A wake-up sleep circuit for a battery management system

Abstract

The application discloses a kind of wake-up hibernation circuits of battery management system, it includes master module, DC-DC conversion module, power switch module and hardware watchdog module;The hardware watchdog module monitors whether master module is normal work;If master module is normal work, then hardware watchdog module controls power switch module to turn on and makes DC-DC conversion module work, in turn makes master module keep energized work;And if master module is not normal work, then hardware watchdog module controls power switch module to close and controls DC-DC conversion module to stop work, in turn makes master module power off and shut down.The application can automatically shut down when master module crashes, to protect power safety.

Description

Technical Field

[0001] This invention relates to the field of battery management systems, and in particular to a wake-up and sleep circuit for a battery management system. Background Technology

[0002] A battery management system (BMS) is a device used to monitor and manage batteries, ensuring their stability and safety.

[0003] Existing battery management systems, specifically the main control module of the battery management system, cannot effectively protect and shut down the power output when it crashes, thus failing to protect electrical safety and posing certain safety hazards.

[0004] In view of the above problems, it is necessary to study a wake-up and hibernation circuit for a battery management system, which can automatically shut down the main control module when it crashes, thereby protecting electrical safety. Summary of the Invention

[0005] The purpose of this invention is to provide a wake-up and hibernation circuit for a battery management system, which can automatically shut down the main control module when it crashes, thereby protecting electrical safety.

[0006] To achieve the above objectives, the solution of the present invention is:

[0007] A wake-up and hibernation circuit for a battery management system includes a main control module, a DC-DC converter module, a power switch module, and a hardware watchdog module. The power switch module has an enable signal SW-EN connected to its input terminal, its output terminal connected to the enable terminal of the DC-DC converter module, its control terminal connected to the output terminal of the hardware watchdog module, and its input terminal connected to one output terminal of the main control module. The main control module's power supply terminal is connected to the output terminal of the DC-DC converter module. The hardware watchdog module monitors whether the main control module is working properly. If the main control module is working properly, the hardware watchdog module controls the power switch module to turn on, enabling the DC-DC converter module to operate, thus keeping the main control module powered on. If the main control module is not working properly, the hardware watchdog module controls the power switch module to turn off, controlling the DC-DC converter module to stop operating, thus powering down the main control module.

[0008] When the main control module is working normally, it continuously outputs a PWM signal to the hardware watchdog module. The hardware watchdog module detects whether the main control module continuously outputs a PWM signal. If the main control module continuously outputs a PWM signal to the hardware watchdog module, the hardware watchdog module controls the power switch module to turn on, thus connecting the enable signal SW-EN to the enable terminal of the DC-DC converter module, enabling the DC-DC converter module to work and supply power to the main control module. If the main control module does not continuously output a PWM signal to the hardware watchdog module, the hardware watchdog module controls the power switch module to turn off, thus controlling the enable terminal of the DC-DC converter module to not connect the enable signal SW-EN, causing the DC-DC converter module to stop working and stopping the power supply to the main control module, thereby causing the main control module to power off and shut down.

[0009] The hardware watchdog module includes a rectifier circuit, the input and output of which are respectively connected to the input and output of the hardware watchdog module.

[0010] The rectifier circuit includes a resistor R41, a capacitor C41, a capacitor C42, a diode D41, and a diode D42. The first end of the resistor R41 is connected to the input terminal of the rectifier circuit, the second end of the resistor R41 is connected to the first end of the capacitor C41, the second end of the capacitor C41 is connected to the positive terminal of the diode D41 and the negative terminal of the diode D42, the negative terminal of the diode D41 and the first end of the capacitor C42 are connected to the output terminal of the rectifier circuit, and the second end of the capacitor C42 and the positive terminal of the diode D42 are grounded.

[0011] The wake-up and sleep circuit of the battery management system further includes a mechanical switch module. The input terminal of the mechanical switch module is used to connect to the power signal VBAT, and the output terminal of the mechanical switch module is used to output the enable signal SW-EN.

