Power module fault diagnosis and processing method and system, vehicle and electronic equipment

Abstract

The invention relates to a power module fault diagnosis and processing method and system, a vehicle and electronic equipment. The power module fault diagnosis and processing method comprises the following steps: when a power module fault is monitored, identifying whether DCDC jumps within a preset time before the fault, if not, executing the following steps: performing reset judgment according to a fault type, reporting a fault recoverable flag bit if the condition is met, and reporting a fault unrecoverable flag bit if the condition is not met; executing resetting according to the reported flag bit and the working mode of the motor system; if yes, timing is started from the time when the fault is recognized, the DCDC output power when the DCDC jumps is recognized, the pull-down time is determined, the reset time and the response time are combined, the reset delay time is determined, and the reset operation is executed. The invention further provides a system of the power module fault diagnosis and processing method. The invention further provides electronic equipment and a vehicle. According to the invention, the power interruption risk of the electric vehicle caused by false alarm of the power module fault is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electric drive systems, and in particular to a method, system, vehicle and electronic equipment for diagnosing and processing power module faults. Background Art

[0002] With the rapid development of the automotive industry, new energy vehicles have become the real mainstream of the market. However, while new energy vehicles bring convenience and environmental protection, they also face many challenges. As the core component of new energy vehicles, the power module of the electric drive system plays a vital role, responsible for converting direct current into controllable alternating current to ensure the stable operation of the drive motor. However, when the power module in the motor controller fails, the operation of the vehicle will be seriously affected, manifested as power interruption or inability to start, which seriously affects the user's daily experience.

[0003] There are many reasons for power module failure, among which low power supply voltage is a common factor. In the power system of new energy vehicles, small batteries are important auxiliary power sources, and their power status is directly related to the normal operation of the power module. When the small battery is low in power, the power supply voltage will drop, which may cause power module failure. In this case, it is reasonable to report a power module failure.

[0004] However, low supply voltage is not the only reason for power module failure. In practical applications, we also need to consider the working status of the key component, the DCDC converter. As an important bridge connecting the high-voltage battery and the low-voltage battery, the performance of the DCDC converter directly affects the stability of the entire power system. If the DCDC converter fails or works abnormally (which may be caused by DCDC's own failure, AC charging mode switching, DC charging insulation detection or normal power-off, etc.), it may cause the small battery voltage to drop instantly, which in turn causes a false alarm of the power module. This false alarm phenomenon not only confuses and disturbs users, but also brings additional work burden to fault analysts. In addition, with the continuous increase in the number of new energy vehicles, the use environment and conditions of vehicles have become more complex and changeable, and the number of false fault alarms has also increased, which undoubtedly brings greater challenges to the stable operation of the DCDC converter. Therefore, accurately judging the failure problems of power modules and taking effective measures to solve and prevent them are the key to ensuring the sustainable and stable development of new energy vehicles.

[0005] CN117996688A discloses an active short circuit control method and device, which includes: determining an electrical signal detected by a fault module or motor controller of a vehicle; determining whether the condition for the motor controller to perform active short circuit control is met based on the electrical signal detected by the fault module or motor controller of the vehicle, and the active short circuit trigger threshold of the electrical signal or motor speed; performing active short circuit control when the condition for the motor controller to perform active short circuit control is met; determining whether the condition for exiting active short circuit control is met based on the fault module of the vehicle, the active short circuit exit threshold of the electrical signal or motor speed, and the current speed of the motor; exiting active short circuit control when the condition for the motor controller to exit active short circuit control is met. Although this method can effectively reduce the damage to controller components caused by power module failure, it cannot reduce the risk of power interruption. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a method, system, vehicle and electronic device for diagnosing and processing power module faults, so as to reduce the risk of power interruption of electric vehicles caused by false alarm of power module faults and improve the accuracy of power module fault diagnosis.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is as follows: The diagnosis and treatment method of power module failure includes the following steps: S1. When a power module fault is detected, identify whether the DCDC working mode changes within the first preset time before the fault. If no change occurs, execute S2. If a change occurs, execute S3. S2. Perform fault reset judgment according to the fault type. If the reset condition is met, the fault recoverable flag is reported. If the reset condition is not met, the fault unrecoverable flag is reported. Perform corresponding reset operation according to the reported flag and the working mode of the motor system. S3, start timing from the time when the power module fault is identified, and identify the DCDC output power P when the DCDC working mode changes a , determine the small battery voltage pull-down time t according to the DCDC output power a , and combined with the obtained power module reset time t b The response time t from the triggering to the recognition of the power module fault c , determine the reset delay time t of the power module fault i , when the timing time is greater than or equal to the reset delay time t i When the power module is reset,

[0008] According to the above technical means, firstly, by identifying whether the DCDC working mode jumps before the fault, the instantaneous fault caused by the switching of the DCDC working mode and the real power module fault are effectively distinguished, thereby greatly reducing the risk of electric vehicle power interruption caused by false alarm due to the instantaneous non-operation of the DCDC; secondly, by adopting a step-by-step, multi-condition fault diagnosis method, a comprehensive judgment is made in combination with factors such as the fault type, the DCDC working mode and the DCDC output power, thereby improving the accuracy and reliability of the power module fault diagnosis; thirdly, by determining the power module reset delay time based on the DCDC output power, the success rate of the power module reset is effectively improved, and the risk of hardware damage during the power module reset process is reduced; fourthly, according to the reported flag bit and the working mode of the motor system, the corresponding reset operation is performed, and the reset operation of the power module is performed after the reset delay time is determined, thereby realizing an intelligent and automated fault handling process and improving the processing efficiency and safety; finally, by reducing the power interruption caused by false alarms and accurately and timely fault handling, the reliability and stability of electric vehicles are improved, thereby improving the user experience and satisfaction.

[0009] The power module fault diagnosis and processing method of the present invention is applied to the electric drive system of the vehicle, which includes a motor, a motor controller and a reducer, wherein the motor controller includes a power module, and the function of the power module is to invert the DC power input from the power battery into AC power to control the operation of the motor. The function of DCDC is to convert the high-voltage DC power of the power battery into 12V to supply power to the small battery.

[0010] Preferably, in S2, a corresponding reset operation is performed according to the reported flag bit and the working mode of the motor system, specifically including: When the fault recoverable flag is received and the motor system is in non-fault mode, the application layer software sends a power module reset request, and the bottom layer software immediately performs the power module reset operation; When a fault unrecoverable flag is received and / or the motor system is in fault mode, the power module reset operation is not performed.

[0011] Preferably, when a fault unrecoverable flag is received and / or the motor system is in a fault mode, the power module reset operation is not performed, including the following three situations: 1) When the fault unrecoverable flag is received and the motor system is in fault mode, the power module reset operation is not performed; 2) When the fault recoverable flag is received and the motor system is in fault mode, the power module reset operation is not performed; 3) When the fault unrecoverable flag is received and the motor system is in non-fault mode, the power module reset operation is not performed.

[0012] Preferably, in S2, the bottom layer software performs a fault reset judgment according to the fault type, and if the reset condition is met, the fault is reported as a recoverable flag bit; if the reset condition is not met, the fault is reported as an unrecoverable flag bit; The fault types include: at least one of: GD3100 high-voltage side negative pressure fault, GD3100 high-voltage side VCC overvoltage, GD3100 overtemperature, IGBT VCR fault and GD3100 high-voltage side PWM output follower fault; The reset condition is that the fault type is not one or both of the IGBT VCR fault and the GD3100 high-voltage side PWM output following fault.

[0013] Preferably, in S3, the DCDC output power P a The time t when the small battery voltage is pulled down a The corresponding relationship is used to obtain the small battery voltage lowering time t a .

[0014] Preferably, in S3, the power module reset time t is obtained by checking the power module chip manual. b The response time t from the triggering to the recognition of the power module fault c .

[0015] Preferably, in S3, the reset delay time t of the power module failure is i =t a -t b -t c .

[0016] Among them, the DCDC output power P a The time t when the small battery voltage is pulled down a The corresponding relationship is expressed in t a The power module fault will continue to be triggered within t, which should be directly used as the reset delay time in theory. b It takes a certain amount of time from the power module fault triggering to the application layer recognition. c Therefore, the reset delay time t i Correction is made, and the reset delay time of the corrected power module fault is t i =t a -t b -t c .

[0017] Preferably, the DCDC output power P a The time t when the small battery voltage is pulled down a The corresponding relationship is obtained through bench test.

[0018] Preferably, the bench test method comprises the following steps: a. Based on the DCDC non-working bench simulation test, control the DCDC to be in working mode, adjust the low-voltage load power to P1, and turn off the DCDC output after stable operation for the second preset time. The small battery voltage is instantly pulled down to the power module fault trigger threshold V when the DCDC is not working. d and below until it recovers to V d The above pull-down time t1; b. Adjust the low voltage load power to P n , execute step a to obtain the corresponding low voltage load power pull-down time t n , where n≥2; c. Through data fitting, we can get the curve of pull-down time versus low-voltage load power, that is, DCDC output power P a The time t when the small battery voltage is pulled down a The corresponding relationship.

[0019] The present invention also provides a system for implementing the method for diagnosing and processing a power module fault according to the present invention, comprising: Fault monitoring module, used to monitor the working status of DCDC and trigger subsequent processing when a power module fault is detected; Working mode jump identification module: used to identify whether the DCDC working mode jumps within the first preset time before the fault when the power module fault is detected. If no jump occurs, the first processing path is triggered; if a jump occurs, the second processing path is triggered; The first processing path includes: The fault reset judgment module is used to perform fault reset judgment according to the fault type. If the reset condition is met, the fault is reported as a recoverable flag bit, otherwise the fault is reported as an unrecoverable flag bit; A reset operation execution module, used to execute a corresponding reset operation according to the reported flag bit and the working mode of the motor system; The second processing path includes: The timing and power detection module starts timing when a power module fault is identified, and identifies the DCDC output power when a DCDC working mode changes; The time calculation module is used to calculate the DCDC output power P a Determine the small battery voltage drop time t a , and combined with the obtained power module reset time t b The response time t from the triggering to the recognition of the power module fault c , determine the reset delay time t of the power module fault i ; Delay reset module, used to reset when the timing time is greater than or equal to the reset delay time t iWhen the power module is reset,

[0020] Preferably, the time calculation module includes: Storage submodule, used to store DCDC output power P a The time t when the small battery voltage is pulled down a The corresponding relationship and power module chip manual; The time calculation submodule is used to calculate the DCDC output power P a The time t when the small battery voltage is pulled down a The corresponding relationship is used to obtain the small battery voltage lowering time t a , and combined with the obtained power module reset time t b The response time t from the power module fault being triggered to being recognized by the application layer software c , calculate and determine the reset delay time t of the power module fault i ; where t i =t a -t b -t c .

[0021] The present invention also provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the power module fault diagnosis and processing method described in the present invention when executing the computer program.

[0022] The present invention further provides a vehicle, wherein the vehicle comprises the electronic device described in the present invention.

[0023] Beneficial effects of the present invention: The power module fault diagnosis and processing method of the present invention, firstly, by identifying whether the DCDC working mode jumps before the fault, the instantaneous fault caused by the working mode switching and the real power module fault are effectively distinguished, thereby greatly reducing the risk of electric vehicle power interruption caused by false alarm due to the instantaneous non-operation of the DCDC; wherein, by adopting a step-by-step, multi-condition fault diagnosis method, a comprehensive judgment is made in combination with factors such as the fault type, the DCDC working mode and the DCDC output power, thereby improving the accuracy and reliability of the power module fault diagnosis; thirdly, by determining the power module reset delay time based on the DCDC output power, the success rate of the power module reset is effectively improved, and the risk of hardware damage during the power module reset process is reduced; fourthly, according to the reported flag bit and the working mode of the motor system, the corresponding reset operation is performed, and the reset operation of the power module is performed after the reset delay time is determined, thereby realizing an intelligent and automated fault processing process, and improving the processing efficiency and safety; finally, by reducing the power interruption caused by false alarms and accurately and timely fault processing, the reliability and stability of the electric vehicle are improved, thereby improving the user experience and satisfaction, and in the field of electric drive system technology, it has the value of popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A flow chart of a method for diagnosing and processing a power module fault of the present invention; Figure 2 This is a schematic diagram of the structure in which the voltage of a small battery is instantly lowered; Figure 3 It is a curve graph showing the pull-down time versus low voltage load power; Figure 4 The figure is a schematic diagram of the structure of a system for implementing the method for diagnosing and processing power module faults of the present invention. DETAILED DESCRIPTION

