摘要
以某型号退役磷酸铁锂软包装电池为样本,分析了电池的放电容量、内阻和自放电特性,研究了电池在不同荷电状态(SOC)下的交流阻抗特性,测试了电池不同倍率和温度下的充放电特性,分析了电池的循环寿命和日历寿命,测试了电池在滥用条件下的安全性能。结果表明:该电池的容量在额定容量的85%左右,多数电池内阻在2.4~3.4 mΩ,搁置28天后的容量保持率在97%以上,随着SOC的降低,电荷传递阻抗开始逐渐增大;在25℃下具有良好的循环特性,但在45℃环境下,循环性能明显下降,在常温下具有良好的日历寿命;在0℃及以上温度时,该电池具有良好的倍率充放电性能;该电池可通过多项安全试验,表现出较好的安全性能。
With a retired lithium iron phosphate pouch batteries as an object,the discharge capacity,internal resistance and self-discharge were analyzed,the AC impedance characteristics under different charged state were tested,the charging and discharging characteristics of the different rate and different temperature conditions were researched,the cycle life and calendar life were tested and the security performance of the battery under the abuse condition were researched.The results show that the capacity of the battery in about 85%of the rated capacity,the majority of battery internal resistance between 2.4~3.4 mΩ,after 28 days standing,the capacity retention ratio is above 97%,with the decrease of the SOC,the charge transfer impedance begins to increase gradually.At 25℃,it has a good cycle performance,but at 45℃,the cycle performance is significantly reduced.At room temperature,it has a good calendar life.When the temperature is 0℃or above,the battery has good rated charging-discharge characteristics.The battery can pass many safety tests and show good safety performance.
作者
梅简
裘吕超
惠洋
赵洲峰
邹君文
MEI Jian;QIU Lvchao;HUI Yang;ZHAO Zhoufeng;ZOU Junwen(E.Energy Technology Co.,Ltd.,Hangzhou Zhejiang 310014,China;State Grid Zhejiang Electric Power Research Institute,Hangzhou Zhejiang 310014,China)
出处
《电源技术》
CAS
北大核心
2021年第8期996-1000,共5页
Chinese Journal of Power Sources
基金
杭州意能电力技术有限公司科技项目(EPRD2019-15)。
关键词
退役电池
磷酸铁锂
性能评估
retired batteries
lithium iron phosphate
performance evaluating
