Fault positioning method and device, electronic equipment and storage medium

Abstract

The invention provides a fault positioning method and device, electronic equipment and a storage medium, and the method comprises the steps: determining the state information of the voltage drop of a vehicle power supply system, the state information comprises a normal state, an abnormal state or an invalid state, and the vehicle power supply system comprises a power supply, power distribution equipment and a load; if the state information is an abnormal state, determining a first voltage drop between the output voltage of the power supply and the output voltage of the power distribution equipment, and determining a second voltage drop between the output voltage of the power distribution equipment and the input voltage of the load; and performing fault positioning on the vehicle power supply system according to the first voltage drop and the second voltage drop. According to the invention, the voltage drop between the power supply and the power distribution device and the voltage drop between the power distribution device and the load are calculated in a segmented manner, so that the fault point with abnormal voltage drop can be accurately positioned, the troubleshooting time can be greatly shortened, and the working efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobiles, and more particularly, to a method, apparatus, electronic device, and storage medium for fault location. Background Art

[0002] In the existing vehicle circuit voltage drop test method, an external test device is usually used to simulate the test of the vehicle's power supply wire harness. By simulating conditions such as the vehicle operation environment and the working current of the electrical appliances, the voltage drop data on the power supply wire harness is obtained for voltage drop fault analysis. However, there must be differences between the test environment built by the simulation test and the actual state of the vehicle, and the working current of the electrical appliances is related to the user's vehicle usage habits and is also difficult to truly simulate; moreover, the external test device can only test the power supply wire harness exposed outside, and there are also voltage drops between the connectors of the wire harness and the electrical appliances, between the connectors of the power supply device, and even inside the power supply device and the internal circuit of the electrical appliances. Therefore, how to accurately locate the fault point with abnormal voltage drop has become an urgent problem to be solved. Summary of the Invention

[0003] In view of this, embodiments of the present application propose a method, apparatus, electronic device, and storage medium for fault location to improve the above problems.

[0004] According to the first aspect of the embodiments of the present application, a method for fault location is provided. The method includes: determining the status information of the voltage drop of the vehicle power supply system, where the status information includes a normal state, an abnormal state, or an invalid state, and the vehicle power supply system includes a power supply, a power distribution device, and a load; if the status information is the abnormal state, determining a first voltage drop between the output voltage of the power supply and the output voltage of the power distribution device, and determining a second voltage drop between the output voltage of the power distribution device and the input voltage of the load; and performing fault location on the vehicle power supply system according to the first voltage drop and the second voltage drop.

[0005] According to the second aspect of the embodiments of the present application, a device for fault location is provided. The device includes: a status information determination module for determining the status information of the voltage drop of the vehicle power supply system, where the status information includes a normal state, an abnormal state, or an invalid state, and the vehicle power supply system includes a power supply, a power distribution device, and a load; a voltage drop determination module for determining a first voltage drop between the output voltage of the power supply and the output voltage of the power distribution device, and determining a second voltage drop between the output voltage of the power distribution device and the input voltage of the load if the status information is the abnormal state; and a fault location module for performing fault location on the vehicle power supply system according to the first voltage drop and the second voltage drop.

[0006] According to a third aspect of the embodiments of the present application, an electronic device is provided, including: a processor; a memory, on which computer-readable instructions are stored, and when the computer-readable instructions are executed by the processor, the method for fault location as described above is implemented.

[0007] According to a fourth aspect of the embodiments of the present application, a computer-readable storage medium is provided, on which computer-readable instructions are stored, and when the computer-readable instructions are executed by a processor, the method for fault location as described above is implemented.

[0008] In the solution of the present application, the state information of the voltage drop of the vehicle power supply system is first determined. When the state information of the voltage drop of the vehicle power supply system is in an abnormal state, the first voltage drop between the output voltage of the power supply and the output voltage of the power distribution device and the second voltage drop between the output voltage of the power distribution device and the input voltage of the load are respectively determined, so that the fault location of the vehicle power supply system can be carried out according to the first voltage drop and the second voltage drop. The solution of the present application can accurately locate the fault point with abnormal voltage drop by calculating the voltage drop in segments between the power supply and the power distribution device and between the power distribution device and the load, which can greatly shorten the time for fault troubleshooting and improve work efficiency.

[0009] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings here are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0011] Figure 1 is a schematic diagram of a vehicle power supply system shown according to an embodiment of the present application.

[0012] Figure 2 is a schematic flowchart of a method for fault location shown according to an embodiment of the present application.

[0013] Figure 3 is a schematic flowchart of a method for fault location shown according to another embodiment of the present application.

[0014] Figure 4 is a schematic flowchart of a method for fault location shown according to still another embodiment of the present application.

[0015] Figure 5It is a schematic flowchart of a fault location method shown according to another embodiment of the present application.

[0016] Figure 6 It is a schematic flowchart of the specific steps of step 430 shown according to an embodiment of the present application.

[0017] Figure 7 It is a schematic flowchart of a fault location method shown according to a certain embodiment of the present application.

[0018] Figure 8 It is a schematic diagram of data upload shown according to an embodiment of the present application.

[0019] Figure 9 It is a schematic flowchart of a fault location method shown according to an embodiment of the present application.

[0020] Figure 10 It is a block diagram of a fault location device shown according to an embodiment of the present application.

[0021] Figure 11 It is a hardware structure diagram of an electronic device shown according to an embodiment of the present application.

[0022] Through the above-mentioned drawings, specific embodiments of the present invention have been shown, and there will be more detailed descriptions hereinafter. These

[0023] drawings and written descriptions are not intended to limit the scope of the inventive concept in any way, but to illustrate the concept of the present invention to those skilled in the art through specific embodiments. Detailed Description of the Specific Embodiments

[0024] Now, example embodiments will be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0026] In addition, the described features, structures, or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of the present application. However, those skilled in the art will realize that the technical solutions of the present application may be practiced without one or more of the specific details, or other methods, devices, steps, etc. may be adopted. In other cases, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the present application.

[0027] The block diagrams shown in the drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices. The flowcharts shown in the drawings are merely illustrative and do not necessarily include all the content and operations / steps, nor are they necessarily executed in the described order. For example, some operations / steps may be decomposed, while some operations / steps may be combined or partially combined, so the actual execution order may change according to the actual situation.

[0028] Figure 1 is a schematic diagram of a vehicle power supply system shown according to an embodiment of the present application, as Figure 1 shown, the vehicle power supply system includes a power supply A1, a power distribution device A2, and a load A3. Among them, the power supply A1 is connected to the power distribution device A2 through a wire, and the power distribution device A2 and the load A3 are connected through a wire.

[0029] Please refer to Figure 2 , Figure 2 shows a method for fault location provided by an embodiment of the present application. In a specific embodiment, the method for fault location can be applied to a fault location device 600 as Figure 10 shown and an electronic device 700 configured with the fault location device 600 ( Figure 11 ). The specific process of this embodiment will be described below. Of course, it can be understood that this method can be executed by an in-vehicle terminal with computing and processing capabilities. The following will elaborate in detail on the Figure 2 process shown. The method for fault location may specifically include the following steps:

[0030] Step 110, determine the status information of the voltage drop of the vehicle power supply system, where the status information includes a normal state, an abnormal state, or an invalid state, and the vehicle power supply system includes a power supply, a power distribution device, and a load.

[0031] As a way, the power supply of the vehicle power supply system can be used to supply power to the loads of the vehicle, and at the same time, it can also detect the output voltage of the power supply in real time and send the output voltage to the power distribution equipment in the vehicle power supply system; the power distribution equipment is used to perform intelligent power distribution according to the voltage output by the power supply and the loads, so as to supply power to the loads, and is used to detect the power distribution output voltage in real time; the loads are electrical appliances in the vehicle, and the loads can also be used to detect the input voltage at the loads in real time and feedback the input voltage to the power distribution equipment, so that the power distribution equipment can determine the status information of the vehicle power supply system based on the input voltage at the loads and the output voltage of the power supply.

[0032] Optionally, since there is a certain loss when the voltage passes through the wires between the power supply and the power distribution equipment and between the power distribution equipment and the loads, this will cause a certain error between the input voltage monitored at the loads and the expected voltage. That is, when the voltage drop of the vehicle power supply system is in a normal state, but due to the loss within a certain range, and when the vehicle power supply system fails, the voltage drop of the vehicle power supply system is different from the voltage drop in the normal state and is much larger than the voltage drop in the normal state. Therefore, the fault location can be determined through the status information of the voltage drop of the vehicle power supply system.

[0033] Optionally, a voltage threshold can be preset in advance. Thus, after detecting the input voltage of the load at the loads, the input voltage of the load can be compared with the voltage threshold to determine the status information of the voltage drop of the vehicle power supply system.

[0034] Step 120, if the status information is the abnormal state, determine the first voltage drop between the output voltage of the power supply and the output voltage of the power distribution equipment, and determine the second voltage drop between the output voltage of the power distribution equipment and the input voltage of the load.

[0035] As a way, when the status information indicates that the status of the vehicle power supply system is an abnormal state, it can be determined that the vehicle power supply system has a fault. In order to accurately determine the fault location, the voltage drops of each power supply section can be calculated respectively, and thus the fault location can be determined based on the voltage drops of each power supply section.

[0036] Optionally, in the vehicle power supply system, there is a first power supply section from the power supply to the power distribution equipment and a second power supply section from the power distribution equipment to the loads. Thus, the first voltage drop of the first power supply section can be determined based on the output voltage of the power supply and the output voltage of the power distribution equipment, and the first voltage drop of the first power supply section can be determined based on the output voltage of the power distribution equipment and the input voltage of the loads.

[0037] Optionally, the voltage difference between the output voltage of the power supply and the output voltage of the power distribution equipment can be determined as the first voltage drop, that is, based on the formula ΔV1 = V b-V c to determine the first voltage drop, where V b is the output voltage of the power supply, V c is the output voltage of the power distribution device, and ΔV1 is the first voltage drop. Optionally, the voltage difference between the output voltage of the power distribution device and the input voltage of the load can be determined as the second voltage drop, that is, based on the formula ΔV2 = V c -V a to determine the second voltage drop, where V a is the input voltage of the load, and ΔV2 is the second voltage drop.

[0038] Step 130, perform fault location on the vehicle power supply system according to the first voltage drop and the second voltage drop.

