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Old 03-20-2011, 09:23 PM
 
Location: Texas
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"This system that we have gives you capacitor-like power with battery-like energy," said Braun, a professor of materials science and engineering. "Most capacitors store very little energy. They can release it very fast, but they can't hold much. Most batteries store a reasonably large amount of energy, but they can't provide or receive energy rapidly. This does both."
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Old 03-20-2011, 09:27 PM
 
Location: Barrington, IL area
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Leave it to the people at UIUC to come up with something like this!
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Old 03-21-2011, 11:13 AM
 
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Very interesting work. The impact of this to the automobile industry would be huge. No longer would battery capacity be the limit for electric vehicles. Even though you would have to "fuel up" more often, there would be essentially no limit to your range.
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Old 03-21-2011, 09:13 PM
 
Location: state of enlightenment
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Quote:
Originally Posted by NJGOAT View Post
Very interesting work. The impact of this to the automobile industry would be huge. No longer would battery capacity be the limit for electric vehicles. Even though you would have to "fuel up" more often, there would be essentially no limit to your range.
Indeed that would be a game changer. The only thing holding back EVs is battery technology. If that's solved the lower maintenance, better performance, lower environmental impact would make it the dominant type of vehicle.
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Old 03-22-2011, 01:33 PM
 
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Those of you who think this will ever make it to the consumer market raise your hands.
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Old 03-24-2011, 05:33 AM
 
Location: Texas
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1.21 gigowatts!!!!!
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Old 04-03-2011, 06:20 PM
 
701 posts, read 659,592 times
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Quote:
Originally Posted by stan4 View Post
1.21 gigowatts!!!!!

HAHAHAHAHAHAHAHAHA!!!!!!!!!!!!!! One of my favorite films.


As to the OP article, that is truly amazing stuff, and something that would be a real game changer. If charging cut get down to timescales of seconds/minutes then focus could be diverted to bringing down the cost, per kwh, of electricity from the main power grids. Awesome tech that I look forward to seeing expanded, but there is that side of me that wonders how much of it will be suppressed by the will of big oil interests.
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Old 04-04-2011, 08:43 AM
 
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Capacitors charge quickly. They also discharge quickly. What is needed is a capacitor device that can store a lot of energy and that charges quickly but can discharge slowly (relatively speaking).

Think about a tank of gasoline in your car. It takes only 5 minutes to fill up the tank with energy, but you'll empty that energy over the course of 4 or 5 hours of driving. This assumes a vehicle with a 13 gallon tank that gets 25 mpg and that will be driven at 60 mph. In this example the ratio of discharge to recharge for gasoline is approximately 65 to 1.

The idea of using capacitors instead of batteries isn't new - it was talked about in the 1980's and I believe that a group of Australian scientists tried to patent such a device about 10 years ago.

I've always thought that the solution might be a circut board of micro-capacitors where the charge/discharge of each capacitor is controlled by a small integrated electronic switch. There would be one master control chip that would turn on all the switches for the charge cycle, then close all switches when all capacitors are charged. Then when a small amount of energy is needed the master control chip would signal the switches on charged capacitors to release the electrical charge one capacitor at a time but in rapid sequence. The master control chip would need to track whether its in the charge or discharge cycle and which capacitors out of possibly a million capacitors were charged or discharged. However, there's issues with the number of capacitors and switches needed, the requirement of nano-technology to get the number of capacitors and switches small enough to be practical, the issue of overheating of the storage device during the charging cycle and the possibility of catastrophic failure where the storage device empties all of its charge at once.
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Old 04-04-2011, 12:22 PM
 
701 posts, read 659,592 times
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Quote:
Originally Posted by djmilf View Post
Capacitors charge quickly. They also discharge quickly. What is needed is a capacitor device that can store a lot of energy and that charges quickly but can discharge slowly (relatively speaking).

Think about a tank of gasoline in your car. It takes only 5 minutes to fill up the tank with energy, but you'll empty that energy over the course of 4 or 5 hours of driving. This assumes a vehicle with a 13 gallon tank that gets 25 mpg and that will be driven at 60 mph. In this example the ratio of discharge to recharge for gasoline is approximately 65 to 1.

The idea of using capacitors instead of batteries isn't new - it was talked about in the 1980's and I believe that a group of Australian scientists tried to patent such a device about 10 years ago.

I've always thought that the solution might be a circut board of micro-capacitors where the charge/discharge of each capacitor is controlled by a small integrated electronic switch. There would be one master control chip that would turn on all the switches for the charge cycle, then close all switches when all capacitors are charged. Then when a small amount of energy is needed the master control chip would signal the switches on charged capacitors to release the electrical charge one capacitor at a time but in rapid sequence. The master control chip would need to track whether its in the charge or discharge cycle and which capacitors out of possibly a million capacitors were charged or discharged. However, there's issues with the number of capacitors and switches needed, the requirement of nano-technology to get the number of capacitors and switches small enough to be practical, the issue of overheating of the storage device during the charging cycle and the possibility of catastrophic failure where the storage device empties all of its charge at once.
Not sure if you read the article but the technology they are working on combines the benefits of capacitors and batteries. Their tech will allow batteries to charge in seconds/minutes.
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Old 04-04-2011, 10:25 PM
 
Location: Austin, Texas
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But a battery is a capacitor!
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