Vehicle insulation fault diagnosis method, device, equipment and storage medium

Abstract

The application discloses a whole vehicle insulation fault diagnosis method, device, equipment and storage medium, and relates to the technical field of vehicle fault diagnosis. The method comprises the following steps: acquiring a real-time insulation resistance and start-stop states of each component in the vehicle; determining a fault component according to the real-time insulation resistance and the start-stop states of each component in the vehicle; and executing a corresponding safety control plan according to the fault component to complete a driving task. According to the method, the insulation resistance and the start-stop states of each component are monitored in real time, the fault component is accurately identified, and the safety control plan is intelligently executed according to the fault type, so that the accuracy and response speed of fault diagnosis are effectively improved, the maintenance time is reduced, the safety and driving experience of the vehicle under the fault condition are ensured, and the secondary safety risk caused by improper fault treatment is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle fault diagnosis, in particular to a vehicle insulation fault diagnosis method, device, equipment and storage medium. BACKGROUND

[0002] With the continuous progress of science and technology and the increasing awareness of environmental protection, new energy vehicles have become an important direction of the development of the automobile industry. However, as a core component of new energy vehicles, the safety of the high-voltage system cannot be ignored. Insulation failure, as a key factor affecting the safety of the high-voltage system, is directly related to the safe operation of the vehicle and the safety of the passengers.

[0003] In the high-voltage system of a new energy vehicle, the insulation performance directly determines the reliability of the electrical system. Insulation failure can cause current leakage, which not only affects the normal operation of the vehicle, but also can cause serious safety accidents such as fires. The diagnosis technology currently available on the market does not perform detailed classification diagnosis on insulation failure, and cannot immediately determine which component in the high-voltage system caused the insulation failure when an insulation failure occurs, which is not conducive to maintenance personnel to locate the faulty parts. Maintenance personnel need to use special diagnostic tools for secondary detection, resulting in long maintenance time, and in addition, there is a situation that the fault is difficult to reproduce, so it will be difficult to determine the component that caused the insulation failure during secondary detection.

[0004] Therefore, how to accurately determine the component that caused the insulation failure when an insulation failure occurs has become a technical problem to be solved in the art. SUMMARY

[0005] The main purpose of the present application is to provide a vehicle insulation fault diagnosis method, device, equipment and storage medium, which aims to solve the technical problem of how to accurately determine the component that caused the insulation failure when an insulation failure occurs.

[0006] To achieve the above-mentioned purpose, the present application provides a vehicle insulation fault diagnosis method, which comprises the following steps:

[0007] Obtaining real-time insulation resistance and start-stop state of each component in the vehicle;

[0008] Determining the fault component according to the real-time insulation resistance and the start-stop state of each component in the vehicle;

[0009] According to the fault component, the corresponding safety control plan is executed to complete the driving task.

[0010] Optionally, the step of determining the fault component according to the real-time insulation resistance and the start-stop state of each component in the vehicle comprises:

[0011] Determining the potential fault component according to the real-time insulation resistance and the start-stop state of each component in the vehicle;

[0012] According to the potential fault component, a periodic start-stop test is performed to obtain an insulation resistance test result;

[0013] According to the insulation resistance test result, a fault component is determined.

[0014] Optionally, the determination of the fault component according to the real-time insulation resistance and the start-stop state of each component in the vehicle comprises:

[0015] According to the start-stop state of each component in the vehicle, an insulation fault judgment threshold is determined.

[0016] According to the real-time insulation resistance and the insulation fault judgment threshold, a potential fault component is determined.

[0017] Optionally, before the determination of the insulation fault judgment threshold according to the start-stop state of each component in the vehicle, the method further comprises:

[0018] A vehicle of the same type as the current vehicle is obtained as a test vehicle;

[0019] Each component in the vehicle is adjusted to a preset start-stop sequence for testing to obtain a test vehicle insulation resistance under the preset start-stop sequence.

[0020] According to the test vehicle insulation resistance under each preset start-stop sequence, an insulation fault judgment threshold is obtained.

