State Analysis of Lithium-Ion Batteries Using Discharge Curves
State Analysis of Lithium-Ion Batteries Using Discharge Curves
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使用放电曲线进行锂离子电池的状态分析
DOI：
10.1149/1.3018750
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发表时间：
2008
影响因子：
3.9
通讯作者：
Tatsuo Horiba
中科院分区：
文献类型：
--
作者：
K. Honkura;H. Honbo;Y. Koishikawa;Tatsuo Horiba
为了了解锂离子电池的退化机制，必须推导并定量评估容量衰减参数。容量与放电曲线直接相关，并且可以从阴极和阳极特定放电曲线再现。使用无损状态分析准确估计锂离子电池阴极和阳极的状态。根据特定的阴极和阳极放电曲线、每个电极中可接触的活性材料的量以及阴极和阳极放电曲线之间的对齐，可以很好地再现初始状态和劣化状态的电池放电曲线。该方法用于日历寿命测试，以分别评估每个电极中活性材料量的减少和不可逆锂损失的增加。锂离子电池已在小型便携式设备（如手机、笔记本电脑、游戏机和类似电子设备）中商业化使用多年。对于此类应用，电池寿命并不是一个严重的问题。然而，锂离子电池现在正被应用于更耐用的产品，如混合动力电动汽车、电动汽车、可再生能源的临时存储系统以及传统发电厂的不间断电源。此类应用需要基于对劣化机制的理解对电池寿命进行更复杂的评估。
It is essential to derive and quantitatively evaluate the parameters of capacity fade in order to understand degradation mechanisms of lithium-ion batteries. Capacity is directly connected with the discharge curve, and it can be reproduced from cathode and anode specific discharge curves. The states of lithium-ion cell cathodes and anodes were accurately estimated using nondestructive state analysis. The cell discharge curve was well reproduced for both the initial and deteriorated states from the specific cathode and anode discharge curves, the amounts of accessible active materials in each electrode, and the alignment between cathode and anode discharge curves. This method was used in a calendar-life test to separately evaluate the decrease in the amounts of active materials in each electrode and the increase in irreversible lithium loss.Lithium-ion batteries have been commercially used for a number of years in small portable devices like cell phones, laptop computers, game machines, and similar electronic devices. For such applications, the battery lifetime is not a serious problem. However, lithium-ion batteries are now being applied to more durable products, like hybrid electric vehicles, electrical vehicles, temporary storage systems for renewable energy sources, and uninterruptible power supplies for conventional power plants. Such applications require a more sophisticated evaluation of battery lifetime based on an understanding of deterioration mechanisms.