Electronic battery tester

  • US 6,781,382 B2
  • Filed: 12/05/2002
  • Issued: 08/24/2004
  • Est. Priority Date: 12/05/2002
  • Status: Active Grant
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First Claim
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1. An electronic battery tester for testing a storage battery, comprising:

  • a first Kelvin connector configured to electrically couple to a first terminal of the battery;

    a second Kelvin connector configured to electrically couple to a second terminal of the battery;

    a source configured to apply a time varying forcing function to the battery through a first conductor of the first Kelvin connector and a first conductor of the second Kelvin connector;

    a sensor electrically coupled to a second conductor of the first Kelvin connector and a second conductor of the second Kelvin connector configured to sense a response of the storage battery to the applied forcing function and provide a response signal;

    an analog to digital converter configured to digitize the response signal; and

    processing circuitry configured to convert the digitized response signal into a plurality Fourier components, and to determine noise in the response signal from a subset of the plurality of Fourier components, and responsively provide an output related to presence or absence of noise in the response signal.

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