日历老化对锂离子电池SEI生长的影响及其对电路模型参数的影响

Bharat Balagopal, Cong-Sheng Huang, M. Chow
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引用次数: 8

摘要

本文讨论了历法老化对SEI生长速率的影响。讨论了SEI增长的原因,以及在基于第一性原理的电池三维退化模型(3DM)中SEI增长的实现。在3年的时间里模拟了SEI的增长,并对其对电池产生的终端电压和电流的影响进行了绘制和讨论。然后将结果应用于电池的等效电路模型(ECM),以研究和确定日历老化和SEI增长对电路参数的影响。文中还讨论了内阻增大和容量减小的问题。
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Effect of calendar ageing on SEI growth and its impact on electrical circuit model parameters in Lithium ion batteries
This paper discusses the effect of calendar aging on the growth rate of SEI. It discusses the reasons for the growth of SEI and the implementation of SEI growth in the 3D First Principle Based Degradation Model (3DM) of the battery. The growth of SEI is simulated over a period of 3 years and the impact it has over the terminal voltage and current generated by the battery are plotted and discussed. The results are then applied to the Equivalent Circuit Model (ECM) of the battery to study and identify the impacts that calendar aging and SEI growth has on the parameters of the circuit. The increase in the internal resistance and the decrease in the capacity are also discussed.
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