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Look at the real prices - Let the dreaming continue !
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Posted by LG Aero [Email] (more from LG Aero) on Sun, 9 Sep 2012 07:10:08 Share Post by Email
In Reply to: Re: Let the dreaming continue !, Mark from Toronto, Sat, 8 Sep 2012 06:54:09
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Whilst it is not necessary for 100 kWh to move a D type car for 200 miles on a flat road with no additional apparent wind and at modest speeds the key point is to achieve that range in real world conditions where the ambient temperature may by 100 degrees or 10 degress below zero, there may be rain or snow which can increase power required not to mention terrain,style of driving, elevation changes, stop and go traffic jams etc. That is why I stated "reliably" in relation to range.

As far as price of batteries for lithium iron phosphate batteries the price is a little over $1 per amp per cell. So a 300 amp 3.3 volt cell costs about $335 from the manufacturer. That cell is about one kWh. Turning that into a battery pack involves other direct costs of interconnect, battery management system and encasement. So pricing of about $400 per kWh is where we are. A 50 kWh battery will reliably provide 100 mile range in the real world. That will cost $20,000. Just add that figure on top of the pricing of a conventional IC engined car because the trade off of the IC engine and associated components is more than taken up by the motor and inverter drive system. So a $30,000 Saab becomes a NEVS $50,000 car with 100 mile range or a $70,000 with 200 mile range.

The Tesla S base battery size is 45 kWh. The additional price for the 85kWh battery is $20,000 or $500 per kWh.

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