CN116054301A - A battery protection device, battery protection method and electronic equipment - Google Patents

Abstract

The application provides a battery protection device, a battery protection method and electronic equipment, and relates to the technical field of terminals. This battery protection device sets up in electronic equipment, electronic equipment's battery include the electric core with battery protection shield, battery protection device includes: a main control chip and a logic chip; the logic chip is electrically connected with the main control chip; the logic chip is positioned on the battery protection board; the logic chip is used for storing first identification information; the main control chip is used for storing second identification information, reading the first identification information stored by the logic chip, and controlling the electronic equipment to charge the battery according to a normal charging mode when the first identification information is matched with the second identification information; and when the first identification information is not matched with the second identification information or the first identification information is not read, controlling the electronic equipment to reduce the charging power of the battery. By adopting the scheme, the hardware cost can be reduced on the premise of ensuring the safety of battery charging.

Description

A battery protection device, battery protection method and electronic equipment

technical field

The present application relates to the field of terminal technologies, and in particular to a battery protection device, a battery protection method, and electronic equipment.

Background technique

With the advancement of battery charging technology, the application of high-power charging on electronic devices is becoming more and more extensive. In addition, the rated capacity of batteries used in electronic devices is also increasing day by day.

At present, there are differences in the high-power charging technologies of different equipment manufacturers, and the charging power of the battery is also different. In order to avoid safety accidents caused by the use of non-standard batteries or inferior batteries in electronic equipment, resulting in charging power exceeding the battery’s own charging specifications, an encrypted anti-counterfeiting integrated circuit (IC) is generally used to achieve battery safety protection. When the encrypted anti-counterfeiting IC finds that the current battery of the electronic device is a non-standard battery, it can reduce the charging current of the electronic device to the battery to reduce potential safety hazards.

However, currently used encryption anti-counterfeiting ICs require built-in encryption algorithms, resulting in complex design of encryption anti-counterfeiting ICs and high hardware costs.

Contents of the invention

In order to solve the above problems, the present application provides a battery protection device, a battery protection method and an electronic device, which can reduce hardware costs on the premise of ensuring battery charging safety.

In a first aspect, the present application provides a battery protection device. The battery protection device is set on an electronic device, the electronic device includes a battery protection board, and the battery protection device includes a main control chip and a logic chip. Wherein, the logic chip is electrically connected to the main control chip, and the logic chip is located on the battery protection board; the logic chip is used to store the first identification information; the main control chip is used to store the second identification information, and read the logic The first identification information stored in the chip, when the first identification information matches the second identification information, control the electronic device to charge the battery according to the normal charging mode; when the first identification information When the second identification information does not match or the first identification information is not read, the electronic device is controlled to reduce the charging power of the battery.

The battery protection device uses an ordinary logic chip, and uses the readable and writable registers of the logic chip to store the matching relationship between the electronic device and the battery on the logic chip, and also stores the matching relationship on the main control chip. By comparing the two matching relationship, you can determine whether the battery has been replaced. This solution does not require a built-in encryption algorithm on the logic chip, and has low requirements on the logic chip. Therefore, it can reduce hardware costs while ensuring battery charging safety, and has high practicability.

In a possible implementation manner, the main control chip is specifically configured to: when the first identification information matches the second identification information, according to the current time, the identification code of the electronic device, and the the identification code of the battery, generate updated first identification information and updated second identification information, store the updated second identification information and write the updated first identification information into the logic chip . At this time, after each charging, the first identification information and the second identification information are updated, that is, the first identification information and the second identification information are not fixed, which improves the security of information.

In a possible implementation manner, the identification code of the electronic device is a product serial code of the electronic device, and the identification code of the battery is a product serial code of the battery.

In a possible implementation manner, the main control chip is arranged on the main board of the electronic device; the ground terminal of the logic chip is used for grounding through the main board; the ground terminal of the logic chip should be connected to the main board When the connection is disconnected, the stored first identification information is cleared, so that the first identification information is empty data. That is, when the battery is replaced, since the logic chip is located on the battery protection board, the logic chip also needs to be replaced, and the ground terminal of the logic chip is disconnected from the main board, causing the first protection information on the logic chip to be cleared . So that it can be determined according to the first protection information whether the battery has been replaced or abnormal power failure occurs.

In a possible implementation manner, the main control chip is specifically configured to: when the read first identification information is inconsistent with the second identification information, or when the first identification information is not read , and when the voltage of the battery is greater than the first voltage value, the electronic device is controlled to charge the battery according to the lowest charging power supported by the electronic device.

When the read first identification information is inconsistent with the second identification information, the first identification information is not empty data at this time, indicating that the following situation may occur at this time: the battery has been replaced, but the replaced battery The logic chip described in this application is provided, but because the identification codes of the batteries are different, although the electrical connection between the logic chip and the main control chip is normal, the first identification information stored on the logic chip is different from the first identification information stored on the main control chip. The second identification information is inconsistent.

When the first identification information is not read and the voltage of the battery is greater than the first voltage value, it indicates that the battery is not over-discharged at this time, and the battery may be replaced.

In order to avoid potential safety hazards, the main control chip controls the charging management module of the electronic device to charge the battery according to the lowest charging power.

In a possible implementation manner, the main control chip is further configured to control the electronic device to charge the battery according to the lowest charging power supported by the electronic device when the electrical connection with the logic chip is disconnected. to charge.

In a possible implementation manner, the main control chip is specifically configured to: when the first identification information is not read and the voltage of the battery starts charging is less than the first voltage value, and the voltage of the battery is determined by When the time taken for the second voltage value to drop to the first voltage value is longer than the preset time, the electronic device is controlled to charge the battery according to the derating charging mode, and the charging power of the derating charging mode is lower than the normal charging The charging power of the mode is higher than the minimum charging power supported by the electronic device, and the second voltage value is greater than the first voltage value.

At this time, the battery of the electronic device has not been replaced, but the first identification information cannot be read due to over-discharge. The charging power of the derating charging mode can be set to be slightly lower than that of the normal charging mode.

In a possible implementation manner, the main control chip is further configured to control the electronic device according to The derating charging mode charges the battery.

At this time, the following situations may occur: the battery of the electronic device has not been replaced, but due to accidental drop or collision, or short-term disassembly during maintenance, the logic chip is powered off, and the first identification information stored on the logic chip is cleared , and then the logic chip is powered on normally, and the normal connection with the main control chip is restored.

In a possible implementation, the main control chip also includes a data interface; the data interface is used to connect external devices; the main control chip is also used to authenticate the external device, when the authentication passes Then, under the control of the external device, store the updated second identification information, and write the updated first identification information into the logic chip.

