CN116054301B - A battery protection device, battery protection method and electronic equipment - Google Patents

Abstract

This application provides a battery protection device, a battery protection method and electronic equipment, and relates to the field of terminal technology. The battery protection device is provided in electronic equipment. The battery of the electronic equipment includes a battery core and the battery protection plate. The battery protection device includes: a main control chip and a logic chip; the logic chip and the main control chip are electrically connected; the logic chip 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 first identification information stored in the logic chip. When the first identification information When the information matches the second identification information, the electronic device is controlled to charge 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, the electronic device is controlled to charge the battery. The device reduces charging power to the battery. This solution can reduce hardware costs while ensuring battery charging safety.

Description

A battery protection device, battery protection method and electronic equipment

Technical field

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

Background technique

With the advancement of battery charging technology, high-power charging is now increasingly used in electronic devices. In addition, the rated capacity of batteries used in electronic devices is also increasing.

At present, there are differences in the high-power charging technology 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, which may cause the charging power to exceed the battery's own charging specifications, encryption and anti-counterfeiting integrated circuits (ICs) are generally used to achieve battery safety protection. When the encryption anti-counterfeiting IC discovers that the current battery of the electronic device is a non-standard battery, the electronic device can reduce the charging current of the battery to reduce safety risks.

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

Contents of the invention

In order to solve the above problems, this application provides a battery protection device, a battery protection method and electronic equipment, which can reduce hardware costs while ensuring the safety of battery charging.

In a first aspect, this application provides a battery protection device. The battery protection device is provided in an electronic device. The electronic device includes a battery protection board. The battery protection device includes a main control chip and a logic chip. Among them, the logic chip and the main control chip are electrically connected, 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, controls 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 read-write register 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 the safety of battery charging, and has high practicability.

In a possible implementation, the main control chip is specifically configured to: when matching the first identification information and the second identification information, based on the current time, the identification code of the electronic device and the The identification code of the battery is generated, the updated first identification information and the updated second identification information are generated, the updated second identification information is stored, and the updated first identification information is written into the logic chip. . At this time, after each charging, the first identification information and the second identification information will be updated, that is, the first identification information and the second identification information are not fixed, which improves the security of the information.

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

In a possible implementation, the main control chip is provided on the mainboard of the electronic device; the grounding terminal of the logic chip is used for grounding through the mainboard; the grounding terminal of the logic chip is connected to the mainboard. When disconnecting, 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 motherboard, causing the first protection information on the logic chip to be cleared. . This is so that it can be determined based on the first protection information whether the battery has been replaced or abnormal power loss has occurred.

In a possible implementation, the main control chip is specifically used when the read first identification information and the second identification information are inconsistent, 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 and the second identification information are inconsistent, 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 has The logic chip described in this application is provided, but due to the different identification codes of the batteries, 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, the main control chip is also used 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, the main control chip is specifically used when the first identification information is not read, and the voltage of the battery when it starts charging is less than the first voltage value, and the voltage of the battery is When the time it takes for the second voltage value to drop to the first voltage value is greater than the preset time, the electronic device is controlled to charge the battery in a derating charging mode, and the charging power in the derating charging mode is lower than the normal charging. The charging power of the mode is higher than the lowest 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 it has been over-discharged and the first identification information cannot be read. The charging power in the derated charging mode can be set to be slightly less than the charging power in the normal charging mode.

In a possible implementation, the main control chip is also used to control the electronic device according to the The derated charging mode charges the battery.

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

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 Finally, under the control of the external device, the updated second identification information is stored, and the updated first identification information is written to 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 and set; when the maintenance point connects external equipment, the data stored on the logic chip can be updated through the main control chip, and the data stored on the logic chip can be updated through the main control chip. 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, which 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, this application also provides a battery protection method, which is applied to a main control chip. The main control chip stores second identification information. The method includes: reading 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, the electronic device is controlled to charge all cells 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.

Using this method, the matching relationship between the electronic device and the battery is stored on the logic chip, and the matching relationship is also stored on the main control chip. By comparing the two matching relationships, it can be determined whether the battery has been replaced. This method 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 the safety of battery charging, and has high practicability.

