Patents by Inventor Shinobu Okayama

Shinobu Okayama 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: 20240030497
    Abstract: A method of manufacturing a battery is disclosed. The battery includes an electrode assembly including a positive electrode and a negative electrode, an electrolyte solution, and a battery case enclosing the electrode assembly and the electrolyte solution. The method includes an electrolyte filling step of filling the electrolyte solution into the battery case enclosing the electrode assembly, an X-ray applying step of applying X-rays to the battery case enclosing the electrode assembly and the electrolyte solution, and a checking step of checking a permeation state of the electrolyte solution in the electrode assembly based on an image obtained in the X-ray applying step. In the X-ray applying step, the tube current of an X-ray generator is higher than or equal to 100 ?A and lower than or equal to 10000 ?A.
    Type: Application
    Filed: July 21, 2023
    Publication date: January 25, 2024
    Inventors: Yoshihide ISOBE, Shinobu OKAYAMA
  • Publication number: 20230021456
    Abstract: A liquid composition is for use to feed carrier ions to a non-aqueous electrolyte secondary battery. The liquid composition includes a solvent and a dissolved substance. The dissolved substance includes an ionic compound. The ionic compound consists of a radical anion of an aromatic compound and a metal cation. The aromatic compound is a polyacene or a polyphenyl. The metal cation is an ion of the same type as the carrier ions.
    Type: Application
    Filed: August 30, 2022
    Publication date: January 26, 2023
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsuhiko NAGAYA, Shinobu OKAYAMA, Yukimasa NISHIDE, Nobuhiro OGIHARA, Yasuhito KONDO, Tsuyoshi SASAKI
  • Publication number: 20220181694
    Abstract: A main object of the present disclosure is to provide a composition capable of conveniently feeding carrier ions which contribute to charge and discharge. The present disclosure achieves the object by providing an electrolyte solution-containing liquid composition for use to feed carrier ions to a non-aqueous electrolyte secondary battery, the electrolyte solution-containing liquid composition comprises a liquid composition including a solvent and a dissolved substance; and an electrolyte solution, a content of the electrolyte solution in the electrolyte solution-containing liquid composition is 30% by volume or more and 50% by volume or less, the solvent includes 1,2-dimethoxyethane, the dissolved substance includes an ionic compound, the ionic compound is composed of a radical anion of an aromatic compound and a metal cation, the aromatic compound is polyacene or polyphenyl, and the metal cation being an ion of the same type as the carrier ions.
    Type: Application
    Filed: December 2, 2021
    Publication date: June 9, 2022
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsuhiko NAGAYA, Shinobu OKAYAMA, Nobuhiro OGIHARA, Yasuhito KONDO, Tsuyoshi SASAKI
  • Publication number: 20220181693
    Abstract: (A) A first lithium-ion battery is prepared. (B) A capacity loss of the first lithium-ion battery is detected. (C) Capacity restoration treatment is performed on the first lithium-ion battery having a detected capacity loss to produce a second lithium-ion battery. The first lithium-ion battery includes at least a positive electrode, a negative electrode, and an electrolyte solution. The electrolyte solution contains a lithium salt, a solvent, and an additive in advance of the detecting a capacity loss. The additive has an oxidation potential. The oxidation potential is higher than an OCP of the positive electrode in the first lithium-ion battery having a state of charge of 100%. The capacity restoration treatment involves charging the first lithium-ion battery in such a way that at least part of the additive is oxidized.
    Type: Application
    Filed: February 28, 2022
    Publication date: June 9, 2022
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satomi Uchida, Shinobu Okayama
  • Patent number: 11316196
    Abstract: (A) A first lithium-ion battery is prepared. (B) A capacity loss of the first lithium-ion battery is detected. (C) Capacity restoration treatment is performed on the first lithium-ion battery having a detected capacity loss to produce a second lithium-ion battery. The first lithium-ion battery includes at least a positive electrode, a negative electrode, and an electrolyte solution. The electrolyte solution contains a lithium salt, a solvent, and an additive in advance of the detecting a capacity loss. The additive has an oxidation potential. The oxidation potential is higher than an OCP of the positive electrode in the first lithium-ion battery having a state of charge of 100%. The capacity restoration treatment involves charging the first lithium-ion battery in such a way that at least part of the additive is oxidized.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: April 26, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satomi Uchida, Shinobu Okayama
  • Patent number: 10985413
    Abstract: A method for testing an all solid state battery with which the presence of short circuit or the presence of defect causing short circuit can be detected with high accuracy by a method in which a voltage is applied to a battery and the current value thereof is measured. The method includes the steps of: a resistance increasing step of increasing resistance of an all solid state battery to 3.2*105 ?·cm2 or more; a voltage applying step of applying voltage to an all solid state battery of which the resistance is increased; and a judging step of judging acceptability of the all solid state battery based on a current value measured in the voltage applying step.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: April 20, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masato Kamiya, Katsuhiko Nagaya, Norihiro Yamada, Shinobu Okayama, Takayuki Hojo
  • Publication number: 20210083334
    Abstract: A liquid composition is for use to feed carrier ions to a non-aqueous electrolyte secondary battery. The liquid composition includes a solvent and a dissolved substance. The dissolved substance includes an ionic compound. The ionic compound consists of a radical anion of an aromatic compound and a metal cation. The aromatic compound is a polyacene or a polyphenyl. The metal cation is an ion of the same type as the carrier ions.
