US 12,467,900 B2
Systems and methods for assessing reference electrode assemblies for electrochemical cells
Biqiong Wang, Madison Heights, MI (US); Insun Yoon, Troy, MI (US); Fang Dai, Troy, MI (US); and Mark W. Verbrugge, Troy, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Aug. 3, 2022, as Appl. No. 17/880,518.
Prior Publication US 2024/0044838 A1, Feb. 8, 2024
Int. Cl. G01N 27/48 (2006.01); G01N 27/30 (2006.01); G01N 27/333 (2006.01)
CPC G01N 27/48 (2013.01) [G01N 27/301 (2013.01); G01N 27/333 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system for assessing a characteristic of a current collector layer of a reference electrode assembly for an electrochemical cell that cycles lithium ions, the system comprising:
a controller; and
a test cell assembly comprising:
a first metal case comprising a top and a bottom that together define an interior of the first metal case, the top of the first metal case being electrically coupled to the controller via a first electrical connector and the bottom of the first metal case being electrically coupled to the controller via a second electrical connector, and
a test cell disposed within the interior of the first metal case, the test cell comprising a first electroactive layer, a first lithium metal layer, and a separator assembly disposed between the first electroactive layer and the first lithium metal layer, the separator assembly comprising a first separator layer having a first major surface and a current collector layer deposited on the first major surface of the first separator layer, the current collector layer being electrically isolated from the lithium metal layer by the first separator layer, and the current collector layer being in direct physical contact with the first electroactive layer,
wherein the first lithium metal layer is electrically coupled to the top of the first metal case and the first electroactive layer is electrically coupled to the bottom of the first metal case.