Capacitive Discharge Battery Tab Spot Welder

Things are coming together on my latest project, a capactive discharge spot welder intended to be used for welding battery tabs. I will be creating a project page shortly to document the entire process but wanted to put something up tonight as I have made some significant progress on the project tonight. Here is a quick look at how the device is coming together.


The device is basically comprised of  (2) .75 Farad Capacitors, a 24V DC Power supply,  a large SCR, a foot pedal and a set of electrodes. All of the components are currently cased in a repurposed power tool carrying case. Some preliminary proof of concept welds have been completed but some tweeking is still necessary.

Check the project page soon for a full write up.



Let's see those test welds!