Estimation method for residual discharging time of batteries
First Claim
1. An estimation method for a residual discharging time of batteries, comprising the steps of:
- A. setting a series of battery-discharge-current intervals for a discharge procedure from a discharge start step to a discharge terminating step and multiple separate battery-discharge equations thereof, with each of the multiple separate battery-discharge equations corresponding to at least one of the series of battery-discharge-current intervals, and further setting a discharge time of each of the series of battery-discharge-current intervals at zero;
B. detecting a discharge current, a discharge time and a discharge voltage of the batteries;
C. judging whether the discharge current exceeds all of the series of battery-discharge-current intervals, and terminating if the discharge current exceeds all of the series of battery-discharge-current intervals;
D. selecting one of the multiple separate battery-discharge equations corresponding to the at least one of the series of battery-discharge-current intervals according to the detected discharge current;
E. calculating a residual discharging time of the batteries;
F. accumulating and recording the discharge time of the at least one of the series of battery-discharge-current intervals corresponding to the selected separate battery-discharge equation;
G. judging whether the discharge voltage is 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 the predetermined value;
I. judging whether the estimation error is greater than a predetermined error value, and terminating if the estimation error is lower than the predetermined error value; and
J. adjusting parameters of the selected separate battery-discharge equation if the estimation error is greater than the predetermined error value.
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Abstract
An estimation method for residual discharging time of batteries includes the steps of: providing a set of battery-discharge-current intervals and a set of battery-discharge equations, setting the discharge time of each battery-discharge-current intervals at zero; detecting a discharge current, voltage and time of batteries; judging whether the discharge current exceeds all of the battery-discharge-current intervals; selecting one of the battery-discharge-current intervals and the associated battery-discharge equation according to the detected discharge current; calculating an estimation of residual discharging time; accumulating and recording the discharge time; judging whether the discharge voltage is lower than a predetermined value and calculating an estimation error of the residual discharging time; and adjusting parameters of the battery-discharge equation for reducing the estimation error of the residual discharging time if the estimation error is greater than a predetermined error value.
13 Citations
9 Claims
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1. An estimation method for a residual discharging time of batteries, comprising the steps of:
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A. setting a series of battery-discharge-current intervals for a discharge procedure from a discharge start step to a discharge terminating step and multiple separate battery-discharge equations thereof, with each of the multiple separate battery-discharge equations corresponding to at least one of the series of battery-discharge-current intervals, and further setting a discharge time of each of the series of battery-discharge-current intervals at zero; B. detecting a discharge current, a discharge time and a discharge voltage of the batteries; C. judging whether the discharge current exceeds all of the series of battery-discharge-current intervals, and terminating if the discharge current exceeds all of the series of battery-discharge-current intervals; D. selecting one of the multiple separate battery-discharge equations corresponding to the at least one of the series of battery-discharge-current intervals according to the detected discharge current; E. calculating a residual discharging time of the batteries; F. accumulating and recording the discharge time of the at least one of the series of battery-discharge-current intervals corresponding to the selected separate battery-discharge equation; G. judging whether the discharge voltage is 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 the predetermined value; I. judging whether the estimation error is greater than a predetermined error value, and terminating if the estimation error is lower than the predetermined error value; and J. adjusting parameters of the selected separate battery-discharge equation if the estimation error is greater than the predetermined error value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification