期刊
JOURNAL OF APPLIED ELECTROCHEMISTRY
卷 42, 期 4, 页码 189-199出版社
SPRINGER
DOI: 10.1007/s10800-012-0394-4
关键词
Battery model; Analytical solution; Concentration distribution; Separation of variables method
资金
- National Science Foundation [CBET-0828002, CBET-1008692, CBET-1004929]
- United States government, McDonnell Academy Global Energy and Environment Partnership (MAGEEP) at Washington University in St. Louis
In this article, the method of separation of variables (SOV), as illustrated by Subramanian and White (J Power Sources 96:385, 2001), is applied to determine the concentration variations at any point within a three region simplified lithium-ion cell sandwich, undergoing constant current discharge. The primary objective is to obtain an analytical solution that accounts for transient diffusion inside the cell sandwich. The present work involves the application of the SOV method to each region (cathode, separator, and anode) of the lithium-ion cell. This approach can be used as the basis for developing analytical solutions for battery models of greater complexity. This is illustrated here for a case in which non-linear diffusion is considered, but will be extended to full-order nonlinear pseudo-2D models in later work. The analytical expressions are derived in terms of the relevant system parameters. The system considered for this study has LiCoO2-LiC6 battery chemistry.
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