A method for handling bus voltage faults and related equipment

Abstract

This application provides a bus voltage fault handling method and related equipment, applied to an electric drive system. First, the electric drive system undergoes bus voltage fault detection to obtain the fault detection result. If the bus voltage fault detection result indicates a fault, the fault type is determined. Based on the fault type, it is determined whether the motor's operating mode in the electric drive system is a preset operating mode corresponding to the fault type. If the motor's operating mode is the preset operating mode corresponding to the fault type, the available torque of the motor is adjusted in real time according to the bus voltage to maintain the normal operation of the electric drive system. Through this method, when a bus voltage fault occurs in the electric drive system, different bus voltage fault types can be addressed, maintaining the normal operation of the electric drive system while protecting the high-voltage system, thereby improving the driver's driving experience.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicles, in particular to a bus voltage fault processing method and related equipment. BACKGROUND

[0002] With the wide popularity of global low-carbon development goals, new energy vehicle technology has developed rapidly. In the current new energy hybrid vehicle or pure electric vehicle, a high-voltage system is correspondingly provided. In actual application scenarios, in order to ensure the safety of the high-voltage system, the existing technology usually detects the fault of the bus voltage to realize the protection of the high-voltage system. In the most commonly used protection method for the high-voltage system, the work of the entire electric drive system is automatically interrupted when the bus voltage fault is detected to realize the protection of the high-voltage system. Although this method can effectively protect the high-voltage system of the vehicle, the sudden interruption of the electric drive system will bring poor driving experience to the user because the work of the electric drive system is immediately stopped when the bus voltage fault is detected. The user has poor driving experience.

[0003] Therefore, how to solve the problem that the existing technology directly causes the electric drive system to be powered off when the bus voltage fault of the electric drive system occurs, which affects the user's driving experience, has become a technical problem that technicians in the field urgently need to solve. SUMMARY

[0004] Based on the above problems, in order to solve the problem that the existing technology can only deal with the bus voltage fault by powering off the electric drive system when the bus voltage fault of the electric drive system occurs, thereby affecting the user's experience, the present application provides a bus voltage fault processing method and related equipment.

[0005] The embodiments of the present application disclose the following technical solutions:

[0006] In a first aspect, the present application discloses a bus voltage fault processing method applied to an electric drive system, comprising:

[0007] detecting the bus voltage fault of the electric drive system to obtain a bus voltage fault detection result;

[0008] if the bus fault detection result is a fault, determining the fault type of the bus voltage;

[0009] determining whether the working mode of the motor in the electric drive system is a preset working mode corresponding to the fault type according to the fault type of the bus voltage;

[0010] If the working mode of the motor is a preset working mode corresponding to the fault type, the available torque of the motor is adjusted in real time according to the bus voltage to maintain normal operation of the electric drive system.

[0011] Optionally, the bus voltage fault detection on the electric drive system includes:

[0012] The bus voltage value of the electric drive system is obtained.

[0013] If the bus voltage value is in a preset fault value interval, the bus voltage fault detection result is determined as a fault.

[0014] Optionally, the preset fault value interval includes at least a first preset fault value interval and a second preset fault value interval, the minimum value in the first preset fault value interval is greater than the maximum value in the second preset fault value interval; the fault type of the bus voltage includes at least overvoltage fault and undervoltage fault; the determination of the fault type of the bus voltage includes:

[0015] When the bus voltage value is in the first preset fault value interval, the fault type of the bus voltage is determined as overvoltage fault.

[0016] When the bus voltage value is in the second preset fault value interval, the fault type of the bus voltage is determined as undervoltage fault.

[0017] Optionally, the preset working mode includes at least power generation mode and electric mode; the determination of whether the working mode of the motor in the electric drive system is a preset working mode corresponding to the fault type according to the fault type of the bus voltage includes:

[0018] When the fault type of the bus voltage is overvoltage fault, it is determined whether the working mode of the motor in the electric drive system is power generation mode.

[0019] When the fault type of the bus voltage is overvoltage fault, it is determined whether the working mode of the motor in the electric drive system is electric mode.

[0020] Optionally, after the determination of whether the working mode of the motor in the electric drive system is a preset working mode corresponding to the fault type according to the fault type of the bus voltage, the method further includes:

[0021] If the working mode of the motor is not a preset working mode corresponding to the fault type, the available torque of the motor is controlled to continue running at the current torque.

[0022] Optionally, the real-time adjustment of the available torque of the motor according to the bus voltage specifically comprises:

[0023] According to the bus voltage value, the available torque of the motor is linearly reduced.

[0024] In a second aspect, the application discloses a bus voltage fault processing device applied to an electric drive system, comprising:

[0025] A fault detection module is configured to detect a bus voltage fault of the electric drive system to obtain a bus voltage fault detection result.

[0026] A fault type determination module is configured to determine a fault type of the bus voltage when the bus fault detection result is fault.

[0027] A working mode determination module is configured to determine whether a working mode of a motor in the electric drive system is a preset working mode corresponding to the fault type according to the fault type of the bus voltage.

[0028] A torque adjustment module is configured to, when the working mode of the motor is the preset working mode corresponding to the fault type, adjust the available torque of the motor in real time according to the bus voltage to maintain normal operation of the electric drive system.

[0029] Optionally, the fault detection module is specifically configured to:

[0030] Obtain a bus voltage value of the electric drive system.

[0031] If the bus voltage value is in a preset fault value interval, it is determined that the bus voltage fault detection result is fault.

[0032] In a third aspect, the application discloses an electronic device, characterized by comprising:

[0033] A memory is configured to store a computer program.

[0034] A processor is configured to implement the steps of the bus voltage fault processing method when executing the computer program.

[0035] In a fourth aspect, the application discloses a vehicle, characterized by comprising the electronic device.

[0036] Compared with the prior art, the application has the following beneficial effects: the application provides a bus voltage fault processing method and related equipment applied in an electric drive system. First, the bus voltage fault of the electric drive system is detected to obtain a bus voltage fault detection result. If the bus fault detection result is a fault, the fault type of the bus voltage is determined, and whether the working mode of the motor in the electric drive system is a preset working mode corresponding to the fault type is determined according to the fault type of the bus voltage. If the working mode of the motor is the preset working mode corresponding to the fault type, the available torque of the motor is adjusted in real time according to the bus voltage to maintain the normal operation of the electric drive system. Through the above method, when the bus voltage fault of the electric drive system occurs, the bus voltage fault can be coped with according to different bus voltage fault types, the normal operation of the electric drive system is maintained under the premise of protecting the high-voltage system, and the driving experience of the driver is improved. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0038] Figure 1 A flowchart of a bus voltage fault processing method provided by an embodiment of the present application;

[0039] Figure 2 A structure diagram of a bus voltage fault processing device provided by an embodiment of the present application;

[0040] Figure 3 A structure diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0041] As described above, in the current new energy hybrid vehicle or pure electric vehicle, a high-voltage system is correspondingly provided. In actual application scenarios, in order to ensure the safety of the high-voltage system, the prior art usually realizes the protection of the high-voltage system by detecting the bus voltage fault. In the most commonly used protection method for the high-voltage system, when the bus voltage fault is detected, the work of the entire electric drive system is automatically interrupted to realize the protection of the high-voltage system. Although this method can effectively protect the high-voltage system of the vehicle, the sudden interruption of the electric drive system will bring poor driving experience to the user because the work of the electric drive system is immediately stopped when the bus voltage fault is detected. The user has poor driving experience.

