The invention provides an electric vehicle overcharge prevention method and system, and the method comprises the steps: building a vehicle pile mutual verification protocol through a vehicle end battery management system and a charging pile when an electric vehicle is charged, and carrying out the overcharge prevention of the electric vehicle according to the vehicle pile mutual verification protocol; when the error of the charge state calculated by the vehicle end battery management system and the charge state calculated by the charging pile exceeds a preset charge state error threshold value, charging is stopped, and otherwise, charging is continued; when the charge state amplification of the power battery reaches the preset charge state, the charging is stopped when the difference between the charging electric quantity calculated by the vehicle end battery management system and the charging pile is greater than the value of a preset charging electric quantity check formula, otherwise, the charging is continued until the electric vehicle is fully charged; according to the invention, a multi-source anti-overcharge strategy is formed based on the vehicle end battery management system end, the vehicle pile end, the charge state, the charging electric quantity and the residual charging electric quantity, the occurrence of an overcharge behavior of the electric vehicle can be effectively avoided, and thus the safety of the electric vehicle is improved.

    本发明专利申请提供了一种电动汽车防过充方法和系统,包括:当电动汽车进行充电时,通过车端电池管理系统与充电桩建立车桩相互校验协议,并根据车桩相互校验协议,当车端电池管理系统与充电桩计算的荷电状态的误差超过预先设置的荷电状态误差阈值时,停止充电,否则继续充电;当动力电池的荷电状态增幅达到预先设定的荷电状态时,通过车端电池管理系统与充电桩分别计算充电电量之差大于预先设定的充电电量校验式的值时,停止充电,否则继续充电,直至电动汽车充满电为止;本发明专利申请基于上述车端电池管理系统端、车桩端、荷电状态、充电电量和剩余充电电量构成了多源的防过充策略,可有效提避免电动汽车过充行为的发生,从而提高其安全性。


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    Title :

    Anti-overcharging method and system for electric vehicle


    Additional title:

    一种电动汽车防过充方法和系统


    Contributors:
    ZHANG YUANXING (author) / LI BIN (author) / ZHANG JIAN (author) / LI TAOYONG (author) / DIAO XIAOHONG (author) / XU KE (author) / ZU GUOQIANG (author) / LU YIMENG (author) / LIU XIAONAN (author) / WANG ZHISHUANG (author)

    Publication date :

    2024-01-30


    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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