    Type: Application
    Filed: August 27, 2020
    Publication date: March 18, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsuhiko NAGAYA, Shinobu OKAYAMA, Yukimasa NISHIDE, Nobuhiro OGIHARA, Yasuhito KONDO, Tsuyoshi SASAKI
  • Patent number: 10944125
    Abstract: A production method for a lithium-ion secondary battery includes configuring an electrode group provided with a positive electrode and a negative electrode, storing the electrode group, electrolytic solution, and a third electrode in a housing, charging the negative electrode by performing charging between the third electrode and the negative electrode inside the housing, and discharging the charged negative electrode by performing discharging between the third electrode and the negative electrode, thereby producing the lithium-ion secondary battery.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: March 9, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsuhiko Nagaya, Shinobu Okayama, Kyoko Kikuchi
  • Patent number: 10753978
    Abstract: A method for testing an all solid state battery with which the presence of short circuit or the presence of defect causing short circuit can be detected with high accuracy by a comparatively simple method in which a voltage is applied to a battery and the current value thereof is measured. The method comprising steps of: a resistance increasing step of increasing resistance of an all solid state battery to 3.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: August 25, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsuhiko Nagaya, Masato Kamiya, Shinobu Okayama
  • Patent number: 10714794
    Abstract: A lithium ion secondary battery includes a housing. An electrode group and an electrolytic solution are in the housing. The electrode group is immersed in the electrolytic solution. The electrode group includes a positive electrode including a positive electrode active material layer and a negative electrode including a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is disposed on a surface of the negative electrode current collector. A metal piece is electrically connected to the negative electrode current collector. The metal piece is disposed at a position at which at least a part of the metal piece is immersed in the electrolytic solution. An oxidation-reduction potential of the metal piece is within an overdischarging voltage range and is lower than an oxidation-reduction potential of the negative electrode current collector.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: July 14, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsuhiko Nagaya, Shinobu Okayama, Kyoko Kikuchi
  • Publication number: 20200203771
    Abstract: (A) A first lithium-ion battery is prepared. (B) A capacity loss of the first lithium-ion battery is detected. (C) Capacity restoration treatment is performed on the first lithium-ion battery having a detected capacity loss to produce a second lithium-ion battery. The first lithium-ion battery includes at least a positive electrode, a negative electrode, and an electrolyte solution. The electrolyte solution contains a lithium salt, a solvent, and an additive in advance of the detecting a capacity loss. The additive has an oxidation potential. The oxidation potential is higher than an OCP of the positive electrode in the first lithium-ion battery having a state of charge of 100%. The capacity restoration treatment involves charging the first lithium-ion battery in such a way that at least part of the additive is oxidized.
    Type: Application
    Filed: December 5, 2019
    Publication date: June 25, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satomi UCHIDA, Shinobu Okayama
  • Publication number: 20190331736
    Abstract: A main object of the present disclosure is to provide a method for testing an all solid state battery with which the presence of short circuit or the presence of defect causing short circuit can be detected with high accuracy by a comparatively simple method in which a voltage is applied to a battery and the current value thereof is measured. The present disclosure achieves the object by providing a method for testing an all solid state battery, the method comprising steps of: a resistance increasing step of increasing resistance of an all solid state battery to 3.
    Type: Application
    Filed: April 17, 2019
    Publication date: October 31, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsuhiko Nagaya, Masato Kamiya, Shinobu Okayama
  • Publication number: 20190280350
    Abstract: A main object of the present disclosure is to provide a method for testing an all solid state battery with which the presence of short circuit or the presence of defect causing short circuit can be detected with high accuracy by a comparatively simple method in which a voltage is applied to a battery and the current value thereof is measured. The present disclosure achieves the object by providing a method for testing an all solid state battery, the method comprising steps of: a resistance increasing step of increasing resistance of an all solid state battery to 3.2*105 ?·cm2 or more; a voltage applying step of applying voltage to an all solid state battery of which the resistance is increased; and a judging step of judging acceptability of the all solid state battery based on a current value measured in the voltage applying step.
