Vehicle and method, device, storage medium and system for detecting location of insulation fault

Abstract

The application discloses a vehicle and an insulation fault position detection method, device, storage medium and system thereof, wherein the vehicle comprises a battery pack end, a whole vehicle end, a fast charging end, a main relay pair arranged between the battery pack end and the whole vehicle end, a fast charging relay pair arranged between the whole vehicle end and the fast charging end, and the battery pack end comprises an insulation detection loop, the method comprises the following steps: after determining that the vehicle has an insulation fault, controlling the main relay pair and the fast charging relay pair to be disconnected, and judging whether the battery pack end is the insulation fault position according to the insulation resistance value of the battery pack end; if the insulation resistance value of the battery pack end is greater than a preset insulation threshold value, controlling the main relay pair to be closed, and judging whether the whole vehicle end is the insulation fault position according to the insulation resistance value of the whole vehicle end; and if the insulation resistance value of the whole vehicle end is greater than the preset insulation threshold value, determining that the fast charging end is the insulation fault position. Therefore, the insulation fault position of the vehicle can be accurately identified, so that the fault checking range is reduced, and the checking efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle fault detection technology, and in particular to a method for detecting the location of insulation faults in a vehicle, a computer-readable storage medium, a power management system, and a device for detecting the location of insulation faults in a vehicle. Background Technology

[0002] As the DC bus circuit structure of vehicles (e.g., the bus circuit at the battery pack end, the bus circuit at the vehicle end, and the bus circuit at the fast charging end during vehicle fast charging) becomes increasingly complex, it is often necessary to quickly identify the location of the insulation fault when an insulation fault occurs in the vehicle, thereby ensuring the safety of the entire vehicle.

[0003] However, the insulation fault detection technology of related technologies can usually only detect the insulation condition of all circuits connected to the DC bus circuit of the whole vehicle, but cannot accurately identify the location of insulation faults, which brings great difficulty to fault diagnosis. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this invention is to provide a method for detecting the location of insulation faults in vehicles, which can accurately identify the location of insulation faults, thereby narrowing the scope of fault investigation and improving investigation efficiency.

[0005] A second objective of this invention is to provide a computer-readable storage medium.

[0006] The third objective of this invention is to provide a power management system.

[0007] The fourth objective of this invention is to provide a device for detecting the location of insulation faults in a vehicle.

[0008] The fifth objective of this invention is to provide a vehicle.

[0009] To achieve the above objectives, a first aspect of the present invention provides a method for detecting the location of an insulation fault in a vehicle. The vehicle includes a battery pack end, a vehicle end, a fast charging end, a pair of main relays disposed between the battery pack end and the vehicle end, and a pair of fast charging relays disposed between the vehicle end and the fast charging end. The battery pack end includes an insulation detection circuit. The method includes: after determining that an insulation fault has occurred in the vehicle, controlling the main relay pair and the fast charging relay pair to disconnect, and obtaining the insulation resistance value of the battery pack end through the insulation detection circuit, so as to determine whether the battery pack end has an insulation fault based on the insulation resistance value of the battery pack end. Location; if the insulation resistance value at the battery pack end is less than a preset insulation threshold, then the battery pack end is determined to be the insulation fault location; if the insulation resistance value at the battery pack end is greater than the preset insulation threshold, then the main relay is controlled to close, and the insulation resistance value at the vehicle end is obtained through the insulation detection circuit, so as to determine whether the vehicle end is an insulation fault location based on the insulation resistance value at the vehicle end; if the insulation resistance value at the vehicle end is less than the preset insulation threshold, then the vehicle end is determined to be the insulation fault location; if the insulation resistance value at the vehicle end is greater than the preset insulation threshold, then the fast charging end is determined to be the insulation fault location.

[0010] According to the vehicle insulation fault location detection method of the present invention, after determining that an insulation fault has occurred in the vehicle, the main relay pair and the fast charging relay pair are controlled to disconnect, and the insulation resistance value of the battery pack end is obtained through the insulation detection circuit. Based on the insulation resistance value of the battery pack end, it is determined whether the battery panel end is an insulation fault location. Specifically, if the insulation resistance value of the battery pack end is less than a preset insulation threshold, the battery pack end is determined to be an insulation fault location; if the insulation resistance value of the battery pack end is greater than the preset insulation threshold, the main relay pair is controlled to close, and the insulation resistance value of the entire vehicle end is obtained through the insulation detection circuit. Based on the insulation resistance value of the entire vehicle end, it is determined whether the entire vehicle end is an insulation fault location. Specifically, if the insulation resistance value of the entire vehicle end is less than the preset insulation threshold, the entire vehicle end is determined to be an insulation fault location; if the insulation resistance value of the entire vehicle end is greater than the preset insulation threshold, the fast charging end is determined to be an insulation fault location. This accurately identifies the vehicle insulation fault location, thereby narrowing the fault investigation scope and improving investigation efficiency.

