Ultra Caps?

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Re: Ultra Caps?

Postby swbluto » Sat Mar 07, 2009 5:18 am

317537 wrote:
I was able to locate a batch of reasonably priced (and VERY robust) Maxwell 70 uF 12,000 volt energy discharge capacitors. Each capacitor is rated at 100,000 Amperes/shot for 300,000 shots(!). I'm now redesigning the system so that it can deliver up to 24,000 Joules, or about 17,800 foot-pounds of energy per shot. This is about the same energy as dropping a one ton weight from a height of 9 feet!


Power capacity is all down to size. There must be a theoretical limit based upon size and area alone of any comparable cell or cap. A big battery will always carry more capacity.

Ouch this guys is crazy....

To tired to investigate more.


E = .5*.00006*(12,000)^2 = 4320 J ~ 1.2 Wh.

Lol. I wonder what the price is, though. At three dollars a piece, it might be worth it - now I just need 2000 of them.
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Re: Ultra Caps?

Postby Link » Sat Mar 07, 2009 7:08 pm

317537 wrote:Energy density or power capacity?


Power density, as in W/kg and/or W/l. And, ATM, that's really only because it's limited by the regulator on it. The raw capacitor is capable of way more than any kind of battery (except maybe one of those ridiculous 100C continuous/250C burst Saft li-ions).

In any case, anybody get anything more definite on when I can buy one? :D
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