and the third control signal is used to control the battery
- the discharge circuit is turned on or off.
- a battery voltage sampling circuit a reference voltage circuit, and a comparator are included, wherein the battery sampling circuit is connected to the power supply terminal, the ground terminal, the undervoltage protection threshold control terminal, and the The first input terminal of the comparator is connected, the reference voltage circuit is connected with the second input terminal of the comparator, and the output terminal of the comparator is connected with the discharge control terminal;
- the battery voltage sampling circuit is configured to sample the output voltage of the battery, and increase the sampling voltage under the control of the first control signal
- the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery
- the comparator is used to compare the output voltage of the reference voltage circuit with the increased sampling voltage, and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first voltage dividing resistor, a second voltage dividing resistor, and a switch resistor array.
- the switch resistor array includes a plurality of branches connected in parallel with each other, and each branch includes a first A three voltage divider resistor and a switch connected in series with the third voltage divider resistor;
- the first end of the first voltage dividing resistor is respectively connected to the power supply terminal and the first end of the switch resistor array, and the second end of the first voltage dividing resistor is respectively connected to the second voltage dividing resistor.
- the first end of the resistor, the second end of the switch resistor array, and the first input end of the comparator are connected, the control end of the switch in the switch resistor array is connected to the undervoltage protection threshold control end, and the The second terminal of the second voltage dividing resistor is connected to the ground terminal; the first control signal is used to control at least one switch in the switch resistor array to switch from an off state to an on state.
- the reference voltage circuit is a voltage source.
- a battery voltage sampling circuit a reference voltage circuit, and a comparator are included, wherein the battery sampling circuit is respectively connected to the power terminal, the ground terminal and the first input terminal of the comparator, The reference voltage circuit is respectively connected to the second input terminal of the comparator and the undervoltage protection threshold control terminal;
- the battery voltage sampling circuit is used to sample the output voltage of the battery
- the reference voltage circuit is used to reduce the output voltage of the reference voltage circuit under the control of the first control signal; the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery;
- the comparator is used to compare the output voltage of the reference voltage circuit with the output voltage of the battery voltage sampling circuit, and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first sampling resistor and a second sampling resistor; wherein, the first end of the first voltage dividing resistor is connected to the power source, and the first voltage dividing resistor The second end of the resistor is respectively connected to the first end of the second voltage dividing resistor and the first input end of the comparator, and the second end of the second voltage dividing resistor is connected to the ground terminal.
- the reference voltage circuit includes a plurality of branches connected in parallel, and each branch includes a voltage source and a switch connected in series with the voltage source;
- the first terminal of the reference voltage circuit is grounded, the second terminal of the reference voltage circuit is connected to the second input terminal of the comparator, and the control terminal of the switch in the reference voltage circuit is connected to the undervoltage
- the protection threshold control terminal is connected; the first control signal is used to control the first switch in the reference voltage circuit to switch from the on state to the off state, and to control the second switch in the reference voltage circuit from the off state Switching to the on state, the voltage of the voltage source connected in series with the first switch is greater than the voltage of the voltage source connected in series with the second switch.
- a terminal device wherein the terminal device includes a processor and a charge-discharge protection circuit, the charge-discharge protection circuit includes a power terminal, a ground terminal, and an undervoltage protection threshold control terminal; wherein the power terminal is used to connect a battery The ground terminal is used to connect to the negative terminal of the battery, and the undervoltage protection threshold control terminal is connected to the processor;
- the processor is configured to reduce the discharge cut-off voltage of the battery when the number of charge-discharge cycles of the battery is greater than the set number and the discharge current of the battery is greater than the set current threshold, and send a first control signal;
- the charge and discharge protection circuit is used to reduce the undervoltage protection threshold of the battery under the control of the first control signal.
- the processor is further configured to: when the output voltage of the battery is less than the discharge cut-off voltage of the battery, control the terminal device to shut down, increase the discharge cut-off voltage of the battery, and send Second control signal;
- the charging and discharging protection circuit is also used to increase the undervoltage protection threshold of the battery under the control of the second voltage signal.
- the charge-discharge protection circuit further includes a discharge control terminal
- the charging and discharging protection circuit is also used to compare the output voltage of the battery with the undervoltage protection threshold of the battery, and output a third control signal through the discharge control terminal according to the comparison result, and the third control signal is used for The discharge circuit of the battery is controlled to be turned on or off.
- the charge and discharge protection circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator, wherein the battery sampling circuit is connected to the power supply terminal, the ground terminal, and the undervoltage protection circuit, respectively.
- the threshold control terminal is connected to the first input terminal of the comparator, the reference voltage circuit is connected to the second input terminal of the comparator, and the output terminal of the comparator is connected to the discharge control terminal;
- the battery voltage sampling circuit is configured to sample the output voltage of the battery, and increase the sampling voltage under the control of the first control signal
- the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery
- the comparator is used to compare the output voltage of the reference voltage circuit with the increased sampling voltage, and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first voltage dividing resistor, a second voltage dividing resistor, and a switch resistor array.
- the switch resistor array includes a plurality of branches connected in parallel with each other, and each branch includes a first A three voltage divider resistor and a switch connected in series with the third voltage divider resistor;
- the first end of the first voltage dividing resistor is respectively connected to the power supply terminal and the first end of the switch resistor array, and the second end of the first voltage dividing resistor is respectively connected to the second voltage dividing resistor.
- the first end of the resistor, the second end of the switch resistor array, and the first input end of the comparator are connected, the control end of the switch in the switch resistor array is connected to the undervoltage protection threshold control end, and the The second terminal of the second voltage dividing resistor is connected to the ground terminal; the first control signal is used to control at least one switch in the switch resistor array to switch from an off state to an on state.
- the reference voltage circuit is a voltage source.
- the charging and discharging protection circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator, wherein the battery sampling circuit is connected to the power supply terminal, the ground terminal, and the comparator, respectively.
- the first input terminal is connected
- the reference voltage circuit is respectively connected to the second input terminal of the comparator and the undervoltage protection threshold control terminal
- the output terminal of the comparator is connected to the discharge control terminal;
- the battery voltage sampling circuit is used to sample the voltage of the battery
- the reference voltage circuit is configured to reduce the output voltage produced by the reference voltage circuit under the control of the first control signal, and the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery ;
- the comparator is used to compare the output voltage of the reference voltage circuit with the output voltage of the battery voltage sampling circuit, and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first sampling resistor and a second sampling resistor; wherein, the first end of the first voltage dividing resistor is connected to the power source, and the first voltage dividing resistor The second end of the resistor is respectively connected to the first end of the second voltage dividing resistor and the first input end of the comparator, and the second end of the second voltage dividing resistor is connected to the ground terminal.
- the reference voltage circuit includes a plurality of branches connected in parallel, and each branch includes a voltage source and a switch connected in series with the voltage source;
- the first terminal of the reference voltage circuit is grounded, the second terminal of the reference voltage circuit is connected to the second input terminal of the comparator, and the control terminal of the switch in the reference voltage circuit is connected to the undervoltage
- the protection threshold control terminal is connected; the first control signal is used to control the first switch in the reference voltage circuit to switch from the on state to the off state, and to control the second switch in the reference voltage circuit from the off state Switching to the on state, the voltage of the voltage source connected in series with the first switch is greater than the voltage of the voltage source connected in series with the second switch.
- Embodiment 8 is a diagrammatic representation of Embodiment 8
- a charging and discharging protection circuit comprising: a power terminal, a ground terminal, a current sampling terminal, a controller, and an undervoltage protection control circuit.
- the power terminal is used to connect the positive electrode of the battery
- the ground terminal is used to connect to the The negative electrode of the battery
- the controller is respectively connected to the undervoltage protection control circuit and the current sampling terminal;
- the controller is configured to count the number of charge and discharge cycles of the battery, and obtain the discharge current of the battery through the current sampling terminal; when the number of charge and discharge cycles of the battery is greater than a set number, and the battery’s Sending a first control signal when the discharge current is greater than the set current threshold;
- the undervoltage protection control circuit is used to reduce the undervoltage protection threshold of the battery under the control of the first control signal.
- the controller is further configured to send a second control signal when the output voltage of the battery is less than the discharge cut-off voltage of the battery;
- the under-voltage protection control circuit is also used to increase the under-voltage protection threshold of the battery under the control of the second control signal.
- it further includes a discharge control terminal connected to the undervoltage protection control circuit;
- the under-voltage protection control circuit is also used to: compare the output voltage of the battery with the under-voltage protection threshold of the battery, output the third control signal through the discharge control terminal according to the comparison result, and the third control The signal is used to control the on or off of the discharge circuit of the battery.
- the undervoltage protection control circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator, wherein the battery sampling circuit is connected to the power supply terminal, the ground terminal, and the undervoltage
- the protection threshold control terminal is connected with the first input terminal of the comparator
- the reference voltage circuit is connected with the second input terminal of the comparator
- the output terminal of the comparator is connected with the discharge control terminal;
- the battery voltage sampling circuit is configured to sample the output voltage of the battery, and increase the sampling voltage under the control of the first control signal
- the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery
- the comparator is used to compare the output voltage of the reference voltage circuit with the increased sampling voltage, and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first voltage dividing resistor, a second voltage dividing resistor, and a switch resistor array.
- the switch resistor array includes a plurality of branches connected in parallel with each other, and each branch includes a first A three voltage divider resistor and a switch connected in series with the third voltage divider resistor;
- the first end of the first voltage dividing resistor is respectively connected to the power supply terminal and the first end of the switch resistor array, and the second end of the first voltage dividing resistor is respectively connected to the second voltage dividing resistor.
- the first end of the resistor, the second end of the switch resistor array, and the first input end of the comparator are connected, the control end of the switch in the switch resistor array is connected to the undervoltage protection threshold control end, and the The second terminal of the second voltage dividing resistor is connected to the ground terminal; the first control signal is used to control at least one switch in the switch resistor array to switch from an off state to an on state.
- the reference voltage circuit is a voltage source.
- the undervoltage protection control circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator, wherein the battery sampling circuit is connected to the power terminal, the ground terminal, and the comparator, respectively.
- the reference voltage circuit is connected to the second input terminal of the comparator and the undervoltage protection threshold control terminal respectively;
- the battery voltage sampling circuit is used to sample the output voltage of the battery
- the reference voltage circuit is used to reduce the output voltage of the reference voltage circuit under the control of the first control signal; the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery;
- the comparator is used to compare the output voltage of the reference voltage circuit with the output voltage of the battery voltage sampling circuit, and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first sampling resistor and a second sampling resistor; wherein, the first end of the first voltage dividing resistor is connected to the power source, and the first voltage dividing resistor The second end of the resistor is respectively connected to the first end of the second voltage dividing resistor and the first input end of the comparator, and the second end of the second voltage dividing resistor is connected to the ground terminal.
- the reference voltage circuit includes a plurality of branches connected in parallel with each other, and each branch includes a voltage source and a switch connected in series with the voltage source;
- the first terminal of the reference voltage circuit is grounded, the second terminal of the reference voltage circuit is connected to the second input terminal of the comparator, and the control terminal of the switch in the reference voltage circuit is connected to the undervoltage
- the protection threshold control terminal is connected; the first control signal is used to control the first switch in the reference voltage circuit to switch from the on state to the off state, and to control the second switch in the reference voltage circuit from the off state Switching to the on state, the voltage of the voltage source connected in series with the first switch is greater than the voltage of the voltage source connected in series with the second switch.
- a terminal device wherein the terminal device includes a processor and a charge and discharge protection circuit
- the processor is configured to reduce the discharge cut-off of the battery when the number of charge and discharge cycles of the battery connected to the charge and discharge protection circuit is greater than a set number, and the discharge current of the battery is greater than a set current threshold Voltage;
- the charge-discharge protection circuit is used to reduce the under-voltage protection threshold of the battery when the number of charge-discharge cycles of the battery is greater than the set number, and the discharge current of the battery is greater than the set current threshold.
- the processor is further configured to: when the output voltage of the battery is less than the discharge cut-off voltage of the battery, control the terminal device to shut down and increase the discharge cut-off voltage of the battery;
- the charge-discharge protection circuit is also used to increase the under-voltage protection threshold of the battery after the terminal device is shut down after the output voltage of the battery is less than the discharge cut-off voltage of the battery.
- the charge and discharge protection circuit includes a power terminal, a ground terminal, a current sampling terminal, a controller, and an undervoltage protection control circuit; wherein the power terminal is used to connect to the positive electrode of the battery, and the The ground terminal is used to connect the negative electrode of the battery, and the controller is respectively connected to the undervoltage protection control circuit and the current sampling terminal;
- the controller is configured to count the number of charge and discharge cycles of the battery, and obtain the discharge current of the battery through the current sampling terminal; when the number of charge and discharge cycles of the battery is greater than a set number, and the battery’s Sending a first control signal when the discharge current is greater than the set current threshold;
- the undervoltage protection control circuit is used to reduce the undervoltage protection threshold of the battery under the control of the first control signal.
- the charge-discharge protection circuit further includes a discharge control terminal
- the charging and discharging protection circuit is also used to compare the output voltage of the battery with the undervoltage protection threshold of the battery, and output a third control signal through the discharge control terminal according to the comparison result, and the third control signal is used for The discharge circuit of the battery is controlled to be turned on or off.
- the undervoltage protection control circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator, wherein the battery sampling circuit is connected to the power supply terminal, the ground terminal, and the undervoltage
- the protection threshold control terminal is connected with the first input terminal of the comparator
- the reference voltage circuit is connected with the second input terminal of the comparator
- the output terminal of the comparator is connected with the discharge control terminal;
- the battery voltage sampling circuit is configured to sample the output voltage of the battery, and increase the sampling voltage under the control of the first control signal
- the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery
- the comparator is used to compare the output voltage of the reference voltage circuit with the increased sampling voltage, and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first voltage dividing resistor, a second voltage dividing resistor, and a switch resistor array.
- the switch resistor array includes a plurality of branches connected in parallel with each other, and each branch includes a first A three voltage divider resistor and a switch connected in series with the third voltage divider resistor;
- the first end of the first voltage dividing resistor is respectively connected to the power supply terminal and the first end of the switch resistor array, and the second end of the first voltage dividing resistor is respectively connected to the second voltage dividing resistor.
- the first end of the resistor, the second end of the switch resistor array, and the first input end of the comparator are connected, the control end of the switch in the switch resistor array is connected to the undervoltage protection threshold control end, and the The second terminal of the second voltage dividing resistor is connected to the ground terminal; the first control signal is used to control at least one switch in the switch resistor array to switch from an off state to an on state.
- the reference voltage circuit is a voltage source.
- the undervoltage protection control circuit includes a battery voltage sampling circuit, a reference voltage circuit, and a comparator, wherein the battery sampling circuit is connected to the power terminal, the ground terminal, and the comparator, respectively.
- the reference voltage circuit is respectively connected to the second input terminal of the comparator and the undervoltage protection threshold control terminal, and the output terminal of the comparator is connected to the discharge control terminal;
- the battery voltage sampling circuit is used to sample the voltage of the battery
- the reference voltage circuit is configured to reduce the output voltage of the reference voltage circuit under the control of the first control signal, and the output voltage of the reference voltage circuit is used to characterize the undervoltage protection threshold of the battery;
- the comparator is used to compare the output voltage of the reference voltage circuit with the output voltage of the battery voltage sampling circuit, and output the third control signal according to the comparison result.
- the battery voltage sampling circuit includes a first sampling resistor and a second sampling resistor; wherein, the first end of the first voltage dividing resistor is connected to the power source, and the first voltage dividing resistor The second end of the resistor is respectively connected to the first end of the second voltage dividing resistor and the first input end of the comparator, and the second end of the second voltage dividing resistor is connected to the ground terminal.
- the reference voltage circuit includes a plurality of branches connected in parallel, and each branch includes a voltage source and a switch connected in series with the voltage source;
- the first terminal of the reference voltage circuit is grounded, the second terminal of the reference voltage circuit is connected to the second input terminal of the comparator, and the control terminal of the switch in the reference voltage circuit is connected to the undervoltage
- the protection threshold control terminal is connected; the first control signal is used to control the first switch in the reference voltage circuit to switch from the on state to the off state, and to control the second switch in the reference voltage circuit from the off state Switching to the on state, the voltage of the voltage source connected in series with the first switch is greater than the voltage of the voltage source connected in series with the second switch.
- a battery discharge control method which includes:
- the terminal device detects the discharge current of the battery in the terminal device, and counts the number of charge and discharge cycles of the battery;
- the terminal device When the number of charge and discharge cycles of the battery is greater than the set number of times, and the discharge current of the battery is greater than the set current threshold, the terminal device reduces the undervoltage protection threshold of the battery and the discharge cut-off of the battery Voltage.
- it further includes:
- the terminal device controls the terminal device to shut down, and increases the under-voltage protection threshold of the battery and the discharge cut-off voltage of the battery.
- it further includes:
- the terminal device compares the output voltage of the battery with the undervoltage protection threshold of the battery, and controls the discharge loop of the battery to be turned on or off according to the comparison result.