[0039] As a way, if the first voltage drop is greater than the first voltage value corresponding to the first power supply section from the power supply to the power distribution device, it can be determined that there is an abnormal voltage drop fault in the first power supply section, so as to realize fault location of the vehicle power supply system. Similarly, if the second voltage drop is greater than the second voltage value corresponding to the second power supply section from the power distribution device to the load, it can be determined that there is an abnormal voltage drop fault in the second power supply section, so as to realize fault location of the vehicle power supply system.

[0040] Optionally, when the first voltage drop and / or the second voltage drop is greater than the corresponding voltage value, it can be determined that there may be an abnormal voltage drop caused by problems such as wire length or wire resistance in the corresponding power supply section, so as to perform fault location on the corresponding power supply section, which is convenient for replacing the located wire to recover from the fault.

[0041] In the embodiments of the present application, first determine the status information of the voltage drop of the vehicle power supply system. When the status information of the voltage drop of the vehicle power supply system is in an abnormal state, respectively determine the first voltage drop between the output voltage of the power supply and the output voltage of the power distribution device and the second voltage drop between the output voltage of the power distribution device and the input voltage of the load, so as to be able to perform fault location on the vehicle power supply system according to the first voltage drop and the second voltage drop. The solution of the present application can accurately locate the fault point of the abnormal voltage drop by calculating the voltage drop in segments between the power supply and the power distribution device, and between the power distribution device and the load, which can greatly shorten the time for fault troubleshooting and improve work efficiency.

[0042] Please refer to Figure 3 , Figure 3 shows the fault location method provided by an embodiment of the present application. Next, the following will be elaborated in detail for the Figure 3 shown process. The fault location method may specifically include the following steps:

[0043] Step 210, determine the status information of the voltage drop of the vehicle power supply system, where the status information includes a normal state, an abnormal state, or an invalid state, and the vehicle power supply system includes a power supply, power distribution equipment, and a load.

[0044] Step 220, if the status information is the abnormal state, determine the first voltage drop between the output voltage of the power supply and the output voltage of the power distribution equipment, and determine the second voltage drop between the output voltage of the power distribution equipment and the input voltage of the load.

[0045] Among them, for the specific step descriptions of steps 210 - 220, reference can be made to steps 110 - 120, and no further elaboration will be provided here.

[0046] Step 230, obtain the output current of the power supply, the resistance of the power supply, and the wire length of the power supply.

[0047] As a method, in order to determine whether there is an abnormal voltage drop fault in the first power supply section from the power supply to the power distribution equipment, the standard value of the voltage drop under normal loss corresponding to the first power supply section from the power supply to the power distribution equipment can be determined first. Optionally, in order to determine the standard value, the output current of the power supply, the resistance of the power supply, and the wire length of the power supply of the vehicle power supply system can be obtained first. Among them, the resistance of the power supply is the unit resistance of the wire of the power supply, and the unit resistance of the wire is related to the wire diameter. Therefore, the unit resistance of the wire of the power supply can be determined by looking up the table according to the wire specification, as shown in Table 1 below.

[0048] Table 1 Wire Specification Table

[0049]

[0050] Step 240, determine the first standard voltage according to the output current of the power supply, the resistance of the power supply, and the wire length of the power supply.

[0051] As a method, in order to determine the first standard voltage of the first power supply section from the power supply to the power distribution equipment under the current wire, the number of wire harness terminals of the power supply and the number of wire harness solder joints of the power supply can also be determined. Among them, the wire harness terminal of the power supply is a kind of joint device used to connect between the power supply device and the power distribution equipment or the wires in the power supply circuit, and the wire harness solder joint of the power supply is the solder joint corresponding to connecting the wire harness terminal to the power supply and the power distribution equipment.

[0052] Optionally, it can be calculated by the formula V 标1 =I1*(r1*L1 + 10.5N1 + M1)*10 ―3to determine the first standard voltage, where I1 is the output current of the power supply (unit: A), L1 is the wire length of the power supply (unit: m), r1 is the resistance of the power supply (unit: Ω / Km), N1 is the number of harness terminals of the power supply, M1 is the number of harness solder joints of the power supply, and V 标1 is the first standard voltage.

[0053] Step 250, if the first voltage drop is less than or equal to the first standard voltage, it is determined that the power supply has not failed.

[0054] As a way, when the first voltage drop is less than or equal to the first standard voltage, it can be determined that in the first power supply section from the power supply to the power distribution device, the voltage loss is within the expected range. Therefore, it can be determined that there is no abnormal voltage drop fault at the power supply.

[0055] Step 260, if the first voltage drop is greater than the first standard voltage, it is determined that the power supply has failed.

[0056] As a way, when the first voltage drop is greater than the first standard voltage, it can be determined that in the first power supply section from the power supply to the power distribution device, the voltage loss is not within the expected range. Therefore, it can be determined that there is an abnormal voltage drop fault at the power supply.

[0057] In this embodiment, the first standard voltage can be determined first according to the output current of the power supply, the resistance of the power supply, and the wire length of the power supply. In this way, if the first voltage drop is less than or equal to the first standard voltage, it is determined that the power supply has not failed, or if the first voltage drop is greater than the first standard voltage, it is determined that the power supply has failed, so as to realize the positioning of whether there is a voltage drop fault in the power supply section from the power supply to the power distribution device.

