[urq] Thought-provoking stuff.......NAC, but all Car stuff.
Steve Eiche
seiche at shadetreesoftware.com
Tue Jun 12 14:51:04 EDT 2007
Jim,
There is no conspiracy on why electric and hybrid cars haven't caught on
yet. They just haven't been practical or desirable because the
technology just wasn't there. Would you _really_ want to drive
something like a Honda Insight? I wouldn't, and apparently not many
other people did either. What the first electric vehicles (EVs0 and
hybrids did prove is that we are getting close to having EVs that _are_
practical as daily transportation. I think in the next few years with
the recent battery technology that has come out we will see some REALLY
interesting vehicles. The electronics to do the job has been available
for years, but battery technology has not.
For example, I've recently taken up electric powered RC airplanes
(honestly, I've gotten kind of soured to the car hobby lately). There
is a big surge in the popularity of electric flight with the new high
discharge rate, light weight lithium polymer (Lipo) batteries in the
last few years. In my planes I use 2200mAh 3 cell 11.1V (half charge
voltage - full charge is 12.6V) that you can draw 40+ Amps from with a
weight of less than five onces. One charge (takes an hour) will fly my
27oz., 200W, 42" wing span aerobatic plane for about 20 minutes, and my
24oz., 150W, 39" wing span trainer for a half an hour. There are guys
right now flying electric 1/3 scale 20lb aerobatic planes with
incredible performance. (Back to car stuff here.) The problem is, and
what has been making lithium polymer battery use in EVs problematic is
that you MUST NOT over discharge or over charge Lipo batteries or they
can burst into flames. Think magnesium fire or those flaming laptop
batteries that got recalled. Bad. They will also burst into flames if
punctured (bad thing to happen in an auto crash). On top of that, the
operating and storage temperature range must be kept within a range that
is narrower than typical climatic extremes (you do want to be able to
drive if it is less than freezing...).
BUT, there is new technology now on the market. A company called
A123Systems has a new lithium phosphate 3.3V cell that has a super high
discharge rate (60Amp sustained or 120Amp on a 2300mAh cell for a 10sec
pulse - think incredible torque as electric motors have maximum torque
at 0RPM - I'm thinking unlimited vertical on my RC plane). These also
have a long life (1000+ cycles) and are inherently safe(r) than other
existing battery technologies. Another big plus is a super fast charge
rate of 4X capacity. A full charge takes just 15 minutes. With a -30C
to +60C operating temperature range, you will be able to drive in
winter. When you hear GM say that they are waiting for battery
technology to catch up, I think what they are referring to is production
capability of these types of cells to get to vehicle production levels.
You will need A LOT of these to power a car. In terms of price, these
cells are actually a bit cheaper than a comparable Lipo cell and weight
is about the same. Right now there are some high end power tools
available with these.
Would I drive an electric or hybrid car? Hell yes, but it has to be as
practical as a gas car and fun - no, I don't want a Prius. The Tesla
sports car with it's Lipo batteries will surely start to open people's
eyes in terms of the performance capabilities of EVs. IMO, until EVs
are practical, fun AND affordable with unsubsidized prices, John Q.
Public is not going to want them.
Steve
Hey quattro fans,
Please forgive the NAC, and also posting to the three lists I subscribe
to, but I saw
something last night that is starting to disturb me. Let me start by
saying that I am a
quattroholic, currently owning a '95 S6 Avant, a '91 200 TQ 20V and an
'83 ur. I've had a
total of 8 Audis (7 quattros) in my driving career and have loved every
one of them. That
said, I just watched "Who Killed the Electric Car" last night and I
found it quite
compelling. I also found it quite disturbing. If you haven't watched
it yet, I suggest,
even for entertainment sake, that you go and rent it. Now, I'm not one
of those
"conspiracy" types, but I find it quite troubling to know that we, the
car buying public,
are not given the option of purchasing a different propulsion technology
for our
transportation that would seem on the surface to be very economical,
reliable, "emissions
free" (I put that in quotes on purpose....of course I know it takes
either nuclear,
natural gas or coal to make the el
ectricity to charge the damn things,) etc. The fact that the major
automobile
manufacturers have gone to great lengths to destroy every last EV they
had made makes for
some interesting "conspiracy" thoughts in my mind. What are they trying
to hide?
My intent here is merely to provoke some mindful thought about what we,
as consumers, are
facing in the real world when faced with high gas and oil prices (while
oil companies are
enjoying record profits), environmental pollution from oil and gas
spills, and not to
mention Global Warming due to internal combustion engine exhaust, (I'm
not even going to
go into the geo-political conflicts costing American lives in the
oil-rich Middle East.)
And to also inform people that there are (were) other viable options
available as recently
as 5-10 years ago that could possibly have kept us from the possible
environmental
predicament we are currently facing. Am I willing to give up my trio of
quattros at the
moment? No, but I am thinking of the possibilites of transforming a
4000 quattro to
electric power sometime in the future........the technology is there to
do it.
I invite all thought provoking criticism, constructive and otherwise.......
Best regards to all,
More information about the urq
mailing list