Wireless Charging, not a phone but the car! ?

[Larry]

This seems like borderline science fiction but who knows?

Wireless EV charging

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[BMT1071]

This seems like borderline science fiction but who knows?

Wireless EV charging

So did the device you used to post this message not that long ago. ?

 

[dml105]

So much wasted electricity...

 

[BMT1071]

So much wasted electricity...

He specifically addressed that and said the efficiency was comparable to wired charging.

 

[Larry]

He specifically addressed that and said the efficiency was comparable to wired charging.

Besides we’ve got plenty of coal to make more.

 

[JoeDimwit]

He specifically addressed that and said the efficiency was comparable to wired charging.

He is free to make whatever claims he wants. Until I see this work without losses, I call bullshite.

 

[ChasingCoral]

He specifically addressed that and said the efficiency was comparable to wired charging.

Current wireless car charging systems have about 94% efficiency compared to wired systems:
https://www.freep.com/story/money/c...ctric-cars-wireless-charging-pads/6428778002/

 

[dml105]

He specifically addressed that and said the efficiency was comparable to wired charging.

He can address it all he wants, but unless he is going to rewrite the laws of physics, this is going to waste tons of energy. Wireless is nowhere near as efficient as wired.

Don't just accept the dude's handwaving. Wireless charging wastes energy converting to and from magnetic resonance. 8% loss (ideally!) might not be much when you're charging your 0.007 kWh iphone battery. But it's huge when it's an 88 kWh Mach-e battery. On top of that, wireless charging on your phone in practice loses almost 50% of the power transmitted, and that's just trying to transmit it a couple millimeters.

The coil size is obviously limited to the size of the car, but to transfer large amounts of energy wirelessly efficiently, you will need coils much larger.

 

[dml105]

Current wireless car charging systems have about 94% efficiency compared to wired systems:
https://www.freep.com/story/money/c...ctric-cars-wireless-charging-pads/6428778002/

Tesla invented this stuff 100 years ago to avoid using high tension power lines where it would be beneficial to do so, and no one ever did it. The physics are well-understood at this point, so I'm having a very difficult time not being skeptical.

https://www.livescience.com/46745-h...the Tesla coil is,at least thousands of volts).

 

[Larry]

Current wireless car charging systems have about 94% efficiency compared to wired systems:
https://www.freep.com/story/money/c...ctric-cars-wireless-charging-pads/6428778002/

Good enough for me. I wish it was an MME option.

 

[AllenXS]

Was wondering how it could be done at speed. Have to be like a toll way to recover cost.
Super extended range.

 

[JamieGeek]

Will you also get a boost when driving over the coils to charge.

Then driving becomes more like Mario Cart then driving....weeeeeee.

 

[Larry]

Was wondering how it could be done at speed. Have to be like a toll way to recover cost.
Super extended range.

We know from “Plug and Charge” that a charger can ID an EV. So it could be an EZPass sort of thing where the car itself is the pass.

 

[ChasingCoral]

Home garage charging is probably not a great use case for inductive charging. The time saved is minimal and there is little concern about equipment vandalism. However, there are very valuable use cases for wireless charging in urban and suburban fleet operations.

For private vehicles, on street charging that is built into the road and curb eliminates cables and structures that can be prone to vandalism or tampering. Inductive charging may be a real benefit in urban environments where BEV owners park and charge on street.

An even stronger case is for electric buses and taxis. These tend to have long stops at fixed locations (bus bays at major stations and cab ranks at venues and mass transit stations). Installing inductive charging can allow these vehicles to easily recharge while waiting. In the case of buses, they can get a few minutes of high speed charging at major stops and even longer charging at stations where the drivers take breaks. Cabs can charge while sitting in a cab rank awaiting their turn to pick up the next customer.

Another case is for electric delivery trucks. Inductive plates at loading docks can mean recharging while loading and unloading. While cables are possible in these locations, there are real issues of cable management in environments where lots of trucks are parked at docks or bays.

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