Tesla Files Patents for Wireless Charging the Robotaxi

Not a Tesla App

Tesla has filed four patents for wireless charging. Previously, Tesla acquired the experience and skills of Wiferion’s engineering team in an acquisition in June 2023. Tesla quickly sold off the company but kept the company’s engineers. This was an acqui-hire, where large companies rapidly onboard top talent by purchasing a company for human capital, rather than products, services, or intellectual products.

Following the Wiferion acquisition, Tesla showed off a wireless charging mat several times and even confirmed they are working on wireless inductive home charging. We expected this to arrive with the Cybertruck, but now we hope to see more details at the upcoming Robotaxi reveal event in October, at the Warner Bro.’s studio in Hollywood.

Wireless Charging Patents

First Patent

The first of the four patents looks at temperature sensors and applications for wireless charging. Tesla intends to track the temperatures across both the wireless charging pad, as well as the inductive charging coils in the vehicle. The third patent details how they’re planning to use this in an innovative way.

WIPO

Second Patent

The second patent is a shorting switch, which is designed to prevent or reduce leakage of energy to ground sources near the wireless charging mat. This shorting switch is used to create a short with the receiving side of the inductive charging, essentially making energy transfer faster and more efficient – while also reducing the amount of energy that is leaked out elsewhere. We’ll leave this one for the electrical engineers to explain in our forums.

Third Patent

The third patent is actually the wireless charging circuit itself, and how to manufacture it. This one is straightforward and explains how Tesla intends to design and build the prototype inductive wireless charging mats. Beyond the basic design, this document also details how Tesla intends to lay out the inductive charging coils and how it expects the entire assembly to function – which includes a small cable that runs to a wall-mounted energy source.

Fourth Patent

The final patent is for intelligently estimating and adapting to variations in wireless charging layouts and systems. This one is probably the most interesting of the four patents, as it involves adjusting the coils in the mat to dynamically account for the positioning of the vehicle, as well as responding to the information from the first patent – the temperature sensors.

Essentially, by varying the coil induction across the mat, Tesla intends to dynamically aim the wireless charger at different parts of the inductive coils in the vehicle, thereby reducing heat. This patent will also help Tesla to determine the adequate charge speed and other key information they may need to relay to the vehicle, or back to fleet management software.

Cybertruck Inductive Charging

While the Cybertruck never actually arrived with inductive charging, it was noted in the Service Manual to have 2 Inductive Charging Headers, so it is ready to be upgraded to have Inductive Charging support. We expect that Tesla will release this as a purchasable upgrade for the Cybertruck sometime in the future – likely as a package with the Inductive Charging Mat.

Robotaxi Inductive Charging

The Robotaxi will likely be the first of Tesla’s vehicles to feature inductive charging – which. makes sense given its autonomous nature. Plugging in a NACS charger will likely be fairly difficult to automate, and the 5-10% efficiency loss of wireless charging isn’t a huge deal. It’s possible Tesla chose this route due to cost, as having an automated NACS cable like the “snake” prototype we saw years ago could be costly.

Having a simple parking stall with an inductive mat on it, alongside all the tech and supplies needed to automatically clean and sanitize the Robotaxi makes far more sense. This means that a Robotaxi will be able to roll in, charge and clean itself, and then roll out to go pick up more customers. Tesla is planning a super-efficient system here that requires minimal intervention from real humans.

Essentially, by effectively managing the Robotaxi fleet, Tesla can offset the increased time that wireless charging would take, and also reduce the amount of waste energy by charging when energy is cheapest. While this could prevent Tesla from taking advantage of the sheer battery mass of a Robotaxi fleet – by selling power when it’s expensive and travel demand is low – this doesn’t make it impossible.

Smartphone manufacturers have demonstrated reverse wireless charging with the inductive charging coils already present in modern smartphones. We could see Tesla low-power bi-directional charging in the future too.

We’re looking forward to seeing Tesla unveil this at the upcoming Robotaxi event. It’ll be something special, for sure.

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Tesla Says 12V Power Socket Access Will Not Return With Sentry Mode

Not a Tesla App

It turns out that the big undocumented change in Tesla update 2024.32 that disables the 12V power and USB ports while Sentry Mode is active is not a bug but an intentional change.

