CN114047454A - Vehicle power system fault diagnosis method, system, device and medium - Google Patents
Vehicle power system fault diagnosis method, system, device and medium Download PDFInfo
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Abstract
The application relates to a vehicle power system fault diagnosis method, which comprises the following steps: acquiring gear information of the vehicle power supply system; and acquiring the state information of the corresponding power distribution module according to the gear information, and generating the fault information of the vehicle power supply system according to the state information of the power distribution module. According to the vehicle power system fault diagnosis method, parameter state information of the vehicle power system is obtained through sampling, whether a fault exists in a power supply is judged through comparison with preset normal parameters of the system, the fault of a power supply end of the vehicle can be eliminated firstly, loop parameters of a power distribution module are collected under the normal condition of the power supply end, the fault position and the fault type can be accurately positioned through a built-in judgment program of the system, the possible situation of the fault is comprehensively covered in the whole detection process, and the fault is eliminated step by step, so that the fault detection process can be ensured to be fast and efficient.
Description
Technical Field
The present application relates to the field of vehicle power failure detection technologies, and in particular, to a method, a system, a device, and a medium for diagnosing a vehicle power system failure.
Background
Along with the development of commercial vehicles, the functions are gradually increased, the loops of a whole vehicle power supply system are increased, the system is more and more complex, the troubleshooting difficulty is gradually increased, the electric fault of the whole vehicle is complicated and concealed, particularly, the power supply system of the vehicle is used as the power supply of the vehicle, the operation of the electronic devices of the whole vehicle is very important, once the power supply system has a problem, the whole vehicle can be paralyzed, the driving safety is seriously threatened, in addition, the timeliness requirement of a transport vehicle on the transport is higher and higher, and therefore higher and higher requirements are provided for fault detection.
At present, the fault detection and diagnosis of the conventional power supply system also depends on manual judgment and test, which greatly affects maintenance efficiency and brings great inconvenience to troubleshooting, so that a monitoring method for the power supply system is needed, faults are accurately fed back in real time, a driver or maintenance personnel can find the problems in time, the faults are eliminated, and the safety of vehicles is ensured.
Disclosure of Invention
In view of the above, it is necessary to provide a method, a system, a device and a medium for diagnosing a fault of a vehicle power system, and to detect a fault of the power system in time to improve the efficiency of detecting the fault.
The first aspect of the present application provides a vehicle power supply system fault diagnosis method, including:
acquiring gear information of the vehicle power supply system;
and acquiring the state information of the corresponding power distribution module according to the gear information, and generating the fault information of the vehicle power supply system according to the state information of the power distribution module.
In the vehicle power system fault diagnosis method according to the embodiment, parameter state information of the vehicle power system is acquired through sampling, whether a fault exists in a power supply is judged through comparison with preset normal parameters of the system, the fault of a power supply end of the vehicle can be eliminated firstly, loop parameters of a power distribution module are collected under the normal condition of the power supply end, a fault position and a fault type can be accurately positioned through a built-in judgment program of the system, the possible situation of the fault is comprehensively covered in the whole detection process, and the fault is eliminated step by step, so that the fault detection process can be ensured to be fast and efficient.
In one embodiment, the gear comprises at least one of a normal power gear, an ACC gear, an ON gear and an ST gear, the vehicle power system fault information comprises power fault state information, and before the step of obtaining the gear information of the vehicle power system, the method further comprises:
acquiring power supply voltage parameter information of a vehicle, wherein the power supply voltage parameter information comprises at least one of a main power supply voltage value, an ACC gear power supply voltage value, an ON gear power supply voltage value and an ST gear power supply voltage value;
judging whether a vehicle power supply system is in one of the gears or not according to the power supply voltage parameter information and a preset power supply voltage parameter threshold value, and if so, generating corresponding gear information;
otherwise, generating the power failure state information, and controlling the vehicle power supply to reset after recording the corresponding failure information.
In one embodiment, the preset power supply voltage parameter threshold includes a preset main power supply voltage threshold and a preset gear power supply voltage threshold, the preset main power supply voltage threshold is 9V-11V, and the preset gear power supply voltage threshold is 5.5V-6.5V.
