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

Abstract

Provided are a high-voltage electronic device fault detection method and apparatus, a medium and a vehicle. The method comprises: when a 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 in a preset charge state range of a battery, wherein the target high-voltage electronic device is located in the high-voltage loop of the battery; on the basis of a preset relationship, determining a theoretical temperature rise of the target high-voltage electronic device in the preset charge state range, wherein the preset relationship represents the temperature of the target high-voltage electronic device at different initial temperatures and in different battery charge states; when the actual temperature rise is greater than the theoretical temperature rise and the difference value between the actual temperature rise and the theoretical temperature rise is greater than a temperature difference early warning threshold of the target high-voltage electronic device, determining that the target high-voltage electronic device has a fault. The present high-voltage electronic device fault detection method improves vehicle safety.

Description

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

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on July 6, 2023, with application number 202310827720.4 and invention name “High-voltage electronic device fault detection method, device, medium and vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application 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

[0003] A high-voltage battery is an essential component of the power source for electric vehicles or hybrid vehicles. At the same time, in order to realize the high-voltage battery's high-voltage power supply 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.

[0004] High-voltage electronic devices can become damaged after experiencing multiple high-current shocks, becoming unable to function in the high-voltage circuit and reducing vehicle safety. For example, after a relay experiences multiple high-current shocks, its internal structure can be damaged. In emergencies such as motor failures and short circuits caused by vehicle collisions, the relay can become stuck and unable to disconnect the main circuit, posing a safety hazard. Fuses can also become damaged after experiencing multiple high-current shocks, causing them to melt abnormally during vehicle acceleration, leading to rear-end collisions or other malfunctions. Currently, battery management systems only detect relay sticking through a voltage acquisition circuit when the vehicle is powered on. This makes it impossible to identify all faulty high-voltage electronic devices in advance, preventing users from replacing or repairing faulty high-voltage electronic devices in a timely manner, impacting their travel.

[0005] Summary of the Invention

[0006] In order to solve the above technical problems, the present application provides a high-voltage electronic device fault detection method, device, medium and vehicle to improve the safety of the vehicle.

[0007] The present application provides a method for detecting faults in high-voltage electronic devices, comprising:

[0008] 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, wherein the target high-voltage electronic component is located in a high-voltage circuit where the battery is located;

[0009] Determining a theoretical temperature rise of the target high-voltage electronic component 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 component at different initial temperatures and battery states of charge;

[0010] 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.

[0011] In the present application, 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:

[0012] Based on the preset relationship, searching, at the initial temperature, 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;

[0013] The difference between the second temperature and the first temperature is taken as the theoretical temperature rise.

[0014] In the present application, after determining that the target high-voltage electronic device has a fault, the method further includes:

[0015] 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;

[0016] Sending fault warning information of the target high-voltage electronic device to a user terminal corresponding to the user identifier, wherein the fault warning information includes the device information and the fault information.

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

[0018] In response to a fault clearing operation of the target high-voltage electronic component, the initial temperature, the actual temperature rise, and the theoretical temperature rise are cleared.

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

[0020] If no fault clearing 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 terminal, the fault warning information of the target high-voltage electronic device is sent to the user terminal again.

[0021] In the present application, the sending of the fault warning information of the target high-voltage electronic device to the user terminal corresponding to the user identifier includes:

[0022] 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 corresponding user terminal based on the user identification.

[0023] In the present application, a temperature detection unit is provided at the target high-voltage electronic device, and the temperature detection unit is used to collect temperature data of the target high-voltage electronic device; the method further includes:

[0024] waking up the temperature detection unit in response to a vehicle charging request;

[0025] And / or, when the state of charge of the battery exceeds the preset state of charge range, turning off the temperature detection unit.

[0026] The present application provides a high-voltage electronic device fault detection device, comprising:

[0027] a temperature acquisition module, configured to acquire, when the vehicle is charging, 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, wherein the target high-voltage electronic component is located in the high-voltage circuit where the battery is located;

[0028] a theoretical temperature rise determination module, configured to determine a theoretical temperature rise of the target high-voltage electronic component within the preset state of charge range based on a preset relationship, wherein the preset relationship represents the temperature of the target high-voltage electronic component at different initial temperatures and battery states of charge;

[0029] The fault detection module is used to determine that a fault exists in the target high-voltage electronic component 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.

[0030] In this application, the theoretical temperature rise determination module is specifically used to:

[0031] Based on the preset relationship, searching, at the initial temperature, 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;

[0032] The difference between the second temperature and the first temperature is taken as the theoretical temperature rise.

