Numerical modeling of coupled electrochemical and transport processes in lead-acid batteries

W. B. Gu, Chao-yang Wang, B. Y. Liaw

Research output: Contribution to journalArticle

114 Citations (Scopus)

Abstract

A numerical model is developed to predict transient behaviors of electric vehicle lead-acid batteries during discharge and charge processes. The model not only accounts for coupled processes of electrochemical kinetics and mass transport occurring in a battery cell, but also considers free convection resulting from density variations due to acid stratification. A single set of conservation equations valid for both porous electrodes and the free electrolyte region is derived and numerically solved using a computational fluid dynamics technique. This numerical methodology is capable of simulating a two-dimensional cell with the fluid flow taken into consideration and requires only tens of minutes of central processing unit time on engineering workstations. Four sample calculations are presented in this work to provide rigorous validation of the developed simulator. The simulator is capable of predicting the transient behavior of the acid concentration, the porosity of the electrodes, and the state of charge of the battery during discharge, rest, and charge cycles. The model can also be used to investigate the effects of various system parameters, such as electrode dimensions, separator design, temperature, and electrolyte composition on the battery performance (voltage, power, cold cranking amperage, etc.).

Original languageEnglish (US)
Pages (from-to)2053-2061
Number of pages9
JournalJournal of the Electrochemical Society
Volume144
Issue number6
DOIs
StatePublished - Jan 1 1997

Fingerprint

Lead acid batteries
Electrolytes
Electrodes
Simulators
Acids
Computer workstations
Electric vehicles
Separators
Natural convection
Program processors
Flow of fluids
Numerical models
Conservation
Computational fluid dynamics
Mass transfer
Porosity
Kinetics
Electric potential
Chemical analysis
Temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

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abstract = "A numerical model is developed to predict transient behaviors of electric vehicle lead-acid batteries during discharge and charge processes. The model not only accounts for coupled processes of electrochemical kinetics and mass transport occurring in a battery cell, but also considers free convection resulting from density variations due to acid stratification. A single set of conservation equations valid for both porous electrodes and the free electrolyte region is derived and numerically solved using a computational fluid dynamics technique. This numerical methodology is capable of simulating a two-dimensional cell with the fluid flow taken into consideration and requires only tens of minutes of central processing unit time on engineering workstations. Four sample calculations are presented in this work to provide rigorous validation of the developed simulator. The simulator is capable of predicting the transient behavior of the acid concentration, the porosity of the electrodes, and the state of charge of the battery during discharge, rest, and charge cycles. The model can also be used to investigate the effects of various system parameters, such as electrode dimensions, separator design, temperature, and electrolyte composition on the battery performance (voltage, power, cold cranking amperage, etc.).",
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Numerical modeling of coupled electrochemical and transport processes in lead-acid batteries. / Gu, W. B.; Wang, Chao-yang; Liaw, B. Y.

In: Journal of the Electrochemical Society, Vol. 144, No. 6, 01.01.1997, p. 2053-2061.

Research output: Contribution to journalArticle

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