Patents by Inventor Hirokazu KAMBAYASHI

Hirokazu KAMBAYASHI 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: 11114729
    Abstract: An energy storage device including: an electrode assembly and a positive electrode current collector, wherein the positive electrode current collector includes an electrode connecting portion connected to the electrode assembly, the electrode connecting portion includes a first portion and a second portion which has a smaller wall thickness than the first portion and is joined to the electrode assembly, and either one of the second portion or the electrode assembly includes a first convex portion projecting toward the other in a joined portion.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: September 7, 2021
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Hirokazu Kambayashi, Kazuto Maeda
  • Publication number: 20210036298
    Abstract: An energy storage device includes: an electrode assembly; a case that houses the electrode assembly; and a spacer that is a side spacer disposed between the electrode assembly and the case. The spacer has a rear portion disposed to face the electrode-assembly end portion, a side portion extended in a direction along the side surface of the electrode assembly, and a connection that rotatably connects the side portion to the rear portion.
    Type: Application
    Filed: January 30, 2019
    Publication date: February 4, 2021
    Inventors: Hirokazu KAMBAYASHI, Shohel YAMAO, Takuya AOYAMA
  • Patent number: 10833299
    Abstract: A sealing member (positive electrode first sealing member) disposed between a terminal (positive electrode terminal), which is provided on a case of an energy storage device, and the case or between a current collector (positive electrode current collector), which is electrically connected with the terminal, and the case. The sealing member includes a first surface (bottom surface) which faces the case and a second surface (bottom surface) which is opposite to the first surface and faces the terminal or the current collector. A first protrusion is formed on the first surface, the first protrusion surrounding a shaft portion of the terminal. A second protrusion is formed on the second surface, the second protrusion surrounding the shaft portion of the terminal. A protrusion amount of the first protrusion is different from a protrusion amount of the second protrusion.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: November 10, 2020
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Hirokazu Kambayashi, Kazuto Maeda
  • Publication number: 20200335738
    Abstract: An energy storage device includes: a case including a case body and a lid; and electrode terminals (positive electrode terminal, negative electrode terminal) fixed to the lid. A junction portion for joining the case body and the lid to each other is formed on a surface of the case on an electrode terminal side. The lid includes recessed portions disposed along and adjacent to the junction portion without being disposed between the electrode terminal and the junction portion.
    Type: Application
    Filed: November 29, 2018
    Publication date: October 22, 2020
    Inventors: Kazuto MAEDA, Hirokazu KAMBAYASHI
  • Patent number: 10797292
    Abstract: An energy storage device includes: an electrode assembly formed by stacking plates; and a first conductive member welded to one of both surfaces of a converged portion on an end portion of the electrode assembly without covering the converged portion from an end portion side, wherein a welding surface of a welded portion where the electrode assembly and the first conductive member are welded to each other is disposed at a position recessed from an outer surface of the first conductive member.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: October 6, 2020
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Hirokazu Kambayashi, Kazuto Maeda
  • Patent number: 10644293
    Abstract: An energy storage device comprising: electrode terminals; an electrode assembly formed by stacking a positive electrode plate and a negative electrode plate; and current collectors which connect the electrode terminals and the electrode assembly to each other, wherein at least one of the positive electrode plate and the negative electrode plate has a plurality of tab groups which are joined to the current collector, each tab group being formed by stacking one or more tabs projecting toward the electrode terminal, and at least one tab group among the tab groups and the current collector has a swaged joint portion, the swaged joint portion projecting from either one of the tab group or the current collector to the other of the tab group or the current collector.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: May 5, 2020
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Kazuto Maeda, Hirokazu Kambayashi
  • Patent number: 10637010
    Abstract: In a method for manufacturing an energy storage device by applying welding to a container of the energy storage device, the method includes: arranging a jig on which wall surfaces are formed between two parts to be welded to which welding is applied; and welding the two parts to be welded while supplying a shield gas to the two parts to be welded from two different directions corresponding to the two parts to be welded.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: April 28, 2020
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Hirokazu Kambayashi, Kazuto Maeda
  • Patent number: 10601019
    Abstract: An energy storage device including: an electrode assembly having a body portion and a first tab portion projecting from the body portion; and a container housing the electrode assembly, wherein a first current collector electrically connected to the first tab portion or the first tab portion, and the container have a swaged joint portion having a concavo-convex structure projecting toward the other side from one side.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: March 24, 2020
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Kazuto Maeda, Hirokazu Kambayashi, Shohei Yamao
