Measuring internal resistance of a battery

Discussion in 'General Electronics Chat' started by soundman, Apr 16, 2011.

  1. soundman

    Thread Starter New Member

    Dec 27, 2010
    13
    1
    Does anyone know of an easy method of measuring the internal resistance of a battery?
     
  2. nsaspook

    AAC Fanatic!

    Aug 27, 2009
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    A quick way to get a rough value is to measure the voltage of the battery at two different fixed loads.

    Example:

    http://chdk.setepontos.com/index.php?topic=2622.0

     
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  3. someonesdad

    Senior Member

    Jul 7, 2009
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    The DC Load document here explains a little about it and references a battery manufacturer's recommendations.
     
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  4. nsaspook

    AAC Fanatic!

    Aug 27, 2009
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    Great link. I have the BK8500 at work. Now I have to write a PIC serial driver for it to test UPS batteries. :)
     
  5. Wendy

    Moderator

    Mar 24, 2008
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    This is not the forum you post this kind of thread, it should have been in the Electronic Chat forum. A moderator will be along shortly and move it I suspect.

    The feedback is feedback on the board, not for your learning.
     
  6. someonesdad

    Senior Member

    Jul 7, 2009
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    If you use python, there's a python library on their software page that makes it easy to talk to the instrument if you have the RS-232 to TTL serial adapter that comes with the instrument.
     
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