High-voltage system and troubleshooting method

Abstract

The invention relates to a high-voltage system and a troubleshooting method. A high-voltage system belongs to the technical field of electric automobiles and comprises a master controller, a troubleshooting device, a load circuit and a power supply circuit for supplying power to the load circuit. Wherein the load circuit comprises at least one load branch circuit, different load branch circuits are connected in parallel, each load branch circuit comprises a high-voltage load and a pre-charging relay connected with the positive electrode of the high-voltage load, and the pre-charging relay is connected with the troubleshooting device. The troubleshooting device and the power supply circuit are connected with the master controller. And the main controller is used for carrying out troubleshooting after a pre-charging fault is detected in the process of pre-charging each high-voltage load by the power supply circuit. According to the invention, after the pre-charging fault occurs, through cooperation of the controller and the troubleshooting device, troubleshooting can be carried out on the load branches one by one, manual participation is not needed, manpower input is saved, and the troubleshooting efficiency and the accuracy of the troubleshooting result are effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a high voltage system and a fault troubleshooting method. Background Art

[0002] In electric vehicles, high-voltage systems are used to power high-voltage loads. With the development of electric vehicle technology, the number of high-voltage loads integrated in electric vehicles has gradually increased. Therefore, in order to ensure the stable operation of electric vehicles, it is necessary to improve the safety and reliability of high-voltage systems.

[0003] At present, when a pre-charging fault occurs during the pre-charging process of the high-voltage system, technicians are required to find the interface location of each high-voltage load and check each high-voltage load one by one to determine the cause of the pre-charging fault. However, this manual troubleshooting method is highly complex and results in low troubleshooting efficiency. Summary of the invention

[0004] Based on this, it is necessary to provide a high-voltage system and a troubleshooting method that can effectively improve the troubleshooting efficiency of the high-voltage system in response to the above technical problems.

[0005] In a first aspect, the present application provides a high voltage system. The high voltage system includes a main controller, a fault troubleshooter, a load circuit, and a power supply circuit for supplying power to the load circuit;

[0006] The load circuit includes at least one load branch, different load branches are connected in parallel with each other, each load branch includes a high-voltage load and a pre-charge relay connected to the positive electrode of the high-voltage load, and the pre-charge relay is connected to the fault detector;

[0007] The troubleshooter and the power supply circuit are both connected to the main controller;

[0008] The main controller is used to perform troubleshooting on the power supply circuit after detecting a pre-charging fault during the process of pre-charging each high-voltage load by the power supply circuit, and / or control the fault finder to disconnect each pre-charging relay from the corresponding high-voltage load one by one to perform troubleshooting on each load branch.

[0009] In one of the embodiments, the power supply circuit includes a pre-charging circuit for pre-charging each high voltage load;

[0010] The pre-charging circuit includes a DC converter and a low-voltage battery connected to the low-voltage end of the DC converter;

[0011] The DC converter and each load branch form a pre-charging circuit;

[0012] A low-voltage battery is used to supply power to the pre-charging circuit through a DC converter.

[0013] In one embodiment, the high voltage end of the DC converter is connected to each pre-charging relay, and the negative electrode of the DC converter is connected to the negative electrode of each high voltage load.

[0014] In one of the embodiments, the power supply circuit includes a high voltage circuit for supplying power to each high voltage load;

[0015] The high-voltage circuit and each load branch form a high-voltage loop.

[0016] In one embodiment, the high voltage circuit includes a power battery, a main positive relay, and a main negative relay;

[0017] The positive electrode of the power battery is connected to each pre-charging relay through the main positive relay; the negative electrode of the power battery is connected to the negative electrode of each high-voltage load through the main negative relay.

[0018] In a second aspect, the present application provides a fault troubleshooting method, which is applied to the controller of the high-voltage system in the first aspect, and the method comprises:

[0019] During the process of pre-charging each high-voltage load in the high-voltage system by the power supply circuit in the high-voltage system, after a pre-charging fault is detected, the power supply circuit is troubleshooted, and / or the fault finder in the high-voltage system is controlled to disconnect each pre-charging relay from the corresponding high-voltage load one by one, so as to troubleshoot each load branch.

