Electronic battery tester configured to predict a load test result based on open circuit voltage, temperature, cranking size rating, and a dynamic parameter

  • US 7,723,993 B2
  • Filed: 09/02/2003
  • Issued: 05/25/2010
  • Est. Priority Date: 09/05/2002
  • Status: Active Grant
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First Claim
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1. A method of testing a storage battery, comprising:

  • (a) measuring a dynamic parameter of the battery using a low alternating current signal;

    (b) obtaining an open circuit voltage of the battery;

    (c) measuring a temperature of the battery;

    (d) obtaining a cranking size rating of the battery; and

    (e) estimating a load test voltage of the battery as a function of the measured battery dynamic parameter, the obtained open circuit voltage of the battery, the measured battery temperature, an activation voltage, which is calculated based on the measured temperature of the battery and the obtained open circuit voltage, and the cranking size rating of the battery, the estimated load test voltage indicative of power remaining in the battery.

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