Faster Lead-Acid Battery Simulations from Porous-Electrode Theory: II. Asymptotic Analysis
Abstract
Electrochemical and equivalent-circuit modelling 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 analyse 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 behaviour 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.
Keywords
Cite
@article{arxiv.1902.01774,
title = {Faster Lead-Acid Battery Simulations from Porous-Electrode Theory: II. Asymptotic Analysis},
author = {Valentin Sulzer and S. Jon Chapman and Colin P. Please and David A. Howey and Charles W. Monroe},
journal= {arXiv preprint arXiv:1902.01774},
year = {2020}
}
Comments
Submitted to Journal of the Electrochemical Society. Second part of a two-part paper. Part I: "Faster Lead-Acid Battery Simulations from Porous-Electrode Theory: I. Physical Model"