CN117200368A - Battery control circuit, method, terminal device and storage medium - Google Patents

Abstract

This application applies to the field of battery technology and provides a battery control circuit, method, terminal equipment and storage medium. The above circuit includes a charging and discharging module, a voltage regulating module and a control module. The control module monitors the output voltage of the battery. When the output voltage of the battery is less than the preset output voltage, a first discharge signal is sent to the voltage regulating module. The voltage regulating module controls the battery. The output voltage is boosted to obtain a boosted voltage, so that the voltage value of the boosted voltage is greater than the preset output voltage, thereby being greater than the rated operating voltage of the load, and the boosted voltage is stepped down through the charge and discharge module to obtain the first discharge voltage. , making the first discharge voltage close to the rated operating voltage of the load, which can drive the load of the electrical equipment to operate stably, and avoid excessive voltage values from damaging the load, ensuring stable performance of the electrical equipment when the battery's discharge depth decreases. It can improve the overall performance, operational stability and operational safety of electrical equipment.

Description

Battery control circuit, method, terminal equipment and storage medium

Technical field

The present application belongs to the field of battery technology, and in particular relates to a battery control circuit, method, terminal equipment and storage medium.

Background technique

With the continuous improvement and development of lithium-ion battery (Lithium Lon Cells And Batteries) technology, its applications in different fields are becoming more and more widespread. In addition to being applied to electronic devices such as mobile phones, laptops, and cameras, lithium-ion batteries can also be used in to electric equipment such as electric bicycles, electric cars and electric aircraft. Currently, lithium-ion batteries usually use graphite material as the negative electrode. Graphite negative electrodes have the advantages of low cost and high discharge stability. However, the specific capacity (Specific Capacity) of graphite negative electrode lithium-ion batteries is low, which limits the energy density of lithium-ion batteries.

Currently, major battery manufacturers and terminal manufacturers are trying to use new materials as the negative electrode of lithium-ion batteries. For example, silicon materials are used as the negative electrode of lithium-ion batteries. Compared with graphite negative electrode lithium-ion batteries, silicon can reduce the discharge depth of lithium-ion batteries. Negative lithium-ion batteries can release power at a lower output voltage, which can effectively increase the energy density of lithium-ion batteries, thereby achieving greater battery capacity in the same volume. The discharge depth of the lithium-ion battery decreases, resulting in a decrease in the output voltage. When the output voltage of the lithium-ion battery is lower than the rated operating voltage of some components in the electrical equipment, it is easy to cause the performance of the above components to decline, affecting the overall performance of the electrical equipment. performance and work stability. Therefore, how to ensure the stable performance of electrical equipment when the discharge depth of lithium-ion batteries decreases has become an urgent problem that needs to be solved.

Contents of the invention

In view of this, embodiments of the present application provide a battery control circuit, method, terminal equipment and storage medium to solve the problem of poor performance release stability of electrical equipment when the discharge depth of existing lithium-ion batteries decreases.

The first aspect of the embodiment of the present application provides a battery control circuit, which is applied to terminal equipment. The terminal equipment includes a battery and a load, and is characterized in that the circuit includes a charge and discharge module, a voltage regulation module and a control module;

The control module is connected to the charging and discharging module and the voltage regulating module respectively;

The control module is configured to be connected to the battery, and when the output voltage of the battery is less than a preset output voltage, send a first discharge signal to the voltage regulation module;

The voltage regulating module is used to connect to the battery, receive the output voltage of the battery according to the first discharge signal, boost the output voltage, obtain the boosted voltage and send it to the charging and discharging module;

The charging and discharging module is used to connect to the load, and when receiving the boosted voltage, step down the boosted voltage to obtain a first discharge voltage and output it to the load.

The first aspect of the embodiment of the present application provides a battery control circuit that monitors the output voltage of the battery through the control module. When the output voltage of the battery is less than the preset output voltage, a first discharge signal is sent to the voltage regulating module. Through the voltage regulating module The output voltage is boosted to obtain a boosted voltage, so that the voltage value of the boosted voltage is greater than the preset output voltage, thereby being greater than the rated operating voltage of the load, and the boosted voltage is stepped down through the charge and discharge module to obtain the first discharge voltage, so that the first discharge voltage is close to the rated operating voltage of the load, which can drive the load of the electrical equipment to operate stably and avoid damage to the load due to excessive voltage values, thereby ensuring stable performance release of the electrical equipment when the discharge depth of the battery is reduced. , which can improve the overall performance, operational stability and operational safety of electrical equipment.

The second aspect of the embodiment of the present application provides a terminal device, including a battery, a load and the battery control circuit provided by the first aspect of the embodiment of the present application. The battery is connected to a charge and discharge module, a voltage regulating module and a control module respectively. , the load is connected to the battery and the charging and discharging module respectively.

The third aspect of the embodiment of the present application provides a battery control method, which is applied to the control module of the battery control circuit provided in the first aspect of the embodiment of the present application. The method includes:

When the output voltage of the battery is less than the preset output voltage, send the first discharge signal to the voltage regulation module;

The voltage regulating module receives the output voltage of the battery according to the first discharge signal, boosts the output voltage, obtains the boosted voltage and sends it to the charging and discharging module;

The boosted voltage is received by the charging and discharging module, and the boosted voltage is stepped down to obtain a first discharge voltage and output it to the load.

The fourth aspect of the embodiment of the present application provides a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the battery provided by the third aspect of the embodiment of the present application is implemented. The steps of the control method.

It can be understood that the beneficial effects of the above-mentioned second aspect to the fourth aspect can be referred to the relevant description in the above-mentioned first aspect, and will not be described again here.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the purpose of the present application. For some embodiments, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a first structural schematic diagram of a terminal device provided by an embodiment of the present application;

Figure 2 is a second structural schematic diagram of a terminal device provided by an embodiment of the present application;

Figure 3 is a third structural schematic diagram of a terminal device provided by an embodiment of the present application;

Figure 4 is a fourth structural schematic diagram of a terminal device provided by an embodiment of the present application;

Figure 5 is a fifth structural schematic diagram of a terminal device provided by an embodiment of the present application;

Figure 6 is a sixth structural schematic diagram of a terminal device provided by an embodiment of the present application;

Figure 7 is a seventh structural schematic diagram of a terminal device provided by an embodiment of the present application;

Figure 8 is a schematic structural diagram of an eighth type of terminal device provided by an embodiment of the present application;

Figure 9 is a ninth structural schematic diagram of a terminal device provided by an embodiment of the present application;

FIG. 10 is a schematic flowchart of a first battery control method provided by an embodiment of the present application.

Detailed ways

In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures and technologies are provided to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It will be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integers, steps, operations, elements and/or components but does not exclude one or more other The presence or addition of features, integers, steps, operations, elements, components and/or collections thereof.

It will also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

As used in this specification and the appended claims, the term "if" may be interpreted as "when" or "once" or "in response to determining" or "in response to detecting" depending on the context. ". Similarly, the phrase "if determined" or "if [the described condition or event] is detected" may be interpreted, depending on the context, to mean "once determined" or "in response to a determination" or "once the [described condition or event] is detected ]" or "in response to detection of [the described condition or event]".