[0021] Optionally, the periodic start-stop test performed according to the potential fault component to obtain an insulation resistance test result comprises:

[0022] According to a preset time period, the potential fault component is executed to start and close, and the insulation resistance in multiple start-stop periods is recorded;

[0023] The average value of the insulation resistance of the potential fault component in the on state is taken as a first detection resistance value, and the average value of the insulation resistance of the potential fault component in the off state is taken as a second detection resistance value;

[0024] The first detection resistance value and the second detection resistance value are taken as the insulation resistance test result.

[0025] Optionally, the determination of the fault component according to the insulation resistance test result comprises:

[0026] When the first detection resistance value is less than the insulation fault judgment threshold and the second detection resistance value is greater than the insulation fault judgment threshold, the potential fault component is determined as a fault component.

[0027] Optionally, the execution of the corresponding safety control plan according to the fault component to complete the driving task comprises:

[0028] adjust a driving mode of the vehicle according to the faulty component;

[0029] after the driving mode adjustment is completed, the faulty component is closed, and a travel task is completed according to the current driving mode.

[0030] In addition, to achieve the above object, the present application also provides a whole vehicle insulation fault diagnosis device, which comprises:

[0031] a data acquisition module, configured to acquire real-time insulation resistance and start-stop states of each component in the vehicle;

[0032] a data processing module, configured to determine a faulty component according to the real-time insulation resistance and the start-stop states of each component in the vehicle;

[0033] a control module, configured to execute a corresponding safety control plan according to the faulty component, so as to complete a travel task.

[0034] In addition, to achieve the above object, the present application also provides a whole vehicle insulation fault diagnosis device, which comprises a memory, a processor, and a whole vehicle insulation fault diagnosis program stored in the memory and executable on the processor, and the whole vehicle insulation fault diagnosis program is configured to implement the steps of the whole vehicle insulation fault diagnosis method as described above.

[0035] In addition, to achieve the above object, the present application also provides a storage medium, which stores a whole vehicle insulation fault diagnosis program, and the whole vehicle insulation fault diagnosis program implements the steps of the whole vehicle insulation fault diagnosis method as described above when executed by a processor.

[0036] The present application acquires real-time insulation resistance and start-stop states of each component in the vehicle, determines a faulty component according to the real-time insulation resistance and the start-stop states of each component in the vehicle, and executes a corresponding safety control plan according to the faulty component, so as to complete a travel task.

[0037] As can be seen from the above, the process proposed by the present application can accurately identify a faulty component by real-time monitoring of insulation resistance and start-stop states of components, and intelligently execute a safety control plan according to a fault type, thereby effectively improving the accuracy and response speed of fault diagnosis, reducing maintenance time, and ensuring the safety and driving experience of a vehicle in a fault condition and reducing secondary safety risks caused by improper fault handling. BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0040] Figure 1 The flowchart of the first embodiment of the vehicle insulation fault diagnosis method of the present application is shown in the figure.

[0041] Figure 2 The flowchart of the second embodiment of the vehicle insulation fault diagnosis method of the present application is shown in the figure.

[0042] Figure 3 The functional module diagram of the vehicle insulation fault diagnosis device of the present application is shown in the figure.

[0043] Figure 4 The structure diagram of the terminal device of the hardware running environment involved in the embodiment of the present application is shown in the figure.

[0044] The implementation of the object of the present application, the functional features and the advantages will be further described with reference to the drawings. DETAILED DESCRIPTION

[0045] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application, and are not used to limit the present application.

[0046] In order to better understand the technical solutions of the present application, the following will be described in detail with reference to the drawings of the specification and the specific embodiments.

[0047] It should be noted that the execution subject of the present embodiment can be a computing service device with data processing, network communication and program running functions, such as tablet computer, personal computer, mobile phone, etc., or an electronic device, vehicle insulation fault diagnosis device, etc. capable of realizing the above functions. The present embodiment and each of the following embodiments will be described below taking the vehicle insulation fault diagnosis device as an example.

[0048] The present embodiment provides a vehicle insulation fault diagnosis method, which is described in detail with reference to the drawings of the specification. Figure 1 , Figure 1 The flowchart of the first embodiment of the present application is shown in the figure.

[0049] In the present embodiment, the vehicle insulation fault diagnosis method comprises:

[0050] Step S10: acquiring real-time insulation resistance and starting and stopping state of each component in the vehicle.