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

When the first identification information matches the second identification information, the updated first identification information and the updated third identification information are generated based on the current time, the identification code of the electronic device and the identification code of the battery. 2. Identification information;

Store the updated second identification information and write 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, the identification code of the electronic device is the product serial code of the electronic device, and the identification code of the battery is the product serial code of the battery.

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

In a possible implementation, 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 impact on the battery. charging power, specifically including:

When the read first identification information and the second identification information are inconsistent, or when the first identification information is not read and the voltage of the battery is greater than the first voltage value, control all 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, 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 impact on the battery. charging power, specifically including:

When the first identification information is not read, and the voltage of the battery when it starts charging is less than the first voltage value, and the time it takes for the voltage of the battery to drop from the second voltage value to the first voltage value is greater than the preset time When, the electronic device is controlled to charge the battery according to the derated charging mode. The charging power of the derated charging mode is lower than the charging power of the normal charging mode and higher than the lowest 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 first identification information is read as empty data, the electronic device is controlled to charge the battery according to the derating charging mode.

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

In a third aspect, this application also provides an electronic device, which includes the battery protection device provided by the above implementation manner and also includes a battery core. The battery core 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 motherboard of the electronic device. The main control chip and logic chip are powered by battery cells.

The electronic equipment applies 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 on the main control chip. For this 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 for the logic chip. The main control chip can directly reuse 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 practicality. In addition, the battery protection device can also distinguish situations such as battery over-discharge, battery not replaced but communication failure between the main control chip and the logic chip, battery not replaced but short-term power outage, etc., so that the corresponding charging mode can be adopted, which has higher reliability. Practicality further improves the safety of electronic equipment and reduces the risk of accidents.

Description of the drawings

Figure 1 is a schematic structural diagram of an electronic device;

Figure 2 is a schematic diagram of the charging stage;

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

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

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

Figure 6 is a flow chart of another battery protection method provided by an 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 in the technical field 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 solution provided by this application can be applied to electronic devices. The electronic devices can be mobile phones, wearable electronic devices (such as smart watches), tablet computers, augmented reality (AR) devices, and virtual reality (VR) devices. etc., the embodiments of this application are not specifically limited.

Refer to Figure 1, which 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 (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2 , mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, headphone interface 170D, sensor module 180, button 190, motor 191, indicator 192, camera 193, display screen 194, and Subscriber identification module (subscriber identification module, SIM) card interface 195, etc. The sensor module 180 may include a pressure sensor 180A, a gyro 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, and 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 figures, or some components may be combined, some components may be separated, or some components may be arranged differently. The components illustrated may be implemented 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 (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 processing unit (NPU), etc. Among them, different processing units can be independent devices or integrated in one or more processors.

The controller can generate operation control signals based on the instruction operation code and timing signals to complete the control of fetching and executing instructions.

The processor 110 may also be provided with a memory for storing instructions and data. In some embodiments, the memory in processor 110 is cache memory. This memory may hold instructions or data that have been recently used or recycled by processor 110 . If the processor 110 needs to use the instructions 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, 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 the data storage function. Such as saving music, videos, etc. files in external memory card.

Internal memory 121 may be used to store computer executable program code, which includes instructions. The internal memory 121 may include a program storage area and a data storage area. Among them, the stored program area can store an operating system, at least one application program required for a function (such as a sound playback function, an image playback function, etc.). The storage data area may store data created during use of the electronic device 100 (such as audio data, phone book, etc.). In addition, the internal memory 121 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, universal flash storage (UFS), etc. 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 that complies with USB standard specifications, and may specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc. 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 to play audio through them. This interface can also be used to connect other electronic devices, such as AR devices, etc.

It can be understood that the interface connection relationships between the modules illustrated in the embodiment of the present invention are only schematic illustrations and do 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 methods in the above embodiments, or a combination of multiple interface connection methods.

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

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

See Figure 2, which is a schematic diagram of a charging stage.

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

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 equipment adopts the LDO (Low Dropout Regulator, low voltage dropout linear regulator) charging mode, which corresponds to the period between INT0 and INT1 in the figure.

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

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

When the voltage of the battery of the electronic device is less than the precharge charging threshold, the charging device can determine that the charging stage of the battery is a trickle charging stage when charging the electronic equipment.

