Intelligent ignition clamp for automobile emergency starting power supply

Abstract

The utility model relates to the technical field of emergency starting power supplies, in particular to an automobile emergency starting power supply intelligent ignition clamp which comprises a starting power supply, a protection plate, a positive electrode ignition clamp and a negative electrode ignition clamp, and the protection plate is provided with an MCU control chip, an MOS switching circuit, an MOS driving circuit and a BMS protection system. The BMS protection system comprises a voltage identification circuit, a voltage stabilizing circuit and a reverse charging function module. The input end of the reverse charging function module is connected with the MCU control chip. The battery voltage and the load voltage are monitored through the BMS protection system to judge whether the ignition clamp of the automobile emergency starting power supply is short-circuited or not and whether the battery is overloaded or not, and once abnormal working conditions occur, the relay can be controlled to disconnect the circuit through the combined action of the MCU control chip, the MOS driving circuit and the MOS switching circuit, so that safety accidents or battery damage is avoided, and the safety of the automobile emergency starting power supply is ensured. The protection functions of reverse connection protection, reverse charging protection, short circuit protection, overvoltage protection, overcurrent protection, reverse charging function and the like are realized.

Description

Technical Field

[0001] The present application relates to the technical field of emergency starting power supplies, and in particular to an intelligent ignition clip for an automobile emergency starting power supply. Background Art

[0002] The main function of a car emergency starting power supply is to start the car when the car battery is powered or the car cannot be started normally due to other reasons. The starting power supply is small, portable, convenient and practical, which makes the use of the starting power supply more and more widespread.

[0003] However, the existing automobile emergency starting power ignition clamp uses the unidirectional conductive effect of the diode to protect the battery pack in the emergency starting power supply from reverse charging (reverse charging here refers to the car generator charging the starting power battery). However, the ignition clamp of this circuit does not have protection functions such as short circuit protection, reverse connection protection and over-discharge protection. The protection function is defective. Using this type of ignition clamp is prone to cause safety hazards such as battery bulging and short circuit. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides an intelligent ignition clip for an automobile emergency starting power supply, comprising a starting power supply, a protection board, a positive ignition clip and a negative ignition clip, the protection board comprising an MCU control chip, a MOS switching circuit, a MOS driving circuit, and a BMS protection system, the positive pole of the starting power supply is connected to the positive ignition clip through a relay, the BMS protection system is respectively connected to the output end of the relay and the MCU control chip, the MCU control chip is connected to the relay through the MOS switching circuit, the MOS driving circuit is connected to the positive pole of the starting power supply and the MCU control chip, the BMS protection system comprises a voltage identification circuit, a voltage stabilizing circuit, and a reverse charging function module, the input end of the voltage identification circuit and the voltage stabilizing circuit is connected to the positive pole of the starting power supply, the output end of the voltage identification circuit and the voltage stabilizing circuit is connected to the MCU control chip, the input end of the reverse charging function module is connected to the MCU control chip, and the output end is grounded.

[0005] Preferably, a positive electrode OUT+, a positive electrode BAT+ and a negative electrode BAT- are formed on the protection board, the positive electrode ignition clip is connected to the positive electrode OUT+ through a positive electrode output connection line, the positive electrode BAT+ is connected to the positive electrode of the starting power supply through a positive electrode input connection line, the negative electrode ignition clip is connected to the negative electrode of the starting power supply through a negative electrode output connection line, and an output current sampling line is connected to the negative electrode output connection line at a distance of 57 mm from the negative electrode of the starting power supply, and the other end of the output current sampling line is connected to the negative electrode BAT-.

[0006] Preferably, the reverse charging function module includes a transistor Q2, a resistor R22, a resistor R27, and a capacitor C17; the S pole of the transistor Q2 is connected to the positive electrode BAT+, the G pole of the transistor Q2 is connected to the positive electrode BAT+ through the resistor R5, one end of the resistor R22 is connected to the D pole of the transistor Q2, and the other end of the resistor R22 is respectively connected to the BATVOL pin of the MCU control chip and one end of the resistor R27, and the other end of the resistor R27 is grounded; one end of the capacitor C17 is connected to the BATVOL pin of the MCU control chip, and the other end is grounded.

