The invention provides a current control method and device for a vehicle direct current charging system, and the method comprises the following steps: obtaining the rated capacity and the current charge state of a vehicle power storage battery; calculating the capacity and the charging acceptance rate of the battery to be charged according to the rated capacity and the current state of charge; dividing the to-be-charged battery capacity into multiple sections of to-be-charged charge capacities according to a preset fixed interval; calculating the optimal charging current at the moment corresponding to each section of charge capacity to be charged; and updating the current required for charging the vehicle according to the optimal charging current. The charging current can be dynamically adjusted, so that the polarization of the vehicle power storage battery is reduced, the charging rate of the vehicle is improved, and the service life of the vehicle power storage battery is prolonged.

    本发明提供一种车辆直流充电系统的电流控制方法和装置,其中,所述方法包括以下步骤:获取车辆动力蓄电池的额定容量和当前荷电状态;根据所述额定容量和当前荷电状态计算待充入电池容量和充电接受率;将所述待充入电池容量按预设固定间隔分为多段待充入电荷容量;计算每一段所述待充入电荷容量对应时刻的最优充电电流;根据所述最优充电电流对车辆充电所需求的电流进行更新。本发明能够动态调整充电电流的大小,从而降低车辆动力蓄电池的极化,提高车辆的充电速率,延长车辆动力蓄电池的使用寿命。


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    Title :

    Current control method and device of vehicle direct current charging system


    Additional title:

    车辆直流充电系统的电流控制方法和装置


    Contributors:
    XU JIAWEI (author) / ZHANG XUEKAI (author) / YANG XIAOFEI (author) / ZHANG JUN (author)

    Publication date :

    2024-04-19


    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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