Insulation fault positioning method and device of vehicle, electronic equipment and storage medium

Abstract

The invention provides a vehicle insulation fault positioning method and device, electronic equipment and a storage medium. The method comprises the steps that when an insulation fault occurs to a vehicle, the vehicle is controlled to be powered off; contactors of all parts of the high-voltage system of the vehicle are sequentially disconnected, and whether the parts are fault parts or not is detected based on an insulation detector of the high-voltage system of the vehicle; determining whether the fault component affects driving of the vehicle; if the fault part affects running of the vehicle, the high-voltage system of the vehicle is not powered on after the vehicle is powered on next time; and if the fault part does not affect the running of the vehicle, the high-voltage system of the vehicle is powered on after the vehicle is powered on next time, and the fault part is not connected with the high-voltage system of the vehicle. In the mode, fault parts can be automatically determined, and maintenance personnel do not need to exclude equipment one by one; and whether the fault part affects the running of the vehicle can be determined, so that the vehicle can continue to run after the insulation fault is sent until the vehicle enters the station for maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle fault diagnosis, and in particular to a method, a device, an electronic device and a storage medium for locating an insulation fault of a vehicle. Background Art

[0002] At present, in order to detect the insulation risk of the high-voltage circuit of electric vehicles, an insulation tester is generally installed on the vehicle controller to detect the insulation performance of the high-voltage components of electric vehicles in real time. After an insulation fault occurs, the vehicle controller can perform corresponding fault processing according to the alarm level of the insulation fault, for example: power limitation or stopping driving through the vehicle controller.

[0003] However, the repair of insulation failure requires maintenance personnel to use an external insulation tester to disconnect the high-voltage connection harness of the vehicle's high-voltage components. The maintenance personnel then test the high-voltage components one by one to confirm the faulty component, and then repair and replace the faulty component.

[0004] Therefore, it is difficult to eliminate insulation faults in existing vehicles. Professional maintenance personnel need to use professional insulation testers to test high-voltage components one by one to confirm the faulty parts. In addition, after an insulation fault occurs in a vehicle, the faulty parts cannot be automatically located. The vehicle can only be driven with limited power according to the insulation fault level or even break down. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a vehicle insulation fault positioning method, device, electronic device and storage medium, which can automatically determine the faulty component after an insulation fault occurs in the vehicle, and maintenance personnel no longer need to eliminate the fault one by one; it can also determine whether the faulty component affects the driving of the vehicle. If the faulty component does not affect the driving of the vehicle, the high-voltage system of the vehicle can still be powered on after the vehicle is powered on next time. It is only necessary to disconnect the faulty component from the high-voltage system of the vehicle, so that the vehicle can continue to drive after sending the insulation fault until it enters the station for maintenance.

[0006] In a first aspect, an embodiment of the present invention provides a method for locating an insulation fault of a vehicle, the method comprising: when an insulation fault occurs in the vehicle, controlling the vehicle to be powered off; disconnecting the contactors of various components of the vehicle's high-voltage system in sequence, and detecting whether the component is a faulty component based on an insulation tester of the vehicle's high-voltage system; determining whether the faulty component affects the driving of the vehicle; if the faulty component affects the driving of the vehicle, the high-voltage system of the vehicle is not powered on after the vehicle is powered on next time; if the faulty component does not affect the driving of the vehicle, the high-voltage system of the vehicle is powered on after the vehicle is powered on next time and the faulty component is not connected to the high-voltage system of the vehicle.

[0007] In an optional embodiment of the present application, the above method also includes: detecting whether an insulation fault occurs in the vehicle based on an insulation detector of the vehicle's high-voltage system.

[0008] In an optional embodiment of the present application, the above-mentioned step of disconnecting the contactors of various components of the vehicle's high-voltage system in sequence includes: pre-setting the detection priority of various components of the vehicle's high-voltage system; and disconnecting the contactors of various components of the vehicle's high-voltage system in sequence based on the detection priority.

[0009] In an optional embodiment of the present application, the step of detecting whether a component is a faulty component by an insulation tester based on a vehicle's high-voltage system includes: after the contactor of the component is disconnected, detecting whether the insulation fault of the vehicle is restored by the insulation tester based on the vehicle's high-voltage system; if the insulation fault of the vehicle is restored, determining that the component is a faulty component; if the insulation fault of the vehicle is not restored, determining that the component is not a faulty component.

[0010] In an optional embodiment of the present application, after the above-mentioned step of detecting whether a component is a faulty component by an insulation tester based on the vehicle's high-voltage system, the method further includes: storing the faulty component in a vehicle controller of the vehicle.

[0011] In an optional embodiment of the present application, the vehicle controller of the above-mentioned vehicle pre-stores recorded data on whether various components of the vehicle's high-voltage system affect the vehicle's driving after an insulation failure occurs; the step of determining whether the faulty component affects the vehicle's driving includes: the vehicle controller determines whether the faulty component affects the vehicle's driving based on the recorded data.

[0012] In an optional embodiment of the present application, after the above step of determining whether the faulty component affects the driving of the vehicle, the method further includes: if the faulty component affects the driving of the vehicle, sending information on the insulation failure of the faulty component to the terminal device of the maintenance personnel.

[0013] In an optional embodiment of the present application, after the above step of determining whether the faulty component affects the driving of the vehicle, the method further includes: if the faulty component does not affect the driving of the vehicle, displaying information that an insulation failure has occurred in the faulty component on the dashboard of the vehicle.

[0014] In an optional embodiment of the present application, the above-mentioned high-voltage system includes: multiple components, multiple contactors and insulation testers; wherein the components and contactors correspond one to one.

[0015] In an optional embodiment of the present application, the components of the above-mentioned high-voltage system include at least one of the following: a main drive component, an air conditioning component, an air pump component, an oil pump component, a DC / DC conversion component or a defrost component.

[0016] In a second aspect, an embodiment of the present invention further provides an insulation fault locating device for a vehicle, the device comprising: a vehicle power-off control module, used to control the vehicle to power off when an insulation fault occurs in the vehicle; a fault component detection module, used to sequentially disconnect the contactors of various components of the vehicle's high-voltage system, and detect whether the component is a faulty component based on an insulation detector of the vehicle's high-voltage system; a driving impact judgment module, used to determine whether the faulty component affects the driving of the vehicle; a first fault component processing module, used to prevent the high-voltage system of the vehicle from being powered on next time the vehicle is powered on if the faulty component affects the driving of the vehicle; and a second fault component processing module, used to prevent the high-voltage system of the vehicle from being powered on next time the vehicle is powered on if the faulty component does not affect the driving of the vehicle.

[0017] In a third aspect, an embodiment of the present invention further provides an electronic device, including a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the above-mentioned vehicle insulation fault locating method.

[0018] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the above-mentioned vehicle insulation fault locating method.

[0019] The embodiments of the present invention bring the following beneficial effects: The embodiment of the present invention provides a method, device, electronic device and storage medium for locating insulation faults of a vehicle. When an insulation fault occurs in the vehicle, the vehicle is controlled to be powered off; the contactors of various components of the high-voltage system of the vehicle are disconnected in sequence, and the insulation detector of the high-voltage system of the vehicle is used to detect whether the component is a faulty component; it is determined whether the faulty component affects the driving of the vehicle; if the faulty component affects the driving of the vehicle, the high-voltage system of the vehicle is not powered on after the vehicle is powered on next time; if the faulty component does not affect the driving of the vehicle, the high-voltage system of the vehicle is powered on after the vehicle is powered on next time, and the faulty component is not connected to the high-voltage system of the vehicle. In this way, the faulty component can be automatically determined after an insulation fault occurs in the vehicle, and maintenance personnel no longer need to eliminate the faulty components one by one; it can also be determined whether the faulty component affects the driving of the vehicle. If the faulty component does not affect the driving of the vehicle, the high-voltage system of the vehicle can still be powered on after the vehicle is powered on next time, and the faulty component only needs to be disconnected from the high-voltage system of the vehicle, so that the vehicle can continue to drive after sending the insulation fault until it enters the station for maintenance.

[0020] Other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present disclosure.

[0021] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A flow chart of a method for locating insulation faults of a vehicle provided by an embodiment of the present invention; Figure 2 A flow chart of another method for locating insulation faults of a vehicle provided by an embodiment of the present invention; Figure 3 A schematic diagram of a method for locating insulation faults of a vehicle provided by an embodiment of the present invention; Figure 4 A topological schematic diagram of a high voltage system provided by an embodiment of the present invention; Figure 5 A schematic structural diagram of a vehicle insulation fault locating device provided by an embodiment of the present invention; Figure 6 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] At present, in order to detect the insulation risk of the high-voltage circuit of electric vehicles, an insulation tester is generally installed on the vehicle controller to detect the insulation performance of the high-voltage components of electric vehicles in real time. After an insulation fault occurs, the vehicle controller can perform corresponding fault processing according to the alarm level of the insulation fault, for example: power limitation or stopping driving through the vehicle controller.