[0007] Preferably, the output end of the MOS switch circuit is connected to the MCU control chip, and the positive input connection line is connected to the MOS switch circuit; the MOS switch circuit includes a MOS tube Q9 and a control chip U1, the MOS tube Q9 is connected to the control chip U1, and the other end is grounded.

[0008] Preferably, the voltage identification circuit includes a control chip U1, a diode D1, a resistor R1, a resistor R3, a resistor R6, a resistor R9, a resistor R14, a resistor R20, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C13, and a capacitor C15; one end of the diode D1 is connected to the positive electrode BAT+, and the other end is connected to the control chip U1 through the resistor R1, one end of the capacitor C2 is connected to the resistor R1, and the other end is grounded; one end of the resistor R3 is connected to the positive electrode BAT+, and the other end is connected to the control chip U1, One end of capacitor C3 is connected to resistor R3, and the other end is grounded; one end of capacitor C4 is connected to resistor R6, and the other end is grounded; one end of capacitor C13 is connected to resistor R9, and the other end is grounded; one end of capacitor C15 is connected to resistor R14, and the other end is grounded; one end of resistor R20 is connected to capacitors C3, C4, C13, and C14, and the other end is connected to MOS transistor Q9; the MOS switch circuit includes MOS transistor Q9 and control chip U1, and MOS transistor Q9 is connected to the control chip U1, and the other end is grounded.

[0009] Preferably, the voltage stabilizing circuit includes a diode D15, a diode D16, a resistor R37, a resistor R43, a capacitor C36, a capacitor C37, a capacitor C38, a capacitor C39, a capacitor C40 and a voltage regulator; capacitors C36, C37, and C38 are connected between the GND pin of the voltage regulator and the Vout pin of the voltage regulator, capacitors C39 and C40 are connected between the GND pin of the voltage regulator and the Vin pin of the voltage regulator, the GND pin of the voltage regulator is grounded, and the Vin pin of the voltage regulator is connected to the positive electrode BAT+ through a diode D16.

[0010] Preferably, the controlled end of the MOS drive circuit is connected to the BMS protection system, and the output end is connected to the MOS switch circuit; the MOS drive circuit includes a resistor R2, a resistor R17, a resistor R19, a resistor R28, a resistor R29, a resistor R34, a resistor R39, a resistor R41, a resistor R44, a resistor R45, a capacitor C1, a transistor Q12 and a MOS transistor Q3, the MOS transistor Q3 is connected to the D pole of the transistor Q12 through the resistor R17, the resistor R28 and the resistor R34, the G pole of the transistor Q12 is connected to the PWMH pin of the MCU control chip through the resistor R41, the S pole of the transistor Q12 is connected to the G pole of the transistor Q12 through the resistor R45, and the S pole of the transistor Q12 is grounded.

[0011] Preferably, the protection board also includes a temperature sensor module, a power supply module circuit, a boost / buck circuit, an indicator light circuit, a display screen display circuit, and an LED lighting circuit; the controlled end of the temperature sensor module is connected to the NTC1 pin of the MCU control chip; the controlled end of the power supply module circuit is connected to the VDD pin of the MCU control chip, and the input ends of the boost / buck circuit are respectively connected to the MCU control chip; the controlled end of the indicator light circuit is connected to the PA3 and PA6 pins of the MCU control chip, the input end of the display screen display circuit is respectively connected to the DIG1, ​​DIG2, and DIG3 of the MCU control chip, and the output end is grounded; the controlled end of the LED lighting circuit is connected to the LEDSW pin of the MCU control chip.

[0012] As can be seen from the above, the following beneficial effects can be achieved by applying the present application: the present application solution includes a starting power supply, a protection board, a positive ignition clip, and a negative ignition clip. The protection board is provided with an MCU control chip, a MOS switch circuit, a MOS drive circuit, and a BMS protection system. The BMS protection system monitors the battery voltage and the load voltage to determine whether the car's emergency starting power ignition clip is short-circuited or whether the battery is overloaded. Once an abnormal operating condition occurs, the MCU control chip, the MOS drive circuit, and the MOS switch circuit work together to control the relay to disconnect the circuit, avoiding safety accidents or damage to the battery, and realizing reverse connection protection, reverse charging protection, short circuit protection, overvoltage protection, overcurrent protection, reverse charging function, and other protection functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] To more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments of the present application or the prior art. Obviously, the drawings described below are only part of the embodiments of the present application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0014] Figure 1 This is a schematic diagram of the intelligent ignition clip for the car emergency starting power supply according to the embodiment of the present application;

