Faster lead-acid battery simulations from porous-electrode theory: Part II. Asymptotic analysis

Author: 

Sulzer, V
Chapman, J
Please, C
Howey, D
Monroe, C

Publication Date: 

3 July 2019

Journal: 

Journal of The Electrochemical Society

Last Updated: 

2020-10-30T22:18:01.037+00:00

Issue: 

12

Volume: 

166

DOI: 

10.1149/2.0441908jes

page: 

A2372-A2382

abstract: 

Electrochemical and equivalent-circuit modeling are the two most popular approaches to battery simulation, but the former is computationally expensive and the latter provides limited physical insight. A theoretical middle ground would be useful to support battery management, on-line diagnostics, and cell design. We analyze a thermodynamically consistent, isothermal porous-electrode model of a discharging lead-acid battery. Asymptotic analysis of this full model produces three reduced-order models, which relate the electrical behavior to microscopic material properties, but simulate discharge at speeds approaching an equivalent circuit. A lumped-parameter model, which neglects spatial property variations, proves accurate for C-rates below 0.1C, while a spatially resolved higher-order solution retains accuracy up to 5C. The problem of parameter estimation is addressed by fitting experimental data with the reduced-order models.

Symplectic id: 

1026595

Submitted to ORA: 

Submitted

Publication Type: 

Journal Article