[0058] Please refer to Figure 4 , Figure 4 which shows the fault location method provided by an embodiment of the present application. The following will elaborate in detail on the Figure 4 shown process. The fault location method may specifically include the following steps:

[0059] Step 310, determine the status information of the voltage drop of the vehicle power supply system, where the status information includes a normal state, an abnormal state, or an invalid state, and the vehicle power supply system includes a power supply, a power distribution device, and a load.

[0060] Step 320, if the status information is the abnormal state, determine the first voltage drop between the output voltage of the power supply and the output voltage of the power distribution device, and determine the second voltage drop between the output voltage of the power distribution device and the input voltage of the load.

[0061] Among them, for the specific step descriptions from step 310 to step 320, reference can be made to step 110 to step 120, and no further elaboration will be provided here.

[0062] Step 330: Obtain the output current of the power distribution device, the resistance of the power distribution device, and the wire length of the power distribution device.

[0063] As a method, in order to determine whether there is an abnormal voltage drop fault in the second power supply section from the power distribution device to the load, the standard value of the voltage drop under normal loss corresponding to the second power supply section from the power distribution device to the load can be determined first. Optionally, in order to determine the standard value, the output current of the power distribution device of the vehicle power supply system, the resistance of the power distribution device, and the wire length of the power distribution device can be obtained first. Among them, the resistance of the power distribution device is the unit resistance of the wire of the power distribution device, and the unit resistance of the wire is related to the wire diameter. Therefore, the unit resistance of the wire of the power distribution device can be determined by looking up the table according to the wire specification, as shown in Table 1 above.

[0064] Step 340: Determine the second standard voltage according to the output current of the power distribution device, the resistance of the power distribution device, and the wire length of the power distribution device.

[0065] As a method, in order to determine the second standard voltage of the second power supply section from the power distribution device to the load under the current wire, the number of wire harness terminals of the power distribution device and the number of wire harness solder joints of the power distribution device can also be determined. Among them, the wire harness terminal of the power distribution device is a joint device used to connect between the power distribution device and the load or the wires in the power distribution device circuit, and the wire harness solder joint of the power distribution device is the solder joint corresponding to connecting the wire harness terminal to the power distribution device and the load.

[0066] Optionally, the second standard voltage can be determined by the formula V 标2 = I2 * (r2 * L2 + 10.5N2 + M2) * 10 ―3 where I2 is the output current of the power distribution device (unit: A), L2 is the wire length of the power distribution device (unit: m), r2 is the resistance of the power distribution device (unit: Ω / Km), N2 is the number of wire harness terminals of the power distribution device, M2 is the number of wire harness solder joints of the power distribution device, and V 标2 is the second standard voltage.

[0067] Step 350: If the second voltage drop is less than or equal to the second standard voltage, determine that the power distribution device has not failed.

[0068] As a method, when the second voltage drop is less than or equal to the second standard voltage, it can be determined that the voltage loss in the second power supply section from the power distribution device to the load is within the expected range. Therefore, it can be determined that there is no abnormal voltage drop fault at the power distribution device.

[0069] Step 360: If the second voltage drop is greater than the second standard voltage, it is determined that a fault has occurred in the power distribution device.

[0070] As a way, when the second voltage drop is greater than the second standard voltage, it can be determined that the voltage loss in the second power supply section from the power distribution device to the load is not within the desired range. Therefore, it can be determined that a voltage drop abnormal fault has occurred at the power distribution device.

[0071] In this embodiment, in this embodiment, the second standard voltage can be determined first according to the output current of the power distribution device, the resistance of the power distribution device, and the wire length of the power distribution device. In this way, if the second voltage drop is less than or equal to the second standard voltage, it is determined that no fault has occurred in the power distribution device, or if the second voltage drop is greater than the second standard voltage, it is determined that a fault has occurred in the power distribution device, so as to locate whether a voltage drop fault has occurred in the power supply section from the power distribution device to the load.

[0072] Please refer to Figure 5 , Figure 5 which shows a fault location method provided by an embodiment of the present application. The following will elaborate in detail on the Figure 5 shown process. The fault location method may specifically include the following steps:

[0073] Step 410: Obtain the input voltage of the load.

[0074] As a way, a voltage detection device can be set at the load, and in this way, the input voltage of the load can be obtained through this voltage detection device.

[0075] Step 420: Determine the magnitude relationship between the input voltage of the load and a preset voltage value.

[0076] As a way, in order to determine whether it is necessary to perform voltage drop abnormal fault location on the vehicle power supply system, it is necessary to first determine whether the voltage drop of the vehicle power supply system is in an abnormal state. Therefore, it is necessary to determine the status information of the voltage drop of the vehicle power supply system. Furthermore, the magnitude relationship between the input voltage of the load and the preset voltage value can be determined first, and based on this magnitude relationship, the status information of the voltage drop of the vehicle power supply system can be determined. Optionally, the preset voltage value can be set according to the specifications of the wires used in the vehicle power supply system and the desired voltage loss.

[0077] Step 430: Determine the status information of the voltage drop of the vehicle power supply system according to the magnitude relationship.