  • Patent number: 10593926
    Abstract: An energy storage device includes a positive electrode current collector and a negative electrode current collector which respectively have electric conductivity and are joined to each other, and cover members. The energy storage device includes swaged joint portions which join the positive electrode current collector and the cover members to each other, and are engaged with each other by fitting engagement by a concavo-convex fitting engagement structure which projects from the positive electrode current collector toward the cover members, and swaged joint portions which join the negative electrode current collector and the cover members to each other and, are engaged with each other by fitting engagement by a concavo-convex fitting engagement structure which projects from the negative electrode current collector toward the cover members. The cover members respectively include a strip-shaped projection which forms a rigidity changing part on the side of the swaged joint portion.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: March 17, 2020
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Kazuto Maeda, Hirokazu Kambayashi, Shohei Yamao
  • Patent number: 10381612
    Abstract: An energy storage device includes a first locking portion for locking a rotation of a positive electrode current collecting member about a shaft portion of a positive electrode terminal with respect to a lower insulating member. The first locking portion includes: a recessed portion formed on the lower insulating member; and a projecting portion formed on the positive electrode current collecting member. The recessed portion is indented away from the shaft portion in a direction which intersects with the shaft portion. The projecting portion projects away from the shaft portion in the direction which intersects with the shaft portion. The recessed portion and the projecting portion are configured to engage with each other. A leg portion is positioned closer to an end portion of a lid body in a longitudinal direction of the lid body than the first locking portion is.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: August 13, 2019
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Kazuto Maeda, Hirokazu Kambayashi
  • Publication number: 20190044105
    Abstract: A method for manufacturing an energy storage device includes a swaging step in which a swaged portion is formed by swaging a tip portion, penetrating a positive electrode terminal or a positive electrode current collector and projecting in a predetermined direction from the positive electrode terminal or the positive electrode current collector, of a shaft portion. In the swaging step, the tip portion of the shaft portion is swaged by a punch which includes a pressing surface, the pressing surface including a punch-side first concave portion which is concaved in the predetermined direction and a punch-side second concave portion which is concaved in the predetermined direction more than the punch-side first concave portion at an inner peripheral side of the punch-side first concave portion.
    Type: Application
    Filed: January 19, 2017
    Publication date: February 7, 2019
    Inventors: Kazuto MAEDA, Hirokazu KAMBAYASHI
  • Patent number: 10170767
    Abstract: Provided is an energy storage device which includes: an electrode assembly including a positive electrode and a negative electrode respectively including a non-coated region having a metal foil; current collectors each having a support portion which is made to overlap with the non-coated region; and opposedly facing supports each configured to clamp the non-coated region cooperatively with the support portion, wherein at least one of the non-coated region, the support portion and the opposedly facing support includes a conductive layer having non-oxidizing property or hardly-oxidizable property, the conductive layer covering at least one surface out of a surface of the non-coated region facing the support portion, a surface of the non-coated region facing the opposedly facing support, a surface of the support portion facing the non-coated region, and a surface of the opposedly facing support facing the non-coated region.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: January 1, 2019
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Takeshi Sasaki, Hirokazu Kambayashi, Kazuto Maeda
  • Publication number: 20180375069
    Abstract: A sealing member (positive electrode first sealing member) disposed between a terminal (positive electrode terminal), which is provided on a case of an energy storage device, and the case or between a current collector (positive electrode current collector), which is electrically connected with the terminal, and the case. The sealing member includes a first surface (bottom surface) which faces the case and a second surface (bottom surface) which is opposite to the first surface and faces the terminal or the current collector. A first protrusion is formed on the first surface, the first protrusion surrounding a shaft portion of the terminal. A second protrusion is formed on the second surface, the second protrusion surrounding the shaft portion of the terminal. A protrusion amount of the first protrusion is different from a protrusion amount of the second protrusion.
    Type: Application
    Filed: December 28, 2016
    Publication date: December 27, 2018
    Inventors: Hirokazu KAMBAYASHI, Kazuto MAEDA
  • Publication number: 20180342723
    Abstract: An energy storage device including: an electrode assembly and a positive electrode current collector, wherein the positive electrode current collector includes an electrode connecting portion connected to the electrode assembly, the electrode connecting portion includes a first portion and a second portion which has a smaller wall thickness than the first portion and is joined to the electrode assembly, and either one of the second portion or the electrode assembly includes a first convex portion projecting toward the other in a joined portion.
    Type: Application
    Filed: September 27, 2016
    Publication date: November 29, 2018
    Inventors: Hirokazu KAMBAYASHI, Kazuto MAEDA
  • Publication number: 20180287124
    Abstract: An energy storage device includes: an electrode assembly formed by stacking plates; and a first conductive member welded to one of both surfaces of a converged portion on an end portion of the electrode assembly without covering the converged portion from an end portion side, wherein a welding surface of a welded portion where the electrode assembly and the first conductive member are welded to each other is disposed at a position recessed from an outer surface of the first conductive member.
    Type: Application
    Filed: September 27, 2016
    Publication date: October 4, 2018
    Inventors: Hirokazu KAMBAYASHI, Kazuto MAEDA
  • Publication number: 20180269457
    Abstract: An energy storage device includes a current collector (negative electrode current collector), an insulating member (lower insulating member) that abuts on the current collector, an electrode assembly, and a leading plate (negative electrode leading plate) that connects the electrode assembly and the current collector. The leading plate includes an engaging unit (notch) that engages the insulating member or the current collector, and the insulating member or the current collector includes an engaged unit (projection) that the engaging unit of the leading plate engages.
    Type: Application
    Filed: September 16, 2016
    Publication date: September 20, 2018
    Applicants: GS Yuasa Internaitonal Ltd., Lithium Energy and Power GmbH & Co. KG
    Inventors: Kenji KAWATE, Yusuke OGAWA, Hirokazu KAMBAYASHI
  • Patent number: 10074831
    Abstract: An electric storage element includes an electrode body including a positive electrode and a negative electrode, the electrode body including a coated region, which includes active materials applied to surfaces of the positive electrode and the negative electrode, and a non-coated region not including the active material on the surface of the positive electrode or the negative electrode, a case including a case body for housing the electrode body and a lid plate that covers an opening of the case body, the case body including a bottom wall having a long side and a short side, the case body further including a side wall standing on the short side of the bottom wall, the lid plate being formed with an electrode terminal, and an insulating member arranged in the case to insulate the electrode body from the case.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: September 11, 2018
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Shogo Tsuruta, Syun Ito, Hirokazu Kambayashi
  • Publication number: 20180183018
    Abstract: An energy storage device includes: an electrode assembly; a container that includes a wall portion and accommodates the electrode assembly; a first conductive member; a second conductive member electrically connected to the electrode assembly and connected to the first conductive member and is arranged to pass through the wall portion; and a sealing member that is nonmetallic and disposed between the first conductive member and the second conductive member. The first conductive member and the second conductive member are in direct contact and are made of mutually different metal materials. The sealing member is disposed at a contact interface of the first conductive member and the second conductive member.
    Type: Application
    Filed: December 22, 2017
    Publication date: June 28, 2018
    Inventors: Kazuto MAEDA, Hirokazu KAMBAYASHI
  • Publication number: 20180097208
    Abstract: An energy storage device includes a first locking portion for locking a rotation of a positive electrode current collecting member about a shaft portion of a positive electrode terminal with respect to a lower insulating member. The first locking portion includes: a recessed portion formed on the lower insulating member; and a projecting portion formed on the positive electrode current collecting member. The recessed portion is indented away from the shaft portion in a direction which intersects with the shaft portion. The projecting portion projects away from the shaft portion in the direction which intersects with the shaft portion. The recessed portion and the projecting portion are configured to engage with each other. A leg portion is positioned closer to an end portion of a lid body in a longitudinal direction of the lid body than the first locking portion is.
    Type: Application
    Filed: September 11, 2017
    Publication date: April 5, 2018
    Inventors: Kazuto MAEDA, Hirokazu KAMBAYASHI
  • Publication number: 20180069227
    Abstract: An energy storage device including: an electrode assembly having a body portion and a first tab portion projecting from the body portion; and a container housing the electrode assembly, wherein a first current collector electrically connected to the first tab portion or the first tab portion, and the container have a swaged joint portion having a concavo-convex structure projecting toward the other side from one side.
    Type: Application
    Filed: September 6, 2017
    Publication date: March 8, 2018
    Inventors: Kazuto MAEDA, Hirokazu KAMBAYASHI, Shohei YAMAO