In one embodiment, the status information of the power distribution module includes front-end voltage information of a relay, rear-end voltage information of the relay, and control status information of the relay, the vehicle power system fault information includes fault status information of a relay loop, the step of obtaining the status information of the power distribution module according to the power normal status information, and generating the vehicle power system fault information according to the status information of the power distribution module includes:
acquiring front end voltage information of the relay, rear end voltage information of the relay and control state information of the relay;
generating fault type information of the relay loop according to the front end voltage information of the relay, the rear end voltage information of the relay and the control state information of the relay;
and generating fault state information of the relay circuit according to preset rules and fault category information of the relay circuit.
In one embodiment, the state information of the power distribution module further includes front-end voltage information of fuses and back-end voltage information of fuses, the fuses include a first fuse and a second fuse, the vehicle power system fault information further includes fault state information of a fuse loop, the step of obtaining the state information of the power distribution module according to the normal state information of the power supply and generating the fault information of the vehicle power system according to the state information of the power distribution module further includes:
acquiring front-end voltage information of the first fuse and rear-end voltage information of the first fuse;
generating fault type information of a first fuse circuit according to the front-end voltage information of the first fuse and the rear-end voltage information of the first fuse;
acquiring front-end voltage information of the second fuse, rear-end voltage information of the second fuse and control state information of a relay arranged corresponding to the second fuse;
generating fault type information of a second fuse circuit according to the front-end voltage information of the second fuse, the rear-end voltage information of the second fuse and control state information of a relay arranged corresponding to the second fuse;
and generating fault state information of the fuse circuit according to the preset rule according to the fault type information of the first fuse circuit and the fault type information of the second fuse circuit.
In one embodiment, the preset rule includes:
and sorting the fault state information from first to last according to the functional importance degree and the fault time sequence of the fault unit, wherein the functional importance degree is prior to the fault time sequence.
The second aspect of the application provides a vehicle power system fault diagnosis system, which comprises an information acquisition module, a logic judgment module, a driving module and a communication module, wherein the information acquisition module is used for acquiring the power supply voltage parameter information and the state information of the power distribution module; the logic judgment module is connected with the information acquisition module and used for generating the fault information of the vehicle power supply system according to the information acquired by the information acquisition module; the driving module is connected with the logic judgment module and is used for controlling the relay to be switched on or switched off according to the relay control signal; the communication module is connected with the logic judgment module and is used for realizing communication between the logic judgment module and the whole vehicle communication system.
In the vehicle electrical power generating system fault diagnosis system that above-mentioned embodiment provided, through setting up the information acquisition module, can acquire vehicle electrical power generating system's electrical parameter information in real time, judge the module and provide timely effectual input for the logic, fault diagnosis's timeliness on next step has been ensured, compare in the artifical mode of looking for and checking the circuit, efficiency improves greatly, in addition, communication module and whole car communication system through setting up realize information interconnection, carry out real-time display with electrical power generating system operating parameter, made things convenient for the staff to know whole car power supply running state in real time more, can audio-visual reading through system display interface to electrical power generating system fault condition, fault finding's efficiency has been improved greatly.
In one embodiment, the information acquisition module comprises:
the main power supply state acquisition unit is connected with the logic judgment module and is used for acquiring a main power supply voltage value;
the switch acquisition unit is connected with the logic judgment module and is used for acquiring the ACC gear power supply voltage value, the ON gear power supply voltage value and the ST gear power supply voltage value;
the relay state acquisition unit is connected with the logic judgment module and is used for acquiring the front end voltage information of the relay, the rear end voltage information of the relay and the control state information of the relay;
and the fuse state acquisition unit is connected with the logic judgment module and is used for acquiring the front-end voltage information of the first fuse, the rear-end voltage information of the first fuse, the front-end voltage information of the second fuse and the rear-end voltage information of the second fuse.
A third aspect of the application provides a computer device comprising a memory storing a computer program and a processor implementing the steps of the method as described in any of the embodiments of the application when the processor executes the computer program.
A fourth aspect of the present application provides a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of any of the methods described in the embodiments of the present application.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating a method for diagnosing a fault in a vehicle power system according to an embodiment of the present application;
FIG. 2 is a schematic flow chart illustrating a method for diagnosing faults of a vehicle power system according to another embodiment of the present application;
FIG. 3 is a schematic flow chart illustrating a method for diagnosing a fault in a vehicle power system according to a third embodiment of the present application;
FIG. 4 is a schematic flow chart of a vehicle power system fault diagnosis method according to a fourth embodiment of the present application;
FIG. 5 is a schematic diagram of a vehicle power system fault diagnosis system according to an embodiment of the present application;
wherein, 1, a first fuse; 2. a relay; 3. a second fuse.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
Along with the continuous development of the automobile industry, the electrification and intelligentization degree of an automobile is continuously improved, the functions are gradually increased, a vehicle power supply system is also more and more complex, the state of the vehicle power supply system is related to whether the automobile can normally run or not as the brain of the normal running of the automobile, once the power supply system goes wrong, the whole automobile is paralyzed, and the driving safety is seriously threatened.
