Patents by Inventor Katsunori Yokoshima

Katsunori Yokoshima 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: 11393643
    Abstract: An electrochemical device includes: an electricity storage device that includes a positive electrode, a negative electrode, a separator, and a plurality of lead plates electrically connected to the positive electrode or the negative electrode, the positive electrode and the negative electrode being stacked via the separator and wound; a connection plate having a first surface on a side of the electricity storage device and a second surface opposite to the first surface, the plurality of lead plates being stacked and welded to the first surface; a rupture disc connected to the second surface of the connection plate; and an insulator that abuts on a first area that is an outer peripheral area of the second surface and insulates the connection plate and the rupture disc from each other, the plurality of lead plates being welded to a second area opposite to the first area of the first surface.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: July 19, 2022
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Katsunori Yokoshima, Hiroto Mori
  • Patent number: 11315743
    Abstract: An electrochemical device includes: an electricity storage device that includes positive and negative electrodes stacked via a separator and wound, and lead plates electrically connected to the positive or negative electrode; a connection plate having a first surface on an electricity storage device side and a second surface opposite to the first surface, the lead plates being stacked and welded to the first surface; and a rupture disc connected to the second surface, the lead plates being welded to the connection plate at first and second welding portions on the first surface separated from each other, a lead plate on a connection plate side being welded to the connection plate at the first and second welding portions, a lead plate on a side opposite to the connection plate being welded to the connection plate at the first welding portion and unwelded to the connection plate at the second welding portion.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: April 26, 2022
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Katsunori Yokoshima, Hiroto Mori
  • Patent number: 11195668
    Abstract: An electrochemical device includes a first electrode unit; a second electrode unit; a third electrode unit; a first lithium ion supply source, which is disposed between the first electrode unit and the third electrode unit and includes a first current collector that is a porous metal foil having a first main surface on the side of the first electrode unit; a second lithium ion supply source, which is disposed between the second electrode unit and the third electrode unit and includes a second current collector that is a porous metal foil having a third main surface on the side of the second electrode unit; and an electrolyte. Lithium ions are pre-doped from first metal lithium attached to the first main surface, and second metal lithium attached to the third main surface, into the negative electrode of each electrode unit.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: December 7, 2021
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Katsunori Yokoshima, Koji Kano
  • Patent number: 10896785
    Abstract: In an electric storage element, a negative electrode has a negative-electrode collector and a negative-electrode active material layer provided on a principal face of the negative-electrode collector, the positive electrode having a positive-electrode collector and a positive-electrode active material layer provided on a principal face of the positive-electrode collector, and the separator insulating the negative electrode and the positive electrode, are stacked and wound together. A negative-electrode terminal and a positive-electrode terminal are electrically connected to the negative-electrode collector and the positive-electrode collector, respectively, and projects from a winding structure along a direction of a center axis of winding. A first protective tape covers the negative-electrode terminal and has lower ion permeability than that of the separator.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: January 19, 2021
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Koji Kano, Katsunori Yokoshima
  • Patent number: 10658124
    Abstract: In an embodiment, an electrochemical device includes a winding structure which has a negative electrode, a positive electrode, and separators stacked and wound together; a negative-electrode terminal; a positive-electrode terminal; a first protective tape which covers the negative-electrode terminal and a negative-electrode active material layer; a second protective tape which covers the positive-electrode terminal and a positive-electrode active material layer; and electrolyte, wherein the positive-electrode terminal is separated from the negative-electrode terminal by a first distance. The width corresponding to the sum of a first width of the first protective tape along a winding direction of the winding structure, and a second width of the second protective tape along the winding direction, is smaller than a value obtained by multiplying the first distance by pi.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: May 19, 2020
