The invention relates to a reverse charging system of an auxiliary system of a pure electric commercial vehicle. The reverse charging system comprises a whole vehicle power battery, a whole vehicle VCU, a low-voltage generator controller, a low-voltage engine, an auxiliary system microcontroller, a driving motor and an auxiliary system reduction gearbox. A battery management system is arranged in the whole vehicle VCU, collects a whole vehicle power battery electric quantity signal, sends a low-voltage alarm signal to a whole vehicle controller when the battery electric quantity is insufficient, and meanwhile controls the whole vehicle power battery to stop supplying power to an auxiliary system of the vehicle. The whole vehicle controller outputs a control signal to the low-voltage generator controller, the low-voltage generator drives the reduction gearbox of the auxiliary system of the pure electric commercial vehicle to continue to operate. Meanwhile, current is generated when the driving motor operates and inputs charging current to the whole vehicle power battery through the auxiliary system. According to the invention, the system generator charges the low-voltage battery, and when the power battery is insufficient, normal operation of the auxiliary system and reverse charging of the power battery of the whole vehicle are realized.

    本发明涉及一种纯电动商用车辅助系统的返充系统,该反充系统包括整车动力电池、整车VCU、低压发电机控制器、低压发动机、辅助系统微控制器、驱动电机和辅助系统减速箱;整车VCU中设置有电池管理系统,电池管理系统采集整车动力电池电量信号,当电池电量不足时向整车控制器发出低压报警信号,同时电池管理系统控制整车动力电池停止对车辆的辅助系统供电,整车控制器输出控制信号给低压发电机控制器,低压发电机驱动纯电动商用车辅助系统减速箱继续运转,同时驱动电机运转时产生电流通过辅助系统向整车动力电池输入充电电流。本发明实现系统发电机对低压电池充电,在动力电池电量不足时,实现辅助系统正常运转并对整车动力电池的返向充电。


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    Title :

    reverse charging system of auxiliary system of pure electric commercial vehicle


    Additional title:

    一种纯电动商用车辅助系统的返充系统


    Contributors:
    LI MINGTAO (author) / ZHOU YAWEI (author) / QI LIJIAN (author) / YU YUAN (author) / ZHANG SHIJING (author)

    Publication date :

    2021-12-31


    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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