[ausev] LiFePO4 battery system suitable for DIY EV's

[Seth Williams]

http://en.wikipedia.org/wiki/EEStor

"Production is expected to start mid 2009."

With fantastic energy density claims.  Hope this comes to fruition.

Seth.

--- On Thu, 12/11/08, JohnFM <johnfm101 at gmail.com> wrote:

> From: JohnFM <johnfm101 at gmail.com>
> Subject: Re: [ausev] LiFePO4 battery system suitable for DIY EV's
> To: "AustinEV News Announcements and General Discussion" <ausev at austinev.org>
> Date: Thursday, December 11, 2008, 9:21 AM
> Just about every LIfePO4 source for an EV conversion is
> coming by way
> of China. Free trade is great but, there is so little
> accountability
> and support from most of these Chinese companies. I've
> seen reports of
> cells melting, becoming imbalanced even with a BMS with no
> compensation. Has anybody got word on what's going on
> with EEstor and
> their supercapacitor? Surely there has to be a better way.
> 
> John
> 
> On Thu, Dec 11, 2008 at 8:42 AM, Marc Kohler
> <mkohler at austin.rr.com> wrote:
> > Hi Kevin,
> >
> > I think it's a very interesting idea, one that
> many would like to see
> > happen.
> >
> > Whose LiFePO4 modules are you planning on using as the
> basis of the pack?
> >
> > Have they provided any test data to verify claims?
> >
> > Best regards,
> >
> > Marc Kohler
> >
> >
> >
> > From: ausev-bounces at austinev.org
> [mailto:ausev-bounces at austinev.org] On
> > Behalf Of Kevin Douglass
> > Sent: Wednesday, December 10, 2008 10:05 PM
> > To: AusEV at austinev.org
> > Subject: [ausev] LiFePO4 battery system suitable for
> DIY EV's
> >
> >
> >
> > Hello to all,
> >
> > My name is Kevin Douglass.
> >
> > I'm a member of HEAA (Houston Electric Auto
> Association).
> >
> > We have a couple of EE's with experience in this
> sort of thing in the club
> > who are starting on a project to make a LiFePO4
> battery system suitable for
> > EV's.  Tentatively these modules are expected to
> be about 4.5KWhr, 75VDC,
> > 300Amps max continuous, 600Amps peak, with 22.5Kwatts
> (29 hp) continuous
> > power. Modules can be series or parallel connected
> just like commercial
> > batteries.  DC motor EV's would probably take two
> modules in series for
> > 150VDC, 9KWhr capacity (@ 250W/mi ? 36 miles).  A
> higher voltage AC system
> > could use three or four in series.  A more powerful DC
> system, or if you
> > want twice the range, could use four (150VDC, 18KWhr.)
> in series/parallel.
> > Each module will be fully enclosed and protected; yet
> individual cells can
> > be easily replaced.  Full BMS will be built-in, with
> remote SOC/SOH
> > display.  The system may also have a built-in battery
> charger and possibly a
> > DC-DC converter (for 12V battery) depending on what
> everyone agrees on.
> >
> > This is a big project expected to take most of 2009. 
> The predicted price of
> > the modules is currently $6,000 but subject to change
> as things are further
> > defined.  Our desire is to be less expensive than
> other LiFePO4 systems
> > available to DIY EV builders, but of high commercial
> quality with safety as
> > first priority.  To participate in the project, a
> contract, NDA, and earnest
> > money will be required.  There will be a schedule for
> payments throughout
> > the year as major milestones are accomplished.
> >
> > Is there interest in this from members of the Austin
> EV list in particular
> > but not limited to those that are close to the Houston
> area.  The cells are
> > being bought in quantity and building more modules
> lowers the cost of cells
> > and the proportional costs of getting the electronics
> made.
> >
> > Please contact me at 713-927-6997 or 
> k.douglass at earthlink.net
> >
> > Thank you,
> >
> > Kevin Douglass
> >
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> > 9:30 AM
> >
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> >
> >
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