On the basis of an existing equalization loop, a parallel equalization loop is added, a first pressure difference upper limit threshold and a second pressure difference upper limit threshold are set, and if the first pressure difference upper limit threshold is smaller than the second pressure difference upper limit threshold, when an equalization strategy is triggered, the first pressure difference upper limit threshold is not smaller than the second pressure difference upper limit threshold. The equalization strategy corresponding to the first pressure difference upper limit threshold value is firstly started, the equalization strategy corresponding to the second pressure difference upper limit threshold value is triggered after the second pressure difference upper limit threshold value is reached, and the equalization loop is correspondingly controlled to be started or closed according to the temperature of the equalization internal resistor in the equalization loop. The first equalization loop and the second equalization loop are switched back and forth, so that the equalization current is increased or reduced, the equalization time is further shortened, and the service life of the battery is prolonged.

    本发明提出了一种电池组的均衡系统及方法,在现有的均衡回路的基础上,增加一个并联的均衡回路,并设置第一压差上限阈值和第二压差上限阈值,第一压差上限阈值小于第二压差上限阈值,则在均衡策略触发时,第一压差上限阈值对应的均衡策略先启动,在达到第二压差上限阈值后触发第二压差上限阈值对应的均衡策略,并且根据均衡回路中均衡内阻的温度,相应控制均衡回路的启动或关闭。通过第一均衡回路和第二均衡回路来回切换的方式,实现均衡电流的增大或减少,进一步减少均衡时间,延长电池寿命。


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    Title :

    Balancing system and method of battery pack


    Additional title:

    一种电池组的均衡系统及方法


    Contributors:
    ZHANG CHUANLONG (author) / LUO JIATAO (author) / LI WENBO (author) / LIU TAO (author) / HUANG YUANYUAN (author) / QIN XIAOQING (author)

    Publication date :

    2024-10-22


    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 / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY



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