Re: Renewable energy alternative

From: CM (CM_at_CM.not.really)
Date: 07/05/04 

Date: Mon, 05 Jul 2004 07:15:45 GMT

>>> As to hybrids vs all electric vehicles- the reason is that there
is
>>> at present no practical or economic energy storage scheme for the
>>> all electric driving other than short haul-plug it in as in some
>>> delivery vehicles or golf carts. Cost and weight are the
>>> limitations that hybrids are intended to overcome.
>>
>> That may change soon. There are some battery technologies that
could
>> give adequate range if certain technical problems could be solved.
>>
>> Lithium Ion batteries can give sufficient range now
>> (see http://www.acpropulsion.com/SEMAtrip2003.htm )
>> although the price is still high.
> -----
> I can see three factors to be considered :size/weight (or energy
density) as
> well as cost and life time (how many charge recharge cycles can be
handled.
> The battery on the site suggested is well on the way for energy
storage
> density and range. How does it fare with regard to life?

Not sure, as LiIon batteries have only been in use for a few years,
mainly in laptop computers, cell phones, digital cameras, and other
high power demand portable application. So far, they appear to be
fairly long lived, with many charge/discharge cycles.

LiIon batteries are rather fussy in their charging requirements.
Excessively high rates of charge or discharge can cause them to
overheat and possibly even catch on fire - as Apple computer found
out, much to their dismay. The first Powerbooks with LiIon batteries
got a bad reputation for catching on fire. With proper charge
regulation, that problem can be avoided.

CM

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