WO2024041427A1

WO2024041427A1 - Battery metering system, electronic device and control method

Info

Publication number: WO2024041427A1
Application number: PCT/CN2023/113284
Authority: WO
Inventors: 徐超
Original assignee: 维沃移动通信有限公司
Priority date: 2022-08-22
Filing date: 2023-08-16
Publication date: 2024-02-29
Also published as: CN115291120A

Abstract

A battery metering system, an electronic device, and a control method for the battery metering system. The battery metering system comprises: a power metering chip (10), which comprises a protective driving circuit (100), a power supply module (101), a control circuit (102), and a functional component (103), wherein a first output terminal of the power supply module (101) is connected to the protective driving circuit (100) and is used for supplying power to the protective driving circuit (100), a second output terminal of the power supply module (101) is connected to one terminal of the control circuit (102), and the other terminal of the control circuit (102) is connected to the functional component (103); a central processing unit (11) which is connected to the power metering chip (10) and used for sending a control signal to the power metering chip (10); and a control circuit (102) which is used for controlling the functional component (103) to be powered off and reset according to the instruction of the control signal.

Description

Battery metering system, electronic device and control method

cross reference

This application claims priority to the Chinese patent application filed with the China Patent Office on August 22, 2022, with application number 202211005224.2 and titled "Battery Metering System, Electronic Device and Control Method". The entire content of this application is incorporated by reference in in this application.

Technical field

The present application relates to the field of battery technology, and in particular, to a battery metering system, electronic equipment and control method.

Background technique

With the development of science and technology, the types of electronic products are becoming more and more abundant, and users have higher and higher requirements for electronic products. Among them, a good power experience greatly improves the competitiveness of electronic products. Setting up an independent fuel gauge chip in the battery metering system of electronic products can not only accurately provide the battery's power, but also make accurate calculations and early warnings about the reliability and safety of the battery. Among them, the fuel gauge chip includes a power supply module, system clock, communication module, processor and high-end protection driver module. The power supply module supplies power to other modules in the fuel gauge chip. After the power supply module supplies power to other modules in the fuel gauge chip, the fuel gauge chip converts the analog quantity of the collected battery information into a digital quantity and communicates with the central processor of the whole machine. (Central Processing Unit, CPU) communicates.

In practical applications, when the fuel gauge chip encounters abnormalities such as communication failure and memory bit flipping, it will seriously affect the normal operation of the fuel gauge chip and the entire machine. In related technologies, a load switch is used to directly power off the power supply module and then reset it. The entire fuel gauge chip, the protection drive circuit in the fuel gauge chip will also be shut down after the power supply module is powered off, causing the entire electronic device to be powered off. The reliability of the battery metering system of the electronic device is low, affecting the user experience.

Contents of the invention

The purpose of the embodiments of this application is to provide a battery metering system, electronic equipment and control method, It can solve the problem of low reliability of the battery metering system of electronic equipment.

In a first aspect, embodiments of the present application provide a battery metering system and a fuel gauge chip. The fuel gauge chip includes a protection drive circuit, a power supply module, a control circuit and functional components; the first output end of the power supply module is connected to the The protection drive circuit is connected to supply power to the protection drive circuit; the second output end of the power supply module is connected to one end of the control circuit, and the other end of the control circuit is connected to the functional component; the central processing unit The central processor is connected to the fuel gauge chip and is used to send a control signal to the fuel gauge chip; the control circuit is used to control the functional component to lose power and reset according to the instructions of the control signal. .

It can be seen that, except for the protection drive circuit, the remaining functional components in the fuel gauge chip are controlled by the control circuit to lose power and reset according to the instructions of the central processor, while the protection drive circuit is directly powered by the power supply module. When the functional components in the meter chip lose power and are reset, the protection drive circuit is always powered and will not shut down, which will not cause the entire electronic device to be powered off, improving the reliability of the battery metering system and improving the efficiency of the battery metering system. User experience.

