Project 1 Mechanical design of battery pack

Que. 1) Battery pack capacity: 18 kWh

Cell: ANR26650M1-B

Prepare a detailed battery pack drawing along with its enclosure. State your assumptions.

Cell: ANR26650M1-B

Data sheet:

Application:

Mechanical Design Process:

Required energy capacity of battery pack: 18KWh

Cell datasheet

Cell used : ANR26650M1B

Cell Voltage= 3.3V

Cell Capacity= 2.5Ah

Cell Weight=76 g

Cell Diameter= 26 mm

Cell Height = 65 mm

Cost Of Each Cell=6.55 $

Mechanical Design:

Assume Voltage of battery pack=400v

We know,

P=VI

Pack Capacity=Energy Capacity/Pack Voltage

Pack Capacity=(18*10^3)/400

= 45Ah

No. Of cell in series = pack voltage/cell voltage

= 400/3.3

= 121.21….apro ….122 cell

Number of cell in parallel= pack capacity/cell capacity

=45/2.5=18 cells

Number of cell in battery pack= 122*18=2196 cells

Weight of battery packs=(2196*76)/1000=167 Kg

Length of battery pack= no. of cell in series*cell diameter

=122*0.026=3.172 m

Width of battery pack= no. of cell in parallel*cell diameter

=18*0.026=0.468 m

Area Of Battery= Length*Width

3.172*0.468=1.4845 m^2

Volume of battery=Area of battery pack* cell height

=1.4845*0.065=96.5 litres

Specific Energy Dencity= Pack Energy Capacity/Weight of battery pack

(18*10^3)/167=107.76 Wh/Kg

Volumetric Energy Density= Pack Energy Capacity/volume of battery pack

(18*10^3)/96.5=186.53 Wh/L

Cost Of Battery Pack= total number of cell in battery pack* cost of each cell

=2196*6.55=14383.8 $=1045544.76 Rs