期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 166, 期 12, 页码 A2372-A2382出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0441908jes
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资金
- EPSRC Centre For Doctoral Training in Industrially Focused Mathematical Modelling [EP/L015803/1]
- Faraday Institution [EP/S003053/1]
- BBOXX
- EPSRC [EP/S003053/1] Funding Source: UKRI
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. (C) 2019 The Electrochemical Society.
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