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arXiv · 1902.01774

Faster Lead-Acid Battery Simulations from Porous-Electrode Theory: II. Asymptotic Analysis

Valentin Sulzer·S. Jon Chapman·Colin P. Please·David A. Howey·Charles W. Monroe
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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.

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Valentin Sulzer, S. Jon Chapman, Colin P. Please, David A. Howey, Charles W. Monroe. 2019-02-05. Faster Lead-Acid Battery Simulations from Porous-Electrode Theory: II. Asymptotic Analysis. https://doi.org/10.1149/2.0441908jes

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