Patent ID: 6514637
Filing Date: 2003-02-04
Classification: H01M

Abstract:
In an alkaline electrochemical cell, said cell having an open ended cylindrical casing, said cell having a positive and a negative terminal, an anode comprising zinc and a cathode comprising manganese dioxide, said cathode having an outside surface contacting said casing and an inside surface of said cathode facing said anode, a separator contacting said inside surface of the cathode, an electrically insulating sealing disk having a rupturable membrane therein, said insulating sealing disk having an electrically conductive current collector passing therethrough, said insulating sealing disk sealing the open end of said casing and providing electrical insulation between said current collector and said casing, the improvement comprising:the separator being a film adhering to the inside surface of the cathode; an electrically insulating protector disk in contact with a surface of said cathode, said protector disk being a separate component not an integral portion of said sealing disk, said protector disk being located between said cathode and said insulating sealing disk, wherein the cathode runs along the length of the inside surface of said casing, wherein said cathode has a top surface defined as the surface of the cathode in closest proximity to the open end of the casing, wherein the protector disk has a solid surface having a hollow core therethrough, and wherein said protector disk solid surface is in contact with said cathode top surface covering said cathode top surface.