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

Abstract

The invention relates to a high-voltage electronic device fault detection method and device, a medium and a vehicle. The method comprises the steps that when a vehicle is charged, the initial temperature of a target high-voltage electronic device and the actual temperature rise of the target high-voltage electronic device within the preset charge state range of a battery are obtained, and the target high-voltage electronic device is located in a high-voltage loop where the battery is located; on the basis of a preset relation, the theoretical temperature rise of the target high-voltage electronic device in the preset state-of-charge range is determined, and the preset relation represents the temperatures of the target high-voltage electronic device at different initial temperatures and the battery state-of-charge; and when the actual temperature rise is greater than the theoretical temperature rise and a difference value between the actual temperature rise and the theoretical temperature rise is greater than a temperature difference early warning threshold value of the target high-voltage electronic device, determining that the target high-voltage electronic device has a fault. According to the technical scheme, the vehicle safety can be improved.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular to a method, device, medium and vehicle for detecting faults of high-voltage electronic devices. Background Art

[0002] The high-voltage battery is an essential component as a power source for electric vehicles or hybrid vehicles. At the same time, in order to realize the high-voltage battery to supply high voltage 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 the main positive relay, the main negative relay and each branch fuse.

[0003] After experiencing multiple high-current shocks, high-voltage electronic devices will be damaged and unable to play the corresponding role in the high-voltage circuit, reducing vehicle safety. For example, after experiencing multiple high-current shocks, the internal structure of the relay will be damaged. In emergency situations such as short circuits caused by motor failures and vehicle collisions, the relay will stick and be unable to disconnect the main circuit, causing certain safety hazards; and after multiple high-current shocks, the internal narrow diameter of the fuse will be damaged, and the vehicle will be abnormally melted during acceleration, resulting in rear-end collisions or other failures. At present, the battery management system only detects the adhesion state of the relay through the voltage acquisition circuit when the vehicle is powered on. It is unable to identify all faulty high-voltage electronic devices in advance, resulting in users being unable to replace or repair faulty high-voltage electronic devices in a timely manner, affecting user travel. Summary of the invention

[0004] In order to solve the above technical problems, the present disclosure provides a high-voltage electronic device fault detection method, device, medium and vehicle to improve the safety of the vehicle.

[0005] The present disclosure provides a high-voltage electronic device fault detection method, comprising:

[0006] When the vehicle is charging, obtaining an initial temperature of a target high-voltage electronic device and an actual temperature rise of the target high-voltage electronic device within a preset state of charge range of the battery, wherein the target high-voltage electronic device is located in a high-voltage circuit where the battery is located;

[0007] Determine a 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;

[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 component, it is determined that the target high-voltage electronic component has a fault.

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

[0010] Based on the preset relationship, searching, at the initial temperature, 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;

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

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

[0013] Acquiring a user identification of a vehicle owner, device information of the target high-voltage electronic device, and fault information of the target high-voltage electronic device;

[0014] Sending fault warning information of the target high-voltage electronic device to a user corresponding to the user identifier, the fault warning information including the device information and the fault information.

[0015] In the present 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 a fault clearing operation of the target high-voltage electronic device, the initial temperature, the actual temperature rise, and the theoretical temperature rise are cleared.

[0017] In the present 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 the fault clearing operation of the target high-voltage electronic device is not 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.

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

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

[0021] In the present 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, waking up the temperature detection unit;

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

[0024] The present disclosure provides a high-voltage electronic device fault detection device, comprising:

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

[0026] A theoretical temperature rise determination module, configured to determine a 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] A fault detection module is used to determine that a fault exists 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 a temperature difference warning threshold of the target high-voltage electronic device.

[0028] The present disclosure also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a program or instruction, wherein the program or instruction enables a computer to execute the steps of any of the above methods.

[0029] The present disclosure also provides a vehicle, comprising:

[0030] one or more processors;

[0031] A memory for storing one or more programs or instructions;

[0032] The processor is used to execute the steps of any of the above methods by calling the program or instruction stored in the memory.

