Spot Welding machine using old oven transformer

Spot welding Machine is an important device for making li ion Battery packs.

so I decided to make one. I got a old Transformer from a Micro wave Oven. and remove its secondary windings by cutting the copper wire.

and make a high Ampere Low Voltage secondary by 2 Turns of Thick copper wire .and connect the terminals with 2 thick Copper nail.

Make one timer circuit and connect the primary of that transformer with that.

now the welding unit is ready we can make spot welding to batteries with tin connector by pressing the nail with the welding spot and a push a switch. the timer give power to the transformer for 1 second and the spot get welded well

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