电工技术学报2016，Vol.31Issue(10)：159-167,9.
基于不同衰退路径下的锂离子动力电池低温应力差异性
The Lithium-Ion Battery Low Temperature Stress Based on Different Degradation Paths
摘要
Abstract
Lithium power battery is usually impacted by low temperature in a particular situation, and its low temperature stress is different with that in initial condition. Taken 35 Ah composite battery as an example, work range of the battery was divided by the transformation curve of the incremental capacity analysis based on different reaction stages of battery charging and discharging process. By aging the batteries at different SOC range, this paper traced the changes of electrochemical properties and analyzed degradation mechanism. Under 0℃ environment, the stress differences under low temperature of batteries which were degraded through different paths, was analyzed usingC/3, 1C, 3C/2, 2C and 5C/2 currents to impact the aging cells by charging and discharging respectively. The result showed that the power battery produced obviously different degradation paths when it cycled at different SOC ranges. There is no mapping relation and consistency between low temperature degradation and cycling degradation. The conclusion provides the basis for battery pack lifetime analysis and second battery matching.关键词
锂离子电池/衰退路径/低温应力/衰退机理Key words
Lithium-ion battery/degradation path/low temperature stress/degradation mechanisms分类
信息技术与安全科学引用本文复制引用
孙丙香,姜久春,韩智强,马泽宇,郑方丹..基于不同衰退路径下的锂离子动力电池低温应力差异性[J].电工技术学报,2016,31(10):159-167,9.基金项目
中澳国际合作项目(2013DFA60930)和北京市科技项目(Z121100006612002)资助. （2013DFA60930）
