END CAP SEAL FOR AN ELECTROCHEMICAL CELL

摘要

An end cap seal assembly (14) for an electrochemical cell such as an alkaline cell is disclosed. The end cap assembly (14) comprises a metal support disk (40) and underlying insulating sealing disk (20) and a metal end cap (60) overlying the metal support disk (40). The edge of the end cap (60) and metal support disk (40) is captured by the crimped edge of the insulating sealing disk (20). The support disk (40) has a downwardly extending wall with at least one aperture (48) therethrough. The insulating disk (20) is preferably composed of a polyetherurethane material and may have a slanted downwardly extending wall forming a rupturable (23) membrane which underlies and abuts the inside surface of the downwardly extending wall of the support disk (40). A portion of the rupturable membrane (23) underlies and abuts the aperture (48) in the downwardly extending wall of the support disk (40). The rupturable membrane (23) pushes through said aperture (48) and ruptures when gas pressure within the cell exceeds a predetermined level.