[0012] The mechanical switch module includes resistors R61, R62, R63, and R64, transistor Q61, MOSFET M61, and mechanical switch SW61. The first terminal of resistor R61, the first terminal of mechanical switch SW61, and the emitter of transistor Q61 are connected to the input terminal of the mechanical switch module. The collector of transistor Q61 is connected to the output terminal of the mechanical switch module. The base of transistor Q61 is connected to the first terminal of resistor R62. The second terminal of resistor R62 is connected to the second terminal of resistor R61 and the source of MOSFET M61. The gate of MOSFET M61 is connected to the first terminals of resistors R63 and R64. The drain of MOSFET M61 and the second terminal of resistor R64 are grounded. The second terminal of resistor R63 is connected to the cathode of diode D61. The anode of diode D61 is connected to the second terminal of mechanical switch SW61.

[0013] The power switch module includes resistors R31, R32, and R33, transistors Q31 and Q32. The first end of resistor R31 is connected to the control terminal of the power switch module. The second end of resistor R31 is connected to the base of transistor Q31. The emitter of transistor Q31 is grounded. The collector of transistor Q31 is connected to the first end of resistor R33. The second end of resistor R33 is connected to the first end of resistor R32 and the base of transistor Q32. The emitter of transistor Q32 and the second end of resistor R32 are connected to the input terminal of the power switch module. The collector of transistor Q32 is connected to the output terminal of the power switch module.

[0014] The wake-up and hibernation circuit of the battery management system further includes a short-time start module; one end of the short-time start module is connected to an enable signal SW-EN, and the other end of the short-time start module is connected to a power switch module.

[0015] The short-time start module includes a resistor R51, an optocoupler IC51, and a capacitor C51. The first end of the resistor R51 is connected to the input terminal of the power switch module, the second end of the resistor R51 is connected to the positive terminal of the input side of the optocoupler IC51, the negative terminal of the input side of the optocoupler IC51 is grounded through the capacitor C51, the negative terminal of the output side of the optocoupler IC51 is grounded, and the positive terminal of the output side of the optocoupler IC51 is connected to the first end of the resistor R22.

[0016] The wake-up and hibernation circuit of the battery management system further includes an external power supply wake-up module. The input terminal of the external power supply wake-up module is used to connect to an external power supply, and the output terminal of the external power supply wake-up module is connected to the enable terminal of the DC-DC conversion module.

[0017] The external power supply wake-up module includes a voltage detection circuit and an electronic switch circuit. The input terminal of the voltage detection circuit is connected to the input terminal of the external power supply wake-up module, and the output terminal of the voltage detection circuit is connected to the control terminal of the electronic switch circuit. The input terminal of the electronic switch circuit is connected to the power signal VBAT, and the output terminal of the electronic switch circuit is connected to the output terminal of the external power supply wake-up module.

[0018] With the above solution, when the hardware watchdog module detects that the main control module has crashed (is not working properly), the hardware watchdog module controls the power switch module to turn off and the DC-DC conversion module to stop working, thereby causing the main control module to power off and shut down. At this time, the battery management system will also shut down, preventing the battery from discharging or charging, thus protecting electrical safety. Specifically, when the main control module crashes, the output level of the connection between the main control module and the hardware watchdog module remains unchanged. This prevents the main control module from continuously outputting PWM signals to the hardware watchdog module, causing the hardware watchdog module to control the power switch module to turn off and the DC-DC conversion module to stop working, thereby causing the main control module to power off and shut down. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the principle of the present invention.

[0020] Figure 2 This is a partial circuit principle of the present invention. Figure 1 .

[0021] Figure 3 This is a partial circuit principle of the present invention. Figure 2 . Detailed Implementation

[0022] To further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0023] like Figures 1 to 3 As shown, this invention discloses a wake-up and sleep circuit for a battery management system, which includes a main control module, a DC-DC conversion module, a power switch module, and a hardware watchdog module; wherein, the input terminal of the power switch module is connected to an enable signal SW-EN, the output terminal of the power switch module is connected to the enable terminal of the DC-DC conversion module, the control terminal of the power switch module is connected to the output terminal of the hardware watchdog module, the input terminal of the hardware watchdog module is connected to one output terminal of the main control module, and the power supply terminal of the main control module is connected to the output terminal of the DC-DC module.

