This is a parametric holder / jig for spot welding cylindrical battery cells. Simply download the Fusion 360 archive and adjust the parameters as needed for your cells. I have included pre-generated STL files sized for 18650 cells in 1x2 - 5x5 arrays. They are spaced at 20.2mm with a 8mm strip channel. I would recommend printing the 1x2 model first to see how well the cells fit with your setup.

Print Settings

Printer:

VORON 2.4

Rafts:

Supports:

No

Resolution:

Infill:

40%