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To: Wurlitzer

You completely missed my point.

The main flaw in batteries is not the number of charges the batteries can take... it’s how long it takes to charge the battery in the first place (not saying that the number of charges isn’t another problem, but it’s less of a problem than the 8-16 hour charge time).

Capacitors have charge times less than the standard time it takes to fill up a tank of gasoline. Thus the main problem of electric cars and their batteries are eliminated.

There are problems with capacitors, like I said, but considering how long batteries have been around... and their slow rate of progress, we might want to consider just how far we could go with capacitors instead.


23 posted on 02/20/2012 12:54:27 PM PST by gogogodzilla (Live free or die!)
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To: gogogodzilla

“You completely missed my point.”


No my FR friend I did not. The Edison battery can be charged faster and without damage than other batteries on the market. Not as fast as a capacitor but faster than batteries.

Yes it would be a real challenge to charge any currently known battery technologies as fast as you can charge a capacitor but we again fight the old T=RC problem during drive time.

For example lets say a magic electric car only requires 1 HP or 796 watts and lets say it is a 240 volt motor. So if the motor is 100% efficient it will require 3.31 amps therefore the effective resistance (I won’t get into inductance) the capacitor sees will be ~72 ohms.

Now lets back into what we will need for a 30 mile range at 60 MPH to make the numbers easy (1 gallon of gas equilv.)

To have 60% energy left in the capacitor after that 30 mile minute trip we will need the following for our T=RC equation... T=1800 seconds, Resistance is 72 ohms therefore we will need a 25 Farad capacitor with at bare minimum 240 volt capacity. Check out how much that puppy will cost. AND AGAIN this is for a 1 HP car good luck getting a 1 HP car up to 60 MPH.


28 posted on 02/20/2012 3:50:39 PM PST by Wurlitzer (Welcome to the new USSA (United Socialist States of Amerika))
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