High-voltage electronic device fault detection method, device, medium and vehicle

Abstract

The present disclosure relates to a high-voltage electronic device fault detection method, device, medium and vehicle. The method comprises: obtaining an initial temperature of a target high-voltage electronic device and an actual temperature rise of the target high-voltage electronic device in a preset state of charge range of a battery when the vehicle is charging, wherein the target high-voltage electronic device is located in a high-voltage loop where the battery is located; determining a theoretical temperature rise of the target high-voltage electronic device in the preset state of charge range based on a preset relationship, wherein the preset relationship represents the temperature of the target high-voltage electronic device at different initial temperatures and state of charge of the battery; and determining that the target high-voltage electronic device has a fault when the actual temperature rise is greater than the theoretical temperature rise and the difference between the actual temperature rise and the theoretical temperature rise is greater than a temperature difference warning threshold of the target high-voltage electronic device. The technical scheme of the present disclosure can improve the safety of the vehicle.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, specifically to a method, apparatus, medium, and vehicle for detecting faults in high-voltage electronic devices. Background Technology

[0002] High-voltage batteries are an essential component for powering electric or hybrid vehicles. In order to enable the high-voltage battery to supply high-voltage power to vehicle loads (such as motors) and to provide overcurrent protection for the high-voltage circuit of the high-voltage battery, the high-voltage circuit of the high-voltage battery is equipped with essential high-voltage electronic devices such as main positive relays, main negative relays, and fuses for each branch circuit.

[0003] High-voltage electronic components can be damaged after repeated high-current surges, rendering them ineffective in high-voltage circuits and reducing vehicle safety. For example, relays can suffer internal structural damage after multiple high-current surges, causing them to stick together in emergencies such as motor failures or short circuits resulting from vehicle collisions, failing to disconnect the main circuit and creating a safety hazard. Similarly, fuses can suffer internal diameter damage after multiple high-current surges, leading to abnormal melting during vehicle acceleration and potentially causing rear-end collisions or other malfunctions. Currently, battery management systems only detect relay sticking status through voltage acquisition circuits when the vehicle is powered on, failing to identify all faulty high-voltage electronic components in advance. This prevents users from timely replacement or repair of faulty high-voltage electronic components, impacting their travel. Summary of the Invention

[0004] To address the aforementioned technical problems, this disclosure provides a method, apparatus, medium, and vehicle for detecting faults in high-voltage electronic devices, thereby improving vehicle safety.

[0005] This disclosure provides a fault detection method for high-voltage electronic devices, including:

[0006] During vehicle charging, the initial temperature of the target high-voltage electronic device and the actual temperature rise of the target high-voltage electronic device within the preset state of charge range of the battery are obtained, wherein the target high-voltage electronic device is located in the high-voltage circuit of the battery.

[0007] Based on a preset relationship, the theoretical temperature rise of the target high-voltage electronic device is determined within the preset state of charge range, wherein the preset relationship characterizes the temperature of the target high-voltage electronic device at different initial temperatures and battery states of charge.

[0008] When the actual temperature rise is greater than the theoretical temperature rise and the difference between the actual temperature rise and the theoretical temperature rise is greater than the temperature difference warning threshold of the target high-voltage electronic device, it is determined that the target high-voltage electronic device has a fault.

[0009] In this disclosure, determining the theoretical temperature rise of the target high-voltage electronic device within the preset state of charge range of the battery based on a preset relationship includes:

[0010] Based on the preset relationship, find the first temperature corresponding to the lower limit of the preset state of charge range and the second temperature corresponding to the upper limit of the preset state of charge range at the initial temperature;

[0011] The difference between the second temperature and the first temperature is taken as the theoretical temperature rise.

[0012] In this disclosure, after determining that the target high-voltage electronic device has a fault, the method further includes:

[0013] Obtain the vehicle owner's user identifier, the device information of the target high-voltage electronic device, and the fault information of the target high-voltage electronic device;

[0014] The system sends a fault warning message for the target high-voltage electronic device to the user corresponding to the user identifier. The fault warning message includes the device information and the fault information.

[0015] In this disclosure, after sending the fault warning information of the target high-voltage electronic device to the user corresponding to the user identifier, the method further includes:

[0016] In response to the fault clearing operation of the target high-voltage electronic device, the initial temperature, the actual temperature rise, and the theoretical temperature rise are reset to zero.

