Patents by Inventor Kaori Ishikawa
Kaori Ishikawa 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).
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Patent number: 11909033Abstract: In a nonaqueous electrolyte secondary battery, a negative electrode mix layer includes a first layer and a second layer disposed successively from a negative electrode collector. The first layer contains a first carbon-based active material having a 10% compressive strength of 3 MPa or less and a silicon-based active material containing Si. The second layer contains a second carbon-based active material having a 10% compressive strength of 5 MPa or more and has a lower content (mass ratio) of the silicon-based active material than the first layer.Type: GrantFiled: January 22, 2019Date of Patent: February 20, 2024Assignees: PANASONIC HOLDINGS CORPORATION, PANASONIC ENERGY CO., LTD.Inventors: Kouhei Tsuzuki, Yuki Morikawa, Hirokazu Wada, Yuta Matsuo, Kaori Ishikawa, Katsunori Yanagida
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Patent number: 11527749Abstract: A nonaqueous electrolyte secondary battery includes a negative electrode mixture layer formed on a negative electrode current collector. The negative electrode mixture layer includes a first layer and a second layer. The first layer is formed on the negative electrode current collector and includes a negative electrode active material and a first binding agent. The negative electrode active material in the first layer includes a carbon material A and a Si-containing compound. The second layer is formed on the first layer and includes a negative electrode active material and a second binding agent. The negative electrode active material in the second layer includes a carbon material B. The carbon material B has a tap density higher than a tap density of the carbon material A. A packing density of the second layer is lower than a packing density of the first layer.Type: GrantFiled: February 7, 2019Date of Patent: December 13, 2022Assignees: PANASONIC HOLDINGS CORPORATION, SANYO Electric Co., Ltd.Inventors: Daisuke Ito, Kaori Ishikawa, Yuta Matsuo, Yukitoshi Uehara
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Publication number: 20220293943Abstract: A negative electrode active material is prepared by mixing a first graphite particle and a second graphite particle. A negative electrode including the negative electrode active material is produced. A non-aqueous electrolyte secondary battery including the negative electrode, a positive electrode, and an electrolyte solution is produced. The first graphite particle has a first number-based particle size distribution. The second graphite particle has a second number-based particle size distribution. A relationship of “D250/D150?0.50” is satisfied. D150 is a D50 in the first number-based particle size distribution. D250 is a D50 in the second number-based particle size distribution. A relationship of “R2?R1” is satisfied. R1 is an arithmetic mean of circularity of the first graphite particle. R2 is an arithmetic mean of circularity of the second graphite particle.Type: ApplicationFiled: February 24, 2022Publication date: September 15, 2022Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.Inventors: Yuta MATSUO, Kaori ISHIKAWA, Kunihiko HAYASHI, Masumi TERAUCHI
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Publication number: 20220140310Abstract: (A) A first layer is formed by applying a first negative electrode slurry to the surface of a negative electrode substrate. (B) A second layer is formed by applying a second negative electrode slurry to the surface of the first layer. The first negative electrode slurry includes a first negative electrode composite material. The second negative electrode slurry includes a second negative electrode composite material. Each of the first negative electrode composite material and the second negative electrode composite material includes a negative electrode active material and a cellulose-based binder. The negative electrode active material includes a first graphite powder and a second graphite powder. The first negative electrode composite material includes the cellulose-based binder at a first mass fraction. The second negative electrode composite material includes the cellulose-based binder at a second mass fraction.Type: ApplicationFiled: October 14, 2021Publication date: May 5, 2022Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.Inventors: Kazuhiro Sotome, Kaori Ishikawa, Yuta Matsuo, Kentaro Takahashi, Daisuke Ikeda, Kunihiko Hayashi, Naoki UCHIDA
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Publication number: 20220052314Abstract: A negative electrode having a negative electrode collector; and a negative-electrode mixed material layer that is formed atop the negative electrode collector. The negative-electrode mixed material layer includes: a first layer which contains a first carbon-based active material, a silicon-based active material, a polyacrylic acid, or a salt thereof, the first layer being formed atop the negative electrode collector; and a second layer having a tap density greater than that of the first carbon-based active material and a BET specific surface area smaller than that of the first carbon-based active material. The mass of the first layer is at least 50 mass % but less than 90 mass % with respect to the mass of the negative-electrode mixed material layer, and the mass of the second layer is greater than 10 mass % but no more than 50 mass % with respect to the mass of the negative-electrode mixed material layer.Type: ApplicationFiled: November 27, 2019Publication date: February 17, 2022Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Kaori Ishikawa, Daisuke Ito, Yuta Matsuo, Mamoru Kuramoto
