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Japanese automaker Toyota has entered into a technological collaboration agreement with Boston, MA-based WiTricity Corporation. The agreement centers on the practical application of automotive wireless charging systems for plug-in vehicles and promotion of their widespread use. Additionally, Toyota will assist WiTricity in raising capital.

WiTricity's wireless technology uses resonance, which allows charging without direct contact and is claimed to be more efficient than electromagnetic-induction, another type of wireless charging technology. The power transfer efficiency of a WiTricity wireless system depends on the size of the power source and capture devices and on the distance between those two units. Maximum efficiency is claimed to be around 95 percent. Toyota believes that resonance wireless charging is suitable for automobiles and hopes that its work with WiTricity will lead to widespread adoption of this so-called cutting-edge technology. It's not the only company to think that. Back in November of 2010, global automotive supplier, Delphi, established a similar collaborative agreement with WiTricity.

[Source: Toyota]
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TMC and WiTricity Form Wireless Battery-charging Alliance

Toyota City, Japan, April 27, 2011-Toyota Motor Corporation (TMC) has entered into a technological collaboration agreement with Massachusetts, United States based WiTricity Corporation* concerning the practical application of automotive wireless charging systems and the promotion of their widespread use. TMC plans to participate in a WiTricity capital increase.

WiTricity's charging technology uses resonance, which allows charging without direct contact and is more efficient than electromagnetic-induction, another wireless technology-but one that requires contact-that is starting to come of age in mobile phone and other chargers. TMC believes that resonance wireless charging is suitable for automobiles and aims for its early practical use.

The collaboration is aimed to accelerate development and eventual implementation of wireless charging for automobiles. The charging of a plug-in hybrid or electric vehicle could be as simple and convenient as parking near an embedded charger at a home or in a parking facility.

In the Toyota Global Vision announced in March, TMC expressed its commitment to leading the way to the future of mobility by integrating automobiles, homes and information technology. Wireless charging is just one of the many technologies TMC seeks to develop for the future.


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    • 1 Second Ago
  • 10 Comments
      Randy C
      • 4 Years Ago
      I don't know why they continue to pursue this. Of the various methods to transfer electrical energy this is one of the least efficient. Anybody who has studied the physics of transformers knows that this configuration is prone to large amounts of loss. The distance between the primary (ground) coil and the secondary (car) coil will increase loss. Any misalignment of the coils front to back or left to right will also increase losses. This is energy you're paying for that does not make it to your car. This concept was probably proposed by executives that see wireless networking and say let's do it with EV charging. Executives by definition don't study physics they study business. Like reporters, they don't have a clue as to the realities of electric vehicles.
      2 Wheeled Menace
      • 4 Years Ago
      Yes, maximum efficiency is 95 percent.... how about the real world efficiency? often times for inductive charging, it is in the 80 percent range. I don't like it.. it's a waste of energy. There are already various power losses from the power station to the wheels that end up adding up to a 50-70% loss altogether for an electric car. Electricity may be cheap, but there are no good excuses to waste energy in the name of a small convenience.
        skierpage
        • 4 Years Ago
        @2 Wheeled Menace
        Where do you get 50-70% loss? Electric transmission & distribution losses are around 7%, charging inefficiencies are about 10-20% (which this resonance charging will have as well).
      • 1 Year Ago
      Ref PM / EVCE / 2013 / 12 / 01 Dated Dec. 19, 2013 Sub.. Arrangements for setting up Road for Electric Vehicle Charging Dear Sir, We are going to establish a fleet of Electric buses for operation in various cities of Pakistan. These Electric buses will be operated with in the city, as City Bus. Further, we are going to establish a facility for the manufacturing of Electric cars, electric rickshaw and electric motorcycle. It has been brought in to our knowledge that you manufacture, install, construct the roads for electric vehicle charging, based on wireless and based on physically of charging wires. We have plan to start with, initially food major cities of Pakistan. Total requirements of these roads will be 20, initially. You are requested to kindly forward us, Full Corporate Offer, Duly sported by the following information 1 – Ex-factory price of the each road setup, 2 – Fright charges up to Karachi roads, 3 – Cost of the sea insurance 4 – Cost of the installation / construction of this road in Pakistan 5 – usual / normal length of the road 6 – Time required for charging of Electric bus and of electric car 7 – All other required information. After receiving your offer we may plan to visit you. Thanks and Regards Muhammad Saeed Cell +92-332-5440-965 Email : eurotechnologies72@yahoo.com
      Tysto
      • 4 Years Ago
      If the cable and plug on a standard charging station is found to be prone to wear and tear, then this could end up being more practical. There's nothing to wear out.
      • 4 Years Ago
      if Toyota really work with this team, the only purpose is to get this article on the media. Inductive charging over road clearance at home is basically leaving electric stove on in your garage.
      KenZ
      • 4 Years Ago
      Totally agree with 2 Wheeled Menace. I know we're all about the glory of electric vehicles, but even if it gets 95% efficiency, that means compared to plugging in a plug, you're throwing away 5% of your money. I find it comical that people worry about "vampire power" from phone chargers (relatively negligible) but get excited about a technology that throws away 5% of a very large amount of power. I see people driving across town to save 2 cents on $4 gasoline here in California. Might I point out that this is driving across town to save 0.5% on cost. But in this case, we're basically saying people are too lazy to stick a plug in to save 10x that percentage in cost. It doesn't make sense.
      markkiernan
      • 4 Years Ago
      This would a great system for gas stations.
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