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Can I use these batteries for a pack?
- Thread starter stuxtruth
- Start date
Mmm...I don't knwo about the discharge rate, but given that the specs you list above the picture show 2.75v as the lowest tolerable voltage, and there are a number of cells with a voltage written on them lower than that, you probably wouldnt' want to use them anyway. 
stuxtruth said:
Well, what type of pack are you planning to use them in, and what sort of peak discharge rate for the whole pack? Keep the per cell discharge rate below 4.4A (I'd keep it below 3A, personally, since I have a dim view of "max" ratings on batteries for sustained use), and it'll probably be fine. Other than some of your cells being drained below minimum discharge voltage.
I wouldn't think twice about using the higher voltage ones in a battery pack that provided half an amp to a LED headlight. But it'd be hard to build a traction pack with those unless you have a lot more.
How many watts?
A 40 cell 48v pack.. 13S? There's no way to get 40 into a 48v pack evenly.
If you are doing a 13S3P 39 cell pack, you wouldn't want to exceed 13.2A (4.4A * 3P), which gets you around 600W. And I wouldn't run those cells much past about 500W *peak* if you want them to last a while. So, are you building a 350-400W bike? If yes, those cells are probably OK (still iffy, but... eh, you can make it work). If more, then, no, you can't use those cells and stay within their limits.
A 40 cell 48v pack.. 13S? There's no way to get 40 into a 48v pack evenly.
If you are doing a 13S3P 39 cell pack, you wouldn't want to exceed 13.2A (4.4A * 3P), which gets you around 600W. And I wouldn't run those cells much past about 500W *peak* if you want them to last a while. So, are you building a 350-400W bike? If yes, those cells are probably OK (still iffy, but... eh, you can make it work). If more, then, no, you can't use those cells and stay within their limits.
dogman dan
1 PW
3p would get you about 7 amps, if you discharge at no more than 1c continuous. Good for a bike that goes at most 15 mph.
This would be using the " cut all c rates in half" rule.
So you need more cells for a 20 amps controller, or better cells. 4 or 5 p IMO.
This would be using the " cut all c rates in half" rule.
So you need more cells for a 20 amps controller, or better cells. 4 or 5 p IMO.
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