View Single Post
Old 01-16-2009, 12:27 PM   #7 (permalink)
The Atomic Ass
Master EcoModder
 
The Atomic Ass's Avatar
 
Join Date: Oct 2008
Location: Mason, OH
Posts: 535

Overland - '24 Nissan Versa S 5MT
90 day: 37.88 mpg (US)
Thanks: 11
Thanked 20 Times in 17 Posts
Quote:
Originally Posted by rmay635703 View Post
But is the energy wasted to heat worth it?
I would have to run the battery under my own operating conditions to see what effect my driving cycle would have on it. But the company that builds them quotes a 17KWh module as having a parasitic heat loss of <110w, so a potential loss to heat of 2.64KWh daily, or 964KWh yearly, assuming no charge/discharge heat offset.

My plan would be to use solar panels on such a vehicle anyway, and be able to generate in excess of 5KWh per day. Ahh, my hopes and dreams which will never be fulfilled.

Also, as much as I like the energy density on some Lithium mixtures I've seen, they're still very voltage sensitive, and while certainly a vehicular pack should, I have no guarantee they'll last longer than my last laptop pack. Which was <3 years to unable to hold a charge. And in such a case I'd be money ahead on the Zebra battery. Really, at any point <10 years on the Lithium pack, I'd still be money ahead, even if that power to run the heat came from the grid.
__________________

Last edited by The Atomic Ass; 01-16-2009 at 12:38 PM..
  Reply With Quote