磷酸铁锂动力电池工况循环性能研究

被引：41

作者：

赵淑红 ^{[1
,2
]}

吴锋 ^{[1
]}

王子冬 ^{[2
]}

机构：

[1] 北京理工大学化工与环境学院

[2] 中国北方车辆研究所国家动力电池检测基地

来源：

电子元件与材料 | 2009年 / 28卷 / 11期

关键词：

动力电池; 磷酸铁锂; 石墨; 工况循环; 容量; 内阻;

D O I：

暂无

中图分类号：

TM912 [蓄电池];

学科分类号：

0808 ;

摘要：

重点研究了不同温度、不同功率等级的工况循环条件下,磷酸铁锂动力电池容量、内阻等的变化规律,期望对建立合理的循环寿命评价测试方法有所帮助。研究结果显示:25℃、100%功率等级条件下,循环72815次,即满足相应车型行驶8.0×104km,电池容量衰减了5.6%,直流内阻增加9.6%。工况循环过程中电池正、负极嵌入–脱嵌能力均有不同程度衰减,但负极衰减更大,其SEI膜(固体电解质相界面膜)阻抗、电荷转移阻抗有显著增加。

引用

页码：43 / 47

页数：5

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