Patents by Inventor Hajime Hasegawa
Hajime Hasegawa 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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Publication number: 20200036009Abstract: An electrode for solid-state batteries, comprising a PTC resistor layer, and a solid-state battery comprising the electrode. The electrode may be an electrode for solid-state batteries, wherein the electrode comprises an electrode active material layer, a current collector and a PTC resistor layer which is disposed between the electrode active material layer and the current collector and which is in contact with the electrode active material layer; wherein the PTC resistor layer contains an electroconductive material, an insulating inorganic substance and a polymer.Type: ApplicationFiled: July 17, 2019Publication date: January 30, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Norihiro OSE, Tomoya SUZUKI, Hajime HASEGAWA, Kazuo YASO, Hideaki NISHIMURA, Yuki MATSUSHITA
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Publication number: 20190348663Abstract: To suppress heat generation in a short-circuit current shunt part in a stacked battery that includes the short-circuit current shunt part, in the stacked battery 100 including at least one short-circuit current shunt part 10, and a stack 20 that includes a plurality of electric elements 20a, 20b which are stacked, the short-circuit current shunt part 10 includes a first part 10a that is provided on one end side in a stacking direction of the stack 20, a second part 10b that is provided on another end side therein, and a third part 10c that connects the first part 10a and the second part 10b; at the first part 10a, the first current collector layer 11 and the cathode current collector layer 21 have an electric connection part 14a but the second current collector layer 12 and the anode current collector layer 25 do not have any electric connection part, at the second part 10b, the second current collector layer 12 and the anode current collector layer 25 have an electric connection part 14b but the first currenType: ApplicationFiled: April 25, 2019Publication date: November 14, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hajime HASEGAWA, Norihiro Ose, Hideaki Nishimura, Yuki Matsushita
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Publication number: 20190319252Abstract: In the stacked battery, a short-circuit current shunt part is electrically connected to the electric elements, and an insulating layer of the short-circuit current shunt part is constituted of material having a predetermined melting point or glass transition temperature. When heat is excessively generated in the battery due to internal short circuits etc. and the temperature of the battery reaches the melting point of the insulating layer, the insulating layer melts and its shape is changed to short-circuit the short-circuit current shunt part, and current flows from the electric elements into the short-circuit current shunt part. To measure the current flowing into the short-circuit current shunt part makes it possible to easily grasp excessive heat generation of the battery to suppress deterioration of the battery due to heat generation.Type: ApplicationFiled: February 26, 2019Publication date: October 17, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hajime HASEGAWA, Norihiro OSE, Hideaki NISHIMURA, Yuki MATSUSHITA
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Publication number: 20190305294Abstract: Copper reacts with a sulfide solid electrolyte to generate copper sulfide when an anode current collector layer made from copper, and an anode mixture layer containing the sulfide solid electrolyte are used to compose an anode, and the resistance of the interface between the anode current collector layer and the anode mixture layer increases. To alloy an anode current collector layer to lower the reactivity to a sulfide solid electrolyte, specifically, an anode includes: an anode mixture layer; and an anode current collector layer that is in contact with the anode mixture layer, wherein the anode mixture layer contains an anode active material and a sulfide solid electrolyte, and at least a surface of the anode current collector layer is made from material that contains an alloy of copper and metal of a higher ionization tendency than copper, the surface being in contact with the anode mixture layer.Type: ApplicationFiled: March 15, 2019Publication date: October 3, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsuru TATEISHI, Yusuke OKUHATA, Hajime HASEGAWA, Hirokazu KAWAOKA, Hideaki MIYAKE
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Publication number: 20190292613Abstract: A sulfur additive is added to molten steel. At that time, the yield of sulfur in the molten steel is stabilized and nozzle blockage at the time of continuous casting due to impurities is prevented. A sulfur additive used for molten steel which contains iron sulfide ore particles with a particle size of 5.0 to 37.5 mm in 85 mass % or more with respect to the total mass % of the sulfur additive is used to produce Al deoxidized resulfurized steel containing S: 0.012 to 0.100 mass %.Type: ApplicationFiled: June 13, 2017Publication date: September 26, 2019Applicant: NIPPON STEEL CORPORATIONInventors: Hajime HASEGAWA, Susumu KUDO, Mitsuhiro MATSUSHIMA, Tetsuro SEKIUCHI