[0033] In this application, the device further includes a fault warning information sending module, which is used to:

[0034] After determining that the target high-voltage electronic component has a fault, obtaining a user identification of the vehicle owner, component information of the target high-voltage electronic component, and fault information of the target high-voltage electronic component;

[0035] Sending fault warning information of the target high-voltage electronic device to a user terminal corresponding to the user identifier, wherein the fault warning information includes the device information and the fault information.

[0036] In this application, the device further includes a data clearing module, which is used to:

[0037] After sending the fault warning information of the target high-voltage electronic device to the user terminal corresponding to the user identifier, 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.

[0038] In this application, the fault warning information sending module is also used to:

[0039] If no fault clearing 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 terminal, the fault warning information of the target high-voltage electronic device is sent to the user terminal again.

[0040] In this application, the fault warning information sending module is also used to:

[0041] 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 corresponding user terminal based on the user identification.

[0042] In the present application, a temperature detection unit is provided at the target high-voltage electronic device, and the temperature detection unit is used to collect temperature data of the target high-voltage electronic device; the device also includes a temperature detection wake-up module, which is used to:

[0043] waking up the temperature detection unit in response to a vehicle charging request;

[0044] And / or, when the state of charge of the battery exceeds the preset state of charge range, turning off the temperature detection unit.

[0045] The present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a program or instruction, and the program or instruction enables a computer to execute the steps of any of the above methods.

[0046] The present application also provides a vehicle, comprising:

[0047] one or more processors;

[0048] a memory for storing one or more programs or instructions;

[0049] The processor is configured to execute the steps of any of the above methods by calling the program or instructions stored in the memory.

[0050] The present application also provides a computer program, comprising computer-readable codes, which, when executed on a computing and processing device, cause the computing and processing device to execute the steps of any of the above methods.

[0051] The technical solution provided by the embodiments of the present application has the following advantages compared with the prior art:

[0052] The technical solution provided by the embodiment of the present application 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 during vehicle charging. Since the internal resistance of the high-voltage electronic device increases when a fault occurs, the temperature rise of the corresponding high-voltage electronic device within the same state of charge range of the battery increases due to the increase in 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 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 that the target high-voltage electronic device is faulty. Therefore, during the vehicle charging phase, the technical solution of the present application 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 temperature rise and the theoretical temperature rise is greater than the temperature difference warning threshold of the target high-voltage electronic device, thereby being able to identify all faulty high-voltage electronic devices in advance, and then being able to remind the user to replace or repair the faulty high-voltage electronic device in a timely manner, thereby improving the safety of the vehicle and ensuring the user's safe travel. At the same time, the health status of the high-voltage electronic device can be tested in each charging cycle, thereby ensuring the safe and efficient operation of the vehicle throughout its life cycle.

[0053] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0055] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0056] FIG1 is a flow chart of a method for detecting a fault in a high-voltage electronic device according to an embodiment of the present application;

[0057] FIG2 is a structural block diagram of a high-voltage electronic device fault detection device provided in an embodiment of the present application;

[0058] FIG3 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0059] FIG4 schematically shows a storage unit for storing or carrying program codes for implementing the method according to the present application. DETAILED DESCRIPTION

[0060] In order to more clearly understand the above-mentioned objectives, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0061] The following description sets forth many specific details to facilitate a thorough understanding of this application. However, this application may also be implemented in other ways than those described herein. It is apparent that the embodiments described in this specification are only a portion of the embodiments of this application, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of this application without inventive effort are also within the scope of protection of this application.

[0062] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0063] FIG1 is a flow chart of a high-voltage electronic device fault detection method provided in an embodiment of the present application. The high-voltage electronic device fault detection 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 hybrid vehicle is charging. The high-voltage electronic device fault detection 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. As shown in FIG1 , the method includes the following steps:

[0064] 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.

[0065] 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 battery management system may separately obtain the initial temperature and actual temperature rise of each high-voltage electronic device. Specifically, the target high-voltage electronic device may include at least one of a relay, a fuse, and a shunt.

[0066] 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 start of charging, and determines the actual temperature rise 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 actual temperature rise is the difference between the corresponding values ​​of the aforementioned two temperature data.

[0067] It should be noted that the target high-voltage electronic devices involved in the high-voltage electronic device fault detection method of this application are all high-voltage electronic devices in use. Furthermore, this application does not restrict the selection of the preset SOC range, as long as the temperature change of the target high-voltage electronic device can be detected. Optionally, the preset SOC range is 20% to 80% to meet the charging needs of most vehicles.

