US 11,855,265 B2
Acoustic signal based analysis of batteries
Barry J. Van Tassell, El Cerrito, CA (US); Shan Dou, Berkeley, CA (US); Shaurjo Biswas, El Cerrito, CA (US); Andrew G. Hsieh, Berkeley, CA (US); and Andrew M. Raphael, El Cerrito, CA (US)
Assigned to LIMINAL INSIGHTS, INC., Emeryville, CA (US)
Filed by LIMINAL INSIGHTS, INC., Emeryville, CA (US)
Filed on Dec. 4, 2020, as Appl. No. 17/112,756.
Claims priority of provisional application 62/943,507, filed on Dec. 4, 2019.
Prior Publication US 2021/0175553 A1, Jun. 10, 2021
Int. Cl. G01N 29/14 (2006.01); H01M 10/48 (2006.01); G08C 17/02 (2006.01); G01N 29/024 (2006.01); G01R 31/392 (2019.01)
CPC H01M 10/484 (2013.01) [G01N 29/024 (2013.01); G01N 29/14 (2013.01); G01R 31/392 (2019.01); G08C 17/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of acoustic signal based analysis, the method comprising:
obtaining acoustic response signal data of at least a portion of a battery cell, the acoustic response signal data including waveforms generated by transmitting one or more acoustic excitation signals into at least the portion of the battery cell and recording response vibration signals to the one or more acoustic excitation signals;
determining one or more metrics from the acoustic response signal data to be evaluated, the one or more metrics being indicative of one or more characteristics of the battery cell;
determining at least one reference model applicable to the one or more metrics;
applying the at least one reference model to the one or more metrics to determine the one or more characteristics of the battery cell, the reference model having been previously generated using previously collected acoustic response signal data and non-acoustic data of a plurality of batteries, the reference model receiving the acoustic response signal data of at least the portion of the battery cell as input; and
generating one or more actionable insights for the battery cell using the one or more characteristics.