Could Mass-Produced Electric Cars Finally be on the Way?
February 06, 2007
EEStor, a company located in Cedar Park, Texas, has been quietly working on an energy storage device that might be powerful enough to be competitive with the internal combustion engine.
The device, called an Electrical Energy Storage Unit (EESU), is not a battery because it is not chemically powered; in fact, it contains no hazardous materials of any kind.
If it functions as advertised, however, it will store enough electricity in five minutes of charging to drive 500 miles for about $9. That would work out to about 45 cents a gallon for an equivalent gas-powered car.
According to a patent issued in April, the device is made of a ceramic powder with a barium-titanate insulator, coated with aluminum oxide and glass.
It works as a combination of energy store and ultracapacitor, which can completely absorb and release a charge at high rates. A bank of these ceramic ultracapacitors could be used at "electrical energy stations" where people on the road could charge up.