US 11,813,958 B2
Automated reference electrode management
Brian J. Koch, Berkley, MI (US); Jing Gao, Rochester, MI (US); Alfred Zhang, Troy, MI (US); Alok Warey, Novi, MI (US); Jason Graetz, Calabasas, CA (US); Chia-Ming Chang, Agoura Hills, CA (US); Daniel M. Zehnder, Los Angeles, CA (US); Patrick J. Webb, Los Angeles, CA (US); and Souren Soukiazian, Burbank, CA (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Sep. 17, 2021, as Appl. No. 17/478,292.
Prior Publication US 2023/0090433 A1, Mar. 23, 2023
Int. Cl. B60L 58/12 (2019.01); G01R 19/165 (2006.01)
CPC B60L 58/12 (2019.02) [G01R 19/16566 (2013.01); B60L 2240/547 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of controlling a state of charge of a reference electrode in a battery, comprising:
charging an anode of the battery to a fully lithiated state, the battery including the anode, a cathode and the reference electrode between the anode and the cathode;
obtaining a measurement of an anode-reference voltage of the battery with the anode in the fully lithiated state;
commencing a discharging of the reference electrode to the cathode to remove a lithium ion from the reference electrode to the cathode when the anode-reference voltage falls below a minimum voltage threshold;
monitoring the anode-reference voltage during the discharging of the reference electrode to the cathode; and
ending the discharging when the anode-reference voltage reaches a selected voltage.