A Modelica Based Lithium Ion Battery Model

Abstract

The initial integration of a large scale battery system in existing end products like cars is usually of experimental nature. So are the simulation models supporting its design pro-cess. In the following a comprehensive Model-ica model is introduced for the simulative de-scription of the physical behavior of lithium ion battery cells packs for relevant aspects and use cases. It is part of the Modelon Bat-tery Library, a commercial Modelica library to model battery cells and packs of various types, shape and grouping. Thermal behavior, electrical behavior and the impact of the degradation due to aging are considered as they influence each other. The model parameters to calculate the electri-cal behavior are to be derived from measure-ments; an optimization algorithm to obtain them is integrated in the package using the Optimization Library. Functions to validate the model against these measurements are included as well. As an application example the simulation of an energetic energy storage system in the model of a battery electrical vehicle is shown.