[0020] In one embodiment, troubleshooting the power supply circuit, and / or controlling a troubleshooter in the high-voltage system to disconnect each pre-charge relay from the corresponding high-voltage load one by one to troubleshoot each load branch, includes:

[0021] According to the high-voltage terminal voltage of the DC converter in the power supply circuit, the power supply circuit is troubleshooted, and / or the fault finder in the high-voltage system is controlled to disconnect each pre-charge relay from the corresponding high-voltage load one by one to troubleshoot each load branch.

[0022] In one embodiment, troubleshooting the power supply circuit according to the high voltage terminal voltage of the DC converter in the power supply circuit includes:

[0023] If the voltage at the high voltage end of the DC converter in the power supply circuit is zero within the first preset time period, it is determined that the DC converter fails.

[0024] In one embodiment, according to the high voltage terminal voltage of the DC converter in the power supply circuit, the fault detector in the high voltage system is controlled to disconnect each pre-charge relay from the corresponding high voltage load one by one to perform fault detection on each load branch, including:

[0025] If the rising amplitude of the high-voltage terminal voltage of the DC converter in the power supply circuit is greater than the preset rising amplitude within the second preset time period, or if the high-voltage terminal voltage is less than the preset pre-charge voltage within the third preset time period, the fault finder in the high-voltage system is controlled to disconnect each pre-charge relay from the corresponding high-voltage load one by one to perform fault finding on each load branch.

[0026] In one embodiment, controlling a fault detector in a high voltage system to disconnect each pre-charge relay from the corresponding high voltage load one by one to perform fault detection on each load branch includes:

[0027] For each pre-charging relay, a fault detector in the high-voltage system is controlled to disconnect the pre-charging relay from the corresponding high-voltage load, and then detect whether the pre-charging fault is eliminated;

[0028] If it is eliminated, it is determined that the load branch where the pre-charging relay is located is faulty.

[0029] In a third aspect, the present application also provides a fault troubleshooting device. The device comprises:

[0030] The fault detection module is used to perform fault detection on the power supply circuit when a pre-charging fault is detected during the process of pre-charging each high-voltage load in the high-voltage system by the power supply circuit in the high-voltage system, and / or control the fault detector in the high-voltage system to disconnect each pre-charging relay from the corresponding high-voltage load one by one, so as to perform fault detection on each load branch.

[0031] In a fourth aspect, the present application further provides a computer device. The computer device includes a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0032] During the process of pre-charging each high-voltage load in the high-voltage system by the power supply circuit in the high-voltage system, after a pre-charging fault is detected, the power supply circuit is troubleshooted, and / or the fault finder in the high-voltage system is controlled to disconnect each pre-charging relay from the corresponding high-voltage load one by one, so as to troubleshoot each load branch.

[0033] In a fifth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0034] During the process of pre-charging each high-voltage load in the high-voltage system by the power supply circuit in the high-voltage system, after a pre-charging fault is detected, the power supply circuit is troubleshooted, and / or the fault finder in the high-voltage system is controlled to disconnect each pre-charging relay from the corresponding high-voltage load one by one, so as to troubleshoot each load branch.

[0035] In a sixth aspect, the present application further provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0036] During the process of pre-charging each high-voltage load in the high-voltage system by the power supply circuit in the high-voltage system, after a pre-charging fault is detected, the power supply circuit is troubleshooted, and / or the fault finder in the high-voltage system is controlled to disconnect each pre-charging relay from the corresponding high-voltage load one by one, so as to troubleshoot each load branch.

