Jelly Roll With Improved Electrolyte Impregnation Property, And Cylindrical Battery Cell, Battery Pack, And Vehicle Comprising Same

Abstract: A jelly-roll according to an embodiment of the present invention is a jelly-roll having a structure in which a stack comprising a first electrode having a first electrode tab with first polarity, a second electrode having a second electrode tab with second polarity, and a separator interposed between the first and second electrodes is wound in one direction, wherein at least one of the first electrode tab and the second electrode tab has a plurality of slits formed along the winding direction of the jelly-roll, and the distance between the respective slits gradually increases from the core side toward the outer circumferential side of the jelly-roll.

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