The curtailment of carbon emissions from the transportation systems has been on global agenda, making electric vehicles a preferred choice. These vehicles commonly use lithium-ion batteries for motor propulsion, as they offer high power and energy density, less maintenance, and long life cycle. However, the charging time and rise in the internal cell temperature are the two major constraints that limits the functionality of the battery. Previously, various charging regimes like constant current (CC), constant voltage (CV), and constant current-constant voltage (CC-CV) were taken under consideration; therefore, an optimal charging method is a critical need of the current scenario, which may be achieved only after deep analysis of all the constraint parameters that affects the charging process including thermal impact. This paper presents the modelling and analysis of battery charger which includes multifunctional charging regimes with various state of charge (SOC), voltage-based switching transitions.