Project 1

Task-1:

Aim: To design Battery pack configuration and draw BMS Topology of Battery pack using given data of car roughly 150KW, 120V and 3500mAH, 3.6V Nominal NMC Chemistry cell.

Tools Used: MATLAB and AutoCAD.

Description: To design the Battery pack of the car, we have to calculate Series and parallel configuration of cells that are to be present in battery pack.

Calculation:

Given Data:

Battery pack Power = 150KW

Voltage = 120V

Capacity 3500mAh

Cell voltage = 3.6V

Current = Power/voltage = 150KW/120V = 150000/120 = 1250 amps 

For Design the battery pack of Voltage 120V and Current 1250 amps, consider no. of cells in series and parallel.

No. of cells in series = voltage / cell voltage = 120/ 3.7 =32.4 ~= 33

No. of cells in parallel= Current / cell =1250/3.5 ~=357

The battery pack consists 33 number of cells in series and 357 cells in Parallel.

The battery pack model is 33S357P

 1.Battery pack configuration: 33S357P

 2. Topology of 33S357P battery pack

We Know, to select BMS Topology is based on

Number of cells in series =33

Master Slave topology is chosen for above battery pack.

Task-2:

Aim: To Design of 3S2P battery pack configuration using MATLAB/ Simulink.

Tools Used: MATLAB/SIMULINK

Description: To design 3S2P battery pack, 3 number of cells to be connect in series and 2 Number of cells to be connect in parallel.

Blocks Used:

To design 3S2P battery pack.

1.Battery

2.Controlled Current measurement

3.Scope

4. constant

5.Bus Selector

6.power GUI

7.Display

Simulink Model: 

 

Battery :

Block Parameters:

Results:

Here SOC, current, voltage is measured for one cell. The decrease in SOC % , current ,voltage is same for all cells, due all cells initial soc% taken as 100%. With in 3600sec cell discharge or SOC% decreases to 0 % due to Discharge c-rate is 1,and Voltage is decreases to 2.227V and current -3.5 amps

Output:

 SOC%, Current, Voltage: