The invention provides an electric vehicle charging and discharging circuit, an electric vehicle and a control method. The circuit comprises a battery pack, a fuse, a current sensor, a main negative relay, a main positive relay, a fast charging negative relay, a fast charging positive relay, a first semiconductor and a second semiconductor. When the main negative relay, the main positive relay, the fast charging negative relay and the fast charging positive relay are all in a closed state, the main negative relay and the fast charging negative relay are connected in parallel through a first semiconductor, and the main positive relay and the fast charging positive relay are connected in parallel through a second semiconductor; when the main negative relay, the main positive relay, the fast charging negative relay and the fast charging positive relay are all in a disconnected state, current output by the direct current charging pile flows to the distribution box from the charging pile positive electrode through the second semiconductor and then is connected to the charging pile negative electrode through the first semiconductor. The quick charging performance can be improved, the cost is reduced, and the preheating reliability is enhanced.

    本发明提供一种电动汽车充放电电路、电动汽车及控制方法,其中电路包括:电池组、熔断器、电流传感器、主负继电器、主正继电器、快充负继电器、快充正继电器、第一半导体、第二半导体;主负继电器、主正继电器、快充负继电器和快充正继电器均处于闭合状态时,主负继电器和快充负继电器通过第一半导体并联,主正继电器和快充正继电器通过第二半导体并联;主负继电器、主正继电器、快充负继电器和快充正继电器均处于断开状态时,直流充电桩输出的电流从充电桩正极经过第二半导体流向配电盒,再经过第一半导体连接至充电桩负极。本发明可以提高快充性能、降低成本、增强预加热可靠性。


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    Title :

    Electric vehicle charging and discharging circuit, electric vehicle and control method


    Additional title:

    电动汽车充放电电路、电动汽车及控制方法


    Contributors:
    LIU QIANG (author) / LIN JINYUAN (author) / LI XUE (author) / HU SONGHUA (author)

    Publication date :

    2024-11-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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