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Hiroki Takahashi, Koji Kano, Takatoshi Nagase, Katsunori Yokoshima, Shinji Ishii
  • Patent number: 10658125
    Abstract: An electrochemical device is constituted by a positive electrode, a negative electrode, and separators that are wound in such a way that the first principal face of the negative electrode and third principal face of the positive electrode are on the inner side of winding, while the second principal face of the negative electrode and fourth principal face of the positive electrode are on the outer side of winding, with the separators separating the positive electrode and negative electrode; wherein the second principal face has a first region opposed to the positive electrode via the separator and a second region on the outermost side of winding and not opposed to the positive electrode, the second region includes a first uncoated region where no negative electrode active material layer is formed, and a metal lithium is joined to the first uncoated region and immersed in electrolytic solution.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: May 19, 2020
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Koji Kano, Shinji Ishii, Katsunori Yokoshima, Hiroki Takahashi, Takatoshi Nagase
  • Publication number: 20200106077
    Abstract: An electrochemical device includes: an electricity storage device that includes positive and negative electrodes stacked via a separator and wound, and lead plates electrically connected to the positive or negative electrode; a connection plate having a first surface on an electricity storage device side and a second surface opposite to the first surface, the lead plates being stacked and welded to the first surface; and a rupture disc connected to the second surface, the lead plates being welded to the connection plate at first and second welding portions on the first surface separated from each other, a lead plate on a connection plate side being welded to the connection plate at the first and second welding portions, a lead plate on a side opposite to the connection plate being welded to the connection plate at the first welding portion and unwelded to the connection plate at the second welding portion.
    Type: Application
    Filed: September 24, 2019
    Publication date: April 2, 2020
    Inventors: Katsunori YOKOSHIMA, Hiroto MORI
  • Publication number: 20200106126
    Abstract: An electrochemical device includes: an electricity storage device that includes a positive electrode, a negative electrode, a separator, and a plurality of lead plates electrically connected to the positive electrode or the negative electrode, the positive electrode and the negative electrode being stacked via the separator and wound; a connection plate having a first surface on a side of the electricity storage device and a second surface opposite to the first surface, the plurality of lead plates being stacked and welded to the first surface; a rupture disc connected to the second surface of the connection plate; and an insulator that abuts on a first area that is an outer peripheral area of the second surface and insulates the connection plate and the rupture disc from each other, the plurality of lead plates being welded to a second area opposite to the first area of the first surface.
    Type: Application
    Filed: September 24, 2019
    Publication date: April 2, 2020
    Inventors: Katsunori YOKOSHIMA, Hiroto MORI
  • Publication number: 20200090879
    Abstract: An electrochemical device includes: an exterior can formed of metal containing a first metal type; an electricity storage device that includes a positive electrode, a negative electrode, and a separator, the positive electrode and the negative electrode being stacked via the separator and wound, the electricity storage device further including a lead plate that is electrically connected to one of the positive electrode and the negative electrode, contains a second metal type different from the first metal type, and is formed of metal different from that of the exterior can, the electricity storage device being housed in the exterior can; and a reinforcement plate formed of metal containing the first metal type, the exterior can and the reinforcement plate being welded with the lead plate being sandwiched therebetween, the first metal type and the second metal type coexisting at a welding portion thereof.
    Type: Application
    Filed: September 16, 2019
    Publication date: March 19, 2020
    Inventors: Hiroto MORI, Katsunori YOKOSHIMA, Koji KANO
  • Publication number: 20200066459
    Abstract: An electrochemical device includes a first electrode unit; a second electrode unit; a third electrode unit; a first lithium ion supply source, which is disposed between the first electrode unit and the third electrode unit and includes a first current collector that is a porous metal foil having a first main surface on the side of the first electrode unit; a second lithium ion supply source, which is disposed between the second electrode unit and the third electrode unit and includes a second current collector that is a porous metal foil having a third main surface on the side of the second electrode unit; and an electrolyte. Lithium ions are pre-doped from first metal lithium attached to the first main surface, and second metal lithium attached to the third main surface, into the negative electrode of each electrode unit.