[0026] However, the repair of insulation failure requires maintenance personnel to use an external insulation tester to disconnect the high-voltage connection harness of the vehicle's high-voltage components. The maintenance personnel then test the high-voltage components one by one to confirm the faulty component, and then repair and replace the faulty component.

[0027] Therefore, it is difficult to eliminate insulation faults in existing vehicles. Professional maintenance personnel need to use professional insulation testers to test high-voltage components one by one to confirm the faulty parts. In addition, after an insulation fault occurs in a vehicle, the faulty parts cannot be automatically located. The vehicle can only be driven with limited power according to the insulation fault level or even break down.

[0028] Based on this, the embodiments of the present invention provide a method, device, electronic device and storage medium for locating the insulation fault of a vehicle, which specifically provides a precise insulation fault positioning strategy for electric vehicles. The insulation detector can be used to automatically control the disconnection and closing of different contactors in the high-voltage circuit through the vehicle controller to directly confirm the faulty component, and maintenance personnel no longer need to eliminate the equipment one by one. After accurately locating the faulty component, it can also automatically determine whether the faulty component affects the driving of the vehicle. If the faulty component does not affect the driving of the vehicle, the high-voltage system of the vehicle can still be powered on after the vehicle is powered on next time. It only needs the faulty component to be disconnected from the high-voltage system of the vehicle, so that the vehicle can continue to drive after sending the insulation fault until it enters the station for maintenance.

[0029] To facilitate understanding of this embodiment, a vehicle insulation fault locating method disclosed in an embodiment of the present invention is first introduced in detail.

[0030] Embodiment 1: The embodiment of the present invention provides a method for locating an insulation fault of a vehicle. Figure 1 A flow chart of a method for locating an insulation fault of a vehicle is shown, and the method for locating an insulation fault of a vehicle comprises the following steps: Step S102, when an insulation fault occurs in the vehicle, the vehicle is controlled to be powered off.

[0031] Insulation failure in electric vehicles refers to leakage or reduced resistance in the circuit between the positive and negative electrodes of the high-voltage battery and the electric chassis. This failure is usually caused by electrolyte leakage inside the battery. When the leakage reaches a certain level, the insulation layer will be destroyed, forming a conductive loop between the battery module and the monomer, and the electric vehicle system will automatically prompt an insulation failure.

[0032] In some embodiments, whether an insulation fault occurs in the vehicle may be detected based on an insulation tester of the high voltage system of the vehicle.

[0033] The insulation tester is a device for online real-time detection and management of the insulation status of the busbar and branch of the DC power supply system. It is also called insulation tester, insulation instrument, DC screen insulation instrument, photovoltaic insulation instrument, and electric vehicle insulation instrument.

[0034] The insulation tester can be set in the high-voltage system of the vehicle to detect whether the current, voltage and / or resistance of the high-voltage system meet the preset requirements. If the current, voltage and / or resistance of the high-voltage system do not meet the preset requirements, it can be determined that the vehicle has an insulation fault.

[0035] Among them, in this embodiment, when an insulation fault occurs in the vehicle, the vehicle can be controlled to be powered off first.

[0036] Step S104 , disconnecting contactors of various components of the high-voltage system of the vehicle in sequence, and detecting whether a component is a faulty component based on an insulation tester of the high-voltage system of the vehicle.

[0037] This embodiment can disconnect the contactors of various components of the high-voltage system of the vehicle in sequence. After disconnecting the contactor of component X, it can be detected whether component X is a faulty component based on the insulation tester of the high-voltage system of the vehicle.

[0038] Step S106, determining whether the faulty component affects the driving of the vehicle.

[0039] After determining the faulty component, this embodiment may also determine whether the faulty component affects the driving of the vehicle.

[0040] Step S108: If the faulty component affects the driving of the vehicle, the high voltage system of the vehicle will not be powered on when the vehicle is powered on next time.

[0041] If the faulty component affects the driving of the vehicle, the high-voltage system of the vehicle at this time cannot be powered on again. Therefore, even if the vehicle is powered on next time, the high-voltage system of the vehicle will not be powered on.

[0042] Step S110: If the faulty component does not affect the driving of the vehicle, the high-voltage system of the vehicle is powered on after the vehicle is powered on next time and the faulty component is not connected to the high-voltage system of the vehicle.

[0043] If the faulty component does not affect the driving of the vehicle, the high-voltage system of the vehicle can be powered on at this time, and it is only necessary to ensure that the faulty component is not connected to the high-voltage system of the vehicle. Therefore, the high-voltage system of the vehicle can be powered on after the vehicle is powered on next time, and the faulty component is not connected to the high-voltage system of the vehicle. As a result, the vehicle can continue to drive after sending an insulation fault until it enters the station for maintenance.

[0044] The embodiment of the present invention provides a method for locating insulation faults of a vehicle. When an insulation fault occurs in the vehicle, the vehicle is controlled to be powered off; the contactors of various components of the high-voltage system of the vehicle are disconnected in sequence, and the insulation detector of the high-voltage system of the vehicle is used to detect whether the component is a faulty component; it is determined whether the faulty component affects the driving of the vehicle; if the faulty component affects the driving of the vehicle, the high-voltage system of the vehicle is not powered on after the vehicle is powered on next time; if the faulty component does not affect the driving of the vehicle, the high-voltage system of the vehicle is powered on after the vehicle is powered on next time, and the faulty component is not connected to the high-voltage system of the vehicle. In this way, the faulty component can be automatically determined after an insulation fault occurs in the vehicle, and maintenance personnel no longer need to eliminate the faulty components one by one; it can also be determined whether the faulty component affects the driving of the vehicle. If the faulty component does not affect the driving of the vehicle, the high-voltage system of the vehicle can still be powered on after the vehicle is powered on next time, and the faulty component only needs to be disconnected from the high-voltage system of the vehicle, so that the vehicle can continue to drive after sending the insulation fault until it enters the station for maintenance.

[0045] Embodiment 2: This embodiment provides another method for locating insulation faults in a vehicle. This method is implemented on the basis of the above embodiment. Figure 2 A flow chart of another method for locating insulation faults of a vehicle is shown, and the method for locating insulation faults of a vehicle comprises the following steps: Step S202, when an insulation fault occurs in the vehicle, the vehicle is controlled to be powered off.

[0046] See also Figure 3 A schematic diagram of a method for locating an insulation fault of a vehicle is shown. When an insulation fault occurs in the vehicle, the driver can turn off the vehicle key to control the vehicle to power off.

[0047] Step S204 , disconnecting contactors of various components of the high-voltage system of the vehicle in sequence, and detecting whether a component is a faulty component based on an insulation tester of the high-voltage system of the vehicle.

[0048] In some embodiments, the detection priority of each component of the high-voltage system of the vehicle may be preset; and the contactors of each component of the high-voltage system of the vehicle may be disconnected in sequence based on the detection priority.

[0049] In this embodiment, the detection order of each component of the high-voltage system can be determined by pre-setting the detection priority, so as to ensure that the components with high priority are detected first, thereby improving the safety of insulation fault location. For example: the high-voltage system includes components 1-5, and the priority of component 1 can be set>the priority of component 3>the priority of component 4>the priority of component 2>the priority of component 5. Therefore, the contactors of the components can be disconnected in sequence in the order of component 1, component 3, component 4, component 2, and component 5 to detect whether the components are faulty.

[0050] In some embodiments, the above-mentioned high voltage system includes: a plurality of components, a plurality of contactors and an insulation tester; wherein the components and the contactors correspond one to one.

[0051] The components of the high-pressure system include at least one of the following: a main drive component, an air conditioning component, an air pump component, an oil pump component, a DC / DC conversion component or a defrost component.

[0052] See also Figure 4 A topological schematic diagram of a high-voltage system is shown, and the components of the high-voltage system include: a main drive component, an air conditioning component, an air pump component, an oil pump component, a direct current / direct current (DC-DC, Direct Current-Direct Current) conversion component and a defrost component.

[0053] In some embodiments, after the contactor of the component is disconnected, an insulation tester based on the vehicle's high-voltage system detects whether the vehicle's insulation fault has been restored; if the vehicle's insulation fault has been restored, the component is determined to be a faulty component; if the vehicle's insulation fault has not been restored, the component is determined not to be a faulty component.

[0054] like Figure 3 and Figure 4 As shown, after disconnecting the total negative contactor k7, the positive contactor k5 of the DC-DC conversion component can be disconnected first to determine whether the insulation fault of the vehicle has been restored. If so, it can be determined that the DC-DC conversion component is a faulty component. If not, the positive contactor k4 of the oil pump component can be disconnected to determine whether the insulation fault of the vehicle has been restored. If so, it can be determined that the oil pump component is a faulty component. If not, the positive contactor k3 of the air pump component can be disconnected to determine whether the insulation fault of the vehicle has been restored. If so, it can be determined that the air pump component is a faulty component. If not, the contactors can be disconnected one by one to determine whether the insulation fault of the vehicle has been restored until all components have been determined to be faulty components. This allows accurate positioning of the faulty component.