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Patent number: 11121439Abstract: A secondary battery includes a case composed of a metal containing aluminum as a main component, a stacked electrode assembly arranged in the case, a negative electrode current collector electrically connecting negative electrodes of the stacked electrode assembly to a negative electrode terminal, a positive electrode current collector electrically connecting positive electrodes of the stacked electrode assembly to a positive electrode terminal, a first metal plate arranged between the case and the stacked electrode assembly, and a spacer arranged between the case and the first metal plate, the spacer being composed of an insulating material. The positive electrodes are electrically connected to the case or a second metal plate arranged on the first metal plate with an insulating member provided between the first metal plate and the insulating member.Type: GrantFiled: November 29, 2016Date of Patent: September 14, 2021Assignee: PANASONIC CORPORATIONInventors: Kozo Watanabe, Isao Fujiwara, Kaori Ishikawa
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Publication number: 20210194002Abstract: This negative electrode for a nonaqueous electrolyte secondary battery is configured such that a negative electrode mixture layer has: a first layer that is formed on a negative electrode collector and that contains a first carbonaceous active material, a Si-based active material, a polyacrylic acid or a salt thereof, and a fibrous carbon; and a second layer that is formed on the first layer and that contains a second carbonaceous active material which has a tap density higher than that of the first carbonaceous active material.Type: ApplicationFiled: March 18, 2019Publication date: June 24, 2021Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Yuta Matsuo, Kaori Ishikawa, Daisuke Ito, Mamoru Kuramoto
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Publication number: 20210104750Abstract: A negative electrode includes a negative electrode current collector and a negative electrode mixture layer disposed on the current collector, the negative electrode mixture layer including a carbon material and a Si-containing compound. The negative electrode mixture layer includes a lower layer (a first layer) disposed on the negative electrode current collector, and an upper layer (a second layer) disposed on the lower layer. The lower layer includes the carbon material, the Si-containing compound, and a first binder including a polyacrylic acid or a salt thereof. The upper layer includes the carbon material and a second binder. The mass of the lower layer is not less than 50 mass % and less than 90 mass % of the mass of the negative electrode mixture layer, and the mass of the upper layer is more than 10 mass % and not more than 50 mass % of the mass of the negative electrode mixture layer.Type: ApplicationFiled: February 1, 2018Publication date: April 8, 2021Applicants: PANASONIC CORPORATION, SANYO Electric Co., Ltd.Inventors: Daisuke Ito, Yuta Matsuo, Kaori Ishikawa
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Publication number: 20210013496Abstract: In a nonaqueous electrolyte secondary battery, a negative electrode mix layer includes a first layer and a second layer disposed successively from a negative electrode collector. The first layer contains a first carbon-based active material having a 10% compressive strength of 3 MPa or less and a silicon-based active material containing Si. The second layer contains a second carbon-based active material having a 10% compressive strength of 5 MPa or more and has a lower content (mass ratio) of the silicon-based active material than the first layer.Type: ApplicationFiled: January 22, 2019Publication date: January 14, 2021Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.Inventors: Kouhei Tsuzuki, Yuki Morikawa, Hirokazu Wada, Yuta Matsuo, Kaori Ishikawa, Katsunori Yanagida
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Publication number: 20200365878Abstract: A negative electrode for a nonaqueous electrolyte with a negative electrode mixture layer that includes a first layer and a second layer. The first layer is formed on the negative electrode current collector and includes a negative electrode active material and a first binding agent. The negative electrode active material in the first layer includes a carbon material A and a Si-containing compound. The first binding agent includes polyacrylic acid or a salt thereof. The second layer is formed on the first layer and includes a negative electrode active material and a second binding agent. The negative electrode active material in the second layer includes a carbon material B. The carbon material B has a tap density higher than a tap density of the carbon material A. A packing density of the second layer is lower than a packing density of the first layer.Type: ApplicationFiled: December 14, 2018Publication date: November 19, 2020Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.Inventors: Kaori Ishikawa, Yuta Matsuo, Daisuke Ito, Kouhei Tsuzuki
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Publication number: 20200328409Abstract: A nonaqueous electrolyte secondary battery includes a negative electrode mixture layer formed on a negative electrode current collector. The negative electrode mixture layer includes a first layer and a second layer. The first layer is formed on the negative electrode current collector and includes a negative electrode active material and a first binding agent. The negative electrode active material in the first layer includes a carbon material A and a Si-containing compound. The second layer is formed on the first layer and includes a negative electrode active material and a second binding agent. The negative electrode active material in the second layer includes a carbon material B. The carbon material B has a tap density higher than a tap density of the carbon material A. A packing density of the second layer is lower than a packing density of the first layer.Type: ApplicationFiled: February 7, 2019Publication date: October 15, 2020Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.Inventors: Daisuke Ito, Kaori Ishikawa, Yuta Matsuo, Yukitoshi Uehara
