Patents by Inventor Ryoichi Wakimoto

Ryoichi Wakimoto 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).

  • Patent number: 11342637
    Abstract: A secondary battery including external terminals provided on an outer side of a sealing plate of a battery case, lead terminals provided on an inner side of the sealing plate, the lead terminals connected to the external terminals being fixed to the sealing plate, collector members disposed on the inner side of the sealing plate, the collector members being connected to the lead terminals, and pluralities of collector tabs connected to a positive electrode plate and a negative electrode plate at an end portion of an electrode body. The pluralities of collector tabs are connected to the collector members, and the electrode body is accommodated inside the battery case while having the pluralities of collector tabs be in a bent state in an inner space defined by the sealing plate.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: May 24, 2022
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hiroyuki Yamada
  • Publication number: 20220140453
    Abstract: Disclosed here is a battery including: an exterior body having a bottom wall; and a winding electrode body in which positive electrode, negative electrode and separator are wound about a winding axis. The winding electrode body has a flat shape having a pair of curvature parts having a curved outside surface and a flat part that connects the pair of curvature parts to each other and has a flat outside surface. When a line perpendicular to the winding axis of the winding electrode body and perpendicular to the bottom wall of the exterior body is assumed as L1, a portion positioned at an outermost periphery of the negative electrode in at least one of the pair of the curvature parts faces a portion positioned on a winding inner peripheral side of the negative electrode via the separator and not via the positive electrode on the line L1.
    Type: Application
    Filed: November 4, 2021
    Publication date: May 5, 2022
    Inventors: Tomoyuki YAMADA, Takashi HOSOKAWA, Ryoichi WAKIMOTO
  • Publication number: 20220140452
    Abstract: A battery disclosed herein includes an exterior body, a sealing plate sealing an opening of the exterior body, electrode bodies each including a first electrode, an electrode tab group electrically connected to the first electrodes, a terminal attached to the sealing plate and electrically connected to the electrode tab group, a collecting unit electrically connecting the electrode tab rid the terminal, and an insulating member insulating the sealing plate and the collecting unit from each other. The insulating member includes a base portion disposed between the sealing plate and the collecting unit, and protrusion portions protruding, from the sealing plate toward the sides of the electrode bodies.
    Type: Application
    Filed: November 1, 2021
    Publication date: May 5, 2022
    Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventor: Ryoichi WAKIMOTO
  • Patent number: 11316235
    Abstract: An electrode body including positive electrode plate and negative electrode plate includes a positive electrode tab portion at an end portion on the sealing plate side. The positive electrode plate is electrically connected to a positive electrode collector including a collector body portion and a collector connection. A pressure-sensitive current breaking mechanism includes a conductive member including an opening portion on an electrode body side, a deformation plate that seals the opening portion, and a collector body portion that is disposed on the electrode body side of the deformation plate and that is connected to the deformation plate. The collector connection is disposed between the current breaking mechanism and one of the large-area side walls of the prismatic outer package, and the positive electrode tab portion is connected to the collector connection.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: April 26, 2022
    Assignees: SANYO Electric Co., Ltd., Panasonic Corporation
    Inventors: Ryoichi Wakimoto, Kazuhiro Kitaoka, Isao Fujiwara, Hiromasa Yagi
  • Patent number: 11289780
    Abstract: To provide a square secondary battery with a high reliability. A square secondary battery (20) including an electrode body (3) having a positive electrode plate and a negative electrode plate, a square outer package (1) that includes an opening and that houses the electrode body (3), and a sealing plate (2) that seals the opening of the square outer package (1), in which an inner side insulating member (12) serving as a first insulating member is disposed between the sealing plate (2) and a negative electrode collector member (8) and is fixed to the sealing plate (2), and in which a second insulating member (80) disposed between the sealing plate (2) and the electrode body (3) is connected to the inner side insulating member (12) serving as the first insulating member.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: March 29, 2022
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hiroyuki Yamada
  • Patent number: 11289734
    Abstract: A method for producing a secondary battery including an electrode body having a positive electrode plate and a negative electrode plate, a prismatic outer body having an opening and houses the electrode body, a sealing plate that seals the opening of the prismatic outer body, and a positive electrode external terminal that is electrically connected to the positive electrode plate and attached to the sealing plate. The method includes a fixation step of electrically connecting a first positive electrode current collector to a positive electrode external terminal and fixing the first positive electrode current collector to the sealing plate, a first connection step of weld-connecting a stack of a plurality of positive electrode tabs to the second positive electrode current collector, and a second connection step of weld-connecting the first positive electrode current collector to the second positive electrode current collector after the fixation step and the first connection step.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: March 29, 2022
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Atsushi Tsuji
  • Publication number: 20220094020
    Abstract: A stacked secondary battery having an electrode body in which at least one positive and at least one negative plate are stacked, with a multilayered separator interposed, said separator including two porous layers of different materials; and an outer packaging case housing an insulating holder and an electrolyte together, said insulating holder housing the electrode body and being formed of overlapping sheets comprises an insulating material. The outer packaging case has a bottom surface, a plurality of side walls that are provided standing upright from the bottom surface, and an opening that is opposite from the bottom surface. In at least one separator, a section that is exposed from end surfaces of active material mixture layers and metal foil-comprising core bodies of the positive plate and the negative plate is in contact with the vicinity of a bottom line of a valley section that is formed from the sheet.
