Power storage device and method for manufacturing same

Abstract

The power storage device includes: a case (exterior case 4) including a storage portion (6); a power storage element (8) in which an electrode tab (anode tab 10, cathode tab 12) is formed on a wound end surface and which is stored in the storage portion; a sealing member (18) which is disposed in the storage portion and whose peripheral surface is crimped to an inner wall surface of the case by swaging (swaging portion 30) from an outer peripheral side of the case to seal an opening portion of the storage portion; a support plate (current collecting plate 14) which is in contact with and supports a surface of the sealing member, the surface facing a bottom side of the storage portion; and a support member (folder 20) which is disposed on a surface of plane surfaces of the sealing member, the surface of the plane surfaces facing an opening portion side of the storage portion, and presses and supports the sealing member by engagement with an opening end (36) of the case swaged (vertical swaging portion 32) toward the bottom side of the storage portion. As a result, the sealed state of the case by the sealing member is stabilized against an increase in the pressure in the case.

Dependencies are inferred from the claim text.