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Publication number: 20190264305Abstract: A steel for cold forging has a predetermined chemical composition, satisfies d+3??10.0 and SA/SB<0.30, includes 1200/mm2 or more of sulfides having an equivalent circle diameter of 1.0 to 10.0 ?m in a microstructure, and has an average distance between the sulfides of less than 30.0 ?m. Here, d is an average value of equivalent circle diameters of sulfides having an equivalent circle diameter of 1.0 ?m or more, ? is a standard deviation of the equivalent circle diameters of the sulfides having an equivalent circle diameter of 1.0 ?m or more, SA is the number of sulfides having an equivalent circle diameter of 1.0 ?m or more and less than 3.0 ?m, and SB is the number of the sulfides having an equivalent circle diameter of 1.0 ?m or more.Type: ApplicationFiled: September 30, 2016Publication date: August 29, 2019Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Akira SHIGA, Manabu KUBOTA, Hajime HASEGAWA
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Patent number: 10396394Abstract: A method for producing a sulfide all-solid-state battery with a high capacity retention rate, and a sulfide all-solid-state battery with a high capacity retention rate. The method for producing a sulfide all-solid-state battery may comprise forming a sulfide all-solid-state battery, initially charging the sulfide all-solid-state battery after the forming of the sulfide all-solid-state battery, and exposing the sulfide all-solid-state battery to an oxygen-containing gas atmosphere at at least any one of a time of the initially charging of the sulfide all-solid-state battery and a time after the initially charging of the sulfide all-solid-state battery.Type: GrantFiled: December 13, 2016Date of Patent: August 27, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hajime Hasegawa, Norihiro Ose, Kengo Haga, Mitsutoshi Otaki, Keisuke Omori, Takeshi Tojigamori
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Publication number: 20190256957Abstract: A steel according to an aspect of the present invention includes, as a chemical composition, by unit mass %, C: 0.15% to 0.40%, Mn: 0.10% to 1.50%, S: 0.002% to 0.020%, Ti: 0.005% to 0.050%, B: 0.0005% to 0.0050%, Bi: 0.0010% to 0.0100%, P: 0.020% or less, N: 0.0100% or less, Si: 0% or more and less than 0.30%, Cr: 0% to 1.50%, Al: 0% to 0.050%, Mo: 0% to 0.20%, Cu: 0% to 0.20%, Ni: 0% to 0.20%, Nb: 0% to 0.030%, and a remainder including Fe and impurities.Type: ApplicationFiled: September 28, 2016Publication date: August 22, 2019Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Manabu KUBOTA, Akira SHIGA, Hajime HASEGAWA
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Publication number: 20190245190Abstract: To stabilize shunt resistance of a short-circuit current shunt part when the short-circuit current shunt part short-circuits due to nail penetration etc.Type: ApplicationFiled: January 29, 2019Publication date: August 8, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideaki WATANABE, Masaharu Senoue, Hajime Hasegawa, Norihiro Ose, Hideaki Nishimura
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Patent number: 10355267Abstract: A method is provided where an anode of an all-solid-state lithium ion secondary battery is easily doped with lithium and to provide a small resistance at a low battery capacity. The method includes a manufacturing method of a cathode including mixing at least a conductive assistant (C1) and a sulfide solid electrolyte (E1) to obtain a mixture; and mixing at least one cathode active material, a solid electrolyte (E2) and the mixture obtained from the first step to obtain a cathode mixture, wherein an amount of energy added to the sulfide solid electrolyte (E1) is larger than an amount of energy added to the solid electrolyte (E2), and the mixture is a material that releases lithium ions at a potential lower than a potential at which the cathode active material releases and occludes lithium ions. Manufacturing methods for a cathode and an all-solid-state lithium ion secondary battery including the cathode mixture are also disclosed.Type: GrantFiled: February 3, 2017Date of Patent: July 16, 2019Assignee: Toyota Jidosha Kabuhiki KaishaInventors: Norihiro Ose, Hikaru Aso, Keisuke Omori, Hajime Hasegawa, Mitsutoshi Otaki, Hideyuki Koga
