Project 1

Qu1: Design a battery pack for a car roughly 150 Kw with 120 V. Use 3500 mAh 3.6V nominal NMC chemistry cell.

a.Design the battery pack configuration.

b.Draw the BMS topology for this battery pack.

Ans1:-

Motor Parameter:-

Motor rated Power Rating:-150kW=150000W

Motor Nominal Voltage:-120V

Motor Nominal Current Requirement:- I=P/V=150000/120=1250Amps

Cell Parameter:-

Nominal Capacity:-3500mAh=3.5Ah

Nominal Voltage:-3.6V

No of cell in series = Motor Nominal voltage/Cell Nominal voltage=120/3.6=33.33=34.

So for this scenario Master-Slave topology is preferred over others.

No of cell in parallel:- Motor Current requirement (A) / Cell Nominal Capacity(Ah)

= 1250 A/3.5Ah = 357.14 = 358 Nos

Battery pack Configuration will be 34S358P

Qu2: Build a 3S2P battery pack configuration with generic battery block using Matlab/Simulink

Ans2:-