Use only DC ‘constant current’ charger only for initial charging of batteries.
Ensure the charger in working condition and capable of supplying requisite volt & amps required for the batteries to be charged.
Take care of polarity and connect the pos. Terminal of batteries with the pos. & nag. Terminal with neg. Of the charger, respectively.
Charging the initial current to be 5% of the rated capacity of the battery till maximum voltage achieved and specific gravity should be upto 1.260.
After batteries are fully charged, the sp. Gravity of the electrolyte of all cells to be adjusted to the services gravity i.e.1.210/1.250+ -0.005, at 27.c. the batteries to be put on charge proper mixing.
The normal failure modes of lead- Acid Batteries
|Sulphation in cells||Over discharge
Allowing a battery to stand idle
Adding acid instead of water
|Bucking of plates||Over discharge
Continued operation with battery in starved condition
Charging at high rates
Non-uniform distribution of current over the plates,
Due to repeated deep discharge
|Shedding of active materials||Normal shedding
Excessive charging rate, or overcharging
Charging sulphated plates at too high rate
Charging only a part of the plate
Deep discharge battery on normal charge.
|Container trouble||Rough handling- any storage battery to be handled as if made of glass, though the containers made with hard rubber, SAN or FRP.Heavy batteries should be dropped/dragged. This will lead Container crack/damage.|
|Explosion in cell||may cause due to open flame, electrical sparks and clogged vent Holes.|
|Bulging of container||This is be due to under curing of the container. Stacking should be Restricted to max 3 high, with hard board in between layers.|