Jelly-roll of structure having elastic member adhered on active material-non-coated portion and secondary battery employed with the same
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United States of America Patent
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Mar 31, 2015
Grant Date -
Oct 7, 2010
app pub date -
Jul 11, 2008
filing date -
Jul 16, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Disclosed herein are a winding type electrode assembly (‘jelly-roll’) constructed in a structure in which a cathode sheet and an anode sheet are wound in a circle while a separator is interposed between the cathode sheet and the anode sheet or the assembly is compressed in one direction after winding, wherein the jelly-roll includes an active material non-coated portion formed at the wound end of the jelly-roll, a conductive tape attached to the wound end of the jelly-roll for covering the wound outside of the jelly-roll including the active material non-coated portion, and an elastic member attached to the inside of the active material non-coated portion, the elastic member having a thickness equivalent to 50 to 200% of the height of an active material layer, and a secondary battery including the same.
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