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Publication number: 20170187025Abstract: A secondary battery includes a case composed of a metal containing aluminum as a main component, a stacked electrode assembly arranged in the case, a negative electrode current collector electrically connecting negative electrodes of the stacked electrode assembly to a negative electrode terminal, a positive electrode current collector electrically connecting positive electrodes of the stacked electrode assembly to a positive electrode terminal, a first metal plate arranged between the case and the stacked electrode assembly, and a spacer arranged between the case and the first metal plate, the spacer being composed of an insulating material. The positive electrodes are electrically connected to the case or a second metal plate arranged on the first metal plate with an insulating member provided between the first metal plate and the insulating member.Type: ApplicationFiled: November 29, 2016Publication date: June 29, 2017Inventors: KOZO WATANABE, ISAO FUJIWARA, KAORI ISHIKAWA
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Publication number: 20150266428Abstract: In a vehicle article holder detachably attached to vehicle equipment having a gripped portion and being installed at a predetermined position inside a vehicle, the holder includes a holder main body having a holding portion capable of detachably holding an article; a fixation body adjacent to and fixed to the main body and having a clamping portion capable of clamping part of the gripped portion of the equipment; and a lever body connected to the fixation body to be able to open and close the clamping portion. The fixation body, lever body, and main body are formed in such shapes that, in a state where an arbitrary part of the gripped portion is clamped by the clamping portion, another part thereof can be manually gripped. Accordingly, even when the holder is fixed to the gripped portion, a grip function of the gripped portion is not impaired.Type: ApplicationFiled: October 20, 2014Publication date: September 24, 2015Applicant: HONDA ACCESS CORP.Inventor: Kaori Ishikawa
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Publication number: 20130070385Abstract: A stacked structure includes: first and second electrode parts, and a dielectric layer. The first electrode part has a first strip portion and a plurality of first plate portions extending from a side edge of the first strip portion. The second electrode part has a second strip portion and a plurality of second plate portions extending from a side edge of the second strip portion. The first and second electrode parts are arranged such that the first and second plate portions are stacked. The first plate portions face the second plate portions and the second strip portion. The second plate portions face the first plate portions and the first strip portion. The dielectric layer is placed between the first plate portions and adjacent ones of the second plate portions, between the first plate portions and the second strip portion, and between the second plate portions and the first strip portion.Type: ApplicationFiled: September 11, 2012Publication date: March 21, 2013Applicant: SANYO ELECTRIC CO., LTD.Inventors: Gaku Harada, Miwa Ogawa, Kaori Ishikawa
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Publication number: 20110051319Abstract: An oxidizer liquid containing an oxidizer, a surfactant substance, and an additive comprising a dopant anion and a cation derived from a basic substance is applied onto a base member. Then, this is exposed to a vapor of a precursor monomer of a conducting polymer. After that, the monomer of the conducting polymer is chemically polymerized on the base member.Type: ApplicationFiled: August 26, 2010Publication date: March 3, 2011Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kaori ISHIKAWA, Gaku HARADA
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Publication number: 20060289882Abstract: An organic electroluminescent element comprising a cathode, an anode, an intermediate unit arranged between a cathode and an anode, a first light emitting unit arranged between a cathode and an intermediate unit, and a second light emitting unit arranged between an anode and an intermediate unit, wherein an electron extracting layer for extracting an electron from an adjacent layer adjoining a cathode side is provided in an intermediate unit, an absolute value of an energy level of a lowest unoccupied molecular orbital (LUMO) of an electron extracting layer |LUMO(A)|, and an absolute value of an energy level of a highest occupied molecular orbital (HOMO) of the adjacent layer |HOMO(B)| are in the relationship of |HOMO(B)|?|LUMO(A)|?1.5 eV, and an intermediate unit supplies a hole generated by extraction of an electron from an adjacent layer by an electron extracting layer and, at the same time, supplies the extracted electron to a second light emitting unit.Type: ApplicationFiled: July 29, 2005Publication date: December 28, 2006Inventors: Kazuki Nishimura, Yuji Hamada, Masahiro Iyori, Haruhisa Hashimoto, Masakazu Sakata, Hiroaki Izumi, Kaname Ito, Kaori Ishikawa, Hiroki Ishida