1) What is constant current charging?
Charging method in which current does not appreciably change against battery demand.Suitably for applications where a battery needs to be fully recharged in the short time.
2) What is constant Potential charging?
Charging method where constant voltage is applied and charge current is allowed to vary against battery demand.Usually the initial current is limited this being classified as modified constant potential charging.
3) How do you decide the boost charge current rate for given ampere hour rating of battery?
C/5
ie 100AH/5 = 20 Ampere
4) How do you check the battery condition?
By conducting Discharge Test
5) What are advantage of Alkaline Batteries over lead acid?
a) Considerably more life.
b) Need not deal with H2SO4 dangerous.
c) Less Maintenance.
6) Why Battery room is considered for Hazardous area classification?
Because of Hydrogen evolution.
Gas group 2 C
7) What is the float voltage for Alkaline and Lead acid Cells?
Alkaline - 1.42V
Lead Acid - 2.4V
8) What is the specific gravity values of battery cells? How to measure?
1) 1280 for fully charged lead acid cells.
2) 1260 for half charged lead acid cells.
3) 1180 for dead cell( lead acid cells).
4) 1200 for fully charged nickel cadmium cells and discharged condition same value.
Specific gravity can be measured by " Hydrometer"
9) If one battery cell is dead,How to replace that battery?
One by pass jumper is to be provided across the battery and replace it.after replacing the by pass,jumper must be removed.
10) How to get 24V using 1.5V cells?
16 number of cells are to be series connected we can get 24V.
11) What are the battery maintenance procedure?
1) Clean the battery terminals and apply petroleum jelly.
2) Check the voltage per cell.
3) Check the specific gravity of electrolyte.
4) Check the electrolyte level.
5) Check the electrolyte temperature.
6) Check the total voltage.
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