重庆理工大学学报（自然科学版）2018，Vol.32Issue(6)：8-13,6.DOI:10.3969/j.issn.1674-8425(z).2018.06.002
充电倍率对高功率型磷酸铁锂动力电池循环寿命影响的研究
Study on Cycle Life of LFP High Power Traction Battery Under Different Charge Rate
摘要
Abstract
Taking the LFP batteries for high power application as the research objects,carry out cycle life tests under different charging rate,and verify the influence of the charge rate on the battery cycle life.Via analyzing the important parameters including discharge DC resistance,discharge power and discharge capacity,the battery life model under different charge rates is established.The results show that the internal resistance of the sample discharge increases with the increase of the number of cycles,and the charge rate has an impact on the growth rate and the growth rate.The discharge power of the sample decays continuously with the increase of the number of cycles,and both the attenuation rate and the amplitude are influenced.The discharge capacity shows a declining tendency of the second order polynomial with the increase of the number of cycles,which accords with the formula y＝a +bx +cx2.Finally,the research group set the discharge capacity as the characterization parameters of battery cycle life and constructed the life model with different charging rates and cycles.关键词
充电倍率/动力电池/循环寿命/衰减模型Key words
charge rate/traction battery/cycle life/attenuation model分类
航空航天引用本文复制引用
刘仕强,卜祥军,白广利,陈立铎,闫晓晓,王芳..充电倍率对高功率型磷酸铁锂动力电池循环寿命影响的研究[J].重庆理工大学学报（自然科学版）,2018,32(6):8-13,6.基金项目
国家国际科技合作专项(2016YFE0102200) （2016YFE0102200）