This application does not limit the precharge charging threshold. The precharge charging threshold can be 2.8V or 3V. Those skilled in the art can select an appropriate precharge charging threshold according to actual needs.

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

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

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

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

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

At present, encryption and anti-counterfeiting integrated ICs are generally used to achieve battery safety protection. When the encryption anti-counterfeiting IC discovers that the current battery of the electronic device is a non-standard battery, the electronic device can reduce the charging power of the battery, for example, use a small current to charge, to reduce safety risks. The encryption and anti-counterfeiting IC used requires a built-in encryption algorithm, which makes the design of the encryption and anti-counterfeiting IC more complex and the hardware cost higher.

In order to solve the above problems, this application provides a battery protection device, a battery protection method and an electronic device. 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 IC. When the standard battery is When replacing a non-standard battery or a low-quality battery, the logic IC power-down information is cleared. If the information does not match after restarting, it can be detected that the battery has been replaced, and the corresponding charging mode is changed. Therefore, this solution can reduce hardware costs while ensuring the safety of battery charging.

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

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

In this application, unless otherwise clearly stated 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 a direct connection. Can be connected indirectly through an intermediary.

Refer to Figure 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 provided on the mainboard 40 of the electronic device and is an important component of the mainboard of the electronic device. In a possible implementation, the main control chip 401 may be a CPU of an electronic device.

The main control chip 401 stores second identification information.

The battery 194 of the electronic device includes a battery protection plate 30 and a battery core 31 . Among them, the battery protection board 31 is mainly an integrated circuit board that protects rechargeable (generally lithium batteries). Since the battery core 31 itself cannot be overcharged, overdischarged, overcurrent, short-circuited or charged and discharged at ultra-high temperatures, the battery core 31 is always paired 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 (PLD), which is an electronic component and, in short, an integrated circuit. The logic chip 301 is a digital type circuit chip. In this 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 without the need for built-in complex encryption algorithms. 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 and the battery are matched at this time, that is, the battery has not been replaced; when When the first identification information does not match the second identification information, it indicates that there is a risk of abnormal power loss of the electronic device at this time, or the battery of the electronic device has been replaced.

The main control chip 401 and the logic chip 301 are electrically connected. The embodiments of the present application do not specifically limit the implementation of electrical connection. For example, the connection can be achieved through a single signal line, or the connection can be achieved through multiple signal lines.

When the electronic device is turned on or starts charging, the main control chip 401 reads the second identification information stored by itself and reads the first identification information stored by the logic chip 301 . The main control chip 401 compares the first identification information and the second identification information. When 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. At this time, the battery can be replaced as normal. 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 electronics and execute a normal charging strategy, for example, high-power fast charging can be used normally.

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

To sum up, 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 the matching relationship between the electronic device and the battery is stored in the main control chip. The matching relationship is also stored on the computer. 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 the safety of battery charging, and has high practicability.

The working principle of the battery protection device will be described below with specific implementation methods.

Refer to Figure 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 also includes a data interface 402 .

When the electronic device 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 based on the identification code of the electronic device, the identification code of the battery and the initial time information.

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

The logic chip 301 and the main control chip 401 are electrically connected to achieve communication. The embodiments of the present application do not specifically limit the implementation of electrical connection. For example, the connection can be achieved through a single signal line, or the connection can be achieved through multiple signal lines.

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

That is, if the battery 194 is replaced, since the ground terminal of the chip 301 is connected to the motherboard 40 through wiring to achieve grounding, the logic chip 301 will be powered off, and the logic chip 301 is configured to clear data when powered off. In other embodiments, the logic chip 301 may also be configured to wait for a certain period of time (for example, a few seconds) before clearing the data when the power is turned off, to eliminate the possibility of clearing the first identification information due to accidental situations such as poor contact.

The identification principle of the battery protection device is explained in detail below.

When the electronic device is turned on or charged through a charging device, the main control chip 401 obtains the stored second identification information. The second identification information is generated based on 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 based on 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.

Wherein, the first identification information and the second identification information match, which 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 the main control chip 401 updated the first identification information and the second identification information, or the last time 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. This is not specifically limited in the 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 the updated third identification code based on 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, the updated second identification information is stored and the updated first identification information is written into the logic chip 301 . In a possible implementation, the first identification information generated by the main control chip 401 is consistent with the data included in the second identification information, but is stored on different devices.