[0055] In addition, if Figure 3 and Figure 4 As shown, the detection priority of the DC-DC conversion component > the detection priority of the oil pump component > the detection priority of the air pump component.

[0056] In some embodiments, after the insulation tester of the high voltage system of the vehicle detects whether a component is a faulty component, the faulty component may be stored in the vehicle controller of the vehicle.

[0057] like Figure 3 As shown, after determining that a DC-DC conversion component, an oil pump component or an air pump component is a faulty component, the faulty component can be stored in a vehicle controller of the vehicle.

[0058] The vehicle controller is a key part of the vehicle's electronic control system for pure electric vehicles. It can reasonably distribute energy, similar to the engine management system (EMS) in traditional internal combustion engine vehicles, to maximize the utilization efficiency of the on-board battery energy.

[0059] The electronic control unit of the vehicle controller is the core of the vehicle controller. Nowadays, there are more and more electronic devices on electric vehicles, and the control system is becoming more and more complex. The vehicle controller can ensure the safe and reliable driving of the vehicle, and it is of great significance to improve the efficiency of data transmission between control systems. The system can realize functions such as motor drive control, temperature control, and energy management control. It is mainly composed of subsystems such as sensor input and switch system, system drive output, and control unit output system.

[0060] The vehicle controller is mainly composed of hardware and software. The hardware includes the housing and hardware circuit, and the software is divided into application software and underlying software. The housing is mainly used for the protection and sealing of the hardware circuit. It must meet the cleanliness requirements such as waterproof and dustproof, and also meet the mechanical requirements such as avoiding falling and vibration. The hardware circuit is mainly composed of the main control chip (32-bit processing chip) and the peripheral clock circuit, reset circuit, power module, and is generally equipped with digital signal / analog signal processing circuit, frequency signal processing circuit and communication interface circuit. Application software and underlying software are generally written in C language. The application software is mainly the upper-level control strategy, which is mainly responsible for real-time control of energy flow and distribution ratio according to vehicle status and driver intention. The underlying software is mainly responsible for the initialization setting of the single-chip microcomputer, the real-time transmission and reception of the controller area network (CAN, Controller Area Network) bus signal, and the real-time processing and diagnosis of input and output signals.

[0061] Step S206: The vehicle controller of the vehicle determines whether the faulty component affects the driving of the vehicle based on the recorded data.

[0062] like Figure 3 As shown, the vehicle controller of the vehicle pre-stores the recorded data of whether the various components of the vehicle's high-voltage system affect the driving of the vehicle after the insulation failure occurs. Figure 3 After the driver turns on the key and powers on the vehicle, the vehicle controller can determine whether the faulty component affects the driving of the vehicle based on the above recorded data. The vehicle controller can accurately and quickly determine whether the faulty component affects the driving of the vehicle through the above recorded data.

[0063] The above-mentioned recorded data may be set before the vehicle leaves the factory, or updated after the vehicle leaves the factory, which is not limited in this embodiment.

[0064] Step S208: If the faulty component affects the driving of the vehicle, the high voltage system of the vehicle will not be powered on when the vehicle is powered on next time.

[0065] In some embodiments, if the faulty component affects the driving of the vehicle, information about the insulation failure of the faulty component is sent to a terminal device of a maintenance personnel.

[0066] like Figure 3 As shown, after the vehicle is powered on, the vehicle controller determines whether the faulty component affects the driving of the vehicle based on the recorded data. If the faulty component affects the driving of the vehicle, the high-voltage system of the vehicle is not powered on. In addition, the information of the insulation failure of the faulty component can be sent to the terminal device of the maintenance personnel, so as to notify the maintenance personnel to repair the vehicle as soon as possible.

[0067] Step S210: If the faulty component does not affect the driving of the vehicle, the high-voltage system of the vehicle is powered on after the vehicle is powered on next time and the faulty component is not connected to the high-voltage system of the vehicle.

[0068] In some embodiments, if the faulty component does not affect the driving of the vehicle, information indicating that the faulty component has an insulation failure is displayed on the dashboard of the vehicle.

[0069] like Figure 3 As shown, after the vehicle is powered on, the vehicle controller determines whether the faulty component affects the driving of the vehicle based on the recorded data. If the faulty component does not affect the driving of the vehicle, the high-voltage system of the vehicle is powered on, and the faulty component is not connected to the high-voltage system of the vehicle. At this time, the vehicle can continue to drive after sending the insulation fault until it enters the station for maintenance. In addition, the information that the faulty component has an insulation fault can also be displayed on the dashboard of the vehicle, so as to prompt the driver and maintenance personnel to determine the faulty component with insulation fault by checking the above information on the dashboard.

