Nickel strip thickness variation with different discharging rates

Hello everyone, I have been building my own Li-ion battery packs from past 6 months and was using 0.15mm thick nickel strip as my discharge current was hardly 17amps. But now I want to build a battery with 35amps discharging current so I had double spot welded my two nickel strips of 0.15 mm. So basically now I am getting 0.3mm thickness. But now I am stuck with the question will that nickel strip be suitable for such high discharging current ?
Kindly guide me.

You should also wonder if your tab welder is sufficient enough to weld on 0.3mm.

How many parallel strings do you have in your battery pack?

This is one option

"Copper/nickel sandwich" buses for series connections
https://endless-sphere.com/forums/viewtopic.php?f=14&t=108006