WiTricity Announces New 11 kW Wireless Charging System

JUN 30 2016 BY MARK KANE 30





WiTricity has announced a new 11 kW wireless charging system characterized by interoperability across vehicle types and power levels, complying with recent SAE wireless standards issued in May (TIR J2954)

Better still, the efficiency is stated to be between 91 to 94%.

According to WiTricity (which also has developed 3.7 and 7.7 kW systems), the magnetic resonance technology can be scaled up to 25 kW and more if future EVs require higher power.

As of today WiTricity still is tight lipped about the first EVs which could use its 11 kW system, other than they will arrive in 2017.

“WiTricity, the industry pioneer in wireless power transfer over distance, today announced the automotive industry’s most efficient and flexible high power electric vehicle (EV) wireless charging system.

The system leverages WiTricity’s magnetic resonance technology to deliver a range of power over distance and through materials — enabling transfer of up to 11 kW, with the ability to scale to 25 kW and higher for next generation automobiles with higher power requirements. WiTricity successfully completed testing and validation of a 7.7 kW version of the new system last week, under a testing program sponsored by the Society of Automotive Engineers (SAE) wireless power transfer task force, at the U.S. Department of Energy’s Idaho National Laboratory. The WiTricity designed and built system was submitted in cooperation with Nissan, the world’s leading supplier of electric vehicles.

Mercedes-Benz S 500 e plug-in hybrid gets a battery boost and wireless charging in 2017

Mercedes-Benz S 500 e plug-in hybrid gets a battery boost and wireless charging in 2017

Global EV adoption continues to grow, with all major automakers implementing wireless charging systems for full electric and plug-in hybrid electric vehicle (PHEV) platforms.

The first wirelessly-charged vehicles will hit the market in 2017, with additional models following in each year. For mass adoption of EVs, carmakers realize that wireless charging systems must be interoperable across brands, so any EV can charge wirelessly at home and at public charging spots. Interoperability requires standardization, and WiTricity is guiding international standards efforts through its leadership and participation in industry groups including the SAE (Global), IEC/ISO (Global), DKE (Germany) and CATARC (China). The new high-performance WiTricity system is designed to offer the utmost in interoperability, working across vehicle brands and vehicle types ranging from sports cars and sedans to SUVs, including all-electric and PHEV platforms.

While Nissan has yet to confirm it...the next generation LEAF will also feature wireless charging

While Nissan has yet to confirm it…you can bet the next generation LEAF will also feature wireless charging in 2017

WiTricity’s new system works at 3.7 kW, 7.7 kW and 11 kW, providing carmakers with solutions for their full range of vehicles, and has the capability to scale to higher power levels as needed for future EV models. The charger can be deployed as a “floor pad” in a consumer’s garage, and can be installed below the surface of the pavement to provide wireless charging in public and commercial parking lots. The system operates at very high efficiency of 91 to 94 percent, superior to many wired charging systems that are now on the market. Incorporating WiTricity’s breakthrough TMN™ technology, the system offers unmatched efficiency, flexibility and interoperability.”

“WiTricity is working with major automakers and Tier 1 suppliers to bring the next-generation of wireless EV charging to a commercial reality. Licensing agreements have been announced with Toyota, Delphi, TDK, IHI and BRUSA. The company is also collaborating directly with leading carmakers to drive global standards for wireless charging systems.”

Alex Gruzen, CEO, WiTricity said:

“We’re thrilled to be announcing this new system and proud to assume the mantle of high-power charging leader. Having engaged with the automakers to comprehend their key requirements, I’m confident in the huge impact WiTricity can deliver for the industry and consumers. EVs have the potential to change transportation in a massive way and simplifying the charging experience is foundational to broad driver adoption. This system will help drivers get power conveniently and efficiently without having to think of plugging in.”

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30 Comments on "WiTricity Announces New 11 kW Wireless Charging System"

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25kW sounds great. I wonder if they can scale further like to 125kW to make fast charging a breeze?

Hum… you would need 125kw worth of onboard charger… Tesla has 20kw…

Tesla has 11 kW, so if you have the double chargers you can go to 22 kW.

But so what? That fact Tesla doesn’t offer more doesn’t mean it’s necessarily too difficult or expensive. The Renault ZOE onboard charger was 43 kW…

Oh come on… At 25 KW and the capability to embed in the pavement, build that into the roads and nearly all EV’s can travel forever without the need to stop to charge.

My own garage – I’m good with a wired plug.

You’d need an awful lots of chargers to keep cars going.

It’s called Dynamic Wireless Charging.
I don’t think we will ever see that for the simple reason that it would create a big problem for our roads.
Wireless charging has a somewhat small bullseye. On my Plugless, it’s a bout a 6” by 6” square. so that means you would have to stay within a 6” widecenter line to charge on the go. That would create divots as long as you can see on our highways cause all cars would have to be in exactely the same space on the road to get max efficiency. Battery density will adavnce fast enough to make dynamic charging irrelevent.

I think auto-pilot could handle driving in a straight line.
And I think better materials could handle the “divot” issue.

The infrastructure cost (leaving aside whether such a project could ever get legislative approval) just isn’t / wouldn’t be worth it.

Witricity have been really good at announcing things for years now but, no systems are available for consumers yet. Efficiency of 91 to 94 is better than Plugless but needs to be verified by an independent lab, like Plugless was. The plug will be a thing of the past, sooner than i taught but, for fast charging, will remain the standard IMO. But for everyday charging, 3.3kW is barely adequate, 6.6kW is ideal.

