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Welding Using Batteries. 4 it can potentially harm you so always disconnect cables at the welder and. Batteries Jumpercables DC Welder.
This temperature range makes it much better for places that have very cold environments. A 20S6P pack using the copper sandwich method of spot-welding. Batteries Jumpercables DC Welder.
But I have heard of it being done in a pinch.
2 never leave it unattended. This is going to be pretty much a link-only answer and behind a paywall at that but Digital Machinist magazine had a 2-part article last year on building a spot welder using a car battery as the source. If all you want to do is make some kind of messy spot weld one battery possibly two in series should do it. RESISTANCE MICROTIG AND LASER WELDING FOR BATTERY MANUFACTURING Resistance welding has been an established joining technology for more than 40 years and has been used in the battery industry for almost as long.