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Electric Vehicles: FUTURE WITH BATTERY-FREE ?
* Sweden - Volvo's electric roads concept points to battery-free EV future
Hällered,Sweden -Gizmag, by Paul Ridden -June 13, 2013: -- While quick charging technology installed at strategic points along a planned route might be a good fit for inner city buses, it's not going to be of much use to electric vehicles that stop infrequently. Volvo sees our future long-haul trucks and buses drawing the juice they need from the road itself, making large onboard batteries a thing of the past... Along with power generation and transport firm Alstrom, the company has constructed a 400 meter (1,312 ft) -long track at a facility in Hällered near Gothenburg, to test a truck fitted with a special collector that draws its power from rails installed into the surface of the road. It's an adaptation of technology that's been successfully used to supply electricity to trams in several cities around the world since 2003, and could help reduce an electric vehicle's dependence on big battery banks... The two power rails/lines run along the road's entire length. One is a positive pole, and the other is used to return the current. The lines are sectioned so that live current is only delivered to a collector mounted at the rear of, or under, the truck if an appropriate signal is detected. As an additional safety measure, the current flows only when the vehicle is moving at speeds greater than 60 km/h (37 mph)... When the collector comes into contact with the power lines, 750 V of direct current is delivered and routed to a water-cooled heating element, that has a similar power requirement to an electrically-driven truck. The collector has been designed to track the power rails, even when the vehicle is not directly over the middle of the contact lines...
Labels: electric vehicles charging stations EVCS, infrastructures
posted by Unknown @ 11:38 AM
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