BMS board automatic wake-up and serial port communication system

Abstract

The invention discloses a BMS board automatic wake-up and serial port communication system, and relates to the technical field of battery management, and the system comprises a charging control module, the charging control module is connected with an energy storage cell, and the charging control module is used for a BMS board external adapter power supply to charge the energy storage cell; the discharge control module is connected with the energy storage battery cell, and the discharge control module is used for the energy storage battery cell to provide a power supply for an external load of the BMS board; and the MCU actively triggers an alarm event for reporting a preset battery cell temperature and an electric quantity threshold value to the main control platform upper computer in real time through a communication serial port, and executes an instruction issued by the main control platform upper computer to the MCU. According to the method, current sampling is carried out when the polymer lithium battery is charged and discharged, voltage conversion differential amplification is carried out, the voltage is compared with the preset voltage threshold value, and the comparison result value is used for judging whether the MCU in low-power-consumption dormancy is activated to be automatically awakened and recovered to the working state or not, so that the purpose that the MCU of the BMS board takes electricity from a battery cell to reduce energy consumption is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of battery management, in particular to a BMS board automatic wake-up and serial port communication system. Background Art

[0002] Battery Management System is a battery management system, or BMS for short. The basic management functions of BMS include: battery overvoltage, overdischarge, overcurrent, overtemperature, low temperature, short circuit, power capacity, etc. The control unit, MCU, as the core of BMS manages the basic functional status of the above-mentioned battery during charging and discharging. Traditionally, the core control unit MCU of the BMS board of lithium battery-powered equipment in shutdown or standby mode still runs in the working state and consumes huge battery power. Therefore, the capacity loss of a small part of the battery causes the increase of power consumption of the lithium battery-powered equipment and the reduction of the use time of the equipment itself on the BMS board, which increases the number of battery charging cycles and reduces the battery life.

[0003] Therefore, when the lithium battery powered equipment is shut down or in standby mode, while the BMS board is powered, the core control unit MCU of the BMS board automatically enters the micro-ampere sleep mode from the milliampere working state as needed, which can effectively and greatly reduce the power consumption of the BMS board from the energy storage battery. By using the standard 3.3V TTL level three-wire signal serial port, it can be easily integrated and expanded into an RS232 level or RS485 level interface to connect to the remote main control platform host computer, actively trigger and report alarm events and passively receive and query battery status information, such as actively reporting over-temperature and over-charging events, and passively querying voltage, current, temperature, remaining power, number of charge and discharge cycles, etc. Summary of the invention

[0004] In view of the problems existing in the existing BMS board automatic wake-up and serial port communication and system, the present invention is proposed.

[0005] Therefore, the problem to be solved by the present invention is.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a BMS board automatic wake-up and serial port communication system, which includes:

[0008] A charging control module, the charging control module is connected to the energy storage cell, the charging control module is used for charging the energy storage cell with an external adapter power supply of the BMS board, and the charging state is controlled by the MCU;

[0009] A discharge control module, the discharge control module is connected to the energy storage cell, and the discharge control module is used for the energy storage cell to provide power to the external load of the BMS board, and the power supply state is controlled by the MCU;

[0010] MCU, the MCU actively triggers and reports alarm events of preset cell temperature and power thresholds to the host computer of the main control platform in real time through the communication serial port, and executes the instructions issued by the host computer of the main control platform to the MCU;

[0011] The current sampling module is connected to the negative end of the energy storage cell. The current sampling module samples the current during charging and discharging to determine whether the MCU in low-power sleep mode is automatically awakened.

[0012] As a preferred solution of the BMS board automatic wake-up and serial communication system of the present invention, the communication serial port adopts a standard 3.3V TTL level three-wire signal serial port.

[0013] As a preferred solution of the BMS board automatic wake-up and serial communication system of the present invention, it also includes a differential operational amplifier circuit;

[0014] The differential operational amplifier circuit includes a resistor R22, a resistor R28, a resistor R31, a resistor R27, an operational amplifier U5, a resistor R33, a resistor R29, and a ceramic capacitor C13 which are respectively connected to the MCU main control chip U6.

[0015] As a preferred solution of the BMS board automatic wake-up and serial communication system of the present invention, it also includes a BUCK step-down circuit;

[0016] The BUCK step-down circuit includes an electrolytic capacitor CE1, a ceramic capacitor C2, a ceramic capacitor C3, a resistor R1, an NPN transistor Q1, a resistor R6, a resistor R7, a polymer lithium battery management chip U1, a resistor R2, a resistor R3, a light-emitting diode D1, a ceramic capacitor C1, a resistor R5, a ceramic capacitor C6, a power inductor L1, a resistor R4, an electrolytic capacitor CE2, a ceramic capacitor C4, and a ceramic capacitor C5, which are respectively connected to the MCU main control chip U6.

