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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Patent number: 11316236Abstract: Provided is a method for producing an electrode for solid-state batteries which comprises a PTC resistor layer containing an insulating inorganic substance and in which electronic resistance is low. The production method is a method for producing an electrode for solid-state batteries, wherein the method is a method for producing an electrode for use in a solid-state battery comprising a cathode, an anode and an electrolyte layer disposed between the cathode and the anode; wherein the electrode is at least one of the cathode and the anode, and the electrode comprises a current collector, an electrode active material layer and a PTC resistor layer disposed between the current collector and the electrode active material layer.Type: GrantFiled: July 23, 2019Date of Patent: April 26, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Norihiro Ose, Tomoya Suzuki, Hajime Hasegawa, Kazuo Yaso, Hideaki Nishimura, Yuki Matsushita
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Patent number: 11302953Abstract: A main object of the present disclosure is to provide a stacked battery in which an unevenness of short circuit resistance among a plurality of cells is suppressed. The present disclosure achieves the object by providing a stacked battery comprising: a plurality of cells in a thickness direction, wherein the plurality of cells are electrically connected in parallel; each of the plurality of cells includes a cathode current collector, a cathode active material layer, a solid electrolyte layer, an anode active material layer, and an anode current collector, in this order; the stacked battery includes a surface-side cell that is located on a surface side of the stacked battery, and a center-side cell that is located on a center side rather than the surface-side cell; and a contact resistance between the cathode current collector and the anode current collector in the surface-side cell is more than a contact resistance between the cathode current collector and the anode current collector in the center-side cell.Type: GrantFiled: April 13, 2018Date of Patent: April 12, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hajime Hasegawa, Yuki Matsushita, Hideaki Nishimura, Yusuke Okuhata, Norihiro Ose, Mitsuru Tateishi, Shigetaka Nagamatsu, Takayuki Uchiyama, Shigenori Hama, Dai Kato, Naohiro Mashimo, Hideyo Ebisuzaki, Ayano Kobayashi, Hisataka Fujimaki
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Patent number: 11283071Abstract: A cathode active material with high durability and a lithium ion secondary battery. The cathode active material is a cathode active material represented by a general formula Li(1+a)NixCoyMnzWtO2 (?0.05?a?0.2, x=1?y?z?t, 0?y<1, 0?t<1, 0<t?0.03), wherein the cathode active material satisfies the following formula (1): ?1/t1?0.92??(1) where t1 is an element concentration average of insides and grain boundaries of primary particles of a W element, and ?1 is an element concentration standard deviation of the insides and grain boundaries of the primary particles of the W element.Type: GrantFiled: May 5, 2017Date of Patent: March 22, 2022Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, Nichia CorporationInventors: Hajime Hasegawa, Keisuke Omori, Masato Hozumi, Masashi Kodama, Takumi Tanaka, Hideki Yoshida, Masato Sonoo, Yuuki Maeda
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Publication number: 20220021000Abstract: Provided is a sulfide all-solid battery having an anode current collector of powerful adhesiveness which is difficult to be sulfurized. The sulfide all-solid-state battery including: a cathode layer; an anode layer; and a sulfide solid electrolyte layer disposed between the cathode layer and the anode layer, wherein the anode layer has an anode mixture layer, and an anode current collector on a face of the anode mixture layer, the face being on an opposite side of the sulfide solid electrolyte layer, the anode current collector is electrolytic iron foil that does not substantially contain other elements, and the anode current collector has surface roughness Ra of 0.2 ?m to 0.6 ?m, and surface roughness Rz of 2 ?m to 6 ?m.Type: ApplicationFiled: July 14, 2021Publication date: January 20, 2022Applicants: Toyota Jidosha Kabushiki Kaisha, Toyo Kohan Co., Ltd.Inventors: Hajime Hasegawa, Shigetaka Nagamatsu, Shinichirou Horie, Koh Yoshioka, Toshifumi Koyanagi, Etsuro Tsutsumi, Michio Kawamura, Yuma Yoshizaki
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Patent number: 11196082Abstract: Provided are an anode mixture configured to provide excellent cycle characteristics when used in an all-solid-state lithium ion secondary battery, an anode containing the anode mixture, and an all-solid-state lithium ion secondary battery containing the anode. Disclosed is an anode mixture for an all-solid-state lithium ion secondary battery, wherein the anode mixture contains an anode active material, a solid electrolyte and an electroconductive material; wherein the anode active material contains at least one active material selected from the group consisting of a metal that is able to form an alloy with Li and an oxide of the metal; and wherein a value obtained by dividing, by a BET specific surface area (m2/g) of the solid electrolyte, a volume percentage (%) of the electroconductive material when a volume of the anode mixture is determined as 100 volume %, is 0.09 or more and 1.61 or less.Type: GrantFiled: April 9, 2018Date of Patent: December 7, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Norihiro Ose, Hajime Hasegawa, Yusuke Kintsu, Mitsutoshi Otaki
