Design of a Lead Acid Battery Charger System

Abstract

With the lack of centralized power grids, lead acid batteries have taken the place of one of the main energy sources available in developing countries. With this in mind, our objective was to design a cheap, versatile and efficient lead acid car battery charger which will interest and appeal to the “cost-minded” customer. Lead-acid batteries are finding considerable use as both primary and backup power sources. For complete battery utilization, the charger circuit must charge the battery to full capacity, while minimizing over-charging for extended battery life. In our circuit we have used a voltage regulator and comparator to regulate the voltage supply to the battery for effective charging. Four LED’s are used to indicate the status of battery charge. This circuit was simulates using a simulation software called Multisim, a product of National Instruments.