High Voltage Super Capacitor
Written by Greg Allen   
Friday, 02 May 2008

Let’s talk tech talk:  High Voltage Super CapacitorA supercapacitor’s voltage profile (voltage vs. time) has two components; Capacitive and Resistive.  The resistive component represents the voltage change that is due to the Equivalent Series Resistance (ESR) and the capacitive component represents the voltage change due to the change in energy within the super capacitor.

 

Most applications require voltages that are much higher than what is just provided by one supercapacitor cell.. so it becomes necessary to combine a number of super capacitors together in a series to get to the required voltage level.  Putting supercaps in a series increases the ESR of the bank, however if the equivalent series resistance needs to be reduced, additional strings of super capacitors will have to be connected in parallel.  Energy storage, ESR, and temporal requirements are largely determined by a number of parallel connections that you have

 

The true sizing of a supercapacitor solution has to be done by taking into consideration various factors as voltage, current, and ESR.  Remember… the  smaller the super capacitor module - the better it is for many different applications.

 

I just got in from Atlanta, Georgia and I leave Sunday for Las Vegas, Nevada to talk and discuss supercaps.  I am going to sooo play some Vegas games.. wish me luck…

 

Greg

 

Readers have left 3 comments.
 No.1  Untitled
ultracaps in the market today have the efficiency of 80 or 90%.. a lead acid battery requires 30% more energy to charge than to store.. caps require much less. good point.
Guest (Unregistered) • 2008-05-02 20:59:24
 No.2  Untitled
Ultracaps have a very low energy storage density. thus all the above is true except they'd be empty by the end of the driveway. what we need is high voltage ultracaps. I found this blog while looking for advancements in the voltage level of ultracaps, sadly I could find none. Increasing the voltage dramatically increases the energy storage ability.
see here
http://www.tjtechnologies.com/research/uc/
Guest (Unregistered) • 2008-06-04 18:29:51
 No.3  high voltage cap
Have a look at http://en.wikipedia.org/wiki/EEstor

You might find it interesting
Guest (Unregistered) • 2008-06-05 08:24:25
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