When connecting external devices on the production line, the identification information stored on the main control chip and logic chip can be initialized; when the maintenance point is connected to external devices, the data stored on the logic chip can be updated through the main control chip, and also That is, when the battery of an electronic device needs to be replaced, first replace the standard battery, obtain the identification code of the new battery, that is, the device serial number of the new battery, and then update the corresponding identification information on the main control chip and logic chip through the data interface.

In a second aspect, the present application also provides a battery protection method, which is applied to a main control chip, and the main control chip stores second identification information, and the method includes: reading the first identification information stored in the logic chip, the The logic chip is electrically connected to the main control chip, and the logic chip is located on the battery protection board; when the first identification information matches the second identification information, control the electronic device to charge the electronic device according to the normal charging mode. The battery is charged; when the first identification information does not match the second identification information or the first identification information is not read, the electronic device is controlled to reduce the charging power of the battery.

With this method, by storing the matching relationship between the electronic device and the battery on the logic chip, and also storing the matching relationship on the main control chip, by comparing the two matching relationships, it can be determined whether the battery has been replaced. The method does not need to build an encryption algorithm on the logic chip, and has low requirements on the logic chip, so it can reduce hardware costs under the premise of ensuring battery charging safety, and has high practicability.

In a possible implementation manner, when the first identification information matches the second identification information, controlling the electronic device to charge the battery according to a normal charging mode specifically includes:

When the first identification information matches the second identification information, generate updated first identification information and updated first identification information according to the current time, the identification code of the electronic device, and the identification code of the battery. 2. Identification information;

storing the updated second identification information and writing the updated first identification information into the logic chip;

And control the electronic device to charge the battery according to the normal charging mode.

In a possible implementation manner, the identification code of the electronic device is a product serial code of the electronic device, and the identification code of the battery is a product serial code of the battery.

In a possible implementation manner, the main control chip is arranged on the main board of the electronic device; the ground terminal of the logic chip is grounded through the main board; when the ground terminal of the logic chip is disconnected from the main board, , clearing the stored first identification information.

In a possible implementation manner, when the first identification information does not match the second identification information or the first identification information is not read, the electronic device is controlled to lower the power consumption of the battery. charging power, including:

When the read first identification information is inconsistent with the second identification information, or when the first identification information is not read and the voltage of the battery is greater than the first voltage value, control the The electronic device charges the battery according to the lowest charging power supported by the electronic device.

In a possible implementation, the method further includes:

When the electrical connection with the logic chip is disconnected, the electronic device is controlled to charge the battery according to the lowest charging power supported by the electronic device.

In a possible implementation manner, when the first identification information does not match the second identification information or the first identification information is not read, the electronic device is controlled to lower the power consumption of the battery. charging power, including:

When the first identification information is not read, and the voltage of the battery when charging starts is less than the first voltage value, and the time taken for the voltage of the battery to drop from the second voltage value to the first voltage value is longer than a preset time , control the electronic device to charge the battery according to the derating charging mode, the charging power of the derating charging mode is lower than the charging power of the normal charging mode, and higher than the minimum charging power supported by the electronic device , the second voltage value is greater than the first voltage value.

In a possible implementation, the method further includes:

When the electrical connection with the logic chip is normal, but the read first identification information is empty data, control the electronic device to charge the battery according to the derating charging mode.

In a possible implementation, the method further includes: connecting to an external device through a data interface, and authenticating the external device; after the authentication is passed, under the control of the external device, storing the updated and write the updated first identification information into the logic chip.

In a third aspect, the present application further provides an electronic device, the electronic device includes the battery protection device provided in the above implementation manner, and further includes a battery cell. The battery cell and the battery protection plate are packaged together to form a battery. Batteries are used to power electronic devices. The main control chip of the battery protection device can be integrated on the main board of the electronic equipment. The main control chip and logic chip are powered by batteries.

The electronic equipment uses a battery protection device. The battery protection device uses an ordinary logic chip, and uses the readable and writable registers of the logic chip to store the matching relationship between the electronic equipment and the battery on the logic chip, and also stores it on the main control chip. For the matching relationship, by comparing the two matching relationships, it can be determined whether the battery has been replaced. This solution does not require a built-in encryption algorithm on the logic chip, and has low requirements on the logic chip. The main control chip can directly multiplex the processor on the electronic device, so it can reduce the hardware cost of the electronic device while ensuring the safety of battery charging. , has high practicability. In addition, the battery protection device can also distinguish the battery over-discharge, the battery has not been replaced but the main control chip and the logic chip have a communication failure, the battery has not been replaced but the power is lost for a short time, etc., so as to adopt the corresponding charging mode, with high Practicality further improves the safety of electronic equipment and reduces the risk of accidents.

Description of drawings

FIG. 1 is a schematic structural diagram of an electronic device;

Fig. 2 is a schematic diagram of a charging stage;

FIG. 3 is a schematic diagram of a battery protection device provided by an embodiment of the present application;

Fig. 4 is a schematic diagram of another battery protection device provided by the embodiment of the present application;

FIG. 5 is a flow chart of a battery protection method provided by an embodiment of the present application;

FIG. 6 is a flow chart of another battery protection method provided by the embodiment of the present application;

FIG. 7 is a schematic diagram of an electronic device provided by an embodiment of the present application.

Detailed ways

In order to enable those skilled in the art to understand the solution of the present application more clearly, the application scenarios of the technical solution of the present application are first described below.

The technical solutions provided by this application can be applied to electronic devices, and the electronic devices can be mobile phones, wearable electronic devices (such as smart watches), tablet computers, augmented reality (augmented reality, AR) devices, virtual reality (virtual reality, VR) devices etc., which are not specifically limited in the embodiments of the present application.

Referring to FIG. 1 , this figure is a schematic structural diagram of an electronic device.

The electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (universal serial bus, USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, and an antenna 2 , mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, earphone jack 170D, sensor module 180, button 190, motor 191, indicator 192, camera 193, display screen 194, and A subscriber identification module (subscriber identification module, SIM) card interface 195 and the like. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, bone conduction sensor 180M, etc.

It can be understood that, the structure illustrated in the embodiment of the present invention does not constitute a specific limitation on the electronic device 100 . In other embodiments of the present application, the electronic device 100 may include more or fewer components than shown in the figure, or combine certain components, or separate certain components, or arrange different components. The illustrated components can be realized in hardware, software or a combination of software and hardware.

The processor 110 may include one or more processing units, for example: the processor 110 may include an application processor (application processor, AP), a modem processor, a graphics processing unit (graphics processing unit, GPU), an image signal processor ( image signal processor (ISP), controller, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural network processor (neural-network processing unit, NPU), etc. Wherein, different processing units may be independent devices, or may be integrated in one or more processors.