- These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
- the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
- These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
- the instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
本申请提供了一种充放电保护电路、终端设备及电池放电控制方法,涉及充电领域,以解决低温环境下电池的电量无法得到有效利用问题。该充放电保护电路包括电源端、接地端以及欠电压保护阈值控制端,电源端用于连接电池的正极,接地端用于连接电池的负极,欠电压保护阈值控制端用于接收第一控制信号。充放电保护电路用于当电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,在第一控制信号的控制下,减小电池的欠电压保护阈值。
Description
相关申请的交叉引用
本申请要求在2019年07月31日提交中国专利局、申请号为201910703892.4、申请名称为“一种充放电保护电路、终端设备及电池放电控制方法”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请涉及电池管理技术领域,尤其涉及一种充放电保护电路、终端设备及电池放电控制方法。
电池的性能稳定可靠,可以长时间稳定供电,并且电池结构简单,充放电操作简便易行,被广泛地应用于各种便携式终端设备中,如手机、平板电脑、相机以及笔记本电脑等等。在放电的过程中,电池的输出电压会逐渐减小,当电池的输出电压小于一定阈值时会造成电池的损坏,甚至发生***起火等安全问题。为了保证电池的使用安全以及寿命,电池在实际应用中通常会连接充放电保护电路,充放电保护电路通常具有欠电压保护(过放电保护)功能,在电池的输出电压小于设定的欠电压保护阈值时,断开电池的放电回路。
连接在电池上的充放电保护电路的欠电压保护功能可能会失效,因此为了进一步提高电池的安全性以及寿命,终端设备中还设置了放电截止电压,当电池的输出电压小于放电截止电压时,断开电池上连接的用电负载,其中,放电截止电压大于欠电压保护阈值。
但是,目前电池的欠电压保护阈值以及放电截止电压均是以电池在常温下的性能为依据设定的。相较于常温下电池的输出电压到放电截止电压时电池的电量,在电池工作在低温环境下,电池的输出电压达到常温下所设定的电池的放电截止电压时,电池还具有较多的电量,但是电池上连接的用电负载无法继续从电池中获取电能,导致电池的电量无法得到有效利用。
发明内容
本申请提供了一种充放电保护电路、终端设备及电池放电控制方法,以解决低温环境下电池的电量无法得到有效利用问题。
第一方面,本申请提供了一种充放电保护电路,该充放电保护电路包括电源端、接地端以及欠电压保护阈值控制端,电源端用于连接电池的正极,接地端用于连接电池的负极,欠电压保护阈值控制端用于接收第一控制信号。充放电保护电路,用于当电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,在第一控制信号的控制下,减小电池的欠电压保护阈值。
通过上述方案,充放电保护电路在电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值,使得电池能够继续放电,直到电池的输出电压小于减小后的欠电压保护阈值,进而使得在电池的欠电压保护阈值调整之前, 电池中由于低温导致的无法继续使用的电量能够被释放出来,被充放电保护电路连接的用电负载利用。
一个可能的实施方式中,欠电压保护阈值控制端还用于接收第二控制信号,充放电保护电路还用于:当电池的输出电压小于电池的放电截止电压时,在第二控制信号的控制下,增大电池的欠电压保护阈值。
当电池的输出电压小于电池的放电截止电压时,充放电保护电路连接的用电负载无法工作,但是电池还会继续放电,因此,当电池的输出电压小于电池的放电截止电压时,增大电池的欠电压保护阈值以防止电池发生损坏,保证电池的使用寿命以及使用安全。如果不增大电池的欠电压保护阈值,在无法及时充电的场景下可能会损坏电池。
一个可能的实施方式中,充放电保护电路还包括放电控制端,放电控制端用于输出第三控制信号。充放电保护电路还用于:比较电池的输出电压与电池的欠电压保护阈值,根据比较结果输出第三控制信号,第三控制信号用于控制所述电池的放电回路导通或断开。其中,当电池的输出电压大于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路导通;当电池的输出电压小于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路断开,进行欠电压保护。
一个可能的实施方式中,充放电保护电路包括电池电压采样电路、参考电压电路和比较器,电池采样电路分别与电源端、接地端、欠电压保护阈值控制端以及比较器的第一输入端连接,参考电压电路与比较器的第二输入端连接,比较器的输出端与放电控制端连接。其中,电池电压采样电路,用于对电池的输出电压进行采样,在第一控制信号的控制下,增大采样电压;参考电压电路的输出电压用于表征电池的欠电压保护阈值;比较器,用于比较参考电压电路的输出电压与增大后的采样电压,根据比较结果生输第三控制信号。
一个可能的实施方式中,电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与第三分压电阻串联的开关。其中,第一分压电阻的第一端分别与电源端以及开关电阻阵列的第一端连接,第一分压电阻的第二端分别与第二分压电阻的第一端、开关电阻阵列的第二端以及比较器的第一输入端连接,开关电阻阵列中开关的控制端与欠电压保护阈值控制端连接,第二分压电阻的第二端与接地端连接;第一控制信号用于控制开关电阻阵列中的至少一个开关从断开状态切换为导通状态。
一个可能的实施方式中,参考电压电路为电压源。
一个可能的实施方式中,充放电保护电路包括电池电压采样电路、参考电压电路和比较器,电池采样电路分别与电源端、接地端以及比较器的第一输入端连接,参考电压电路分别与比较器的第二输入端以及欠电压保护阈值控制端连接。其中,电池电压采样电路,用于对电池的输出电压进行采样;参考电压电路,用于在第一控制信号的控制下,减小参考电压电路的输出电压,参考电压电路的输出电压用于表征电池的欠电压保护阈值;比较器,用于比较电池电压采样电路的输出电压与参考电压电路的输出电压,根据比较结果输出第三控制信号。
一个可能的实施方式中,电池电压采样电路包括第一采样电阻和第二采样电阻;其中,第一分压电阻的第一端与电源端连接,第一分压电阻的第二端分别与第二分压电阻的第一端以及比较器的第一输入端连接,第二分压电阻的第二端与接地端连接。
一个可能的实施方式中,参考电压电路包括多个相互并联的支路,每个支路包括电压 源以及与电压源串联的开关。其中,参考电压电路的第一端接地,参考电压电路的第二端与比较器的第二输入端连接,参考电压电路中的开关的控制端与欠电压保护阈值控制端连接;第一控制信号用于控制参考电压电路中的第一开关从导通状态切换到断开状态,控制参考电压电路中的第二开关从断开状态切换到导通状态,第一开关串联的电压源的电压大于第二开关串联的电压源的电压。
第二方面本申请提供了一种终端设备,该终端设备包括:处理器和充放电保护电路,充放电保护电路包括电源端、接地端以及欠电压保护阈值控制端,电源端用于连接电池的正极,接地端用于连接电池的负极,欠电压保护阈值控制端与处理器连接。其中,处理器,用于在电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,减小电池的放电截止电压,发送第一控制信号;充放电保护电路,用于通过欠电压保护阈值控制端接收第一控制信号,在第一控制信号的控制下,减小电池的欠电压保护阈值。
通过上述方案,终端设备在电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值以及电池的放电截止电压,使得电池能够继续放电,直到电池的输出电压小于减小后的欠电压保护阈值,进而使得在电池的欠电压保护阈值调整之前,电池中由于低温导致的无法继续使用的电量能够被释放出来,进而使得终端设备可以继续工作,提高终端设备的续航能力。
一个可能的实施方式中,处理器还用于:在电池的输出电压小于电池的放电截止电压时,控制终端设备关机,增大电池的放电截止电压,发送第二控制信号;充放电保护电路还用于:在第二控制信号的控制下,增大电池的欠电压保护阈值。
终端设备关机后还会消耗电池中的电能,在终端设备关机时增大电池的欠电压保护阈值以及放电截止电压,能够防止电池发生损坏,保证电池的使用寿命以及使用安全。如果不增大电池的欠电压保护阈值以及电池的放电截止电压,在无法及时充电的场景下可能会损坏电池。
一个可能的实施方式中,充放电保护电路还包括放电控制端。充放电保护电路还用于:比较电池的输出电压与所述电池的欠电压保护阈值,根据比较结果通过放电控制端输出第三控制信号,第三控制信号用于控制电池的放电回路导通或断开。其中,当电池的输出电压大于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路导通;当电池的输出电压小于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路断开,进行欠电压保护。
一个可能的实施方式中,充放电保护电路包括电池电压采样电路、参考电压电路和比较器,电池采样电路分别与电源端、接地端、欠电压保护阈值控制端以及比较器的第一输入端连接,参考电压电路与比较器的第二输入端连接,比较器的输出端与放电控制端连接。其中,电池电压采样电路,用于对电池的输出电压进行采样,在第一控制信号的控制下,增大采样电压;参考电压电路的输出电压用于表征电池的欠电压保护阈值;比较器,用于比较参考电压电路的输出电压与增大后的采样电压,根据比较结果输出第三控制信号。
一个可能的实施方式中,电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与第三分压电阻串联的开关。其中,第一分压电阻的第一端分别与电源端以及开关电阻阵列的第一端连接,第一分压电阻的第二端分别与第二分压电阻的第一端、开关电阻阵列的第二端以及比较器的第一输入端连接,开关电阻阵列中开关的控制端与欠电压保护阈值控制端 连接,第二分压电阻的第二端与接地端连接;第一控制信号用于控制开关电阻阵列中的至少一个开关从断开状态切换到导通状态。
一个可能的实施方式中,参考电压电路为电压源。
一个可能的实施方式中,充放电保护电路包括电池电压采样电路、参考电压电路和比较器,电池采样电路分别与电源端、接地端以及比较器的第一输入端连接,参考电压电路分别与比较器的第二输入端以及欠电压保护阈值控制端连接,比较器的输出端与所述放电控制端连接。其中,电池电压采样电路,用于对电池的电压进行采样;参考电压电路,用于在第一控制信号的控制下,减小参考电压电路的输出电压,参考电压电路的输出电压用于表征电池的欠电压保护阈值;比较器,用于比较电池电压采样电路的输出电压与参考电压电路的输出电压,根据比较结果输出第三控制信号。
一个可能的实施方式中,电池电压采样电路包括第一采样电阻和第二采样电阻。其中,第一分压电阻的第一端与电源端连接,第一分压电阻的第二端分别与第二分压电阻的第一端以及比较器的第一输入端连接,第二分压电阻的第二端与接地端连接。
一个可能的实施方式中,参考电压电路包括多个相互并联的支路,每个支路包括电压源以及与电压源串联的开关。其中,参考电压电路的第一端接地,参考电压电路的第二端与比较器的第二输入端连接,参考电压电路中的开关的控制端与欠电压保护阈值控制端连接;述第一控制信号用于控制参考电压电路中的第一开关从导通状态切换到断开状态,控制参考电压电路中的第二开关从断开状态切换到导通状态,第一开关串联的电压源的电压大于第二开关串联的电压源的电压。
第三方面,本申请还提供了一种充放电保护电路,该充放电保护电路包括电源端、接地端、温度采样端、电流采样端、控制器和欠电压保护控制电路,电源端用于连接电池的正极,接地端用于连接电池的负极,控制器分别与欠电压保护控制电路、温度采样端以及电流采样端连接。其中,控制器,用于通过温度采样端获取电池的温度,通过电流采样端获取电池的放电电流;当电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,发送第一控制信号;欠电压保护控制电路,用于在第一控制信号的控制下,减小电池的欠电压保护阈值。
通过上述方案,充放电保护电路在电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值,使得电池能够继续放电,直到电池的输出电压小于减小后的欠电压保护阈值,进而使得在电池的欠电压保护阈值调整之前,电池中由于低温导致的无法继续使用的电量能够被释放出来,被充放电保护电路连接的用电负载利用。
一个可能的实施方式中,控制器还用于:当电池的输出电压小于电池的放电截止电压时,发送第二控制信号;欠电压保护控制电路还用于:在第二控制信号的控制下,增大电池的欠电压保护阈值。
当电池的输出电压小于电池的放电截止电压时,充放电保护电路连接的用电负载无法工作,但是电池还会继续放电,因此,当电池的输出电压小于电池的放电截止电压时,增大电池的欠电压保护阈值以防止电池发生损坏,保证电池的使用寿命以及使用安全。如果不增大电池的欠电压保护阈值,在无法及时充电的场景下可能会损坏电池。
一个可能的实施方式中,充放电保护电路还包括放电控制端,放电控制端与欠电压保护控制电路连接。欠电压保护控制电路还用于:比较电池的输出电压与电池的欠电压保护 阈值,根据比较结果通过放电控制端输出第三控制信号,第三控制信号用于控制所述电池的放电回路导通或断开。其中,当电池的输出电压大于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路导通;当电池的输出电压小于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路断开,进行欠电压保护。
一个可能的实施方式中,欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,电池采样电路分别与电源端、接地端、欠电压保护阈值控制端以及比较器的第一输入端连接,参考电压电路与所述比较器的第二输入端连接,比较器的输出端与放电控制端连接。其中,电池电压采样电路,用于对电池的输出电压进行采样,在第一控制信号的控制下,增大采样电压;参考电压电路的输出电压用于表征电池的欠电压保护阈值;比较器,用于比较参考电压电路的输出电压与增大后的采样电压,根据比较结果输出第三控制信号。
一个可能的实施方式中,电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与第三分压电阻串联的开关。其中,第一分压电阻的第一端分别与述电源端以及开关电阻阵列的第一端连接,第一分压电阻的第二端分别与第二分压电阻的第一端、开关电阻阵列的第二端以及比较器的第一输入端连接,开关电阻阵列中开关的控制端与欠电压保护阈值控制端连接,第二分压电阻的第二端与接地端连接;第一控制信号用于控制开关电阻阵列中的至少一个开关从断开状态切换到导通状态。
一个可能的实施方式中,参考电压电路为电压源。
一个可能的实施方式中,欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,电池采样电路分别与电源端、接地端以及比较器的第一输入端连接,参考电压电路分别与比较器的第二输入端以及欠电压保护阈值控制端连接。其中,电池电压采样电路,用于对电池的输出电压进行采样;参考电压电路,用于在第一控制信号的控制下,减小参考电压电路的输出电压;参考电压电路的输出电压用于表征电池的欠电压保护阈值;比较器,用于比较参考电压电路的输出电压与电池电压采样电路的输出电压,根据比较结果输出第三控制信号。
一个可能的实施方式中,电池电压采样电路包括第一采样电阻和第二采样电阻。其中,第一分压电阻的第一端与电源端连接,第一分压电阻的第二端分别与第二分压电阻的第一端以及比较器的第一输入端连接,第二分压电阻的第二端与接地端连接。
一个可能的实施方式中,参考电压电路包括多个相互并联的支路,每个支路包括电压源以及与所述电压源串联的开关。其中,参考电压电路的第一端接地,参考电压电路的第二端与比较器的第二输入端连接,参考电压电路中的开关的控制端与欠电压保护阈值控制端连接;第一控制信号用于控制参考电压电路中的第一开关从导通状态切换到断开状态,控制参考电压电路中的第二开关从断开状态切换到导通状态,第一开关串联的电压源的电压大于第二开关串联的电压源的电压。
第四方面,本申请还提供了一种终端设备,该终端设备包括:处理器和充放电保护电路。其中,处理器,用于在充放电保护电路连接的电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,减小电池的放电截止电压;充放电保护电路,用于在电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值。
通过上述方案,终端设备在电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值以及电池的放电截止电压,使得电池能够继续放电,直到电池的输出电压小于减小后的欠电压保护阈值,进而使得在电池的欠电压保护阈值调整之前,电池中由于低温导致的无法继续使用的电量能够被释放出来,进而使得终端设备可以继续工作,提高终端设备的续航能力。
一个可能的实施方式中,处理器还用于:在电池的输出电压小于电池的放电截止电压时,控制终端设备关机,增大电池的放电截止电压;充放电保护电路还用于:在电池的输出电压小于电池的放电截止电压,终端设备关机后,增大电池的欠电压保护阈值。
终端设备关机后还会消耗电池中的电能,在终端设备关机时增大电池的欠电压保护阈值以及放电截止电压,能够防止电池发生损坏,保证电池的使用寿命以及使用安全。如果不增大电池的欠电压保护阈值以及电池的放电截止电压,在无法及时充电的场景下可能会损坏电池。
一个可能的实施方式中,充放电保护电路包括电源端、接地端、温度采样端、电流采样端、控制器和欠电压保护控制电路,电源端用于连接电池的正极,接地端用于连接电池的负极,控制器分别与欠电压保护控制电路、温度采样端以及电流采样端连接。其中,控制器,用于通过温度采样端获取电池的温度,通过电流采样端获取电池的放电电流;当电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,发送第一控制信号;欠电压保护控制电路,用于在第一控制信号的控制下,减小电池的欠电压保护阈值。
一个可能的实施方式中,充放电保护电路还包括放电控制端。欠电压保护控制电路还用于:比较电池的输出电压与电池的欠电压保护阈值,根据比较结果通过放电控制端输出第三控制信号,第三控制信号用于控制电池的放电回路导通或断开。
一个可能的实施方式中,欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,电池采样电路分别与电源端、接地端、欠电压保护阈值控制端以及比较器的第一输入端连接,参考电压电路与比较器的第二输入端连接,比较器的输出端与放电控制端连接。其中,电池电压采样电路,用于对电池的输出电压进行采样,在第一控制信号的控制下,增大采样电压;参考电压电路的输出电压用于表征电池的欠电压保护阈值;比较器,用于比较参考电压电路的输出电压与增大后的采样电压,根据比较结果输出第三控制信号。
一个可能的实施方式中,电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与第三分压电阻串联的开关。其中,第一分压电阻的第一端分别与电源端以及开关电阻阵列的第一端连接,第一分压电阻的第二端分别与第二分压电阻的第一端、开关电阻阵列的第二端以及比较器的第一输入端连接,开关电阻阵列中开关的控制端与欠电压保护阈值控制端连接,第二分压电阻的第二端与接地端连接;第一控制信号用于控制开关电阻阵列中的至少一个开关从断开状态切换为导通状态。
一个可能的实施方式中,参考电压电路为电压源。
一个可能的实施方式中,欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,电池采样电路分别与电源端、接地端以及比较器的第一输入端连接,参考电压电路分别与比较器的第二输入端以及欠电压保护阈值控制端连接,比较器的输出端与放电控制端连接。其中,电池电压采样电路,用于对电池的电压进行采样;参考电压电路,用于在第一控制信号的控制下,减小参考电压电路的输出电压,参考电压电路的输出电压用 于表征电池的欠电压保护阈值;比较器,用于比较参考电压电路的输出电压与电池电压采样电路的输出电压,根据比较结果输出第三控制信号。
一个可能的实施方式中,电池电压采样电路包括第一采样电阻和第二采样电阻;其中,第一分压电阻的第一端与电源端连接,第一分压电阻的第二端分别与第二分压电阻的第一端以及比较器的第一输入端连接,第二分压电阻的第二端与接地端连接。
