Journal title
Journal of The Electrochemical Society
DOI
10.1149/2.0441908jes
Issue
12
Volume
166
Last updated
2024-04-23T09:23:33.36+01:00
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
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Publication type
Journal Article
Publication date
03 Jul 2019