[0011] In addition, the vehicle insulation fault location detection method according to the above embodiments of the present invention may also have the following additional technical features:

[0012] According to one embodiment of the present invention, the battery pack terminal further includes a positive electrode insulation resistance and a negative electrode insulation resistance. The insulation resistance value of the battery pack terminal includes a positive electrode insulation resistance value and a negative electrode insulation resistance value. Obtaining the insulation resistance value of the battery pack terminal through the insulation detection circuit includes: obtaining the positive electrode insulation resistance value of the battery through the insulation detection circuit and the positive electrode insulation resistance, and obtaining the negative electrode insulation resistance value of the battery through the insulation detection circuit and the negative electrode insulation resistance.

[0013] According to one embodiment of the present invention, determining whether the battery pack terminal is an insulation fault location based on the insulation resistance value of the battery pack terminal includes: determining whether the insulation resistance value of the positive electrode of the battery is less than the preset insulation threshold, or whether the insulation resistance value of the negative electrode of the battery is less than the preset insulation threshold; if the insulation resistance value of the positive electrode of the battery is less than the preset insulation threshold, or the insulation resistance value of the negative electrode of the battery is less than the preset insulation threshold, then the battery pack terminal is determined as the insulation fault location.

[0014] According to one embodiment of the present invention, the vehicle terminal further includes a vehicle positive insulation resistance and a vehicle negative insulation resistance. The insulation resistance value of the vehicle terminal includes a vehicle positive insulation resistance value and a vehicle negative insulation resistance value. Obtaining the insulation resistance value of the vehicle terminal through the insulation detection circuit includes: obtaining the vehicle positive insulation resistance value through the insulation detection circuit and the vehicle positive insulation resistance, and obtaining the vehicle negative insulation resistance value through the insulation detection circuit and the vehicle negative insulation resistance.

[0015] According to one embodiment of the present invention, determining whether the vehicle terminal is an insulation fault location based on the insulation resistance value of the vehicle terminal includes: determining whether the insulation resistance value of the positive terminal of the vehicle is less than the preset insulation threshold, or whether the insulation resistance value of the negative terminal of the vehicle is less than the preset insulation threshold; if the insulation resistance value of the positive terminal of the vehicle is less than the preset insulation threshold, or the insulation resistance value of the negative terminal of the vehicle is less than the preset insulation threshold, then the vehicle terminal is determined as the insulation fault location.

[0016] According to one embodiment of the present invention, the method for detecting the location of an insulation fault in a vehicle further includes: performing insulation failure processing on the location of the insulation fault.

[0017] To achieve the above objectives, a computer-readable storage medium is provided in a second aspect embodiment of the present invention, on which an insulation fault location detection program for a vehicle is stored. When the insulation fault location detection program for a vehicle is executed by a processor, the insulation fault location detection method for a vehicle as described in the first aspect embodiment is implemented.

[0018] According to embodiments of the present invention, a computer-readable storage medium, by executing a vehicle insulation fault location detection program stored thereon via a processor, can accurately identify the location of vehicle insulation faults, thereby narrowing the scope of fault investigation and improving investigation efficiency.

[0019] To achieve the above objectives, a power management system according to a third aspect embodiment of the present invention includes a memory and a processor. The memory stores a vehicle insulation fault location detection program, and the processor executes the vehicle insulation fault location detection program to implement the vehicle insulation fault location detection method as described in the first aspect embodiment.

[0020] According to the power management system of the present invention, by executing the vehicle insulation fault location detection program stored in the memory by the processor, the location of vehicle insulation faults can be accurately identified, thereby narrowing the scope of fault investigation and improving the investigation efficiency.

[0021] To achieve the above objectives, a fourth aspect of the present invention provides a vehicle insulation fault location detection device, wherein the vehicle includes a battery pack end, a vehicle end, a fast charging end, a main relay pair disposed between the battery pack end and the vehicle end, and a fast charging relay pair disposed between the vehicle end and the fast charging end. The battery pack end includes an insulation detection circuit. The device includes: a control module, used to control the main relay pair and the fast charging relay pair to disconnect after determining that an insulation fault has occurred in the vehicle; an acquisition module, used to acquire the insulation resistance value of the battery pack end through the insulation detection circuit; and a judgment module, used to determine whether the battery pack end is an insulation fault location based on the insulation resistance value of the battery pack end. If the insulation resistance value at the battery pack end is less than a preset insulation threshold, then the battery pack end is determined to be the insulation fault location. If the insulation resistance value at the battery pack end is greater than the preset insulation threshold, then the control module is further configured to control the main relay to close. The acquisition module is further configured to acquire the insulation resistance value at the vehicle end through the insulation detection circuit. The judgment module is further configured to determine whether the vehicle end is an insulation fault location based on the insulation resistance value at the vehicle end. If the insulation resistance value at the vehicle end is less than the preset insulation threshold, then the vehicle end is determined to be the insulation fault location. If the insulation resistance value at the vehicle end is greater than the preset insulation threshold, then the fast charging end is determined to be the insulation fault location.

