Nickel strip VS Copper strip current test

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Copper conduits electricity over 4x better than nickel. Copper is better for high current batteries, but its harder to spot weld, so its not used so much on batteries.
#battery #18650 #batterypack

[@yxxx911]

There is nickel plated copper strip on sale. Have you tried this option?

[@SRNAR8]

Madness, I got a bit of a weak spot welder, was thinking of doing 0.25mm pure nickel spot welds for my battery pack as that's the max I can do, I will be using 40T cells, since you are quite experienced, would this be fine? I only plan on running 27.5A peak and 18.75A continuous per p.

[@pajajaska]

I think that 0.25mm would be fine. How wide the strip is?

[@Mickparrysstepdad]

From doing lots of reading around, use a top layer of 0.1mm nickel plated steel (the steel bit is important) with a layer 0.1mm copper sandwiched below. A slot in-between the spot welding probes helps put more power into the weld. To make sure you don't damage the battery, only do a single weld on each battery. Don't do multiple welds at the same time because it heats the battery too much.

[@nevirosensei]

So bro, what strip should I use for 32650 build in 12v 120ah? Nickel or Copper?

[@pajajaska]

If you take alot of current put of your battery copper is better, but its harder to weld than nickel.

[@roosnothanks9281]

Was the nickel strip pure nikl or nikl plated steel strip?

[@pajajaska]

It was pure nickel

[@chrismagallanes8858]

So whats better in general for a 65v to 72v battery 19650

[@pajajaska]

copper is better for high discharge batteries

[@chrismagallanes8858]

@@pajajaska good i order copper strip

[@pajajaska]

@@chrismagallanes8858 but be aware that copper is harder to weld than nickel

[@chrismagallanes8858]

@@pajajaska bruh i just received the spot welder and it had nickel strips so which if i remember correctly the copper strips is for the series and the nickel so for the parallel

[@pajajaska]

@@chrismagallanes8858 yes, for parallel connections you don't have to use copper. Series connections carry the current. What kinda battery you are building?

[@jobmariano348]

How thick is that copper and nickel

[@pajajaska]

if I remember right both are 0.2mm thick

[@yxxx911]

There is nickel plated copper strip on sale. Have you tried this option?

[@pajajaska]

I haven't tried it