Elastomeric gasket contacting the inner surface of the casing lid of a pulse dischargeable lithium electrochemical cell

An electrochemical cell, comprising:

• a) a casing comprising:
• i) a container having a sidewall extending from a closed bottom wall to an open end;
• and
• ii) a lid closing the open end of the container, wherein the lid has inner and outer lid surfaces extending to a peripheral edge, and wherein the lid has a terminal pin opening and an electrolyte fill port, and wherein the lid does not have a ferrule;
• and
• b) a terminal pin extending through the terminal pin opening in the lid with a sealing glass directly contacting the terminal pin and the lid at the terminal pin opening so that the terminal pin is in a non-conductive relation with the casing;
• c) an elastomeric gasket comprising an O-ring gasket portion that contacts the sealing glass and a sheet-shaped gasket portion that is connected to the O-ring gasket portion and sealed to the inner surface of the lid;
• d) an electrode assembly housed inside the casing, the electrode assembly comprising:
• i) an anode comprising lithium supported on an anode current collector, wherein the anode current collector comprises at least one anode lead conductively connected to the casing;
• ii) a cathode comprising a cathode current collector comprising opposed major surfaces, wherein silver vanadium oxide and CFx are contacted to the opposed major surfaces of the cathode current collector, and wherein the cathode current collector comprises a cathode tab extending outwardly beyond a perimeter edge of the cathode current collector;
• and
• iii) at least one separator positioned between the anode and the cathode to prevent direct physical contact between them;
• and
• e) an insulator compartment, comprising:
• i) a first insulator member having a first surrounding sidewall extending from a first insulator face wall to a first sidewall outer edge, wherein the first insulator face wall contacts the elastomeric gasket sealed to the inner surface of the lid with the first surrounding sidewall extending away from the lid toward the upper edge of the electrode assembly, and wherein the terminal pin extends through the O-ring gasket portion of the elastomeric gasket and through a first opening in the first insulator face wall;
• and
• ii) a second insulator member having a second surrounding sidewall extending from a second insulator face wall to a second sidewall outer edge, the second insulator face wall being disposed adjacent to the perimeter edge of the cathode current collector with the second surrounding sidewall extending away from the perimeter edge of the cathode current collector toward the lid, wherein the cathode tab extends through a second opening in the second insulator face wall,
• iii) wherein the first and second insulator members are mated to each other with one of the first and second outer edges of the first and second surrounding sidewalls facing the other of the first and second insulator face walls so that at least a portion of the first surrounding sidewall is in an overlapping, direct contact relationship with at least a portion of the second surrounding sidewall to thereby form the insulator compartment residing between the perimeter edge of the cathode current collector and the elastomeric gasket sealed to the inner surface of the lid, and
• iv) wherein the terminal pin is connected to the cathode tab in the insulator compartment;
• and
• f) an electrolyte provided in the casing to activate the electrode assembly.