Voltlog #198 – SUNKKO 737G Battery Spot Welding Machine Review & Teardown

Welcome to a new Voltlog, today a review video. So you know I’ve been talking about building my own spot welding machine in previous videos, that project is still active but progress is slow. In the meantime I’ve been contacted by banggood they wanted to offer something for review and I thought I’d try out a chinese spot welding machine, this way I could have something to compare with.

So I picked this model from their inventory the SUNKKO 737G, I got the 220V version for EU, if you live in a 110V country, you need to choose the appropriate model. If you’re interested checkout the links in the description below the video.

So why do we need a spot welding machine? Because it provide a safe & reliable way of connecting battery cells. Sure you could take the risk and try to solder your battery cells, I have done that in the past but I would rather avoid doing it if I can because it’s risky, the temperature of the cell will rise too much while heating it up with the soldering iron. This machine does it in the blink of an eye so the cell doesn’t get hot at all.

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