A novel thermal model for HEV/EV battery modeling based on CFD calculation

Battery thermal management for high power applications such as electrical/hybrid vehicles is crucial. Modeling is an indispensible tool to help engineers design better battery cooling systems. An accurate battery thermal model using Foster network is proposed. The parameters in the Foster network including capacitance and resistance are extracted from Computational Fluid Dynamics (CFD) results. The Foster network model is then shown to provide identical results as those from CFD under any transient power inputs. The model can be readily coupled with battery electrical circuit model to form a complete battery system circuit model capable of predicting accurate battery temperature and the impact of temperature on battery electrical transient performance.