Ok, I’m making a 10s 3p. My strips is 0.12mm thick and 8mm wide. I have 30 Molicel 2600mah 35a. Once I connect everything. It should be 7800mah 105a. Now how many strips I need for this layout(this is a flat battery layout)? I want to make sure it doesn’t catch on fire down the road.
Alright, a couple things:
Using a nickel strip like shown in either of these photos
is not a good idea. Even with a very stiff deck, the battery can flex enough to cause the nickel strip to fail, either at the bend (in the case of the upper photo) or at the welds (in the case of the lower one).
Using nickel strip for series connections like this if generally fine for brick-style batteries where flexion is nonexistant, but for flat batteries it’s not a good idea at all.
You should use flexible, high-strand-count copper wire for all series connections, including the ones in the middle there where you show nickel in this photo.
As for current ratings and ampacity, here’s a bunch of info.
Check the Battery Builders’ Club thread for more tips and tricks, and pictures of batteries built using these best-practice methods.
That .12x8mm can safely conduct about 8A, as everything is attached right now the pack can safely do about 8A total.
So I suggest you A: solder the packs together using silicone insulated stranded copper cable and understand you can pull a max of 10 battery amps, or B: you could deconstruct, replace thin nickel strips with large cut .2mm nickel sheet that can safely and coolly conduct more current.
I hate to pile on top of everything else you’re being told but the Molicel P26A will perform terribly at 35A and you will shorten its overall life (its “cycle life”) a lot running them that hard.
An occasional burst to 35A (each) won’t speed up the aging of those cells too much but you need some serious, very serious, connections for each cell and the pack to handle even bursts at current levels that high. You’ll get a lot of voltage sag too.
If you were only referring to theoretical ratings, and were not going to use them anywhere near that hard, then…umm…never mind.