A method and system for handling out-of-control of a hydrogen fuel vehicle drive motor

Abstract

The present invention discloses a method and system for handling the out-of-control of a hydrogen fuel vehicle drive motor. The out-of-control handling method comprises the following steps: obtaining the target torque of the drive motor, the speed of the drive motor and the actual torque of the drive motor; judging whether the drive motor is in an out-of-control state according to the data of the target torque, the speed of the drive motor and the actual torque; if it is judged that the drive motor is in an out-of-control state, the drive motor out-of-control handling is entered, and the power supply of the drive motor is cut off by controlling the output power of the motor power supply device and then disconnecting the internal circuit of the motor power supply device, so as to stop the drive motor from outputting torque to the outside. The out-of-control handling system has good safety and high reliability; the out-of-control handling method can quickly, effectively and accurately judge whether the drive motor is in an out-of-control state; when the drive motor is in an out-of-control state, the corresponding out-of-control handling can be carried out in a timely and effective manner, thereby ensuring the safety of the vehicle and personal safety.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen fuel vehicle, and in particular to a method and system for handling loss of control of a driving motor of a hydrogen fuel vehicle. Background Art

[0002] As the world vigorously advocates the development of hydrogen energy strategy, a wave of hydrogen fuel cell vehicles has been set off at home and abroad, and a large number of hydrogen fuel cell vehicles have been gradually developed and put on the market. With the development of more and more hydrogen fuel cell vehicles, a large number of motor drive systems are installed on the whole vehicle for debugging and mass production during the development and mass production stages. Since many motor drive systems have not yet been mass-produced, the stability and safety of the products cannot be guaranteed, and there is a situation where the motor drive system is out of control abnormally, which brings great uncertainty to the safety of the vehicle. Therefore, it is necessary to design a simple, efficient and reliable out-of-control processing method and system in a targeted manner, so that corresponding measures can be taken to protect driving safety when the motor drive system is out of control abnormally. Summary of the invention

[0003] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art and to provide a simple, efficient, highly accurate and highly reliable method and system for handling runaway of a hydrogen fuel cell vehicle drive motor.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A method for handling a runaway hydrogen fuel vehicle drive motor comprises the following steps:

[0006] The vehicle controller obtains the target torque data of the drive motor through the positions of the brake pedal and the accelerator pedal. The vehicle controller obtains the data of the drive motor speed and the actual torque of the drive motor through the drive motor controller, and determines whether the drive motor is in an out-of-control state based on the obtained data.

[0007] If it is determined that the drive motor is in an out-of-control state, the out-of-control processing of the drive motor is performed, the vehicle controller controls the output power of the motor power supply device, and then disconnects the internal circuit of the motor power supply device to cut off the power supply of the drive motor and stop the drive motor from outputting torque to the outside.

[0008] Preferably, the process of judging whether the drive motor is out of control includes the following steps:

[0009] If the target torque is 0, when the absolute value of the speed of the driving motor increases over time for M consecutive frames and the rate of change of the speed of the driving motor is greater than a first set value, it is determined that the driving motor is in an out-of-control state;

[0010] If the target torque is not 0, and the direction of the target torque is opposite to the direction of the actual torque, then when the absolute value of the speed of the drive motor increases over time for M consecutive frames and the rate of change of the speed of the drive motor is greater than a second set value, it is determined that the drive motor is in an out-of-control state;

[0011] If the target torque is not 0 and the direction of the target torque is the same as the direction of the actual torque, then when the difference between the absolute value of the actual torque and the absolute value of the target torque is greater than a third set value, it is determined that the drive motor is in an out-of-control state.

[0012] Preferably, the value of M is 3-5.

[0013] Preferably, the first setting value is 200 rpm / s; the second setting value is 50 rpm / s; and the third setting value is 6 N.m.

[0014] Preferably, the motor power supply device includes an auxiliary energy system, a hydrogen fuel cell system and a high-voltage power distribution system, the input end of the high-voltage power distribution system is electrically connected to the auxiliary energy system and the hydrogen fuel cell system, respectively, and the output end thereof is electrically connected to the drive motor controller; the drive motor controller is electrically connected to the drive motor; the whole vehicle controller is electrically connected to the auxiliary energy system, the hydrogen fuel cell system and the high-voltage power distribution system, respectively; wherein, the out-of-control handling process of the drive motor is as follows: when the drive motor is in an out-of-control state, the whole vehicle controller controls the output power of the hydrogen fuel cell system and the auxiliary energy system to be 0 by sending instructions to the hydrogen fuel cell system and the auxiliary energy system; at the same time, the whole vehicle controller presets a delay time to delay cutting off the internal circuits of the high-voltage power distribution system, the hydrogen fuel cell system and the auxiliary energy system, so as to cut off the power supply of the drive motor and stop the drive motor from outputting torque to the outside.

[0015] Preferably, the preset delay time is 100ms to ensure that when the internal circuits of the high-voltage power distribution system, the hydrogen fuel cell system and the auxiliary energy system are cut off, the output power of the hydrogen fuel cell system and the auxiliary energy system has dropped to 0.

[0016] A runaway processing system for a hydrogen fuel cell vehicle drive motor, the runaway processing system applies the method as described above, the runaway processing system comprises a vehicle controller, an auxiliary energy system, a hydrogen fuel cell system, a high-voltage power distribution system and a motor drive system; the motor drive system comprises a drive motor controller and a drive motor, the drive motor controller is electrically connected to the drive motor; the input end of the high-voltage power distribution system is electrically connected to the auxiliary energy system and the hydrogen fuel cell system respectively, and the output end thereof is electrically connected to the motor drive system; a first high-voltage contactor is provided in the high-voltage power distribution system, the first high-voltage contactor is serially connected to the internal circuit of the high-voltage power distribution system; a second high-voltage contactor is provided in the hydrogen fuel cell system, the second high-voltage contactor The contactor is connected in series to the internal circuit of the hydrogen fuel cell system; the auxiliary energy system is provided with a third high-voltage contactor, and the third high-voltage contactor is connected in series to the internal circuit of the auxiliary energy system; the whole vehicle controller is electrically connected to the first high-voltage contactor, the second high-voltage contactor, the third high-voltage contactor, the hydrogen fuel cell system, the auxiliary energy system, the high-voltage power distribution system and the drive motor controller respectively, and controls the opening or closing of the first high-voltage contactor, the second high-voltage contactor and the third high-voltage contactor to cut off or connect the internal circuit of the high-voltage power distribution system, the hydrogen fuel cell system and the auxiliary energy system; the whole vehicle controller is used to obtain the target torque of the drive motor, the speed of the drive motor and the actual torque of the drive motor.

[0017] Preferably, the vehicle controller includes a timing module; a delay time is preset by the timing module to delay cutting off the internal circuits of the high-voltage power distribution system, the hydrogen fuel cell system and the auxiliary energy system.

[0018] Preferably, the hydrogen fuel cell system, auxiliary energy system, high-voltage power distribution system and drive motor controller are all electrically connected to the vehicle controller via a CAN bus.

[0019] Preferably, the auxiliary energy system includes one or both of a supercapacitor system and a power battery system.

[0020] The present invention discloses a method and system for handling the out-of-control of a hydrogen fuel vehicle drive motor. The out-of-control handling method is to efficiently obtain the target torque, drive motor speed and actual torque of the drive motor through the vehicle controller; and can quickly determine whether the drive motor is in an out-of-control state based on the acquired target torque, drive motor speed and actual torque data. When the drive motor is in an out-of-control state, the vehicle controller can respond quickly by controlling the output power of the motor power supply device, and then disconnecting the internal circuit of the motor power supply device to cut off the power supply of the drive motor, stop the drive motor from outputting torque to the outside, and ensure vehicle safety and personal safety when the drive motor is out of control. The out-of-control processing system is to set a high-voltage contactor on the internal circuit of the high-voltage power distribution system, the auxiliary energy system and the hydrogen fuel cell system, and electrically connect the high-voltage contactor to the vehicle controller. When the driving motor of the hydrogen fuel vehicle is abnormally out of control, the vehicle controller controls the output power of the auxiliary energy system and the hydrogen fuel cell system, and then the vehicle controller disconnects the high-voltage contactor on the internal circuit of the high-voltage power distribution system, the auxiliary energy system and the hydrogen fuel cell system, thereby safely cutting off the internal circuit of the high-voltage power distribution system, the auxiliary energy system and the hydrogen fuel cell system, thereby cutting off the power supply of the driving motor, and the driving motor stops outputting torque to the outside, thereby ensuring driving safety. A method and system for out-of-control processing of a driving motor of a hydrogen fuel vehicle of the present invention can quickly, effectively and accurately determine whether the driving motor is in an out-of-control state; when the driving motor is in an out-of-control state, the corresponding out-of-control processing can be carried out in a timely and effective manner, thereby ensuring vehicle safety and personal safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a schematic structural diagram of a runaway processing system for a hydrogen fuel cell vehicle drive motor according to an embodiment of the present invention.

