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Posted by bob on April 2, 2008, 8:26 pm
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> Tomes wrote:
>> "bob" ...
>>> when will this technology be in the new ones?
>>>
>>> will you be able to use lithium ion batteries as replacements for the ni
>>> mh currently in them?
>>>
>> There is no need to replace the batteries. They have not been failing in
>> any manner of significant numbers at all.
>> Tomes
>
>
> It's not because of failures... these are reliable battery packs.
>
> NiMH can be replaced by Lithium-based batteries of the same weight to
> produce higher capacity and therefore longer drive times. Fewer cells are
> required, as each NiMH cell is 1.2V while each Li cell might be 3.7V
> (depending on chemistry), with similar current density (amps per unit
> weight).
>
> One major issue is safety. With a laptop, temperatures are reasonably
> controllable. In a car, however, the temperature range can be extreme.
> Everyone working on hybrid and electric cars is focused on this, and it IS
> being solved.
>
> I've been considering one of the lithium battery kits for my '04 Prius,
> but it runs so well that it doesn't make sense to experiment with it.
> Instead, I'll give it to one of my kids when the HOV lane sticker runs out
> and buy a lithium battery Prius (hopefully plug-in!) to replace it.
>
> Since much of the grid energy derives from coal, hydro, and nuclear
> sources, plug-in is a great way to clip the petro umbilical and stop
> writing checks to people who hate us.
not to mention reduced greenhouse gases? :-)
main reason i'm asking about the lithium ions is that i had a job interview
a couple months ago with a company in S.C. who makes membranes for lithium
ion batts and that said they were going to be in priuses in 2010 - 2011 -
was curious if they were blowing smoke, which i believe they were......
bob
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