Project 1

Battery pack capacity = 3500mAh = 3.5Ah

nominal voltage = 3.6V

Rated voltage = 120V

No.of cell in series = rated voltage/cell nominal voltage = 120/3.6 = 33.33

case1: 33 S

Nominal battery voltage=3.6*33=118.8V

Max battery voltage=3.6*33=138.6V

Min battery voltage=3.6*33=89.1V

case2: 34 S

Nominal battery voltage=3.6*34=122.4V

Max battery voltage=3.6*34=142.8V

Min battery voltage=3.6*34=91.8V

When compare with rated voltage, the battery voltage is greater in case 2 then case 1.

So, no.of cell in series= 34 S

1) Battery pack configuration:

2) BMS topology: (Master and slave topology)