In addition, in the description of this application and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

Reference in this specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Therefore, the phrases "in one embodiment", "in some embodiments", "in other embodiments", "in other embodiments", etc. appearing in different places in this specification are not necessarily References are made to the same embodiment, but rather to "one or more but not all embodiments" unless specifically stated otherwise. The terms “including,” “includes,” “having,” and variations thereof all mean “including but not limited to,” unless otherwise specifically emphasized.

In applications, major battery manufacturers and terminal manufacturers are currently trying to use new materials as the negative electrode of lithium-ion batteries. For example, silicon materials are used as the negative electrode of lithium-ion batteries. Compared with graphite negative electrode lithium-ion batteries, the energy consumption of lithium-ion batteries can be reduced. Depth of discharge, silicon anode lithium-ion batteries can release power at a lower output voltage, which can effectively increase the energy density of lithium-ion batteries, thereby achieving greater battery capacity in the same volume. The discharge depth of the lithium-ion battery decreases, resulting in a decrease in the output voltage. When the output voltage of the lithium-ion battery is lower than the rated operating voltage of some components in the electrical equipment, it is easy to cause the performance of the above components to decline, affecting the overall performance of the electrical equipment. performance and work stability. Therefore, how to ensure the stable release of the performance of electrical equipment when the discharge depth of lithium-ion batteries decreases has become an urgent problem that needs to be solved.

In view of the above technical problems, embodiments of the present application provide a battery control circuit that monitors the output voltage of the battery through the control module. When the output voltage of the battery is less than the preset output voltage, a first discharge signal is sent to the voltage regulation module, and the voltage regulation module The module boosts the output voltage to obtain a boosted voltage, so that the voltage value of the boosted voltage is greater than the preset output voltage, thereby being greater than the rated operating voltage of the load, and the boosted voltage is stepped down through the charge and discharge module to obtain the first The discharge voltage makes the first discharge voltage close to the rated operating voltage of the load, which can drive the load of the electrical equipment to operate stably and avoid excessive voltage values from damaging the load, ensuring stable performance of the electrical equipment when the discharge depth of the battery decreases. Release can improve the overall performance, operational stability and operational safety of electrical equipment.

The battery control circuit provided by the embodiment of the present application can be applied to terminal equipment equipped with batteries. The terminal device can be a mobile phone, a tablet, a wearable device, a vehicle-mounted device, an augmented reality (AR)/virtual reality (VR) device, a laptop, or an ultra-mobile personal computer (UMPC). , netbooks, personal digital assistants (personal digital assistants, PDAs), etc. The embodiments of this application do not place any restrictions on the specific types of terminal devices.

Figure 1 exemplarily shows a schematic structural diagram of a terminal device 100. The terminal device 100 may include a power module 110 and a load 120. The power module 110 may include a battery 111. The load 120 may include a processor 10, a memory 20, and an audio module 30. Camera module 40, sensor module 50, input module 60, display module 70 and wireless communication module 80, etc. Among them, the audio module 30 may include a speaker 31 and a microphone 32, etc., the camera module 40 may include a short-focus camera 41, a telephoto camera 42, a flash 43, etc., and the sensor module 50 may include an infrared sensor 51, an acceleration sensor 52, a position sensor 53, Fingerprint sensor 54 and iris sensor 55, etc., the input module 60 may include a touch panel 61, an external input unit 62, etc., and the wireless communication module 80 may include Bluetooth, Optical Wireless, Mobile Communications, Wireless LAN ( Wireless local area network, WLAN), near field communication (NearField Communication, NFC) and ZigBee protocol (ZigBee) and other wireless communication units.

In application, the type of battery 111 can be a single-cell battery according to the number of cells; it can also be a multi-cell battery, specifically a dual-cell battery; depending on the material of the battery negative electrode, it can be a carbon material, specifically artificial graphite. material or natural graphite material; it can also be non-carbon material, specifically silicon material or alloy material, etc. The embodiment of the present application does not limit the specific type of battery 111 in any way. The power module 110 may also include a Coulomb Counter, which may be used to detect the remaining power of the battery 111 or the output voltage of the battery 111 . The power module 110 is used to power the load 120 of the terminal device 100 through the battery 111 .

In an application, the processor 10 may be a central processing unit (CPU), or other general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), or an application specific integrated circuit (Application Specific Integrated). Circuit (ASIC), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

In applications, the memory 20 may be an internal storage unit of the terminal device in some embodiments, such as a hard disk or memory of the terminal device. In other embodiments, the memory 20 may also be an external storage device of the terminal device, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (SD) card, or a flash memory equipped on the terminal device. Flash Card, etc. Further, the memory 20 may also include both an internal storage unit of the terminal device and an external storage device. The memory 20 is used to store operating systems, application programs, boot loaders, data and other programs, such as program codes of computer programs. The memory 20 may also be used to temporarily store data that has been output or is to be output.

It can be understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the terminal device 100. In other embodiments of the present application, the terminal device 100 may include more or less components than shown in the figure, or may combine certain components, or may include different components, for example, it may also include a graphics processor and the like. The components illustrated may be implemented in hardware, software, or a combination of software and hardware.

As shown in Figure 2, the battery control circuit 200 provided by the embodiment of the present application is applied to the terminal device 100. The terminal device 100 includes a battery 111 and a load 120. The battery control circuit 200 includes a charge and discharge module 210, a voltage regulation module 220 and a control module. 230;

The control module 230 is connected to the charge and discharge module 210 and the voltage regulation module 220 respectively;

The control module 230 is used to connect to the battery 111, and when the output voltage of the battery 111 is less than the preset output voltage, send the first discharge signal to the voltage regulation module 220;

The voltage regulating module 220 is used to connect to the battery 111, receive the output voltage of the battery 111 according to the first discharge signal, boost the output voltage, obtain the boosted voltage and send it to the charging and discharging module 210;

The charging and discharging module 210 is used to connect to the load 120 , and when receiving the boosted voltage, step down the boosted voltage to obtain the first discharge voltage and output it to the load 120 .

The following describes the hardware selection of the charge and discharge module 210, voltage regulation module 220 and control module 230 in the battery control circuit 200:

In application, the charge and discharge module 210 can be configured with at least one buck device, which can be a buck DC/DC converter (Direct Current-Direct Current Converter), a buck capacitor, a resistor-capacitor buck, or a current limiting resistor. Or different types of buck devices such as buck integrated chips.

In an application, the voltage regulation module 220 may include at least one buck device and at least one boost device, or at least one buck-boost device, and the selection of the buck device, the boost device, and the buck-boost device and the above selection Consistent and will not be repeated here. The difference is that the voltage regulating module 220 can also select a buck-boost charge pump (Charge Pump) as a buck-boost device, which can improve the efficiency of voltage boosting and bucking. Among them, each buck device/boost device can achieve different buck multiples/boost multiples, or the buck multiples/boost multiples of the buck device/boost device can be adjusted according to actual needs to achieve flexibility. buck/boost effect.