[0022] According to an embodiment of the present invention, a vehicle insulation fault location detection device, after determining that an insulation fault has occurred in the vehicle, controls the main relay pair and the fast charging relay pair to disconnect via a control module, and acquires the insulation resistance value of the battery pack end via an insulation detection circuit via an acquisition module. A judgment module then determines whether the battery pack end is an insulation fault location based on the insulation resistance value of the battery pack end. Specifically, if the insulation resistance value of the battery pack end is less than a preset insulation threshold, the battery pack end is determined to be an insulation fault location; if the insulation resistance value of the battery pack end is greater than the preset insulation threshold, the control module controls the main relay pair to close, and the acquisition module acquires the insulation resistance value of the entire vehicle end via an insulation detection circuit. The judgment module then determines whether the battery pack end is an insulation fault location based on the insulation resistance value of the battery pack end.

[0023] Based on the insulation resistance value at the vehicle end, determine whether the vehicle end is an insulation fault location. Specifically, if the insulation resistance value at the vehicle end is less than a preset insulation threshold, the vehicle end is determined to be an insulation fault location; if the insulation resistance value at the vehicle end is greater than a preset insulation threshold, the vehicle end is determined to be an insulation fault location.

[0024] If the insulation threshold is reached, the fast charging terminal is identified as the location of the insulation fault. This allows for accurate identification of the vehicle's insulation fault location, narrowing down the troubleshooting scope and improving efficiency.

[0025] To achieve the above objectives, the fifth aspect of the present invention provides a vehicle including an insulation fault location detection device for a vehicle as described in the fourth aspect.

[0026] 0. According to an embodiment of the present invention, a vehicle employing the aforementioned insulation fault location detection device of the vehicle according to an embodiment of the present invention...

[0027] This device can accurately identify the location of insulation faults in vehicles, thereby narrowing down the scope of fault investigation and improving investigation efficiency.

[0028] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. 5. Attached Figure Descriptions

[0029] Figure 1 This is a schematic diagram of the structure of a vehicle according to an embodiment of the present invention;

[0030] Figure 2 This is a schematic flowchart of a vehicle insulation fault location detection method according to an embodiment of the present invention;

[0031] Figure 3 This is a block diagram of a vehicle insulation fault location detection device according to an embodiment of the present invention;

[0032] Figure 4 This is a block diagram of a vehicle insulation fault location detection device according to another embodiment of the present invention; 0 Figure 5This is a block diagram of a vehicle insulation fault location detection device according to an embodiment of the present invention;

[0033] Figure 6 This is a block diagram of a vehicle according to an embodiment of the present invention. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The following description, with reference to the accompanying drawings, illustrates...

[0035] The embodiments described are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] The following description, with reference to the accompanying drawings, describes a vehicle insulation fault location detection method, a computer-readable storage medium, a power management system, a vehicle insulation fault location detection device, and a vehicle according to embodiments of the present invention.

[0037] Before introducing the vehicle insulation fault location detection method, computer-readable storage medium, power management system, vehicle insulation fault location detection device, and vehicle according to embodiments of the present invention, the specific structure of the vehicle according to embodiments of the present invention will be described first.

[0038] Provide the corresponding explanation.

[0039] like Figure 1 As shown, in some embodiments of the present invention, the vehicle includes a battery pack end A, a vehicle end B, a fast charging end C, a pair of main relays (main positive relay Zz and main negative relay Zf) disposed between the battery pack end A and the vehicle end B, and a pair of fast charging relays (fast charging positive relay Kz and fast charging negative relay Kf) disposed between the vehicle end B and the fast charging end C. The battery pack end A includes an insulation detection circuit Ac.

[0040] Figure 2 This is a schematic flowchart of a vehicle insulation fault location detection method according to an embodiment of the present invention.

[0041] like Figure 2 As shown, the method for detecting the location of insulation faults in a vehicle includes:

[0042] S101, after determining that an insulation fault has occurred in the vehicle, controls the main relay pair and the fast charging relay pair to disconnect, and obtains the insulation resistance value of the battery pack end through the insulation detection circuit, so as to determine whether the battery pack end is the location of the insulation fault based on the insulation resistance value of the battery pack end.

[0043] Specifically, in some embodiments of the present invention, after determining that an insulation fault has occurred in the vehicle, the main relay pair and the fast charging relay pair can be disconnected to separate the bus circuit at the vehicle end and the bus circuit at the fast charging end from the bus circuit at the battery pack end. Then, the insulation resistance value at the battery pack end can be obtained through the insulation detection circuit, so as to determine whether the battery pack end is an insulation fault location based on the insulation resistance value at the battery pack end.

[0044] Optionally, in some embodiments of the present invention, the insulation fault of the vehicle may include insulation faults in the overall vehicle state and insulation faults during fast charging.

[0045] S102, if the insulation resistance value at the battery pack end is less than the preset insulation threshold, the battery pack end is determined to be an insulation fault location. If the insulation resistance value at the battery pack end is greater than the preset insulation threshold, the main relay is controlled to close, and the insulation resistance value at the vehicle end is obtained through the insulation detection circuit, so as to determine whether the vehicle end is an insulation fault location based on the insulation resistance value at the vehicle end.

