基于小波复合模型的锂电池阻抗特性研究  

Characteristic study of impedance of Li-ion battery based on wavelet mix model

作　　者：陈小军[1] 韩晓娟[1] 梁亮 李建林 

机构地区：[1]华北电力大学控制与计算机工程学院,北京102206 [2]中国电力科学院电工与新材料研究所,北京100192

出　　处：《电源技术》2012年第1期67-70,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金资助项目(50907067);国家科技部"973"资助项目(2010CB227206)

摘　　要：储能系统是实现智能电网能量双向流动的重要支撑条件,而大规模成组技术是大规模锂电池储能系统的发展瓶颈。针对锂电池放电时电压特性,将小波分析理论与锂电池等效电路模型相结合,并对SOC(State Of Charge,电池剩余容量)、电池内阻、放电时间之间的三维关系开展了研究,得出电池内阻随放电时间和SOC的变化在不同阶段有不同的变化趋势的结论,提出了电池管理系统中的单体电池切除的理论判断依据,预计对SOC的精确估计有较大的借鉴意义。Power storage system is the most important supporting part of energy bidirectional flowing of smart grid,and large-scale group technology is the development bottleneck of large-scale power storage system.By combining Li-ion battery equivalent circuit model with wavelet analysis on the basis of discharging characteristic of Li-ion battery,analyzing the 3-D relationship among resistance of battery,SOC and time of discharge,the conclusion that the trend of resistance of battery was different in different phase was presented.It was also the basic theory judgement for single battery removing of batteries manages system.And it might also provide a reference for precise estimate of SOC.

关 键 词：小波分析 复合模型 电池内阻 锂电池组 SOC 

分 类 号：TM912[电气工程—电力电子与电力传动]