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Difference between Ultracapacitors and Batteries PDF Print E-mail
Written by Greg Allen   
Thursday, 23 October 2008
It's been an exciting time in this industry lately.  We have been very busy assisting with different request.  I have had several companies ask us to add a "news section" to this site and we have this up and running. This will be a great place for press releases. Charge CycleIf your company has a press release, please send it to us and we will post it for you.

Also.. We have been getting a few questions about replacing batteries with ultracapacitors. Currently, that is not an option. Capacitors need a place to charge and they will have very high power for a short duration of time. Here are a few highlights of the differences between batteries and ultracapacitors.

  • Charge Cycles: Ultracapacitors can be charged and discharged hundreds of thousands (and millions) of cycles without losing performance. A battery is only good for a limited amount of charge and discharge cycles. You probably notice this now with your cell phone or if you have a cordless phone at the house. The longer you have and more you use the less effective the battery holds the charge.
  • Charging Time: As we know, batteries rely on chemical reactions and take more time to charge...unlike ultracapacitors which charge and discharge very quickly.
  • Size / Weight: Batteries are larger and more heavy where ultracapacitors tend to be smaller and lighter.
  • Energy Density: Typically ultracapacitors hold one fifth to one tenth the energy of an electrochemical battery. This will be changing though as the development of ultracapacitors continue.
  • Energy Release: Batteries release energy on a slower longer period of time while capacitors release stored energy very quickly. For a electric vehicle, this quick burst will give the energy needed for passing other cars or going up a hill.
Readers have left 4 comments.
 No.1  Untitled
There is a relatively new ultracap on the Web, offered by a Company called: "1st Lighten the Load". This company claims a new construction method for cheap ceramic ultracaps. Most importantly, it claims that the structure is "self healing", therby protected from meltdown. Can antone shed any light on this feature, and whether its necessary, essential etc for all ultracaps ?
Naoris (Registered) • 2008-10-26 15:54:31
 No.2  Untitled
Well, not essential, but certainly desirable! A shorted ultra cap could be a nasty thing! Most capacitors have no self healing ability. Mylar or other metalized film are about it. Leaky electrolytic capacitors, to a very limited extent - can be reformed. Regular ceramic capacitors have a nasty habit of exploding in a violent way (in certain applications), so if they can make a self healing ceramic super/ultra capacitor then that would be a worthy accomplishment indeed!
Antonm (Unregistered) • 2008-10-31 18:28:59
 No.3  BTW
Leaky electrically that is! If an electrolytic cap leaks electrolyte there is no hope.
Antonm (Unregistered) • 2008-11-01 08:35:28
 No.4  none
when are they going to invent this ultra capacitor that can power a car for 300 or 400 miles on a charge and propell it to 80 MPH and have the torque needed for hills and carrying weight
Guest (Unregistered) • 2009-01-03 18:55:34
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