[0042] The inventors provide a bus voltage fault processing method and related equipment applied to an electric drive system. When detecting that the electric drive system has a bus voltage fault, the type of the bus voltage fault is determined, and whether the working mode of a motor in the electric drive system is a preset working mode corresponding to the type of the bus voltage fault is judged according to the type of the bus voltage fault. If the working mode of the motor is the preset working mode corresponding to the type of the bus voltage fault, the available torque of the motor is adjusted in real time according to the bus voltage to maintain normal operation of the electric drive system. Through the above method, when the electric drive system has a bus voltage fault, the bus voltage fault can be coped with according to different types of bus voltage faults, the normal operation of the electric drive system is maintained under the premise of protecting the high-voltage system, and the driving experience of the driver is improved.

[0043] In order for those skilled in the art to better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0044] Method embodiments

[0045] The present embodiment mainly introduces a processing method for the bus voltage fault in the electric drive system. In actual application scenarios, the types of bus voltage faults include overvoltage fault and undervoltage fault. For the overvoltage fault of the bus voltage, it can be further divided into software overvoltage fault and hardware overvoltage fault, wherein the threshold of the software overvoltage fault is smaller than that of the hardware overvoltage fault. The processing method for the overvoltage fault of the bus voltage introduced in the following embodiment is mainly for the processing method of the software overvoltage fault.

[0046] Referring to Figure 1 The figure is a flowchart of a bus voltage fault processing method provided by the present embodiment, which specifically includes the following steps:

[0047] S101: Perform bus voltage fault detection on the electric drive system to obtain a bus voltage fault detection result.

[0048] The present embodiment takes the electric drive system in a new energy hybrid vehicle as a specific embodiment, which includes related components such as a high-voltage battery, a low-voltage power supply system, a motor, and a motor controller.

[0049] Firstly, the bus voltage value can be obtained by invoking the hardware voltage sampling circuit through the motor controller in the electric drive system, so as to perform fault detection on the bus voltage to obtain a bus fault detection result.

[0050] Specifically, in the step of detecting the fault of the bus voltage, the fault detection on the bus voltage can be completed through the following two steps, specifically including:

[0051] Step one, obtaining the bus voltage value.

[0052] Step two, if the bus voltage value is in a preset fault value interval, determining that the bus voltage fault detection result is fault.

[0053] In the above two steps, after obtaining the bus voltage value, whether the electric drive system has a bus voltage fault is determined according to the relationship between the bus voltage value and the preset fault value interval. Specifically, if the bus voltage value is in the preset fault value interval, it is determined that the electric drive system has a bus voltage fault. The preset fault value interval can be multiple preset fault value intervals, and different preset fault value intervals can represent different fault types of the bus voltage. The specific number and interval size of the preset fault value interval are not limited in the embodiment.

[0054] S102: If the bus fault detection result is fault, determining the fault type of the bus voltage.

[0055] After completing the fault detection on the bus voltage and obtaining the bus voltage fault detection result, further operation is performed according to the obtained bus fault detection result. When the bus fault detection result is determined as fault, the fault type of the bus voltage is further determined. Specifically, the fault type of the bus voltage can be determined according to the specific preset fault value interval in which the bus voltage value is located. In the embodiment, the fault type of the bus voltage at least includes overvoltage fault and undervoltage fault.

[0056] Specifically, in the process of determining the fault type of the bus voltage, the fault type of the bus voltage can be determined through the following two steps, specifically including:

[0057] Step one, when the bus voltage value is in a first preset fault value interval, determining that the fault type of the bus voltage is overvoltage fault;

[0058] Step two, when the bus voltage value is in a second preset fault value interval, determining that the fault type of the bus voltage is undervoltage fault.

[0059] The preset fault value interval includes at least a first preset fault value interval and a second preset fault value interval, wherein the minimum value in the first preset fault value interval is greater than the maximum value in the second preset fault value interval, and the fault type of the bus voltage can be determined according to the preset fault value interval in which the bus voltage value is located.

