Battery Module: Manufacturing, Assembly and Test Process Flow. In the Previous article, we saw the first three parts of the Battery Pack Manufacturing process: Electrode Manufacturing, Cell Assembly, Cell Finishing. Article Link In this article, we will look at the Module Production part.
To build a 12V battery pack, you will need: 18650 Cells: At least three cells connected in series. Battery Management System (BMS): To protect against overcharging, over-discharging, and short circuits. Nickel Strips: For connecting the cells. Spot Welder or Soldering Iron: To secure connections.
To make the battery pack, you have to first finalize the nominal voltage and capacity of the pack. Either it will be in terms of Volt, mAh/ Ah, or Wh. You have to connect the cells in parallel to reach the desired capacity (mAh ) and connect such parallel group in series to achieve the nominal voltage (Volt ).
To build a 12V battery pack with 18650 cells, connect four cells in series (3.7V each) to achieve approximately 14.8V nominal. Use appropriate battery management systems (BMS) for safety. Ensure balanced charging and consider using protective cases for safety and longevity.
Connecting the BMS: B- Terminal: Connect to the main negative (-) terminal of the battery pack. B+ Terminal: Often already connected internally; check your BMS specifications. B1 (or B0): Connect to the most negative point (first cell's negative terminal). B2, B3, ...: Connect sequentially to the positive terminals of each cell in series.
After ensuring all your connections are secure and insulated: Cover the Battery Pack: Place the assembled battery pack inside the appropriate shrink wrap tubing. Heat Application: Use a heat gun or lighter to shrink the tubing around the battery pack. This will help secure the cells together and provide a protective outer layer.