The invention discloses a method for reducing the voltage difference of an equalization circuit and improving the equalization efficiency. The method comprises the steps: S1, connecting a battery system in series, and connecting forty single batteries in series to form a battery system; S2, arranging isolation transformers, connecting the single batteries with the isolation transformers in parallel; S3, setting an auxiliary battery, arranging the auxiliary battery in the system; S4, setting a battery system BMS, connecting the battery module electrically with the battery system BMS; S5, in thecharging and discharging processes, providing power for single low-voltage batteries; S6, in the charging and discharging processes, discharging the single high-voltage batteries; S7, in the chargingand discharging processes, independently carrying out charging and discharging when the voltages of the multiple groups of single batteries are too high or too low. Therefore, the voltage differencebetween the equalization source and the single battery cells is reduced through the auxiliary battery, the unified auxiliary power supply/lead-acid battery is used as the equalization source, the voltage difference of different power supplies is reduced, the electric energy conversion rate is improved, and the battery consistency is improved.

    本发明公开了一种缩小均衡电路电压差和提高均衡效率的方法,S1、串联电池系统,四十个单体电池串联成电池系统;S2、设置隔离变压器,单体电池上均并联有隔离变压器;S3、设置辅助电池,在系统内设有辅助电池;S4、设置电池系统BMS,在电池模组上电性连接有电池系统BMS;S5、充放电过程中,给单体低压电池供电;S6、充放电过程中,单体高压电池放电;S7、充放电过程中,多组单体电池的电压过高或者过低,单独充放电;本发明通辅助电池缩小均衡源与单体电芯的电压差,采用统一的辅助电源/铅酸电池做为均衡源,缩小不同电源的电压差提高电能转化率,和提高电池一致性。


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    Title :

    Method for reducing voltage difference of equalization circuit and improving equalization efficiency


    Additional title:

    一种缩小均衡电路电压差和提高均衡效率的方法


    Contributors:
    HU QINGJUN (author) / ZHU XU (author) / LI CHENG (author)

    Publication date :

    2020-07-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    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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