[0017] As a preferred solution of the BMS board automatic wake-up and serial communication system of the present invention, it also includes a serial communication protocol, wherein;

[0018] The serial communication protocol includes at least 12 bytes of data, including 1 byte of frame header, 2 bytes of battery voltage value, 2 bytes of discharge current, 2 bytes of battery cell temperature, 1 byte of battery capacity percentage SOC, 1 byte of battery health percentage SOH, 2 bytes of battery working status, and 1 byte of CRC check code;

[0019] The 2-byte battery operating status includes overvoltage flag, charging overtemperature flag, over-discharge flag, discharging overtemperature flag, charging termination flag, discharging termination flag, charging completion flag, remaining capacity flag, charging and discharging flag, full charging flag, full discharge flag, charging time flag, discharging time flag, charging number flag, and discharging number flag.

[0020] As a preferred solution of the BMS board automatic wake-up and serial communication system of the present invention, it also includes a power management PMU,

[0021] The power management PMU obtains power from the energy storage cell or external adapter to provide an uninterruptible power supply UPS.

[0022] As a preferred solution of the BMS board automatic wake-up and serial communication system of the present invention, the differential operational amplification factor formula of the differential operational amplifier circuit is specifically as follows:

[0023]

[0024] The formula for the minimum level of the MCU pin interrupt trigger is expressed as:

[0025] U IH =0.41(V DD -1.8)+1.3;

[0026] Where U o Expressed as output voltage, U i1 and U i2 Respectively represented as input voltage 1 and input voltage 2, U ref Expressed as reference voltage, U IH Indicates the minimum level of the interrupt trigger of the MCU pin, V DD Indicates the power supply voltage of the MCU.

[0027] As a preferred solution of the BMS board automatic wake-up and serial communication system of the present invention, it includes an analysis module, a judgment module, and an output module;

[0028] The analysis module is used to analyze and identify current information and voltage information;

[0029] The judgment module is used to judge the calculated value;

[0030] The output module is used to output whether the MCU is awakened and restored to a working state.

[0031] In a second aspect, an embodiment of the present invention provides a computer device, including a memory and a processor, wherein the memory stores a computer program, wherein: when the processor executes the computer program, the above-mentioned BMS board automatic wake-up and serial port communication system are implemented.

[0032] In a third aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein: when the computer program is executed by a processor, the above-mentioned BMS board automatic wake-up and serial port communication system is implemented.

[0033] The beneficial effects of the present invention are:

[0034] By sampling the current of the polymer lithium battery during charging and discharging, performing voltage conversion differential amplification and comparing it with the preset voltage threshold, the comparison result value is used to determine whether the MCU in low-power sleep mode is automatically awakened and restored to the working state, thereby achieving the purpose of reducing energy consumption by drawing power from the battery cell for the BMS board MCU.

[0035] By using the standard 3.3V TTL level three-wire signal serial port, it is low-cost and easy to develop quickly. It can be easily integrated into the main control platform equipment, and can also be easily expanded into an RS232 level serial port or RS485 level serial port for remote anti-interference output. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0037] Figure 1 This is the structural diagram of the BMS board automatic wake-up and serial communication system.

[0038] Figure 2 This is the working connection diagram of the BMS board automatic wake-up and serial communication system.

[0039] Figure 3 This is the MCU sleep and wake-up flow chart for the automatic wake-up of the BMS board and the serial communication system.

[0040] Figure 4 This is the circuit schematic of the current sampling unit of the BMS board automatic wake-up and serial communication system.

[0041] Figure 5 This is the circuit schematic diagram of the charging control unit for the BMS board automatic wake-up and serial communication system.

[0042] Figure 6This is the circuit schematic diagram of the discharge control unit of the BMS board automatic wake-up and serial communication system.

[0043] Figure 7 This is the circuit schematic diagram of the power and temperature collection unit of the BMS board automatic wake-up and serial communication system.

[0044] Figure 8 This is the circuit schematic diagram of the MCU and communication serial port unit of the BMS board automatic wake-up and serial communication system.

