公开(公告)号：US20230027470A1

公开(公告)日：2023-01-26

申请号：US17783562

申请日：2020-11-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masao Ootsuka ,  Tadayoshi Takahashi

IPC: H01M50/342 ,  H01M50/184 ,  H01M50/107

Abstract: A sealed battery includes a battery can with a bottomed cylindrical shape having an opening, an electrode body accommodated in the battery can, and a sealing plate closing the opening of the battery can. The sealing plate has a first main surface facing an outside of the battery can and a second main surface opposite to the first main surface. The first main surface has a first groove therein with an arc shape. The second main surface has a second groove therein with an arc shape disposed to correspond to the first groove. The first groove has a central angle A1 smaller than a central angle A2 of the second groove. The first groove intersects a symmetry axis of the second groove on the second groove when viewed in a normal direction of the first main surface.

公开(公告)号：US20230112952A1

公开(公告)日：2023-04-13

申请号：US17913744

申请日：2021-02-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kenji Yamato ,  Masao Ootsuka

IPC: H01M50/184 ,  H01M50/152 ,  H01M10/0587 ,  H01M50/107

Abstract: A hermetically sealed battery includes: a battery can having a cylindrical shape with a bottom and an opening; an electrode body accommodated in the battery can; and a sealing plate sealing the opening of the battery can. The sealing plate has a first main surface facing an outside of the battery can and a second main surface opposite thereto. The sealing plate includes an outer peripheral portion having a flat plate shape, an inner peripheral portion having a flat plate shape, an inclined portion provided between the outer and inner peripheral portions. The inclined portion is inclined such that the inner peripheral portion is positioned on an outer side of the battery can than the outer peripheral portion. The inclined portion includes a thin portion and a thicker base portion. The thin portion and the base portion are arranged in a radial direction of the sealing plate.

公开(公告)号：US20230178831A1

公开(公告)日：2023-06-08

申请号：US17924002

申请日：2021-04-20

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Masao Ootsuka ,  Tadayoshi Takahashi ,  Futoshi Tanigawa ,  Naoaki Nishimura ,  Kyosuke Okazaki

IPC: H01M50/184 ,  H01M50/107 ,  H01M50/559 ,  H01M50/188

CPC classification number: H01M50/184 ,  H01M50/107 ,  H01M50/559 ,  H01M50/188

Abstract: A hermetically sealed battery includes a battery can having a bottomed cylindrical shape and an opening, an electrode body accommodated in the battery can, a sealing plate covering the opening of the battery can, a rivet disposed on the sealing plate and serving as a terminal, an insulator insulates the sealing plate from the rivet, and an internal lead electrically connected to the rivet. The insulator includes a sealing part sealing between the sealing plate and the rivet and a plate part closer to the electrode body than the sealing part, the plate part being extended in a radial direction of the electrode body. The plate part has a cut-away portion recessed in a periphery of the plate part in the radial direction. The internal lead is partially disposed in the cut-away portion.