一个可能的实施方式中,参考电压电路包括多个相互并联的支路,每个支路包括电压源以及与电压源串联的开关。其中,参考电压电路的第一端接地,参考电压电路的第二端与比较器的第二输入端连接,参考电压电路中的开关的控制端与欠电压保护阈值控制端连接;第一控制信号用于控制参考电压电路中的第一开关从导通状态切换到断开状态,控制参考电压电路中的第二开关从断开状态切换到导通状态,第一开关串联的电压源的电压大于第二开关串联的电压源的电压。
第五方面,本申请还提供了一种电池放电控制方法,该方法包括:终端设备检测终端设备中电池的温度以及电池的放电电流,在电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值以及电池的放电截止电压。
通过上述方法,终端设备在电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值以及电池的放电截止电压,使得电池能够继续放电,直到电池的输出电压小于减小后的欠电压保护阈值,进而使得在电池的欠电压保护阈值调整之前,电池中由于低温导致的无法继续使用的电量能够被释放出来,进而使得终端设备可以继续工作,提高终端设备的续航能力。
一个可能的实施方式中,述终端设备在电池的输出电压小于电池的放电截止电压时,控制终端设备关机,增大电池的欠电压保护阈值以及电池的放电截止电压。
终端设备关机后还会消耗电池中的电能,在终端设备关机时增大电池的欠电压保护阈值以及放电截止电压,能够防止电池发生损坏,保证电池的使用寿命以及使用安全。如果不增大电池的欠电压保护阈值以及电池的放电截止电压,在无法及时充电的场景下可能会损坏电池。
一个可能的实施方式中,终端设备还比较电池的输出电压与电池的欠电压保护阈值,根据比较结果控制电池的放电回路导通或断开。其中,当电池的输出电压大于电池的欠电压保护阈值时,终端设备控制电池的放电回路导通;当电池的输出电压小于电池的欠电压保护阈值时,终端设备控制电池的放电回路断开,进行欠电压保护。
第六方面,本申请还提供了一种电池放电控制方法,该方法包括:充放电保护电路在充电保护电路连接的电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,接收第一控制信号,在所述第一控制信号的控制下,减小电池的欠电压保护阈值。
通过上述方法,充放电保护电路在电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值,使得电池能够继续放电,直到电池的输出电压小于减小后的欠电压保护阈值,进而使得在电池的欠电压保护阈值调整之前,电池中由于低温导致的无法继续使用的电量能够被释放出来,被充放电保护电路连接的用电负载利用。
一个可能的实施方式中,充放电保护电路在电池的输出电压小于电池的放电截止电压时,还接收第二控制信号,在第二控制信号的控制下,增大电池的欠电压保护阈值。
当电池的输出电压小于电池的放电截止电压时,充放电保护电路连接的用电负载无法 工作,但是电池还会继续放电,因此,当电池的输出电压小于电池的放电截止电压时,增大电池的欠电压保护阈值以防止电池发生损坏,保证电池的使用寿命以及使用安全。如果不增大电池的欠电压保护阈值,在无法及时充电的场景下可能会损坏电池。
一个可能的实施方式中,充放电保护电路还比较电池的输出电压和电池的欠电压保护阈值,根据比较结果输出第三控制信号,第三控制信号用于控制所述电池的放电回路断开或导通。其中,当电池的输出电压大于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路导通;当电池的输出电压小于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路断开,进行欠电压保护。
第七方面,本申请还提供了一种电池放电控制方法,该方法包括:充放电保护电路获取充电保护电路连接的电池的温度和电池的放电电流,在电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值。
通过上述方法,充放电保护电路在电池的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值,使得电池能够继续放电,直到电池的输出电压小于减小后的欠电压保护阈值,进而使得在电池的欠电压保护阈值调整之前,电池中由于低温导致的无法继续使用的电量能够被释放出来,被充放电保护电路连接的用电负载利用。
一个可能的实施方式中,充放电保护电路在电池的输出电压小于电池的放电截止电压时,还增大电池的欠电压保护阈值。
当电池的输出电压小于电池的放电截止电压时,充放电保护电路连接的用电负载无法工作,但是电池还会继续放电,因此,当电池的输出电压小于电池的放电截止电压时,增大电池的欠电压保护阈值以防止电池发生损坏,保证电池的使用寿命以及使用安全。如果不增大电池的欠电压保护阈值,在无法及时充电的场景下可能会损坏电池。
一个可能的实施方式中,充放电保护电路还比较电池的输出电压和电池的欠电压保护阈值,根据比较结果输出第三控制信号,第三控制信号用于控制所述电池的放电回路断开或导通。其中,当电池的输出电压大于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路导通;当电池的输出电压小于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路断开,进行欠电压保护。
第八方面,本申请还提供你够了一种充放电保护电路,该充放电保护电路包括电源端、接地端以及欠电压保护阈值控制端,电源端用于连接电池的正极,接地端用于连接电池的负极,欠电压保护阈值控制端用于接收第一控制信号。充放电保护电路,用于当电池的充放电循环次数大于设定次数,且电池的放电电流大于设定的电流阈值时,在第一控制信号的控制下,减小电池的欠电压保护阈值。
通过上述方案,充放电保护电路在电池的充放电循环次数大于设定次数,即电池发生老化,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值,使得电池能够继续放电,直到电池的输出电压小于减小后的欠电压保护阈值,进而使得在电池的欠电压保护阈值调整之前,电池中由于老化导致的无法继续使用的电量能够被释放出来,被充放电保护电路连接的用电负载利用。
一个可能的实施方式中,欠电压保护阈值控制端还用于接收第二控制信号。充放电保护电路还用于:当电池的输出电压小于电池的放电截止电压时,在第二控制信号的控制下,增大电池的欠电压保护阈值。
当电池的输出电压小于电池的放电截止电压时,充放电保护电路连接的用电负载无法工作,但是电池还会继续放电,因此,当电池的输出电压小于电池的放电截止电压时,增大电池的欠电压保护阈值以防止电池发生损坏,保证电池的使用寿命以及使用安全。如果不增大电池的欠电压保护阈值,在无法及时充电的场景下可能会损坏电池。
一个可能的实施方式中,充放电保护电路还包括放电控制端,放电控制端用于输出第三控制信号。充放电保护电路还用于:比较电池的输出电压与电池的欠电压保护阈值,根据比较结果输出第三控制信号,第三控制信号用于控制电池的放电回路导通或断开。其中,当电池的输出电压大于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路导通;当电池的输出电压小于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路断开,进行欠电压保护。
一个可能的实施方式中,充放电保护电路包括电池电压采样电路、参考电压电路和比较器,电池采样电路分别与电源端、接地端、欠电压保护阈值控制端以及比较器的第一输入端连接,参考电压电路与比较器的第二输入端连接,比较器的输出端与放电控制端连接。其中,电池电压采样电路,用于对电池的输出电压进行采样,在第一控制信号的控制下,增大采样电压;参考电压电路的输出电压用于表征电池的欠电压保护阈值;比较器,用于比较参考电压电路的输出电压与增大后的采样电压,根据比较结果输出第三控制信号。
一个可能的实施方式中,电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与第三分压电阻串联的开关。其中,第一分压电阻的第一端分别与电源端以及开关电阻阵列的第一端连接,第一分压电阻的第二端分别与第二分压电阻的第一端、开关电阻阵列的第二端以及比较器的第一输入端连接,开关电阻阵列中开关的控制端与欠电压保护阈值控制端连接,第二分压电阻的第二端与接地端连接;第一控制信号用于控制开关电阻阵列中的至少一个开关从断开状态切换为导通状态。
一个可能的实施方式中,参考电压电路为电压源。
一个可能的实施方式中,充放电保护电路包括电池电压采样电路、参考电压电路和比较器,电池采样电路分别与电源端、接地端以及比较器的第一输入端连接,参考电压电路分别与比较器的第二输入端以及欠电压保护阈值控制端连接。其中,电池电压采样电路,用于对电池的输出电压进行采样;参考电压电路,用于在第一控制信号的控制下,减小参考电压电路的输出电压;参考电压电路的输出电压用于表征电池的欠电压保护阈值;比较器,用于比较参考电压电路的输出电压与池电压采样电路的输出电压,根据比较结果输第三控制信号。
一个可能的实施方式中,电池电压采样电路包括第一采样电阻和第二采样电阻。其中,第一分压电阻的第一端与电源端连接,第一分压电阻的第二端分别与第二分压电阻的第一端以及比较器的第一输入端连接,第二分压电阻的第二端与接地端连接。
一个可能的实施方式中,参考电压电路包括多个相互并联的支路,每个支路包括电压源以及与电压源串联的开关。其中,参考电压电路的第一端接地,参考电压电路的第二端与比较器的第二输入端连接,参考电压电路中的开关的控制端与欠电压保护阈值控制端连接;第一控制信号用于控制参考电压电路中的第一开关从导通状态切换到断开状态,控制参考电压电路中的第二开关从断开状态切换到导通状态,第一开关串联的电压源的电压大于第二开关串联的电压源的电压。
第九方面,本申请还提供了一种终端设备,该终端设备包括处理器和充放电保护电路,充放电保护电路包括电源端、接地端以及欠电压保护阈值控制端,电源端用于连接电池的正极,接地端用于连接电池的负极,欠电压保护阈值控制端与处理器连接。其中,处理器,用于当电池的充放电循环次数大于设定次数,且电池的放电电流大于设定的电流阈值时,减小电池的放电截止电压,发送第一控制信号;充放电保护电路,用于在第一控制信号的控制下,减小电池的欠电压保护阈值。
通过上述方案,终端设备在电池的充放电循环次数大于设定次数,即电池发生老化,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值以及电池的放电截止电压,使得电池能够继续放电,直到电池的输出电压小于减小后的欠电压保护阈值,使得在电池的欠电压保护阈值调整之前,电池中由于老化导致的无法继续使用的电量能够被释放出来,进而使得终端设备可以继续工作,提高终端设备的续航能力。
一个可能的实施方式中,处理器还用于:在电池的输出电压小于电池的放电截止电压时,控制终端设备关机,增大电池的放电截止电压,发送第二控制信号;充放电保护电路还用于:在第二电压信号的控制下,增大电池的欠电压保护阈值。
终端设备关机后还会消耗电池中的电能,在终端设备关机时增大电池的欠电压保护阈值以及放电截止电压,能够防止电池发生损坏,保证电池的使用寿命以及使用安全。如果不增大电池的欠电压保护阈值以及电池的放电截止电压,在无法及时充电的场景下可能会损坏电池。
一个可能的实施方式中,充放电保护电路还包括放电控制端。充放电保护电路还用于:比较电池的输出电压与电池的欠电压保护阈值,根据比较结果通过放电控制端输出第三控制信号,第三控制信号用于控制电池的放电回路导通或断开。其中,当电池的输出电压大于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路导通;当电池的输出电压小于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路断开,进行欠电压保护。
一个可能的实施方式中,充放电保护电路包括电池电压采样电路、参考电压电路和比较器,电池采样电路分别与电源端、接地端、欠电压保护阈值控制端以及比较器的第一输入端连接,参考电压电路与所述比较器的第二输入端连接,比较器的输出端与放电控制端连接。其中,电池电压采样电路,用于对电池的输出电压进行采样,在第一控制信号的控制下,增大采样电压;参考电压电路的输出电压用于表征电池的欠电压保护阈值;比较器,用于比较参考电压电路的输出电压与增大后的采样电压,根据比较结果输出第三控制信号。
一个可能的实施方式中,电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与第三分压电阻串联的开关。其中,第一分压电阻的第一端分别与电源端以及所述开关电阻阵列的第一端连接,第一分压电阻的第二端分别与第二分压电阻的第一端、开关电阻阵列的第二端以及比较器的第一输入端连接,开关电阻阵列中开关的控制端与欠电压保护阈值控制端连接,第二分压电阻的第二端与接地端连接;第一控制信号用于控制开关电阻阵列中的至少一个开关从断开状态切换到导通状态。
一个可能的实施方式中,参考电压电路为电压源。
一个可能的实施方式中,充放电保护电路包括电池电压采样电路、参考电压电路和比较器,电池采样电路分别与电源端、接地端以及比较器的第一输入端连接,参考电压电路 分别与比较器的第二输入端以及欠电压保护阈值控制端连接,比较器的输出端与放电控制端连接。其中,电池电压采样电路,用于对电池的电压进行采样;参考电压电路,用于在第一控制信号的控制下,减小参考电压电路产的输出电压,参考电压电路的输出电压用于表征电池的欠电压保护阈值;比较器,用于比较参考电压电路的输出电压与电池电压采样电路的输出电压,根据比较结果输出第三控制信号。
一个可能的实施方式中,电池电压采样电路包括第一采样电阻和第二采样电阻;其中,第一分压电阻的第一端与电源端连接,第一分压电阻的第二端分别与第二分压电阻的第一端以及比较器的第一输入端连接,第二分压电阻的第二端与接地端连接。
一个可能的实施方式中,参考电压电路包括多个相互并联的支路,每个支路包括电压源以及与电压源串联的开关。其中,参考电压电路的第一端接地,参考电压电路的第二端与比较器的第二输入端连接,参考电压电路中开关的控制端与欠电压保护阈值控制端连接;第一控制信号用于控制参考电压电路中的第一开关从导通状态切换到断开状态,控制参考电压电路中的第二开关从断开状态切换到导通状态,第一开关串联的电压源的电压大于第二开关串联的电压源的电压。
第十方面,本申请还提供了一种充放电保护电路,该充放电保护电路包括:电源端、接地端、电流采样端、控制器和欠电压保护控制电路,电源端用于连接电池的正极,接地端用于连接电池的负极,控制器分别与欠电压保护控制电路以及电流采样端连接。其中,控制器,用于统计电池的充放电循环次数,通过电流采样端获取所述电池的放电电流;当电池的充放电循环次数大于设定次数,且电池的放电电流大于设定的电流阈值时,发送第一控制信号;欠电压保护控制电路,用于在第一控制信号的控制下,减小电池的欠电压保护阈值。
通过上述方案,充放电保护电路在电池的充放电循环次数大于设定次数,即电池发生老化,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值,使得电池能够继续放电,直到电池的输出电压小于减小后的欠电压保护阈值,进而使得在电池的欠电压保护阈值调整之前,电池中由于老化导致的无法继续使用的电量能够被释放出来,被充放电保护电路连接的用电负载利用。
一个可能的实施方式中,控制器还用于:当电池的输出电压小于电池的放电截止电压时,发送第二控制信号;欠电压保护控制电路还用于:在第二控制信号的控制下,增大电池的欠电压保护阈值。
当电池的输出电压小于电池的放电截止电压时,充放电保护电路连接的用电负载无法工作,但是电池还会继续放电,因此,当电池的输出电压小于电池的放电截止电压时,增大电池的欠电压保护阈值以防止电池发生损坏,保证电池的使用寿命以及使用安全。如果不增大电池的欠电压保护阈值,在无法及时充电的场景下可能会损坏电池。
一个可能的实施方式中,充放电保护电路还包括放电控制端,放电控制端与欠电压保护控制电路连接。欠电压保护控制电路还用于:比较电池的输出电压与电池的欠电压保护阈值,根据比较结果通过放电控制端输出第三控制信号,第三控制信号用于控制电池的放电回路导通或断开。其中,当电池的输出电压大于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路导通;当电池的输出电压小于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路断开,进行欠电压保护。
一个可能的实施方式中,欠电压保护控制电路包括电池电压采样电路、参考电压电路 和比较器,电池采样电路分别与电源端、接地端、欠电压保护阈值控制端以及比较器的第一输入端连接,参考电压电路与比较器的第二输入端连接,比较器的输出端与放电控制端连接。其中,电池电压采样电路,用于对电池的输出电压进行采样,在第一控制信号的控制下,增大采样电压;参考电压电路的输出电压用于表征电池的欠电压保护阈值;比较器,用于比较参考电压电路的输出电压与增大后的采样电压,根据比较结果输出第三控制信号。
一个可能的实施方式中,电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与第三分压电阻串联的开关。其中,第一分压电阻的第一端分别与电源端以及开关电阻阵列的第一端连接,第一分压电阻的第二端分别与第二分压电阻的第一端、开关电阻阵列的第二端以及比较器的第一输入端连接,开关电阻阵列中开关的控制端与欠电压保护阈值控制端连接,第二分压电阻的第二端与接地端连接;第一控制信号用于控制开关电阻阵列中的至少一个开关从断开状态切换到导通状态。
一个可能的实施方式中,参考电压电路为电压源。
一个可能的实施方式中,欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,电池采样电路分别与电源端、接地端以及比较器的第一输入端连接,参考电压电路分别与比较器的第二输入端以及欠电压保护阈值控制端连接。其中,电池电压采样电路,用于对电池的输出电压进行采样;参考电压电路,用于在第一控制信号的控制下,减小参考电压电路的输出电压,参考电压电路的输出电压用于表征电池的欠电压保护阈值;比较器,用于比较参考电压电路的输出电压与电池电压采样电路的输出电压,根据比较结果输出第三控制信号。
一个可能的实施方式中,电池电压采样电路包括第一采样电阻和第二采样电阻。其中,第一分压电阻的第一端与电源端连接,第一分压电阻的第二端分别与第二分压电阻的第一端以及比较器的第一输入端连接,第二分压电阻的第二端与接地端连接。
一个可能的实施方式中,参考电压电路包括多个相互并联的支路,每个支路包括电压源以及与电压源串联的开关。其中,参考电压电路的第一端接地,参考电压电路的第二端与比较器的第二输入端连接,参考电压电路中的开关的控制端与欠电压保护阈值控制端连接;第一控制信号用于控制参考电压电路中的第一开关从导通状态切换到断开状态,控制参考电压电路中的第二开关从断开状态切换到导通状态,第一开关串联的电压源的电压大于第二开关串联的电压源的电压。
第十一方面,本申请还提供了一种终端设备,该终端设备包括处理器和充放电保护电路。其中,处理器,用于在充放电保护电路连接的电池的充放电循环次数大于设定次数,且电池的放电电流大于设定的电流阈值时,减小电池的放电截止电压;充放电保护电路,用于在电池的充放电循环次数大于设定次数,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值。
通过上述方案,终端设备在电池的充放电循环次数大于设定次数,即电池发生老化,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值以及电池的放电截止电压,使得电池能够继续放电,直到电池的输出电压小于减小后的欠电压保护阈值,使得在电池的欠电压保护阈值调整之前,电池中由于老化导致的无法继续使用的电量能够被释放出来,进而使得终端设备可以继续工作,提高终端设备的续航能力。
一个可能的实施方式中,处理器还用于:在电池的输出电压小于电池的放电截止电压 时,控制终端设备关机,增大所述电池的放电截止电压;充放电保护电路还用于:在电池的输出电压小于电池的放电截止电压,终端设备关机后,增大电池的欠电压保护阈值。
终端设备关机后还会消耗电池中的电能,在终端设备关机时增大电池的欠电压保护阈值以及放电截止电压,能够防止电池发生损坏,保证电池的使用寿命以及使用安全。如果不增大电池的欠电压保护阈值以及电池的放电截止电压,在无法及时充电的场景下可能会损坏电池。
一个可能的实施方式中,充放电保护电路包括电源端、接地端、电流采样端、控制器和欠电压保护控制电路,电源端用于连接电池的正极,接地端用于连接电池的负极,控制器分别与欠电压保护控制电路以及电流采样端连接。其中,控制器,用于统计电池的充放电循环次数,通过电流采样端获取所述电池的放电电流;当电池的充放电循环次数大于设定次数,且电池的放电电流大于设定的电流阈值时,发送第一控制信号;欠电压保护控制电路,用于在第一控制信号的控制下,减小电池的欠电压保护阈值。