In a second aspect, embodiments of the present application provide an electronic device, including: a battery, a fuel gauge chip and a central processor. The fuel gauge chip includes a protection drive circuit, a power supply module, a control circuit and functional components; the battery The output end is connected to the input end of the power supply module, the first output end of the power supply module is connected to the protection drive circuit, and is used to supply power to the protection drive circuit; the second output end of the power supply module is connected to the protection drive circuit. One end of the control circuit is connected, and the other end of the control circuit is connected to the functional component; the central processor is connected to the fuel gauge chip, and is used to send a control signal to the fuel gauge chip; the control circuit , used to control the functional component to lose power and reset according to the instructions of the control signal.

In a third aspect, embodiments of the present application provide a control method for a battery metering system, which includes: obtaining status data of a fuel gauge chip; when the status data is abnormal, sending a control signal to the fuel gauge chip; through the The control circuit of the fuel gauge chip controls the functional components in the fuel gauge chip except the protection drive circuit to lose power and reset according to the instructions of the control signal; wherein, the first link between the protection drive circuit and the power supply module of the fuel gauge chip The output end is connected, and the power supply module is used to continuously supply power to the protection drive circuit.

It can be seen that when the status data of the fuel gauge chip is abnormal, the remaining functional components in the fuel gauge chip except the protection drive circuit are controlled by the control circuit to lose power and reset according to the instructions of the central processor, while the protection drive circuit The circuit is directly powered by the power supply module. When the functional components in the fuel gauge chip lose power and are reset, the protection drive circuit is always powered and will not shut down. This will prevent the entire electronic device from losing power, improve the reliability of the battery metering system, and improve the user experience.

Description of drawings

Figure 1 shows a schematic structural diagram of a battery metering system provided by an embodiment of the present application;

Figure 2 shows a schematic diagram of the internal structure of a fuel gauge chip provided by an embodiment of the present application;

Figure 3 shows a schematic diagram of the level sequence of a control signal provided by an embodiment of the present application;

Figure 4 shows a schematic structural diagram of an electronic device provided by an embodiment of the present application;

Figure 5 shows a specific structural schematic diagram of an electronic device provided by an embodiment of the present application;

FIG. 6 shows a schematic flowchart of a control method for a battery metering system provided by an embodiment of the present application.

Reference signs:
Fuel gauge chip: 10; protection drive circuit: 100; power supply module: 101; control circuit: 102;
Functional components: 103; Reset interface: 104;
Central processing unit: 11; input and output interface: 110;
Batteries: 12.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of this application.

The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the figures so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in orders other than those illustrated or described herein, and that "first,""second," etc. are distinguished Objects are usually of one type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects are in an "or" relationship.

The battery metering system, the electronic device and the control method of the battery metering system provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings 1 to 6 through specific embodiments and application scenarios.

As shown in Figure 1, the fuel metering system includes: a fuel gauge chip 10 and a central processor 11. The fuel gauge chip 10 includes a protection drive circuit 100, a power supply module 101, a control circuit 102 and a functional component 103. The first output of the power supply module 101 The second output end of the power supply module 101 is connected to one end of the control circuit 102, and the other end of the control circuit 102 is connected to the functional component 103. The central processing unit 11 is connected to the protection drive circuit 100. The fuel gauge chip 10 is connected to send a control signal to the fuel gauge chip 10, and the control circuit 102 is used to control the functional component 103 to lose power and reset according to the instructions of the control signal.

As shown in Figure 2, the internal structure of the fuel gauge chip 10 is shown. The fuel gauge chip 10 includes a protection drive circuit 100, a power supply module 101, a control circuit 102 and a functional component 103. The functional component 103 includes but is not limited to a system. Clocks, processors, memories, communication modules, coulomb counters, and composite ADCs.

