Page 230 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

Main part of battery
• Battery box: It is also known as battery container. It is made of hard rubber. The top cover that closes it
from above is also made of this hard rubber. The top cover has grooved holes into which the vent plugs are
screwed. The battery box has three, six or twelve parts in the form of separate compartments according to its
voltage. There is an empty space in each compartment at the bottom, so that the metal of the plates etc. can
fall and get deposited in it, otherwise this metal filing can also short the plates.
• Negative and positive plates: At present, 6, 12 or 24 V batteries are used in motor vehicles, which have 3,
6 or 12 cells. These cells have negative and positive plates. These plates are made of lead, which are like
square mesh. These positive plates are filled with land peroxide (PbO ), which is brown in color. The negative
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plates are filled with antimony and its color is grey. The power of a cell depends on the number and size of
plates used in it. In each cell, a group of separate negative and positive plates are made and they are stuck
together in the form of a bunch. Separators are placed between each plate, so that they do not short together.
• Separator: A separator is used to prevent the negative and positive plates of the battery from colliding with
each other and causing a short. These are made of glass fiber, glass wood and plastic etc.

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CITS : Automotive - Mechanic Diesel - Lesson 67 - 70