Operation Mode Transitions in the Kinetic Battery Model

Abstract

Batteries grew into an integral part of our daily routine. To simulate their behavior a multitude of modeling approaches have evolved. The Kinetic Battery Model as one prime representative is utilized manifoldly in relevant literature due to its intuitive representation of the electrochemical processes inside the cell. However, it is largely applied to depict only the discharging phase, often either not taking into account that parameters and operational modes for charging differ or completely neglecting the charging procedure.Hence, in this work we take an extensive look at describing the different modes of operation, the re-parametrization and redistribution in the Kinetic Battery Model, which has to take place when switching the electric current direction. We outline difficulties of parametrizing every operational mode, propose a novel approach handling these problems as well as a redistribution strategy and validate it with experimental data. First results are presented for a lithium-ion cell.