Voltage fault diagnosis methods, devices, storage media, controllers, and vehicles

Abstract

This disclosure relates to a voltage fault detection method, apparatus, storage medium, controller, and vehicle. The method is applied to an electric vehicle, which includes a motor controller and a voltage converter. The motor controller and the voltage converter are connected in parallel to the same voltage bus. The method includes: detecting whether the bus voltage of the motor controller is undervoltage; if the bus voltage of the motor controller is undervoltage, detecting whether the bus voltage of the voltage converter is undervoltage; if the bus voltage of the voltage converter is also undervoltage, determining that the motor controller is in an undervoltage fault state. Embodiments of this disclosure can reduce the risk of false undervoltage fault reports from the motor controller, prevent the vehicle from losing power due to false motor controller fault reports during operation, and reduce the possibility of traffic accidents.

Description

Technical Field

[0001] This disclosure relates to the field of voltage fault detection technology, specifically to a voltage fault judgment method, device, storage medium, controller, and vehicle. Background Technology

[0002] Pure electric vehicles represent a crucial evolutionary path for the automotive industry's future development, and the motor controller of a pure electric vehicle is closely related to its safety performance. If the motor controller experiences an undervoltage fault, the motor will be unable to output sufficient power, leading to problems with normal vehicle operation.

[0003] Existing undervoltage detection methods rely solely on whether the bus voltage of the motor controller is below a certain threshold to determine if an undervoltage fault has occurred. This method is unreliable and easily affected by accidental factors, such as a momentary drop in the collected voltage signal due to environmental electromagnetic interference, which may lead to a false alarm of an undervoltage fault on the motor controller bus, resulting in misjudgment, abnormal vehicle control, and reduced vehicle driving safety. Summary of the Invention

[0004] The purpose of this disclosure is to provide a voltage fault detection method, device, storage medium, controller, and vehicle to reduce the risk of false undervoltage faults reported by the motor controller, prevent the vehicle from losing power due to false motor controller faults during driving, and thereby reduce the possibility of traffic accidents.

[0005] To achieve the above objectives, according to a first aspect of the present disclosure, a voltage fault determination method is provided, applied to an electric vehicle. The electric vehicle includes a motor controller and a voltage converter, the motor controller and the voltage converter being connected in parallel to the same voltage bus. The method includes: detecting whether the bus voltage of the motor controller is undervoltage; if the bus voltage of the motor controller is undervoltage, detecting whether the bus voltage of the voltage converter is undervoltage; and if both the bus voltage of the motor controller and the bus voltage of the voltage converter are undervoltage, determining that the motor controller is in an undervoltage fault state.

[0006] Optionally, detecting whether the bus voltage of the motor controller is undervoltage includes: detecting whether the bus voltage of the motor controller is less than a first undervoltage threshold; and determining that the bus voltage of the motor controller is undervoltage when the bus voltage of the motor controller is less than the first undervoltage threshold.

[0007] Optionally, detecting whether the bus voltage of the voltage converter is undervoltage includes: detecting whether the bus voltage of the voltage converter is less than a second undervoltage threshold; and determining that the bus voltage of the voltage converter is undervoltage when the bus voltage of the voltage converter is less than the second undervoltage threshold.

[0008] Optionally, detecting whether the bus voltage of the voltage converter is undervoltage when the bus voltage of the motor controller is undervoltage includes: after delaying for a first time when the bus voltage of the motor controller is detected to be undervoltage, detecting whether the bus voltage of the voltage converter is undervoltage.

[0009] Optionally, the method further includes: determining that the motor controller is in a normal voltage state when the bus voltage of the motor controller is undervoltage but the bus voltage of the voltage converter is not undervoltage.

[0010] Optionally, the electric vehicle includes an all-in-one controller, which includes the motor controller and the voltage converter. The motor controller and the voltage converter are housed in the same enclosure. The motor controller is an MCU, and the voltage converter includes at least one of DC-DC, OBC (AC slow charging), PDU (high voltage distribution), and DCAC.

[0011] According to a second aspect of the present disclosure, a voltage fault detection device is provided, applied to an electric vehicle. The electric vehicle includes a motor controller and a voltage converter, the motor controller and the voltage converter being connected in parallel to the same voltage bus. The device includes: a first detection module for detecting whether the bus voltage of the motor controller is undervoltage; a second detection module for detecting whether the bus voltage of the voltage converter is undervoltage when the bus voltage of the motor controller is undervoltage; and a determination module for determining that the motor controller is in an undervoltage fault state when both the bus voltage of the motor controller and the bus voltage of the voltage converter are undervoltage.

[0012] According to a third aspect of the present disclosure, a non-transitory computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, implements the steps of any of the methods described in the first aspect of the present disclosure.

[0013] According to a fourth aspect of the present disclosure, an all-in-one controller is provided, comprising: a memory having a computer program stored thereon; and a processor for executing the computer program in the memory to implement the steps of any of the methods described in the first aspect of the present disclosure.

[0014] According to a fifth aspect of the present disclosure, a vehicle is provided, including the all-in-one controller described in the fourth aspect of the present disclosure.

[0015] In summary, this disclosure provides a voltage fault determination method applied to an electric vehicle. The electric vehicle includes a motor controller and a voltage converter, which are connected in parallel to the same voltage bus. The method includes: detecting whether the bus voltage of the motor controller is undervoltage; if the bus voltage of the motor controller is undervoltage, detecting whether the bus voltage of the voltage converter is undervoltage; and if both the bus voltage of the motor controller and the bus voltage of the voltage converter are undervoltage, determining that the motor controller is in an undervoltage fault state. This disclosure, through dual detection and confirmation of the bus voltage, determines that the motor controller is in an undervoltage fault state only when both the bus voltage of the motor controller and the bus voltage of the voltage converter are undervoltage. This reduces the risk of the motor controller falsely reporting an undervoltage fault, preventing the vehicle from losing power due to a false alarm of a motor controller fault during operation, thereby reducing the possibility of traffic accidents.

[0016] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of one implementation scenario involved in the embodiments of this disclosure;

[0019] Figure 2 This is a flowchart illustrating a voltage fault detection method according to an exemplary embodiment;

[0020] Figure 3 This is a flowchart illustrating a voltage fault detection method according to another exemplary embodiment;

[0021] Figure 4 This is a block diagram illustrating a voltage fault detection device according to an exemplary embodiment;

[0022] Figure 5 This is a block diagram illustrating an all-in-one controller according to an exemplary embodiment;

[0023] Figure 6 This is a functional block diagram of a vehicle according to an exemplary embodiment. Detailed Implementation

[0024] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0025] It should be noted that all actions involving the acquisition of signals, information, or data in this disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the location is situated, and with authorization from the owner of the relevant device.

[0026] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0027] It should be understood that the steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect.

[0028] The term "comprising" and its variations as used herein are open-ended inclusions, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the description below.

[0029] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0030] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0031] The present disclosure will now be described in conjunction with specific embodiments.

[0032] First, the application scenarios of this disclosure will be explained. Figure 1 This is a schematic diagram of an implementation scenario involved in an embodiment of this disclosure, such as... Figure 1As shown, this disclosure applies to an electric vehicle, which includes a motor controller 100 and a voltage converter 200, which are connected in parallel to the same voltage bus. The electric vehicle also includes a multi-function controller 500, which may include the motor controller 100 and the voltage converter 200. Exemplarily, the motor controller 100 and the voltage converter 200 may be housed in the same enclosure. Exemplarily, the motor controller 100 may be an MCU (Microcontroller Unit), and the voltage converter 200 may include at least one of a DC-DC converter (Direct Current Converter), an OBC (On-board charger for AC slow charging), a PDU (Power Distribution Unit for high-voltage power distribution), or a DC-AC converter (Direct Current Alternating Current Converter).

[0033] Figure 2 This is a flowchart illustrating a voltage fault detection method according to an exemplary embodiment, such as... Figure 2 As shown, this voltage fault diagnosis method may include the following steps:

[0034] In step S210, it is detected whether the bus voltage of the motor controller is undervoltage.