In applications, the control module 230 can be a central processing unit, or other general-purpose processor, digital signal processor, application-specific integrated circuit, off-the-shelf programmable gate array or other programmable logic device, discrete gate or transistor logic device, discrete Hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The control module 230 may be connected to the processor 10 of the terminal device 100, or may directly multiplex the processor 10 of the terminal device 100.

In the application, the battery control circuit 200 can be provided with a fuel gauge, which is connected to the control module 230 and the battery 111 respectively. The control module 230 can read the output voltage of the battery 111 collected by the fuel gauge; the battery control circuit 200 can also be provided with a fuel gauge. Battery 111 management system (Battery Management System, BMS). The battery 111 management system is connected to the control module 230 and the battery 111 respectively. The control module 230 can read the output voltage of the battery 111 collected by the BMS; the control module 230 can also be integrated with an output voltage acquisition unit. , the control module 230 can read the output voltage of the battery 111 by directly connecting to the battery 111 .

The circuit working principles of the charging and discharging module 210, the voltage regulating module 220 and the control module 230 in the battery control circuit 200 are described below:

In applications, the output voltage of the battery 111 will fluctuate according to actual working conditions, including actual working conditions such as ambient temperature, health of the battery 111, remaining capacity of the battery 111, or the size of the load 120. The preset output voltage can be set according to the rated operating voltage of any one or any multiple load 120 elements in the terminal device 100 . For example, the preset output voltage can be greater than or equal to the rated operating voltage of all load 120 elements in the terminal device 100 , assuming that the terminal device 100 is a mobile phone, the preset output voltage may be 3.4V. The embodiment of the present application does not place any limit on the specific size of the preset output voltage. When the output voltage of the battery 111 is less than the preset output voltage, it means that the actual operating voltage of some components of the current terminal device 100 is less than the rated operating voltage, and the control module 230 can send the first discharge signal to the voltage regulation module 220 .

In application, after the voltage regulation module 220 receives the first discharge signal, it can receive the output voltage of the battery 111 according to the first discharge signal, boost the output voltage, obtain the boosted voltage, and send it to the charge and discharge module 210 . Among them, the voltage regulating module 220 can determine the specific voltage boosting factor according to the output voltage of the battery 111 and the preset output voltage. It should be noted that the boosting voltage needs to be greater than the preset output voltage.

In application, when the charging and discharging module 210 receives the boosted voltage, the boosted voltage can be stepped down through a buck device or a buck-boost device to obtain the first discharge voltage and output it to the load 120 . The charge and discharge module 210 can determine the specific voltage reduction factor based on the boost voltage and the preset output voltage. It should be noted that the first discharge voltage needs to be greater than or equal to the preset output voltage and less than the preset maximum voltage.

For example, assuming that the output voltage of the battery 111 is 3.0V, the preset output voltage is 3.4V, and the preset maximum voltage is 3.8V, then the voltage boosting factor needs to be greater than 17/15. Specifically, the voltage boosting factor can be 2 times, and the voltage boosting factor is obtained. The voltage is 6.0V, and the voltage reduction factor needs to be greater than or equal to 17/30 and less than 19/30. The voltage reduction factor can be specifically 17/30, and the first discharge voltage is 3.4V. It should be noted that the embodiments of the present application do not specifically limit the voltage boosting factor and the voltage reducing factor.

In the application, the output voltage of the battery 111 is monitored through the control module 230. When the output voltage of the battery 111 is less than the preset output voltage, the first discharge signal is sent to the voltage regulation module 220, and the output voltage is boosted by the voltage regulation module 220. , to obtain the boosted voltage, so that the voltage value of the boosted voltage is greater than the preset output voltage, and thus greater than the rated operating voltage of the load 120, and the boosted voltage is stepped down through the charge and discharge module 210 to obtain the first discharge voltage, so that the first discharge voltage is obtained. When the discharge voltage is close to the rated operating voltage of the load 120, it can drive the load 120 of the electrical equipment to operate stably and avoid damage to the load 120 due to excessive voltage values, thereby ensuring stable performance release of the electrical equipment when the discharge depth of the battery 111 decreases. , which can improve the overall performance, operational stability and operational safety of electrical equipment.

As shown in Figure 3, in one embodiment, based on the embodiment corresponding to Figure 2, the charge and discharge module 210 is also used to connect to the battery 111 and the power supply device 300, and access the power supply voltage output by the power supply device 300;

Control module 230 is used for:

Detect whether the power supply device 300 supports the preset fast charging protocol;

When the power supply device 300 supports the preset fast charging protocol and the output voltage of the battery 111 is greater than or equal to the preset output voltage, send the first charging signal to the voltage regulation module 220;

When the power supply device 300 does not support the preset fast charging protocol and the output voltage of the battery 111 is greater than or equal to the preset output voltage, send the second charging signal to the charge and discharge module 210;

When the output voltage of the battery 111 is less than the preset output voltage, send the third charging signal to the charging and discharging module 210;

The voltage regulating module 220 is configured to receive the power supply voltage via the charge and discharge module 210 according to the first charging signal, step down the power supply voltage, obtain the first charging voltage and output it to the battery 111;

The charge and discharge module 210 is used for:

According to the second charging signal, the power supply voltage is stepped down to obtain a second discharge voltage and output to the load 120 , or the second discharge voltage is obtained and output to the load 120 and a second charging voltage is obtained and output to the battery. 111;

According to the third charging signal, the power supply voltage is stepped down to obtain a third charging voltage and output to the battery 111 .

In applications, the power supply device 300 may be different types of power supply devices such as a power adapter (Power Adapter), a mobile power bank (Mobile Power Bank), or an external device that supports a reverse charging function. The charging and discharging module 210 can be used to connect to the power supply device 300 and access the power supply voltage output by the power supply device 300 . When the charge and discharge module 210 is used to connect to the power supply device 300, it can also be configured with at least one boost device, which can be a boost DC/DC converter, a boost regulator or a boost integrated chip of different types. The boost device may be configured with at least one buck-boost DC/DC converter or a buck-boost integrated chip or other different types of buck-boost devices. In addition, the charge and discharge module 210 can also be configured with an overvoltage prevention unit, which is used to reduce the voltage or block the voltage input when the voltage input to the charge and discharge module 210 is too high, so as to prevent the voltage boosting device and the voltage reducing device of the charging and discharging module 210 from being damaged. Or the buck-boost device directly receives high voltage and causes damage; the charge-discharge module 210 can also be configured with a voltage stabilizing unit for stabilizing the discharge voltage or charging voltage input to the load 120 or battery 111 to reduce interference and improve charging. Discharge stability.