The controller can generate an operation control signal according to the instruction opcode and timing signal, and complete the control of fetching and executing the instruction.

A memory may also be provided in the processor 110 for storing instructions and data. In some embodiments, the memory in processor 110 is a cache memory. The memory may hold instructions or data that the processor 110 has just used or recycled. If the processor 110 needs to use the instruction or data again, it can be called directly from the memory. Repeated access is avoided, and the waiting time of the processor 110 is reduced, thus improving the efficiency of the system.

The external memory interface 120 can be used to connect an external memory card, such as a Micro SD card, so as to expand the storage capacity of the electronic device 100. The external memory card communicates with the processor 110 through the external memory interface 120 to implement a data storage function. Such as saving music, video and other files in the external memory card.

The internal memory 121 may be used to store computer-executable program codes including instructions. The internal memory 121 may include an area for storing programs and an area for storing data. Wherein, the stored program area can store an operating system, at least one application program required by a function (such as a sound playing function, an image playing function, etc.) and the like. The storage data area can store data created during the use of the electronic device 100 (such as audio data, phonebook, etc.) and the like. In addition, the internal memory 121 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, universal flash storage (universal flash storage, UFS) and the like. The processor 110 executes various functional applications and data processing of the electronic device 100 by executing instructions stored in the internal memory 121 and/or instructions stored in a memory provided in the processor.

The USB interface 130 is an interface conforming to the USB standard specification, specifically, it can be a Mini USB interface, a Micro USB interface, a USB Type C interface, and the like. The USB interface 130 can be used to connect a charger to charge the electronic device 100 , and can also be used to transmit data between the electronic device 100 and peripheral devices. It can also be used to connect headphones and play audio through them. This interface can also be used to connect other electronic devices, such as AR devices.

It can be understood that the interface connection relationship between the modules shown in the embodiment of the present invention is only a schematic illustration, and does not constitute a structural limitation of the electronic device 100 . In other embodiments of the present application, the electronic device 100 may also adopt different interface connection manners in the foregoing embodiments, or a combination of multiple interface connection manners.

The charging management module 140 is configured to receive a charging input from a charger. Wherein, the charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 140 can receive charging input from the wired charger through the USB interface 130 . In some wireless charging embodiments, the charging management module 140 may receive a wireless charging input through a wireless charging coil of the electronic device 100 . While the charging management module 140 is charging the battery 142 , it can also supply power to the electronic device through the power management module 141 .

The power management module 141 is used for connecting the battery 142 , the charging management module 140 and the processor 110 . The power management module 141 receives the input from the battery 142 and/or the charging management module 140 to provide power for the processor 110 , the internal memory 121 , the display screen 194 , the camera 193 , and the wireless communication module 160 . The power management module 141 can also be used to monitor parameters such as battery capacity, battery cycle times, and battery health status (leakage, impedance). In some other embodiments, the power management module 141 may also be disposed in the processor 110 . In some other embodiments, the power management module 141 and the charging management module 140 may also be set in the same device.

Referring to Fig. 2, this figure is a schematic diagram of a charging stage.

When a standard battery is used on the electronic device 20 , it will be described by taking the electronic device 20 supporting DC fast charging, that is, high-power charging as an example. At this time, the charging phase of the electronic device 20 can be divided into a trickle charging phase, a constant current charging phase, a constant voltage charging phase and a charging termination phase.

Curve A in the figure represents the voltage of the battery, and curve B represents the charging current of the battery.

During the trickle charging stage, the electronic device adopts LDO (Low Dropout Regulator, low dropout linear regulator) charging mode, which corresponds to INT0-INT1 in the figure.

This embodiment does not specifically limit the constant current charging stage to be divided into several stages, and the constant current charging stage can be divided into multiple stages, for example: CC1 stage (corresponding between INT1-INT2 in the figure), CC2 stage (corresponding to INT2-INT2 in the figure) between INT3) and CC3 stages (corresponding between INT3-INT4 in the figure).

CV in the figure represents the constant voltage charging stage, corresponding to the period between INT4-INT5 in the figure. C1, C2 and C3 respectively represent the charging currents of the CC1 stage, CC2 stage and CC3 stage during the constant current charging stage.

The trickle charging stage, the constant current charging stage and the constant voltage charging stage are described in detail below.

When the voltage of the battery of the electronic device is lower than the pre-charge charging threshold, the charging device can determine that the charging stage of the battery is a trickle charging stage when charging the electronic device.

The present application does not limit the pre-charge threshold, which may be 2.8V or 3V, and those skilled in the art may select an appropriate pre-charge threshold according to actual needs.

In the trickle charging stage, the charging device will output a small voltage to the electronic equipment to charge the battery with a small current.

In the trickle charging stage, as the charging time increases, the battery capacity will increase, and the battery voltage will also increase. When the voltage of the battery is greater than or equal to the precharge charging threshold, the charging stage changes from a trickle charging stage to a constant current charging stage.

In the constant current charging stage, the battery can be charged with a large current, and the charging power at this time is relatively large, that is, the fast charging function is realized. As the charging time increases, the voltage of the battery further increases. When the voltage of the battery is greater than or equal to the fast charging threshold, the charging phase changes from a constant current charging phase to a constant voltage charging phase.

In the constant voltage charging stage, the voltage of the battery remains almost constant, the charging current gradually decreases, and the charging process is gradually completed.

At present, there are differences in the high-power charging technologies of different equipment manufacturers, and the charging power of the battery is also different. When electronic equipment uses non-standard batteries or low-quality batteries, the charging power may exceed the battery’s own charging specifications and cause safety accidents. For example, the charging current during constant current charging is too high, which may cause damage to the battery. In severe cases, there may be fire and explosion risks of.

At present, the encryption anti-counterfeiting integrated IC is generally used to realize the safety protection of the battery. When the encrypted anti-counterfeiting IC finds that the current battery of the electronic device is a non-standard battery, the electronic device can reduce the charging power of the battery, such as charging with a small current, to reduce potential safety hazards. However, the encrypted anti-counterfeiting IC needs to have a built-in encryption algorithm, which leads to complex design of the encrypted anti-counterfeiting IC and high hardware cost.

In order to solve the above problems, the present application provides a battery protection device, a battery protection method, and electronic equipment. The matching relationship between the electronic equipment and the battery is stored on the logic IC by using the readable and writable registers of the logic IC. When replacing with a non-standard battery or a low-quality battery, the power-off information of the logic IC is cleared to zero, and if the information does not match after restarting, it can detect that the battery has been replaced, and then change the corresponding charging mode. Therefore, this solution can reduce hardware costs on the premise of ensuring battery charging safety.

