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).

  • Publication number: 20240195027
    Abstract: The secondary battery includes an electrode body that includes a positive electrode plate and a negative electrode plate, an outer body that has an opening and houses the electrode body, a sealing plate that seals the opening of the outer body, a positive electrode tab that is provided in the positive electrode plate, a positive electrode external terminal that is electrically connected to the positive electrode plate and attached to the sealing plate, and a positive electrode current collector and a second positive electrode current collector that electrically connect the positive electrode tab and the positive electrode external terminal. The first positive electrode current collector has a current collector protrusion. The second positive electrode current collector has a current collector opening. The current collector protrusion is positioned in the current collector opening. The current collector protrusion and the edge of the current collector opening are weld connected to each other.
    Type: Application
    Filed: February 22, 2024
    Publication date: June 13, 2024
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Atsushi Tsuji
  • Patent number: 12002998
    Abstract: A technology is provided which suppresses the movement of an electrode body inside of a battery case, and prevents the damage at a junction between an electrode tab group and a collector. A secondary battery herein disclosed includes an exterior body, a sealing plate, an electrode body, an electrode tab group, a terminal, and a collector. The collector has a first region part to be joined with the electrode tab group, a second region part to be joined with the terminal, and a third region part closer to the electrode body than the first region part.
    Type: Grant
    Filed: January 27, 2022
    Date of Patent: June 4, 2024
    Assignee: PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Yukio Harima, Ryoichi Wakimoto
  • Publication number: 20240178494
    Abstract: Provided is an electrical storage device, having high reliability of sealing properties in the vicinity of a through hole. The electrical storage device disclosed herein includes an electrode body, a case, and a first current collecting member. The case includes a first wall having a first through hole. The first current collecting member has a first region placed along the inner surface of the first wall. A projection part, projecting to the first wall, is in the first region. A part of the projection part is in the first through hole. The first current collecting member has a first slit is between the first region and a second region on the opposite site of the first side. The second region is placed along the inner surface of the first wall. The second region faces the inner surface of the first wall with the insulating member therebetween.
    Type: Application
    Filed: October 20, 2023
    Publication date: May 30, 2024
    Inventor: Ryoichi WAKIMOTO
  • Publication number: 20240178491
    Abstract: Provided is an electrical storage device, having a sealing part with high reliability. The electrical storage device disclosed herein includes an electrode body including a first electrode, a case, and a first current collecting member. The case includes a first wall having a first through hole. The first current collecting member has a first region placed along the inner surface of the first wall, a projection part, projecting to the first wall, is provided in the first region, and at least part of the projection part is placed in the first through hole. The terminal member is connected to the projection part, and the insulating member is an integral product having an insulating part placed between the first wall and the first current collecting member, and an insulating part placed between the first wall and the terminal member.
    Type: Application
    Filed: October 20, 2023
    Publication date: May 30, 2024
    Inventor: Ryoichi WAKIMOTO
  • Publication number: 20240145891
    Abstract: A method of manufacturing a secondary battery of a present disclosure includes a sealing step. At the sealing step, regarding a first area pressed by a pressing jig on a center in width directions of a pair of first side walls, a second area positioned at a sealing plate side more than the first area, and a third area positioned at a bottom part side more than the first area, in a case where distances in a thickness direction of the battery case directed from an outer surface of one of the first side walls toward an outer surface of the other one of the first side walls are respectively treated as T1, T2, and T3, the pair of first side walls are pressed by a pressing jig to make maximum values of them satisfy T2>T3>T1 to seal a liquid injection hole.
    Type: Application
    Filed: September 28, 2023
    Publication date: May 2, 2024
    Inventors: Takehiro OGURA, Yusuke TOMIMATSU, Ryoichi WAKIMOTO
  • Publication number: 20240145786
    Abstract: A battery disclosed herein includes a wound electrode body, a battery case having a substantially rectangular first surface, and an electrolytic solution injection hole formed on the first surface of the battery case, a sealing member for sealing the electrolytic solution injection hole, and an insulating member fixed to the first surface. The electrolytic solution injection hole is formed in a position that does not overlap with vertexes of the curved portions of the plurality of wound electrode bodies. Herein, a part of the insulating member is disposed in a valley portion surrounded by a surface linking the vertexes of the adjacent wound electrode bodies and the curved surface of the curved portion of the adjacent wound electrode bodies, and a part of the sealing member is disposed in the valley portion.