[0035] In this step, the multi-function controller 500 collects the real-time voltage value of the bus of the motor controller 100, detects whether the voltage is normal, and determines that the bus voltage of the motor controller 100 is undervoltage when the voltage is lower than the normal reference value of the bus voltage.

[0036] In step S220, if the bus voltage of the motor controller is undervoltage, the bus voltage of the voltage converter is detected to be undervoltage.

[0037] In this step, when the bus voltage of the motor controller 100 is undervoltage, the multi-function controller 500 detects whether the bus voltage of the voltage converter 200 is undervoltage, and determines that the bus voltage of the voltage converter 200 is undervoltage when the voltage is less than the normal reference value of the bus voltage.

[0038] In step S230, if the bus voltage of the motor controller is undervoltage and the bus voltage of the voltage converter is also undervoltage, it is determined that the motor controller is in an undervoltage fault state.

[0039] In this step, when the bus voltage of the motor controller 100 is low and the bus voltage of the voltage converter 200 is also low, the multi-function controller 500 determines that the motor controller 100 is in an undervoltage fault state.

[0040] In summary, this disclosure provides a voltage fault determination method applied to an electric vehicle. The electric vehicle includes a motor controller and a voltage converter, which are connected in parallel to the same voltage bus. The method includes: detecting whether the bus voltage of the motor controller is undervoltage; if the bus voltage of the motor controller is undervoltage, detecting whether the bus voltage of the voltage converter is undervoltage; and if both the bus voltage of the motor controller and the bus voltage of the voltage converter are undervoltage, determining that the motor controller is in an undervoltage fault state. This disclosure, through dual detection and confirmation of the bus voltage, determines that the motor controller is in an undervoltage fault state only when both the bus voltage of the motor controller and the bus voltage of the voltage converter are undervoltage. This reduces the risk of the motor controller falsely reporting an undervoltage fault, preventing the vehicle from losing power due to a false alarm of a motor controller fault during operation, thereby reducing the possibility of traffic accidents.

[0041] Figure 3 This is a flowchart illustrating a voltage fault detection method according to another exemplary embodiment, such as... Figure 3 As shown, this voltage fault diagnosis method may include the following steps:

[0042] In step S310, it is detected whether the bus voltage of the motor controller is less than the first undervoltage threshold; when the bus voltage of the motor controller is less than the first undervoltage threshold, it is determined that the bus voltage of the motor controller is undervoltage.

[0043] In this step, the all-in-one controller 500 detects whether the bus voltage of the motor controller 100 is less than a first undervoltage threshold. For example, the first undervoltage threshold can be 95% of the standard reference voltage of the voltage bus. When the bus voltage of the motor controller 100 is less than the first undervoltage threshold, it is determined that the bus voltage of the motor controller 100 is undervoltage.

[0044] In step S320, when the undervoltage of the bus voltage of the motor controller is detected, after a first delay time, the undervoltage of the bus voltage of the voltage converter is detected.

[0045] In this step, when the all-in-one controller 500 detects an undervoltage on the bus voltage of the motor controller 100, it delays for a first time, exemplarily 500ms, before detecting whether the bus voltage of the voltage converter 200 is undervoltage. By delaying the detection of undervoltage on the bus voltage of the voltage converter 200 by a time interval equal to the first delay when undervoltage is detected on the bus voltage of the motor controller 100, it avoids misjudging undervoltage by the motor controller 100 due to sudden drops in bus voltage caused by occasional environmental factors, such as strong electromagnetic interference, and the bus voltage returning to normal after the disappearance of such occasional environmental factors.

[0046] In step S330, it is detected whether the bus voltage of the voltage converter is less than the second undervoltage threshold; when the bus voltage of the voltage converter is less than the second undervoltage threshold, it is determined that the bus voltage of the voltage converter is undervoltage.

