Patent ID: 8383255

Claim:
An electrochemical cell, comprising: a cylindrical container having a closed bottom end, a sidewall and an open end; an electrode assembly and an electrolyte disposed within the container; an end assembly positioned within the open end, said end assembly having a vent assembly, a cover and a PTC device; an annular gasket concentrically disposed between the container and the end assembly, said gasket having a radial protrusion that is: i) formed along at least a portion of an inner circumference of the gasket, ii) extended radially inward along a radial plane and iii) defined by an innermost diameter along a middle portion of the gasket intersecting the radial plane; wherein the innermost diameter is smaller than an outer diameter formed when a terminal edge of the open end of the container is crimped radially inward over the gasket; wherein a portion of the cover and a portion of the vent assembly form a compressive seal with the gasket on opposite sides of the radial protrusion; and wherein the radial protrusion has an axial height that is at least equal to an axial height of the PTC device; and wherein the PTC has a diameter that is less than or equal to the innermost diameter and is aligned proximate to the radial protrusion in the radial plane so that the radial protrusion fits around the PTC device.