Electronic battery tester

  • US 6,392,414 B2
  • Filed: 06/07/2001
  • Issued: 05/21/2002
  • Est. Priority Date: 01/13/1997
  • Status: Expired due to Term
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First Claim
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1. An apparatus for testing a battery comprising:

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

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

    a signal source configured to apply a signal pulse to the battery through the Kelvin connections;

    a voltage sensor configured to measure a voltage related to a voltage across the battery; and

    a microprocessor configured to calculate a quiescent operating voltage of the battery and determine a condition of the battery based upon the signal pulse and the quiescent operating voltage of the battery, the quiescent operating voltage a function of voltage measured by the voltage sensor.

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