Design and Implementation for EV Battery Charger with Multiple Output System

common, there is a growing need for charging systems that can adapt to various battery configurations. Many existing chargers are limited to a single fixed output, which reduces flexibility and adds cost when supporting multiple vehicle types. This project presents the design and realization of a multi-output EV battery charger using a SEPIC (Single-Ended Primary Inductor Converter) circuit. Unlike traditional converters, this system is engineered to provide multiple stable output voltages—specifically 18V, 24V, and 36V—from a single DC input source. This allows the charger to serve different battery packs without needing separate units. The converter is driven by a PIC16F877A microcontroller, which manages pulse-width opto-isolated driver ensures safe and efficient switching. The complete circuit was simulated using MATLAB and implemented on hardware to evaluate its voltage stability, load response, and efficiency. This flexible charger design offers a cost-effective and compact solution for modern EV charging needs, supporting the shift towards cleaner transportation.