基于电感储能的退役电池双层均衡方法研究  

Research on double-layer equalization method of retired batteries based on inductive energy storage

作　　者：吴铁洲[1] 谢有焰 查欢 WU Tiezhou;XIE Youyan;ZHA Huan(Hubei Provincial Key Laboratory of Solar Energy Efficient Utilization and Energy Storage Operation Control,Hubei University of Technology,Wuhan Hubei 430068,China)

机构地区：[1]湖北工业大学太阳能高效利用及储能运行控制湖北省重点实验室,湖北武汉430068

出　　处：《电源技术》2023年第9期1148-1152,共5页Chinese Journal of Power Sources

摘　　要：由于退役锂电池更易产生不一致性,为了提高退役电池的均衡速度,设计了一种梯次利用的退役电池双层均衡方法。将多电感与单电感的均衡拓扑进行结合,构建双层式的均衡拓扑结构,提出了比较电池组内和组间荷电状态(SOC)差异,确定组内、组间均衡先后顺序的均衡策略,并采用极差和均值比较算法相结合实现电池均衡。通过6节电池的均衡实验表明,该均衡方法能快速有效地改善退役电池组的不一致性,相较于传统的多层电感均衡系统,充电均衡和放电均衡时间分别缩短了33.5和58.8 s。Since retired lithium batteries are more likely to produce inconsistency,in order to improve the equalization speed of retired batteries,a double-layer equalization method of retired batteries with echelon utilization was designed.The balanced topology of multi-inductor and single inductor was combined to construct a double-layer balanced topology structure.A balanced strategy was proposed to compare the SOC difference between battery packs and groups to determine the balance sequence between groups,and the range and mean comparison algorithm was combined to realize the battery balance.The equalization experiment of 6 batteries shows that the equalization method designed in this paper can quickly and effectively improve the inconsistency of retired battery packs.Compared with the traditional multi-layer inductor equalization system,the charging equalization time and discharge equalization time are shortened by 33.5 and 58.8 s respectively.

关 键 词：退役锂电池 双层均衡 电感均衡 均衡方法 

分 类 号：TM912[电气工程—电力电子与电力传动]