Quote:
Originally Posted by lkimura
The Volt can go 40 miles on an 8 KWH charge and uses a cutting edge, 300 pound lithium ion battery. If this car can go 200 miles what is the battery technology? Have they discovered something new? If so, the article didn't mention it, only the fact that this car will use a lighter electric motor. If this car weighed only half of the Volt, I could see a claim of 80 miles, but 200 miles, this seems really optimistic. At half the weight of the volt (about 1900 pounds) it would still need a battery capable of holding about 20 KWH. If the Volt's state-of-the-art battery weighs 300 pounds and holds 8 KWH, a 20 KWH battery using the same technology would weigh 2 1/2 times as much, or 750 pounds. That only leaves 1150 pounds for everthing else. What does everyone think? The number don't seem to add-up to me.
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Even your estimates are optimistic. The range of an EV is more dependent on aerodynamics and tire friction than weight (because more weight = more energy regained from regenerative braking).