Tesla Files Patents for Wireless Charging the Robotaxi

September 9, 2024

By Karan Singh

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.

New Castings Spotted at Giga Texas Likely Intended for Tesla Cybercab

April 21, 2025

By Karan Singh

@JoeTegtmeyer

Tesla’s Giga Texas factory usually gives us the first site of Tesla’s upcoming products. We first saw the Cybertruck and Model Y castings here. With Giga Texas being one of Tesla’s largest factories, it’s logical that most products would originate here.

Tesla has also stated that it intends to manufacture the Cybercab, Semi, the next-generation vehicle, and Optimus at Giga Texas over the coming years. The affordable vehicle and Cybercab were originally intended to be manufactured at Giga Mexico, but the plans for that facility were waylaid by changes in economic policy.

Robotaxi Castings

These new castings were spotted by Joe Tegtmeyer, who regularly does drone flights of Giga Texas. Joe pointed out that these castings don’t look like the usual Model Y or Cybertruck castings usually seen outside Giga Texas.

With an eagle eye, @minusYCore on X also spotted some interesting text on the frames holding the castings up. In particular, the castings say “RTTX050” and “W68-RSF AS-CAST”. These could be interpreted as ‘Robotaxi Texas’ and ‘Rear SubFrame.’ The as-cast portion indicates that these particular castings haven’t been trimmed yet, according to the X user.

The castings laid out.

@JoeTegtmeyer

The size and shape of these castings—combined with rumors that Tesla’s more affordable vehicle has been delayed—suggest they are intended for the Cybercab.

These castings are much flatter and appear to be a different size than the castings found elsewhere throughout Giga Texas, indicating that they are intended for a different product entirely.

It’s possible that these are the first castings used by Tesla to test their unboxed assembly process, which the Cybercab is expected to rely on. If you take a closer look at the video below, you’ll note that these new castings look very similar to the ones in the unboxed assembly video.

Interestingly, Tesla did say that they don’t intend to have the Cybercab available for customers before late 2026 or early 2027, but we’ll likely hear updated timelines as Tesla’s Q1 2025 Earnings Call tomorrow.

A more vertical look at the castings.

@JoeTegtmeyer

New Giga Presses

To top it all off, new parts for a Giga Press - the machine Tesla uses to make these castings - were also sighted in Texas. These machines are few and far between, and each one is highly specialized for the particular vehicle it produces. Seeing new parts coming in usually indicates that a new assembly line is under construction, or that changes are being made to an existing line to either expand it or update it.

There’s a lot happening and we will hopefully know more tomorrow evening.

New Giga Press parts

@JoeTegtmeyer

PepsiCo Building Additional Tesla Semi Chargers

April 21, 2025

By Karan Singh

Not a Tesla App

Tesla’s first large-scale partner for the Tesla Semi - PepsiCo - is building out another Semi Megacharger site per a recent filing found by MarcoRP. Building out these Semi charging sites is expensive due to their much higher power output when compared to Superchargers.

Name Change

Interestingly enough, Tesla appears to have shifted its terminology recently, now often referring to the Semi’s high-power charging solution as Tesla Semi Chargers instead of the previously common "Megachargers." Regardless of the name, these chargers are crucial for the Semi. They’re designed to deliver 1.2 megawatts of charging power capable of adding hundreds of miles of range in roughly 30 minutes.

Frito-Lay Site

The new site detailed in the recent filing will be located at a Frito-Lay production plant on Hageman Road in Bakersfield, California. Permits were filed just a couple of days ago for the installation of eight Tesla Semi Charger stalls along with their associated electrical equipment.

This facility adds to PepsiCo's existing network of chargers, supporting the Tesla Semis operating out of their Sacramento facility, and highlights Bakersfield as the next expansion of the Semi’s operational area. Notably, this new Frito-Lay charging site is strategically located just five miles (approx. 8 km) away from a massive future public charging complex Tesla is planning on Kelton Way.

Kelton Way Charging Complex

Tesla’s planned charging complex in Bakersfield, which is just down the road, will feature 72 Supercharger stalls, as well as 18 Semi charger stalls. According to pre-permits filed last month, this site will be fairly large and accessible to both the public and Tesla’s partners.

A rendering of the Kelton Way site - with the Semi Chargers on the outside, and the Covered Supercharger site in the center.

@MarcoRPi1 on X

Tesla plans to develop a vacant plot right off the interstate into a large charging hub, which is now the second major public Semi Charger site we’ve heard about. For now, these sites will remain rare, but we expect that Tesla and its partners will be happy to expand them out further as required.

Carson Semi Charger Site

These Bakersfield developments – both the private Frito-Lay site and the large public Kelton Way hub will help lay out the necssary infrastructure for the Tesla Semi, much like the early days of Tesla’s Superchargers. Since Semi cannot be charged at a Supercharger site (the MCS plug is notably different than NACS), these sites are a must-have.

Tesla's first publicly accessible Semi Charger site planned near the Port of Long Beach in Carson, California, was one of the first signs of these types of Semi Charger facilities being established - and like Kelton Way, it also includes amenities for truck drivers. Tesla is also considering what long, medium, and short-haul truckers need for their stays at these sites.

As Tesla works to ramp up production of the Semi itself, the parallel expansion of dedicated, high-power charging infrastructure by both Tesla and its key partners are essential to making electric heavy-duty trucking a reality.