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Power Transportation Hardware Technology

Experimental Batteries Charge In Minutes 335

Posted by CmdrTaco
from the but-i-want-it-now dept.
Zothecula writes "Of all the criticisms of electric vehicles, probably the most commonly-heard is that their batteries take too long to recharge – after all, limited range wouldn't be such a big deal if the cars could be juiced up while out and about, in just a few minutes. Well, while no one is promising anything, new batteries developed at the University of Illinois, Urbana-Champaign do indeed look like they might be a step very much in the right direction. They are said to offer all the advantages of capacitors and batteries, in one unit."
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Experimental Batteries Charge In Minutes

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  • Sure (Score:2, Informative)

    by Shivetya (243324) on Tuesday March 22, 2011 @11:13AM (#35573282) Homepage Journal

    Stretch a cable between two lamp posts, run another cable to the clock tower and then recharge only during thunderstorms.

  • by MightyYar (622222) on Tuesday March 22, 2011 @11:29AM (#35573576)

    I apologize in advance for my lack of electrical knowledge. But would anything resembling modern standard household wiring even be able to handle that?

    Older houses are often wired for 60 Amps, and they don't stand a chance.

    Some newer houses with big AC units go as high as 200 Amps. More typical I think is 100 Amps. The Nissan Leaf has a 24 kW-h pack. To "quick charge" that in an hour with 100% efficiency would require 24kW (duh). At 240 V that is 24kW / 240V = 100 Amps. So a newish house could do it if it had a separate 100 A 240V feed just for charging the car. I figure that would set you back about $3000, so it's not out of the question. :)

    More likely, you'd pull up to a charging station that has a big industrial feed at a higher voltage so that you don't need a copper wire the size of your arm.

  • by Black Gold Alchemist (1747136) on Tuesday March 22, 2011 @12:22PM (#35574430)
    That number is wrong, because it calculates the energy in the gas that goes into gasoline cars. 80 kWh/100 km is 1,287 watt*hours/mile, five times higher than the average EV highway energy rate of 250 watt*hours/mile - electric cars are 5 times more efficient at using energy than gas cars. At low speed (city driving), a EV consumes around 150-160 watt*hours/mile, similar to the Japanese rail system, which gets 150 watt*hours/passenger-mile.

Any sufficiently advanced bug is indistinguishable from a feature. -- Rich Kulawiec

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