In the application, when the charging and discharging module 210 is connected to the power supply device 300, the control module 230 can read the parameters of the power supply device 300 through the charging and discharging module 210, including whether to support the preset fast charging protocol and the size of the power supply voltage; the control module 230 may determine the charging mode according to the output voltage of the battery 111 and whether the power supply device 300 supports the preset fast charging protocol. Specifically, when the power supply device 300 supports the preset fast charging protocol and the output voltage of the battery 111 is greater than or equal to the preset output voltage, the first charging signal is sent to the voltage regulation module 220; when the power supply device 300 does not support the preset fast charging protocol When the output voltage of the battery 111 is greater than or equal to the preset output voltage, the second charging signal is sent to the charge and discharge module 210; when the output voltage of the battery 111 is less than the preset output voltage, the third charging signal is sent to the charge and discharge module 210. The circuit working principles of the battery control circuit 200 in the three charging modes are described below:

In application, when the power supply device 300 supports the preset fast charging protocol and the output voltage of the battery 111 is greater than or equal to the preset output voltage, it means that the current battery control circuit 200 can charge the battery 111 through the fast charging mode, and the control module 230 The first charging signal is sent to the voltage regulating module 220. The voltage regulating module 220 receives the power supply voltage through the charging and discharging module 210 according to the first charging signal. At this time, the charging and discharging module 210 does not process the power supply voltage. The voltage regulating module 220 reduces the power supply voltage by reducing the voltage. The voltage device steps down the power supply voltage. When the power remains unchanged, the voltage decreases and the current increases. When the first charging voltage is obtained and output to the battery 111, the battery 111 can be quickly charged through a low voltage and high current method. Charge;

When the power supply device 300 does not support the preset fast charging protocol and the output voltage of the battery 111 is greater than or equal to the preset output voltage, it means that the current battery control circuit 200 can charge the battery 111 through the normal charging mode, and the control module 230 sends a second charge The signal is sent to the charging and discharging module 210. The charging and discharging module 210 receives the power supply voltage and processes the power supply voltage according to the second charging signal. At this time, the voltage regulating module 220 does not receive the power supply voltage and reduces the output voltage of the battery 111 ( Usually the output voltage of the battery 111 is relatively large, such as 5V, 12V, 18V or 20V, etc. If it is directly input to the load 120 or the battery 111, it will easily cause overvoltage damage. The output voltage needs to be reduced to prevent the output voltage from being directly input to the load 120 or the battery 111. ), obtain the second discharge voltage and output it to the load 120, which can make the second discharge voltage close to the preset output voltage, or obtain the second discharge voltage and output it to the load 120, obtain the second charging voltage and output it to the battery 111, you can Realize trickle charging to avoid excessively high voltage values that will cause the temperature of the battery 111 to be too high during charging, affecting the charging efficiency and the life of the battery 111;

When the output voltage of the battery 111 is less than the preset output voltage, it means that the current battery 111 needs to be precharged to increase the output voltage of the battery 111. The control module 230 sends a third charging signal to the charge and discharge module 210, thereby charging the battery in the precharge mode. 111 is charged, and the charging and discharging module 210 receives the power supply voltage and processes the power supply voltage according to the third charging signal. At this time, the voltage regulating module 220 does not receive the power supply voltage, and by reducing the output voltage of the battery 111, the third The charging voltage is output to the battery 111, and the voltage value of the third charging voltage may be equal to the preset precharge voltage. It should be noted that when the output voltage of the battery 111 is less than the preset output voltage, usually the remaining capacity of the current battery 111 is low, and the battery 111 needs to be precharged until the output voltage of the battery 111 increases to the preset output voltage. Avoid large voltage or current being directly input into the battery 111 to cause the life span of the battery 111 to be reduced. The size of the preset precharge voltage can be set according to the preset output voltage, and the preset precharge voltage can be smaller than the preset output voltage. The embodiment of the present application does not limit the specific size of the preset precharge voltage.

In one embodiment, the charging and discharging module 210 is used for:

Detect whether the power supply voltage is greater than or equal to the preset power voltage according to the second charging signal;

When the power supply voltage is greater than the preset power supply voltage, step down the power supply voltage to obtain a second discharge voltage and output it to the load 120, and obtain a second charging voltage and output it to the battery 111;

When the power supply voltage is equal to the preset power supply voltage, the power supply voltage is stepped down to obtain the second discharge voltage and output it to the load 120;

When the power supply voltage is less than the preset power supply voltage, step down the power supply voltage to obtain the second discharge voltage and output it to the load 120, and send the auxiliary discharge signal to the control module 230;

The control module 230 is used to control the battery 111 to output the auxiliary discharge voltage to the charge and discharge module 210 according to the auxiliary discharge signal, so as to increase the voltage value of the second discharge voltage.

In the application, when the battery control circuit 200 charges the battery 111 through the normal charging mode, it also includes a first normal charging mode, a second normal charging mode and a third normal charging mode according to the relationship between the power supply voltage and the preset power supply voltage. mode, the above three common charging modes are explained below:

In application, the charging and discharging module 210 can determine the type of the normal charging mode by comparing the relationship between the power supply voltage and the preset power supply voltage according to the second charging signal;

When the power supply voltage is greater than the preset power supply voltage, it means that the current power supply voltage is large enough to supply power to the load 120 and charge the battery 111 at the same time. The battery control circuit 200 works in the first normal charging mode, and the charge and discharge module 210 changes the power supply voltage. The voltage is reduced and divided to obtain a second discharge voltage and output to the load 120 , and a second charging voltage is obtained and output to the load 120 . It should be noted that when the battery control circuit 200 operates in the normal charging mode, the charge and discharge module 210 can convert the power supply voltage to the second discharge voltage preferentially to ensure stable performance release of the load 120, and convert the remaining voltage to the second discharge voltage. The charging voltage and the second discharge voltage need to be greater than or equal to the preset output voltage and less than the preset maximum voltage;

When the power supply voltage is equal to the preset power voltage, only the load 120 can be supplied with power. The battery control circuit 200 works in the second normal charging mode. The charge and discharge module 210 steps down the power supply voltage to obtain the second discharge voltage and output it to Load 120;

When the power supply voltage is lower than the preset power supply voltage, sufficient voltage value cannot be provided to make the load 120 work at the rated operating voltage. The battery control circuit 200 works in the third normal charging mode, and the charge and discharge module 210 steps down the power supply voltage to obtain The second discharge voltage is output to the load 120, and an auxiliary discharge signal is sent to the control module 230. The control module 230 controls the battery 111 to output the auxiliary discharge voltage to the charge and discharge module 210 according to the auxiliary discharge signal to increase the voltage value of the second discharge voltage. , so that the second discharge voltage can reach the preset output voltage, ensuring stable performance of the load 120.

In application, when the battery control circuit 200 works in the normal charging mode, the power supply voltage can be converted to the second discharge voltage first to ensure the stable performance of the load 120, and the remaining voltage can be used when the power supply voltage has a margin. Convert to the second discharge voltage to improve the power conversion efficiency; when the power supply voltage is insufficient, the auxiliary discharge voltage can be supplemented through the battery 111 so that the second discharge voltage can reach the preset output voltage to ensure stable performance of the load 120, thereby improving the terminal The overall performance and operational stability of the device 100.

