A method and system for handling high voltage faults

Abstract

The application provides a high-voltage fault processing method and system, and relates to the technical field of electric vehicles. The high-voltage fault processing method comprises the following steps: obtaining current detection information of an electric vehicle, wherein each component of the electric vehicle is provided with a current detector and a on-off unit, and the current of each component of the electric vehicle is detected through the current detector; obtaining fault information of the electric vehicle according to the current detection information; generating fault processing strategy data according to the current detection information and the fault information, and controlling the on-off of the on-off unit according to the fault processing strategy data. The high-voltage fault processing method can achieve the technical effects of identifying faults and improving maintenance efficiency.

Description

Technical Field

[0001] This application relates to the field of electric vehicle technology, and more specifically, to a method and system for handling high-voltage faults. Background Technology

[0002] Electric vehicles mostly use high-voltage systems with rated voltages above 300 volts. When high-voltage components disconnect, the exposed high-voltage electricity can cause serious harm to the human body. Generally, electric vehicles are designed with high-voltage fuses. When a high-voltage component short-circuits, the high-voltage fuse blows to protect the entire high-voltage circuit and isolate the short-circuit fault, preventing the fault from worsening and causing system risks.

[0003] In existing technologies, due to design limitations, a single high-voltage fuse may simultaneously protect multiple high-voltage components. When a short-circuit fault occurs and the high-voltage fuse blows, maintenance personnel find it difficult to quickly locate the fault point or area, thus increasing the workload and time-consuming nature of repairs. Furthermore, some short-circuit faults are low-current short circuits (i.e., the short-circuit current is small enough to trigger the high-voltage fuse to blow, or the high-voltage fuse takes a long time to blow), or what may be called leakage current faults. In such cases, the high-voltage fuse cannot effectively blow to isolate the fault area, and as the fault continues, it will cause the fault to worsen further, for example, the fault point or contact object will continue to heat up, eventually leading to combustion, fire, or smoke. Summary of the Invention

[0004] The purpose of this application is to provide a method, system, electronic device, and computer-readable storage medium for handling high-voltage faults, which can achieve the technical effects of fault identification and improved maintenance efficiency.

[0005] Firstly, this application provides a method for handling high-voltage faults, including: Acquire current detection information of electric vehicle, wherein each component of electric vehicle is equipped with a current detector and a switching unit, and the current of each component of electric vehicle is detected by the current detector; The fault information of the electric vehicle is obtained based on the current detection information; Based on the current detection information and the fault information, fault handling strategy data is generated, and the on / off state of the switching unit is controlled according to the fault handling strategy data.

[0006] In the above implementation process, by adding current detectors and switching units to each component in the high-voltage circuit of the electric vehicle, the current detectors obtain the detected current information, and the fault and fault area are quickly identified through the detected current information; and fault handling strategy data is generated based on the fault information to obtain fault prompts and maintenance prompts. The switching of the switching unit is controlled according to the fault handling strategy data to ensure the user's vehicle safety and experience, and to reduce the workload of maintenance personnel. Thus, this high-voltage fault handling method can achieve the technical effects of fault identification and improved maintenance efficiency.

[0007] Further, the electric vehicle includes a power battery, a high-voltage junction box connected to the power battery, and an on-board charger, a DC-DC converter, an air conditioning heater, and an air conditioning compressor respectively connected to the high-voltage junction box. The step of generating fault handling strategy data based on the current detection information and the fault information includes: Acquire the second current detection information of the high-voltage junction box, the fifth current detection information of the on-board charger, the sixth current detection information of the DC converter, the seventh current detection information of the air conditioner heater, and the eighth current detection information of the air conditioner compressor; The total current value is generated based on the fifth, sixth, seventh, and eighth current detection information. If the fifth, sixth, seventh, and eighth current detection information are all zero, the difference between the second current detection information and the total current value is less than or equal to the first current threshold, and the duration is greater than the first time threshold, then bus box short circuit fault data is generated. If the difference between the second current detection information and the total current value is greater than the first current threshold and the duration is greater than the second time threshold, bus box leakage fault data is generated, and the power battery switching unit is disconnected.

[0008] In the above implementation process, by analyzing the data of each detected current in the high-voltage bus box, if the fifth, sixth, seventh, and eighth current detection information are all zero, and the difference between the second current detection information and the total current value is less than or equal to the first current threshold, it indicates that the high-voltage bus box or connecting harness is suspected of having a short circuit fault, and bus box short circuit fault data is generated; if the difference between the second current detection information and the total current value is greater than the first current threshold, and the duration is greater than the second time threshold, it indicates that the high-voltage bus box or connecting harness is suspected of having a leakage fault, bus box leakage fault data is generated, and the power battery switching unit needs to be disconnected to avoid circuit burnout.

[0009] Furthermore, the electric vehicle also includes an electric drive connected to the power battery, and the step of generating fault handling strategy data based on the current detection information and the fault information further includes: The operating condition information of the electric vehicle, as well as the electric drive current information and the third current detection information of the electric drive are obtained. If the electric vehicle is in driving condition, the electric drive current information is zero, the difference between the electric drive current information and the third current detection information is less than or equal to the second current threshold, and the duration is greater than the third time threshold, then electric drive short circuit fault data is generated. If the difference between the electric drive current information and the third current detection information is greater than the second current threshold and the duration is greater than the fourth time threshold, then electric drive leakage fault data is generated, and the power battery switching unit is disconnected.

[0010] In the above implementation process, differential analysis is performed for different operating conditions of electric vehicles: if the electric vehicle is in driving condition, the electric drive current information is zero, and the difference between the electric drive current information and the third current detection information is less than or equal to the second current threshold, it indicates that the electric drive or connecting harness is suspected to have a short circuit fault, and electric drive short circuit fault data is generated; if under any operating condition, the difference between the electric drive current information and the third current detection information is greater than the second current threshold, it indicates that the electric drive or connecting harness is suspected to have a leakage fault, electric drive leakage fault data is generated, and the power battery switching unit needs to be disconnected to avoid circuit burnout.

[0011] Furthermore, the electric vehicle also includes a DC charging port connected to the power battery, and the step of generating fault handling strategy data based on the current detection information and the fault information further includes: Obtain the fourth detection current information of the DC charging port; If the electric vehicle is in DC charging mode, and the difference between the output current of the charging pile and the fourth detection current information is greater than the third current threshold and the duration is greater than the fifth time threshold, DC charging port leakage fault data is generated, and the DC charging port switching unit is disconnected.

[0012] In the above implementation process, data analysis is performed on electric vehicles under DC charging conditions: if the electric vehicle is under DC charging conditions and the difference between the output current of the charging pile and the fourth detection current information is greater than the third current threshold, it indicates that the DC charging port or connecting harness is suspected of having a leakage fault. DC charging port leakage fault data is generated, and the on / off unit of the DC charging port needs to be disconnected to avoid circuit burnout.

