Bridging physics-based and equivalent circuit models for lithium-ion batteries
Journal article, 2021

In this article, a novel implementation of a widely used pseudo-two-dimensional (P2D) model for lithium-ion battery simulation is presented with a transmission line circuit structure. This implementation represents an interplay between physical and equivalent circuit models. The discharge processes of an LiNi0.33Mn0.33Co0.33O2-graphite lithium-ion battery under different currents are simulated, and it is seen the results from the circuit model agree well with the results obtained from a physical simulation carried out in COMSOL Multiphysics, including both terminal voltage and concentration distributions. Finally we demonstrated how the circuit model can contribute to the understanding of the cell electrochemistry, exemplified by an analysis of the overpotential contributions by various processes.

Pseudo-two-dimensional model

Overpotential

Lithium-ion battery

Transmission line model

Author

Zeyang Geng

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Siyang Wang

Umeå University

Matthew Lacey

Scania CV AB

D. Brandell

Uppsala University

Torbjörn Thiringer

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Electrochimica Acta

0013-4686 (ISSN)

Vol. 372 137829

Subject Categories

Ocean and River Engineering

Other Physics Topics

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1016/j.electacta.2021.137829

More information

Latest update

3/3/2021 1