Page 196 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

MODULE 8 : Battery

LESSON 57 - 61: Battery/accumulator - types, construction,

working. Battery capacity & rating, Booster

starting. IBS, Disposal of waste battery

Objectives

At the end of this lesson you shall be able to
• explain about battery, types, construction and working procedure
• explain battery capacity, rating & booster starting
• demonstrate of disposal of battery.

Introduction and types of battery C
Introduction of Battery -A battery is a device that stores chemical energy and converts it into electrical energy as
needed
Primary cells: Primary cells are those cells which are not rechargeable. Chemical reaction that occurs during
discharge is not reversible. The following types of primary cells are used

- Voltaic cell
- Carbon zinc cell
- Alkaline cell
- Mercury cell
- Silver oxide cell
- Lithium cell

Secondary cell (Lead acid battery): These cells can be recharged by supplying electric current in the reverse
direction to that of a discharged battery.
Lead acid battery: This battery is an electrochemical device for converting electrical energy into chemical energy
and vice versa. The main purpose of the battery is to store electrical energy in the form of chemical energy. It
provides supply of current for operating various electrical accessories, when the engine is not running. When the
engine is running it gets electric supply from the dynamo/alternator. It is also known as accumulator and storage
battery.

lithium-ion battery - Lithium-ion batteries are a type of rechargeable battery commonly used in consumer
electronics. High energy density, light weight and long life. Better than lead acid batteries. For this reason, hybrid
and electric vehicles are becoming increasingly common. These batteries are expensive in price. But gives good
performance and functionality.
Construction and working of Battery

The following parts are used for Construction the battery.
1 Case: Its other name is cell container. It is made of a special type of hard rubber. It has separate compartments
on the inside to keep the cells and there is a space (on the outside) to lift it. Acid does not affect it.

2 Filler Cap: Its other name is vent plug. It is fitted on top of each compartment or cell part. On removing it,
the filler hole, the plate below and the electrolyte are visible. Electrolyte is poured into the cell compartment
through this filler cap hole. The filler cap or vent plug also has a small hole through which gases come out
during charging. This hole is called blind hole or half hole or vent hole. Some filler caps have a condensing
chamber which works to convert gases into liquid form.

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