Spiral Cell batteries 
Friday, October 20, 2006, 12:13 PM
Exide Orbital XCD
12v 50AH, 41 lbs, 10.17 x 7.00 x 8.12H, 2.5 milliohms, Peukerts <1.05
600Kw each

Optima Yellow Top:
model D34/78, 12v 55AH, 43 lbs, 10 x 6.8 x 7.8H.

Optima 31 12v 75 AH, 60 lbs, 12-13/16 x 6-1/2 x 9-3/8H. Both are 2.5 milliohms, Peukerts 1.05,

4 x Exide Orbitals:
124lbs, 2.4kwH (48v x 50Ah)
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Prius battery details 
Friday, October 20, 2006, 11:52 AM
The prius pack I'm looking at is made up of 38 modules, each consisting of 6 1.2v cells. Right.
Here's the skinny. Each module weighs 1.04Kg.
38 modules x 1.04Kg = 39.52Kg.
39.52Kg = 87.13lbs

So, 88lbs, flexible configuration, 273.6 volts, 6.5Ah.
That's 1.788Kwh

The downside: They get hot during charging and require BMS.
The upside: I'm building a motorcycle. Plenty of airflow avaliable.
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prius battery... maybe 
Thursday, October 19, 2006, 07:13 PM
I'm still considering the prius battery.
Apparently they get pretty warm as they charge - so warm that toyota put alot of effort into air cooling and such. I'm leaning towards using a B600 nicad. They're pretty cheap surplus and have a good rep. The problem? Each cell is 1.2v, and I'd want 48v at least. I've found them for $10 each online. $400 in surplus nicads... or $300 for prius batteries. I'm leaning towards the prius cells unless I find a good deal on the nicads.
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Thursday, October 19, 2006, 12:35 AM
Well, I lost out on the motor I'd hoped to score on ebay. It went from $40 to $340 in 3 seconds.

But I did manage to find a prius battery pack. I might just have them in hand in a week or two. The batteries are the biggest stumbling block for the project, and the NiMH cells would be perfect.
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Hybrid? oh yeah. 
Tuesday, October 17, 2006, 08:42 PM
I was catching up with a friend in Colorado, and he offered up a 50cc snowblower motor when I was pondering making the bike a hybrid.

So the bike will actually have a hybrid drivetrain. It might not end up ideal - I think 100cc would be better, but 50cc to play with will give me the chance to do something really different.
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