[0022] Description of the markings in the figure:

[0023] 1. Vehicle controller; 11. Timing module; 2. Auxiliary energy system; 3. Hydrogen fuel cell system; 4. High-voltage power distribution system; 5. Motor drive system; 51. Drive motor controller; 52. Drive motor; 6. First high-voltage contactor; 7. Second high-voltage contactor; 8. Third high-voltage contactor. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] Example 1

[0026] like Figure 1As shown, a runaway handling system for a hydrogen fuel vehicle drive motor of the present invention comprises a vehicle controller 1, an auxiliary energy system 2, a hydrogen fuel cell system 3, a high-voltage power distribution system 4 and a motor drive system 5; the motor drive system 5 comprises a drive motor controller 51 and a drive motor 52, and the drive motor controller 51 is electrically connected to the drive motor 52; the input end of the high-voltage power distribution system 4 is electrically connected to the auxiliary energy system 2 and the hydrogen fuel cell system 3, respectively, and the output end thereof is electrically connected to the motor drive system 5; a first high-voltage contactor 6 is provided in the high-voltage power distribution system 4, and the first high-voltage contactor 6 is connected in series to the internal circuit of the high-voltage power distribution system 4; a second high-voltage contactor 7 is provided in the hydrogen fuel cell system 3, and the second high-voltage contactor 7 is connected in series to the internal circuit of the hydrogen fuel cell system 3; a third high-voltage contactor 8 is provided in the auxiliary energy system 2, and the third high-voltage contactor 8 is connected in series to the internal circuit of the auxiliary energy system 2; the vehicle controller 1 is divided into The vehicle controller 1 is electrically connected to the first high-voltage contactor 6, the second high-voltage contactor 7 and the third high-voltage contactor 8 respectively, and controls the opening or closing of the first high-voltage contactor 6, the second high-voltage contactor 7 and the third high-voltage contactor 8 to cut off or connect the internal circuits of the high-voltage power distribution system 4, the hydrogen fuel cell system 3 and the auxiliary energy system 2; the vehicle controller 1 is electrically connected to the hydrogen fuel cell system 3, the auxiliary energy system 2 and the high-voltage power distribution system 4 respectively, so that the vehicle controller 1 can obtain information such as voltage and current in the high-voltage power distribution system 4, the hydrogen fuel cell system 3 and the auxiliary energy system 2, so as to determine whether the internal circuits of the high-voltage power distribution system 4, the hydrogen fuel cell system 3 and the auxiliary energy system 2 are disconnected; the vehicle controller 1 can control the output power of the auxiliary energy system 2 and the fuel cell system by issuing instructions; the vehicle controller 1 is used to obtain the target torque of the drive motor 52, the drive motor speed and the actual torque of the drive motor 52.

[0027] The out-of-control handling system is implemented by connecting the first high-voltage contactor 6, the second high-voltage contactor 7 and the third high-voltage contactor 8 in series to the internal circuits of the high-voltage distribution system 4, the hydrogen fuel cell system 3 and the auxiliary energy system 2 of the high-voltage distribution system 4, respectively, and electrically connecting the first high-voltage contactor 6, the second high-voltage contactor 7 and the third high-voltage contactor 8 to the vehicle controller 1. When the drive motor 52 of the hydrogen fuel vehicle is abnormally out of control, the vehicle controller 1 controls the output power of the hydrogen fuel cell system and the auxiliary energy system; then the vehicle controller 1 controls the first high-voltage contactor 6, the second high-voltage contactor 7 and the third high-voltage contactor 8 to be disconnected, and cuts off the internal circuits of the high-voltage distribution system 4, the hydrogen fuel cell system 3 and the auxiliary energy system 2, thereby safely cutting off the power supply of the drive motor 52, and the drive motor 52 stops outputting torque to the outside, thereby ensuring driving safety and improving the safety and reliability of the vehicle during driving.

[0028] The vehicle controller 1 may include a timing module 11 , and a delay time may be preset through the timing module 11 to achieve delayed disconnection of the internal circuits of the high-voltage power distribution system 4 , the hydrogen fuel cell system 3 and the auxiliary energy system 2 .

