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Method for monitoring/managing electrochemical energy device by detecting intercalation stage changes

United States Patent

9,583,796
February 28, 2017
View the Complete Patent at the US Patent & Trademark Office
A method for determining an operating state (e.g., state-of-charge or state-of-health) and/or generating management (charge/discharge) control information in a system including an electrochemical energy device (EED, e.g., a rechargeable Li-ion battery, supercapacitor or fuel cell) that uses optical sensors to detect the intercalation stage change events occurring in the EED. The externally or internally mounted optical sensors measure operating parameter (e.g., strain and/or temperature) changes of the EED during charge/recharge cycling, and transmit measured parameter data using light signals sent over optical fibers to a detector/converter. A processor then analyzes the measured parameter data, e.g., using a model-based estimation process, to detect intercalation stage changes (i.e., crystalline structure changes caused by migration of guest species, such as Li-ions, between the EED's anode and cathode), and generates the operating state and charge/discharge control information based the analysis.
Saha; Bhaskar (Redwood City, CA), Raghavan; Ajay (Mountain View, CA), Kiesel; Peter (Palo Alto, CA), Sommer; Lars Wilko (Bretten, DE), Lochbaum; Alexander (Landau, DE), Staudt; Tobias (Nuremberg, DE), Sahu; Saroj Kumar (Fremont, CA), Ganguli; Anurag (Milpitas, CA)
PALO ALTO RESEARCH CENTER INCORPORATED (Palo Alto, CA)
14/ 242,850
April 1, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT This invention was made with government support under contract number ARPA DE-AR0000274, awarded by ARPA-E (Advanced Research Projects Agency-Energy). The U.S. Government has certain rights in this invention.