- The capacity of the battery is measured by unit ampere hour capacity.
- Efficiency of battery is ratio between discharging and changing current.
Efficiency (ƞ) =
Ampere hour output
Amper hour input
Charging of battery :-
Battery has to be charged with DC.
(i) Charging voltage :-
Always heigher than voltage to overcome the initial resistance of the battery and the charging current to flow through the battery.
(ii) Float charging :-
Charging a fully charged battery under no load at a rate equal to its self discharging rate. This enable the battery to remain at fully charged condition. Onboard float charging done for maintaining battery voltage.
(iii) Quick charging :-
It is charging with high current for short period of time to change the battery. It is generally done if the battery has been discharge heavily.
(iv) Boost charging :-
It is partial charge of the storage battery, usually at high current rate for a short period.
(v) Trickle charging :-
It is used where the battery rarely gets discharged. It continuous keeps on replenishing discharge energy, In tickle charging equipments are not connected. During charging specified gravity of the electrolyte start going up.
- Variation of specific gravity give a good indication of state of
- Specific gravity – (1.250 to 1.280) for fully charged battery.
Leave a Comment