    Type: Application
    Filed: February 21, 2018
    Publication date: February 27, 2020
    Inventors: Katsunori YOKOSHIMA, Koji KANO
  • Patent number: 10553369
    Abstract: An electric storage cell has an electric storage element and a covering film package. The covering film package houses the electric storage element and includes: a metal layer having a first principle face on the electric storage element side and a second principle face on the opposite side of the first principle face, an internal resin layer laminated to the first principle face, and an external resin layer laminated to the second principle face, with a slit formed in the external resin layer; wherein the contact area further includes a non-seal area between the seal area and the electric storage element as viewed from above, wherein the seal area has a projecting area that penetrates into the non-seal area, and the slit is provided between the projecting area and the electric storage element as viewed from above.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: February 4, 2020
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Takahiro Nagashima, Katsunori Yokoshima, Takayuki Tsuchiya, Hiromi Sato, Shinji Ishii
  • Patent number: 10410799
    Abstract: An electrochemical device includes a positive electrode, a negative electrode, and separators which are stacked and wound together, and electrolytic solution. A negative-electrode terminal is provided which is made of metal, and has a joining part which is a part joined to the principal face of the negative-electrode collector. The negative electrode has a first width, the positive electrode has a second width, which is smaller than the first width, and the separators have a third width, which is greater than the first width, along the direction parallel with the center axis of winding. The length of the joining part along the direction parallel with the center axis of winding is equal to or greater than the second width, but equal to or smaller than the third width.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: September 10, 2019
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Takatoshi Nagase, Shinji Ishii, Koji Kano, Katsunori Yokoshima
  • Patent number: 10381171
    Abstract: An electric storage cell has an electric storage element and a covering body. The covering body houses the electric storage element and has a metal layer with a first principal face on the electric storage element side and a second principal face on the opposite side, an internal resin layer made of resin laminated onto the first principal face, and an external resin layer made of resin laminated onto the second principal face, with a groove part formed on the second principal face side of the metal layer. The above structures provides a highly reliable electric storage cell, covering film, and electric storage module capable of releasing the rising internal pressure safely in the event of abnormality.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: August 13, 2019
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Hiromi Sato, Tomofumi Akiba, Shinji Ishii, Katsunori Yokoshima
  • Patent number: 10354809
    Abstract: An electrochemical device is constituted by a positive electrode, a negative electrode, and separators that are wound in such a way that the first principal face of the negative electrode and third principal face of the positive electrode are on the inner side of winding, while the second principal face of the negative electrode and fourth principal face of the positive electrode are on the outer side of winding, with the separators separating the positive electrode and negative electrode; wherein the second principal face has a first region opposed to the positive electrode via the separator and a second region on the outermost side of winding and not opposed to the positive electrode, the second region includes a first uncoated region where no negative electrode active material layer is formed, and a metal lithium is joined to the first uncoated region and immersed in electrolytic solution.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: July 16, 2019
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Koji Kano, Shinji Ishii, Katsunori Yokoshima, Hiroki Takahashi, Takatoshi Nagase
  • Publication number: 20190066934
    Abstract: An electrochemical device is constituted by a positive electrode, a negative electrode, and separators that are wound in such a way that the first principal face of the negative electrode and third principal face of the positive electrode are on the inner side of winding, while the second principal face of the negative electrode and fourth principal face of the positive electrode are on the outer side of winding, with the separators separating the positive electrode and negative electrode; wherein the second principal face has a first region opposed to the positive electrode via the separator and a second region on the outermost side of winding and not opposed to the positive electrode, the second region includes a first uncoated region where no negative electrode active material layer is formed, and a metal lithium is joined to the first uncoated region and immersed in electrolytic solution.
    Type: Application
    Filed: October 31, 2018
    Publication date: February 28, 2019
    Inventors: Koji KANO, Shinji ISHII, Katsunori YOKOSHIMA, Hiroki TAKAHASHI, Takatoshi NAGASE
  • Publication number: 20180248168
    Abstract: An electrochemical device includes multiple electrode bodies and electrolyte. Each electrode body includes: an electrode unit constituted by positive electrodes and negative electrodes that are stacked together alternately with separators in between; a first lithium ion pre-doping supply source which includes a first current collector being a metal foil having no through holes; and a second lithium ion pre-doping supply source which sandwiches the electrode unit together with the first lithium ion supply source, and which includes a second current collector being a metal foil having no though holes. The multiple electrode bodies are stacked in a manner attaching the first current collector of one electrode body to the second current collector of another electrode body. The negative electrodes provided in each electrode unit are pre-doped with lithium ions derived from the first lithium ion pre-doping supply source and the second lithium ion pre-doping supply source.
