Study of Temperature Effects on Lithium-ion Battery Performance with the Complex-parametered Equivalent Circuit Model

Abstract

Temperature changes are inevitable in EVs and affect battery characteristics estimation, which is necessarily considered. This paper investigates the model parameters dependence on the temperature based on the complex parameters equivalent circuit model. The ohmic resistance and charge-transfer resistance decreases as the temperature becomes higher. They both showed exponential dependences on temperature. The double layer capacitance and diffusion capacitance increased with the increased temperature. The functions of these four parameters are obtained and studied with electrochemical theories.