Title: Battery – Make Electronic Objects Mo bile Word Count: 484 Summary: A battery is a device that stores c hemical energy and is available in an electric form. The batteries con tain a series of electrochemical de vices that contains one or more fue l cells, galvanic cells and flow ce lls. This electric battery is an in terconnected array of one or more t han one voltaic cells that are used in the cars, in torches, laptops, digital watches and almost every el ectronic goods that we use in our d aily life. Series of battery cells The cells in the b... Keywords: Battery Article Body: A battery is a device that stores c hemical energy and is available in an electric form. The batteries con tain a series of electrochemical de vices that contains one or more fue l cells, galvanic cells and flow ce lls. This electric battery is an in terconnected array of one or more t han one voltaic cells that are used in the cars, in torches, laptops, digital watches and almost every el ectronic goods that we use in our d aily life. Series of battery cells The cells in the battery are connec ted either in parallel, in series o r in both combinations. While the p arallel combination of cells has th e same voltage power as a single ce ll, it can supply a higher current than a single cell can. The paralle l arrangements, however, suffer fro m a recurrent problem. If one cell discharges faster than its neighbor cell, then current will flow from the full cell to the empty cell, th ereby wasting a lot of power and ca using excess of overheating. Anothe r marked disadvantage is if one of the cells gets short-circuited due to an internal fault, then its neig hbor will be forced to discharge it s maximum current into the faulty c ell, thereby leading to sudden expl osion. The capacity of a battery to store charge is often expressed in ampere hours [1 A.h = 3600 coulombs]. If the battery can provide one ampere [1A] of current for completely one hour then it is said to have a real -world capacity of 1 A.h. Types of batteries There are some common battery types that are used in everyday life. Th e different types include rechargea ble and disposable batteries, homem ade cells, and traction batteries a nd flow batteries. Disposable batteries Also called primary cells are inten ded to use only once until the chem ical changed that induce electrical current supply are complete and th e battery is then discarded. They a re commonly used in smaller and por table objects with low current drai n. They are usually contained in li ght drain and heavy drain appliance s, digital cameras, watches, comput er clocks, and hearing aids. Rechargeable batteries These are secondary cells that can be recharged after they have been d rained. This is done by convenientl y applying externally supplied elec trical current that reverses the ch emical reactions that usually occur in use. It is used in appliances l ike alarm systems, vehicles, vacuum tube radio sets, absorbed glass ma ts etc. Traction batteries These batteries are designed to pro vide power to move vehicles like el ectric cars and tow motors. A pecul iar characteristic of traction batt eries is the electrolytes in the ba tteries are gelled. Flow batteries They are a special class of battery that stores additional quantities of electrolyte outside the main pow er cell of the battery and are circ ulated throughout by pumps or throu gh movement. They have a high capac ity and are specially used in the m arine appliances. So whether it’s your car, PC, lapto p cell phone or MP3 player, the bat teries are almost everywhere to mak e you electrically mobile.
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