Experimental Validation of a Battery Dynamic Model for EV Applications

TLDR

The study introduces an improved, user‑friendly battery dynamic model. The model was experimentally validated on four battery types, parameterized from just three steady‑state discharge points, and implemented in SimPowerSystems for detailed hybrid fuel‑cell/battery EV simulations. The model’s parameters can be easily extracted from datasheets, and it accurately captures battery dynamics.

Abstract

This paper presents an improved and easy-to-use battery dynamic model. The charge and the discharge dynamics of the battery model are validated experimentally with four batteries types. An interesting feature of this model is the simplicity to extract the dynamic model parameters from batteries datasheets. Only three points on the manufacturer’s discharge curve in steady state are required to obtain the parameters. Finally, the battery model is included in the SimPowerSystems simulation software and used in a detailed simulation of an electric vehicle based on a hybrid fuel cell-battery power source. The results show that the model can accurately represent the dynamic behaviour of the battery.