In order to make those skilled in the art understand the solutions of the present application more clearly, the technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

Words such as "first" and "second" in the description of the present application are used for description purposes only, and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features.

In this application, unless otherwise clearly stipulated and limited, the term "connection" should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral body; it can be a direct connection, or Can be connected indirectly through intermediaries.

Refer to FIG. 3 , which is a schematic diagram of a battery protection device provided by an embodiment of the present application.

The battery protection device includes: a main control chip 401 and a logic chip 301 .

The main control chip 401 is arranged on the main board 40 of the electronic device, and is an important part of the main board of the electronic device. In a possible implementation manner, the main control chip 401 may be a CPU of an electronic device.

Second identification information is stored on the main control chip 401 .

The battery 194 of the electronic device includes a battery protection plate 30 and a battery cell 31 . Among them, the battery protection board 31 is mainly an integrated circuit board that protects rechargeable (generally referred to as a lithium battery). Since the battery cell 31 itself cannot be overcharged, over-discharged, over-current, short-circuited or ultra-high temperature charged and discharged, the battery cell 31 is always matched with the battery protection plate 30 and packaged together to form a battery.

The logic chip 301 can also be called a Programmable Logic Device (Programmable Logic Device, PLD), which is an electronic component, and in short is also an integrated circuit. The logic chip 301 belongs to a digital type circuit chip. In the embodiment of the present application, the logic chip 301 is used to store the first identification information. That is to say, in the embodiment of the present application, the readable and writable registers on the logic chip 301 are used for storage, that is, the logic chip 301 only needs to implement a simple storage function and does not need to have a built-in complex encryption algorithm. Therefore, the logic chip 301 The implementation method is simple and the cost is lower.

The first identification information and the second identification information are used to represent the matching relationship between the electronic device and the battery. When the first identification information matches the second identification information, it indicates that the electronic device matches the battery at this time, that is, the battery has not been replaced; When the first identification information does not match the second identification information, it indicates that there is a risk of abnormal power failure of the electronic device at this time, or the battery of the electronic device is replaced.

The main control chip 401 is electrically connected to the logic chip 301 . The embodiment of the present application does not specifically limit the implementation manner of the electrical connection, for example, the connection may be implemented through a single signal line, or the connection may be implemented through multiple signal lines.

When the electronic device is turned on or starts to be charged, the main control chip 401 reads the second identification information stored by itself, and reads the first identification information stored in the logic chip 301 . The main control chip 401 compares the first identification information with the second identification information. When the first identification information matches the second identification information, it indicates that the battery of the electronic device has not been replaced at this time. Charging mode charges the battery. At this time, the main control chip 401 can control the charging management module of the electronic device to adopt a normal charging mode for the electronic device and execute a normal charging strategy, for example, high-power fast charging can be normally used.

When the first identification information does not match the second identification information, or the first identification information is not read, it indicates that the battery of the electronic device may be replaced at this time, in order to avoid potential safety hazards at this time, The main control chip 401 controls the charging management module of the electronic device to reduce the charging power for the battery.

In summary, using the battery protection device provided by the embodiment of the present application, an ordinary logic chip is selected, and the readable and writable register of the logic IC is used to store the matching relationship between the electronic device and the battery on the logic chip, and in the main control chip The matching relationship is also stored on the computer, and by comparing the two matching relationships, it can be determined whether the battery has been replaced. This solution does not require a built-in encryption algorithm on the logic chip, and has low requirements on the logic chip. Therefore, it can reduce hardware costs while ensuring battery charging safety, and has high practicability.

The working principle of the battery protection device will be described below in combination with a specific implementation manner.

Refer to FIG. 4 , which is a schematic diagram of another battery protection device provided by an embodiment of the present application.

The difference between this battery protection device and FIG. 3 is that it further includes a data interface 402 .

When the electronic equipment leaves the factory, the battery protection device is built in, and the logic chip 301 stores initial first identification information when it leaves the factory. The initial first identification information is generated according to the identification code of the electronic device, the identification code of the battery and initial time information.

In a possible implementation manner, the identification code of the electronic device is a product serial number (SerialNumber, SN) of the electronic device, and the identification code of the battery is the SN code of the battery. In practical applications, the identification code may also use other characters or character strings with a unique identification function, which are not specifically limited in this embodiment of the present application.

The logic chip 301 is electrically connected to the main control chip 401 to realize communication. The embodiment of the present application does not specifically limit the implementation manner of the electrical connection, for example, the connection may be implemented through a single signal line, or the connection may be implemented through multiple signal lines.

In addition, the main control chip 401 is arranged on the main board 40 of the electronic device, and the grounding of the logic chip 301 is provided by the main board 40 , that is, the ground terminal of the chip 301 is connected to the main board 40 through wiring, and the grounding is realized through the grounding port of the main board 40 . When the ground terminal of the logic chip 301 is disconnected from the motherboard 40, the first identification information stored by itself is cleared.

That is, if the battery 194 is replaced, since the ground terminal of the chip 301 is connected to the main board 40 by wiring to realize grounding, the logic chip 301 will be powered down, and the logic chip 301 is configured to clear data when power is off. In some other embodiments, the logic chip 301 can also be configured to wait for a certain period of time (for example, several seconds) before clearing the data when the power is turned off, so as to prevent accidental circumstances such as poor contact from occasionally causing the first identification information to be cleared.

The identification principle of the battery protection device will be described in detail below.

When the electronic device is turned on or charged by the charging device, the main control chip 401 acquires the stored second identification information, which is generated according to the identification code of the electronic device, the identification code of the battery and the network time.

The main control chip 401 reads the first identification information stored in the logic chip 301 . Similarly, the first identification information is generated according to the identification code of the electronic device, the identification code of the battery, and the network time.

When the main control chip 401 reads the first identification information and the first identification information matches the second identification information, it means that the battery of the electronic device has not been replaced at this time.

Where the first identification information matches the second identification information, it means that the identification code of the device, the identification code of the battery and the network time represented by the two are the same. The network time may be the last time when the main control chip 401 updated the first identification information and the second identification information, or the last time when the main control chip 401 performed battery identification.

For a device that is turned on or charged for the first time, the network time corresponding to the first identification information and the second identification information can be set as the initial network time, which is a set value, which is not specifically limited in this embodiment of the present application

When the main control chip 401 reads the first identification information and the first identification information matches the second identification information, the main control chip 401 generates an updated second identification code according to the current time, the identification code of the electronic device, and the identification code of the battery. An identification information and updated second identification information, storing the updated second identification information and writing the updated first identification information into the logic chip 301 . In a possible implementation manner, the first identification information generated by the main control chip 401 is consistent with the data included in the second identification information, but are stored on different devices.

