The rapid growth in electric vehicle (EV) adoption driven by environmental concerns demands reliable, efficient, and widely accessible charging infrastructure. Faster charging solutions are essential to support this transition, making DC fast charging stations a promising technology. This study develops a comprehensive MATLAB/Simulink model to evaluate the charging characteristics of EVs using a DC fast charging system. The system model includes a three-phase AC supply, an AC/DC converter, a buck DC/DC converter, and advanced control algorithms for effective battery charging. The simulation is performed in accordance with DC Level-3 charging standards, exploring various design approaches for both AC/DC and DC/DC conversion stages. Simulation results show that the EV battery follows a Constant Current (CC) charging profile when the State of Charge (SOC) is below 80%, and transitions to a Constant Voltage (CV) mode once the SOC surpasses 80%. This transition prevents overcharging, thereby enhancing battery lifespan. The findings offer valuable insight into the integration of DC fast charging systems within modern power networks, highlighting their crucial role in improving charging efficiency and accelerating large-scale EV adoption.