Patent ID: 9105896
Filing Date: 2015-08-11
Classification: H01M,Y02E,Y10T

Abstract:
1. A sub-assembly for at least partially sealing a cell of a sodium-based thermal battery, the sub-assembly including: an outer metal ring defining a first aperture and including a first portion and a second portion, the second portion defining a length and a thickness, wherein the thickness of the second portion tapers along its length; an inner metal ring defining a second aperture that is smaller than the first aperture of the outer metal ring and including a third portion and a fourth portion, the fourth portion defining a length and a thickness, wherein the thickness of the fourth portion tapers along its length; and a ceramic collar defining a third aperture and including a first surface and a second surface, wherein at least a portion of the second portion of the outer metal ring is joined to the first surface of the ceramic collar by active brazing, wherein at least a portion of the fourth portion of the inner metal ring is joined to the second surface of the ceramic collar by active brazing, and wherein the ceramic collar substantially electrically insulates the outer and inner metal rings.