[Oeva-list] Re: used batteries

Tony McCormick tony at notebene.net
Mon Jun 13 19:18:35 PDT 2005


Though I don't need a high quantity, I do need 5 of those 28ah 
batteries, be happy to share the discount :-)

Tony McCormick
"Drive Electric, Play Bluegrass, Learn the way of the Sword"
see it all at: http://www.notebene.net 



Bryan Avery wrote:

> Yes, I think the 336V of 28Ah batteries sounds like the way to go.  
> Given the same 681 pounds in a lower voltage higher Ah pack, the range 
> should be about the same I think, but as you suggested it might 
> actually be more expensive this way given that the ~40Ah batteries 
> seem to be a bit more expensive and there would be no opportunity for 
> combining our orders for the volume discount.  As for performance, it 
> seems that peak power from the siemens system is essentially current 
> limited up to about the 336V range so all else being equal, the higher 
> voltage pack would get me the best performance possible from the drive 
> system.
>
>  
>
> I'm definitely interested in getting together for the volume pricing. 
>  With your 52 plus my 28, that gives us a total of 80 batteries for 
> the order.  If Gary wants another 20-28 for the Insight, that would 
> put us up to 100 easily.  What did they quote you for shipping?  It 
> seems that shipping through a regular freight trucking company 
> shouldn't be too bad with such a large order.  Since the bulk of the 
> order is going to be yours, we should probably just have everything 
> shipped to you and then I can drive up and haul my bunch back down to 
> Eugene myself.
>
>  
>
> That's good to know about the powercheqs.  I've already got a bunch of 
> circuit boards printed & all the components for a set of the 
> voltage-regulator circuits that Victor designed for the TS cells.  I 
> think it may just be a matter of changing the resistor values to use 
> the same circuit with the lead acid batteries.  That would probably be 
> the cheapest solution since I've already got most of the components, 
> although I'm not quite sure about how well they would interface with 
> the PFC charger (or if that's even necessary).  The Rudman regulators 
> I suppose would be the most plug-and-play solution and guaranteed to 
> do what I need.
>
>  
>
> -Bryan
>
>  
>
> -----Original Message-----
> *From:* Theoldcars at aol.com [mailto:Theoldcars at aol.com]
> *Sent:* Friday, June 10, 2005 11:05 PM
> *To:* bryan at photonlight.com
> *Subject:* Re: [Oeva-list] Re: used batteries
>
>  
>
> Hello Bryan
>
>  
>
> With 336 volts the batteries would weigh 681 pounds. The batteries 
> would cost you more than used batteries if you could find what you 
> need. New though would provide years of reliable service until you 
> find a better replacement.
>
>  
>
> The voltage you need and the weight I think makes these your best 
> option. With this even when your batteries were at 10.5 volts the 
> pack would still have 294 volts. The other thing I have noticed is the 
> 33 to 42 Ah batteries cost a lot more. Some as much as double this 28 
> Ah price. The 28 Ah battery must fit more applications which allow the 
> price drop.
>
>  
>
> If you went on the low end 240 volt pack with 20 batteries they could 
> only weigh 32.5 pounds. Not enough to get into the larger better 
> priced batteries. With the higher voltage pack you would pull less 
> Amps? With a larger Ah battery and less pack voltage you would be 
> placing a higher load on them this would be a reduction in range 
> correct? Would there really be any gain then?
>
>  
>
> Digi-Key 1-800-344-4539 and Fedco 1-800-542-9761 both carry the 28 Ah. 
> I found they will try and beat one another on pricing. I would have 
> liked a little larger Ah battery but anything bigger than the 28 Ah 
> will not fit in the existing space. I have to do a buddy pack and this 
> is the best deal I have found on this size battery. I started with 
> Digi-Key with a 52 battery order and they were willing to sell them 
> for 43.29 which is the 120 price break they show. I contacted Fedco 
> and they went to 41.45 for a 52 order. They would do 100 for 39.95 so 
> I went with them. I would be willing to order another 52 to add to 
> yours if it gets you the better prices. The only other thing to watch 
> for is shipping. Digi-Key at first was trying to charge 1500 dollars I 
> had them contact their shipping department and the price was way off.
>
>  
>
> Gary was telling me the power cheqs are not good for leveling during a 
> charge and I think he said some burned up. He said the Rudman 
> regulators would be the best way to go.
>
>  
>
> I can assure you know more about electric vehicles than I do. I just 
> happen to have a hundred hours searching for AGM batteries and their 
> prices in the 30Ah to 65Ah range.
>
>  
>
> Let me know if you would like to take advantage of the high quantity 
> pricing together. Gary might also be interested.
>
>  
>
> Don Blazer
>
>  
>
>  
>
>  
>
> In a message dated 6/10/2005 2:23:49 PM Pacific Daylight Time, 
> bryan at photonlight.com writes:
>
>     I've got one of Victor's AC systems, so 240V-336V is the
>     recommended voltage range with the higher voltage giving the best
>     performance.  336V of the Panasonic 28Ah batteries would be just
>     about right at ~650lbs.  Of course, 240V of larger capacity
>     batteries would probably be a little bit cheaper though.  With a
>     smaller pack like this, I imagine battery balancing is going to be
>     even more critical than it might otherwise be, necessitating the
>     use of Rudman regulators / powercheqs / or some other similar
>     device?  Don, where have you found the $45 price?  The best price
>     I found with my brief internet searches was $50 ea. + s/h in
>     quantity from digikey, but every other site I found had them
>     listed at around $90.  At $45, that would be $1260 + shipping
>     which is a bit more than I was hoping to pay for a "cheap
>     temporary" pack, but at this point it's almost worth that just to
>     get the car on the road finally.  And of course, at the rate
>     things have been going with the TS cell replacement this could end
>     up being a bit more than temporary, in which case I will probably
>     be happier spending the money on the brand new batteries & high
>     voltage pack than just going with used batteries that are already
>     near the end of their useful life.
>
>      
>
>     Any other thoughts, advice, or things I should consider?
>
>      
>
>     -Bryan
>
>  
>
>------------------------------------------------------------------------
>
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