Challenge

Project 1 Mechanical design of battery pack

Objective -

Battery pack capacity: 18 kWh

Cell: ANR26650M1-B

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

Report

References

https://www.batteryspace.com/prod-specs/6610.pdf

Technical Specifications

Calculations

Total required Battery pack capacity is 18 kWh = 18000 wh

The individual Cell: ANR26650M1-B has

Nominal voltage = 3.3 V

Current Capacity = 2.5 Ah

So, let us assume that for 18 kwh battery pack we need supply voltage of 200 V and 90 Ah

Cell in series = rated voltage/nominal voltage

Cell in series = 200/3.3 =

60.60 =(approx) 60

Cells in parallel = total capacity of battery / cell capacity

Cell in Parallel = 18000/ (2.5*200) = 36

total number of cells = cells in parallel * cells in series =60*36= 2160

Module capacity:

The required battery pack combination is 60S36P

For this we decided to choose 5 series and 3 parallel module connection.

5S3P configuration Voltage capacity = 5*3.3 = 16.5 V

5S3P configuration Current capacity = 3*2.5 = 7.5 Ah

So, total capacity of 1 module is = 16.5 * 7.5 = 123.75 Wh

Construction

In a typical battery pack, contains

Step 1 . Check the cell voltage

Step 2. Assemble

Step 3. Choosing the right metal strips and spot welding them to cells

Step 4. Adding battery management system

Ship work like this
in your own course.