A fan contacted Tesla Service to see if the change was intentional and what the reason behind the change was. Surprisingly, they received a response pretty quickly.

No 12V Power Access

Tesla has decided to restrict 12V power access for safety reasons—namely, to “reduce the likelihood of thermal events” when third-party devices are left powered on without users present. Tesla reached out to the fan in question by phone, and they seemed to be sticking to that line.

It seems that Tesla is resolute that it was due to safety reasons and that the change would not be “fixed” or allowed in a future software update – as this was an intentional change for safety reasons.

Other sources have reported that the change was due to potential misuse of the 12V power access, with people wiring 1200w microwaves and kettles or jury-rigging 240v to 120v adapters, which had apparently been the cause of multiple fires in Tesla vehicles within China.

Workarounds

There are a couple workarounds, although neither are ideal. You can tap in to the vehicle’s 12v line directly to power your accessories, or you can use Camp Mode.

If you choose to enable Camp Mode, then you’ll need to manually lock the car from the app since walk-away door locking is disabled with Camp Mode. However, Camp Mode will use extra energy to keep the climate system enabled.

We’re still hoping Tesla considers bringing the Cybertruck’s Power Control menu to the rest of its vehicles and is somehow able to limit the max draw from these outlets to prevent dangerous situations.

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Join Our Tesla Robotaxi Event Prediction Contest

Tesla

With the Robotaxi event just a day away, we thought it would be a fun idea to run a contest to predict what Tesla will announce tomorrow evening.

We’ve outlined a list of questions below; simply answer them on our forums or social media (X or Threads), and be entered for a chance to win some great prizes.

The individuals who have the most correct answers will win one of five prizes mentioned below. If more than five people get them all right, a random drawing will be held from the pool of winners.

We’ll reach out to the winners either by email or by DM on social media.

The Questions

1. Will Tesla let attendees experience Robotaxi at the event?

2. Will Tesla first start the network with human supervision (ridesharing), or with Robotaxis only?

3. What year will the network start? When will it become fully autonomous? (if announced)

4. When will Robotaxi production begin? (if announced)

5. Will it be Robotaxi or Cybercab?

6. Which of these Robotaxi Concepts will be the closest to the one announced?

7. Will Robotaxi include:

   1. Front-facing camera?

   2. Stainless-steel body?

   3. Steer-by-Wire or No Steering Wheel? (if announced)

   4. Which current Tesla model has the most similar door-opening mechanism?

   5. How many seats will the robotaxi have?

8. Will the robotaxi include AI5/Hardware 5, HW4 or something completely different?

9. Where will Tesla’s first Rideshare/Robotaxi location be established?

10. Will customers be able to purchase a Robotaxi?

Requirements

Please use the template below to answer the questions on social media or in our forums. You can post your answer as a comment to our forums, to our X post, or to our Threads post.

Once you do that, repost or quote post your favorite article from us.

1. Yes

2. Ridesharing

3. 2025/2027

4. 2025

5. Cybercab

6. Dominic's

7. Yes, Yes, SBW, No, 2

8. HW5

9. LA

10. Yes

Prizes

Prizes are generously provided by Enhance and Jowua, makers of some of the best Tesla accessories and amazing Tesla community members. Prizes will be mailed out directly by them. Winners will get to choose their prize from the list below. First place will have the first pick and so on. There will be five winners in total.

• S3XY Buttons (including a commander and wiring)

• S3XY Knob for Model 3/Y

• Tesla Gaming Controller - Multi-Device Wireless Controller (Wireless Charging)

• Tesla Gaming Controller - Multi-Device Wireless Controller (Wireless Charging)

• Tesla Gaming Controller - Multi-Device Wireless Controller (Wireless Charging)

Disclaimer

This is a Tesla event, and Tesla normally likes to hold their cards close to their chest. If an answer is ambiguous, we’ll go with the best choice decided by our staff. We’ll do our best to be fair. This

With all that said, we wish our entrants the best of luck, and we’ll announce the winners at the end of the week.

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