[0037] The above-mentioned high-voltage system includes a main controller, a troubleshooter, a load circuit, and a power supply circuit for supplying power to the load circuit. Among them, the load circuit includes at least one load branch, different load branches are connected in parallel with each other, and each load branch includes a high-voltage load and a pre-charge relay connected to the positive pole of the high-voltage load, and the pre-charge relay is connected to the troubleshooter. The troubleshooter and the power supply circuit are both connected to the main controller. The main controller is used to troubleshoot the power supply circuit after detecting a pre-charge fault during the process of pre-charging each high-voltage load by the power supply circuit, and / or control the troubleshooter to disconnect each pre-charge relay from the corresponding high-voltage load one by one to troubleshoot each load branch. The present application can troubleshoot the power supply circuit after the pre-charge fault, and / or troubleshoot each load branch one by one through the cooperation of the controller and the troubleshooter, without manual participation, which not only saves manpower investment, but also effectively improves the troubleshooting efficiency and the accuracy of the troubleshooting results. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic diagram of the structure of a first high-voltage system provided in this embodiment;

[0039] Figure 2 A schematic diagram of the structure of a second high-voltage system provided in this embodiment;

[0040] Figure 3 A schematic diagram of the structure of a third high-voltage system provided in this embodiment;

[0041] Figure 4 A schematic diagram of a first troubleshooting method provided in this embodiment;

[0042] Figure 5 A schematic diagram of a second troubleshooting method provided in this embodiment;

[0043] Figure 6 A structural block diagram of a fault troubleshooting device provided in this embodiment;

[0044] Figure 7 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0046] In one embodiment, if Figure 1 As shown, a high-voltage system is provided. The high-voltage system includes a main controller, a fault troubleshooter, a load circuit, and a power supply circuit for supplying power to the load circuit; wherein the load circuit includes at least one load branch, different load branches are connected in parallel, each load branch includes a high-voltage load and a pre-charging relay connected to the positive pole of the high-voltage load, and the pre-charging relay is connected to the fault troubleshooter; the fault troubleshooter and the power supply circuit are both connected to the main controller; the main controller is used to troubleshoot the power supply circuit after detecting a pre-charging fault during the process of the power supply circuit pre-charging each high-voltage load, and / or control the fault troubleshooter to disconnect each pre-charging relay from the corresponding high-voltage load one by one, so as to troubleshoot each load branch.

[0047] The load circuit refers to the high voltage load circuit in the electric vehicle. The load circuit includes more than one load branch, each load branch is connected in parallel. Figure 1 Only three load branches are shown in the figure. The pre-charge relay is a relay that can control the on and off of the corresponding load circuit. The main controller refers to the main control unit in the high-voltage system. The main controller can be used but not limited to the VCU (Vehicle Control Unit) of an electric vehicle. The fault finder refers to a device used to troubleshoot each load branch.

[0048] The above-mentioned high-voltage system includes a main controller, a troubleshooter, a load circuit, and a power supply circuit for supplying power to the load circuit. Among them, the load circuit includes at least one load branch, different load branches are connected in parallel with each other, and each load branch includes a high-voltage load and a pre-charge relay connected to the positive pole of the high-voltage load, and the pre-charge relay is connected to the troubleshooter. The troubleshooter and the power supply circuit are both connected to the main controller. The main controller is used to troubleshoot the power supply circuit after detecting a pre-charge fault during the process of pre-charging each high-voltage load by the power supply circuit, and / or control the troubleshooter to disconnect each pre-charge relay from the corresponding high-voltage load one by one to troubleshoot each load branch. The present application can troubleshoot each load branch one by one through the cooperation of the controller and the troubleshooter after the pre-charge fault, without manual participation, which not only saves manpower investment, but also effectively improves the troubleshooting efficiency and the accuracy of the troubleshooting results.

[0049] In one embodiment, if Figure 2 As shown, the power supply circuit includes a pre-charging circuit for pre-charging each high-voltage load. The pre-charging circuit includes a DC converter and a low-voltage battery connected to the low-voltage end of the DC converter. The DC converter and each load branch form a pre-charging loop. The low-voltage battery is used to supply power to the pre-charging loop through the DC converter.

[0050] The DC converter is a DC voltage converter. Its purpose is to convert the voltage of the low-voltage battery into a high voltage to pre-charge the load branch. The DC converter can be a DC / DC (Direct Current to Direct Current) module.

[0051] Optionally, in this embodiment, the high voltage end of the DC converter is connected to each pre-charging relay, and the negative electrode of the DC converter is connected to the negative electrode of each high voltage load. The on-off of each load branch can be controlled by controlling the on-off of the pre-charging relay.