[0017] In this disclosure, after sending the fault warning information of the target high-voltage electronic device to the user corresponding to the user identifier, the method further includes:

[0018] If no fault clearance operation of the target high-voltage electronic device is detected within a preset time after the fault warning information of the target high-voltage electronic device is sent to the user, the fault warning information of the target high-voltage electronic device will be sent to the user again.

[0019] In this disclosure, sending fault warning information of the target high-voltage electronic device to the user corresponding to the user identifier includes:

[0020] The user identifier and the fault warning information of the target high-voltage electronic device are reported to the cloud platform, so that the cloud platform can push the fault warning information to the user's mobile terminal based on the user identifier.

[0021] In this disclosure, a temperature detection unit is provided at the target high-voltage electronic device, and the method further includes:

[0022] In response to a vehicle charging request, the temperature detection unit is activated;

[0023] And / or, when the state of charge of the battery exceeds the preset state of charge range, the temperature detection unit is turned off.

[0024] This disclosure provides a fault detection device for high-voltage electronic devices, comprising:

[0025] A temperature acquisition module is used to acquire the initial temperature of a target high-voltage electronic device and the actual temperature rise of the target high-voltage electronic device within a preset state of charge range of the battery during vehicle charging, wherein the target high-voltage electronic device is located in the high-voltage circuit of the battery.

[0026] The theoretical temperature rise determination module is used to determine the theoretical temperature rise of the target high-voltage electronic device within the preset state of charge range based on a preset relationship, wherein the preset relationship characterizes the temperature of the target high-voltage electronic device at different initial temperatures and battery states of charge.

[0027] The fault detection module is used to determine that the target high-voltage electronic device is faulty when the actual temperature rise is greater than the theoretical temperature rise and the difference between the actual temperature rise and the theoretical temperature rise is greater than the temperature difference warning threshold of the target high-voltage electronic device.

[0028] This disclosure also provides a computer-readable storage medium that stores a program or instructions that cause a computer to perform the steps of any of the above methods.

[0029] This disclosure also provides a vehicle, including:

[0030] One or more processors;

[0031] Memory, used to store one or more programs or instructions;

[0032] The processor executes the steps of any of the above methods by calling programs or instructions stored in the memory.

[0033] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0034] The technical solution provided in this disclosure acquires the actual and theoretical temperature rise of the target high-voltage electronic device within a preset state of charge range of the battery during vehicle charging. Since the internal resistance of the high-voltage electronic device increases when it malfunctions, the temperature rise of the device within the same state of charge range also increases due to this increased internal resistance. Therefore, by setting a temperature difference warning threshold for the target high-voltage electronic device, when the actual temperature rise exceeds the theoretical temperature rise and the difference between the actual and theoretical temperature rises exceeds the temperature difference warning threshold, it indicates that the internal resistance of the target high-voltage electronic device has increased to the point of malfunction. Thus, this technical solution, during vehicle charging, can determine if a target high-voltage electronic device is faulty based on the actual temperature rise exceeding the theoretical temperature rise and the difference between the actual and theoretical temperature rises exceeding the temperature difference warning threshold. This allows for early identification of all faulty high-voltage electronic devices, reminding users to replace or repair them promptly, improving vehicle safety and ensuring safe travel for users. Simultaneously, the health status of the high-voltage electronic device can be monitored during each charging cycle, ensuring safe and effective operation of the vehicle throughout its entire lifecycle. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0036] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A flowchart of a fault detection method for high-voltage electronic devices provided in this disclosure embodiment;

[0038] Figure 2 This is a structural block diagram of a high-voltage electronic device fault detection device provided in an embodiment of the present disclosure;

[0039] Figure 3 This is a schematic diagram of the vehicle structure provided in an embodiment of this disclosure. Detailed Implementation

[0040] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0041] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0042] Figure 1 This is a flowchart illustrating a high-voltage electronic device fault detection method provided in an embodiment of this disclosure. This method is applicable to fault detection of electronic devices in high-voltage circuits during the charging of electric vehicles and / or hybrid vehicles. This method can be executed by a high-voltage electronic device fault detection device, which can be implemented in software and / or hardware and can be configured within a battery management system. Figure 1 As shown, the method includes the following steps:

[0043] S110. During vehicle charging, obtain the initial temperature of the target high-voltage electronic device and the actual temperature rise of the target high-voltage electronic device within the preset state of charge range of the battery.

