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EVALUATING CAPACITY FADE IN DUAL INSERTION BATTERIES USING POTENTIAL AND TEMPERATURE MEASUREMENTS

United States Patent Application

20170194669
A1
View the Complete Application at the US Patent & Trademark Office
Methods and systems are described of managing a battery system. The battery system including at least one battery cell and one or more sensors configured to measure a temperature of the at least one battery cell. The method includes receiving a measurement of the temperature of the at least one battery cell, estimating an open circuit potential of the at least one battery cell, estimating a capacity fade of the at least one battery cell based on the open circuit potential of the at least one battery cell and a ratio of a change in the open circuit potential relative to a change in the temperature of the at least one battery cell, and regulating at least one of charging or discharging of the at least one battery cell based on the estimation of the capacity fade.
Christensen, John F. (Elk Grove, CA), Klein, Reinhardt (Mountain View, CA), Srouji, Abdul-Kader (San Francisco, CA), Krupadanam, Ashish (Cupertino, CA), MirTabatabaei, Anahita (San Francisco, CA), Ravi, Nikhil (Mountain View, CA)
15/ 072,839
March 17, 2016
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH [0002] This invention was made with government support under ARPA-E Award Number DE-AR0000278 awarded by the U. S. Department of Energy. The U. S. government has certain rights in the invention.