[0015] Figure 2 This is the circuit diagram of the intelligent ignition clip for the car emergency starting power supply according to the embodiment of the present application;

[0016] Figure 3 This is the circuit diagram of the MCU control chip in the embodiment of the present application;

[0017] Figure 4 This is a circuit diagram of the voltage stabilizing module according to an embodiment of the present application;

[0018] Figure 5 This is a boost / buck circuit diagram of an embodiment of the present application;

[0019] Figure 6 This is a circuit diagram of the reverse charging function module of an embodiment of the present application;

[0020] Figure 7 This is a MOS driving circuit diagram of an embodiment of the present application;

[0021] Figure 8 This is a circuit diagram of the BMS protection system in the embodiment of the present application;

[0022] Figure 9 This is a schematic diagram of a relay circuit according to an embodiment of the present application;

[0023] Figure 10 This is a schematic diagram of the LED lighting circuit according to an embodiment of the present application;

[0024] Figure 11 This is a schematic diagram of the display circuit of the display screen according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0026] Example

[0027] In order to solve the above technical problems, this embodiment provides a car emergency starting power supply intelligent ignition clamp, such as Figure 1 As shown, it includes a starting power supply, a protection board, a positive ignition clip and a negative ignition clip. The protection board is provided with an MCU control chip, a MOS switching circuit, a MOS driving circuit, and a BMS protection system. The positive pole of the starting power supply is connected to the positive ignition clip through a relay. The BMS protection system is respectively connected to the output end of the relay and the MCU control chip. The MCU control chip is connected to the relay through a MOS switching circuit. The MOS driving circuit is connected to the positive pole of the starting power supply and the MCU control chip. The BMS protection system includes a voltage identification circuit, a voltage stabilizing circuit, and a reverse charging function module. The input end of the reverse charging function module is connected to the MCU control chip, the input end of the voltage identification circuit and the voltage stabilizing circuit is connected to the positive pole of the starting power supply, and the output end of the voltage identification circuit and the voltage stabilizing circuit is connected to the MCU control chip. The BMS protection system monitors the battery voltage and load voltage to determine whether the car's emergency starting power ignition clip is short-circuited or the battery is overloaded. Once an abnormal operating condition occurs, the MCU control chip, MOS drive circuit and MOS switch circuit can work together to control the relay to disconnect the circuit, avoiding safety accidents or damage to the battery, and realizing reverse connection protection, reverse charging protection, short circuit protection, overvoltage protection, overcurrent protection, reverse charging function and other protection functions.

[0028] Specifically, a positive electrode OUT+, a positive electrode BAT+ and a negative electrode BAT- are formed on the protection board. The positive ignition clip is connected to the positive electrode OUT+ through the positive output connection line, the positive electrode BAT+ is connected to the positive electrode of the starting power supply through the positive input connection line, the negative ignition clip is connected to the negative electrode of the starting power supply through the negative output connection line, and the other end of the output current sampling line is connected to the negative electrode BAT-. The positive ignition clip and the negative ignition clip are respectively connected to the positive and negative poles of the car battery to be started. The output current sampling line is connected to the negative output connection line at a distance of 57 mm from the negative pole of the starting power supply, that is, the distance between the connection end of the negative output connection line and the negative pole of the starting power supply and the stripping connection point of the current sampling line and the negative output connection line is 57 mm. This length of the negative output connection line forms a fixed resistance.

[0029] Furthermore, the protection board is also provided with a temperature sensor module, a power supply module circuit, and a boost / buck circuit; the controlled end of the temperature sensor module is connected to the NTC1 pin of the MCU control chip; the controlled end of the power supply module circuit is connected to the VDD pin of the MCU control chip, and the VDD pin and VSS pin of the MCU control chip are connected by resistors, capacitors, and transistors to complete the opening and closing of the power supply module. The input ends of the boost / buck circuit are respectively connected to the MCU control chip, and the output ends of the boost / buck circuit are respectively connected to the MOS tubes in the boost / buck circuit.