[0051] It should be noted that the insulation resistance value herein refers specifically to the insulation resistance value of the entire vehicle, that is, the measurement of the insulation resistance of the entire vehicle electrical system, which is usually the resistance value from the high-voltage electrical system (such as the battery, motor, power electronic converter, etc.) of the vehicle to the chassis or ground of the vehicle. This parameter is the most important indicator for evaluating the insulation performance of the entire vehicle electrical system. The insulation resistance value of the entire vehicle is usually compared with the minimum safety threshold set by the manufacturer. If the measured value is lower than this threshold, it may indicate that there is an insulation defect or failure. Conversely, the larger the real-time insulation resistance value measured, the better the insulation performance of the entire vehicle.

[0052] It can be understood that the components in the vehicle include but are not limited to high-voltage relays, compressors, electronic heaters, drive motors, and high-low voltage conversion devices. In the normal operation of the vehicle, these components are not necessarily turned on at the same time. When the driving mode of the vehicle and the passenger demand are different, the start-stop state of these components will also change accordingly. For example, the function of the compressor is to compress air or refrigerant for the air conditioning system to provide cooling function. When the vehicle has a refrigeration demand, the compressor will be powered on and work. At this time, the start of the compressor has no direct relationship with the driving mode. On the other hand, since the object of the method is a hybrid vehicle, in some scenarios, the drive motor can not work, and the driving force is maintained by relying on the fuel engine, and the power supply in the vehicle only relies on the battery pack. That is, according to different driving modes and passenger demands, the start-stop state of each component in the vehicle forms different combinations.

[0053] It should be understood that when the start-stop state of each component in the vehicle forms a fixed combination, the insulation resistance value should fluctuate within a relatively stable range. That is, the result of the insulation resistance value is essentially predictable. If there is no insulation failure at this time, the insulation resistance value of the vehicle should be deduced according to the current start-stop state of each component. If the actual insulation resistance value is too large or too small, it indicates that there is an insulation failure.

[0054] Step S20: determining the faulty component according to the real-time insulation resistance value and the start-stop state of each component in the vehicle.

[0055] It should be noted that since the number of components in the vehicle that have high-voltage power demand is limited, that is, the combinations corresponding to the start and stop state of each component are limited. At this time, the insulation resistance value of this type of vehicle can be calibrated and tested during the vehicle manufacturing stage, that is, the insulation resistance threshold of all components under the possible start-stop combination can be obtained. It should be emphasized that each start-stop combination should correspond to a unique insulation resistance threshold.

[0056] In an embodiment, before determining the insulation fault determination threshold according to the start-stop state of each component in the vehicle, the method further comprises: obtaining a vehicle of the same type as the current vehicle as a test vehicle; adjusting each component in the vehicle to a preset start-stop sequence for testing to obtain a test vehicle insulation resistance under the preset start-stop sequence; and obtaining the insulation fault determination threshold according to the test vehicle insulation resistance under each preset start-stop sequence.

[0057] It can be understood that the insulation fault determination threshold should be related to a specific component. For example, when the high-voltage relay is disconnected, i.e., only the power battery is in the high-voltage system, the insulation resistance of the power battery under normal circumstances is the insulation fault determination threshold. However, considering errors and different battery performance parameters, the obtained insulation fault determination threshold needs to be further adjusted to adapt to the use of the vehicle. Since the internal resistance of the battery will become larger with the use of time, the insulation fault determination threshold corresponding to the situation that the high-voltage relay is disconnected and only the power battery is in the high-voltage system should be larger than the theoretical value to adapt to the impact of battery aging.

[0058] It should be understood that during the driving of the vehicle, according to the start-stop state of each component in the vehicle, the safety range of the whole vehicle insulation resistance at the current time can be determined. If the real-time insulation resistance falls within this range, it means that the current vehicle has no insulation fault. When the components of the vehicle change during the journey, the new safety range of the whole vehicle insulation resistance should be determined according to the combination formed by the changed start-stop state, and then the insulation resistance at the current time is obtained to determine whether there is an insulation fault. When there is an insulation fault, according to the principle of control variable method, the components are started or closed one by one and the real-time insulation resistance is monitored. If the insulation resistance returns to the safety range, it means that the last component adjusted is the faulty component. Therefore, the faulty component can be locked by this method.

[0059] Step S30: performing a corresponding safety control plan according to the fault component to complete the driving task.

