Recent content by Nobuo

Hi, I just notice your proposition, but the link does not work anymore

I finally edited the construction video, a small sum for the most important parts, hope you enjoy it! k6RLA0abmF8

In laptop packs I've found always 0.3mm of pure nickel

72V can easily kill a human, the more chance the more amps you receive, with a li-ion battery you have all you need to die with. However human skin has enough resistivity to don't make this kinda happen, unless you have your hands or skin covered with an enough conductivity salts solution or...

Depends closely with your detail level construction. Cells are perfect cylinders, if you make good shapes and patterns where cells are very exactly placed, the weight will perfectly distributed if the battery have an impact for example, and is almost impossible that both insulators of two...

Neither hot glue/ melt silicone or spot welding will make an appreciable harming heat. The important thing is the capacity of the cell to spread the heat quickly so the chemicals have not an increased temperature. All the cells is covered with a metal that will spread the heat quickly over all...

Put the glued cells into the freezer (-18ºC or less) for 12h to 24h. Cover all into a semi-vacuum bag (standard plastic bag tied) to avoid a very high temperature change and humidity. Then you can very easily rip off them, even with your hands. You have only 5 minutes to do it properly, then you...

OP here also the builder :o In that case specially the battery was made first sticking and welding 15p blocks, and then sticking each other up to the final shape. As you don't have time to put 8 strips of silicone and then stick the modules (silicone would harden), you are obliged exclusively...

Very good spotted, and forgot to mention, that the cells surface make the current prefer to choose that path because its higher conductivity. When you weld layer over layer, as the surface where you are welding (nickel) is the same IR as the material you are welding to (nickel), you need...

Basically almost the same conduction capability properties. For making a perfect IR BUS and making worth of the nickel material, I continuously weld layers in the needed places and never weld more than 0.15mm.

Current sharing between cells inside a parallel group depends exclusively of their differences in voltages. In your example you use the same conductor for parallel and for serial, so in that case the current is not shared but conducted from one cell to the next serial cell. That example makes...

In an ideal situation, if the cells would be true twins and have the same heat dissipation properties, and all the BUS conductors the same IR and length, the current passing through parallel conductors would be absolute zero. In practical uses there are several variables as each cells batch...

Paralleling connections use too low current sharing, taking into account you are using new cells for the same model, you don't need even 0.15mm pure nickel. 0.1mm is more than enough for paralleling connections. You need only the right size in the main leads cathode and anode terminals...

Which current level are you using? ( 0 - 8 ) are you referring about the static electrodes or the hand probes electrodes? for the static electrodes, on the upper side there is a strength pressure knob, adjust to the harder level. for the hand probes electrodes, try to attack highly...

I think is closer as a toy than a real e-skate, I would look for further solutions