US 12,442,863 B2
Systems and methods for battery performance monitoring
Jayant Vitthal Sarlashkar, San Antonio, TX (US); Venkata Rajesh Chundru, San Antonio, TX (US); and Bapiraju Surampudi, San Antonio, TX (US)
Assigned to SOUTHWEST RESEARCH INSTITUTE, San Antonio, TX (US)
Filed by Southwest Research Institute, San Antonio, TX (US)
Filed on Jan. 9, 2024, as Appl. No. 18/407,535.
Claims priority of provisional application 63/479,030, filed on Jan. 9, 2023.
Prior Publication US 2024/0230778 A1, Jul. 11, 2024
Int. Cl. G01R 31/389 (2019.01); G01R 31/36 (2020.01); G01R 31/378 (2019.01); G01R 31/3842 (2019.01); G01R 31/392 (2019.01); H01M 10/0525 (2010.01)
CPC G01R 31/389 (2019.01) [G01R 31/3646 (2019.01); G01R 31/378 (2019.01); G01R 31/3842 (2019.01); G01R 31/392 (2019.01); H01M 10/0525 (2013.01)] 24 Claims
OG exemplary drawing
 
1. Battery testing and monitoring system, comprising:
impedance determination circuitry to determine a first plurality of impedance values associated with a first charging current and a second plurality of impedance values associated with a second charging current; wherein each of the first and second plurality of impedance values being determined during a charging interruption period; and
comparison circuitry to compare respective ones of the first plurality of impedance values to respective ones of the second plurality of impedance values, and to determine a maximum compared value representing a maximum difference between the first and second plurality of impedance values; the comparison circuitry also to compare the maximum compared value to one or more thresholds representing aging characteristics of the battery.