A lithium-ion battery simulator based on a diffusion and switching overpotential hybrid model for dynamic discharging behavior and runtime predictions

Lan-Rong Dung*, Hsiang Fu Yuan, Jieh Hwang Yen, Chien Hua She, Ming Han Lee

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

A new battery simulator based on a hybrid model is proposed in this paper for dynamic discharging behavior and runtime predictions in existing electronic simulation environments, e.g., PSIM, so it can help power circuit designers to develop and optimize their battery-powered electronic systems. The hybrid battery model combines a diffusion model and a switching overpotential model, which automatically switches overpotential resistance mode or overpotential voltage mode to accurately describe the voltage difference between battery electro-motive force (EMF) and terminal voltage. Therefore, this simulator can simply run in an electronic simulation software with less computational efforts and estimate battery performances by further considering nonlinear capacity effects. A linear extrapolation technique is adopted for extracting model parameters from constant current discharging tests, so the EMF hysteresis problem is avoided. For model validation, experiments and simulations inMATLAB and PSIM environments are conducted with six different profiles, including constant loads, an interrupted load, increasing and decreasing loads and a varying load. The results confirm the usefulness and accuracy of the proposed simulator. The behavior and runtime prediction errors can be as low as 3.1% and 1.2%, respectively.

Original languageEnglish
Article number51
JournalEnergies
Volume9
Issue number1
DOIs
StatePublished - 1 Jan 2016

Keywords

  • Battery simulator
  • Diffusion model
  • Equivalent circuit model (ECM)
  • Linear extrapolation
  • Overpotential
  • Rate capacity effect
  • Recovery effect

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