[0060] It should be noted that the above troubleshooting process needs to be combined with the running state of the vehicle, because the start and stop of some components are related to the driving state of the vehicle. For example, when the drive motor may have a fault, if the start-stop test is performed recklessly, it will cause unstable vehicle speed. Therefore, in this case, the vehicle fuel engine needs to be started first and gradually replace the output driving force of the drive motor, and then the drive motor is gradually closed. Through such adaptive testing, the faulty component can be determined more safely.

[0061] In an embodiment, the executing the corresponding safety control plan according to the fault component to complete the driving task comprises: adjusting a driving mode of the vehicle according to the fault component; and after the driving mode is adjusted, shutting down the fault component and completing the driving task according to the current driving mode.

[0062] It can be understood that the safety control plan corresponds to multiple safety modes reserved in the vehicle system. For example, when the current danger level is high due to an uncertain insulation fault reason, the vehicle needs to be powered off and the vehicle operation is prohibited; when the fault component is a compressor, the air conditioner needs to be disabled, the electric compressor remains in a closed state, and other high-pressure components can continue to start; when the fault component is an electronic heater, the heater needs to be disabled, the electronic heater remains in a closed state, and other high-pressure components can continue to start; similarly, when the fault component is determined, the component can be closed correspondingly without affecting normal driving, so as to avoid causing adverse effects.

[0063] The application determines the fault component according to the real-time insulation resistance value and the start-stop state of each component in the vehicle, executes the corresponding safety control plan according to the fault component, and completes the driving task.

[0064] In summary, the vehicle insulation fault diagnosis method proposed in the application significantly improves the accuracy and response speed of fault detection through real-time monitoring and accurate diagnosis, and reduces maintenance time and cost. Secondly, the adaptability test of the scheme ensures the stability of the vehicle and the safety of the passengers during fault diagnosis and processing. Thirdly, through the preset safety control plan, the vehicle can safely operate under various fault conditions, reducing the safety risk caused by faults. Finally, the implementation of the scheme helps to improve the reliability of the hybrid vehicle and the trust of the users, and also provides data support for the health management and predictive maintenance of the vehicle. These beneficial effects collectively promote the maturity and market competitiveness of the hybrid vehicle technology.

[0065] Reference Figure 2 , Figure 2 The flowchart of the second embodiment of the vehicle insulation fault diagnosis method of the application is shown in FIG. 2. Based on the first embodiment, the second embodiment of the vehicle insulation fault diagnosis method of the application is proposed.

[0066] In this embodiment, the step S20 comprises:

[0067] Step S201: determining a potential fault component according to the real-time insulation resistance value and the start-stop state of each component in the vehicle.

[0068] It should be noted that the insulation fault judgment threshold obtained according to different start-stop states in the foregoing step is a one-to-one correspondence, but the insulation fault judgment threshold can only be used as a reference, that is, it can only be used to determine whether an insulation fault exists at present, and it cannot be used to determine which components cause the fault. On the other hand, assuming that the fault is caused by only one component (the simultaneous occurrence of multiple component faults is a small probability event), according to the arrangement combination of the current start-stop state, if only one component start-stop state is changed, the change trend of the insulation resistance after the change should be determined in theory. Specifically, some components may increase the total resistance of the system when they are turned on, thereby possibly increasing the insulation resistance, and some components may have a low internal resistance or a small insulation defect, which may cause the overall insulation resistance to decrease when they are turned on. Therefore, according to the characteristics of each component, some components that are unlikely to cause a fault can be screened out, because these components do not include the current insulation resistance in the range of the insulation resistance of the whole vehicle even if a fault occurs. Therefore, the only components that can cause a fault are other components, and these components that are suspected to cause a fault are potential fault components.

[0069] In an embodiment, the determining of the fault component according to the real-time insulation resistance and the start-stop state of each component in the vehicle comprises: determining an insulation fault judgment threshold according to the start-stop state of each component in the vehicle; and determining a potential fault component according to the real-time insulation resistance and the insulation fault judgment threshold.

[0070] Step S202: performing a periodic start-stop test according to the potential fault component to obtain an insulation resistance test result.

