Apparatus and method for simulating a battery tester with a fixed resistance load

  • US 7,595,643 B2
  • Filed: 08/21/2006
  • Issued: 09/29/2009
  • Est. Priority Date: 11/11/2003
  • Status: Active Grant
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First Claim
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1. A battery testing method that is based on battery rating standards, the method comprising:

  • (a) measuring a dynamic parameter of the battery;

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

    (c) obtaining a temperature of the battery;

    (d) setting a predetermined load resistance value;

    (e) estimating a full charge dynamic parameter and a full charge open circuit voltage of the battery;

    (f) estimating a load voltage of the battery as a function of the estimated charged battery dynamic parameter, the charged open circuit voltage of the battery, the load resistance value and the temperature of the battery;

    (g) predicting a full charge bounceback voltage; and

    (h) utilizing the full charge bounceback voltage and the load voltage to rate the strength of the battery,wherein bounceback voltage is a change in voltage after the battery is initially released from a load until a later time, andwherein predicting the full charge bounceback voltage comprises determining the full charge bounceback voltage without subjecting the battery to a high load.

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