CN115001062B

CN115001062B - Charging management circuit and electronic device

Info

Publication number: CN115001062B
Application number: CN202111060631.9A
Authority: CN
Inventors: 周福勇
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2023-04-14
Anticipated expiration: 2041-09-10
Also published as: CN115001062A

Abstract

The application provides a charge management circuit and electronic equipment, wherein: the charging management circuit is applied to an electronic device, the electronic device comprises a battery, and the charging management circuit comprises: the plurality of parallel capacitors are connected with the battery and the power supply through the switch tubes; when the battery is not charged by the power supply and the battery is in a low-temperature state or a low-power state, at least part of the switch tubes is conducted, so that the battery is communicated with the capacitors connected in parallel. This is so: the capacitor is communicated with the battery, after the capacitor is instantly charged by the battery, the capacitor discharges to assist the battery or replace the battery to provide current for parts of the electronic equipment, and the problem that the electronic equipment is shut down due to the fact that the battery needs large current at low temperature or low electric quantity and cannot provide the large current can be avoided. And moreover, the capacitor is communicated with the battery, and after the battery charges the capacitor, the current discharged by the capacitor can provide electric energy for the electronic equipment, and the standby time is also prolonged.

Description

Charging management circuit and electronic device

Technical Field

The present invention relates to the field of charging technologies, and in particular, to a charging management circuit and an electronic device.

Background

An electronic device such as a mobile phone is provided with a charging circuit and a battery, wherein the charging circuit can be externally connected with a charger to charge the battery, and the battery is used for supplying power to the electronic device. However, when the battery is in a low state or a low temperature state, the battery has insufficient activity and large internal resistance, and cannot output a large current. Once the electronic device needs a large current, for example, when a call is connected, the electronic device is turned off because the battery cannot supply a large current.

Disclosure of Invention

The application provides a charging management circuit and electronic equipment to solve the problem that the battery can not provide great current and leads to the electronic equipment to shut down when the battery is in a low temperature or low electric quantity state.

In order to achieve the purpose, the invention provides the following technical scheme:

in a first aspect, the present application provides a charging management circuit applied to an electronic device, the electronic device including a battery, the charging management circuit including: the plurality of parallel capacitors are connected with the battery and the power supply through the switch tubes; when the battery is not charged by the power supply and the battery is in a low-temperature state or a low-power state, at least part of the switch tubes is conducted, so that the battery is communicated with the capacitors connected in parallel.

From the above, it can be seen that: when the battery is not charged and the battery is in a low-temperature state or a low-power state, the switch tube is at least partially conducted to enable the capacitor to be communicated with the battery, after the capacitor is charged by the battery instantly, the capacitor discharges to assist the battery or replace the battery to provide current for components of the electronic equipment, and the problem that the electronic equipment is shut down due to the fact that the battery is low-temperature or low-power and the large current cannot be provided can be avoided when the electronic equipment needs large current. And moreover, the capacitor is communicated with the battery, and after the battery charges the capacitor, the current discharged by the capacitor can provide electric energy for the electronic equipment, and the standby time is also prolonged.

In one possible embodiment, the plurality of switching tubes of the charge management circuit includes a first group of switching tubes for connecting the power supply and the plurality of capacitors in parallel, and a second group of switching tubes for connecting the plurality of capacitors in parallel and the battery; wherein: when the battery is not charged and the battery is in a low-temperature state or a low-power state, the second group of switch tubes are conducted to communicate the battery and the plurality of capacitors connected in parallel.

In a possible embodiment, when the battery is charged by the power supply, the first group of switching tubes and the second group of switching tubes are controlled to be conducted in a time-sharing manner, when the first group of switching tubes are conducted, the capacitor is charged by the power supply, and when the second group of switching tubes are conducted, the capacitor is discharged to charge the battery.

In one possible embodiment, the plurality of switching tubes of the charge management circuit and the plurality of capacitors connected in parallel form a fast charge circuit, and the fast charge circuit is used for fast charging the battery.

In this possible embodiment, the switch tube in the fast charging circuit is controlled to communicate the capacitor and the battery in the fast charging circuit, the capacitor in the fast charging circuit assists the battery or replaces the battery to supply current to the components of the electronic device, and on the premise that no additional components are introduced to the electronic device, shutdown of the electronic device due to the fact that the battery cannot supply large current at low temperature or low electric quantity and standby time of the electronic device is prolonged due to the fact that the electronic device needs large current are avoided.

In one possible embodiment, the plurality of switching tubes includes: the first switching tube, the second switching tube, the third switching tube and the fourth switching tube are connected in series; the input end of the first switch tube is connected with a power supply, and the connecting end of the first switch tube and the second switch tube is connected with one end of each capacitor; the connection end of the third switching tube and the fourth switching tube is connected with the other end of each capacitor, and the output end of the fourth switching tube is grounded; the connection end of the second switching tube and the third switching tube is connected with the battery.

In one possible implementation, the charge management circuit further includes: and the controller is used for controlling the switch tube to communicate the battery and the plurality of capacitors connected in parallel when the battery is determined not to be charged by the power supply and is in a low-temperature state or a low-power state.

In one possible implementation, the charge management circuit further includes: and the controller is used for controlling the conduction of the second switching tube and the fourth switching tube to communicate the battery and the plurality of capacitors connected in parallel when the battery is determined not to be charged by the power supply and is in a low-temperature state or a low-electric-quantity state.

In one possible embodiment, the controller is configured to: the power pin of the charging interface of the electronic device is detected to generate a low level signal to determine that the battery is not charged by the power supply.

In one possible embodiment, the controller is configured to: acquiring a detection signal of a temperature sensor; and judging that the temperature of the electronic equipment is lower than a threshold value by using a detection signal of the temperature sensor so as to determine that the battery is in a low-temperature state.

In one possible embodiment, the controller is configured to: acquiring the battery capacity monitored by a power management module; and judging that the battery capacity is smaller than a preset capacity value, or judging that the voltage of the battery is smaller than a preset value by using the battery capacity so as to determine that the battery is in a low-power state.

In one possible embodiment, the plurality of switching tubes are configured to be connected to a processor of the electronic device, the processor being configured to: and when the battery is determined not to be charged by the power supply and is in a low-temperature state or a low-power state, the switch tube is controlled to be communicated with the battery and the plurality of capacitors connected in parallel.

In one possible embodiment, the second switching tube and the fourth switching tube are configured to be connected to a processor of the electronic device, and the processor is configured to control the second switching tube and the fourth switching tube to be conducted to communicate the battery and the plurality of capacitors connected in parallel when the processor determines that the battery is not charged by the power supply and the battery is in a low temperature state or a low battery state.

In one possible implementation, the charge management circuit further includes: and the boosting module is connected with the control end of the second switching tube and used for boosting the received control signal to the conduction voltage of the second switching tube.

In one possible implementation, the boost module includes: an energy storage element and a voltage boosting element connected to each other, wherein: the energy storage element stores energy after receiving the electric signal; the voltage boosting element boosts the output voltage of the energy storage element to the conducting voltage of the second switching tube.

In one possible embodiment, the energy storage element comprises: the capacitor and the inductor are connected, and the common end of the capacitor and the inductor receives an electric signal; one end of the capacitor, which is not connected with the inductor, is grounded; one end of the inductor, which is not connected with the capacitor, is connected with the voltage boosting element.