[0071] In an embodiment, the performing of the periodic start-stop test according to the potential fault component to obtain an insulation resistance test result comprises: performing a start and stop operation on the potential fault component according to a preset time period, and recording the insulation resistance in multiple start-stop periods; taking the average value of the insulation resistance of the potential fault component in the on state as a first detection resistance value, and taking the average value of the insulation resistance of the potential fault component in the off state as a second detection resistance value; and taking the first detection resistance value and the second detection resistance value as the insulation resistance test result.

[0072] It can be understood that only one potential fault component is selected for each test, and the start state of other components remains unchanged. The first detection resistance value obtained in the foregoing step corresponds to the average level of the insulation resistance of the potential fault component in the on state, and the second detection resistance value corresponds to the average level of the insulation resistance of the potential fault component in the off state. Then, the two results are looked up respectively, and it can be determined whether the component has a fault.

[0073] It should be understood that there is a certain error in the test result of a single test, so in the actual process, each opening and closing should be maintained for more than 10s, and the insulation resistance value in the opening state and the closing state should be measured at least three times and then averaged.

[0074] Step S203: determining a fault component according to the insulation resistance test result.

[0075] In an embodiment, the determining a fault component according to the insulation resistance test result comprises: when the first detection resistance value is less than an insulation fault judgment threshold and the second detection resistance value is greater than the insulation fault judgment threshold, judging that the potential fault component is a fault component.

[0076] The embodiment provides a vehicle insulation fault diagnosis method. The embodiment first determines a potential fault component according to the real-time insulation resistance value and the start-stop state of each component in the vehicle; performs periodic start-stop tests according to the potential fault component to obtain an insulation resistance test result; and determines a fault component according to the insulation resistance test result.

[0077] As can be seen, by monitoring the insulation resistance value of the vehicle and the start-stop state of each component in the vehicle in real time, and in combination with a preset fault judgment threshold, a possible fault component can be identified and located, and then periodic start-stop tests are performed on the components that are likely to have faults under the condition of safe driving, and insulation resistance values in different states are recorded and analyzed. By comparing the average insulation resistance values in the opening state and the closing state in combination with the fault judgment threshold, a fault component can be judged and determined. This method considers the test error, requires a certain time for each test, and performs multiple measurements to take an average value to improve accuracy.

[0078] Reference Figure 3 The application also provides a vehicle insulation fault diagnosis device, which comprises:

[0079] A data acquisition module 10 is configured to acquire a real-time insulation resistance value and a start-stop state of each component in the vehicle.

[0080] A data processing module 20 is configured to determine a fault component according to the real-time insulation resistance value and the start-stop state of each component in the vehicle.

[0081] A control module 30 is configured to execute a corresponding safety control plan according to the fault component to complete a driving task.

[0082] In an embodiment, the data processing module 20 is further configured to determine a potential fault component according to the real-time insulation resistance value and the start-stop state of each component in the vehicle; perform periodic start-stop tests according to the potential fault component to obtain an insulation resistance test result; and determine a fault component according to the insulation resistance test result.

[0083] In an embodiment, the data processing module 20 is further configured to determine an insulation fault determination threshold according to the start-stop state of each component in the vehicle; and determine the potential fault component according to the real-time insulation resistance and the insulation fault determination threshold.

[0084] In an embodiment, the data processing module 20 is further configured to obtain a vehicle of the same type as the current vehicle as a test vehicle; adjust each component in the vehicle to a preset start-stop sequence for testing to obtain a test vehicle insulation resistance under the preset start-stop sequence; and obtain an insulation fault determination threshold according to the test vehicle insulation resistance under each preset start-stop sequence.

[0085] In an embodiment, the data processing module 20 is further configured to perform start and stop operations on the potential fault component according to a preset time period, and record the insulation resistance in multiple start-stop periods; take the average of the insulation resistance of the potential fault component in the on state as a first detection resistance, and take the average of the insulation resistance of the potential fault component in the off state as a second detection resistance; and take the first detection resistance and the second detection resistance as an insulation resistance test result.

[0086] In an embodiment, the data processing module 20 is further configured to determine that the potential fault component is a fault component when the first detection resistance is less than the insulation fault determination threshold and the second detection resistance is greater than the insulation fault determination threshold.

[0087] In an embodiment, the control module 30 is further configured to adjust the driving mode of the vehicle according to the fault component; and turn off the fault component after the driving mode is adjusted, and complete a driving task according to the current driving mode.

