×

IN-SITU BATTERY DIAGNOSIS METHOD USING ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY

  • US 20120078552A1
  • Filed: 09/22/2011
  • Published: 03/29/2012
  • Est. Priority Date: 09/27/2010
  • Status: Active Grant
First Claim
Patent Images

1. A method of estimating an internal state of at least a first electrochemical system for electric power storage, wherein at least one property relative to the internal state of said first electrochemical system is estimated from electrochemical impedance measurements, characterized in that it comprises the following stages:

  • for various internal states of at least a second electrochemical system of the same type as said first electrochemical system;

    -measuring said property relative to the internal state of said second system; and

    -measuring the electrochemical impedance of said second electrochemical system at least at one frequency;

    defining an electrochemical impedance model as a function of said property and of parameters, and calibrating said parameters by means of an adjustment on said electrochemical impedance measurements obtained for said internal states;

    determining an electrochemical impedance Z of said first electrochemical system for at least one frequency,estimating the internal state of said first electrochemical system by estimating said property relative to the internal state of said electrochemical system using said model and said electrochemical impedance Z.

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