[0030] The protection board is also provided with an indicator light circuit, a display screen circuit and an LED lighting circuit. The controlled end of the indicator light circuit is connected to the PA3 and PA6 pins of the MCU control chip, and the output end is connected to resistors R49 and R50; the input end of the display screen circuit is respectively connected to the DIG1, ​​DIG2 and DIG3 pins of the MCU control chip, and the output end is grounded; the controlled end of the LED lighting circuit is connected to the LEDSW pin of the MCU control chip, and the output end is connected to resistors R92 and R93.

[0031] Furthermore, the voltage recognition circuit identifies the input voltage from the positive input connection line and detects whether the input voltage meets the requirements for vehicle battery starting. Before starting the vehicle, it performs input voltage undervoltage protection and input voltage overvoltage protection to ensure that the vehicle emergency starting power supply can provide the appropriate output voltage. At the same time, it monitors whether the positive and negative ignition clamps are connected to the battery incorrectly. The MCU control chip controls the relay on and off to provide short-circuit protection and overcurrent protection for the ignition clamp output. The voltage stabilization circuit stabilizes the corresponding input voltage and provides a stable voltage for the MCU control chip to operate.

[0032] In specific implementation, preferably, the MCU control chip of this embodiment adopts ARM-MM32SPIN-05PF chip, such as Figure 3As shown, the MCU control chip includes NC pin, VDD pin, VDDA pin, BOOT0 pin, PA0 / AN0-LEDSW pin, PA1 / AN1-INVOL pin, PA2 / AN2-CAROCP pin, PA3 / AN3 pin, PA4 / AN4-BATVOL pin, PA5 / AN5-PW pin, PA6 / AN6 pin, PA7 / AN7-INW pin, PA8-SEG7 pin, PA9 / TIMI_CH1N-SEG1 pin, PA10 / TIMI_CH1-SEG2 pin, PA11-SEG3 pin, PA12-SEG4 pin, PA13-CC2PU pin, PA14-CC1PU pin, PA15-DIG3 pin, PB0 / AN8-NTC1 pin, PB1 / AN9-INCUR pin, PB2-USBS W pin, PB3 / AN10-SEG6 pin, PB4 / AN11-QCEN pin, PB5 pin, PB6 / TIM16_CH1N-PWML pin, PB7 / AN12-CARVOL pin, PB8 / TIM16_CH1-PWMH pin, PB9-CARIN pin, PB10-ON pin, PB11-INEN pin, PB12-KEY1 pin, PB13 / TIM1_CH1N-CARSW pin, PB14 / TIM1_CH1-DIG1 pin, PB15-SEG8 pin, PC13-ACIN pin, PC14-ACSI pin, PC15 pin, PD0-OSC_IN pin, PD1-OSC_OUT pin, PD2-SEG5 pin, PD3-DIG2 pin, nRST pin, VSSA pin, and VSS pin. The VDD pin of the MCU control chip is connected in series with the VSS pin of the MCU control chip module through capacitors C24, C27, C35 and C41, and the node between capacitors C24 and C41 is grounded.

[0033] Specifically, such as Figure 2 As shown, this embodiment provides a specific circuit connection structure. Figure 5-6 As shown, the reverse charging function module includes a transistor Q2, a resistor R22, a resistor R27, and a capacitor C17; the S pole of the transistor Q2 is connected to the positive electrode BAT+, the G pole of the transistor Q2 is connected to the positive electrode BAT+ through the resistor R5, one end of the resistor R22 is connected to the D pole of the transistor Q2, and the other end of the resistor R22 is respectively connected to the BATVOL pin of the MCU control chip and one end of the resistor R27, and the other end of the resistor R27 is grounded; one end of the capacitor C17 is connected to the BATVOL pin of the MCU control chip, and the other end is grounded.

[0034] The output end of the MOS switch circuit is connected to the CARIN of the MCU control chip, and the positive input connection line is connected to the MOS switch circuit; the MOS switch circuit includes a MOS tube Q9 and a control chip U1, the MOS tube Q9 is connected to the control chip U1, and the other end is grounded.

[0035] Further, such as Figure 8 As shown, the voltage identification circuit includes a control chip U1, a diode D1, a resistor R1, a resistor R3, a resistor R6, a resistor R9, a resistor R14, a resistor R20, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C13, and a capacitor C15; one end of the diode D1 is connected to the positive electrode BAT+, and the other end is connected to the control chip U1 through the resistor R1; one end of the capacitor C2 is connected to the resistor R1, and the other end is grounded; one end of the resistor R3 is connected to the positive electrode BAT+, and the other end is connected to the control chip U1; one end of the capacitor C3 is connected to the resistor R3, and the other end is grounded; one end of the capacitor C4 is connected to the resistor R6, and the other end is grounded; one end of the capacitor C13 is connected to the resistor R9, and the other end is grounded; one end of the capacitor C15 is connected to the resistor R14, and the other end is grounded; one end of the resistor R20 is connected to the capacitors C3, C4, C13, and C14, and the other end is connected to the MOS transistor Q9.

[0036] like Figure 4 As shown, the voltage stabilizing circuit includes a diode D15, a diode D16, a resistor R37, a resistor R43, a capacitor C36, a capacitor C37, a capacitor C38, a capacitor C39, a capacitor C40 and a voltage regulator; capacitors C36, C37, and C38 are connected between the GND pin of the voltage regulator and the Vout pin of the voltage regulator, and capacitors C39 and C40 are connected between the GND pin of the voltage regulator and the Vin pin of the voltage regulator. The GND pin of the voltage regulator is grounded, and the Vin pin of the voltage regulator is connected to the positive electrode BAT+ through the diode D16. The Vin pin of the voltage regulator is connected to the 5V power input interface through the diode D15.

[0037] The controlled end of the MOS drive circuit is connected to the BMS protection system, and the output end is connected to the MOS switch circuit, such as Figure 7 As shown, the MOS drive circuit includes a resistor R2, a resistor R17, a resistor R19, a resistor R28, a resistor R29, a resistor R34, a resistor R39, a resistor R41, a resistor R44, a resistor R45, a capacitor C1, a transistor Q12, and a MOS transistor Q3. The MOS transistor Q3 is connected to the D electrode of the transistor Q12 through the resistor R17, the resistor R28, and the resistor R34. The G electrode of the transistor Q12 is connected to the PWMH pin of the MCU control chip through the resistor R41. The S electrode of the transistor Q12 is connected to the G electrode of the transistor Q12 through the resistor R45. The S electrode of the transistor Q12 is grounded.

[0038] Further, such as Figure 10 As shown, the LED lighting circuit includes LED lamp bead 2, LED lamp bead 3, resistor R92, resistor R93, resistor R95, resistor R96, and transistor Q25. Resistor R92 and LED lamp bead 2 are connected in series, resistor R93 and LED lamp bead 3 are connected in series, LED lamp bead 2 and LED lamp bead 3 are connected in parallel to the collector of transistor Q25, the base of transistor Q25 is connected to the LEDSW pin of the MCU control chip through resistor R95, the emitter of transistor Q25 is connected to the base through resistor R96, and the emitter of transistor Q25 is grounded.

[0039] Furthermore, the traffic light indicator circuit includes a resistor R49, a resistor R50, and a light emitting diode LED1 that emits green light and red light. The two ends of the light emitting diode LED1 are connected to the MCU control chip through the resistor R49 and the resistor R50 respectively.

[0040] like Figure 11 As shown, the display screen display circuit includes resistor R64, resistor R67, resistor R69, transistor Q15, transistor Q16, transistor Q17, and transistor Q15, transistor Q16, transistor Q17 are connected to DIG1, ​​DIG2, and DIG3 of the MCU control chip through resistor R64, resistor R67, and resistor R69 respectively. The temperature sensor module circuit includes capacitor C22, resistor R38, and R42, and capacitor C22 is connected to the NTC1 pin of the MCU control chip. The power supply module circuit includes resistor R73 and transistor Q18, and transistor Q18 is connected to the VDD pin of the MCU control chip. The VDD pin and VSS pin of the MCU control chip are connected by resistors, capacitors, and transistors to complete the opening and closing of the power supply module. The specific connection method is as follows Figure 3 shown.