[0029] The hydrogen fuel cell system 3, the auxiliary energy system 2, the high-voltage power distribution system 4 and the drive motor controller 51 can all be electrically connected to the vehicle controller 1 via the CAN bus, which can improve the reliability of the entire system during use.

[0030] There can be many types of auxiliary energy system 2, which are not limited here. The auxiliary energy system 2 can include one or both of a supercapacitor system and a power battery system; the auxiliary energy system 2 can meet the energy needs of hydrogen fuel vehicles under different operating conditions.

[0031] A method for handling a runaway motor of a hydrogen fuel vehicle of the present invention is applied to the above-mentioned runaway handling system, and specifically includes the following steps:

[0032] The vehicle controller 1 obtains the target torque of the drive motor 52 through the positions of the brake pedal and the accelerator pedal; the vehicle controller 1 obtains the drive motor speed and the actual torque of the drive motor through the drive motor controller 51;

[0033] When the target torque obtained by the vehicle controller 1 is 0, if the absolute value of the driving motor speed increases with time for three consecutive frames and the rate of change of the driving motor speed is greater than 200rpm / s, the vehicle controller 1 determines that the driving motor is in an out-of-control state, and the vehicle controller 1 sends instructions to the hydrogen fuel cell system 3 and the auxiliary energy system 2 to control the output power of the hydrogen fuel cell system 3 and the auxiliary energy system 2 to be 0; at the same time, the timing module 11 starts to count down, and after the countdown reaches the preset delay time of 100ms, the vehicle controller 1 disconnects the first high-voltage contactor 6, the second high-voltage contactor 7 and the third high-voltage contactor 8 to cut off the internal circuits of the high-voltage power distribution system 4, the hydrogen fuel cell system 3 and the auxiliary energy system 2, the power supply of the driving motor 52 is cut off, and the driving motor 52 stops outputting torque to the outside.

[0034] When the target torque obtained by the vehicle controller 1 is not 0, and the direction of the target torque is opposite to the direction of the actual torque, if the absolute value of the drive motor speed increases with time for 3 consecutive frames and the change rate of the drive motor speed is greater than 50rpm / s, it is judged that the drive motor is in an out-of-control state; the vehicle controller 1 sends instructions to the hydrogen fuel cell system 3 and the auxiliary energy system 2 to control the output power of the hydrogen fuel cell system 3 and the auxiliary energy system 2 to be 0; at the same time, the timing module 11 starts counting down, and after the countdown reaches the preset delay time of 100ms, the vehicle controller 1 disconnects the first high-voltage contactor 6, the second high-voltage contactor 7 and the third high-voltage contactor 8 to cut off the internal circuits of the high-voltage power distribution system 4, the hydrogen fuel cell system 3 and the auxiliary energy system 2, the power supply of the drive motor 52 is cut off, and the drive motor 52 stops outputting torque to the outside.

[0035] When the target torque obtained by the vehicle controller 1 is not 0, and the direction of the target torque is the same as the direction of the actual torque, if the difference between the absolute value of the actual torque and the absolute value of the target torque is greater than 6N.m and lasts for a period of time, in this embodiment, this duration can be set to 1s, then it is judged that the drive motor is in an out-of-control state; the vehicle controller 1 sends instructions to the hydrogen fuel cell system 3 and the auxiliary energy system 2 to control the output power of the hydrogen fuel cell system 3 and the auxiliary energy system 2 to be 0; at the same time, the timing module 11 starts countdown, and after the countdown reaches the preset delay time of 100ms, the vehicle controller 1 disconnects the first high-voltage contactor 6, the second high-voltage contactor 7 and the third high-voltage contactor 8 to cut off the internal circuits of the high-voltage power distribution system 4, the hydrogen fuel cell system 3 and the auxiliary energy system 2, the power supply of the drive motor 52 is cut off, and the drive motor 52 stops outputting torque to the outside.

