The invention discloses a battery system of an electric car and a state diagnosis method for high-voltage relays in the battery system. The battery system comprises a battery pack, the multiple high-voltage relays and a battery manager, wherein each high-voltage relay comprises a control end and an executing end. The state diagnosis method comprises the following steps: the battery manager sends a control demand to the control end of each high-voltage relay, so as to control each high-voltage relay; the battery manager acquires a voltage of the executing end of each high-voltage relay, and identifies the state of each high-voltage relay according to the control command sent to each high-voltage relay and the voltage of the executing end of the corresponding high-voltage relay. The state diagnosis method disclosed by the embodiments of the invention is good in real-time performance, high in accuracy and good in reliability, and without additionally adding a relay is not needed.


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    Title :

    Battery system of electric car and state diagnosis method for high-voltage relays in battery system


    Contributors:
    MA JIANXIN (author)

    Publication date :

    2015-12-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES



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