I am starting my first battery build, and I ordered the 30Q´s already and a good old kWeld (thanks to the community)
And I wanted to ask you guys, which nickel strips and if I should get them with the holes so that the weld will stick more reliable? Like in the picture
There is still a thing I don’t understand, why is the current between the parallel packs so small, shouldn’t it be the same everywhere in the pack?
Also for a 12s5p pack, with samsung 30q cells (so around 75a continuous) a single 10awg wire should be enough for the series connections, right?
Because the cells are in parallel, they share the load. Means 80A on a 4p is 20A for each cell for example.
One 10AWG is enough for most our packs.
Depending on the pack layout it can make sense to use 2x14AWG or 2x12AWG.
I wouldn’t recommend nickel as serial connection on a flat pack. There will always be a bit of flex, even on a stiff deck, which can cause the welds to break and pop the nickel off. Better use silicon wire.
I would say you good with one stripe 8-10mm 0.15 nickle for the parallel connection.
Don´t forget that you weld them to the terminals which add some material as well.
Also if you use 2x12 AWG for example as series connection and solder one between cell 1-2 and second between 3-4 this will add some more copper and solder on top of the nickel which add up.
I only ordered 2m of 10awg wire, so unless I wind 12awg wire in my local hardware store I will just use 2 10awg, so it’s not really a necessity but I just don’t have any 12 awg wire.
You have kweld, .20mm works well. Either way you don’t need the slits with kweld.
And IMO I’d rather have 27mm of solid nickel, more conductor more angry pixies. But minor difference if it’s not carrying series current. Beware the difference in height for doublestack vs staggerstack.
Hmm I remember from when I was shopping, it’s hard to find ladder strips that are not plated steel?
is that nkon? Lol there was a fiery thread about nkon strips being not nickel recently (I think it’s all positively resolved).