锰酸锂动力电池高低温性能研究

Research on high/low temperature performance of LiMn_2O_4 power battery

研究了锰酸锂动力锂离子电池在不同温度下(-20℃和65℃)的充放电性能。结果表明:当温度降到-20℃时,锂离子电池的恒流充电容量仅为充电总容量的6.2%,恒压充电时间延长;相应的放电电压平台也降低。当温度高于65℃时,电池的充电容量仅为常温充电容量的20.8%,充电过程迅速结束,放电性能显著降低。

In recent years, much researches focus on the high/low temperature performance of Li- ion batteries. The charge and discharge characteristics of LiMn2 04 power battery at different temperature（- 20 C, 65 C ）were investigated. The results shows that the charge capacity during constant current process was only 6. 2% of the total charge capacity and the constant voltage charge duration increased at --20 C. The voltage plateaus of discharge also decreased. When the temperature rose up to 65 C, the charge capacity dropped to 20.8% of the capacity obtained at room temperature and the charging process ended quickly.