The invention discloses a low-voltage lithium battery equalization control method and a battery management system thereof, and aims at enabling the voltage difference of a battery cell to be less than 10mV after the battery is fully charged, and enabling the battery to achieve the optimal performance at a high speed under the condition of constant-voltage charging of a vehicle generator. The control method comprises the following steps: voltage difference control: a low-voltage lithium battery management system (hereinafter referred to as LBMS) obtains all monomer voltages of a battery, and starts a battery cell of which the monomer voltage is greater than a threshold value I and the voltage difference is greater than a minimum monomer voltage difference threshold value; and voltage value control: the LMBS obtains all the monomer voltages of the battery, and only starts the monomer equalization of which the monomer voltage is greater than the threshold value 2.

    一种低压锂电池均衡控制方法及其电池管理系统,低压锂电池均衡开启目的使电池满充后电芯压差<10mV,在车辆发电机恒压充电的条件下,电池快速度达到最佳性能,其控制方式包括:压差控制:低压锂电池管理系统(以下简称LBMS)获取电池全部单体电压,开启单体电压>阈值一且压差大于最低单体电压压差阈值的电芯;电压值控制:LMBS获取电池全部单体电压,只开启单体电压>阈值二的单体均衡。


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    Title :

    Low-voltage lithium battery equalization control method and battery management system thereof


    Additional title:

    一种低压锂电池均衡控制方法及其电池管理系统


    Contributors:
    HE BAISHENG (author) / LIU CHANGLAI (author) / XIA SHIZHONG (author) / SUN GUANGZHONG (author) / XIE ZHENGAN (author) / LOU YONGGANG (author)

    Publication date :

    2023-07-04


    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 / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / 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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