In reply to Michel Jullian's message of Mon, 14 Sep 2009 12:19:30 +0200: Hi Michel, [snip] >Hi Robin, see here: > >http://en.wikipedia.org/wiki/Rechargeable_battery#Table_of_rechargeable_battery_technologies >
Thanks, that's very useful. :) However how do you know that the Fe ion technology mentioned is in fact referring to LiFePO4? >Energy density of LiFePO4 is not as good as Li ion (0.1 kWh/Kg vs 0.16 >kWh/Kg), which means their 72 kWh battery must weigh 720Kg --which may >not be much of a problem since EVs have regenerative braking--, but >cycle life is better (2000 cycles vs 1200 cycles). > >I also gather cost per kWh of capacity is lower. I seem to recall >reading USD 300 per kWh, which would account for about half of the >USD 40000 projected price of the car (300*72 = 21600). This would be >about USD 100 per cycle, i.e. USD 100 for 400km, i.e. USD 0.25 per km >or USD 0.40 per mile of battery wear out, this seems reasonable, >what's the wear out cost for an ICE of equivalent output power anyone >knows? > >Michel [snip] Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/Project.html