[0024] In this invention, the hardware watchdog module is used to monitor whether the main control module is working properly. If the main control module is working properly, the hardware watchdog module controls the power switch module to turn on, enabling the DC-DC conversion module to work, thereby keeping the main control module powered on. If the main control module is not working properly, the hardware watchdog module controls the power switch module to turn off, controlling the DC-DC conversion module to stop working, thereby powering off and shutting down the main control module. Thus, when the hardware watchdog module detects that the main control module has crashed (is not working properly), it controls the power switch module to turn off, controlling the DC-DC conversion module to stop working, thereby powering off and shutting down the main control module. At this time, the battery management system will shut down, preventing the battery from discharging externally or charging, thereby protecting electrical safety.

[0025] Specifically, in this invention, when the main control module is working normally, it continuously outputs a PWM signal to the hardware watchdog module. The hardware watchdog module detects whether the main control module is continuously outputting a PWM signal to the hardware watchdog module to determine whether the main control module is working normally. If the main control module continuously outputs a PWM signal, the hardware watchdog module controls the power switch module to turn on, thus connecting the enable signal SW-EN to the enable terminal of the DC-DC conversion module, causing the DC-DC conversion module to work and supply power to the main control module, thereby powering on the main control module. If the main control module does not continuously output a PWM signal to the hardware watchdog module, the hardware watchdog module controls the power switch module to turn off, thus controlling the enable terminal of the DC-DC conversion module not to connect the enable signal SW-EN, causing the DC-DC conversion module to stop working and stopping the power supply to the main control module, thereby powering off the main control module and shutting it down. When the main control module crashes, the output level of the main control module connected to the hardware watchdog module remains unchanged. This prevents the main control module from continuously outputting PWM signals to the hardware watchdog module, causing the hardware watchdog module to control the power switch module to shut down and the DC-DC conversion module to stop working. Consequently, the main control module loses power and shuts down. At this time, the battery management system will also shut down, preventing the battery from discharging or charging, thus protecting electrical safety.

[0026] Cooperate Figure 2 As shown, the main control module may include an MCU processor IC11, which has signal processing and signal output capabilities.

[0027] Cooperate Figure 2As shown, the DC-DC conversion module may include resistors R21, R22, R23, and R24; capacitors C21, C22, C23, C24, C25, C26, and C27; diode D21; inductor L21; and DC-DC step-down chip U21. The VIN pin of DC-DC step-down chip U21 is connected to the power signal VBAT; the GND pin of DC-DC step-down chip U21 is grounded; the BOOT pin of DC-DC step-down chip U21 is connected to the first terminal of capacitor C22; the PH pin of DC-DC step-down chip U21 is connected to the second terminal of capacitor C22, the cathode of diode D21, and the first terminal of inductor L21; the second terminal of inductor L21 is connected to the first terminal of capacitor C23. The output terminal of the DC-DC converter module is connected to the output terminal of the DC-DC converter module. The positive terminal of diode D21 and the second terminal of capacitor C23 are grounded. The COMP pin of DC-DC step-down chip U21 is grounded through a series resistor R22 and capacitor C27. The VS pin of DC-DC step-down chip U21 is connected to the first terminal of resistor R23, the first terminal of resistor R24 ​​and the first terminal of capacitor C26. The second terminals of resistor R23, the second terminals of resistor R24 ​​and the second terminal of capacitor C26 are grounded. The SS pin of DC-DC step-down chip U21 is grounded through capacitor C25. The EN pin of DC-DC step-down chip U21 is connected to the first terminal of resistor R21 and the first terminal of capacitor C24. The second terminal of capacitor C24 is grounded. The second terminal of resistor R21 is connected to the enable terminal of the DC-DC converter module.