[0025] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. 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 embodiments, 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 understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0026] 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 arbitrarily, and the component layout may also be more complicated.

[0027] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present application. However, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details.

[0028] The present invention intends to disclose a method, system, vehicle and electronic device for diagnosing and processing power module faults, so as to reduce the risk of power interruption of electric vehicles caused by false alarm of power module faults and improve the accuracy of power module fault diagnosis.

[0029] Among them, Figures 1 to 3 As shown, the method for diagnosing and handling power module failure includes the following steps: S1, real-time monitoring of the working status of DCDC. When the driver chip detects a power module fault, it identifies whether the DCDC working mode changes within the first preset time before the fault. If no change occurs, S2 is executed. If a change occurs, S3 is executed. S2. The bottom layer software performs fault reset judgment according to the fault type. If the reset condition is met, the fault recoverable flag bit (i.e., 1) is reported. If the reset condition is not met, the fault unrecoverable flag bit (i.e., 0) is reported. The application layer software performs the corresponding reset operation according to the reported flag bit and the working mode of the motor system. S3, start timing from when the application layer software recognizes the power module failure, and identify the DCDC output power P when the DCDC working mode changes a , according to the DCDC output power P a Determine the small battery voltage drop time t a , and combined with the obtained power module reset time t b The response time t from the power module fault being triggered to being recognized by the application layer software c , determine the reset delay time t of the power module fault i , when the timing time is greater than or equal to the reset delay time t i When the power module is reset,

[0030] The above-mentioned diagnosis and processing method is designed to target the phenomenon that the voltage of the small battery is pulled down when the DCDC stops working, resulting in a false alarm of a power module fault, so as to improve the accuracy of power module fault diagnosis and reduce the risk of vehicle power interruption.

[0031] The above-mentioned power module fault diagnosis and treatment method is applied to the vehicle's electric drive system, which includes a motor, a motor controller and a reducer, wherein the motor controller includes a power module, and the function of the power module is to invert the DC power input from the power battery into AC power to control the operation of the motor. The function of DCDC is to convert the high-voltage DC power of the power battery into 12V to power the small battery.

[0032] Whether a jump occurs in the DCDC working mode includes normal switching or instantaneous jump of the DCDC working mode.

[0033] In some embodiments, in S2, a corresponding reset operation is performed according to the reported flag bit and the working mode of the motor system, specifically including: When the fault recoverable flag (i.e. 1) is received and the motor system is in non-fault mode, the application layer software sends a power module reset request, and the bottom layer software immediately performs the power module reset operation; When a fault unrecoverable flag bit (ie, 0) is received and / or the motor system is in a fault mode, the power module reset operation is not performed.

[0034] Exemplarily, when a fault unrecoverable flag bit (ie, 0) is received and / or the motor system is in a fault mode, the power module reset operation is not performed, including the following three situations: 1) When the fault unrecoverable flag bit (i.e. 0) is received and the motor system is in fault mode, the power module reset operation is not performed; 2) When the fault recoverable flag (i.e. 1) is received and the motor system is in fault mode, the power module reset operation is not performed; 3) When the fault unrecoverable flag (i.e. 0) is received and the motor system is in non-fault mode, the power module reset operation is not performed.

