Comparative Analysis and Validation of Basic Battery Models for Electric Vehicles Applications

The developments in the implementation and utilization of batteries in the electric vehicles has gained significance in the recent years. These energy storage devices find an essential role in the electric vehicles owing to its cost-effective and ecofriendly issues. The batteries chosen for the electric vehicle applications must be optimum, such that they are reliable in performance by delivering the desired efficiency with a minimum cost expenditure. To achieve the optimum performance, accurate battery model designs are essential. Numerous model designs haven been proposed to meet the requirements of the optimum design criteria. The battery storage system is a preferable choice for energy storage management and finds an extensive application in power system measurements. This study compares the two basic preliminary model designs of electric batteries to meet the initial requirements in the battery selection process. The two models considered for the study are the Modified Shepherd's model and the Internal Resistance model. The study compares the performance and validates the two models based on the experimental results using statistical error analysis techniques. The various parameters involved in the models are estimated and an empirical relation is deduced for each of them.