Patents by Inventor Yohei Muroya
Yohei Muroya has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240088450Abstract: A flat-shaped winding electrode body in which a positive electrode plate and a negative electrode plate are wound with a separator interposed therebetween includes a positive electrode tab portion and a negative electrode tab portion at one end in a direction in which a winding axis of the winding electrode body extends. Two pieces of the flat-shaped winding electrode body are housed in a prismatic outer body so that the winding axis of each piece is disposed in a direction perpendicular to a sealing plate, and the positive electrode tab portion and the negative electrode tab portion are located on one end of the winding electrode body closer to the sealing plate than the other end.Type: ApplicationFiled: November 21, 2023Publication date: March 14, 2024Applicant: SANYO Electric Co., Ltd.Inventors: Kazuhiro Kitaoka, Masakazu Yamada, Yohei Muroya
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Patent number: 11862762Abstract: A flat-shaped winding electrode body in which a positive electrode plate and a negative electrode plate are wound with a separator interposed therebetween includes a positive electrode tab portion and a negative electrode tab portion at one end in a direction in which a winding axis of the winding electrode body extends. Two pieces of the flat-shaped winding electrode body are housed in a prismatic outer body so that the winding axis of each piece is disposed in a direction perpendicular to a sealing plate, and the positive electrode tab portion and the negative electrode tab portion are located on one end of the winding electrode body closer to the sealing plate than the other end.Type: GrantFiled: January 18, 2023Date of Patent: January 2, 2024Assignee: SANYO Electric Co., Ltd.Inventors: Kazuhiro Kitaoka, Masakazu Yamada, Yohei Muroya
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Publication number: 20230361353Abstract: 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.Type: ApplicationFiled: July 13, 2023Publication date: November 9, 2023Applicant: SANYO Electric Co., Ltd.Inventors: Yohei Muroya, Hiroshi Takabayashi, Tomokazu Yamanaka
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Patent number: 11742524Abstract: 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.Type: GrantFiled: January 3, 2020Date of Patent: August 29, 2023Assignee: SANYO Electric Co., Ltd.Inventors: Yohei Muroya, Hiroshi Takabayashi, Tomokazu Yamanaka
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Publication number: 20230155182Abstract: A flat-shaped winding electrode body in which a positive electrode plate and a negative electrode plate are wound with a separator interposed therebetween includes a positive electrode tab portion and a negative electrode tab portion at one end in a direction in which a winding axis of the winding electrode body extends. Two pieces of the flat-shaped winding electrode body are housed in a prismatic outer body so that the winding axis of each piece is disposed in a direction perpendicular to a sealing plate, and the positive electrode tab portion and the negative electrode tab portion are located on one end of the winding electrode body closer to the sealing plate than the other end.Type: ApplicationFiled: January 18, 2023Publication date: May 18, 2023Applicant: SANYO Electric Co., Ltd.Inventors: Kazuhiro Kitaoka, Masakazu Yamada, Yohei Muroya
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Publication number: 20230124030Abstract: A manufacturing method for the secondary battery includes a first preparation step for inserting a terminal formed in an oval like shape and having a cylindrical shaft part into an attachment hole formed on a sealing plate of the secondary battery, a second preparation step for arranging a conductive member on a surface at a side where the shaft part of the sealing plate protrudes, a first caulking step for using a caulking tool that includes a tip end part formed in an oval like shape and includes a base end part formed in a complete round shape whose diameter is larger than the tip end part, to insert the tip end part into the shaft part, so as to make the base end part expand an inner diameter of the shaft part, and a second caulking step for pressing an expanded portion of the shaft part to be flat.Type: ApplicationFiled: September 14, 2022Publication date: April 20, 2023Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.Inventors: Toshiki IMABORI, Yohei MUROYA, Kohji UMEMURA, Koshiro YONEDA
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Patent number: 11569524Abstract: Provided are a secondary battery and a battery pack including the secondary battery. A sealing plate has a positive electrode terminal attachment hole. A positive electrode terminal penetrates the positive electrode terminal attachment hole. An external conductive member is connected to a portion of the positive electrode terminal located on the battery outer side with respect to the sealing plate. The conduction path between a positive electrode plate and the positive electrode terminal is provided with a current interrupting mechanism. A first insulating member made of resin is disposed between the sealing plate and the positive electrode terminal. A second insulating member having higher thermal resistance than the first insulating member is disposed between the external conductive member and the sealing plate.Type: GrantFiled: April 21, 2021Date of Patent: January 31, 2023Assignee: SANYO Electric Co., Ltd.Inventors: Ryoichi Wakimoto, Yohei Muroya, Hiroyuki Yamada
