Document Type
Article
Abstract
Modeling heat distribution in Li-ion battery packs can be challenging, especially if the battery pack is large and the cells are operated at high C-rates, which usually requires high-order physics-based mathematical models. Reduced and simplifying models can, however, be used at lower rates. This paper presents a fast novel reduced lumped model (RLM) that can be used to calculate the temperature increase during the high-current discharge of cylindrical Li-ion cells in a subscale of a battery pack. By reducing the PDE utilized to calculate the state of charge (SoC) to ODE's and solving them analytically, the reduced model can be a very reliable and fast tool for calculating the temperature distribution in battery packs. The voltage was calculated by considering the charge overpotential, the ohmic overpotential, and the activation overpotential, while the properties of the parameters are dependent on the temperature following an Arrhenius-dependency. Comparing with experimental data, the model showed a good prediction of the temperature readings showing good potential in using the model for battery packs operating at high C-rates (>2 C).
Digital Object Identifier (DOI)
Publication Info
Published in Journal of Electrochemical Society, Volume 168, 2021.
Rights
© 2021 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/ by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.
APA Citation
Coman, P. T., Darcy, E. C., Strangways, B., & White, R. E. (2021). A reduced-order lumped model for Li-ion battery packs during Operation. Journal of The Electrochemical Society, 168(10), 100525. https://doi.org/10.1149/1945-7111/ac2dcb