[0044] The target high-voltage electronic device is located in the high-voltage circuit of the battery. The target high-voltage electronic device may include one or more high-voltage electronic devices, and the initial temperature and actual temperature rise of each high-voltage electronic device can be obtained by the battery management system. Specifically, the target high-voltage electronic device may include at least one of a relay, a fuse, and a shunt.

[0045] In one example, a temperature detection unit, such as a temperature sensor, is installed at the target high-voltage electronic device. When the vehicle is charging, the temperature detection unit collects the temperature data of the target high-voltage electronic device in real time and transmits the temperature data to the battery management system. Based on the temperature data at the start of charging, the battery management system determines the initial temperature of the target high-voltage electronic device. Based on the temperature data of the target high-voltage electronic device when the battery reaches the lower limit of the preset state of charge range and the temperature data of the target high-voltage electronic device when the battery reaches the upper limit of the preset state of charge range, the battery management system determines the actual temperature rise of the target high-voltage electronic device (the difference between the corresponding values ​​of the two temperature data).

[0046] It should be noted that the target high-voltage electronic devices involved in the fault detection method for high-voltage electronic devices disclosed in this invention are all high-voltage electronic devices in use. Furthermore, this disclosure does not limit the selection of the preset state of charge range, as long as the temperature change of the target high-voltage electronic device can be detected. Optionally, the preset state of charge range is 20% to 80% to meet the charging needs of most vehicles.

[0047] S120. Based on the preset relationship, determine the theoretical temperature rise of the target high-voltage electronic device within the preset state of charge range.

[0048] The preset relationship characterizes the temperature of the target high-voltage electronic device under different initial temperatures (i.e., ambient temperatures) and battery state of charge. This preset relationship can be obtained by conducting charging experiments on the faulty high-voltage electronic device at different initial temperatures, or it can be provided by the supplier of the high-voltage electronic device. Optionally, this preset relationship can be stored in the form of a relationship table.

[0049] In some embodiments, determining the theoretical temperature rise of the target high-voltage electronic device within a preset state of charge range of the battery based on a preset relationship includes: finding a first temperature corresponding to the lower limit of the preset state of charge range and a second temperature corresponding to the upper limit of the preset state of charge range at an initial temperature based on the preset relationship; and using the difference between the second temperature and the first temperature as the theoretical temperature rise.

[0050] S130. When the actual temperature rise is greater than the theoretical temperature rise and the difference between the actual temperature rise and the theoretical temperature rise is greater than the temperature difference warning threshold of the target high-voltage electronic device, it is determined that the target high-voltage electronic device has a fault.

[0051] The temperature difference warning threshold is the minimum temperature difference that indicates a fault in the target high-voltage electronic device. It can be set according to the target high-voltage electronic device and the preset state of charge range. The temperature difference warning threshold may vary depending on the target high-voltage electronic device and / or the preset state of charge range. The theoretical temperature rise can be considered as the actual temperature rise of a normal target high-voltage electronic device.

[0052] Because the internal resistance of the target high-voltage electronic device increases when it malfunctions, the actual temperature rise of the faulty device will be higher within the same preset state of charge range during vehicle charging. Therefore, the actual temperature rise of the target high-voltage electronic device is compared with its theoretical temperature rise. If the actual temperature rise is greater than the theoretical temperature rise, and the difference between the two exceeds the temperature difference warning threshold of the target high-voltage electronic device, a fault in the target high-voltage electronic device can be determined. Clearly, when the actual temperature rise is less than or equal to the theoretical temperature rise, the technical solution disclosed herein determines that the target high-voltage electronic device is not faulty.

[0053] The high-voltage electronic device fault detection method provided in this embodiment acquires the actual temperature rise and theoretical temperature rise of the target high-voltage electronic device within a preset state of charge range of the battery during vehicle charging. Since the internal resistance of the high-voltage electronic device increases when a fault occurs, the temperature rise of the high-voltage electronic device will be higher within the same state of charge range of the battery due to the increased internal resistance. Therefore, by setting a temperature difference warning threshold for the target high-voltage electronic device, when the actual temperature rise is greater than the theoretical temperature rise and the difference between the actual temperature rise and the theoretical temperature rise is greater than the temperature difference warning threshold for the target high-voltage electronic device, it indicates that the internal resistance of the target high-voltage electronic device has increased to the extent of a fault. Therefore, during the vehicle charging phase, this disclosed technical solution can determine that the target high-voltage electronic device is faulty based on the fact that the actual temperature rise is greater than the theoretical temperature rise and the difference between the actual and theoretical temperature rises is greater than the temperature difference warning threshold of the target high-voltage electronic device. This allows for the early identification of all faulty high-voltage electronic devices, thereby reminding users to replace or repair faulty high-voltage electronic devices in a timely manner, improving vehicle safety and ensuring safe travel for users. At the same time, the health status of the high-voltage electronic devices can be detected in each charging cycle, thus ensuring that the vehicle can operate safely and effectively throughout its entire life cycle.

[0054] In some embodiments, after determining that a target high-voltage electronic device is faulty, the method further includes: obtaining the vehicle owner's user identifier, the device information of the target high-voltage electronic device, and the fault information of the target high-voltage electronic device; and sending a fault warning message for the target high-voltage electronic device to the user corresponding to the user identifier. The fault warning message includes the device information and the fault information. This allows for timely reminders to the user to repair or replace the faulty high-voltage electronic device, thus avoiding safety hazards caused by the faulty device. The user identifier may include the communication number of the user's bound mobile terminal, such as a mobile phone number; the device information may include the name, model, and system of the target high-voltage electronic device; and the fault information may include characters such as device fault or abnormal temperature rise, used to directly or indirectly indicate that the target high-voltage electronic device is faulty. Specifically, sending the fault warning message for the target high-voltage electronic device to the user includes: reporting the user identifier and the fault warning message for the target high-voltage electronic device to a cloud platform, so that the cloud platform can push the fault warning message to the user's mobile terminal based on the user identifier. For example, the vehicle's battery management system reports the communication number of the user's bound mobile terminal and the fault warning information of the target high-voltage electronic device to the cloud platform. The cloud platform then sends the fault warning information to the user's mobile terminal via SMS based on the mobile terminal's communication number.

[0055] In some embodiments, after sending a fault warning message for the target high-voltage electronic device to the user, the method further includes: in response to a fault clearance operation of the target high-voltage electronic device, resetting the initial temperature, actual temperature rise, and theoretical temperature rise to zero. The fault clearance operation may include a confirmation operation confirming that the target high-voltage electronic device has been replaced, or a confirmation operation confirming that the target high-voltage electronic device has been repaired, or a fault alert closure operation. After the fault of the target high-voltage electronic device is cleared, the previously acquired initial temperature, actual temperature rise, and theoretical temperature rise are reset to zero to release storage space.

[0056] In some embodiments, after sending a fault warning message for the target high-voltage electronic device to the user, the method further includes: if no fault clearance operation of the target high-voltage electronic device is detected within a preset time after sending the fault warning message to the user, then sending the fault warning message for the target high-voltage electronic device to the user again. In this embodiment, to ensure that the user receives the fault warning message, the fault warning message will be sent to the user again if the user does not respond to the fault warning message within the preset time. The preset time is set based on a frequency that will not disturb the user, such as half an hour or one hour.

[0057] In some embodiments, a temperature detection unit is provided at the target high-voltage electronic device, and the method further includes: waking up the temperature detection unit in response to a vehicle charging request; and / or, turning off the temperature detection unit when the battery's state of charge exceeds a preset state of charge range. In this embodiment, the temperature detection unit is only woken up when charging begins, and / or turned off when the battery's state of charge exceeds the preset state of charge range, thereby saving power consumption of the temperature detection unit.

[0058] Corresponding to the high-voltage electronic device fault detection method provided in the embodiments of this disclosure, the embodiments of this disclosure also provide a high-voltage electronic device fault detection device. Figure 2 This is a structural block diagram of the high-voltage electronic device fault detection device provided in the embodiments of this disclosure, such as... Figure 2 As shown, the high-voltage electronic device fault detection device includes:

[0059] Temperature acquisition module 21 is used to acquire the initial temperature of the target high-voltage electronic device and the actual temperature rise of the target high-voltage electronic device within the preset state of charge range of the battery when the vehicle is charging, wherein the target high-voltage electronic device is located in the high-voltage circuit of the battery.

[0060] The theoretical temperature rise determination module 22 is used to determine the theoretical temperature rise of the target high-voltage electronic device within a preset state of charge range based on a preset relationship, wherein the preset relationship characterizes the temperature of the target high-voltage electronic device at different initial temperatures and battery state of charge.