[0088] The embodiments of the present application also provide a vehicle insulation fault diagnosis device, which comprises at least one processor and a memory in communication connection with the at least one processor; the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the vehicle insulation fault diagnosis method in the above-mentioned embodiment one.

[0089] The following will be described with reference to the drawings Figure 4The diagram illustrates a structural schematic suitable for implementing the vehicle insulation fault diagnosis device of the embodiments of this application. The vehicle insulation fault diagnosis device in the embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 4 The vehicle insulation fault diagnosis device shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of this application.

[0090] like Figure 4 As shown, the vehicle insulation fault diagnosis device may include a processing unit 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the vehicle insulation fault diagnosis device. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. Communication device 1009 allows the vehicle insulation fault diagnosis equipment to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows a vehicle insulation fault diagnosis equipment with various systems, it should be understood that implementation or possession of all the systems shown is not required. More or fewer systems may be implemented alternatively.

[0091] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program code for executing the method shown in the flowchart. In such embodiments, the computer program can be downloaded and installed from a network through a communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiments disclosed in the present application are executed.

[0092] The vehicle insulation fault diagnosis device provided by the present application adopts the vehicle insulation fault diagnosis method in the above embodiments, and can solve the technical problem of how to accurately determine the component causing the insulation fault when the insulation fault occurs in the field. Compared with the prior art, the vehicle insulation fault diagnosis device provided by the present application has the same beneficial effects as the vehicle insulation fault diagnosis method provided by the above embodiments, and other technical features in the vehicle insulation fault diagnosis device are the same as the features disclosed in the previous embodiment method, which will not be repeated here.

[0093] It should be understood that various parts of the present application can be realized by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0094] The above is merely specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0095] The present application also provides a storage medium, which stores a vehicle insulation fault diagnosis program, and the vehicle insulation fault diagnosis program realizes the steps of the vehicle insulation fault diagnosis method according to any one of the above embodiments when executed by a processor.

[0096] The storage medium provided in the present application may, for example, be a U disk, but is not limited to an electric, magnetic, optical, electromagnetic, infrared, or semiconductor system, system, or device, or any combination of the above. More specific examples of the storage medium may include, but are not limited to, an electric connection with one or more conductive wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present embodiment, the storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the storage medium can be transmitted by any suitable medium, including but not limited to an electric wire, an optical cable, an RF (Radio Frequency), and the like, or any suitable combination of the above.

[0097] The above-mentioned storage medium may be contained in the vehicle insulation fault diagnosis device, or may exist separately without being assembled into the vehicle insulation fault diagnosis device.

[0098] The above-mentioned computer-readable storage medium carries one or more programs, which, when executed by the vehicle insulation fault diagnosis device, cause the vehicle insulation fault diagnosis device to: acquire a real-time insulation resistance value and a start-stop state of each component in the vehicle; determine a faulty component according to the real-time insulation resistance value and the start-stop state of each component in the vehicle; and execute a corresponding safety control plan according to the faulty component to complete a driving task.

[0099] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0100] The flow diagrams and the block diagrams in the drawings are illustrations of architectures, functionalities, and operations of possible implementations of systems, methods, and computer program products according to various embodiments of the present application. In this regard, each block in the flow diagrams or block diagrams can represent a module, a segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or the blocks may

[0101] The modules involved in the embodiments of the present application can be implemented in the form of software or in the form of hardware. In some cases, the name of the module does not constitute a limitation on the module itself.

[0102] The storage medium provided by the present application is a computer readable storage medium, which stores computer readable program instructions (i.e., computer programs) for executing the whole vehicle insulation fault diagnosis method described above, and can solve the technical problem of how to accurately determine the component causing the insulation fault when the insulation fault occurs. Compared with the prior art, the computer readable storage medium provided by the present application has the same beneficial effects as the whole vehicle insulation fault diagnosis method provided by the above-mentioned embodiments, and will not be described here.

[0103] The above merely describes some embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like, which is made based on the technical concept of the present application and the content of the specification and drawings, is included in the patent protection scope of the present application.