[0033] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0034] The technical solution provided by the embodiment of the present disclosure obtains the actual temperature rise and theoretical temperature rise of the target high-voltage electronic device within the preset state of charge range of the battery when the vehicle is charged. Since the internal resistance of the high-voltage electronic device will increase when a fault occurs, the temperature rise of the corresponding high-voltage electronic device within the same state of charge range of the battery will increase due to the increase in internal resistance. Therefore, by setting the temperature difference warning threshold of 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, it indicates that the internal resistance of the target high-voltage electronic device has increased to the extent of the target high-voltage electronic device failure. Therefore, in the vehicle charging stage, the technical solution of the present disclosure can determine that the target high-voltage electronic device has a fault based on the fact that 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, so that all faulty high-voltage electronic devices can be identified in advance, and then the user can be reminded to replace or repair the faulty high-voltage electronic device in time, thereby improving the safety of the vehicle and ensuring the safety of the user's travel; at the same time, the health status of the high-voltage electronic device can be detected in each charging cycle, so as to ensure that the vehicle can operate safely and effectively throughout its life cycle. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0037] Figure 1 A flow chart of a high-voltage electronic device fault detection method provided by an embodiment of the present disclosure;

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

[0039] Figure 3 A schematic diagram of the structure of a vehicle provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0040] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0042] Figure 1 This is a flow chart of a high-voltage electronic device fault detection method provided by an embodiment of the present disclosure. This method is applicable to the case where fault detection is performed on electronic devices in a high-voltage circuit when an electric vehicle and / or a hybrid vehicle is charging. This method can be performed by a high-voltage electronic device fault detection device, which can be implemented in software and / or hardware and can be configured in a battery management system. Figure 1 As shown, the method comprises the following steps:

[0043] S110 . When the vehicle is charging, obtaining an initial temperature of a target high-voltage electronic component and an actual temperature rise of the target high-voltage electronic component within a preset state of charge range of the battery.

[0044] The target high-voltage electronic device is located in the high-voltage circuit where the battery is located. The target high-voltage electronic device may include one or more high-voltage electronic devices, and the battery management system may obtain the initial temperature and actual temperature rise of each high-voltage electronic device respectively. The target high-voltage electronic device may specifically 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 provided at the target high-voltage electronic device. When the vehicle is charging, the temperature detection unit collects temperature data of the target high-voltage electronic device in real time and transmits the temperature data to the battery management system. The battery management system determines the initial temperature of the target high-voltage electronic device based on the temperature data at the beginning of charging, and determines the actual temperature rise of the target high-voltage electronic device (the difference between the corresponding values ​​of the two temperature data) 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.

[0046] It should be noted that the target high-voltage electronic devices involved in the high-voltage electronic device fault detection method disclosed in the present invention are all high-voltage electronic devices in use. In addition, the present invention 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: Determine a theoretical temperature rise of a target high-voltage electronic device within a preset state of charge range based on a preset relationship.

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

[0049] In some embodiments, based on a preset relationship, the theoretical temperature rise of the target high-voltage electronic device within a preset state of charge range of the battery is determined, including: based on the preset relationship, searching for 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 an initial temperature; and taking 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 a fault exists in the target high-voltage electronic device.

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

[0052] Since the internal resistance of the target high-voltage electronic device will increase when there is a fault, the actual temperature rise of the faulty target high-voltage electronic device will increase within the same preset state of charge range when the vehicle is charged. Based on this, the actual temperature rise of the target high-voltage electronic device is compared with the theoretical temperature rise. 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 can be determined that there is a fault in the target high-voltage electronic device. Obviously, when the actual temperature rise is less than or equal to the theoretical temperature rise, the technical solutions disclosed in this disclosure all determine that the target high-voltage electronic device has no fault.

[0053] The high-voltage electronic device fault detection method provided in the embodiment of the present disclosure obtains 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 when the vehicle is charging. Since the internal resistance of the high-voltage electronic device will increase when a fault occurs, the temperature rise of the corresponding high-voltage electronic device within the same state of charge range of the battery will increase due to the increase in internal resistance. Therefore, by setting the temperature difference warning threshold of 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, it indicates that the internal resistance of the target high-voltage electronic device has increased to the extent of a fault of the target high-voltage electronic device. Therefore, during the vehicle charging stage, the technical solution disclosed in the present invention can determine that the target high-voltage electronic device has a fault based on the fact that 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. This can identify all faulty high-voltage electronic devices in advance, and then remind the user to replace or repair the faulty high-voltage electronic devices in time, thereby improving the safety of the vehicle and ensuring the safety of users' travel. At the same time, the health status of the high-voltage electronic devices can be detected in each charging cycle, thereby ensuring that the vehicle can operate safely and efficiently throughout its life cycle.

