Spot welding batteries tips & trix

One of the best tutorials on spot welding . Thx a lot.

There are two things I do for perfect spot welds. First I run used electrodes across a piece of fine emery cloth. Since I am also a Tig welder it is most important that there is no burn oxidation on the electrodes or if so you get an uneven current path or poor weld. I also know that we can only spot weld with the electrodes on one side.⚠ I thought about springs under the electrodes for equal pressure. I found a much better workaround. I place the battery pack between a loose fitting wood jig to keep cells vertical. Loose enough so no binding in the jig when finger pressing on the top of the pack. Under the pack I have a small 3/8" strip of plastic foam similar to the black pads found in some equipment cases. (I don't remember what old case they came from). Do not use foam rubber or styrofoam. When I press the electrodes on the nickel strip it allows the pack to shift a tiny bit giving almost equal pressure on each electrode.👌 This gives me excellent welds under both electrodes without one with great penetration and the other almost none. 🧡. A quick scratch across cleaning strip and on to the next weld.💥

Thank you, very much. I learned that a space between the electrode must be 2~2.5mm for optimum welded joint. Appreciate your advice.

Thanks so much for this. I half-assed a few bad practice batteries to get an idea of how spot welding works. I now know some of the mistakes I was making. I didn't even know the spacing between my electrodes could be adjusted. Very helpful.

I have an older spot welder Sunkko 788H, which doesn’t have the remote handle. Due to this reason, I find it very very difficult to spot Battery Banks eg: 3S5P and so on. Your demo is prompting me to procure a handle, like yours to ease the job. Thanks again.

Very good overview of ALL the factors, with the physics! Thank You! Also good IPM (Information per minute)! I was intently listening and relating your info to my project in a Flow; EXCELLENT timing on your part! Or is that Pace...OK,just call it IPM (yes, I'm building a spot welder from my "junk box" parts, so results WILL vary.....6xIGBTs, 556, 12v 10A batt, trickle charged, )

My spot welder is collecting dust as my first experience did not go so well.  Maybe I will try again  doing the fuses on 1 pack. As usual Great Tutorial!!!

Thank you for the very informative video about spot welding with fuse wire and How spot welding works

Great tutorial. Thank you!

Hi Daniel, i would love to see how you build the cheap ass spott welder ;)

Thanks a lot for the tips and for taking the time to make this video

Yep you said it perfect. That is what I did before I started mine thanks for showing

Very good tutorial! I learned a lot from this about adjustments that I did not know I could make. I really appreciate that you made this video. Thanks

Hey thanks a lot man! Very helpful and informative. I appreciate you for saving me from starting a fire lol

Thanks a lot! Cheers from Germany

Great video but I wish you'd mentioned what THICKNESS of nickel strip you were using when you began the experimenting here at the 11 minute mark. I'm sure many viewers would feel the same.

learned what i needed to know. Thanks

Thanks a lot for detail info' on spot welding ( esp. for 18650 cells). S= space and size of the electrode. P=pulse or period of welding time. O= operating system of electrical power, eg. dc,ac.or pulsating dc. And T=temperature or Amps. used by the machine for welding the work piece . What about my thinking ?

Ahh Dar, nice to find you... I'm having problems with spot welding fuse wire onto cell (no probs with nickel to cell or nickel to nickel)... lets see if I find an answer or else I'll see you on SLS :D jes

Flying sparks can also mean that your strip is not pure nickel, but rather nickel-plated steel. This has a lot more resistance than pure nickel. It's a disadvantage for carrying current, but actually an advantage if you want to sport weld copper. Copper is too conductive to easily spot weld with a hobbyist spot welder, but if you put nickel or steel on top, copper 0.1mm in between and the cell at the bottom, the resistive metal will get hot enough to weld the copper to the cell.