摘要
锂离子动力电池单体电压、容量、内阻等参数的不一致是影响成组后电池组性能的重要因素。为分析锂离子动力电池的不一致性,在不破坏电池的前提下,对批量10 Ah锂离子单体电池进行常温0.35 C、0.5 C、0.65 C、0.8 C、0.95 C不同倍率放电实验。实验结果证明倍率大小对电池的交流电阻和放电容量影响不大,而对电池的放电平均电压有较大影响,随着电流的递增(ΔI=0.15 C),电池的放电平均均压减小(ΔV约为16 mV),个别异常电池的放电均压随着放电倍率的增大而呈现不规则的减小。随着放电倍率的增大,电池的不一致性得到了放大,达到剔除不良电池的效果。
Lithium ion battery needs to be used in group,so the consistency of the battery is very important.In order to analyze the consistency of the battery,the charging and discharging experiment was done.Without destroying the battery performance of the premise,the current was increased from 0.35 C to 0.95 C（ΔI=0.15 C）.Based on the experiment,the strength of the current had no effect on batteries’ resistance and capacity.But the battery discharge average voltage would reduce with the current.The inconformity of the battery got magnified.And the abnormal battery could be picked out.
出处
《电源技术》
CAS
CSCD
北大核心
2013年第3期427-429,477,共4页
Chinese Journal of Power Sources
关键词
一致性
放电平均电压
放电容量
交流内阻
放电倍率
consistency
discharge average voltage
discharge capacity
exchange impedance
discharge current