[0045] Fig. 9 The schematic diagram of the uninterruptible power supply UPS circuit for the power management PMU of the BMS board automatic wake-up and serial communication system. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0047] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0048] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0049] The present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0050] At the same time, in the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper, lower, inner and outer" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "install, connect, connect" should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Example 1

[0053] Reference Figures 1 to 9 , which is the first embodiment of the present invention, and provides a BMS board automatic wake-up and serial port communication system, including:

[0054] A charging control module, the charging control module is connected to the energy storage cell, the charging control module is used for charging the energy storage cell with an external adapter power supply of the BMS board, and the charging state is controlled by the MCU;

[0055] A discharge control module, the discharge control module is connected to the energy storage cell, and the discharge control module is used for the energy storage cell to provide power to the external load of the BMS board, and the power supply state is controlled by the MCU;

[0056] MCU, the MCU actively triggers and reports alarm events of preset cell temperature and power thresholds to the host computer of the main control platform in real time through the communication serial port, and executes the instructions issued by the host computer of the main control platform to the MCU;

[0057] The communication serial port adopts the standard 3.3V TTL level three-wire signal serial port;

[0058] The current sampling module is connected to the negative end of the energy storage cell. The current sampling module samples the current during charging and discharging to determine whether the MCU in low-power sleep mode is automatically awakened.

[0059] There is also a current sampling device connected to the negative end of the energy storage cell. During charging and discharging, the current sampling is used to automatically wake up the MCU in low-power sleep mode.

[0060] Overcharge, over-discharge and over-current protection connects the positive and negative ends of the energy storage cell to achieve real-time detection and protection of voltage and current during charging and discharging;

[0061] The power and temperature collection is connected to the MCU via the I2C bus to collect the battery cell power and temperature, and actively report alarm events when the preset battery cell power and temperature thresholds are triggered.

[0062] like Figure 2 As shown, the BMS board is connected to the peripherals: the external adapter charges the BMS board through the charging port; the BMS board provides power to the external load through the discharge port; the BMS board communicates and interacts with the host computer of the main control platform through the serial port.

[0063] like Figure 3 As shown in the figure, the flow chart of activating the MCU in low-power sleep mode is as follows. When in charging mode or charging-to-discharging mode, the BMS board MCU is directly activated and woken up; when in discharging mode, the current is sampled, and then the voltage is converted and differentially amplified and compared with the preset voltage threshold. If it is greater than the preset threshold, the MCU is automatically activated, otherwise the MCU enters a low-power sleep state.

[0064] Also included is a differential operational amplifier circuit;

[0065] The differential operational amplifier circuit includes a resistor R22, a resistor R28, a resistor R31, a resistor R27, an operational amplifier U5, a resistor R33, a resistor R29, and a ceramic capacitor C13, which are respectively connected to the MCU main control chip U6;

[0066] like Figure 4 As shown, a differential operational amplifier circuit is formed by the budget amplifier U5 and resistors R28, R31, R27, and R33. The operational amplifier multiple is determined by the resistance value of the current sampling resistor R22, the current threshold when the load enters the shutdown mode or standby mode in the preset discharge mode, and the interrupt trigger level of the MCU chip U6 pin PA0.

[0067] The differential operational amplifier circuit differential operational amplifier formula is as follows:

[0068]

[0069] The formula for the minimum level of the MCU pin interrupt trigger is expressed as:

[0070] U IH =0.41(V DD -1.8)+1.3;

[0071] Where U o Expressed as output voltage, U i1 and U i2Respectively represented as input voltage 1 and input voltage 2, U ref Expressed as reference voltage, U IH Indicates the minimum level of the interrupt trigger of the MCU pin, V DD Represents the power supply voltage of MCU;

[0072] According to the calculation result and the current threshold when the load enters the shutdown mode or the standby mode in the preset discharge mode and the resistance value of the sampling resistor R22, the required minimum amplification factor, that is, the resistance values ​​of the resistors R33 and R31, can be calculated.

[0073] It also includes BUCK step-down circuit;

[0074] The BUCK step-down circuit includes an electrolytic capacitor CE1, a ceramic capacitor C2, a ceramic capacitor C3, a resistor R1, an NPN transistor Q1, a resistor R6, a resistor R7, a polymer lithium battery management chip U1, a resistor R2, a resistor R3, a light-emitting diode D1, a ceramic capacitor C1, a resistor R5, a ceramic capacitor C6, a power inductor L1, a resistor R4, an electrolytic capacitor CE2, a ceramic capacitor C4, and a ceramic capacitor C5, which are respectively connected to the MCU main control chip U6.

