| 基于内阻-容量关系分析锂离子电池的老化 |
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| 引用本文： | 王彩娟,苏来锁,宋杨,张剑波.基于内阻-容量关系分析锂离子电池的老化[J].电池,2016(6):317-320. |
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| 作者姓名： | 王彩娟 苏来锁 宋杨 张剑波 |
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| 作者单位： | 1. 吴江出入境检验检验局电池产品检测实验室,江苏苏州,215000;2. 清华大学汽车工程系,汽车安全与节能国家重点实验室,北京100084;3. 清华大学汽车工程系,汽车安全与节能国家重点实验室,北京100084;北京理工大学北京电动车辆协同创新中心,北京100081 |
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| 基金项目： | 国家质检总局科技计划项目(2014IK202)，清华大学汽车安全与节能国家重点实验室开发基金(KF14041) |
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| 摘 要： | 采用正交实验法研究恒流恒压充放电工况下,恒流充电电流(i_1)、充电截止电压(U_1)、环境温度(θ)、恒压充电时间(t1)、放电截止电压(U_2)、恒流放电电流(i_2)和恒压放电时间(t2)等7种因素对锂离子电池老化速率的影响程度:i_1U_1θ≈t2U_2i_2t1。提出一种基于内阻-容量关系区分电池老化模式的方法,并利用微分容量分析(DVA)研究电池的老化机理,结合老化模式和老化速率关系,得出i_1、U_1和θ是电池老化的主因。构造可预测老化模式的三维空间(i_1,U_1,θ),利用9组实验验证了适用性。
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| 关 键 词： | 锂离子电池 老化 内阻-容量关系图 三维空间(i1 U1 θ) |
Aging analysis of Li-ion battery based on relation of resistance-capacity |
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| Abstract: | The effect degree of seven factors such as galvanostatic charging current (i1),cut-off voltage of charge (U1),environment temperature(θ),potentiostatic charging time (t1),cut-off voltage of discharge (U2),galvanostatic discharging current (i2) and potentiostatic discharging time(t2) on the aging rate of Li-ion battery was studied by using orthogonal design of experiments under galvanostatic potentiostatic (CCCV) charge-discharge protocol:i1 ＞ U1 ＞ θ ≈ t2 ＞ U2 ＞ i2 ＞ t1.A method based on the relation between resistance and capacity was proposed to study battery aging behavior.Battery aging mechanisms were studied by the method of differential voltage analysis(DVA).Battery aging mechanism was mainly affected by i1,U1 and θ.The three dimensional space (i1,U1,θ) was built to predict battery aging mode,its applicability was validated using nine independent tests. |
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| Keywords: | Li-ion battery aging diagram of resistance-capacity three dimensional space (i1 U1 θ) |
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