[0060] Specifically, when the bus voltage value is in the first preset fault value interval, it is determined that the fault type of the bus voltage is overvoltage fault; and when the bus voltage value is in the second preset fault value interval, it is determined that the fault type of the bus voltage is under-voltage fault. In this step, by dividing different preset fault value intervals, the different fault types of the bus voltage are determined, so that when the bus voltage fault occurs in the electric drive system, the specific bus voltage fault type can be determined according to the specific bus voltage value, so that different measures can be taken according to different bus voltage fault types in the subsequent process, and the processing efficiency of the bus voltage fault processing is improved.

[0061] S103: According to the fault type of the bus voltage, it is determined whether the working mode of the motor in the electric drive system is a preset working mode corresponding to the fault type.

[0062] After determining the fault type of the bus voltage, it is determined whether the working mode of the motor in the electric drive system is a working mode corresponding to the fault type according to the determined fault type of the bus voltage.

[0063] In this application, different preset working modes corresponding to different fault types of the bus voltage are provided, and when the bus voltage fault of the electric drive system is detected and the fault type of the bus voltage is obtained, it is determined whether the working mode of the motor in the electric drive system is a preset working mode corresponding to the fault type, so that the available torque of the motor can be adjusted in real time in combination with the actual working mode of the motor and the bus voltage in the subsequent process.

[0064] Specifically, in the process of determining whether the working mode of the motor in the electric drive system is a preset working mode corresponding to the fault type, the following two steps can be implemented, including:

[0065] Step 1: When the fault type of the bus voltage is overvoltage fault, it is determined whether the working mode of the motor in the electric drive system is generation mode.

[0066] Step 2: When the fault type of the bus voltage is overvoltage fault, it is determined whether the working mode of the motor in the electric drive system is motor mode.

[0067] Specifically, in the embodiment, different preset working modes corresponding to different bus voltage fault types are provided, for example, when the bus voltage fault type is overvoltage fault, it is determined whether the working mode of the motor is the generating mode. When the bus voltage fault type is under-voltage fault, it is determined whether the working mode of the motor is the motor mode. Because the motor may have different working modes under different bus voltage fault types, by dividing the bus voltage fault types and the working modes of the motor, different responses can be taken for different bus voltage fault types.

[0068] S104: If the working mode of the motor is the preset working mode corresponding to the fault type, the available torque of the motor is adjusted in real time according to the bus voltage to maintain the normal operation of the electric drive system. In the process of confirming whether the corresponding relationship between the bus voltage fault type and the working mode of the motor is correct, if the working mode of the motor is the preset working mode corresponding to the bus voltage fault type, the available torque of the motor is adjusted in real time according to the bus voltage to maintain the normal operation of the electric drive system.

[0069] In the embodiment, because the bus voltage presents different change states under different working modes of the motor, for example, when the working mode of the motor is the generating mode, the bus voltage presents a gradually increasing trend, and when the working mode of the motor is the motor mode, the bus voltage presents a gradually decreasing trend. Therefore, in the process of adjusting the available torque of the motor in real time according to the bus voltage, because the bus voltage presents a gradually increasing or decreasing trend, by linearly reducing the available torque of the motor, the available torque of the motor can be adjusted according to the real-time change of the bus voltage, and when the bus voltage gradually increases or decreases, the available torque of the motor is reduced, thereby maintaining the normal operation of the motor system.

[0070] For example, when over-voltage fault of the bus voltage is detected and the working mode of the motor is the generating mode, in order to protect the high-voltage battery in the electric drive system and prevent battery overcharging, the available torque of the motor needs to be linearly reduced according to the actual situation of the bus voltage. For example, when under-voltage fault of the bus voltage is detected and the working mode of the motor is the motor mode, in order to prevent the high-voltage battery from being over-discharged

[0071] In the process of actually adjusting the available torque of the motor, for different working modes of the motor, a preset bus voltage threshold corresponding to the working mode of the motor can be set, and when the bus voltage reaches the preset bus voltage threshold, the available torque of the motor is reduced to 0, thereby maintaining the normal operation of the electric drive system. For example, when an overvoltage fault of the bus voltage is detected, when the working mode of the motor is the power generation mode, in the process of linearly reducing the available torque of the motor, since the working mode of the motor is the power generation mode, the bus voltage will continue to rise, and when the bus voltage reaches the preset bus voltage threshold, the available torque of the motor is reduced to 0, thereby further maintaining the normal operation of the electric drive system.