[0075] like Figure 5 As shown, the 12V adapter power is provided through the charging port to charge 2 strings of lithium batteries. The power management chip U1 adopts a current mode PWM step-down switch control structure, has a constant current and constant voltage charging mode, has overcharge, overcurrent and overtemperature detection functions, supports sleep and automatic recharging and anti-backflow functions. By default and in MCU sleep mode, the power management chip U1 enable pin 3 is at a high level to turn on the charging function. At the same time, the power management chip U1 can be turned off by the high level conduction NPN transistor through the power sampling and temperature sampling units through the MCU pin PB3. In the constant current charging mode, the charging current is set by the external detection resistor R4 and a 100mV reference voltage inside the chip.

[0076] I o (A) = 100mV / R4 (mΩ).

[0077] like Figure 6 As shown, the PMOS tube Q4 provides 2 series voltage discharge main power supply channels. By default, the BMS board discharges to the outside, and the discharge function can be turned off through the NMOS tube Q5.

[0078] like Figure 7As shown, in the circuit schematic diagram of the power and temperature acquisition unit in the present invention, the power meter chip U3 continuously samples the charge and discharge current and cycle times of the energy storage cell through pins 7 and 8, continuously monitors the voltage of the energy storage cell through pin 4, connects an NTC resistor to the energy storage cell through pin 9 to collect the real-time temperature of the energy storage cell, and presets and queries the cell voltage, current, temperature, etc. through the I2C bus of pins 10 and 11.

[0079] Also included is a serial communication protocol, wherein;

[0080] The serial communication protocol includes at least 12 bytes of data, including 1 byte of frame header, 2 bytes of battery voltage value, 2 bytes of discharge current, 2 bytes of battery cell temperature, 1 byte of battery capacity percentage SOC, 1 byte of battery health percentage SOH, 2 bytes of battery working status, and 1 byte of CRC check code;

[0081] The 2-byte battery operating status includes an overvoltage flag, a charging overtemperature flag, an overdischarge flag, a discharging overtemperature flag, a charging termination flag, a discharging termination flag, a charging completion flag, a remaining capacity flag, a charging and discharging flag, a full charge flag, a full discharge flag, a charging duration flag, a discharging duration flag, a charging number flag, and a discharging number flag;

[0082] like Figure 8 As shown, in the circuit schematic diagram of the MCU and the communication serial port unit in the present invention, the single-chip MCU chip U6 has an ultra-low power consumption mode, supports a pin interrupt wake-up function, and uses a TTL 3.3V level serial port to communicate with a remote host computer platform through a connector J3.

[0083] Also includes power management PMU,

[0084] The power management PMU obtains the power of the energy storage cell or the external adapter power and is used to provide an uninterruptible power supply UPS

[0085] like Fig. 9 As shown in the circuit schematic diagram of the uninterruptible power supply UPS of the power management PMU in the present invention, the linear power chip LDO has the characteristics of large output current, low voltage difference, low quiescent current and shutdown current, etc. As the input end of the uninterruptible power supply UPS, it directly draws power from the energy storage cell and the external adapter power supply to ensure that the output power supply 3V3_PMU is long-term and uninterrupted.

[0086] In summary, by sampling the current of the polymer lithium battery during charging and discharging, performing voltage conversion differential amplification and comparing it with the preset voltage threshold, the comparison result value is used to determine whether the MCU in low-power sleep mode is automatically awakened and restored to the working state, thereby achieving the purpose of reducing energy consumption by allowing the BMS board MCU to draw power from the battery cell.

[0087] By using the standard 3.3V TTL level three-wire signal serial port, it is low-cost and easy to develop quickly. It can be easily integrated into the main control platform equipment, and can also be easily expanded into an RS232 level serial port or RS485 level serial port for remote anti-interference output.

[0088] Example 2

[0089] On the basis of the first embodiment, this embodiment further provides a BMS board automatic wake-up and serial communication system, including an analysis module, a judgment module, and an output module;

[0090] The analysis module is used to analyze and identify current information and voltage information;

[0091] The judgment module is used to judge the calculated value;

[0092] The output module is used to output whether the MCU is awakened and restored to a working state.

[0093] This embodiment also provides a computer device, which is suitable for the case of automatic wake-up of the BMS board and the serial port communication system, including a memory and a processor; the memory is used to store computer executable instructions, and the processor is used to execute the computer executable instructions to implement the automatic wake-up of the BMS board and the serial port communication system proposed in the above embodiment.

[0094] The computer device may be a terminal, and the computer device includes a processor, a memory, a communication interface, a display screen and an input device connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. The display screen of the computer device may be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device may be a touch layer covering the display screen, or a key, trackball or touchpad provided on the housing of the computer device, or an external keyboard, touchpad or mouse, etc.