In practical applications, in some embodiments, the main control chip 401 stores the updated second identification information only after the first identification information is successfully written into the logic chip 301 ; otherwise, the original second identification information remains unchanged.

Then the main control chip 401 controls the charging management module of the electronic device to charge the battery according to the normal charging mode, for example, high-power fast charging for the battery.

In other embodiments, when the first identification information read by the main control chip 401 does not match the second identification information, or the first identification information is not read, the main control chip 401 controls the charging management of the electronic device The module reduces the charging power of the battery, which will be explained separately below.

In a possible situation, the battery has been replaced, but the logic chip 301 described in this application is set in the replaced battery, but because the identification codes of the batteries are different, although the logic chip 301 and the main control chip 401 The electrical connection is normal, but the first identification information stored on the logic chip 301 is inconsistent with the second identification information stored on the main control chip 401 , and the first identification information read by the main control chip 401 is not empty data.

When the first identification information read by the main control chip 401 is inconsistent with the second identification information, the charging management module of the electronic device is controlled to charge the electronic device according to the lowest charging power supported by the battery device, so as to avoid damage to the battery by high-power charging. Thereby reducing potential safety hazards.

The embodiment of the present application does not limit the specific specification of the minimum charging power, which may be determined according to the actual situation of the electronic device. In addition, when the first identification information read by the main control chip 401 is inconsistent with the second identification information, it can also record the time of this identification, and generate a corresponding log for recording, so that subsequent equipment maintain.

In another possible situation, the user replaces a non-standard battery, and the logic chip 301 described in this application is not set in the battery. Therefore, the main control chip 401 cannot obtain the first identification information at this time, and the electrical connection between the main control chip 401 and the logic chip 301 is disconnected at this time.

When the main control chip 401 does not obtain the first identification information and the voltage of the battery is greater than the first voltage value, the charging management module of the electronic device is controlled to charge the electronic device according to the lowest charging power supported by the battery device, so as to avoid high power Charging damages the battery, which in turn reduces the safety hazard.

The reason for setting the criterion that the voltage of the battery is greater than the first voltage value is that if the battery has not been replaced and the battery is over-discharged, the logic chip 301 may be powered off, and the main control chip 401 cannot read the first identification at this time. information, the logic chip 301 easily misjudges that the battery has been replaced. In order to avoid this situation, a condition that the voltage of the battery is greater than the first voltage value is set. When the voltage of the battery is greater than the first voltage value, it indicates that the battery has not been over-discharged at this time, and misjudgment is avoided.

In practical applications, the over-discharge of the battery may be due to the electronic equipment not being used for a long time, and the battery not being charged for a long time leads to excessive power consumption.

The embodiment of the present application does not limit the specific specification of the minimum charging power, which may be determined according to the actual situation of the electronic device. In addition, when the main control chip 401 cannot obtain the first identification information and the voltage of the battery is greater than the first voltage value, it judges that the battery may be replaced at this time, and can also record the time of this identification, and generate a corresponding log for recording , to facilitate subsequent equipment maintenance.

In yet another possible implementation manner, the main control chip 401 may determine whether to reduce the charging power for the battery according to whether the electrical connection with the logic chip 301 is normal. When the electrical connection is disconnected, it indicates that there is an abnormal power-off behavior at this time. On the one hand, the electrical connection may be disconnected due to battery replacement; If the connection is disconnected, no matter which of the above situations occurs, there will be safety hazards in the normal high-power charging mode for the battery. Therefore, when the electrical connection between the main control chip 401 and the logic chip 301 is disconnected, the charging management module of the electronic device is controlled to charge the battery according to the lowest charging power supported by the electronic device.

In addition, when the electrical connection between the main control chip 401 and the logic chip 301 is disconnected, it can also record the time of this identification, and generate a corresponding log for recording, so as to facilitate subsequent equipment maintenance.

In yet another possible implementation, the battery of the electronic device has not been replaced, but the battery has been over-discharged, for example, the electronic device has not been charged for a long time, and the main control chip 401 has not obtained the first identification information at this time. . In order to identify this situation and avoid misjudgment of battery replacement, the solution of the present application, when the logic chip does not read the first identification information, and the voltage of the battery when it starts charging is less than the first voltage value, and the voltage of the battery is changed by the second voltage When the time taken for the value to drop to the first voltage value is longer than the preset time, the electronic device is controlled to charge the battery in a derating charging mode.

The application does not specifically limit the first voltage value, the second voltage value and the preset time. Wherein, the first voltage value is smaller than the second voltage value. Taking the electronic device as a mobile phone as an example, the first voltage value may be set to 2.6V, and the second voltage value may be set to 3.6V. When the voltage of the battery is lower than the first voltage value, it indicates that the voltage of the battery is too low at this time, and over-discharge may occur. The preset time can be determined by performing an idle test on the electronic equipment in advance. In practical applications, the main control chip 401 may determine the time taken for the voltage of the battery to drop from the second voltage value to the first voltage value from the latest log of the electronic device.

The embodiment of this application does not limit the specific specifications of the derating charging mode. The charging power of the derating charging mode is lower than the charging power of the normal charging mode, and higher than the minimum charging power supported by the electronic device. The specific charging power can be based on the actual situation of the electronic device. Sure. In practical applications, since the battery of the electronic device is only over-discharged but not replaced in this case, the charging power in the derating charging mode can be set to be slightly lower than the charging power in the normal charging mode.

In addition, the main control chip 401 can record the time of this identification, and generate a corresponding log for recording, so as to facilitate subsequent equipment maintenance.

In another possible implementation, the battery of the electronic device has not been replaced, but the logic chip 301 is powered off due to an accidental drop or collision, or short-term disassembly during maintenance, and the first stored on the logic chip 301 The identification information is cleared, and then the logic chip 301 is normally powered on, and the normal connection with the main control chip 401 is resumed. In order to identify this situation, when the electrical connection between the main control chip 401 and the logic chip 301 is normal, but the first identification information read is empty data, the charging management module of the control electronic device performs battery charging according to the derating charging mode. Charge.

In addition, the main control chip 401 can record the time of this identification, and generate a corresponding log for recording, so as to facilitate subsequent equipment maintenance.

The device motherboard 40 in the embodiment of the present application further includes a data interface 402 . The production line or maintenance point of electronic equipment can connect the data interface with external equipment. The main control chip 401 authenticates the external device to determine whether the external device complies with regulations and is an official device. After the authentication of the external device is passed, the external device can control and read and write the main control chip 401, store the updated second identification information in the main control chip 401, and control the main control chip 401 to write an update to the logic chip. After the first identification information.

