01-10-2012, 05:42 PM
The Battery
battery.ppt (Size: 1.21 MB / Downloads: 134)
Main Entry: storage battery
Function: noun
Date: 1881
: a cell or connected group of cells that converts chemical energy into electrical energy by reversible chemical reactions and that may be recharged by passing a current through it in the direction opposite to that of its discharge -- called also storage cell.
Types of Batteries
The primary battery converts chemical energy to electrical energy directly, using the chemical materials within the cell to start the action.
The secondary battery must first be charged with electrical energy before it can convert chemical energy to electrical energy.
The secondary battery is frequently called a storage battery, since it stores the energy that is supplied to it.
DRY CELL
Uses An electrolytic paste.
The electrolytic paste reacts with the electrodes to produce a negative charge on one electrode and a positive charge on the other.
The difference of potential between the two electrodes is the output voltage.
Lead Acid Battery
Electrolyte for the most part distilled (pure) water, with some sulfuric acid mixed with the water.
Electrodes must be of dissimilar metals.
An active electrolyte.
The basic primary wet cell
The metals in a cell are called the electrodes, and the chemical solution is called the electrolyte.
The electrolyte reacts oppositely with the two different electrodes
It causes one electrode to lose electrons and develop a positive charge; and it causes one other electrode to build a surplus of electrons and develop a negative charge.
The difference in potential between the two electrode charges is the cell voltage.
The Electrolyte
When charging first started, electrolysis broke down each water molecule (H2O) into two hydrogen ions (H+) and one oxygen ion (O-2).
The positive hydrogen ions attracted negative sulfate ions (SO4-2) from each electrode.
These combinations produce H2SO4, which is sulfuric acid.
Preventive Maintenance
When the top of a battery is “dirty or looks damp.
Give a battery a general cleaning, use hot water (130° F to 170° F) with a neutralizer / detergent solution.