Thursday, 29 December 2011

New graphene lithium-air batteries increase energy density & decrease costs


SIM-LEI EV gets a video walk-through: shaped like a fish, has a big screen (video)

Zero to 100km/h (62mph) in 4.8 seconds, with maximum speed of 150km/h (93mph), range of 333km (207 miles).

So what's the catch?  Tastes vary, but this is ugly.  First assumption would be that this is for aerodynamic purposes.  In the articles linked below, a "tiny coefficient of 0.91" is quoted.  Update 01 January 2011: "tiny coefficient of 0.91" should have been a tiny coefficient of drag of 0.19, which is actually tiny.  To put this in perspective, the coefficient of drag (Cd) of some other energy efficient cars:

0.28 Chevy Volt
0.32 Honda Insight (2010)

Toyota claims a Cd of 0.25 for its Prius, but other manufacturers claim it is more like 0.30 .

http://www.engadget.com/2011/12/28/sim-lei-ev-gets-a-video-walk-through-shaped-like-a-fish-has-a/

http://www.engadget.com/2011/03/31/sim-drives-sim-lei-electric-car-achieves-207-mile-driving-range/

https://www.youtube.com/watch?v=VPwphfWTZ6w&feature=uploademail

And a discussion of Cd:

http://ecomodder.com/forum/showthread.php/gm-chevy-volts-cd-0-28-prius-0-a-11313.html

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