[0078] As a way, the magnitude relationship may include that the input voltage of the load is greater than a preset voltage value, the input voltage of the load is less than the preset voltage value, and the input voltage of the load is equal to the preset voltage value. Optionally, since the preset voltage value is the voltage value expected to be detected at the load considering the loss (i.e., voltage drop) during voltage transmission, therefore, the state information of the voltage drop of the vehicle power supply system can be determined according to the magnitude relationship between the input voltage of the load and the preset voltage value.

[0079] In some embodiments, as Figure 6 shown, step 430 includes:

[0080] Step 431, if the magnitude relationship indicates that the input voltage of the load is greater than or equal to the preset voltage value, determine that the state information of the voltage drop of the vehicle power supply system is the normal state.

[0081] As a way, when the magnitude relationship indicates that the input voltage of the load is greater than or equal to the preset voltage value, it can be determined that the voltage loss of the vehicle power supply system is within the expected range. Therefore, the state information of the voltage drop of the vehicle power supply system can be determined to be the normal state.

[0082] Step 432, if the magnitude relationship indicates that the input voltage of the load is less than the preset voltage value, determine that the state information of the voltage drop of the vehicle power supply system is the abnormal state or the invalid state.

[0083] As a way, when the magnitude relationship indicates that the input voltage of the load is less than the preset voltage value, it can be determined that the voltage loss of the vehicle power supply system is not within the expected range. However, the reasons for the input voltage of the load of the vehicle power supply system being less than the preset voltage value may include abnormal faults in the voltage drop of the vehicle power supply system, faults such as short circuits or open circuits in the vehicle power supply system. Among them, when an abnormal fault in the voltage drop of the vehicle power supply system occurs, the state information of the voltage drop of the vehicle power supply system is the abnormal state; when faults such as short circuits or open circuits occur in the vehicle power supply system, the state information of the voltage drop of the vehicle power supply system is the invalid state.

[0084] Optionally, in order to specifically determine whether the state information of the voltage drop of the vehicle power supply system is the abnormal state or the invalid state, the input voltage of the load and the output voltage of the power supply can also be subtracted to obtain a voltage difference, and this voltage difference can be used to determine with a difference threshold. For example, when the voltage difference is greater than or equal to the difference threshold, it can be determined that the state information of the voltage drop of the vehicle power supply system is the invalid state; when the voltage difference is less than the difference threshold, it can be determined that the state information of the voltage drop of the vehicle power supply system is the abnormal state.

[0085] Optionally, when the status information of the voltage drop of the vehicle power supply system is determined to be an abnormal state, it can be determined that a voltage drop abnormal fault has occurred in the vehicle power supply system, and then the fault location of the voltage drop abnormal fault can be carried out; when the status information of the voltage drop of the vehicle power supply system is determined to be an invalid state, it can be determined that faults such as short circuit or open circuit have occurred in the vehicle power supply system, and at this time, there is no need to carry out fault location on the voltage drop abnormal fault.

[0086] In some embodiments, step 432 includes: determining the output voltage of the power supply and the rated output voltage of the power supply; if the ratio of the output voltage of the power supply to the rated output voltage of the power supply is greater than or equal to the ratio threshold, it is determined that the status information of the voltage drop of the vehicle power supply system is the abnormal state; if the ratio of the output voltage of the power supply to the rated output voltage of the power supply is less than the ratio threshold, it is determined that the status information of the voltage drop of the vehicle power supply system is the invalid state.

[0087] As a way, the rated output voltage of the power supply can be set before the vehicle power supply system leaves the factory and is related to the specifications of the power supply. It can be understood that the rated output voltage of the power supply is the maximum output voltage of the power supply and can be directly obtained. Optionally, a voltage detection device can be set at the output end of the power supply to determine the output voltage of the power supply.

[0088] Optionally, when the power supply outputs voltage, there may be a certain loss in the rated output voltage after output due to the loss of the internal circuit of the power supply. Therefore, the voltage loss ratio of the power supply can be set based on the rules of the power supply. Furthermore, the status information of the voltage drop of the vehicle power supply system can be determined as an invalid state or an abnormal state by determining the ratio of the output voltage of the power supply to the rated output voltage of the power supply and the ratio threshold of the voltage loss ratio of the power supply.

[0089] Optionally, when the ratio of the output voltage of the power supply to the rated output voltage of the power supply is greater than or equal to the ratio threshold, it can be determined that other faults have occurred in the power supply, resulting in the power supply being unable to output sufficient voltage. Furthermore, it can be determined that the status information of the voltage drop of the vehicle power supply system is the invalid state.

[0090] Optionally, when the ratio of the output voltage of the power supply to the rated output voltage of the power supply is less than the ratio threshold, it can be determined that there is a voltage drop fault in the power supply. Furthermore, it can be determined that the status information of the voltage drop of the vehicle power supply system is the abnormal state.

[0091] Please continue to refer to Figure 5, Step 440, determine the status information of the voltage drop of the vehicle power supply system, where the status information includes a normal state, an abnormal state, or an invalid state, and the vehicle power supply system includes a power supply, power distribution equipment, and a load.

[0092] Step 450, if the status information is the abnormal state, determine the first voltage drop between the output voltage of the power supply and the output voltage of the power distribution equipment, and determine the second voltage drop between the output voltage of the power distribution equipment and the input voltage of the load.

[0093] Step 460, perform fault location on the vehicle power supply system according to the first voltage drop and the second voltage drop.

