When I saw the title I thought it was going to be the first deployment of the Qualcomm system featured on fullycharged[1] back in November. What they've actually done looks... kinda flakey.
World's first electrified road for charging vehicles opens in Sweden
31–40 of 104 posts
Re: World's first electrified road for charging vehicles opens in Sweden
#32This doesn't make much sense as an urban project, where chargers are close by, lane-switching is frequent, people are likely to be on the road, and which the article invites you to think about by comparing the cost to an urban tram. but it makes ton of sense for long-distance highway journeys, which is a problem that really needs solving before electric vehicles can be practical.
This is what the article states. They think the 20K km of highways would be more than enough and based on distance from smaller populated areas as little as 5K km.
Re: World's first electrified road for charging vehicles opens in Sweden
#33Re: World's first electrified road for charging vehicles opens in Sweden
#34I can’t help but be amused at the way people fear cell phone towers but love wireless charging devices
I'm sure people will fear this too. Driving by the same people who probably will make a ton of money speaking about how bad it is for you. Of course in both cases that science says there is no harm is best shouted down.
I would comment only about the wireless charging case: In medicine there is a wireless device to treat an aggressive form of brain cancer: TTFields. It is approved by the FDA [0]
It works by disrupting microtubules in the cell, a kind of micro-skeleton that gives its shape to the cell.
The TTFields electrical fields have a low frequency, very similar to the Qi wireless charging standard.
[0] https://www.accessdata.fda.gov/cdrh_docs/pdf10/p100034a.pdf
Re: World's first electrified road for charging vehicles opens in Sweden
#35I hope Sweden and Germany can make a common DIN Deutche industri normen standard for charging electric vehicles on roads. There would be an added benefit if we could build rail tracks among the electric guidance line. Rail tracks to lower the rolling resistance, metal on metal vs rubber on asphalt. We would then have a hybrid car rail track which should make it easy for autonomous driving. The aim would to bring down the total co2 emissions of transportation. Building both in ground and above ground electrification of cars would be the best system as then cars can charge during good weather conditions and trucks can always charge even during winter time. A system with electric guidance in the ground is a bit vulnerable to snow during winter times.
Here is another more rail like track which can be used by trucks but not by cars. https://www.scania.com/group/en/worlds-first-electric-road-o...
Rolling resistance coefficient c of rail c=0.001, dirty tram rails c=0.005, car c=0.02. Ie rails resistance is at least 25 times lower than rubber on asphalt 0.005/0.02. https://en.wikipedia.org/wiki/Rolling_resistance https://www.engineeringtoolbox.com/rolling-friction-resistan...
Re: World's first electrified road for charging vehicles opens in Sweden
#36Why is this considered "the world's first electrified road for charging vehicles"? Compared to https://www.wired.com/2013/08/induction-charged-buses/ for example. Does induction based charging not count as electrified? Is it that the Korean one was for their buses only, not general passenger cars?
"The world’s first electrified road that recharges the batteries of cars and trucks driving on it".
Well, that's a buss.
Jokes aside, the concept is quite old.
https://en.wikipedia.org/wiki/Trolleybus#History
Not easy to disengage though.
Re: World's first electrified road for charging vehicles opens in Sweden
#37I can’t help but be amused at the way people fear cell phone towers but love wireless charging devices
>I can’t help but be amused at the way people fear cell phone towers but love wireless charging devices
how do you know they're not a disjoint set?
Re: World's first electrified road for charging vehicles opens in Sweden
#38Earlier quoted context omitted.
Apparently they tested just that - Säll said: “There is no electricity on the surface. There are two tracks, just like an outlet in the wall. Five or six centimetres down is where the electricity is. But if you flood the road with salt water then we have found that the electricity level at the surface is just one volt. You could walk on it barefoot.” They also mentioned they turn off each segment if there is not a ca…
That's actually reassuring, I'm glad they looked into this. My follow-up concern is, what if, under these salty and wet conditions, something causes a short circuit between the powered rails? e.g., either a defective vehicle-side contact where the anode and cathode allow for the water and salt to close a much smaller gap, or if someone deliberately sticks a piece of metal on there.
You'll get a small steam explosion but there are lots of ways for the pressure to escape, and if the circuitry protecting the 50 meter stretch is fast enough that might not even happen.
Re: World's first electrified road for charging vehicles opens in Sweden
#39I hope Sweden and Germany can make a common DIN Deutche industri normen standard for charging electric vehicles on roads. There would be an added benefit if we could build rail tracks among the electric guidance line. Rail tracks to lower the rolling resistance, metal on metal vs rubber on asphalt. We would then have a hybrid car rail track which should make it easy for autonomous driving. The aim would to bring down…
Let's just only have train tracks? We can still have electric trucks for the last mile, but then they won't need electrified roads.
Long-distance goods transport with trucks is such a ridiculous concept, it's really time we just face it: it only ever made sense because the state funds the roads and road repair from general taxation, we have ridiculous subsidies for the fossil fuels that make it run and trains had the misfortune to be invented such a long time ago that the government has suffocated the industry.
Rolling resistance is somewhat of a rounding error, by the way. The big killer is aerodynamics: the power needed to push air out of the way increases quadratically with speed. But there is a cheat code: if you make the vehicle longer or add something to the back, it can ride in the slipstream. Only you can't make trucks very long at all because they need to work on public roads. Trains on the other hand can be made ridiculously long, saving massively on energy - multiple miles of wagons if you so wish.
Re: World's first electrified road for charging vehicles opens in Sweden
#40Sun can charge battery thru solar panels we all know that. Can Musk use his sattelites network to shoot down a precisely guided laser to charge your Tesla i.e. thru roof/hood made off of solar panels?