[0061] The fault detection module 23 is used to determine that there is a fault in the target high-voltage electronic device when the actual temperature rise is greater than the theoretical temperature rise and the difference between the actual temperature rise and the theoretical temperature rise is greater than the temperature difference warning threshold of the target high-voltage electronic device.

[0062] In some embodiments, the theoretical temperature rise determination module 22 is specifically used for:

[0063] Based on a preset relationship, find the first temperature corresponding to the lower limit of the preset state of charge range and the second temperature corresponding to the upper limit of the preset state of charge range at the initial temperature.

[0064] The difference between the second temperature and the first temperature is taken as the theoretical temperature rise.

[0065] In some embodiments, the apparatus further includes a fault warning information sending module, used for:

[0066] After determining that the target high-voltage electronic device is faulty, a fault warning message for the target high-voltage electronic device is sent to the user.

[0067] In some embodiments, the apparatus further includes a data clearing module for:

[0068] After sending a fault warning message to the user for the target high-voltage electronic device, in response to the fault clearance operation of the target high-voltage electronic device, the initial temperature, actual temperature rise, and theoretical temperature rise are reset to zero.

[0069] In some embodiments, the fault warning information sending module is further configured to:

[0070] After sending a fault warning message for the target high-voltage electronic device to the user, if no fault clearance operation for the target high-voltage electronic device is detected within a preset time after sending the fault warning message to the user, the fault warning message for the target high-voltage electronic device will be sent to the user again.

[0071] In some embodiments, the fault warning information sending module is specifically used for:

[0072] The fault warning information of the target high-voltage electronic device is reported to the cloud platform so that the cloud platform can push the fault warning information to the user's mobile terminal.

[0073] In some embodiments, a temperature detection unit is provided at the target high-voltage electronic device, and the device further includes a temperature detection unit control module for:

[0074] In response to a vehicle charging request, the temperature detection unit is activated;

[0075] And / or, when the battery's state of charge exceeds a preset state of charge range, the temperature detection unit is turned off.

[0076] The high-voltage electronic device fault detection device disclosed in the above embodiments can perform the high-voltage electronic device fault detection methods disclosed in the above embodiments and has the same or corresponding beneficial effects. To avoid repetition, it will not be described again here.

[0077] This disclosure also provides a computer-readable storage medium that stores a program or instructions that cause a computer to perform the steps of any of the above methods.

[0078] For example, a program or instructions cause a computer to execute a method for detecting faults in high-voltage electronic devices, the method comprising:

[0079] During vehicle charging, the initial temperature of the target high-voltage electronic device and the actual temperature rise of the target high-voltage electronic device within the preset state of charge range of the battery are obtained, wherein the target high-voltage electronic device is located in the high-voltage circuit of the battery.

[0080] Based on the preset relationship, the theoretical temperature rise of the target high-voltage electronic device within the preset state of charge range is determined. The preset relationship characterizes the temperature of the target high-voltage electronic device at different initial temperatures and battery states of charge.

[0081] When the actual temperature rise is greater than the theoretical temperature rise and the difference between the actual and theoretical temperature rise is greater than the temperature difference warning threshold of the target high-voltage electronic device, it is determined that the target high-voltage electronic device is faulty.

[0082] Optionally, when executed by a computer processor, the computer-executable instructions can also be used to execute the technical solutions of any of the high-voltage electronic device fault detection methods provided in the embodiments of this disclosure, so as to achieve the corresponding beneficial effects.

[0083] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the embodiments of this disclosure can be implemented using software and necessary general-purpose hardware, and of course, they can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solutions of the embodiments of this disclosure, in essence, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments of this disclosure.

[0084] This disclosure also provides a vehicle, including: one or more processors; a memory for storing one or more programs or instructions; the processors execute the steps of any of the above methods by calling the programs or instructions stored in the memory, thereby achieving the corresponding beneficial effects.

[0085] Figure 3 This is a schematic diagram of the hardware structure of a vehicle provided in an embodiment of this disclosure. (As shown...) Figure 3 As shown, the vehicle includes one or more processors 301 and memory 302.

[0086] The processor 301 may be a central processing unit (CPU) or other form of processing unit with data processing and / or instruction execution capabilities, and may control other components in the vehicle to perform desired functions.

[0087] The memory 302 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 301 may execute the program instructions to implement the high-voltage electronic device fault detection method of the embodiments of this disclosure described above, and / or other desired functions. Various contents such as input signals, signal components, and noise components may also be stored in the computer-readable storage medium.

