1530RE: [solectria_ev] Re: Who has an NiMH Force?
- Nov 1, 2005Hi Rex,
My commute on some days will be 21 miles each with no opportunity
charging available. 15 NiMH batteries will get me there and back.
From: email@example.com [mailto:firstname.lastname@example.org]
On Behalf Of Rex Allison
Sent: Tuesday, November 01, 2005 8:21 AM
Subject: Re: [solectria_ev] Re: Who has an NiMH Force?
Besides already having the NIMH batteries on hand, can
I ask what your motivation is to not stick with Pb
batteries. Do you have an exceptionally long commute?
Another data point I generally get 1.5Ahr to the mile
always driving in Normal mode with lots of stop and go
driving, flat grade, I typically use 12 Ahr between
recharges and try to keep my maximum discharge to 25
Ahr. I also keep the regen off below 8 to 10 Ahr
because of the squeeling from the regen current limit.
--- Adam Kuehn <akuehn@...> wrote:
> While looking into acquiring a NIMH force, I did__________________________________
> some pretty good
> research on the batteries. I decided that there was
> no way I could
> safely (for the batteries) operate a NIMH vehicle in
> North Carolina.
> It is simply impossible to keep the cells cool
> enough during charging
> and under load during the summers here. Personally,
> I'm not sure
> even a liquid system would be enough. I'm not sure
> where you are,
> exactly, but if it regularly hits the
> mid-to-high-90s there, I would
> seriously consider some other battery chemistry. I
> wouldn't use passive cooling during the summer
> pretty much anywhere
> south of Canada.
> Just my two cents,
> -Adam Kuehn
> >My Toyota made RAV4 EV with NiMH batteries uses
> fans continuously
> >during charging to cool the batteries and also
> turns on while
> >driving if any of the temperature sensors reach
> 100F. Many of the
> >RAV4 EV owners don't believe even that is enough.
> For instance if
> >the car isn't charging and it isn't running and the
> batteries are
> >above 100F the fans don't run, but the batteries
> sit there at too
> >high a temperature.
> >So it would appear with NiMH more cooling is best.
> >Stephen Taylor
> >theoldcars@... wrote:
> >Having passive cooling while driving would be good
> but I don't believe it
> >would be enough by itself to always keep them from
> over heating
> >while driving.
> >A liquid cooling system would be more efficient.
> >Don Blazer
> >In a message dated 10/31/2005 9:01:35 PM Pacific
> Standard Time,
> >nluneau@... writes:
> >Hi Jim,
> >I was thinking that passive cooling while driving,
> using directed air,
> >would save some of the energy required to cool the
> Ovonics. I was also
> >under the impression that the critical time to have
> adequate cooling was
> >during the charging cycle.
> >What do you think?
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