公开(公告)号：US20240194953A1

公开(公告)日：2024-06-13

申请号：US18552194

申请日：2022-03-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： KIYOMI KOZUKI ,  SHINYA GESHI ,  SHINICHI SAKAMOTO

IPC: H01M10/0587 ,  H01G11/26 ,  H01G11/52 ,  H01G11/56 ,  H01G11/66 ,  H01M4/13 ,  H01M10/0525 ,  H01M50/533 ,  H01M50/536 ,  H01M50/538 ,  H01M50/586

CPC classification number: H01M10/0587 ,  H01G11/26 ,  H01G11/52 ,  H01G11/56 ,  H01G11/66 ,  H01M4/13 ,  H01M10/0525 ,  H01M50/533 ,  H01M50/536 ,  H01M50/538 ,  H01M50/586

Abstract: A power storage device includes: a first electrode including a first current collector having an elongated sheet shape and a first active material layer supported on the first current collector; a second electrode including a second current collector having an elongated sheet shape and a second active material layer supported on the second current collector; a separator interposed between the first electrode and the second electrode; a non-aqueous electrolyte; and a first current collecting plate electrically connected to the first current collector, wherein the first electrode, the second electrode, and the separator constitute a columnar wound body, a first end in a longitudinal direction of the first current collector is a first exposed part not having the first active material layer and protruding from a first end surface of the wound body, a first tab extends from the first exposed part, the first tab covers at least a part of the first exposed part on an inner peripheral side inside the first tab, and the first current collector plate is welded to the first exposed part on an inner peripheral side inside the first tab via the first tab.

公开(公告)号：US20250023204A1

公开(公告)日：2025-01-16

申请号：US18682092

申请日：2022-09-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： KIYOMI KOZUKI ,  SHINICHI SAKAMOTO ,  SHINYA GESHI

IPC: H01M50/538 ,  H01M10/04 ,  H01M50/107

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 interposed between the first electrode and the second electrode. The first electrode, the second electrode, and the separator constitute a wound body having a columnar shape. The power storage device further includes a case having a cylindrical bottomed shape for accommodating the wound body, and a current collection plate electrically connected to the first electrode and the case. The first electrode has an overlapping region overlapping the current collection plate when viewed from a case axial direction and a non-overlapping region not overlapping the current collection plate when viewed from the axial direction. The first electrode and the current collection plate are electrically connected to each other in the overlapping region. The first current collector is provided in at least a part of the non-overlapping region, and has a contact part in contact with the case bottom.

公开(公告)号：US20230163387A1

公开(公告)日：2023-05-25

申请号：US17906620

申请日：2021-03-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SHINICHI SAKAMOTO ,  SHINYA GESHI

IPC: H01M50/191 ,  H01M50/107 ,  H01M50/188 ,  H01M50/184 ,  H01M50/566

CPC classification number: H01M50/191 ,  H01M50/107 ,  H01M50/188 ,  H01M50/184 ,  H01M50/566

Abstract: A battery includes: a case including a cylindrical part, a bottom part that closes one end part of the cylindrical part, and an opening edge part continuous with the other end part of the cylindrical part; an electrode assembly housed in the cylindrical part; and a sealing body fixed to the opening edge so as to seal an opening of the opening edge part, in which the sealing body including a sealing plate made of a first metal and a terminal member made of a second metal different from the first metal and held by the sealing plate is used. The sealing plate includes a fixing part to which the terminal member is fixed, a peripheral edge part in an annular shape located at a peripheral edge, and a thin part formed between the fixing part and the peripheral edge part. The fixing part includes a protrusion part protruding from an outer surface of the sealing plate, and the protrusion part is bent inward such that a part of the terminal member is sandwiched between the fixing part and the protrusion part.