一个可能的实施方式中,充放电保护电路还包括放电控制端。充放电保护电路还用于:比较电池的输出电压与所述电池的欠电压保护阈值,根据比较结果通过放电控制端输出第三控制信号,第三控制信号用于控制电池的放电回路导通或断开。其中,当电池的输出电压大于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路导通;当电池的输出电压小于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路断开,进行欠电压保护。
一个可能的实施方式中,欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,电池采样电路分别与电源端、接地端、欠电压保护阈值控制端以及比较器的第一输入端连接,参考电压电路与比较器的第二输入端连接,比较器的输出端与放电控制端连接。其中,电池电压采样电路,用于对电池的输出电压进行采样,在第一控制信号的控制下,增大采样电压;参考电压电路的输出电压用于表征电池的欠电压保护阈值;比较器,用于比较参考电压电路的输出电压与增大后的采样电压,根据比较结果输出第三控制信号。
一个可能的实施方式中,电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与第三分压电阻串联的开关。其中,第一分压电阻的第一端分别与电源端以及开关电阻阵列的第一端连接,第一分压电阻的第二端分别与第二分压电阻的第一端、开关电阻阵列的第二端以及比较器的第一输入端连接,开关电阻阵列中开关的控制端与欠电压保护阈值控制端连接,第二分压电阻的第二端与所述接地端连接;第一控制信号用于控制开关电阻阵列中的至少一个开关从断开状态切换为导通状态。
一个可能的实施方式中,参考电压电路为电压源。
一个可能的实施方式中,欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,电池采样电路分别与电源端、接地端以及比较器的第一输入端连接,参考电压电路分别与比较器的第二输入端以及欠电压保护阈值控制端连接,比较器的输出端与放电控制端连接。其中,电池电压采样电路,用于对电池的电压进行采样;参考电压电路,用于在第一控制信号的控制下,减小参考电压电路的输出电压,参考电压电路的输出电压用于表征电池的欠电压保护阈值;比较器,用于比较参考电压电路的输出电压与电池电压采样电路的输出电压,根据比较结果输出第三控制信号。
一个可能的实施方式中,电池电压采样电路包括第一采样电阻和第二采样电阻。其中, 第一分压电阻的第一端与电源端连接,第一分压电阻的第二端分别与第二分压电阻的第一端以及比较器的第一输入端连接,第二分压电阻的第二端与接地端连接。
一个可能的实施方式中,考电压电路包括多个相互并联的支路,每个支路包括电压源以及与电压源串联的开关。其中,参考电压电路的第一端接地,参考电压电路的第二端与比较器的第二输入端连接,参考电压电路中的开关的控制端与欠电压保护阈值控制端连接;第一控制信号用于控制参考电压电路中的第一开关从导通状态切换到断开状态,控制参考电压电路中的第二开关从断开状态切换到导通状态,第一开关串联的电压源的电压大于第二开关串联的电压源的电压。
第十二方面,本申请还提供了一种电池放电控制方法,该方法包括:终端设备检测终端设备中电池的放电电流,并统计电池的充放电循环次数,在电池的充放电循环次数大于设定次数,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值以及电池的放电截止电压。
通过上述方法,终端设备在电池的充放电循环次数大于设定次数,即电池发生老化,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值以及电池的放电截止电压,使得电池能够继续放电,直到电池的输出电压小于减小后的欠电压保护阈值,使得在电池的欠电压保护阈值调整之前,电池中由于老化导致的无法继续使用的电量能够被释放出来,进而使得终端设备可以继续工作,提高终端设备的续航能力。
一个可能的实施方式中,终端设备在电池的输出电压小于电池的放电截止电压时,控制终端设备关机,增大电池的欠电压保护阈值以及电池的放电截止电压。
终端设备关机后还会消耗电池中的电能,在终端设备关机时增大电池的欠电压保护阈值以及放电截止电压,能够防止电池发生损坏,保证电池的使用寿命以及使用安全。如果不增大电池的欠电压保护阈值以及电池的放电截止电压,在无法及时充电的场景下可能会损坏电池。
一个可能的实施方式中,终端设备比较电池的输出电压与电池的欠电压保护阈值,根据比较结果,控制电池的放电回路导通或断开。其中,当电池的输出电压大于电池的欠电压保护阈值时,终端设备控制电池的放电回路导通;当电池的输出电压小于电池的欠电压保护阈值时,终端设备控制电池的放电回路断开,进行欠电压保护。
第十三方面,本申请还提供了一种电池放电控制方法,该方法包括:充放电保护电路在充电保护电路连接的电池的充放电循环次数大于设定次数,且电池的放电电流大于设定的电流阈值时,接收第一控制信号,在第一控制信号的控制下,减小电池的欠电压保护阈值。
通过上述方法,充放电保护电路在电池的充放电循环次数大于设定次数,即电池发生老化,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值,使得电池能够继续放电,直到电池的输出电压小于减小后的欠电压保护阈值,进而使得在电池的欠电压保护阈值调整之前,电池中由于老化导致的无法继续使用的电量能够被释放出来,被充放电保护电路连接的用电负载利用。
一个可能的实施方式中,充放电保护电路在电池的输出电压小于电池的放电截止电压时,接收第二控制信号,在第二控制信号的控制下,增大电池的欠电压保护阈值,以防止电池发生损坏,保证电池的使用寿命以及使用安全。
一个可能的实施方式中,充放电保护电路比较电池的输出电压和电池的欠电压保护阈 值,根据比较结果输出第三控制信号,第三控制信号用于控制所述电池的放电回路断开或导通。其中,当电池的输出电压大于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路导通;当电池的输出电压小于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路断开,进行欠电压保护。
第十四方面,本申请还提供了一种电池放电控制方法,该方法包括:充放电保护电路获取充电保护电路连接的电池的充放电循环次数和电池的放电电流,在电池的充放电循环次数大于设定次数,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值。
通过上述方法,充放电保护电路在电池的充放电循环次数大于设定次数,即电池发生老化,且电池的放电电流大于设定的电流阈值时,减小电池的欠电压保护阈值,使得电池能够继续放电,直到电池的输出电压小于减小后的欠电压保护阈值,进而使得在电池的欠电压保护阈值调整之前,电池中由于老化导致的无法继续使用的电量能够被释放出来,被充放电保护电路连接的用电负载利用。
一个可能的实施方式中,充放电保护电路在电池的输出电压小于电池的放电截止电压时,增大电池的欠电压保护阈值。
当电池的输出电压小于电池的放电截止电压时,充放电保护电路连接的用电负载无法工作,但是电池还会继续放电,因此,当电池的输出电压小于电池的放电截止电压时,增大电池的欠电压保护阈值以防止电池发生损坏,保证电池的使用寿命以及使用安全。如果不增大电池的欠电压保护阈值,在无法及时充电的场景下可能会损坏电池。
一个可能的实施方式中,充放电保护电路比较电池的输出电压和电池的欠电压保护阈值,根据比较结果输出第三控制信号,第三控制信号用于控制电池的放电回路断开或导通。其中,当电池的输出电压大于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路导通;当电池的输出电压小于电池的欠电压保护阈值时,第三控制信号用于控制电池的放电回路断开,进行欠电压保护。
可以理解的,上面技术方案中的连接,可以为直接连接,也可以为间接连接。
图1为本申请实施例提供的一种电池的等效电路示意图;
图2为本申请实施例提供的一种终端设备的结构示意图之一;
图3为本申请实施例提供的一种充放电保护芯片的结构示意图;
图4为本申请实施例提供的第一种电池放电控制方法的流程示意图;
图5为本申请实施例提供的一种终端设备的结构示意图之二;
图6A为本申请实施例提供的一种充放电保护电路的结构示意图之一;
图6B为本申请实施例提供的一种充放电保护电路的结构示意图之二;
图7A为本申请实施例提供的一种充放电保护电路的结构示意图之三;
图7B为本申请实施例提供的一种充放电保护电路的结构示意图之四;
图8为本申请实施例提供的一种终端设备的结构示意图之三;
图9A为本申请实施例提供的第二种电池放电控制方法的流程示意图;
图9B为本申请实施例提供的第三种电池放电控制方法的流程示意图;
图10为本申请实施例提供的第四种电池放电控制方法的流程示意图;
图11为本申请实施例提供的一种终端设备的结构示意图之四;
图12A为本申请实施例提供的第五种电池放电控制方法的流程示意图;
图12B为本申请实施例提供的第六种电池放电控制方法的流程示意图。
在放电的过程中,电池的输出电压会逐渐减小,当电池的输出电压小于一定阈值时会造成电池的损坏,甚至发生***起火等安全问题。为了保证电池的使用安全以及寿命。因此,需要设置放电截止电压以及欠电压保护阈值对电池进行放电保护。
如图1所示,电池的等效模型为电压源与电阻串联的结构,其中,电压源的电压为电池的开路电压,电阻为电池的内阻。电池的输出电压U
o=V
DD-IR,其中,V
DD为电池的开路电压,I为电池的放电电流,R为电池的内阻。相较于常温环境,在低温环境下,电池的内阻R增大,进而导致电池的输出电压变小。但是,目前电池的欠电压保护阈值以及放电截止电压均是以电池在常温下的性能为依据设定的。相较于常温下电池的输出电压到放电截止电压时电池的电量,在电池工作在低温环境下,电池的输出电压达到常温下所设定的电池的放电截止电压时,电池还具有较多的电量,但是电池上连接的用电负载无法继续从电池中获取电能,导致电池的电量无法得到有效利用。例如,冬天在室外用手机拍照时,尽管手机还有一定的电量,但是手机会发生突然关机的情况。
为了解决上述问题,本申请实施例提供了一种充放电保护电路、终端设备及电池放电控制方法。其中,方法和装置可以是基于同一发明构思的,由于方法及装置解决问题的原理相似,因此方法与装置的实施可以相互参见,重复之处不再赘述。
另外,需要理解的是,在本申请实施例的描述中,多个,是指两个或两个以上;“第一”、“第二”等词汇,仅用于区分描述的目的,而不能理解为指示或暗示相对重要性,也不能理解为指示或暗示顺序。
图2为本申请实施例所应用的一种终端设备的硬件架构图,该终端设备可以是手机、平板电脑以及笔记本电脑等通过电池进行供电的设备,如图2所示,该终端设备200包括电池210、充放电保护电路220以及用电负载230。其中,充放电保护电路220也可以单片集成形成充放电保护芯片。
其中,电池210用于存储以及释放电能。充放电保护电路220用于保护电池210,可以防止电池210发生过充电和/或过放电。例如,如图3所示,充放电保护电路220包括电源端VDD和接地端VSS、电流采样端IS、放电控制端DO,其中,电源端VDD分别与电容C1的一端以及电阻R1的一端连接,电阻R1的另一端与电池的正极连接,接地端VSS分别与电容C1的另一端、采样电阻R2的一端以及电池的负极连接,电流采样端IS分别与电流采样电阻R2的另一端以及金属氧化物场效应管(metal oxide semiconductor,MOS)M1的源极连接,放电控制端DO与MOS管M1的栅极连接,充电控制端CO与MOS管M2的栅极连接,MOS管M1的漏极与MOS管M2的漏极连接。当电池210正常工作时,充放电保护电路220通过放电控制端DO以及充电控制端CO分别控制MOS管M1以及MOS管M2处于导通状态;当充放电保护电路220检测到电池210处于过放电状态(电池210放电时,电池210的输出电压逐渐减小,当电池210的输出电压减小到过放保护电压(即欠电压保护阈值)时,电池210处于过放电状态)时,通过放电控制端DO控制MOS管M1断开,电池210的放电回路被切断,电池210停止放电。当充放电保护电路220检 测到电池210处于过充电状态(电池210充电时,电池210的输出电压逐渐增大,当电池210的输出电压增大到过充保护电压时,电池210处于过充电状态)时,通过充电控制端CO控制MOS管M2断开,电池210的充电回路被切断,电池210停止充电。
用电负载230为终端设备200中需要利用电池210提供的电能实现其功能的电子元器件,如处理器231、温度传感器232、重力传感器、距离传感器以及指纹传感器等其他传感器、显示屏以及射频芯片等(图4中未示出)。
另外,终端设备200还可以包括充电接口240,用于连接相应的电源适配器,通过电源适配器从外部电源获得电能,以对电池210进行充电。充电接口240具体可以为micro USB(通用串行总线universal serial bus的缩写)接口、Type-C接口或者闪电(lightning)接口等。
如图4所示,本申请实施例提供了一种电池放电控制方法,可以应用于如图2所示的终端设备,该方法主要包括以下步骤:
S401:终端设备200检测电池210的温度以及电池210的放电电流。
S402:当电池210的温度小于设定的温度阈值,且电池210的放电电流大于设定的电流阈值时,终端设备200减小电池210的欠电压保护阈值以及放电截止电压。
其中,电池210的欠电压保护阈值小于电池210的放电截止电压,设定的温度阈值可以为10℃,也可以为2℃或者0℃。当电池210的温度小于设定的温度阈值,且电池210的放电电流大于设定的电流阈值时,电池210在低温环境下放电,且电池210的输出电压接近当前设定的放电截止电压,如果不对电池210的欠电压保护阈值以及放电截止电压进行调整,电池210连接的用电负载230将被断开,用电负载230无法继续工作。
进一步地,执行步骤S402之后,终端设备200还执行步骤S403:当电池210的输出电压小于放电截止电压时,控制终端设备200关机(即断开电池210连接的用电负载230),增大电池210的欠电压保护阈值以及电池210的放电截止电压,以防止电池210发生损坏,保证电池210的使用寿命以及使用安全。
终端设备200中电池210与用电负载230断开之后,终端设备200处于关机状态,但是终端设备200还会消耗电池210中的电能,如果不增大电池210的欠电压保护阈值以及电池210的放电截止电压,在无法及时充电的场景下可能会损坏电池210。另外,电池210充电后,电池210的温度和/或电池210的放电电流会发生变化,需要重新根据电池210当前的温度以及电池210的放电电流判断是否需要调整电池210的欠电压保护阈值以及放电截止电压。例如,当电池210充满电后,如果电池210的放电电流较小,即使电池210的温度很低,也可以不调整电池210的欠电压保护阈值以及放电截止电压。
具体地,在步骤S403中,终端设备200可以将电池210的欠电压保护阈值调整到第一默认值,将电池210的放电截止电压调整到第二默认值。其中,第一默认值通常设置为常温下电池210的欠电压保护阈值,第二默认值通常设置为常温下电池210的放电截止电压。
另外,终端设备200还比较电池210的输出电压与电池210的欠电压保护阈值,根据比较结果控制电池210的放电回路导通或断开。其中,当电池210的输出电压大于电池210的欠电压保护阈值时,终端设备200控制电池210的放电回路导通;当电池210的输出电压小于电池210的欠电压保护阈值时,终端设备200控制电池210的放电回路断开,进行欠电压保护。
在一个具体的实施方式中,终端设备200可以通过终端设备200中的处理器231控制充放电保护电路220调整电池210的欠电压保护阈值,以及通过终端设备中的处理器231调整电池210的放电截止电压。此时,终端设备200包括处理器231和充放电保护电路220,充放电保护电路220包括电源端VDD、接地端VSS以及欠电压保护阈值控制端UVC,其中,电源端VDD用于连接电池210的正极,接地端VSS用于连接电池210的负极,欠电压保护阈值控制端UVC与处理器231连接,如图5所示。
处理器231,用于在电池210的温度小于设定的温度阈值,且电池的放电电流大于设定的电流阈值时,减小电池210的放电截止电压,发送第一控制信号。具体地,处理器231可以通过以下方式减小电池210的放电截止电压:处理器231将保存的放电截止电压的数值从第一数值修改为第二数值,其中,第二数值小于第一数值。
充放电保护电路220,用于通过欠电压保护阈值控制端UVC接收第一控制信号,在第一控制信号的控制下,减小电池210的欠电压保护阈值。
具体地,终端设备200还包括温度传感器232和电流采样电路233,处理器231通过温度传感器232获取电池210的温度,通过电流采样电路233获取电池210的放电电流,根据获取到的电池210的温度,判断电池210的温度是否小于设定的温度阈值,根据获取到的电池210的放电电流,判断电池210的放电电流是否大于设定的电流阈值。
或者,在充放电保护电路220包括电流采样端IS以及电流输出端时,处理器231也可以通过充放电保护电路220上的电流输出端,从充放电保护电路220获取充放电保护电路220的电流采样端IS检测到的电池210的放电电流。在充放电保护电路220包括温度采样端TS以及温度输出端时,处理器231也可以通过充放电保护电路220上的温度输出端,从充放电保护电路220获取充放电保护电路220的温度采样端TS检测到的电池210的温度。
进一步地,处理器231还用于:在电池210的输出电压小于电池210的放电截止电压时,控制终端设备200关机,增大电池210的放电截止电压,发送第二控制信号;充放电保护电路220还用于:在第二控制信号的控制下,增大电池210的欠电压保护阈值。
进一步地,充放电保护电路220还包括放电控制端DO,充放电保护电路220还用于:比较电池210的输出电压与电池210的欠电压保护阈值,根据比较结果通过放电控制端DO输出第三控制信号,第三控制信号用于控制电池210的放电回路导通或断开。其中,当电池210的输出电压大于电池210的欠电压保护阈值时,第三控制信号用于控制电池210的放电回路导通;当电池210的输出电压小于电池210的欠电压保护阈值时,第三控制信号用于控制电池210的放电回路断开,进行欠电压保护。
具体地,用电负载230与电池210之间的通路上连接有开关S1,当电池210的输出电压小于电池210的放电截止电压时,终端设备200控制开关S0断开,断开电池210连接的用电负载230,终端设备200关机。
在具体实施中,充放电保护电路220可以通过但不限于以下两种方式中的任意一种实现:
方式一、如图6A所示,充放电保护电路包括电池电压采样电路221、参考电压电路222和比较器223,电池采样电路221分别与电源端VDD、接地端VSS、欠电压保护阈值控制端UVC以及比较器223的第一输入端连接,参考电压电路222与比较器223的第二输入端连接,比较器223的输出端与放电控制端DO连接。其中,
电池电压采样电路221,用于对电池210的输出电压进行采样,在第一控制信号的控制下,增大采样电压。
参考电压电路222的输出电压用于表征电池210的欠电压保护阈值;
比较器223,用于比较参考电压电路222的输出电压与增大后的采样电压,根据比较结果输出第三控制信号。具体地,当参考电压电路222的输出电压小于增大后的采样电压,第三控制信号用于控制电池210的放电回路导通,当参考电压电路222的输出电压大于增大后的采样电压,第三控制信号用于控制电池210的放电回路断开。
由于参考电压电路222的输出电压不变,而电池电压采样电路221的输出电压(电池210的采样电压)增大,使得电池210可以继续放电,直到增大后的电池210的采样电压小于参考电压电路222的输出电压,相当于减小了欠电压保护阈值,进而使得在电池210的欠电压保护阈值调整之前,电池210中由于低温导致的无法继续使用的电量能够被释放出来,被充放电保护电路220连接的用电负载利用。
当电池210的输出电压小于电池210的放电截止电压时,电池电压采样电路221还用于在第二控制信号的控制下,减小采样电压。
进一步地,如图6B所示,电池电压采样电路221可以包括第一分压电阻Ra、第二分压电阻Rb和开关电阻阵列610,开关电阻阵列610包括多个相互并联的支路,每个支路包括第三分压电阻Rc以及与该第三分压电阻Rc串联的开关S1。其中,第一分压电阻Ra的第一端分别与电源端VDD以及开关电阻阵列610的第一端连接,第一分压电阻Ra的第二端分别与第二分压电阻Rb的第一端、开关电阻阵列610的第二端以及比较器223的第一输入端连接,开关电阻阵列610中开关S1的控制端与欠电压保护阈值控制端UVC连接,第二分压电阻Rb的第二端与接地端VSS连接;第一控制信号用于控制开关电阻阵列610中的至少一个开关S1从断开状态切换到导通状态。开关电阻阵列610中的至少一个开关S1从断开状态切换到导通状态之后,开关电阻阵列610的等效电阻减小,第二分压电阻Rb两端的电压增大,进而使得电池210的采样电压增大。
第二控制信号用于控制开关电阻阵列610中的至少一个开关S1从导通状态切换到断开状态。开关电阻阵列610中的至少一个开关S1从导通状态切换到断开状态之后,开关电阻阵列610的等效电阻增大,第二分压电阻Rb两端的电压减小,进而使得电池210的采样电压减小。
需要说明的是,上述图6B涉及的第一分压电阻Ra、第二分压电阻Rb以及第三分压电阻Rc可以为单个电阻,也可以为多个电阻通过串联、并联或者混联的方式得到的,开关电阻阵列610中每个支路包括的第三分压电阻Rc的大小可以相同,也可以不同。上述图6B中涉及的开关S1可以为三极管或MOS管等可控开关。另外,开关电阻阵列610中的多个支路也可以共用一个单刀多掷开关。
进一步地,如图6B所示,参考电压电路222可以为电压源。
方式二、如图7A所示,欠电压保护控制电路220包括电池电压采样电路221、参考电压电路222和比较器223,电池采样电路221分别与电源端VDD、接地端VSS以及比较器223的第一输入端连接,参考电压电路222分别与比较器223的第二输入端以及欠电压保护阈值控制端UVC连接,比较器的输出端与所述放电控制端连接。其中,
电池电压采样电路221,用于对电池210的电压进行采样。
参考电压电路222,用于在第一控制信号的控制下,减小参考电压电路222的输出电 压,参考电压电路222的输出电压用于表征电池210的欠电压保护阈值。
比较器223,用于比较电池电压采样电路221的输出电压与参考电压电路222的输出电压,根据比较结果输出第三控制信号。具体地,当电池电压采样电路221的输出电压大于参考电压电路222的输出电压时,第三控制信号用于控制电池210的放电回路导通,当电池电压采样电路221的输出电压小于参考电压电路222的输出电压时,第三控制信号用于控制电池210的放电回路断开。
由于参考电压电路222的输出电压在第一控制信号的控制下减小,使得电池210可以继续放电直到电池电压采样电路221的输出电压小于参考电压电路222的输出电压,使得在电池210的欠电压保护阈值调整之前,电池210中由于低温导致的无法继续使用的电量能够被释放出来,被充放电保护电路220连接的用电负载利用。
当电池210的输出电压小于电池210的放电截止电压时,参考电压电路222还用于在第二控制信号的控制下,增大参考电压电路222的输出电压。
进一步地,如图7B所示,电池电压采样电路221包括第一采样电阻Ra和第二采样电阻Rb;其中,第一分压电阻Ra的第一端与电源端VDD连接,第一分压电阻Ra的第二端分别与第二分压电阻Rb的第一端以及比较器223的第一输入端连接,第二分压电阻Rb的第二端与接地端VSS连接。
进一步地,如图7B所示,参考电压电路222包括多个相互并联的支路,每个支路包括电压源以及与该电压源串联的开关S2。其中,参考电压电路222的第一端接地,参考电压电路222的第二端与比较器223的第二输入端连接,参考电压电路222中的开关的控制端与欠电压保护阈值控制端UVC连接;第一控制信号用于控制参考电压电路222中的第一开关从导通状态切换到断开状态,控制参考电压电路222中的第二开关从断开状态切换到导通状态,第一开关串联的电压源的电压大于第二开关串联的电压源的电压。
第二控制信号用于控制参考电压电路222中的第一开关从断开状态切换到导通状态,控制参考电压电路222中的第二开关从导通状态切换到断开状态。
需要说明的是,上述图7B中涉及的第一分压电阻Ra以及第二分压电阻Rb可以为单个电阻,也可以为多个电阻通过串联、并联或者混联的方式得到的。上述图7B中涉及的开关S2可以为三极管、MOS管等可控开关。另外,参考电压电路222中的多个支路也可以共用一个单刀多掷开关。
在另一个具体的实施方式中,终端设备200可以通过终端设备中的充放电保护电路220进行电池210的欠电压保护阈值的调整,通过处理器231进行电池210的放电截止电压的调整。此时,终端设备200包括处理器231和充放电保护电路220,其中,处理器231,用于在电池210的温度小于设定的温度阈值,且电池210的放电电流大于设定的电流阈值时,减小电池210的放电截止电压;充放电保护电路220,用于在电池210的温度小于设定的温度阈值,且电池210的放电电流大于设定的电流阈值时,减小充放电保护电路220连接的电池210的欠电压保护阈值,如图8所示。
进一步地,处理器231还用于:在电池210的输出电压小于电池210的放电截止电压时,控制终端设备200关机,增大电池210的放电截止电压;充放电保护电路220还用于:在电池210的输出电压小于电池210的放电截止电压,终端设备200关机后,增大电池210的欠电压保护阈值。
具体实施中,如图8所示,充放电保护电路220包括电源端VDD、接地端VSS、温 度采样端TS、电流采样端IS、控制器810和欠电压保护控制电路820,电源端VDD用于连接电池210的正极,接地端VDD用于连接电池210的负极,控制器810分别与欠电压保护控制电路820、温度采样端TS以及电流采样端IS连接。其中,
控制器810,用于通过温度采样端TS获取电池210的温度,通过电流采样端IS获取电池210的放电电流;当电池210的温度小于设定的温度阈值,且电池210的放电电流大于设定的电流阈值时,发送第一控制信号。
欠电压保护控制电路820,用于在第一控制信号的控制下,减小电池210的欠电压保护阈值。
应当理解的是,控制器810的功能可以通过软件实现,即控制器810可已通过调用充放电保护电路220中的存储器(图中未示出)保存的代码指令实现上述控制器810的功能;控制器810的功能也可以通过硬件实现,例如通过比较器实现。
进一步地,充放电保护电路220还包括放电控制端DO,欠电压保护控制电路820还用于:比较电池210的输出电压与电池210的欠电压保护阈值,根据比较结果通过放电控制端输出DO第三控制信号,第三控制信号用于控制电池210的放电回路导通或断开。其中,当电池210的输出电压大于电池210的欠电压保护阈值时,第三控制信号用于控制电池210的放电回路导通,当电池210的输出电压小于电池210的欠电压保护阈值时,第三控制信号用于控制电池210的放电回路断开,进行欠电压保护。
在具体实施中,欠电压保护控制电路820具体可以通过但不限于如图6A或图7A所示的结构实现,当欠电压保护控制电路820通过如图6A所述的结构实现时,欠电压保护控制电路820中的电池电压采样电路以及参考电压电路具体可以通过如图6B所示的结构实现,当欠电压保护控制电路820通过如图7A所述的结构实现时,欠电压保护控制电路820中的电池电压采样电路以及参考电压电路具体可以通过如图7B所示的结构实现,此处不再赘述。
通过上述方案,终端设备200在电池210的温度小于设定的温度阈值,且电池210的放电电流大于设定的电流阈值时,减小电池210的欠电压保护阈值以及电池210的放电截止电压,使得电池210能够继续放电,直到电池210的输出电压小于减小后的欠电压保护阈值,进而使得在电池210的欠电压保护阈值调整之前,电池210中由于低温导致的无法继续使用的电量能够被释放出来,进而使得终端设备200可以继续工作,提高终端设备200的续航能力。
基于以上实施例,本申请实施例还提供了一种充放电保护电路220,以实现在低温环境下调整电池的欠电压保护阈值。
在一个可能的实施方式中,如图5所示,充放电保护电路220包括电源端VDD、接地端VSS以及欠电压保护阈值控制端UVC,其中,电源端VDD用于连接电池210的正极,接地端VSS用于连接电池210的负极,欠电压保护阈值控制端UVC用于接收第一控制信号,充放电保护电路,用于当电池210的温度小于设定的温度阈值,且电池210的放电电流大于设定的电流阈值时,在第一控制信号的控制下,减小电池210的欠电压保护阈值。
进一步地,欠电压保护阈值控制端UVC还用于接收第二控制信号,充放电保护电路220还用于:当电池210的输出电压小于电池210的放电截止电压时,在第二控制信号的控制下,增大电池210的欠电压保护阈值。
进一步地,充放电保护电路220还包括放电控制端DO,放电控制端DO用于输出第 三控制信号;充放电保护电路220还用于:比较电池的输出电压与电池的欠电压保护阈值,根据比较结果输出第三控制信号,第三控制信号用于控制所述电池的放电回路导通或断开。
在具体实施中,充放电保护电路220具体可以通过但不限于如图6A或图7A所示的结构实现,当充放电保护电路220通过如图6A所述的结构实现时,充放电保护电路220中的电池电压采样电路以及参考电压电路具体可以通过如图6B所示的结构实现,当充放电保护电路220通过如图7A所述的结构实现时,充放电保护电路220中的电池电压采样电路以及参考电压电路具体可以通过如图7B所示的结构实现,此处不再赘述。
在另一个可能的实施方式中,如图8所示,充放电保护电路220包括电源端VDD、接地端VSS、温度采样端TS、电流采样端IS、控制器810和欠电压保护控制电路820,电源端VDD用于连接电池210的正极,接地端VDD用于连接电池210的负极,控制器810分别与欠电压保护控制电路820、温度采样端TS以及电流采样端IS连接。其中,控制器810,用于通过温度采样端TS获取电池210的温度,通过电流采样端IS获取电池210的放电电流;当电池210的温度小于设定的温度阈值,且电池210的放电电流大于设定的电流阈值时,发送第一控制信号;欠电压保护控制电路820,用于在第一控制信号的控制下,减小电池210的欠电压保护阈值。
进一步地,控制器810还用于:在电池210的输出电压小于电池210的放电截止电压时,发送第二控制信号;欠电压保护控制电路820还用于:在第二控制信号的控制下,增大电池210的欠电压保护阈值。
进一步地,充放电保护电路220还包括放电控制端DO,放电控制端DO与欠电压保护控制电路820连接;欠电压保护控制电路820还用于:比较电池210的输出电压与电池210的欠电压保护阈值,根据比较结果通过放电控制端DO输出第三控制信号,第三控制信号用于控制电池210的放电回路导通或断开。
在具体实施中,欠电压保护控制电路820具体可以通过但不限于如图6A或图7A所示的结构实现,当欠电压保护控制电路820通过如图6A所述的结构实现时,欠电压保护控制电路820中的电池电压采样电路以及参考电压电路具体可以通过如图6B所示的结构实现,当欠电压保护控制电路820通过如图7A所述的结构实现时,欠电压保护控制电路820中的电池电压采样电路以及参考电压电路具体可以通过如图7B所示的结构实现,此处不再赘述。
本申请实施例还提供了一种电池放电控制方法,应用于上述第一种充放电保护电路220,即电池210工作在低温环境下,充放电保护电路220通过从外部接收的控制信号,调整电池210的欠电压保护阈值。如图9A所示,该方法包括:
S901A:在充电保护电路220连接的电池210的温度小于设定的温度阈值,且电池210的放电电流大于设定的电流阈值时,接收第一控制信号;
S902A:在第一控制信号的控制下,减小电池210的欠电压保护阈值。
进一步地,充放电保护电路220在电池210的输出电压小于电池210的放电截止电压时,还接收第二控制信号,在第二控制信号的控制下,增大电池210的欠电压保护阈值。
进一步地,充放电保护电路220还比较电池210的输出电压和电池210的欠电压保护阈值,根据比较结果输出第三控制信号,第三控制信号用于控制电池210的放电回路断开或导通。其中,当池210的输出电压大于电池210的欠电压保护阈值,第三控制信号用于控制电池210的放电回路导通,当池210的输出电压小于电池210的欠电压保护阈值,第 三控制信号用于控制电池210的放电回路断开。
本申请实施例还提供了一种电池放电控制方法,应用于上述第二种充放电保护电路220,即电池210工作在低温环境下,充放电保护电路220自身调整电池210的欠电压保护阈值。如图9B所示,该方法包括:
S901B:获取充电保护电路220连接的电池210的温度和电池210的放电电流。
S901B:在电池210的温度小于设定的温度阈值,且电池210的放电电流大于设定的电流阈值时,减小电池210的欠电压保护阈值。
进一步地,充放电保护电路220在电池210的输出电压小于电池210的放电截止电压时,还增大电池210的欠电压保护阈值。
进一步地,充放电保护电路220比较电池210的输出电压和电池210的欠电压保护阈值,根据比较结果输出第三控制信号,第三控制信号用于控制电池210的放电回路断开或导通。
通过上述方案,充放电保护电路220在电池210的温度小于设定的温度阈值,且电池210的放电电流大于设定的电流阈值时,减小电池210的欠电压保护阈值,使得电池210能够继续放电,直到电池210的输出电压小于减小后的欠电压保护阈值,进而使得在电池210的欠电压保护阈值调整之前,电池210中由于低温导致的无法继续使用的电量能够被释放出来,被充放电保护电路220连接的负载利用。
终端设备中的电池在终端设备工作时需要循环进行充放电过程,电池会发生老化(例如电池中的电解液变少),导致电池的内阻R增大,而电池的输出电压U
o=V
DD-IR,相较于新的电池,老化后的电池的输出电压变小。但是,目前电池的欠电压保护阈值以及放电截止电压通常以新电池在常温下的性能为依据设定的,相较于常温下电池的输出电压到放电截止电压时电池的电量,老化后的电池的输出电压达到常温下所设定的电池的放电截止电压时,老化后的电池还具有较多的电量,但是电池上连接的用电负载无法继续从电池中获取电能,导致电池的电量无法得到有效利用。
因此,为了进一步提高电池的电量的利用率,本申请还提供了一种电池放电控制方法,可以应用于如图2所示的终端设备。如图10所示,该方法主要包括以下步骤:
S1001:终端设备200检测终端设备200中电池210的放电电流,并统计电池210的充放电循环次数。
其中,电池210的充放电循环次数可以表征电池210的老化程度,电池210的充放电循环次数越大,电池210的老化程度越严重。
S1002:终端设备200在电池210的充放电循环次数大于设定次数,且电池210的放电电流大于设定的电流阈值时,减小电池210的欠电压保护阈值以及电池210的放电截止电压。
其中,电池210的欠电压保护阈值小于电池210的放电截止电压,设定次数可以为500次,也可以为600次,或450次,具体可以根据实际情况设定设定次数。当电池210的充放电循环次数大于设定次数,且电池210的放电电流大于设定的电流阈值时,电池210发生老化,且电池210的输出电压接近当前设定的放电截止电压,如果不对电池210的欠电压保护阈值以及放电截止电压进行调整,电池210连接的用电负载230将被断开,用电负载230无法继续工作。
进一步地,终端设备200还执行步骤S1003:当电池210的输出电压小于减小后的放 电截止电压时,控制终端设备200关机(即断开电池210连接的用电负载230),增大电池210的欠电压保护阈值以及电池210的放电截止电压,以防止电池210发生损坏,保证电池210的使用寿命以及使用安全。
终端设备200中电池210与用电负载230断开之后,终端设备200处于关机状态,但是终端设备200还会消耗电池210中的电能,如果不增大电池210的欠电压保护阈值以及电池210的放电截止电压,在无法及时充电的场景下可能会损坏电池210。另外,电池210充电后,电池210的放电电流会发生变化,需要重新根据电池210当前的充放电循环次数以及电池210的放电电流判断是否需要调整电池210的欠电压保护阈值以及放电截止电压。例如,当电池210充满电后,如果电池210的放电电流较小,即使电池210的充放电循环次数较大,也可以不调整电池210的欠电压保护阈值以及放电截止电压。
具体地,在步骤S1003中,终端设备200可以将电池210的欠电压保护阈值调整到第一默认值,将电池210的放电截止电压调整到第二默认值。其中,第一默认值通常设置为电池210为新电池(没有老化)时的欠电压保护阈值,第二默认值通常设置为电池210为新电池(没有老化)时的放电截止电压。
另外,终端设备200还比较电池210的输出电压与电池210的欠电压保护阈值,根据比较结果控制电池210的放电回路导通或断开。其中,当电池210的输出电压大于电池210的欠电压保护阈值时,控制电池210的放电回路导通;当电池210的输出电压小于电池210的欠电压保护阈值时,控制电池210的放电回路断开,进行欠电压保护。
在一个具体的实施方式中,终端设备200可以通过终端设备200中的处理器231控制充放电保护电路220调整电池210的欠电压保护阈值,以及通过终端设备中的处理器231调整电池210的放电截止电压。此时,终端设备200包括处理器231和充放电保护电路220,充放电保护电路220包括电源端VDD、接地端VSS以及欠电压保护阈值控制端UVC,其中,电源端VDD用于连接电池210的正极,接地端VSS用于连接电池210的负极,欠电压保护阈值控制端UVC与处理器231连接,如图5所示。
处理器231,用于在电池210的充放电循环次数大于设定次数,且电池210的放电电流大于设定的电流阈值时,减小电池210的放电截止电压,发送第一控制信号。具体地,处理器231可以通过以下方式减小电池210的放电截止电压:处理器231将保存的放电截止电压的数值从第一数值修改为第二数值,其中,第二数值小于第一数值。
充放电保护电路220,用于通过欠电压保护阈值控制端UVC接收第一控制信号,在第一控制信号的控制下,减小电池210的欠电压保护阈值。
具体地,终端设备200还包括电流采样电路233,处理器231通过电流采样电路233获取电池210的放电电流,根据获取到的电池210的放电电流,判断电池210的放电电流是否大于设定的电流阈值。或者,在充放电保护电路220包括电流采样端IS以及电流输出端,电流输出端用于向处理器231传输电池210的放电电流时,处理器231也可以通过充放电保护电路220上的电流输出端,获取充放电保护电路220的电流采样端IS检测到的电池210的放电电流。
进一步地,处理器231还用于:在电池210的输出电压小于电池210的放电截止电压时,控制终端设备200关机,增大电池210的放电截止电压,发送第二控制信号;充放电保护电路220还用于:在第二控制信号的控制下,增大电池210的欠电压保护阈值。
具体地,终端设备200还包括电压采样电路234,处理器231通过电压采样电路234 获取电池210的输出电压,根据获取到的电池210的输出电压,判断电池210的输出电压是否小于电池210的放电截止电压。
进一步地,充放电保护电路220还包括放电控制端DO,充放电保护电路220还用于:比较电池210的输出电压与电池210的欠电压保护阈值,根据比较结果通过放电控制端DO输出第三控制信号,第三控制信号用于控制电池210的放电回路导通或断开。其中,当电池210的输出电压大于电池210的欠电压保护阈值时,第三控制信号用于控制电池210的放电回路导通;当电池210的输出电压小于电池210的欠电压保护阈值时,第三控制信号用于控制电池210的放电回路断开,进行欠电压保护。
具体地,用电负载230与电池210之间的通路上连接有开关S1,当电池210的输出电压小于电池210的放电截止电压时,终端设备200控制开关S0断开,断开电池210连接的用电负载230,终端设备200关机。
在具体实施中,充放电保护电路220具体可以通过但不限于如图6A或图7A所示的结构实现,当充放电保护电路220通过如图6A所述的结构实现时,充放电保护电路220中的电池电压采样电路以及参考电压电路具体可以通过如图6B所示的结构实现,当充放电保护电路220通过如图7A所述的结构实现时,充放电保护电路220中的电池电压采样电路以及参考电压电路具体可以通过如图7B所示的结构实现,此处不再赘述。
在另一个具体的实施方式中,终端设备200可以通过终端设备中的充放电保护电路220进行电池210的欠电压保护阈值的调整,通过处理器231进行电池210的放电截止电压的调整。此时,终端设备200包括处理器231和充放电保护电路220,其中,处理器231,用于在电池210的充放电循环次数大于设定次数,且电池210的放电电流大于设定的电流阈值时,减小电池210的放电截止电压;充放电保护电路220,用于在电池210的充放电循环次数大于设定次数,且电池210的放电电流大于设定的电流阈值时,减小充放电保护电路220连接的电池210的欠电压保护阈值,如图11所示。
进一步地,处理器231还用于:在电池210的输出电压小于电池210的放电截止电压时,控制终端设备200关机,增大电池210的放电截止电压;充放电保护电路220还用于:在电池210的输出电压小于电池210的放电截止电压,终端设备200关机后,增大电池210的欠电压保护阈值。
具体实施中,如图11所示,充放电保护电路220包括电源端VDD、接地端VSS、电流采样端IS、控制器1110和欠电压保护控制电路820,电源端VDD用于连接电池210的正极,接地端VDD用于连接电池210的负极,控制器1110分别与欠电压保护控制电路1120以及电流采样端IS连接。其中,
控制器1110,用于统计电池210的充放电循环次数,通过电流采样端IS获取电池210的放电电流;当电池210的充放电循环次数大于设定次数,且电池210的放电电流大于设定的电流阈值时,发送第一控制信号。
欠电压保护控制电路1120,用于在第一控制信号的控制下,减小电池210的欠电压保护阈值。
应当理解的是,控制器1110的功能可以通过软件实现,即控制器1110可已通过调用充放电保护电路220中的存储器(图中未示出)保存的代码指令实现上述控制器1110的功能;控制器1110的功能也可以通过硬件实现,例如通过比较器实现。
进一步地,控制器1110还用于:在电池210的输出电压小于电池210的放电截止电压, 终端设备200关机后,发送第二控制信号;欠电压保护控制电路1120还用于:在第二控制信号的控制下,增大电池210的欠电压保护阈值。
进一步地,充放电保护电路220还包括放电控制端DO,欠电压保护控制电路1120还用于:比较电池210的输出电压与电池210的欠电压保护阈值,根据比较结果通过放电控制端输出DO第三控制信号,第三控制信号用于控制电池210的放电回路导通或断开。其中,当电池210的输出电压大于电池210的欠电压保护阈值时,第三控制信号用于控制电池210的放电回路导通,当电池210的输出电压小于电池210的欠电压保护阈值时,第三控制信号用于控制电池210的放电回路断开,进行欠电压保护。
在具体实施中,欠电压保护控制电路1120具体可以通过但不限于如图6A或图7A所示的结构实现,当欠电压保护控制电路1120通过如图6A所述的结构实现时,欠电压保护控制电路1120中的电池电压采样电路以及参考电压电路具体可以通过如图6B所示的结构实现,当欠电压保护控制电路1120通过如图7A所述的结构实现时,欠电压保护控制电路1120中的电池电压采样电路以及参考电压电路具体可以通过如图7B所示的结构实现,此处不再赘述。
通过上述方案,终端设备200在电池210的充放电循环次数大于设定次数,即电池210发生老化,且电池210的放电电流大于设定的电流阈值时,减小电池210的欠电压保护阈值以及电池210的放电截止电压,使得电池210能够继续放电,直到电池210的输出电压小于减小后的欠电压保护阈值,使得在电池210的欠电压保护阈值调整之前,电池210中由于老化导致的无法继续使用的电量能够被释放出来,进而使得终端设备200可以继续工作,提高终端设备200的续航能力。
基于以上实施例,本申请实施例还提供了一种充放电保护电路220,以实现在电池老化的场景下调整电池的欠电压保护阈值。
在一个可能的实施方式中,如图5所示,充放电保护电路220包括电源端VDD、接地端VSS以及欠电压保护阈值控制端UVC,其中,电源端VDD用于连接电池210的正极,接地端VSS用于连接电池210的负极,欠电压保护阈值控制端UVC用于接收第一控制信号,充放电保护电路,用于当电池210的充放电循环次数大于设定次数,且电池210的放电电流大于设定的电流阈值时,在第一控制信号的控制下,减小电池210的欠电压保护阈值。
进一步地,欠电压保护阈值控制端UVC还用于接收第二控制信号,充放电保护电路220还用于:当电池210的输出电压小于电池210的放电截止电压时,在第二控制信号的控制下,增大电池210的欠电压保护阈值。
进一步地,充放电保护电路220还包括放电控制端DO,放电控制端DO用于输出第三控制信号;充放电保护电路220还用于:比较电池的输出电压与电池的欠电压保护阈值,根据比较结果输出第三控制信号,第三控制信号用于控制所述电池的放电回路导通或断开。
在具体实施中,充放电保护电路220具体可以通过但不限于如图6A或图7A所示的结构实现,当充放电保护电路220通过如图6A所述的结构实现时,充放电保护电路220中的电池电压采样电路以及参考电压电路具体可以通过如图6B所示的结构实现,当充放电保护电路220通过如图7A所述的结构实现时,充放电保护电路220中的电池电压采样电路以及参考电压电路具体可以通过如图7B所示的结构实现,此处不再赘述。
在另一个可能的实施方式中,如图11所示,充放电保护电路220包括电源端VDD、 接地端VSS、电流采样端IS、控制器1110和欠电压保护控制电路1120,电源端VDD用于连接电池210的正极,接地端VDD用于连接电池210的负极,控制器1110分别与欠电压保护控制电路1120以及电流采样端IS连接。其中,控制器1110,用于统计电池210的充放电循环次数,通过电流采样端IS获取电池210的放电电流;当电池210的充放电循环次数大于设定次数,且电池210的放电电流大于设定的电流阈值时,发送第一控制信号;欠电压保护控制电路1120,用于在第一控制信号的控制下,减小电池210的欠电压保护阈值。
进一步地,控制器1110还用于:在电池210的输出电压小于电池210的放电截止电压时,发送第二控制信号;欠电压保护控制电路1120还用于:在第二控制信号的控制下,增大电池210的欠电压保护阈值。
进一步地,充放电保护电路220还包括放电控制端DO,放电控制端DO与欠电压保护控制电路1120连接;欠电压保护控制电路1120还用于:比较电池210的输出电压与电池210的欠电压保护阈值,根据比较结果通过放电控制端DO输出第三控制信号,第三控制信号用于控制电池210的放电回路导通或断开。
在具体实施中,欠电压保护控制电路1120具体可以通过但不限于如图6A或图7A所示的结构实现,当欠电压保护控制电路1120通过如图6A所述的结构实现时,欠电压保护控制电路1120中的电池电压采样电路以及参考电压电路具体可以通过如图6B所示的结构实现,当欠电压保护控制电路1120通过如图7A所述的结构实现时,欠电压保护控制电路1120中的电池电压采样电路以及参考电压电路具体可以通过如图7B所示的结构实现,此处不再赘述。
本申请实施例还提供了一种电池放电控制方法,应用于上述第一种充放电保护电路220,即在电池210老化的场景下,充放电保护电路220通过从外部接收的控制信号,调整电池210的欠电压保护阈值。如图12A所示,该方法包括:
S1201A:在充电保护电路220连接的电池210的充放电循环次数大于设定次数,且电池210的放电电流大于设定的电流阈值时,接收第一控制信号;
S1202A:在所述第一控制信号的控制下,减小电池210的欠电压保护阈值。
进一步地,充放电保护电路220在电池210的输出电压小于电池210的放电截止电压时,还接收第二控制信号,在第二控制信号的控制下,增大电池210的欠电压保护阈值。
进一步地,充放电保护电路220还比较电池210的输出电压和电池210的欠电压保护阈值,根据比较结果输出第三控制信号,第三控制信号用于控制电池210的放电回路断开或导通。其中,当池210的输出电压大于电池210的欠电压保护阈值,第三控制信号用于控制电池210的放电回路导通,当池210的输出电压小于电池210的欠电压保护阈值,第三控制信号用于控制电池210的放电回路断开。
本申请实施例还提供了一种电池放电控制方法,应用于上述第二种充放电保护电路220,即在电池210老化的场景下,充放电保护电路220自身调整电池210的欠电压保护阈值。如图12B所示,该方法包括:
S1201B:获取充电保护电路220连接的电池210的充放电循环次数和电池210的放电电流。
S1201B:在电池210的充放电循环次数大于设定次数,且电池210的放电电流大于设定的电流阈值时,减小电池210的欠电压保护阈值。
进一步地,充放电保护电路220在电池210的输出电压小于电池210的放电截止电压时,还增大电池210的欠电压保护阈值。
进一步地,充放电保护电路220比较电池210的输出电压和电池210的欠电压保护阈值,根据比较结果输出第三控制信号,第三控制信号用于控制电池210的放电回路断开或导通。
通过上述方案,充放电保护电路220在电池210的充放电循环次数大于设定次数,即电池210发生老化,且电池210的放电电流大于设定的电流阈值时,减小电池210的欠电压保护阈值,使得电池210能够继续放电,直到电池210的输出电压小于减小后的欠电压保护阈值,进而使得在电池210的欠电压保护阈值调整之前,电池210中由于老化导致的无法继续使用的电量能够被释放出来,被充放电保护电路220连接的用电负载利用。
实施例一:
一种充放电保护电路,包括:电源端(例如图5的VDD)、接地端(例如图5的VSS)以及欠电压保护阈值控制端(例如图5的UVC);其中,所述电源端用于连接电池的正极,所述接地端用于连接电池的负极,所述欠电压保护阈值控制端用于接收第一控制信号;
所述充放电保护电路,用于当所述电池的温度小于设定的温度阈值,且所述电池的放电电流大于设定的电流阈值时,在所述第一控制信号的控制下,减小所述电池的欠电压保护阈值。
在一种实现方式中,所述欠电压保护阈值控制端还用于接收第二控制信号;
所述充放电保护电路还用于:当所述电池的输出电压小于所述电池的放电截止电压时,在所述第二控制信号的控制下,增大所述电池的欠电压保护阈值。
在一种实现方式中,充放电保护电路还包括放电控制端(例如DO),所述放电控制端用于输出第三控制信号;
所述充放电保护电路还用于:比较所述电池的输出电压与所述电池的欠电压保护阈值,根据比较结果输出所述第三控制信号,所述第三控制信号用于控制所述电池的放电回路导通或断开。
在一种实现方式中,包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端、所述欠电压保护阈值控制端以及所述比较器的第一输入端连接,所述参考电压电路与所述比较器的第二输入端连接,所述比较器的输出端与所述放电控制端连接;
所述电池电压采样电路,用于对所述电池的输出电压进行采样,在所述第一控制信号的控制下,增大采样电压;
所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;
所述比较器,用于比较所述参考电压电路的输出电压与增大后的所述采样电压,根据比较结果生输出述第三控制信号。
在一种实现方式中,所述电池电压采样电路包括第一分压电阻(例如图6B的Ra)、第二分压电阻(例如图6B的Rb)和开关电阻阵列,所述开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与所述第三分压电阻串联的开关;
其中,所述第一分压电阻的第一端分别与所述电源端以及所述开关电阻阵列的第一端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端、所述开关电阻阵列的第二端以及所述比较器的第一输入端连接,所述开关电阻阵列中开关的控制端与所述欠 电压保护阈值控制端连接,所述第二分压电阻的第二端与所述接地端连接;所述第一控制信号用于控制所述开关电阻阵列中的至少一个开关从断开状态切换为导通状态。
在一种实现方式中,所述参考电压电路为电压源。
在一种实现方式中,包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端以及所述比较器的第一输入端连接,所述参考电压电路分别与所述比较器的第二输入端以及所述欠电压保护阈值控制端连接;
所述电池电压采样电路,用于对所述电池的输出电压进行采样;
所述参考电压电路,用于在所述第一控制信号的控制下,减小所述参考电压电路的输出电压;所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;
所述比较器,用于比较所述电池电压采样电路的输出电压与所述参考电压电路的输出电压,根据比较结果输出所述第三控制信号。
在一种实现方式中,所述电池电压采样电路包括第一采样电阻和第二采样电阻;其中,所述第一分压电阻的第一端与所述电源端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端以及所述比较器的第一输入端连接,所述第二分压电阻的第二端与所述接地端连接。
在一种实现方式中,所述参考电压电路包括多个相互并联的支路,每个支路包括电压源以及与所述电压源串联的开关;
其中,所述参考电压电路的第一端接地,所述参考电压电路的第二端与所述比较器的第二输入端连接,所述参考电压电路中的开关的控制端与所述欠电压保护阈值控制端连接;所述第一控制信号用于控制所述参考电压电路中的第一开关从导通状态切换到断开状态,控制所述参考电压电路中的第二开关从断开状态切换到导通状态,所述第一开关串联的电压源的电压大于所述第二开关串联的电压源的电压。
实施例二:
一种终端设备,其中,所述终端设备包括处理器和充放电保护电路,所述充放电保护电路包括电源端、接地端以及欠电压保护阈值控制端;其中,所述电源端用于连接电池的正极,所述接地端用于连接电池的负极,所述欠电压保护阈值控制端与所述处理器连接;
所述处理器,用于在所述电池的温度小于设定的温度阈值,且所述电池的放电电流大于设定的电流阈值时,减小所述电池的放电截止电压,发送第一控制信号;
所述充放电保护电路,用于通过所述欠电压保护阈值控制端接收所述第一控制信号,在所述第一控制信号的控制下,减小所述电池的欠电压保护阈值。
在一种实现方式中,所述处理器还用于:在所述电池的输出电压小于所述电池的放电截止电压时,控制所述终端设备关机,增大所述电池的放电截止电压,发送第二控制信号;
所述充放电保护电路还用于:在所述第二控制信号的控制下,增大所述电池的欠电压保护阈值。
在一种实现方式中,所述充放电保护电路还包括放电控制端;
所述充放电保护电路还用于:比较所述电池的输出电压与所述电池的欠电压保护阈值,根据比较结果通过所述放电控制端输出第三控制信号,所述第三控制信号用于控制所述电池的放电回路导通或断开。
在一种实现方式中,所述充放电保护电路包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端、所述欠电压保护阈值控 制端以及所述比较器的第一输入端连接,所述参考电压电路与所述比较器的第二输入端连接,所述比较器的输出端与所述放电控制端连接;
所述电池电压采样电路,用于对所述电池的输出电压进行采样,在所述第一控制信号的控制下,增大采样电压;
所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;
所述比较器,用于比较所述参考电压电路的输出电压与增大后的所述采样电压,根据比较结果输出所述第三控制信号。
在一种实现方式中,所述电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,所述开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与所述第三分压电阻串联的开关;
其中,所述第一分压电阻的第一端分别与所述电源端以及所述开关电阻阵列的第一端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端、所述开关电阻阵列的第二端以及所述比较器的第一输入端连接,所述开关电阻阵列中开关的控制端与所述欠电压保护阈值控制端连接,所述第二分压电阻的第二端与所述接地端连接;所述第一控制信号用于控制所述开关电阻阵列中的至少一个开关从断开状态切换到导通状态。
在一种实现方式中,所述参考电压电路为电压源。
在一种实现方式中,所述充放电保护电路包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端以及所述比较器的第一输入端连接,所述参考电压电路分别与所述比较器的第二输入端以及所述欠电压保护阈值控制端连接,所述比较器的输出端与所述放电控制端连接;
所述电池电压采样电路,用于对所述电池的电压进行采样;
所述参考电压电路,用于在所述第一控制信号的控制下,减小所述参考电压电路的输出电压,所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;
所述比较器,用于比较所述电池电压采样电路的输出电压与所述参考电压电路的输出电压,根据比较结果输出所述第三控制信号。
在一种实现方式中,所述电池电压采样电路包括第一采样电阻和第二采样电阻;其中,所述第一分压电阻的第一端与所述电源端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端以及所述比较器的第一输入端连接,所述第二分压电阻的第二端与所述接地端连接。
在一种实现方式中,所述参考电压电路包括多个相互并联的支路,每个支路包括电压源以及与所述电压源串联的开关;
其中,所述参考电压电路的第一端接地,所述参考电压电路的第二端与所述比较器的第二输入端连接,所述参考电压电路中的开关的控制端与所述欠电压保护阈值控制端连接;所述第一控制信号用于控制所述参考电压电路中的第一开关从导通状态切换到断开状态,控制所述参考电压电路中的第二开关从断开状态切换到导通状态,所述第一开关串联的电压源的电压大于所述第二开关串联的电压源的电压。
实施例三:
一种充放电保护电路,其中,包括:电源端(例如图8的VDD)、接地端(例如图8的VSS)、温度采样端(例如图8的TS)、电流采样端(例如图8的IS)、控制器和欠电压保护控制电路,所述电源端用于连接电池的正极,所述接地端用于连接所述电池的负极, 所述控制器分别与所述欠电压保护控制电路、所述温度采样端以及电流采样端连接;
所述控制器,用于通过所述温度采样端获取所述电池的温度,通过所述电流采样端获取所述电池的放电电流;当所述电池的温度小于设定的温度阈值,且所述电池的放电电流大于设定的电流阈值时,发送第一控制信号;
所述欠电压保护控制电路,用于在所述第一控制信号的控制下,减小所述电池的欠电压保护阈值。
在一种实现方式中,所述控制器还用于:当所述电池的输出电压小于所述电池的放电截止电压时,发送第二控制信号;
所述欠电压保护控制电路还用于:在所述第二控制信号的控制下,增大所述电池的欠电压保护阈值。
在一种实现方式中,还包括放电控制端,所述放电控制端与所述欠电压保护控制电路连接;
所述欠电压保护控制电路还用于:比较所述电池的输出电压与所述电池的欠电压保护阈值,根据比较结果通过所述放电控制端输出第三控制信号,第三控制信号用于控制所述电池的放电回路导通或断开。
在一种实现方式中,所述欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端、所述欠电压保护阈值控制端以及所述比较器的第一输入端连接,所述参考电压电路与所述比较器的第二输入端连接,所述比较器的输出端与所述放电控制端连接;
所述电池电压采样电路,用于对所述电池的输出电压进行采样,在所述第一控制信号的控制下,增大采样电压;
所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;
所述比较器,用于比较所述参考电压电路的输出电压与增大后的所述采样电压,根据比较结果输出所述第三控制信号。
在一种实现方式中,所述电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,所述开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与所述第三分压电阻串联的开关;
其中,所述第一分压电阻的第一端分别与所述电源端以及所述开关电阻阵列的第一端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端、所述开关电阻阵列的第二端以及所述比较器的第一输入端连接,所述开关电阻阵列中开关的控制端与所述欠电压保护阈值控制端连接,所述第二分压电阻的第二端与所述接地端连接;所述第一控制信号用于控制所述开关电阻阵列中的至少一个开关从断开状态切换到导通状态。
在一种实现方式中,所述参考电压电路为电压源。
在一种实现方式中,所述欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端以及所述比较器的第一输入端连接,所述参考电压电路分别与所述比较器的第二输入端以及所述欠电压保护阈值控制端连接;
所述电池电压采样电路,用于对所述电池的输出电压进行采样;
所述参考电压电路,用于在所述第一控制信号的控制下,减小所述参考电压电路的输出电压;所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;
所述比较器,用于比较所述参考电压电路的输出电压与所述电池电压采样电路的输出电压,根据比较结果输出所述第三控制信号。
在一种实现方式中,所述电池电压采样电路包括第一采样电阻和第二采样电阻;其中,所述第一分压电阻的第一端与所述电源端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端以及所述比较器的第一输入端连接,所述第二分压电阻的第二端与所述接地端连接。
在一种实现方式中,所述参考电压电路包括多个相互并联的支路,每个支路包括电压源以及与所述电压源串联的开关;
其中,所述参考电压电路的第一端接地,所述参考电压电路的第二端与所述比较器的第二输入端连接,所述参考电压电路中的开关的控制端与所述欠电压保护阈值控制端连接;所述第一控制信号用于控制所述参考电压电路中的第一开关从导通状态切换到断开状态,控制所述参考电压电路中的第二开关从断开状态切换到导通状态,所述第一开关串联的电压源的电压大于所述第二开关串联的电压源的电压。
实施例四:
一种终端设备,其中,所述终端设备包括处理器和充放电保护电路;
所述处理器,用于在所述充放电保护电路连接的电池的温度小于设定的温度阈值,且所述电池的放电电流大于设定的电流阈值时,减小所述电池的放电截止电压;
所述充放电保护电路,用于在所述电池的温度小于设定的温度阈值,且所述电池的放电电流大于设定的电流阈值时,减小所述电池的欠电压保护阈值。
在一种实现方式中,所述处理器还用于:在所述电池的输出电压小于所述电池的放电截止电压时,控制所述终端设备关机,增大所述电池的放电截止电压;