[0013] Furthermore, the step of generating fault handling strategy data based on the current detection information and the fault information further includes: Obtain the charging current information of the on-board charger; If the electric vehicle is in AC charging mode, the charging current information is zero, and the difference between the fifth current detection information and the charging current information is less than or equal to the fourth current threshold and the duration is greater than the sixth time threshold, then the on-board charger short circuit fault data is generated. If the difference between the fifth current detection information and the charging current information is greater than the fourth current threshold and the duration is greater than the seventh time threshold, the on-board charger leakage fault data is generated, and the on-board charger's switching unit is disconnected.

[0014] In the above implementation process, different analyses are performed for different operating conditions of electric vehicles: if the electric vehicle is in AC charging mode, the charging current information is zero, and the difference between the fifth current detection information and the charging current information is less than or equal to the fourth current threshold, it indicates that the on-board charger or connecting harness is suspected of having a short circuit fault, and on-board charger short circuit fault data is generated; if, under any operating condition, the difference between the fifth current detection information and the charging current information is greater than the fourth current threshold, it indicates that the on-board charger or connecting harness is suspected of having a leakage fault, and on-board charger leakage fault data is generated, and the on-off unit of the on-board charger needs to be disconnected to avoid circuit burnout.

[0015] Furthermore, the step of generating fault handling strategy data based on the current detection information and the fault information further includes: Obtain the DC-DC converter current information of the DC-DC converter; If the DC-DC converter current information is zero, and the difference between the sixth current detection information and the DC-DC converter current information is less than or equal to the fifth current threshold and the duration is greater than the eighth time threshold, DC-DC converter short-circuit fault data is generated. If the difference between the sixth current detection information and the DC-DC converter current information is greater than the fifth current threshold and the duration is greater than the ninth time threshold, DC-DC converter leakage fault data is generated, and the DC-DC converter switching unit is disconnected.

[0016] In the above implementation process, if the DC conversion current information is zero and the difference between the sixth current detection information and the DC conversion current information is less than or equal to the fifth current threshold, it indicates that the DC converter or connecting harness is suspected of having a short circuit fault, and DC converter short circuit fault data is generated; if, under any operating condition, the difference between the sixth current detection information and the DC conversion current information is greater than the fifth current threshold, it indicates that the DC converter or connecting harness is suspected of having a leakage fault, DC converter leakage fault data is generated, and the DC converter's switching unit needs to be disconnected to avoid circuit burnout.

[0017] Furthermore, the step of generating fault handling strategy data based on the current detection information and the fault information further includes: Obtain the air conditioning heating current information of the air conditioning heater; If the electric vehicle turns on the air conditioning heater, the air conditioning heating current information is zero, the difference between the air conditioning heating current information and the seventh current detection information is less than or equal to the sixth current threshold, and the duration is greater than the tenth time threshold, then air conditioning heater short circuit fault data is generated. If the difference between the air conditioner heating current information and the seventh current detection information is greater than the sixth current threshold and the duration is greater than the eleventh time threshold, then air conditioner heater leakage fault data is generated, and the air conditioner heater on / off unit is disconnected.

[0018] In the above implementation process, when the air conditioning heater of the electric vehicle is turned on, if the air conditioning heating current information is zero and the difference between the air conditioning heating current information and the seventh current detection information is less than or equal to the sixth current threshold, it indicates that the air conditioning heater or connecting harness is suspected of having a short circuit fault, and air conditioning heater short circuit fault data is generated; if under any operating condition, the difference between the air conditioning heating current information and the seventh current detection information is greater than the sixth current threshold, it indicates that the air conditioning heater or connecting harness is suspected of having a leakage fault, air conditioning heater leakage fault data is generated, and the air conditioning heater switching unit needs to be disconnected to avoid circuit burnout.

[0019] Furthermore, the step of generating fault handling strategy data based on the current detection information and the fault information further includes: Obtain the air conditioning compressor current information of the air conditioning compressor; If the electric vehicle turns on the air conditioning compressor, the air conditioning compressor current information is zero, the difference between the air conditioning compressor current information and the eighth current detection information is less than or equal to the seventh current threshold, and the duration is greater than the twelfth time threshold, then air conditioning compressor short circuit fault data is generated. If the difference between the air conditioner compressor current information and the eighth current detection information is greater than the seventh current threshold and the duration is greater than the thirteenth time threshold, then air conditioner compressor leakage fault data is generated, and the air conditioner compressor on / off unit is disconnected.

[0020] In the above implementation process, when the air conditioning compressor of an electric vehicle is turned on, if the air conditioning compressor current information is zero and the difference between the air conditioning compressor current information and the eighth current detection information is less than or equal to the seventh current threshold, it indicates that the air conditioning compressor or connecting harness is suspected of having a short circuit fault, and air conditioning compressor short circuit fault data is generated; if, under any operating condition, the difference between the air conditioning compressor current information and the eighth current detection information is greater than the seventh current threshold, it indicates that the air conditioning compressor or connecting harness is suspected of having a leakage fault, air conditioning compressor leakage fault data is generated, and the air conditioning compressor switching unit needs to be disconnected to avoid circuit burnout.

[0021] Secondly, this application provides a high-voltage fault handling system, comprising: An acquisition module is used to acquire current detection information of an electric vehicle. Each component of the electric vehicle is equipped with a current detector and a switching unit, and the current of each component of the electric vehicle is detected by the current detector. The fault module is used to obtain fault information of the electric vehicle based on the current detection information. The strategy module is used to generate fault handling strategy data based on the current detection information and the fault information, and to control the on / off state of the switching unit according to the fault handling strategy data.

[0022] Furthermore, the electric vehicle includes a power battery, a high-voltage junction box connected to the power battery, and an on-board charger, a DC-DC converter, an air conditioning heater, and an air conditioning compressor respectively connected to the high-voltage junction box. The strategy module is also used for: Acquire the second current detection information of the high-voltage junction box, the fifth current detection information of the on-board charger, the sixth current detection information of the DC converter, the seventh current detection information of the air conditioner heater, and the eighth current detection information of the air conditioner compressor; The total current value is generated based on the fifth, sixth, seventh, and eighth current detection information. If the fifth, sixth, seventh, and eighth current detection information are all zero, the difference between the second current detection information and the total current value is less than or equal to the first current threshold, and the duration is greater than the first time threshold, then bus box short circuit fault data is generated. If the difference between the second current detection information and the total current value is greater than the first current threshold and the duration is greater than the second time threshold, bus box leakage fault data is generated, and the power battery switching unit is disconnected.

