Patents by Inventor Yoshimitsu Oda

Yoshimitsu Oda 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: 20200185688
    Abstract: A lead material (5) for a negative electrode is made of a clad material (50) including a Cu layer (51) made of Cu or a Cu alloy and Ni layers (52, 53) each made of Ni or a Ni alloy. The Ni layers are respectively bonded to opposite surfaces of the Cu layer. The Ni layers each include a surface (52b, 53b) not bonded to the Cu layer, the surface including an oxide film (52c, 53c) with a thickness of 30 nm or less.
    Type: Application
    Filed: December 22, 2017
    Publication date: June 11, 2020
    Applicant: Hitachi Metals, Ltd.
    Inventors: Yoshimitsu ODA, Keita WATANABE
  • Patent number: 10497923
    Abstract: A lead material for a battery includes a metal plate made of single metal, in which the hardness of a central portion is lower than the hardness of a surface layer portion.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: December 3, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Keita Watanabe, Yoshimitsu Oda
  • Publication number: 20190363367
    Abstract: A foil (5b) for a negative electrode collector of a secondary battery includes a Cu-coated foil (50) including an iron-based alloy layer (51) made of precipitation hardened stainless steel, and a pair of Cu layers (52, 53) respectively disposed on opposite surfaces of the iron-based alloy layer and made of Cu or a Cu-based alloy. The negative electrode collector foil has a thickness of 20 ?m or less and a volume resistivity of 7 ??·cm or less.
    Type: Application
    Filed: February 28, 2018
    Publication date: November 28, 2019
    Applicant: HITACHI METALS, LTD.
    Inventors: Yoshimitsu Oda, Ryoji Inoue, Wataru Kushima
  • Patent number: 10490824
    Abstract: This cladding material for a battery collector consists of a cladding material having a two-layer structure formed by bonding a first layer arranged on a first surface and constituted of an Al-based alloy and a second layer arranged on a second surface and constituted of a Cu-based alloy to each other by rolling. The ratio of the thickness of the first layer to the total thickness of the first layer and the second layer is not more than 35%.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: November 26, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Yoshimitsu Oda, Ryoji Inoue, Kenichi Funamoto
  • Patent number: 10454089
    Abstract: This clad material for a battery negative electrode lead material is constituted of a clad material of a three-layer structure including a first layer constituted of pure Ni, a second layer constituted of pure Cu and a third layer constituted of pure Ni. The thickness of a first diffusion layer formed between the first layer and the second layer and the thickness of a second diffusion layer formed between the second layer and the third layer are at least 0.5 ?m and not more than 3.5 ?m.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: October 22, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Yoshimitsu Oda, Keita Watanabe
  • Patent number: 10381650
    Abstract: This cladding material for a battery collector consists of a cladding material having a two-layer structure formed by bonding a first layer arranged on a first surface and constituted of an Al-based alloy and a second layer arranged on a second surface and constituted of a Cu-based alloy to each other by rolling. The ratio of the thickness of the first layer to the total thickness of the first layer and the second layer is not more than 35%.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: August 13, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Yoshimitsu Oda, Ryoji Inoue, Kenichi Funamoto
  • Publication number: 20190181456
    Abstract: A clad material (50) for a negative electrode collector of a secondary battery includes a Ni alloy layer (51) made of a Ni alloy that contains 0.005 mass % or more and 0.50 mass % or less of C, Ni, and inevitable impurities, and a pair of Cu layers (52, 53) respectively bonded to opposite surfaces of the Ni alloy layer and that contain 99 mass % or more of Cu.
    Type: Application
    Filed: December 20, 2017
    Publication date: June 13, 2019
    Applicant: HITACHI METALS, LTD.
    Inventors: Yoshimitsu Oda, Ryoji Inoue
  • Publication number: 20190148704
    Abstract: A lead material for a battery includes a metal plate made of single metal, in which the hardness of a central portion is lower than the hardness of a surface layer portion.
    Type: Application
    Filed: January 17, 2019
    Publication date: May 16, 2019
    Applicant: HITACHI METALS, LTD.