[0028] Cooperate Figure 2 As shown, the power switch module may include resistors R31, R32, and R33, transistors Q31 and Q32. The first end of resistor R31 is connected to the control terminal of the power switch module. The second end of resistor R31 is connected to the base of transistor Q31. The emitter of transistor Q31 is grounded. The collector of transistor Q31 is connected to the first end of resistor R33. The second end of resistor R33 is connected to the first end of resistor R32 and the base of transistor Q32. The emitter of transistor Q32 and the second end of resistor R32 are connected to the input terminal of the power switch module. The collector of transistor Q32 is connected to the output terminal of the power switch module. When the hardware watchdog module inputs a high-level conduction signal to the control terminal of the power switch module, transistor Q31 conducts, pulling down the base level of transistor Q32, thus turning on transistor Q32. This connects the input and output terminals of the power switch module.

[0029] Cooperate Figure 2As shown, the hardware watchdog module may include a rectifier circuit. The input and output terminals of the rectifier circuit are respectively connected to the input and output terminals of the hardware watchdog module. The rectifier circuit can rectify the PWM signal output by the main control module to form a high-level signal and output it to the power switch module. When the main control module crashes, the output level of the main control module connected to the hardware watchdog module remains unchanged. At this time, the rectifier circuit has no signal output, or the output signal of the rectifier circuit is insufficient to turn on the transistor Q31. Specifically, the rectifier circuit may include a resistor R41, a capacitor C41, a capacitor C42, a diode D41, and a diode D42. The first end of the resistor R41 is connected to the input terminal of the rectifier circuit, the second end of the resistor R41 is connected to the first end of the capacitor C41, the second end of the capacitor C41 is connected to the anode of the diode D41 and the cathode of the diode D42, the cathode of the diode D41 and the first end of the capacitor C42 are connected to the output terminal of the rectifier circuit, and the second end of the capacitor C42 and the anode of the diode D42 are grounded.

[0030] Cooperate Figure 2 As shown, the hardware watchdog module may further include a signal amplification circuit. The input terminal of the rectifier circuit is connected to the input terminal of the hardware watchdog module through the signal amplification circuit. The input and output terminals of the signal amplification circuit are respectively connected to the input terminal of the hardware watchdog module and the input terminal of the rectifier circuit. The signal amplification circuit first amplifies the PWM signal output by the main control module, and then the rectifier circuit rectifies the amplified PWM signal to form a high-level conduction signal output. Specifically, the signal amplification circuit includes resistors R42, R43, R44, and R45, and transistors Q41, Q42, and Q43. The first terminal of resistor R42 is connected to the power supply signal VBAT. The second terminal of resistor R42 is connected to the first terminal of resistor R43 and the collector of transistor Q41. The second terminal of resistor R43 is connected to the base of transistor Q41, the collector of transistor Q42, and the base of transistor Q43. The emitters of transistors Q42 and Q43 are connected to the output terminal of the signal amplification circuit. The collector of transistor Q43, the emitter of transistor Q42, and the first terminal of resistor R45 are grounded. The base of transistor Q42 is connected to the second terminal of resistor R45 and the first terminal of resistor R44. The second terminal of resistor R44 is connected to the input terminal of the signal amplification circuit.

