Static and dynamic analysis of Li-polymer battery using thermal electrochemical model

A dynamic model of a micro cell for Li-polymer battery based on the thermal electrochemical principle is developed to analyze static and dynamic performances. The micro cell model is one dimensional and coupled with two-dimensional macro cell thermal model to construct a pouch type battery. Firstly, the model is used to analyze both static and dynamic performances that include overpotentials, current distribution, potential distribution, and concentration of ions through the plane. Based on concentrations, the state of charge (SOC) and efficiency at charging and discharging cycles are calculated. In addition, effects of step current and voltage responses on terminal current, voltage and temperature distribution are analyzed. Finally, charging performance at a constant current and constant voltage is simulated and analyzed.