The invention provides a battery capacity balancing method, system and device based on capacity difference and a medium, and relates to the field of new energy batteries, and the method comprises the steps: obtaining discharge data in a vehicle driving process; the discharge data comprises current, voltage and time in the discharge process; determining the battery capacity corresponding to each moment in the vehicle driving process according to the current and the time; based on a built battery model, determining the open-circuit voltage of each battery monomer at each moment according to the voltage by using a parameter identification method; determining the capacity difference between the single batteries according to the open-circuit voltage and the battery capacity; formulating an equalization strategy according to the capacity difference between the positioning capacities of the single batteries; and performing equalization control on each single battery in the battery system according to the equalization strategy. According to the invention, the capacity balance among the single batteries can be realized.

    本发明提供了基于容量差异的电池容量均衡方法、系统、设备及介质,涉及新能源电池领域,该方法包括:获取车辆行驶过程中的放电数据;所述放电数据包括放电过程中的电流、电压以及时间;根据所述电流以及所述时间确定在所述车辆行驶过程中每个时刻对应的电池容量;基于搭建的电池模型,利用参数辨识法根据所述电压确定每个电池单体每个时刻的开路电压;根据所述开路电压以及所述电池容量确定电池单体之间的容量差异;根据每个电池单体的定位容量之间的容量差异制定均衡策略;根据所述均衡策略对电池系统中的各个电池单体进行均衡控制。本发明能够实现电池单体之间的容量均衡。


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    Title :

    Battery capacity balancing method, system and equipment based on capacity difference and medium


    Additional title:

    基于容量差异的电池容量均衡方法、系统、设备及介质


    Contributors:
    SU LIANG (author) / REN YONGHUAN (author) / SUN WEIJIA (author) / SONG KWANG-KIL (author) / LUO BIN (author) / HONG SHAOYANG (author) / LIMBERS (author) / WU GUOGUI (author) / LIU RONGHAN (author)

    Publication date :

    2024-01-19


    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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