When connecting external devices on the production line, the identification information stored on the main control chip 401 and logic chip 301 can be initialized; Update, that is, when the battery of the electronic device needs to be replaced, first replace the standard battery, obtain the identification code of the new battery, that is, the device serial number of the new battery, and then use the data interface 402 on the main control chip 401 and the logic chip At 301, the corresponding identification information is updated.

In addition, for the following two situations, it is also possible to update the corresponding identification information on the main control chip 401 and the logic chip 301 by connecting an external device through the data interface 402, so that the charging management module of the electronic device can charge the battery normally model:

1. The battery of the electronic device has not been replaced, but due to accidental drop or collision, etc., or short-term disassembly during maintenance, the logic chip is powered off, the first identification information stored on the logic chip is cleared, and then the logic chip Power on normally, and restore normal connection with the main control chip.

2. The battery of the electronic device has not been replaced, but the battery has been over-discharged. For example, the electronic device has been idle for a long time without charging the battery. At this time, the main control chip cannot obtain the first identification information.

For the above two cases, since the battery is not actually replaced, the normal charging mode for the battery can be resumed.

In summary, using the battery protection device provided by the embodiment of the present application, an ordinary logic chip is selected, and the readable and writable register of the logic IC is used to store the matching relationship between the electronic device and the battery on the logic chip, and in the main control chip The matching relationship is also stored on the computer, and by comparing the two matching relationships, it can be determined whether the battery has been replaced. This solution does not require a built-in encryption algorithm on the logic chip, and has low requirements on the logic chip. Therefore, it can reduce hardware costs while ensuring battery charging safety, and has high practicability. In addition, the battery protection device can also distinguish the battery over-discharge, the battery has not been replaced but the main control chip and the logic chip have a communication failure, the battery has not been replaced but the power is lost for a short time, etc., so as to adopt the corresponding charging mode, with high Practicality further improves the safety of electronic equipment and reduces the risk of accidents.

Based on the battery protection device provided in the above embodiments, the present application also provides a battery protection method, which will be described in detail below with reference to the accompanying drawings.

Referring to FIG. 5 , this figure is a flow chart of a battery protection method provided by an embodiment of the present application.

The method is applied to the main control chip of electronic equipment, the main control chip stores the second identification information, and the main control chip can read the first identification information stored in the logic chip. For the specific implementation of the main control chip and the logic chip, please refer to the above The description in the embodiment will not be repeated here. The method includes the following processes:

S101: Read the first identification information stored in the logic chip.

The logic chip is electrically connected to the main control chip, and the logic chip is located on the battery protection board.

When the electronic device is turned on or starts to be charged, the main control chip reads the second identification information stored by itself, and reads the first identification information stored in the logic chip.

The first identification information and the second identification information are used to represent the matching relationship between the electronic device and the battery. When the first identification information matches the second identification information, it indicates that the electronic device matches the battery at this time, that is, the battery has not been replaced; When the first identification information does not match the second identification information, it indicates that there is a risk of abnormal power failure of the electronic device at this time, or the battery of the electronic device is replaced.

S102: When the first identification information matches the second identification information, control the electronic device to charge the battery in a normal charging mode.

The main control chip can control the charging management module of the electronic device to adopt a normal charging mode for the electronic device and execute a normal charging strategy, for example, it can normally use high-power fast charging.

S103: When the first identification information does not match the second identification information or the first identification information is not read, control the electronic device to reduce the charging power of the battery.

When the first identification information does not match the second identification information, or the first identification information is not read, it indicates that the battery of the electronic device may be replaced at this time, in order to avoid potential safety hazards at this time, The main control chip controls the charging management module of the electronic device to reduce the charging power to the battery.

The following will describe in conjunction with a specific implementation manner.

Referring to FIG. 6 , this figure is a flow chart of another battery protection method provided by an embodiment of the present application.

S201: Read the first identification information stored in the logic chip.

S202: Whether the first identification information matches the second identification information.

If yes, execute S203; otherwise, execute S205.

S203: Generate updated first identification information and updated second identification information according to the current time, the identification code of the electronic device, and the identification code of the battery, store the updated second identification information and store the updated first identification information The identification information is written into the logic chip.

At this time, after each charging, the first identification information and the second identification information are updated, that is, the first identification information and the second identification information are not fixed, which improves the security of information.

The identification code of the electronic equipment is the product serial code of the electronic equipment, and the identification code of the battery is the product serial code of the battery.

S204: Control the electronic device to charge the battery according to the normal charging mode.

The main control chip can control the charging management module of the electronic device to adopt a normal charging mode for the electronic device and execute a normal charging strategy, for example, it can normally use high-power fast charging.

S205: Whether the electrical connection between the main control chip and the logic chip is disconnected.

If yes, execute S211; if not, execute S206.

S206: Whether the first identification information is read.

If yes, execute S209; if not, execute S207.

S207: Whether the battery voltage is greater than the first voltage value.

If yes, execute S211; if not, execute S208.

When the battery voltage of the electronic device is greater than the first voltage value before the electronic device is started or charged, it indicates that the battery of the electronic device is not over-discharged at this time, and it is determined that the battery may be replaced at this time. Taking the electronic device as a mobile phone as an example, the first voltage value can be set to 2.6V. When the battery voltage is lower than the first voltage value, it indicates that the battery voltage is too low at this time, and over-discharge may occur.

S208: Whether the time taken for the voltage of the battery to drop from the second voltage value to the first voltage value is longer than a preset time.

If yes, execute S210; if not, execute S211.

When the time taken for the voltage of the battery to drop from the second voltage value to the first voltage value is less than the preset time, it means that the battery is not over-discharged at this time, so it is determined that the battery may be replaced.

And when the time taken for the voltage of the battery to drop from the second voltage value to the first voltage value is longer than the preset time, it means that the electronic device has not charged the battery for a long time at this time, resulting in the battery voltage being too low and possibly over-discharging. The preset time can be determined by performing an idle test on the electronic equipment in advance.

In practical applications, the time taken for the voltage of the battery to drop from the second voltage value to the first voltage value can be determined from the latest log of the electronic device.

S209: Whether the read first identification information is empty data.

If yes, execute S210; if not, execute S211.

When the first identification information is empty data, it indicates that the following situation may occur at this time: the battery of the electronic device has not been replaced, but due to accidental drop or collision, or short-term disassembly during maintenance, the logic chip is powered off, The first identification information stored on the logic chip is cleared, and then the logic chip is normally powered on, and the normal connection with the main control chip is restored.