[0047] In this step, the all-in-one controller 500 detects whether the bus voltage of the voltage converter 200 is less than a second undervoltage threshold. For example, the second undervoltage threshold can be 90% of the standard reference voltage of the voltage bus. When the bus voltage of the voltage converter 200 is less than the second undervoltage threshold, it is determined that the bus voltage of the voltage converter 200 is undervoltage.

[0048] In step S340, if the bus voltage of the motor controller is undervoltage and the bus voltage of the voltage converter is also undervoltage, it is determined that the motor controller is in an undervoltage fault state.

[0049] In this step, when the bus voltage of the motor controller 100 is low and the bus voltage of the voltage converter 200 is also low, the multi-function controller 500 determines that the motor controller 100 is in an undervoltage fault state.

[0050] In step S350, if the bus voltage of the motor controller is undervoltage but the bus voltage of the voltage converter is not undervoltage, it is determined that the motor controller is in a normal voltage state.

[0051] In this step, if the bus voltage of the motor controller 100 is undervoltage but the bus voltage of the voltage converter 200 is not undervoltage, the multi-function controller 500 determines that the motor controller 100 is in a normal voltage state.

[0052] In summary, the embodiments of this disclosure provide a voltage fault judgment method. When the bus voltage of the motor controller 100 is detected to be undervoltage, the method further delays the detection of whether the bus voltage of the voltage converter 200 is undervoltage after a first delay time. Only when both the bus voltage of the motor controller 100 and the bus voltage of the voltage converter 200 are undervoltage is the motor controller 100 determined to be in an undervoltage fault state. This can avoid the false judgment of undervoltage of the motor controller 100 caused by a sudden drop in bus voltage due to occasional environmental factors, such as strong electromagnetic interference, and the bus voltage returning to normal after the disappearance of such occasional environmental factors. This can reduce the risk of false undervoltage faults reported by the motor controller and prevent the vehicle from losing power due to false motor controller faults during driving, thereby reducing the possibility of driving accidents.

[0053] Figure 4 This is a block diagram illustrating a voltage fault detection device 400 according to an exemplary embodiment. The voltage fault detection device 400 is applied to an electric vehicle. The electric vehicle includes a motor controller 100 and a voltage converter 200. The motor controller 100 and the voltage converter 200 are connected in parallel to the same voltage bus. The electric vehicle also includes a multi-function controller 500, which includes the motor controller 100 and the voltage converter 200. The motor controller 100 and the voltage converter 200 are housed in the same enclosure. The motor controller 100 can be an MCU, and the voltage converter 200 can include at least one of DC-DC converter, OBC converter, PDU converter, and DCAC converter.

[0054] The voltage fault detection device 400 can be implemented as part or all of the all-in-one controller 500 through software, hardware, or a combination of both. See [link / reference]. Figure 4 The voltage fault detection device 400 may include:

[0055] The first detection module 410 is used to detect whether the bus voltage of the motor controller is undervoltage;

[0056] The second detection module 420 is used to detect whether the bus voltage of the voltage converter is undervoltage when the bus voltage of the motor controller is undervoltage.

[0057] The determination module 430 is used to determine that the motor controller is in an undervoltage fault state when the bus voltage of the motor controller is undervoltage and the bus voltage of the voltage converter is also undervoltage.

[0058] Optionally, the first detection module 410 is further configured to detect whether the bus voltage of the motor controller is less than a first undervoltage threshold.

[0059] When the bus voltage of the motor controller is less than the first undervoltage threshold, the bus voltage of the motor controller is determined to be undervoltage.

[0060] Optionally, the second detection module 420 is further configured to detect whether the bus voltage of the voltage converter is less than a second undervoltage threshold.

[0061] When the bus voltage of the voltage converter is less than the second undervoltage threshold, the bus voltage of the voltage converter is determined to be undervoltage.

[0062] Optionally, the second detection module 420 is further configured to detect whether the bus voltage of the voltage converter is undervoltage after a first delay time when the undervoltage of the bus voltage of the motor controller is detected.

[0063] Optionally, the determination module 430 is further configured to determine that the motor controller is in a normal voltage state when the bus voltage of the motor controller is undervoltage and the bus voltage of the voltage converter is not undervoltage.

