The invention provides an active equalization charging device and method for a power battery, and aims to solve the problems that an active equalization device cannot perform bidirectional equalization charging, grouping equalization charging and battery adjacent and non-adjacent equalization charging at the same time. The system comprises a main controller, a battery management system (BMS), n equalization charging modules, n battery cells, n transmission bus isolation switches, and two charge transmission buses B+ and B-. According to the device, battery cell grouping parallel equalization, charge bidirectional, adjacent and non-adjacent transmission, energy leap type transmission and no equalization overlapping problem can be realized, the equalization effect is good, the expansion is easy, and the circuit is easy to realize. In addition, the direct non-adjacent charge transfer maintains the service life of the intermediate battery by reducing the charge-discharge period of the intermediate battery and minimizing the loss caused by the number of charge transfer steps, and the energy transfer efficiency of the equalization process is also improved.
本发明提供了一种动力电池的主动均衡充电装置及方法,其目的在于解决主动均衡装置不能同时进行双向均衡充电、分组均衡充电、电池相邻和非相邻均衡充电的问题。本发明包括一个主控制器,一个电池管理系统(BMS),n个均衡充电模块,n个电池单体,n个传输总线隔离开关,两条电荷传输总线B+和B‑。本发明可实现电池单体分组并行均衡,电荷双向、相邻和非相邻传输,能量跨越式传递、无均衡重叠问题、均衡效果良好、易于扩展且电路易于实现。此外,直接非相邻电荷转移通过减少中间电池的充放电周期和最小化电荷转移步骤的数量所带来的损耗来维持中间电池的寿命,还提高了均衡过程的能量转移效率。
Active equalization charging device and method of power battery
一种动力电池的主动均衡充电装置及方法
2021-04-13
Patent
Electronic Resource
Chinese
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