[0052] When working in the pre-charging stage, the DC converter converts the low voltage of the low-voltage battery into high voltage to pre-charge the load circuit. Specifically, it pre-charges the high-voltage load in the load circuit.

[0053] Optionally, in this embodiment, the low-voltage battery is also used to supply power to low-voltage loads in the electric vehicle.

[0054] In one embodiment, if Figure 3 As shown, the power supply circuit includes a high-voltage circuit for supplying power to each high-voltage load; the high-voltage circuit and each load branch form a high-voltage loop. The high-voltage circuit includes a power battery, a main positive relay and a main negative relay; the positive electrode of the power battery is connected to each pre-charge relay through the main positive relay; the negative electrode of the power battery is connected to the negative electrode of each high-voltage load through the main negative relay.

[0055] Among them, the high-voltage circuit refers to a circuit used to supply high voltage to the load circuit, and the power battery in the high-voltage circuit is mainly used as a high-voltage power supply. The main positive relay refers to a relay configured at the positive electrode of the power battery. The main negative relay refers to a relay configured at the negative electrode of the power battery.

[0056] During operation, the main controller can control the on and off of the circuit between the power battery and the load circuit by controlling the on and off of the main positive relay and the main negative relay.

[0057] In one embodiment, the present application also provides a troubleshooting method, which is applied to the above Figure 1 The main controller in the high voltage system, such as Figure 4 As shown, the method includes:

[0058] S401, when the power supply circuit in the high-voltage system is pre-charging each high-voltage load in the high-voltage system, after a pre-charging fault is detected, the power supply circuit is troubleshooted, and / or the fault finder in the high-voltage system is controlled to disconnect each pre-charging relay from the corresponding high-voltage load one by one, so as to troubleshoot each load branch.

[0059] In this embodiment, the method for detecting whether a pre-charging failure occurs is as follows: if it is detected that high voltage power-up is unable to be performed, it is determined to be a pre-charging failure.

[0060] In the present application, an optional implementation method for troubleshooting after a pre-charging fault is detected is to troubleshoot the power supply circuit.

[0061] After a pre-charging fault is detected in the present application, another optional implementation method for troubleshooting is to control the fault finder in the high-voltage system to disconnect each pre-charging relay from the corresponding high-voltage load one by one to troubleshoot each load branch.

[0062] After a pre-charging fault is detected in the present application, another optional implementation method for troubleshooting is to troubleshoot the power supply circuit and control the fault finder in the high-voltage system to disconnect each pre-charging relay from the corresponding high-voltage load one by one to troubleshoot each load branch.

[0063] Optionally, an optional implementation method of troubleshooting the power supply circuit in this embodiment is to troubleshoot the power supply circuit according to the high-voltage terminal voltage of the DC converter in the power supply circuit. Specifically, if the high-voltage terminal voltage of the DC converter in the power supply circuit is zero within the first preset time period, it is determined that the DC converter is faulty. Conversely, if the high-voltage terminal voltage of the DC converter in the power supply circuit is not zero within the first preset time period, it is determined that the DC converter is not faulty.

[0064] Optionally, in this embodiment, the fault finder in the high-voltage system is controlled to disconnect the connection between each pre-charge relay and the corresponding high-voltage load one by one to troubleshoot each load branch. An optional implementation method is to control the fault finder in the high-voltage system to disconnect the connection between each pre-charge relay and the corresponding high-voltage load one by one according to the high-voltage terminal voltage of the DC converter in the power supply circuit to troubleshoot each load branch. Specifically, if the rising amplitude of the high-voltage terminal voltage of the DC converter in the power supply circuit is greater than the preset rising amplitude (it may be a short circuit in the high-voltage load of a certain load branch or a short circuit in the connector), or if the high-voltage terminal voltage is less than the preset pre-charge voltage in the third preset period (it may be that the high-voltage load of a certain load branch fails internally or the connector is soaked in water, causing the internal resistance to increase, exceeding the pre-charge capacity of the DC converter), then the fault finder in the high-voltage system is controlled to disconnect the connection between each pre-charge relay and the corresponding high-voltage load one by one to troubleshoot each load branch. Among them, the first preset period, the second preset period and the third preset period refer to pre-configured time periods, and the durations of the first preset period, the second preset period and the third preset period may be the same or different.