At present, the fault detection and diagnosis of the vehicle power supply system also depends on manual judgment and test, which greatly affects maintenance efficiency and brings great inconvenience to troubleshooting.
In order to solve the above problems, it is necessary to provide a more intelligent and more convenient vehicle power system fault diagnosis method, which improves the efficiency of vehicle power system fault diagnosis, and will be described below with specific embodiments.
In one embodiment of the present application, as shown in fig. 1, there is provided a vehicle power supply system fault diagnosis method including:
wherein the gear comprises at least one of a normal power gear, an ACC gear, an ON gear and an ST gear.
Specifically, before detecting a power system fault, it is necessary to confirm that the power supply of the entire vehicle is in a normal state, and to eliminate a power loss phenomenon caused by the power supply fault. According to the common arrangement of the vehicle power system, the power supply gears generally include a normal power gear, an ACC auxiliary gear, an ON ignition gear, an ST starting gear and the like, and it is necessary to confirm that the power supply of the vehicle is normal under the above-mentioned gear conditions.
And 24, acquiring the state information of the corresponding power distribution module according to the gear information, and generating the fault information of the vehicle power supply system according to the state information of the power distribution module.
Specifically, under the condition that the normal power supply of the automobile in each gear state is detected, the fault type is judged by collecting the circuit parameter information of each power distribution branch of the power supply loop system and accurately positioning the fault position through a built-in program of the system, and the fault information of the real-time power supply system is output and displayed through the communication system, so that a worker can find and process the fault information of the power supply system at the first time, and the fault response capability is improved.
In the vehicle power system fault diagnosis method according to the embodiment, parameter state information of the vehicle power system is acquired through sampling, whether a fault exists in a power supply is judged through comparison with preset normal parameters of the system, the fault of a power supply end of the vehicle can be eliminated firstly, loop parameters of a power distribution module are collected under the normal condition of the power supply end, a fault position and a fault type can be accurately positioned through a built-in judgment program of the system, the possible situation of the fault is comprehensively covered in the whole detection process, and the fault is eliminated step by step, so that the fault detection process can be ensured to be fast and efficient.
In one embodiment of the present application, as shown in fig. 2, before the step of obtaining the gear information of the vehicle power system in step 22, the method further includes:
the power supply voltage parameter information comprises at least one of a main power supply voltage value, an ACC gear voltage value, an ON gear voltage value and an ST gear voltage value.
in some embodiments, the preset power supply voltage parameter threshold includes a preset main power supply voltage threshold and a preset gear power supply voltage threshold, where the preset main power supply voltage threshold is 9V to 11V, and the preset gear power supply voltage threshold is 5.5V to 6.5V.
Specifically, before detecting a power system fault, the main power supply voltage and the power supply voltage of each gear are detected, and the power supply fault is preferably eliminated. In this embodiment, considering that the power supply system has an energy storage component inside a partial power utilization component to discharge slowly after power failure, which results in power supply voltage identification error, the power supply state judgment threshold is increased, and the preset main power supply voltage threshold is selected to be 10V, and the preset gear power supply voltage threshold is 6V, as shown in table 1:
TABLE 1 Power State Classification Table
1) Main power supply voltage UmainACC-level power supply voltage U greater than or equal to 10VACCLess than 6V, ON gear power supply voltage UONSupply voltage U of < 6V, ST gearSTIf the voltage is less than 6V, the system power supply is in a normal power level;
2) main power supply voltage UmainACC-level power supply voltage U greater than or equal to 10VACCPower supply voltage U of more than or equal to 6V and ON gearONSupply voltage U of < 6V, ST gearSTIf the voltage is less than 6V, the system power supply is in an ACC gear;
3) main power supply voltage UmainACC-level power supply voltage U greater than or equal to 10VACCPower supply voltage U of more than or equal to 6V and ON gearONSupply voltage U of more than or equal to 6V and ST gearSTIf the voltage is less than 6V, the system power supply is in an ON gear;
4) main power supply voltage UmainACC-level power supply voltage U greater than or equal to 10VACCLess than 6V, ON gear power supply voltage UONSupply voltage U of more than or equal to 6V and ST gearSTThe voltage is more than or equal to 6V, and a system power supply is in an ST level;
5) otherwise, the system power fails.
When the system power state is determined as in the above embodiments 1) to 4), it is determined that the vehicle power is normal, and corresponding shift position information is output to the system.
And 20, otherwise, generating the power failure state information, and controlling the vehicle power supply to reset after recording the corresponding failure information.
Specifically, when the system power supply state is determined as the case of 5) in the foregoing embodiment, it is determined that the vehicle power supply has failed, power supply failure state information is output, and the power supply system is reset to wait for a serviceman to check the vehicle power supply failure.
In one embodiment of the present application, as shown in fig. 3, the state information of the power distribution module includes front-end voltage information of a relay, rear-end voltage information of the relay, and control state information of the relay, and the vehicle power system fault information includes fault state information of a relay loop, step 24, obtaining the state information of the power distribution module according to the power normal state information, and generating the vehicle power system fault information according to the state information of the power distribution module, including:
the control state of the relay comprises a pull-in state and a disconnection state.
specifically, as shown in table 2, the relay and loop fault classification table is shown, wherein when the relay is in the pull-in state, if the voltage of the front end of the relay is detected to be high level and the voltage of the rear end of the relay is detected to be high level, the relay is judged to be normal; if the voltage of the front end of the relay is high level and the voltage of the rear end of the relay is low level, judging that the relay has open circuit fault; if the voltage of the front end of the relay is low level, whether a fault occurs or the condition does not exist cannot be judged; when the relay is in a disconnected state, if the voltage of the front end of the relay is high level and the voltage of the rear end of the relay is high level, the relay is judged to have short-circuit fault or the rear end circuit and the power supply have short-circuit fault; if the voltage of the front end of the relay is high level and the voltage of the rear end of the relay is low level, judging that the relay is normal; if the voltage of the front end of the relay is low level, whether a fault occurs or the condition does not exist cannot be judged.
TABLE 2 Relay and Loop Fault Classification
And 246, generating fault state information of the relay circuit according to preset rules according to the fault category information of the relay circuit.
In some embodiments, the preset rule includes sorting the fault state information from first to last according to the functional importance degree and the fault time sequence of the fault unit, wherein the functional importance degree is prior to the fault time sequence.
Specifically, after the relay and the loop thereof are subjected to fault detection, the system performs sequencing display according to the functional importance degree of the fault unit, for example, the relay fault related to the vehicle power system has a higher priority than the relay fault related to the auxiliary driving system, when the relay fault related to the vehicle power system and the auxiliary driving system are subjected to fault at the same time, the relay fault of the power system is preferentially displayed, and when two relays with the same priority are subjected to fault in the same round of detection, the relay fault is displayed according to the fault time sequence.
In an embodiment of the present application, as shown in fig. 4, the state information of the power distribution module further includes front-end voltage information of fuses and rear-end voltage information of fuses, where the fuses include a first fuse and a second fuse, step 24, the vehicle power system fault information further includes fault state information of a fuse loop, the step of obtaining the state information of the power distribution module according to the power normal state information, and generating the vehicle power system fault information according to the state information of the power distribution module further includes:
step 248, acquiring front-end voltage information of the first fuse and back-end voltage information of the first fuse;
2410, generating fault type information of a first fuse circuit according to the front-end voltage information of the first fuse and the rear-end voltage information of the first fuse;
specifically, as shown in table 3, a first fuse and a loop fault classification table are shown, where if a front-end voltage of the first fuse is a high level and a rear-end voltage of the first fuse is a high level, it is determined that the first fuse is normal; if the front end voltage of the first fuse is high level and the rear end voltage of the first fuse is low level, judging that the first fuse has an open circuit fault; if the front end voltage of the first fuse is low level and the rear end voltage of the first fuse is high level, judging that the first fuse has a broken circuit fault and a circuit at the rear end of the first fuse and a power supply have a short circuit fault; and if the front end voltage of the first fuse is low level and the rear end voltage of the first fuse is low level, judging that the first fuse is normal but the front end circuit has an open circuit fault.
TABLE 3 first fuse and Loop Fault Classification
Step 2412, acquiring front-end voltage information of the second fuse, rear-end voltage information of the second fuse and control state information of a relay arranged corresponding to the second fuse;
step 2414, generating fault type information of a second fuse circuit according to the front-end voltage information of the second fuse, the rear-end voltage information of the second fuse and the control state information of a relay arranged corresponding to the second fuse;
specifically, as shown in table 4, the second fuse and the loop fault classification table are shown, where when the relay is in the pull-in state, if the voltage of the front end of the second fuse is at a high level and the voltage of the rear end of the second fuse is at a high level, it is determined that the second fuse is normal; if the front end voltage of the second fuse is high level and the rear end voltage of the second fuse is low level, judging that the second fuse has an open circuit fault; if the front end voltage of the second fuse is low level and the rear end voltage of the second fuse is high level, judging that the second fuse has a broken circuit fault and a circuit at the rear end of the second fuse and a power supply have a short circuit fault; if the front end voltage of the second fuse is low level and the rear end voltage of the second fuse is low level, judging that the second fuse is normal but the front end circuit has an open circuit fault; when the relay is in a disconnected state, if the front end voltage of the second fuse is high level and the rear end voltage of the second fuse is high level, judging the second fuse, and judging that the second fuse is normal but a rear end circuit and a power supply have a short-circuit fault; if the front end voltage of the second fuse is low level and the rear end voltage of the second fuse is high level, judging that the second fuse has open circuit fault and the rear end circuit and the power supply have short circuit fault; and if the front end voltage of the second fuse is low level and the rear end voltage of the second fuse is low level, judging that the second fuse is normal.
TABLE 4 second fuse and Loop Fault Classification
And 2416, generating fault state information of the fuse circuit according to the preset rule according to the fault type information of the first fuse circuit and the fault type information of the second fuse circuit.
Specifically, similar to the method of step 246, after the fuse and its circuit fault detection are completed, the system will display the fuse in order according to the functional importance of the fault unit and the sequence of the fault time.
In an embodiment of the present application, as shown in fig. 5, the present application further provides a vehicle power system fault diagnosis system, which includes an information acquisition module 100, a logic determination module 200, a driving module 300, and a communication module 400, where the information acquisition module 100 is configured to acquire power supply voltage parameter information and state information of a corresponding power distribution module; the logic judgment module 200 is connected with the information acquisition module 100 and is used for generating vehicle power system fault information according to the information acquired by the information acquisition module 100; the driving module 300 is connected with the logic judgment module 200 and is used for controlling the relay to be switched on or off according to the relay control signal; the communication module 400 is connected to the logic determination module 200, and is configured to implement communication between the logic determination module 200 and the vehicle communication system.
In the vehicle electrical power generating system fault diagnosis system that above-mentioned embodiment provided, through setting up information acquisition module 100, can acquire vehicle electrical power generating system's electrical parameter information in real time, provide timely effectual input for logic judgement module 200, on next step fault diagnosis's timeliness has been ensured, compare in the artifical mode of looking for and checking the circuit, efficiency improves greatly, in addition, communication module 400 and whole car communication system through the setting realize information interconnection, carry out real-time display with electrical power generating system operating parameter, made things convenient for the staff to know whole car power supply running state in real time more, can audio-visual reading through system display interface to electrical power generating system fault condition, the efficiency of fault discovery has been improved greatly.
In one embodiment, the information collecting module 100 further comprises:
the main power supply state acquisition unit 110 is connected with the logic judgment module 200 and is used for acquiring a main power supply voltage value;
the switch acquisition unit 120 is connected with the logic judgment module 200 and is used for acquiring an ACC gear power supply voltage value, an ON gear power supply voltage value and an ST gear power supply voltage value;
the relay state acquisition unit 130 is connected with the logic judgment module 200 and is used for acquiring the front end voltage information of the relay, the rear end voltage information of the relay and the control state information of the relay;
the fuse state collecting unit 140 is connected to the logic determining module 200, and is configured to collect front-end voltage information of the first fuse, back-end voltage information of the first fuse, front-end voltage information of the second fuse, and back-end voltage information of the second fuse.
In an embodiment of the present application, there is also provided a computer device, including a memory and a processor, the memory storing a computer program, and the processor implementing the steps of any of the foregoing methods in the embodiments of the present application when executing the computer program.
In an embodiment of the present application, there is also provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method in any of the preceding embodiments of the present application.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A vehicle power system fault diagnosis method, characterized by comprising:
acquiring gear information of the vehicle power supply system;
and acquiring the state information of the corresponding power distribution module according to the gear information, and generating the fault information of the vehicle power supply system according to the state information of the power distribution module.
