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1. (WO2018107140) NONLINEAR ACOUSTIC RESONANCE SPECTROSCOPY (NARS) FOR DETERMINING PHYSICAL CONDITIONS OF BATTERIES

Pub. No.:    WO/2018/107140    International Application No.:    PCT/US2017/065516
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Tue Dec 12 00:59:59 CET 2017
IPC: G01N 29/12
B60L 11/18
G01R 31/36
G01N 29/34
G01N 29/46
H01M 10/48
Applicants: FEASIBLE, INC.
Inventors: HSIEH, Andrew Gaheem
VAN TASSELL, Barry James
MOHR, Robert Charles
WILKINSON, Anne
AJO-FRANKLIN, Jonathan
BISWAS, Shaurjo
Title: NONLINEAR ACOUSTIC RESONANCE SPECTROSCOPY (NARS) FOR DETERMINING PHYSICAL CONDITIONS OF BATTERIES
Abstract:
Systems and methods of determining physical conditions of a battery, such as state of charge (SOC), state of health (SOH), quality of construction, defect, or failure state include driving two or more acoustic signals of two or more amplitudes, each acoustic signal having two or more frequencies, into the battery and detecting vibrations generated in the battery based on the two or more acoustic signals. Nonlinear response characteristics of the battery for the two or more acoustic signals are determined from the detected vibrations. The physical conditions of the battery are determined based at least in part on the nonlinear response characteristics, using nonlinear acoustic resonance spectroscopy (NARS) or nonlinear resonant ultrasound spectroscopy (NRUS).