Re:Israeli systems that charge electric vehicles in 15 min t...
by kazinator on Sunday September 11, 2022 @04:55AM
(#32797984)
> When a vehicle comes to recharge, the spinning is slowed down to change that kinetic energy back into electrical energy and to flush it into the vehicle’s battery at such an intensity that the battery fully recharges in around 15 minutes.
Unless another car was there just before you?
This is not going to work in any location where cars queue up; it inherently requires a light duty cycle. Any high thoroughfare location will need to install many units.
> Of these, 61% were in the center of the country and, according to Weizer, most of them require anything from an hour to three hours to recharge a car battery fully. The number of ultra-fast 150-kilowatt chargers numbers just a few dozen, he said.
So if instead it takes three hours to charge a flywheel that can then dump the energy in 15 minutes, that's an 8% duty cycle for the best charging time.
So, of course, doh, it will have to be expensive to use these compared to slow charging. Drivers will pay not just for the convenience of the fast charge per se, but also pay a built-in "bugger off markup" which, through its price point, has the effect of deterring someone else from having taken the charge just before them.
Unless another car was there just before you?
This is not going to work in any location where cars queue up; it inherently requires a light duty cycle. Any high thoroughfare location will need to install many units.
> Of these, 61% were in the center of the country and, according to Weizer, most of them require anything from an hour to three hours to recharge a car battery fully. The number of ultra-fast 150-kilowatt chargers numbers just a few dozen, he said.
So if instead it takes three hours to charge a flywheel that can then dump the energy in 15 minutes, that's an 8% duty cycle for the best charging time.
So, of course, doh, it will have to be expensive to use these compared to slow charging. Drivers will pay not just for the convenience of the fast charge per se, but also pay a built-in "bugger off markup" which, through its price point, has the effect of deterring someone else from having taken the charge just before them.