[0023] Furthermore, the electric vehicle also includes an electric drive connected to the power battery, and the strategy module is further used for: The operating condition information of the electric vehicle, as well as the electric drive current information and the third current detection information of the electric drive are obtained. If the electric vehicle is in driving condition, the electric drive current information is zero, the difference between the electric drive current information and the third current detection information is less than or equal to the second current threshold, and the duration is greater than the third time threshold, then electric drive short circuit fault data is generated. If the difference between the electric drive current information and the third current detection information is greater than the second current threshold and the duration is greater than the fourth time threshold, then electric drive leakage fault data is generated, and the power battery switching unit is disconnected.

[0024] Furthermore, the electric vehicle also includes a DC charging port connected to the power battery, and the strategy module is further used for: Obtain the fourth detection current information of the DC charging port; If the electric vehicle is in DC charging mode, and the difference between the output current of the charging pile and the fourth detection current information is greater than the third current threshold and the duration is greater than the fifth time threshold, DC charging port leakage fault data is generated, and the DC charging port switching unit is disconnected.

[0025] Furthermore, the strategy module is also used for: Obtain the charging current information of the on-board charger; If the electric vehicle is in AC charging mode, the charging current information is zero, and the difference between the fifth current detection information and the charging current information is less than or equal to the fourth current threshold and the duration is greater than the sixth time threshold, then the on-board charger short circuit fault data is generated. If the difference between the fifth current detection information and the charging current information is greater than the fourth current threshold and the duration is greater than the seventh time threshold, the on-board charger leakage fault data is generated, and the on-board charger's switching unit is disconnected.

[0026] Furthermore, the strategy module is also used for: Obtain the DC-DC converter current information of the DC-DC converter; If the DC-DC converter current information is zero, and the difference between the sixth current detection information and the DC-DC converter current information is less than or equal to the fifth current threshold and the duration is greater than the eighth time threshold, DC-DC converter short-circuit fault data is generated. If the difference between the sixth current detection information and the DC-DC converter current information is greater than the fifth current threshold and the duration is greater than the ninth time threshold, DC-DC converter leakage fault data is generated, and the DC-DC converter switching unit is disconnected.

[0027] Furthermore, the strategy module is also used for: Obtain the air conditioning heating current information of the air conditioning heater; If the electric vehicle turns on the air conditioning heater, the air conditioning heating current information is zero, the difference between the air conditioning heating current information and the seventh current detection information is less than or equal to the sixth current threshold, and the duration is greater than the tenth time threshold, then air conditioning heater short circuit fault data is generated. If the difference between the air conditioner heating current information and the seventh current detection information is greater than the sixth current threshold and the duration is greater than the eleventh time threshold, then air conditioner heater leakage fault data is generated, and the air conditioner heater on / off unit is disconnected.

[0028] Furthermore, the strategy module is also used for: Obtain the air conditioning compressor current information of the air conditioning compressor; If the electric vehicle turns on the air conditioning compressor, the air conditioning compressor current information is zero, the difference between the air conditioning compressor current information and the eighth current detection information is less than or equal to the seventh current threshold, and the duration is greater than the twelfth time threshold, then air conditioning compressor short circuit fault data is generated. If the difference between the air conditioner compressor current information and the eighth current detection information is greater than the seventh current threshold and the duration is greater than the thirteenth time threshold, then air conditioner compressor leakage fault data is generated, and the air conditioner compressor on / off unit is disconnected.

[0029] Thirdly, this application provides an electronic device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of the method described in any of the first aspects.

[0030] Fourthly, this application provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the method described in any of the first aspects.

[0031] Fifthly, this application provides a computer program product that, when run on a computer, causes the computer to perform the method described in any of the first aspects.

[0032] Other features and advantages disclosed in this application will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the above-described technology disclosed in this application.

[0033] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the high-voltage circuit of an electric vehicle provided in an embodiment of this application; Figure 2 A flowchart illustrating a high-voltage fault handling method provided in an embodiment of this application; Figure 3A schematic diagram of the testing process for a high-voltage busbar box provided in an embodiment of this application; Figure 4 A schematic diagram of the detection process for an electric drive provided in an embodiment of this application; Figure 5 A schematic diagram of the detection process for a DC charging port provided in an embodiment of this application; Figure 6 A schematic diagram of the detection process for an on-board charger provided in an embodiment of this application; Figure 7 This is a schematic diagram of the detection process of a DC-DC converter provided in an embodiment of this application; Figure 8 A schematic diagram of the testing process for an air conditioner heater provided in an embodiment of this application; Figure 9 A schematic diagram of the testing process for an air conditioner compressor provided in an embodiment of this application; Figure 10 A structural block diagram of a high-voltage fault handling system provided in an embodiment of this application; Figure 11 This is a structural block diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0036] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0037] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] Generally, electric vehicles are designed with high-voltage fuses. When a high-voltage component short-circuits, the fuse blows to protect the entire high-voltage circuit, isolating the short-circuit fault and preventing it from worsening and causing system risks. However, current circuit designs in electric vehicles have drawbacks: 1. Due to design reasons, one high-voltage fuse may protect multiple high-voltage components at the same time. When a short circuit fault occurs and the high-voltage fuse blows, it is difficult for maintenance personnel to quickly locate the fault point or fault area, which in turn increases the workload of maintenance and is time-consuming and labor-intensive. Second, some short circuit faults are low-current short circuits (i.e., the short circuit current is small and insufficient to trigger the high-voltage fuse to blow; or the high-voltage fuse blows for a long time), or they are called leakage current faults. In such faults, the high-voltage fuse cannot effectively blow to isolate the fault area. As the fault continues, it will cause the fault to worsen. For example, the fault point or contact object will continue to heat up, and then burn or smoke. To address the aforementioned technical problems, embodiments of this application provide a method, system, electronic device, and computer-readable storage medium for handling high-voltage faults. This method adds current detectors and switching units to various components in the high-voltage circuit of an electric vehicle. The current detectors obtain current information, which is then used to quickly identify faults and fault areas. Based on the fault information, fault handling strategy data is generated to obtain fault prompts and maintenance suggestions. The switching units are controlled according to the fault handling strategy data to ensure user safety and experience, and to reduce the workload of maintenance personnel. Therefore, this high-voltage fault handling method can achieve the technical effects of fault identification and improved maintenance efficiency.

[0039] Please see Figure 1 , Figure 1 This is a schematic diagram of the high-voltage circuit of an electric vehicle provided in an embodiment of this application; the electric vehicle includes a power battery, a high-voltage junction box (PDU), an electric drive unit (DCU), a DC charging port, and an on-board charger (OBC), a DC-DC converter (DCDC), an air conditioning heater (PTC), and an air conditioning compressor (ECP) respectively connected to the high-voltage junction box.