[0046] Specifically, in some embodiments of the present invention, when the insulation resistance value at the battery pack end is less than a preset insulation threshold, the battery pack end can be determined to be an insulation fault location. When the insulation resistance value at the battery pack end is greater than the preset insulation threshold, the main relay can be controlled to close, so that the bus circuit at the vehicle end is connected to the insulation detection circuit at the battery pack end. Then, the insulation resistance value at the vehicle end can be obtained through the insulation detection circuit, so as to determine whether the vehicle end is an insulation fault location based on the insulation resistance value at the vehicle end.

[0047] S103, if the insulation resistance value at the vehicle end is less than the preset insulation threshold, the vehicle end is determined to be the location of the insulation fault; if the insulation resistance value at the vehicle end is greater than the preset insulation threshold, the fast charging end is determined to be the location of the insulation fault.

[0048] It should be understood that, in the above embodiments of the present invention, after determining that an insulation fault has occurred in the vehicle, the main relay pair and the fast charging relay pair can be controlled to disconnect, and the insulation resistance value of the battery pack end can be obtained through the insulation detection circuit. Based on the insulation resistance value of the battery pack end, it can be determined whether the battery pack end is an insulation fault location. If the insulation resistance value of the battery pack end is less than a preset insulation threshold, the battery pack end can be determined to be an insulation fault location. In addition, if the insulation resistance value of the battery pack end is greater than the preset insulation threshold, the main relay pair can be controlled to close, and the insulation resistance value of the whole vehicle end can be obtained through the insulation detection circuit. Based on the insulation resistance value of the whole vehicle end, it can be determined whether the whole vehicle end is an insulation fault location. If the insulation resistance value of the whole vehicle end is less than the preset insulation threshold, the whole vehicle end is determined to be an insulation fault location. And if the insulation resistance value of the whole vehicle end is greater than the preset insulation threshold, the fast charging end is determined to be an insulation fault location. Therefore, after determining that an insulation fault has occurred in a vehicle, it is possible to quickly determine whether the insulation fault is located at the battery pack end, the vehicle end, or the fast charging end, thereby accurately identifying the location of the vehicle insulation fault, narrowing the scope of fault investigation, and improving troubleshooting efficiency.

[0049] Furthermore, such as Figure 1 As shown, battery pack terminal A also includes battery positive electrode insulation resistance Raz and battery negative electrode insulation resistance Raf. The insulation resistance value of the battery pack terminal includes the battery positive electrode insulation resistance value and the battery negative electrode insulation resistance value. The insulation resistance value of the battery pack terminal is obtained through the insulation detection circuit, which includes: obtaining the battery positive electrode insulation resistance value through the insulation detection circuit and the battery positive electrode insulation resistance, and obtaining the battery negative electrode insulation resistance value through the insulation detection circuit and the battery negative electrode insulation resistance.

[0050] It should be understood that, in the above embodiments of the present invention, the insulation detection circuit can be connected to the insulation resistance of the positive electrode of the battery to obtain the insulation resistance value of the positive electrode of the battery through the insulation detection circuit, and the insulation detection circuit can be connected to the insulation resistance of the negative electrode of the battery to obtain the insulation resistance value of the negative electrode of the battery through the insulation detection circuit, thereby determining whether the battery pack end is an insulation fault location based on the insulation resistance value of the positive electrode of the battery and the insulation resistance value of the negative electrode of the battery.

[0051] Furthermore, such as Figure 3 As shown, determining whether an insulation fault occurs at a battery pack terminal based on the insulation resistance value includes:

[0052] S201, determine whether the insulation resistance value of the positive electrode of the battery is less than the preset insulation threshold, or whether the insulation resistance value of the negative electrode of the battery is less than the preset insulation threshold.

[0053] Specifically, in some embodiments of the present invention, the battery pack end can be determined to meet the insulation detection strategy based on the comparison result of the insulation resistance value of the positive electrode of the battery and the preset insulation threshold, or the comparison result of the insulation resistance value of the negative electrode of the battery and the preset insulation threshold, thereby determining whether the battery pack end is an insulation fault location.

[0054] S202, if the insulation resistance value of the positive terminal of the battery is less than the preset insulation threshold, or if the insulation resistance value of the negative terminal of the battery is less than the preset insulation threshold, then the battery pack terminal is determined as the location of the insulation fault.

[0055] It should be understood that in the above embodiments of the present invention, when the insulation resistance value of the positive electrode of the battery is less than the preset insulation threshold, or when the insulation resistance value of the negative electrode of the battery is less than the preset insulation threshold, it is determined that the insulation detection strategy is not met at the battery pack end. At this time, the battery pack end can be identified as the insulation fault location. Conversely, when the insulation resistance value of the positive electrode of the battery is greater than the preset insulation threshold and the insulation resistance value of the negative electrode of the battery is greater than the preset insulation threshold, it is determined that the insulation detection strategy is met at the battery pack end. At this time, it is necessary to further determine whether the insulation fault location is at the vehicle end or the fast charging end, so as to accurately identify the vehicle insulation fault location, thereby narrowing the fault investigation scope and improving the investigation efficiency.