[0065] Optionally, in this embodiment, the fault finder in the high-voltage system is controlled to disconnect the connection between each pre-filling relay and the corresponding high-voltage load one by one, and an optional implementation method for troubleshooting each load branch is that for each pre-filling relay, the fault finder in the high-voltage system is controlled to disconnect the connection between the pre-filling relay and the corresponding high-voltage load, and then detect whether the pre-filling fault is eliminated. If it is eliminated, it is determined that the load branch where the pre-filling relay is located has a fault. Exemplarily, for example, if the rising amplitude of the high-voltage terminal voltage of the DC converter in the power supply circuit is greater than the preset rising amplitude within the second preset time period, each pre-filling relay is disconnected one by one. After disconnecting one of the pre-filling relays, there is still a problem that the rising amplitude of the high-voltage terminal voltage of the DC converter in the power supply circuit within the second preset time period is greater than the preset rising amplitude. It is considered that the load branch where the pre-filling relay is located has no fault, and the next pre-filling relay is disconnected until a certain pre-filling relay is disconnected. If the above-mentioned fault does not occur, it is considered that the load branch where the pre-filling relay is located has a fault.

[0066] In this embodiment, in the process of precharging each high-voltage load in the high-voltage system by the power supply circuit in the high-voltage system, after detecting the pre-charging fault, the power supply circuit is troubleshooted, and / or the fault finder in the high-voltage system is controlled to disconnect each pre-charging relay from the corresponding high-voltage load one by one, so as to troubleshoot each load branch. When a pre-charging fault occurs, based on the present application, not only can the power supply circuit be troubleshooted, but also each load branch can be troubleshooted one by one based on the fault finder, without manual participation, which not only saves manpower investment, but also effectively improves the troubleshooting efficiency and the accuracy of the troubleshooting results.

[0067] In one embodiment, if Figure 5 As shown, the present application also provides another optional implementation of a troubleshooting method, including:

[0068] S501, a pre-charging fault is detected during the process in which a power supply circuit in a high-voltage system pre-charges each high-voltage load in the high-voltage system.

[0069] S502: If the voltage at the high voltage end of the DC converter in the power supply circuit is zero within the first preset time period, it is determined that the DC converter fails.

[0070] S503: If the voltage at the high voltage end of the DC converter in the power supply circuit is not zero within the first preset period, it is determined that the DC converter has no fault, and S504 is executed.

[0071] S504, if the rising amplitude of the high-voltage terminal voltage of the DC converter in the power supply circuit is greater than the preset rising amplitude within the second preset time period, or if the high-voltage terminal voltage is less than the preset pre-charge voltage within the third preset time period, then for each pre-charge relay, the fault finder in the high-voltage system is controlled to disconnect the pre-charge relay from the corresponding high-voltage load, and then detect whether the pre-charge fault is eliminated.

[0072] S505: If eliminated, it is determined that the load branch where the pre-charging relay is located is faulty.

[0073] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0074] Based on the same inventive concept, the embodiment of the present application also provides a troubleshooting device for implementing the high-voltage system and method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more embodiments of the troubleshooting device provided below can refer to the limitations of the high-voltage system and method above, and will not be repeated here.

[0075] In one embodiment, if Figure 6As shown, a fault troubleshooting device 1 is provided, comprising: a fault troubleshooting module 10, wherein:

[0076] The fault detection module 10 is used to perform fault detection on the power supply circuit when a pre-charging fault is detected during the process of pre-charging each high-voltage load in the high-voltage system by the power supply circuit in the high-voltage system, and / or control the fault detector in the high-voltage system to disconnect each pre-charging relay from the corresponding high-voltage load one by one, so as to perform fault detection on each load branch.

[0077] In one embodiment, the Figure 6 The troubleshooting module 10 is also specifically used for:

[0078] According to the high-voltage terminal voltage of the DC converter in the power supply circuit, the power supply circuit is troubleshooted, and / or the fault finder in the high-voltage system is controlled to disconnect each pre-charge relay from the corresponding high-voltage load one by one to troubleshoot each load branch.