[0041] Among them, Figure 5 The following is a schematic diagram of a step-up / step-down circuit: Figure 9 The figure shows a relay circuit diagram. When the car battery voltage is high, the car battery will reverse charge the starting power supply of this solution through the smart ignition clamp. The reverse charging time is ≤10 seconds. During the reverse charging process, the boost / buck circuit adjusts the circuit voltage so that the starting power supply voltage reaches the target voltage, thereby achieving the reverse charging purpose. When Type-C input voltage is required, the boost / buck circuit is used to achieve the purpose of boosting the voltage to realize the charging function of the starting power supply. When USB output voltage is required, the boost / buck circuit is used to achieve the purpose of stepping down the voltage to output the appropriate voltage to power the device. Since the boost / buck circuit and relay are very common circuit structures, they will not be described in detail. Please refer to the attached figure for the specific connection method.

[0042] In summary, the present application includes a starting power supply, a protection board, a positive ignition clip and a negative ignition clip. The protection board is provided with an MCU control chip, a MOS switch circuit, a MOS drive circuit, and a BMS protection system. The BMS protection system includes a voltage identification circuit, a voltage stabilizing circuit, and a reverse charging function module. The input end of the reverse charging function module is connected to the MCU control chip, the input end of the voltage identification circuit and the voltage stabilizing circuit is connected to the positive pole of the starting power supply, and the output end of the voltage identification circuit and the voltage stabilizing circuit is connected to the MCU control chip. The BMS protection system monitors the battery voltage and the load voltage to determine whether the ignition clip of the emergency starting power supply of the car is short-circuited or whether the battery is overloaded. Once an abnormal working condition occurs, the MCU control chip, the MOS drive circuit and the MOS switch circuit work together to control the relay to disconnect the circuit, thereby avoiding safety accidents or damage to the battery, and realizing reverse connection protection, reverse charging protection, short circuit protection, overvoltage protection, overcurrent protection, reverse charging function and other protection functions.

[0043] The above-described embodiments do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the above-described embodiments shall be included in the scope of protection of this technical solution.

Claims

1. An intelligent ignition clamp for automobile emergency starting power supply, characterized by: It includes a starting power supply, a protection board, a positive ignition clip and a negative ignition clip. The protection board is provided with an MCU control chip, a MOS switching circuit, a MOS driving circuit, and a BMS protection system. The positive pole of the starting power supply is connected to the positive ignition clip through a relay. The BMS protection system is respectively connected to the output end of the relay and the MCU control chip. The MCU control chip is connected to the relay through the MOS switching circuit. The MOS driving circuit is connected to the positive pole of the starting power supply and the MCU control chip. The BMS protection system includes a voltage identification circuit, a voltage stabilizing circuit, and a reverse charging function module. The input ends of the voltage identification circuit and the voltage stabilizing circuit are connected to the positive pole of the starting power supply, the output ends of the voltage identification circuit and the voltage stabilizing circuit are connected to the MCU control chip, and the input end of the reverse charging function module is connected to the MCU control chip.

2. The intelligent ignition clamp for automobile emergency starting power supply according to claim 1 is characterized in that: A positive electrode OUT+, a positive electrode BAT+ and a negative electrode BAT- are formed on the protection board. The positive electrode ignition clip is connected to the positive electrode OUT+ through a positive electrode output connection line, the positive electrode BAT+ is connected to the positive electrode of the starting power supply through a positive electrode input connection line, and the negative electrode ignition clip is connected to the negative electrode of the starting power supply through a negative electrode output connection line. An output current sampling line is connected to the negative electrode output connection line at a distance of 57 mm from the negative electrode of the starting power supply, and the other end of the output current sampling line is connected to the negative electrode BAT-.

3. The intelligent ignition clamp for automobile emergency starting power supply according to claim 2 is characterized in that: The reverse charging function module includes a transistor Q2, a resistor R22, a resistor R27, and a capacitor C17; the S pole of the transistor Q2 is connected to the positive electrode BAT+, the G pole of the transistor Q2 is connected to the positive electrode BAT+ through the resistor R5, one end of the resistor R22 is connected to the D pole of the transistor Q2, and the other end of the resistor R22 is respectively connected to the BATVOL pin of the MCU control chip and one end of the resistor R27, and the other end of the resistor R27 is grounded; one end of the capacitor C17 is connected to the BATVOL pin of the MCU control chip, and the other end is grounded.

