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: 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
  • Patent number: 11133545
    Abstract: A prismatic secondary battery includes an electrode body having a positive electrode plate and a negative electrode plate, a prismatic outer casing accommodating the electrode body, a sealing plate sealing the opening of the prismatic outer casing, a negative electrode terminal attached to the sealing plate, and a negative electrode collector electrically connecting the negative electrode plate and the negative electrode terminal. An insulating member is disposed between the sealing plate and the negative electrode terminal. An insulating sheet is disposed between the sealing plate and the negative electrode collector. The insulating member and the insulating sheet are disposed so as to overlap with each other in a direction perpendicular to the sealing plate.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: September 28, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hiroshi Takabayashi
  • Publication number: 20210296746
    Abstract: A conductive member (61) is disposed near a side of the sealing plate (2) facing the inside of a battery with a first insulating member (10) disposed therebetween. The conductive member (61) has a conductive-member opening portion (61f) at a side facing the electrode assembly. An inserting portion (7b) of a positive electrode terminal (7) is inserted through a third terminal-receiving hole (61c) in the conductive member (61) and connected to the conductive member (61). The conductive-member opening portion (61f) of the conductive member (61) is sealed by a deformation plate (62), and the deformation plate (62) is connected to a first positive-electrode current collector (6a), which is electrically connected to positive electrode plates. The conductive member (61) includes a pressing projection (61e) that projects toward the first insulating member (10) from a portion thereof that faces the first insulating member (10).
    Type: Application
    Filed: June 8, 2021
    Publication date: September 23, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hiroyuki Yamada
  • Publication number: 20210280952
    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: July 26, 2017
    Publication date: September 9, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Atsushi Tsuji
  • Publication number: 20210249742
    Abstract: A negative-electrode terminal that is secured to a sealing plate is connected to a first negative-electrode current collector. A negative-electrode tab that is connected to the negative-electrode sheet is connected to a second negative-electrode current collector. The first negative-electrode current collector and the second negative-electrode current collector are disposed along the sealing plate. The second negative-electrode current collector has an opening. The second negative-electrode current collector is disposed on the first negative-electrode current collector such that the opening faces the first negative-electrode current collector. The second negative-electrode current collector is welded to the first negative-electrode current collector around the opening.
    Type: Application
    Filed: April 29, 2021
    Publication date: August 12, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventor: Ryoichi Wakimoto
  • Publication number: 20210242484
    Abstract: 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: Application
    Filed: April 21, 2021
    Publication date: August 5, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Yohei Muroya, Hiroyuki Yamada
  • Patent number: 11063328
    Abstract: A conductive member (61) is disposed near a side of the sealing plate (2) facing the inside of a battery with a first insulating member (10) disposed therebetween. The conductive member (61) has a conductive-member opening portion (61f) at a side facing the electrode assembly. An inserting portion (7b) of a positive electrode terminal (7) is inserted through a third terminal-receiving hole (61c) in the conductive member (61) and connected to the conductive member (61). The conductive-member opening portion (61f) of the conductive member (61) is sealed by a deformation plate (62), and the deformation plate (62) is connected to a first positive-electrode current collector (6a), which is electrically connected to positive electrode plates. The conductive member (61) includes a pressing projection (61e) that projects toward the first insulating member (10) from a portion thereof that faces the first insulating member (10).
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: July 13, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hiroyuki Yamada
  • Patent number: 11050092
    Abstract: A first electrode body element and a second electrode body element including a positive electrode plate and a negative electrode plate are fabricated, 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 lead portion of a positive electrode collector attached to a sealing plate, 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 lead portion of a negative electrode collector attached to the sealing plate, and the first electrode body element and the second electrode body element are arranged together as one such that an electrode body is formed.
    Type: Grant
    Filed: May 6, 2019
    Date of Patent: June 29, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hirofumi Furukawa, Kazuhiro Kitaoka, Yasuhiro Yamauchi
  • Patent number: 11050102
    Abstract: A power storage device includes an electrode body, an insulating holder, and an outer case. The insulating holder is formed by folding a sheet formed of an insulating material. The insulating holder has an interposed wall interposed between a side end surface of the electrode body and the outer case. The interposed wall has a first facing region that faces a curved surface of a corner portion of the outer case and a second facing region that faces a portion away from the curved surface toward an opening. Each of the first facing region and the second facing region has a plurality of overlap sections in which some of sheet elements that form the sheet overlap each other. The number of the overlapping sheets is larger in the overlap section arranged in the second facing region than in the overlap section arranged in the first facing region.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: June 29, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventor: Ryoichi Wakimoto
  • Patent number: 11024925
    Abstract: A negative-electrode terminal that is secured to a sealing plate is connected to a first negative-electrode current collector. A negative-electrode tab that is connected to the negative-electrode sheet is connected to a second negative-electrode current collector. The first negative-electrode current collector and the second negative-electrode current collector are disposed along the sealing plate. The second negative-electrode current collector has an opening. The second negative-electrode current collector is disposed on the first negative-electrode current collector such that the opening faces the first negative-electrode current collector. The second negative-electrode current collector is welded to the first negative-electrode current collector around the opening.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: June 1, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventor: Ryoichi Wakimoto
  • Patent number: 11018367
    Abstract: 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: Grant
    Filed: January 23, 2019
    Date of Patent: May 25, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Yohei Muroya, Hiroyuki Yamada
  • Publication number: 20210104796
    Abstract: A rectangular secondary battery including a sealing plate. The scaling plate has a first fitting recess that is nearer than a positive electrode terminal attachment hole to a center of the sealing plate and a second fitting recess that is nearer than the positive electrode terminal attachment hole to an end portion of the sealing plate. The first fitting recess and the second fitting recess are disposed at positions that are displaced from the center of the sealing plate in a transversal direction of the sealing plate. A first fitting protrusion and a second fitting protrusion of a second outer insulator are respectively disposed in the first fitting recess and the second fitting recess.
