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Method and device for determining characteristics of an unknown battery

  • US 7,692,410 B2
  • Filed: 03/14/2007
  • Issued: 04/06/2010
  • Est. Priority Date: 03/14/2006
  • Status: Active Grant
First Claim
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1. A method of determining a rate of charge/discharge, C rate, of a battery having unknown characteristics comprising:

  • applying at least a two-pulse current load to said battery;

    measuring a change in voltage, Δ

    V, only resulting from the application of one of the second or a subsequent pulse,wherein said change in voltage is substantially equal to the difference between an open circuit voltage of the battery prior to the application of the second or subsequent pulse and a loaded circuit voltage resulting from the application of the second or subsequent pulse; and

    determining the C rate of the battery as a function of Δ

    V.

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