[0056] Furthermore, such as Figure 1 As shown, the vehicle terminal B also includes the vehicle positive insulation resistance Rbz and the vehicle negative insulation resistance Rbf. The insulation resistance value of the vehicle terminal includes the vehicle positive insulation resistance value and the vehicle negative insulation resistance value. The insulation resistance value of the vehicle terminal is obtained through the insulation detection circuit, which includes: obtaining the vehicle positive insulation resistance value through the insulation detection circuit and the vehicle positive insulation resistance, and obtaining the vehicle negative insulation resistance value through the insulation detection circuit and the vehicle negative insulation resistance.

[0057] It should be understood that, in the above embodiments of the present invention, the insulation detection circuit can be connected to the positive insulation resistance of the vehicle to obtain the positive insulation resistance value of the vehicle, and the insulation detection circuit can be connected to the negative insulation resistance of the vehicle to obtain the negative insulation resistance value of the vehicle. Based on the positive and negative insulation resistance values ​​of the vehicle, it can be determined whether the vehicle end is an insulation fault location.

[0058] Furthermore, such as Figure 4 As shown, based on the insulation resistance value at the vehicle end, it is determined whether the vehicle end is an insulation fault location, including:

[0059] S301, determine whether the insulation resistance value of the positive terminal of the vehicle is less than the preset insulation threshold, or whether the insulation resistance value of the negative terminal of the vehicle is less than the preset insulation threshold.

[0060] Specifically, in some embodiments of the present invention, the vehicle end can be judged to meet the insulation detection strategy based on the comparison result of the positive insulation resistance value of the whole vehicle and the preset insulation threshold, or the comparison result of the negative insulation resistance value of the whole vehicle and the preset insulation threshold, thereby determining whether the vehicle end is an insulation fault location.

[0061] S302, if the insulation resistance value of the positive terminal of the vehicle is less than the preset insulation threshold, or if the insulation resistance value of the negative terminal of the vehicle is less than the preset insulation threshold, then the vehicle terminal is determined to be the location of the insulation fault.

[0062] It should be understood that in the above embodiments of the present invention, when the insulation resistance value of the positive electrode of the vehicle is less than the preset insulation threshold, or when the insulation resistance value of the negative electrode of the vehicle is less than the preset insulation threshold, it is determined that the insulation detection strategy is not met at the vehicle end. At this time, the vehicle end can be identified as the insulation fault location. Conversely, when the insulation resistance value of the positive electrode of the vehicle is greater than the preset insulation threshold and the insulation resistance value of the negative electrode of the vehicle is greater than the preset insulation threshold, it is determined that the insulation detection strategy is met at the vehicle end. At this time, the fast charging end can be identified as the insulation fault location, thereby accurately identifying the vehicle insulation fault location, thereby narrowing the fault investigation scope and improving investigation efficiency.

[0063] Furthermore, the method for detecting the location of insulation faults in vehicles also includes: performing insulation failure treatment on the location of the insulation fault.

[0064] It should be understood that, in the above embodiments of the present invention, after the location of the insulation fault is determined, insulation failure treatment can be carried out on the location of the insulation fault, for example, disconnecting the power supply at the location of the insulation fault, or displaying the location of the insulation fault through instruments, so as to facilitate timely inspection and maintenance by maintenance personnel.

[0065] The following description, in conjunction with specific embodiments of the present invention, provides a corresponding explanation of the vehicle insulation fault location detection method proposed in the embodiments of the present invention.

[0066] Specifically, in one embodiment of the present invention, when an insulation fault is determined to occur in the vehicle, and the insulation fault is an insulation fault in the overall vehicle state, the main relay pair and the fast charging relay pair are disconnected to separate the bus circuit at the vehicle end from the bus circuit at the battery pack end. Then, the insulation resistance value at the battery pack end is obtained through the insulation detection circuit. Based on the insulation resistance value at the battery pack end, it is determined whether the battery pack end is the location of the insulation fault. If the insulation resistance value at the battery pack end is less than a preset insulation threshold, the battery pack end is determined to be the location of the insulation fault; if the insulation resistance value at the battery pack end is greater than the preset insulation threshold, the entire vehicle end is determined to be the location of the insulation fault. In other words, in some embodiments of the present invention, when the vehicle insulation fault is an insulation fault in the overall vehicle state, and the insulation resistance value at the battery pack end detected by the insulation detection circuit is greater than the preset insulation threshold, the entire vehicle end can be directly determined to be the location of the insulation fault.

[0067] Furthermore, in another specific embodiment of the present invention, when it is determined that an insulation fault has occurred in the vehicle, and the insulation fault is an insulation fault during the fast charging process, the main relay pair and the fast charging relay pair are disconnected by controlling them to separate the bus circuits at the vehicle end and the fast charging end from the bus circuits at the battery pack end. Then, the insulation resistance value at the battery pack end is obtained through the insulation detection circuit, and the location of the insulation fault at the battery pack end is determined based on the insulation resistance value at the battery pack end. If the insulation resistance value at the battery pack end is less than a preset insulation threshold, then the battery pack end is determined to be an insulation fault location. If the insulation resistance value at the battery pack end is greater than a preset insulation threshold, the main relay is controlled to close, so that the bus circuit at the vehicle end is connected to the insulation detection circuit at the battery pack end. The insulation resistance value at the vehicle end is obtained through the insulation detection circuit. Based on the insulation resistance value at the vehicle end, it is determined whether the vehicle end is an insulation fault location. If the insulation resistance value at the vehicle end is less than the preset insulation threshold, the vehicle end is determined to be an insulation fault location. If the insulation resistance value at the vehicle end is greater than the preset insulation threshold, the fast charging end is determined to be an insulation fault location.

