Patents by Inventor Nobuhiro Okada
Nobuhiro Okada 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: 11942621Abstract: Provided is a positive electrode precursor having a positive electrode active material layer, wherein the mass proportion A1 of a carbon material in the positive electrode active material layer accounts for 15-65 mass %, the mass proportion A2 of a lithium transition metal oxide in the positive electrode active material layer accounts for 5-35 mass %, the mass proportion A3 of an alkali metal compound in the positive electrode active material layer accounts for 10-50 mass %, A2/A1 is 0.10-2.00, A1/A3 is 0.50-3.00, and the positive electrode active material layer has a peel strength of 0.02-3.00 N/cm.Type: GrantFiled: November 13, 2018Date of Patent: March 26, 2024Assignee: Asahi Kasei Kabushiki KaishaInventors: Kazuteru Umetsu, Keita Kusuzaka, Yuichiro Hirakawa, Nobuhiro Okada
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Patent number: 11923541Abstract: A lithium ion secondary cell comprising a positive electrode, a negative electrode, and a non-aqueous electrolyte that contains lithium ions, the lithium ion secondary cell being such that: the positive electrode has a positive electrode current collector and a positive electrode active material layer; the positive electrode active material layer contains a positive electrode active material and a lithium compound; the positive electrode active material includes a transition metal oxide; the concentration of the lithium compound, which is the portion other than the positive electrode active material in the positive electrode active material layer, is 0.1-10 mass %; the negative electrode has a negative electrode current collector and a negative electrode active material layer; the negative electrode active material layer contains 50-95 mass % of a carbon material and 5-50 mass % of an alloy-based active material.Type: GrantFiled: July 16, 2019Date of Patent: March 5, 2024Assignee: Asahi Kasei Kabushiki KaishaInventors: Kazuteru Umetsu, Nobuhiro Okada
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Patent number: 11824203Abstract: Provided is a non-aqueous lithium-type electricity storage element which includes a positive electrode current collector having a positive electrode active material layer disposed thereon, wherein, in a solid-state 7Li-NMR spectrum of the positive electrode active material layer, a signal area ratio a/b, which is the ratio of a signal area ratio of component A having a signal at least at ?2 to 2.5 ppm to a signal area of component B having a signal at ?6 to ?2.5 ppm is 1.5 to 20.0.Type: GrantFiled: November 13, 2018Date of Patent: November 21, 2023Assignee: Asahi Kasei Kabushiki KaishaInventors: Yuima Kimura, Kazuteru Umetsu, Yuichiro Hirakawa, Hitoshi Morita, Nobuhiro Okada
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Patent number: 11478846Abstract: This electromagnetic stirring device configured to apply an electromagnetic force which generates a swirling flow around a vertical axis to molten metal in a mold by generating a rotating magnetic field in the mold, which is a quadrangular tubular mold for continuous casting, the electromagnetic stirring device provided with an iron core enclosing the mold at a side of the mold and including two teeth arranged side by side in a circumferential direction of the mold so as to face an outer side surface for each of outer side surfaces of the mold, coils wound around the respective teeth of the iron core, and a power supply device which applies an alternating current to each of the coils with a phase shift by 90° in arrangement order of the coils so as to generate the rotating magnetic field.Type: GrantFiled: April 24, 2019Date of Patent: October 25, 2022Assignee: NIPPON STEEL CORPORATIONInventor: Nobuhiro Okada
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Patent number: 11440085Abstract: This mold equipment is mold equipment provided with a mold, an electromagnetic brake device, and a control device. An immersion nozzle is provided with a pair of discharge holes of molten metal, the electromagnetic brake device is provided with an iron core including a pair of teeth and coils wound around the respective teeth, the coils on one side are connected in series in a first circuit, the coils on the other side are connected in series in a second circuit, and the control device is able to independently control voltage and current applied to each of the first and second circuits for each circuit, detects a drift of a discharge flow between the pair of discharge holes on the basis of the voltage applied to the coils in the first circuit and the voltage applied to the coils in the second circuit, and controls the current flowing through the first circuit and the current flowing through the second circuit on the basis of a detection result.Type: GrantFiled: June 19, 2019Date of Patent: September 13, 2022Assignee: NIPPON STEEL CORPORATIONInventors: Nobuhiro Okada, Shintaro Oga, Yuichi Tsukaguchi
