Cylindrical Battery, And Battery Pack And Vehicle Including Same

Abstract: Disclosed in the present invention is a cylindrical battery configured to reduce the deformation of an electrode assembly and the intensity of flame when a thermal event occurs inside a battery cell. A cylindrical battery according to an aspect of the present invention comprises: an electrode assembly including a first electrode, a second electrode, and a separator therebetween, and having a central hole formed when a laminate including the first electrode, the second electrode, and the separator is wound around a winding axis; a battery housing which accommodates the electrode assembly through an opening part formed on one side thereof; and a flame-retardant member of which at least a part is arranged inside the central hole.

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