METHOD FOR ESTIMATING THE STATE OF HEALTH OF AN ELECTROCHEMICAL CELL FOR STORING ELECTRICAL ENERGY
First Claim
1. A method for estimating the state of health of an electrochemical cell for storing electrical energy, the method comprising:
- applying to the cell at least one current peak of intensity I1, the current peak flowing through the cell;
measuring the variation, as a function of the time t that has passed after the application of the current peak, of the voltage U across the terminals of the cell; and
calculating at least one coefficient α
I1 and at least one coefficient U0,I1 such that the function √
{square root over (t)}→
α
I1×
√
{square root over (t)}+U0,I1 is a linear approximation of the variation of the voltage U as a function of √
{square root over (t)} for √
{square root over (t)}≧
C, where C>
0.
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Abstract
A method for estimating a state of health of an electrochemical cell for storing electrical energy includes applying at least one current strength peak to the cell, the current peak passing through the cell, measuring a variation, as a function of a time t elapsed after the application of the current peak, of voltage U at the terminals of the cell, and calculating at least one coefficient αI
50 Citations
9 Claims
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1. A method for estimating the state of health of an electrochemical cell for storing electrical energy, the method comprising:
-
applying to the cell at least one current peak of intensity I1, the current peak flowing through the cell; measuring the variation, as a function of the time t that has passed after the application of the current peak, of the voltage U across the terminals of the cell; and calculating at least one coefficient α
I1 and at least one coefficient U0,I1 such that the function √
{square root over (t)}→
α
I1 ×
√
{square root over (t)}+U0,I1 is a linear approximation of the variation of the voltage U as a function of √
{square root over (t)} for √
{square root over (t)}≧
C, where C>
0. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification