公开(公告)号：US20230361353A1

公开(公告)日：2023-11-09

申请号：US18221482

申请日：2023-07-13

Applicant: SANYO Electric Co., Ltd.

Inventor： Yohei Muroya ,  Hiroshi Takabayashi ,  Tomokazu Yamanaka

IPC: H01M10/058 ,  H01M10/04 ,  H01M50/531 ,  H01M50/567 ,  H01M50/566

CPC classification number: H01M10/058 ,  H01M10/0468 ,  H01M10/0413 ,  H01M50/531 ,  H01M50/567 ,  H01M50/566 ,  H01M50/562

Abstract: A positive electrode terminal is inserted into a current-collector through hole formed in a positive electrode current collector and riveted in a spot-faced hole formed in the positive electrode current collector. A protrusion is formed on a bottom surface of the spot-faced hole so as to extend around the current-collector through hole, and a riveted portion of the positive electrode terminal covers the protrusion. The riveted portion of the positive electrode terminal is weld-connected to an edge of the spot-faced hole.

公开(公告)号：US11424517B2

公开(公告)日：2022-08-23

申请号：US16705447

申请日：2019-12-06

Applicant: SANYO Electric Co., Ltd.

Inventor： Yohei Muroya ,  Hiroshi Takabayashi

IPC: H01M50/543 ,  H01M50/20 ,  H01M50/502 ,  H01M50/528

Abstract: A negative electrode terminal includes a flange, and a connection portion disposed on a first surface of the flange. The connection portion is inserted into a terminal attachment hole. The negative electrode terminal includes a first area made of aluminium or an aluminium alloy, and a second area made of copper or a copper alloy. In the flange, the second area is disposed adjacent to the first surface, and the first area is disposed adjacent to the second surface. A boundary between the first area and the second area is disposed between the first surface and the second surface. A thinnest portion of the first area of the flange in the thickness direction of the flange has a thickness of larger than or equal to 0.3 mm. An external electroconductive member made of aluminium or an aluminium alloy is welded to the flange to form a welded portion.

公开(公告)号：US20210367311A1

公开(公告)日：2021-11-25

申请号：US17396920

申请日：2021-08-09

Applicant: SANYO Electric Co., Ltd.

Inventor： Hiroshi Takabayashi ,  Hiroyuki Yamada

IPC: H01M50/60 ,  H01M10/04 ,  H01M50/147 ,  H01M50/172

Abstract: Provided is an electricity storage device having a high volumetric energy density and high reliability. The electricity storage device includes: an electrode assembly including first and second electrode plates and a separator interposed therebetween; an exterior housing that houses the electrode assembly; a lid that covers an opening of the exterior housing; and electrode terminals that are electrically connected to the electrode assembly and partially protrude from the lid to the outside. The lid has a liquid injection hole for injecting an electrolytic solution into the exterior housing. A tubular member extending from the lid toward the electrode assembly is provided between the outer surface of the lid and the electrode assembly so as to surround an opening of the liquid injection hole. A covering member connected to the tubular member and interposed between the liquid injection hole and the electrode assembly is provided.

公开(公告)号：US11121440B2

公开(公告)日：2021-09-14

申请号：US16255461

申请日：2019-01-23

Applicant: SANYO Electric Co., Ltd.

Inventor： Hiroshi Takabayashi ,  Hiroyuki Yamada

IPC: H01M50/60 ,  H01M50/147 ,  H01M50/172 ,  H01M10/04

Abstract: Provided is an electricity storage device having a high volumetric energy density and high reliability. The electricity storage device includes: an electrode assembly including first and second electrode plates and a separator interposed therebetween; an exterior housing that houses the electrode assembly; a lid that covers an opening of the exterior housing; and electrode terminals that are electrically connected to the electrode assembly and partially protrude from the lid to the outside. The lid has a liquid injection hole for injecting an electrolytic solution into the exterior housing. A tubular member extending from the lid toward the electrode assembly is provided between the outer surface of the lid and the electrode assembly so as to surround an opening of the liquid injection hole. A covering member connected to the tubular member and interposed between the liquid injection hole and the electrode assembly is provided.

公开(公告)号：US20190181417A1

公开(公告)日：2019-06-13

申请号：US16209568

申请日：2018-12-04

Applicant: SANYO Electric Co., Ltd.

Inventor： Ryoichi Wakimoto ,  Hiroshi Takabayashi

IPC: H01M2/34 ,  H01M2/02 ,  H01M2/10 ,  H01M2/04 ,  H01M10/04

Abstract: A positive electrode collector has a part connected to a positive electrode terminal and a part connected to a positive electrode tab. In the positive electrode collector, a fuse portion is provided between the part connected to the positive electrode terminal and the part connected to the positive electrode tab. In the positive electrode collector, a region closer to the part connected to the positive electrode terminal than the fuse portion is referred to as a first region, and a region closer to the part connected to the positive electrode tab than the fuse portion is referred to as a second region. An insulating plate as an insulating member disposed between the positive electrode collector and an electrode body is connected to the second region, and the second region is prevented from moving toward the first region after the fuse portion blows.

