3 ms·

This is an absolute waste of weight and nothing more than a presser tech demonstrator. Given induction's fundamental (physics) limitations, there's zero chance

This is an absolute waste of weight and nothing more than a presser tech demonstrator. Given induction's fundamental (physics) limitations, there's zero chance this will make it into a production vehicle. The energy storage requirements and practical charging speed of a car are not remotely the same as for a portable electronic device such as a phone. Human passenger EV charging will always be through a direct cable connection. If you want something even faster, just do an automated physical battery swap and design the car's physical safety envelope and grounding systems around this additional access affordance.

breve 1y ago
> There's zero chance this will make it into a production vehicle Wireless charging is in production. Here's one example: https://electrifynews.com/news/auto/enc-electric-bus-now-feature-inductev-wireless-charging-no-cables-no-downtime/ https://electrifynews.com/news/auto/enc-electric-bus-now-fea... Wireless charging can be as efficient as wired charging: https://www.youtube.com/watch?v=AE1gaNO9nj0 https://www.youtube.com/watch?v=AE1gaNO9nj0 https://www.pcmag.com/news/wireless-ev-charging-tests-achieve-breakthrough-96-efficiency https://www.pcmag.com/news/wireless-ev-charging-tests-achiev...
- spookie 1y ago
  This type of design (polyphase) is inherently even harder to align to achieve that level of efficiency, and misalignment throws the efficiency downward even faster than a simple coil. Wish I could link the research but it is behind a paywall. But a simple search on scopus and the like should suffice. Of course, you could have some driver aid informing them how to better align themselves. But still, you will always waste energy in practice, and at the scale of automobiles out there it becomes unreasonable, no?
  - breve 1y ago
    No. If you're capable of aligning your car to a parking space, you're capable of using wireless charging.
- calmbonsai 1y ago
  CAR! Not bus. Apples vs Oranges. Also, that "efficiency" measurement is not overall Pout/Pin. It's merely measure of charging speed and they do touch on that mentioning the lack of a "break-out box" etc. to determine the actual numbers. One can absolutely achieve the same charging speed with induction charging, but with a much higher power input and at a greatly reduced vehicle efficiency due to the much higher on-vehicle mass dedicated to charging the battery. This is also a bit of rigged game as they're using the oldest wired-charging infrastructure against the latest wireless. They do touch on that. The older wired standard has a much lower power-factor duty-cycle. That said, it, otherwise, was a good test as they also took into consideration ambient temperature and battery heater.
toast0 1y ago
> Given induction's fundamental (physics) limitations, there's zero chance this will make it into a production vehicle. > Human passenger EV charging will always be through a direct cable connection. Induction charging made it into production vehicles in the past [1], so always is a little bit too strong. [1] https://en.m.wikipedia.org/wiki/Magne_Charge https://en.m.wikipedia.org/wiki/Magne_Charge
- calmbonsai 1y ago
  You're correct. I should've worded as mass-production.

breve 1y ago

> There's zero chance this will make it into a production vehicle Wireless charging is in production. Here's one example: https://electrifynews.com/news/auto/enc-electric-bus-now-feature-inductev-wireless-charging-no-cables-no-downtime/ https://electrifynews.com/news/auto/enc-electric-bus-now-fea... Wireless charging can be as efficient as wired charging: https://www.youtube.com/watch?v=AE1gaNO9nj0 https://www.youtube.com/watch?v=AE1gaNO9nj0 https://www.pcmag.com/news/wireless-ev-charging-tests-achieve-breakthrough-96-efficiency https://www.pcmag.com/news/wireless-ev-charging-tests-achiev...

spookie 1y ago
This type of design (polyphase) is inherently even harder to align to achieve that level of efficiency, and misalignment throws the efficiency downward even faster than a simple coil. Wish I could link the research but it is behind a paywall. But a simple search on scopus and the like should suffice. Of course, you could have some driver aid informing them how to better align themselves. But still, you will always waste energy in practice, and at the scale of automobiles out there it becomes unreasonable, no?
- breve 1y ago
  No. If you're capable of aligning your car to a parking space, you're capable of using wireless charging.
calmbonsai 1y ago
CAR! Not bus. Apples vs Oranges. Also, that "efficiency" measurement is not overall Pout/Pin. It's merely measure of charging speed and they do touch on that mentioning the lack of a "break-out box" etc. to determine the actual numbers. One can absolutely achieve the same charging speed with induction charging, but with a much higher power input and at a greatly reduced vehicle efficiency due to the much higher on-vehicle mass dedicated to charging the battery. This is also a bit of rigged game as they're using the oldest wired-charging infrastructure against the latest wireless. They do touch on that. The older wired standard has a much lower power-factor duty-cycle. That said, it, otherwise, was a good test as they also took into consideration ambient temperature and battery heater.

toast0 1y ago

> Given induction's fundamental (physics) limitations, there's zero chance this will make it into a production vehicle. > Human passenger EV charging will always be through a direct cable connection. Induction charging made it into production vehicles in the past [1], so always is a little bit too strong. [1] https://en.m.wikipedia.org/wiki/Magne_Charge https://en.m.wikipedia.org/wiki/Magne_Charge

calmbonsai 1y ago
You're correct. I should've worded as mass-production.