[0072] As an optional implementation, after step S103, further comprising:

[0073] If the working mode of the motor is not the preset working mode corresponding to the fault type, the available torque of the motor is controlled to continue operating at the current torque.

[0074] In the process of determining whether the fault type of the bus voltage and the working mode of the motor are correct, if the working mode of the current motor is not the preset working mode corresponding to the fault type of the bus voltage, the available torque of the motor is controlled to continue operating at the current torque, that is, the available torque of the motor is not changed, and the motor only needs to continue operating at the current torque to maintain the normal operation of the electric drive system.

[0075] In actual application scenarios, the present application has different working modes of the motor corresponding to different fault types of the bus voltage. For example, when the electric drive system has an overvoltage fault of the bus voltage, it is first determined whether the working mode of the motor is the power generation mode at this time, because when the motor is in the power generation mode, the voltage value of the bus voltage will continue to rise, and in this scenario, the high-voltage battery of the electric drive system has the risk of overcharging. Therefore, in order to prevent the overcharging of the high-voltage battery, the available torque of the motor is linearly reduced, thereby maintaining the normal operation of the electric drive system. If the working mode of the motor is not the preset power generation mode at this time, it indicates that the voltage value of the bus voltage will not continue to rise, and the risk of overcharging of the high-voltage battery is low at this time, and the available torque of the motor is maintained to continue operating at the current torque, thereby maintaining the normal operation of the electric drive system.

[0076] The embodiment provides a bus voltage fault processing method and related equipment, which are applied to an electric drive system. First, bus voltage fault detection is performed on the electric drive system to obtain a bus voltage fault detection result. If the bus fault detection result is a fault, the fault type of the bus voltage is determined. According to the fault type of the bus voltage, it is determined whether the working mode of a motor in the electric drive system is a preset working mode corresponding to the fault type. If the working mode of the motor is the preset working mode corresponding to the fault type, the available torque of the motor is adjusted in real time according to the bus voltage to maintain normal operation of the electric drive system. Through the above method, when the bus voltage of the electric drive system fails, the bus voltage fault can be coped with according to different bus voltage fault types, the normal operation of the electric drive system is maintained under the premise of protecting the high-voltage system, and therefore the driving experience of a driver is improved.

[0077] A bus voltage fault processing device provided by the embodiment of the application is introduced below. The bus voltage fault processing device described below can be referred to in combination with the bus voltage fault processing device described above.

[0078] Device embodiments

[0079] Referring to Figure 2 For the structure diagram of the bus voltage fault processing device provided by the embodiment, the structure diagram comprises:

[0080] The fault detection module 100 is configured to perform bus voltage fault detection on the electric drive system to obtain a bus voltage fault detection result.

[0081] The fault type determination module 200 is configured to determine the fault type of the bus voltage when the bus fault detection result is a fault.

[0082] The working mode determination module 300 is configured to determine whether the working mode of the motor in the electric drive system is a preset working mode corresponding to the fault type according to the fault type of the bus voltage.

[0083] The torque adjustment module 400 is configured to adjust the available torque of the motor in real time according to the bus voltage when the working mode of the motor is the preset working mode corresponding to the fault type, so as to maintain normal operation of the electric drive system.

[0084] Optionally, the fault detection module 100 is specifically configured to:

[0085] Obtain the bus voltage value of the electric drive system.

[0086] If the bus voltage value is in a preset fault value interval, it is determined that the bus voltage fault detection result is a fault.

