A base transceiver station site has a load of 1000W 48VDC a

A base transceiver station site has a load of 1000W (@ 48VDC) and has 3 - 200Ah (@ 10hr discharge rate) battery strings in parallel. Assume a Peukerts constant of 1.2

a) How much of a battery’s charge is discharged by a current of 0.33C in 1 hr? b) How long can the fully charged battery bank carry the BTS load to reach a %DOD of 60% ?

c) The battery bank requires charging at 0.2C. What is the total load on the generator during bulk charging? Use 50VDC as the voltage during battery charge for this calculation

Solution

(c) Dc supply = 50V

battery bank requires charging 0.2C

Q = 0.2C

V=QC

C = V/Q

C=50/0.2 = 250F