电极
电池(电)
电压
荷电状态
锂离子电池
稳健性(进化)
材料科学
离子
计算机科学
健康状况
分析化学(期刊)
控制理论(社会学)
电气工程
化学
热力学
物理
工程类
控制(管理)
人工智能
物理化学
功率(物理)
有机化学
生物化学
基因
色谱法
作者
Karrick Mergo Mbeya,Nicolas Damay,Guy Friedrich,Christophe Forgez,Maxime Juston
标识
DOI:10.1016/j.matcom.2020.02.013
摘要
In this paper, we propose a non-invasive method to determine the electrode balancing of the lithium-ion batteries, which is the determination of (i) individual electrodes capacities and (ii) individual curves of equilibrium potentials of the electrodes as functions of the battery state of charge. The proposed method requires the average measurements of the battery voltage between discharge and charge for a low current. This averaged voltage is then associated with the reference average curves of the electrode equilibrium potentials issued from literature. To determine the electrode balancing, the method was first used on a pristine LiFePO4/graphite cell. The results are consistent with this cell data and the proposed method accuracy is compared to a reference method of the literature. We then used the proposed method on an aged cell of the same type to evaluate the method robustness with respect to the change in the cell state of health. The tracking of each electrode capacity during the battery lifespan can be used as a non-invasive diagnosis tool to monitor the state of health evolution to each electrode. Furthermore, the access to the individual curves of electrodes equilibrium potentials as functions of the battery state of charge is the first step towards the implementation of a non-invasive tool for an optimal prediction of the battery operating limits during fast recharging.
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