[0031] Cooperate Figure 1 and Figure 2As shown, the wake-up and hibernation circuit of a battery management system according to the present invention may further include a short-time start module. One end of the short-time start module is connected to an enable signal SW-EN, and the other end is connected to a power switch module. When the enable signal SW-EN is input to the short-time start module and the power switch module, the short-time start module controls the power switch module to be briefly turned on within a set time, so that the power switch module can briefly control the DC-DC step-down chip U21 to work and supply power to the main control module, thereby enabling the main control module to work and output a PWM signal to the emergency watchdog module. In this way, the input of the enable signal SW-EN can briefly start the main control module. Figure 2 As shown, the short-time start module may include a resistor R51, an optocoupler IC51, and a capacitor C51. The first end of resistor R51 is connected to the input terminal of the power switch module, and the second end of resistor R51 is connected to the positive input terminal of the optocoupler IC51. The negative input terminal of the optocoupler IC51 is grounded through capacitor C51, and the negative output terminal of the optocoupler IC51 is grounded. The positive output terminal of the optocoupler IC51 is connected to the first end of resistor R22. When the enable signal SW-EN is input to the short-time start module, the voltage at the first end of capacitor C51 is zero, causing the input side of the optocoupler IC51 to conduct and emit light, thereby enabling the optocoupler IC51 to... The output of capacitor C51 is turned on, pulling the base level of transistor Q32 low, thus turning on transistor Q32 and enabling the input and output of the power switch module. As the enable signal SW-EN is input to the short-time start module for an extended period, the voltage at the first terminal of capacitor C51 gradually increases. When the voltage at the first terminal of capacitor C51 rises to the point where the input of optocoupler IC51 is not turned on, the output of optocoupler IC51 is also not turned on. At this point, the short-time start module cannot pull the base level of transistor Q32 low, meaning the short-time start module cannot control the input and output of the power switch module to turn on.

[0032] Cooperate Figure 1 and Figure 3As shown, the wake-up and sleep circuit of the battery management system of the present invention further includes a mechanical switch module. The input terminal of the mechanical switch module is used to connect to the power signal VBAT, and the output terminal of the mechanical switch module is used to output the enable signal SW-EN. Specifically, the mechanical switch module includes resistors R61, R62, R63, and R64, transistor Q61, MOSFET M61, and mechanical switch SW61. The first terminal of resistor R61, the first terminal of mechanical switch SW61, and the emitter of transistor Q61 are connected to the input terminal of the mechanical switch module. The collector of transistor Q61 is connected to the output terminal of the mechanical switch module. The base of transistor Q61 is connected to the first terminal of resistor R62. The second terminal of resistor R62 is connected to the second terminal of resistor R61 and the source of MOSFET M61. The gate of MOSFET M61 is connected to the first terminals of resistors R63 and R64. The drain of MOSFET M61 and the second terminal of resistor R64 are grounded. The second terminal of resistor R63 is connected to the cathode of diode D61. The anode of diode D61 is connected to the second terminal of mechanical switch SW61. When the mechanical switch SW61 is pressed and turned on, the MOSFET M61 turns on and pulls down the base level of the transistor Q61, causing the transistor Q61 to turn on. In this way, the input and output terminals of the mechanical switch module are connected.

[0033] Cooperate Figure 1 and Figure 3 As shown, the wake-up and sleep circuit of the battery management system of the present invention may further include a switch state detection module. The main control module detects the conduction state of the mechanical switch module through the switch state detection module. Specifically, the switch state detection module includes resistors R71 and R72. The first end of resistor R71 is connected to the second end of mechanical switch S61. The second end of resistor R71 and the first end of resistor R72 are connected to an input terminal of the main control module. The second end of resistor R72 is grounded. When mechanical switch S61 is pressed and turned on, the second end of mechanical switch S61 outputs a voltage to the switch state detection module. Resistors R71 and R72 of the switch state detection module divide the output voltage of the second end of mechanical switch S61 and then output it to the main control module, so that the main control module knows that mechanical switch S61 is turned on.

[0034] Cooperate Figure 1 and Figure 3As shown, the wake-up and hibernation circuit of the battery management system of the present invention may further include an external power supply wake-up module. The input terminal of the external power supply wake-up module is used to connect to an external power source, and the output terminal of the external power supply wake-up module is connected to the enable terminal of the DC-DC conversion module. When the battery management system is in hibernation, the input terminal of the external power supply wake-up module can be connected to an external power source. At this time, the external power supply wake-up module will wake up the DC-DC conversion module, causing the DC-DC conversion module to work and supply power to the main control module, thereby waking up the battery management system. The method of waking up the battery management system is very simple and convenient.

