by The_Toecutter » Thu 04 Jun 2009, 19:40:53
$this->bbcode_second_pass_quote('patience', 'A') small, lightweight EV is quite practical with present technology. but the expectations of the average potential buyer of same are not practical at all. Detroit and others are caught in that dilemna, trying to achieve the impossible, that is, to create an EV that perfectly supplants present day cars. Can't be done now. We could compromise on cost, range, weight, luxury, performance, size, etc., but compromise is not in the spoiled public's vocabulary.
On the contrary, the automakers could address the issue of aerodynamics, and there would be no compromise. The only problem is, they want to sell a car with a 0.30 Cd, then a 0.28, then a 0.25, and so on and so forth drag coefficient before selling a car with a 0.16 drag coefficient. Planned obsolescence has got to be done away with for this to work, and GM and their ilk are not going to let that model go.
80 mpg midsize cars with no compromises were possible more than 10 years ago and with addressing aerodynamics, a midsize EV car that reliably can obtain 100+ miles range on the highway using a 1,000 lb pack of lead acid batteries is certainly doable. High school students and hobbyists have already built EVs with 120-140 mile ranges using lead acid golf cart batteries, and they don't have the best possible drag coefficient that a ground-up car could have nor the resources of the major automakers.
Then there's the large-format NiMH battery; it has longevity measurable in decades, twice the energy density of lead acid, and in volume, would be comparable in per kWh cost to Li Ion. The Toyota RAV4 EV, using a 26 kWh pack, could go more than 100 miles per charge on the highway; the RAV4 EVs in Southern California Edison's fleet have collectively driven millions of miles with these batteries, with some vehicles having more than 150,000 miles on the odometer with the original battery pack and with the same range and performance the vehicles had when they were new. This chemistry allowed the Solectria Sunrise midsize sedan to go 373 miles per charge in the 1997 Tour De Sol using batteries with half the density of today's Li Ion; James Worden, the designer, claimed $20k in mass production for the Sunrise, but the major automakers refused to touch it.
Viable, long range EVs, are so 15 years ago...
$this->bbcode_second_pass_quote('', 'U')ntil the general public gets the real picture, the WHOLE picture, I don't see the EV hitting mainstream.
If the general public would buy a Ford Focus or a Toyota Corolla, then I see little reason why they would reject a Solectria Sunrise or perhaps an electrified version of GM's Precept. With streamlining, the range of an EV on the highway is effectively doubled, per unit of battery weight, over a normal car without the consumer making any sacrifices to get it. The current cars on the market have all the same styling cues a streamlined car would have, but without actually having the streamlining done to them... even the second generation Toyota Prius had a drag coefficient about matching the 1921 Rumpler Tropfenwagen and the Cd of a 2007 Prius is still 30% higher than that of the 1935 Tatra T77a.
The auto industry is embarassingly behind the times, and it is intentional on their part.
Streamlining our auto fleet could give us a 35-40 mpg highway V8 Chevrolet Camaro, or a 50 mpg highway V6 Toyota Camry, with no other changes.
$this->bbcode_second_pass_quote('', 'M')aybe Government Motors will decree EVs for everyone, and sink a boatload of my great grandkids cash into this?