When the first identification information is not empty data, it indicates that the following situation may occur at this time: the battery has been replaced, but the logic chip described in this application is installed in the replaced battery, but because the identification code of the battery is different, although the logic chip The electrical connection between the chip and the main control chip is normal, but the first identification information stored on the logic chip is inconsistent with the second identification information stored on the main control chip.

S210: Control the electronic device to charge the battery according to the derating charging mode.

The embodiment of this application does not limit the specific specifications of the derating charging mode. The charging power of the derating charging mode is lower than the charging power of the normal charging mode, and higher than the minimum charging power supported by the electronic device. The specific charging power can be based on the actual situation of the electronic device. Sure. In practical applications, the charging power in the derating charging mode can be set to be slightly lower than the charging power in the normal charging mode.

S211: Control the electronic device to charge the battery according to the supported minimum charging power.

The charging management module that controls the electronic equipment charges the electronic equipment according to the minimum charging power supported by the battery equipment, so as to avoid damage to the battery by high-power charging, thereby reducing potential safety hazards.

The division of the above steps is only for convenience of description, and does not constitute a limitation to the technical solution of the present application. In practical applications, those skilled in the art may adjust the above steps according to the conditions of the electronic equipment.

Further, in some other embodiments, the following steps may also be included:

Connecting to an external device through a data interface, and authenticating the external device;

After the authentication is passed, under the control of the external device, the updated second identification information is stored, and the updated first identification information is written into the logic chip.

When connecting external devices on the production line, the identification information stored on the main control chip and logic chip can be initialized; when the maintenance point is connected to external devices, the data stored on the logic chip can be updated through the main control chip, and also That is, when the battery of an electronic device needs to be replaced, first replace the standard battery, obtain the identification code of the new battery, that is, the device serial number of the new battery, and then update the corresponding identification information on the main control chip and logic chip through the data interface.

In addition, for the following two cases, since the battery of the electronic device has not been replaced, it is also possible to re-update the corresponding identification information on the main control chip and the logic chip by connecting an external device through the data interface, so that the charging management module of the electronic device can Apply normal charging mode to the battery:

1. The battery of the electronic device has not been replaced, but due to accidental drop or collision, etc., or short-term disassembly during maintenance, the logic chip is powered off, the first identification information stored on the logic chip is cleared, and then the logic chip Power on normally, and restore the normal connection with the main control chip;

2. The battery of the electronic device has not been replaced, but the battery has been over-discharged. For example, the electronic device has been idle for a long time without charging the battery. At this time, the main control chip cannot obtain the first identification information.

In summary, using this method, by storing the matching relationship between the electronic device and the battery on the logic chip, and also storing the matching relationship on the main control chip, by comparing the two matching relationships, it can be determined whether the battery is damaged or not. replace. The method does not need to build an encryption algorithm on the logic chip, and has low requirements on the logic chip, so it can reduce hardware costs under the premise of ensuring battery charging safety, and has high practicability. In addition, this method can also distinguish the battery over-discharge, the battery has not been replaced but the main control chip and the logic chip have a communication failure, the battery has not been replaced but the power is lost for a short time, etc., so as to adopt the corresponding charging mode, which has high practicability , which further improves the safety of electronic equipment and reduces the risk of accidents.

Based on the battery protection device and battery protection method provided in the above embodiments, the present application also provides an electronic device, which will be described in detail below with reference to the accompanying drawings.

Referring to FIG. 7 , this figure is a schematic diagram of an electronic device provided by an embodiment of the present application.

The electronic device 70 provided in the embodiment of the present application includes a battery protection device 701 and a battery cell 31 .

Wherein, the battery protection device 701 includes a logic chip 301 and a main control chip 401 .

The logic chip 301 is located on the battery protection board 30 . The main control chip 401 can be integrated on the main board 40 of the electronic device 70 .

For the specific implementation and working principles of the logic chip 301 and the main control chip 401 , reference may be made to relevant descriptions in the above embodiments, and details will not be repeated here in the embodiments of the present application.

The battery cell 31 and the battery protection board 30 are packaged to form the battery 194 , that is, the logic chip 301 is located in the battery 194 .

The battery 194 is used for powering the electronic device 70 .

In some embodiments, the main control chip further includes a data interface 402 , and the data interface is connected to the external interface on the main board 40 through wires. When the external interface on the main board 40 is connected with an external device, that is, the data interface 402 is connected with an external device. The embodiment of the present application does not specifically limit the type of the external device, for example, it may be a mobile phone, a tablet computer, a PC, or a notebook computer.

The production line or maintenance point of electronic equipment can connect the data interface with external equipment. The main control chip 401 authenticates the external device to determine whether the external device complies with regulations and is an official device. After the authentication of the external device is passed, the external device can control and read and write the main control chip 401, store the updated second identification information in the main control chip 401, and control the main control chip 401 to write an update to the logic chip. After the first identification information.

When connecting external devices on the production line, the identification information stored on the main control chip 401 and logic chip 301 can be initialized; Update, that is, when the battery of the electronic device needs to be replaced, first replace the standard battery, obtain the identification code of the new battery, that is, the device serial number of the new battery, and then use the data interface 402 on the main control chip 401 and the logic chip At 301, the corresponding identification information is updated.

In addition, for the following two situations, it is also possible to update the corresponding identification information on the main control chip 401 and the logic chip 301 by connecting an external device through the data interface 402, so that the charging management module of the electronic device can charge the battery normally model:

1. The battery of the electronic device has not been replaced, but due to accidental drop or collision, etc., or short-term disassembly during maintenance, the logic chip is powered off, the first identification information stored on the logic chip is cleared, and then the logic chip Power on normally, and restore normal connection with the main control chip.

2. The battery of the electronic device has not been replaced, but the battery has been over-discharged. For example, the electronic device has been idle for a long time without charging the battery. At this time, the main control chip cannot normally obtain the first identification information.

In a possible implementation manner, the data interface 402 can be connected to a USB interface on the electronic device, and at this time, the external device can be connected to the data interface 402 through the USB interface of the electronic device. The USB interface can be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc., which are not specifically limited in the embodiments of the present application.

The embodiment of the present application does not specifically limit the type of electronic device, and the electronic device may be a mobile phone, a wearable electronic device (such as a smart watch), a tablet computer, an augmented reality (augmented reality, AR) device, a virtual reality (virtual reality, VR) device, etc. .

