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Today's Topics:

   1. Re: DC/DC with flexible pack voltage? (Zeke Yewdall)
   2. Re: Size of LiFePO4 cells (Chuck Homic)
   3. Re: EV Progress (gottdi)
   4. Re: Size of LiFePO4 cells (Jeff Shanab)
   5. Tesla Jobs (Jeff Shanab)


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Message: 1
Date: Sun, 13 Jan 2008 10:47:20 -0700
From: "Zeke Yewdall" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] DC/DC with flexible pack voltage?
To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu>
Message-ID:
        <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1

Hmmm.   Only thing is to find one thats a voltage source instead of
current source.  Most of the ones I know of are current sources, which
doesn't do much good unless you already have an AC voltage source.

On Jan 13, 2008 10:36 AM, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> You might look at inverters intended for use with wind turbines...by their 
> nature they would have to handle variable voltage inputs....
>
>
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>



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Message: 2
Date: Sun, 13 Jan 2008 13:12:55 -0500
From: Chuck Homic <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Size of LiFePO4 cells
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Jeff Shanab wrote:
> Yes Valence is available and has a great product for certain targets,
> but I don't need or want to pay for an 100ah pack. So I would go with
> the 65Ah 19.2V modules
> I want to have a 300V system so that is 15 or 16 of them
> Last I hear they were $1900 (anyone know if that has changed?) so that
> is $30,000
>   
Prices of valence modules as of 12/26/07:

12.8V @ 40Ah = $860 = $1.68/whr
12.8V @ 100Ah = $2030 = $1.59/whr
12.8V @ 130Ah = $2550 = $1.53/whr
19.2V @ 65Ah = $1935 = $1.55/whr

BMS module is $135.

Still more than 3x what I want to pay.




------------------------------

Message: 3
Date: Sun, 13 Jan 2008 10:18:56 -0800 (PST)
From: gottdi <[EMAIL PROTECTED]>
Subject: Re: [EVDL] EV Progress
To: ev@lists.sjsu.edu
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=us-ascii


I have more images up. I installed my motor for a test fit. i also have a
couple extra motors and welcome any ideas on what to do with them. One idea
was to have a custom plate built so I could install both motors and attach
them via a cog belt. My idea was maybe a motor cycle or go-cart if custom
end plates could be used. I also had a thought of maybe re-winding these to
accept high voltage and to create high power but in a short package for
those small cars. Maybe a new shaft and windings would do the trick. They
have built in fans. This may be a project for Jim. : )

Two new sections for my site are ""Test Fit" an "Play Toys"

http://inertext.homeunix.com/electricghia Electric Ghia Photo Album 

Got Ideas? Post them up. Be reasonable and realistic. The motors are 8" X
10" without the gear box stuff.

Thanks
Pete  : )

-- 
View this message in context: 
http://www.nabble.com/EV-Progress-tp14777001s25542p14789027.html
Sent from the Electric Vehicle Discussion List mailing list archive at 
Nabble.com.



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Message: 4
Date: Sun, 13 Jan 2008 10:24:53 -0800
From: Jeff Shanab <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Size of LiFePO4 cells
To: ev@lists.sjsu.edu
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1

Yes I am open to share details. But I am not gonna waste too too much
time on it while the details are in flux.

I have been considering 2 busbars with 12 cells tab welded to them and a
circuit board.
Each of these submodules can be connected in varying configurations from
3s4P to 6s2P and a master control board.

The problem there is 144 cells doesn't quite fit the group 24 size, I
need to compromise or the consumer needs to accept a different size module.

I am starting on the micro controller circuit and software and looking
at the larger 42120 cells.




------------------------------

Message: 5
Date: Sun, 13 Jan 2008 10:37:11 -0800
From: Jeff Shanab <[EMAIL PROTECTED]>
Subject: [EVDL] Tesla Jobs
To: ev@lists.sjsu.edu
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1

On the plus side, there are 39 job openings!



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End of EV Digest, Vol 6, Issue 42
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