In one embodiment, the control module 230 is also configured to send a second discharge signal to the charge and discharge module 210 when the output voltage of the battery 111 is greater than or equal to the preset output voltage;

The charge and discharge module 210 is used to process the output voltage according to the second discharge signal to obtain a third discharge voltage and output it to the load 120 .

In application, the control module 230 may determine the discharge mode according to the output voltage of the battery 111 . Specifically, when the output voltage of the battery 111 is less than the preset output voltage, the first discharge signal is sent to the voltage regulation module 220, and the battery control circuit 200 works in the low-voltage discharge mode; when the output voltage of the battery 111 is greater than or equal to the preset output voltage When, the second discharge signal is sent to the charge and discharge module 210, and the battery control circuit 200 operates in the high-voltage discharge mode. For the working principle of the circuit in the low-voltage discharge mode, please refer to the relevant description in the embodiment corresponding to FIG. 2 .

In application, when the battery control circuit 200 operates in the high-voltage discharge mode, the charge and discharge module 210 can detect whether the output voltage is greater than or equal to the preset maximum voltage according to the second discharge signal. When the output voltage is greater than or equal to the preset maximum voltage, Step down the output voltage to obtain the third discharge signal and output it to the load 120 to avoid overvoltage damage caused by directly outputting an excessive output voltage to the load 120; when the output voltage is less than the preset maximum voltage, the output voltage can be directly output To the load 120, the output voltage can also be processed through the voltage stabilizing unit to obtain the third discharge voltage and output to the load 120 to improve the stability of the third discharge voltage.

It should be noted that when the output voltage of the battery 111 is greater than or equal to the preset output voltage, the battery control circuit 200 can simultaneously charge the battery 111 in the fast charging mode and supply power to the load 120 in the high-voltage discharge mode; when the battery When the output voltage of 111 is greater than or equal to the preset output voltage, the battery control circuit 200 can work in the normal charging mode at the same time, and according to the relationship between the power supply voltage and the preset power voltage, it can simultaneously discharge the load 120 and charge the battery 111 Charging can also only supply power to the load 120, or it can also supply power to the load 120 through the power supply voltage and the output voltage at the same time; when the output voltage of the battery 111 is less than the preset output voltage, the battery control circuit 200 can simultaneously charge the battery in the precharge mode. The battery 111 is charged and supplies power to the load 120 in a low voltage discharge mode.

In the application, the control module 230 detects whether the power supply device 300 supports the preset fast charging protocol, and detects the relationship between the output voltage of the battery 111 and the preset output voltage to match the best working mode under different working conditions to achieve Flexible adjustment of the working mode of the battery control circuit 200 can improve power conversion efficiency, charging efficiency, and discharging efficiency.

As shown in Figure 4, in one embodiment, based on the embodiment corresponding to Figure 3, the voltage regulating module 220 includes a voltage boosting unit 221 and a voltage reducing unit 222;

The first end of the boost unit 221 and the first end of the buck unit 222 are connected to the first end of the charge and discharge module 210 , and the second end of the boost unit 221 and the second end of the buck unit 222 are connected to the charge and discharge module 210 The second end of the boost unit 221 and the control end of the buck unit 222 are connected to the control module 230; the second end of the boost unit 221 and the second end of the buck unit 222 are used to connect to the battery 111 ;

The second terminal of the voltage boosting unit 221 is used to receive the output voltage of the battery 111, and the first terminal of the voltage reducing unit 222 is used to receive the power supply voltage via the charge and discharge module 210;

The boosting unit 221 is configured to receive the output voltage according to the first discharge signal, boost the output voltage, obtain the boosted voltage, and send it to the charging and discharging module 210;

The voltage reducing unit 222 is configured to receive the power supply voltage according to the first charging signal, step down the power supply voltage, obtain the first charging voltage and output it to the battery 111 .

It should be noted that the first end of the voltage boosting unit 221 and the first end of the voltage reducing unit 222 constitute the first end of the voltage regulating module 220, and the second end of the voltage boosting unit 221 and the second end of the voltage reducing unit 222 constitute The second end of the voltage regulating module 220, the control end of the voltage boosting unit 221 and the control end of the voltage reducing unit 222 in FIG. 4 are multiplexed as the control end of the voltage regulating module 220.

In application, the voltage regulation module 220 may include a boost unit 221 and a buck unit 222. The boost unit 221 may be composed of a boost device such as a boost DC/DC converter or a boost charge pump, and the buck unit 222 may be It consists of step-down devices such as step-down DC/DC converters or step-down charge pumps.

In application, the boost unit 221 is used to receive the output voltage of the battery 111 according to the first discharge signal, boost the output voltage, obtain the boosted voltage, and send it to the charge and discharge module 210 . The setting of the voltage boosting factor may refer to the relevant descriptions of the above embodiments and will not be described again here.

In the application, the voltage reduction unit 222 is used to receive the power supply voltage via the charge and discharge module 210 according to the first charging signal. At this time, the charge and discharge module 210 will not process the power supply voltage, and the voltage reduction unit 222 will step down the power supply voltage. When the power remains constant, the voltage decreases and the current increases. When the first charging voltage is obtained and output to the battery 111 , the battery 111 can be quickly charged in a low voltage and high current manner.

In the application, when the boost unit 221 uses a boost voltage pump and the buck unit 222 uses a buck voltage pump, the voltage regulation module 220 can choose to use a step-up and step-down voltage pump to implement the step-up and step-down function. Compared with using a step-up and step-down voltage pump, DC/DC converter can improve the voltage conversion efficiency, and can also reduce the rated current of the power inductor in the buck-boost device, thereby reducing the volume of the power inductor used, thereby reducing the area occupied in the motherboard, and improving the terminal equipment 100 Wiring flexibility and reducing voltage loss of the terminal equipment 100.

As shown in Figure 5, in one embodiment, based on the embodiment corresponding to Figure 3, a protection module 240 is also included, and the protection module 240 is connected to the charge and discharge module 210 and the voltage regulation module 220 respectively;

Control module 230 is used for:

When the output voltage of the battery 111 is less than the preset output voltage, send a shutdown signal to the voltage regulation module 220;

When the output voltage of the battery 111 is greater than or equal to the preset output voltage, send a turn-on signal to the voltage regulating module 220;

The voltage regulating module 220 is used for:

Control the protection module 240 to shut down according to the shutdown signal;

Control the protection module 240 to be turned on according to the turn-on signal;

Protection module 240 is used for:

Receive the boosted voltage and send it to the charge and discharge module 210 when turned off, and block the boosted voltage from being sent to the power supply device 300;

When it is turned on, the power supply voltage output by the power supply device 300 is connected and sent to the charge and discharge module 210 .

In application, the battery control circuit 200 may also be provided with a protection module 240 , and the protection module 240 is arranged between the charging and discharging module 210 and the voltage regulating module 220 . The protection module 240 may include at least one electronic switch. The electronic switch may be a device or circuit with an electronic switching function, such as a triode, a thin film field effect transistor (TFT), or a composite logic gate circuit. Specifically, it may be a metal oxide Metal Oxide Semiconductor Field Effect Transistor (MOSFET). The circuit working principle of the protection module 240 is described below:

In application, the control module 230 can detect the output voltage of the battery 111 in real time. When the output voltage of the battery 111 is less than the preset output voltage, the battery control circuit 200 can run the precharge mode and the low-voltage discharge mode at the same time. At this time, the control module 230 can By sending a shutdown signal to the voltage regulation module 220, the voltage regulation module 220 controls the protection module 240 to shut down. The protection module 240 can receive the boost voltage and send it to the charge and discharge module 210, and block the boost voltage from being sent to the power supply device 300. This prevents the boosted voltage from being output to the power supply device 300 in reverse, thereby improving power safety. It should be noted that when the protection module 240 is turned off, the battery control circuit 200 can receive the power supply voltage through the charge and discharge module 210 and charge the battery 111 in the precharge mode.

In application, when the output voltage of the battery 111 is greater than or equal to the preset output voltage, the battery control circuit 200 can run the fast charging mode and the high-voltage discharge mode at the same time, or can only run the normal charging mode or only the high-voltage discharge mode. The time control module 230 can send a turn-on signal to the voltage regulating module 220. The voltage regulating module 220 controls the protection module 240 to turn on. The protection module 240 can access the power supply voltage output by the power supply device 300 and send it to the charge and discharge module 210, so that The battery control circuit 200 can stably access the power supply voltage sent by the power supply device 300 .

As shown in Figure 6, in one embodiment, based on the embodiment corresponding to Figures 4 and 5, the voltage regulating module 220 also includes a protection module switch 223. The first end of the protection module switch 223 is connected to the protection module 240, and the protection module 220 is connected to the protection module 240. The second end of the module switch 223 is connected to the control module 230;

Protection module switch 223 is used for:

Control the protection module 240 to shut down according to the shutdown signal;

The protection module 240 is controlled to be turned on according to the turn-on signal.

It should be noted that in FIG. 6 , the second terminal of the protection module 240 , the control terminal of the boost unit 221 and the control terminal of the buck unit 222 are multiplexed and connected to the control module 230 .

In application, the voltage regulation module 220 may also include a protection module switch 223. The protection module switch 223 may control the protection module 240 to turn off in response to a turn-off signal, and control the protection module 240 to turn on in response to a turn-on signal. The protection module 240 can be turned on when the level is low and turned off when the level is high; it can also be turned on when the level is high and turned off when the level is low. When the protection module switch 223 needs to output a high level to control the on-off state of the protection module 240, it can output a high-level signal according to the off signal or the on signal. The voltage of the high-level signal (for example, 12V) is usually higher than the control level. The maximum voltage value that the module 230 can output (for example, 5V), and the protection module switch 223 can generate a high-level signal through the boost unit 221. Controlling the on-off state of the protection module 240 through the protection module switch 223 can improve the control of the protection module 240. stability, thereby improving the working stability of the battery control circuit 200.

As shown in Figure 7, in one embodiment, based on the embodiment corresponding to Figure 3, the charging and discharging module 210 includes a charging port 211, a discharging port 212, a charging and discharging unit 213 and an auxiliary charging unit;

The first end of the charging port 211 is respectively connected to the first end of the charging and discharging unit 213, the first end of the auxiliary charging unit and the first end of the voltage regulating module 220, and the second end of the charging and discharging unit 213 is respectively connected to the first end of the discharging port 212. The first end, the second end of the auxiliary charging unit and the second end of the voltage regulation module 220 are connected. The control end of the charge and discharge unit 213 and the control end of the auxiliary charging unit are connected to the control module 230; the second end of the charge and discharge unit 213 The second end of the auxiliary charging unit is used to connect to the battery 111, the second end of the charging port 211 is used to connect to the power supply device 300, and the second end of the discharge port 212 is used to connect to the load 120;

The second end of the charging port 211 is used to access the power supply voltage output by the power supply device 300. The first end of the charging port 211 is used to send the power supply voltage to the first end of the charging and discharging unit 213, the first end of the auxiliary charging unit or the regulating device. The first end of the voltage module 220, the control end of the charging and discharging unit 213 is used to receive the second charging signal, and the control end of the auxiliary charging unit is used to receive the third charging signal;

The charge and discharge unit 213 is configured to receive the power supply voltage according to the second charging signal, step down the power supply voltage, obtain the second discharge voltage and output it to the load 120, or obtain the second discharge voltage and output it to the load 120 and obtain The second charging voltage is output to the battery 111;

The auxiliary charging unit is configured to receive the power supply voltage according to the third charging signal, step down the power supply voltage, obtain the third charging voltage, and output it to the battery 111 .

It should be noted that the first end of the charge and discharge unit 213 and the first end of the auxiliary charging unit constitute the first end of the charge and discharge module 210, and the second end of the charge and discharge unit 213 and the first end of the auxiliary charging unit constitute a charge and discharge module. As for the second terminal of the module 210, in FIG. 7, the control terminals of the charge and discharge unit 213 and the auxiliary discharge unit 214 are multiplexed and connected to the control module 230.

In application, the charging and discharging module 210 may include a charging port 211, a discharging port 212, a charging and discharging unit 213, and an auxiliary discharging unit 214. The charging port 211 is used to access the power supply voltage output by the power supply device 300; the discharging port 212 is used to Output the second discharge voltage to the load 120; the charge and discharge unit 213 is used to step down the power supply voltage when running the normal charging mode, obtain the second discharge voltage and output it to the load 120, or obtain the second discharge voltage and output it to the load 120. The load 120 obtains the second charging voltage and outputs it to the battery 111; the auxiliary charging unit is used to step down the power supply voltage when running the precharge mode, obtain a third charging signal and output it to the battery 111.

In one embodiment, the charging and discharging unit 213 is configured to, when the first end of the charging and discharging unit 213 receives the boosted voltage, step down the boosted voltage to obtain a first discharge voltage and output it to the discharge port 212 .

In the application, when the boost unit 221 sends the boost unit 221 to the charge and discharge module 210, the charge and discharge module 210 calls the charge and discharge unit 213 to step down the voltage of the boost unit 221 to execute the low voltage discharge mode. Specifically, the step down For the method and blood pressure reducing effect, reference can be made to the relevant descriptions of the above embodiments and will not be described again here.

In one embodiment, the control module 230 is configured to control the battery 111 to output the auxiliary discharge voltage to the second end of the charge and discharge unit 213 according to the auxiliary discharge signal, so as to increase the voltage value of the second discharge voltage.

In application, when the control module 230 controls the battery 111 to output the auxiliary discharge voltage to the charge and discharge module 210 according to the auxiliary discharge signal, the charge and discharge module 210 controls the auxiliary discharge voltage to be output to the charge and discharge unit 213 to achieve an increase in the second discharge voltage. value.