[0054] In some embodiments, after determining that the target high-voltage electronic device has a fault, the method further includes: obtaining the user identification of the owner, the device information of the target high-voltage electronic device, and the fault information of the target high-voltage electronic device; sending the fault warning information of the target high-voltage electronic device to the user corresponding to the user identification, and the fault warning information includes the device information and the fault information. In this way, the user can be reminded in time to repair or replace the faulty high-voltage electronic device to avoid the safety hazards caused by the faulty high-voltage electronic device. Among them, the user identification may include the communication number of the mobile terminal bound by the user, such as the phone number of the mobile phone; the device information may include the name, model and system of the target high-voltage electronic device; the fault information may include the device failure or abnormal temperature rise, etc., which are used to directly or indirectly indicate that the target high-voltage electronic device has a fault. Specifically, sending the fault warning information of the target high-voltage electronic device to the user includes: reporting the user identification and the fault warning information of the target high-voltage electronic device to the cloud platform, so that the cloud platform pushes the fault warning information to the user's mobile terminal based on the user identification. Exemplarily, 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 sends the fault warning information to the user's mobile terminal in the form of a text message based on the communication number of the mobile terminal.

[0055] In some embodiments, after sending the fault warning information of the target high-voltage electronic device to the user, the method further includes: in response to the fault removal operation of the target high-voltage electronic device, the initial temperature, the actual temperature rise, and the theoretical temperature rise are cleared. The fault removal operation may include a confirmation operation that the target high-voltage electronic device has been replaced, or a confirmation operation that the target high-voltage electronic device has been repaired, or a shutdown operation of the fault reminder. After the fault of the target high-voltage electronic device is removed, the previously acquired initial temperature, actual temperature rise, and theoretical temperature rise are cleared to release storage space.

[0056] In some embodiments, after sending the fault warning information of the target high-voltage electronic device to the user, the method further includes: if the fault relief operation of the target high-voltage electronic device is not 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. In order to ensure that the user receives the fault warning information, this embodiment will send the fault warning information to the user again if the user does not respond to the fault warning information within the preset time. Among them, the preset time is set based on the frequency that will not disturb the user, such as half an hour or 1 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, when the state of charge of the battery exceeds a preset state of charge range, turning off the temperature detection unit. In this embodiment, the temperature detection unit is woken up only when charging starts, and / or, the temperature detection unit is turned off when the state of charge of the battery exceeds a 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 embodiment of the present disclosure, the embodiment of the present disclosure also provides a high-voltage electronic device fault detection device. Figure 2 A structural block diagram of a high-voltage electronic device fault detection device provided in an embodiment of the present disclosure, such as Figure 2 As shown, the high-voltage electronic device fault detection device comprises:

[0059] The 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 charged, wherein the target high-voltage electronic device is located in the high-voltage circuit where the battery is located;

[0060] Theoretical temperature rise determination module 22, 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 states of charge;

[0061] The fault detection module 23 is used to determine that a fault exists 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 to:

[0063] Based on the preset relationship, searching, at the initial temperature, for a first temperature corresponding to a lower limit value of a preset state of charge range and a second temperature corresponding to an upper limit value of the preset state of charge range;

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

[0065] In some embodiments, the device further includes a fault warning information sending module, which is used to:

[0066] After determining that a fault exists in the target high-voltage electronic device, fault warning information of the target high-voltage electronic device is sent to a user.

[0067] In some embodiments, the apparatus further comprises a data clearing module, configured to:

[0068] After the fault warning information of the target high-voltage electronic device is sent to the user, in response to the fault removal operation of the target high-voltage electronic device, the initial temperature, the actual temperature rise, and the theoretical temperature rise are cleared.

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

[0070] After sending fault warning information of the target high-voltage electronic device to the user, if no fault resolution operation of the target high-voltage electronic device is detected within a preset time after sending the fault warning information of the target high-voltage electronic device to the user, the fault warning information of the target high-voltage electronic device is sent to the user again.

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

[0072] Report the fault warning information of the target high-voltage electronic device 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, waking up a temperature detection unit;

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

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

[0077] The embodiment of the present disclosure also provides a computer-readable storage medium, which stores a program or instruction, and the program or instruction enables a computer to execute the steps of any of the above methods.

