In-situ battery diagnosis method using electrochemical impedance spectroscopy
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United States of America Patent
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Sep 30, 2014
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Mar 29, 2012
app pub date -
Sep 22, 2011
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Sep 27, 2010
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Abstract
A method of estimating the internal state of a first electrochemical system for power storage is disclosed. The SoC and the electrochemical impedance are determined for different internal states of a second electrochemical system of a same type as the first electrochemical system being studied. An electrochemical impedance model is then defined as a function of the SoC and of parameters. The electrochemical impedance Z of the system studied is determined and its SoC is estimated using the model applied to electrochemical impedance Z.
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