in almost all 12s4p packs i see, the cells groups are touching, how is this not an issue? is the only insulation coming from the fishpaper rings? Should extra fishpaper be added between all the p groups?
You don’t need any fishpaper or insulation between those spots. They’re electrically connected. You can see the wires soldered onto the joints right over them haha
4 Likes
lol yes silly question but im asking because i had some sparking happen on a different 5p pack which was arranged the same way
Were all the groups the right way around?
Well if it sparked it was probably not arranged in the same way. 
4 Likes
yea u right. I cant remember 100%
1 Like
I add a piece of fish paper like you see ont hat pack there in between the groups anyways…why? Lol no clue, just feel better knowing electricity is going though the wires and not jumping across the nickel 
4 Likes
0.1mm plated steel. According to people smarter than I, straight nickel is too conductive for that method.
3 Likes
inch or mm?
Uhh, whatever you measure in, I usually use mm though
Going across the nickel is a lower resistance/inductance connection than going through the wires so, in theory, you can get some micro-arcing as the nickel connection points touch and come apart over and over again. Whether the low-milliohm range of resistances and tiny inductances we’re dealing with here actually have any practical effect is an entirely different matter. 
9 Likes
hello i have contact to alibaba fore battery wath are you think about this campony ?
100pcs molicel 21700 p42a fore 330 Doller pay withe paypal…
1 Like
Did you use a kweld for that? What settings? I going to try this method too, as it has gotten pretty popular on other forums. 
I’d suggest buying from an authorised reseller. I know several people who have bought from other sellers and had bad luck.
2 Likes
The poor man pays twice
7 Likes
Other forums yep. I understand some of the better builders in here would not recommend it for eskate so I’ll echo that sentiment here too. I guess this community needs more long term reports before trusting it. Fair enough.
That said if you’d like to throw their cautions to the wind…
0.2mm copper
0.1mm nickel plated steel
kWeld
Turnigy graphene panther 3S2P (two packs) getting ~1500A per weld
Positive terminal 110J
Negative terminal 120J
2 Likes
Doing a @Heathlewis Signature model build. 20s6p in a Flux AT2. It’s a ballsy build, I give him a ton of credit. Split P groups, but nothing too outlandish.
There are going to be a pair of Little FOCers in the rear, so I’m putting a 24s ENNOID up front. Spicy.
19 Likes
Doing my first 18s build and just got my BMS, a little confused by the double balance wire plugs, any tutorial or diagram to follow? Not sure where this mess of wires are supposed to go
Dang looking good - here’s to wishing I had gotten to finish the 20s8p lacroix
2 Likes