Patents by Inventor Kazutoshi Kohira

Kazutoshi Kohira 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: 11316223
    Abstract: A cylindrical battery with an opening sealing body that seals an opening of a battery can. The opening sealing body includes a valve member, a metal plate disposed on an inner side of the battery with respect to the valve member, and an annular insulating member interposed between the valve member and the metal plate. The valve member and the metal plate are connected to each other at respective central portions. The valve member has an annular thin-walled portion which is deformable when an internal pressure of the battery increases, and a recessed portion is formed by the thin-walled portion on the insulating member opposing side of the valve member. The insulating member has a section P1 that covers a surface, on the valve member side, of the metal plate, and the section P1 has a rib to be housed in the recessed portion.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: April 26, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takeshi Enomoto, Kazutoshi Kohira
  • Publication number: 20220123395
    Abstract: A battery including: a battery can including a cylinder portion including an opening edge portion at one end portion of the cylinder portion and a bottom portion that closes the other end portion of the cylinder portion; an electrode body; a sealing member that seals an opening of the opening edge portion. The sealing member includes: a sealing plate; a cap connected to the sealing plate and electrically insulated from the sealing plate; and a sealing portion sealing a space between the cylinder portion and the cap. The cap includes: a ring-shaped top plate portion opposing the opening edge portion in an axial direction of the cylinder portion; and a side wall portion covering an outer circumferential surface of the cylinder portion. The sealing portion may be a gasket provided between the cap and the cylinder portion in a compressed state. The cap is electrically connected to the cylinder portion.
    Type: Application
    Filed: November 29, 2019
    Publication date: April 21, 2022
    Inventors: Kazutoshi KOHIRA, Keisuke NAITO, Shinya GESHI, Hiroshi TAKASAKI, Kazumichi SHIMIZU
  • Publication number: 20220102805
    Abstract: A nonaqueous electrolyte secondary battery representing an embodiment of a sealed battery of the present invention includes a bottomed cylindrical exterior case, a sealing member, a cylindrical wound electrode assembly and an electrolyte. An open end of the exterior case is crimped together with the sealing member via an insulating gasket so as to form a seal. The sealing member includes a lid having a thin and fragile portion, an insulating ring, and a terminal plate having a thin and fragile portion. The terminal plate is electrically connected to a positive electrode current collector leading out from the cylindrical wound electrode assembly. The lid and the terminal plate are electrically connected within an opening of the insulating ring. The lid is disposed so as to expose an outer side of at least a portion of the lid opposed to the opening of the insulating ring directly to an outside environment.
    Type: Application
    Filed: December 9, 2021
    Publication date: March 31, 2022
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Kyosuke Miyata, Kazutoshi Kohira
  • Publication number: 20220085442
    Abstract: A battery includes a battery can which includes a cylindrical portion having an opening edge portion at one end portion and a bottom portion closing the other end portion of the cylindrical portion, an electrode assembly which is housed in the cylindrical portion, and an opening sealing body which seals an opening formed in the opening edge portion. The opening sealing body includes a terminal portion and a gasket interposed in a compressed state between the terminal portion and the opening edge portion. The opening edge portion includes at least a base portion extending in an axial direction of the cylindrical portion and a tongue portion protruding from the base portion, and the tongue portion extends inward in a radial direction of the cylindrical portion so as to cover an upper surface of the gasket.
    Type: Application
    Filed: December 19, 2019
    Publication date: March 17, 2022
    Inventors: TATSUYA HIRANO, KAZUTOSHI KOHIRA
  • Publication number: 20220077527
    Abstract: A battery includes a battery can including a cylindrical portion and a bottom portion, the cylindrical portion including an opening edge portion at one end portion of the cylindrical portion, the bottom portion closing the other end portion of the cylindrical portion; an electrode body housed in the cylindrical portion; a sealing member sealing an opening of the opening edge portion; and a fixing member fixing the sealing member to the battery can. The sealing member includes a terminal portion, an outer ring, and a first gasket, the outer ring being disposed along a peripheral edge of the terminal portion, and the first gasket being interposed between the opening edge portion and an external peripheral edge portion of the outer ring. The fixing member compresses the first gasket in a direction in which the external peripheral edge portion and the opening edge portion face each other, the fixing member compressing the first gasket via the external peripheral edge portion and the opening edge portion.
    Type: Application
    Filed: December 19, 2019
    Publication date: March 10, 2022
    Inventors: KAZUTOSHI KOHIRA, TATSUYA HIRANO
  • Publication number: 20220037723
    Abstract: A battery includes a battery can including a cylinder having a cylindrical shape and having an opening edge at one end, an electrode body, and a sealing member sealing an opening surrounded by the opening edge, in which the sealing member has a sealing plate electrically connected to a first electrode of the electrode body, a cap having a through hole corresponding to the sealing plate electrically insulated from the sealing plate, and a gasket that seals between the cylinder and the cap, the cap has a top plate having a ring shape and facing the cylinder, a side wall that is erected in an axial direction from a peripheral edge of the top plate and extends so as to overlap an outer surface of the cylinder, and a rib that is erected in the axial direction from the top plate inside of the side wall and extends so as to overlap an inner surface of the cylinder, the gasket is compressed in a radial direction of the cylinder between the rib and the cylinder, and the battery can and the cap are electrically connect
    Type: Application
    Filed: November 21, 2019
    Publication date: February 3, 2022
    Inventors: KAZUTOSHI KOHIRA, KAZUMICHI SHIMIZU
  • Patent number: 11233292
    Abstract: A nonaqueous electrolyte secondary battery representing an embodiment of a sealed battery of the present invention includes a bottomed cylindrical exterior case, a sealing member, a cylindrical wound electrode assembly and an electrolyte. An open end of the exterior case is crimped together with the sealing member via an insulating gasket so as to form a seal. The sealing member includes a lid having a thin and fragile portion, an insulating ring, and a terminal plate having a thin and fragile portion. The terminal plate is electrically connected to a positive electrode current collector leading out from the cylindrical wound electrode assembly. The lid and the terminal plate are electrically connected within an opening of the insulating ring. The lid is disposed so as to expose an outer side of at least a portion of the lid opposed to the opening of the insulating ring directly to an outside environment.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: January 25, 2022
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Kyosuke Miyata, Kazutoshi Kohira
  • Publication number: 20210119286
    Abstract: A cylindrical battery with an opening sealing body that seals an opening of a battery can. The opening sealing body includes a valve member, a metal plate disposed on an inner side of the battery with respect to the valve member, and an annular insulating member interposed between the valve member and the metal plate. The valve member and the metal plate are connected to each other at respective central portions. The valve member has an annular thin-walled portion which is deformable when an internal pressure of the battery increases, and a recessed portion is formed by the thin-walled portion on the insulating member opposing side of the valve member. The insulating member has a section P1 that covers a surface, on the valve member side, of the metal plate, and the section P1 has a rib to be housed in the recessed portion.
    Type: Application
    Filed: July 5, 2018
    Publication date: April 22, 2021
    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takeshi Enomoto, Kazutoshi Kohira
  • Publication number: 20210119291
    Abstract: A cylindrical battery with an opening sealing body which includes a valve member, a metal plate disposed on an inner side of the battery with respect to the valve member, and an annular insulating member interposed between the valve member and the metal plate. The valve member and the metal plate are connected at respective central portions. The metal plate and the insulating member each have communicating holes. The valve member has a thin-walled portion which is deformable when an internal pressure of the battery increases. The insulating member has a section that covers a surface, on the valve member side, of the metal plate, a section that is provided subsequent to the section and covers a circumferential end face of the metal plate, and a section that is provided subsequent to the section and covers a surface, on an inner side of the battery, of the metal plate.
    Type: Application
    Filed: July 5, 2018
    Publication date: April 22, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Kazutoshi Kohira, Takeshi Enomoto
  • Publication number: 20210119299
    Abstract: A cylindrical battery with an opening sealing body that seals an opening of a battery can. The opening sealing body includes a valve member, a metal plate disposed on an inner side of the battery with respect to the valve member, and an annular insulating member interposed between the valve member and the metal plate. The valve member and the metal plate are connected to each other at respective central portions. The valve member has an annular thin-walled portion which is deformable when an internal pressure of the battery increases. The metal plate and the insulating member have respective holes which communicate with each other. The insulating member has a section that covers a surface, on the valve member side, of the metal plate, and a section that is provided subsequent to the section and covers a lateral surface of the hole of the metal plate.
    Type: Application
    Filed: July 5, 2018
    Publication date: April 22, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takeshi Enomoto, Kazutoshi Kohira
  • Publication number: 20200280027
    Abstract: A battery including an upper insulating plate disposed between a sealing body and an electrode group. The upper insulating plate has a lead hole through which a positive electrode lead penetrates and an opening portion provided at a side opposite to the lead hole with respect to a central axis O of the battery orthogonal to the sealing body. The positive electrode lead has a first curved section adjacent to the lead hole and a second curved section provided at a side opposite to the first curved section with respect to the central axis O. When a distance from the central axis O to a portion of the second curved section farthest from the central axis O is represented by L1, and when a distance from the central axis O to a part of the opening portion nearest to the central axis O is represented by L2, L2>L1 is satisfied.
    Type: Application
    Filed: September 10, 2018
    Publication date: September 3, 2020
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Yuji Yamagami, Tomohiko Yokoyama, Kazutoshi Kohira, Shin Haraguchi
  • Patent number: 10615401
    Abstract: A cylindrical battery according to an aspect of the present invention includes an electrode assembly including a positive electrode plate and a negative electrode plate wound together via a separator, an electrolytic solution, a bottomed cylindrical housing can, and a sealing unit fixed by crimping of an open end of the housing can via a gasket. The sealing unit includes a valve member having a circular outline, a metal plate connected to a central portion of the valve member so as to be farther inside the battery than the valve member, and an annular insulating member disposed between an outer peripheral portion of the valve member and an outer peripheral portion of the metal plate. The valve member has a sloping region in which the thickness decreases or increases continuously along the radial direction.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: April 7, 2020
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Naoto Kunoike, Kyosuke Miyata, Oose Okutani, Kazutoshi Kohira, Tomohiko Yokoyama, Shinya Geshi
  • Patent number: 10601002
    Abstract: A cylindrical battery in an aspect of the present invention includes an electrode body formed by winding a positive electrode plate and a negative electrode plate with a separator interposed therebetween; an electrolyte; a bottomed cylindrical outer can; and a sealing body crimped to an opening of the outer can via a gasket. The sealing body includes a valve body having an annular protrusion part, an insulating member disposed on an inner circumference of the protrusion part of the valve body and having a skirt portion, and a metal plate disposed on an inner circumference of the skirt portion of the insulating member and connected to a center portion of the valve body. The metal plate is crimped with the protrusion part of the valve body via the insulating member.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: March 24, 2020
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Shuji Sugimoto, Kyosuke Miyata, Oose Okutani, Kazutoshi Kohira, Tomohiko Yokoyama, Shinya Geshi
  • Publication number: 20200020897
    Abstract: An insulating plate for a secondary battery includes a wound electrode group, an electrolyte, a cylindrical battery case that houses the electrode group and the electrolyte, and a sealing body that seals an opening of the battery case and includes a discharge valve. The insulating plate is disposed between the electrode group and the sealing body and has a disk shape with a thickness T of 0.1 mm or more. The insulating plate has a first hole formed centrally therein and at least one second hole formed around the first hole so as to extend along the outer periphery of the disk shape. The ratio (=T/D) of the thickness T to a diameter D of the insulating plate is 0.016 or less, and the insulating plate has an opening ratio of 36% or less.
    Type: Application
    Filed: September 25, 2019
    Publication date: January 16, 2020
    Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.
    Inventors: Takeshi Enomoto, Tomohiko Yokoyama, Yuji Yamagami, Kazutoshi Kohira
  • Patent number: 10403872
    Abstract: A cylindrical battery having a sealing unit which includes at least a valve member, a metal plate disposed farther inside the battery than the valve member and having a joint portion connected to the valve member, and an annular insulating member disposed between an outer peripheral portion of the valve member and an outer peripheral portion of the metal plate. The metal plate has a groove-shaped thin portion disposed around the joint portion, and straight portions that have different angles to the normal to the metal plate are disposed on an inner peripheral side and an outer peripheral side of a cross section of the thin portion perpendicular to the longitudinal direction.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: September 3, 2019
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Kazutoshi Kohira, Kyosuke Miyata, Oose Okutani, Shuji Sugimoto, Tomohiko Yokoyama, Shinya Geshi
  • Publication number: 20180062124
    Abstract: A cylindrical battery having a sealing unit which includes at least a valve member, a metal plate disposed farther inside the battery than the valve member and having a joint portion connected to the valve member, and an annular insulating member disposed between an outer peripheral portion of the valve member and an outer peripheral portion of the metal plate. The metal plate has a groove-shaped thin portion disposed around the joint portion, and straight portions that have different angles to the normal to the metal plate are disposed on an inner peripheral side and an outer peripheral side of a cross section of the thin portion perpendicular to the longitudinal direction.
    Type: Application
    Filed: March 10, 2016
    Publication date: March 1, 2018
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Kazutoshi Kohira, Kyosuke Miyata, Oose Okutani, Shuji Sugimoto, Tomohiko Yokoyama, Shinya Geshi
  • Publication number: 20180047973
    Abstract: A cylindrical battery according to an aspect of the present invention includes an electrode assembly including a positive electrode plate and a negative electrode plate wound together via a separator, an electrolytic solution, a bottomed cylindrical housing can, and a sealing unit fixed by crimping of an open end of the housing can via a gasket. The sealing unit includes a valve member having a circular outline, a metal plate connected to a central portion of the valve member so as to be farther inside the battery than the valve member, and an annular insulating member disposed between an outer peripheral portion of the valve member and an outer peripheral portion of the metal plate. The valve member has a sloping region in which the thickness decreases or increases continuously along the radial direction.
    Type: Application
    Filed: March 10, 2016
    Publication date: February 15, 2018
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Naoto Kunoike, Kyosuke Miyata, Oose Okutani, Kazutoshi Kohira, Tomohiko Yokoyama, Shinya Geshi
  • Publication number: 20180047949
    Abstract: A cylindrical battery in an aspect of the present invention includes an electrode body formed by winding a positive electrode plate and a negative electrode plate with a separator interposed therebetween; an electrolyte; a bottomed cylindrical outer can; and a sealing body crimped to an opening of the outer can via a gasket. The sealing body includes a valve body having an annular protrusion part, an insulating member disposed on an inner circumference of the protrusion part of the valve body and having a skirt portion, and a metal plate disposed on an inner circumference of the skirt portion of the insulating member and connected to a center portion of the valve body. The metal plate is crimped with the protrusion part of the valve body via the insulating member.
    Type: Application
    Filed: March 10, 2016
    Publication date: February 15, 2018
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Shuji Sugimoto, Kyosuke Miyata, Oose Okutani, Kazutoshi Kohira, Tomohiko Yokoyama, Shinya Geshi
  • Patent number: 9876206
    Abstract: A nonaqueous electrolyte secondary battery representing an embodiment of a sealed battery of the present invention includes a bottomed cylindrical exterior case (15), a sealing member (20), a cylindrical wound electrode assembly (14) including a positive electrode plate (11) and a negative electrode plate (12) wound together via a separator (13), and an electrolyte. The cylindrical wound electrode assembly (14) and the electrolyte are accommodated in the exterior case (15). An open end of the exterior case (15) is crimped together with the sealing member (20) via an insulating gasket (21) so as to form a seal. The sealing member (20) includes a valving element (23) having a thin and fragile portion (22) and a support element (25) having an opening (24). The support element (25) is disposed on an outer side of the valving element (23), and a portion of the valving element (23) is exposed to an outside environment along the inner periphery of the opening (24) in the support element (25).
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: January 23, 2018
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Kazutoshi Kohira, Kyosuke Miyata
  • Publication number: 20170133645
    Abstract: A nonaqueous electrolyte secondary battery representing an embodiment of a sealed battery of the present invention includes a bottomed cylindrical exterior case, a sealing member, a cylindrical wound electrode assembly and an electrolyte. An open end of the exterior case is crimped together with the sealing member via an insulating gasket so as to form a seal. The sealing member includes a lid having a thin and fragile portion, an insulating ring, and a terminal plate having a thin and fragile portion. The terminal plate is electrically connected to a positive electrode current collector leading out from the cylindrical wound electrode assembly. The lid and the terminal plate are electrically connected within an opening of the insulating ring. The lid is disposed so as to expose an outer side of at least a portion of the lid opposed to the opening of the insulating ring directly to an outside environment.
    Type: Application
    Filed: March 18, 2015
    Publication date: May 11, 2017
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Kyosuke Miyata, Kazutoshi Kohira