Coper nickle sandwicth spotwelding

[jrclown]

Hi, I’m not sure if I’m posting in the right place, but I could use some advice. I’ve never worked with copper before and just ordered a small roll of it, and I’m not sure if it’s the right size or type.
My plan is to spot-weld nickel tabs to the copper and then weld that assembly to the battery pack. I’ve always used nickel only, but the battery I’m building now requires a lot more current than what I’m used to. From what I understand, nickel welds easily but has higher resistance, while copper handles higher current but is harder to spot-weld directly, which is why the nickel-to-copper sandwich method is often used.
I’ve read that thinner copper (around 0.1–0.2 mm) works better with hobby spot welders, but I’m not sure if what I ordered is suitable. If it’s not, I’ll still use it for practice and testing sandwich welds.
Also, any links, quick guides, or references would be greatly appreciated. I learn better hands-on, so examples or reference material would really help. I’m also looking for recommendations on the best cover sheets to buy, including thickness and sizing. This pack will need to handle roughly 100–200 amps, so any guidance for high-current builds would be helpful. It’s a large pack, and I’m not entirely sure what the final use will be yet.
Thanks in advance for any advice.

 

[jrclown]

And allso anyone have any ideas of what I could use to put under this spot with the + in the photo to be able to spot weld to that area without damage the cells or create holes or sparks and not melt or burn w.e is under it i got this pack and need to add layers to it and would like to without having to take the plate off

 

[neptronix]

This thread might be useful:
"Copper/nickel sandwich" buses for series connections

 

[scianiac]

And allso anyone have any ideas of what I could use to put under this spot with the + in the photo to be able to spot weld to that area without damage the cells or create holes or sparks and not melt or burn w.e is under it i got this pack and need to add layers to it and would like to without having to take the plate off

fishpaper is often used for such insulation in battery assembly, should work pretty well there.

 

[jrclown]

I didnt think to use the fish

fishpaper is often used for such insulation in battery assembly, should work pretty well there.

I didnt think yo use the fish under it thank you

 

[jrclown]

This thread might be useful:
"Copper/nickel sandwich" buses for series connections

This is exactly what was needed thank you very much

 

[neptronix]

Hey, pro tip..
I see you are new-ish here.

Our forum search, if you use the default google option, is really really good.
A majority of the time you will see exactly what you want on the first page of results.
.. like back when google used to be good

There's a goldmine in that thing since we have so much content here, make sure to take advantage of it

 

[jrclown]

Hey, pro tip..
I see you are new-ish here.

Our forum search, if you use the default google option, is really really good.
A majority of the time you will see exactly what you want on the first page of results.
.. like back when google used to be good

There's a goldmine in that thing since we have so much content here, make sure to take advantage of it

Ty you mean the search thing or is there something else

 

[jrclown]

Ty you mean the search thing or is there something else

Oh I see what your talking about cool that dose make it easier thank you

 

[neptronix]

Ty you mean the search thing or is there something else

I mean: