Spot Welder Circuit ??

[jijcomm]

Hi all,
I am a beginner in electronics, and I would build a simple spot welder for 18650 batteries.
Can this simple circuit do the job in a good manner.

The capacitor is charged with closed interrupter, when it's full the interrupter is opened, then it is disharged through the transformer with the second interrupter (it can be a relay or a Mosfet).

and thanks

[Cliff Matthews]

No it won't work. Transformers pass AC through induction (a collapsing and expanding field). Your source on the left is drawn as AC passing through a diode bridge rectifier to make DC. (edit) Kasyan TV's channel has a number of DIY battery spot welder video's to watch:

Yellow high-lighted battery can be an old car battery and the 555 sets the pulse width to send to the driver / output mosfets.

[FrankE]

I would start with projects with much lower energy density.

I've worked 11kV and I'm shit scared of soldering lithiums, welding and generally things that spark .

[AllTheGearNoIdea]

Interesting video Cliff Thanks for sharing.

Chris