[0094] Among them, the specific step descriptions of steps 440 - 460 can refer to steps 110 - 130, and will not be elaborated here.

[0095] In this embodiment, the status information of the voltage drop of the vehicle power supply system is determined according to the magnitude relationship between the input voltage of the load and the preset voltage value, so as to determine whether to perform the step of fault location for the voltage drop fault based on the status information of the voltage drop of the power supply system, ensuring the accuracy of the fault location for the voltage drop fault.

[0096] Please refer to Figure 7 , Figure 7 which shows the fault location method provided by an embodiment of the present application. The following will elaborate in detail on the Figure 7 shown process. The fault location method may specifically include the following steps:

[0097] Step 510, determine the status information of the voltage drop of the vehicle power supply system, where the status information includes a normal state, an abnormal state, or an invalid state, and the vehicle power supply system includes a power supply, power distribution equipment, and a load.

[0098] Step 520, if the status information is the abnormal state, determine the first voltage drop between the output voltage of the power supply and the output voltage of the power distribution equipment, and determine the second voltage drop between the output voltage of the power distribution equipment and the input voltage of the load.

[0099] Step 530, perform fault location on the vehicle power supply system according to the first voltage drop and the second voltage drop.

[0100] Among them, the specific step descriptions of steps 510 - 530 can refer to steps 110 - 130, and will not be elaborated here.

[0101] Step 540: Generate a voltage drop status signal according to the status information and upload the voltage drop status signal.

[0102] As a way, to ensure that voltage drop fault analysis can be performed on the vehicle power supply system, after determining the status information, a voltage drop status signal can be generated according to the status information, and then the voltage drop status signal can be uploaded to the cloud server. As Figure 8 shown, the voltage drop status signal can be uploaded to the cloud server through the power distribution equipment in the vehicle power supply system.

[0103] Optionally, when the status information indicates that the voltage drop of the vehicle power supply system is in an abnormal state, generate a voltage drop abnormal signal VoltageDropSt = Abnormal; when the status information indicates that the voltage drop of the vehicle power supply system is in a normal state, generate a voltage drop normal signal VoltageDropSt = Normal; when the status information indicates that the voltage drop of the vehicle power supply system is in an invalid state, generate a voltage drop invalid signal to indicate that troubleshooting of the vehicle power supply system is required, where the voltage drop invalid signal is VoltageDropSt = Invalid.

[0104] Optionally, when the status information indicates that the voltage drop of the vehicle power supply system is in a normal state, the power distribution device also uploads the output voltage of the power supply, the output voltage of the power distribution equipment, and the input voltage data of the load to the cloud server; when the status information indicates that the voltage drop of the vehicle power supply system is in an abnormal state, upload the output voltage of the power supply, the output voltage of the power distribution equipment, the input voltage of the load, and the fault location of the voltage drop fault to the cloud server. Optionally, the cloud server can integrate the fault data according to the received voltage drop status signal and count the number of vehicles with abnormal voltage drops and the frequency of faults.

[0105] In this embodiment, after fault location of the voltage drop abnormal fault of the vehicle power supply system, a voltage drop status signal can be generated according to the voltage drop status information of the vehicle power supply system, and the voltage drop status signal can be uploaded, so as to ensure that the cloud server can perform fault analysis according to the uploaded voltage drop status signal.

[0106] Figure 9 is a fault location method shown according to an embodiment of the present application, as Figure 9As shown, when the vehicle is powered on, the low-voltage power distribution system of the vehicle outputs electrical energy from the power supply. After being distributed by the intelligent power distribution device, it is input to the electrical appliances. Among them, the power supply detects the output voltage and current in real time, the intelligent power distribution device detects the output voltage and current in real time, and the electrical appliances detect the input voltage in real time. The intelligent power distribution device configures the rated output voltage of the power supply and configures the corresponding voltage drop threshold according to the requirements of each power distribution load. The intelligent power distribution device determines whether the voltage drop is in a normal state based on the input voltage of the electrical appliance received and the voltage drop threshold. When the input voltage of the electrical appliance is greater than or equal to the voltage drop threshold, it is determined that the voltage drop is normal; when the input voltage of the electrical appliance is less than the voltage drop threshold, the ratio between the output voltage of the power supply and the rated output voltage of the power supply is determined, and when the ratio is less than the preset ratio, it is determined that the voltage drop is invalid; when the ratio is greater than or equal to the preset ratio, it is determined that the voltage drop is abnormal.

[0107] When the voltage drop is abnormal, the intelligent power distribution device conducts voltage drop segmentation determination, that is, the intelligent power distribution device calculates the voltage drop of the power supply based on the received output voltage of the power supply and the detected distribution output voltage of itself, and compares the voltage drop of the power supply with the first standard value for judgment. When the voltage drop of the power supply is less than or equal to the first standard value, it is judged that the voltage drop of the power supply is normal; when the voltage drop of the power supply is greater than the first standard value, it is judged that the voltage drop of the power supply is abnormal.

[0108] The intelligent power distribution device calculates the voltage drop of the intelligent power distribution device based on the received input voltage of the electrical appliance and the detected distribution output voltage of itself, and compares the voltage drop of the intelligent power distribution device with the second standard value for judgment. When the voltage drop of the intelligent power distribution device is less than or equal to the second standard value, it is judged that the voltage drop of the intelligent power distribution device is normal; when the voltage drop of the intelligent power distribution device is greater than the second standard value, it is judged that the voltage drop of the intelligent power distribution device is abnormal.

