Guys you should consider nickel plated copper instead if you can. Good welding ability and better conductivity thus less losses in resistance. Better discharges, less heat, more range. Personally I use pure copper.
Can you spot weld pure copper?
I am planning on using 0.15mm nickel strips, with tinned copper braid soldered on top across all the serial connections
0.15mm x 7mm pure nickel strips are only good to about 5-6A before they start heating up significantly
I’m fairly certain you cannot spot weld pure copper strips without a special spot welder.
You cannot spot weld pure copper easily but nickel plated copper you can as easy as nickel!
If I find back spinningmagnets thread I’ll bring it here to provide you more details. He’s very happy with nickel played copper strips.
I have 7mm if that works for you?
Anyone have any of this type of nickel strip that they’ve tested for authenticity? There are a few USA sellers, but I am wary of all the listings. You never know unless you test it yourself…
@jmasta I’ve got a bunch of that stuff from various places but none of them were pure. Those are actually made to be used with holders like these
Thanks. Yeah I was planning on using the holders actually to make a pack that is 6 wide x 2 tall. But it would be annoying to wait 3 weeks for the strips to come in, only to find out it is actually nickel-plated steel
Yo~ forget what I wrote up there. Nickel plated copper strips I’ve seen where DIY made with anode. It rocks but unavailable currently. Cheers
How many nickel strips 0.25x7mm would you need for a 12s4p made of Samsung 30Q for full current flow?
I have only one on each of my 4P packs and my board runs amazing! I wonder if the strips run too hot and the maximum power is decreased by a low efficiency
you can use copper with this and the tool isn’t too hard to make or you can buy it for maybe 3 or 4 times the cost of the spot welder. copper strip kills nickel
Damn, I’m bummed because I ordered some of those. these? https://www.amazon.com/gp/product/B01K9PKVK4
Yep those are them
Totally put together half a 10s2p pack with them before I realized. Lame. At least its amazon so they’ll be free
They might work
Got my 5 meter roll from ebay. It seems to be legit nickel, hasn’t rusted in the salt water solution(I put in a small piece to test). I will report back as well when my alibaba 1 kg roll comes. Heres the one i ordered off ebay:
The amazon kalastar strips listed above are nickel plated steel for sure though. They are even rusting already in areas where i touched them with my fingers.
I am a little worried though, because i ordered 0.20 thickness on my alibaba order. The sunkko welder is making pretty good welds with the 0.15, but i think 0.20 may be too thick. I’ll report back and let you all know how that works out too.
I have the 709A, with the wedding pen .010" is the thickest I have been able to use @ 8Pulse when welding across the nickel strip, 6P when welding across the can to nickel strip. .015 with the arms is the best I could do, however, using a small hole punch and placing a hole in the center of each pole, contacting the can and nickel strip should allow a thicker nickel strip to be used when using the pen. The pulse needs to travel from each tip through the can, not through the nickel. This will give a better weld at the tip contacting the nickel. The thinner the material, the greater the surface area needed, nothing can beat the current capacity of Ni Sheet…https://www.knifemaking.com/category-s/415.htm
This stuff is 99.96% @ 100mm wide, you just have to cut 25mm strips off the roll: http://www.ebay.ca/itm/171512042275?ul_noapp=true
Direct source: http://www.nealloys.com/nickel_200_201_205_270.php
EDIT I found this in a forgotten folder in my PC:
@RootedSuperuser Sorry there is no link because I recycled from industrial machines and house parts.
Alternative you can use is copper wires, size it accordingly to your individual cell’s max wanted discharge and you obtain Tesla-style individual cell fuses.