The battery builders club

so I’m planning on building a pack with a bunch of salvaged cells, but they are measuring mostly 2.5-3V. I know this is really low, but can I bring the voltage back up manually with these thingies:


and then build the packs when the voltage is back to a safe range (3.7ish)? Are there any risks involved with this method?

Or, alternatively, I was wondering If I could build p-groups with cells that are close in voltage, but have the p-groups themselves differing quite a bit in voltage, and then charge the p-groups? So for example, say i build a p-group with cells all around 2.6V, and then another group with cells around 2.85-2.9V, and then charge the whole p-groups up to be around 3.7V?

Not sure what the best route is here with salvaged cells, so lemme know what you think. I ordered some o those liitokala’s back in April from China so they ought to be getting here any day now.

Please be careful with salvaged cells though, I would say mix them so all parallel groups have equal capacitance and resistance

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I’ll measure later today

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What did you search for? I can add those keywords

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Rate my setup :joy:

Shrink wrap on the unit for zap resistance, shrink wrap on the pens for grip, 5.5x2.1 barrel for the foot pedal

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seems fine honestly, I’ll prolly do the same withe the shrink wrap

smart, that thing already came out on me once

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idk i forgot but it’s probably fine, it was a long list so i didn’t look at all the posts

are you the guy that asked for an enclosure?

Yup, there’s nothing wrong with the shrink wrap but it bothers me still

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If you have a female port, I sent you an extra male end so you could do it too :yum:

At least I think I did…

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There. I did it.

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Damn, those probe wires are beef

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12s6p P42A in the making

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I have been thinking about this a lot recently and have started a thread on the topic here Production EV Battery Thread (SERIOUS)

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I just worked with some of these sensor cables on haggy motors and AVX drives on the century I built. The problem with a panel mounted setup is the angle of said panel. If I had mounted these as designed they would’ve stuck straight into the motor cans rather than following the curve of the deck.
They look nice. But the space they need to fit in and the fixed, short length of the cable come from the motor made them a little annoying

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Does anyone know why one of the electrodes keeps sticking on my malectrics spotwelder while I’m spot welding?

Mighty be dirty, give the tip a little love and try again (high grit sandpaper or steel wool or something like that)

I rub the grunge off on the wood surface I’m working on. I used to use a file to gently knock off the schmeg, but wore my electrodes down to a nub. Good luck

where are all the P42A’s coming from? Did I miss a GB or sale or something?? my hoarder senses are like WTF :eyes: :eyes:

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idk maybe peoplz paid full price, they got them on nkon

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