Specifically, the power supply module 101 supplies power to the functional components 103 in the fuel gauge chip 10 through the control circuit 102. The protection drive circuit 100 is directly and continuously powered by the power supply module 101, that is, the protection drive circuit 100 and the first output of the power supply module 101 The path between the terminals continues to be conductive. When an abnormality occurs in the fuel gauge chip 10, the central processor 11 sends a control signal to the fuel gauge chip 10, and the control circuit 102 cuts off the second output terminal of the fuel gauge chip 10 according to the instructions of the control signal. The connection path between the control circuits 102, or the connection path between the control circuit 102 and the functional component 103, and then the central processor 11 sends a control signal to re-power on the fuel gauge chip 10 and reset it without turning off the protection drive circuit 100, After the fuel gauge chip 10 receives the control signal, the control circuit 102 re-runs the program according to the instructions of the control signal. When the fuel gauge chip 10 loses power and is reset, the protection drive circuit 100 still does not lose power and shut down, preventing the entire machine from being shut down. The terminal (central processing unit) is directly shut down due to the fuel gauge chip 10 being reset again.

Among them, the central processor 11 can monitor the status data of the fuel gauge chip 10 to determine whether the fuel gauge chip 10 is abnormal. Specifically, the central processor 11 is provided with an I2C interface, and the fuel gauge chip 10 is provided with an I2C interface. The central processor 11 It can communicate with the fuel gauge chip 10 through the I2C bus. The status data of the fuel gauge chip 10 includes I2C communication status data, such as the I2C communication response signal to monitor whether there is a communication failure between the central processor 11 and the fuel gauge chip 10. abnormality; the status data of the fuel gauge chip 10 also includes: fuel gauge parameters, the fuel gauge parameters include but are not limited to the register status data of the fuel gauge chip 10, the working mode data of the fuel gauge chip 10, battery voltage, Current and battery temperature, as well as at least one of the parameters of each functional component 103 in the fuel gauge chip 10 , the register status data includes the current state of the register to determine whether there is an abnormality of memory flip, and the working mode data includes the current state of the fuel gauge chip 10 The working mode of the fuel gauge chip 10 is used to determine whether there is an abnormal working mode problem of the fuel gauge chip 10. The battery voltage, current and battery temperature are used to determine whether the battery is abnormal. The parameters of each functional component 103 of the fuel gauge can be used to determine whether the fuel gauge chip 10 exists. The firmware is locked and does not execute.

In a possible implementation, the fuel gauge chip 10 is provided with a reset interface, the central processing unit is provided with an input and output interface, the reset interface is connected to the input and output interface, and the control signal is transmitted through the reset interface and the input and output interface.

Specifically, a reset interface is provided on the fuel gauge chip 10, a control circuit 102 is provided inside the fuel gauge chip 10, and an input and output interface (I/O pin) is provided on the central processor 11. The central processor 11 inputs The output interface and the reset interface send control signals to the fuel gauge chip 10 , and the control circuit 102 in the fuel gauge chip 10 controls each functional component 103 in the fuel gauge chip 10 according to the instructions of the control signal.

In a possible implementation, the control signal includes a first control signal and a second control signal. When the status data of the fuel gauge chip 10 is abnormal, the central processor 11 sends the first control signal to the fuel gauge chip 10, The control circuit 102 controls the functional components 103 in the fuel gauge chip 10 to lose power according to the instructions of the first control signal. The central processor 11 sends a second control signal to the fuel gauge chip 10. The control circuit 102 controls the power quantity according to the instructions of the second control signal. The functional components 103 that lose power in the meter chip 10 are powered on and reset.

Specifically, the first control signal is a signal instructing the functional component 103 in the fuel gauge chip 10 to lose power, and the second control signal is a signal instructing the functional component 103 in the fuel gauge chip 10 to lose power to be powered on and reset. The central processing unit 11 sends a first control signal to the fuel gauge chip 10, and the control circuit 102 cuts off the connection path between the second output end of the fuel gauge chip 10 and the control circuit 102 according to the instructions of the first control signal, that is, controls the fuel gauge chip. The second output end of the power supply module 101 of 10 is closed, or the connection path between the control circuit 102 and the functional component 103 is lowered, or the input and output interface 110 of the central processor 11 is lowered to a low level, so that the fuel gauge chip 10 The functional component 103 loses power, and then the central processor 11 sends a second control signal to power on and reset the functional component 103 in the fuel gauge chip 10 that loses power. Therefore, when the fuel gauge chip 10 is powered off and reset, the protection drive circuit 100 will still not be shut down due to power loss, preventing the entire machine (such as the central processor 11) from shutting down directly due to the fuel gauge chip 10 being reset again, thus improving the This improves the reliability of the fuel gauge chip 10 and improves user experience.

