Скачать или смотреть DIY Spot Welder, Success! Lithium Battery Cell Tabs

Finally, a working spot welder! This DIY project has taken a long time to work the bugs out, but here it is. I'm using a contactor for 240 volt appliances. Also a 12 volt battery that I made in a previous video, a timer, tungsten tips. and a microwave transformer.

In this final video about the spot welder I go back to using 120 volt power instead of the 240 volts. I also exchange the SSR for a contactor (relay). This 30 amp contactor is usually found in large appliances like furnaces and air conditioners.

I work through timing to get the best weld on the batteries without over-heating them. I found the negative tab (copper) worked well with one long pulse at 0.65 seconds. The positive tab (aluminum) worked with a double pulse, each 0.35 seconds long.

Timer Board: https://amzn.to/2L7nPqm

Contactor: https://amzn.to/2Ecd2FD

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