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Strain measurement based battery testing

United States Patent

9,660,299
May 23, 2017
View the Complete Patent at the US Patent & Trademark Office
A method and system for strain-based estimation of the state of health of a battery, from an initial state to an aged state, is provided. A strain gauge is applied to the battery. A first strain measurement is performed on the battery, using the strain gauge, at a selected charge capacity of the battery and at the initial state of the battery. A second strain measurement is performed on the battery, using the strain gauge, at the selected charge capacity of the battery and at the aged state of the battery. The capacity degradation of the battery is estimated as the difference between the first and second strain measurements divided by the first strain measurement.
Xu; Jeff Qiang (San Antonio, TX), Steiber; Joe (Spring Branch, TX), Wall; Craig M. (San Antonio, TX), Smith; Robert (Fair Lawn, NJ), Ng; Cheuk (San Antonio, TX)
SOUTHWEST RESEARCH INSTITUTE (San Antonio, TX)
14/ 102,197
December 10, 2013
GOVERNMENT RIGHTS CLAUSE This invention was made with government support under Award No. DE-AR0000277 awarded by U.S. Department of Energy. The government has certain rights in the invention.