    Type: Application
    Filed: February 27, 2019
    Publication date: September 12, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masato KAMIYA, Katsuhiko NAGAYA, Norihiro YAMADA, Shinobu OKAYAMA, Takayuki HOJO
  • Patent number: 10326172
    Abstract: The present invention provides a method for producing a secondary battery, capable of forming a uniform membrane on a wound body. Provided is a method including a step for reducing an internal pressure of an exterior, a step for pouring an electrolyte solution (E) into the exterior, a step for sealing the exterior, a step for impregnating the electrolyte solution (E) into the wound body from both axial end portions thereof, a step for performing initial charging of a battery, and a step for performing high-temperature aging of the battery. The additive LPFO is added into the electrolyte solution (E) in an amount such that the internal pressure of the exterior in the step for performing the high-temperature aging becomes equal to or higher than a saturation vapor pressure of the electrolyte solution (E) in the high-temperature aging.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: June 18, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akira Tsukui, Hiroyasu Kado, Shinobu Okayama
  • Publication number: 20190131656
    Abstract: A method of producing a lithium-ion secondary battery includes the following (?) and (?): (?) preparing a lithium-ion secondary battery, the lithium-ion secondary battery including at least a positive electrode, a negative electrode, and an electrolyte solution; and (?) adding a zwitterionic compound to the electrolyte solution. The negative electrode includes at least a negative electrode active material and a film. The film is formed on a surface of the negative electrode active material. The film contains a lithium compound. The zwitterionic compound contains a phosphonium cation or an ammonium cation and a carboxylate anion in one molecule.
    Type: Application
    Filed: October 31, 2018
    Publication date: May 2, 2019
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, SOPHIA SCHOOL CORPORATION
    Inventors: Shinobu OKAYAMA, Hiroyuki YAMAGUCHI, Kyoko KIKUCHI, Masahiro FUJITA
  • Publication number: 20180254532
    Abstract: A lithium ion secondary battery includes a housing. An electrode group and an electrolytic solution are in the housing. The electrode group is immersed in the electrolytic solution. The electrode group includes a positive electrode including a positive electrode active material layer and a negative electrode including a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is disposed on a surface of the negative electrode current collector. A metal piece is electrically connected to the negative electrode current collector. The metal piece is disposed at a position at which at least a part of the metal piece is immersed in the electrolytic solution. An oxidation-reduction potential of the metal piece is within an overdischarging voltage range and is lower than an oxidation-reduction potential of the negative electrode current collector.
    Type: Application
    Filed: February 27, 2018
    Publication date: September 6, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsuhiko NAGAYA, Shinobu OKAYAMA, Kyoko KIKUCHI
  • Patent number: 9958508
    Abstract: Provided is a method by which the degraded performance of a lithium ion secondary battery containing phosphorus atoms (P) in a nonaqueous electrolytic solution can be restored by subjecting the lithium ion secondary battery in which a coating film including P is formed on a positive electrode surface, to a comparatively simple treatment. The degraded performance recovery method for a lithium ion secondary battery disclosed herein includes an ultrasound treatment step of applying ultrasound to the lithium ion secondary battery. In the ultrasound treatment step, the frequency of the generated ultrasound is 900 kHz or higher, and the period of time in which the ultrasound is applied to the lithium ion secondary battery continuously is 5 min or more.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: May 1, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinobu Okayama, Satomi Uchida
  • Patent number: 9960453
    Abstract: Provided is a lithium ion secondary battery that enables lithium ion replenishment in a short period of time. The lithium ion secondary battery disclosed herein is provided with a wound electrode assembly in which a long sheet-shaped positive electrode and a long sheet-shaped negative electrode are wound such that the negative electrode is positioned on the outer side of the positive electrode; a third electrode that is disposed outside the wound electrode assembly and that has an Li supply source capable of supplying lithium ion; and a porous insulating film that is disposed between the wound electrode assembly and the third electrode and that is formed from a material usable as a separator in a battery.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: May 1, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hideyo Ebisuzaki, Shinobu Okayama, Tetsuro Kobayashi
  • Publication number: 20180108933
    Abstract: A production method for a lithium-ion secondary battery includes configuring an electrode group provided with a positive electrode and a negative electrode, storing the electrode group, electrolytic solution, and a third electrode in a housing, charging the negative electrode by performing charging between the third electrode and the negative electrode inside the housing, and discharging the charged negative electrode by performing discharging between the third electrode and the negative electrode, thereby producing the lithium-ion secondary battery.
    Type: Application
    Filed: September 19, 2017
    Publication date: April 19, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsuhiko NAGAYA, Shinobu OKAYAMA, Kyoko KIKUCHI
  • Publication number: 20170040651
    Abstract: Provided is a method by which the degraded performance of a lithium ion secondary battery containing phosphorus atoms (P) in a nonaqueous electrolytic solution can be restored by subjecting the lithium ion secondary battery in which a coating film including P is formed on a positive electrode surface, to a comparatively simple treatment. The degraded performance recovery method for a lithium ion secondary battery disclosed herein includes an ultrasound treatment step of applying ultrasound to the lithium ion secondary battery. In the ultrasound treatment step, the frequency of the generated ultrasound is 900 kHz or higher, and the period of time in which the ultrasound is applied to the lithium ion secondary battery continuously is 5 min or more.
    Type: Application
    Filed: August 2, 2016
    Publication date: February 9, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinobu OKAYAMA, Satomi UCHIDA