For the central processor 11, if a high-level signal is directly output to the reset interface 104 of the fuel gauge chip 10 to reset the fuel gauge chip 10, there may be the following two risks. One: if the DSG switch of the battery metering chip is turned off. action, when the power supply voltage of the host is lower than its minimum operating voltage, the input and output interface 110 of the host cannot guarantee a certain output low level, which may cause the fuel gauge chip 10 to be in a reset state all the time, causing overcharge protection to fail. There is a safety risk, and every time the DSG switch is turned off, the fuel gauge chip 10 may be reset; secondly, when the host-side central processor 11 is damaged or the host-side central processor 11 program runs away, other The level signal output to the battery metering chip may always be high, causing the fuel meter chip 10 to always be in a reset state, causing the battery to be overcharged and unable to be protected. There is a risk of the battery being charged and exploded, posing a safety hazard.

In a possible implementation manner, to address the above problems, the control signal provided by the embodiment of the present application is a level sequence composed of at least one high-level signal and at least one low-level signal.

Specifically, a high-level signal or a low-level signal can last for a preset time. In this way, at least a level sequence composed of a high-level signal and a low-level signal is a certain time level sequence. The control signal can be defined as Xms high level + Yms low level + Zms high level. The level sequence of various control signals is shown in Figure 3. Among them, X, Y and Z can take any values. This application implements For example, there is no limit here, for example, X takes a value of 100ms, Y takes a value of 200ms, and Z takes a value of 100ms. In addition, the above-mentioned first control signal and second control signal may adopt different level sequences to achieve different functions.

It is worth noting that the level sequence can also be other combinations, which are not limited in the embodiments of the present application.

In this way, through a certain time level sequence, the problem of false triggering caused by a simple high-level signal is effectively avoided, potential safety hazards are eliminated, and the reliability of the battery metering system is further improved.

In one possible implementation, the power supply module 101 is used to continuously supply power to the protection driving circuit 100, and the protection driving circuit 100 is used to drive the NMOS switch connected to the central processing unit to disconnect when the central processing unit 11 is abnormal.

Specifically, the power supply module 101 continuously supplies power to the protection driving circuit 100. Therefore, when an abnormality occurs in the fuel gauge chip, the protection driving circuit 100 will not lose power. When an abnormal situation such as overcurrent or overvoltage occurs in the central processing unit 11, the protection driving circuit 100 can drive the N MOS switch connected to the central processing unit to disconnect, thereby disconnecting the power supply path of the central processing unit, regardless of the state of the fuel gauge chip. The abnormal state is still a normal state. Since the power supply module 101 continues to supply power to the protection drive circuit 100, Therefore, the protection driving circuit 100 is still in a normal working state and drives the NMOS switch to turn off when the CPU 11 is abnormal. In this way, the reliability of the protection drive circuit is higher and the safety performance of the entire battery metering system is improved.

Through the technical solutions disclosed in the embodiments of this application, the remaining functional components in the fuel gauge chip except the protection drive circuit are controlled by the control circuit to lose power and reset according to the instructions of the central processor, while the protection drive circuit is controlled by the power supply module Direct power supply, when the functional components in the fuel gauge chip lose power and are reset, the protection drive circuit is always powered and will not be shut down, which will not cause the entire electronic device to be powered off, improving the reliability of the battery metering system. Reliability and improved user experience.

