The invention relates to the technical field of pure electric vehicles, and especially relates to a vehicle-mounted charging circuit and system, a control method of the circuit, and a pure electric vehicle. The circuit comprises a main negative relay, a pre-charging module and a charger module. The charger module comprises a vehicle-mounted charger and a slow charging relay; the vehicle-mounted charger receives a pre-charging request instruction when the pre-charging module is disconnected; the vehicle-mounted charger boosts the output voltage according to the pre-charging request instructionto obtain the current output voltage; the slow charging relay is conducted when a voltage difference value between a preset charging request voltage and the current output voltage is smaller than or equal to a preset difference value; and the vehicle-mounted charger charges the power battery when the slow charging relay and the main negative relay are both conducted. According to the circuit, whenthe pure electric vehicle is slowly charged, only the main negative charging relay and the slow charging relay need to be closed, pre-charging through a pre-charging loop of the whole vehicle is notneeded, and the vehicle-mounted charging efficiency is improved.

    本发明涉及纯电动汽车技术领域,尤其涉及一种车载充电电路、控制方法、系统及纯电动汽车。所述电路包括:主负继电器、预充模块及充电器模块;充电器模块包括车载充电器及慢充继电器;车载充电器在所述预充模块断开时,接收预充电请求指令;车载充电器根据所述预充电请求指令对输出电压进行升压,获取当前输出电压;慢充继电器在预设充电请求电压与所述当前输出电压之间的电压差值小于等于预设差值时导通;车载充电器在慢充继电器与主负继电器均导通时,对所述动力电池进行充电。上述电路使得纯电动汽车在进行慢充充电时,只需闭合主负、慢充继电器,无需经过整车的预充回路进行预充,提升了车载充电效率。


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    Title :

    Vehicle-mounted charging circuit and system, control method of circuit, and pure electric vehicle


    Additional title:

    车载充电电路、控制方法、系统及纯电动汽车


    Contributors:
    WEI JIEHONG (author) / FENG BEIMAO (author) / HUANG ZHEN (author) / DING LEI (author) / WU JIAN (author) / ZHOU ZHENXIANG (author) / ZHU ZHUHONG (author) / ZHANG ZHIQIANG (author)

    Publication date :

    2020-10-16


    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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