[0087] Optionally, the fault type determination module 200 is specifically configured to:

[0088] When the bus voltage value is in a first preset fault value interval, it is determined that the fault type of the bus voltage is an overvoltage fault.

[0089] When the bus voltage value is in a second preset fault value interval, it is determined that the fault type of the bus voltage is an undervoltage fault.

[0090] Optionally, the working mode determination module 300 is specifically configured to:

[0091] When the fault type of the bus voltage is an overvoltage fault, it is determined whether the working mode of the motor in the electric drive system is a power generation mode.

[0092] When the fault type of the bus voltage is an overvoltage fault, it is determined whether the working mode of the motor in the electric drive system is a power generation mode.

[0093] Optionally, the device further includes a torque operation module, the torque operation module being configured to:

[0094] When the working mode of the motor is not a preset working mode corresponding to the fault type, the available torque of the motor is controlled to continue operating at a current torque.

[0095] Optionally, the torque adjustment module 400 is specifically configured to:

[0096] According to the bus voltage value, the available torque of the motor is linearly reduced.

[0097] Electronic device embodiments

[0098] Referring to Figure 3 , which is a structural schematic diagram of an electronic device provided by an embodiment of the present application, including:

[0099] The memory 11 is configured to store a computer program.

[0100] The processor 12 is configured to execute the computer program to implement the steps of the bus fault processing method described in any method embodiment.

[0101] In the embodiment, the device can be a vehicle-mounted computer, a PC (Personal Computer, personal computer), and can also be a smart phone, a tablet computer, a palm computer, a portable computer, and the like.

[0102] The device can include a memory 11, a processor 12, and a bus 13.

[0103] The memory 11 includes at least one type of readable storage medium, such as a flash memory, a hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory, etc.), a magnetic memory, a magnetic disk, an optical disk, etc. The memory 11 can be an internal storage unit of the device in some embodiments, such as a hard disk of the device. The memory 11 can also be an external storage device of the device in other embodiments, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the memory 11 can include both an internal storage unit and an external storage device. The memory 11 can be used to store application software installed in the device and various data, such as program codes for executing the fault prediction method, and to temporarily store data that has been output or will be output.

[0104] The processor 12 can be a central processing unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chip in some embodiments, and is used to run program codes stored in the memory 11 or process data, such as program codes for executing the fault prediction method.

[0105] The bus 13 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 3 Only one thick line is used to represent the bus in the figure, but it does not mean that there is only one bus or only one type of bus.

[0106] Further, the device can also include a network interface 14, which can optionally include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), and is usually used to establish a communication connection between the device and other electronic devices.

[0107] Optionally, the device can further include a user interface 15, which can include a display, an input unit such as a keyboard, and optionally the user interface 15 can further include a standard wired interface, a wireless interface. Optionally, in some embodiments, the display can be an LED display, a liquid crystal display, a touch liquid crystal display, an OLED (Organic Light-Emitting Diode) touch, and the like. Among them, the display can also be appropriately called a display screen or a display unit, which is used to display information processed in the device and to display a visualized user interface.

[0108] Figure 3 Only the device with components 11-15 is shown, and those skilled in the art can understand that, Figure 3 The structure shown does not constitute a limitation on the device, and can include fewer or more components than shown, or combine certain components, or different component arrangements.

[0109] Vehicle embodiments

[0110] The embodiments of the present application also provide a vehicle, which includes the memory and the processor in the above electronic device embodiments.

[0111] It should be noted that each of the embodiments in the present specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment mainly describes the difference from other embodiments. Especially, for the method and related device embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the related parts can refer to the part of the method embodiments. The above described method and related device embodiments are only illustrative, and the units described as separate components can be or can not be physically separated, and the components prompted as units can be or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. According to the actual needs, part or all of the modules can be selected to achieve the purpose of the embodiments. Those skilled in the art can understand and implement without creative labor.

