Cylindrical secondary battery including a cap assembly with an interconnection area
AssigneeSamsung SDI Co., Ltd.
InventorDae Kyu Kim
Life of this patent
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Abstract
A technical problem to be solved according to an embodiment of the present invention is to provide a cylindrical secondary battery which can prevent components thereof from being deformed during manufacturing processes or in use. To this end, an embodiment of the present invention provides a cylindrical secondary battery comprising: a cylindrical can; an electrode assembly received in the cylindrical can; and a cap assembly covering the cylindrical can to seal the electrode assembly, wherein the cap assembly comprises a cap-up, a cap-down below the cap-up, and a safety vent between the cap-up and the cap-down, and the contact ratio between the safety vent and the cap-down ranges from 60% to 100%.
Claims8
A cylindrical secondary battery comprising:
- a cylindrical can;
- an electrode assembly accommodated in the cylindrical can;
- and
- a cap assembly configured to cover the cylindrical can so as to seal the electrode assembly,
- wherein the cap assembly comprises a cap-up, a cap-down below the cap-up, and a safety vent between the cap-up and the cap-down,
- wherein a mutual contact ratio between the safety vent and the cap-down ranges from 60% to 100%,
- wherein the safety vent comprises a vent protrusion having a lower surface protruding toward the cap-down,
- wherein the cap-down comprises a cap-down bottom part having an upper surface to which the vent protrusion is welded, and
- wherein the mutual contact ratio is defined based on an area of the lower surface of the vent protrusion rather than an area of the upper surface of the cap-down bottom part.
Dependencies are inferred from the claim text.