    Inventors: Keita Watanabe, Yoshimitsu Oda
  • Publication number: 20190119801
    Abstract: A method for manufacturing a clad material (110, 410) includes performing a Ni plating treatment on a Cu material (104, 404) made of Cu or a Cu-based alloy to make a Ni-plated Cu material in which the Cu material is covered with a Ni plating layer, performing a heat treatment on the Ni-plated Cu material at a holding temperature of 650° C. or higher and 850° C. or lower, and bonding an Al material (102, 402) made of Al or an Al-based alloy and the Ni-plated Cu material on which the heat treatment has been performed to each other by rolling to make the clad material.
    Type: Application
    Filed: February 19, 2018
    Publication date: April 25, 2019
    Applicant: HITACHI METALS, LTD.
    Inventor: Yoshimitsu Oda
  • Patent number: 10270079
    Abstract: A lead material for a battery includes a metal plate made of single metal, in which the hardness of a central portion is lower than the hardness of a surface layer portion.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: April 23, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Keita Watanabe, Yoshimitsu Oda
  • Patent number: 10193126
    Abstract: A battery terminal includes a shaft portion and a flange portion. The battery terminal is made of a clad material in which at least a first metal layer and a second metal layer are bonded to each other. Each of the shaft portion and the flange portion includes the first metal layer on a first side in a shaft direction and the second metal layer on a second side in the shaft direction. The first metal layer in the shaft portion includes a protruding portion that further protrudes to the second side in the shaft direction with respect to a surface of the first metal layer on the second side in the shaft direction in the flange portion.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: January 29, 2019
    Assignees: HITACHI METALS, LTD., AOYAMA SEISAKUSHO IBARAKI PLANT CO., LTD.
    Inventors: Yoshimitsu Oda, Masaharu Yamamoto, Masaaki Ishio, Naonori Ishii, Hirofumi Nakano
  • Patent number: 10026947
    Abstract: A battery terminal is made of a clad material in which a first metal layer made of an Al-based alloy, a second metal layer made of a Cu-based alloy, and a third metal layer made of a Ni-based alloy are bonded to each other in a state where the first metal layer, the second metal layer, and the third metal layer are stacked in this order. The battery terminal includes a shaft portion and a flange portion that radially expands from the shaft portion, and has the third metal layer at least in an end of the shaft portion on a first side in a shaft direction in which the shaft portion extends.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: July 17, 2018
    Assignee: HITACHI METALS, LTD.
    Inventors: Masayuki Yokota, Yoshimitsu Oda
  • Patent number: 9890438
    Abstract: An aluminum copper clad material has excellent bonding strength and includes an aluminum layer and a copper layer that are bonded without a nickel layer interposed therebetween. The aluminum layer and the copper layer are diffusion-bonded via an Al—Cu intermetallic compound layer. The copper layer satisfies Dcs?0.5×Dcc, where Dcc represents the average crystal grain size of crystal grains in a central portion in the thickness direction of the copper layer, and Dcs represents the average crystal grain size of an interface adjacent portion C2 in the copper layer that is about 0.5 ?m apart from the interface between the copper layer and the intermetallic compound layer. The intermetallic compound layer has an average thickness of about 0.5 ?m to about 10 ?m.
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: February 13, 2018
    Assignee: Hitachi Metals, Ltd.
    Inventors: Yoshimitsu Oda, Masaaki Ishio, Akio Hashimoto, Kenji Ikeuchi
  • Publication number: 20170162877
    Abstract: This cladding material for a battery collector consists of a cladding material having a two-layer structure formed by bonding a first layer arranged on a first surface and constituted of an Al-based alloy and a second layer arranged on a second surface and constituted of a Cu-based alloy to each other by rolling. The ratio of the thickness of the first layer to the total thickness of the first layer and the second layer is not more than 35%.
    Type: Application
    Filed: February 15, 2017
    Publication date: June 8, 2017
    Applicant: HITACHI METALS, LTD.
    Inventors: Yoshimitsu Oda, Ryoji Inoue, Kenichi Funamoto
  • Patent number: 9627676
    Abstract: The present invention relates to a lithium ion battery employed by connecting the positive electrode side to a negative electrode portion made of Cu or a Cu alloy by a bus bar made of Al or an Al alloy and provides a negative electrode terminal for a lithium ion battery capable of providing sufficient bonding strength between the negative electrode portion and the bus bar when the negative electrode portion and the bus bar are metallurgically bonded to each other by resistance welding or the like, for example. This negative electrode terminal for a lithium ion battery is made of a clad material having a first metal layer made of Al or an Al alloy and a second metal layer made of Cu or a Cu alloy bonded to each other through a reaction-suppressing layer suppressing a reaction therebetween.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: April 18, 2017
    Assignee: HITACHI METALS, LTD.
    Inventors: Yoshimitsu Oda, Masaaki Ishio, Yasuto Nozawa
  • Publication number: 20170077481
    Abstract: A lead material for a battery includes a metal plate made of single metal, in which the hardness of a central portion is lower than the hardness of a surface layer portion.
    Type: Application
    Filed: August 26, 2016
    Publication date: March 16, 2017
    Applicants: Hitachi Metals Neomaterial, Ltd., HITACHI METALS, LTD.
    Inventors: Keita Watanabe, Yoshimitsu Oda
  • Publication number: 20170054131
    Abstract: A battery terminal is made of a clad material in which a first metal layer made of an Al-based alloy, a second metal layer made of a Cu-based alloy, and a third metal layer made of a Ni-based alloy are bonded to each other in a state where the first metal layer, the second metal layer, and the third metal layer are stacked in this order. The battery terminal includes a shaft portion and a flange portion that radially expands from the shaft portion, and has the third metal layer at least in an end of the shaft portion on a first side in a shaft direction in which the shaft portion extends.
    Type: Application
    Filed: July 26, 2016
    Publication date: February 23, 2017
    Applicants: Hitachi Metals Neomaterial, Ltd., HITACHI METALS, LTD.
    Inventors: Masayuki Yokota, Yoshimitsu Oda
  • Patent number: 9559347
    Abstract: A negative electrode terminal for a battery in which a first metal layer and a second metal layer hardly separate from each other is provided by inhibiting an intermetallic compound from being formed between the first metal layer and the second metal layer. This negative electrode terminal (8) for a battery is composed of a clad material formed by bonding a first metal layer (80), made of Al, including a first region connected with a battery terminal connecting plate and an adjacent second region on the same surface side as the first region and a second metal layer (81), made of Ni, connected with battery negative electrodes, while the second metal layer is arranged to be stacked on the first metal layer in the second region of the first metal layer.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: January 31, 2017
    Assignee: HITACHI METALS, LTD.
    Inventors: Yoshimitsu Oda, Masaaki Ishio
  • Patent number: 9525228
    Abstract: A battery terminal includes an overlay clad plate material including at least a first metal layer made of Al or Al alloy and a second metal layer made of Cu or Cu alloy, formed by bonding at least the first metal layer and the second metal layer to each other in the thickness direction. Either the first metal layer or the second metal layer of the clad plate material is partially removed to form an exposure surface on which either the second metal layer or the first metal layer is exposed in the clad plate material.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: December 20, 2016
    Assignee: HITACHI METALS, LTD.
    Inventors: Yoshimitsu Oda, Masaharu Yamamoto, Masaaki Ishio
  • Publication number: 20160308198
    Abstract: This clad material for a battery negative electrode lead material is constituted of a clad material of a three-layer structure including a first layer constituted of pure Ni, a second layer constituted of pure Cu and a third layer constituted of pure Ni. The thickness of a first diffusion layer formed between the first layer and the second layer and the thickness of a second diffusion layer formed between the second layer and the third layer are at least 0.5 ?m and not more than 3.5 ?m.
    Type: Application
    Filed: April 13, 2016
    Publication date: October 20, 2016
    Applicant: HITACHI METALS, LTD.
    Inventors: Yoshimitsu Oda, Keita Watanabe