The invention provides a charging circuit, a charging control method, a charging system and an electric vehicle, and relates to the technical field of electric vehicles, the charging circuit comprises a voltage detection unit, a first switch, a second switch and a boosting unit; the voltage detection unit detects an insulation detection voltage value of a charging pile connected with the direct-current charging port and sends the insulation detection voltage value to a power battery management system; when the first switch is closed, the direct-current charging port is connected with the boosting unit, and the boosting unit charges the power battery after boosting the voltage of direct-current input into the direct-current charging port; when the second switch is closed, the direct-current charging port is directly connected with the power battery, and direct current input into the direct-current charging port charges the power battery. According to the charging circuit, due to the fact that the voltage level of the charging pile is determined, the charging mode used by the electric vehicle can be effectively controlled, the automatic selection of the two charging modes is achieved, and the electric vehicle is charged in the optimal charging mode.

    本发明提供了一种充电电路、充电控制方法、充电系统及电动汽车,涉及电动车技术领域,所述充电电路包括:电压检测单元、第一开关、第二开关以及升压单元;电压检测单元检测与直流充电口连接充电桩的绝缘检测电压值,向动力电池管理系统发送绝缘检测电压值;第一开关闭合时,直流充电口与升压单元连接,升压单元将输入直流充电口的直流电的电压升压后,为动力电池充电;第二开关闭合时,直流充电口与动力电池直接连接,输入直流充电口的直流电为动力电池充电。本发明的充电电路,由于明确了充电桩的电压等级,因此可以有效的控制电动汽车使用哪种充电方式,实现两种充电方式的自动选择,使得电动汽车以最优的充电方式进行充电。


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    Title :

    Charging circuit, charging control method, charging system and electric vehicle


    Additional title:

    一种充电电路、充电控制方法、充电系统及电动汽车


    Contributors:
    ZHANG MING (author)

    Publication date :

    2021-06-22


    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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