From Jim Wilkins@muratlanne@gmail.com to sci.engr.joining.welding,rec.crafts.metalworking on Wed Sep 6 07:29:44 2023
From Newsgroup: sci.engr.joining.welding
Does anyone have useful experience with spotwelding nickel strips to Li batteries with an AC spotwelder as the power source?
For equipment I have a Harbor Freight 240V portable spotwelder and a 240V Variac to reduce its input voltage and power, a battery spotwelding
handpiece with a switch that closes when both electrodes have been pressed against the nickel strip, and a 120/240V 40A timer I built that adjusts from 50mS to 1 or 3 Seconds.
Obviously I'll have to experiment to find a good setting, but this rig has
the power to destroy in a blinding flash if set incorrectly so I'd like to find a reasonably safe starting point. The online advice is to try a 12V car battery.