Electrolyte injection o-ring and cylindrical battery manufacturing method using the same

Abstract

An electrolyte injection O-ring and a cylindrical battery manufacturing method using the same are provided. The electrolyte injection O-ring includes a body portion having an open top end and an open bottom end and defining a cavity along a central axis; and a diameter-enlarged portion extending from a lower portion of the body portion along a centrifugal direction and the central axis direction. The diameter-enlarged portion includes an outer circumferential surface surrounding the central axis. The diameter-enlarged portion deforms elastically when pressure is applied in the axial direction, so that a diameter of the outer circumferential surface increases in the centrifugal direction.

Dependencies are inferred from the claim text.