My ultimate EV dream - inductive charging

[CyberTruckeeTheOne]

Robotaxi, no plug

With summons, unsupervised FSD and roads all wired for inductive charging, you can technically fly to NY and command your CT to drive from San Francisco for your use in the state.

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[CyberZephyr]

I don't know if that news article/you know, but he clearly stated that the Robotaxi will have wireless charging. I can't wait!!!

 

[CyberTruckeeTheOne]

The question is how far will Tesla invest in the infrastructure to build the induction charger which I assume will be embedded on or along the road. And if it's just in major cities, will be ring fence the Robotaxi just like Waymo (for the moment although they are claiming it's just the regulations that's keeping from further expanding).

 

[Petertsai]

Wireless charging is very inefficient. Just note how the phone docking ports on the CT work or not work. That is only to charge a phone. Tesla will have do more work on that. It may be at location and a charging coils elevate to be close to car to make efficient charging. Transferring 200-500 watts per mile from road to car will be even more challenging.

 

[agordon117]

Wireless charging is very inefficient. Just note how the phone docking ports on the CT work or not work. That is only to charge a phone. Tesla will have do more work on that. It may be at location and a charging coils elevate to be close to car to make efficient charging. Transferring 200-500 watts per mile from road to car will be even more challenging.

This has been stated to use a different technology than phone chargers. Magnetic induction is for a phone. Magnetic resonance is for a car. It's more expensive tech that has a much higher efficiency across greater distances, supposedly close to the efficiency of a wire. But nobody uses it for phones because what we have now works fine for the use case of adding 4000mAh to a phone overnight.

 

[Woodrick]

The question is how far will Tesla invest in the infrastructure to build the induction charger which I assume will be embedded on or along the road. And if it's just in major cities, will be ring fence the Robotaxi just like Waymo (for the moment although they are claiming it's just the regulations that's keeping from further expanding).

It won't be embedded in the road.

It will be installed at specific charging locations. It's efficiency is problematic as well as the ability to do higher currents.
So you can expect the vehicle to pull into a specific spot, stop and charge for awhile.

 

[Petertsai]

This has been stated to use a different technology than phone chargers. Magnetic induction is for a phone. Magnetic resonance is for a car. It's more expensive tech that has a much higher efficiency across greater distances, supposedly close to the efficiency of a wire. But nobody uses it for phones because what we have now works fine for the use case of adding 4000mAh to a phone overnight.

Resonance is still magnet, just at higher efficiency. 4000mAh is 40 watt hour, assuming resistive load. I believe phone have batteries that are usually 40+ watt hours so about one hour+ to charge, not counting the BMS charging limits at low charge and at high charge, making it more than one hour.

 

[mongo]

Resonance is still magnet, just at higher efficiency. 4000mAh is 40 watt hour, assuming resistive load. I believe phone have batteries that are usually 40+ watt hours so about one hour+ to charge, not counting the BMS charging limits at low charge and at high charge, making it more than one hour.

What phone uses a 10V battery?
Most are single cell ~3.7V
S22 Ultra is roughly 5000mAh, 19 Wh.

Agree resonance is tuned inductance.

 

[agordon117]

Resonance is still magnet, just at higher efficiency. 4000mAh is 40 watt hour, assuming resistive load. I believe phone have batteries that are usually 40+ watt hours so about one hour+ to charge, not counting the BMS charging limits at low charge and at high charge, making it more than one hour.

Well, step 1 is coming at some point and will be compatible with our trucks. That will be level 2 wireless charging. 11.5kW is not 250kW, but it will be how we see where this is going.

But also, we don't know the master plan. It could be that they don't plan to clog the level 3 infrastructure with robotaxi at all, and they plan for it to only be capable of level 2 charging (or something like 50kW level 3).

 

[CyberTruckeeTheOne]

It won't be embedded in the road.

It will be installed at specific charging locations. It's efficiency is problematic as well as the ability to do higher currents.
So you can expect the vehicle to pull into a specific spot, stop and charge for awhile.

Read sometime ago that the aim is to embed induction charging along our roads.

That's my dream!

California had an experiment where they did it with magnets but more for self-driving keeping vehicles within their respective lanes.

 

[Woodrick]

It seems as if so many people are missing what's being done in the labs.
And let me reiterate in the LABS, not production, not cheap not easily repeatable

This Breakthrough Wireless EV Charger Reaches 100 kW Speeds With Near-Perfect Efficiency (insideevs.com)

 

[Petertsai]

Well, step 1 is coming at some point and will be compatible with our trucks. That will be level 2 wireless charging. 11.5kW is not 250kW, but it will be how we see where this is going.

But also, we don't know the master plan. It could be that they don't plan to clog the level 3 infrastructure with robotaxi at all, and they plan for it to only be capable of level 2 charging (or something like 50kW level 3).

11.5KW inductive charger will still need some serious work. How it will be initiated, how it does trickle charging and whether it will generate EMI or heats any magnetic material near it. We just have to wait to see more specifications. Does the CT have receiving coils?

 

[agordon117]

11.5KW inductive charger will still need some serious work. How it will be initiated, how it does trickle charging and whether it will generate EMI or heats any magnetic material near it. We just have to wait to see more specifications. Does the CT have receiving coils?

we have the ports to plug in the receiving coils. That's what the "diaper" is for under the rear bumper. When the wireless charging kit eventually comes out, the receiver will be a part of it

 

[mongo]

How it will be initiated,

Wireless communications, can be inductive, UWB, BLW, wifi...

how it does trickle charging

It (the inductive mat) doesn't need to, vehicle side still handles charge current.

and whether it will generate EMI or heats any magnetic material near it.

That is what I am most curious about, though an external iron partial sheild (U or E shape, open end facing vehicle) may cut stray field down significantly.

 

[CyberGus]

I would think the primary use-case for in-road inductive charging would be Boring tunnels.

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