To sum up, the electronic equipment uses a battery protection device. The battery protection device uses an ordinary logic chip, and uses the readable and writable registers of the logic chip to store the matching relationship between the electronic equipment and the battery on the logic chip, and in the main The matching relationship is also stored on the control chip. By comparing the two matching relationships, it can be determined whether the battery has been replaced. This solution does not require a built-in encryption algorithm on the logic chip, and has low requirements on the logic chip. The main control chip can directly multiplex the processor on the electronic device, so it can reduce the hardware cost of the electronic device while ensuring the safety of battery charging. , has high practicability. In addition, the battery protection device can also distinguish the battery over-discharge, the battery has not been replaced but the main control chip and the logic chip have a communication failure, the battery has not been replaced but the power is lost for a short time, etc., so as to adopt the corresponding charging mode, with high Practicality further improves the safety of electronic equipment and reduces the risk of accidents.

It should be understood that in this application, "at least one (item)" means one or more, and "multiple" means two or more. "And/or" is used to describe the association relationship of associated objects, indicating that there can be three types of relationships, for example, "A and/or B" can mean: only A exists, only B exists, and A and B exist at the same time , where A and B can be singular or plural.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended 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: it can still understand the foregoing The technical solutions described in each embodiment are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the application.

Claims (19)

1. A battery protection device, characterized in that it is set on an electronic device, the battery of the electronic device includes a battery cell and a battery protection board, and the battery protection device includes: a main control chip and a logic chip; Electrical connection between the logic chip and the main control chip; The logic chip is located on the battery protection board; The logic chip is used to store first identification information; The main control chip is used to store the second identification information, and read the first identification information stored in the logic chip, and when the first identification information matches the second identification information, control the The electronic device charges the battery according to the normal charging mode; when the first identification information does not match the second identification information or the first identification information is not read, control the electronic device to reduce the The charging power of the battery. 2. The battery protection device according to claim 1, wherein the main control chip is specifically configured to: when the first identification information matches the second identification information, according to the current time, the The identification code of the electronic device and the identification code of the battery, generate updated first identification information and updated second identification information, store the updated second identification information and store the updated first identification information information is written to the logic chip. 3. The battery protection device according to claim 2, wherein the identification code of the electronic device is a product serial code of the electronic device, and the identification code of the battery is a product serial code of the battery. 4. The battery protection device according to claim 3, wherein the main control chip is arranged on the main board of the electronic device; The ground terminal of the logic chip is used for grounding through the main board; When the ground terminal of the logic chip is disconnected from the motherboard, the stored first identification information is cleared. 5. The battery protection device according to claim 4, wherein the main control chip is specifically configured to when the read first identification information is inconsistent with the second identification information, or when When the first identification information is not read and the voltage of the battery is greater than a first voltage value, the electronic device is controlled to charge the battery according to the lowest charging power supported by the electronic device. 6. The battery protection device according to claim 5, wherein the main control chip is also used to control the electronic device to follow the electronic device when the electrical connection with the logic chip is disconnected. Charge the battery with the lowest supported charging power. 7 . The battery protection device according to claim 4 , wherein the main control chip is specifically configured to: when the first identification information is not read and the voltage of the battery is lower than the first voltage value, and when the time taken for the voltage of the battery to drop from the second voltage value to the first voltage value is greater than the preset time, the electronic device is controlled to charge the battery according to the derating charging mode, and the derating charging The charging power of the mode is lower than the charging power of the normal charging mode and higher than the minimum charging power supported by the electronic device, and the second voltage value is greater than the first voltage value. 8 . The battery protection device according to claim 7 , wherein the main control chip is further configured to: when the electrical connection with the logic chip is normal, but the first identification information read is When the data is empty, the electronic device is controlled to charge the battery according to the derating charging mode. 9. The battery protection device according to any one of claims 1 to 8, wherein the main control chip further includes a data interface; The data interface is used to connect external equipment; The main control chip is also used to authenticate the external device, and after the authentication is passed, under the control of the external device, store the updated second identification information and write it into the logic chip The updated first identification information. 10. A battery protection method, characterized in that it is applied to a main control chip of an electronic device, the main control chip stores second identification information, and the method comprises: Read the first identification information stored in the logic chip, the logic chip is electrically connected to the main control chip, and the logic chip is located on the battery protection board; When the first identification information matches the second identification information, controlling the electronic device to charge the battery in a normal charging mode; When the first identification information does not match the second identification information or the first identification information is not read, the electronic device is controlled to reduce the charging power of the battery. 11. The battery protection method according to claim 10, wherein when the first identification information matches the second identification information, the electronic device is controlled to charge the battery in a normal charging mode. charging, including: When the first identification information matches the second identification information, generate updated first identification information and updated first identification information according to the current time, the identification code of the electronic device, and the identification code of the battery. 2. Identification information; storing the updated second identification information and writing the updated first identification information into the logic chip; And control the electronic device to charge the battery according to the normal charging mode. 12. The battery protection method according to claim 11, wherein the identification code of the electronic device is a product serial code of the electronic device, and the identification code of the battery is a product serial code of the battery. 13. The battery protection method according to claim 11, wherein the main control chip is arranged on the main board of the electronic device; the ground terminal of the logic chip is grounded through the main board; the ground terminal of the logic chip When the terminal is disconnected from the main board, clear the stored first identification information. 14. The battery protection method according to claim 13, wherein when the first identification information does not match the second identification information or the first identification information is not read, the control unit The electronic device reduces the charging power of the battery, specifically including: When the read first identification information is inconsistent with the second identification information, or when the first identification information is not read and the voltage of the battery is greater than the first voltage value, control the The electronic device charges the battery according to the lowest charging power supported by the electronic device. 15. The battery protection method according to claim 14, further comprising: When the electrical connection with the logic chip is disconnected, the electronic device is controlled to charge the battery according to the lowest charging power supported by the electronic device. 16. The battery protection method according to claim 13, wherein when the first identification information does not match the second identification information or the first identification information is not read, the control unit The electronic device reduces the charging power of the battery, specifically including: When the first identification information is not read, and the voltage of the battery when charging starts is less than the first voltage value, and the time taken for the voltage of the battery to drop from the second voltage value to the first voltage value is longer than a preset time , control the electronic device to charge the battery according to the derating charging mode, the charging power of the derating charging mode is lower than the charging power of the normal charging mode, and higher than the minimum charging power supported by the electronic device , the second voltage value is greater than the first voltage value. 17. The battery protection method according to claim 16, further comprising: When the electrical connection with the logic chip is normal, but the read first identification information is empty data, control the electronic device to charge the battery according to the derating charging mode. 18. The battery protection method according to any one of claims 10 to 17, further comprising: Connecting to an external device through a data interface, and authenticating the external device; After the authentication is passed, under the control of the external device, the updated second identification information is stored, and the updated first identification information is written into the logic chip. 19. An electronic device, characterized in that the electronic device comprises the battery protection device according to any one of claims 1-9, and further comprises a battery cell; The battery cell and the battery protection plate form the battery; The battery is used to power the electronic device.

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