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How do you calculate battery

SERIES CONNECTION OF BATTERY


             E=e.m.f of one cell, volt
             n=Number of cell.
             r=Internal resistance of one cell, ohms

            Total e.m.f (ET)= n*E, volt
            Total internal resistance (RT) = n*r ,ohms
            Total current (I)= nE/nr+R , ampere

PARALLEL CONNECTION OF BATTERY




            E=e.m.f of one cell, volt
            n=Number of cell.
            r=Internal resistance of one cell, ohms

            Total e.m.f (ET)=E , volt
            Total internal resistance (RT)=r/n ,ohms
            Total current (I)=nE/r+nR

CAPACITY OF A BATTERY
 
Capacity =Ampere * Hours .

SOME OTHER IMPORTANT TOPIC OF BATTERY

Battery is series connection 
            1)e.m.f increase.
            2)Ampere is constant.

Battery is parallel connection
            1)e.m.f constant.
            2)Ampere is increase.

THE CAPACITY TYPES OF A BATTERY

Two types of battery capacity 
            1)Ampere hour efficiency .
            2)Watt hour efficiency.

1)AMPERE HOUR EFFICIENCY 

            Discharging ampere hour /Charging ampere hour × 100


# Lead acid cell = 90%  to 95%.

2)WATT HOUR EFFICIENCY

            Discharging watt hour/Charging watt hour × 100.

# Lead acid cell = 80%  to 85%.





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