[0068] S120: Determine a theoretical temperature rise of the target high-voltage electronic device within a preset state of charge range based on a preset relationship.

[0069] The preset relationship represents the temperature of the target high-voltage electronic component at different initial temperatures and battery states of charge, where the initial temperature can be considered the ambient temperature. This preset relationship can be obtained by charging a faulty high-voltage electronic component at different initial temperatures, or it can be provided by the supplier of the high-voltage electronic component. Optionally, the preset relationship can be stored in the form of a relationship table.

[0070] In some embodiments, based on a preset relationship, the theoretical temperature rise of the target high-voltage electronic device within the preset state of charge range of the battery is determined, including: based on the preset relationship, searching for a first temperature corresponding to the lower limit value of the preset state of charge range and a second temperature corresponding to the 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.

[0071] 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 component, determine that the target high-voltage electronic component has a fault.

[0072] 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 based on 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 the actual temperature rise of the target high-voltage electronic device under normal conditions.

[0073] Because the internal resistance of a target high-voltage electronic device increases when it is faulty, the actual temperature rise of the faulty target high-voltage electronic device will increase within the same preset state of charge range when charging the vehicle. 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 the target high-voltage electronic device is faulty. Obviously, when the actual temperature rise is less than or equal to the theoretical temperature rise, the technical solution of this application determines that the target high-voltage electronic device is not faulty.

[0074] The high-voltage electronic device fault detection method provided in the embodiment of the present application 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 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 become higher 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 that the target high-voltage electronic device has failed. Therefore, during the vehicle charging stage, the technical solution of the present application can determine that there is a fault in the target high-voltage electronic device 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, thereby being able to identify all faulty high-voltage electronic devices in advance, and then being able to 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 tested in each charging cycle, thereby ensuring that the vehicle can operate safely and effectively throughout its life cycle.

[0075] In some embodiments, after determining that a fault exists in the target high-voltage electronic device, the high-voltage electronic device fault detection method further includes: obtaining the user identification of the vehicle owner, device information of the target high-voltage electronic device, and fault information of the target high-voltage electronic device; and sending fault warning information of the target high-voltage electronic device to the user terminal corresponding to the user identification, where the fault warning information includes device information and fault information.

[0076] This allows users to promptly remind themselves to repair or replace faulty high-voltage electronic devices, thereby avoiding potential safety hazards caused by these devices. The user identifier can include the communication number of a mobile terminal bound to the user, such as a mobile phone number; the device information can include the name, model, and system of the target high-voltage electronic device; and the fault information can include characters such as device failure or abnormal temperature rise that directly or indirectly indicate a fault in the target high-voltage electronic device.

[0077] Specifically, sending fault warning information of the target high-voltage electronic device to the user terminal includes: reporting the user identifier 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 terminal based on the user identifier.

[0078] 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 sends the fault warning information to the user terminal in the form of a text message based on the communication number of the mobile terminal.

[0079] In some embodiments, after sending the fault warning information of the target high-voltage electronic device to the user terminal, the high-voltage electronic device fault detection method further includes: in response to the fault removal operation of the target high-voltage electronic device, clearing the initial temperature, actual temperature rise, and theoretical temperature rise. The fault removal operation may include a confirmation operation that the target high-voltage electronic device has been replaced, a confirmation operation that the target high-voltage electronic device has been repaired, or a fault reminder closing operation. After the fault of the target high-voltage electronic device is removed, the previously obtained initial temperature, actual temperature rise, and theoretical temperature rise are cleared to free up storage space.

[0080] In some embodiments, after sending fault warning information about a target high-voltage electronic device to a user terminal, the high-voltage electronic device fault detection method further includes: if no fault resolution operation is detected for the target high-voltage electronic device within a preset time after sending the fault warning information about the target high-voltage electronic device to the user terminal, then sending the fault warning information about the target high-voltage electronic device to the user terminal again. To ensure that the user receives the fault warning information, this embodiment sends the fault warning information to the user again if the user does not respond to the fault warning information within the preset time. The preset time is set based on a frequency that does not disturb the user, such as half an hour or one hour.

[0081] In some embodiments, a temperature detection unit is provided at the target high-voltage electronic device, and the temperature detection unit is used to collect temperature data of the target high-voltage electronic device.

