Published on December 20th, 2012 | by Nicholas Brown


Wireless Car Charger For The Chevy Volt

December 20th, 2012 by  

Excitingly, Momentum Dynamics Corporation has announced that it was able to wirelessly charge a Chevy Volt. The company also proudly noted that it provides the safety and all-weather automatic operation that wireless charging can offer. (The safety benefit is basically only outdoors, where the vehicle would be exposed to water.)

Wireless electric car charger for GM Volt.

Momentum Dynamics was able to provide 20,000 watts of power to the vehicle. Typical 120-volt, 15-amp power outlets cannot provide more than 1,800 watts of power, and typical 240-volt, 13-amp outlets cannot provide more than 3,120 watts of power.

There are 240-volt power outlets that can be set up to deliver 50 amps (12,000 watts), though.

Charge time is limited by both the battery’s current handling capacity, and the power the charge can provide. The charger needs the current handling capacity to deliver the entire 24 kWh (for example) that a battery pack needs.

Improving Charge Time Is Key To EV Proliferation

Charge time is of paramount importance to widespread electric vehicle (EV) adoption.

If your electric car offers 73 miles of range, for example, and you find that you are about to run out of it, then you would normally have to plug in for hours to be able to drive much further again (assuming you are driving a 100% electric vehicle, not a plug-in hybrid electric vehicle like the Chevy Volt).

However, if you could charge the battery in 10 minutes, such as a Toshiba Supercharge battery, this would not be a major issue, and you could be on your way very quickly and easily.

If you could do so wirelessly, that increases the convenience even a bit more.

“Momentum Dynamics has surprised many people in the industry by the amount of power that can be safely delivered without the use of cables, and by its low-cost relative to plug-in chargers,” said company CEO and co-inventor Andy Daga.”

“We do for EV charging what systems like E-ZPass® have done for automated toll collection — except in this case it’s about more than reducing toll gate congestion — we are actually enabling the growth of an international industry,” said Daga.

This type of charger is probably most convenient in the parking lots at peoples’ offices, since they are sure to park there often but probably don’t have the ability to plug in like in their garage.

Another use for this type of charger is range extension. One concept is to place it on roads (especially at stoplights) so it charges cars at least partially to extend their range.

We’ll see where the company goes with this and if it is implemented in some of the above ways.

Source: ADVFN

Check out our new 93-page EV report, based on over 2,000 surveys collected from EV drivers in 49 of 50 US states, 26 European countries, and 9 Canadian provinces.

Tags: , , , , , , , , , ,

About the Author

writes on CleanTechnica, Gas2, Kleef&Co, and Green Building Elements. He has a keen interest in physics-intensive topics such as electricity generation, refrigeration and air conditioning technology, energy storage, and geography. His website is:

  • I would note the lack of two items;
    First, what is the cost for equipment and installation on the vehicle?
    Secondly, what is the cost of the supply unit?
    also, is there a big hole in the cement under that pretty round red plastic cover, and if I drive over the red part with my tire am I going to destroy it? what about if is sitting in an inch of rainwater (Many parking lots don’t drain quickly.)
    Lastly why is this better than plugging in a “Non Energized Cord and Socket? As J1772 is supossed to provide?
    And a J1772 can be purchased from Home Depot (On-Line) for only $650…

    • Bob_Wallace

      I’ve seen a different wireless charger that was suppose to sell for about $3k. I would imagine that to be the “early adopter” price and that the cost would drop a lot with large scale manufacturing. I wouldn’t think they would end up being much, if any, more than other charge systems. They just have a coil of wire rather than a plug.

      I’m almost certain the units are designed so that one can drive over them without damaging them.

      The other model I saw glued down to the parking spot surface as did the connecting wire in a protective covering. I would expect them to be weather tight.

      Why is it better? Park and charge. Convenience. No worry about some jackass unplugging your car when parked in a public place.

      South Korea is testing buses that charge while moving from coils buried 8″ under the road surface.

      • The engineering is more complex if transmitting the power levels they are indicating. The Korean bus uses a long front to back narrow loop as a pickup and that increases efficiency, but at 50 fet long it won’t fit under a car… Perhaps the car side could be lowered down to charge with only a tiny gap and raise up when not charging for road clearance???

  • Car charger

    Thank You,

    The information you shared is very informative Car

  • stan

    How can it be absorbed so fast? The only reason it takes a battery so long to receive a charge, is that the power must go thru the outer layers of the battery to get to the inner layers….too fast, and it’ll fry….so why is this dfferent? It’s not from being wireless….flow is flow…whether it’s thru copper or air….actually, there IS a company, I read about here, that has designed a batter that receives a charge “thru out” all at once…but even it needs 15 minutes or more….I hope this isn’t another solyndra

  • jhonuyba

    I love this blog much, it’s a real nice place to read for chevy chevy’s year end event you also love after searching thank’s

  • Sean

    ARGH! This is disgusting!

    “Momentum Dynamics was able to provide 20,000 watts of power to the vehicle. Typical 120-volt, 15-amp power outlets cannot provide more than 1,800 watts of power, and typical 240-volt, 13-amp outlets cannot provide more than 3,120 watts of power.

    There are 240-volt power outlets that can be set up to deliver 50 amps (12,000 watts), though.”

    Wait, What?


    The Momentum Dynamics device enables charging at 20KW. This is almost double a 240 Volt, 50 Amp industrial connection (12Kw) and much more than the household 120V 15A (1.8Kw) or 240V, 13A (3.12Kw) connections.

    I’m normally a big fan, but the structure of this whole article is rubbish.

  • Bob_Wallace

    Percent efficiency?

    What’s the lost energy cost for not using wires?

    • Ronald Brak

      Apparently 91%, which is about one percentage point better than I expected, according to this article:

      Or not according to this article as I can’t seem to drag and drop the link.

Back to Top ↑