Claims

1. A method for diagnosing insulation faults in a vehicle, characterized in that, The vehicle insulation fault diagnosis method includes: Acquire real-time insulation resistance values ​​and the start / stop status of various components inside the vehicle; The faulty component is determined based on the real-time insulation resistance value and the start / stop status of each component in the vehicle. The step of determining the faulty component based on the real-time insulation resistance value and the start / stop status of various components inside the vehicle includes: Based on the real-time insulation resistance value and the start / stop status of each component in the vehicle, potential faulty components are identified; Based on the potentially faulty components, perform periodic start-stop tests to obtain insulation resistance test results; Based on the insulation resistance test results, the faulty component was identified; The step of determining the faulty component based on the real-time insulation resistance value and the start / stop status of various components inside the vehicle includes: Based on the start-stop status of each component inside the vehicle, the threshold for judging insulation faults is determined; Based on the real-time insulation resistance value and the insulation fault judgment threshold, potential faulty components are identified; Before determining the insulation fault judgment threshold based on the start-stop status of each component inside the vehicle, the method further includes: Obtain a vehicle of the same type as the current vehicle as the test vehicle; The various components inside the vehicle are adjusted to a preset start-stop sequence for testing, and the insulation resistance value of the test vehicle under the preset start-stop sequence is obtained. Based on the insulation resistance values ​​of the test vehicles under each preset start-stop sequence, the insulation fault judgment threshold is obtained; Based on the faulty component, the corresponding safety control plan is executed to complete the driving task.

2. The method for diagnosing vehicle insulation faults according to claim 1, characterized in that, The step of performing periodic start-stop tests based on the potentially faulty components to obtain insulation resistance test results includes: Perform start-up and shutdown operations on the potentially faulty components according to a preset time cycle, and record the insulation resistance value during multiple start-up and shutdown cycles; The average insulation resistance of the potentially faulty component in the on state is used as the first detection resistance value, and the average insulation resistance of the potentially faulty component in the off state is used as the second detection resistance value. The first and second detected resistance values ​​are used as the insulation resistance test results.

3. The method for diagnosing vehicle insulation faults according to claim 2, characterized in that, The step of determining the faulty component based on the insulation resistance test results includes: When the first detection resistance is less than the insulation fault judgment threshold and the second detection resistance is greater than the insulation fault judgment threshold, the potential faulty component is determined to be a faulty component.

4. The method for diagnosing vehicle insulation faults according to claim 1, characterized in that, The step of executing the corresponding safety control plan based on the faulty component to complete the driving task includes: Adjust the vehicle's drive mode according to the faulty component; After the drive mode adjustment is completed, the faulty component is turned off, and the driving task is completed according to the current drive mode.

5. A vehicle insulation fault diagnosis device, characterized in that, The vehicle insulation fault diagnosis device includes: The data acquisition module is used to obtain real-time insulation resistance values ​​and the start / stop status of various components inside the vehicle; The data processing module is used to determine the faulty component based on the real-time insulation resistance value and the start / stop status of each component in the vehicle. The data processing module is further configured to: determine potential faulty components based on the real-time insulation resistance value and the start / stop status of each component in the vehicle; perform periodic start / stop tests based on the potential faulty components to obtain insulation resistance test results; and determine the faulty components based on the insulation resistance test results. The data processing module is also used to determine the insulation fault judgment threshold based on the start-stop status of each component in the vehicle; and to determine potential faulty components based on the real-time insulation resistance value and the insulation fault judgment threshold. The data processing module is also used to acquire vehicles of the same type as the current vehicle as test vehicles; adjust the components inside the vehicle to a preset start-stop sequence for testing, and obtain the insulation resistance value of the test vehicle under the preset start-stop sequence; and obtain the insulation fault judgment threshold based on the insulation resistance value of the test vehicle under each preset start-stop sequence. The control module is used to execute the corresponding safety control plan based on the faulty component in order to complete the driving task.

6. A vehicle insulation fault diagnosis device, characterized in that, The vehicle insulation fault diagnosis device includes: a memory, a processor, and a vehicle insulation fault diagnosis program stored in the memory and executable on the processor, wherein the vehicle insulation fault diagnosis program is configured to implement the steps of the vehicle insulation fault diagnosis method as described in any one of claims 1 to 4.

7. A storage medium, characterized in that, The storage medium stores a vehicle insulation fault diagnosis program, which, when executed by a processor, implements the steps of the vehicle insulation fault diagnosis method as described in any one of claims 1 to 4.

Images