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Patent number: 10351937Abstract: The present invention provides a high-strength steel sheet excellent in impact resistance. The high-strength steel sheet contains predetermined contents of C, Si, Mn, P, S, Al, Ti, N, and O, with the balance being iron and inevitable impurities, and has a steel sheet structure in which, in a ? thickness to ? thickness region across ¼ of a sheet thickness, 1 to 8% retained austenite is contained in volume fraction, an average aspect ratio of the retained austenite is 2.0 or less, an amount of solid-solution Mn in the retained austenite is 1.1 times an average amount of Mn or more, and TiN grains having a 0.5 ?m average grain diameter or less are contained, and a density of AlN grains with a 1 ?m grain diameter or more is 1.0 pieces/mm2 or less, wherein a maximum tensile strength is 900 MPa or more.Type: GrantFiled: July 27, 2012Date of Patent: July 16, 2019Assignee: NIPPON STEEL CORPORATIONInventors: Hiroyuki Kawata, Naoki Maruyama, Akinobu Murasato, Akinobu Minami, Hajime Hasegawa, Chisato Wakabayashi, Tsuyoshi Oki
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Patent number: 10344363Abstract: There is a hot-rolled steel according to one aspect of the invention including predetermined chemical compositions including 0.0001 to 0.0050 mass % of Bi, in which 90 area % or more of a metallographic structure is configured with a ferrite and a pearlite, and an average number density of Mn sulfides extending along a rolling direction and having an aspect ratio exceeding 10 and equal to or smaller than 30, which is measured on a cross section parallel to the rolling direction, is 50 to 200 number/mm2.Type: GrantFiled: October 19, 2016Date of Patent: July 9, 2019Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Suguru Yoshida, Shinya Teramoto, Akira Shiga, Manabu Kubota, Hajime Hasegawa, Hideo Mizukami
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Patent number: 10297874Abstract: A method of manufacturing an all-solid-state battery includes a lamination step of laminating a deactivated lithium-containing negative electrode active material layer containing deactivated lithium, a solid electrolyte layer for the all-solid-state battery, and a positive electrode active material layer for the all-solid-state battery such that the solid electrolyte layer for the all-solid-state battery is disposed between the deactivated lithium-containing negative electrode active material layer and the positive electrode active material layer for the all-solid-state battery.Type: GrantFiled: September 14, 2016Date of Patent: May 21, 2019Assignee: Toyota Jidosha Kabushiki KaishaInventors: Keisuke Omori, Hajime Hasegawa, Kengo Haga, Mitsutoshi Otaki, Norihiro Ose, Daichi Kosaka, Masato Hozumi
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Publication number: 20190140311Abstract: An all-solid state battery including at least one short-circuit current shunt part and a plurality of electric elements, the short-circuit current shunt part and the electric elements being stacked, wherein the shunt part includes a first and a second current collector layers, and an insulating layer between the first and second current collector layers, all being stacked, each of the electric elements includes a cathode current collector layer, a cathode material layer, a solid electrolyte layer, an anode material layer, and an anode current collector layer, all of these layers being stacked, the first current collector layer connected with the cathode current collector layer, the second current collector layer connected with the anode current collector layer, the electric elements are electrically connected with each other in parallel, and a plurality of sheets of metal foil, the one being arranged on a side wherein a nail penetrates in nail penetration testing.Type: ApplicationFiled: September 25, 2018Publication date: May 9, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hajime HASEGAWA, Norihiro OSE, Hideaki NISHIMURA
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Publication number: 20180371603Abstract: A steel according to an aspect of the present invention has a chemical composition within a predetermined range, in which a hardenability index Ceq ranges from greater than 7.5 to smaller than 44.0, a metallographic structure includes ferrite ranging from 85 to 100 area %, an average distance between sulfides, which are observed in a cross section parallel to a rolling direction of the steel and have an equivalent circle diameter ranging from 1 ?m or greater to smaller than 2 ?m, is shorter than 30.0 ?m, and a presence density of the sulfides, which are observed in the cross section parallel to the rolling direction of the steel and have an equivalent circle diameter ranging from 1 ?m or greater to smaller than 2 ?m, is 300 pieces/mm2 or more.Type: ApplicationFiled: November 25, 2016Publication date: December 27, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Akira SHIGA, Manabu KUBOTA, Hajime HASEGAWA, Hideo MIZUKAMI
