Spot welding with Lincoln SP-135T?

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I want to use my MIG welder to make very small spot welds on rechargeable battery packs. I did a couple tests on a regular alkaline battery and jerry-rigged electrodes, and it worked pretty well. See attached pictures.I am wondering what kind of material I could make some BETTER electrodes from before I do the work on the real batteries? The electrodes in the pictures are just some 14AWG solid copper wire.Any thoughts?thanksmnemonic76This is what I would like to build/make:This is my welder, and settings: BTW the wire feeder is disengaged.Here are my rigged electrodes: the tip is a .035 drilled out to fit the 14AWGAnd finally, what I would like to achieve:The tabs are nickel shim stock - Ni200/Ni201 nickel, 0.003", McMaster-Carr part number 9707K33.
Reply:Those were probably done with a capacitive discharge rather than resistance.
Reply:Yes, I know there is a big difference as far as the strength and repeatability of the welds, but a short burst from the resistance welder to the thin tabs will make a 'decent' connection without overheating the battery. I am able to hold my finger on the battery terminal immediately without getting burned. Really, I am most concerned with damaging the battery cells while constructing the packs.mnemonic76
Reply:Hard drawn copper (wire) would be the next step up and do what you are doing. Another option would be one of the stainless steel auto antennas before they started putting those spirals on there for wind. Or look for one of the maintenance radio 'whips'. They are stainless or high nickle.
Reply:Sorry if this suggestion is ridiculous, but is soldering an option?  I don't know much about batteries but I figured I'd throw it out there.Have a Jeep Cherokee?  Click Here!
Reply:Originally Posted by SkwerlySorry if this suggestion is ridiculous, but is soldering an option?  I don't know much about batteries but I figured I'd throw it out there.