Cap assembly, secondary battery including cap assembly, and method of manufacturing secondary battery
AssigneeSamsung SDI Co., Ltd.
InventorDae Kyu KIM
Life of this patent
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Abstract
The present disclosure provides a cap assembly that provides improved sealing, a secondary battery including the cap assembly, and a method of manufacturing the secondary battery. The cap assembly includes a upper cap, a safety vent below the upper cap and surrounding at least a portion of an edge of the upper cap, a lower cap below the safety vent, an insulator between the safety vent and the lower cap, and an injection molded gasket integral to the safety vent and surrounding at least a portion of an edge of the safety vent.
Claims20
A cap assembly comprising:
- an upper cap;
- a safety vent below the upper cap and surrounding at least a portion of an edge of the upper cap;
- a lower cap below the safety vent;
- an insulator between the safety vent and the lower cap;
- and
- an injection molded gasket integral to the safety vent and surrounding at least a portion of an edge of the safety vent.
A secondary battery comprising:
- a cylindrical case configured to have an opening;
- an electrode assembly accommodated in the case;
- and
- a cap assembly coupled the case to close the opening,
- wherein the cap assembly comprises:
- an upper cap;
- a safety vent below the upper cap and surrounding at least a portion of an edge of the upper cap;
- a lower cap below the safety vent;
- an insulator between the safety vent and the lower cap;
- and
- an injected molded gasket integral to the safety vent and surrounding at least a portion of an edge of the safety vent.
A method of manufacturing a secondary battery, the method comprising:
- preparing a cylindrical case having an opening;
- preparing a cap assembly;
- inserting an electrode assembly into the case;
- forming a beading portion by bending a side wall portion of the case;
- seating the cap assembly on the beading portion;
- and
- forming a crimping portion by bending an end portion of the side wall portion to thereby seal the opening with the cap assembly,
- wherein the cap assembly comprises a upper cap;
- a safety vent below the upper cap and bent to surround at least a portion of an edge of the upper cap;
- a lower cap below the safety vent;
- an insulator between the safety vent and the lower cap, and a gasket integral to the safety vent and formed by injection molding, with the gasket surrounding at least a portion of an edge of the safety vent.
Dependencies are inferred from the claim text.