[0040] The power battery is connected to the high-voltage junction box, electric drive, and DC charging port respectively. For the sake of simplified diagram, K represents the switching unit, that is, one or a group of high-voltage relays or electronic units that can control the switching of the high-voltage circuit. For example: K1 controls the main positive output, K2 controls fast charging, K3 controls the OBC operation, K4 controls the DC-DC operation, K5 controls the PTC operation, and K6 controls the ECP operation, etc.

[0041] For example, each high-voltage component is protected by a corresponding high-voltage fuse (Fuse 1~6).

[0042] For example, each high-voltage component in an electric vehicle has a current sampling point ( Figure 1 (Not marked in the text) When a component is working, it will report the current sampling value to the communication network; for example, OBC, DCDC, PTC, ECP, and DCU will all report their respective sampling current values. The DC charging port is a physical socket, not a controller, and cannot report current sampling values; during DC charging, the DC current input from the charging pile to the vehicle is obtained through interaction with the DC charging station; the corresponding description is as follows: The current value sampled at current detection point 1: I1; The current value sampled at current detection point 2: I2; The current value sampled at current detection point 3 is I3; The current value sampled at current detection point 4 is I4; The current value sampled at current detection point 5 is I5; The current value sampled at current detection point 6 is I6; Current value sampled at current detection point 7: I7 The current value sampled at current detection point 8 is I8.

[0043] Please see Figure 2 , Figure 2 This is a flowchart illustrating a high-voltage fault handling method provided in an embodiment of this application. The high-voltage fault handling method includes the following steps: S100: Acquire current detection information of electric vehicle, wherein each component of electric vehicle is equipped with current detector and switching unit, and the current of each component of electric vehicle is detected by the current detector. S200: Obtains fault information of electric vehicles based on current detection information; S300: Based on current detection information and fault information, generate fault handling strategy data, and control the on / off state of the switching unit according to the fault handling strategy data.

[0044] For example, combined Figure 1 As shown, the components of an electric vehicle include a power battery, an on-board charger, a DC-DC converter, an air conditioning heater, and an air conditioning compressor. By setting current detectors on each component of the electric vehicle, the current in the detection circuit can be obtained, i.e., current detection information. It should be noted that the current of each component of the electric vehicle itself can be obtained through its own current sensor, such as the current of the on-board charger or the current of the DC-DC converter itself.

[0045] For example, by analyzing data from multiple current detection information on the high-voltage circuit of an electric vehicle, circuit faults and fault areas can be accurately determined and quickly identified.

[0046] For example, fault handling strategy data is generated based on fault information to obtain fault prompts and maintenance prompts. Then, the on / off state of the switching unit is controlled based on the fault handling strategy data to prevent the circuit from being abnormally damaged.

[0047] The high-voltage fault handling method provided in this application adds current detectors and switching units to each component in the high-voltage circuit of an electric vehicle. The current detectors obtain current information, which is then used to quickly identify faults and fault areas. Fault handling strategy data is generated based on the fault information to obtain fault prompts and maintenance suggestions. The switching units are controlled according to the fault handling strategy data to ensure user safety and experience, and to reduce the workload of maintenance personnel. Therefore, this high-voltage fault handling method can achieve the technical effects of fault identification and improved maintenance efficiency.

[0048] In some embodiments, the electric vehicle includes a power battery, a high-voltage junction box connected to the power battery, and an on-board charger, a DC-DC converter, an air conditioning heater, and an air conditioning compressor respectively connected to the high-voltage junction box. The step of generating fault handling strategy data based on current detection information and fault information includes: Acquire the second current detection information of the high-voltage junction box, the fifth current detection information of the on-board charger, the sixth current detection information of the DC converter, the seventh current detection information of the air conditioner heater, and the eighth current detection information of the air conditioner compressor; The total current value is generated based on the fifth, sixth, seventh, and eighth current detection information. If the fifth, sixth, seventh, and eighth current detection information are all zero, the difference between the second current detection information and the total current value is less than or equal to the first current threshold, and the duration is greater than the first time threshold, then bus box short circuit fault data is generated. If the difference between the second current detection information and the total current value is greater than the first current threshold and the duration is greater than the second time threshold, bus box leakage fault data is generated, and the power battery switching unit is disconnected.

[0049] For example, by analyzing the data of each detected current in the high-voltage busbar box, if the fifth, sixth, seventh, and eighth current detection information are all zero, and the difference between the second current detection information and the total current value is less than or equal to the first current threshold, it indicates that the high-voltage busbar box or connecting harness is suspected of having a short circuit fault, and busbar box short circuit fault data is generated; if the difference between the second current detection information and the total current value is greater than the first current threshold, and the duration is greater than the second time threshold, it indicates that the high-voltage busbar box or connecting harness is suspected of having a leakage fault, busbar box leakage fault data is generated, and the power battery switching unit needs to be disconnected to avoid circuit burnout.

[0050] In some embodiments, the electric vehicle also includes an electric drive connected to the power battery, and the step of generating fault handling strategy data based on current detection information and fault information further includes: Acquire operating condition information of electric vehicles, as well as electric drive current information and third current detection information; If the electric vehicle is in driving condition, the electric drive current information is zero, the difference between the electric drive current information and the third current detection information is less than or equal to the second current threshold, and the duration is greater than the third time threshold, then electric drive short circuit fault data is generated. If the difference between the electric drive current information and the third current detection information is greater than the second current threshold and the duration is greater than the fourth time threshold, then electric drive leakage fault data is generated, and the power battery switching unit is disconnected.

[0051] For example, differential analysis is performed for different operating conditions of electric vehicles: if the electric vehicle is in driving condition, the electric drive current information is zero, and the difference between the electric drive current information and the third current detection information is less than or equal to the second current threshold, it indicates that the electric drive or connecting harness is suspected to have a short circuit fault, and electric drive short circuit fault data is generated; if under any operating condition, the difference between the electric drive current information and the third current detection information is greater than the second current threshold, it indicates that the electric drive or connecting harness is suspected to have a leakage fault, electric drive leakage fault data is generated, and the power battery switching unit needs to be disconnected to avoid circuit burnout.

[0052] In some embodiments, the electric vehicle also includes a DC charging port connected to the power battery, and the step of generating fault handling strategy data based on current detection information and fault information further includes: Obtain the fourth detection current information of the DC charging port; If the electric vehicle is in DC charging mode, and the difference between the output current of the charging pile and the fourth detection current information is greater than the third current threshold and the duration is greater than the fifth time threshold, DC charging port leakage fault data is generated, and the DC charging port switching unit is disconnected.

[0053] For example, data analysis is performed on electric vehicles in DC charging mode: if the electric vehicle is in DC charging mode and the difference between the output current of the charging pile and the fourth detection current information is greater than the third current threshold, it indicates that the DC charging port or connecting harness is suspected of having a leakage fault. DC charging port leakage fault data is generated, and the on / off unit of the DC charging port needs to be disconnected to avoid circuit burnout.

