Project 4

How to design a battery Pack:

1) To design the battery pack of 6.49KWh capacity we can take Lithium Ion cells.

2)Now we know that we have 18 cells in series and 7 in parallel i.e.18S7P.

3) So before connecting the cells we need to do the cell balancing so the capacity of each cell is same.

4)There are two types of cell balncing i.e. Active- In this cell balancing the energy in cell withhigh energy is distributed to other cells or Passive- In this external load is connected to the cells with more energy and balanced.

5) Now we need an holder to hold the cell and protect it from the ecternl dust and also need to maintain the internal and external Pressure.

6) Then the cells need to be connected in series and parallel connection by either spot welding or Wire bonding.

7) Now we need to connect the battery management system to the battery pack i.e. the green printed circuit board.

8) Measure if the required voltage is achieved in the battery pack by connecting voltmeter to the BMS.

9) Now enclose the battery pack.