[0109] Finally, the intelligent power distribution device issues a voltage drop status signal according to the determined voltage drop status and uploads it to the cloud.

[0110] Figure 10 is a block diagram of a fault location device shown according to an embodiment of the present application. As Figure 10 shown, the fault location device 600 includes: a status information determination module 610, a voltage drop determination module 620, and a fault location module 630.

[0111] A status information determination module 610 is configured to determine the status information of the voltage drop of the vehicle power supply system, where the status information includes a normal status, an abnormal status, or an invalid status, and the vehicle power supply system includes a power supply, power distribution equipment, and a load; a voltage drop determination module 620 is configured to, if the status information is the abnormal status, determine a first voltage drop between the output voltage of the power supply and the output voltage of the power distribution equipment, and determine a second voltage drop between the output voltage of the power distribution equipment and the input voltage of the load; a fault location module 630 is configured to perform fault location on the vehicle power supply system according to the first voltage drop and the second voltage drop.

[0112] In some embodiments, the fault location module 630 includes: a first acquisition sub-module, configured to acquire the output current of the power supply, the resistance of the power supply, and the wire length of the power supply; a first standard voltage determination sub-module, configured to determine a first standard voltage according to the output current of the power supply, the resistance of the power supply, and the wire length of the power supply; a first determination sub-module, configured to, if the first voltage drop is less than or equal to the first standard voltage, determine that the power supply has no fault; or a second determination sub-module, configured to, if the first voltage drop is greater than the first standard voltage, determine that the power supply has a fault.

[0113] In some other embodiments, the fault location module 630 includes: a second acquisition sub-module, configured to acquire the output current of the power distribution equipment, the resistance of the power distribution equipment, and the wire length of the power distribution equipment; a second standard voltage determination sub-module, configured to determine a second standard voltage according to the output current of the power distribution equipment, the resistance of the power distribution equipment, and the wire length of the power distribution equipment; a third determination sub-module, configured to, if the second voltage drop is less than or equal to the second standard voltage, determine that the power distribution equipment has no fault; or a fourth determination sub-module, configured to, if the second voltage drop is greater than the second standard voltage, determine that the power distribution equipment has a fault.

[0114] In some embodiments, the fault location device 600 further includes: an input voltage acquisition module, configured to acquire the input voltage of the load; a magnitude relationship determination module, configured to determine the magnitude relationship between the input voltage of the load and a preset voltage value; a status information determination module, configured to determine the status information of the voltage drop of the vehicle power supply system according to the magnitude relationship.

[0115] In some embodiments, the status information determination module includes: a fifth determination sub-module, configured to determine that the status information of the voltage drop of the vehicle power supply system is the normal status if the magnitude relationship indicates that the input voltage of the load is greater than or equal to the preset voltage value; or a sixth determination sub-module, configured to determine that the status information of the voltage drop of the vehicle power supply system is the abnormal status or the invalid status if the magnitude relationship indicates that the input voltage of the load is less than the preset voltage value.

[0116] In some embodiments, the sixth determination sub-module includes: a first determination unit, configured to determine the output voltage of the power supply and the rated output voltage of the power supply; a second determination unit, configured to determine that the status information of the voltage drop of the vehicle power supply system is the abnormal status if the ratio of the output voltage of the power supply to the rated output voltage of the power supply is greater than or equal to a ratio threshold; a third determination unit, configured to determine that the status information of the voltage drop of the vehicle power supply system is the invalid status if the ratio of the output voltage of the power supply to the rated output voltage of the power supply is less than the ratio threshold.

[0117] In some other embodiments, the fault location device 600 further includes: a voltage drop status signal uploading module, configured to generate a voltage drop status signal according to the status information and upload the voltage drop status signal.

[0118] According to one aspect of the embodiments of the present application, there is also provided an electronic device, as Figure 11 shown, the electronic device 700 includes a processor 710 and one or more memories 720. The one or more memories 720 are used to store program instructions executed by the processor 710, and when the processor 710 executes the program instructions, the above-mentioned fault location method is implemented.

[0119] Further, the processor 710 may include one or more processing cores. The processor 710 runs or executes instructions, programs, code sets, or instruction sets stored in the memory 720, and calls data stored in the memory 720. Optionally, the processor 710 may be implemented in at least one hardware form of digital signal processing (DSP), field-programmable gate array (FPGA), or programmable logic array (PLA). The processor 710 may integrate a combination of one or more of a central processing unit (CPU), a graphics processing unit (GPU), and a modem. Among them, the CPU mainly processes the operating system, user interface, application programs, etc.; the GPU is responsible for rendering and drawing the display content; the modem is used to process wireless communication. It can be understood that the above modem may not be integrated into the processor and may be implemented separately through a communication chip.

[0120] According to one aspect of the present application, the present application further provides a computer-readable storage medium, which may be included in the electronic device described in the above embodiments; or may exist separately without being assembled into the electronic device. The above computer-readable storage medium carries computer-readable instructions, and when the computer-readable storage instructions are executed by a processor, the method in any of the above embodiments is implemented.