[0054] In some implementations, the step of generating fault handling strategy data based on current detection information and fault information further includes: Obtain the charging current information of the on-board charger; If the electric vehicle is in AC charging mode, the charging current information is zero, and the difference between the fifth current detection information and the charging current information is less than or equal to the fourth current threshold and the duration is greater than the sixth time threshold, then the on-board charger short circuit fault data is generated. If the difference between the fifth current detection information and the charging current information is greater than the fourth current threshold and the duration is greater than the seventh time threshold, the on-board charger leakage fault data is generated, and the on-board charger's switching unit is disconnected.

[0055] For example, differential analysis is performed for different operating conditions of electric vehicles: if the electric vehicle is in AC charging mode, the charging current information is zero, and the difference between the fifth current detection information and the charging current information is less than or equal to the fourth current threshold, it indicates that the on-board charger or connecting harness is suspected of having a short circuit fault, and on-board charger short circuit fault data is generated; if, under any operating condition, the difference between the fifth current detection information and the charging current information is greater than the fourth current threshold, it indicates that the on-board charger or connecting harness is suspected of having a leakage fault, and on-board charger leakage fault data is generated, and the on-off unit of the on-board charger needs to be disconnected to avoid circuit burnout.

[0056] In some implementations, the step of generating fault handling strategy data based on current detection information and fault information further includes: Obtain the DC-DC converter current information of the DC-DC converter; If the DC-DC converter current information is zero, and the difference between the sixth current detection information and the DC-DC converter current information is less than or equal to the fifth current threshold and the duration is greater than the eighth time threshold, DC-DC converter short-circuit fault data is generated. If the difference between the sixth current detection information and the DC-DC converter current information is greater than the fifth current threshold and the duration is greater than the ninth time threshold, DC-DC converter leakage fault data is generated, and the DC-DC converter switching unit is disconnected.

[0057] For example, if the DC-DC converter current information is zero and the difference between the sixth current detection information and the DC-DC converter current information is less than or equal to the fifth current threshold, it indicates that the DC-DC converter or connecting harness is suspected of having a short circuit fault, and DC-DC converter short circuit fault data is generated; if, under any operating condition, the difference between the sixth current detection information and the DC-DC converter current information is greater than the fifth current threshold, it indicates that the DC-DC converter or connecting harness is suspected of having a leakage fault, DC-DC converter leakage fault data is generated, and the switching unit of the DC-DC converter needs to be disconnected to avoid circuit burnout.

[0058] In some implementations, the step of generating fault handling strategy data based on current detection information and fault information further includes: Obtain the air conditioning heating current information of the air conditioner heater; If the air conditioning heater of an electric vehicle is turned on, the air conditioning heating current information is zero, the difference between the air conditioning heating current information and the seventh current detection information is less than or equal to the sixth current threshold, and the duration is greater than the tenth time threshold, then air conditioning heater short circuit fault data is generated. If the difference between the air conditioner heating current information and the seventh current detection information is greater than the sixth current threshold and the duration is greater than the eleventh time threshold, then air conditioner heater leakage fault data is generated, and the air conditioner heater on / off unit is disconnected.

[0059] For example, when the air conditioning heater of an electric vehicle is turned on, if the air conditioning heating current information is zero and the difference between the air conditioning heating current information and the seventh current detection information is less than or equal to the sixth current threshold, it indicates that the air conditioning heater or connecting harness is suspected of having a short circuit fault, and air conditioning heater short circuit fault data is generated; if, under any operating condition, the difference between the air conditioning heating current information and the seventh current detection information is greater than the sixth current threshold, it indicates that the air conditioning heater or connecting harness is suspected of having a leakage fault, air conditioning heater leakage fault data is generated, and the on / off unit of the air conditioning heater needs to be disconnected to avoid circuit burnout.

[0060] In some implementations, the step of generating fault handling strategy data based on current detection information and fault information further includes: Obtain the air conditioning compressor's compression current information; If the air conditioning compressor of an electric vehicle is turned on, the air conditioning compressor current information is zero, the difference between the air conditioning compressor current information and the eighth current detection information is less than or equal to the seventh current threshold, and the duration is greater than the twelfth time threshold, then air conditioning compressor short circuit fault data is generated. If the difference between the air conditioner compressor current information and the eighth current detection information is greater than the seventh current threshold and the duration is greater than the thirteenth time threshold, then air conditioner compressor leakage fault data is generated, and the air conditioner compressor on / off unit is disconnected.

[0061] For example, when the air conditioning compressor of an electric vehicle is turned on, if the air conditioning compressor current information is zero and the difference between the air conditioning compressor current information and the eighth current detection information is less than or equal to the seventh current threshold, it indicates that the air conditioning compressor or connecting harness is suspected of having a short circuit fault, and air conditioning compressor short circuit fault data is generated; if, under any operating condition, the difference between the air conditioning compressor current information and the eighth current detection information is greater than the seventh current threshold, it indicates that the air conditioning compressor or connecting harness is suspected of having a leakage fault, air conditioning compressor leakage fault data is generated, and the air conditioning compressor's on / off unit needs to be disconnected to avoid circuit burnout.

[0062] In some implementation scenarios, combined with Figure 1 The high-voltage circuit of the electric vehicle shown, and Figure 2 The specific implementation strategy of the high-voltage fault handling method is shown in the following example: 1. For short circuit faults in the PDU and connecting cables, please refer to [link / reference needed]. Figure 3 , Figure 3 A schematic diagram of the testing process for a high-voltage busbar box provided in an embodiment of this application; S11: The detection logic for the PDU and connecting harness will be triggered in all vehicle operating conditions; S12: Determine whether the condition I5=0, I6=0, I7=0, I8=0 and (fault duration t2>threshold Δt21) is true; S13: Determine whether the condition I2-I5-I6-I7-I8≤thresholdΔI2 and (fault duration t2>thresholdΔt21) is true; S14: Determine whether the conditions I2-I5-I6-I7-I8>ΔI2 and t2>Δt22 are true; S15: Disconnect K1 for vehicle protection; simultaneously disable the vehicle's high-voltage power supply. S161: Hint 1; The instrument panel displays the following message to the user: There is a system malfunction in the vehicle; please contact a 4S dealership for repairs. The diagnostic tool or back-end system will alert the repair personnel: The PDU or connecting harness is suspected of having a short circuit; please check if Fuse 2 is blown. S162: Hint 2; The instrument panel displays the following message to the user: There is a system malfunction in the vehicle; please contact a 4S dealership for repairs. The diagnostic tool or back-end system will alert the maintenance personnel: There is a suspected leakage fault in the PDU or connecting harness; please check the harness and connectors for damage.

