Device for preventing reverse power generation of automobile tail door motor and automobile

Abstract

The utility model discloses a device for preventing reverse power generation of an automobile tail door motor and a vehicle. The device comprises a reverse power generation prevention circuit, a turn-off circuit, a sampling circuit, a micro-control unit, a pre-drive chip and a full-bridge circuit. The anti-reverse circuit is electrically connected with the storage power supply and the base power supply respectively, the turn-off circuit is electrically connected with the anti-reverse circuit, the sampling circuit comprises a storage sampling circuit and a base sampling circuit, and the storage sampling circuit and the base sampling circuit are connected with the storage power supply and the base power supply respectively. The micro-control unit is respectively connected with the power storage sampling circuit and the base sampling circuit, meanwhile, the micro-control unit is electrically connected with the turn-off circuit, the pre-drive chip is electrically connected with the micro-control unit, and the full-bridge circuit is respectively and electrically connected with the base power supply, the pre-drive chip and the motor. According to the device for preventing reverse power generation of the automobile tail door motor and the vehicle, the problem that a circuit of a full-bridge mos tube is prone to being burnt out under the high-voltage condition can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile control, in particular to a reverse power generation device for preventing an automobile tailgate motor and a vehicle. Background Art

[0002] The electric tailgate can be opened and closed by electric control. The current SUV models are basically equipped with this function, which is convenient for users to take items from the trunk. The traditional tailgate is mechanical and is opened and closed manually by the user. The electric tailgate also has the characteristics of the mechanical tailgate. In the absence of electricity, manual closing is also allowed.

[0003] The electric tailgate is operated by the electric tailgate controller by driving a DC motor. Conventional motor control solutions generally use PWM (pulse width modulation) signal full-bridge drive control. In actual vehicle use and vehicle product line production, there will be scenarios where users manually close the electric tailgate with force. When the electric tailgate is closed with force, the motor will generate reverse power, and the product's large continuous high voltage pulse will cause damage to components on the controller circuit board, typically the full-bridge drive MOS tube (metal-oxide-semiconductor field-effect transistor), causing customer complaints and claims. Utility Model Content

[0004] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide a car tailgate motor reverse power generation device and a vehicle, which is used to solve the problem that the full-bridge MOS tube circuit is easily burned under high voltage conditions. The voltage generated by the reverse direction of the motor is used to power the controller, and then the controller drives the lower bridge MOS tube to conduct to achieve the effect of motor braking, thereby avoiding the generation of continuous high voltage to damage the controller components. At the same time, the controller is used to control the conduction of the triode on the power supply circuit, thereby turning off the anti-reverse MOS tube on the power supply circuit, achieving the effect of closing the power supply circuit.

[0005] The utility model provides a reverse power generation device for preventing a car tailgate motor from generating reverse power, comprising:

[0006] Turn off the circuit;

[0007] The sampling circuit includes a power storage sampling circuit and a base sampling circuit, wherein the input end of the power storage sampling circuit is connected to the output end of the power storage power supply, and the input end of the base sampling circuit is connected to the output end of the base power supply;

[0008] A micro control unit, wherein the input end of the micro control unit is respectively connected to the output end of the power storage sampling circuit and the output end of the base sampling circuit, and the output end of the micro control unit is connected to the input end of the shutdown circuit;

[0009] A pre-driver chip, the input end of the pre-driver chip is connected to the output end of the micro control unit;

[0010] A full-bridge circuit, wherein the input end of the full-bridge circuit is respectively connected to the output end of the pre-driver chip and the output end of the base power supply, and the output end of the full-bridge circuit is connected to the input end of the motor;

[0011] Among them, the sampling circuit collects the voltage signals of the storage power supply and the base power supply respectively, and inputs them to the micro control unit. The micro control unit controls the shutdown circuit according to the input signal. The micro control unit can send a signal to the pre-driver chip and connect the two lower bridges of the full-bridge circuit through the pre-driver chip.