[0070] Therefore, in this embodiment, after an insulation fault occurs in the vehicle, based on the control of the contactor disconnection sequence by the vehicle controller, the components of the high-voltage system are disconnected from the high-voltage circuit one by one until the insulation fault is restored, at which time the faulty component is determined. The faulty component is distinguished according to its function, and if it is not an essential function during the re-powering process, the contactor may not be closed, allowing the vehicle to continue driving until it enters the station for maintenance.

[0071] In this embodiment, the faulty component can be confirmed during the power-off process, the vehicle controller stores the faulty component, and the faulty component name is reported during the vehicle power-on process to achieve accurate fault location. In this embodiment, based on the confirmation of the faulty component during the power-off process and the functional division, the faulty component will not be connected to the high-voltage system during the next power-on process without affecting driving, ensuring that the vehicle can travel normally until it enters the station for maintenance.

[0072] In summary, the embodiments of the present invention mainly provide the following contents: 1. This embodiment can automatically determine the faulty component after an insulation fault occurs in the vehicle, and maintenance personnel no longer need to eliminate the fault one by one. It can also determine whether the faulty component affects the driving of the vehicle. If the faulty component does not affect the driving of the vehicle, the high-voltage system of the vehicle can still be powered on after the vehicle is powered on next time. It only needs to disconnect the faulty component from the high-voltage system of the vehicle, so that the vehicle can continue to drive after sending the insulation fault until it enters the station for maintenance.

[0073] 2. In this embodiment, the detection order of various components of the high-voltage system can be determined by pre-setting the detection priority, thereby ensuring that high-priority components are detected first, thereby improving the safety of insulation fault location.

[0074] 3. In this embodiment, after the contactor of the component is disconnected, the insulation detector based on the high-voltage system of the vehicle detects whether the insulation fault of the vehicle is restored; if the insulation fault of the vehicle is restored, the component is determined to be a faulty component; if the insulation fault of the vehicle is not restored, the component is determined not to be a faulty component, thereby achieving accurate positioning of the faulty component.

[0075] 4. The vehicle controller of the vehicle pre-stores the recorded data of whether each component of the high-voltage system of the vehicle affects the driving of the vehicle after an insulation fault occurs. After the vehicle is powered on, the vehicle controller can determine whether the faulty component affects the driving of the vehicle based on the above recorded data. The vehicle controller can accurately and quickly determine whether the faulty component affects the driving of the vehicle through the above recorded data.

[0076] 5. After the vehicle is powered on, the vehicle controller determines whether the faulty component affects the vehicle's driving based on the recorded data. If the faulty component affects the vehicle's driving, the vehicle's high-voltage system will not be powered on. In addition, the information about the insulation failure of the faulty component can be sent to the maintenance personnel's terminal device, so as to notify the maintenance personnel to repair the vehicle as soon as possible.

[0077] 6. After the vehicle is powered on, the vehicle controller determines whether the faulty component affects the vehicle's driving based on the recorded data. If the faulty component does not affect the vehicle's driving, the vehicle's high-voltage system is powered on, and the faulty component is not connected to the vehicle's high-voltage system. At this time, the vehicle can continue to drive after sending an insulation fault until it enters the station for maintenance. In addition, the information that the faulty component has an insulation fault can also be displayed on the vehicle's dashboard, thereby prompting the driver and maintenance personnel to determine the faulty component with the insulation fault by checking the above information on the dashboard.

[0078] The above method provided by the embodiment of the present invention can quickly locate the faulty part, and no longer requires professional maintenance personnel to check the faulty part through an external insulation tester. The whole vehicle only needs to control the high-voltage contactor through the diagnosis preset program to confirm the faulty part. This shortens the troubleshooting time, and according to the functional distinction of the faulty part, the vehicle can be allowed to limp into the maintenance station for maintenance, thereby reducing the probability of vehicle breakdown.