[0036] The preset delay time can be 100ms, which reserves time for the hydrogen fuel cell system 3 and the auxiliary energy system 2 to respond to the controller instructions, and can ensure that when the instruction to disconnect the high-voltage contactor is executed, the output power of the hydrogen fuel cell system 3 and the auxiliary energy system 2 has dropped to 0, and the voltage and current on the internal circuits of the hydrogen fuel cell system 3, the auxiliary energy system 2 and the high-voltage distribution system 4 are greatly reduced, so that during the disconnection process of the high-voltage contactor, the high-voltage contactor contacts will not be adhered or burned due to excessive instantaneous current, thereby ensuring the service life of the high-voltage contactor, and also reducing the damage to the hydrogen fuel cell system 3, the auxiliary energy system 2 and the high-voltage distribution system 4, ensuring the safety of out-of-control processing.

[0037] In another possible implementation, in the process of judging whether the drive motor is in an out-of-control state, the absolute value of the drive motor speed for 5 consecutive frames or 4 consecutive frames can be used as a measure to increase over time. The specific process is as follows: when the target torque obtained by the vehicle controller 1 is 0, if the absolute value of the drive motor speed for 4 consecutive frames or 5 frames increases over time and the rate of change of the drive motor speed is greater than 200rpm / s, the vehicle controller 1 determines that the drive motor is in an out-of-control state, and the vehicle controller 1 sends instructions to the hydrogen fuel cell system 3 and the auxiliary energy system 2 to control the output power of the hydrogen fuel cell system 3 and the auxiliary energy system 2 to be 0; at the same time, the timing module 11 starts to count down, and after the countdown reaches the preset delay time of 100ms, the vehicle controller 1 disconnects the first high-voltage contactor 6, the second high-voltage contactor 7 and the third high-voltage contactor 8 to cut off the internal circuits of the high-voltage power distribution system 4, the hydrogen fuel cell system 3 and the auxiliary energy system 2, and the power supply of the drive motor 52 is cut off, and the drive motor 52 stops outputting torque to the outside.

[0038] When the target torque obtained by the vehicle controller 1 is not 0, and the direction of the target torque is opposite to the direction of the actual torque, if the absolute value of the drive motor speed increases over time for 4 or 5 consecutive frames and the rate of change of the drive motor speed is greater than 50rpm / s, it is judged that the drive motor is in an out-of-control state; the vehicle controller 1 sends instructions to the hydrogen fuel cell system 3 and the auxiliary energy system 2 to control the output power of the hydrogen fuel cell system 3 and the auxiliary energy system 2 to be 0; at the same time, the timing module 11 starts counting down, and after the countdown reaches the preset delay time of 100ms, the vehicle controller 1 disconnects the first high-voltage contactor 6, the second high-voltage contactor 7 and the third high-voltage contactor 8 to cut off the internal circuits of the high-voltage power distribution system 4, the hydrogen fuel cell system 3 and the auxiliary energy system 2, the power supply of the drive motor 52 is cut off, and the drive motor 52 stops outputting torque to the outside.

[0039] For matters not mentioned above, the prior art applies.

[0040] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art to which the present invention belongs may make various modifications or supplements to the specific embodiments described or replace them in a similar manner, but they will not deviate from the direction of the present invention or exceed the scope defined by the attached claims. Those skilled in the art should understand that any modifications, equivalent substitutions, improvements, etc. made to the above embodiments based on the technical essence of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for handling a runaway hydrogen fuel vehicle drive motor, characterized in that: The following steps are involved: The vehicle controller obtains the target torque data of the drive motor through the positions of the brake pedal and the accelerator pedal. The vehicle controller obtains the data of the drive motor speed and the actual torque of the drive motor through the drive motor controller, and determines whether the drive motor is in an out-of-control state based on the obtained data. If it is determined that the drive motor is in an out-of-control state, the out-of-control processing of the drive motor is performed, the vehicle controller controls the output power of the motor power supply device, and then disconnects the internal circuit of the motor power supply device to cut off the power supply of the drive motor and stop the drive motor from outputting torque to the outside; The process of judging whether the drive motor is out of control includes the following steps: If the target torque is 0, when the absolute value of the speed of the driving motor increases over time for M consecutive frames and the rate of change of the speed of the driving motor is greater than a first set value, it is determined that the driving motor is in an out-of-control state; If the target torque is not 0, and the direction of the target torque is opposite to the direction of the actual torque, then when the absolute value of the speed of the drive motor increases over time for M consecutive frames and the rate of change of the speed of the drive motor is greater than a second set value, it is determined that the drive motor is in an out-of-control state; If the target torque is not 0, and the direction of the target torque is the same as the direction of the actual torque, then when the difference between the absolute value of the actual torque and the absolute value of the target torque is greater than a third set value, it is determined that the drive motor is in an out-of-control state; Among them, the first setting value is 200rpm / s; the second setting value is 50rpm / s; the third setting value is 6N.m; The motor power supply device includes an auxiliary energy system, a hydrogen fuel cell system, and a high-voltage power distribution system. The input end of the high-voltage power distribution system is electrically connected to the auxiliary energy system and the hydrogen fuel cell system, respectively, and the output end thereof is electrically connected to the drive motor controller; the drive motor controller is electrically connected to the drive motor, and the vehicle controller is electrically connected to the auxiliary energy system, the hydrogen fuel cell system, and the high-voltage power distribution system, respectively; Among them, the out-of-control processing process of the drive motor is as follows: when the drive motor is in an out-of-control state, the vehicle controller controls the output power of the hydrogen fuel cell system and the auxiliary energy system to 0 by sending instructions to the hydrogen fuel cell system and the auxiliary energy system; at the same time, the vehicle controller presets a delay time to delay cutting off the internal circuits of the high-voltage power distribution system, the hydrogen fuel cell system and the auxiliary energy system, so as to cut off the power supply of the drive motor and stop the drive motor from outputting torque to the outside.