As shown in FIG. 4 , a schematic structural diagram of an electronic device provided by an embodiment of the present application is shown, including a fuel gauge chip 10 , a central processing unit 11 and a battery 12 . As shown in FIG. 2 above, the fuel gauge chip 10 includes Protection drive circuit 100, power supply module 101, control circuit 102 and functional component 103, the output end of the battery is connected to the input end of the power supply module, the first output end of the power supply module 101 is connected to the protection drive circuit 100, for To supply power to the protection drive circuit 100, the second output end of the power supply module 101 is connected to one end of the control circuit 102, the other end of the control circuit 102 is connected to the functional component 103, and the central processing unit 11 is connected to the fuel gauge chip 10 for supplying power to the protection drive circuit 100. The meter chip 10 sends a control signal to the control circuit 102, which is used to control the functional component 103 to lose power and reset according to the instructions of the control signal.

Specifically, the fuel gauge chip is provided with a reset interface, and the central processor is provided with an input and output interface; the reset interface is connected to the input and output interface, and the control signal passes through the reset interface and the input and output interface. transmission.

As shown in Figure 5, a reset interface 104 (por pin) is provided on the fuel gauge chip 10, a control circuit 102 is provided inside the fuel gauge chip 10, and an input and output interface 110 (I /O pin), the central processing unit 11 sends a control signal to the fuel gauge chip 10 through the input and output interface 110 and the reset interface 104. The control circuit 102 in the fuel gauge chip 10 controls each of the components in the fuel gauge chip 10 according to the instructions of the control signal. Functional component 103 performs control.

Among them, the power supply pin (VDD pin) and voltage acquisition pin (VBAT pin) of the fuel gauge chip 10 are connected to the positive electrode of the battery, and the charge drive switch (CHG switch) and discharge switch of the protection drive circuit 100 of the fuel gauge chip 10 The drive switch (DSG switch) is connected between the battery and the central processor 11, the common connection pin (VSS pin) of the fuel gauge chip 10 is connected to the negative pole of the battery, and the current sampling pin (SRN pin) of the fuel gauge chip 10 ) and the SRP pin are connected between the negative electrode of the battery and the central processor 11. The I2C interface of the fuel gauge chip 10 is connected to the I2C interface of the central processor 11. The power The reset interface 104 of the computer chip 10 is connected to the input and output interface 110 of the central processing unit 11 . Among them, the VDD pin represents the internal working voltage of the fuel gauge chip 10, and the VBAT pin represents that when the VDD pin is powered off, the contents of the register inside the backup fuel gauge chip 10 can be saved and the real-time clock (RTC) can be maintained. ) function, VSS means public connection, which refers to the voltage of the common ground terminal of the circuit, the CHG switch is used to turn on and off the charging switch tube in the protection drive circuit 100 in the fuel gauge chip 10, and the DSG switch means to switch on and off the charge switch tube in the fuel gauge chip 10 To protect the on and off of the discharge switch tube in the drive circuit 100, the SRN pin is the negative terminal of the input control signal, and the SRP is the positive terminal of the input control signal. The TEMP interface is used to monitor the temperature of the battery. When the temperature of the battery is too high or too low, it will Stop charging.

For the central processor 11, if a high-level signal is directly output to the reset interface 104 of the fuel gauge chip 10 to reset the fuel gauge chip 10, there may be the following two risks. One: if the DSG switch of the battery metering chip is turned off. action, when the power supply voltage of the host is lower than its minimum operating voltage, the input and output interface 110 of the host cannot guarantee a certain output low level, which may cause the fuel gauge chip 10 to be in a reset state all the time, causing overcharge protection to fail. There is a safety risk, and every time the DSG switch is turned off, the fuel gauge chip 10 may be reset; Secondly, when the host-side central processor 11 is damaged or the host-side central processor 11 program runs away, the level signal it outputs to the battery metering chip may always be high, causing the fuel meter chip 10 to be in a reset state all the time, causing the battery to fail. If the battery is overcharged and cannot be protected, there is a risk of the battery exploding, posing a safety hazard.

In a possible implementation, the central processing unit is connected to the battery through an NMOS switch, the power supply module is used to continuously supply power to the protection driving circuit, and the protection driving circuit is used to operate the central processing unit when the central processing unit When abnormal, the NMOS switch connected to the central processing unit is disconnected.