[0012] In one embodiment of the utility model, it also includes an anti-reverse circuit, the input end of the anti-reverse circuit is connected to the output end of the storage power supply, the output end of the shutdown circuit is connected to the input end of the anti-reverse circuit, and the output end of the anti-reverse circuit is connected to the output end of the base power supply; the anti-reverse circuit includes a first transistor Q1, the first transistor Q1 is a MOS tube structure, the output end of the storage power supply is connected to the source of the first transistor Q1, the output end of the base power supply is connected to the drain of the first transistor Q1, and the micro control unit is connected to the gate of the first transistor Q1.

[0013] In one embodiment of the utility model, the shutdown circuit is a branch connecting the anti-reverse circuit and the micro control unit. The shutdown circuit includes a fifth resistor R5, a third transistor Q3 and a sixth resistor R6. The third transistor Q3 is an NPN-type triode. The C collector of the third transistor Q3 is electrically connected to the gate of Q1, and the B base of the third transistor Q3 is electrically connected to one end of the fifth resistor R5 and one end of the sixth resistor R6 respectively. The E emitter of the third transistor Q3 is connected to the other end of the sixth resistor R6 and is grounded. The other end of the fifth resistor R5 is connected to the output end of the micro control unit, and the micro control unit controls the voltage output to the shutdown circuit.

[0014] In one embodiment of the utility model, the full-bridge circuit includes a fourth transistor M1, a fifth transistor M2, a sixth transistor M3 and a seventh transistor M4. The fourth transistor M1, the fifth transistor M2, the sixth transistor M3 and the seventh transistor M4 are all MOS transistors (metal-oxide-semiconductor field-effect transistors). The drains of the fourth transistor M1 and the sixth transistor M3 are connected to the output end of the base power supply, the gates of the fourth transistor M1 and the sixth transistor M3 are connected to an external voltage source, respectively, the drains of the fourth transistor M1 and the sixth transistor M3 are connected to the sources of the fifth transistor M2 and the seventh transistor M4, respectively, the gates of the fifth transistor M2 and the seventh transistor M4 are connected to the external voltage source, respectively, the drains of the fifth transistor M2 and the seventh transistor M4 are connected to one end of the twelfth resistor R12, and the other end of R12 is grounded.

[0015] In one embodiment of the present invention, two ends of the motor are connected to the drains of the fourth transistor M1 and the sixth transistor M3 respectively.

[0016] In one embodiment of the utility model, the power storage sampling circuit includes a sixth diode D6, a seventh resistor R7, an eighth resistor R8 and a third capacitor C3. The sixth diode D6, the seventh resistor R7 and the eighth resistor R8 are connected in series and grounded in sequence. The third capacitor C3 is connected in parallel with the eighth resistor R8. The input end of the eighth resistor R8 is connected to the power storage power supply, and the output end of the sixth diode D6 is connected to the micro control unit.

[0017] In one embodiment of the utility model, the base sampling circuit includes a fifth diode D5, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11 and a fifth capacitor C5. The ninth resistor R9, the fifth diode D5, the tenth resistor R10 and the eleventh resistor R11 are connected in series in sequence, the fifth capacitor C5 is connected in parallel with the eleventh resistor R11, one end of the eleventh resistor R11 and the fifth capacitor C5 is connected to the base power supply and the other end is grounded, the output end of the fifth diode is connected to the micro control unit, and the base sampling circuit is connected in parallel with the power storage sampling circuit.

[0018] In one embodiment of the utility model, it also includes a first capacitor C1, a second capacitor C2 and a first diode D1, the first diode D1 is a bidirectional clamping diode, the first capacitor C1 and the second capacitor C2 are connected in series and in parallel with the first diode D1, the input end of the first capacitor C1 is connected to the power storage power supply, and the output end of the second capacitor C2 is grounded.

