Physics-Based Model of a Valve-Regulated Lead-Acid Battery and an Equivalent Circuit

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Abstract

Lead (Pb)-acid batteries are a low-cost power source for applications ranging from hybrid and electric vehicles (HEVs) to large-scale energy storage. Efficient simulation, design, and management systems require the development of low order but accurate models. In this paper we develop a reduced-order Pb-acid battery model from first principles using linearization and the Ritz discretization method. The model, even with a low-order discretization, accurately predicts the voltage response to a dynamic pulse current input and outputs spatially distributed variables of interest. A dynamic averaged model is developed from the Ritz model and realized by an equivalent circuit. The circuit resistances and capacitances depend on electrochemical parameters, linking the equivalent circuit model to the underlying electrochemistry of the first principles model.

Original languageEnglish (US)
Article number041011
JournalJournal of Dynamic Systems, Measurement and Control, Transactions of the ASME
Volume135
Issue number4
DOIs
StatePublished - Jun 10 2013

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Information Systems
  • Instrumentation
  • Mechanical Engineering
  • Computer Science Applications

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