Specifically, the power supply module 101 continuously supplies power to the protection driving circuit 100. Therefore, when an abnormality occurs in the fuel gauge chip, the protection driving circuit 100 will not lose power. When the central processor 11 encounters an abnormal situation such as overcurrent or overvoltage, the protection drive circuit 100 can drive the NMOS switch connected to the central processor to disconnect, thereby disconnecting the power supply path between the battery and the central processor, regardless of the fuel gauge chip. Whether in an abnormal state or a normal state, since the power supply module 101 continues to supply power to the protection drive circuit 100, the protection drive circuit 100 is still in a normal working state, and drives the NMOS switch to open when the central processor 11 is abnormal, thereby cutting off the battery. and the central processing unit 11. In this way, the reliability of the protection drive circuit is higher and the safety performance of the entire battery metering system is improved.

As shown in Figure 6, the embodiment of the present application provides a control method for a battery metering system, which should For electronic equipment, that is to say, it can be executed by hardware or software of the electronic equipment, the control method includes the following steps:

Step S601: Obtain status data of the fuel gauge chip.

Wherein, the protection driving circuit is connected to the first output end of the power supply module of the fuel gauge chip, and the power supply module is used to continuously supply power to the protection driving circuit.

Specifically, the fuel gauge chip communicates with the central processor through the I2C bus. The status data of the fuel gauge chip includes the I2C communication status data of the fuel gauge chip and the central processor, the register status data of the fuel gauge chip and the working mode of the fuel gauge chip. At least one of the data.

Further, the status data of the fuel gauge chip includes I2C communication status data, such as the I2C communication response signal to monitor whether there is an abnormal communication hangup between the central processor and the fuel gauge chip; the status data of the fuel gauge chip also includes: fuel gauge Parameters, fuel gauge parameters include but are not limited to register status data of the fuel gauge chip, working mode data of the fuel gauge chip, battery voltage, current and battery temperature, and at least one of the parameters of each functional component in the fuel gauge chip, register status data Including the current state of the register to determine whether there is an abnormality in memory flipping. The working mode data includes the current working mode of the fuel gauge chip to determine whether there is an abnormal working mode problem in the fuel gauge chip. Through the battery voltage, current and battery temperature In order to determine whether there is an abnormality in the battery, each functional component parameter of the fuel gauge can be used to determine whether there is an abnormality in the firmware of the fuel gauge chip that is locked and does not execute.

Step S603: When the status data is abnormal, send a control signal to the fuel gauge chip.

Specifically, when an abnormality occurs in the fuel gauge chip, the central processor sends a control signal to the fuel gauge chip. The control signal includes a first control signal and a second control signal. The first control signal indicates that a functional component in the fuel gauge chip has failed. The second control signal is an electrical signal, and the second control signal is for instructing the power-off functional components in the fuel gauge chip to be powered on and reset again.

Step S605: Use the control circuit of the fuel gauge chip to control the functional components in the fuel gauge chip except the protection drive circuit to lose power and reset according to the instructions of the control signal.

Wherein, the protection driving circuit is connected to the first output end of the power supply module of the fuel gauge chip, and the power supply module is used to continuously supply power to the protection driving circuit. Specifically, as mentioned above, the fuel gauge chip includes but is not limited to protection drive circuit, power supply module, control circuit and functional components. Among them, functional components include but are not limited to system clock, processor, memory, communication module, coulomb counter and composite ADC; the first output end of the power supply module is connected to the protection drive circuit for supplying power to the protection drive circuit, the second output end of the power supply module is connected to one end of the control circuit, and the other end of the control circuit Connected to the functional components, the central processing unit is connected to the fuel gauge chip and used to send control signals to the fuel gauge chip; the control circuit is used to control the functional components to lose power and reset according to the instructions of the control signal.

Furthermore, the control circuit cuts off the connection path between the second output terminal of the fuel gauge chip and the control circuit, or the connection path between the control circuit and the functional component according to the instruction of the control signal, and then the central processor sends the control signal to let the power The meter chip is powered on and reset without turning off the protection drive circuit. After the fuel meter chip receives the control signal, the control circuit re-runs the program according to the instructions of the control signal. When the fuel meter chip is powered off and reset, the drive circuit is protected. It will still not shut down due to power loss, preventing the entire machine (central processing unit) from shutting down directly due to the resetting of the fuel gauge chip.

