期刊
JOURNAL OF POWER SOURCES
卷 275, 期 -, 页码 633-643出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2014.11.066
关键词
Lithium-ion battery; LiFePO4; Reduced-order model; Simplified electrochemical multi-particle model
A simplified physics-based model is developed to predict the performance of an LiFePO4 cathode at various operating and design conditions. Newman's full-order porous-electrode model is simplified using polynomial approximations for electrolyte variables at the electrode-level while a multi-particle model featuring variable solid-state diffusivity is employed at the particle level. The computational time of this reduced-order model is decreased by almost one order of magnitude compared to the full-order model without sacrificing the accuracy of the results. The model is general and can be used to expedite the simulation of any composite electrode with active-material particles of non-uniform properties (e.g., size, contact resistance, material chemistry etc.). In a broader perspective, this model is of practical value for electric vehicle power train simulations and battery management systems. (C) 2014 Elsevier B.V. All rights reserved.
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