退役锂电池性能评估及光储应用研究  

Performance assessment and PV energy storage application of retired Li-ion battery

作　　者：张友琅 张利中[1] 刘怡 沈晓枉 廖强强[1] ZHANG You-lang;ZHANG Li-zhong;LIU Yi;SHEN Xiao-wang;LIAO Qiang-qiang(Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power,Shanghai 200090, China;Shanghai Jicxin Power Battery System Limited Company, Shanghai 201805, China;State Grid Shanghai Municipal Electric Power Company, Shanghai 200122, China)

机构地区：[1]上海电力学院上海市电力材料防护与新材料重点实验室,上海200090 [2]上海捷新动力电池系统有限公司,上海201805 [3]国家电网上海市电力公司,上海200122

出　　处：《电源技术》2019年第7期1136-1139,共4页Chinese Journal of Power Sources

基　　金：上海市自然科学基金(17ZR1411200);教育部人文社会科学研究规划基金(16YJAZH035);上海市联盟计划(LM201658)

摘　　要：以标称容量为60 Ah的退役磷酸铁锂电池模块为研究对象,通过容量标定、电化学阻抗谱测试、电池模块内部并联模组电压测量等方法研究电池衰退性能,分析电池容量与内阻、电压和锂离子扩散系数之间的相关性,并将一致性好的退役电池模块成组后接入到光伏储能系统中,验证退役电池在光伏储能的可行性。研究表明,欧姆内阻、电荷转移电阻、锂离子扩散系数与退役电池模块的容量之间无明显的相关性,这些参数作为该类退役电池一致性评估的可靠性程度较低;而低电荷状态(SOC)下退役电池模块内并联模组之间的最大电压差ΔUmax值与容量之间呈现较好的线性负相关。The fading characteristics of 60 Ah retired Li-ion battery modules from electric vehicles were evaluated by battery capacity measurement, electrochemical impedance spectroscopy and voltage measurement of parallel modules. The correlation between the capacity and internal resistance, lithium ion diffusion coefficient or voltage was analyzed. The consistent retired battery modules were packed and switched in a photovoltaic energy storage system to verify the application feasibility of the PV energy storage. The results show that there is no obvious correlation between the capacity of the retired battery modules and the ohmic resistance, charge transfer resistance or Li-ion diffusion coefficient, whose reliability is low as the consistency index of the retired battery modules. There is linear negative correlation between the capacity of the retired modules and the maximal voltage difference ΔUmax among parallel modules at low SOC.

关 键 词：退役锂电池 容量 电化学阻抗谱 电压 光伏发电 

分 类 号：TM912[电气工程—电力电子与电力传动]