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Patent number: 11569552Abstract: A flat-shaped winding electrode body in which a positive electrode plate and a negative electrode plate are wound with a separator interposed therebetween includes a positive electrode tab portion and a negative electrode tab portion at one end in a direction in which a winding axis of the winding electrode body extends. Two pieces of the flat-shaped winding electrode body are housed in a prismatic outer body so that the winding axis of each piece is disposed in a direction perpendicular to a sealing plate, and the positive electrode tab portion and the negative electrode tab portion are located on one end of the winding electrode body closer to the sealing plate than the other end.Type: GrantFiled: September 30, 2021Date of Patent: January 31, 2023Assignee: SANYO Electric Co., Ltd.Inventors: Kazuhiro Kitaoka, Masakazu Yamada, Yohei Muroya
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Patent number: 11539067Abstract: A secondary battery production method is provided, with which deformation of a current collector is reduced. The method produces a secondary battery including: an electrode assembly having positive and negative electrode plates; and a positive electrode current collector. The positive electrode plate includes a positive electrode core and a positive electrode active material layer, and the electrode assembly includes a positive electrode core-stacked portion. The method includes: an electrode assembly production step of producing the electrode assembly; and an ultrasonic bonding step of ultrasonically bonding the positive electrode current collector to the positive electrode core-stacked portion. The positive electrode current collector has a thin-walled portion.Type: GrantFiled: December 10, 2019Date of Patent: December 27, 2022Assignee: SANYO Electric Co., Ltd.Inventors: Yohei Muroya, Tomokazu Yamanaka, Takuya Yamawaki, Ryuhei Kai
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Patent number: 11424517Abstract: 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.Type: GrantFiled: December 6, 2019Date of Patent: August 23, 2022Assignee: SANYO Electric Co., Ltd.Inventors: Yohei Muroya, Hiroshi Takabayashi
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Patent number: 11342639Abstract: A secondary battery includes an electrode body that includes a positive electrode plate and a negative electrode plate; an outer body that houses the electrode body; a sealing plate that is made of metal and seals an opening of the outer body; and a positive electrode terminal that is electrically connected to the positive electrode plate. At least part of the positive electrode terminal is disposed on the battery outer side with respect to the sealing plate. An external insulating member made of resin is disposed between the sealing plate and the positive electrode terminal. The conduction path between the positive electrode plate and the positive electrode terminal is provided with a current interrupting mechanism. An electrically insulating, heat-resistant layer is disposed between the positive electrode terminal and the sealing plate.Type: GrantFiled: December 12, 2018Date of Patent: May 24, 2022Assignees: SANYO Electric Co., Ltd., Panasonic Holdings CorporationInventors: Yohei Muroya, Ryoichi Wakimoto, Hiroyuki Inoue, Keisuke Shimizu
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Publication number: 20220158311Abstract: A battery includes: a conductive member provided with a through hole; and a terminal member inserted in the through hole and having a tip portion exposed on the conductive member. A joined portion of the tip portion of the terminal member to the conductive member is formed. The joined portion includes a thick portion at which a thickness of the terminal member is relatively thick, and a thin portion at which the thickness of the terminal member is relatively thin.Type: ApplicationFiled: October 15, 2021Publication date: May 19, 2022Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.Inventors: Yohei MUROYA, Kohji UMEMURA, Toshiki IMABORI
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Patent number: 11283140Abstract: 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.Type: GrantFiled: August 23, 2019Date of Patent: March 22, 2022Assignee: SANYO Electric Co., Ltd.Inventors: Hiroshi Takabayashi, Yohei Muroya
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Publication number: 20220021086Abstract: A flat-shaped winding electrode body in which a positive electrode plate and a negative electrode plate are wound with a separator interposed therebetween includes a positive electrode tab portion and a negative electrode tab portion at one end in a direction in which a winding axis of the winding electrode body extends. Two pieces of the flat-shaped winding electrode body are housed in a prismatic outer body so that the winding axis of each piece is disposed in a direction perpendicular to a sealing plate, and the positive electrode tab portion and the negative electrode tab portion are located on one end of the winding electrode body closer to the sealing plate than the other end.Type: ApplicationFiled: September 30, 2021Publication date: January 20, 2022Applicant: SANYO Electric Co., Ltd.Inventors: Kazuhiro Kitaoka, Masakazu Yamada, Yohei Muroya
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Patent number: 11165125Abstract: A flat-shaped winding electrode body in which a positive electrode plate and a negative electrode plate are wound with a separator interposed therebetween includes a positive electrode tab portion and a negative electrode tab portion at one end in a direction in which a winding axis of the winding electrode body extends. Two pieces of the flat-shaped winding electrode body are housed in a prismatic outer body so that the winding axis of each piece is disposed in a direction perpendicular to a sealing plate, and the positive electrode tab portion and the negative electrode tab portion are located on one end of the winding electrode body closer to the sealing plate than the other end.Type: GrantFiled: February 19, 2019Date of Patent: November 2, 2021Assignee: SANYO Electric Co., Ltd.Inventors: Kazuhiro Kitaoka, Masakazu Yamada, Yohei Muroya
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Publication number: 20210242484Abstract: Provided are a secondary battery and a battery pack including the secondary battery. A sealing plate has a positive electrode terminal attachment hole. A positive electrode terminal penetrates the positive electrode terminal attachment hole. An external conductive member is connected to a portion of the positive electrode terminal located on the battery outer side with respect to the sealing plate. The conduction path between a positive electrode plate and the positive electrode terminal is provided with a current interrupting mechanism. A first insulating member made of resin is disposed between the sealing plate and the positive electrode terminal. A second insulating member having higher thermal resistance than the first insulating member is disposed between the external conductive member and the sealing plate.Type: ApplicationFiled: April 21, 2021Publication date: August 5, 2021Applicant: SANYO Electric Co., Ltd.Inventors: Ryoichi Wakimoto, Yohei Muroya, Hiroyuki Yamada
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Patent number: 11081752Abstract: A square secondary battery includes an electrode body including a positive electrode plate and a negative electrode plate, a square outer package housing the electrode body, a metal sealing plate sealing an opening of the square outer package, and a positive electrode collector electrically connected to the positive electrode plate and the sealing plate. The positive electrode collector includes a base portion disposed to oppose the sealing plate, and a lead portion extending from an edge portion of the base portion towards the electrode body. In a short direction of the sealing plate, a boundary between the base portion and the lead portion is positioned on a first side with respect to a center of the sealing plate, and a connection between the sealing plate and the base portion of the positive electrode collector is offset to a second side with respect to the center of the sealing plate.Type: GrantFiled: November 16, 2017Date of Patent: August 3, 2021Assignee: SANYO ELECTRIC CO., LTD.Inventors: Yohei Muroya, Shinichirou Yoshida, Hiroshi Maesono
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Patent number: 11018367Abstract: Provided are a secondary battery and a battery pack including the secondary battery. A sealing plate has a positive electrode terminal attachment hole. A positive electrode terminal penetrates the positive electrode terminal attachment hole. An external conductive member is connected to a portion of the positive electrode terminal located on the battery outer side with respect to the sealing plate. The conduction path between a positive electrode plate and the positive electrode terminal is provided with a current interrupting mechanism. A first insulating member made of resin is disposed between the sealing plate and the positive electrode terminal. A second insulating member having higher thermal resistance than the first insulating member is disposed between the external conductive member and the sealing plate.Type: GrantFiled: January 23, 2019Date of Patent: May 25, 2021Assignee: SANYO Electric Co., Ltd.Inventors: Ryoichi Wakimoto, Yohei Muroya, Hiroyuki Yamada
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Patent number: 10964923Abstract: A prismatic secondary battery includes an electrode body including a positive-electrode sheet and a negative-electrode sheet, a prismatic exterior body that accommodates the electrode body, a sealing plate that seals an opening of the prismatic exterior body, and a negative terminal electrically connected to the negative-electrode sheet. The prismatic secondary battery is arranged such that the sealing plate extends in the vertical direction during use of the prismatic secondary battery. The positive-electrode sheet is electrically connected to the sealing plate. The sealing plate has a recessed portion on an outer surface and a terminal insertion hole formed in the recessed portion. The negative terminal is inserted in the terminal insertion hole. An outer insulating member is disposed between the negative terminal and the sealing plate. The sealing plate has a first groove extending to an end of the recessed portion in the longitudinal direction of the sealing plate.Type: GrantFiled: May 29, 2018Date of Patent: March 30, 2021Assignee: SANYO Electric Co., Ltd.Inventors: Yohei Muroya, Kazuki Takeno, Mitsuhiro Okada
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Patent number: 10957883Abstract: A prismatic secondary battery includes an electrode body including a positive-electrode sheet and a negative-electrode sheet, a prismatic exterior body that accommodates the electrode body, a sealing plate that seals an opening of the prismatic exterior body, and a negative terminal electrically connected to the negative-electrode sheet. The positive-electrode sheet is electrically connected to the sealing plate. The sealing plate has a recessed portion on an outer surface and a terminal insertion hole formed in the recessed portion. The negative terminal is inserted in the terminal insertion hole. An outer insulating member is disposed between the negative terminal and the sealing plate. The sealing plate has a first groove extending to an end of the recessed portion in the longitudinal direction of the sealing plate.Type: GrantFiled: May 29, 2018Date of Patent: March 23, 2021Assignee: SANYO Electric Co., Ltd.Inventors: Yohei Muroya, Kazuki Takeno, Mitsuhiro Okada