[0121] It should be noted that the computer-readable medium shown in the embodiments of the present application can be a computer-readable signal medium, a computer-readable storage medium, or any combination of the above two. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of the computer-readable storage medium can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, the computer-readable storage medium can be any tangible medium that contains or stores a program, and this program can be used by or in combination with an instruction execution system, apparatus, or device. In the present application, the computer-readable signal medium can include a data signal propagated in a baseband or as part of a carrier wave, which carries the computer-readable program code. Such a propagated data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The computer-readable signal medium can also be any computer-readable medium other than the computer-readable storage medium, and this computer-readable medium can send, propagate, or transmit a program for use by or in combination with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted by any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0122] The units involved in the embodiments described in the present application can be implemented in software or in hardware, and the described units can also be provided in a processor. Among them, the names of these units do not, in some cases, constitute a limitation on the unit itself.

[0123] Those skilled in the art will readily think of other implementation schemes of the present application after considering the specification and practicing the embodiments disclosed herein. The present application is intended to cover any variations, uses, or adaptive changes of the present application, and these variations, uses, or adaptive changes follow the general principles of the present application and include common general knowledge or conventional technical means in the technical field not disclosed in the present application.

[0124] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A fault location method, characterized in that: The method comprises: Determine status information of a voltage drop of a vehicle power supply system, wherein the status information includes a normal state, an abnormal state or an invalid state, wherein the vehicle power supply system includes a power supply source, a power distribution device and a load; If the state information is the abnormal state, determining a first voltage drop between the output voltage of the power supply and the output voltage of the power distribution device, and determining a second voltage drop between the output voltage of the power distribution device and the input voltage of the load; A fault location is performed on the vehicle power supply system according to the first voltage drop and the second voltage drop.

2. The method according to claim 1, characterized in that The method of locating a fault of the vehicle power supply system according to the first voltage drop and the second voltage drop includes: Obtaining the output current of the power supply, the resistance of the power supply, and the length of the wire of the power supply; Determining a first standard voltage according to an output current of the power supply, a resistance of the power supply, and a wire length of the power supply; If the first voltage drop is less than or equal to the first standard voltage, it is determined that the power supply has not failed; or If the first voltage drop is greater than the first standard voltage, it is determined that the power supply fails.

3. The method according to claim 1, characterized in that: The method of locating a fault of the vehicle power supply system according to the first voltage drop and the second voltage drop includes: Obtaining the output current of the power distribution equipment, the resistance of the power distribution equipment and the length of the wire of the power distribution equipment; Determine a second standard voltage according to the output current of the power distribution device, the resistance of the power distribution device and the length of the wire of the power distribution device; If the second voltage drop is less than or equal to the second standard voltage, it is determined that the power distribution device has not failed; or If the second voltage drop is greater than the second standard voltage, it is determined that the power distribution equipment fails.

4. The method according to claim 1, characterized in that: Before determining the status information of the voltage drop of the vehicle power supply system, the method further includes: obtaining an input voltage of the load; Determine the magnitude relationship between the input voltage of the load and a preset voltage value; The state information of the voltage drop of the vehicle power supply system is determined according to the magnitude relationship.

5. The method according to claim 4, characterized in that The determining, according to the magnitude relationship, the state information of the voltage drop of the vehicle power supply system includes: If the magnitude relationship indicates that the input voltage of the load is greater than or equal to the preset voltage value, then determining that the state information of the voltage drop of the vehicle power supply system is the normal state; or If the magnitude relationship indicates that the input voltage of the load is less than the preset voltage value, the state information of the voltage drop of the vehicle power supply system is determined to be the abnormal state or the invalid state.

6. The method according to claim 5, characterized in that If the magnitude relationship indicates that the input voltage of the load is less than the preset voltage value, determining that the state information of the voltage drop of the vehicle power supply system is the abnormal state or the invalid state includes: Determining an output voltage of the power supply and a rated output voltage of the power supply; If the ratio of the output voltage of the power supply to the rated output voltage of the power supply is greater than or equal to a ratio threshold, determining that the state information of the voltage drop of the vehicle power supply system is the abnormal state; If the ratio of the output voltage of the power supply to the rated output voltage of the power supply is less than the ratio threshold, it is determined that the state information of the voltage drop of the vehicle power supply system is the invalid state.

7. The method according to any one of claims 1 to 6, characterized in that: After determining the status information of the voltage drop of the vehicle power supply system, the method further includes: A voltage drop status signal is generated according to the status information, and the voltage drop status signal is uploaded.

8. A fault location device, characterized in that: The device comprises: A state information determination module, used to determine state information of a voltage drop of a vehicle power supply system, wherein the state information includes a normal state, an abnormal state or an invalid state, wherein the vehicle power supply system includes a power supply source, a power distribution device and a load; a voltage drop determination module, configured to determine, if the state information is the abnormal state, a first voltage drop between the output voltage of the power supply and the output voltage of the power distribution device, and to determine a second voltage drop between the output voltage of the power distribution device and the input voltage of the load; A fault locating module is used to locate a fault of the vehicle power supply system according to the first voltage drop and the second voltage drop.

9. An electronic device, characterized in that: The electronic device comprises: processor; A memory having computer-readable instructions stored thereon, wherein when the computer-readable instructions are executed by the processor, the method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores program codes, which can be called by a processor to execute the method according to any one of claims 1 to 7.

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