In practical applications, in some embodiments, the main control chip 401 only stores the updated second identification information after the first identification information is successfully written to 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 of 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 at this time. The module reduces the charging power of the battery, which are explained below.

In one possible situation, the battery has been replaced, but the replaced battery is equipped with the logic chip 301 described in this application. However, due to the different identification codes of the batteries, although the logic chip 301 and the main control chip 401 have different 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. At this time, the first identification information read by the main control chip 401 is not empty data.

When the read first identification information and the second identification information are inconsistent, the main control chip 401 controls the charging management module of the electronic device to charge the electronic device according to the lowest charging power supported by the battery device to avoid high-power charging from damaging the battery. This reduces safety risks.

The embodiments of this application do not limit the specific specifications of the minimum charging power, which can be determined according to the actual situation of the electronic device. In addition, when the read first identification information and the second identification information are inconsistent, the main control chip 401 can also record the time of this identification and generate a corresponding log for recording, so as to facilitate 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 installed 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 main control chip 401 controls the charging management module of the electronic device to charge the electronic device according to the lowest charging power supported by the battery device to avoid high power. Charging damages the battery, thereby reducing safety risks.

Among them, the criterion for setting the voltage of the battery to be greater than the first voltage value is because: if the battery has not been replaced and the battery is over-discharged, the logic chip 301 may lose power. At this time, the main control chip 401 cannot read the first identifier. information, causing the logic chip 301 to easily misjudge that the battery has been replaced. In order to avoid this situation, a condition is set that the voltage of the battery is greater than the first voltage value. When the voltage of the battery is greater than the first voltage value, it means that the battery is not over-discharged at this time, thus avoiding misjudgment.

In practical applications, over-discharge of the battery may be caused by the electronic device not being used for a long time and the battery not being charged for a long time, resulting in excessive power consumption.

The embodiments of this application do not limit the specific specifications of the minimum charging power, which can 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 determines 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, the main control chip 401 may determine whether to reduce the charging power of the battery based on whether the electrical connection with the logic chip 301 is normal. When the electrical connection is disconnected, it indicates that there is abnormal power outage behavior at this time. On the one hand, it may be due to battery replacement that causes the electrical connection to be disconnected. On the other hand, it may also be due to water intrusion or impact on the electronic device. If the connection is disconnected, no matter which of the above situations occurs, there are safety risks in using 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 main control chip 401 is electrically disconnected from the logic chip 301, it can also record the time of this identification and generate a corresponding log for recording to facilitate subsequent equipment maintenance.

In 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 been idle for a long time without charging the battery. At this time, the main control chip 401 has not obtained the first identification information. . The solution of this application is to identify this situation and avoid misjudgment of battery replacement. When the logic chip does not read the first identification information, and the voltage when the battery starts charging is less than the first voltage value, and the battery voltage is changed from the second voltage When the time taken for the voltage to drop 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.

This application does not specifically limit the first voltage value, the second voltage value and the preset time. 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 can be set to 2.6V, and the second voltage value can be set to 3.6V. When the voltage of the battery is lower than the first voltage value, it means that the battery voltage 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 device in advance. In practical applications, the main control chip 401 can determine the time it takes for the battery voltage to drop from the second voltage value to the first voltage value from the latest log of the electronic device.

The embodiments of this application do not limit the specific specifications of the derated charging mode. The charging power in the derated charging mode is lower than the charging power in 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 and not replaced in this case, the charging power in the derated charging mode can be set to be slightly smaller than the charging power in the normal charging mode.

In addition, the main control chip 401 can record the time of this recognition and generate corresponding logs for recording to facilitate subsequent equipment maintenance.

In another possible implementation, the battery of the electronic device has not been replaced, but due to an accidental drop or collision, or a brief disassembly during maintenance, the logic chip 301 loses power, and the first stored value on the logic chip 301 is lost. The identification information is cleared, and then the logic chip 301 is powered on normally, and the normal connection with the main control chip 401 is restored. In order to recognize this situation, when the electrical connection between the main control chip 401 and the logic chip 301 is normal, but the first identification information is read as empty data, the charging management module of the electronic device is controlled to charge the battery according to the derated charging mode. Charge.

