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Objective:: 3. To Observe The Changes in Specific Gravity After Charging

To learn how to measure a lead acid battery's state of charge using specific gravity and observe changes after charging, students used a hydrometer to measure the specific gravity of distilled water and the battery's electrolyte. They then charged the battery for 20 minutes and measured the electrolyte's specific gravity again to see how it increased as the battery charged.

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47 views1 page

Objective:: 3. To Observe The Changes in Specific Gravity After Charging

To learn how to measure a lead acid battery's state of charge using specific gravity and observe changes after charging, students used a hydrometer to measure the specific gravity of distilled water and the battery's electrolyte. They then charged the battery for 20 minutes and measured the electrolyte's specific gravity again to see how it increased as the battery charged.

Uploaded by

Anonymous C9ZNFkrb6
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Objective:

1. To learn how to measure specific gravity of the electrolyte inside the lead acid battery.
2. To become familiar with the charging procedure of the lead acid battery.
3. To observe the changes in specific gravity after charging.

Theory:
A battery cells specific gravity is a great way of measuring a batteries state of charge. This is because
during a discharge the specific gravity decreases linear with ampere-hours discharged. The specific gravity
also increases as the battery is recharged.

Equipment:
Lead Acid battery
Battery Charger
Connectors
Hydrometer
Distilled Water
Gloves

Procedure:
1. Take the hydrometer and know its basic principle of operation.
2. With the help of hydrometer measure the specific gravity of pure \\ater.

Specific gravity of pure wafer _____________________


3. Using the hydrometer, measure the specific gravity of the electrolyte.

Specific gravity of electrolyte ______

You will measure the specific gravity of the electrolyte after charging the battery for 20 minutes.

Charging the Lead Acid battery


1. Notice different components of lead acid battery charger. \Vhat main components you can see from
outside?

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