[0095] This embodiment also provides a storage medium on which a computer program is stored. When the program is executed by a processor, the automatic wake-up of the BMS board and the serial port communication system proposed in the above embodiment are implemented.

[0096] The storage medium proposed in this embodiment and the data storage system proposed in the above embodiment belong to the same inventive concept. The technical details not fully described in this embodiment can be found in the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0097] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A BMS board automatic wake-up and serial communication system, characterized by: include, A charging control module, the charging control module is connected to the energy storage cell, the charging control module is used for charging the energy storage cell with an external adapter power supply of the BMS board, and the charging state is controlled by the MCU; A discharge control module, the discharge control module is connected to the energy storage cell, and the discharge control module is used for the energy storage cell to provide power to the external load of the BMS board, and the power supply state is controlled by the MCU; MCU, the MCU actively triggers and reports alarm events of preset cell temperature and power thresholds to the host computer of the main control platform in real time through the communication serial port, and executes the instructions issued by the host computer of the main control platform to the MCU; The current sampling module is connected to the negative end of the energy storage cell. The current sampling module samples the current during charging and discharging to determine whether the MCU in low-power sleep mode is automatically awakened.

2. The BMS board automatic wake-up and serial communication system according to claim 1, characterized in that: The communication serial port adopts a standard 3.3V TTL level three-wire signal serial port.

3. The BMS board automatic wake-up and serial communication system as claimed in claim 2, characterized in that: Also included is a differential operational amplifier circuit; The differential operational amplifier circuit includes a resistor R22, a resistor R28, a resistor R31, a resistor R27, an operational amplifier U5, a resistor R33, a resistor R29, and a ceramic capacitor C13 which are respectively connected to the MCU main control chip U6.

4. The BMS board automatic wake-up and serial communication system as claimed in claim 3, characterized in that: It also includes BUCK step-down circuit; The BUCK step-down circuit includes an electrolytic capacitor CE1, a ceramic capacitor C2, a ceramic capacitor C3, a resistor R1, an NPN transistor Q1, a resistor R6, a resistor R7, a polymer lithium battery management chip U1, a resistor R2, a resistor R3, a light-emitting diode D1, a ceramic capacitor C1, a resistor R5, a ceramic capacitor C6, a power inductor L1, a resistor R4, an electrolytic capacitor CE2, a ceramic capacitor C4, and a ceramic capacitor C5, which are respectively connected to the MCU main control chip U6.

5. The BMS board automatic wake-up and serial communication system as claimed in claim 4, characterized in that: Also included is a serial communication protocol, wherein; The serial communication protocol includes at least 12 bytes of data, including 1 byte of frame header, 2 bytes of battery voltage value, 2 bytes of discharge current, 2 bytes of battery cell temperature, 1 byte of battery capacity percentage SOC, 1 byte of battery health percentage SOH, 2 bytes of battery working status, and 1 byte of CRC check code; The 2-byte battery operating status includes overvoltage flag, charging overtemperature flag, over-discharge flag, discharging overtemperature flag, charging termination flag, discharging termination flag, charging completion flag, remaining capacity flag, charging and discharging flag, full charging flag, full discharge flag, charging time flag, discharging time flag, charging number flag, and discharging number flag.

6. The BMS board automatic wake-up and serial communication system as claimed in claim 5, characterized in that: Also includes power management PMU, The power management PMU obtains power from the energy storage cell or external adapter to provide an uninterruptible power supply UPS.

7. The BMS board automatic wake-up and serial port communication system according to claim 6, characterized in that: The differential operational amplification factor formula of the differential operational amplifier circuit is specifically: The formula for the minimum level of the MCU pin interrupt trigger is expressed as: U IH =0.41(V DD -1.8)+1.3; Where U o Expressed as output voltage, U i1 and U i2 Respectively represented as input voltage 1 and input voltage 2, U ref Expressed as reference voltage, U IH Indicates the minimum level of the interrupt trigger of the MCU pin, V DD Indicates the power supply voltage of the MCU.

8. The BMS board automatic wake-up and serial communication system according to any one of claims 1 to 7, comprising an analysis module, a judgment module, and an output module; The analysis module is used to analyze and identify current information and voltage information; The judgment module is used to judge the calculated value; The output module is used to output whether the MCU is awakened and restored to a working state.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the BMS board automatic wake-up and serial port communication system described in claim 8 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, the BMS board automatic wake-up and serial port communication system described in claim 8 is implemented.

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