DESIGN AND DEVELOPMENT OF AUTOMATIC BATTERY CHARGER WITH CONTROLLER FOR BATTERY CHARGING STATION

Alberto A. Java, Ramon A. Alguidano, Jr., Caesar Rico S. Acanto, Ruben M. Armadillo & Vitini Edhard O. Idemne

Abstract

The study aimed to design and construct a locally-made battery charge-controller for the Battery Charging Station (BCS) project implemented by Central Philippine University-Affiliated Non-conventional Energy Center (CPU-ANEC). The battery charge controller was design only to protect battery from over charging. The functionality of the charge-controller was tested using a solar panel and a battery. The charging current was controlled by the PWM circuit. During charging, the output of the PWM circuit was set to approximately ninety percent (10%) duty cycle and approximately ninety percent (90%) duty cycle for trickle charging. The output waveform and the duty cycle of the PWM circuit were checked using the oscilloscope. The testing of the charge-controller was done for four days of continuous operation to ensure the reliability of the system. Based on the test results, when the duty cycle was ten percent (10 %), the green LED lighted-up and the ammeter indicated maximum charging current, while for a ninety percent (90 %) duty cycle, yellow LED lighted-up with the ammeter indicating minimum current. The red LED lighted-up when the polarity of the battery was reversed, while the orange LED lighted-up only when the battery state of charge was empty. These test results show that the charge-controller worked as expected and meet the required design parameters and is ready for use.