Project 1

1.Design of Battery pack configuration:

Given,

Load Rated Power Rating : 150 KW

Load rated Voltage : 120 V

Cell :

cell nominal voltage : 3.6 V

Cell Nominal capacity :3.6 Ah

number of cells in series = Load Rated Volatge/ Nominal cell voltage

Number of cells in series = 120/3.6 = 33.33

Case 1 : Rounding off to 33 (NMC)

NBV = 3.65 * 33 = 120.45 V

LBV = 4.2 * 33 = 138 .6 V

Min BV = 2.5 * 33 = 82.5 V

Case 2 : Rounding off to 34 (NMC)

NBV = 3.65 * 34 = 124.1 V

LBV = 4.2 * 34 = 142.8 V

Min BV = 2.5 * 34 = 85 V

this case we shall choose case 2.

Number of cells in parallel :

Since 3500 mAh is the NMC cell capacity ,

Number of cells in parallel * cell capacity = battery capacity

Number of cells in parallel = 1.25 / 3.6 = 0.34 = 1

Battery Configuration : 33S 1P

2. Master Slave topology MCU AFE 1 (16 cells) total 33 cells (AFE1 connected to AFE 2)

AFE 2 (17 cells) (AFE 2 connected to MCU)