Nathan2go wrote:
By the way, I hope that companies who build electric car will notice that the inductive coupler described in the Berkeley paper would be perfect for an electric car charger.
It could sit on the floor of your garage and activate whenever the car is parked on it (the car would lower its coupler when the parking brake is engaged). This super convenient feature could make electric power a must-have feature for all luxury cars within 20 years.
Public chargers that conform to the standard would activate with a credit card swipe. Or possibly a data link through the coupler.
Consider that putting chargers under every parking spacing in every parking lot (to power plug-in gas/battery hybrids) would involve a lot less infrastructure than powering every mile of freeway.
- It would be almost as effective at replacing gasoline.
- It would be equally effective at solving range problems of electric cars.
- It would have a much more cost effective roll-out plan, as converting only a few parking spaces in each lot would be adequate for the first few percent of cars, whereas converting a small fraction of the highways could be worthless to drivers in non-powered areas.
The car mounted coupler would not need to be as long as in the powered free-way case, as the power density could be higher without the efficiency loss a freeway system would have.
Nissan already has an idea like that:
http://www.treehugger.com/files/2009/08/charging-nissan-electric-car-wireless-induction.phpThe important thing is to set up a standardized system so that all EVs can use the same charging stations anywhere in the country. They need to also set up a standard billing system where the car has an RFID that would automatically bill you for the electricity. This may be an issue, since I understand in some places the local
electric company has a legal monopoly on selling electricity.
There is a Wireless Power Consortium, that is trying to set up standards for wireless chargers, but it is for smaller devices like cell phones.
http://www.wirelesspowerconsortium.com/technology/how-it-works.html