[0064] In summary, this disclosure provides a voltage fault detection device 400, which may include: a first detection module 410 for detecting whether the bus voltage of the motor controller is undervoltage; a second detection module 420 for detecting whether the bus voltage of the voltage converter is undervoltage when the bus voltage of the motor controller is undervoltage; and a determination module 430 for determining that the motor controller is in an undervoltage fault state when both the bus voltage of the motor controller and the bus voltage of the voltage converter are undervoltage. This disclosure, through dual detection and confirmation of the bus voltage, determines that the motor controller 100 is in an undervoltage fault state only when both the bus voltage of the motor controller 100 and the bus voltage of the voltage converter 200 are undervoltage. This reduces the risk of false undervoltage fault reports from the motor controller, preventing the vehicle from losing power due to false motor controller fault reports during operation, thereby reducing the possibility of traffic accidents.

[0065] Figure 5 This is a block diagram illustrating an all-in-one controller according to an exemplary embodiment. Figure 5 As shown, the all-in-one controller 500 may include: a processor 501 and a memory 502. The all-in-one controller 500 may also include one or more of the following: a multimedia component 503, an input / output (I / O) interface 504, and a communication component 505.

[0066] The processor 501 controls the overall operation of the all-in-one controller 500 to complete all or part of the steps in the voltage fault diagnosis method described above. The memory 502 stores various types of data to support the operation of the all-in-one controller 500. This data may include, for example, instructions for any application or method operating on the all-in-one controller 500, and application-related data such as contact data, sent and received messages, pictures, audio, video, etc. The memory 502 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. Multimedia component 503 may include a screen and an audio component. The screen may be, for example, a touchscreen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in memory 502 or transmitted via communication component 505. The audio component also includes at least one speaker for outputting audio signals. I / O interface 504 provides an interface between processor 501 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual or physical buttons. Communication component 505 is used for wired or wireless communication between the all-in-one controller 500 and other devices. Wireless communication may include Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, or 5G, NB-IoT (Narrow Band Internet of Things), or one or more combinations thereof; therefore, the corresponding communication component 505 may include a Wi-Fi module, a Bluetooth module, or an NFC module.

[0067] In an exemplary embodiment, the all-in-one controller 500 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the voltage fault determination method described above.

[0068] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implement the steps of the voltage fault determination method described above. For example, the computer-readable storage medium may be the memory 502 including program instructions described above, which may be executed by the processor 501 of the all-in-one controller 500 to complete the voltage fault determination method described above.

[0069] In some embodiments, this disclosure also provides a vehicle including the all-in-one controller described in the above embodiments. Figure 6 This is a block diagram illustrating a vehicle according to an exemplary embodiment. For example, vehicle 600 may be a hybrid vehicle, a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other type of vehicle. Vehicle 600 may be an autonomous vehicle, a semi-autonomous vehicle, or a non-autonomous vehicle.

[0070] Reference Figure 6 The vehicle 600 may include various subsystems, such as an infotainment system 610, a perception system 620, a decision control system 630, a drive system 640, and a computing platform 650. The vehicle 600 may also include more or fewer subsystems, and each subsystem may include multiple components. Furthermore, each subsystem and each component of the vehicle 600 can be interconnected via wired or wireless means.

[0071] In some embodiments, the infotainment system 610 may include a communication system, an entertainment system, and a navigation system, etc.

[0072] The perception system 620 may include several sensors for sensing information about the environment surrounding the vehicle 600. For example, the perception system 620 may include a global positioning system (which may be GPS, BeiDou, or other positioning systems), an inertial measurement unit (IMU), lidar, millimeter-wave radar, ultrasonic radar, and a camera device.

[0073] The decision control system 630 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0074] The drive system 640 may include components that provide powered motion to the vehicle 600. In one embodiment, the drive system 640 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of internal combustion engines, electric motors, and compressed air engines. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0075] Some or all of the functions of vehicle 600 are controlled by computing platform 650. Computing platform 650 may be an all-in-one controller and may include at least one processor 651 and memory 652. Processor 651 may execute instructions 653 stored in memory 652.