[0068] In summary, the vehicle insulation fault location detection method according to embodiments of the present invention, after determining that an insulation fault has occurred in the vehicle, controls the main relay pair and the fast charging relay pair to disconnect, and obtains the insulation resistance value at the battery pack end through an insulation detection circuit. Based on the insulation resistance value at the battery pack end, it is determined whether the battery panel end is an insulation fault location. Specifically, if the insulation resistance value at the battery pack end is less than a preset insulation threshold, the battery pack end is determined to be an insulation fault location; if the insulation resistance value at the battery pack end is greater than the preset insulation threshold, it controls the main relay pair to close, and obtains the insulation resistance value at the vehicle end through an insulation detection circuit. Based on the insulation resistance value at the vehicle end, it is determined whether the vehicle end is an insulation fault location. Specifically, if the insulation resistance value at the vehicle end is less than the preset insulation threshold, the vehicle end is determined to be an insulation fault location; if the insulation resistance value at the vehicle end is greater than the preset insulation threshold, the fast charging end is determined to be an insulation fault location. Therefore, the vehicle insulation fault location is accurately identified, thereby narrowing the fault investigation scope and improving investigation efficiency.

[0069] Based on the vehicle insulation fault location detection method of the foregoing embodiments of the present invention, the present invention also proposes a computer-readable storage medium storing a vehicle insulation fault location detection program thereon. When the vehicle insulation fault location detection program is executed by a processor, the vehicle insulation fault location detection method of the foregoing embodiments of the present invention is implemented.

[0070] It should be noted that the computer-readable storage medium of the present invention can implement specific implementation methods that correspond one-to-one with the aforementioned vehicle insulation fault location detection method of the present invention, and will not be described again here.

[0071] In summary, the computer-readable storage medium according to embodiments of the present invention, by executing the vehicle insulation fault location detection program stored thereon by a processor, can accurately identify the vehicle insulation fault location, thereby narrowing the scope of fault investigation and improving investigation efficiency.

[0072] Based on the vehicle insulation fault location detection method of the foregoing embodiments of the present invention, the present invention also proposes a power management system, including a memory and a processor. The memory stores a vehicle insulation fault location detection program, and when the processor executes the vehicle insulation fault location detection program, it implements the vehicle insulation fault location detection method of the foregoing embodiments of the present invention.

[0073] It should be noted that the power management system of this invention can implement specific implementation methods that correspond one-to-one with the vehicle insulation fault location detection method of the aforementioned embodiments of this invention, and will not be repeated here.

[0074] In summary, the power management system according to the embodiments of the present invention can accurately identify the location of vehicle insulation faults by executing the vehicle insulation fault location detection program stored in the memory by the processor, thereby narrowing the scope of fault investigation and improving the investigation efficiency.

[0075] Figure 5 This is a block diagram of a vehicle insulation fault location detection device according to an embodiment of the present invention.

[0076] like Figure 5 As shown, the vehicle insulation fault location detection device 100 includes: a control module 10, an acquisition module 20, and a judgment module 30.

[0077] Specifically, the control module 10 is used to control the main relay pair and the fast charging relay pair to disconnect after determining that an insulation fault has occurred in the vehicle; the acquisition module 20 is used to acquire the insulation resistance value of the battery pack end through the insulation detection circuit; the judgment module 30 is used to determine whether the battery pack end is an insulation fault location based on the insulation resistance value of the battery pack end; if the insulation resistance value of the battery pack end is less than a preset insulation threshold, then the battery pack end is determined to be an insulation fault location; if the insulation resistance value of the battery pack end is greater than the preset insulation threshold, then the control module 10 is also used to control the main relay pair to close; the acquisition module 20 is also used to acquire the insulation resistance value of the whole vehicle end through the insulation detection circuit; the judgment module 30 is also used to determine whether the whole vehicle end is an insulation fault location based on the insulation resistance value of the whole vehicle end; if the insulation resistance value of the whole vehicle end is less than the preset insulation threshold, then the whole vehicle end is determined to be an insulation fault location; if the insulation resistance value of the whole vehicle end is greater than the preset insulation threshold, then the fast charging end is determined to be an insulation fault location.

[0078] Furthermore, the acquisition module 20 is also used to acquire the positive insulation resistance value of the battery through the insulation detection circuit and the insulation resistance of the positive battery, and to acquire the negative insulation resistance value of the battery through the insulation detection circuit and the insulation resistance of the negative battery.

[0079] Furthermore, the judgment module 30 is also used to determine whether the insulation resistance value of the positive terminal of the battery is less than a preset insulation threshold, or whether the insulation resistance value of the negative terminal of the battery is less than a preset insulation threshold; if the insulation resistance value of the positive terminal of the battery is less than the preset insulation threshold, or the insulation resistance value of the negative terminal of the battery is less than the preset insulation threshold, then the battery pack end is determined as the location of the insulation fault.