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Patent number: 11139462Abstract: 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; and wherein a surface roughness Ra of an electrode active material layer-contacting surface of the PTC resistor layer, is 1.1 ?m or less.Type: GrantFiled: July 23, 2019Date of Patent: October 5, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Norihiro Ose, Tomoya Suzuki, Hajime Hasegawa, Kazuo Yaso, Hideaki Nishimura, Yuki Matsushita
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Publication number: 20210285068Abstract: There is provided a hot rolled steel according to one aspect of the invention including, as a predetermined chemical composition: Bi: 0.0001 mass % to 0.0050 mass %, 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 measured on a cross section parallel to a rolling direction having an aspect ratio of more than 10 and 30 or less which is extended along the rolling direction, is 50 pieces/mm2 to 200 pieces/mm2.Type: ApplicationFiled: September 4, 2017Publication date: September 16, 2021Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Suguru YOSHIDA, Shinya TERAMOTO, Akira SHIGA, Manabu KUBOTA, Hajime HASEGAWA, Hideo MIZUKAMI
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Patent number: 11111568Abstract: 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: GrantFiled: September 30, 2016Date of Patent: September 7, 2021Assignee: NIPPON STEEL CORPORATIONInventors: Akira Shiga, Manabu Kubota, Hajime Hasegawa
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Patent number: 11108049Abstract: 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: GrantFiled: July 17, 2019Date of Patent: August 31, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Norihiro Ose, Tomoya Suzuki, Hajime Hasegawa, Kazuo Yaso, Hideaki Nishimura, Yuki Matsushita
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Patent number: 11098384Abstract: 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: GrantFiled: June 13, 2017Date of Patent: August 24, 2021Assignee: NIPPON STEEL CORPORATIONInventors: Hajime Hasegawa, Susumu Kudo, Mitsuhiro Matsushima, Tetsuro Sekiuchi
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Publication number: 20210242544Abstract: An all solid state battery in which positional displacement of a plurality of cells arranged along a thickness direction can be prevented is provided. The all solid state battery includes a plurality of cells connected in series, wherein the all solid state battery includes a cell unit A and a cell unit B, a first current collector A in the cell A and a second current collector B in the cell B are arranged to face each other, the first current collector A includes a tab A, the second current collector B includes a tab B, and the tab A and the tab B are fixed by a fixing portion.Type: ApplicationFiled: January 27, 2021Publication date: August 5, 2021Applicant: Toyota Jidosha Kabushiki KaishaInventors: Hajime Hasegawa, Takumi Tanaka, Satomi Yamamoto, Koichi Tanimoto
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Publication number: 20210242492Abstract: An all solid state battery in which shift in positions of a plurality of a cell unit arranged along a thickness direction can be prevented is provided. The all solid state battery includes a plurality of the cell unit connected in series. The all solid state battery includes a cell unit A and a cell unit B, a second current collector AY in the cell unit A and a second current collector BX in the cell unit B are arranged to face each other interposing a first insulating portion, and a tab AX, a tab AY, and a tab B are fixed by a fixing member.Type: ApplicationFiled: January 22, 2021Publication date: August 5, 2021Applicant: Toyota Jidosha Kabushiki KaishaInventors: Satomi Yamamoto, Keisuke Omori, Hajime Hasegawa
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Patent number: 11075409Abstract: A main object of the present disclosure is to provide a stacked battery in which the unevenness of short circuit resistance among a plurality of cells is suppressed.Type: GrantFiled: April 13, 2018Date of Patent: July 27, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hajime Hasegawa, Yuki Matsushita, Hideaki Nishimura, Yusuke Okuhata, Norihiro Ose, Mitsuru Tateishi, Shigetaka Nagamatsu, Takayuki Uchiyama, Shigenori Hama, Dai Kato, Naohiro Mashimo, Hideyo Ebisuzaki, Ayano Kobayashi, Hisataka Fujimaki
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Publication number: 20210226194Abstract: A main object of the present disclosure is to provide an anode layer with little resistance increase due to charge and discharge. In the present disclosure, the above object is achieved by providing an anode layer comprising: an anode active material including a Nb element, a W element, and an O element; and a solid electrolyte, and an expansion coefficient of the anode active material when charged to 200 mAh per 1 g is 1.4% or more and 5% or less.Type: ApplicationFiled: January 22, 2020Publication date: July 22, 2021Inventors: Hajime HASEGAWA, Hideaki NISHIMURA, Shigenori HAMA, Satoshi MIZUTANI, Masataka TOMITA
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Patent number: 11069947Abstract: 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 a carbon-containing electroconductive material, an insulating inorganic substance and a fluorine-containing polymer.Type: GrantFiled: July 23, 2019Date of Patent: July 20, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Norihiro Ose, Tomoya Suzuki, Hajime Hasegawa, Kazuo Yaso, Hideaki Nishimura, Yuki Matsushita
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Patent number: 11050060Abstract: 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: GrantFiled: July 17, 2019Date of Patent: June 29, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Norihiro Ose, Tomoya Suzuki, Hajime Hasegawa, Kazuo Yaso, Hideaki Nishimura, Yuki Matsushita
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Patent number: 11011810Abstract: Disclosed is a stacked battery that can flow a larger rounding current in a short-circuit current shunt part than in an electric element when a short circuit occurs in the short-circuit current shunt part and the electric element in nailing, the stacked battery in which an electrical resistance of a current collector tab of the short-circuit current shunt part is smaller than an electrical resistance of a current collector tab of the electric element.Type: GrantFiled: April 13, 2018Date of Patent: May 18, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hajime Hasegawa, Norihiro Ose, Shigenori Hama, Hideaki Nishimura, Yuki Matsushita, Yusuke Okuhata, Mitsuru Tateishi, Hideyo Ebisuzaki
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Publication number: 20210126282Abstract: Disclosed is an all-solid-state lithium ion secondary battery being excellent in cycle characteristics. The all-solid-state lithium ion secondary battery may be an all-solid-state lithium ion secondary battery, wherein an anode comprises an anode active material, an electroconductive material and a solid electrolyte; wherein the anode active material comprises at least one active material selected from the group consisting of a metal that is able to form an alloy with Li, an oxide of the metal, and an alloy of the metal and Li; and wherein a bulk density of the solid electrolyte is 0.3 g/cm3 or more and 0.6 g/cm3 or less.Type: ApplicationFiled: April 13, 2018Publication date: April 29, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Norihiro OSE, Hajime HASEGAWA, Mitsutoshi OTAKI, Yusuke KINTSU
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Patent number: 10910666Abstract: Disclosed is a method for producing an all-solid-state lithium ion secondary battery being excellent in cycle characteristics. The production method may be a method for producing an all-solid-state lithium ion secondary battery, wherein the method comprises an anode mixture forming step of obtaining an anode mixture by drying a raw material for an anode mixture, which contains an anode active material, a solid electrolyte and an electroconductive material; and wherein, for the anode mixture after being dried in the anode mixture forming step, a voidage V of the inside of the anode mixture calculated by the following formula (1) is 43% or more and 54% or less: V=100?(D1/D0)×100??Formula (1).Type: GrantFiled: April 11, 2018Date of Patent: February 2, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Norihiro Ose, Hajime Hasegawa, Mitsutoshi Otaki, Yusuke Kintsu
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Patent number: 10910677Abstract: An objective of the present disclosure is to provide a stacked battery that suppresses sneak current caused by an unevenness of a short circuit resistance among a plurality of cells. The present disclosure provides a stacked battery comprising: a plurality of cells in a thickness direction, wherein the plurality of cells are electrically connected in parallel; the stacked battery includes a surface-side cell that is located on a surface side of the stacked battery, and a center-side cell that is located on a center side rather than the surface-side cell; wherein a resistance of the cathode current collecting tab in the surface-side cell is more than a resistance of the cathode current collecting tab in the center-side cell; or a resistance of the anode current collecting tab in the surface-side cell is more than a resistance of the anode current collecting tab in the center-side cell.Type: GrantFiled: April 13, 2018Date of Patent: February 2, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hajime Hasegawa, Yuki Matsushita, Hideaki Nishimura, Yusuke Okuhata, Norihiro Ose, Mitsuru Tateishi, Shigetaka Nagamatsu, Takayuki Uchiyama, Shigenori Hama, Dai Kato, Naohiro Mashimo, Hideyo Ebisuzaki, Ayano Kobayashi, Hisataka Fujimaki