Project 1 Mechanical design of battery pack

Project Title: Mechanical design of battery pack.

Aim: Battery pack capacity: 18 kWh

Cell: ANR26650M1-B

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

Software Used: Siemens NX, MS Word.

Solution:

Battery pack capacity: 18 kWh

Cell: ANR26650M1-B

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

ANR26650M1-B cell specifications:

ANR26650M1-B cell and battery pack images:

Calculations:

Battery Pack C: 18 kWh.

Nominal Voltage (Vn) = 3.3 V.

Nominal Cell Capacity (Cn) = 2.5 Ah.

Nominal Cell Capacity in Wh = Vn*Cn = 3.3*2.5 = 8.25 Wh.

Batteries connected in series produce more voltage whereas battery connected in parallel produce more current.

Voltage of battery pack = Nominal Voltage of the cell * no. of cells connected in series,

Considering 100 cells connected in series,

Voltage of a battery pack = 3.3*100 = 330 V.

Capacity in 100 cells connected in series = 100 * 8.25 = 825 Wh.

Modules of 100 cells in connected in series to be connected in parallel to attain 18 kWh battery capacity = 18000/825 = 21.82 ≅ 22.

Considering C-rate = 1.

Current of battery pack = C-rate*Cn*Number of cells in parallel = 1*2.5*22 = 55 A.

ANR26650M1-B cells connected in 100S 22P configuration will give a capacity of 18 kWh with voltage of 330 V and current of 55 A.

Design of Battery Pack using Siemens NX:

ANR26650M1-B cell:

Cell Dimensions and Weight:

ANR26650M1-B Battery Pack (100S 22P) (2200 cells) Configuration:

Minimum Battery Pack Dimensions:

Length:

Length = 2596 mm = 2.596 m.

Width:

Width = 571.12 mm = 0.571 m.

Battery Pack Weight:

Battery Pack Weight = 167.42 Kg.