    Type: Application
    Filed: September 20, 2023
    Publication date: May 2, 2024
    Inventors: Yukinobu MIYAMURA, Ryoichi WAKIMOTO, Hiroaki IMANISHI
  • Patent number: 11942662
    Abstract: The secondary battery includes an electrode body that includes a positive electrode plate and a negative electrode plate, an outer body that has an opening and houses the electrode body, a sealing plate that seals the opening of the outer body, a positive electrode tab that is provided in the positive electrode plate, a positive electrode external terminal that is electrically connected to the positive electrode plate and attached to the sealing plate, and a positive electrode current collector and a second positive electrode current collector that electrically connect the positive electrode tab and the positive electrode external terminal. The first positive electrode current collector has a current collector protrusion. The second positive electrode current collector has a current collector opening. The current collector protrusion is positioned in the current collector opening. The current collector protrusion and the edge of the current collector opening are weld connected to each other.
    Type: Grant
    Filed: June 15, 2022
    Date of Patent: March 26, 2024
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Atsushi Tsuji
  • Patent number: 11923558
    Abstract: A rectangular secondary battery includes a rectangular casing that contains an electrode body, a sealing plate that seals an opening of the rectangular casing; a positive electrode tab group that is composed of a plurality of positive electrode tabs, a positive electrode terminal that is electrically connected to the positive electrode tab group and attached to the sealing plate, a second positive electrode current collector that is electrically connected to the positive electrode tab group and the positive electrode terminal, and a second insulator that is disposed between the sealing plate and the second positive electrode current collector. The sealing plate has a gas discharge valve. The sealing plate has a first recess. The second insulator has a first protrusion. In a transversal direction of the sealing plate, the first recess is displaced from a center of the sealing plate toward an end portion of the sealing plate.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: March 5, 2024
    Assignee: SANYO Electric Co., Ltd.
    Inventor: Ryoichi Wakimoto
  • Publication number: 20240039131
    Abstract: A herein disclosed terminal includes a first conductive member and a second conductive member that is electrically connected to the first conductive member. The first conductive member and the second conductive member are composed of mutually different metals. The first conductive member includes a penetration hole. The second conductive member is arranged to cover the penetration hole. Then, a boundary part between a vicinity of the penetration hole of the first conductive member and the second conductive member is covered with a tape and/or a resin member to prevent the boundary part from being exposed.
    Type: Application
    Filed: July 27, 2023
    Publication date: February 1, 2024
    Inventors: Ichirou MURATA, Ryoichi WAKIMOTO
  • Publication number: 20230369692
    Abstract: A battery disclosed herein includes: an electrode body including a positive electrode and a negative electrode; an electrolytic solution; a battery case housing the electrode body, storing the electrolytic solution, and including an electrolytic solution injection hole; and a sealing member connected to a portion of the battery case defining a peripheral edge of the electrolytic solution injection hole, such that the electrolytic solution injection hole is sealed with the sealing member. A surface of the battery case facing the electrode body includes a protrusion located around the electrolytic solution injection hole and protruding toward the electrode body.
    Type: Application
    Filed: May 9, 2023
    Publication date: November 16, 2023
    Inventor: Ryoichi WAKIMOTO
  • Publication number: 20230352799
    Abstract: A secondary battery includes a battery case housing a flat electrode body and a sealing plate. The electrode body is housed in the battery case such that a winding axis thereof is parallel with a longitudinal direction of the sealing plate. At an end portion of the electrode body in a winding axis direction thereof, an edge of a positive or negative electrode plate is connected to an external terminal fixed to the sealing plate through a current collector. An insulating pressing member is arranged between the sealing plate and the electrode body. The pressing member presses the electrode body in a direction perpendicular to the winding axis such that a distance between a portion of the electrode body contacting the pressing member and the sealing plate is longer than a distance between the end portion of the electrode body in the winding axis direction thereof and the sealing plate.
    Type: Application
    Filed: January 19, 2021
    Publication date: November 2, 2023
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Yuma Kamiyama, Ryoichi Wakimoto
  • Patent number: 11791520
    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: Grant
    Filed: August 10, 2021
    Date of Patent: October 17, 2023
    Assignee: PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Takafumi Tsujiguchi, Kazuki Oshima, Ryoichi Wakimoto, Hiroshi Takabayashi
  • Publication number: 20230327214
    Abstract: A method of manufacturing a secondary battery including an electrode body element fabricating step in which a first electrode body element including a positive electrode plate and a negative electrode plate, and a second electrode body element including a positive electrode plate and a negative electrode plate are fabricated, a tab-connecting step in which a first positive electrode tab group of the first electrode body element and a second positive electrode tab group of the second electrode body element are connected to a second positive electrode collector, and a first negative electrode tab group of the first electrode body element and a second negative electrode tab group of the second electrode body element are connected to a second negative electrode collector, and an electrode body fabricating step in which, after the tab-connecting step, the first electrode body element and the second electrode body element are unified.
