US 12,142,775 B1
Method for manufacturing a co-axial glass-to-metal seal feedthrough for a case-neutral electrochemical cell
Paul T. Hallifax, Gasport, NY (US); and Michael F. Scalise, Clarence, NY (US)
Assigned to Greatbatch Ltd., Clarence, NY (US)
Filed by Greatbatch Ltd., Clarence, NY (US)
Filed on Jul. 22, 2024, as Appl. No. 18/779,276.
Application 18/779,276 is a continuation in part of application No. 18/437,703, filed on Feb. 9, 2024, granted, now 12,095,102.
Claims priority of provisional application 63/444,629, filed on Feb. 10, 2023.
Int. Cl. H01M 50/191 (2021.01); H01M 6/00 (2006.01); H01M 10/0525 (2010.01); H01M 50/119 (2021.01); H01M 50/172 (2021.01); H01M 50/184 (2021.01); H01M 50/198 (2021.01)
CPC H01M 50/191 (2021.01) [H01M 6/00 (2013.01); H01M 10/0525 (2013.01); H01M 50/119 (2021.01); H01M 50/172 (2021.01); H01M 50/184 (2021.01); H01M 50/198 (2021.01)] 21 Claims
OG exemplary drawing
 
1. A method for making a co-axial glass-to-metal seal (GTMS), comprising the steps of:
a) providing a terminal pin extending along a terminal pin axis;
b) providing an inner ferrule comprising an inner ferrule sidewall extending to an inner ferrule first end spaced from an inner ferrule second end, wherein the inner ferrule first and second ends extend to an inner ferrule inner annular surface defining an inner ferrule opening opposite an inner ferrule outer annular surface;
c) providing a sleeve-shaped inner insulating glass extending to an inner glass first end spaced from an inner glass second end, wherein the inner glass first and second ends extend to an inner glass inner annular surface defining an inner glass opening opposite an inner glass outer annular surface;
d) providing an outer ferrule comprising an outer ferrule sidewall extending to an outer ferrule first end spaced from an outer ferrule second end, wherein the outer ferrule first and second ends extend to an outer ferrule inner annular surface defining an outer ferrule opening opposite an outer ferrule outer annular surface; and
e) providing a sleeve-shaped outer insulating glass having an outer glass opening extending to an outer glass first end spaced from an outer glass second end, wherein the outer glass first and second ends extend to an outer glass inner annular surface defining an outer glass opening opposite an outer glass outer annular surface;
f) positioning the terminal pin in the inner glass opening, positioning the inner insulating glass in the inner ferrule opening, positioning the inner ferrule in the outer glass opening, and positioning the outer glass in the outer ferrule opening to thereby provide a co-axial GTMS assembly; and
g) subjecting the co-axial GTMS assembly to a heat treatment to hermetically seal the inner insulating glass to the terminal pin and the inner annular surface of the inner ferrule and to hermetically seal the outer insulating glass to the outer annular surface of the inner ferrule and the inner annular surface of the outer ferrule to provide the co-axial GTMS.