In a second aspect, the present application provides an electronic device comprising: a temperature sensor for detecting a temperature of the electronic device; the power management module is used for monitoring the battery to obtain the battery capacity; a battery, and a charge management circuit connected to the battery, the charge management circuit being as described in the first aspect and any one of its possible embodiments.

From the above, it can be seen that: in the electronic equipment, when the battery is not charged and the battery is in a low-temperature state or a low-power state, the switch tube is communicated with the capacitor and the battery, after the capacitor is charged by the battery instantly, the capacitor discharges the auxiliary battery or replaces the battery to provide current for parts of the electronic equipment, and the problem that the electronic equipment is shut down due to the fact that the battery is low-temperature or low-power and cannot provide the large current can be avoided when the electronic equipment needs the large current. And moreover, the capacitor is communicated with the battery, and after the battery charges the capacitor, the current discharged by the capacitor can provide electric energy for the electronic equipment, and the standby time is also prolonged.

In a third aspect, the present application provides a charging control method applied to an electronic device, where the electronic device includes a battery and a charging management circuit, and the charging management circuit includes: the charging control method comprises the following steps of: determining that the battery is not charged by the power supply and when the battery is determined to be in a low temperature state or a low power state; the control switch tube is communicated with the battery and the plurality of capacitors connected in parallel.

From the above, it can be seen that: in the charging control method, when the battery is determined not to be charged and is in a low-temperature state or a low-power state, the control switch tube is communicated with the capacitor and the battery, and after the capacitor is instantly charged by the battery, the capacitor discharges to assist the battery or replace the battery to supply current to components of the electronic equipment, so that the problem that the electronic equipment is shut down due to the fact that the battery cannot supply large current at low temperature or low power can be avoided when the electronic equipment needs large current. And the capacitor is communicated with the battery, and after the battery charges the capacitor, the current discharged by the capacitor can provide electric energy for the electronic equipment, and the standby time is also prolonged.

In one possible embodiment, the plurality of switching tubes comprises: the first switching tube, the second switching tube, the third switching tube and the fourth switching tube are connected in series; the input end of the first switching tube is connected with a power supply of the electronic equipment, and the connecting end of the first switching tube and the second switching tube is connected with one end of each capacitor; the connection end of the third switching tube and the fourth switching tube is connected with the other end of each capacitor, and the output end of the fourth switching tube is grounded; the connection end of the second switching tube and the third switching tube is connected with the battery.

In one possible embodiment, determining that the battery is not charged by the power source comprises: and detecting that a power supply pin of a charging interface of the electronic equipment generates a low-level signal.

In one possible embodiment, determining that the battery is in the low temperature state includes: acquiring a detection signal of a temperature sensor; and judging that the temperature of the electronic equipment is lower than the threshold value by using a detection signal of the temperature sensor.

In one possible embodiment, determining that the battery is in the low state of charge includes: acquiring battery capacity monitored by a power management module; and judging that the battery capacity is smaller than a preset capacity value, or judging that the voltage of the battery is smaller than a preset value by using the battery capacity.

Drawings

Fig. 1 is a schematic composition diagram of a hardware structure of an electronic device according to an embodiment of the present disclosure;

fig. 2 is a schematic circuit diagram of a fast charging circuit according to an embodiment of the present disclosure;

fig. 3a is a schematic circuit diagram illustrating an operating condition of a fast charging circuit according to an embodiment of the present disclosure;

fig. 3b is an equivalent circuit diagram of a fast charging circuit according to an embodiment of the present disclosure;

fig. 4a is a schematic circuit diagram illustrating another operating condition of a fast charging circuit according to an embodiment of the present disclosure;

fig. 4b is another equivalent circuit diagram of a fast charging circuit provided in the embodiment of the present application;

fig. 5a is a schematic circuit diagram of a fast charging circuit according to another embodiment of the present application;

fig. 5b is a schematic circuit diagram of a boost module according to an embodiment of the present disclosure;

fig. 6a is a schematic circuit diagram illustrating an operating condition of a fast charging circuit according to an embodiment of the present application;

fig. 6b is an equivalent circuit diagram of a fast charging circuit according to an embodiment of the present application;

fig. 7 is a circuit schematic diagram of a fast charging circuit according to another embodiment of the present application;

fig. 8a is a schematic circuit diagram illustrating an operating condition of a fast charging circuit according to an embodiment of the present application;

fig. 8b is an equivalent circuit diagram of a fast charging circuit according to an embodiment of the present application;

fig. 9a and 9b are schematic circuit diagrams of a fast charging circuit provided in an embodiment of the present application;

fig. 10 is a schematic flowchart of a battery power supply control method according to an embodiment of the present application.

Detailed Description

The terms "first", "second" and "third", etc. in the description and claims of this application and the description of the drawings are used for distinguishing between different objects and not for limiting a particular order.

In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

Fig. 1 shows a schematic structural diagram of an electronic device 100. The electronic device 100 may be a mobile phone, a tablet Computer, a desktop, a laptop, a notebook, an Ultra-mobile Personal Computer (UMPC), a handheld Computer, a netbook, a Personal Digital Assistant (PDA), a wearable electronic device, a smart watch, and the like.

The electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a Universal Serial Bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, a temperature sensor 170, and the like.

It is to be understood that the illustrated structure of the embodiment of the present application does not specifically limit the electronic device 100. In other embodiments of the present application, electronic device 100 may include more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

Processor 110 may include one or more processing units, such as: the processor 110 may include an Application Processor (AP), a modem processor, a Graphics Processor (GPU), an Image Signal Processor (ISP), a controller, a memory, a video codec, a Digital Signal Processor (DSP), a baseband processor, and/or a neural-Network Processing Unit (NPU), among others. Wherein, the different processing units may be independent devices or may be integrated in one or more processors. The processor may be, among other things, a neural center and a command center of the electronic device 100. The processor can generate an operation control signal according to the instruction operation code and the timing signal to complete the control of instruction fetching and instruction execution.

A memory may also be provided in processor 110 for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may hold instructions or data that have just been used or recycled by the processor 110. If the processor 110 needs to reuse the instruction or data, it can be called directly from memory. Avoiding repeated accesses reduces the latency of the processor 110, thereby increasing the efficiency of the system.

The charging management module 140 is configured to receive a charging input from a charger or receive a charging input in a wireless charging manner. The charging management module 140 may also supply power to the electronic device through the power management module 141 while charging the battery 142. The power management module 141 is used to connect the battery 142, the charging management module 140 and the processor 110. The power management module 141 receives an input of the battery 142 and/or the charge management module 140, and supplies power to the processor 110, the internal memory 121, the external memory, the wireless communication module 160, and the like. The power management module 141 may also be used to monitor parameters such as battery capacity, battery cycle count, battery state of health (leakage, impedance), etc. In other embodiments, the power management module 141 may be disposed in the processor 110. In other embodiments, the power management module 141 and the charging management module 140 may also be disposed in the same device.

