The battery builders club

The CELL charged to 5v? what?

Yeah and I’m so confused

You measured directly at cell terminals?

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I assumed the output at the usb output port would be the same or lesser than the battery seeing as you can’t just poof power/voltage into existence.
So apparently it’s just some magic in the bms cause the cell itself only charged to 4.15v but then it outputs slightly over 5v. Very interesting. Would be cool if that could translate over to our larger bms systems… flip a switch to sacrifice range but get access to higher voltage and speeds… it creates almost like a brief series connection with itself

it’s called a boost converter, which every USB power bank uses

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I want one biggified

A boost converter brings up voltage and a buck converter brings it down. It works by charge pumping inductors aaaaaand @scepterr beat me to it so yeah go watch that video

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You can find many step-up or step-down converters on ebay/aliexpress. For example, you use step-down if you want to wire usb output from 10s or 12s battery on your board. It’s not magic haha
Afaik, those smaller, cheaper variants work for lower current, less than 5A.

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I want to make 1s into 12s.
I don’t care how, I didn’t ask how, it just needs to be done.

Wut? Are you sure?

Positively.

It can be done pretty easily. For off the shelf solution, you might need 2 boost modules with a large capacitance inbetween. One to go from 3.7 to 12ish, then one from 12 to 50v. Your efficiency will be less than 40%, aka 60% lost to heat. To make anything give out a useful amount of amps, your boost converter will probably be about the size of a large battery pack too.

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there’s no use in that

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So your telling me there’s a chance?

Sure there is. Room heater. And high frequency noise generator.

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you are correct sir

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wow this is such a great idea guys why don’t we all put this on our boards?

I think you’re better off just using 12 cells :joy:

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give it a go, let us know how it went

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There’s 100% chance to do it. I have 2 boost modules right now I can daisy chain to do 1s to 20s if I wanted to.