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METHOD FOR ESTIMATING THE STATE OF HEALTH OF AN ELECTROCHEMICAL CELL FOR STORING ELECTRICAL ENERGY

  • US 20160154063A1
  • Filed: 05/26/2014
  • Published: 06/02/2016
  • Est. Priority Date: 06/04/2013
  • Status: Active Grant
First Claim
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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.

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