The wireless communication function of the electronic device 100 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, a modem processor, a baseband processor, and the like. The

antennas

1 and 2 are used for transmitting and receiving electromagnetic wave signals. The mobile communication module 150 may provide a solution including 2G/3G/4G/5G wireless communication applied to the electronic device 100. The mobile communication module 150 may include at least one filter, a switch, a power amplifier, a Low Noise Amplifier (LNA), and the like. The mobile communication module 150 may receive the electromagnetic wave from the antenna 1, filter, amplify, etc. the received electromagnetic wave, and transmit the electromagnetic wave to the modem processor for demodulation. The mobile communication module 150 may also amplify the signal modulated by the modem processor, and convert the signal into electromagnetic wave through the antenna 1 to radiate the electromagnetic wave. The modem processor may include a modulator and a demodulator.

The internal memory 121 may be used to store computer-executable program code, which includes instructions. The processor 110 executes various functional applications of the electronic device 100 and data processing by executing instructions stored in the internal memory 121. The internal memory 121 may include a program storage area and a data storage area. The storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required by at least one function, and the like. The storage data area may store data (such as audio data, phone book, etc.) created during use of the electronic device 100, and the like. In addition, the internal memory 121 may include a high-speed random access memory, and may further include a nonvolatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (UFS), and the like.

The temperature sensor 170 is used to detect temperature. In some embodiments, the electronic device 100 implements a temperature processing strategy using the temperature detected by the temperature sensor 170.

In the electronic device shown in fig. 1, when the battery 142 is in a low state or a low temperature state, the battery has insufficient activity and large internal resistance, and cannot output a large current. When the electronic device needs a large current, for example, a call is connected, the battery cannot supply the large current, which may cause the electronic device to shut down.

Example one

It should be noted that, in the electronic device shown in fig. 1, the charging management module 140 is generally provided with a charging circuit for charging the electronic device 142 conventionally. In some embodiments, the charging management module 140 may further provide a fast charging circuit, which is used to complete the fast charging of the battery 142 of the electronic device.

Fig. 2 shows a circuit diagram of a fast charging circuit, which can charge a battery with a power supply voltage in two stages as follows.

The first stage is as follows: the power supply voltage charges the capacitor of the quick charging circuit. Specifically, as shown in fig. 3a, when the power supply of the electronic device is powered on, the switching tube Q1 and the switching tube Q3 are controlled to be turned on, and the switching tube Q2 and the switching tube Q4 are controlled to be turned off. The power supply voltage VBUS charges the capacitor through the switching tube Q1 and the switching tube Q3. The equivalent circuit of the fast charging circuit in the first stage is shown in fig. 3b, the capacitor CFLY is charged with the power supply voltage VBUS, the potential difference VCFLY across the capacitor CFLY gradually increases, and when the potential difference VCFLY across the capacitor increases to be equal to the power supply voltage VBUS, the charging of the capacitor is completed. And the quick charging circuit enters a second stage.

And a second stage: and the capacitor of the quick charging circuit discharges to charge the battery. Specifically, as shown in fig. 4a, the switching tube Q1 and the switching tube Q3 are controlled to be turned off, the switching tube Q2 and the switching tube Q4 are controlled to be turned on, the capacitor enters a discharging state, and the current IBAT discharged by the capacitor charges the battery through the switching tube Q2 and the switching tube Q4. The equivalent circuit diagram of the fast charge circuit when the capacitor is discharged to charge the battery is shown in fig. 4 b. When the voltage VCFLY of the capacitor CFLY of the quick charge circuit is discharged, the quick charge circuit enters the first stage again, and the process is repeated until the battery BAT is charged.

From the above, it can be seen that: when a power supply of the electronic equipment is electrified and the quick charging circuit charges the battery, the switching tubes Q1, Q2, Q3 and Q4 and the capacitor of the quick charging circuit are in a working state. When the quick charging circuit does not charge the battery, the four switching tubes of the quick charging circuit are in a cut-off state, and the capacitor is placed.

Because the capacitor belongs to the energy storage element, the capacitor can store energy and also can discharge to provide electric energy. Therefore, when the battery is in a low-power state or a low-temperature state, the capacitor can assist or replace the battery to supply current to components of the electronic equipment, and the problem that the electronic equipment is shut down due to the fact that the battery cannot supply large current is solved.

Based on this, the embodiment of the present application provides a charging management module (may also be referred to as a charging management circuit) applicable to an electronic device, as shown in fig. 5a, including: the boost circuit comprises a quick charging circuit, a controller and a boost module.

The quick charging circuit includes: the capacitor comprises a plurality of capacitors connected in parallel and four switching tubes of Q1, Q2, Q3 and Q4 connected in series. Among four switch tubes of series connection, the power of electronic equipment is connected to switch tube Q1's input, and switch tube Q1 and switch tube Q2's link is connected with the one end of each electric capacity that connects in parallel, and the battery is connected to switch tube Q2 and switch tube Q3's link, and switch tube Q3 and switch tube Q4's link is connected with the other end of each electric capacity that connects in parallel, and switch tube Q4's output ground connection.

The controller is connected with the power management module and the temperature sensor, and receives a detection signal obtained by detecting the temperature of the electronic equipment by the temperature sensor and a battery monitoring signal of the power management module. The controller is also connected with the control end of the switch tube Q4 and is connected with the control end of the switch tube Q2 through the boosting module. The controller is used for generating a control signal and controlling the switch tube Q2 and the switch tube Q4 to be switched on or switched off by using the control signal.

Fig. 5a shows that the switching transistors Q1, Q2, Q3, and Q4 are N-channel MOS transistors with parasitic diodes, the input terminal refers to the D pole of the N-channel MOS transistor, the output terminal refers to the S pole of the N-channel MOS transistor, and the control terminal refers to the G pole of the N-channel MOS transistor. Of course, the switching transistors Q1, Q2, Q3, and Q4 are not limited to N-channel MOS transistors, and transistors, switches, and the like having the same functions as those of the N-channel MOS transistors may be used.

In this embodiment, the output terminal of the switch Q2 is connected to the battery, and the conduction condition of the switch Q2 is that the voltage at the control terminal is greater than the voltage at the output terminal (generally referred to as U) _G Greater than U _S ). Thus, it can be seen that: when the switching tube Q2 needs to be turned on, a voltage higher than the battery voltage needs to be input to the control terminal of the switching tube Q2. Based on this, the controller passes through the control end of boost module access switch tube Q2.

The boost module generally includes an energy storage element and a voltage boost element which are connected with each other, the energy storage element stores energy after receiving an electrical signal, and the voltage boost element boosts an output voltage of the energy storage element and outputs the boosted voltage.

In one embodiment, the boost module is shown in FIG. 5b, and the storage element comprises: the capacitor C1 is connected with the inductor L, and one end of the capacitor C1, which is not connected with the inductor L, is grounded. The common end of the capacitor C1 and the inductor L is connected with the battery, receives the current of the battery and stores energy.

The boost circuit is connected with one end of the inductor which is not connected with the capacitor and the controller respectively, the output end of the boost circuit is connected with one end of the capacitor C2, and the other end of the capacitor C2 is grounded. And the output end of the booster circuit and the common end of the capacitor C2 are used as the output end A of the booster module. And the output end A of the boosting module is used for being connected with the control end of the switching tube Q2. Under the control of the controller, the booster circuit boosts the output voltage of the energy storage element and outputs the boosted output voltage.

In some embodiments, the boost circuit may employ a boost chip.

Of course, when the controller can directly output a voltage higher than the battery voltage to the control terminal of the switching tube Q2, the controller can be directly connected to the control terminal of the switching tube Q2.

In one possible embodiment, when the quick charge circuit does not charge the battery of the electronic device, the controller may generate a control signal to control the switching tube Q2 and the switching tube Q4 to be turned on or off according to a detection signal of the temperature sensor. When the quick charging circuit charges the battery, the controller generates a control signal again to control the switch tube Q2 and the switch tube Q4 to be cut off.

Specifically, the temperature sensor detects the temperature of the electronic device to obtain a detection signal. The controller is communicated with the temperature sensor and receives the detection signal reported by the temperature sensor, and when the controller judges that the temperature of the electronic equipment is lower than the threshold value by using the detection signal reported by the temperature sensor, the controller determines that the battery is in a low-temperature state. The battery is in a low-temperature state, the controller generates two paths of control signals, one path of control signal directly controls the switch tube Q4 to be conducted, and the other path of control signal controls the switch tube Q2 to be conducted after the control signal is boosted through the boosting module. Wherein, the threshold value can be set according to the requirement.

The battery of the electronic device is not charged by the fast charging circuit, as shown in fig. 6a, the switching tube Q1 and the switching tube Q3 of the fast charging circuit are in an off state, the switching tube Q2 and the switching tube Q4 are controlled to be turned on, an equivalent circuit diagram of the fast charging circuit connected with the battery is shown in fig. 6b, and a plurality of capacitors in the fast charging circuit are equivalent to the capacitors shown in fig. 6 b. The battery instantaneously charges the capacitor of the quick charging circuit along the direction indicated by the arrow (1) until the potential difference between the two ends of the capacitor is equal to the voltage of the battery.

When the battery is in a low-temperature state, the activity of the battery is reduced, and after the battery instantly charges the capacitor until the potential difference between two ends of the capacitor is equal to the voltage of the battery, the capacitor discharges to assist the battery or replace the battery to supply current to other parts (parts needing to be charged) of the electronic equipment. Particularly, when the electronic equipment generates an event requiring large current output, such as call connection or call dialing, the current discharged by the capacitor is along the direction indicated by an arrow (2), and the capacitor can replace a battery to supply electric energy to the outside.

When the quick charging circuit charges the battery, the controller generates a low level signal, the low level signal acts on the control end of the switch tube Q4, and the switch tube Q4 is in a cut-off state because the low level signal does not meet the turn-on condition. The low level signal acts on the switching tube Q2 after passing through the boost module, but still does not satisfy the conduction condition of the switching tube Q2, so that the switching tube Q2 is in a cut-off state. It can be understood that, when the fast charging circuit charges the battery, the controller generates a low level signal to control the switching tube Q2 and the switching tube Q4 to be turned off, so as to control the switching tube Q2 and the switching tube Q4 to return to the initial state. Therefore, when the battery of the electronic device is charged by the quick charging circuit, the switching tubes Q1 and Q3, and the switching tubes Q2 and Q4 can be switched on alternately according to the above content.

When the quick charge circuit charges the battery of the electronic equipment, the quick charge circuit charges the battery by adopting power supply voltage according to two stages, namely a first stage: the power supply voltage charges a capacitor of the quick charging circuit; and a second stage: and the capacitor of the quick charging circuit discharges to charge the battery.

The specific process of the quick charging circuit for charging the battery according to the two stages can refer to the foregoing contents, and details are not described here.

In some embodiments, the detection of whether the battery of the electronic device is in the charging state is performed by:

the charger is inserted into the charging interface of the electronic equipment, and the power pin of the charging interface of the electronic equipment can generate high level. Based on this, the controller may detect the level value of the power supply pin to determine whether the battery of the electronic device is in a charged state.

In some embodiments, the charging interface of the electronic device may employ the USB interface 130 shown in fig. 1, and the power pin refers to the VBUS pin of the USB interface.

In another possible embodiment, when the fast charging circuit does not charge the battery of the electronic device, the controller may generate a control signal to control the switching tube Q2 and the switching tube Q4 to be turned on or off according to the battery monitoring signal of the power management module. When the quick charging circuit charges the battery, the controller generates a control signal again to control the switch tube Q2 and the switch tube Q4 to be cut off.

As mentioned above, the power management module of the electronic device is used to monitor parameters such as battery capacity, battery cycle number, battery state of health (leakage, impedance), etc. The controller may communicate with the power management module to obtain the battery capacity monitored by the power management module. The controller utilizes the acquired battery capacity to generate two paths of control signals when the battery is determined to be in a low-power state, one path of control signal directly controls the switch tube Q4 to be conducted, and the other path of control signal controls the switch tube Q2 to be conducted after being boosted by the boosting module.

In some embodiments, the controller determines that the acquired battery capacity is less than or equal to a preset capacity value, and then determines that the battery is in a low-battery state. In this embodiment, the predetermined capacity value may be set according to the total capacity of the battery, for example, 20% of the total capacity of the battery is set as the predetermined capacity value. In other embodiments, the battery of the electronic device is a single cell battery, and the controller determines that the voltage of the single cell battery is less than 3.5V by using the acquired battery capacity, and the battery is determined to be in a low state of charge.

The fast charging circuit does not charge the battery of the electronic device, as shown in fig. 6a, the switching tube Q1 and the switching tube Q3 of the fast charging circuit are in an off state, the switching tube Q2 and the switching tube Q4 are controlled to be on, an equivalent circuit diagram of the fast charging circuit connected with the battery is shown in fig. 6b, and a plurality of capacitors in the fast charging circuit are equivalent to the capacitors shown in fig. 6 b. The battery instantaneously charges the capacitor of the quick charging circuit along the direction indicated by the arrow (1) until the potential difference between the two ends of the capacitor is equal to the voltage of the battery.

When the battery is in a low-power state, the activity of the battery is also reduced, and after the battery instantly charges the capacitor until the potential difference between two ends of the capacitor is equal to the voltage of the battery, the capacitor discharges to assist the battery or replace the battery to supply current to other parts (parts needing to be charged) of the electronic equipment. Particularly, when the electronic equipment generates an event requiring large current output, such as call connection or call dialing, the current discharged by the capacitor is along the direction indicated by an arrow (2), and can replace the battery to supply electric energy to the outside.

When the quick charging circuit charges the battery, the controller generates a low level signal, the low level signal acts on the control end of the switch tube Q4, and the switch tube Q4 is in a cut-off state because the low level signal does not meet the turn-on condition. The low level signal acts on the switching tube Q2 after passing through the voltage boosting module, but the switching tube Q2 is still in a cut-off state because the on condition of the switching tube Q2 is still not satisfied. It can be understood that when the battery is in a charging state, the controller generates a low level signal to control the switching tube Q2 and the switching tube Q4 to be turned off, so as to control the switching tube Q2 and the switching tube Q4 to return to the initial state. Thus, when the battery of the electronic device is charged, the switching tubes Q1 and Q3, and the switching tubes Q2 and Q4 can be alternately switched on according to the above contents.

In this embodiment, the manner in which the fast charging circuit charges the battery of the electronic device and the manner in which whether the battery of the electronic device is in the charging state are detected can be referred to in the foregoing possible embodiments, and details are not described here.

It should be noted that, in this embodiment, the fast charging circuit does not charge the battery of the electronic device, and the battery is in a low temperature state or a low power state, the switching tube Q2 and the switching tube Q4 are controlled to be turned on, the capacitor is communicated with the battery, after the capacitor is charged by the battery instantaneously, the capacitor discharges to assist the battery or replace the battery to provide current for the components of the electronic device, so as to avoid the situation that the electronic device needs a large current, and the shutdown of the electronic device is caused because the battery cannot provide a large current due to the low temperature or the low power of the battery.

And the battery is in a low-temperature state or a low-power state, the switch tube Q2 is connected with the switch tube Q4, the capacitor is communicated with the battery, and after the battery charges the capacitor, the current discharged by the capacitor can provide electric energy for the electronic equipment, so that the standby time is prolonged. The following results are obtained through actual measurement: and at about minus 30 ℃, the standby time of the electronic equipment is prolonged by at least more than 30 minutes.

It should be further noted that, in this embodiment, the switching tube Q2 and the switching tube Q4 in the fast charging circuit are controlled to be turned on, so as to communicate the capacitor and the battery in the fast charging circuit, and the capacitor in the fast charging circuit assists the battery or replaces the battery to supply current to the component of the electronic device, so that on the premise that no additional component is introduced to the electronic device, the electronic device is prevented from requiring a large current, shutdown of the electronic device is avoided due to the fact that the battery cannot supply a large current at a low temperature or a low power level, and the standby time of the electronic device is prolonged.

Example two

Another embodiment of the present application further provides another charging management module applicable to an electronic device, and a structure of the electronic device can also be seen in fig. 1. In this embodiment, as shown in fig. 7, the charging management module includes: the boost circuit comprises a quick charge circuit and a boost module.

The quick charging circuit includes: the capacitor comprises a plurality of capacitors connected in parallel and four switching tubes of Q1, Q2, Q3 and Q4 connected in series. Among four switch tubes connected in series, the input end of the switch tube Q1 is connected with the power supply of the electronic equipment, the connecting end of the switch tube Q1 and the switch tube Q2 is connected with one end of each capacitor connected in parallel, the connecting end of the switch tube Q2 and the switch tube Q3 is connected with the battery, the connecting end of the switch tube Q3 and the switch tube Q4 is connected with the other end of each capacitor connected in parallel, and the output end of the switch tube Q4 is grounded.

The boosting module is connected with the control end of the switching tube Q2 and is also used for being connected with a processor of the electronic equipment.

The processor of the electronic equipment is connected with the power management module and the temperature sensor, and receives a detection signal obtained by detecting the temperature of the electronic equipment by the temperature sensor and a battery monitoring signal of the power management module. The processor is also used for connecting the control end of the switch tube Q4 and the boosting module, generates a control signal and controls the switch tube Q2 and the switch tube Q4 to be switched on or switched off by utilizing the control signal.

Fig. 7 shows that the switching transistors Q1, Q2, Q3, and Q4 are N-channel MOS transistors with parasitic diodes, the input terminal refers to the D pole of the N-channel MOS transistor, the output terminal refers to the S pole of the N-channel MOS transistor, and the control terminal refers to the G pole of the N-channel MOS transistor. Of course, the switching transistors Q1, Q2, Q3, and Q4 are not limited to N-channel MOS transistors, and transistors, switching transistors, switches, and the like having the same functions as those of the N-channel MOS transistors may be used.

In this embodiment, the output terminal of the switch Q2 is connected to the battery, and the conduction condition of the switch Q2 is that the voltage at the control terminal is greater than the voltage at the output terminal (generally referred to as U) _G Greater than U _S ). Thus, it can be seen that: when the switching tube Q2 needs to be turned on, a voltage higher than the battery voltage needs to be input to the control terminal of the switching tube Q2. Based on this, in some embodiments, the processor may access the control terminal of the switching tube Q2 through the boost module. Of course, in other embodiments, if the processor can directly output a higher voltage, the processor can be directly connected to the control terminal of the switch Q2.

The structure and operation process of the boost module can be as shown in fig. 5b and described in the foregoing embodiments, and are not described herein again.

In one possible embodiment, when the quick charging circuit does not charge the battery of the electronic device, the processor may generate a control signal to control the switching tube Q2 and the switching tube Q4 to be turned on or off according to a detection signal of the temperature sensor. When the quick charging circuit charges the battery, the processor generates a control signal again to control the switching tube Q2 and the switching tube Q4 to be cut off.

Specifically, the temperature sensor detects the temperature of the electronic device to obtain a detection signal. The processor is communicated with the temperature sensor, receives the detection signal reported by the temperature sensor, and determines that the battery is in a low-temperature state when the processor judges that the temperature of the electronic equipment is lower than a threshold value by using the detection signal reported by the temperature sensor. The battery is in a low-temperature state, the processor generates two paths of control signals, one path of control signal directly controls the switch tube Q4 to be conducted, and the other path of control signal controls the switch tube Q2 to be conducted after the voltage is boosted through the voltage boosting module. Wherein, the threshold value can be set according to the requirement.

As shown in fig. 8a, a switching tube Q1 and a switching tube Q3 of the quick charging circuit are in an off state, a switching tube Q2 and a switching tube Q4 are controlled to be turned on, an equivalent circuit diagram of the quick charging circuit connected with the battery is shown in fig. 8b, and a plurality of capacitors in the quick charging circuit are equivalent to capacitors shown in fig. 8 b. The battery instantaneously charges the capacitor of the quick charging circuit along the direction indicated by the arrow (1) until the potential difference between the two ends of the capacitor is equal to the voltage of the battery.

When the quick charging circuit charges the battery, the processor generates a low level signal, the low level signal acts on the control end of the switch tube Q4, and the switch tube Q4 is in a cut-off state because the low level signal does not meet the turn-on condition. The low level signal acts on the switching tube Q2 after passing through the boost module, but still does not satisfy the conduction condition of the switching tube Q2, so that the switching tube Q2 is in a cut-off state. It can be understood that, the quick charging circuit charges the battery, and the processor generates a low level signal to control the switching tube Q2 and the switching tube Q4 to be turned off, so as to control the switching tube Q2 and the switching tube Q4 to return to the initial state. So, when the quick charge circuit charges the battery, switch tube Q1 and switch tube Q3, switch tube Q2 and switch tube Q4 just can be switched on in turn according to the aforesaid content.

In some embodiments, the detection manner of whether the battery of the electronic device is in the charging state is:

the charger is inserted into a charging interface of the electronic equipment, a power pin of the charging interface of the electronic equipment generates high level, and the controller can detect the level value of the power pin to determine whether a battery of the electronic equipment is in a charging state.

In another possible embodiment, when the fast charging circuit does not charge the battery of the electronic device, the processor may generate a control signal to control the switching tube Q2 and the switching tube Q4 to be turned on or off according to the battery monitoring signal of the power management module. When the quick charging circuit charges the battery, the processor generates a control signal again to control the switching tube Q2 and the switching tube Q4 to be cut off.

As mentioned above, the power management module of the electronic device is used to monitor parameters such as battery capacity, battery cycle number, battery state of health (leakage, impedance), etc. The processor may communicate with the power management module to obtain the battery capacity monitored by the power management module. The processor determines that the battery is in a low-power state by using the acquired battery capacity, and generates two paths of control signals, wherein one path of control signal directly controls the switch tube Q4 to be conducted, and the other path of control signal controls the switch tube Q2 to be conducted after the control signal is boosted by the boosting module.

In some embodiments, the battery of the electronic device is a single cell battery, and the processor determines that the voltage of the single cell battery is less than 3.5V using the acquired battery capacity, and determines that the battery is in a low state of charge.

The quick charge circuit does not charge the battery of the electronic device, as shown in fig. 8a, the switching tube Q1 and the switching tube Q3 of the quick charge circuit are in an off state, the switching tube Q2 and the switching tube Q4 are controlled to be on, an equivalent circuit diagram of the quick charge circuit connected with the battery is shown in fig. 8b, and a plurality of capacitors in the quick charge circuit are equivalent to the capacitors shown in fig. 8 b. The battery instantaneously charges the capacitor of the quick charging circuit along the direction indicated by the arrow (1) until the potential difference between the two ends of the capacitor is equal to the voltage of the battery.

When the quick charging circuit charges the battery of the electronic equipment, the processor generates a low level signal, the low level signal acts on the control end of the switch tube Q4, and the switch tube Q4 is in a cut-off state because the low level signal does not meet the conduction condition. The low level signal acts on the switching tube Q2 after passing through the boost module, but the switching tube Q2 is still in a cut-off state because the on condition of the switching tube Q2 is still not satisfied. It can be understood that, the quick charging circuit charges the battery, and the processor generates a low level signal to control the switching tube Q2 and the switching tube Q4 to be turned off, so as to control the switching tube Q2 and the switching tube Q4 to return to the initial state. Therefore, when the battery of the electronic device is charged by the quick charging circuit, the switching tubes Q1 and Q3, and the switching tubes Q2 and Q4 can be switched on alternately according to the above content.

In this possible embodiment, the manner in which the fast charging circuit charges the battery of the electronic device and the manner in which whether the battery of the electronic device is in the charging state are both referred to in the foregoing possible embodiments, and details are not described here.

It should be noted that, in this embodiment, the battery of the electronic device is not charged by the fast charging circuit, and the battery is in a low-temperature or low-power state, the switching tube Q2 and the switching tube Q4 are controlled to be turned on, and the capacitor is communicated with the battery, so that a large current demand on the electronic device can be avoided, shutdown of the electronic device due to the fact that the battery cannot provide a large current at a low temperature or at a low power, and the standby time can be further prolonged.

EXAMPLE III

The electronic equipment can be provided with a charging circuit and a quick charging circuit, when a charging interface of the electronic equipment is connected with a quick charging charger, the quick charging circuit of the electronic equipment operates, and the battery is charged by adopting the mode provided by the content; when the charging interface of the electronic equipment is connected with a common charger, the charging circuit of the electronic equipment operates to charge the battery.

In some embodiments, the charging interface of the electronic device is plugged into the charger, the power pin of the charging interface of the electronic device generates a high level, and the electronic device can detect the level value of the power pin to determine whether the battery of the electronic device is in a charging state. It should be further noted that, a charger is inserted into a charging interface of the electronic device, and the electronic device, usually a processor, may perform information interaction with the charger based on the BC1.2 protocol, so as to determine whether the charger inserted into the charging interface is a fast charger or a normal charger.

Based on this, the present embodiment provides a charging management module, see fig. 9 (a), including: charging circuit, fill circuit, controller and boost module soon.

The charging circuit is connected with the battery and a power supply of the electronic equipment and is used for receiving the voltage VBUS of the power supply and charging the battery.

The specific structure and working process of the boost module can refer to the content of the foregoing embodiment, and are not described herein again.

The controller controls the switching tube Q2 and the switching tube Q4 to be switched on or off by using the control signal, and the following implementation modes can be adopted:

in the first embodiment, when the quick charging circuit does not charge the battery of the electronic device and the charging circuit does not charge the battery of the electronic device, the controller determines that the electronic device is in a low-temperature state according to a detection signal of the temperature sensor, and generates a control signal to control the switching tube Q2 and the switching tube Q4 to be conducted. When the quick charging circuit is in a charging state of the battery, the controller generates a control signal to control the switching tube Q2 and the switching tube Q4 to be cut off.

In the second embodiment, when the quick charging circuit does not charge the battery of the electronic device, and the charging circuit does not charge the battery of the electronic device, the controller determines that the battery of the electronic device is in a low power state according to the battery monitoring signal of the power management module, and generates the control signal to control the switching tube Q2 and the switching tube Q4 to be switched on. When the quick charging circuit is in a battery charging state, the controller generates a control signal to control the switch tube Q2 and the switch tube Q4 to be cut off.

For specific implementation processes of the foregoing two embodiments, reference may be made to the content of the foregoing first embodiment, and details are not described here.

In this embodiment, the fast charging circuit does not charge the battery of the electronic device, and when the charging circuit does not charge the battery of the electronic device, if the battery is in a low-temperature or low-power state, the switch tube Q2 and the switch tube Q4 are controlled to be turned on, and the capacitor is communicated with the battery, so that the problem that the electronic device needs a large current due to the fact that the battery cannot provide a large current at a low temperature or a low power level to shut down the electronic device can be avoided, and the standby time can be further prolonged.

When the fast charging circuit does not charge the battery of the electronic device, but the charging circuit charges the battery of the electronic device, the controller may generate a control signal according to a detection signal of the temperature sensor or a battery monitoring signal of the power management module to control the switching tube Q2 and the switching tube Q4 to be turned on. When the quick charging circuit is in a battery charging state, the controller generates a control signal to control the switch tube Q2 and the switch tube Q4 to be cut off.

The present embodiment provides another charging management module, referring to fig. 9 (b), including: charging circuit, quick charge circuit and boost module.

Fill the circuit soon and include: the circuit comprises a plurality of capacitors connected in parallel and four switching tubes Q1, Q2, Q3 and Q4 connected in series. Among four switch tubes connected in series, the input end of the switch tube Q1 is connected with the power supply of the electronic equipment, the connecting end of the switch tube Q1 and the switch tube Q2 is connected with one end of each capacitor connected in parallel, the connecting end of the switch tube Q2 and the switch tube Q3 is connected with the battery, the connecting end of the switch tube Q3 and the switch tube Q4 is connected with the other end of each capacitor connected in parallel, and the output end of the switch tube Q4 is grounded.

The processor controls the switch tube Q2 and the switch tube Q4 to be switched on or off by using the control signal, and the following implementation modes can be adopted:

in the first embodiment, when the fast charging circuit does not charge the battery of the electronic device, and the charging circuit does not charge the battery of the electronic device, the processor determines that the electronic device is in a low-temperature state according to the detection signal of the temperature sensor, and generates the control signal to control the switching tube Q2 and the switching tube Q4 to be conducted. When the quick charging circuit is in a charging state on the battery, the processor generates a control signal to control the switching tube Q2 and the switching tube Q4 to be cut off.

In the second embodiment, when the quick charging circuit does not charge the battery of the electronic device, and the charging circuit does not charge the battery of the electronic device, the processor determines that the battery of the electronic device is in a low power state according to the battery monitoring signal of the power management module, and generates the control signal to control the switching tube Q2 and the switching tube Q4 to be switched on. When the quick charging circuit is in a charging state on the battery, the processor generates a control signal to control the switching tube Q2 and the switching tube Q4 to be cut off.

For specific implementation processes of the foregoing two embodiments, reference may be made to the contents of the foregoing second embodiment, and details are not described herein again.

When the fast charging circuit does not charge the battery of the electronic device, but the charging circuit charges the battery of the electronic device, the processor may generate a control signal according to a detection signal of the temperature sensor or a battery monitoring signal of the power management module to control the switching tube Q2 and the switching tube Q4 to be turned on. When the quick charging circuit is in a battery charging state, the processor generates a control signal to control the switch tube Q2 and the switch tube Q4 to be cut off.

In the charging management module provided in the foregoing three embodiments, the plurality of parallel capacitors and the plurality of switching tubes of the quick charging circuit can be provided to solve the problem that the electronic device is shut down due to the fact that the battery is low in temperature or low in power and cannot provide a large current. It is known that: the plurality of parallel capacitors and the plurality of switching tubes for solving the foregoing problems may be provided without being limited to the fast charging circuit.

In some embodiments, the charging management module may include a plurality of capacitors connected in parallel and a plurality of switching tubes, and the plurality of capacitors connected in parallel are connected to the power supply and the battery of the electronic device through the switching tubes. And, the plurality of switching tubes in the charging management module can be divided into two groups according to functions, the first group of switching tubes is used for connecting the power supply and the capacitor of the electronic device, such as the switching tube Q1 and the switching tube Q3 in the foregoing embodiment, and the second group of switching tubes is used for connecting the capacitor and the battery of the electronic device, such as the switching tube Q2 and the switching tube Q4 in the foregoing embodiment.

The number and connection form of the plurality of switching tubes and the plurality of parallel capacitors may be as shown in fig. 2, but the present invention is not limited to that shown in fig. 2, and it is only necessary to ensure that the plurality of switching tubes are divided into two groups of switching tubes having the aforementioned functions.

When the power supply of the electronic equipment charges the battery, in the first stage, the first group of switching tubes are switched on, the second group of switching tubes are switched off, the power supply of the electronic equipment is communicated with the capacitor, and the power supply of the electronic equipment charges the capacitor. And in the second stage, the first group of switching tubes is cut off, the second group of switching tubes is conducted, the capacitor is communicated with a battery of the electronic equipment, and the capacitor discharges to charge the battery. For a specific process, reference may be made to the above description of the first embodiment.

When the battery of the electronic equipment is not charged, and the battery is in a low-temperature state or a low-power state, the first group of switching tubes is cut off, the second group of switching tubes is controlled to be switched on, the capacitor and the battery are communicated, the capacitor assists or replaces the battery to provide current for the components of the electronic equipment, the problem that the battery cannot provide large current to cause shutdown of the electronic equipment when the battery is in the low-power state or the low-temperature state is solved, and the standby time length prolonging advantage is further achieved.

Example four

Based on the charging management module provided in the foregoing embodiment, another embodiment of the present application further provides a battery power supply control method, where the control method is applied to an electronic device, a structure of the electronic device is shown in fig. 1, and a structure of the charging management module included in the electronic device may be shown in fig. 5a, fig. 7, fig. 9a, or fig. 9 b.

As shown in fig. 10, the method for controlling power supplied by a battery according to this embodiment includes the following steps:

s1001, detecting whether a battery of the electronic equipment is in a charging state.

As described above, the electronic device may determine whether a battery of the electronic device is in a charged state by detecting a level value of a power pin of a charging interface of the electronic device.

If the battery of the electronic device is detected to be in the charging state, step S1002 is executed to charge the battery by using the fast charging circuit or the charging circuit according to the type of the charger.

The electronic equipment is provided with a quick charging circuit and a charging circuit, and the quick charging circuit and the charging circuit are respectively matched with a charger to charge a battery. A charger is inserted into a charging interface of electronic equipment, and the electronic equipment, usually a processor, can perform information interaction with the charger based on a BC1.2 protocol, so as to determine whether the charger inserted into the charging interface is a quick-charging charger or a common charger.

The charger inserted into the charging interface is a quick charging charger, and the battery is charged by using a quick charging circuit. The charger inserted into the charging interface is a common charger, and the battery is charged by using the charging circuit. The contents of charging the battery by the charging circuit can be referred to as described above.

In some embodiments, the electronic device is only provided with the fast charging circuit, and when it is detected that the battery of the electronic device is in a charging state, the battery is charged by using the fast charging circuit.

If it is detected that the battery of the electronic device is not in the charging state, step S1003 is executed to detect whether the battery of the electronic device is in a low temperature state or a low power state.

In some embodiments, the processor of the electronic device or the controller of the charging management module communicates with the temperature sensor and receives the detection signal reported by the temperature sensor. And when the processor of the electronic equipment or the controller of the charging management module judges that the temperature of the electronic equipment is lower than the threshold value by using the detection signal reported by the temperature sensor, the controller determines that the battery is in a low-temperature state.

In other embodiments, the processor of the electronic device or the controller of the charging management module obtains the battery capacity monitored by the power management module, and determines that the battery is in a low power state if the obtained battery capacity is smaller than or equal to a preset capacity value. Or, the processor of the electronic device or the controller of the charging management module determines that the voltage of the single-cell battery is less than 3.5V by using the acquired battery capacity, and the battery is determined to be in a low-battery state. In this embodiment, the predetermined capacity value may be set according to the total capacity of the battery, for example, 20% of the total capacity of the battery is set as the predetermined capacity value.

If the battery of the electronic device is detected to be in a low temperature or low battery state, step S1004 is executed to control the switching tube Q2 and the switching tube Q4 to be turned on.

In this embodiment, the battery of the electronic device is not charged, the switching tube Q1 and the switching tube Q3 of the fast charging circuit are in a cut-off state, the switching tube Q2 and the switching tube Q4 are controlled to be turned on, the battery is communicated with the capacitor of the fast charging circuit, and the battery instantaneously charges the capacitor of the fast charging circuit until the potential difference between the two ends of the capacitor is equal to the voltage of the battery.

When the battery is in a low-temperature state, the activity of the battery is reduced, and after the battery instantly charges the capacitor until the potential difference between two ends of the capacitor is equal to the voltage of the battery, the capacitor discharges to assist the battery or replace the battery to supply current to other parts (parts needing to be charged) of the electronic equipment. Especially when the electronic equipment generates an event requiring large current output, such as call connection or call dialing, the current discharged by the capacitor can replace the battery to supply electric energy to the outside.

When the battery is in a low-power state, the activity of the battery is also reduced, and after the battery instantly charges the capacitor until the potential difference between two ends of the capacitor is equal to the voltage of the battery, the capacitor discharges to assist the battery or replace the battery to supply current to other parts (parts needing to be charged) of the electronic equipment. Especially when the electronic equipment generates an event requiring large current output, such as call connection or call dialing, the current discharged by the capacitor can replace the battery to supply electric energy to the outside.

If the battery of the electronic equipment is not detected to be in the low-temperature or low-power state, the electronic equipment returns to the initial state, and whether the battery of the electronic equipment is in the charging state can be continuously detected.

And in the process of conducting the second switching tube and the fourth switching tube, executing step S1005, and detecting whether the battery of the electronic device is in a charging state.

The manner of detecting whether the battery of the electronic device is in a charged state may be as described above.

If it is detected that the battery of the electronic device is not in the charging state, the process returns to step S1003.

If the battery of the electronic device is detected to be in the charging state, step S1006 is executed to control the switching tube Q2 and the switching tube Q4 to be turned off.

In this embodiment, when the battery is in the charging state, the processor of the electronic device or the controller of the charging management module generates a low level signal, the low level signal acts on the control end of the switching tube Q4, and the switching tube Q4 is in the off state because the low level signal does not satisfy the on condition. The low level signal acts on the switching tube Q2 after passing through the boost module, but still does not satisfy the conduction condition of the switching tube Q2, so that the switching tube Q2 is in a cut-off state. It can be understood that when the battery is in a charging state, the controller generates a low level signal to control the switching tube Q2 and the switching tube Q4 to be turned off, so as to control the switching tube Q2 and the switching tube Q4 to return to the initial state. Therefore, when the battery of the electronic device is charged, the switching tubes Q1 and Q3, and the switching tubes Q2 and Q4 can be alternately switched on according to the above contents.

It should be noted that, in this embodiment, the battery of the electronic device is not charged, and the battery is in a low-temperature or low-power state, the switching tube Q2 and the switching tube Q4 are controlled to be turned on, the capacitor is communicated with the battery, and after the capacitor is instantly charged by the battery, the capacitor discharges to assist the battery or replace the battery to supply current to other components of the electronic device, so as to avoid the problem that the electronic device is shut down due to the fact that the battery cannot supply a large current at a low temperature or a low power. And the battery is in a low-temperature state or a low-power state, the switch tube Q2 is connected with the switch tube Q4, the capacitor is communicated with the battery, and after the battery charges the capacitor, the current discharged by the capacitor can provide electric energy for the electronic equipment, so that the standby time is prolonged.

Claims

1. A charging management circuit applied to an electronic device including a battery, the charging management circuit comprising: the plurality of parallel capacitors are connected with the battery and the power supply through the switch tubes;

the plurality of switching tubes comprise a first group of switching tubes and a second group of switching tubes, the first group of switching tubes are used for communicating the power supply and the plurality of capacitors connected in parallel, and the second group of switching tubes are used for communicating the plurality of capacitors connected in parallel and the battery; when the battery is charged by the power supply, the first group of switching tubes and the second group of switching tubes are controlled to be conducted in a time-sharing mode, when the first group of switching tubes are conducted, the capacitor is charged by the power supply, and when the second group of switching tubes are conducted, the capacitor discharges electricity to charge the battery; when the battery is not charged by the power supply and is in a low-temperature state or a low-power state, the first group of switching tubes are cut off, and the second group of switching tubes are conducted to communicate the battery and the plurality of capacitors connected in parallel.

2. The charging management circuit of claim 1, wherein the plurality of switching tubes and the plurality of capacitors connected in parallel form a fast charging circuit, and the fast charging circuit is configured to fast charge the battery.

3. The charge management circuit of claim 1 or 2, wherein the plurality of switching tubes comprise: the first switching tube, the second switching tube, the third switching tube and the fourth switching tube are connected in series;

the input end of the first switch tube is connected with the power supply, and the connecting end of the first switch tube and the second switch tube is connected with one end of each capacitor; the connection end of the third switching tube and the fourth switching tube is connected with the other end of each capacitor, and the output end of the fourth switching tube is grounded;

and the connecting end of the second switching tube and the third switching tube is connected with the battery.

4. The charge management circuit of claim 1, further comprising:

and the controller is used for determining that the battery is not charged by the power supply and controlling at least part of the switch tubes to be conducted so that the battery is communicated with the plurality of parallel capacitors when the battery is in a low-temperature state or a low-power state.

5. The charge management circuit of claim 3, further comprising:

and the controller is used for determining that the battery is not charged by the power supply and controlling the second switch tube and the fourth switch tube to be conducted when the battery is in a low-temperature state or a low-electric-quantity state so as to communicate the battery and the plurality of capacitors connected in parallel.

6. The charge management circuit of claim 4 or 5, wherein the controller is configured to:

and if the power pin of the charging interface of the electronic equipment is detected to generate a low level signal, determining that the battery is not charged by the power supply.

7. The charge management circuit of claim 4 or 5, wherein the controller is configured to:

acquiring a detection signal of a temperature sensor;

and judging that the temperature of the electronic equipment is lower than a threshold value by using a detection signal of the temperature sensor, and determining that the battery is in a low-temperature state.

8. The charge management circuit of claim 4 or 5, wherein the controller is configured to:

acquiring the battery capacity monitored by a power management module;

and judging that the battery capacity is smaller than a preset capacity value, or judging that the voltage of the battery is smaller than a preset value by using the battery capacity, and determining that the battery is in a low-power state.

9. The charge management circuit of claim 1 or 2, wherein the plurality of switching tubes are configured to be connected to a processor of the electronic device, the processor configured to: and when the battery is determined not to be charged by the power supply and is in a low-temperature state or a low-power state, controlling at least part of the switch tubes to be conducted so that the battery is communicated with the capacitors connected in parallel.

10. The charge management circuit of claim 3, wherein the second switching tube and the fourth switching tube are configured to be connected to a processor of the electronic device, and wherein the processor is configured to: and when the battery is determined not to be charged by the power supply and is in a low-temperature state or a low-electric-quantity state, controlling the second switch tube and the fourth switch tube to be conducted so as to communicate the battery and the plurality of capacitors connected in parallel.

11. The charge management circuit of claim 3, further comprising: and the boosting module is connected with the control end of the second switch tube and used for boosting the received control signal to the conduction voltage of the second switch tube.

12. The charge management circuit of claim 10, further comprising: and the boosting module is connected with the control end of the second switch tube and used for boosting the received control signal to the conduction voltage of the second switch tube.

13. The charge management circuit of claim 11, wherein the boost module comprises: an energy storage element and a voltage boosting element connected to each other, wherein:

the energy storage element stores energy after receiving the electric signal;

the voltage boosting element boosts the output voltage of the energy storage element to the conducting voltage of the second switching tube.

14. The charge management circuit of claim 13, wherein the energy storage element comprises: the capacitor and the inductor are connected, and the common end of the capacitor and the inductor receives an electric signal; one end of the capacitor, which is not connected with the inductor, is grounded; one end of the inductor, which is not connected with the capacitor, is connected with the voltage boosting element.

15. An electronic device, comprising:

a temperature sensor for detecting a temperature of the electronic device;

the power management module is used for monitoring the battery to obtain the battery capacity;

a battery, and a charge management circuit connected to the battery, the charge management circuit as claimed in any one of claims 1 to 14.