The invention discloses an electric quantity balancing method and system for a vehicle battery pack and a vehicle, and the method comprises the steps: collecting the battery data of the vehicle battery pack if the vehicle is in a power-on state, and the vehicle meets a balancing condition for triggering balancing; calculating equalization time and electric quantity required by equalization according to the battery data, and selecting an equalization mode according to a use scene and a use habit; acquiring the number of low-voltage battery cells, if the number of the low-voltage battery cells is smaller than or equal to the number of preset battery cells, selecting a storage battery with preset voltage to charge the low-voltage battery cells until the target electric quantity is reached through equalization, and if the number of the low-voltage battery cells is larger than the number of the preset battery cells, selecting the storage battery with the preset voltage to charge the low-voltage battery cells. If yes, reducing the electric quantity of the high-electric-quantity battery cell to the target electric quantity in a resistance power consumption mode. According to the method, the equalization condition for triggering battery equalization is added, the equalization mode is intelligently selected, the equalization time is accurately calculated, error equalization is avoided, charging equalization or discharging equalization is selected according to conditions, the performance of the vehicle battery pack is improved, and the service life of the vehicle battery pack is prolonged.

    本申请公开了一种车辆电池包的电量均衡方法、系统及车辆,所述方法包括:若车辆处于上电状态,且车辆满足触发均衡的均衡条件时,采集车辆电池包的电池数据;根据所述电池数据计算得到均衡时间和均衡所需电量,并根据使用场景和使用习惯选择均衡方式;获取低压电芯数,如果所述低压电芯数小于或者等于预设电芯数量,则选择预设电压的蓄电池对低压电芯进行补电,直到均衡达到目标电量,如果所述低压电芯数大于所述预设电芯数量,则采用电阻耗电方式将高电量电芯电量降低到目标电量。本申请增加了触发电池均衡的均衡条件,智能选择均衡方式,精准计算均衡时间,避免误均衡发生,根据情况选择补电均衡或者放电均衡,提升了车辆电池包的性能及使用寿命。


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    Title :

    Electric quantity balancing method and system for vehicle battery pack and vehicle


    Additional title:

    一种车辆电池包的电量均衡方法、系统及车辆


    Contributors:
    KOU CONGCONG (author) / YOU HONGYI (author) / ZHANG JINTAI (author)

    Publication date :

    2023-11-14


    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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