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Method and system for storing timestamps in fault diagnosis of electric vehicle

A fault diagnosis, electric vehicle technology, applied in general control systems, control/regulation systems, testing/monitoring control systems, etc., can solve problems such as misjudgment, inability to effectively know the fault record connection, etc. Reliable effect with few hardware improvements

Pending Publication Date: 2021-06-29
CHERY COMML VEHICLE ANHUI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These records can help technicians analyze and troubleshoot problems very well. However, there are several situations where when reading multiple fault records, technicians cannot effectively know the connection between these fault records, because these fault records It may be caused by a certain fault, or it may be caused by multiple faults at different time periods
Another situation is that when a fault reported by the car owner is actually not related to the VCU, but the fault record in the VCU will make the technician mistakenly think that the fault is related to the VCU, thus making a wrong judgment

Method used

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  • Method and system for storing timestamps in fault diagnosis of electric vehicle
  • Method and system for storing timestamps in fault diagnosis of electric vehicle
  • Method and system for storing timestamps in fault diagnosis of electric vehicle

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Embodiment Construction

[0017] The specific implementation manner of the present invention will be described in further detail below by describing the best embodiment with reference to the accompanying drawings.

[0018] The method of storing time stamps in electric vehicle fault diagnosis is to add a clock chip to the VCU of the vehicle controller, and the main control chip in the VCU of the vehicle controller is connected to the clock chip to interact with the information of the clock chip to obtain the information in the clock chip. The current time point and store the time stamp information obtained by the clock chip at the time of failure. The main control chip records the fault information into EEPROM and or FLASH through the UDS protocol, and at the same time stores the current fault occurrence time point obtained from the clock chip into the non-volatile memory.

[0019] A farad capacitor is set in the vehicle controller. When the VCU is working, the farad capacitor is charged to the same vol...

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Abstract

The invention discloses a method for storing timestamps in fault diagnosis of an electric vehicle. A clock chip is additionally arranged in a VCU , and a main control chip in the VCU is connected with the clock chip, so as to interact information with the clock chip to obtain a current time point in the clock chip and store timestamp information obtained by the clock chip when a fault occurs. The method and system have the advantages that timestamps corresponding to faults can be recorded, maintenance personnel can diagnose and use the method conveniently, and more bases can be provided for technicians to analyze fault causes; hardware is improved less, and implementation is convenient and reliable.

Description

technical field [0001] The invention relates to an electric vehicle diagnosis system, which adds time stamps to the faults recorded in the diagnosis system to assist technicians to better analyze and troubleshoot the causes of the faults. In particular, it relates to a method and system for storing time stamps in electric vehicle fault diagnosis. Background technique [0002] At present, most VCUs in electric vehicles use the 19 service in the UDS protocol as a diagnostic method. Through this protocol, the VCU can record the types of faults defined in advance by the developer, and can distinguish the faults that occurred and which ones are historical faults according to the corresponding signs. , which are the faults that are occurring. These records can help technicians analyze and troubleshoot problems very well. However, there are several situations where when reading multiple fault records, technicians cannot effectively know the connection between these fault records, ...

Claims

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Application Information

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IPC IPC(8): G05B23/02
CPCG05B23/0213
Inventor 邓一平刘昭才高新龙项南军李津津
Owner CHERY COMML VEHICLE ANHUI
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