[0112] The above describes only one specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A bus voltage fault handling method, characterized by, Applied to an electric drive system, comprising: Bus voltage fault detection is performed on the electric drive system to obtain a bus voltage fault detection result; If the bus fault detection result is a fault, a fault type of the bus voltage is determined; According to the fault type of the bus voltage, it is determined whether the working mode of the motor in the electric drive system is a preset working mode corresponding to the fault type; If the working mode of the motor is the preset working mode corresponding to the fault type, the available torque of the motor is adjusted in real time according to the bus voltage to maintain normal operation of the electric drive system; The fault type of the bus voltage includes overvoltage fault and undervoltage fault; The preset working mode at least includes power generation mode and motor mode; the determination of whether the working mode of the motor in the electric drive system is the preset working mode corresponding to the fault type according to the fault type of the bus voltage comprises: When the fault type of the bus voltage is the overvoltage fault, it is determined whether the working mode of the motor in the electric drive system is the power generation mode; When the fault type of the bus voltage is the undervoltage fault, it is determined whether the working mode of the motor in the electric drive system is the motor mode.

2. The method of claim 1, wherein, The bus voltage fault detection on the electric drive system to obtain the bus voltage fault detection result comprises: The bus voltage value of the electric drive system is obtained; If the bus voltage value is in a preset fault value interval, it is determined that the bus voltage fault detection result is a fault.

3. The method of claim 2, wherein, The preset fault value interval at least includes a first preset fault value interval and a second preset fault value interval, the minimum value in the first preset fault value interval is greater than the maximum value in the second preset fault value interval; the determination of the fault type of the bus voltage specifically comprises: When the bus voltage value is in the first preset fault value interval, it is determined that the fault type of the bus voltage is overvoltage fault; When the bus voltage value is in the second preset fault value interval, it is determined that the fault type of the bus voltage is undervoltage fault.

4. The method of claim 1, wherein, After determining whether the working mode of the motor in the electric drive system is the preset working mode corresponding to the fault type according to the fault type of the bus voltage, it further comprises: If the working mode of the motor is not the preset working mode corresponding to the fault type, the available torque of the motor is controlled to continue running at the current torque.

5. The method of claim 1, wherein, The real-time adjustment of the available torque of the motor according to the bus voltage specifically comprises: The available torque of the motor is linearly reduced according to the bus voltage value.

6. A bus voltage fault handling device, characterized by Applied to an electric drive system, comprising: A fault detection module is configured to perform bus voltage fault detection on the electric drive system to obtain a bus voltage fault detection result; A fault type determination module is configured to determine a fault type of the bus voltage when the bus fault detection result is a fault; A working mode determination module is configured to determine whether the working mode of the motor in the electric drive system is a preset working mode corresponding to the fault type according to the fault type of the bus voltage. The torque adjustment module is configured to, when the operation mode of the motor is a preset operation mode corresponding to the fault type, adjust the available torque of the motor in real time according to the bus voltage to maintain normal operation of the electric drive system. The fault type of the bus voltage includes an overvoltage fault and an undervoltage fault. The preset operation mode at least includes a power generation mode and a motor driving mode. The operation mode determination module is specifically configured to: determine whether the operation mode of the motor in the electric drive system is the power generation mode when the fault type of the bus voltage is the overvoltage fault; and 7. The apparatus of claim 6, wherein, determine whether the operation mode of the motor in the electric drive system is the motor driving mode when the fault type of the bus voltage is the undervoltage fault. The fault detection module is specifically configured to: obtain a bus voltage value of the electric drive system; and 8. An electronic device, comprising: determine that the bus voltage fault detection result is a fault if the bus voltage value is in a preset fault value interval. comprise: a memory configured to store a computer program; 9. A vehicle characterized by comprising: a processor configured to execute the computer program to implement the steps of the bus voltage fault processing method according to any one of claims 1 to 5. The electronic device according to claim 8.

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