软碳掺杂对大容量锂离子电池低温性能的影响  

Effects of soft carbon doping on low temperature performance of large capacity LiFePO_4 batteries

作　　者：刘萍[1] 高飞[1] 张娜[1] 张俊英[1] 李加林[1] LIU Ping;GAO Fei;ZHANG Na;ZHANG Jun-ying;LI Jia-lin(Tianjin Lishen Battery Joint-Stock Co., Ltd., Tianjin 300384, China)

机构地区：[1]天津力神电池股份有限公司,天津300384

出　　处：《电源技术》2017年第8期1112-1113,1170,共3页Chinese Journal of Power Sources

摘　　要：锂离子电池的低温性能是制约锂离子电池发展的重要因素之一。研究了负极中掺杂20%软碳的电池样品在低温条件下的倍率充电性能、低温放电性能及低温循环性能。实验结果表明,负极掺杂20%软碳的锂离子电池,-10、-20℃充电容量分别能达到25℃时充电容量的91.11%和81.74%;-20℃循环50次,剩余容量为低温初始容量的91.91%。Li-ion battery was an environment friendly new power source,but the difficulty of charging at a subzero temperature was an obstacle for the development.20%soft carbon was added into MCMB,and analyzed the charging,discharging and cycle life performance at low temperature were analyzed.As a result,with20%percentage of soft carbon added,charging at-10℃and-20℃,compared with25℃,the total charging capacity is91.11%and81.74%;cycle at-20℃for50times,the residual capacity is about91.91%of the first cycle.

关 键 词：低温倍率充电 低温放电 低温循环 

分 类 号：TM912[电气工程—电力电子与电力传动]