Patents by Inventor Taisuke Yamamoto

Taisuke Yamamoto 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: 11949091
    Abstract: A charging method of a non-aqueous electrolyte secondary battery involves a first charging step in which, defining x as the ratio of the capacity of a silicon compound to the rated capacity Q (0.1?x?0.5), charging is performed at a first fixed current value I1st that satisfies the expression below; and a high current charging step in which after completion of the first charging step, charging is performed at a fixed current value Imax higher than the first fixed current value I1st.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: April 2, 2024
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Masahiro Soga, Taisuke Yamamoto
  • Patent number: 11916220
    Abstract: A charging method of a non-aqueous electrolyte secondary battery involves a first charging step in which, defining x as the ratio of the capacity of a silicon compound to the rated capacity Q (0.1?x?0.5), charging is performed at a first fixed current value I1st that satisfies the expression below; and a high current charging step in which after completion of the first charging step, charging is performed at a fixed current value Imax higher than the first fixed current value I1st.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: February 27, 2024
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Masahiro Soga, Taisuke Yamamoto
  • Patent number: 11811255
    Abstract: A charging method of a non-aqueous electrolyte secondary battery involves a first charging step in which, defining x as the ratio of the capacity of a silicon compound to the rated capacity Q(0.1?x?0.5), a battery capacity Q1st that satisfies the expression below is charged at a first fixed current value; and a high current charging step in which, after completion of the first charging step, charging is performed at a fixed current value higher than the first fixed current value. 0.38x+0.063???Q1st/Q?0.38x+0.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: November 7, 2023
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Masahiro Soga, Taisuke Yamamoto
  • Patent number: 11495833
    Abstract: A battery comprises a first polarity terminal that is attached via a first insulating member to an opening of an outer case. A first polarity plate includes: a first core formed of a conductive material; and a first active material layer. A first drawn-out portion is formed from a side of the first core on the first polarity terminal side thereof being drawn further out than a side of the first active material layer on the first polarity terminal side thereof. The first drawn-out portion includes a first bent portion that is bent towards the radially inner or outer side of the electrode body. A first surface of a first polarity collector plate contacts the surface of the first bent portion on the first polarity terminal side, and the first polarity terminal connects directly or via a conductive member to a second surface of the first polarity collector plate.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: November 8, 2022
    Assignees: SANYO Electric Co., Ltd., PANASONIC HOLDINGS CORPORATION
    Inventors: Natsuhiko Mukai, Satoshi Yamamoto, Masaki Deguchi, Taisuke Yamamoto, Atsushi Ueda, Masanobu Takeuchi
  • Patent number: 11448702
    Abstract: A method for charging a nonaqueous electrolyte secondary battery includes a first charging step of charging a first capacity Q1st at a first constant current value I1st, the first capacity Q1st including a capacity range in which dQSi/dQ is more than or equal to a predetermined threshold value, a second charging step of charging a second capacity at a second constant current value more than the first constant current value, a detection step of acquiring at least one of dV/dQ and dQSi/dQ, and a changing step of changing at least one of the timing of switching between the first charging step and the second charging step and the first constant current value I1st on the basis of a change in time of dV/dQ or dQSi/dQ.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: September 20, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yuto Horiuchi, Taisuke Yamamoto
  • Patent number: 11362321
    Abstract: A negative electrode material includes a graphite material, an alkali metal salt, and at least one metal material selected from the group consisting of Fe, Mn, Mg, Ni, Pd, Rh, Os, and Pt. The graphite material contains natural graphite.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: June 14, 2022
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Tatsuya Akira, Taisuke Yamamoto
  • Patent number: 11271197
    Abstract: Disclosed is a negative electrode material for a non-aqueous electrolyte secondary battery, including: a lithium silicate phase; silicon particles dispersed in the lithium silicate phase; and at least one element Me dispersed in the lithium silicate phase, and selected from the group consisting of a rare-earth element and an alkaline-earth metal. The composition of the lithium silicate phase is represented, for example, by the formula: Li2zSiO2+z, and satisfies 0<z<2, and the element Me is dispersed in the lithium silicate phase, for example, as an Me oxide.
