homemade battery tab spot welder hsurfah04

This is a bunch of photos and clips of us trying to put a battery tab spot welder together from junks. Please be careful working with the capacitor and transformer in the microwave.

Category:

Science & Technology

Tags:

• battery
• tab
• welder
• spot
• MOT
• microwave
• transformer

[rroge5]

how many amps do you estimate that it takes?

[hsurfah]

your guess is better than mines.. i'm thinking 175 amps?? 1100 watt oven, 5.2 volt stepdown, not a good 10guage wrap on the secondary... better to just get an ammeter

[SthealthRaider]

how manny wraps 10 gauge u uses?

[hsurfah]

I think it's 4 wraps.

[rroge5]

why the fan?

[hsurfah]

I didn't want to touch the bare, live switch while it was on... the fan made it easy to remember that the thing was on

[horta12]

That takes way too long to weld. You can watch the entire top of the battery get red hot before the weld occurs. This should never be used on Lithium ions as they'll likely explode or die as a result. You need a capacitor or a battery bank to get the current and voltage you need to do a rapid battery tab weld. Otherwise, good video; very educational. Thanks!

[valveman12]

Nice build. Some improvements you might consider are a foot switch and a timer so the battery does not get as hot when spot welding.

[nero986]

i have some question: how many voltage out from output ? and how value capacitor using with this welder? thx.

[LLuE88]

What is the purpose of the "red" and "white" wire? Is it two differant secondaries? if so how many turns each?

regards,

[MrMaypole14]

So, where exactly is the closest hospital?

[MichaelMantion]

anyone who has ever messed around with high voltage or high amp stuff, knows how much nerves it takes. Even when you are sure you did everything correctly and being safe it still takes a lot of guts.. You got balls man.. thanks for the video.

[a380rockerfan]

hi! i have cut and rewound my MOT with thick 2 gauge speaker wire and i was wondering if keeping the shunt in (small iron bar) would affect it's current output?

Because mine is still in and i want highest current output...

[ICUC007]

I guess you must be shy or something huh? Wish you'd have talked us thru it, what you did and why, and all that good stuff , at least for dummies like me who don't have much of a clue. I do need to do a tiny bit of spot welding, and my welder broke.

I wasn't much good at it anyway.

[a380rockerfan]

that looks like a very satisfying action; pulling the wire out of the secondary!

[keiontaybrown]

Can you make video Of How u put The Wires Together?

[soverato3]

thats cool