Cap assembly having improved manufacturing processability and cylindrical battery comprising same
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United States of America Patent
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Nov 3, 2015
Grant Date -
Oct 9, 2014
app pub date -
Dec 13, 2012
filing date -
Dec 26, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed herein is a cap assembly loaded on an open upper end of a cylindrical container of a battery configured to have a structure in which an electrode assembly (jelly roll) of a cathode/separator/anode structure is mounted in the cylindrical container, the cap assembly including a safety vent connected to a current interruptive device (CID) for safety, a protruding top cap connected to the safety vent along an outer circumference thereof, and a gasket mounted at an outer circumference of the top cap, wherein a cathode tab is attached to a cathode active material-uncoated portion of the cathode by welding and the gasket is provided with at least one groove depressed upward from an outer circumference of a lower end of the gasket for easy welding between the CID and the cathode tab at the time of manufacturing the battery.
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