中文摘要：

基于蓄电池的储能系统中采用多个电池串联,由于蓄电池单体的特性差异导致储能系统充放电过程中某些电池电压过高或过低,缩短了系统寿命,降低了可靠性。为此,提出了一种适用于大规模蓄电池单体均压的模块化拓扑结构,分析了其开关状态和等效电路模型,得出了能量转移规律和模型,建立了均压电路的控制策略,仿真和实验结果表明,所提出的均压电路工作正确,可以实现多个蓄电池单体的串联均压,且扩展性好,控制简单,具有较好应用前景。

英文摘要：

Several batteries are connected in series in the storage system. Because of the differences among the batteries, the voltages of some batteries can be too high/low in the charging/discharging processes, which may shorten the lifetime of the system and reduce the reliability. We proposed a modular equalization topology for the batteries in series, and analyzed the switching states and the equivalent circuits. Furthermore, we calculated the law of the energy delivered in every cycle, proposed a model, and proposed a control strategy. The simulation and experimental results can verify the proposed topology and strategy. The system works normally and can be expanded in a simple way. Also the control is easy. Thus the topology is practical.