Challenge

Project 1

PROJECT 1

AIM:- 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.

In this project we have to design a battery pack for a car . The battery pack Design requirements are

as follows.

We need to design this battery pack from a combination of 3.6V and 3500mAh Cells.

First we will determine the number of cells in series for the battery pack to achieve a 120V

Nominal voltage.

We know.

Number of cells in series = Nominal voltage of battery pack / Indidual cell voltage

Number of cells in series = 120V / 3.6V

Number of cells in series = 33.33

Here we will choose the round off to 34

Now , the number of cells in parallel required for the battery pack to achieve a 50Ah current

can be given as.

Number of cells in parallel = Battery pack Capacity / Indidual cell capacity.

Number of cells in parallel = 1250Ah / 3.5Ah

Number of cells in parallel = 357

We will choose the round off to 35

Here we have to connect 34 cells in series and 357 in parallel to achieve the required battery pack

rating, but this battery pack will become too large, for that we will make the battery pack with 21

battery pack modules as shown below.

Each module is of 17S17P Arrangement as .

The whole battery pack arrangement comprises of 2 x 21 modules as shown below.

This battery pack ia of Medium power 150Kw so, we will use Master slave Topology for the battery pack.

The master slave BMS topology for this battery is shown below.

AIM:- Build a 3S2P battery pack configuration with generic battery block using Matlab/Simulink.

The 3S2P battery configuration reffers to 3 cells in series and 2 cells in parallel this

battery pack contains 3x2 = 6 cells.

Here we will build a simulink model for 3S2P battery pack using a generic battery block of 3.7 voltage

6.5 A current and 100% SOC .

The simulink model is shown below.

Here we are using a load as 100mohm resistance.

The battery pack voltage and current drawn is as.

Also the indidual cell voltage, current and SOC is shown below.

Kindly find the attachment Simulink model file .mdl.

Ship work like this
in your own course.