Study the performance of battery models for hybrid electric vehicles

This paper studies the performance of battery models for hybrid electric vehicles (HEV). Two battery models are evaluated using plug-and-play powertrain and vehicle development software, Autonomie. The base vehicle model used for testing the performance of battery models is the Prius MY04, a power-split hybrid electric vehicle model in Autonomie. The battery model in Prius MY04 is based on the Thevenin battery model. It does not consider the effects of double layer, diffusion, and coulombs coefficient. To improve battery model, this study includes battery current loss in the battery model. In addition, voltage losses on double layer effect and diffusion effect are included in the improved battery model. Simulation tests are conducted to compare simulated vehicle fuel economy with two battery models to the vehicle fuel economy test data provided by the department of energy (DOE). The simulation results show that the improved battery model has smaller fuel economy errors than the Thevenin battery model comparing with DOE published vehicle test data.