Now days batteries are playing very vital role in our life. In this digital age almost every gadgets are rely on batteries. Today we will learn and know everything about batteries. Since the power storage battery invented, scientists are constantly trying to make it more efficient to store and supply electrical power, smaller in size and weight and also more cheaper.
An electric battery is a group of electrochemical cells, which are connected with each other in a series of connection as in figure 1. A single cell can not give us as much power as we required to run a electronic gadget, to do so we need this group of cells which is called a battery.
Fig. 1
Cell is a pot made of a material which should not react with electrolyte compound to be filled in it and also a bad conductor of electricity. When this filled by electrolyte compound and inserted two different kind of metal electrodes, this setup is known as a electrical cell. If we connect a voltmeter between the electrodes, we can see some reading of voltage in the voltmeter. When an electrical circuit is connected with these two electrodes, electric current starts flowing through it. The current flows due to chemical reaction between metal electored and the electrolyte.
History:
Italian physicist Alessandro Volta built and
described the first electrochemical battery in 1799.This
was a stack of copper and zinc plates, paper disks soaked with an electrolyte are placed between them. Until the invention of Dynamo as electrical power source various kind of Battery cell are invented by many scientists at that time.
Types of Batteries
There is basic two types of batteries/cell: Primary Cell & Secondary cell.
The basic difference between them is Primary cell/battery can use until it will exhausted, while secondary cell/battery can recharge whenever it will exhausted. The charge-discharge cycle is depends on its construction & technology used in it.
Now days secondary batteries are used at the most, so here we consider Secondary batteries only.
Batteries of Today's
There are various types of Secondary batteries are available according to technology and construction used to make them.
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