[0063] 2. For short circuit faults in the electric drive and connecting wiring harness, please refer to [link / reference]. Figure 4 , Figure 4 A schematic diagram of the detection process for an electric drive provided in an embodiment of this application; S211: Triggered during driving conditions; S212: Triggered in all vehicle operating conditions; S22: Determine whether the condition I(DCU) = 0 and fault duration t(DCU) > threshold Δt31 is met; S23: Determine whether the conditions I3-I(DCU)≤threshold ΔI3 and fault duration t3>threshold Δt31 are met; S24: Determine whether the condition I3-I(DCU)>threshold ΔI3 and t3>threshold Δt32 is met when the fault persists; S25: Disconnect K1 for vehicle protection; simultaneously disable the vehicle's high-voltage power supply. S261: Hint 1; The instrument panel displays the following message to the user: Electric drive malfunction, please contact the 4S store for repair; The diagnostic tool or backend system will alert the repair personnel: There is a suspected short circuit in the electric drive or wiring harness; please check if Fuse 1 is blown. S262: Tip 2; The instrument panel displays the following message to the user: Electric drive malfunction, please contact the 4S store for repair; The diagnostic tool or backend system will alert the maintenance personnel: There may be a leakage fault in the electric drive or wiring harness; please check the wiring harness and connectors for damage; please check the DCU fault codes.

[0064] 3. For short-circuit faults at the DC charging port, please refer to [link / reference needed]. Figure 5 , Figure 5 A schematic diagram of the detection process for a DC charging port provided in an embodiment of this application; S31: Triggered under DC charging conditions; S32: Determine whether the conditions I-pile (current fed back by DC charging pile) -I4>ΔI4 and t4>Δt41 are met; S33: Disconnect K2; Disable DC charging function; S34: Hint 1; The instrument panel displays the following message to the user: DC charging function malfunction, please contact the 4S store for repair; The diagnostic tool or back-end system will alert the repair personnel: There is a suspected leakage fault in the DC charging dock area; please check the wiring harness and connectors for damage.

[0065] 4. For short circuit faults in the OBC and connecting harness, please refer to [link / reference needed]. Figure 6 , Figure 6 A schematic diagram of the detection process for an on-board charger provided in an embodiment of this application; S411: Triggered under AC charging conditions; S412: Triggered under all vehicle operating conditions; S42: Determine whether the condition I(OBC) = 0 and t(OBC) > Δt51 is true; S43: Determine whether the conditions I5-I(OBC)≤ΔI5 and t5>Δt51 are true; S44: Determine whether the condition I5-I(OBC)>ΔI5 and t5>Δt52 is true; S45: Disconnect K3; Disable AC charging function; S461: Hint 1; The instrument panel displays the following message to the user: OBC malfunction, please contact the 4S store for repair; AC charging function is temporarily unavailable. The diagnostic tool or backend system will alert the repair personnel: OBC or connecting harness may have a short circuit; please check if fuse 3 is blown. S462: Hint 2; The instrument panel displays the following message to the user: OBC malfunction, please contact the 4S store for repair; AC charging function is temporarily unavailable. The diagnostic tool or backend system will alert the maintenance personnel: OBC or wiring harness may have a leakage fault; please check the wiring harness and connectors for damage; please check the OBC fault code.

[0066] 5. For short circuit faults in the DC-DC converter and its connecting harness, please refer to [link / reference needed]. Figure 7 , Figure 7This is a schematic diagram of the detection process of a DC-DC converter provided in an embodiment of this application; S51: Triggered under all vehicle operating conditions; S52: Determine whether the condition I(DCDC) = 0 and t(OBC) > Δt61 is true; S53: Determine whether the condition I6-I(DCDC)≤ΔI6 and t6>Δt61 is true; S54: Determine whether the conditions I6-I(DCDC)>ΔI6 and t6>Δt62 are true; S55: Disconnect K4; S561: Hint 1; The instrument panel displays the following message to the user: DCDC malfunction, please contact the 4S store for repair; continued use of the vehicle may result in battery depletion and breakdown. The diagnostic tool or back-end system will alert the repair personnel: There is a suspected short circuit in the DC-DC converter or wiring harness; please check if fuse 4 is blown. S562: Tip 2; The instrument panel displays the following message to the user: DCDC malfunction, please contact the 4S store for repair; continued use of the vehicle may result in battery depletion and breakdown. The diagnostic tool or backend system will alert the repair personnel: There is a suspected leakage fault in the DC-DC converter or wiring harness; please check the wiring harness and connectors for damage; please check the DC-DC fault codes.

[0067] 6. For short circuit faults in the PTC and connecting harness, please refer to [link / reference needed]. Figure 8 , Figure 8 A schematic diagram of the testing process for an air conditioner heater provided in an embodiment of this application; S611: Triggered when PTC is enabled; S612: Triggered under all vehicle operating conditions; S62: Determine whether the condition I(PTC) = 0 and t(PTC) > Δt71 is true; S63: Determine whether the condition I7-I(PTC)≤ΔI7 and t7>Δt71 is true; S64: Determine whether the conditions I7-I(PTC)>ΔI7 and t7>Δt72 are true; S65: Disconnect K5; disable air conditioning heating function; disable vehicle preheating function; disable power battery heating function; S661: Hint 1; The instrument panel displays the following message to the user: PTC malfunction, please contact the 4S store for repair; Air conditioning heating function is temporarily unavailable. The diagnostic tool or backend system will alert the repair personnel: There is a suspected short circuit in the PTC or wiring harness; please check if the fuse 5 is blown. S662: Hint 2; The instrument panel displays the following message to the user: PTC malfunction, please contact the 4S store for repair; Air conditioning heating function is temporarily unavailable. The diagnostic tool or backend system will alert the maintenance personnel: There is a suspected leakage fault in the PTC or wiring harness; please check the wiring harness and connectors for damage; please check the PTC fault codes.

[0068] 7. For short circuit faults in the ECP and connecting harness, please refer to [link / reference needed]. Figure 9 , Figure 9 A schematic diagram of the testing process for an air conditioner compressor provided in an embodiment of this application; S711: Triggered when ECP is enabled; S712: Triggered under all vehicle operating conditions; S72: Determine whether the condition I(ECP) = 0 and t(ECP) > Δt81 is true; S73: Determine whether the condition I8-I(ECP)≤ΔI8 and t8>Δt81 holds true; S74: Determine whether the conditions I8-I(ECP)>ΔI8 and t8>Δt82 are true; S75: Disconnect K6; disable air conditioning cooling function; disable vehicle pre-cooling function; disable power battery cooling function; S761: Hint 1; The instrument panel displays the following warnings to the user: ECP malfunction, please contact the 4S store for repair; air conditioning cooling function is temporarily unavailable; continued use of the vehicle may result in overheating of components. The diagnostic tool or backend system will alert the repair personnel: There is a suspected short circuit in the ECP or connecting harness; please check if Fuse 6 is blown. S762: Tip 2; The instrument panel displays the following warnings to the user: ECP malfunction, please contact the 4S store for repair; air conditioning cooling function is temporarily unavailable; continued use of the vehicle may result in overheating of components. The diagnostic tool or backend system will alert the maintenance personnel: There is a suspected leakage fault in the ECP or connecting harness; please check the harness and connectors for damage; please check the PTC fault codes.

[0069] Please see Figure 10 , Figure 10 This application provides a structural block diagram of a high-voltage fault handling system, which includes: The acquisition module 100 is used to acquire the current detection information of the electric vehicle. Each component of the electric vehicle is equipped with a current detector and a switching unit. The current of each component of the electric vehicle is detected by the current detector. The fault module 200 is used to obtain fault information of the electric vehicle based on the current detection information. The strategy module 300 is used to generate fault handling strategy data based on current detection information and fault information, and to control the on / off state of the switching unit according to the fault handling strategy data.

[0070] In some embodiments, the electric vehicle includes a power battery, a high-voltage junction box connected to the power battery, and an on-board charger, a DC-DC converter, an air conditioning heater, and an air conditioning compressor respectively connected to the high-voltage junction box. The strategy module 300 is also used for: Acquire the second current detection information of the high-voltage junction box, the fifth current detection information of the on-board charger, the sixth current detection information of the DC converter, the seventh current detection information of the air conditioner heater, and the eighth current detection information of the air conditioner compressor; The total current value is generated based on the fifth, sixth, seventh, and eighth current detection information. If the fifth, sixth, seventh, and eighth current detection information are all zero, the difference between the second current detection information and the total current value is less than or equal to the first current threshold, and the duration is greater than the first time threshold, then bus box short circuit fault data is generated. If the difference between the second current detection information and the total current value is greater than the first current threshold and the duration is greater than the second time threshold, bus box leakage fault data is generated, and the power battery switching unit is disconnected.

[0071] In some implementations, the electric vehicle also includes an electric drive connected to the power battery, and the strategy module 300 is further used for: Acquire operating condition information of electric vehicles, as well as electric drive current information and third current detection information; If the electric vehicle is in driving condition, the electric drive current information is zero, the difference between the electric drive current information and the third current detection information is less than or equal to the second current threshold, and the duration is greater than the third time threshold, then electric drive short circuit fault data is generated. If the difference between the electric drive current information and the third current detection information is greater than the second current threshold and the duration is greater than the fourth time threshold, then electric drive leakage fault data is generated, and the power battery switching unit is disconnected.

[0072] In some implementations, the electric vehicle also includes a DC charging port connected to the power battery, and the strategy module 300 is further used for: Obtain the fourth detection current information of the DC charging port; If the electric vehicle is in DC charging mode, and the difference between the output current of the charging pile and the fourth detection current information is greater than the third current threshold and the duration is greater than the fifth time threshold, DC charging port leakage fault data is generated, and the DC charging port switching unit is disconnected.

[0073] In some implementations, the strategy module 300 is also used for: Obtain the charging current information of the on-board charger; If the electric vehicle is in AC charging mode, the charging current information is zero, and the difference between the fifth current detection information and the charging current information is less than or equal to the fourth current threshold and the duration is greater than the sixth time threshold, then the on-board charger short circuit fault data is generated. If the difference between the fifth current detection information and the charging current information is greater than the fourth current threshold and the duration is greater than the seventh time threshold, the on-board charger leakage fault data is generated, and the on-board charger's switching unit is disconnected.

[0074] In some implementations, the strategy module 300 is also used for: Obtain the DC-DC converter current information of the DC-DC converter; If the DC-DC converter current information is zero, and the difference between the sixth current detection information and the DC-DC converter current information is less than or equal to the fifth current threshold and the duration is greater than the eighth time threshold, DC-DC converter short-circuit fault data is generated. If the difference between the sixth current detection information and the DC-DC converter current information is greater than the fifth current threshold and the duration is greater than the ninth time threshold, DC-DC converter leakage fault data is generated, and the DC-DC converter switching unit is disconnected.

[0075] In some implementations, the strategy module 300 is also used for: Obtain the air conditioning heating current information of the air conditioner heater; If the air conditioning heater of an electric vehicle is turned on, the air conditioning heating current information is zero, the difference between the air conditioning heating current information and the seventh current detection information is less than or equal to the sixth current threshold, and the duration is greater than the tenth time threshold, then air conditioning heater short circuit fault data is generated. If the difference between the air conditioner heating current information and the seventh current detection information is greater than the sixth current threshold and the duration is greater than the eleventh time threshold, then air conditioner heater leakage fault data is generated, and the air conditioner heater on / off unit is disconnected.

[0076] In some implementations, the strategy module 300 is also used for: Obtain the air conditioning compressor's compression current information; If the air conditioning compressor of an electric vehicle is turned on, the air conditioning compressor current information is zero, the difference between the air conditioning compressor current information and the eighth current detection information is less than or equal to the seventh current threshold, and the duration is greater than the twelfth time threshold, then air conditioning compressor short circuit fault data is generated. If the difference between the air conditioner compressor current information and the eighth current detection information is greater than the seventh current threshold and the duration is greater than the thirteenth time threshold, then air conditioner compressor leakage fault data is generated, and the air conditioner compressor on / off unit is disconnected.

[0077] It should be noted that the high-voltage fault handling system provided in this application is similar to... Figures 1 to 9 The method embodiments shown correspond to each other, and will not be described again here to avoid repetition.

[0078] This application also provides an electronic device, please refer to [link to application]. Figure 11 , Figure 11 This is a structural block diagram of an electronic device provided in an embodiment of this application. The electronic device may include a processor 510, a communication interface 520, a memory 530, and at least one communication bus 540. The communication bus 540 is used to enable direct communication between these components. In this embodiment, the communication interface 520 of the electronic device is used for signaling or data communication with other node devices. The processor 510 may be an integrated circuit chip with signal processing capabilities.

[0079] The processor 510 described above can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor, or the processor 510 can be any conventional processor.

[0080] The memory 530 may be, but is not limited to, random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), etc. The memory 530 stores computer-readable instructions. When these computer-readable instructions are executed by the processor 510, the electronic device can perform the aforementioned operations. Figures 1 to 9 The various steps involved in the method implementation examples.

[0081] Alternatively, the electronic device may also include a storage controller and an input / output unit.

[0082] The memory 530, storage controller, processor 510, peripheral interface, and input / output unit are electrically connected directly or indirectly to achieve data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses 540. The processor 510 is used to execute executable modules stored in the memory 530, such as software function modules or computer programs included in electronic devices.

[0083] The input / output unit is used to provide users with the ability to create tasks and to set optional start periods or preset execution times for those tasks, thereby enabling user-server interaction. The input / output unit may be, but is not limited to, a mouse and keyboard.

