Bi-cell for secondary battery having improved stability and method of preparing the same
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United States of America Patent
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Nov 21, 2017
Grant Date -
Dec 11, 2014
app pub date -
Aug 25, 2014
filing date -
Feb 26, 2013
priority date (Note) -
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Abstract
Provided are a bi-cell for a secondary battery having improved stability which may reduce shrinkage of a separator, and a method of preparing the bi-cell. The bi-cell for a secondary battery having improved stability according to an exemplary embodiment of the present invention is characterized in that a cathode and an anode are alternatingly disposed in a state in which the cathode has one more layer than the anode or the anode has one more layer than the cathode, separators having a bigger size than the cathode and the anode and insulating the cathode and the anode are disposed between the cathode and the anode, and edges of an upper separator and edges of a lower separator, which face to each other having the cathode and the anode disposed therebetween, are attached to each other to form fused portions.
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