    Type: Grant
    Filed: February 16, 2018
    Date of Patent: March 8, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Taisuke Asano, Yohei Uchiyama, Taisuke Yamamoto, Tatsuya Akira, Norihisa Yamamoto, Hiroshi Minami
  • Patent number: 11196040
    Abstract: Disclosed is a negative electrode material including: a lithium silicate phase that contains a lithium silicate; and silicon particles that are dispersed in the lithium silicate phase, wherein the silicon particles have a crystallite size of 10 nm or more, and the lithium silicate has a composition represented by the following formula: Li2Si2O5.(x?2)SiO2, where 2<x?18 is satisfied.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: December 7, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yohei Uchiyama, Taisuke Yamamoto, Tatsuya Akira, Norihisa Yamamoto, Hiroshi Minami
  • Publication number: 20210364575
    Abstract: A method for charging a nonaqueous electrolyte secondary battery includes a first charging step of charging a first capacity Q1st at a first constant current value I1st, the first capacity Q1st including a capacity range in which dQSi/dQ is more than or equal to a predetermined threshold value, a second charging step of charging a second capacity at a second constant current value more than the first constant current value, a detection step of acquiring at least one of dV/dQ and dQSi/dQ, and a changing step of changing at least one of the timing of switching between the first charging step and the second charging step and the first constant current value I1st on the basis of a change in time of dV/dQ or dQSi/dQ.
    Type: Application
    Filed: May 20, 2019
    Publication date: November 25, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yuto Horiuchi, Taisuke Yamamoto
  • Publication number: 20210210792
    Abstract: A battery comprises a first polarity terminal that is attached via a first insulating member to an opening of an outer case. A first polarity plate includes: a first core formed of a conductive material; and a first active material layer. A first drawn-out portion is formed from a side of the first core on the first polarity terminal side thereof being drawn further out than a side of the first active material layer on the first polarity terminal side thereof. The first drawn-out portion includes a first bent portion that is bent towards the radially inner or outer side of the electrode body. A first surface of a first polarity collector plate contacts the surface of the first bent portion on the first polarity terminal side, and the first polarity terminal connects directly or via a conductive member to a second surface of the first polarity collector plate.
    Type: Application
    Filed: April 2, 2019
    Publication date: July 8, 2021
    Applicants: SANYO Electric Co., Ltd., Panasonic Corporation
    Inventors: Natsuhiko Mukai, Satoshi Yamamoto, Masaki Deguchi, Taisuke Yamamoto, Atsushi Ueda, Masanobu Takeuchi
  • Publication number: 20210119289
    Abstract: This non-aqueous electrolyte secondary battery that is an example of an embodiment comprises a winding type electrode body for which a positive electrode and a negative electrode are wound with a separator interposed. The electrode body has a positive electrode lead. The positive electrode lead has: a lead base made of metal that includes a first surface joined to the positive electrode, and a second surface on the side opposite to the first surface; and an insulating ceramic layer principally comprising an inorganic compound and formed over a range within the second surface of the lead base so as to face the negative electrode with at least the separator interposed therebetween.
    Type: Application
    Filed: April 2, 2019
    Publication date: April 22, 2021
    Applicants: SANYO Electric Co., Ltd., Panasonic Corporation
    Inventors: Natsuhiko Mukai, Satoshi Yamamoto, Masaki Deguchi, Taisuke Yamamoto, Atsushi Ueda, Masanobu Takeuchi
  • Publication number: 20210104728
    Abstract: A negative electrode material includes a graphite material, an alkali metal salt, and at least one metal material selected from the group consisting of Fe, Mn, Mg, Ni, Pd, Rh, Os, and Pt. The graphite material contains natural graphite.
    Type: Application
    Filed: February 14, 2018
    Publication date: April 8, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Tatsuya Akira, Taisuke Yamamoto
  • Publication number: 20200403220
    Abstract: A charging method of a non-aqueous electrolyte secondary battery involves a first charging step in which, defining x as the ratio of the capacity of a silicon compound to the rated capacity Q (0.1?x?0.5), charging is performed at a first fixed current value I1st that satisfies the expression below; and a high current charging step in which after completion of the first charging step, charging is performed at a fixed current value Imax higher than the first fixed current value I1st. 82/(81.8x+64)×(0.3/0.7)???I1st/Imax?82/(81.8x+64)×(0.3/0.7)+?(?=0.
    Type: Application
    Filed: January 25, 2019
    Publication date: December 24, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Masahiro Soga, Taisuke Yamamoto
  • Publication number: 20200403432
    Abstract: A charging method of a non-aqueous electrolyte secondary battery involves a first charging step in which, defining x as the ratio of the capacity of a silicon compound to the rated capacity Q(0.1?x?0.5), a battery capacity Q1st that satisfies the expression below is charged at a first fixed current value; and a high current charging step in which, after completion of the first charging step, charging is performed at a fixed current value higher than the first fixed current value. 0.38x+0.063???Q1st/Q?0.38x+0.