[0076] Processor 651 can be any conventional processor, such as a commercially available CPU. The processor may also include, for example, a Graphics Processing Unit (GPU), a Field Programmable Gate Array (FPGA), a System on Chip (SOC), an Application Specific Integrated Circuit (ASIC), or a combination thereof.

[0077] The memory 652 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0078] In addition to instruction 653, memory 652 can also store data, such as road maps, route information, vehicle position, direction, speed, and other data. The data stored in memory 652 can be used by computing platform 650.

[0079] In this embodiment of the disclosure, the processor 651 may be an MCU, which can execute instruction 653 to complete all or part of the steps of the voltage fault judgment method described above.

[0080] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0081] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0082] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A voltage fault determination method, characterized by, The method is applied to an electric vehicle, the electric vehicle comprising a motor controller and a voltage converter, the motor controller and the voltage converter being connected in parallel to the same voltage bus, and the method comprising: detecting whether the bus voltage of the motor controller is under-voltage; in the case where the bus voltage of the motor controller is under-voltage, detecting whether the bus voltage of the voltage converter is under-voltage; in the case where the bus voltage of the motor controller is under-voltage and the bus voltage of the voltage converter is also under-voltage, determining that the motor controller is in an under-voltage fault state; wherein the detection of whether the bus voltage of the voltage converter is under-voltage in the case where the bus voltage of the motor controller is under-voltage comprises: after a first delay time is delayed after detecting that the bus voltage of the motor controller is under-voltage, detecting whether the bus voltage of the voltage converter is under-voltage.

2. The method of claim 1, wherein, The detection of whether the bus voltage of the motor controller is under-voltage comprises: detecting whether the bus voltage of the motor controller is less than a first under-voltage threshold; in the case where the bus voltage of the motor controller is less than the first under-voltage threshold, determining that the bus voltage of the motor controller is under-voltage.

3. The method of claim 1, wherein, The detection of whether the bus voltage of the voltage converter is under-voltage comprises: detecting whether the bus voltage of the voltage converter is less than a second under-voltage threshold; in the case where the bus voltage of the voltage converter is less than the second under-voltage threshold, determining that the bus voltage of the voltage converter is under-voltage.

4. The method of claim 1, wherein, The method further comprises: in the case where the bus voltage of the motor controller is under-voltage and the bus voltage of the voltage converter is not under-voltage, determining that the motor controller is in a voltage normal state.

5. The method according to any one of claims 1 to 4, characterized in that, The electric vehicle comprises a multi-in-one controller, the multi-in-one controller comprising the motor controller and the voltage converter, the motor controller and the voltage converter being arranged in the same box, the motor controller being an MCU, and the voltage converter comprising at least one of a DCDC, an OBC, a PDU, and a DCAC.

6. A voltage failure determination device characterized by comprising: The method is applied to an electric vehicle, the electric vehicle comprising a motor controller and a voltage converter, the motor controller and the voltage converter being connected in parallel to the same voltage bus, and the method comprising: a first detection module configured to detect whether the bus voltage of the motor controller is under-voltage; a second detection module configured to, in the case where the bus voltage of the motor controller is under-voltage, detect whether the bus voltage of the voltage converter is under-voltage; a determination module configured to, in the case where the bus voltage of the motor controller is under-voltage and the bus voltage of the voltage converter is also under-voltage, determine that the motor controller is in an under-voltage fault state; wherein the detection of whether the bus voltage of the voltage converter is under-voltage in the case where the bus voltage of the motor controller is under-voltage comprises: after a first delay time is delayed after detecting that the bus voltage of the motor controller is under-voltage, detecting whether the bus voltage of the voltage converter is under-voltage.

7. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the steps of the method of any one of claims 1-5.

8. A multi-combined controller characterized by comprising: comprising: a memory having a computer program stored thereon; a processor for executing the computer program in the memory to implement the steps of the method of any of claims 1-5.

9. A vehicle characterized by comprising: a multi-in-one controller as claimed in claim 8.

Images