[0019] In one embodiment of the utility model, it also includes a first resistor R1, a second diode D2, a third diode D3 and a second transistor Q2, the second transistor Q2 is an NPN type triode, the first resistor R1 is connected in parallel with the second diode D2, the input end of the first resistor R1 is respectively connected to the storage power supply and the third diode D3, the output end of the first resistor R1 is respectively connected to the gate of the first transistor Q1, the C collector of the second transistor Q2 and the micro control unit, the second diode D2 is connected to the E emitter of the second transistor Q2, and the B base of the second transistor Q2 is grounded.

[0020] The utility model also provides a vehicle, comprising the above-mentioned anti-reverse power generation device for the automobile tailgate motor.

[0021] The utility model provides a device and a vehicle for preventing a car tailgate motor from generating electricity in reverse. The device collects voltage signals of a storage power supply and a base power supply through an acquisition circuit to analyze the circuit conditions. When the voltage difference between the two power supply signals is too large or the output voltage of one power supply is zero, a microcontroller unit controls the shutdown circuit to disconnect and sends a signal to a pre-drive chip to control the two lower bridges of the full-bridge circuit to conduct, thereby achieving the effect of motor braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of a car tailgate control circuit in the prior art;

[0024] Figure 2 A schematic diagram showing the working process of the anti-reverse power generation device for the automobile tailgate motor of the utility model;

[0025] Figure 3 This is a circuit diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0026] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0027] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0028] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0029] The utility model provides a reverse power generation device to prevent the tailgate motor of an automobile. Compared with the prior art, the utility model is different in that the voltage signals of the storage power supply and the base power supply are collected by the collection circuit to analyze the circuit situation. When the voltage difference between the two power supply signals is too large or the output voltage of one power supply is zero, the micro control unit controls the shutdown circuit to disconnect and sends a signal to the pre-drive chip to control the two lower bridges of the full-bridge circuit to be turned on, thereby achieving the effect of motor braking.

[0030] See also Figure 1-3 , showing the utility model of the anti-car tailgate motor reverse power generation device and the vehicle. The utility model of the anti-car tailgate motor reverse power generation device comprises an anti-reverse circuit, a shut-off circuit, a sampling circuit, a micro control unit, a pre-drive chip and a full-bridge circuit. The input end of the anti-reverse circuit is respectively connected to the storage power supply, and the output end of the anti-reverse circuit is connected to the base power supply; the output end of the shutdown circuit is connected to the input end of the anti-reverse circuit; the sampling circuit includes a storage sampling circuit and a base sampling circuit, the input end of the storage sampling circuit is connected to the output end of the storage power supply, and the input end of the base sampling circuit is connected to the output end of the base power supply; the input end of the micro control unit is respectively connected to the output end of the storage sampling circuit and the output end of the base sampling circuit, and the output end of the micro control unit is connected to the input end of the shutdown circuit; the input end of the pre-drive chip is connected to the output end of the micro control unit; the input end of the full-bridge circuit is respectively connected to the output end of the pre-drive chip and the output end of the base power supply, and the output end of the full-bridge circuit is connected to the input end of the motor; wherein the sampling circuit respectively collects voltage signals of the storage power supply and the base power supply, and inputs them to the micro control unit, the micro control unit controls the operation of the shutdown circuit according to the input signal, and the micro control unit can send a signal to the pre-drive chip, and make the two lower bridges of the full-bridge circuit conductively connected through the pre-drive chip.

[0031] like Figure 1 As shown, the electric tailgate is operated by the electric tailgate controller by driving a DC motor. As shown in the figure, the conventional motor control scheme generally adopts PWM signal full-bridge drive control. In actual vehicle use and vehicle product line production, there will be scenes where the user manually and forcefully closes the electric tailgate. When the electric tailgate is closed forcefully, the motor will generate reverse power, generating a large continuous high voltage pulse, causing damage to the components on the controller circuit board, typically the full-bridge driven MOS tube, causing customer complaints and claims. In order to solve the existing problems, based on the controller driving the motor action, a solution is provided to avoid the user manually closing the electric tailgate with force to generate reverse power generation of the electric tailgate motor. The utility model can avoid the problem of too long reverse charging time of the electric tailgate, and can greatly improve product reliability and customer satisfaction. The structure will be explained in detail below.

[0032] like Figure 2As shown, the utility model provides an anti-reverse power generation device for the tailgate motor of an automobile, which is obtained based on the existing tailgate power generation device of an automobile. The storage power supply (BAT) supplies power to the base power supply (VBB) through the anti-reverse circuit, and the base power supply supplies power to the full-bridge circuit to drive the full-bridge circuit to work, and the full-bridge circuit then drives the motor to rotate. However, since the driving principle of the electrode is similar to that of the engine, when the passenger manually closes the tailgate of the automobile, the motor rotates in reverse and generates a reverse current. This reverse electromotive force will cause great damage to the motor. Therefore, in the utility model, an anti-reverse circuit, a sampling circuit, a micro control unit (MCU), a shutdown circuit and a pre-drive chip are added to control the operation of the circuit system, while ensuring the normal operation of the motor (M) to prevent the generation of reverse voltage and the circuit from being burned. The sampling circuit includes a storage sampling circuit and a base sampling circuit, one end of the storage sampling circuit and the base sampling circuit are respectively connected to the storage power supply and the base power supply, and the other end of the storage sampling circuit and the base sampling circuit are connected to the micro control unit. The storage sampling circuit and the base sampling circuit can collect the voltage signals of the storage power supply and the base power supply and output them to the micro control unit, and perform signal analysis in the micro control unit. The anti-reverse circuit is arranged between the storage power supply and the base power supply, and can disconnect the connection between the storage power supply and the base power supply. The shutdown circuit is respectively connected to the micro control unit and the anti-reverse circuit, and the signal output by the micro control unit can control the disconnection and connection of the anti-reverse circuit. The pre-driver chip is respectively connected to the micro control unit and the full-bridge circuit, and the pre-driver chip can receive the signal output by the micro control unit and control the two lower bridges of the full-bridge circuit to be turned on, thereby achieving the effect of motor braking.

[0033] Further, how to solve the problem of burning the full-bridge circuit is described. In one embodiment of the utility model, when the storage power supply is not powered, the passenger manually operates the tailgate to cause the motor to generate a reverse electromotive force, which supplies power to the controller micro-control unit. At this time, the micro-control unit will sample the storage power supply and the base power supply. If it is detected that the storage power supply is zero, and the base power supply is powered, the micro-control unit can determine that the motor has reverse power generation. At this time, the micro-control unit monitors the base power supply voltage value through the base sampling circuit. If the voltage value exceeds 20V, the micro-control unit sends a signal to the pre-drive chip to control the two lower bridges in the full-bridge circuit to conduct and short-circuit, which plays the role of motor braking. When the storage power supply is powered by a battery, manually operating the tailgate will cause the motor to generate a reverse electromotive force. At this time, the micro-control unit will sample the storage power supply and the base power supply. The micro-control unit determines that if there is a voltage in the storage power supply, and when it is detected that the voltage difference between the base power supply and the storage power supply exceeds 7V, the micro-control unit can determine that the motor has reverse power generation. At this time, if the voltage value of the base power supply is detected to be over 20V through the base sampling circuit, the micro control unit will send a signal to the pre-drive chip to control the short circuit of the two lower bridge terminals in the full-bridge circuit, thereby acting as a motor brake. The following describes how to solve the problem of overcurrent burning the anti-reverse circuit. In one embodiment of the utility model, when the storage power supply is not powered by a battery, the micro control unit detects the presence of voltage in the base power supply through the base sampling circuit, and the micro control unit controls the shutdown circuit to close the anti-reverse circuit, thereby closing the loop that powers the power supply to the external load, thereby avoiding the overcurrent burning of the anti-reverse circuit due to excessive external load.

