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Porsche's New Cayenne Will Charge Itself Like No Other EV:
Those who closely follow electric cars will have heard whispers of wireless charging for a while now. And if you're not an EV aficionado, you've probably wondered why it hasn't happened. Well, that's all about to change. Porsche announced on Thursday that it's rolling out wireless charging on the upcoming all-electric Cayenne later this year.
The goal is to put an end to wrangling thick and bulky charging cables. Instead, Porsche is stepping in as the first electric car maker to offer wireless charging that's actually going into production.
Porsche's inductive charging system delivers up to 11kW with around 90% efficiency, which is on par with traditional wired AC charging. But unlike most EV solutions that involve a jungle of wall-mounted boxes, Porsche's setup requires just one unassuming floor plate in your garage or driveway. Given that Porsche says roughly 75% of electric charging happens at home, it's not hard to see the appeal.
This one-box system does away with the wall box and bulky control units, making the process look effortless. Just park your Cayenne Electric over the slab, and you're good to go. The car even lowers itself slightly to align with the plate -- which makes charging as efficient as possible.
Many startups have tried and failed to make wireless charging for EVs happen over the years, said Antuan Goodwin, CNET's senior cars writer. "Challenges that have kept the tech from widespread adoption include: fragile hardware (it will be run over by drivers), alignment issues, energy losses that make it significantly slower than plugging in or excessive/dangerous heat generation from sending high amperage over air."
Porsche thinks it's managed to overcome these roadblocks. The system works via a transmitter coil embedded in the base plate and a corresponding receiver in the vehicle's underbody, sandwiched between the front wheels. It transfers energy using a magnetic field over a gap of a few centimeters, and it has all the safety features you'd expect: motion sensors, object detection and a big red pause button.
The Cayenne Electric, which will be the first to offer this tech, is due for its release later this year. As for the floor plate, it will go on sale in 2026 through Porsche Centres and online. Pricing hasn't been detailed yet, but expect it to land at the premium end.
(Score: 2) by ElizabethGreene on Monday September 08, @02:29PM
The really obvious way to improve efficiency is to put a mechanism in the floor pad that pushes it up against the receiver in the car. If it could scoot around to accommodate less than perfect alignment, that would be even better.
It's hot in my garage, and charging at 240V/48A =~ 11KW. If this kit is 90% efficient, it's still dumping 1KW as heat. That's a decent hair dryer of waste heat, running continuously, whenever the vehicle is charging.