Through the technical solutions disclosed in the embodiments of the present application, when the status data of the fuel gauge chip is abnormal, the remaining functional components in the fuel gauge chip except the protection drive circuit are controlled by the control circuit to lose power according to the instructions of the central processor. And reset, and the protection drive circuit is directly powered by the power supply module. When the functional components in the fuel gauge chip lose power and are reset, the protection drive circuit is always powered and will not shut down, which will not cause damage to the electronic equipment. The entire machine is powered off, which improves the reliability of the battery metering system and improves the user experience.

In a possible implementation, step S605 includes: when the control signal is a valid control signal, controlling the functional components in the fuel gauge chip except the protection drive circuit to lose power and reset through the control circuit; the valid control signal includes at least A level sequence consisting of a high-level signal and at least one low-level signal.

Specifically, a high-level signal or a low-level signal in the effective control signal can last for a preset time. In this way, the level sequence composed of at least one high-level signal and a low-level signal is a certain time level sequence. The control signal can be defined as Xms high level + Yms low level + Zms high level. The level sequence of various control signals is shown in Figure 3. Among them, X, Y and Z can take any values. This application implements For example, there is no limit here, for example, X takes a value of 100ms, Y takes a value of 200ms, and Z takes a value of 100ms. In addition, the above-mentioned first control signal and second control signal may adopt different level sequences to achieve different functions.

In a possible implementation, step S405 includes: sending a first control signal to the fuel gauge chip, and controlling the functional components in the fuel gauge chip through the control circuit according to the instructions of the first control signal. Loss of power; sending a second control signal to the fuel gauge chip, and controlling the power-on reset of the functional components of the fuel gauge chip that lose power according to the instructions of the second control signal through the control circuit.

Specifically, the control signal includes a first control signal and a second control signal. The central processor sends the first control signal to the fuel gauge chip, and the control circuit cuts off the second output terminal of the fuel gauge chip and the control circuit according to the instructions of the first control signal. The connection path between the circuits, that is, the control circuit controls the second output end of the power supply module in the fuel gauge chip to close according to the instructions of the first control signal, or controls the connection path between the circuit and the functional component, or pulls down the central processing unit The input and output interface of the device is at a low level, causing the functional components in the fuel gauge chip to lose power, and then the central processor sends a second control signal to power on and reset the functional components in the fuel gauge chip that have lost power. Therefore, when the fuel gauge chip is powered off and reset, the protection drive circuit will still not shut down due to loss of power, preventing the entire machine (such as the central processor) from shutting down directly due to the fuel gauge chip being reset again, thus improving the efficiency of the fuel gauge chip. The reliability improves the user experience.

It should be noted that, in this document, the terms "comprising", "comprises" or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, It also includes other elements not expressly listed or inherent in the process, method, article or apparatus. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article or apparatus that includes that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions may be performed, for example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation. Based on this understanding, the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to the existing technology. The computer software product is stored in a storage medium (such as ROM/RAM, disk , CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods of various embodiments of the present application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above. The above-described specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art, inspired by this application, can do so without departing from the purpose of this application and the scope protected by the claims. , many forms can also be made, all of which fall within the protection of this application.

Claims

A battery metering system including:

A fuel gauge chip, which includes a protection drive circuit, a power supply module, a control circuit and functional components;

The first output end of the power supply module is connected to the protection driving circuit and is used to supply power to the protection driving circuit;

The second output end of the power supply module is connected to one end of the control circuit, and the other end of the control circuit is connected to the functional component;

Central processor, the central processor is connected to the fuel gauge chip and used to send control signals to the fuel gauge chip;

The control circuit is used to control the functional component to lose power and reset according to the instructions of the control signal.
The battery metering system according to claim 1, wherein the fuel gauge chip is provided with a reset interface, and the central processor is provided with an input and output interface;

