公开(公告)号：US20230335754A1

公开(公告)日：2023-10-19

申请号：US18044315

申请日：2021-09-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shinya GESHI ,  Shinichi SAKAMOTO ,  Kazumichi SHIMIZU ,  Kiyomi KOZUKI ,  Kazutoshi KOHIRA

IPC: H01M4/75 ,  H01M50/186 ,  H01M50/538 ,  H01M50/107 ,  H01M50/536 ,  H01M50/119

CPC classification number: H01M4/75 ,  H01M50/107 ,  H01M50/119 ,  H01M50/186 ,  H01M50/536 ,  H01M50/538

Abstract: A power storage device includes a first electrode having a first current collector, a second electrode having a second current collector, and a separator, which form a columnar wound body. The power storage device includes a cylinder covering an outer periphery of the columnar wound body and having a first opening, a sealing body sealing the first opening, and at least one first tab, its one end connected to the first current collector and the other end connected to the sealing body. The sealing body has a first member including a first face facing away from the columnar wound body, and a second member including a second face facing the columnar wound body. The other end of the first tab is welded to the first face of the first member to form a first welding portion that is positioned between the first face and the second face.

公开(公告)号：US20230327299A1

公开(公告)日：2023-10-12

申请号：US18044502

申请日：2021-09-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shinya GESHI ,  Shinichi SAKAMOTO ,  Kazumichi SHIMIZU ,  Kiyomi KOZUKI ,  Kazutoshi KOHIRA

IPC: H01M50/533 ,  H01M50/538 ,  H01M10/04 ,  H01M10/0587 ,  H01M10/0525

CPC classification number: H01M50/533 ,  H01M50/538 ,  H01M10/0431 ,  H01M10/0587 ,  H01M10/0525

Abstract: A power storage device includes a first electrode having an elongated sheet first current collector, and a first active material layer carried on the first current collector, an elongated sheet second electrode, a separator interposed between the first electrode and the second electrode, a non-aqueous electrolyte, and a first current collecting portion electrically connected to the first current collector, wherein the first electrode, the second electrode, and the separator form a columnar wound body, one end portion along a longitudinal direction of the first current collector is a first exposed portion not having the first active material layer and projected from one end face of the wound body, the first current collecting portion has a porous metal portion, and one or more projected portions that are pressed into the porous metal portion, and the porous metal portion fills the gap of the first exposed portion.

公开(公告)号：US20230361357A1

公开(公告)日：2023-11-09

申请号：US18044313

申请日：2021-09-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shinya GESHI ,  Shinichi SAKAMOTO ,  Kazumichi SHIMIZU ,  Kiyomi KOZUKI ,  Kazutoshi KOHIRA

IPC: H01M10/0587 ,  H01M50/538 ,  H01M50/528

CPC classification number: H01M10/0587 ,  H01M50/538 ,  H01M50/528

Abstract: A power storage device includes a first electrode having a strip first current collector and a first active material layer carried on the first current collector, a second electrode having a strip second current collector and a second active material layer carried on the second current collector, and a separator interposed between the first electrode and the second electrode. The first electrode, the second electrode, and the separator form a columnar wound body. The first current collector has a plurality of first tabs electrically connected to one end along the longitudinal direction of the first current collector and extending radially inward of the wound body. The first tab has a proximal end portion connected to the first current collector, and a first wide portion wider than the proximal end portion. The plurality of first tabs are overlapped and welded to each other at their first wide portions.

公开(公告)号：US20230327300A1

公开(公告)日：2023-10-12

申请号：US18044510

申请日：2021-09-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shinya GESHI ,  Shinichi SAKAMOTO ,  Kazumichi SHIMIZU ,  Kiyomi KOZUKI ,  Kazutoshi KOHIRA

IPC: H01M50/533 ,  H01M50/538

CPC classification number: H01M50/533 ,  H01M50/538

Abstract: A power storage device has a columnar wound body in which a first and second electrode are placed on top of another with a separator interposed therebetween. The first electrode has a first portion, a second portion, and a first connection portion that connects the first and second portion, and the first and second portion face each other. The first connection portion is provided in a band region of the first current collector along the winding direction of the wound body, as a first exposed portion not having the first active material layer and exposing the first current collector. The first and second portions are portions each having the first active material layer at both sides of the first connection portion. The second electrode is sandwiched by the first portion and the second portion with the separator interposed therebetween, and wound along the winding direction to form the wound body.

公开(公告)号：US20210167455A1

公开(公告)日：2021-06-03

申请号：US17175411

申请日：2021-02-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Oose OKUTANI ,  Shinichi SAKAMOTO

IPC: H01M50/213 ,  B23K20/10 ,  H01M50/10 ,  H01M50/502 ,  H01M50/543

Abstract: A battery module includes a plurality of battery cells each having a terminal, and a lead plate having a lead part each of which is joined to the terminal of each of the battery cells to electrically connect the battery cells to each other. The lead part includes an aluminum thin plate having aluminum purity higher than or equal to 99.0%. Surface roughness Ra of a joining surface of the lead part to the terminal is less than or equal to 10 μm. The lead part is electrically connected to the terminal by solid-phase bonding.