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Simplified Electrochemical Multi-Particle Model for LiFePO4 Cathodes in Lithium-Ion Batteries
Journal of Power Sources
  • Mehrdad Mastali Majdabadi
  • Siamak Farhad, University of Akron, main campus
  • Mohammad Farkhondeh
  • Roydon A. Fraser
  • Michael Fowler
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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.
Citation Information
Mehrdad Mastali Majdabadi, Siamak Farhad, Mohammad Farkhondeh, Roydon A. Fraser, et al.. "Simplified Electrochemical Multi-Particle Model for LiFePO4 Cathodes in Lithium-Ion Batteries" Journal of Power Sources Vol. 275 Iss. 1 (2015) p. 633 - 643
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