A Modeling of Lead-Acid Battery for Electric Vehicles and Simulation Utilizing C MEX S-Function in Matlab/Simulink

Abstract

Abstract Nowadays, the need for better performance of batteries as an energy source is increasing following the growth of electrical vehicles (EVs). Therefore, modeling the battery system is important to analyze how the battery is able to perform better so that further increases the EV’s performance. This study is addressed to analyze and simulate circuit modeling of lead-acid battery into a pretty complex RLC circuit, voltage source of battery itself, and a connected load with provided conditions for obtaining varying parameters which are used by the battery with a permanent initial state of charge (SoC). This circuit is simulated using C/C++ programming where it is implemented to some connected C MEX S-Function blocks in Simulink. The result of the study is proved that series circuits increase their voltage and parallel circuits increase their ampere. For satisfying the EV’s specs such as V ou t = 400 V and the capacity = 100 Ah, arranging batteries in 400 series since n = 15 produce around 13 V.