Electronic battery tester with tailored compensation for low state-of charge

  • US 5,821,756 A
  • Filed: 09/26/1996
  • Issued: 10/13/1998
  • Est. Priority Date: 05/01/1992
  • Status: Expired due to Term
First Claim
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1. An electronic device for monitoring or testing a battery having one of a plurality of battery types associated therewith, comprising:

  • input circuitry for receiving information related to the type of the battery;

    dynamic battery parameter determining circuitry for determining an intermediate dynamic parameter of the battery;

    open circuit voltage sense circuitry coupled to the battery for sensing an open circuit voltage of the battery;

    correction circuitry coupled to the dynamic battery parameter determining circuitry, to the open circuit voltage sense circuitry and to the input circuitry which adjusts the determined intermediate dynamic parameter based upon the battery type information and upon a value of the open circuit voltage of the battery;

    output circuitry coupled to the correction circuitry for providing test results indicative of the condition of the battery, wherein the test results are provided as a function of the adjusted intermediate parameter.

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