In addition, the main control chip 401 can record the time of this recognition and generate corresponding logs for recording to facilitate subsequent equipment maintenance.

The device mainboard 40 in the embodiment of the present application also includes a data interface 402. The production line or maintenance point of electronic equipment can connect the data interface to external equipment. The main control chip 401 authenticates the external device to determine whether the external device is compliant and whether it is an official device. After the external device is authenticated, the external device can control, 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 updates to the logic chip. The first identification information after.

When an external device is connected to the production line, the identification information stored on the main control chip 401 and the logic chip 301 can be initialized and set; when the maintenance point connects an external device, the data stored on the logic chip 301 can be set through the main control chip 401. 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 to connect the main control chip 401 and the logic chip Update the corresponding identification information on 301.

In addition, for the following two situations, you can also connect an external device to the data interface 402 and update the corresponding identification information on the main control chip 401 and the logic chip 301 again, 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, or brief disassembly during maintenance, the logic chip loses power, and the first identification information stored on the logic chip is cleared, and then the logic chip Power on normally and resume 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 situations, since the battery is not actually replaced, the normal charging mode of the battery can be restored.

To sum up, 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 the matching relationship between the electronic device and the battery is stored in the main control chip. The matching relationship is also stored on the computer. 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 the safety of battery charging, and has high practicability. In addition, the battery protection device can also distinguish situations such as battery over-discharge, battery not replaced but communication failure between the main control chip and the logic chip, battery not replaced but short-term power outage, etc., so that the corresponding charging mode can be adopted, which has higher reliability. 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, this application also provides a battery protection method, which will be described in detail below with reference to the accompanying drawings.

Refer to Figure 5, which is a flow chart of a battery protection method provided by an embodiment of the present application.

This method is applied to the main control chip of the electronic device. The main control chip stores the second identification information. The main control chip can read the first identification information stored in the logic chip. For the specific implementation methods of the main control chip and the logic chip, please refer to the above. The descriptions in the embodiments 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 charging, the main control chip reads the second identification information stored by itself and reads the first identification information stored by 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 and the battery are matched at this time, that is, the battery has not been replaced; when When the first identification information does not match the second identification information, it indicates that there is a risk of abnormal power loss of the electronic device at this time, or the battery of the electronic device has been replaced.

S102: When the first identification information matches the second identification information, 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 the normal charging mode for the electronics and implement the normal charging strategy. For example, high-power fast charging can be used normally.

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 when the first identification information is not read, it means that the battery of the electronic device may be replaced at this time. In order to avoid safety hazards, The main control chip controls the charging management module of the electronic device to reduce the charging power of the battery.

The following describes the specific implementation method.

Refer to Figure 6, which 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 based on 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 to the logic chip.

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

The identification code of the electronic device is the product serial code of the electronic device, 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 the normal charging mode for the electronics and implement the normal charging strategy. For example, high-power fast charging can be used normally.

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 before the electronic device is turned on or before charging is started is greater than the first voltage value, it indicates that the battery of the electronic device is not over-discharged at this time, and it is determined that the battery replacement may have occurred 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 voltage of the battery is lower than the first voltage value, it means that the battery voltage is too low at this time and over-discharge may occur.

S208: Whether the time it takes for the battery voltage to drop from the second voltage value to the first voltage value is greater than the preset time.

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

When the time it takes 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 judged that the battery may have been replaced.

When the time it takes for the battery voltage to drop from the second voltage value to the first voltage value is greater than the preset time, it means that the electronic device has been idle for a long time without charging the battery, resulting in low battery voltage and possibly over-discharge. The preset time can be determined by performing an idle test on the electronic device in advance.

In practical applications, the time it takes for the voltage of the battery to drop from the second voltage value to the first voltage value can be determined from a recent log of the electronic device.

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

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

When the first identification information is empty data, it means 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 brief disassembly during maintenance, the logic chip loses power. 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.

When the first identification information is not empty data, it means that the following situation may occur at this time: the battery has been replaced, but the replaced battery is equipped with the logic chip described in this application, 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 derated charging mode.

