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Method of determining a frequency interval containing a resonance frequency of a rechargeable battery

  • US 7,642,752 B2
  • Filed: 05/18/2007
  • Issued: 01/05/2010
  • Est. Priority Date: 05/29/2006
  • Status: Active Grant
First Claim
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1. A method of determining a resonance frequency interval containing a resonance frequency of a rechargeable battery, the method comprising:

  • applying periodic current or voltage signals of different frequencies in succession to at least one battery cell of the battery;

    measuring the temperatures of the at least one battery cell occurring for the different frequencies; and

    comparing the temperatures, and subsequent selection of a first frequency of the different frequencies as a first interval value of the resonance frequency interval and a second frequency of the different frequencies as a second interval value of the resonance frequency interval based on the comparison of the temperatures.

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