公开(公告)号：US20240213513A1

公开(公告)日：2024-06-27

申请号：US18598253

申请日：2024-03-07

Applicant: SANYO Electric Co., Ltd.

Inventor： Hiroshi Takabayashi ,  Hiroyuki Yamada

IPC: H01M10/04 ,  H01M50/103 ,  H01M50/147 ,  H01M50/176 ,  H01M50/531 ,  H01M50/55 ,  H01M50/553 ,  H01M50/593 ,  H01M50/627

CPC classification number: H01M10/0413 ,  H01M50/103 ,  H01M50/147 ,  H01M50/176 ,  H01M50/531 ,  H01M50/55 ,  H01M50/553 ,  H01M50/593 ,  H01M50/627 ,  H01M2220/20

Abstract: Provided is an electricity storage device having a high volumetric energy density and high reliability. The electricity storage device includes: an electrode assembly including first and second electrode plates and a separator interposed therebetween; an exterior housing that houses the electrode assembly; a lid that covers an opening of the exterior housing; and electrode terminals that are electrically connected to the electrode assembly and partially protrude from the lid to the outside. The lid has a liquid injection hole for injecting an electrolytic solution into the exterior housing. A tubular member extending from the lid toward the electrode assembly is provided between the outer surface of the lid and the electrode assembly so as to surround an opening of the liquid injection hole. A covering member connected to the tubular member and interposed between the liquid injection hole and the electrode assembly is provided.

公开(公告)号：US20230087148A1

公开(公告)日：2023-03-23

申请号：US17909416

申请日：2021-02-08

Applicant: SANYO Electric Co., Ltd.

Inventor： Hiroshi Takabayashi ,  Ryuhei Kai

IPC: H01M10/04 ,  H01M50/46 ,  H01M10/0587

Abstract: Wound positive-electrode core body exposed pails are bundled and connected to a positive-electrode collector body. A tape is affixed straddling a separator positioned on the outermost surface of a winding electrode body, and the outermost surface of the wound positive-electrode core body exposed parts. The tape has a porous base material and an adhesive layer provided on the base material. The tape has a region in which the adhesive layer b is not provided on the base material a between the connection part between the tape and the separator positioned on the outermost surface of the winding electrode body, and the connection part between the tape and the outermost surface of the wound positive-electrode core body exposed parts.

公开(公告)号：US11283140B2

公开(公告)日：2022-03-22

申请号：US16549302

申请日：2019-08-23

Applicant: SANYO Electric Co., Ltd.

Inventor： Hiroshi Takabayashi ,  Yohei Muroya

IPC: H01M50/543 ,  H01M50/183

Abstract: A negative electrode includes a first region formed of a first material and a second region formed of a second material having a different ionization tendency from the first material. The negative electrode terminal includes a flange that is disposed so as to face the outer surface of a sealing plate. A sealing plate side insulating member is disposed between the flange and the sealing plate. A boundary between the first region and the second region has an exposed part that is exposed to the outside, and the exposed part is positioned at an opposite corner on the periphery of the flange to the sealing plate.

公开(公告)号：US10833372B2

公开(公告)日：2020-11-10

申请号：US16012173

申请日：2018-06-19

Applicant: SANYO Electric Co., Ltd.

Inventor： Ryoichi Wakimoto ,  Hiroshi Takabayashi

IPC: H01M10/28 ,  H01M4/525 ,  H01M4/505 ,  H01M4/62 ,  H01M2/26 ,  H01M2/08 ,  H01M4/66 ,  H01M2/30 ,  H01M2/22 ,  H01M2/34 ,  H01M2/02 ,  H01M4/02 ,  H01M10/052 ,  H01M10/0587

Abstract: An electrode body, which includes a positive electrode plate and a negative electrode plate, is contained in a battery case, which is composed of a rectangular casing and a sealing plate. A first positive-electrode tab group, which is composed of a plurality of positive electrode tabs, and a second positive-electrode tab group, which is composed of a plurality of positive electrode tabs, are disposed between the sealing plate and the electrode body. The first positive-electrode tab group and the second positive-electrode tab group are disposed so as to be displaced from each other in the longitudinal direction of the sealing plate. The first positive-electrode tab group and the second positive-electrode tab group are connected to different positions on a positive-electrode current collector.

公开(公告)号：US20200243868A1

公开(公告)日：2020-07-30

申请号：US16708580

申请日：2019-12-10

Applicant: SANYO Electric Co., Ltd.

Inventor： Hiroshi Takabayashi ,  Shinichirou Yoshida

IPC: H01M4/70 ,  H01M4/66 ,  H01M4/04

Abstract: A highly reliable secondary battery is provided, in which a short circuit between a positive electrode plate and a negative electrode plate is prevented. The negative electrode plate includes a negative electrode core and a negative electrode active material layer formed on the negative electrode core. An electrode assembly includes a negative electrode core-stacked portion including stacked layers of the negative electrode core, and the negative electrode core-stacked portion is joined to a first surface of the negative electrode current collector to form a joined portion. The irregularity-formed portion is formed on a second surface of the negative electrode current collector that is opposite to the first surface and is located in a portion of the negative electrode current collector in which the joined portion is formed. A sheet member used as a cover member is disposed on the second surface so as to cover the irregularity-formed portion.