The embodiments of this application do not limit the specific specifications of the derated charging mode. The charging power in the derated charging mode is lower than the charging power in 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 derated charging mode can be set to be slightly smaller than the charging power in the normal charging mode.

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

The charging management module that controls the electronic device charges the electronic device according to the lowest charging power supported by the battery device to avoid high-power charging from damaging the battery, thereby reducing potential safety hazards.

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

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

Connect external devices through the data interface and authenticate the external devices;

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 to 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 and set; when the maintenance point connects external equipment, the data stored on the logic chip can be updated through the main control chip, and the data stored on the logic chip can be updated through the main control chip. 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, which 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 situations, since the battery of the electronic device has not been replaced, you can also connect the external device through the data interface and update the corresponding identification information on the main control chip and logic chip again, so that the charging management module of the electronic device can Use normal charging mode for the battery:

1. The battery of the electronic device has not been replaced, but due to accidental drop or collision, or brief disassembly during maintenance, the logic chip loses power, and the first identification information stored on the logic chip is cleared, and then the logic chip Power on normally and resume 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 has been damaged. replace. This method 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 the safety of battery charging, and has high practicability. In addition, this method can also distinguish situations where the battery is over-discharged, the battery has not been replaced but there is a communication failure between the main control chip and the logic chip, the battery has not been replaced but there is a brief power outage, etc., so that the corresponding charging mode can be adopted, which is highly practical. , further improving the safety of electronic equipment and reducing the risk of accidents.

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

Refer to Figure 7, which is a schematic diagram of an electronic device provided by an embodiment of the present application.

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

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 motherboard 40 of the electronic device 70 .

Regarding the specific implementation and working principles of the logic chip 301 and the main control chip 401, please refer to the relevant descriptions in the above embodiments, and the embodiments of the present application will not be repeated here.

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

Battery 194 is used to power electronic device 70 .

In some embodiments, the main control chip also includes a data interface 402, which is connected to the external interface on the motherboard 40 through wires. When the external interface on the motherboard 40 is connected to an external device, that is, the data interface 402 is connected to the external device. The embodiments of the present application do not specifically limit the type of external device, for example, it may be a mobile phone, a tablet, a PC or a laptop, etc.

The production line or maintenance point of electronic equipment can connect the data interface to external equipment. The main control chip 401 authenticates the external device to determine whether the external device is compliant and whether it is an official device. After the external device is authenticated, the external device can control, 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 updates to the logic chip. The first identification information after.

When an external device is connected to the production line, the identification information stored on the main control chip 401 and the logic chip 301 can be initialized and set; when the maintenance point connects an external device, the data stored on the logic chip 301 can be set through the main control chip 401. 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 to connect the main control chip 401 and the logic chip Update the corresponding identification information on 301.

In addition, for the following two situations, you can also connect an external device to the data interface 402 and update the corresponding identification information on the main control chip 401 and the logic chip 301 again, 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, or brief disassembly during maintenance, the logic chip loses power, and the first identification information stored on the logic chip is cleared, and then the logic chip Power on normally and resume 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 normally.

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

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

To sum up, this electronic device applies 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 device and the battery on the logic chip, and in the host computer. 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 for the logic chip. The main control chip can directly reuse 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 practicality. In addition, the battery protection device can also distinguish situations such as battery over-discharge, battery not replaced but communication failure between the main control chip and the logic chip, battery not replaced but short-term power outage, etc., so that the corresponding charging mode can be adopted, which has higher reliability. 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)" refers to one or more, and "plurality" refers to two or more. "And/or" is used to describe the relationship between associated objects, indicating that there can be three relationships. For example, "A and/or B" can mean: only A exists, only B exists, and A and B exist simultaneously. , where A and B can be singular or plural.

As mentioned above, the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still make the foregoing technical solutions. The technical solutions described in each embodiment may be modified, or some of the technical features may be equivalently replaced; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions in each embodiment of the present application.

Claims (17)

1. A battery protection device, characterized in that is provided in an electronic apparatus, a battery of the electronic apparatus includes a battery cell and a battery protection board, the 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; 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; and when the first identification information is not read, the voltage of the battery when the battery starts to be charged is smaller than a first voltage value, and the time when the voltage of the battery is reduced from a second voltage value to the first voltage value is longer than a preset time, the electronic equipment is controlled to charge the battery according to a 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 lowest charging power supported by the electronic equipment, and the second voltage value is larger than the first voltage value.

