Bridging physics-based and equivalent circuit models for lithium-ion batteries
Artikel i vetenskaplig tidskrift, 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

Författare

Zeyang Geng

Chalmers, Elektroteknik, Elkraftteknik, Elmaskiner och kraftelektronik

Siyang Wang

Umeå universitet

Matthew Lacey

Scania CV AB

D. Brandell

Uppsala universitet

Torbjörn Thiringer

Chalmers, Elektroteknik, Elkraftteknik, Elmaskiner och kraftelektronik

Electrochimica Acta

0013-4686 (ISSN)

Vol. 372 137829

Ämneskategorier

Havs- och vattendragsteknik

Annan fysik

Annan elektroteknik och elektronik

DOI

10.1016/j.electacta.2021.137829

Mer information

Senast uppdaterat

2021-03-03