In the application, when the output voltage is greater than or equal to the preset output voltage, the power supply voltage is reduced by the charge and discharge unit 213 in the normal charging mode. When the output voltage is less than the preset output voltage, the power supply voltage is reduced by the auxiliary charging unit. The voltage reduction is performed so that the battery control circuit 200 can flexibly call the charge and discharge unit 213 and the auxiliary charging unit according to the power supply voltage to realize flexible switching between the normal charging mode and the precharge mode.

As shown in Figure 8, in one embodiment, based on the embodiment corresponding to Figure 7, the first end of the charging port 211 is connected to the first end of the protection module 240, and the first end of the charging and discharging unit 213 is connected to the auxiliary charging unit. The first end is connected to the second end of the protection module 240;

Protection module 240 is used for:

Receive the boosted voltage and send it to the charge and discharge unit 213 when turned off, and block the boosted voltage from being sent to the power supply device 300;

When it is turned on, the power supply voltage output by the power supply device 300 is connected and sent to the charging and discharging unit 213 or the voltage reducing unit 222 .

It should be noted that in Figure 8, the control end of the voltage boost unit 221, the control end of the voltage reduction unit 222 and the second end of the protection module switch 223 are multiplexed as the control end of the voltage regulation module 220, the charge and discharge unit 213 and the auxiliary discharge The control side of unit 214 is multiplexed.

In application, the protection module 240 can receive the boost voltage and send it to the charge and discharge unit 213 when turned off, and block the boost voltage from being sent to the power supply device 300 without affecting the power supply voltage input to the auxiliary discharge unit 214, so that The battery control circuit 200 can operate in precharge mode and low voltage discharge mode simultaneously.

In application, the protection module 240 can access the power supply voltage output by the power supply device 300 when it is turned on, and send it to the charge and discharge unit 213, so that the battery control circuit 200 can run the fast charge charging mode and the high voltage discharge mode at the same time.

In one embodiment, the charge and discharge unit 213 includes a charge and discharge unit 213 switch 2131, the auxiliary discharge unit 214 includes an auxiliary discharge unit 214 switch 2131, the charge and discharge unit 213 switch 2131 and the auxiliary discharge unit 214 switch 2131 are connected to the control module 230;

The charge and discharge unit 213 switch 2131 is used to control the on-off state of the charge and discharge unit 213 and the battery 111;

The switch 2131 of the auxiliary discharge unit 214 is used to control the on-off state of the auxiliary discharge unit 214 and the battery 111 .

In applications, the switch 2131 of the charging and discharging unit 213 and the switch 2131 of the auxiliary discharging unit 214 may be electronic switches. For electronic switches, reference may be made to the above related descriptions, which will not be described again here.

In application, the control module 230 can control the on-off state of the switch 2131 of the charging and discharging unit 213 to control the on-off state of the charging and discharging unit 213 and the battery 111. Specifically, when the switch 2131 of the charging and discharging unit 213 is turned on, the charging and discharging The unit 213 is connected to the battery 111. When the switch 2131 of the charging and discharging unit 213 is turned off, the charging and discharging unit 213 and the battery 111 are disconnected. The control module 230 can also control the on-off state of the switch 2131 of the auxiliary discharge unit 214 to control the on-off state of the auxiliary discharge unit 214 and the battery 111. Specifically, when the switch 2131 of the auxiliary discharge unit 214 is turned on, the auxiliary discharge unit 214 and the battery 111 are turned on and off. The battery 111 is connected, and when the switch 2131 of the auxiliary discharge unit 214 is turned off, the auxiliary discharge unit 214 and the battery 111 are disconnected.

In application, when the battery control circuit 200 is operating in the high-voltage discharge mode and the fast charge mode, turning off the switch 2131 of the auxiliary discharge unit 214 can avoid the reverse output of the output voltage to the discharge via the auxiliary discharge unit 214 in the high-voltage discharge mode. Port 212; can also prevent the power supply voltage from being output to the battery 111 via the auxiliary discharge unit 214 in the fast charging mode, affecting the efficiency of fast charging.

In application, when the battery control circuit 200 operates in the low-voltage discharge mode, the switch 2131 of the charge and discharge unit 213 can be turned off to prevent the charge and discharge unit 213 from inputting the processed first discharge voltage to the battery 111 after receiving the boosted voltage. , thereby avoiding loops causing discharge and charging cycles of the battery 111 and improving the working stability of the battery control circuit 200 .

FIG. 9 exemplarily shows a structural diagram when the charge and discharge unit 213 includes the charge and discharge unit 213 switch 2131, the auxiliary discharge unit 214 includes the auxiliary discharge unit 214 switch 2131, and the protection module 240 adopts a MOS tube.

As shown in Figure 10, the battery control method provided by the embodiment of the present application is applied to the control module of the battery control circuit provided by the above embodiment, including the following steps S1001 to step S1003:

Step S1001: When the output voltage of the battery is less than the preset output voltage, send a first discharge signal to the voltage regulation module;

Step S1002: The voltage regulation module receives the output voltage of the battery according to the first discharge signal, boosts the output voltage, obtains the boosted voltage, and sends it to the charge and discharge module;

Step S1003: Receive the boosted voltage through the charge and discharge module, step down the boosted voltage, obtain the first discharge voltage and output it to the load.

In application, the battery control method implemented by the control module of the battery control circuit may refer to the relevant descriptions of the above embodiments, and will not be described again here.

It should be understood that the sequence number of each step in the above embodiment does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

Embodiments of the present application also provide a computer-readable storage medium that stores a computer program. When the computer program is executed by a processor, the steps in each of the above battery control method embodiments can be implemented.

In the above embodiments, each embodiment is described with its own emphasis. For parts that are not detailed or documented in a certain embodiment, please refer to the relevant descriptions of other embodiments.

Those of ordinary skill in the art can appreciate that the modules and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

In the embodiments provided in this application, it should be understood that the disclosed terminal device and method can be implemented in other ways. For example, the terminal device embodiments described above are only illustrative. For example, the division of modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules or components may be combined. Either it can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, indirect coupling or communication connection of devices or modules, and may be in electrical, mechanical or other forms.

The above-described embodiments are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still implement the above-mentioned implementations. The technical solutions described in the examples are modified, or some of the technical features are equivalently replaced; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions in the embodiments of this application, and should be included in within the protection scope of this application.

Claims (10)

1. The battery control circuit is applied to terminal equipment, and the terminal equipment comprises a battery and a load, and is characterized by comprising a charge-discharge module, a voltage regulation module and a control module;

the control module is respectively connected with the charge and discharge module and the voltage regulating module;

the control module is used for being connected with the battery, and sending a first discharging signal to the voltage regulating module when the output voltage of the battery is smaller than a preset output voltage;

the voltage regulating module is used for being connected with the battery, receiving the output voltage of the battery according to the first discharging signal, boosting the output voltage to obtain boosted voltage and sending the boosted voltage to the charging and discharging module;

The charge-discharge module is used for being connected with the load, and reducing the boosted voltage when receiving the boosted voltage to obtain a first discharge voltage and outputting the first discharge voltage to the load.