    Type: Application
    Filed: November 27, 2019
    Publication date: March 24, 2022
    Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.
    Inventors: Hideo Kasahara, Ryosuke Iwata, Ryoichi Wakimoto
  • Publication number: 20220085462
    Abstract: According to the present disclosure, a terminal with improved conduction reliability is provided. The terminal disclosed herein includes a first conductive member that has a plate shape, a second conductive member electrically connected to the first conductive member, and a first fastening portion and a second fastening portion that mechanically fix the first conductive member and a flange portion of the second conductive member. The second fastening portion is provided further toward a center side of the flange portion than the first fastening portion when seen in a plan view.
    Type: Application
    Filed: September 8, 2021
    Publication date: March 17, 2022
    Inventors: Ryoichi WAKIMOTO, Eiichi FUJITA, Taiki NAKAGAWA
  • Publication number: 20220085464
    Abstract: Provided is a terminal of improved conduction reliability. The terminal disclosed herein has a plate-shaped first conductive member; a second conductive member electrically connected to the first conductive member; a fastening portion at which there are mechanically fixed the first conductive member and a flange portion of the second conductive member; and a metal joint in which the first conductive member and the flange portion of the second conductive member are metal-joined, at a position spaced from the fastening portion.
    Type: Application
    Filed: August 25, 2021
    Publication date: March 17, 2022
    Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventor: Ryoichi WAKIMOTO
  • Patent number: 11264679
    Abstract: A secondary battery includes an electrode body that includes a positive-electrode sheet and a negative-electrode sheet, an exterior body that accommodates the electrode body, a sealing plate that seals an opening of the exterior body, a positive-electrode terminal that is secured to the sealing plate, a positive-electrode tab that is connected to the positive-electrode sheet, a first positive-electrode current collector that is connected to the positive-electrode terminal and electrically connected to the positive-electrode tab, an inner insulating member that is disposed between the sealing plate and the first positive-electrode current collector, and a cover that is composed of a resin and disposed between the first positive-electrode current collector and the electrode body. The cover includes a cover portion that faces the first positive-electrode current collector and a cover joint that extends from the cover portion toward the sealing plate. The cover joint is connected to the inner insulating member.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: March 1, 2022
    Assignee: SANYO Electric Co., Ltd.
    Inventor: Ryoichi Wakimoto
  • Publication number: 20220059907
    Abstract: A welding structure of metal members includes a first member having a first opposing surface, a second member having a second opposing surface, and a welding portion fixing the first member and the second member to each other. A gap is formed between the first opposing surface and the second opposing surface. R1>R2 is satisfied where R1 represents a width of the welding portion in the gap and R2 represents a width of the welding portion on the first opposing surface of the first member. T2>T1 is satisfied where T2 represents a thickness of the second member in the portion where the welding portion is formed and T1 represents a thickness of the first member in the portion where the welding portion is formed. 0.8?D1/T1?1.2 is satisfied where D1 represents a depth of the welding portion in the second member from the second opposing surface.
    Type: Application
    Filed: August 10, 2021
    Publication date: February 24, 2022
    Inventors: Takafumi TSUJIGUCHI, Kazuki OSHIMA, Ryoichi WAKIMOTO, Hiroshi TAKABAYASHI
  • Publication number: 20220045391
    Abstract: A method of manufacturing a secondary battery includes the following steps. An insertion portion of a negative-electrode terminal is inserted into a terminal connection hole that is formed in a first negative-electrode current collector and crimped on a tapered portion to form a crimped portion. A gap is formed between the crimped portion and the tapered portion. Energy rays are radiated toward at least one of the crimped portion and the tapered portion to melt the at least one of the crimped portion and the tapered portion such that a melted metal flows into the gap. The melted metal is solidified to form a solidified portion, and the negative-electrode terminal and the first negative-electrode current collector are joined to each other. The solidified portion has a recessed portion.
    Type: Application
    Filed: October 25, 2021
    Publication date: February 10, 2022
    Applicant: SANYO Electric Co., Ltd.
    Inventor: Ryoichi Wakimoto
  • Patent number: 11245162
    Abstract: A tab derived from an electrode body and a terminal of a battery are electrically connected to each other using a collector. The collector includes a first conductive member connected to a tab-side conductive member, and a second conductive member connected to a terminal-side conductive member. The collector opposes a sealing plate with an insulating member in between. A through hole and a thin portion provided at a peripheral edge of the through hole are provided in either one of the first conductive member and the second conductive member. The through hole and the other one of the conductive members are overlapped to join the peripheral edge of the through hole and the other one of the conductive members to each other so that the thin portion becomes a fuse. An insulating material is provided between the first conductive member and the second conductive member.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: February 8, 2022
    Assignee: SANYO Electric Co., Ltd.
    Inventor: Ryoichi Wakimoto
  • Publication number: 20210399366
    Abstract: There is provided a prismatic power storage device having a reduced weight and ensuring a space for an electrode body that expands during charging, while the rigidity of an insulating sheet is ensured. A prismatic power storage device according to an aspect of the present disclosure includes: an electrode body (11) including a positive electrode plate, a negative electrode plate, and a separator disposed between the positive electrode plate and the negative electrode plate; an insulating holder (30) formed by shaping an insulating sheet (31) into a box shape and accommodating the electrode body (11); a prismatic outer case having an opening and accommodating the electrode body (11) and the insulating holder (30); and a sealing body sealing the opening of the outer case. The insulating sheet (31) includes a porous body.
    Type: Application
    Filed: October 10, 2019
    Publication date: December 23, 2021
    Applicants: SANYO Electric Co., Ltd., Panasonic Corporation
    Inventors: Ryoichi Wakimoto, Kazutaka Mita
  • Patent number: 11189874
    Abstract: A method of manufacturing a secondary battery includes the following steps. An insertion portion of a negative-electrode terminal is inserted into a terminal connection hole that is formed in a first negative-electrode current collector and crimped on a tapered portion to form a crimped portion. A gap is formed between the crimped portion and the tapered portion. Energy rays are radiated toward at least one of the crimped portion and the tapered portion to melt the at least one of the crimped portion and the tapered portion such that a melted metal flows into the gap. The melted metal is solidified to form a solidified portion, and the negative-electrode terminal and the first negative-electrode current collector are joined to each other. The solidified portion has a recessed portion.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: November 30, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventor: Ryoichi Wakimoto
  • Publication number: 20210336305
    Abstract: A conductive member is disposed on a side of the sealing plate adjacent to an electrode assembly with a first insulating member disposed therebetween. The conductive member has a conductive-member opening portion. The conductive-member opening portion of the conductive member is sealed by a deformation plate. The deformation plate is connected to a first positive-electrode current collector, which is electrically connected to positive electrode plates. A second insulating member is disposed between the deformation plate and the first positive-electrode current collector. Fixing projections and displacement prevention projections are provided on a surface of the second insulating member. The second insulating member is fixed to the first positive-electrode current collector such that the fixing projections are disposed in fixing holes in the first positive-electrode current collector.
    Type: Application
    Filed: January 23, 2018
    Publication date: October 28, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hirofumi Furukawa, Hiroyuki Yamada
  • Patent number: 11158902
    Abstract: To provide a highly reliable rectangular secondary battery. A rectangular secondary battery (20) includes: an electrode body (3) that includes a positive electrode plate and a negative electrode plate; a rectangular casing (1) that includes an opening and that contains the electrode body (3); and a sealing plate (2) that seals the opening of the rectangular casing (1). The sealing plate (2) includes a gas discharge valve (17) that ruptures when the pressure inside the rectangular casing (1) has a predetermined value or more to discharge gas inside the rectangular casing (1) to outside the rectangular casing (1). A portion of a second negative electrode current collector (8b) is disposed, as a shielding member, at a location that is between the sealing plate (2) and the electrode body (3) and that faces the gas discharge valve (17).
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: October 26, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hiroyuki Yamada
  • Publication number: 20210328311
    Abstract: A conductive member is disposed near a side of the sealing plate facing an electrode assembly with a first insulating member disposed therebetween. The conductive member has a conductive-member opening portion. The conductive member is connected to a positive electrode terminal that projects toward au outside of the battery from the sealing plate. The conductive-member opening portion of the conductive member is sealed by a deformation plate. The deformation plate is connected to a first positive-electrode current collector of a current collecting member, which is electrically connected to positive electrode plates. The deformation plate is deformed in response to an increase in pressure in a rectangular exterior body, and the conductive path between the positive electrode plate and the positive electrode terminal is broken in response to the deformation of the deformation plate. A cover is disposed between the first positive-electrode current collector and the electrode assembly.
    Type: Application
    Filed: January 23, 2018
    Publication date: October 21, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hirofumi Furukawa, Hiroyuki Yamada
  • Patent number: 11152673
    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.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: October 19, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hiroshi Takabayashi
  • Publication number: 20210305647
    Abstract: A secondary battery including an electrode body including a positive electrode plate and a negative electrode plate; an exterior body that has an opening and houses the electrode body; a sealing body that seals the opening; a terminal that is provided in the sealing body, and connected to the positive electrode plate or the negative electrode plate; and a conductive member that is disposed on an outer side of the sealing body, and is connected to the terminal. The conductive member has an overlap section in which one end of a conductive plate-shaped member is folded and opposed surfaces are overlaid on other, and a base section in which no surfaces are overlaid on other, and the terminal is connected to the conductive member in the base portion.
    Type: Application
    Filed: September 21, 2017
    Publication date: September 30, 2021
    Applicants: SANYO Electric Co., Ltd., Panasonic Corporation
    Inventors: Ryoichi Wakimoto, Eiji Hashimoto