DIY Battery spot welder

thingiverse

This is a DIY project of a spot welder for batteries. It uses a LCD dual pulse controler https://es.aliexpress.com/item/33017416673.html?spm=a2g0s.9042311.0.0.7dc663c0t9aotM The idea was to do it as close as a commercial one. I used a power suppy case, a microwave transformer and fan, a 9v 1A transformer and used a 25mm2 terminal blick to attach the copper electrodes to the 25mm2 cable that is used on the transformer secondary.