[0034] Figure 3The specific circuit diagram corresponding to an embodiment of the utility model is illustrated. The anti-reverse circuit includes a first transistor Q1, which is a MOS tube structure and plays an anti-reverse role. The storage power supply is connected to the source of the first transistor Q1, the base power supply is connected to the drain of the first transistor Q1, and the micro control unit is connected to the gate of the first transistor Q1. The shutdown circuit is a branch between the anti-reverse circuit and the micro control unit. The shutdown circuit includes a fifth resistor R5, a third transistor Q3 and a sixth resistor R6. The third transistor Q3 is an NPN type triode. The C collector of the third transistor Q3 is electrically connected to the gate of Q1, the B base of the third transistor Q3 is electrically connected to one end of the fifth resistor R5 and one end of the sixth resistor R6, respectively, and the E emitter of the third transistor Q3 is respectively connected to the other end of the sixth resistor R6 and the ground. R6 can ensure that the transistor is in a stable state, and Q3 is a switch tube. The other end of the fifth resistor R5 is connected to the micro control unit, and the micro control unit controls the voltage output to the shutdown circuit. The full bridge circuit includes a fourth transistor M1, a fifth transistor M2, a sixth transistor M3 and a seventh transistor M4. The fourth transistor M1, the fifth transistor M2, the sixth transistor M3 and the seventh transistor M4 are all MOS tubes. The drains of the fourth transistor M1 and the sixth transistor M3 are connected to the base power supply, the gates of the fourth transistor M1 and the sixth transistor M3 are respectively connected to the external voltage source, the drains of the fourth transistor M1 and the sixth transistor M3 are respectively connected to the source of the fifth transistor M2 and the seventh transistor M4, the gates of the fifth transistor M2 and the seventh transistor M4 are respectively connected to the external voltage source, the drains of the fifth transistor M2 and the seventh transistor M4 are connected to one end of the twelfth resistor R12, and the other end of R12 is grounded, which plays a role in current detection. The two ends of the motor are respectively connected to the drains of the fourth transistor M1 and the sixth transistor M3. The storage sampling circuit includes a sixth diode D6, a seventh resistor R7, an eighth resistor R8 and a third capacitor C3. The sixth diode D6, the seventh resistor R7 and the eighth resistor R8 are connected in series in sequence, and the third capacitor C3 is connected in parallel with the eighth resistor R8. The fourth diode D4 is located at the port of the micro control unit, and the third diode D3, the fourth diode D4, the fifth diode D5 and the sixth diode D6 have the effect of preventing voltage backflow. The base sampling circuit includes the fifth diode D5, the ninth resistor R9, the tenth resistor R10, the eleventh resistor R11 and the fifth capacitor C5. The fifth diode D5, the ninth resistor R9, the tenth resistor R10 and the eleventh resistor R11 are connected in series in sequence, the fifth capacitor C5 is connected in parallel with the eleventh resistor R11, and the base sampling circuit is connected in parallel with the storage sampling circuit. When the tailgate is opened, M1 and M4 are controlled to be turned on by the micro control unit. When the tailgate is closed, M2 and M3 are controlled to be turned on by the micro control unit. When the power supply end of the storage power supply is disconnected, the tailgate is manually operated, and the motor generates a reverse voltage that is transmitted to the base power supply through M1 or M2. After the base power supply supplies power to the micro control unit, Q1 is turned on, so that there is a voltage at the power supply end.When the microcontroller starts working, it will connect the BAT_30A AD and VBB_AD ports (such as. Figure 2 As shown in the figure, the voltage values ​​at two positions are collected and judged. When the base power supply voltage exceeds the storage power supply voltage by more than 7V, the microcontroller unit determines that the motor is generating abnormally. At this time, if the base power supply voltage exceeds 20V, the microcontroller unit immediately sends a command to the pre-drive chip to turn on M2 and M4 to brake the motor. That is, no continuous larger voltage will be generated.