[0078] Exemplarily, the program or instruction causes a computer to execute a high-voltage electronic device fault detection method, the method comprising:

[0079] When the vehicle is charging, obtaining an initial temperature of a target high-voltage electronic device and an actual temperature rise of the target high-voltage electronic device within a preset state of charge range of the battery, wherein the target high-voltage electronic device is located in a high-voltage circuit where the battery is located;

[0080] Determine a 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 states of charge;

[0081] 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 a fault exists in the target high-voltage electronic device.

[0082] Optionally, when executed by a computer processor, the computer executable instructions can also be used to execute the technical solution of any of the above-mentioned high-voltage electronic device fault detection methods provided in the embodiments of the present disclosure, thereby achieving corresponding beneficial effects.

[0083] Through the above description of the implementation method, the technicians in the relevant field can clearly understand that the embodiments of the present disclosure can be implemented with the help of software and necessary general hardware, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the embodiments of the present disclosure is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the 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 (FLASH), hard disk or optical disk, etc., including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods described in each embodiment of the present disclosure.

[0084] The embodiment of the present disclosure also provides a vehicle, comprising: one or more processors; a memory for storing one or more programs or instructions; the processor calls the programs or instructions stored in the memory to execute the steps of any of the above methods to achieve corresponding beneficial effects.

[0085] Figure 3 Schematic diagram of the hardware structure of a vehicle provided in an embodiment of the present disclosure. 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 forms of processing units having data processing capabilities 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, a random access memory (RAM) and / or a cache memory (cache), etc. The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 301 may run the program instructions to implement the high-voltage electronic device fault detection method of the embodiment of the present disclosure described above, and / or other desired functions. Various contents such as input signals, signal components, noise components, etc. may also be stored in the computer-readable storage medium.

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

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

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

[0091] Of course, to simplify, Figure 3 Only some of the components in the vehicle related to the present disclosure are shown, and components such as buses, input / output interfaces, etc. are omitted. In addition, the vehicle may further include any other appropriate components according to specific application scenarios.

[0092] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0093] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be 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 the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for detecting faults in high-voltage electronic devices, characterized in that: include: When the vehicle is charging, obtaining an initial temperature of a target high-voltage electronic device and an actual temperature rise of the target high-voltage electronic device within a preset state of charge range of the battery, wherein the target high-voltage electronic device is located in a high-voltage circuit where the battery is located; Determine a 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; 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 component, it is determined that the target high-voltage electronic component has a fault.

2. The method according to claim 1, characterized in that The determining, based on the preset relationship, a theoretical temperature rise of the target high-voltage electronic device within a preset state of charge range of the battery includes: Based on the preset relationship, searching, at the initial temperature, 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; The difference between the second temperature and the first temperature is taken as the theoretical temperature rise.

3. The method according to claim 1, characterized in that: After determining that the target high-voltage electronic device has a fault, the method further includes: Acquiring a user identification 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, the fault warning information including the device information and the fault information.

4. The method according to claim 3, characterized in that 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: In response to a fault clearing operation of the target high-voltage electronic device, the initial temperature, the actual temperature rise, and the theoretical temperature rise are cleared.

5. The method according to claim 3, characterized in that: 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: If the fault clearing operation of the target high-voltage electronic device is not 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.

6. The method according to claim 3, characterized in that The sending the fault warning information of the target high-voltage electronic device to the user corresponding to the user identifier includes: The user identification and the fault warning information of the target high-voltage electronic device are reported to the cloud platform, so that the cloud platform pushes the fault warning information to the mobile terminal of the user based on the user identification.

7. The method according to claim 1, characterized in that A temperature detection unit is provided at the target high-voltage electronic device, and the method further comprises: 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.

8. A high voltage electronic device fault detection device, characterized in that: include: A temperature acquisition module, used to acquire an initial temperature of a target high-voltage electronic device and an actual temperature rise of the target high-voltage electronic device within a preset state of charge range of the battery when the vehicle is charged, wherein the target high-voltage electronic device is located in a high-voltage circuit where the battery is located; A theoretical temperature rise determination module, configured to determine a 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; A fault detection module is used to determine that a fault exists 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 a temperature difference warning threshold of the target high-voltage electronic device.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program or instruction, and the program or instruction enables a computer to execute the steps of the method according to any one of claims 1 to 7.

10. A vehicle, characterized in that: include: one or more processors; A memory for storing one or more programs or instructions; The processor is used to execute the steps of the method according to any one of claims 1 to 7 by calling the program or instruction stored in the memory.

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