Simple 3S1P battery pack for 21700 cells
The purpose of this battery was to make a simple and small 3S battery which helps when testing components, such as electric motors. Before building a bigger battery pack dedicated to the project. The 3D models were developed in Onshape.
Building
It is important to not solder directly on the battery packs since the heat can damage the cells. Therefore the wires was soldered first to the nickel strips and then spot welded to the cells.