[0080] Furthermore, the acquisition module 20 is also used to acquire the positive insulation resistance value of the vehicle through the insulation detection circuit and the positive insulation resistance of the vehicle, and to acquire the negative insulation resistance value of the vehicle through the insulation detection circuit and the negative insulation resistance of the vehicle.

[0081] Furthermore, the judgment module 30 is also used to determine whether the insulation resistance value of the positive terminal of the vehicle is less than a preset insulation threshold, or whether the insulation resistance value of the negative terminal of the vehicle is less than a preset insulation threshold; if the insulation resistance value of the positive terminal of the vehicle is less than the preset insulation threshold, or the insulation resistance value of the negative terminal of the vehicle is less than the preset insulation threshold, then the vehicle end is determined as the location of the insulation fault.

[0082] Furthermore, the control module 10 is also used to perform insulation failure processing on the location of the insulation fault.

[0083] It should be noted that the vehicle insulation fault location detection device 100 of the present invention can realize specific implementation methods that correspond one-to-one with the vehicle insulation fault location detection method of the aforementioned present invention, and will not be described again here.

[0084] In summary, the vehicle insulation fault location detection device according to an embodiment of the present invention, after determining that an insulation fault has occurred in the vehicle, controls the main relay pair and the fast charging relay pair to disconnect via the control module, and acquires the insulation resistance value of the battery pack end via the insulation detection circuit via the acquisition module. The judgment module then determines whether the battery pack end is an insulation fault location based on the insulation resistance value of the battery pack end. Specifically, if the insulation resistance value of the battery pack end is less than a preset insulation threshold, the battery pack end is determined to be an insulation fault location; if the insulation resistance value of the battery pack end is greater than the preset insulation threshold, the control module controls the main relay pair to close, and the acquisition module acquires the insulation resistance value of the entire vehicle end via the insulation detection circuit. The judgment module then determines whether the entire vehicle end is an insulation fault location based on the insulation resistance value of the entire vehicle end. Specifically, if the insulation resistance value of the entire vehicle end is less than the preset insulation threshold, the entire vehicle end is determined to be an insulation fault location; if the insulation resistance value of the entire vehicle end is greater than the preset insulation threshold, the fast charging end is determined to be an insulation fault location. Therefore, the vehicle insulation fault location is accurately identified, thereby narrowing the fault investigation scope and improving investigation efficiency.

[0085] Figure 6 This is a block diagram of a vehicle according to an embodiment of the present invention.

[0086] like Figure 6 As shown, the vehicle 1000 includes a power management system as described in the foregoing embodiments of the present invention, or an insulation fault location detection device 100 for the vehicle as described in the foregoing embodiments of the present invention.

[0087] It should be noted that the vehicle 1000 in this embodiment of the invention, by adopting the insulation fault location detection device 100 of the vehicle in the aforementioned embodiment of the invention, can realize a specific implementation method that corresponds one-to-one with the insulation fault location detection method of the vehicle in the aforementioned embodiment of the invention, and will not be described again here.

[0088] In summary, the vehicle according to the embodiments of the present invention, by employing the aforementioned insulation fault location detection device for the vehicle according to the embodiments of the present invention, can accurately identify the location of insulation faults in the vehicle, thereby narrowing the scope of fault investigation and improving investigation efficiency.

[0089] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0090] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0091] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0092] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0093] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0094] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0095] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0096] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for detecting the location of insulation faults in a vehicle, characterized in that, The vehicle includes a battery pack end, a vehicle end, a fast charging end, a main relay pair disposed between the battery pack end and the vehicle end, and a fast charging relay pair disposed between the vehicle end and the fast charging end. The battery pack end includes an insulation detection circuit and further includes battery positive electrode insulation resistance and battery negative electrode insulation resistance. The method includes: After determining that an insulation fault has occurred in the vehicle, the main relay pair and the fast-charging relay pair are disconnected, and the insulation resistance value of the battery pack terminal is obtained through the insulation detection circuit. Based on the insulation resistance value of the battery pack terminal, it is determined whether the battery pack terminal is an insulation fault location. The insulation resistance value of the battery pack terminal includes the insulation resistance value of the positive terminal and the insulation resistance value of the negative terminal. Obtaining the insulation resistance value of the battery pack terminal through the insulation detection circuit includes: The insulation resistance value of the positive electrode of the battery is obtained by means of the insulation detection circuit and the insulation resistance of the positive electrode of the battery, and the insulation resistance value of the negative electrode of the battery is obtained by means of the insulation detection circuit and the insulation resistance of the negative electrode of the battery. The step of determining whether the battery pack terminal is an insulation fault location based on the insulation resistance value of the battery pack terminal includes: Determine whether the insulation resistance value of the positive electrode of the battery is less than a preset insulation threshold, or whether the insulation resistance value of the negative electrode of the battery is less than the preset insulation threshold; If the insulation resistance value of the positive electrode of the battery is less than the preset insulation threshold, or if the insulation resistance value of the negative electrode of the battery is greater than the preset insulation threshold, then the battery pack terminal is determined as the location of the insulation fault. If the insulation resistance value at the battery pack end is less than the preset insulation threshold, the battery pack end is determined to be the insulation fault location. If the insulation resistance value at the battery pack end is greater than the preset insulation threshold, the main relay is controlled to close, and the insulation resistance value at the vehicle end is obtained through the insulation detection circuit, so as to determine whether the vehicle end is an insulation fault location based on the insulation resistance value at the vehicle end. If the insulation resistance value of the vehicle end is less than the preset insulation threshold, then the vehicle end is determined to be the insulation fault location; if the insulation resistance value of the vehicle end is greater than the preset insulation threshold, then the fast charging end is determined to be the insulation fault location.

