电源技术2017，Vol.41Issue(3)：364-366,398,4.
磷酸铁锂动力电池寿命中期低温安全性能
Low-temperature safety performance of middle-life lithium iron phosphate batteries
摘要
Abstract
Firstly,the lithium iron phosphate power batteries with the remaining capacity of 84％ were charged and discharged at 25,0 and-10 ℃.Second,the batteries performed the thermal safety experiment (ARC) at different temperatures.Finally,the batteries were disassembled after different temperature cycles.The physical and chemical properties of the positive and negative electrode materials were analyzed by X ray diffraction (XRD) and scanning electron microscopy (SEM).The results indicate that the low temperature performance of the batteries is poor,and the capacity retention rate is 100％,93.5％ and 20％ after 50 cycles,cycled at 25,0 and-10 ℃.Thermal safety performance of battery after low temperature cycling is reduced.The thermal incontrollable temperature of the batteries are 165,157 and 108 ℃ after 50 cycles,cycled at 25,0 and-10 ℃.In the process of low temperature cycling,the electrochemical reaction of the battery is irreversible.The surface of the cathode has the lithium dendrite,which is the main reason for the low temperature performance degradation and the safety performance degradation.关键词
磷酸铁锂/低温性能/锂枝晶/热失控/梯次利用Key words
lithium iron phosphate/low temperature performance/lithium dendrite/thermal incontrollable/echelon use分类
信息技术与安全科学引用本文复制引用
王绥军,傅凯,徐斌,刘曙光,官亦标..磷酸铁锂动力电池寿命中期低温安全性能[J].电源技术,2017,41(3):364-366,398,4.基金项目
国家电网科技项目 （）
