The invention belongs to the technical field of battery equalization, and particularly relates to a battery equalization method and a battery management system. The method comprises the following steps: acquiring a state of charge corresponding to a switching inflection point between a platform period and a non-platform period of each battery monomer in a charging process, and finding out a state of charge SOC0 corresponding to the switching inflection point between the platform period and the non-platform period of the battery monomer with the highest voltage from the state of charge SOC0; calculating the difference value SOCi between the state of charge SOCi corresponding to the switching inflection point of the platform period and the non-platform period of each of the rest of the battery monomers and the state of charge SOC0 corresponding to the battery monomer with the highest voltage, calculating the equalization starting time of each of the rest of the battery monomers according to the difference value SOCi, and carrying out the battery equalization according to the equalization starting time of the corresponding battery monomer. And battery equalization in a non-full-charge and non-low-end shelving scene when the battery is in a hybrid working condition is met.

    本发明属于电池均衡技术领域,具体涉及一种电池均衡方法及电池管理系统。该方法包括:获取充电过程中各电池单体平台期与非平台期切换拐点对应的荷电状态,并从中找出电压最高的电池单体平台期与非平台期切换拐点对应的荷电状态SOC0;计算其余各电池单体平台期与非平台期切换拐点对应的荷电状态SOCi与电压最高的电池单体对应的荷电状态SOC0的差值△SOCi,根据差值△SOCi计算其余各电池单体的均衡开启时间,按照相应电池单体的均衡开启时间进行电池均衡,满足了电池处于混动工况时不满充和无低端搁置场景下的电池均衡。


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    Title :

    Battery equalization method and battery management system


    Additional title:

    一种电池均衡方法及电池管理系统


    Contributors:
    WANG GUOQIANG (author) / HU CHUNYANG (author) / SUN WEI (author) / ZHANG HONGTAO (author) / ZHU WEIMENG (author)

    Publication date :

    2024-11-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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