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OT: Battery choices

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william.p.dube(at)noaa.go
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Posted: Tue Mar 07, 2006 6:10 pm Post subject: OT: Battery choices

I crammed 26 of these into the battery pack. This works out to just over 

200 HP. I ran these "off the shelf" type batteries for one season when I 

couldn't get really high performance batteries. It was the heaviest 

battery pack I have put on the bike at 300 lbs.



I don't quite draw them down to six volts. It's more like 7 volts.They 

sometimes melt the straps and split open if you draw much more than 850 

amps, so you can't quite draw them down to the ideal 1/2 open-circuit 

voltage.



I just got a new sponsor, so I'm about to put a new pack in the bike. It 

should weigh about 135 lbs and put out 350 HP or more. Hopefully these 

batteries will arrive in a few weeks. I'm keeping my fingers crossed.



Bill Dube'



Hopperdhh(at)aol.com wrote:



 	  Quote: 	
		  



 

Bill,

 

Wow!  But 850 amps at about 6 volts (at 746 watts per horsepower) only  comes 

out to 6.8 horsepower per battery.  How many are you using?  10?  20?  Or, is 

it a closely guarded secret?

 

So far, so good with Odyssey and PM starter.  I'm amazed at its  cranking 

power.  Have had one whump, but that was quite a while ago.

 

Dan Hopper

RV-7A 200 hp Flying 144 hrs.

 

 

In a message dated 3/7/2006 6:53:53 P.M. Eastern Standard Time,  

william.p.dube(at)noaa.gov writes:



I have  pulled over 850 amps out of these on my electric drag  bike.

http://www.killacycle.com



Bill  Dube'

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rv8(at)lazy8.net
Guest

Posted: Wed Mar 08, 2006 6:22 am Post subject: OT: Battery choices

Bill Dube wrote:



 	  Quote: 	
		  



I crammed 26 of these into the battery pack. This works out to just over 

200 HP. I ran these "off the shelf" type batteries for one season when I 

couldn't get really high performance batteries. It was the heaviest 

battery pack I have put on the bike at 300 lbs.



I don't quite draw them down to six volts. It's more like 7 volts.They 

sometimes melt the straps and split open if you draw much more than 850 

amps, so you can't quite draw them down to the ideal 1/2 open-circuit 

voltage.



I just got a new sponsor, so I'm about to put a new pack in the bike. It 

should weigh about 135 lbs and put out 350 HP or more. Hopefully these 

batteries will arrive in a few weeks. I'm keeping my fingers crossed.



Bill Dube'



Hopperdhh(at)aol.com wrote:

  



Bill, gonna give these a try??
	




A123Systems is working with Department of Energy to develop 

next-generation materials for Hybrid Electric Vehicles.  Our commercial 

products enable a *significant cost and weight savings* vs. NiMH or 

conventional Li-Ion technology for hybrid vehicles.



*Furthermore, our batteries are especially suited for plug-in electric 

drive systems. Unique features include:*



Twice the energy density of other Li-Ion HEV cells, While having the 

highest power to weight ratio of any commercially available battery 

(100C pulse capability). 



The lowest impedance of any cell/packs in its class



Low impedance growth even at very high charge/discharge rates



Outstanding calendar life



Novel design that withstands extreme shocks and vibration



Excellent performance over a wide temperature range (-30 to 60 degrees C)



Intrinsically safe chemistry (especially important in large batteries)



We have several customers designing high voltage electric drive products 

around our technology and we can supply a high volume, high quality and 

very competitively priced cells or packs manufactured at our Asian 

production facilities.



John

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