Willow said:where did you get nickel plated copper?
spinningmagnets said:Part of the reason that Tesla added an individual cell-fuse to their design was because it allowed them to remove some of the standard internal safety features in order to slightly increase the Amp-hour volume of the active material.
Another reason is that some of their cars are likely to be in a crash, which is unlike a powerwall that is stationary. An ebike battery might also be involved in a crash, but it is a much smaller pack and a battery fire resulting from an ebike crash is unlikely to be fatal.
I am interested in the 0.20mm thick copper bus with nickel plating, would it spot-weld easily?
kdog said:If you can get your cell position precision to a high standard, then you could buy this pre- made and use some shears to cut to required shape. Damn! That would be very cool!
protoham said:I just got pricing from Sunstone for this welder, I was really considering buying one > Sit Down ........... Over $24,000.00.
protoham said:So what would happen if you put a hole in the copper so that one probe goes directly to the battery and the other probe on the copper tab...
spinningmagnets said:Looks like he is successfully spot-welding 0.20mm thick copper to 18650's. There is no split down the center. The odd thing is that he is making a sandwich (at 08:40) with copper touching the cell, and 0.20 nickel over top of it, then he applies the spot-weld.
The first part of the video he demonstrates spot-welding 0.15mm, 0.20mm, and 0.30mm nickel.
https://youtu.be/4dZTGAcFmtA?t=649
[youtube]4dZTGAcFmtA[/youtube]
SirLongAss said:Nickel has a much high melting point then copper. So the molten nickel probably just punches threw it and cools when it hits the nickel battery tap. Effectively bolting the copper in place.