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Charging Supercapacitor

Discussion in 'General Electronics Discussion' started by zdillman, Jul 26, 2012.

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  1. zdillman

    zdillman

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    Jul 26, 2012
    Hi, I bought a supercapacitor and I was wondering how I could charge it fast. The supercapacitor is a 2.5v 2600 Farad capacitor. My question is, do I have to charge it at 2.5 volts or can I charge it using a higher voltage. I have a low voltage power supply but it can't put out too many amps and it charges it dreadfully slow at 2.5 volts. Thanks!
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    You can charge it from any voltage source as long as you use a resistor to limit the current AND you stop the charging process BEFORE the voltage hits 2.5V. Once you go over 2.5V you may own a DEAD 2.5 capacitor
     
  3. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

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    The rate at which energy can be put into a capacitor or supercapacitor is directly proportional to the current that you can feed into it.

    If you have a higher voltage at a low current, you could use a switching power supply to step the voltage down and in the process, step the current up. But if your supply can only deliver a low voltage and a low current, you can't charge your capacitor any more quickly.
     
  4. GreenGiant

    GreenGiant

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    Feb 9, 2012
    see bold portions there.

    if it is in fact a 2600 FARAD capacitor anything is going to take a while to charge it, thats the nature of the beast really, you have to look at how much energy is being stored here, thats going to take a while to dump that much (8125 Joules)

    Because no one has asked yet....
    Why do you have a 2600 Farad capacitor?!?!
    And how big is it?!?!
     
  5. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Probably like this.
     
  6. BobK

    BobK

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    Wow, charge and discharge at 600A in 0.3 seconds.

    Bob
     
  7. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

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    And an ESR of 0.9 milliohms! And I used to think that 4000 uF at 60V made a big bang :)
     
  8. BobK

    BobK

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    Jan 5, 2010
    I think you could jump start your car from 5 of these in series.

    Bob
     
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