×

Estimation Method for Residual Discharging Time of Batteries

  • US 20110260692A1
  • Filed: 11/18/2010
  • Published: 10/27/2011
  • Est. Priority Date: 04/22/2010
  • Status: Active Grant
First Claim
Patent Images

1. An estimation method for a residual discharging time of batteries, comprising the steps of:

  • A. setting a plurality of battery-discharge-current intervals and battery-discharge equations thereof, each of the battery-discharge equation corresponding to the associated battery-discharge-current interval, further setting discharge time of each of the battery-discharge-current intervals zero;

    B. detecting a discharge current, a discharge time and a discharge voltage of the batteries;

    C. judging whether the discharge current exceeding all of the battery-discharge-current intervals, terminating the whole procedure if the discharge current exceeding all of the battery-discharge-current intervals;

    D. selecting one of the battery-discharge equations corresponding to the associated battery-discharge-current interval according to the detected discharge current;

    E. calculating the residual discharging time of the batteries;

    F. accumulating and recording the discharge time of the associated battery-discharge-current interval corresponding to the selected battery-discharge equation;

    G judging whether the discharge voltage being lower than a predetermined value, and returning to the step B if the discharge voltage is higher than the predetermined value;

    H. calculating an estimation error of the residual discharging time when the discharge voltage is lower than a predetermined value;

    I. judging whether the estimation error being greater than a predetermined error value, and terminating the whole procedure if the estimation error is lower than the predetermined error value;

    J. adjusting parameters of the selected battery-discharge equation if the estimation error is greater than the predetermined error value.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×