CN219875197U - Direct current power supply management device based on autonomous lithium battery switching - Google Patents
Direct current power supply management device based on autonomous lithium battery switching Download PDFInfo
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- CN219875197U CN219875197U CN202321301670.8U CN202321301670U CN219875197U CN 219875197 U CN219875197 U CN 219875197U CN 202321301670 U CN202321301670 U CN 202321301670U CN 219875197 U CN219875197 U CN 219875197U
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 18
- 238000007600 charging Methods 0.000 claims abstract description 22
- 238000012545 processing Methods 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 230000009471 action Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- 238000010277 constant-current charging Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 8
- 230000009977 dual effect Effects 0.000 abstract description 3
- 230000002457 bidirectional effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 9
- 238000012544 monitoring process Methods 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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Abstract
The utility model provides a direct current power supply management device based on autonomous switching of a lithium battery, which is divided into two paths of power supply input and is used for supplying power to direct current electric equipment, wherein one path is the switching power supply input and is directly used for supplying power to the direct current electric equipment; the other path is standby power input, when the switching power input is abnormal, the switching power is switched to standby power supply through the controller, and the standby power supply supplies power to the direct current electric equipment through the booster circuit. The device comprises a power supply signal processing circuit, a charging management circuit, a boosting circuit, a step-down circuit, a comparator, a current sensing amplifier, a sampling resistor, a photoelectric coupler, a triode, a P-MOS tube and a controller; the bidirectional uninterrupted power supply function of the switching power supply and the standby power supply can be realized, the state of the switching power supply is monitored through the comparator, when the state of the switching power supply is abnormal, the power supply state IO outputs high level, and the standby power supply is controlled by the triode, the optocoupler isolator and the P-MOS tube to realize the autonomous switching of the dual power supply through the booster circuit.
Description
Technical Field
The utility model belongs to the technical field of automatic control of systems, and particularly relates to a direct current power supply management device based on autonomous switching of lithium batteries.
Background
Along with the development of industrial automation control and production safety, sensors are arranged in factories aiming at field process equipment and special environments to monitor the environments, so that the normal production environment is ensured, the normal power supply of a system is ensured preferentially for the normal operation of the sensors, and the normal operation of the sensors and related linkage actions is not influenced after the abnormal disconnection of the commercial power in the field, so that the continuous monitoring action is ensured. For the electric equipment which can cause great economic loss and even safety accidents after the power supply system is interrupted, in order to improve the reliability of power supply, a common scheme is to add a UPS uninterrupted power supply between the electric equipment and a power supply, and the scheme has the defects of low conversion efficiency, large volume, high cost, long switching time and the like, and is generally not suitable for the monitoring of a general sensor or a small system, and the equipment is operated by adopting DC24V power supply.
Disclosure of Invention
Based on the above problems, the present utility model provides a dc power management device based on autonomous switching of lithium batteries, comprising: the power supply signal processing circuit, the charging management circuit, the voltage boosting circuit, the voltage reducing circuit, the comparator, the current sensing amplifier, the sampling resistor, the first photoelectric coupler, the second photoelectric coupler, the first triode, the second triode, the P-MOS tube and the controller; one path of a group of normally open contacts of the switch button is connected with the input end of the power signal processing circuit, and the other path of normally open contacts of the switch button is connected with the negative end of the comparator after being divided by a resistor; one path of the output end of the power signal processing circuit is connected with the input end of the voltage reduction circuit, the other path of the output end of the power signal processing circuit is connected with the direct current electric equipment, and the other path of the output end of the power signal processing circuit is connected with the charging management circuit; the step-down circuit outputs two paths of different direct current level signals for providing different power supply voltages; the output end of the comparator is connected with the cathode of the first photoelectric coupler, and the collector of the first photoelectric coupler is connected with the input end of the controller; the output end of the charging management circuit is connected with a standby power supply, the standby power supply is connected with one end of a sampling resistor, the other end of the sampling resistor is connected with a source stage of a P-MOS tube, a drain stage of the P-MOS tube is connected with an input end of a booster circuit, an output end of the booster circuit is connected with direct current electric equipment, a grid stage of the P-MOS tube is connected with a collector electrode of a second photoelectric coupler, a negative electrode of the second photoelectric coupler is connected with a collector electrode of a first triode, a base electrode of the first triode is connected with a negative electrode of the first photoelectric coupler, a collector electrode of the second triode is connected with a base electrode of the first triode, and a base electrode of the second triode is connected with an output end of a controller; the input end of the current sense amplifier is respectively connected with two ends of the resistor, and the output end of the current sense amplifier is connected with the controller through a serial bus.
The group of normally closed contacts of the switch button are connected with the input end of the controller and are used for judging whether the button action is executed or not; and the group of normally open contacts are connected with the switching power supply and are used for controlling the switching power supply to be switched on and off.
The step-down circuit outputs two-stage step-down voltages, a first-stage output end of the step-down circuit is respectively connected with the positive end of the comparator, the positive electrode of the first photoelectric coupler and the positive electrode of the second photoelectric coupler, and a second-stage output end of the step-down circuit is respectively connected with one end of the switch button, a power supply port of the controller and a collector electrode of the first photoelectric coupler;
the power supply signal processing circuit is used for sequentially carrying out current limiting protection, shaping, coupling, filtering and then outputting to equipment for supplying power and charging a standby power supply on an input power supply signal;
the charging management circuit is used for constant-current charging and has over-temperature protection, over-charge protection and charging state indication functions;
the booster circuit is used for realizing booster output of the standby power supply to direct current 24V, so as to meet the power supply requirement of a user;
the step-down circuit is used for realizing two-stage step-down and respectively outputting power supply voltages of direct current 5V and direct current DC 3.3V.
The current sense amplifier is INA219, the standby power supply is a lithium battery module, and when the INA219 detects that the current voltage value of the lithium battery module is lower than the lowest discharge voltage value, the second triode is controlled to be cut off through the controller.
The beneficial effects of the utility model are as follows:
the utility model realizes the uninterrupted power supply function of the direct current electric equipment by monitoring the switching power supply and the standby power supply (lithium battery module) through the controller, and when the power supply of the user equipment is abnormal, the power supply mode can be switched between the switching power supply and the standby power supply automatically and instantaneously, thereby ensuring the uninterrupted power supply of the equipment, and the functions of remote standby power supply switching, electric quantity monitoring and the like can be realized by a user through the device.
Drawings
Fig. 1 is a schematic diagram of a dc power management device based on autonomous switching of lithium batteries in the present utility model.
Fig. 2 is a schematic diagram of a power signal processing circuit according to the present utility model.
Fig. 3 is a schematic diagram of a charge management circuit according to the present utility model.
Fig. 4 is a schematic diagram of a boost circuit in the present utility model.
Fig. 5 is a schematic diagram of a step-down circuit according to the present utility model.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and examples of specific embodiments.
The utility model provides a direct current power supply management device based on autonomous switching of a lithium battery, which is input by two paths of power supplies, and supplies power to direct current electric equipment, wherein one path is a switching power supply and is commonly used power supply input; the other path is a standby power supply, when the input of the switching power supply is abnormal, the device can be automatically switched to the standby power supply to supply power, and DC24V power is supplied to the direct current electric equipment through the booster circuit. The MCU control unit is arranged in the device, and the abnormal state monitoring, the standby power supply remote control and the standby power supply electric quantity monitoring functions of the switching power supply can be realized through the state monitoring of IO.
As shown in fig. 1, the dc power management apparatus includes: the power supply signal processing circuit, the charging management circuit, the voltage boosting circuit, the voltage reducing circuit, the comparator, the current sensing amplifier, the sampling resistor, the first photoelectric coupler, the second photoelectric coupler, the first triode, the second triode, the P-MOS tube and the controller; one path of a group of normally open contacts of the switch button is connected with the input end of the power signal processing circuit, and the other path of normally open contacts of the switch button is connected with the negative end of the comparator after being divided by a resistor; one path of the output end of the power signal processing circuit is connected with the input end of the voltage reduction circuit, the other path of the output end of the power signal processing circuit is connected with the direct current electric equipment, and the other path of the output end of the power signal processing circuit is connected with the charging management circuit; a group of normally closed contacts of the switch button are connected with the input end of the controller; the step-down circuit outputs two paths of different direct current level signals for providing different power supply voltages; the output end of the comparator is connected with the cathode of the first photoelectric coupler, and the collector of the first photoelectric coupler is connected with the input end of the controller; the output end of the charging management circuit is connected with a standby power supply, the standby power supply is connected with one end of a sampling resistor, the other end of the sampling resistor is connected with a source stage of a P-MOS tube, a drain stage of the P-MOS tube is connected with an input end of a booster circuit, an output end of the booster circuit is connected with direct current electric equipment, a grid stage of the P-MOS tube is connected with a collector electrode of a second photoelectric coupler, a negative electrode of the second photoelectric coupler is connected with a collector electrode of a first triode, a base electrode of the first triode is connected with a negative electrode of the first photoelectric coupler, a collector electrode of the second triode is connected with a base electrode of the first triode, and a base electrode of the second triode is connected with an output end of a controller; the input end of the current sense amplifier is respectively connected with two ends of the resistor, and the output end of the current sense amplifier is connected with the controller through a serial bus.
The step-down circuit outputs two-stage step-down voltages, a first-stage output end of the step-down circuit is respectively connected with the positive end of the comparator, the positive electrode of the first photoelectric coupler and the positive electrode of the second photoelectric coupler, and a second-stage output end of the step-down circuit is respectively connected with one end of the switch button, a power supply port of the controller and a collector electrode of the first photoelectric coupler;
the controller is used for automatically switching the power supply of the dual power supply, when the power supply of the switching power supply is normal, the positive end of the comparator is smaller than the negative end, the power supply state of the switching power supply is low level, one path of signal controls the first opto-coupler isolator to be started, the controller monitors the state IO to be low level, the other path of signal controls the second opto-coupler isolator to be closed through the first triode, the P-MOS tube is in a cut-off state, the controller outputs a standby power supply remote control interface to be low level, and the direct current electric equipment is powered through the switching power supply; when the power supply of the switching power supply is abnormal, the positive end of the comparator is larger than the negative end, the power supply state of the switching power supply is high, one path of signal controls the first optocoupler isolator to be closed, the monitoring state IO of the controller is high, the other path of signal controls the second optocoupler isolator to be opened through the first triode, the P-MOS tube is in a conducting state, the standby power supply is started to output, the standby power supply of the controller remotely controls the IO interface to output to be low, and the direct current electric equipment is powered through the standby power supply through the booster circuit. When the power supply of the switching power supply is recovered from abnormality to be normal, the negative end of the comparator is larger than the positive end, the power supply state of the switching power supply is changed from high level to low level, one path of signal controls the first optocoupler isolator to be started, the controller monitors that the state IO is low level, the other path of signal controls the second optocoupler isolator to be closed through the first triode, the P-MOS tube is changed into cut-off state, the standby power supply output is closed, the standby power supply remote control IO interface output of the controller is low level, and the direct current electric equipment is powered through the switching power supply.
When an operator switches on and off the switching power supply through the switching button, the controller monitors that the normally closed signal state IO of the switching button is low level, the controller MCU considers that the equipment normally cuts off power supply, and the standby power supply remotely controls IO to output high level to control the standby power supply to cut off power supply. When an operator does not power off the switching power supply through the switch button, the controller monitors that the normally-closed signal state IO of the switch button is high level, the MCU considers that the equipment is abnormally powered off, the standby power supply remotely controls IO to output low level, and the standby power supply is kept to supply power to the electric equipment.
When the standby power supply is started to supply power, the controller monitors the voltage and current states of the standby power supply through the 0.1R sampling resistor and the current sense amplifier INA 219.
The power supply signal processing circuit is used for sequentially carrying out current limiting protection, shaping, coupling, filtering and then outputting power supply to the equipment and charging a standby power supply; the circuit realizes current limiting protection through the self-recovery fuse, realizes coupling through the common-mode inductor and the bypass capacitor, realizes the pi-type filter circuit through the combination of the inductor and the capacitor, and performs optimization processing on an output power supply signal, and a specific circuit diagram is shown in fig. 2.
The CN3704 chip adopted by the charging management circuit can realize constant-current charging of the lithium battery, has over-temperature protection, over-charge protection and charging state indication functions, and has charging current of 2A; the circuit design is based on a CN3704 user manual, the limitation of charging current is realized through an R7 circuit, the indication of the charging management state is realized through green and red indicator lights, and a specific circuit diagram is shown in fig. 3.
The boosting circuit adopts an XL6019 chip, can realize boosting output of a standby power supply to DC24V, and meets the power supply requirement of a user; the circuit realizes the output of direct current 24V mainly through the matching of the resistance values of R32 and R33, and a specific circuit diagram is shown in fig. 4.
The voltage reduction circuit adopts XL1509_5.0E1 and XL1509_3.3E1, can realize DC5V and DC3V3 voltage output in the device and provides power supply voltage; the chip selected by the circuit is constant voltage output, and the required voltage can be output by direct power supply, and a specific circuit diagram is shown in fig. 5.
The device provided by the utility model can realize the bidirectional uninterrupted power supply function of the system power supply and the standby power supply, when the switching power supply is abnormally powered off, the LM393 comparator monitors the output level state of the switching power supply, when abnormal power supply occurs, the power supply state IO outputs high level, the standby power supply is controlled by the triode and the optocoupler isolator to realize the autonomous switching of the dual power supply through the booster circuit, and the automatic switching response time of the power supply is within 100 us; when the switching power supply is normally powered off, the IO output high level can be controlled remotely through the standby power supply, so that the signal output control of the standby power supply is realized, and the power supply stopping of the standby power supply is realized. The controller can monitor the voltage and current of the standby power supply through an INA219 chip (operational amplifier) and a sampling resistor, monitor the discharge condition of the standby power supply in real time, and remotely control IO output high level through the standby power supply when the discharge of the standby power supply is lower than the minimum discharge value, so as to stop the power supply of the standby power supply.
Claims (5)
1. A direct current power supply management device based on autonomous switching of lithium batteries, comprising: the power supply signal processing circuit, the charging management circuit, the voltage boosting circuit, the voltage reducing circuit, the comparator, the current sensing amplifier, the sampling resistor, the first photoelectric coupler, the second photoelectric coupler, the first triode, the second triode, the P-MOS tube and the controller; one path of a group of normally open contacts of the switch button is connected with the input end of the power signal processing circuit, and the other path of normally open contacts of the switch button is connected with the negative end of the comparator after being divided by a resistor; one path of the output end of the power signal processing circuit is connected with the input end of the voltage reduction circuit, the other path of the output end of the power signal processing circuit is connected with the direct current electric equipment, and the other path of the output end of the power signal processing circuit is connected with the charging management circuit; the step-down circuit outputs two paths of different direct current level signals for providing different power supply voltages; the output end of the comparator is connected with the cathode of the first photoelectric coupler, and the collector of the first photoelectric coupler is connected with the input end of the controller; the output end of the charging management circuit is connected with a standby power supply, the standby power supply is connected with one end of a sampling resistor, the other end of the sampling resistor is connected with a source stage of a P-MOS tube, a drain stage of the P-MOS tube is connected with an input end of a booster circuit, an output end of the booster circuit is connected with direct current electric equipment, a grid stage of the P-MOS tube is connected with a collector electrode of a second photoelectric coupler, a negative electrode of the second photoelectric coupler is connected with a collector electrode of a first triode, a base electrode of the first triode is connected with a negative electrode of the first photoelectric coupler, a collector electrode of the second triode is connected with a base electrode of the first triode, and a base electrode of the second triode is connected with an output end of a controller; the input end of the current sense amplifier is respectively connected with two ends of the resistor, and the output end of the current sense amplifier is connected with the controller through a serial bus.
2. The direct current power supply management device based on autonomous switching of a lithium battery according to claim 1, wherein a set of normally closed contacts of the switch button are connected with an input end of the controller for judging whether to execute button actions; and the group of normally open contacts are connected with the switching power supply and are used for controlling the switching power supply to be switched on and off.
3. The direct current power supply management device based on autonomous lithium battery switching according to claim 1, wherein the step-down circuit outputs two-stage step-down voltage, a first-stage output end of the step-down circuit is respectively connected with a positive end of the comparator, a positive electrode of the first photoelectric coupler and a positive electrode of the second photoelectric coupler, and a second-stage output end of the step-down circuit is respectively connected with one end of the switch button, a power supply port of the controller and a collector electrode of the first photoelectric coupler.
4. The direct current power supply management device based on autonomous lithium battery switching according to claim 1, wherein the power supply signal processing circuit is used for sequentially performing current limiting protection, shaping, coupling, filtering, and then outputting to equipment for power supply and standby power supply for charging;
the charging management circuit is used for constant-current charging and has over-temperature protection, over-charge protection and charging state indication functions;
the booster circuit is used for realizing booster output of the standby power supply to direct current 24V, so as to meet the power supply requirement of a user;
the step-down circuit is used for realizing two-stage step-down and respectively outputting power supply voltages of direct current 5V and direct current DC 3.3V.
5. The direct current power management device based on autonomous switching of lithium batteries according to claim 1, wherein the current sense amplifier is an INA219, the standby power is a lithium battery module, and the controller controls the second triode to be turned off when the INA219 detects that the current voltage value of the lithium battery module is lower than the lowest discharge voltage value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321301670.8U CN219875197U (en) | 2023-05-26 | 2023-05-26 | Direct current power supply management device based on autonomous lithium battery switching |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321301670.8U CN219875197U (en) | 2023-05-26 | 2023-05-26 | Direct current power supply management device based on autonomous lithium battery switching |
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| CN219875197U true CN219875197U (en) | 2023-10-20 |
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| CN202321301670.8U Active CN219875197U (en) | 2023-05-26 | 2023-05-26 | Direct current power supply management device based on autonomous lithium battery switching |
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- 2023-05-26 CN CN202321301670.8U patent/CN219875197U/en active Active
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