4. The intelligent ignition clamp for automobile emergency starting power supply according to claim 2, characterized in that: The output end of the MOS switch circuit is connected to the MCU control chip, and the positive input connection line is connected to the MOS switch circuit; the MOS switch circuit includes a MOS transistor Q9 and a control chip U1, the MOS transistor Q9 is connected to the control chip U1, and the other end is grounded.

5. The intelligent ignition clamp for automobile emergency starting power supply according to claim 4 is characterized in that: The voltage identification circuit includes a control chip U1, a diode D1, a resistor R1, a resistor R3, a resistor R6, a resistor R9, a resistor R14, a resistor R20, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C13, and a capacitor C15; one end of the diode D1 is connected to the positive electrode BAT+, and the other end is connected to the control chip U1 through the resistor R1; one end of the capacitor C2 is connected to the resistor R1, and the other end is grounded; one end of the resistor R3 is connected to the positive electrode BAT+, and the other end is connected to the control chip U1; one end of the capacitor C3 is connected to the resistor R3, and the other end is grounded; one end of the capacitor C4 is connected to the resistor R6, and the other end is grounded; one end of the capacitor C13 is connected to the resistor R9, and the other end is grounded; one end of the capacitor C15 is connected to the resistor R14, and the other end is grounded; one end of the resistor R20 is connected to the capacitors C3, C4, C13, and C14, and the other end is connected to the MOS transistor Q9.

6. The intelligent ignition clamp for automobile emergency starting power supply according to claim 2, characterized in that: The voltage stabilizing circuit includes a diode D15, a diode D16, a resistor R37, a resistor R43, a capacitor C36, a capacitor C37, a capacitor C38, a capacitor C39, a capacitor C40 and a voltage regulator; capacitors C36, C37, and C38 are connected between the GND pin of the voltage regulator and the Vout pin of the voltage regulator, capacitors C39 and C40 are connected between the GND pin of the voltage regulator and the Vin pin of the voltage regulator, the GND pin of the voltage regulator is grounded, and the Vin pin of the voltage regulator is connected to the positive electrode BAT+ through a diode D16.

7. The intelligent ignition clamp for automobile emergency starting power supply according to claim 1, characterized in that: The controlled end of the MOS drive circuit is connected to the BMS protection system, and the output end is connected to the MOS switch circuit; the MOS drive circuit includes a resistor R2, a resistor R17, a resistor R19, a resistor R28, a resistor R29, a resistor R34, a resistor R39, a resistor R41, a resistor R44, a resistor R45, a capacitor C1, a transistor Q12 and a MOS transistor Q3, wherein the MOS transistor Q3 is connected to the D pole of the transistor Q12 through the resistor R17, the resistor R28 and the resistor R34, the G pole of the transistor Q12 is connected to the PWMH pin of the MCU control chip through the resistor R41, the S pole of the transistor Q12 is connected to the G pole of the transistor Q12 through the resistor R45, and the S pole of the transistor Q12 is grounded.

8. The intelligent ignition clamp for automobile emergency starting power supply according to claim 1, characterized in that: The protection board is also provided with a temperature sensor module, a power supply module circuit, and a boost / buck circuit; the controlled end of the temperature sensor module is connected to the NTC1 pin of the MCU control chip; the controlled end of the power supply module circuit is connected to the VDD pin of the MCU control chip, and the input end of the boost / buck circuit is connected to the MCU control chip.

9. The intelligent ignition clamp for automobile emergency starting power supply according to claim 1, characterized in that: The protection board is also provided with an indicator light circuit, a display screen display circuit and an LED lighting circuit. The controlled end of the indicator light circuit is connected to the PA3 and PA6 pins of the MCU control chip; the input end of the display screen display circuit is respectively connected to the DIG1, ​​DIG2 and DIG3 pins of the MCU control chip; the controlled end of the LED lighting circuit is connected to the LEDSW pin of the MCU control chip.

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