2. The method for detecting the location of insulation faults in a vehicle according to claim 1, characterized in that, The vehicle terminal also includes the vehicle's positive insulation resistance and the vehicle's negative insulation resistance. The insulation resistance value of the vehicle terminal includes the vehicle's positive insulation resistance value and the vehicle's negative insulation resistance value. Obtaining the insulation resistance value of the vehicle terminal through the insulation detection circuit includes: The positive insulation resistance value of the vehicle is obtained by means of the insulation detection circuit and the positive insulation resistance value of the vehicle, and the negative insulation resistance value of the vehicle is obtained by means of the insulation detection circuit and the negative insulation resistance value of the vehicle.

3. The method for detecting the location of insulation faults in a vehicle according to claim 2, characterized in that, The step of determining whether the vehicle terminal is an insulation fault location based on the insulation resistance value of the vehicle terminal includes: Determine whether the insulation resistance value of the positive electrode of the vehicle is less than the preset insulation threshold, or whether the insulation resistance value of the negative electrode of the vehicle is less than the preset insulation threshold; If the insulation resistance value of the positive terminal of the vehicle is less than the preset insulation threshold, or if the insulation resistance value of the negative terminal of the vehicle is less than the preset insulation threshold, then the vehicle terminal is determined as the location of the insulation fault.

4. The method for detecting the location of insulation faults in a vehicle according to claim 1, characterized in that, The method further includes: Insulation failure treatment is performed on the location of the insulation fault.

5. A computer-readable storage medium, characterized in that, It stores a vehicle insulation fault location detection program, which, when executed by a processor, implements the vehicle insulation fault location detection method as described in any one of claims 1-4.

6. A power management system, comprising a memory and a processor, wherein the memory stores a vehicle insulation fault location detection program, and the processor, when executing the vehicle insulation fault location detection program, implements the vehicle insulation fault location detection method as described in any one of claims 1-4.

7. A device for detecting the location of insulation faults in a vehicle, characterized in that, The vehicle includes a battery pack end, a vehicle end, a fast charging end, a main relay pair disposed between the battery pack end and the vehicle end, and a fast charging relay pair disposed between the vehicle end and the fast charging end. The battery pack end includes an insulation detection circuit, and the battery pack end also includes a battery positive electrode insulation resistance and a battery negative electrode insulation resistance. The device includes: The control module is used to control the main relay pair and the fast charging relay pair to disconnect after determining that an insulation fault has occurred in the vehicle; The acquisition module is used to acquire the insulation resistance value of the battery pack end through the insulation detection circuit. The insulation resistance value of the battery pack end includes the insulation resistance value of the positive electrode and the insulation resistance value of the negative electrode. The acquisition module is further configured to acquire the insulation resistance value of the positive electrode of the battery through the insulation detection circuit and the insulation resistance of the positive electrode of the battery, and to acquire the insulation resistance value of the negative electrode of the battery through the insulation detection circuit and the insulation resistance of the negative electrode of the battery; the judgment module is configured to determine whether the battery pack end is an insulation fault location based on the insulation resistance value of the battery pack end; if the insulation resistance value of the battery pack end is less than a preset insulation threshold, then the battery pack end is determined to be the insulation fault location; If the insulation resistance value at the battery pack terminal is greater than the preset insulation threshold, the control module is further configured to control the main relay to close. The judgment module is further configured to determine whether the insulation resistance value of the positive electrode of the battery is less than the preset insulation threshold, or whether the insulation resistance value of the negative electrode of the battery is less than the preset insulation threshold; if the insulation resistance value of the positive electrode of the battery is less than the preset insulation threshold, or the insulation resistance value of the negative electrode of the battery is less than the preset insulation threshold, then the battery pack end is determined as the insulation fault location. The acquisition module is also used to acquire the insulation resistance value of the whole vehicle end through the insulation detection circuit; The judgment module is further configured to determine whether the vehicle end is an insulation fault location based on the insulation resistance value of the vehicle end; if the insulation resistance value of the vehicle end is less than the preset insulation threshold, then the vehicle end is determined to be the insulation fault location; if the insulation resistance value of the vehicle end is greater than the preset insulation threshold, then the fast charging end is determined to be the insulation fault location.

8. A vehicle, characterized in that, The vehicle includes the insulation fault location detection device for a vehicle as described in claim 7.

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