磷酸铁锂电池组典型储能工况循环老化研究  

Study on cycle aging of LiFePO_(4) battery pack under typical energy storage working condition

作　　者：王德顺 薛金花 马林康 WANG Deshun;XUE Jinhua;MALinkang(China Electric Power Research Institute,Nanjing Jiangsu 210003,China;School of Automation,Southeast University,Nanjing Jiangsu 210096,China;National Active Distribution Network Technology Research Center,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]中国电力科学研究院有限公司,江苏南京210003 [2]东南大学自动化学院,江苏南京210096 [3]北京交通大学国家能源主动配电网技术研发中心,北京100044

出　　处：《电源技术》2022年第4期371-375,共5页Chinese Journal of Power Sources

基　　金：中国电力科学研究院有限公司研究开发项目(NY-83-20-001)。

摘　　要：电化学储能系统在调节新能源发电功率波动,电网侧和用户侧削峰填谷场合已经有大规模应用。磷酸铁锂电池由于性能较稳定、循环寿命长、安全性高等特点,被广泛应用到电化学储能领域。然而,电池组容量及其一致性会随使用时间增加而发生劣化,使模组可用容量和能量降低,直接影响电池组的使用寿命。以磷酸铁锂电池模组为研究对象,采用储能电站峰谷调节工况对电池组进行循环测试,研究了电池老化特性及电池组SOC一致性随循环的变化规律并分析其原因,得到的结论可以给电池组的维护提供依据。Electrochemical energy storage system has been widely used in regulating the power fluctuation of new energy generation,as well as the peak load shifting on the grid side and the user side.Lithium iron phosphate batteries have been widely used in the field of electrochemical energy storage due to their stable performance,long cycle life and high safety.However,battery pack capacity and consistency can deteriorate over time.This deterioration reduces the available capacity and energy of the module,directly affecting the battery life.In this paper,the lithium iron phosphate battery module was taken as the research object,and the cycle test of the battery pack was carried out under the peak load shifting condition.We studied the aging characteristics of cell and the variation of SOC consistency of battery pack and analyzed the reasons.The conclusions can provide a basis for the battery module maintenance.

关 键 词：储能电池组 一致性 容量增量分析 电池衰退 

分 类 号：TM912[电气工程—电力电子与电力传动]