一种锂电池并行填谷的均衡电路研究

Research on Lithium Battery Balance Circuit with Parallel Filling Valley Balancing

针对传统主动均衡电路存在的硬件成本、控制复杂度、均衡速度等问题,提出了并行填谷主动均衡的方法,建立了三种并行填谷主动均衡拓扑架构及PWM控制策略模型。其中,单PWM波原边选通均衡电路具有硬件成本低、灵活性适中、均衡效果好等特点,基于该驱动电路,设计实现了并行填谷电池管理系统。测试结果表明,充电均衡时,电池组电压极差可在30min内从535.2m V降低到9.0m V,表明该均衡策略的有效性和实用性。

This paper proposes a parallel filling valley balancing circuit.Three parallel filling valley balancing circuit topolo- gy architectures are built with the corresponding PWM control strategy models.The single PWM drive circuit for the original side switch has the advantages of low hardware cost,good flexibility and better balancing performance.A parallel filling valley balancing battery management system was implemented based on it.