[0035] In some embodiments, in S2, the bottom layer software performs a fault reset judgment according to the fault type. If the reset condition is met, a fault recoverable flag bit (i.e., 1) is reported; if the reset condition is not met, a fault unrecoverable flag bit (i.e., 0) is reported. Among them, the fault types include: at least one of the following: negative pressure fault on the high-voltage side of GD3100, VCC overvoltage on the high-voltage side of GD3100, overtemperature of GD3100, IGBT VCR fault, and PWM output follower fault on the high-voltage side of GD3100; The reset condition is met when the fault type is not one or both of the IGBT VCR fault and the GD3100 high-voltage side PWM output following fault.

[0036] In some embodiments, in S3, the DCDC output power P a The time t when the small battery voltage is pulled downa The corresponding relationship is used to obtain the voltage drop time t of the small battery that does not work in this DCDC. a .

[0037] The corresponding relationship between the DCDC output power Pa and the small battery voltage lowering time ta is a corresponding relationship table between the DCDC output power Pa and the small battery voltage lowering time ta.

[0038] In some embodiments, in S3, the power module reset time t is obtained by checking the power module chip manual. b The response time t from the triggering to the recognition of the power module fault c .

[0039] In some embodiments, in S3, the reset delay time t of the power module fault is i =t a -t b -t c .

[0040] Among them, the DCDC output power P a The time t when the small battery voltage is pulled down a The corresponding relationship is expressed in t a The power module fault will continue to be triggered within t, which should be directly used as the reset delay time in theory. b It takes a certain amount of time from the power module fault triggering to the application layer recognition. c Therefore, the reset delay time t i Correction is made, and the reset delay time of the corrected power module fault is t i =t a -t b -t c .

[0041] In some embodiments, the DCDC output power P a The time t when the small battery voltage is pulled down a The corresponding relationship between the DCDC output power Pa and the small battery voltage reduction time ta is obtained through bench test.

[0042] In some embodiments, the method of bench test testing comprises the following steps: a. Based on the DCDC non-working bench simulation test, control the DCDC to be in working mode, adjust the low-voltage load power to P1, and turn off the DCDC output after stable operation for the second preset time. The small battery voltage is instantly pulled down to the power module fault trigger threshold V when the DCDC is not working. d and below until it recovers to V d The above pull-down time t1; b. Adjust the low voltage load power to P n , execute step a, and get the pull-down time t n With low voltage load power P n The curve of change, where n ≥ 2, P1 and P n Not equal; c) Through polynomial data fitting, the regular curve of low-voltage load power versus pull-down time is obtained, that is, the corresponding relationship between DCDC output power Pa and small battery voltage pull-down time ta.

[0043] Exemplarily, a method for diagnosing and processing a power module fault includes the following steps: S10, real-time monitoring of the working state of the DCDC, when the application layer software detects a power module fault, identifies that the working mode of the DCDC in the first preset time before the fault is switched from high voltage activation to standby mode, then execute S30; S30, start timing from when the application layer software recognizes a power module failure, and identify the DCDC output power P when the DCDC working mode changes a , according to the DCDC output power P a Query DCDC output power P a The time t when the small battery voltage is pulled down a The corresponding relationship table shows the time t when the small battery voltage is pulled down. a , and combined with the obtained power module reset time t b The response time t from the power module fault being triggered to being recognized by the application layer software c , determine the reset delay time t of the power module fault i , t i =t a -t b -t c , when the timing time is greater than or equal to the reset delay time t i When the power module is reset,

