公开(公告)号：US20220059911A1

公开(公告)日：2022-02-24

申请号：US17415139

申请日：2019-12-17

Applicant: SANYO Electric Co., Ltd.

Inventor： Kazuaki Tamura ,  Yoshifumi Magari ,  Atsutoshi Ako ,  Akira Nishida ,  Kentaro Tsukamoto ,  Tomoyuki Yamada

IPC: H01M50/54 ,  H01M10/0587 ,  H01M10/04 ,  H01M4/70 ,  H01M50/533 ,  B23K26/21 ,  H01M4/46

Abstract: A secondary battery provided with: a belt-like positive electrode plate having a plurality of positive electrode tabs; and a positive electrode current collector which is connected so that the plurality of positive electrode tabs are stacked, wherein the positive electrode plate has a positive electrode core body and a positive electrode active material layer formed on the positive electrode core bodies. At one edge side of the positive electrode plate where the plurality of positive electrode tabs are provided, one surface of the positive electrode core body has formed thereon a first protrusion that protrudes from said surface of the positive electrode core body in the thickness direction of the positive electrode core body, whereas the other surface of the positive electrode core body has no protrusion formed to protrude from said other surface of the positive electrode core body in the thickness direction of the positive electrode core body.

公开(公告)号：US12176530B2

公开(公告)日：2024-12-24

申请号：US17428558

申请日：2019-12-24

Applicant: SANYO Electric Co., Ltd.

Inventor： Kazuaki Tamura ,  Yoshifumi Magari ,  Atsutoshi Ako ,  Akira Nishida ,  Kentaro Tsukamoto ,  Tomoyuki Yamada

IPC: H01M4/46 ,  H01M4/02

Abstract: A positive electrode plate that has a positive electrode active material layer formed on a positive electrode core, wherein the positive electrode core has, on an edge side, a thick portion which has a thickness that is greater than the thickness of a portion of the positive electrode core that has the positive electrode active material layer formed on both sides, and the positive electrode plate has a first region that extends into the thick portion from the portion of the positive electrode core that has the positive electrode active material layer formed on both sides and a second region that is positioned outside the first region in the thick portion. The average maximum diameter of the metal crystal grains that compose the first region is smaller than those of the second region.

公开(公告)号：US20220021001A1

公开(公告)日：2022-01-20

申请号：US17414676

申请日：2019-12-17

Applicant: SANYO Electric Co., Ltd.

Inventor： Kazuaki Tamura ,  Yoshifumi Magari ,  Atsutoshi Ako ,  Akira Nishida ,  Kentaro Tsukamoto ,  Tomoyuki Yamada

IPC: H01M4/66 ,  H01M4/70 ,  H01M10/04 ,  H01M10/0585 ,  H01M50/533 ,  H01M50/103

Abstract: Provided are a highly reliable electrode plate and a secondary battery using the electrode plate. A positive electrode plate, which is for a secondary battery, has a positive electrode core body and a positive electrode active material layer formed on the positive electrode core body. The positive electrode core body has, at an end thereof, a thick part having a thickness larger than that of the center area of the positive electrode core body. The thick part includes a first projection that projects from one surface of the positive electrode core body in the thickness direction of the positive electrode core body. The positive electrode core body is formed of an aluminum alloy which contains 0.5-2.0 mass % of Mn.

公开(公告)号：US20220140308A1

公开(公告)日：2022-05-05

申请号：US17428391

申请日：2019-11-29

Applicant: SANYO Electric Co., Ltd.

Inventor： Akira Nishida ,  Yoshifumi Magari ,  Atsutoshi Ako ,  Daisuke Ikeda

IPC: H01M4/04 ,  H01M4/525 ,  H01M4/131 ,  H01M4/1391

Abstract: Disclosed is a method for manufacturing a positive electrode plate, wherein even when a positive electrode mix layer is densely compressed, the positive electrode plate is prevented from being so greatly bent that wrinkles created in non-coated regions during transport, winding, or lamination develop into deep winkles or cracks, thus avoiding the inability to transport or wind the positive electrode plate. This manufacturing method can provide a positive electrode plate having a positive electrode mix layer formed on the surface thereof, wherein the filling density of the positive electrode mix layer is at least 3.4 g/cm3, and the warpage amount h of the positive electrode plate in the width direction perpendicular to the longitudinal direction satisfies 0.0≤h≤3.0 mm per 1 m in the longitudinal direction.

