![]() ![]() ![]() It should be affordable for DIYers, more powerful and robust than comparable designs, and simple to use.Īnd I didn't like the fact that seemingly all spot welders would use a preset pulse length to set the weld intensity. As I am an electronics engineer with quite some experience in power electronics, I decided to develop my own welder. There are cheaper models from a Chinese company, but I decided against this option. This is accomplished by using a high current, allowing for very short pulses.Īs this is a challenging task to achieve, professional welders start at several 1000$. The molten metal should only occupy a small area to prevent damage to the battery. As the metals have an electrical resistance, this current causes the material to melt together. The working principle of these is to push electrical current through metal strip and battery tab. I faced exactly this problem, and learned that the most common method to interconnect the cells is to weld nickel or nickel-plated steel strips across them using resistance spot welders. ![]() Soldering leads to them is not an option, because the required prolonged heat at the battery tabs tends to damage the cell's inner structure. If you want to make your own battery packs from LiIon round cells, then you have to solve the problem of connecting the individual cells.
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