STUDYING THERMALLY REGULATED CHARGER TO IMPROVE THE SERVICE LIFE OF RECHARGEABLE 059 LITHIUM ION BATTERIES.

Mitiku, Nega

dc.contributor.author	Mitiku, Nega
dc.date.accessioned	2017-08-04T09:21:40Z
dc.date.available	2017-08-04T09:21:40Z
dc.date.issued	2017-08-04
dc.identifier.uri	http://hdl.handle.net/123456789/7621
dc.description	A THESIS SUBMITTED TO THE SCHOOL OF GRADUATE STUDIES OF BAHIR DAR UNIVERSITY IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN PHYSICS	en_US
dc.description.abstract	Generally, batteries are classified into two groups. The primary batteries (can not take place reversible reactions) and rechargeable (secondary) batteries which can take place ) reversible reactions. Again rechargeable batteries can be grouped into SLA, iCd, NiMH, Li-ion and Li-Polymer. From these rechargeable batteries Li-ion including Li Polymer batteries can be found in practically every high performance portable prod ucts. Compared to other rechargeable batteries, Li-ion batteries have a higher cell voltage, a higher energy density, low self-discharge, very good cycle life, are environ mentally friendly, and are simple to charge and maintain. The difference between the Li-ion and Li-polymer is a solid ion conductive polymer replaces the liquid electrolyte paste to lower the internal resistance. The battery life time depends on different factors such as battery chemistry, state of charge/discharge, battery temperature and battery capacity termination level. The rcs of the battery charger control the overall fault conditions of the charger circuit. Some of these fault conditions are extreme temperatures (very low or very high), over voltage, under voltage and over current. Thermally regulated rechargeable battery chargers can help to keep the service life of the battery that is specified by the company. This research work investigates these faults of battery charger circuit and found possible adjustments so that the cycle life of the battery is improved.	en_US
dc.subject	PHYSICS	en_US
dc.title	STUDYING THERMALLY REGULATED CHARGER TO IMPROVE THE SERVICE LIFE OF RECHARGEABLE 059 LITHIUM ION BATTERIES.	en_US
dc.type	Thesis	en_US