公开(公告)号：US20220123296A1

公开(公告)日：2022-04-21

申请号：US17426831

申请日：2019-11-27

Applicant: SANYO Electric Co., Ltd.

Inventor： Atsutoshi Ako ,  Yoshifumi Magari ,  Kazuaki Tamura ,  Akira Nishida

IPC: H01M4/525 ,  H01M4/505 ,  H01M10/0587 ,  H01M10/0525 ,  H01M4/02

Abstract: The nonaqueous electrolyte secondary battery according to one embodiment includes a flat wound electrode body in which a positive plate and a negative plate are wound via a separator and characterized in that the positive plate has a positive core and a positive mixed material layer that is formed on both sides of the positive core, the positive mixed material layer includes a lithium metal composite oxide represented by general formula Li1+xMaO2+b (in the formula, x, a, and b satisfy the conditions x+a=1, −0.2

公开(公告)号：US20220109147A1

公开(公告)日：2022-04-07

申请号：US17428558

申请日：2019-12-24

Applicant: SANYO Electric Co., Ltd.

Inventor： Kazuaki Tamura ,  Yoshifumi Magari ,  Atsutoshi Ako ,  Akira Nishida ,  Kentaro Tsukamoto ,  Tomoyuki Yamada

IPC: H01M4/46

Abstract: A positive electrode plate that has a positive electrode active material layer formed on a positive electrode core, wherein the positive electrode core has, on an edge side, a thick portion which has a thickness that is greater than the thickness of a portion of the positive electrode core that has the positive electrode active material layer formed on both sides, and the positive electrode plate has a first region that extends into the thick portion from the portion of the positive electrode core that has the positive electrode active material layer formed on both sides and a second region that is positioned outside the first region in the thick portion. The average maximum diameter of the metal crystal grains that compose the first region is smaller than those of the second region.

公开(公告)号：US12034162B2

公开(公告)日：2024-07-09

申请号：US17426831

申请日：2019-11-27

Applicant: SANYO Electric Co., Ltd.

Inventor： Atsutoshi Ako ,  Yoshifumi Magari ,  Kazuaki Tamura ,  Akira Nishida

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/0587

CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2004/021 ,  H01M2004/028

Abstract: The nonaqueous electrolyte secondary battery according to one embodiment includes a flat wound electrode body in which a positive plate and a negative plate are wound via a separator and characterized in that the positive plate has a positive core and a positive mixed material layer that is formed on both sides of the positive core, the positive mixed material layer includes a lithium metal composite oxide represented by general formula Li1+xMaO2+b (in the formula, x, a, and b satisfy the conditions x+a=1, −0.2

公开(公告)号：US20220393250A1

公开(公告)日：2022-12-08

申请号：US17770811

申请日：2020-10-19

Applicant: SANYO Electric Co., Ltd.

Inventor： Kentaro Tsukamoto ,  Yoshifumi Magari

IPC: H01M10/0587 ,  H01M4/75 ,  H01M50/528 ,  H01M50/103 ,  H01M50/15 ,  H01M4/04 ,  H01M4/139

Abstract: An electrode plate which is to be contained in a wound or multilayer electrode body, and which is provided with: a band-like electrode plate core body; mixture layers that are formed on both surfaces of the electrode plate core body; and a tab that extends from one end of the electrode plate core body in the short-side direction. With respect to this electrode plate, the front edge of the electrode plate core body at the end from which the tab extends is covered by the mixture layers.

公开(公告)号：US20220200107A1

公开(公告)日：2022-06-23

申请号：US17603727

申请日：2020-04-24

Applicant: SANYO Electric Co., Ltd.

Inventor： Kentaro Tsukamoto ,  Atsutoshi Ako ,  Yoshifumi Magari

IPC: H01M50/533 ,  H01M10/0587

Abstract: This positive electrode plate, included in a rolled electrode body, is characterized by comprising a belt-shape positive electrode core, a positive electrode active material layer which, along the long direction of the positive electrode core, is formed in a belt shape on at least part of the surface of the positive electrode core, and a positive electrode tab which extends in the short direction of the positive electrode core from the active material layer-uncoated area of the surface of the positive electrode core where the positive electrode active material layer is not formed, and the root width H1 and the maximum width H2 of the positive electrode tab satisfy the relation 0.4×H2≤H1≤0.9×H2.