[0079] Embodiment three: Corresponding to the above embodiment, the embodiment of the present invention provides a vehicle insulation fault location device, see Figure 5 The structure diagram of a vehicle insulation fault locating device is shown, and the vehicle insulation fault locating device comprises: The vehicle power-off control module 51 is used to control the vehicle power-off when an insulation fault occurs in the vehicle; A faulty component detection module 52, used to sequentially disconnect contactors of various components of the high-voltage system of the vehicle, and detect whether a component is a faulty component based on an insulation detector of the high-voltage system of the vehicle; A driving-affecting judgment module 53 is used to determine whether the faulty component affects the driving of the vehicle; A first fault component processing module 54 is used to prevent the high voltage system of the vehicle from being powered on next time the vehicle is powered on if the fault component affects the driving of the vehicle; The second fault component processing module 55 is used to power on the high-voltage system of the vehicle and disconnect the fault component from the high-voltage system of the vehicle when the vehicle is powered on next time if the fault component does not affect the driving of the vehicle.

[0080] The embodiment of the present invention provides a vehicle insulation fault positioning device. When an insulation fault occurs in the vehicle, the vehicle is controlled to be powered off; the contactors of various components of the vehicle's high-voltage system are disconnected in sequence, and the components are detected based on the insulation detector of the vehicle's high-voltage system to see if they are faulty components; it is determined whether the faulty component affects the driving of the vehicle; if the faulty component affects the driving of the vehicle, the high-voltage system of the vehicle is not powered on after the vehicle is powered on next time; if the faulty component does not affect the driving of the vehicle, the high-voltage system of the vehicle is powered on after the vehicle is powered on next time, and the faulty component is not connected to the high-voltage system of the vehicle. In this way, the faulty component can be automatically determined after an insulation fault occurs in the vehicle, and maintenance personnel no longer need to eliminate the faulty components one by one; it can also be determined whether the faulty component affects the driving of the vehicle. If the faulty component does not affect the driving of the vehicle, the high-voltage system of the vehicle can still be powered on after the vehicle is powered on next time, and the faulty component only needs to be disconnected from the high-voltage system of the vehicle, so that the vehicle can continue to drive after sending the insulation fault until it enters the station for maintenance.

[0081] The above-mentioned device also includes: an insulation detector detection module, which is used to detect whether an insulation fault occurs in the vehicle based on an insulation detector of the high-voltage system of the vehicle.

[0082] The above-mentioned fault component detection module is used to pre-set the detection priority of each component of the high-voltage system of the vehicle; and disconnect the contactors of each component of the high-voltage system of the vehicle in sequence based on the detection priority.

[0083] The above-mentioned faulty component detection module is used to detect whether the insulation fault of the vehicle is restored based on the insulation tester of the vehicle's high-voltage system after the contactor of the component is disconnected; if the insulation fault of the vehicle is restored, the component is determined to be a faulty component; if the insulation fault of the vehicle is not restored, the component is determined not to be a faulty component.

[0084] The above device also includes: a faulty component storage module, which is used to store the faulty component in the vehicle controller of the vehicle.

[0085] The vehicle controller of the above-mentioned vehicle pre-stores recorded data on whether various components of the vehicle's high-voltage system affect the vehicle's driving after an insulation failure occurs; the above-mentioned fault component detection module is used for the vehicle controller to determine whether the fault component affects the vehicle's driving based on the recorded data.

[0086] The first faulty component processing module is also used to send information about insulation failure of the faulty component to a terminal device of a maintenance personnel if the faulty component affects the driving of the vehicle.

[0087] The above-mentioned faulty component processing module is also used to display the information of insulation failure of the faulty component on the dashboard of the vehicle if the faulty component does not affect the driving of the vehicle.

[0088] The above-mentioned high-voltage system comprises: a plurality of components, a plurality of contactors and an insulation tester; wherein the components and the contactors correspond one to one.

[0089] The components of the high-pressure system include at least one of the following: a main drive component, an air conditioning component, an air pump component, an oil pump component, a DC / DC conversion component or a defrosting component.

[0090] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the vehicle insulation fault locating device described above can refer to the corresponding process in the aforementioned embodiment of the vehicle insulation fault locating method, and will not be repeated here.

[0091] Embodiment 4: The embodiment of the present invention also provides an electronic device for running the insulation fault location method of the above vehicle; see Figure 6 A structural schematic diagram of an electronic device is shown, the electronic device includes a memory 100 and a processor 101, wherein the memory 100 is used to store one or more computer instructions, and the one or more computer instructions are executed by the processor 101 to implement the above-mentioned vehicle insulation fault locating method.

[0092] Further, Figure 6 The electronic device shown further includes a bus 102 and a communication interface 103 , and the processor 101 , the communication interface 103 and the memory 100 are connected via the bus 102 .

[0093] The memory 100 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 103 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used. The bus 102 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 6 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0094] The processor 101 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 101. The above processor 101 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present invention can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 100, and the processor 101 reads the information in the memory 100 and completes the steps of the method of the above embodiment in combination with its hardware.

