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A pseudo three-dimensional electrochemical-thermal model of a cylindrical LiFePO₄/graphite battery

Lookup NU author(s): JOEL Chiew, Professor Cheng Chin, Joe Gao, Dr Boru Jia, Chenming Zhang

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).

Abstract

This paper introduces a pseudo three-dimensional electrochemical-thermal coupled battery model for a cylindricalLithium Iron Phosphate battery. The model comprises a pseudo two-dimensional electrochemical cellmodel coupled with three-dimensional lumped thermal model. The cell is disassembled to obtain the physicaldimensions of the cell components. The thermal characteristics of the cell are studied during the dischargeprocess over a range of temperatures and discharge rates. The validity of the numerical model is demonstratedexperimentally via a 26,650 cylindrical Lithium Iron Phosphate/graphite battery cylindrical cell. Instead ofinfrared thermal images, series of regression models are utilized to quantify the thermal behavior at variousdepth of discharge under various discharge rates. The results demonstrated that the battery cell performs differentlyat a lower ambient temperature and lower discharge rate where the exothermic reactions are milder.

Publication metadata

Author(s): Chiew J, Chin CS, Toh WD, Gao ZC, Jia JB, Zhang CZ

Publication type: Article

Publication status: Published

Journal: Applied Thermal Engineering

Year: 2019

Volume: 147

Pages: 450-463

Print publication date: 25/01/2019

Online publication date: 24/10/2018

Acceptance date: 23/10/2018

Date deposited: 30/10/2018

ISSN (print): 1359-4311

ISSN (electronic): 1873-5606

Publisher: Pergamon Press

URL: https://doi.org/10.1016/j.applthermaleng.2018.10.108

DOI: 10.1016/j.applthermaleng.2018.10.108

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