12s2p flat battery pack using 40T cells

[janpom]

I have built exactly that pack. Here’s some links:

The battery builders club

Hey guys, I plan to build my first battery pack – 12s2p Samsung 40T. I’ll have the parallel pairs welded by a friend because I don’t have a spot welder. I’ll do everything else myself though. I got 0.2/25mm nickel strip from nkon and I’d like to use it like this for both connecting the parallel pairs and for doing series connections by soldering 10AWG wire on the small surface at the top: [IMG_2078] [IMG_2080] [IMG_2079] Does that sound like a good plan? Alternatively, I could cut the 25…

The battery builders club

First 3S2P group done. Three more to go. Stats so far: wires cut: 12 pieces of insulation stripped: 24 solder joins made: 24 shorts across the solder wire that made a splendid spark: 1 [IMG_2175] [IMG_2176] Flex test: [IMG_2177] Note the middle corridor for routing the balance leads. Patent pending.

The battery builders club

More progress. Still at one spectacular spark only. [image] [image] [image] [image]