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Patent number: 11387052Abstract: A nonaqueous lithium-type power storage element comprising a positive electrode, a negative electrode, a separator, and a nonaqueous electrolytic solution containing lithium ions. The negative electrode has: a negative electrode collector; and a negative electrode active material layer containing a negative electrode active material, said negative electrode active material layer being provided on one surface or both surfaces of the negative electrode collector. The negative electrode active material contains a carbonaceous material capable of storing or releasing lithium ions. Furthermore, the positive electrode has: a positive electrode collector; and a positive electrode active material layer containing a cathode active material, said positive electrode active material layer being provided on one surface or both surfaces of the positive electrode collector. The positive electrode active material contains activated carbon.Type: GrantFiled: March 16, 2020Date of Patent: July 12, 2022Assignee: Asahi Kasei Kabushiki KaishaInventors: Yuima Kimura, Kazuteru Umetsu, Hitoshi Morita, Nobuhiro Okada, Yuichiro Hirakawa, Yusuke Yamahata
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Patent number: 11107639Abstract: This positive electrode precursor includes: a positive electrode active material containing a carbon material and an alkali metal compound, wherein 5?A?35, when A (g/m2) is a weight of the alkali metal compound in the positive electrode active material layer at one surface of the positive electrode precursor, 10?B?100 as well as 0.20?A/B?1.00, when B (g/m2) is a weight of the positive electrode active material in the positive electrode active material layer, and 1?C?20, when C (m2/cm2) is a specific surface area per unit area as measured by the BET method at one surface of the positive electrode precursor.Type: GrantFiled: January 20, 2017Date of Patent: August 31, 2021Assignee: Asahi Kasei Kabushiki KaishaInventors: Kazuteru Umetsu, Nobuhiro Okada, Keita Kusuzaka
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Publication number: 20210202186Abstract: This positive electrode precursor includes: a positive electrode active material containing a carbon material and an alkali metal compound, wherein 5?A?35, when A (g/m2) is a weight of the alkali metal compound in the positive electrode active material layer at one surface of the positive electrode precursor, 10?B?100 as well as 0.20?A/B?1.00, when B (g/m2) is a weight of the positive electrode active material in the positive electrode active material layer, and 1?C?20, when C (m2/cm2) is a specific surface area per unit area as measured by the BET method at one surface of the positive electrode precursor.Type: ApplicationFiled: March 8, 2021Publication date: July 1, 2021Applicant: Asahi Kasei Kabushiki KaishaInventors: Kazuteru Umetsu, Nobuhiro Okada, Keita Kusuzaka
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Patent number: 11038173Abstract: A lithium ion secondary battery of the present disclosure is provided with a positive electrode, a negative electrode, a separator, and a nonaqueous electrolyte containing lithium ions.Type: GrantFiled: January 20, 2017Date of Patent: June 15, 2021Assignee: Asahi Kasei Kabushiki KaishaInventors: Kazuteru Umetsu, Hitoshi Morita, Nobuhiro Okada, Keita Kusuzaka, Takeshi Kamijo
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Patent number: 11027331Abstract: A molding facility in continuous casting enabling the quality of the cast slab to be achieved stably even if improving the productivity, the molding facility provided with a mold for continuous casting use, a first water box and second water box storing cooling water for cooling the mold, an electromagnetic stirring device imparting to molten metal in the mold an electromagnetic force causing a swirling flow to be generated in a horizontal plane, and an electromagnetic brake device imparting to a discharge flow of molten metal to an inside of the mold from a submerged nozzle an electromagnetic force in a direction braking the discharge flow, the first water box, the electromagnetic stirring device, the electromagnetic brake device, and the second water box being placed in that order from above to below at an outside surface of a long side mold plate of the mold so as to fit between a top end and bottom end of the long side mold plate, a core height H1 of the electromagnetic stirring device and a core height HType: GrantFiled: February 25, 2019Date of Patent: June 8, 2021Assignee: NIPPON STEEL CORPORATIONInventors: Nobuhiro Okada, Shintaro Oga, Yuichi Tsukaguchi