    Type: Application
    Filed: March 20, 2018
    Publication date: April 8, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventor: Ryoichi Wakimoto
  • Patent number: 10938057
    Abstract: A method of manufacturing a secondary battery including an electrode body including a positive electrode plate and a negative electrode plate, an outer package including an opening and housing the electrode body, a sealing plate sealing the opening, a negative electrode terminal attached to the sealing plate, a negative electrode tab portion provided in the negative electrode plate, and a negative electrode collector electrically connecting the negative electrode tab portion and the negative electrode terminal to each other, the method including welding a flange portion of the negative electrode terminal and the negative electrode collector together by projecting an energy ray, the negative electrode collector includes, before the welding, a rough surface portion, and in the welding, the flange portion of the negative electrode terminal and the negative electrode collector are connected by welding by projecting an energy ray onto the rough surface portion.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: March 2, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Naoya Tada
  • Patent number: 10916760
    Abstract: A method of manufacturing a secondary battery including an electrode body having a positive electrode plate (40) having a positive electrode tab (4c), a negative electrode plate (5) having a negative electrode tab (5c), and a separator, in which the positive electrode tab (4c) is connected to a positive electrode collector in a curved state and the negative electrode tab (5c) is connected to a negative electrode collector in a curved state, and in which, as the positive electrode plate (4), one provided with a cutaway (4e) at a base of the positive electrode tab (4c) in a region where a positive electrode active material mixture layer (4a) is formed on a positive electrode core body is used.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: February 9, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Masao Fukunaga, Ryoichi Wakimoto
  • Patent number: 10910673
    Abstract: An electrode body, which includes a positive electrode plate and a negative electrode plate, includes a positive-electrode tab group that is composed of a plurality of positive electrode tabs. The positive-electrode tab group is disposed between a sealing plate and an electrode body, and a positive-electrode current collector includes a base portion and a tab connection portion that is folded from an end of the base portion. The base portion of the positive-electrode current collector is connected to a positive electrode terminal, and the tab connection portion of the positive-electrode current collector is connected to the positive-electrode tab group. A fuse portion is formed in the positive-electrode current collector, and a first-insulator second region of a first insulator, which is connected to an inner insulator, is disposed between the base portion and the tab connection portion.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: February 2, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hiroshi Takabayashi
  • Publication number: 20210013474
    Abstract: A secondary battery includes: an electrode assembly including a positive electrode plate and a negative electrode plate; an exterior housing that has an opening and houses the electrode assembly; and a sealing plate (2) that seals the opening. The exterior housing and the sealing plate (2) form a battery case. A deformable member (19) that deforms when the pressure inside the battery case reaches a prescribed value or higher and a gas release valve (18) that breaks when the pressure inside the battery case reaches a prescribed value or higher to release gas inside the battery case to the outside of the battery case are provided in the sealing plate (2). A metallic reinforcing member (30) is connected to the inner surface of the sealing plate (2).
    Type: Application
    Filed: September 14, 2020
    Publication date: January 14, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hiroyuki Yamada
  • Publication number: 20200411835
    Abstract: A secondary battery includes an electrode body including a positive electrode plate and a negative electrode plate; a battery case containing the electrode body; a terminal attached to the battery case; a conductive member having an opening adjacent to the electrode body; a deformation plate that seals the opening, and a current collector. The positive electrode plate and a positive electrode terminal are electrically connected to each other via a first positive electrode current collector, the deformation plate, and the conductive member. The first positive electrode current collector has a through-hole. The deformation plate is disposed to face the through-hole. A portion of the first positive electrode current collector distant from the through-hole is welded to the deformation plate to form a weld.
    Type: Application
    Filed: September 16, 2020
    Publication date: December 31, 2020
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Naoya Tada, Atsushi Tsuji, Yoshinori Yokoyama
  • Publication number: 20200403215
    Abstract: A secondary battery includes an electrode body including a positive electrode plate and a negative electrode plate; a battery case containing the electrode body; a positive electrode terminal attached to the battery case; a conductive member having an opening adjacent to the electrode body; a deformation plate that seals the opening, and a current collector. The positive electrode plate and the positive electrode terminal are electrically connected to each other via a first positive electrode current collector, the deformation plate, and the conductive member. The deformation plate has a thick portion, which has a larger thickness than the surrounding area, in a central part. The thick portion of the deformation plate is welded to the first positive electrode current collector to form a weld.
    Type: Application
    Filed: September 2, 2020
    Publication date: December 24, 2020
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Naoya Tada, Atsushi Tsuji, Yoshinori Yokoyama
  • Patent number: 10833372
    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.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: November 10, 2020
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hiroshi Takabayashi
  • Patent number: 10811650
    Abstract: A secondary battery includes: an electrode assembly including a positive electrode plate and a negative electrode plate; an exterior housing that has an opening and houses the electrode assembly; and a sealing plate (2) that seals the opening. The exterior housing and the sealing plate (2) form a battery case. A deformable member (19) that deforms when the pressure inside the battery case reaches a prescribed value or higher and a gas release valve (18) that breaks when the pressure inside the battery case reaches a prescribed value or higher to release gas inside the battery case to the outside of the battery case are provided in the sealing plate (2). A metallic reinforcing member (30) is connected to the inner surface of the sealing plate (2).
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: October 20, 2020
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hiroyuki Yamada