[0035] Cooperate Figure 3 As shown, the external power supply wake-up module includes a voltage detection circuit and an electronic switch circuit. The input terminal of the voltage detection circuit is connected to the input terminal of the external power supply wake-up module, and the output terminal of the voltage detection circuit is connected to the control terminal of the electronic switch circuit. The input terminal of the electronic switch circuit is connected to the power signal VBAT, and the output terminal of the electronic switch circuit is connected to the output terminal of the external power supply wake-up module. When an external power supply is connected to the input terminal of the external power supply wake-up module, the voltage detection circuit controls the electronic switch circuit to conduct, thereby inputting the power signal VBAT to the enable terminal of the DC-DC conversion module to wake up the DC-DC conversion module. Specifically, the voltage detection circuit includes resistors R81 and R82, and a Zener diode ZD81. The first terminal of resistor R81 is connected to the input terminal of the voltage detection circuit, and the second terminal of resistor R81 is connected to the first terminal of resistor R82 and the negative terminal of Zener diode ZD81. The second terminal of resistor R82 is grounded, and the positive terminal of Zener diode ZD81 is connected to the output terminal of the voltage detection circuit. The electronic switch circuit includes resistors R83, R84, R85, and R86, transistors Q81 and Q82, and an optocoupler IC81. The first terminal of resistor R86 and the base of transistor Q82 are connected to the control circuit of the electronic switch circuit. The second terminal of resistor R86 and the emitter of transistor Q82 are grounded. The collector of transistor Q82 is connected to the negative input terminal of optocoupler IC81. The positive input terminal of optocoupler IC81 is connected to the power supply terminal of the electronic switch circuit through resistor R83. The negative output terminal of optocoupler IC81 is grounded. The positive output terminal of optocoupler IC81 is connected to the first terminal of resistor R84 and the first terminal of resistor R85. The second terminal of resistor R84 and the emitter of transistor Q81 are connected to the input terminal of the electronic switch circuit. The base of transistor Q81 is connected to the second terminal of resistor R85. The collector of transistor Q81 is connected to the output terminal of the electronic switch circuit.

[0036] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A wake-up and sleep circuit for a battery management system, characterized in that: It includes a main control module, a DC-DC conversion module, a power switch module, and a hardware watchdog module; The input terminal of the power switch module is connected to the enable signal SW-EN, the output terminal of the power switch module is connected to the enable terminal of the DC-DC converter module, the control terminal of the power switch module is connected to the output terminal of the hardware watchdog module, the input terminal of the hardware watchdog module is connected to one output terminal of the main control module, and the power supply terminal of the main control module is connected to the output terminal of the DC-DC module. The hardware watchdog module is used to monitor whether the main control module is working properly. If the main control module is working properly, the hardware watchdog module controls the power switch module to turn on, thereby enabling the DC-DC conversion module to work and keeping the main control module powered on. If the main control module is not working properly, the hardware watchdog module controls the power switch module to turn off, thereby enabling the DC-DC conversion module to stop working and causing the main control module to lose power and shut down. When the main control module is working normally, it continuously outputs a PWM signal to the hardware watchdog module. The hardware watchdog module detects whether the main control module continuously outputs a PWM signal. If the main control module continuously outputs a PWM signal to the hardware watchdog module, the hardware watchdog module controls the power switch module to turn on, thus connecting the enable signal SW-EN to the enable terminal of the DC-DC converter module, enabling the DC-DC converter module to work and supply power to the main control module. If the main control module does not continuously output a PWM signal to the hardware watchdog module, the hardware watchdog module controls the power switch module to turn off, thus controlling the enable terminal of the DC-DC converter module to not connect the enable signal SW-EN, causing the DC-DC converter module to stop working and stopping the power supply to the main control module, thereby causing the main control module to power off and shut down. The hardware watchdog module includes a rectifier circuit, and the input and output terminals of the rectifier circuit are respectively connected to the input and output terminals of the hardware watchdog module.

