Question

What is the name of the following device? Explain its principle and working.

Answer 1

1. This device is a battery hydrometer.
2. Car batteries are heavy and mysterious items when it comes to their operations.
3. The battery either works or fails altogether at some point in time.
4. Understanding how a battery functions and steps to check it are great ways to familiarise our self with this changing technology.
5. These tools can give you more information than just trial and error during charging and discharging.

Principle :- A battery hydrometer is used to test the state of charge of a battery cell. This is performed by measuring the density of the electrolyte, which is accomplished by measuring the specific gravity of the electrolyte. The greater the concentration of sulphuric acid, the more dense the electrolyte becomes.

Working :-

1. Carefully insert the battery hydrometer into the cell. Press on the bulb that acts as a syringe. You should see fluid filling the hydrometer.
2. Continue to squeeze the bulb until the battery electrolyte solution fills the device to the maximum level.
3. This device tests each cell by measuring the specific gravity of the fluid.
4. This value tells you if the cell is properly working or on its last legs.
5. Batteries need all six cells in good working order to operate at peak levels.
6. With a full bulb of battery electrolyte fluid, read the measured value on the device. Write this value down.
7. Continue onto the next cell. It’s important to take a reading of every cell at the same time before you perform any calculations.
8. The electrolyte temperature plays a role in determining the overall battery life.
9. When you’re measuring the specific gravity, and you read $1.250$as the value, it only retains this number if the temperature is at $80degreesFahrenheit.$For every $10-degree$difference, add or subtract $0.004.$
10. The battery life results use the adjusted numbers as follows, including:
11. Between $1.274and1.239is100-to75-percentcharged$
    Between $1.238to1.201is74-to25-percentcharged$
    $Valuesunder1.200indicateadischargedcell$.