[0044] like Figure 4 As shown, a system for implementing the method for diagnosing and processing a power module fault in any of the above embodiments includes: Fault monitoring module, used to monitor the working status of DCDC and trigger subsequent processing when a power module fault is detected; Working mode jump identification module: used to identify whether the DCDC working mode jumps within the first preset time before the fault when the power module fault is detected. If no jump occurs, the first processing path is triggered; if a jump occurs, the second processing path is triggered; The first processing path includes: The fault reset judgment module is used to perform fault reset judgment according to the fault type. If the reset condition is met, the fault recovery flag bit (i.e. 1) is reported, otherwise the fault non-recoverable flag bit (i.e. 0) is reported; A reset operation execution module, used to execute a corresponding reset operation according to the reported flag bit and the working mode of the motor system; The second processing path includes: The timing and power detection module starts timing when the application layer software identifies a power module failure, and identifies the DCDC output power when the DCDC working mode changes; The time calculation module is used to calculate the DCDC output power P a Determine the small battery voltage drop time t a , and combined with the obtained power module reset time t b The response time t from the power module fault being triggered to being recognized by the application layer software c , determine the reset delay time t of the power module fault i ; Delay reset module, used to reset when the timing time is greater than or equal to the reset delay time t i When the power module is reset,

[0045] In some embodiments, the time calculation module includes: Storage submodule, used to store DCDC output power P a The time t when the small battery voltage is pulled down a The corresponding relationship and power module chip manual; The time calculation submodule is used to check the DCDC output power P a The time t when the small battery voltage is pulled down a The corresponding relationship is used to obtain the small battery voltage lowering time t a , and combined with the obtained power module reset time t b The response time t from the power module fault being triggered to being recognized by the application layer software c , calculate and determine the reset delay time t of the power module fault i ; where t i =t a -t b -t c .

[0046] An electronic device includes a memory and a processor. The memory stores a computer program. When the processor executes the computer program, the steps of the power module fault diagnosis and processing method in any of the above embodiments are implemented.

[0047] A vehicle comprises the electronic device in any one of the above embodiments.

[0048] In summary, the power module fault diagnosis and processing method of the present invention, firstly, by identifying whether the DCDC working mode jumps before the fault, the instantaneous fault caused by the working mode switching and the real power module fault are effectively distinguished, thereby greatly reducing the risk of electric vehicle power interruption caused by false alarm due to the instantaneous non-operation of DCDC; secondly, by adopting a step-by-step, multi-condition fault diagnosis method, a comprehensive judgment is made in combination with factors such as the fault type, the DCDC working mode and the DCDC output power, thereby improving the accuracy and reliability of power module fault diagnosis; thirdly, by determining the power module reset delay time based on the DCDC output power, the success rate of power module reset is effectively improved, and the risk of hardware damage during the power module reset process is reduced; fourthly, according to the reported flag bit and the working mode of the motor system, the corresponding reset operation is performed, and the reset operation of the power module is performed after the reset delay time is determined, thereby realizing an intelligent and automated fault handling process, and improving processing efficiency and safety; finally, by reducing power interruption caused by false alarms and accurate and timely fault handling, the reliability and stability of electric vehicles are improved, thereby improving the user experience and satisfaction, and in the field of electric drive system technology, it has promotion and application value.

[0049] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A method for diagnosing and treating power module failure, characterized in that: The following steps are involved: S1. When a power module fault is detected, identify whether the DCDC working mode changes within the first preset time before the fault. If no change occurs, execute S2. If a change occurs, execute S3. S2. Perform fault reset judgment according to the fault type. If the reset condition is met, the fault is reported as a recoverable flag. If the reset condition is not met, the fault is reported as an unrecoverable flag. Execute corresponding reset operation according to the reported flag bit and the working mode of the motor system; S3, start timing from the time when the power module fault is identified, and identify the DCDC output power P when the DCDC working mode changes a , determine the small battery voltage pull-down time t according to the DCDC output power a , and combined with the obtained power module reset time t b The response time t from the triggering to the recognition of the power module fault c , determine the reset delay time t of the power module fault i , when the timing time is greater than or equal to the reset delay time t i When the power module is reset, 2. The method for diagnosing and processing power module failure according to claim 1, characterized in that: In S2, a corresponding reset operation is performed according to the reported flag bit and the working mode of the motor system, specifically including: When the fault recoverable flag is received and the motor system is in non-fault mode, the application layer software sends a power module reset request, and the bottom layer software immediately performs the power module reset operation; When a fault unrecoverable flag is received and / or the motor system is in fault mode, the power module reset operation is not performed.

