The invention relates to a control method for charging and discharging a battery pack with low electric quantity, which comprises the following steps: S1, a battery management system distinguishes a charging mode and a discharging mode of a battery according to whether a charging gun is connected or not; s2, a charging voltage under-voltage threshold value a and a discharging voltage under-voltage threshold value b of the battery are set, the charging voltage under-voltage threshold value a is smaller than the discharging voltage under-voltage threshold value b, and in the charging mode, when it is detected that the voltage of the battery is larger than the charging voltage under-voltage threshold value a and smaller than the discharging voltage under-voltage threshold value b, the battery is charged; and the battery management system controls the charging gun to be switched into a battery charging state. After the under-voltage serious fault of the battery cell of the pure electric vehicle is removed, high voltage can be increased and decreased again to enter the charging and discharging process, the charging and discharging operation efficiency of the battery cell can be improved through the design, the vehicle battery pack does not need to be disassembled, and a battery management system can judge that charging is conducted immediately. And the use experience of the user is enhanced.

    本发明涉及一种电池包低电量进入充放电的控制方法,包括以下步骤,S1,电池管理系统根据充电枪的连接与否,区分电池为充电模式与放电模式;S2,设定电池的充电电压欠压阈值为a,放电电压欠压阈值为b,所述充电电压欠压阈值a小于放电电压欠压阈值b,充电模式下,当检测电池电压大于充电电压欠压阈值为a且小于放电电压欠压阈值为b时,电池管理系统控制充电枪切换进入电池充电状态。纯电动汽车电芯欠压严重故障清除后可以重新上下高压进入充放电流程,该设计能够提高电芯的充放电作业效率,且无需拆卸汽车电池包,可使得电池管理系统判定立即进行充电。使得用户的使用体验增强。


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    Titel :

    Control method for charging and discharging of battery pack with low electric quantity


    Weitere Titelangaben:

    一种电池包低电量进入充放电的控制方法


    Beteiligte:
    WEN FENG (Autor:in) / GUO HONGYU (Autor:in) / LING HUAN (Autor:in)

    Erscheinungsdatum :

    2023-03-07


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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