thin metal welder

[spindown]

I would like to get plans for making a thin metal welder to connect the leads of rechargeable batteries. Thanks. paul

[k7elp60]

I assume you want to spot weld tabs to NI-CAD or NI-MH batteries. I do not have a schematic, but have use them for a number of years and know how they work. They are essentially a low voltage high current AC transformer. The electrods are generally at an angle and pointed at each other. The transformer is energized for a short time(time and current are generally adjustable)The ones I have used use pressure to energized the transformer.
NEd

[spindown]

Thanks Ned for the info. What pressure is used to energize the transformer? Do you have any idea of the voltage or current requirements? Thanks Paul