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Publication number: 20180355455Abstract: The present invention adopts a hot rolled bar or hot rolled wire rod including a chemical composition including, by mass %, C: 0.05 to 0.30%, Si: 0.30 to 0.60%, Mn: 0.40 to 1.0%, S: 0.008 to less than 0.040%, Cr: 1.60 to 2.00%, Mo: 0.1% or less, Al: 0.025 to 0.05%, N: 0.010 to 0.025%, Ti: 0.003% or less, Bi: 0.0001 to 0.0050%, and a remainder including Fe and impurities, in which amounts of P and O in the impurities are respectively P: 0.025% or less and O: 0.002% or less; in which a microstructure includes ferrite-pearlite or ferrite-pearlite-bainite, and an Expression (1) is satisfied. 1.70?Cr+2×Mo?2.Type: ApplicationFiled: March 31, 2016Publication date: December 13, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Akira SHIGA, Manabu KUBOTA, Hajime HASEGAWA
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Publication number: 20180347025Abstract: A steel according to an aspect of the present invention has a chemical composition within a predetermined range, in which a hardenability index Ceq ranges from greater than 7.5 to smaller than 44.0, an AlN precipitation index IAlN ranges from greater than 0.00030 to smaller than 0.00110, a metallographic structure includes ferrite ranging from 85 to 100 area %, an average distance between sulfides, which are observed in a cross section parallel to a rolling direction of the steel and have an equivalent circle diameter ranging from 1 ?m or greater to smaller than 2 ?m, is shorter than 30.0 ?m, and a presence density of the sulfides, which are observed in the cross section parallel to the rolling direction of the steel and have an equivalent circle diameter ranging from 1 ?m or greater to smaller than 2 ?m, is 300 pieces/mm2 or more.Type: ApplicationFiled: November 25, 2016Publication date: December 6, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Akira SHIGA, Hajime HASEGAWA, Manabu KUBOTA, Hideo MIZUKAMI
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Publication number: 20180342736Abstract: A main object of the present disclosure is to provide an electrode current collector that allows the short circuit resistance of an all-solid-state battery to increase and also allows the battery resistance during the normal use of a battery to be reduced. The present disclosure achieve the object by providing an electrode current collector to be used in an all-solid-state battery, the electrode current collector comprising: a current collecting layer, a resistive layer, and a coating layer in this order; an electron conductivity of the coating layer is 2×10?2 S/cm or more; the resistive layer includes an opening; and the current collecting layer contacts with the coating layer in the opening.Type: ApplicationFiled: May 3, 2018Publication date: November 29, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuki MATSUSHITA, Hajime HASEGAWA, Takayuki UCHIYAMA, Dai KATO
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Patent number: 10128675Abstract: An all-solid-state battery system comprising an all-solid-state battery comprising a positive electrode active material layer, a solid electrolyte layer, and a negative electrode active material layer, and a control device configured to control a charge-discharge voltage during use of the all-solid-state battery. The negative electrode active material layer includes alloy negative electrode active material particles. The amorphization degree of the alloy negative electrode active material particles is in the range of 27.8% to 82.8% and a ratio Z/W is in the range of 0.32 to 0.60, where Z is a controlled discharge capacity of the all-solid-state battery, and W is a theoretical capacity of the alloy negative electrode active material particles×a total weight of the alloy negative electrode active material particles×the amorphization degree.Type: GrantFiled: September 14, 2016Date of Patent: November 13, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsutoshi Otaki, Keisuke Omori, Norihiro Ose, Hajime Hasegawa, Kengo Haga
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Publication number: 20180323631Abstract: An all-solid-state battery system comprising an all-solid-state battery comprising a positive electrode active material layer, a solid electrolyte layer, and a negative electrode active material layer, and a control device configured to control a charge-discharge voltage during use of the all-solid-state battery. The negative electrode active material layer includes alloy negative electrode active material particles. The amorphization degree of the alloy negative electrode active material particles is in the range of 27.8% to 82.8% and a ratio Z/W is in the range of 0.32 to 0.60, where Z is a controlled discharge capacity of the all-solid-state battery, and W is a theoretical capacity of the alloy negative electrode active material particles×a total weight of the alloy negative electrode active material particles×the amorphization degree.Type: ApplicationFiled: July 16, 2018Publication date: November 8, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsutoshi OTAKI, Keisuke OMORI, Norihiro OSE, Hajime HASEGAWA, Kengo HAGA