[0084] Understandable. Figure 11 The structure shown is for illustrative purposes only; the electronic device may also include components that are more advanced than those shown. Figure 11 The more or fewer components shown, or having the same Figure 11 The different configurations shown. Figure 11 The components shown can be implemented using hardware, software, or a combination thereof.

[0085] This application also provides a storage medium storing instructions. When the instructions are run on a computer, the computer program is executed by a processor to implement the method described in the method embodiment. To avoid repetition, the method will not be described again here.

[0086] This application also provides a computer program product that, when run on a computer, causes the computer to perform the method described in the method embodiment.

[0087] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0088] In addition, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0089] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0090] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0091] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

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

Claims

1. A method for handling high-voltage faults, characterized in that, include: Acquire current detection information of electric vehicle, wherein each component of electric vehicle is equipped with a current detector and a switching unit, and the current of each component of electric vehicle is detected by the current detector; The fault information of the electric vehicle is obtained based on the current detection information; Based on the current detection information and the fault information, fault handling strategy data is generated, and the on / off state of the switching unit is controlled according to the fault handling strategy data; The electric vehicle includes a power battery, a high-voltage junction box connected to the power battery, and an on-board charger, a DC-DC converter, an air conditioning heater, and an air conditioning compressor respectively connected to the high-voltage junction box. The step of generating fault handling strategy data based on the current detection information and the fault information includes: Acquire the second current detection information of the high-voltage junction box, the fifth current detection information of the on-board charger, the sixth current detection information of the DC converter, the seventh current detection information of the air conditioner heater, and the eighth current detection information of the air conditioner compressor; The total current value is generated based on the fifth, sixth, seventh, and eighth current detection information. If the fifth, sixth, seventh, and eighth current detection information are all zero, and the difference between the second current detection information and the total current value is less than or equal to the first current threshold and the duration is greater than the first time threshold, then bus box short circuit fault data is generated. If the difference between the second current detection information and the total current value is greater than the first current threshold and the duration is greater than the second time threshold, bus box leakage fault data is generated, and the power battery switching unit is disconnected.

2. The method for handling high-voltage faults according to claim 1, characterized in that, The electric vehicle also includes an electric drive connected to the power battery. The step of generating fault handling strategy data based on the current detection information and the fault information further includes: Obtain the operating condition information of the electric vehicle, as well as the electric drive current information and the third current detection information of the electric drive. If the electric vehicle is in driving condition, the electric drive current information is zero, the difference between the electric drive current information and the third current detection information is less than or equal to the second current threshold and the duration is greater than the third time threshold, then electric drive short circuit fault data is generated. If the difference between the electric drive current information and the third current detection information is greater than the second current threshold and the duration is greater than the fourth time threshold, then electric drive leakage fault data is generated, and the power battery switching unit is disconnected.

3. The method for handling high-voltage faults according to claim 2, characterized in that, The electric vehicle also includes a DC charging port connected to the power battery. The step of generating fault handling strategy data based on the current detection information and the fault information further includes: Obtain the fourth current detection information of the DC charging port; If the electric vehicle is in DC charging mode and the difference between the output current of the charging pile and the fourth current detection information is greater than the third current threshold and the duration is greater than the fifth time threshold, DC charging port leakage fault data is generated, and the DC charging port switching unit is disconnected.

4. The method for handling high-voltage faults according to claim 2, characterized in that, The step of generating fault handling strategy data based on the current detection information and the fault information further includes: Obtain the charging current information of the on-board charger; If the electric vehicle is in AC charging mode, the charging current information is zero and the difference between the fifth current detection information and the charging current information is less than or equal to the fourth current threshold and the duration is greater than the sixth time threshold, then the on-board charger short circuit fault data is generated. If the difference between the fifth current detection information and the charging current information is greater than the fourth current threshold and the duration is greater than the seventh time threshold, leakage fault data of the on-board charger is generated, and the on-off unit of the on-board charger is disconnected.

5. The method for handling high-voltage faults according to claim 1, characterized in that, The step of generating fault handling strategy data based on the current detection information and the fault information further includes: Obtain the DC-DC converter current information of the DC-DC converter; If the DC-DC converter current information is zero and the difference between the sixth current detection information and the DC-DC converter current information is less than or equal to the fifth current threshold and the duration is greater than the eighth time threshold, DC-DC converter short-circuit fault data is generated. If the difference between the sixth current detection information and the DC-DC converter current information is greater than the fifth current threshold and the duration is greater than the ninth time threshold, DC-DC converter leakage fault data is generated, and the DC-DC converter switching unit is disconnected.

6. The method for handling high-voltage faults according to claim 1, characterized in that, The step of generating fault handling strategy data based on the current detection information and the fault information further includes: Obtain the air conditioning heating current information of the air conditioning heater; If the electric vehicle turns on the air conditioning heater, the air conditioning heating current information is zero, the difference between the air conditioning heating current information and the seventh current detection information is less than or equal to the sixth current threshold and the duration is greater than the tenth time threshold, then air conditioning heater short circuit fault data is generated. If the difference between the air conditioner heating current information and the seventh current detection information is greater than the sixth current threshold and the duration is greater than the eleventh time threshold, then air conditioner heater leakage fault data is generated, and the air conditioner heater on / off unit is disconnected.

7. A high-voltage fault handling system, characterized in that, include: An acquisition module is used to acquire current detection information of an electric vehicle. Each component of the electric vehicle is equipped with a current detector and a switching unit, and the current of each component of the electric vehicle is detected by the current detector. The fault module is used to obtain fault information of the electric vehicle based on the current detection information. The strategy module is used to generate fault handling strategy data based on the current detection information and the fault information, and to control the on / off state of the switching unit based on the fault handling strategy data. The electric vehicle includes a power battery, a high-voltage junction box connected to the power battery, and an on-board charger, a DC-DC converter, an air conditioning heater, and an air conditioning compressor respectively connected to the high-voltage junction box. The step of generating fault handling strategy data based on the current detection information and the fault information includes: Acquire the second current detection information of the high-voltage junction box, the fifth current detection information of the on-board charger, the sixth current detection information of the DC converter, the seventh current detection information of the air conditioner heater, and the eighth current detection information of the air conditioner compressor; The total current value is generated based on the fifth, sixth, seventh, and eighth current detection information. If the fifth, sixth, seventh, and eighth current detection information are all zero, and the difference between the second current detection information and the total current value is less than or equal to the first current threshold and the duration is greater than the first time threshold, then bus box short circuit fault data is generated. If the difference between the second current detection information and the total current value is greater than the first current threshold and the duration is greater than the second time threshold, bus box leakage fault data is generated, and the power battery switching unit is disconnected.

8. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of the high-voltage fault handling method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when executed on a computer, cause the computer to perform the high-voltage fault handling method as described in any one of claims 1 to 6.

Images