2. A method for handling a runaway hydrogen fuel vehicle drive motor as claimed in claim 1, characterized in that: The value of M is 3~5.

3. A method for handling a runaway hydrogen fuel vehicle drive motor as claimed in claim 1, characterized in that: The preset delay time is 100ms to ensure that when the internal circuits of the high-voltage power distribution system, the hydrogen fuel cell system and the auxiliary energy system are cut off, the output power of the hydrogen fuel cell system and the auxiliary energy system has dropped to 0.

4. A runaway handling system for a hydrogen fuel vehicle drive motor, characterized in that: The out-of-control processing system applies the method according to any one of claims 1 to 3, and the out-of-control processing system comprises a vehicle controller (1), an auxiliary energy system (2), a hydrogen fuel cell system (3), a high-voltage power distribution system (4) and a motor drive system (5); the motor drive system (5) comprises a drive motor controller (51) and a drive motor (52), and the drive motor controller (51) is electrically connected to the drive motor (52); the input end of the high-voltage power distribution system (4) is electrically connected to the auxiliary energy system (2) and the hydrogen fuel cell system (3), respectively, and the output end thereof is electrically connected to the motor drive system (5); the high-voltage power distribution system (4) is provided with a first high-voltage contactor (6), and the first high-voltage contactor (6) is connected in series to an internal circuit of the high-voltage power distribution system (4); the hydrogen fuel cell system (3) is provided with a second high-voltage contactor (7), and the second high-voltage contactor (7) is connected in series to the internal circuit of the high-voltage power distribution system (4); The auxiliary energy system (2) is provided with a third high-voltage contactor (8), which is connected in series to the internal circuit of the auxiliary energy system (2); the vehicle controller (1) is respectively electrically connected to the first high-voltage contactor (6), the second high-voltage contactor (7), the third high-voltage contactor (8), the hydrogen fuel cell system (3), the auxiliary energy system (2), the high-voltage power distribution system (4) and the drive motor controller (51), and controls the opening or closing of the first high-voltage contactor (6), the second high-voltage contactor (7) and the third high-voltage contactor (8) to cut off or connect the internal circuits of the high-voltage power distribution system (4), the hydrogen fuel cell system (3) and the auxiliary energy system (2); the vehicle controller (1) is used to obtain the target torque of the drive motor (52), the speed of the drive motor and the actual torque of the drive motor (52).

5. A runaway handling system for a hydrogen fuel vehicle drive motor as claimed in claim 4, characterized in that: The vehicle controller (1) comprises a timing module (11); a delay time is preset through the timing module (11) to delay the disconnection of the internal circuits of the high-voltage power distribution system (4), the hydrogen fuel cell system (3) and the auxiliary energy system (2).

6. A runaway handling system for a hydrogen fuel vehicle drive motor as claimed in claim 4, characterized in that: The hydrogen fuel cell system (3), the auxiliary energy system (2), the high-voltage power distribution system (4) and the drive motor controller (51) are all electrically connected to the vehicle controller (1) via a CAN bus.

7. A runaway handling system for a hydrogen fuel vehicle drive motor as claimed in claim 4, characterized in that: The auxiliary energy system (2) comprises one or both of a supercapacitor system and a power battery system.

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