    Type: Application
    Filed: January 22, 2019
    Publication date: December 24, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Masahiro Soga, Taisuke Yamamoto
  • Publication number: 20200350591
    Abstract: A lithium battery including a negative electrode having a negative electrode active material layer that contains lithium silicate particles and a binder. The lithium silicate particles include composite particles including a lithium silicate phase and silicon particles dispersed in the lithium silicate phase, wherein a carbon material is present inside the composite particles, and an area ratio of the carbon material occupying a cross section of the composite particles is 0.008 to 6%. The binder includes at least a first resin, wherein the first resin is at least cue selected from the group consisting of polyacrylic acid, a polyacrylic acid salt, and their derivatives. The first resin is contained in an amount of 2 mass % or less in the negative electrode active material layer.
    Type: Application
    Filed: October 26, 2018
    Publication date: November 5, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yohei Uchiyama, Taisuke Yamamoto, Tatsuya Akira, Norihisa Yamamoto, Hiroshi Minami
  • Patent number: 10753492
    Abstract: A check valve includes a casing in which a fluid inlet, a valve chamber, a valve seat portion, and a fluid outlet are formed; a valve body disposed in the valve chamber; and an urging unit that urges the valve body to the valve seat portion side. The valve seat portion includes a first valve seat portion disposed on the fluid inlet side of the valve chamber, and a second valve seat portion disposed on an outer periphery side of the first valve seat portion. The valve body includes a first seal portion capable of coming into close contact with the first valve seat portion, a second seal portion capable of coming into close contact with the second valve seat portion, and a first hinge portion and a second hinge portion each of which is a starting point of bending of the second seal portion.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: August 25, 2020
    Assignee: MIURA CO., LTD.
    Inventors: Taisuke Yamamoto, Shinichiro Murakami
  • Publication number: 20200020932
    Abstract: Disclosed is a negative electrode material for a non-aqueous electrolyte secondary battery, including: a lithium silicate phase; silicon particles dispersed in the lithium silicate phase; and at least one element Me dispersed in the lithium silicate phase, and selected from the group consisting of a rare-earth element and an alkaline-earth metal. The composition of the lithium silicate phase is represented, for example, by the formula: Li2zSiO2+z, and satisfies 0<z<2, and the element Me is dispersed in the lithium silicate phase, for example, as an Me oxide.
    Type: Application
    Filed: February 16, 2018
    Publication date: January 16, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Taisuke Asano, Yohei Uchiyama, Taisuke Yamamoto, Tatsuya Akira, Norihisa Yamamoto, Hiroshi Minami
  • Publication number: 20190319261
    Abstract: Disclosed is a negative electrode material including: a lithium silicate phase that contains a lithium silicate; and silicon particles that are dispersed in the lithium silicate phase, wherein the silicon particles have a crystallite size of 10 nm or more, and the lithium silicate has a composition represented by the following formula: Li2Si2O5.(x?2)SiO2, where 2<x?18 is satisfied.
    Type: Application
    Filed: November 17, 2017
    Publication date: October 17, 2019
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yohei Uchiyama, Taisuke Yamamoto, Tatsuya Akira, Norihisa Yamamoto, Hiroshi Minami
  • Publication number: 20190219182
    Abstract: A check valve includes a casing in which a fluid inlet, a valve chamber, a valve seat portion, and a fluid outlet are formed; a valve body disposed in the valve chamber; and an urging unit that urges the valve body to the valve seat portion side. The valve seat portion includes a first valve seat portion disposed on the fluid inlet side of the valve chamber, and a second valve seat portion disposed on an outer periphery side of the first valve seat portion. The valve body includes a first seal portion capable of coming into close contact with the first valve seat portion, a second seal portion capable of coming into close contact with the second valve seat portion, and a first hinge portion and a second hinge portion each of which is a starting point of bending of the second seal portion.
    Type: Application
    Filed: July 27, 2017
    Publication date: July 18, 2019
    Inventors: Taisuke YAMAMOTO, Shinichiro MURAKAMI
  • Patent number: 10050262
    Abstract: Provided is a negative electrode for a non-aqueous electrolyte secondary battery, capable of improving the energy density and the cycle characteristics of the battery without lowering the initial charge/discharge efficiency of the battery. This negative electrode includes a negative electrode active material including a silicon oxide represented by SiOx and carbon material. A proportion of a mass of the silicon oxide relative to a total mass of the silicon oxide and the carbon material: y satisfies 0.03?y?0.3. A difference between a theoretical capacity density of the negative electrode active material and a charge capacity density of the negative electrode active material when a cutoff voltage is 5 mV relative to lithium metal: ?C (mAhg?1) satisfies L=?C/100 and 6y?L?12y+0.2.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: August 14, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANGEMENT CO., LTD.
    Inventors: Yuki Suehiro, Taisuke Yamamoto, Tatsuki Hiraoka, Katsumi Kashiwagi