1523Re: [solectria_ev] Re: Who has an NiMH Force?
- Nov 1, 2005While 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 certainly
wouldn't use passive cooling during the summer pretty much anywhere
south of Canada.
Just my two cents,
>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.
>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
>A liquid cooling system would be more efficient.
>In a message dated 10/31/2005 9:01:35 PM Pacific Standard Time,
>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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