A Simplified Electrochemical Model of Lithium-ion Battery Considering Liquid Overpotential

Xinhua Gao, Xiaojie Li*, Facheng Wang, Yuquan Wen, Huina Mu, Xiaojian Yi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

This paper proposes a simplified electrochemical model for lithium-ion batteries considering liquid phase overpotential (LOP2D). It has great significance for the analysis and prediction of dynamic battery characteristics, battery status evaluation, battery management etc. Based on the porous electrode theory and concentrated solution theory, the diffusion and migration of lithium ions are considered. Moreover, the finite difference method is used to solve the process of solid-phase lithium-ion diffusion. Finally, this paper compares terminal voltage change with time between the simplified electrochemical model and P2D model under different current density. The results show that the LOP2D model provides a more straightforward mathematical expression with fewer computational terms and higher computational accuracy, which is of great value in practical applications such as battery SOC estimation, ageing analysis, overcharge and over-discharge control, and thermal analysis.

Original languageEnglish
Title of host publicationProceedings of 2021 IEEE International Conference on Sensing, Diagnostics, Prognostics, and Control, SDPC 2021
EditorsXuyun Fu, Shengcai Deng, Diego Cabrera, Yongjian Zhang, Zhiqiang Pu
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages275-281
Number of pages7
ISBN (Electronic)9781665449762
DOIs
Publication statusPublished - 2021
Event2021 IEEE International Conference on Sensing, Diagnostics, Prognostics, and Control, SDPC 2021 - Weihai, China
Duration: 13 Aug 202115 Aug 2021

Publication series

NameProceedings of 2021 IEEE International Conference on Sensing, Diagnostics, Prognostics, and Control, SDPC 2021

Conference

Conference2021 IEEE International Conference on Sensing, Diagnostics, Prognostics, and Control, SDPC 2021
Country/TerritoryChina
CityWeihai
Period13/08/2115/08/21

Keywords

  • LOP2D
  • Liquid phase overpotential
  • Model reduction
  • P2D
  • lithium ion battery

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