[0079] In one embodiment, the Figure 6 The troubleshooting module 10 is also specifically used for:

[0080] If the voltage at the high voltage end of the DC converter in the power supply circuit is zero within the first preset time period, it is determined that the DC converter fails.

[0081] In one embodiment, the Figure 6 The troubleshooting module 10 is also specifically used for:

[0082] If the rising amplitude of the high-voltage terminal voltage of the DC converter in the power supply circuit is greater than the preset rising amplitude within the second preset time period, or if the high-voltage terminal voltage is less than the preset pre-charge voltage within the third preset time period, the fault finder in the high-voltage system is controlled to disconnect each pre-charge relay from the corresponding high-voltage load one by one to perform fault finding on each load branch.

[0083] In one embodiment, the Figure 6 The troubleshooting module 10 is also specifically used for:

[0084] For each pre-charging relay, a fault detector in the high-voltage system is controlled to disconnect the pre-charging relay from the corresponding high-voltage load, and then detect whether the pre-charging fault is eliminated;

[0085] If it is eliminated, it is determined that the load branch where the pre-charging relay is located is faulty.

[0086] Each module in the above-mentioned troubleshooting device can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0087] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 7 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store voltage-related data of each device of the high-voltage system. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a high-voltage system and method are implemented.

[0088] Those skilled in the art will understand that Figure 7 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0089] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0090] During the process of pre-charging each high-voltage load in the high-voltage system by the power supply circuit in the high-voltage system, after a pre-charging fault is detected, the power supply circuit is troubleshooted, and / or the fault finder in the high-voltage system is controlled to disconnect each pre-charging relay from the corresponding high-voltage load one by one, so as to troubleshoot each load branch.

[0091] In one embodiment, when the processor executes the computer program, the following steps are further implemented: troubleshooting the power supply circuit, and / or controlling the troubleshooter in the high-voltage system to disconnect each pre-charge relay from the corresponding high-voltage load one by one, so as to troubleshoot each load branch, including:

[0092] According to the high-voltage terminal voltage of the DC converter in the power supply circuit, the power supply circuit is troubleshooted, and / or the fault finder in the high-voltage system is controlled to disconnect each pre-charge relay from the corresponding high-voltage load one by one to troubleshoot each load branch.

[0093] In one embodiment, when the processor executes the computer program, the following steps are further implemented: troubleshooting the power supply circuit according to the high voltage terminal voltage of the DC converter in the power supply circuit, including:

[0094] If the voltage at the high voltage end of the DC converter in the power supply circuit is zero within the first preset time period, it is determined that the DC converter fails.

[0095] In one embodiment, when the processor executes the computer program, the following steps are further implemented: according to the high voltage terminal voltage of the DC converter in the power supply circuit, the fault finder in the high voltage system is controlled to disconnect each pre-charge relay from the corresponding high voltage load one by one to perform fault finder on each load branch, including:

[0096] If the rising amplitude of the high-voltage terminal voltage of the DC converter in the power supply circuit is greater than the preset rising amplitude within the second preset time period, or if the high-voltage terminal voltage is less than the preset pre-charge voltage within the third preset time period, the fault finder in the high-voltage system is controlled to disconnect each pre-charge relay from the corresponding high-voltage load one by one to perform fault finding on each load branch.

[0097] In one embodiment, when the processor executes the computer program, the following steps are further implemented: controlling the fault finder in the high-voltage system to disconnect each pre-charge relay from the corresponding high-voltage load one by one to perform fault finder on each load branch, including:

[0098] For each pre-charging relay, a fault detector in the high-voltage system is controlled to disconnect the pre-charging relay from the corresponding high-voltage load, and then detect whether the pre-charging fault is eliminated;

[0099] If it is eliminated, it is determined that the load branch where the pre-charging relay is located is faulty.

[0100] In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0101] During the process of pre-charging each high-voltage load in the high-voltage system by the power supply circuit in the high-voltage system, after a pre-charging fault is detected, the power supply circuit is troubleshooted, and / or the fault finder in the high-voltage system is controlled to disconnect each pre-charging relay from the corresponding high-voltage load one by one, so as to troubleshoot each load branch.

