Posted on 07/23/2015 9:23:04 PM PDT by 2ndDivisionVet
In other words... I ain’t buyin it!!!
They simply suspended unicorn farts in a solution of happy thoughts.
Good questions. If it eve3r materializes they will have to address that. Graphene is not mass produced anyway. Once it is things like this will be possible but first they have to figure out a cheap reliable way of producing graphene out of the laboratory.
Thanks, @2ndDivisionVet.
@Jim Robinson — think this stuff might prove handy for recharging between ZOTs? ;-)
I’m a big fan of miracle substances. Always have been. In ancient days there was the Philosopher’s Stone which could turn lead into gold, confer immortality, etc.
In modern days there’s graphene, which can cure halitosis and alopecia, as well as make the latest generation of miracle batteries via miracle capacitors.
It’s just a matter of moving from the lab to production after working out the kinks in the “manufacturing processes”. And if it doesn’t work out to well, then the guy who scammed, uh, I mean utilized all of the money from the suckers, uh, I mean the investors, can always resign “to spend more time with his family”.
Dr Watson, by jove you got it!
100 miles worth of battery charged in 4 minutes?
In other words 2 hours to 4 minutes ratio? = 30
In other words the power required to charge the battery will be 30 times that of the electric motor. If the motor is running on 15 amperes and 24 volts,
the charger would need to push 15 x 30 x 24 / 110 = 98 amps at 110 volts, assuming 100% charger efficiency.
That is a lot of juice....will need might big power cables.
The S. Korean is working on miniature size capacitors.
Expanding that to real world needs is another thing.
I would not buy stock in any outfit dreaming of this.
zaaaap! Death!
“It is likely that a refined version of the supercapacitor will exceed lithium-ion batteries’ storage capacities in due course.”
Well, OK then. If you say so.
Head engineer Sum Ting Wong had no comment.
Seriously, now, will this mean I can recharge my Makita drill in three seconds? That'd be nice, but I remain skeptical...
I think this is way cool. Looks like the major impact being looked at is cars. I see something better: redundancy and smoothing peak loads to allow cheaper generation and for off grid storage. Get batteries cheap enough and why do you need a backup generator?
That is far from a typical electric car motor.
The Nissan Leaf uses 80 kW motor.
a http://www.nissanusa.com/electric-cars/leaf/versions-specs/
98 amps at 110 volts
Your example is a 0.36kW Motor Load. Multiply your number by 222. Perhaps only half that for average motor load depending on low speed city or more with high speed plus AC, etc.
Then add power for the inefficiencies of the charge, battery and inverter.
Way more power than you were imagining is required.
That is impressive.
How long can it hold that charge compared to a battery?
More tricks than that required to make supercaps work economically for the residential driver.
Would you like a car that loses half the energy stored in the "fuel tank" if it sets for a week?
They find your head in the back seat, or find a black husk that appears to have been struck by lightning?
But I would think that dumping that many btu’s of energy into a capacitor in a minute or two would melt even a VERY fat wire bundle.
I simply made a very conservative assumption on the KW used by an electric car. I totally believe your number of 80 KW.
Which makes the 4 minute charging time story even a bigger fraud. There is no house or charging station capable of handling that kind of power load. These folks believing these cockamamie stories are obviously not educated engineers.
house hold charge no way , commercial grade power not so difficult. Commercial high voltage retail supply can be had at 4800 volts three phase AC this is a common standard to a number of industries and handled safe and effectively every day by the. think electric motors of 1000 horsepower used every day in mills and manufacturing industry. To fully charge a 100 KwHr pack in 4 min takes a charge rate of 15C. rectifying 3 phase AC to DC means each phase must bear a 5C rate. 5C of 100kw at 4800v is 500kw per phase sounds like a lot but at 4800v thats ruffly 105amps of current. there are some fast charge 12volt DC jump start that Wal-Mart sells that push 200 amps the current is the same its voltage that matters. 4800 volts is used around the world every day as a matter of industrial practice.
sorry got cut short, for a 15c charge at 4800v you need only 315 amps thats not a unreasonable amount of commercial current. I personally have seen 500 amp 4800v hook ups for the mining industry. a light rail power substation for a few km of track routinely run 1500v DC at 1000+ amps here in Dallas for our light rail sending that power over a 1/2” cable on the panthograph. using the rails as the ground return path. while no home charger is ever going to push more than 100amps at 240v single phase ac. commercial power can be had at upwards of 15000v three phase , 4800v 3 phase, 2400v ect these are transformer multiple of the fundamental supply voltage of 240v. 120v is made by using a split auto transformer on 240v from the power pole. the ac distribution system is all 15000v plus from the pole to the station.
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