Secondary Battery And Battery Pack Comprising Same

Abstract: The present invention relates to a secondary battery and a battery pack comprising same. A secondary battery according to one aspect of the present invention comprises: an electrode assembly extending in one direction; an outer film that covers a portion of the electrode assembly; and a cap that covers the remainder of the electrode assembly, wherein the cap may include: a cover part that covers one side of the electrode assembly in the extending direction; a connection part including a joining part provided on an outer surface of the cover part and joined to the outer film; and a terminal part at least partially exposed to the outer surface of the cover part and electrically connected to the electrode assembly, wherein the joining part of the connection part may include a first layer that includes a first resin and has an outer surface allowing joining with an inner surface of the outer film and an inner surface allowing joining with an outer surface of the cover part.

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