2. The battery control circuit of claim 1, wherein the charge-discharge module is further configured to connect to the battery and a power device and to access a power supply voltage output by the power device;

the control module is used for:

detecting whether the power supply equipment supports a preset fast charging protocol or not;

when the power supply equipment supports a preset fast charge protocol and the output voltage of the battery is greater than or equal to a preset output voltage, a first charging signal is sent to the voltage regulating module;

when the power supply equipment does not support a preset fast charge protocol and the output voltage of the battery is greater than or equal to a preset output voltage, a second charge signal is sent to the charge-discharge module;

when the output voltage of the battery is smaller than a preset output voltage, a third charging signal is sent to the charging and discharging module;

the voltage regulating module is used for receiving the power supply voltage through the charging and discharging module according to the first charging signal, reducing the power supply voltage to obtain a first charging voltage and outputting the first charging voltage to the battery;

The charging and discharging module is used for:

reducing the power supply voltage according to the second charging signal to obtain a second discharging voltage and outputting the second discharging voltage to the load, or obtaining a second discharging voltage and outputting the second discharging voltage to the load and obtaining a second charging voltage and outputting the second discharging voltage to the battery;

and according to the third charging signal, reducing the power supply voltage to obtain a third charging voltage and outputting the third charging voltage to the battery.

3. The battery control circuit of claim 2, wherein the charge-discharge module is to:

detecting whether the power supply voltage is greater than or equal to a preset power supply voltage according to the second charging signal;

when the power supply voltage is larger than the preset power supply voltage, the power supply voltage is reduced to obtain the second discharging voltage and output the second discharging voltage to the load, and the second charging voltage is obtained and output to the battery;

when the power supply voltage is equal to the preset power supply voltage, reducing the power supply voltage to obtain a second discharge voltage and outputting the second discharge voltage to the load;

when the power supply voltage is smaller than the preset power supply voltage, the power supply voltage is reduced to obtain a second discharge voltage, the second discharge voltage is output to the load, and an auxiliary discharge signal is sent to the control module;

The control module is used for controlling the battery to output auxiliary discharge voltage to the charge-discharge module according to the auxiliary discharge signal so as to improve the voltage value of the second discharge voltage.

4. The battery control circuit of claim 2, further comprising a protection module connected to the charge and discharge module and the voltage regulation module, respectively;

the control module is used for:

when the output voltage of the battery is smaller than a preset output voltage, a turn-off signal is sent to the voltage regulating module;

when the output voltage of the battery is greater than or equal to a preset output voltage, a conduction signal is sent to the voltage regulating module;

the voltage regulating module is used for:

controlling the protection module to be turned off according to the turn-off signal;

controlling the protection module to be conducted according to the conduction signal;

the protection module is used for:

receiving the boosted voltage and sending the boosted voltage to the charge-discharge module when the power supply is turned off, and blocking the boosted voltage from being sent to the power supply equipment;

and when the power supply is conducted, the power supply voltage output by the power supply equipment is connected and sent to the charging and discharging module.

5. The battery control circuit according to any one of claims 1 to 4, wherein the voltage regulating module includes a voltage boosting unit and a voltage reducing unit;

The first end of the voltage boosting unit and the first end of the voltage reducing unit are connected with the first end of the charge-discharge module, the second end of the voltage boosting unit and the second end of the voltage reducing unit are connected with the second end of the charge-discharge module, and the control end of the voltage boosting unit and the control end of the voltage reducing unit are connected with the control module; the second end of the voltage boosting unit and the second end of the voltage reducing unit are used for being connected with the battery;

the second end of the step-up unit is used for receiving the output voltage of the battery, and the first end of the step-down unit is used for receiving the power supply voltage through the charge-discharge module;

the boosting unit is used for receiving the output voltage according to the first discharge signal, boosting the output voltage to obtain a boosted voltage and sending the boosted voltage to the charge-discharge module;

the voltage reducing unit is used for receiving the power supply voltage according to a first charging signal, reducing the power supply voltage to obtain a first charging voltage and outputting the first charging voltage to the battery.

6. The battery control circuit of claim 5, wherein the voltage regulation module further comprises a protection module switch, a first end of the protection module switch being connected to the protection module, a second end of the protection module switch being connected to the control module;

The protection module switch is used for:

controlling the protection module to be turned off according to a turn-off signal;

and controlling the conduction of the protection module according to the conduction signal.

7. The battery control circuit according to any one of claims 1 to 4, wherein the charge-discharge module includes a charge port, a discharge port, a charge-discharge unit, and an auxiliary charge unit;

the first end of the charging port is respectively connected with the first end of the charging and discharging unit, the first end of the auxiliary charging unit and the first end of the voltage regulating module, the second end of the charging and discharging unit is respectively connected with the first end of the discharging port, the second end of the auxiliary charging unit and the second end of the voltage regulating module, and the control end of the charging and discharging unit and the control end of the auxiliary charging unit are connected with the control module; the second end of the charging and discharging unit and the second end of the auxiliary charging unit are used for being connected with the battery, the second end of the charging port is used for being connected with a power supply device, and the second end of the discharging port is used for being connected with the load;

the second end of the charging port is used for accessing the power supply voltage output by the power supply device, the first end of the charging port is used for sending the power supply voltage to the first end of the charging and discharging unit, the first end of the auxiliary charging unit or the first end of the voltage regulating module, the control end of the charging and discharging unit is used for receiving a second charging signal, and the control end of the auxiliary charging unit is used for receiving a third charging signal;

The charging and discharging unit is used for receiving the power supply voltage according to the second charging signal, reducing the power supply voltage to obtain a second discharging voltage and outputting the second discharging voltage to the load, or obtaining a second discharging voltage and outputting the second discharging voltage to the load and obtaining a second charging voltage and outputting the second charging voltage to the battery;

the auxiliary charging unit is used for receiving the power supply voltage according to the third charging signal, reducing the power supply voltage to obtain a third charging voltage and outputting the third charging voltage to the battery.

8. A terminal device, comprising a battery, a load and a battery control circuit according to any one of claims 1 to 7, wherein the battery is connected to a charge-discharge module, a voltage regulation module and a control module, respectively, and the load is connected to the battery and the charge-discharge module, respectively.

9. A battery control method applied to the control module of the battery control circuit according to any one of claims 1 to 7, characterized by comprising:

when the output voltage of the battery is smaller than the preset output voltage, a first discharging signal is sent to the voltage regulating module;

receiving the output voltage of the battery through the voltage regulating module according to the first discharging signal, boosting the output voltage to obtain boosted voltage and sending the boosted voltage to the charging and discharging module;

And receiving the boosted voltage through the charge-discharge module, and reducing the boosted voltage to obtain a first discharge voltage and outputting the first discharge voltage to the load.

10. A computer-readable storage medium storing a computer program, characterized in that the computer program, when being executed by a processor, implements the steps of the circuit control method according to claim 9.