电动车用锂离子电池低温性能研究  

A Study on the Low-temperature Performance of Lithium-ion Battery for Electric Vehicles

作　　者：雷治国[1,2] 张承宁[1] 李军求[1] 范广冲[1] 林哲炜 

机构地区：[1]北京理工大学,电动车辆国家工程实验室,北京100081 [2]福建农林大学机电工程学院,福州350002 [3]福建省宁德出入境检验检疫局,宁德355017

出　　处：《汽车工程》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

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.

关 键 词：电动车 锂离子电池 充放电特性 低温性能 

分 类 号：TM912[电气工程—电力电子与电力传动]