2. The method of claim 1, wherein the gear comprises at least one of a normal power gear, an ACC gear, an ON gear, and an ST gear, the vehicle electrical power system fault information comprises electrical power fault status information, and the step of obtaining gear information for the vehicle further comprises, prior to the step of:
acquiring power supply voltage parameter information of a vehicle, wherein the power supply voltage parameter information comprises at least one of a main power supply voltage value, an ACC gear power supply voltage value, an ON gear power supply voltage value and an ST gear power supply voltage value;
judging whether a vehicle power supply system is in one of the gears or not according to the power supply voltage parameter information and a preset power supply voltage parameter threshold value, and if so, generating corresponding gear information;
otherwise, generating the power failure state information, and controlling the vehicle power supply to reset after recording the corresponding failure information.
3. The method according to claim 2, wherein the preset power supply voltage parameter threshold comprises a preset main power supply voltage threshold and a preset gear power supply voltage threshold, the preset main power supply voltage threshold is 9V-11V, and the preset gear power supply voltage threshold is 5.5V-6.5V.
4. The method as claimed in any one of claims 1 to 3, wherein the status information of the power distribution module includes front-end voltage information of a relay, rear-end voltage information of the relay, and control status information of the relay, the vehicle power system fault information includes fault status information of a relay loop, the step of obtaining the status information of the power distribution module according to the power source normal status information, and generating the vehicle power system fault information according to the status information of the power distribution module includes:
acquiring front end voltage information of the relay, rear end voltage information of the relay and control state information of the relay;
generating fault type information of the relay loop according to the front end voltage information of the relay, the rear end voltage information of the relay and the control state information of the relay;
and generating fault state information of the relay circuit according to preset rules and fault category information of the relay circuit.
5. The method of claim 4, wherein the state information of the power distribution module further includes front-end voltage information of fuses and rear-end voltage information of fuses, the fuses include a first fuse and a second fuse, the vehicle power system fault information further includes fault state information of a fuse loop, the steps of obtaining the state information of the power distribution module from the power normal state information, and generating the vehicle power system fault information from the state information of the power distribution module further include:
acquiring front-end voltage information of the first fuse and rear-end voltage information of the first fuse;
generating fault type information of a first fuse circuit according to the front-end voltage information of the first fuse and the rear-end voltage information of the first fuse;
acquiring front-end voltage information of the second fuse, rear-end voltage information of the second fuse and control state information of a relay arranged corresponding to the second fuse;
generating fault type information of a second fuse circuit according to the front-end voltage information of the second fuse, the rear-end voltage information of the second fuse and control state information of a relay arranged corresponding to the second fuse;
and generating fault state information of the fuse circuit according to the preset rule according to the fault type information of the first fuse circuit and the fault type information of the second fuse circuit.
6. The method of claim 5, wherein the preset rules comprise:
and sorting the fault state information from first to last according to the functional importance degree and the fault time sequence of the fault unit, wherein the functional importance degree is prior to the fault time sequence.
7. A vehicle power system fault diagnostic system, comprising:
the information acquisition module is used for acquiring the power supply voltage parameter information and the state information of the power distribution module;
the logic judgment module is connected with the information acquisition module and used for generating the fault information of the vehicle power supply system according to the information acquired by the information acquisition module;
the driving module is connected with the logic judgment module and used for controlling the relay to be switched on or switched off according to the relay control signal;
and the communication module is connected with the logic judgment module and is used for realizing the communication between the logic judgment module and the whole vehicle communication system.
8. The system of claim 7, wherein the information collection module comprises:
the main power supply state acquisition unit is connected with the logic judgment module and is used for acquiring a main power supply voltage value;
the switch acquisition unit is connected with the logic judgment module and is used for acquiring the ACC gear power supply voltage value, the ON gear power supply voltage value and the ST gear power supply voltage value;
the relay state acquisition unit is connected with the logic judgment module and is used for acquiring the front end voltage information of the relay, the rear end voltage information of the relay and the control state information of the relay;
and the fuse state acquisition unit is connected with the logic judgment module and is used for acquiring the front-end voltage information of the first fuse, the rear-end voltage information of the first fuse, the front-end voltage information of the second fuse and the rear-end voltage information of the second fuse.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method according to any of claims 1-6 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
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