    Type: Application
    Filed: February 22, 2018
    Publication date: August 30, 2018
    Inventors: Katsunori YOKOSHIMA, Koji KANO
  • Publication number: 20180233301
    Abstract: In an electric storage element, a negative electrode has a negative-electrode collector and a negative-electrode active material layer provided on a principal face of the negative-electrode collector, the positive electrode having a positive-electrode collector and a positive-electrode active material layer provided on a principal face of the positive-electrode collector, and the separator insulating the negative electrode and the positive electrode, are stacked and wound together. A negative-electrode terminal and a positive-electrode terminal are electrically connected to the negative-electrode collector and the positive-electrode collector, respectively, and projects from a winding structure along a direction of a center axis of winding. A first protective tape covers the negative-electrode terminal and has lower ion permeability than that of the separator.
    Type: Application
    Filed: February 6, 2018
    Publication date: August 16, 2018
    Inventors: Koji KANO, Katsunori YOKOSHIMA
  • Publication number: 20180108494
    Abstract: In an embodiment, an electrochemical device includes a winding structure which has a negative electrode, a positive electrode, and separators stacked and wound together; a negative-electrode terminal; a positive-electrode terminal; a first protective tape which covers the negative-electrode terminal and a negative-electrode active material layer; a second protective tape which covers the positive-electrode terminal and a positive-electrode active material layer; and electrolyte, wherein the positive-electrode terminal is separated from the negative-electrode terminal by a first distance. The width corresponding to the sum of a first width of the first protective tape along a winding direction of the winding structure, and a second width of the second protective tape along the winding direction, is smaller than a value obtained by multiplying the first distance by pi.
    Type: Application
    Filed: October 13, 2017
    Publication date: April 19, 2018
    Inventors: Hiroki TAKAHASHI, Koji KANO, Takatoshi NAGASE, Katsunori YOKOSHIMA, Shinji ISHII
  • Publication number: 20180062135
    Abstract: An electric storage cell has an electric storage element and a covering film package. The covering film package houses the electric storage element and includes: a metal layer having a first principle face on the electric storage element side and a second principle face on the opposite side of the first principle face, an internal resin layer laminated to the first principle face, and an external resin layer laminated to the second principle face, with a slit formed in the external resin layer; wherein the contact area further includes a non-seal area between the seal area and the electric storage element as viewed from above, wherein the seal area has a projecting area that penetrates into the non-seal area, and the slit is provided between the projecting area and the electric storage element as viewed from above.
    Type: Application
    Filed: March 30, 2017
    Publication date: March 1, 2018
    Inventors: Takahiro NAGASHIMA, Katsunori YOKOSHIMA, Takayuki TSUCHIYA, Hiromi SATO, Shinji ISHII
  • Publication number: 20180047960
    Abstract: An electric storage cell has an electric storage element and a covering film package. The covering film package houses the electric storage element and includes: a metal layer having a first principle face on the electric storage element side and a second principle face on the opposite side of the first principle face, an internal resin layer made of synthetic resin and laminated to the first principle face, and an external resin layer made of synthetic resin and laminated to the second principle face, with a slit formed in the external resin layer; wherein the contact area further includes a non-seal area between the seal area and the electric storage element as viewed from above, wherein the seal area has a projecting area that penetrates into the non-seal area, and the slit intersects with the boundary between the projecting area and the non-seal area.
    Type: Application
    Filed: March 30, 2017
    Publication date: February 15, 2018
    Inventors: Katsunori YOKOSHIMA, Takayuki TSUCHIYA, Hiromi SATO, Shinji ISHII