The reset interface is connected to the input and output interface, and the control signal is transmitted through the reset interface and the input and output interface.
The battery metering system according to claim 1, wherein the control signal includes a first control signal and a second control signal, and when the status data of the fuel gauge chip is abnormal, the central processor sends a signal to the battery meter chip. The fuel gauge chip sends a first control signal, and the control circuit controls the functional components in the fuel gauge chip to lose power according to the instructions of the first control signal;

The central processor sends a second control signal to the fuel gauge chip, and the control circuit controls the power-on reset of the power-off functional components in the fuel gauge chip according to the instructions of the second control signal.
The battery metering system according to claim 1, wherein the control signal is a level sequence composed of at least one high-level signal and at least one low-level signal.
The battery metering system according to claim 1, wherein the power supply module is used to continuously supply power to the protection driving circuit, and the protection driving circuit is used to drive the communication with the central processing unit when the central processing unit is abnormal. The NMOS switch tube connected to the controller is disconnected.
An electronic device, including: battery, fuel gauge chip and central processing unit,

The fuel gauge chip includes a protection drive circuit, a power supply module, a control circuit and functional components;

The output end of the battery is connected to the input end of the power supply module and the central processor respectively, and the first output end of the power supply module is connected to the protection drive circuit for supplying power to the protection drive circuit;

The second output end of the power supply module is connected to one end of the control circuit, and the other end of the control circuit is connected to the functional component;

The central processing unit is connected to the fuel gauge chip and is used to send control signals to the fuel gauge chip;

The control circuit is used to control the functional component to lose power and reset according to the instructions of the control signal.
The electronic device according to claim 6, wherein the fuel gauge chip is provided with a reset interface, and the central processing unit is provided with an input and output interface;

The reset interface is connected to the input and output interface, and the control signal is transmitted through the reset interface and the input and output interface.
The electronic device according to claim 6, wherein the control signal includes a first control signal and a second control signal, and when the status data of the fuel gauge chip is abnormal, the central processor sends a signal to the power meter chip. The meter chip sends a first control signal, and the control circuit controls the functional components in the fuel meter chip to lose power according to the instructions of the first control signal;

The central processor sends a second control signal to the fuel gauge chip, and the control circuit controls the power-on reset of the power-off functional components in the fuel gauge chip according to the instructions of the second control signal.
The electronic device according to claim 6, wherein the control signal is a level sequence composed of at least one high-level signal and at least one low-level signal.
The electronic device according to claim 6, wherein the central processor is connected to the battery through an NMOS switch, the power supply module is used to continuously supply power to the protection drive circuit, and the protection drive circuit is used to When the central processor is abnormal, the NMOS switch connected to the central processor is driven to disconnect.
A control method for a battery metering system, including:

Get the status data of the fuel gauge chip;

When the status data is abnormal, send a control signal to the fuel gauge chip;

The control circuit of the fuel gauge chip controls the functional components of the fuel gauge chip except the protection drive circuit to lose power and reset according to the instructions of the control signal;

Wherein, the protection driving circuit is connected to the first output end of the power supply module of the fuel gauge chip, and the power supply module is used to continuously supply power to the protection driving circuit.
The control method of a battery metering system according to claim 11, wherein the controlling the functional components of the fuel gauge chip except the protection drive circuit to lose power and reset through the control circuit of the fuel gauge chip includes:

When the control signal is a valid control signal, the control circuit controls the functional components in the fuel gauge chip except the protection drive circuit to lose power and reset;

The effective control signal includes a level sequence composed of at least one high-level signal and at least one low-level signal.
The control method of a battery metering system according to claim 11, wherein the controlling the functional components in the fuel gauge chip except the protection drive circuit to lose power and reset through the control circuit of the fuel gauge chip includes:

Send a first control signal to the fuel gauge chip, and use the control circuit to control the functional components in the fuel gauge chip to lose power according to the instructions of the first control signal;

A second control signal is sent to the fuel gauge chip, and the control circuit controls the power-on reset of the power-off functional components in the fuel gauge chip according to the instructions of the second control signal.