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An equivalent circuit model of lithium-ion batteries was developed using a nonlinear resistor governed by Butler-Volmer's equation and a constant phase element, which effectively reproduced the current and transient voltage responses of real batteries.

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Abstract

An equivalent circuit model of lithium-ion batteries which has a nonlinear resistor governed by Butler-Volmer’s equation and a constant phase element was investigated. The current dependence of the real battery could be reproduced well by the contribution of the nonlinear resistor, and the transient response of voltage could be reproduced well by the contribution of the constant phase element.

Key findings

  • The nonlinear resistor governed by Butler-Volmer's equation accurately captured the current dependence of real batteries.
  • The constant phase element effectively reproduced the transient response of voltage in real batteries.
  • The proposed model demonstrated good agreement with experimental data.

Keywords

Lithium (medication)IonConstant (computer programming)Phase (matter)Thermodynamics

Identifiers

DOI
10.23919/ICPE2023-ECCEAsia54778.2023.10213775
Journal
2023 11th International Conference on Power Electronics and ECCE Asia (ICPE 2023 - ECCE Asia)
Year
2023