POWER STORAGE DEVICE AND MANUFACTURING METHOD THEREOF

• Main Authors: TSUMEDA SATORU, KUROKI TAKASHI, YASUDA RYOICHI
• Format: Patent
• Language: English; Japanese
• Published: 17.05.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY

To stabilize a sealing state of a case by a sealing member against a pressure increase in the case.SOLUTION: A power storage device comprises: a case (outer casing 4) having a housing part (6); a power storage element (8) in which an electrode tab (positive electrode tab 10 and a negative electrode tab 12) is formed on a winding end surface, and which is housed in the housing part; a sealing member (18) that is arranged in the housing part, in which a peripheral surface is crimped with an inner wall surface of the case by a fastening (fastening part 30) from the outer peripheral side of the case to seal an open part of the housing part; a support plate (collector board 14) for supporting it so as to be contacted to a surface directed to a bottom part side of the housing part of the sealing member; and a support member (a folder 20) that is arranged on the surface on the open part side of the housing part of the sealing member, and supports the sealing member with a pressure by an engagement of the open end (36) of the case to be fastened (vertical fastening part 32) toward the bottom part side of the housing part.SELECTED DRAWING: Figure 1 【課題】ケース内の圧力上昇に対して、封口部材によるケースの封止状態を安定化させる。【解決手段】収納部（６）を備えるケース（外装ケース４）と、巻回端面に電極タブ（陽極タブ１０、陰極タブ１２）が形成されており、収納部内に収納される蓄電素子（８）と、収納部内に配置され、ケースの外周側からの加締め（加締め部３０）により周面がケースの内壁面と圧着して、収納部の開口部を封止する封口部材（１８）と、封口部材の収納部の底部側に向けた面に接触して支持する支持板（集電板１４）と、封口部材の収納部の開口部側の面に配置されており、収納部の底部側に向けて加締められた（縦加締め部３２）ケースの開口端（３６）との係合により封口部材を押圧して支持する支持部材（フォルダ２０）とを備える。【選択図】 図１