US 12,429,527 B2
System and method for online electrochemical impedance spectroscopy measurement in a battery
Abhijith Vikraman Pillai Santhamma, Prague (CZ); and Hab Collector, Atlanta, GA (US)
Assigned to Garrett Transportation I Inc., Torrance, CA (US)
Filed by Garrett Transportation I Inc., Torrance, CA (US)
Filed on Oct. 31, 2023, as Appl. No. 18/498,996.
Claims priority of provisional application 63/517,484, filed on Aug. 3, 2023.
Prior Publication US 2025/0044366 A1, Feb. 6, 2025
Int. Cl. G01R 31/389 (2019.01); G01R 31/00 (2006.01); G01R 31/3842 (2019.01)
CPC G01R 31/389 (2019.01) [G01R 31/006 (2013.01); G01R 31/3842 (2019.01)] 20 Claims
OG exemplary drawing
 
1. A power system comprising:
a first battery subcircuit;
a second battery subcircuit
an electrochemical impedance spectroscopy (EIS) measurement circuit coupled to each of the first battery subcircuit and the second battery subcircuit; and
a control circuitry coupled to the EIS measurement circuit, the control circuitry configured to perform an EIS test by:
issuing a first control signal to transfer first energy from the first battery subcircuit to the second battery subcircuit; and
synchronously measuring cell voltages and current in the second battery subcircuit as the first energy is transferred.