There’s also the small matter of cost. Not a problem on the premium end, but relevant on the mainstream end.

Plugless is available for about twice the price of a good L2 EVSE plug. If the option is available on a new car, i think it would be even cheaper than buying after market. It does not need to be expensive, it’s a pretty basic and simple system with few parts and none of them are high cost.

it is marketing, 94 % means the power chain stages basically all have to be 99% or close. I doubt it. The PFC section using GAN devices can be 99% (it has been done before) but all this is expensive and not practical. Not to mention,when you add the protection features required, the efficiency suffers

I am OK with the cord at home. However to pull into a public parking space and charge automatically would be awesome.

What a waste.

I fail to see why we need wireless charging.

This will increase the energy used – and the cost – by 6-9% over the lifetime of the car. And for what? It takes about 15 seconds to plug in.

Not only is it more expensive to use – but you have to buy the system, as well.

I agree
But people are so lazy that they have toaster, fridge, coffee maker, phone, clothe dryer, washing machine, watch and just about anything, ringing, yelling and buzzing to awake people that something is over or about to go.

People, need to learn to breathe again, but wireless will succeed unfortunately.

Sorry, but what if you also fail to see that maybe, just maybe, people are not as inclined or amused as much as you are about plugging and unplugging a car? Do you really fail to see the convenience wireless bring to EVs in the eyes of the non-converted? We all know a gas car is, at best 30% efficient so if you convert someone to go with a wireless charging EV that is, oh, not 90% efficient but 89% efficient, is it not an overall gain? If i choose to drive a Tesla over an Imiev, am i not wasting ennergy also when we know that a Tesla uses 50% more energy to drive the same mile? you’ve been here for as long as i have and you know that this horse is dead. Let it be. convenience sells, you know that. Driving an EV is very cool. Plugging it in, not so much. now driving a wireless EV, that’s ubercool! You know something, i can’t help but to imagine that if the system was installed on your car for free, i would love to see you park the car, turn it off, and hear the beep before you… Read more »

You are slow, I use less than five seconds ;-).
But for those parking overnight in the streets this must be brilliant.

I always thought these were kinda silly until my daughter complained about how horrible it is to have to put gas in her hybrid. This first world problem could be a big selling point for EVs. Park the car and when you return the battery is charged and your hands will never smell like gas again

I believe that wireless is the future of EV charging. It is almost as inevitable as EVs themselves.

Personally, I am getting one for my ELR. We just need a couple of competitors out there. Plugless has zero competition, so, their system costs double what it needs to be. I might bite on their pay-per-month deal anyway.

The other ‘gotcha’ is that the car needs to be parked in exactly the same spot every time. With wired, I can park in either bay or outside bay one and charge with my L2. I need to do some serious reconfiguration of junk (yep pure junk) to get to that point in my EV life.

Maybe for home charging they can team up with Roomba, so you can park anywhere and have the unit find you :O)

Lol! But then, you are talking machanical. And that’s what we are trying to get away from.
Digital charging for digital cars.

an aside — do any of the engineer types here have an idea what the lifespan of the device is? or if they are easily repairable? Under pavement sounds like utopia, in My bias, but how hard is it to fix it when it finally dies?

If the company is reputable and will be around for a while (e.g. GE or Siemens), multiply the warranty by 2 or 3, and that’s probably what you can expect for most electronic devices. Failures generally happen in a bell curve and companies with the long game in mind can only afford to fulfill so many warranties. If it’s a startup, it’s a total roll of the dice – could be way overbuilt and last 50 years, or they could be desperately trying to deny warranties to avoid filing for bankruptcy a year later. The life will likely be limited by the control electronics, not the “pad” that’s not much more than a coil of wire – so it will be highly variable based on the quality of the components used and build. Probably the first thing to fail will be the mechanical bearings in the cooling fans for the electronics. Even 6% of 7.7kW is still on the order of 500W of heat being created at full tilt – ever stand in front of a 500W halogen bulb shop light? – it’s really hot! Presumably these will be built with thermal protection to cut back the power if the… Read more »

good points, Malevolence, Thanks!

It’s simple. Eventually, wireless chargers will be everywhere. At the football stadium. At Costco. At the local pharmacy. Even at your favorite restaurant. Doesn’t anybody get it ?

Widespread wireless charging will make it so that You will never have to get out of your car to refuel again. Think about it……

For a slight premium due to wireless charging losses you could be set free from having to make a formal refueling stop ever again. That sounds like a pretty good trade-off to me.

Even taking into account losses, wireless is still cheaper than traditional gas or diesel.

What if somebody said:

“You will never have to get out of your car to refuel again ? ”

Well, that’s exactly what wireless charging does for you.

It’s a no brainer.

Jmac I think you’re right.
Is Tesla moving in this direction?

@ David,

Most inductive chargers aren’t capable of charging your car at super charger speeds. I think that’s why Musk has never mentioned the idea publicly. They are very convenient especially if your car will be parked somewhere for any length of time such as at work or overnight in the garage.

Of course if they can increase the power to 500 KW or one MW, then they would be in the game again but till them an under the car mini pantograph system with secured contact is the only one that can deliver 100 % yield and be used for low power 11 KW AC charging as well as high power 1500 V 500 KW DC charging at equipped supercharger stations. Beside public parking’s equipped with 2 secured inox contact on top of a small bump on the ground, would still be way less expensive than an induction system at every parking spot.

The actual interest of induction charging is for underwater submarines charging where it is close to the only possibility.