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Methods and systems for thermodynamic evaluation of battery state of health

United States Patent

December 2, 2014
View the Complete Patent at the US Patent & Trademark Office
Described are systems and methods for accurately characterizing thermodynamic and materials properties of electrodes and battery systems and for characterizing the state of health of electrodes and battery systems. Measurement of physical attributes of electrodes and batteries corresponding to thermodynamically stabilized electrode conditions permit determination of thermodynamic parameters, including state functions such as the Gibbs free energy, enthalpy and entropy of electrode/electrochemical cell reactions, that enable prediction of important performance attributes of electrode materials and battery systems, such as energy, power density, current rate, cycle life and state of health. Also provided are systems and methods for charging a battery according to its state of health.
Yazami; Rachid (Singapore, SG), McMenamin; Joseph (Glendale, CA), Reynier; Yvan (Grenoble, FR), Fultz; Brent T. (Pasadena, CA)
California Institute of Technology (Pasadena, CA), Centre National de la Recherche Scientifique (Paris, FR)
13/ 866,985
April 19, 2013
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with United States governmental support awarded by the following agencies: Department of Energy DE-FG03-00ER15035 and DE-FG02-03ER15425. The United States government has certain rights in this invention.