eet module 3-experiment number- 01

7/25/2019 EET Module 3-Experiment Number- 01

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INTERNAL PARTS OF LEAD ACID BATTERY

INTERNAL CONNECTION OF LEAD ACID BATTERY


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Exp. No: 01 Page No: 2

Date:

IDENTIFY THE PARTS OF LEAD ACID BATTERY

Aim: To identify different Parts of Lead Acid Battery

ate!ia"# Re$%i!e&:Lead Acid Battery ( 12v,6Ah)

T'eo!(:

Lead-acid cell,which was developed in 1859 by a French scientist called Raymond Gaston

Plante, is the first practical rechargeable cell. he lead acid battery has become one of the most

s!ccessf!l storage battery today d!e to n!mber of favorable factors li"e low cost, ease of

man!fact!re, long cycle life and high energy density.

Lead-acid batteriesstore energy !sing a reversible chemical reaction between lead plates

and dil!te s!lph!ric acid #electrolyte$.

%ead pero&ide as anode, spongy lead as cathode and dil!te s!lf!ric acid as electrolyte.

here are three basic types of lead acid battery ' starter batteries( !sed to start engines in

cars etc, deep-cycle batteries( !sed in renewable energy applications and camping etc,

and marine batteries( !sed both for starting and for deep cycle applications.

he most widely !sed high capacity rechargeable battery.

ypical lead acid battery consists of ) cells connected in series. %ead acid batteries with li*!id electrolyte !s!ally fall in to one of three classes(

1. +onventional, with filling holes and vents to permit the addition of distilled

water lost from evaporation or d!ring high rate charge or discharge.

. -aintenance' free, from which gas may escape b!t water cannot be added.

. /ealed' gelled electrolyte are !sed.

Parts of lead acid Battery

a) Container : he container is made of hard r!bber which accommodates plates, separators,

electrolyte etc. in it.

b) Plates (electrodes): he active material of positive plate #0node$ of the cell is lead pero&ide

#Pb$ and that of negative plate #cathode$ is spongy lead #Pb$. he plates are made !p of lead

grid #mesh$ plates and the spaces of the plates are pac"ed with paste of active materials. he

positive plates are so arranged that they are in between the negative plates. /o the n!mber of the

negative plates is always one greater than that of positive plates.


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c) Electrolyte : 2il!te s!lph!ric acid #2il.3/4$ is !sed as the electrolyte. s!ally the proportion

of acid and water is 1( .

d) Separators : hese are !sed to prevent electrical contact between positive and negative plates.

/eparators are placed in between the plates and the electrolyte sho!ld be able to pass thro!gh the

separators. hey are made !p of perforated r!bber, specially treated wood, cell!loid etc.

e) Cell cover: 6t is made !p of hard r!bber and is seated to cover the cell. hey prevent spitting of

acid.

f) Vent plugs :6t is provided on the cell cover so that the gases formed d!ring chemical reaction is

escaped thro!gh this. 6t is also !sed for po!ring distilled water and acid whenever necessary. he

specific gravity of the electrolyte inside the cell can be meas!red thro!gh this vent hole !sing hydro

meter.

g) Plate connector: hey are made !p of p!re lead. Positive and negative plates are welded

separately with it forming positive gro!p and negative gro!p terminals. 0n e&tension from each

connecting bar forms the terminal pole.

) Cell connector :ne cell is connected to the ne&t by a cell connector to form a battery.

!) sealing compound:6t is !sed to form an acid tight 7oint between the cover and the container.

") #ibs and mud ousehere is space provided at the bottom of the plates to collect the deposits of

the chemical reaction. his arrangement is called m!d ho!se. -!d ho!se is formed between two

ribs at the bottom of the container.

P!o)e&%!e:

1. Place the battery on a hard surface

2. Cover your hands with rubber gloves3.

Remove the vent caps and spill out the Electrolyte safely

4.

Remove the Cell Cover

. !isconnect one of the cell connector". #a$e the cell outside

%.

&dentify Plate Connector' Positive and (egative Plates and )eperator

8. Chec$ the ribs and *ud +ouse


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P!e)a%tio*#

1. Place the battery on a hard and stable surface li$e wor$bench

2. Cover your hands with rubber gloves

3. !on,t touch the electrolyte with bare hands

4.

Remove the vent caps and spill out the Electrolyte safely

.

Remove the Cell Cover with care". -se proper tools

%. !isconnect the cell connector with proper tools

Re#%"t:

Studied and identified different Parts of Lead Acid Battery

eet module 3-experiment number- 01

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