[EVDL] Circuit racing and continuous duty

Hi Tom,

> I'm wondering how suitable the available EV technology is for circuit
> racing?

It has been over one hundred years since an electric car last won a
sanctioned close circuit road race against ICE competition but the Electric
Imp is getting close to breaking the gas car dominance. We have a couple of
second place finishes to our credit.

> Is there anything other than the A123 Systems offering that can take a 20
> minute discharge with regular high current regen and discharge spikes?

We are running 100 amp-hr Kokam HP batteries. http://www.kokamamerica.com/
These are amazing large format lithium polymer cells. They are rated for 500
amps continuous, 800 amps peak. They are rated to recharge at 200 amps I.E.
in about half an hour if you can find a big enough charging source. We are
regenning at 300 amps without problem and hope to go higher as we build
experience with the system.

For road racing, capacity is the key. On the road, the car uses about 250
W-hrs per mile. On the track, we use about 1,250 W-hrs per mile. With our 35
kW-hr pack, we can drive around 180 miles on the road but must turn down our
power to finish a 35 mile race.

<Would an AC system
> with both a water cooled motor and controller be more appropriate?
> Obviously
> regen would help keep the battery pack size down.

Running all wheel drive and AC motors is designed to allow us to make full
use of regenerative braking. We have a 'Regen' pedal in place of the clutch
pedal. It gives the car controllable progressive regen. We need even more
stopping power on the track, so left foot controls regen and the right foot
blends in some friction braking. Range gains are track and driving style
depended but range improvement is from between 7% to 20% with 15% being
about average.

There is a ton of technical information on our website www.ProEV.com and we
are always willing to answer questions. Basically the EV technology is
getting to the point that we can race with gas cars. It is not cheap and it
is not 'plug and play'. There is a lot to learn and it is an exciting
challenge. But we will be winning races soon.

Cliff
www.ProEV.com





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I believe Bill Dube ( correct me if I am wrong Bill) ran BEV 4wheelers in the Pike's Peak hillclimb. Maybe it was
somebody else?
It's pretty short, shorter than an oval or road-race, but measured in minutes, not seconds like the drags.
John

lyle sloan wrote:
> Please dont forget about the FIA alternative energies
> cup.
>
> Here is a vid link of last years races in Italy (vid
> is in Italian).
> http://electricmotornews.lulop.com/player.php/7134/01
>
>
>
> --- Tom Parker wrote:
>
>>

ProEV wrote:
>>>> I'm wondering how suitable the available EV
>> technology is for circuit
>>>> racing?

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Click to expand...

John,

Were you thinking of Tim Eckert in 2002, then Jeri Unser in 2003 using LG
Chem Lithium Polymer cells? Here's a link.

http://www.megawattmotorworks.com/display.asp?dismode=article&artid=36

1999 seems to be a Honda effort:
http://corporate.honda.com/press/article.aspx?id=277

----- Original Message -----
From: "john fisher" <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Sent: Friday, November 02, 2007 1:26 PM
Subject: Re: [EVDL] Circuit racing and continuous duty


>I believe Bill Dube ( correct me if I am wrong Bill) ran BEV 4wheelers in
>the Pike's Peak hillclimb. Maybe it was
> somebody else?
> It's pretty short, shorter than an oval or road-race, but measured in
> minutes, not seconds like the drags.
> John
>


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