    Type: Application
    Filed: June 14, 2023
    Publication date: October 12, 2023
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Atsushi Tsuji
  • Publication number: 20230299397
    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: May 24, 2023
    Publication date: September 21, 2023
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hirofumi Furukawa, Hiroyuki Yamada
  • Publication number: 20230291083
    Abstract: Provided is technique to suppress inside short circuit of a battery. A herein disclosed battery includes an electrode body, a battery case, and a first electrical collector member. The electrode body includes a first electrode, a second electrode, and a first electrode tab group connected to the first electrode. The battery case includes an outer package and a sealing plate. The outer package is configured to accommodate the electrode body and includes an opening. The sealing plate is configured to seal the opening. The first electrical collector member is connected to the first electrode tab group. The first electrical collector member includes a first area that is arranged along a surface at the electrode body side of the sealing plate. A first insulating member is arranged between the sealing plate and the first area. A second insulating member is arranged between the first area and the electrode body.
    Type: Application
    Filed: March 1, 2023
    Publication date: September 14, 2023
    Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventor: Ryoichi WAKIMOTO
  • Patent number: 11715846
    Abstract: A method of manufacturing a secondary battery including an electrode body element fabricating step in which a first electrode body element including a positive electrode plate and a negative electrode plate, and a second electrode body element including a positive electrode plate and a negative electrode plate are fabricated, a tab-connecting step in which a first positive electrode tab group of the first electrode body element and a second positive electrode tab group of the second electrode body element are connected to a second positive electrode collector, and a first negative electrode tab group of the first electrode body element and a second negative electrode tab group of the second electrode body element are connected to a second negative electrode collector, and an electrode body fabricating step in which, after the tab-connecting step, the first electrode body element and the second electrode body element are unified.
    Type: Grant
    Filed: July 22, 2022
    Date of Patent: August 1, 2023
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Atsushi Tsuji
  • Patent number: 11699825
    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: Grant
    Filed: January 23, 2018
    Date of Patent: July 11, 2023
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hirofumi Furukawa, Hiroyuki Yamada
  • Publication number: 20230207860
    Abstract: A technology for obtaining a battery including a wound electrode body with high productivity is provided. In a preferred aspect of the battery manufacturing method disclosed herein, the method includes: winding a separator, a first electrode, and a second electrode around a winding core to produce a wound body; molding the wound body into a flat shape; and arranging, in a battery case, the wound electrode body produced.
    Type: Application
    Filed: December 23, 2022
    Publication date: June 29, 2023
    Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Tomoyuki YAMADA, Takashi HOSOKAWA, Ryoichi WAKIMOTO
  • Publication number: 20230207986
    Abstract: A highly reliable battery where multiple tabs and current collecting units are stably connected is provided. In a preferred aspect of the battery disclosed herein, in an electrode body, a first tab and a third tab are arranged such that the middle of the base width of the first tab and the middle of the base width of the third tab are displaced from each other in the perpendicular direction, and a second tab and a fourth tab are arranged such that the middle of the base width of the second tab and the middle of the base width of the fourth tab are displaced from each other in the perpendicular direction.
    Type: Application
    Filed: December 23, 2022
    Publication date: June 29, 2023
    Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Tomoyuki YAMADA, Takashi HOSOKAWA, Ryoichi WAKIMOTO
  • Publication number: 20230207859
    Abstract: Provided is a technique increasing the capacity of secondary batteries. According to the technique disclosed herein, there is provided a secondary battery having a flat wound electrode body in which a first electrode and a second electrode different from the first electrode are laminated and wound with a separator interposed therebetween, and a first current collecting member. The wound electrode body has a plurality of first electrode tabs. Ten or more first electrode tabs are provided and stacked. In a thickness direction of the wound electrode body, a ratio (N1A/N1B) of the number N1A of stacked layers of the first electrode tabs and the number N1B of stacked layers of the first electrode satisfies 0.3 to 0.7. The plurality of first electrode tabs are bent and connected to the first electrode current collecting member.
    Type: Application
    Filed: December 23, 2022
    Publication date: June 29, 2023
    Inventor: Ryoichi WAKIMOTO