[0102] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: troubleshooting the power supply circuit, and / or controlling the troubleshooter in the high-voltage system to disconnect each pre-charge relay from the corresponding high-voltage load one by one, so as to troubleshoot each load branch, including:

[0103] According to the high-voltage terminal voltage of the DC converter in the power supply circuit, the power supply circuit is troubleshooted, and / or the fault finder in the high-voltage system is controlled to disconnect each pre-charge relay from the corresponding high-voltage load one by one to troubleshoot each load branch.

[0104] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: troubleshooting the power supply circuit according to the high voltage terminal voltage of the DC converter in the power supply circuit, including:

[0105] If the voltage at the high voltage end of the DC converter in the power supply circuit is zero within the first preset time period, it is determined that the DC converter fails.

[0106] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: according to the high voltage terminal voltage of the DC converter in the power supply circuit, the fault detector in the high voltage system is controlled to disconnect each pre-charge relay from the corresponding high voltage load one by one, so as to perform fault detection on each load branch, including:

[0107] If the rising amplitude of the high-voltage terminal voltage of the DC converter in the power supply circuit is greater than the preset rising amplitude within the second preset time period, or if the high-voltage terminal voltage is less than the preset pre-charge voltage within the third preset time period, the fault finder in the high-voltage system is controlled to disconnect each pre-charge relay from the corresponding high-voltage load one by one to perform fault finding on each load branch.

[0108] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: controlling the fault finder in the high-voltage system to disconnect each pre-charge relay from the corresponding high-voltage load one by one to perform fault finder on each load branch, including:

[0109] For each pre-charging relay, a fault detector in the high-voltage system is controlled to disconnect the pre-charging relay from the corresponding high-voltage load, and then detect whether the pre-charging fault is eliminated;

[0110] If it is eliminated, it is determined that the load branch where the pre-charging relay is located is faulty.

[0111] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0112] During the process of pre-charging each high-voltage load in the high-voltage system by the power supply circuit in the high-voltage system, after a pre-charging fault is detected, the power supply circuit is troubleshooted, and / or the fault finder in the high-voltage system is controlled to disconnect each pre-charging relay from the corresponding high-voltage load one by one, so as to troubleshoot each load branch.

[0113] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: troubleshooting the power supply circuit, and / or controlling the troubleshooter in the high-voltage system to disconnect each pre-charge relay from the corresponding high-voltage load one by one, so as to troubleshoot each load branch, including:

[0114] According to the high-voltage terminal voltage of the DC converter in the power supply circuit, the power supply circuit is troubleshooted, and / or the fault finder in the high-voltage system is controlled to disconnect each pre-charge relay from the corresponding high-voltage load one by one to troubleshoot each load branch.

[0115] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: troubleshooting the power supply circuit according to the high voltage terminal voltage of the DC converter in the power supply circuit, including:

[0116] If the voltage at the high voltage end of the DC converter in the power supply circuit is zero within the first preset time period, it is determined that the DC converter fails.

[0117] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: according to the high voltage terminal voltage of the DC converter in the power supply circuit, the fault detector in the high voltage system is controlled to disconnect each pre-charge relay from the corresponding high voltage load one by one, so as to perform fault detection on each load branch, including:

[0118] If the rising amplitude of the high-voltage terminal voltage of the DC converter in the power supply circuit is greater than the preset rising amplitude within the second preset time period, or if the high-voltage terminal voltage is less than the preset pre-charge voltage within the third preset time period, the fault finder in the high-voltage system is controlled to disconnect each pre-charge relay from the corresponding high-voltage load one by one to perform fault finding on each load branch.

[0119] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: controlling the fault finder in the high-voltage system to disconnect each pre-charge relay from the corresponding high-voltage load one by one to perform fault finder on each load branch, including:

[0120] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: after controlling the fault finder in the high-voltage system to disconnect the pre-charge relay from the corresponding high-voltage load, detecting whether the pre-charge fault is eliminated;

[0121] If it is eliminated, it is determined that the load branch where the pre-charging relay is located is faulty.