2. The wake-up and sleep circuit of a battery management system as described in claim 1, characterized in that: The rectifier circuit includes resistor R41, capacitor C41, capacitor C42, diode D41, and diode D42; The first end of resistor R41 is connected to the input terminal of the rectifier circuit, the second end of resistor R41 is connected to the first end of capacitor C41, the second end of capacitor C41 is connected to the positive terminal of diode D41 and the negative terminal of diode D42, the negative terminal of diode D41 and the first end of capacitor C42 are connected to the output terminal of the rectifier circuit, and the second end of capacitor C42 and the positive terminal of diode D42 are grounded.

3. The wake-up and sleep circuit of a battery management system as described in claim 1, characterized in that: It also includes a mechanical switch module, whose input terminal is used to connect to the power signal VBAT, and whose output terminal is used to output the enable signal SW-EN.

4. The wake-up and sleep circuit of a battery management system as described in claim 3, characterized in that: The mechanical switch module includes resistors R61, R62, R63, and R64, transistor Q61, MOSFET M61, and mechanical switch SW61. The first terminal of resistor R61, the first terminal of mechanical switch SW61, and the emitter of transistor Q61 are connected to the input terminal of the mechanical switch module. The collector of transistor Q61 is connected to the output terminal of the mechanical switch module. The base of transistor Q61 is connected to the first terminal of resistor R62. The second terminal of resistor R62 is connected to the second terminal of resistor R61 and the source of MOSFET M61. The gate of MOSFET M61 is connected to the first terminal of resistor R63 and the first terminal of resistor R64. The drain of MOSFET M61 and the second terminal of resistor R64 are grounded. The second terminal of resistor R63 is connected to the cathode of diode D61. The anode of diode D61 is connected to the second terminal of mechanical switch SW61.

5. The wake-up and sleep circuit of a battery management system as described in claim 1, characterized in that: The power switch module includes resistors R31, R32, and R33, transistor Q31, and transistor Q32; The first end of resistor R31 is connected to the control terminal of the power switch module. The second end of resistor R31 is connected to the base of transistor Q31. The emitter of transistor Q31 is grounded. The collector of transistor Q31 is connected to the first end of resistor R33. The second end of resistor R33 is connected to the first end of resistor R32 and the base of transistor Q32. The emitter of transistor Q32 and the second end of resistor R32 are connected to the input terminal of the power switch module. The collector of transistor Q32 is connected to the output terminal of the power switch module.

6. The wake-up and sleep circuit of a battery management system as described in claim 5, characterized in that: It also includes a short-time start module; one end of the short-time start module is connected to the enable signal SW-EN, and the other end of the short-time start module is connected to the power switch module.

7. The wake-up and sleep circuit of a battery management system as described in claim 6, characterized in that: The short-time start-up module includes a resistor R51, an optocoupler IC51, and a capacitor C51; The first end of resistor R51 is connected to the input terminal of the power switch module, the second end of resistor R51 is connected to the positive terminal of the input side of optocoupler IC51, the negative terminal of the input side of optocoupler IC51 is grounded through capacitor C51, the negative terminal of the output side of optocoupler IC51 is grounded, and the positive terminal of the output side of optocoupler IC51 is connected to the first end of resistor R22.

8. The wake-up and sleep circuit of a battery management system as described in claim 1, characterized in that: It also includes an external power supply wake-up module. The input terminal of the external power supply wake-up module is used to connect to an external power supply, and the output terminal of the external power supply wake-up module is connected to the enable terminal of the DC-DC conversion module.

9. The wake-up and sleep circuit of a battery management system as described in claim 8, characterized in that: The external power supply wake-up module includes a voltage detection circuit and an electronic switch circuit. The input terminal of the voltage detection circuit is connected to the input terminal of the external power supply wake-up module, and the output terminal of the voltage detection circuit is connected to the control terminal of the electronic switch circuit. The input terminal of the electronic switch circuit is connected to the power signal VBAT, and the output terminal of the electronic switch circuit is connected to the output terminal of the external power supply wake-up module.

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