所述充放电保护电路还用于:在所述电池的输出电压小于所述电池的放电截止电压,所述终端设备关机后,增大所述电池的欠电压保护阈值。
在一种实现方式中,所述充放电保护电路包括电源端、接地端、温度采样端、电流采样端、控制器和欠电压保护控制电路;其中,所述电源端用于连接所述电池的正极,所述接地端用于连接所述电池的负极,所述控制器分别与所述欠电压保护控制电路、所述温度采样端以及电流采样端连接;
所述控制器,用于通过所述温度采样端获取所述电池的温度,通过所述电流采样端获取所述电池的放电电流;当所述电池的温度小于设定的温度阈值,且所述电池的放电电流大于设定的电流阈值时,发送第一控制信号;
所述欠电压保护控制电路,用于在所述第一控制信号的控制下,减小所述电池的欠电压保护阈值。
在一种实现方式中,所述充放电保护电路还包括放电控制端;
所述欠电压保护控制电路还用于:比较所述电池的输出电压与所述电池的欠电压保护阈值,根据比较结果通过所述放电控制端输出第三控制信号,所述第三控制信号用于控制所述电池的放电回路导通或断开。
在一种实现方式中,所述欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端、所述欠电压保护阈值控制端以及所述比较器的第一输入端连接,所述参考电压电路与所述比较器的第二输入端连接,所述比较器的输出端与所述放电控制端连接;
所述电池电压采样电路,用于对所述电池的输出电压进行采样,在所述第一控制信号的控制下,增大采样电压;
所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;
所述比较器,用于比较所述参考电压电路的输出电压与增大后的所述采样电压,根据比较结果输出所述第三控制信号。
在一种实现方式中,所述电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,所述开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与所述第三分压电阻串联的开关;
其中,所述第一分压电阻的第一端分别与所述电源端以及所述开关电阻阵列的第一端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端、所述开关电阻阵列的第二端以及所述比较器的第一输入端连接,所述开关电阻阵列中开关的控制端与所述欠电压保护阈值控制端连接,所述第二分压电阻的第二端与所述接地端连接;所述第一控制信号用于控制所述开关电阻阵列中的至少一个开关从断开状态切换为导通状态。
在一种实现方式中,所述参考电压电路为电压源。
在一种实现方式中,所述欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端以及所述比较器的第一输入端连接,所述参考电压电路分别与所述比较器的第二输入端以及所述欠电压保护阈值控制端连接,所述比较器的输出端与所述放电控制端连接;
所述电池电压采样电路,用于对所述电池的电压进行采样;
所述参考电压电路,用于在所述第一控制信号的控制下,减小所述参考电压电路的输出电压,所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;
所述比较器,用于比较所述参考电压电路的输出电压与所述电池电压采样电路的输出电压,根据比较结果输出所述第三控制信号。
在一种实现方式中,所述电池电压采样电路包括第一采样电阻和第二采样电阻;其中,所述第一分压电阻的第一端与所述电源端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端以及所述比较器的第一输入端连接,所述第二分压电阻的第二端与所述接地端连接。
在一种实现方式中,所述参考电压电路包括多个相互并联的支路,每个支路包括电压源以及与所述电压源串联的开关;
其中,所述参考电压电路的第一端接地,所述参考电压电路的第二端与所述比较器的第二输入端连接,所述参考电压电路中的开关的控制端与所述欠电压保护阈值控制端连接;所述第一控制信号用于控制所述参考电压电路中的第一开关从导通状态切换到断开状态,控制所述参考电压电路中的第二开关从断开状态切换到导通状态,所述第一开关串联的电压源的电压大于所述第二开关串联的电压源的电压。
实施例五:
一种电池放电控制方法,其中,包括:
终端设备检测所述终端设备中电池的温度以及所述电池的放电电流;
所述终端设备在所述电池的温度小于设定的温度阈值,且所述电池的放电电流大于设定的电流阈值时,减小所述电池的欠电压保护阈值以及所述电池的放电截止电压。
在一种实现方式中,还包括:
所述终端设备在所述电池的输出电压小于所述电池的放电截止电压时,控制所述终端设备关机,增大所述电池的欠电压保护阈值以及所述电池的放电截止电压。
在一种实现方式中,还包括;
所述终端设备比较所述电池的输出电压与所述电池的欠电压保护阈值,根据比较结果控制所述电池的放电回路导通或断开。
实施例六:
一种充放电保护电路,其中,包括:电源端、接地端以及欠电压保护阈值控制端;其中,所述电源端用于连接电池的正极,所述接地端用于连接电池的负极,所述欠电压保护阈值控制端用于接收第一控制信号;
所述充放电保护电路,用于当所述电池的充放电循环次数大于设定次数,且所述电池的放电电流大于设定的电流阈值时,在所述第一控制信号的控制下,减小所述电池的欠电压保护阈值。
在一种实现方式中,所述欠电压保护阈值控制端还用于接收第二控制信号;
所述充放电保护电路还用于:当所述电池的输出电压小于所述电池的放电截止电压时,在所述第二控制信号的控制下,增大所述电池的欠电压保护阈值。
在一种实现方式中,还包括放电控制端,所述放电控制端用于输出第三控制信号;
所述充放电保护电路还用于:比较所述电池的输出电压与所述电池的欠电压保护阈值,根据比较结果输出所述第三控制信号,所述第三控制信号用于控制所述电池的放电回路导通或断开。
在一种实现方式中,包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端、所述欠电压保护阈值控制端以及所述比较器的第一输入端连接,所述参考电压电路与所述比较器的第二输入端连接,所述比较器的输出端与所述放电控制端连接;
所述电池电压采样电路,用于对所述电池的输出电压进行采样,在所述第一控制信号的控制下,增大采样电压;
所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;
所述比较器,用于比较所述参考电压电路的输出电压与增大后的所述采样电压,根据比较结果输出所述第三控制信号。
在一种实现方式中,所述电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,所述开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与所述第三分压电阻串联的开关;
其中,所述第一分压电阻的第一端分别与所述电源端以及所述开关电阻阵列的第一端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端、所述开关电阻阵列的第二端以及所述比较器的第一输入端连接,所述开关电阻阵列中开关的控制端与所述欠电压保护阈值控制端连接,所述第二分压电阻的第二端与所述接地端连接;所述第一控制信号用于控制所述开关电阻阵列中的至少一个开关从断开状态切换为导通状态。
在一种实现方式中,所述参考电压电路为电压源。
在一种实现方式中,包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端以及所述比较器的第一输入端连接,所述参考电压电路分别与所述比较器的第二输入端以及所述欠电压保护阈值控制端连接;
所述电池电压采样电路,用于对所述电池的输出电压进行采样;
所述参考电压电路,用于在所述第一控制信号的控制下,减小所述参考电压电路的输出电压;所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;
所述比较器,用于比较所述参考电压电路的输出电压与所述电池电压采样电路的输出电压,根据比较结果输出所述第三控制信号。
在一种实现方式中,所述电池电压采样电路包括第一采样电阻和第二采样电阻;其中,所述第一分压电阻的第一端与所述电源端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端以及所述比较器的第一输入端连接,所述第二分压电阻的第二端与所述接地端连接。
在一种实现方式中,所述参考电压电路包括多个相互并联的支路,每个支路包括电压源以及与所述电压源串联的开关;
其中,所述参考电压电路的第一端接地,所述参考电压电路的第二端与所述比较器的第二输入端连接,所述参考电压电路中的开关的控制端与所述欠电压保护阈值控制端连接;所述第一控制信号用于控制所述参考电压电路中的第一开关从导通状态切换到断开状态,控制所述参考电压电路中的第二开关从断开状态切换到导通状态,所述第一开关串联的电压源的电压大于所述第二开关串联的电压源的电压。
实施例七:
一种终端设备,其中,所述终端设备包括处理器和充放电保护电路,所述充放电保护电路包括电源端、接地端以及欠电压保护阈值控制端;其中,所述电源端用于连接电池的正极,所述接地端用于连接电池的负极,所述欠电压保护阈值控制端与所述处理器连接;
所述处理器,用于当所述电池的充放电循环次数大于设定次数,且所述电池的放电电流大于设定的电流阈值时,减小所述电池的放电截止电压,发送第一控制信号;
所述充放电保护电路,用于在所述第一控制信号的控制下,减小所述电池的欠电压保护阈值。
在一种实现方式中,所述处理器还用于:在所述电池的输出电压小于所述电池的放电截止电压时,控制所述终端设备关机,增大所述电池的放电截止电压,发送第二控制信号;
所述充放电保护电路还用于:在所述第二电压信号的控制下,增大所述电池的欠电压保护阈值。
在一种实现方式中,所述充放电保护电路还包括放电控制端;
所述充放电保护电路还用于:比较所述电池的输出电压与所述电池的欠电压保护阈值,根据比较结果通过所述放电控制端输出第三控制信号,所述第三控制信号用于控制所述电池的放电回路导通或断开。
在一种实现方式中,所述充放电保护电路包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端、所述欠电压保护阈值控制端以及所述比较器的第一输入端连接,所述参考电压电路与所述比较器的第二输入端连接,所述比较器的输出端与所述放电控制端连接;
所述电池电压采样电路,用于对所述电池的输出电压进行采样,在所述第一控制信号的控制下,增大采样电压;
所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;
所述比较器,用于比较所述参考电压电路的输出电压与增大后的所述采样电压,根据 比较结果输出所述第三控制信号。
在一种实现方式中,所述电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,所述开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与所述第三分压电阻串联的开关;
其中,所述第一分压电阻的第一端分别与所述电源端以及所述开关电阻阵列的第一端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端、所述开关电阻阵列的第二端以及所述比较器的第一输入端连接,所述开关电阻阵列中开关的控制端与所述欠电压保护阈值控制端连接,所述第二分压电阻的第二端与所述接地端连接;所述第一控制信号用于控制所述开关电阻阵列中的至少一个开关从断开状态切换到导通状态。
在一种实现方式中,所述参考电压电路为电压源。
在一种实现方式中,所述充放电保护电路包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端以及所述比较器的第一输入端连接,所述参考电压电路分别与所述比较器的第二输入端以及所述欠电压保护阈值控制端连接,所述比较器的输出端与所述放电控制端连接;
所述电池电压采样电路,用于对所述电池的电压进行采样;
所述参考电压电路,用于在所述第一控制信号的控制下,减小所述参考电压电路产的输出电压,所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;
所述比较器,用于比较所述参考电压电路的输出电压与所述电池电压采样电路的输出电压,根据比较结果输出所述第三控制信号。
在一种实现方式中,所述电池电压采样电路包括第一采样电阻和第二采样电阻;其中,所述第一分压电阻的第一端与所述电源端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端以及所述比较器的第一输入端连接,所述第二分压电阻的第二端与所述接地端连接。
在一种实现方式中,所述参考电压电路包括多个相互并联的支路,每个支路包括电压源以及与所述电压源串联的开关;
其中,所述参考电压电路的第一端接地,所述参考电压电路的第二端与所述比较器的第二输入端连接,所述参考电压电路中的开关的控制端与所述欠电压保护阈值控制端连接;所述第一控制信号用于控制所述参考电压电路中的第一开关从导通状态切换到断开状态,控制所述参考电压电路中的第二开关从断开状态切换到导通状态,所述第一开关串联的电压源的电压大于所述第二开关串联的电压源的电压。
实施例八:
一种充放电保护电路,其中,包括:电源端、接地端、电流采样端、控制器和欠电压保护控制电路,所述电源端用于连接电池的正极,所述接地端用于连接所述电池的负极,所述控制器分别与所述欠电压保护控制电路以及电流采样端连接;
所述控制器,用于统计所述电池的充放电循环次数,通过所述电流采样端获取所述电池的放电电流;当所述电池的充放电循环次数大于设定次数,且所述电池的放电电流大于设定的电流阈值时,发送第一控制信号;
所述欠电压保护控制电路,用于在所述第一控制信号的控制下,减小所述电池的欠电压保护阈值。
在一种实现方式中,所述控制器还用于:当所述电池的输出电压小于所述电池的放电 截止电压时,发送第二控制信号;
所述欠电压保护控制电路还用于:在所述第二控制信号的控制下,增大所述电池的欠电压保护阈值。
在一种实现方式中,还包括放电控制端,所述放电控制端与所述欠电压保护控制电路连接;
所述欠电压保护控制电路还用于:比较所述电池的输出电压与所述电池的欠电压保护阈值,根据比较结果通过所述放电控制端输出所述第三控制信号,所述第三控制信号用于控制所述电池的放电回路导通或断开。
在一种实现方式中,所述欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端、所述欠电压保护阈值控制端以及所述比较器的第一输入端连接,所述参考电压电路与所述比较器的第二输入端连接,所述比较器的输出端与所述放电控制端连接;
所述电池电压采样电路,用于对所述电池的输出电压进行采样,在所述第一控制信号的控制下,增大采样电压;
所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;
所述比较器,用于比较所述参考电压电路的输出电压与增大后的所述采样电压,根据比较结果输出所述第三控制信号。
在一种实现方式中,所述电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,所述开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与所述第三分压电阻串联的开关;
其中,所述第一分压电阻的第一端分别与所述电源端以及所述开关电阻阵列的第一端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端、所述开关电阻阵列的第二端以及所述比较器的第一输入端连接,所述开关电阻阵列中开关的控制端与所述欠电压保护阈值控制端连接,所述第二分压电阻的第二端与所述接地端连接;所述第一控制信号用于控制所述开关电阻阵列中的至少一个开关从断开状态切换到导通状态。
在一种实现方式中,所述参考电压电路为电压源。
在一种实现方式中,所述欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端以及所述比较器的第一输入端连接,所述参考电压电路分别与所述比较器的第二输入端以及所述欠电压保护阈值控制端连接;
所述电池电压采样电路,用于对所述电池的输出电压进行采样;
所述参考电压电路,用于在所述第一控制信号的控制下,减小所述参考电压电路的输出电压;所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;
所述比较器,用于比较所述参考电压电路的输出电压与所述电池电压采样电路的输出电压,根据比较结果输出所述第三控制信号。
在一种实现方式中,所述电池电压采样电路包括第一采样电阻和第二采样电阻;其中,所述第一分压电阻的第一端与所述电源端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端以及所述比较器的第一输入端连接,所述第二分压电阻的第二端与所述接地端连接。
在一种实现方式中,所述参考电压电路包括多个相互并联的支路,每个支路包括电压 源以及与所述电压源串联的开关;
其中,所述参考电压电路的第一端接地,所述参考电压电路的第二端与所述比较器的第二输入端连接,所述参考电压电路中的开关的控制端与所述欠电压保护阈值控制端连接;所述第一控制信号用于控制所述参考电压电路中的第一开关从导通状态切换到断开状态,控制所述参考电压电路中的第二开关从断开状态切换到导通状态,所述第一开关串联的电压源的电压大于所述第二开关串联的电压源的电压。
实施例九:
一种终端设备,其中,所述终端设备包括处理器和充放电保护电路;
所述处理器,用于在所述充放电保护电路连接的电池的充放电循环次数大于设定次数,且所述电池的放电电流大于设定的电流阈值时,减小所述电池的放电截止电压;
所述充放电保护电路,用于在所述电池的充放电循环次数大于设定次数,且所述电池的放电电流大于设定的电流阈值时,减小所述电池的欠电压保护阈值。
在一种实现方式中,所述处理器还用于:在所述电池的输出电压小于所述电池的放电截止电压时,控制所述终端设备关机,增大所述电池的放电截止电压;
所述充放电保护电路还用于:在所述电池的输出电压小于所述电池的放电截止电压,所述终端设备关机后,增大所述电池的欠电压保护阈值。
在一种实现方式中,所述充放电保护电路包括电源端、接地端、电流采样端、控制器和欠电压保护控制电路;其中,所述电源端用于连接所述电池的正极,所述接地端用于连接所述电池的负极,所述控制器分别与所述欠电压保护控制电路以及电流采样端连接;
所述控制器,用于统计所述电池的充放电循环次数,通过所述电流采样端获取所述电池的放电电流;当所述电池的充放电循环次数大于设定次数,且所述电池的放电电流大于设定的电流阈值时,发送第一控制信号;
所述欠电压保护控制电路,用于在所述第一控制信号的控制下,减小所述电池的欠电压保护阈值。
在一种实现方式中,所述充放电保护电路还包括放电控制端;
所述充放电保护电路还用于:比较所述电池的输出电压与所述电池的欠电压保护阈值,根据比较结果通过所述放电控制端输出第三控制信号,所述第三控制信号用于控制所述电池的放电回路导通或断开。
在一种实现方式中,所述欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端、所述欠电压保护阈值控制端以及所述比较器的第一输入端连接,所述参考电压电路与所述比较器的第二输入端连接,所述比较器的输出端与所述放电控制端连接;
所述电池电压采样电路,用于对所述电池的输出电压进行采样,在所述第一控制信号的控制下,增大采样电压;
所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;
所述比较器,用于比较所述参考电压电路的输出电压与增大后的所述采样电压,根据比较结果输出所述第三控制信号。
在一种实现方式中,所述电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,所述开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与所述第三分压电阻串联的开关;
其中,所述第一分压电阻的第一端分别与所述电源端以及所述开关电阻阵列的第一端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端、所述开关电阻阵列的第二端以及所述比较器的第一输入端连接,所述开关电阻阵列中开关的控制端与所述欠电压保护阈值控制端连接,所述第二分压电阻的第二端与所述接地端连接;所述第一控制信号用于控制所述开关电阻阵列中的至少一个开关从断开状态切换为导通状态。
在一种实现方式中,所述参考电压电路为电压源。
在一种实现方式中,所述欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端以及所述比较器的第一输入端连接,所述参考电压电路分别与所述比较器的第二输入端以及所述欠电压保护阈值控制端连接,所述比较器的输出端与所述放电控制端连接;
所述电池电压采样电路,用于对所述电池的电压进行采样;