[0082] The high-voltage electronic device fault detection method further includes: waking up the temperature detection unit in response to a vehicle charging request; and / or shutting down the temperature detection unit when the battery's state of charge exceeds a preset state of charge range. This embodiment only wakes up the temperature detection unit when charging begins, and / or shuts down the temperature detection unit when the battery's state of charge exceeds a preset state of charge range, thereby saving power consumption of the temperature detection unit.

[0083] Corresponding to the high-voltage electronic device fault detection method provided in the embodiment of the present application, the embodiment of the present application also provides a high-voltage electronic device fault detection device. FIG2 is a structural block diagram of the high-voltage electronic device fault detection device provided in the embodiment of the present application. As shown in FIG2 , the high-voltage electronic device fault detection device includes:

[0084] a temperature acquisition module 21 for acquiring, during vehicle charging, 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, wherein the target high-voltage electronic component is located in the high-voltage circuit where the battery is located;

[0085] a theoretical temperature rise determination module 22 for determining a theoretical temperature rise of a target high-voltage electronic component within a preset state of charge range based on a preset relationship, wherein the preset relationship represents the temperature of the target high-voltage electronic component at different initial temperatures and battery states of charge;

[0086] The fault detection module 23 is configured 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.

[0087] In some embodiments, the theoretical temperature rise determination module 22 is specifically configured to:

[0088] 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;

[0089] The difference between the second temperature and the first temperature is taken as the theoretical temperature rise.

[0090] In some embodiments, the high-voltage electronic device fault detection apparatus further includes a fault warning information sending module, which is configured to:

[0091] After determining that the target high-voltage electronic device has a fault, obtaining a user ID of the vehicle owner, device information of the target high-voltage electronic device, and fault information of the target high-voltage electronic device;

[0092] The fault warning information of the target high-voltage electronic device is sent to the user terminal corresponding to the user identifier, where the fault warning information includes device information and fault information.

[0093] In some embodiments, the high-voltage electronic device fault detection apparatus further includes a data clearing module for:

[0094] After sending the fault warning information of the target high-voltage electronic device to the user terminal corresponding to the user identifier, 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.

[0095] In some embodiments, the fault warning information sending module is further used to:

[0096] After sending the fault warning information of the target high-voltage electronic device to the user terminal, 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 terminal, the fault warning information of the target high-voltage electronic device is sent to the user terminal again.

[0097] In some embodiments, the fault warning information sending module is specifically used to:

[0098] Report 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 terminal corresponding to the user identifier.

[0099] In some embodiments, a temperature detection unit is provided at the target high-voltage electronic device, and the temperature detection unit is used to collect temperature data of the target high-voltage electronic device; the high-voltage electronic device fault detection apparatus further includes a temperature detection unit control module, which is used to:

[0100] In response to a vehicle charging request, waking up the temperature detection unit;

[0101] And / or, when the state of charge of the battery exceeds a preset state of charge range, the temperature detection unit is turned off.

[0102] 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.

[0103] An embodiment of the present application further 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.

[0104] Exemplarily, the program or instructions cause a computer to execute a high-voltage electronic device fault detection method, the method comprising:

[0105] 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, wherein the target high-voltage electronic component is located in a high-voltage circuit where the battery is located;

[0106] Determining a theoretical temperature rise of the target high-voltage electronic component 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 component at different initial temperatures and battery states of charge;

[0107] 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 a fault exists in the target high-voltage electronic component.

[0108] Optionally, when executed by a computer processor, the computer executable instructions can also be used to execute the technical solutions of any of the above-mentioned high-voltage electronic device fault detection methods provided in the embodiments of the present application to achieve corresponding beneficial effects.

[0109] Through the above description of the implementation methods, those skilled in the art can clearly understand that the embodiments of the present application can be implemented with the help of software and necessary general-purpose hardware, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a computer's floppy disk, read-only memory (ROM), random access memory (RAM), flash memory (FLASH), hard disk or optical disk, etc., including a number of instructions for enabling 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 application.

[0110] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0111] The various component embodiments of the present application can be implemented in hardware, or in a software module running on one or more processors, or in a combination thereof. It will be appreciated by those skilled in the art that a microprocessor or a digital signal processor (DSP) can be used in practice to implement some or all of the functions of some or all of the components in the computing processing equipment according to the embodiment of the present application. The application can also be implemented as a device or apparatus program (for example, a computer program and a computer program product) for performing a part or all of the methods described herein. Such a program implementing the present application can be stored on a computer-readable medium, or can have the form of one or more signals. Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0112] An embodiment of the present application 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.