3. The method for diagnosing and processing power module failure according to claim 1, characterized in that: In S2, the bottom layer software performs a fault reset judgment according to the fault type. If the reset condition is met, the fault is reported as a recoverable flag bit. If the reset condition is not met, the fault is reported as an unrecoverable flag bit. The fault types include: at least one of: GD3100 high-voltage side negative pressure fault, GD3100 high-voltage side VCC overvoltage, GD3100 overtemperature, IGBTVCR fault and GD3100 high-voltage side PWM output follower fault; The reset condition is that the fault type is not one or both of the IGBT VCR fault and the GD3100 high-voltage side PWM output following fault.

4. The method for diagnosing and processing power module failure according to claim 1, characterized in that: In S3, the DCDC output power P a The time t when the small battery voltage is pulled down a The corresponding relationship is used to obtain the small battery voltage lowering time t a ; And / or, in S3, the power module reset time t is obtained by checking the power module chip manual. b The response time t from the triggering to the recognition of the power module fault c ; And / or, in S3, the reset delay time t of the power module failure i =t a -t b -t c .

5. The method for diagnosing and processing power module failure according to claim 4, characterized in that: The DCDC output power P a The time t when the small battery voltage is pulled down a The corresponding relationship is obtained through bench test.

6. The method for diagnosing and processing power module failure according to claim 5, characterized in that: The bench test method comprises the following steps: a. Based on the DCDC non-working bench simulation test, control the DCDC to be in working mode, adjust the low-voltage load power to P1, and turn off the DCDC output after stable operation for the second preset time. The small battery voltage is instantly pulled down to the power module fault trigger threshold V when the DCDC is not working. d and below until it recovers to V d The above pull-down time t1; b. Adjust the low voltage load power to P n , execute step a to obtain the corresponding low voltage load power pull-down time t n , where n≥2; c. Through data fitting, we can obtain the curve of pull-down time versus low-voltage load power, i.e. DCDC output power P a The time t when the small battery voltage is pulled down a The corresponding relationship.

7. A system for implementing the method for diagnosing and processing a power module fault according to any one of claims 1 to 6, characterized in that: include: Fault monitoring module, used to monitor the working status of DCDC and trigger subsequent processing when a power module fault is detected; Working mode jump identification module: used to identify whether the DCDC working mode jumps within the first preset time before the fault when the power module fault is detected. If no jump occurs, the first processing path is triggered; if a jump occurs, the second processing path is triggered; The first processing path includes: The fault reset judgment module is used to perform fault reset judgment according to the fault type. If the reset condition is met, the fault is reported as a recoverable flag bit, otherwise the fault is reported as an unrecoverable flag bit; A reset operation execution module, used to execute a corresponding reset operation according to the reported flag bit and the working mode of the motor system; The second processing path includes: The timing and power detection module starts timing when a power module fault is identified, and identifies the DCDC output power when a DCDC working mode changes; The time calculation module is used to calculate the DCDC output power P a Determine the small battery voltage drop time t a , and combined with the obtained power module reset time t b The response time t from the triggering to the recognition of the power module fault c , determine the reset delay time t of the power module fault i ; Delay reset module, used to reset when the timing time is greater than or equal to the reset delay time t i When the power module is reset, 8. The system according to claim 7, characterized in that The time calculation module includes: Storage submodule, used to store DCDC output power P a The time t when the small battery voltage is pulled down a The corresponding relationship and power module chip manual; The time calculation submodule is used to calculate the DCDC output power P a The time t when the small battery voltage is pulled down a The corresponding relationship is used to obtain the small battery voltage lowering time t a , and combined with the obtained power module reset time t b The response time t from the power module fault being triggered to being recognized by the application layer software c , calculate and determine the reset delay time t of the power module fault i ; where t i =t a -t b -t c .

9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method for diagnosing and processing a power module fault according to any one of claims 1 to 6 are implemented.

10. A vehicle, characterized in that: The vehicle includes the electronic device according to claim 9.

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