[0035] Furthermore, to ensure the normal operation of the circuit, the utility model also includes a first capacitor C1, a second capacitor C2 and a first diode D1. The first diode D1 is a bidirectional clamping diode, which plays a role in clamping the high pulse voltage on the power supply. The first capacitor C1 and the second capacitor C2 are connected in series and in parallel with the first diode D1. The input end of the first capacitor C1 is connected to the storage power supply, and the output end of the second capacitor C2 is grounded. The above structure can absorb static electricity and protect the overall safety of the circuit. The utility model also includes a first resistor R1, a second diode D2, a third diode D3 and a second transistor Q2. The second transistor Q2 is an NPN-type triode, and the second diode D2 is a unidirectional clamping diode, which plays a role in clamping. The first resistor R1 is connected in parallel with the second diode D2, the input end of the first resistor R1 is connected to the storage power supply and the third diode D3 respectively, the output end of the first resistor R1 is connected to the gate of the first transistor Q1, the C collector of the second transistor Q2 and the micro control unit respectively, the second diode D2 is connected to the E emitter of the second transistor Q2, and the B base of the second transistor Q2 is grounded. This structure can actively control the conduction of the circuit.

[0036] The utility model also includes a vehicle, which includes the above-mentioned anti-reverse power generation device for the automobile tailgate motor.

[0037] The utility model discloses a device and a vehicle for preventing a car tailgate motor from generating electricity in reverse. The device collects the voltage signals of a storage power supply and a base power supply through a collection circuit to analyze the circuit situation. When the voltage difference between the two power supply signals is too large or the output voltage of one power supply is zero, the microcontroller unit controls the shutdown circuit to disconnect and sends a signal to a pre-drive chip to control the two lower bridges of the full-bridge circuit to conduct, thereby achieving the effect of motor braking.

[0038] Therefore, the anti-reverse power generation device for the automobile tailgate motor and the vehicle of the utility model can solve the problem in the prior art that the circuit of the full-bridge MOS tube is easily burned under high voltage conditions.

[0039] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A reverse power generation device to prevent the motor of a car tailgate from turning reverse, characterized in that: include: Turn off the circuit; A sampling circuit, wherein the sampling circuit comprises a power storage sampling circuit and a base sampling circuit, wherein the input end of the power storage sampling circuit is connected to the output end of the power storage power supply, and the input end of the base sampling circuit is connected to the output end of the base power supply; A micro control unit, wherein the input end of the micro control unit is respectively connected to the output end of the power storage sampling circuit and the output end of the base sampling circuit, and the output end of the micro control unit is connected to the input end of the shutdown circuit; A pre-driver chip, the input end of the pre-driver chip is connected to the output end of the micro control unit; A full-bridge circuit, wherein the input end of the full-bridge circuit is respectively connected to the output end of the pre-driver chip and the output end of the base power supply, and the output end of the full-bridge circuit is connected to the input end of the motor; Among them, the sampling circuit respectively collects the voltage signals of the storage power supply and the base power supply, and inputs them to the micro control unit. The micro control unit controls the shutdown circuit according to the input signal. The micro control unit can send a signal to the pre-driver chip, and make the two lower bridges of the full-bridge circuit conductively connected through the pre-driver chip.

2. The anti-reverse power generation device for automobile tailgate motor according to claim 1, characterized in that: The invention also includes an anti-reverse circuit, wherein the input end of the anti-reverse circuit is connected to the output end of the storage power supply, the output end of the shutdown circuit is connected to the input end of the anti-reverse circuit, and the output end of the anti-reverse circuit is connected to the output end of the base power supply; the anti-reverse circuit includes a first transistor (Q1), the first transistor (Q1) is a MOS tube structure, the output end of the storage power supply is connected to the source of the first transistor (Q1), the output end of the base power supply is connected to the drain of the first transistor (Q1), and the micro control unit is connected to the gate of the first transistor (Q1).

3. The anti-reverse power generation device for the automobile tailgate motor according to claim 2, characterized in that: The shutdown circuit is a branch connecting the anti-reverse circuit and the micro control unit, and the shutdown circuit includes a fifth resistor (R5), a third transistor (Q3) and a sixth resistor (R6). The third transistor (Q3) is an NPN-type triode. The C collector of the third transistor (Q3) is electrically connected to the gate of the first transistor (Q1). The B base of the third transistor (Q3) is electrically connected to one end of the fifth resistor (R5) and one end of the sixth resistor (R6), respectively. The E emitter of the third transistor (Q3) is connected to the other end of the sixth resistor (R6) and is grounded. The other end of the fifth resistor (R5) is connected to the output end of the micro control unit. The micro control unit controls the voltage output to the shutdown circuit.