2. The battery protection device according to claim 1, wherein the main control chip is specifically configured to generate updated first identification information and updated second identification information according to a current time, an identification code of the electronic device, and an identification code of the battery when the first identification information matches the second identification information, store the updated second identification information, and write the updated first identification information into the logic chip.

3. The battery protection device of 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 disposed on a motherboard of the electronic apparatus;

the grounding end of the logic chip is used for being grounded through the main board;

and when the grounding end of the logic chip is disconnected with the main board, 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 control the electronic device to charge the battery according to a minimum charging power supported by the electronic device when the read first identification information and the read second identification information are inconsistent, or when the first identification information is not read and the voltage of the battery is greater than a first voltage value.

6. The battery protection device of claim 5, wherein the main control chip is further configured to control the electronic device to charge the battery according to a minimum charging power supported by the electronic device when the main control chip is electrically disconnected from the logic chip.

7. The battery protection device of claim 4, wherein the main control chip is further configured to control the electronic device to charge the battery according to the derating charging mode when the electrical connection with the logic chip is normal, but the first identification information is read as null data.

8. The battery protection device according to any one of claims 1 to 7, wherein the main control chip further comprises a data interface thereon;

the data interface is used for connecting with external equipment;

the main control chip is also used for authenticating the external equipment, storing the updated second identification information under the control of the external equipment after the authentication is passed, and writing the updated first identification information into the logic chip.

9. The battery protection method is characterized by being applied to a main control chip of electronic equipment, wherein the main control chip stores second identification information, and the method comprises the following steps:

reading first identification information stored by a logic chip, wherein the logic chip is electrically connected with the main control chip and is positioned on a battery protection board;

when the first identification information is matched with the second identification information, the electronic equipment is controlled to charge the battery according to a normal charging mode;

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;

when the first identification information is not read, the voltage of the battery when the battery starts to be charged is smaller than a first voltage value, and the time when the voltage of the battery is reduced from a second voltage value to the first voltage value is longer than a preset time, the electronic equipment is controlled to charge the battery according to a derating charging mode, the charging power of the derating charging mode is lower than the charging power of the normal charging mode and is higher than the lowest charging power supported by the electronic equipment, and the second voltage value is larger than the first voltage value.

10. The battery protection method according to claim 9, 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, specifically comprising:

when the first identification information is matched with the second identification information, generating updated first identification information and updated second identification information according to the current time, the identification code of the electronic equipment and the identification code of the battery;

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

and controlling the electronic equipment to charge the battery according to a normal charging mode.

11. The battery protection method of claim 10, 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.

12. The battery protection method according to claim 10, wherein the main control chip is disposed on a motherboard of the electronic device; the grounding end of the logic chip is grounded through the main board; and when the grounding end of the logic chip is disconnected with the main board, the stored first identification information is cleared.

13. The method according to claim 12, wherein when the first identification information does not match the second identification information or the first identification information is not read, controlling the electronic device to reduce the charging power of the battery specifically includes:

and 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 larger than a first voltage value, controlling the electronic equipment to charge the battery according to the lowest charging power supported by the electronic equipment.

14. The battery protection method according to claim 13, characterized in that the method further comprises:

and when the electric connection between the electronic equipment and the logic chip is disconnected, controlling the electronic equipment to charge the battery according to the lowest charging power supported by the electronic equipment.

15. The battery protection method according to claim 13, characterized in that the method further comprises:

and when the electrical connection between the electronic device and the logic chip is normal, but the first identification information is read to be null data, controlling the electronic device to charge the battery according to the derating charging mode.

16. The battery protection method according to any one of claims 9 to 15, characterized in that the method further comprises:

connecting external equipment through a data interface, and authenticating the external equipment;

and after the authentication is passed, storing the updated second identification information under the control of the external equipment, and writing the updated first identification information into the logic chip.

17. An electronic device, characterized in that it comprises the battery protection device of any one of claims 1-8, further comprising a battery cell;

The battery cell and the battery protection plate form the battery;

the battery is used for supplying power to the electronic equipment.