Diagnostic method and system for whole vehicle faults of electric vehicle

Abstract

The invention discloses a diagnostic method and system for whole vehicle faults of an electric vehicle. The diagnostic method comprises the steps of collecting the operation information of all electrical devices of the electric vehicle, detecting whether the collected operation information is abnormal or not, giving out data abnormal alarms if the operation information of one or more electrical devices is detected to be abnormal, displaying the abnormal operation information and the names of one or more electrical devices corresponding to the abnormal operation information, inquiring a local fault diagnosis database according to the abnormal operation information, reading the fault reason analysis information corresponding to the abnormal operation information from the fault diagnosis database, and outputting the fault reason analysis information. The diagnostic method and system for the whole vehicle faults of the electric vehicle can conduct fault diagnosis on all the electrical devices independently, also conduct diagnosis on complex fault problems occurring in the matched using process of all the electrical devices, analyze the fault reasons, and greatly save human cost.

Description

technical field [0001] The invention relates to the field of diagnosis and control of electric vehicles, in particular to a diagnosis method and a diagnosis system for vehicle faults of electric vehicles. Background technique [0002] The traditional diagnosis method is to separately detect the operating parameters of each device, such as: a separate engine ECU diagnosis system for engine fault diagnosis, where the engine ECU (Electronic Control Unit, electronic control unit), also known as a microcomputer controller or Automotive-specific single-chip microcomputer; a separate diagnostic software for automotive instrumentation, used for fault diagnosis of automotive instrumentation. [0003] Traditional fuel buses have less electrical equipment, and each equipment is independent of each other without interfering with each other; for example, when the vehicle CAN (Controller Area Network, Controller Area Network) instrument fails, it has nothing to do with the engine; but for...

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Problems solved by technology

[0003] Traditional fuel buses have less electrical equipment, and each equipment is independent of each other without interfering with each other; for example, when the vehicle CAN (Controller Area Network, Controller Area Network) instrument fails, it has nothing to do with the engine; but for electric Vehicles, due to the increase in electrical equipment, have become a whole system, and the equipment must be connected with each other. If one equipment fails, other equipment may not work normally, or when there is a problem with the compatibility between equipment It will cause the whole vehicle to fail to operate normally. If the maintenance personnel do not analyze and judge each equipment as a whole, it will be difficult to find the cause of the failure.

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