The battery builders club

The cell cavity is only 8 cells wide so the only easy efficient options are 12s2p and 6s4p in there

I think you can do a 9s3p 18650 though

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…

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It’s not meant to be a powerful board I guess

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and yet

someone wants 13s

the universe is increasingly queer

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i dunno the science… but that board seems specced out at a 10s3p 30q battery which is probably purrfect with a 12s daly shorted to 10s…

but i’m the k00k…

@yelnats8j has a 12s5p 30Q by using both compartments for cells only, the ESC is top mounted and the BMS is external

Lol that would still have the lonely cell group

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apparently we’ve both embraced the lonely P group and the unfortunate deck design…

Honestly if I had to do it again it wouldn’t be that bad, I just don’t want to use that large of a BMS ever again

It’s a perfect 12s2p 21700 pack though, I have a Unity and dual 6354 motors running of a 12s2p P42A which I think will be perfect

Maybe a dual 4.12 and 5055 motors would be good too

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this would go all the way back to rule #1
get the deck and enclosure of your build firstest

ok… we’ve solved all that…

as unusual as it appears… your quality shine thru… you build a good pack brother

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I mean it does fit… There enough room for a 12s3p 18650 and dual esc still

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:slight_smile::slight_smile::slight_smile:

You’re too nice, also why didn’t the blush face work?

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Molicel’s current ratings are for non-continuous use like power tools, electric vacuum cleaners, and some EV’s. That’s not a problem but we can’t use those numbers for directly comparing Molicels to any others.

My ratings are true continuous ratings and can be used for comparing cells. My ratings also take into account voltage sag and loss of deliverable Wh/Ah. That is, I don’t allow excessive voltag sag. This typically only seen on the ultra-high capacity cells, above 3000mAh for 18650’s and above 4500mAh for 21700’s.

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no seriously
this is battery club… you build damned safe, quality batteries… the n00bs looking on this thread should emulate the gUUd shit you and others post here…

i’m gunna have to pst sum pix of my crap here again…

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If I’m setting my vesc to stop at 90 battery amps… two layers of nickel would suffice. .2mm 10mm wide.

Input. I want to be lazy. Thinking of putting a thermistor next to the nickel and doing some load tests. I think 2 layers will suffice,. The second kayer starting at the third or fourth cell in parallel to save nickel.
.

For science. What can I get away with.

3 layers would surely work perfectly

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The geometry makes a big difference, the layout will greatly affect the current distribution

Moving the connection from the end to the middle cuts the max current in half

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I’m aware .

But going for speed

And all wires/ balance to come out one end.

Maybe I’m not optimally laying these out… r I’ve been known to have brain farts

Btw that stuff is ideally 20A per strip

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How are you doing series connections? If you have the 1:1 series connections you are fine, if it’s the ends that bottle neck do this


(10awg stripped and soldered down the entire length)

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