[0095] An embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the above-mentioned vehicle insulation fault locating method. The specific implementation can be found in the method embodiment, which will not be repeated here.

[0096] The vehicle insulation fault locating method, device, electronic device and computer program product of the storage medium provided in the embodiments of the present invention include a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method in the previous method embodiment. The specific implementation can be referred to the method embodiment, which will not be repeated here.

[0097] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and / or device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0098] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0099] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0100] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0101] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A method for locating insulation fault of a vehicle, characterized in that: The method comprises: When an insulation fault occurs in a vehicle, the vehicle is controlled to be powered off; Disconnecting contactors of various components of the high-voltage system of the vehicle in sequence, and detecting whether the components are faulty parts based on an insulation tester of the high-voltage system of the vehicle; Determining whether the faulty component affects the driving of the vehicle; If the faulty component affects the driving of the vehicle, the high voltage system of the vehicle will not be powered on after the vehicle is powered on next time; If the faulty component does not affect the driving of the vehicle, the high-voltage system of the vehicle is powered on after the vehicle is powered on next time and the faulty component is not connected to the high-voltage system of the vehicle.

2. The method according to claim 1, characterized in that The method further comprises: An insulation tester based on the high voltage system of the vehicle detects whether an insulation fault occurs in the vehicle.

3. The method according to claim 1, characterized in that The step of sequentially disconnecting the contactors of the various components of the high voltage system of the vehicle comprises: presetting the detection priority of various components of the high-voltage system of the vehicle; Contactors of respective components of the high voltage system of the vehicle are opened sequentially based on the detection priority.

4. The method according to claim 2, characterized in that: The step of detecting whether the component is a faulty component based on an insulation tester of the high-voltage system of the vehicle comprises: After the contactor of the component is disconnected, an insulation detector based on the high voltage system of the vehicle detects whether the insulation fault of the vehicle is restored; If the insulation fault of the vehicle is restored, determining that the component is a faulty component; If the insulation fault of the vehicle is not restored, it is determined that the component is not a faulty component.

5. The method according to claim 1, characterized in that After the step of detecting whether the component is a faulty component based on the insulation tester of the high-voltage system of the vehicle, the method further includes: The faulty component is stored in a vehicle controller of the vehicle.

6. The method according to claim 5, characterized in that The vehicle controller of the vehicle pre-stores record data of whether each component of the high-voltage system of the vehicle affects the driving of the vehicle after an insulation failure occurs; The step of determining whether the faulty component affects the driving of the vehicle comprises: a vehicle controller of the vehicle determines whether the faulty component affects the driving of the vehicle based on the recorded data.

7. The method according to claim 1, characterized in that After the step of determining whether the faulty component affects the driving of the vehicle, the method further includes: If the faulty component affects the driving of the vehicle, information on the insulation failure of the faulty component is sent to a terminal device of a maintenance personnel.

8. The method according to claim 1, characterized in that After the step of determining whether the faulty component affects the driving of the vehicle, the method further includes: If the faulty component does not affect the driving of the vehicle, information indicating that the faulty component has an insulation fault is displayed on the dashboard of the vehicle.

9. The method according to any one of claims 1 to 8, characterized in that: The high voltage system comprises: a plurality of the components, a plurality of the contactors and the insulation detector; wherein the components correspond to the contactors one by one.

10. The method according to claim 9, characterized in that The components of the high-pressure system include at least one of the following: a main drive component, an air conditioning component, an air pump component, an oil pump component, a DC / DC conversion component or a defrosting component.

11. A vehicle insulation fault location device, characterized in that: The device comprises: A vehicle power-off control module, used to control the vehicle to power off when an insulation fault occurs in the vehicle; A faulty component detection module, used to sequentially disconnect contactors of various components of the high-voltage system of the vehicle, and detect whether the component is a faulty component based on an insulation tester of the high-voltage system of the vehicle; A driving impact judgment module, used to determine whether the faulty component affects the driving of the vehicle; A first fault component processing module, configured to prevent the high voltage system of the vehicle from being powered on next time the vehicle is powered on if the fault component affects the driving of the vehicle; The second fault component processing module is used to power on the high-voltage system of the vehicle and disconnect the fault component from the high-voltage system of the vehicle after the vehicle is powered on next time if the fault component does not affect the driving of the vehicle.

12. An electronic device, characterized in that: The invention comprises a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the insulation fault locating method for a vehicle according to any one of claims 1 to 10.

13. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the vehicle insulation fault locating method according to any one of claims 1 to 10.

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