锂离子电池的老化特性分析  

Analysis on aging characteristics of lithium-ion batteries

作　　者：丁黎[1] 李帆[1] 蔡文嘉[1] 汪旭祥 刘莉[1] DING Li;LI Fan;CAI Wen-jia;WANG Xu-xiang;LIU Li(Measurement Center,State Grid Hubei Electric Power Company,Wuhan Hubei 430080,China)

机构地区：[1]湖北省电力公司计量中心,湖北武汉430080

出　　处：《电源技术》2019年第1期77-80,共4页Chinese Journal of Power Sources

摘　　要：锂离子电池存储寿命是性能评价的重要指标之一。以18650型锂离子电池为研究对象,开展加速老化试验,分析日历老化和循环老化两种方式对电池容量衰减、内阻增加的影响,分析环境温度、存储电压与荷电状态对电池老化效果影响,基于加速试验数据,建立电池寿命预测模型,经分析计算认为:日历老化是引起电池老化加速的主导因素,存储过程中日历老化程度与存储时间的0.5次方近似成线性关系。Aging behavior and storage lifetime are important indexes of the lithium-ion batteries performance evaluation.18650 lithium-ion battery was chosen to be carried out the accelerated aging test,and the influences of the calendar aging and cycle aging on the capacity attenuation,and resistance increase were analyzed.The influences of the ambient temperature,storage voltage and charged state on aging effect of battery were analyzed.Based on the accelerated test data,a battery life prediction model was established.According to the analysis and calculation,calendar aging is the leading factor causing battery aging acceleration,and the calendar aging degree in the storage process is approximately linear with the storage time to the power of 0.5.

关 键 词：锂离子电池 日历老化 循环老化 寿命预测 

分 类 号：TM912.9[电气工程—电力电子与电力传动]