Flexible jelly-roll type secondary battery
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United States of America Patent
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Oct 25, 2016
Grant Date -
Jun 26, 2014
app pub date -
Feb 28, 2014
filing date -
Nov 8, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
There is provided a jelly-roll type electrode assembly. In the jelly-roll type electrode assembly including a cathode including a cathode active material coating layer and an anode including an anode active material coating layer, with a separation film interposed therebetween, and formed to be rolled, the jelly-roll type electrode assembly is characterized in that the anode and the cathode include uncoated portions, the uncoated portions are overlapped and include mirror images formed on a front surface and a rear surface, and the jelly-roll type electrode assembly is flexible in the uncoated portion. A pouch-type secondary battery, a battery pack and a device including the electrode assembly are provided. A flexible jelly-roll type secondary battery may be reversibly flexible while blocking the separation of an electrode active material from a current collector surface.
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