Batterey discharge characteristics calculation method and remaining battery capacity measuring device

  • US 5,592,094 A
  • Filed: 11/24/1995
  • Issued: 01/07/1997
  • Est. Priority Date: 11/25/1994
  • Status: Expired due to Fees
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First Claim
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1. A battery discharge characteristics calculation method achieved by using a sensing unit formed of a voltage sensor for use in detecting the terminal voltage of the battery connected to a load, a current sensor for use in detecting a current flowing through the load, and a temperature sensor for use in detecting the temperature of the battery to determine approximated discharge characteristics of the battery based on the detected voltage, current and temperature, comprising the steps of:

  • reading signals supplied from the sensing unit, the signals being indicative of the voltage, current, and temperature of the battery to be varied depending upon the variation of the load; and

    approximating the discharge characteristics in accordance with the variation of the load at a curved surface function formed on voltage, temperature, and duration of discharge axes, and substituting the detected current and temperature for the corresponding coefficients of the curved surface function to determine the approximated discharge characteristics at that given temperature on the voltage-duration of discharge axes.

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