The invention relates to the technical field of active equalization units, and discloses an active equalization circuit of a power battery. The power battery comprises a plurality of battery units which are connected in series, and the active equalization circuit comprises a battery end interface unit which is used for being connected with a battery unit to be equalized; the low-voltage side of the voltage conversion unit comprises a plurality of low-voltage conversion sub-modules, each low-voltage conversion sub-module is connected with the corresponding battery unit, and the high-voltage side of the voltage conversion unit is connected with the power battery. According to the active equalization circuit of the power battery, the battery unit to be equalized is discharged through the battery end interface unit connected with the battery unit to be equalized, energy released by the battery unit is transferred to the whole power battery through the voltage conversion unit, and different control strategies are adopted for two working modes of constant current and constant voltage of a charger; the real-time equalization of the power battery is realized, and the equalization efficiency is improved.

    本发明涉及主动均衡单元技术领域,公开了一种动力电池的主动均衡电路。动力电池包括多个串联的电池单元,所述主动均衡电路包括:电池端接口单元,用于与待均衡的电池单元连接;电压变换单元,所述电压变换单元的低压侧包括多个低压变换子模块,每个所述低压变换子模块与对应的所述电池单元连接,所述电压变换单元的高压侧与所述动力电池连接。该动力电池的主动均衡电路通过与待均衡电池单元连接的电池端接口单元对需要均衡的电池单元进行放电,通过电压变换单元将电池单元释放的能量转移到整体的动力电池,针对充电机的恒流、恒压两种工作模式采用不同的控制策略,实现了动力电池的实时均衡,提高了均衡效率。


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    Title :

    Active equalization circuit of power battery


    Additional title:

    动力电池的主动均衡电路


    Contributors:
    ZENG GUOJIAN (author) / JI XIANG (author) / CAI HUAJUAN (author) / ZHUAN SUNMINGMING (author)

    Publication date :

    2024-05-03


    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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