摘要
为揭示锂离子电池的低温性能,对35A·h锰酸锂电池单体进行低温下充放电特性实验研究,并通过电压极差对电池的一致性进行分析。结果表明:在低温下,电池的充放电性能显著下降(在-10℃,以10A恒流充电仅能充入额定容量的60.23%;在-40℃下,以10A恒流放电仅能放出额定容量的22%);充放电内阻显著增大,电池一致性变差。因此,锂离子动力电池组须安装加热系统,以确保电动车辆在低温下正常运行。
For revealing the low-temperature performance of lithium-ion battery, an experimental study on the charge-discharge characteristics of a 35A · h lithium manganate battery cell is conducted under low temperature, and the consistency of battery is analyzed by voltage range. The results indicate that at low temperature, the charge- discharge performances of battery drop substantially （under -10℃, the battery can only be charged to 60. 23% of its rated capacity at 10A; and under -40℃ , only 22% of rated capacity can be discharged） , the charging and discharging internal resistances significantly increase and the consistency of battery deteriorates. So it is strongly recommended to use heating devise in lithium-ion battery pack for assuring the normal operation of electric vehicles at low temperature.
出处
《汽车工程》
EI
CSCD
北大核心
2013年第10期927-933,共7页
Automotive Engineering
基金
高等学校学科创新引智计划项目(B12022)
福建省教育厅项目(JA12100)资助
关键词
电动车
锂离子电池
充放电特性
低温性能
electric vehicles
lithium-ion battery
performance charge-discharge characteristics
low-temperature