4. The anti-reverse power generation device for automobile tailgate motor according to claim 1, characterized in that: The full-bridge circuit comprises a fourth transistor (M1), a fifth transistor (M2), a sixth transistor (M3) and a seventh transistor (M4), wherein the fourth transistor (M1), the fifth transistor (M2), the sixth transistor (M3) and the seventh transistor (M4) are all MOS transistors, the drains of the fourth transistor (M1) and the sixth transistor (M3) are connected to the output end of the base power supply, the gates of the fourth transistor (M1) and the sixth transistor (M3) are respectively connected to an external voltage source, the drains of the fourth transistor (M1) and the sixth transistor (M3) are respectively connected to the sources of the fifth transistor (M2) and the seventh transistor (M4), the gates of the fifth transistor (M2) and the seventh transistor (M4) are respectively connected to the external voltage source, the drains of the fifth transistor (M2) and the seventh transistor (M4) are connected to one end of a twelfth resistor (R12), and the other end of the twelfth resistor (R12) is grounded.

5. The anti-reverse power generation device for the automobile tailgate motor according to claim 4, characterized in that: The motor is connected to the drain of the fourth transistor (M1) and the drain of the sixth transistor (M3) respectively.

6. The anti-reverse power generation device for automobile tailgate motor according to claim 1, characterized in that: The power storage sampling circuit comprises a sixth diode (D6), a seventh resistor (R7), an eighth resistor (R8) and a third capacitor (C3); the sixth diode (D6), the seventh resistor (R7) and the eighth resistor (R8) are connected in series and grounded in sequence; the third capacitor (C3) is connected in parallel with the eighth resistor (R8); the input end of the eighth resistor (R8) is connected to the power storage power supply; and the output end of the sixth diode (D6) is connected to the micro control unit.

7. The anti-reverse power generation device for the automobile tailgate motor according to claim 6, characterized in that: The base sampling circuit comprises a fifth diode (D5), a ninth resistor (R9), a tenth resistor (R10), an eleventh resistor (R11) and a fifth capacitor (C5); the ninth resistor (R9), the fifth diode (D5), the tenth resistor (R10) and the eleventh resistor (R11) are connected in series in sequence; the fifth capacitor (C5) is connected in parallel with the eleventh resistor (R11); one end of the eleventh resistor (R11) and the fifth capacitor (C5) is connected to the base power supply and the other end is grounded; the output end of the fifth diode is connected to the micro control unit; and the base sampling circuit is connected in parallel with the power storage sampling circuit.

8. The anti-reverse power generation device for automobile tailgate motor according to claim 1, characterized in that: The invention also comprises a first capacitor (C1), a second capacitor (C2) and a first diode (D1), wherein the first diode (D1) is a bidirectional clamping diode, the first capacitor (C1) and the second capacitor (C2) are connected in series and in parallel with the first diode (D1), the input end of the first capacitor (C1) is connected to the power storage power source, and the output end of the second capacitor (C2) is grounded.

9. The anti-reverse power generation device for the automobile tailgate motor according to claim 2, characterized in that: The invention also comprises a first resistor (R1), a second diode (D2), a third diode (D3) and a second transistor (Q2), wherein the second transistor (Q2) is an NPN-type triode, the first resistor (R1) and the second diode (D2) are connected in parallel, the input end of the first resistor (R1) is respectively connected to a power storage power source and the third diode (D3), the output end of the first resistor (R1) is respectively connected to the gate of the first transistor (Q1), the C collector of the second transistor (Q2) and the micro control unit, the second diode (D2) is connected to the E emitter of the second transistor (Q2), and the B base of the second transistor (Q2) is grounded.

10. A vehicle, characterized in that: The invention comprises the anti-reverse power generation device for automobile tailgate motor according to any one of claims 1 to 9.

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