[0113] FIG3 is a schematic diagram of the hardware structure of a vehicle provided in an embodiment of the present application. As shown in FIG3 , the vehicle includes one or more processors 301 and a memory 302 .

[0114] 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.

[0115] 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), a hard disk, flash memory, etc.

[0116] The computer-readable storage medium may store one or more computer program instructions, and the processor 301 may execute the program instructions to implement the high-voltage electronic device fault detection method of the embodiment of the present application described above, and / or other desired functions. The computer-readable storage medium may also store various contents such as input signals, signal components, and noise components.

[0117] The present application also provides a computer program product, which includes a program code carrier such as a hard disk, a compact disk (CD), a memory card, or a floppy disk. Such a computer program product is typically a portable or fixed storage unit as described with reference to FIG4 . The storage unit may have storage segments, storage spaces, etc. arranged similarly to the memory 302 in the vehicle of FIG3 . The program code may be compressed, for example, in an appropriate form. Typically, the storage unit includes computer-readable code, i.e., code that can be read by a processor such as 301, which, when executed by a computing processing device, causes the computing processing device to perform the various steps in the method described above.

[0118] 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).

[0119] In addition, the input device 303 may also include, for example, a keyboard, a mouse, and the like.

[0120] The output device 304 can output various information to the outside, including determined distance information, direction information, etc. The output device 304 can include, for example, a display, a speaker, a printer, a communication network and its connected remote output device, etc.

[0121] Of course, for simplicity, FIG3 only shows some of the components in the vehicle that are relevant to the present application, omitting components such as buses, input / output interfaces, etc. In addition, the vehicle may further include any other appropriate components depending on the specific application.

[0122] References herein to "one embodiment," "an embodiment," or "one or more embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Furthermore, please note that instances of the phrase "in one embodiment" do not necessarily all refer to the same embodiment.

[0123] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0124] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0125] The foregoing description is intended only to provide specific embodiments of the present application, which will enable those skilled in the art to understand and implement the present application. 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 the present application. Therefore, the present application is not limited to the embodiments described herein, but is intended to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A method for detecting faults in high-voltage electronic devices, wherein: 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, wherein: 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, wherein: 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 terminal corresponding to the user identifier, wherein the fault warning information includes the device information and the fault information.

4. The method according to claim 3, wherein: After sending the fault warning information of the target high-voltage electronic device to the user terminal 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, wherein: After sending the fault warning information of the target high-voltage electronic device to the user terminal corresponding to the user identifier, the method further includes: If no fault clearing 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 terminal, the fault warning information of the target high-voltage electronic device is sent to the user terminal again.

6. The method according to claim 3, wherein: The sending the fault warning information of the target high-voltage electronic device to the user terminal 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 corresponding user terminal based on the user identification.

7. The method according to claim 1, wherein: The target high-voltage electronic device is provided with a temperature detection unit, and the temperature detection unit is used to collect temperature data of the target high-voltage electronic device; the method further includes: 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, wherein: include: A temperature acquisition module, 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 when the vehicle is charged, wherein the target high-voltage electronic device is located in the 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. The device according to claim 8, wherein: The theoretical temperature rise determination module is specifically used for: 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.

10. The device according to claim 8, wherein: The device also includes a fault warning information sending module, which is used to: After determining that the target high-voltage electronic device has a fault, obtaining a user identification of the 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 terminal corresponding to the user identifier, wherein the fault warning information includes the device information and the fault information.

11. The device according to claim 10, wherein: The device also includes a data clearing module, which is used for: After sending the fault warning information of the target high-voltage electronic device to the user terminal corresponding to the user identifier, 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.

12. The device according to claim 10, wherein: The fault warning information sending module is also used for: If no fault clearing 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 terminal, the fault warning information of the target high-voltage electronic device is sent to the user terminal again.

13. The device according to claim 10, wherein: The fault warning information sending module is also used for: Report the user identification and the fault warning information of the target high-voltage electronic device to the cloud platform so that the cloud The platform pushes the fault warning information to the corresponding user terminal based on the user identifier.

14. The device according to claim 8, wherein: The target high-voltage electronic device is provided with a temperature detection unit, and the temperature detection unit is used to collect temperature data of the target high-voltage electronic device; the device also includes a temperature detection unit control module, which is used to: 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.

15. A computer-readable storage medium, wherein: 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.

16. A vehicle, wherein: 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.

17. A computer program comprising computer readable code which, when executed on a computer processing device, causes the computer processing device to execute the steps of the method according to any one of claims 1 to 7.

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