[0088] In one example, the vehicle may also include an input device 303 and an output device 304, which are interconnected via a bus system and / or other forms of connection mechanism (not shown).

[0089] In addition, the input device 303 may also include, for example, a keyboard, a mouse, etc.

[0090] The output device 304 can output various information to the outside, including determined distance information, direction information, etc. The output device 304 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0091] Of course, for the sake of simplicity, Figure 3 Only some of the components in the vehicle relevant to this disclosure are shown, omitting components such as buses, input / output interfaces, etc. In addition, the vehicle may include any other suitable components depending on the specific application.

[0092] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0093] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of detecting a failure of a high voltage electronic device, characterized by, The method comprises the following steps: obtaining an initial temperature of a target high-voltage electronic device and an actual temperature rise of the target high-voltage electronic device in a preset state-of-charge range of a battery when the vehicle is charging, wherein the target high-voltage electronic device is located in a high-voltage loop in which the battery is located; determining a theoretical temperature rise of the target high-voltage electronic device in the preset state-of-charge range based on a preset relationship, wherein the preset relationship represents the temperature of the target high-voltage electronic device at different initial temperatures and state-of-charge of the battery; determining that the target high-voltage electronic device has a fault when the actual temperature rise is greater than the theoretical temperature rise and the difference between the actual temperature rise and the theoretical temperature rise is greater than a temperature difference warning threshold of the target high-voltage electronic device; The method further comprises the following steps: obtaining a user identifier of a vehicle owner, device information of the target high-voltage electronic device, and fault information of the target high-voltage electronic device; sending fault warning information of the target high-voltage electronic device to a user corresponding to the user identifier, wherein the fault warning information comprises the device information and the fault information.

2. The method of claim 1, wherein, The method further comprises the following steps: in response to a fault removal operation of the target high-voltage electronic device, clearing the initial temperature, the actual temperature rise, and the theoretical temperature rise. The method further comprises the following steps:

3. The method of claim 2, wherein, if no fault removal operation of the target high-voltage electronic device is detected within a preset time after the fault warning information of the target high-voltage electronic device is sent to the user, the fault warning information of the target high-voltage electronic device is sent to the user again. The method further comprises the following steps:

4. The method of claim 2, wherein, reporting the user identifier and the fault warning information of the target high-voltage electronic device to a cloud platform, so that the cloud platform pushes the fault warning information to a mobile terminal of the user based on the user identifier. The target high-voltage electronic device is provided with a temperature detection unit, and the method further comprises the following steps:

5. The method of claim 2, wherein, in response to a vehicle charging request, waking up the temperature detection unit; and / or, when the state-of-charge of the battery exceeds the preset state-of-charge range, turning off the temperature detection unit.

6. The method of claim 1, wherein, The method comprises the following steps: a temperature acquisition module for obtaining an initial temperature of a target high-voltage electronic device and an actual temperature rise of the target high-voltage electronic device in a preset state-of-charge range of a battery when the vehicle is charging, wherein the target high-voltage electronic device is located in a high-voltage loop in which the battery is located; ​ 7. A high voltage electronic device fault detection apparatus, characterized by, ​ ​ The theoretical temperature rise determination module is configured to determine a theoretical temperature rise of the target high-voltage electronic device in the preset state of charge range based on a preset relationship, where the preset relationship represents temperatures of the target high-voltage electronic device at different initial temperatures and state of charges of the battery; The fault detection module is configured to determine that the target high-voltage electronic device has a fault when the actual temperature rise is greater than the theoretical temperature rise and a difference between the actual temperature rise and the theoretical temperature rise is greater than a temperature difference warning threshold of the target high-voltage electronic device. The theoretical temperature rise determination module is specifically configured to, based on the preset relationship, find a first temperature corresponding to a lower limit value of the preset state of charge range and a second temperature corresponding to an upper limit value of the preset state of charge range at the initial temperature; and take a difference between the second temperature and the first temperature as the theoretical temperature rise.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium stores programs or instructions, which cause the computer to perform the steps of the method according to any one of claims 1 to 6.

9. A vehicle characterized by comprising: Comprise: One or more processors; Memory for storing one or more programs or instructions; The processor is configured to perform the steps of the method according to any one of claims 1 to 6 by invoking the programs or instructions stored in the memory.

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