所述参考电压电路,用于在所述第一控制信号的控制下,减小所述参考电压电路的输出电压,所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;
所述比较器,用于比较所述参考电压电路的输出电压与所述电池电压采样电路的输出电压,根据比较结果输出所述第三控制信号。
在一种实现方式中,所述电池电压采样电路包括第一采样电阻和第二采样电阻;其中,所述第一分压电阻的第一端与所述电源端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端以及所述比较器的第一输入端连接,所述第二分压电阻的第二端与所述接地端连接。
在一种实现方式中,所述参考电压电路包括多个相互并联的支路,每个支路包括电压源以及与所述电压源串联的开关;
其中,所述参考电压电路的第一端接地,所述参考电压电路的第二端与所述比较器的第二输入端连接,所述参考电压电路中的开关的控制端与所述欠电压保护阈值控制端连接;所述第一控制信号用于控制所述参考电压电路中的第一开关从导通状态切换到断开状态,控制所述参考电压电路中的第二开关从断开状态切换到导通状态,所述第一开关串联的电压源的电压大于所述第二开关串联的电压源的电压。
实施例十:
一种电池放电控制方法,其中,包括:
终端设备检测所述终端设备中电池的放电电流,并统计所述电池的充放电循环次数;
所述终端设备在所述电池的充放电循环次数大于设定次数,且所述电池的放电电流大于设定的电流阈值时,减小所述电池的欠电压保护阈值以及所述电池的放电截止电压。
在一种实现方式中,还包括:
所述终端设备在所述电池的输出电压小于所述电池的放电截止电压时,控制所述终端设备关机,增大所述电池的欠电压保护阈值以及所述电池的放电截止电压。
在一种实现方式中,还包括:
所述终端设备比较所述电池的输出电压与所述电池的欠电压保护阈值,根据比较结果,控制所述电池的放电回路导通或断开。
可以理解的,如上实施例一至十的描述,请参阅上面针对图1至图12B的描述,不再赘述。
本申请是参照根据本申请实施例的方法、设备(***)、和计算机程序产品的流程图 和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然,本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请实施例的精神和范围。这样,倘若本申请实施例的这些修改和变型属于本申请权利要求及其等同技术的范围之内,则本申请也意图包含这些改动和变型在内。
Claims (32)
- 一种充放电保护电路,其特征在于,包括:电源端、接地端以及欠电压保护阈值控制端;其中,所述电源端用于连接电池的正极,所述接地端用于连接电池的负极,所述欠电压保护阈值控制端用于接收第一控制信号;所述充放电保护电路,用于当所述电池的温度小于设定的温度阈值,且所述电池的放电电流大于设定的电流阈值时,在所述第一控制信号的控制下,减小所述电池的欠电压保护阈值。
- 如权利要求1所述的充放电保护电路,其特征在于,所述欠电压保护阈值控制端还用于接收第二控制信号;所述充放电保护电路还用于:当所述电池的输出电压小于所述电池的放电截止电压时,在所述第二控制信号的控制下,增大所述电池的欠电压保护阈值。
- 如权利要求1或2所述的充放电保护电路,其特征在于,还包括放电控制端,所述放电控制端用于输出第三控制信号;所述充放电保护电路还用于:比较所述电池的输出电压与所述电池的欠电压保护阈值,根据比较结果输出所述第三控制信号,所述第三控制信号用于控制所述电池的放电回路导通或断开。
- 如权利要求3所述的充放电保护电路,其特征在于,包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端、所述欠电压保护阈值控制端以及所述比较器的第一输入端连接,所述参考电压电路与所述比较器的第二输入端连接,所述比较器的输出端与所述放电控制端连接;所述电池电压采样电路,用于对所述电池的输出电压进行采样,在所述第一控制信号的控制下,增大采样电压;所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;所述比较器,用于比较所述参考电压电路的输出电压与增大后的所述采样电压,根据比较结果生输出述第三控制信号。
- 如权利要求4所述的放电保护电路,其特征在于,所述电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,所述开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与所述第三分压电阻串联的开关;其中,所述第一分压电阻的第一端分别与所述电源端以及所述开关电阻阵列的第一端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端、所述开关电阻阵列的第二端以及所述比较器的第一输入端连接,所述开关电阻阵列中开关的控制端与所述欠电压保护阈值控制端连接,所述第二分压电阻的第二端与所述接地端连接;所述第一控制信号用于控制所述开关电阻阵列中的至少一个开关从断开状态切换为导通状态。
- 如权利要求4或5所述的充放电保护电路,其特征在于,所述参考电压电路为电压源。
- 如权利要求3所述的充放电保护电路,其特征在于,包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端以及所述比较器的第一输入端连接,所述参考电压电路分别与所述比较器的第二输入端以及所述欠电压保护阈值控制端连接;所述电池电压采样电路,用于对所述电池的输出电压进行采样;所述参考电压电路,用于在所述第一控制信号的控制下,减小所述参考电压电路的输出电压;所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;所述比较器,用于比较所述电池电压采样电路的输出电压与所述参考电压电路的输出电压,根据比较结果输出所述第三控制信号。
- 如权利要求7所述的充放电保护电路,其特征在于,所述电池电压采样电路包括第一采样电阻和第二采样电阻;其中,所述第一分压电阻的第一端与所述电源端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端以及所述比较器的第一输入端连接,所述第二分压电阻的第二端与所述接地端连接。
- 如权利要求7或8所述的充放电保护电路,其特征在于,所述参考电压电路包括多个相互并联的支路,每个支路包括电压源以及与所述电压源串联的开关;其中,所述参考电压电路的第一端接地,所述参考电压电路的第二端与所述比较器的第二输入端连接,所述参考电压电路中的开关的控制端与所述欠电压保护阈值控制端连接;所述第一控制信号用于控制所述参考电压电路中的第一开关从导通状态切换到断开状态,控制所述参考电压电路中的第二开关从断开状态切换到导通状态,所述第一开关串联的电压源的电压大于所述第二开关串联的电压源的电压。
- 一种终端设备,其特征在于,所述终端设备包括处理器和充放电保护电路,所述充放电保护电路包括电源端、接地端以及欠电压保护阈值控制端;其中,所述电源端用于连接电池的正极,所述接地端用于连接电池的负极,所述欠电压保护阈值控制端与所述处理器连接;所述处理器,用于在所述电池的温度小于设定的温度阈值,且所述电池的放电电流大于设定的电流阈值时,减小所述电池的放电截止电压,发送第一控制信号;所述充放电保护电路,用于通过所述欠电压保护阈值控制端接收所述第一控制信号,在所述第一控制信号的控制下,减小所述电池的欠电压保护阈值。
- 如权利要求10所述的终端设备,其特征在于,所述处理器还用于:在所述电池的输出电压小于所述电池的放电截止电压时,控制所述终端设备关机,增大所述电池的放电截止电压,发送第二控制信号;所述充放电保护电路还用于:在所述第二控制信号的控制下,增大所述电池的欠电压保护阈值。
- 如权利要求10或11所述的终端设备,其特征在于,所述充放电保护电路还包括放电控制端;所述充放电保护电路还用于:比较所述电池的输出电压与所述电池的欠电压保护阈值,根据比较结果通过所述放电控制端输出第三控制信号,所述第三控制信号用于控制所述电池的放电回路导通或断开。
- 如权利要求12所述的终端设备,其特征在于,所述充放电保护电路包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端、所述欠电压保护阈值控制端以及所述比较器的第一输入端连接,所述参考电压电路与所述比较器的第二输入端连接,所述比较器的输出端与所述放电控制端连接;所述电池电压采样电路,用于对所述电池的输出电压进行采样,在所述第一控制信号的控制下,增大采样电压;所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;所述比较器,用于比较所述参考电压电路的输出电压与增大后的所述采样电压,根据比较结果输出所述第三控制信号。
- 如权利要求13所述的终端设备,其特征在于,所述电池电压采样电路包括第一分压电阻、第二分压电阻和开关电阻阵列,所述开关电阻阵列包括多个相互并联的支路,每个支路包括第三分压电阻以及与所述第三分压电阻串联的开关;其中,所述第一分压电阻的第一端分别与所述电源端以及所述开关电阻阵列的第一端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端、所述开关电阻阵列的第二端以及所述比较器的第一输入端连接,所述开关电阻阵列中开关的控制端与所述欠电压保护阈值控制端连接,所述第二分压电阻的第二端与所述接地端连接;所述第一控制信号用于控制所述开关电阻阵列中的至少一个开关从断开状态切换到导通状态。
- 如权利要求13或14所述的终端设备,其特征在于,所述参考电压电路为电压源。
- 如权利要求12所述的终端设备,其特征在于,所述充放电保护电路包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端以及所述比较器的第一输入端连接,所述参考电压电路分别与所述比较器的第二输入端以及所述欠电压保护阈值控制端连接,所述比较器的输出端与所述放电控制端连接;所述电池电压采样电路,用于对所述电池的电压进行采样;所述参考电压电路,用于在所述第一控制信号的控制下,减小所述参考电压电路的输出电压,所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;所述比较器,用于比较所述电池电压采样电路的输出电压与所述参考电压电路的输出电压,根据比较结果输出所述第三控制信号。
- 如权利要求16所述的终端设备,其特征在于,所述电池电压采样电路包括第一采样电阻和第二采样电阻;其中,所述第一分压电阻的第一端与所述电源端连接,所述第一分压电阻的第二端分别与所述第二分压电阻的第一端以及所述比较器的第一输入端连接,所述第二分压电阻的第二端与所述接地端连接。
- 如权利要求16或17所述的终端设备,其特征在于,所述参考电压电路包括多个相互并联的支路,每个支路包括电压源以及与所述电压源串联的开关;其中,所述参考电压电路的第一端接地,所述参考电压电路的第二端与所述比较器的第二输入端连接,所述参考电压电路中的开关的控制端与所述欠电压保护阈值控制端连接;所述第一控制信号用于控制所述参考电压电路中的第一开关从导通状态切换到断开状态,控制所述参考电压电路中的第二开关从断开状态切换到导通状态,所述第一开关串联的电压源的电压大于所述第二开关串联的电压源的电压。
- 一种充放电保护电路,其特征在于,包括:电源端、接地端、温度采样端、电流采样端、控制器和欠电压保护控制电路,所述电源端用于连接电池的正极,所述接地端用于连接所述电池的负极,所述控制器分别与所述欠电压保护控制电路、所述温度采样端以及电流采样端连接;所述控制器,用于通过所述温度采样端获取所述电池的温度,通过所述电流采样端获取所述电池的放电电流;当所述电池的温度小于设定的温度阈值,且所述电池的放电电流大于设定的电流阈值时,发送第一控制信号;所述欠电压保护控制电路,用于在所述第一控制信号的控制下,减小所述电池的欠电 压保护阈值。
- 如权利要求19所述的充放电保护电路,其特征在于,所述控制器还用于:当所述电池的输出电压小于所述电池的放电截止电压时,发送第二控制信号;所述欠电压保护控制电路还用于:在所述第二控制信号的控制下,增大所述电池的欠电压保护阈值。
- 如权利要求19或20所述的充放电保护电路,其特征在于,还包括放电控制端,所述放电控制端与所述欠电压保护控制电路连接;所述欠电压保护控制电路还用于:比较所述电池的输出电压与所述电池的欠电压保护阈值,根据比较结果通过所述放电控制端输出第三控制信号,第三控制信号用于控制所述电池的放电回路导通或断开。
- 如权利要求21所述的充放电保护电路,其特征在于,所述欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端、所述欠电压保护阈值控制端以及所述比较器的第一输入端连接,所述参考电压电路与所述比较器的第二输入端连接,所述比较器的输出端与所述放电控制端连接;所述电池电压采样电路,用于对所述电池的输出电压进行采样,在所述第一控制信号的控制下,增大采样电压;所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;所述比较器,用于比较所述参考电压电路的输出电压与增大后的所述采样电压,根据比较结果输出所述第三控制信号。
- 如权利要求22所述的充放电保护电路,其特征在于,所述参考电压电路为电压源。
- 一种终端设备,其特征在于,所述终端设备包括处理器和充放电保护电路;所述处理器,用于在所述充放电保护电路连接的电池的温度小于设定的温度阈值,且所述电池的放电电流大于设定的电流阈值时,减小所述电池的放电截止电压;所述充放电保护电路,用于在所述电池的温度小于设定的温度阈值,且所述电池的放电电流大于设定的电流阈值时,减小所述电池的欠电压保护阈值。
- 如权利要求24所述的终端设备,其特征在于,所述处理器还用于:在所述电池的输出电压小于所述电池的放电截止电压时,控制所述终端设备关机,增大所述电池的放电截止电压;所述充放电保护电路还用于:在所述电池的输出电压小于所述电池的放电截止电压,所述终端设备关机后,增大所述电池的欠电压保护阈值。
- 如权利要求24或25所述的终端设备,其特征在于,所述充放电保护电路包括电源端、接地端、温度采样端、电流采样端、控制器和欠电压保护控制电路;其中,所述电源端用于连接所述电池的正极,所述接地端用于连接所述电池的负极,所述控制器分别与所述欠电压保护控制电路、所述温度采样端以及电流采样端连接;所述控制器,用于通过所述温度采样端获取所述电池的温度,通过所述电流采样端获取所述电池的放电电流;当所述电池的温度小于设定的温度阈值,且所述电池的放电电流大于设定的电流阈值时,发送第一控制信号;所述欠电压保护控制电路,用于在所述第一控制信号的控制下,减小所述电池的欠电 压保护阈值。
- 如权利要求26所述的终端设备,其特征在于,所述充放电保护电路还包括放电控制端;所述欠电压保护控制电路还用于:比较所述电池的输出电压与所述电池的欠电压保护阈值,根据比较结果通过所述放电控制端输出第三控制信号,所述第三控制信号用于控制所述电池的放电回路导通或断开。
- 如权利要求27所述的终端设备,其特征在于,所述欠电压保护控制电路包括电池电压采样电路、参考电压电路和比较器,其中,所述电池采样电路分别与所述电源端、所述接地端、所述欠电压保护阈值控制端以及所述比较器的第一输入端连接,所述参考电压电路与所述比较器的第二输入端连接,所述比较器的输出端与所述放电控制端连接;所述电池电压采样电路,用于对所述电池的输出电压进行采样,在所述第一控制信号的控制下,增大采样电压;所述参考电压电路的输出电压用于表征所述电池的欠电压保护阈值;所述比较器,用于比较所述参考电压电路的输出电压与增大后的所述采样电压,根据比较结果输出所述第三控制信号。
- 如权利要求28所述的终端设备,其特征在于,所述参考电压电路为电压源。
- 一种电池放电控制方法,其特征在于,包括:终端设备检测所述终端设备中电池的温度以及所述电池的放电电流;所述终端设备在所述电池的温度小于设定的温度阈值,且所述电池的放电电流大于设定的电流阈值时,减小所述电池的欠电压保护阈值以及所述电池的放电截止电压。
- 如权利要求30所述的方法,其特征在于,还包括:所述终端设备在所述电池的输出电压小于所述电池的放电截止电压时,控制所述终端设备关机,增大所述电池的欠电压保护阈值以及所述电池的放电截止电压。
- 如权利要求30或31所述的方法,其特征在于,还包括;所述终端设备比较所述电池的输出电压与所述电池的欠电压保护阈值,根据比较结果控制所述电池的放电回路导通或断开。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1674350A (zh) * | 2004-03-16 | 2005-09-28 | 索尼株式会社 | 电池装置和电池装置的放电控制方法 |
US7348763B1 (en) * | 2002-12-20 | 2008-03-25 | Linvatec Corporation | Method for utilizing temperature to determine a battery state |
CN105742738A (zh) * | 2016-01-30 | 2016-07-06 | 清华大学 | 通过调整电池放电截止电压以增加低温放电容量的方法 |
CN106299513A (zh) * | 2016-08-30 | 2017-01-04 | 东莞新能源科技有限公司 | 一种高功率锂电池的使用方法、装置及电池管理*** |
CN108511827A (zh) * | 2018-04-03 | 2018-09-07 | 河南顺之航能源科技有限公司 | 一种锂离子电池的低温充放电方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101916887B (zh) * | 2003-10-14 | 2013-03-20 | 布莱克和戴克公司 | 电池组 |
JP4204446B2 (ja) * | 2003-11-14 | 2009-01-07 | ソニー株式会社 | バッテリパック、バッテリ保護処理装置、およびバッテリ保護処理装置の起動制御方法 |
CN101764395B (zh) * | 2010-01-14 | 2012-05-30 | 深圳市宏电技术股份有限公司 | 一种铅酸电池欠压保护方法及电源管理*** |
JP5528898B2 (ja) * | 2010-04-28 | 2014-06-25 | パナソニック株式会社 | モータ装置及び電動工具 |
CN103035969B (zh) * | 2011-09-30 | 2015-06-03 | 联想(北京)有限公司 | 一种电池控制方法、电池及电子设备 |
-
2019
- 2019-07-31 CN CN201910703892.4A patent/CN112311038B/zh active Active
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- 2020-07-31 WO PCT/CN2020/106094 patent/WO2021018272A1/zh unknown
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7348763B1 (en) * | 2002-12-20 | 2008-03-25 | Linvatec Corporation | Method for utilizing temperature to determine a battery state |
CN1674350A (zh) * | 2004-03-16 | 2005-09-28 | 索尼株式会社 | 电池装置和电池装置的放电控制方法 |
CN105742738A (zh) * | 2016-01-30 | 2016-07-06 | 清华大学 | 通过调整电池放电截止电压以增加低温放电容量的方法 |
CN106299513A (zh) * | 2016-08-30 | 2017-01-04 | 东莞新能源科技有限公司 | 一种高功率锂电池的使用方法、装置及电池管理*** |
CN108511827A (zh) * | 2018-04-03 | 2018-09-07 | 河南顺之航能源科技有限公司 | 一种锂离子电池的低温充放电方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP4002545A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115236481A (zh) * | 2022-05-24 | 2022-10-25 | 上海沛塬电子有限公司 | 一种高精度电流检测方法及其芯片模组 |
CN115236481B (zh) * | 2022-05-24 | 2023-10-27 | 上海沛塬电子有限公司 | 一种高精度电流检测方法及其芯片模组 |
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