[0122] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0123] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0124] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A high-voltage system, characterized in that: include: A main controller, a troubleshooter, a load circuit, and a power supply circuit for supplying power to the load circuit; Wherein, the load circuit includes at least one load branch, different load branches are connected in parallel with each other, each load branch includes a high-voltage load and a pre-charge relay connected to the positive electrode of the high-voltage load, and the pre-charge relay is connected to the fault detector; The fault troubleshooter and the power supply circuit are both connected to the main controller; The main controller is used to perform troubleshooting on the power supply circuit after detecting a pre-charging fault during the process of the power supply circuit pre-charging each high-voltage load, and / or control the fault finder to disconnect each pre-charging relay from the corresponding high-voltage load one by one to perform troubleshooting on each load branch.

2. The system according to claim 1, characterized in that The power supply circuit includes a pre-charging circuit for pre-charging each high-voltage load; The pre-charging circuit includes a DC converter and a low-voltage battery connected to the low-voltage end of the DC converter; The DC converter and each load branch form a pre-charging loop; The low-voltage battery is used to supply power to the pre-charging circuit through the DC converter.

3. The system according to claim 2, characterized in that The high voltage end of the DC converter is connected to each pre-charging relay, and the negative electrode of the DC converter is connected to the negative electrode of each high voltage load.

4. The system according to claim 1, characterized in that The power supply circuit includes a high-voltage circuit for supplying power to each high-voltage load; The high-voltage circuit and each load branch form a high-voltage loop.

5. The system according to claim 4, characterized in that The high voltage circuit includes a power battery, a main positive relay and a main negative relay; The positive electrode of the power battery is connected to each pre-charging relay through the main positive relay; the negative electrode of the power battery is connected to the negative electrode of each high-voltage load through the main negative relay.

6. A troubleshooting method, characterized in that: A main controller used in a high voltage system according to any one of claims 1 to 5, comprising: During the process of pre-charging each high-voltage load in the high-voltage system by the power supply circuit in the high-voltage system, after a pre-charging fault is detected, the power supply circuit is troubleshooted, and / or the fault finder in the high-voltage system is controlled to disconnect each pre-charging relay from the corresponding high-voltage load one by one, so as to troubleshoot each load branch.

7. The method according to claim 6, characterized in that The troubleshooting of the power supply circuit and / or controlling the troubleshooter in the high-voltage system to disconnect each pre-charge relay from the corresponding high-voltage load one by one to troubleshoot each load branch includes: According to the high-voltage terminal voltage of the DC converter in the power supply circuit, the power supply circuit is troubleshooted, and / or the fault finder in the high-voltage system is controlled to disconnect each pre-charging relay from the corresponding high-voltage load one by one to troubleshoot each load branch.

8. The method according to claim 7, characterized in that The troubleshooting of the power supply circuit according to the high voltage terminal voltage of the DC converter in the power supply circuit comprises: If the voltage at the high voltage end of the DC converter in the power supply circuit is zero within the first preset time period, it is determined that the DC converter fails.

9. The method according to claim 7, characterized in that: According to the high-voltage terminal voltage of the DC converter in the power supply circuit, controlling the fault detector in the high-voltage system to disconnect each pre-charge relay from the corresponding high-voltage load one by one to perform fault detection on each load branch includes: If the rising amplitude of the high-voltage terminal voltage of the DC converter in the power supply circuit is greater than the preset rising amplitude within the second preset time period, or if the high-voltage terminal voltage is less than the preset pre-charge voltage within the third preset time period, the fault finder in the high-voltage system is controlled to disconnect each pre-charge relay from the corresponding high-voltage load one by one to perform fault finding on each load branch.

10. The method according to claim 9, characterized in that The controlling the fault finder in the high-voltage system to disconnect each pre-charge relay from the corresponding high-voltage load one by one to perform fault finding on each load branch includes: For each pre-charging relay, controlling the fault detector in the high-voltage system to disconnect the pre-charging relay from the corresponding high-voltage load, and then detecting whether the pre-charging fault is eliminated; If eliminated, it is determined that the load branch where the pre-charging relay is located is faulty.

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