Charging fault diagnosis and safety detection system and method of electric vehicle

A fault diagnosis and safety detection technology, applied in electric vehicle charging technology, electric vehicles, charging stations, etc., can solve problems such as the lack of simple detectors, electric vehicle charging problems, etc., to achieve simple structure, improve safety, and reduce work. amount of effect
CN109450006AInactive Publication Date: 2019-03-08NANJING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV OF SCI & TECH
Publication Date
2019-03-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a charging fault diagnosis and safety detection system and method of an electric vehicle. The system comprises a BMS, a CAN wire, a VCU, a vehicle charger, a DC charging pile,an AC charging pile, a battery, a vehicle charging interface, a charging interface, a charging gun and a charging fault diagnosis and safety detection system, and the charging fault diagnosis and safety detection system comprises a signal acquisition unit, a national standard memory, a processing unit, a human-machine interaction interface and a relay. The method includes steps: the charging faultdiagnosis and safety detection system is externally connected between the vehicle charging interface and the charging interface of the charging gun, the connection to an electric vehicle charging system is realized through the CAN wire, and through collection of message information, acquired by the VCU, of the BMS and communication messages of the DC charging pile and the AC charging pile and comparison with an electric vehicle charging national standard, the reason of charging failure is determined, and charging is finished after occurrence of problems of overcurrent and overvoltage of charging. According to the system and the method, the charging detection efficiency and the charging security of electric vehicles can be greatly improved.
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Description

technical field

[0001] The invention relates to the technical field of electric vehicles, in particular to an electric vehicle charging fault diagnosis and safety detection system and method. Background technique

[0002] Electric Vehicles (EV) mainly include: Pure Electric Vehicles (PEV), Hybrid Electric Vehicles (HEV) and Fuel Cell Vehicles (FCV). Compared with traditional internal combustion engine vehicles (Internal Combustion Engine Vehicles, ICEV), whether it is the HEV whose power energy adopts an intermediate transition form, or the PEV or FCV that completely replaces the traditional fuel energy form, it shows that the energy source and structure of the electric vehicle's power system occur. changed. This change enables electric vehicles to reduce or replace the dependence on traditional petroleum resources. Pure electric vehicles, as a zero-emission vehicle (Zero-emission Vehicles, ZEV), can effectively suppress environmental pollution problems. At present, passen...

Claims

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