DESIGN AND IMPLEMENTATION OF LITHIUM ION BATTERY CHARGER

Abstract

Although most modern electrical equipment receives power directly from the wall socket, there are number of equipment that requires electrical power from storage batteries for effective performance and convenience. Lithium battery stores electricity from the national grid for later use and can be recharged conveniently when its energy has been drained. There are many electrical appliances that use this type of battery. This paper deals with the design and implementation of an alternating current (AC) to direct current (DC) to charge a lithium ion battery. A self-oscillation fly back switch mode power supply (SMPS) topology was adopted. The circuit components and other design materials were chosen based on simplicity and availability within the locality. The green light emitting diode (LED) is ON when charging is completed. MULTISIM software was used in design before implementation procedure. The construction was first done on the separate breadboard later transferred to the Vero-board. The components were soldered one after the other on their positions. Continuity tests were also conducted to ensure that the joints were properly done. Performance analysis was later carried out and found working applicably.