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Publication number: 20210138534Abstract: This electromagnetic stirring device configured to apply an electromagnetic force which generates a swirling flow around a vertical axis to molten metal in a mold by generating a rotating magnetic field in the mold, which is a quadrangular tubular mold for continuous casting, the electromagnetic stirring device provided with an iron core enclosing the mold at a side of the mold and including two teeth arranged side by side in a circumferential direction of the mold so as to face an outer side surface for each of outer side surfaces of the mold, coils wound around the respective teeth of the iron core, and a power supply device which applies an alternating current to each of the coils with a phase shift by 90° in arrangement order of the coils so as to generate the rotating magnetic field.Type: ApplicationFiled: April 24, 2019Publication date: May 13, 2021Applicant: NIPPON STEEL CORPORATIONInventor: Nobuhiro OKADA
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Publication number: 20210023610Abstract: This mold equipment is mold equipment provided with a mold, an electromagnetic brake device, and a control device. An immersion nozzle is provided with a pair of discharge holes of molten metal, the electromagnetic brake device is provided with an iron core including a pair of teeth and coils wound around the respective teeth, the coils on one side are connected in series in a first circuit, the coils on the other side are connected in series in a second circuit, and the control device is able to independently control voltage and current applied to each of the first and second circuits for each circuit, detects a drift of a discharge flow between the pair of discharge holes on the basis of the voltage applied to the coils in the first circuit and the voltage applied to the coils in the second circuit, and controls the current flowing through the first circuit and the current flowing through the second circuit on the basis of a detection result.Type: ApplicationFiled: June 19, 2019Publication date: January 28, 2021Applicant: NIPPON STEEL CORPORATIONInventors: Nobuhiro OKADA, Shintaro OGA, Yuichi TSUKAGUCHI
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Patent number: 10886533Abstract: Provided is a nonaqueous lithium power storage element that can suppress excessive decomposition of a lithium compound remaining in a positive electrode, can suppress gas generation at high voltages, and can suppress capacity declines during high-load charge/discharge cycling. The nonaqueous lithium power storage element according to the present embodiment has a positive electrode that contains a lithium compound other than an active material, a negative electrode, a separator, and a lithium ion-containing nonaqueous electrolyte, wherein in the elemental map provided by SEM-EDX of the surface of the positive electrode, the area overlap ratio U1 of the fluorine map relative to the oxygen map, as provided by binarization based on the average value of the brightness values, is 40% to 99%.Type: GrantFiled: January 20, 2017Date of Patent: January 5, 2021Assignee: Asahi Kasei Kabushiki KaishaInventors: Kazuteru Umetsu, Nobuhiro Okada, Koichi Hiraoka, Atsushi Hosokibara, Taku Suetomi
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Patent number: 10825616Abstract: Method of preparing a nonaqueous lithium power storage element, by providing a nonaqueous lithium power storage element comprising a positive electrode precursor containing a lithium compound other than an active material, a negative electrode, a separator, a nonaqueous electrolytic solution containing lithium ions, and a casing; and applying a voltage of 4.2V or more to the nonaqueous lithium power storage element to decompose the lithium compound in the positive electrode precursor and pre-dope the negative electrode with the lithium ions, while releasing a gas generated from decomposition of the lithium compound either out of an opening of the casing or through a degassing valve or gas permeable film.Type: GrantFiled: July 3, 2019Date of Patent: November 3, 2020Assignee: Asahi Kasei Kabushiki KaishaInventors: Kazuteru Umetsu, Nobuhiro Okada, Takeshi Kamijo
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Publication number: 20200331057Abstract: A molding facility in continuous casting enabling the quality of the cast slab to be achieved stably even if improving the productivity, the molding facility provided with a mold for continuous casting use, a first water box and second water box storing cooling water for cooling the mold, an electromagnetic stirring device imparting to molten metal in the mold an electromagnetic force causing a swirling flow to be generated in a horizontal plane, and an electromagnetic brake device imparting to a discharge flow of molten metal to an inside of the mold from a submerged nozzle an electromagnetic force in a direction braking the discharge flow, the first water box, the electromagnetic stirring device, the electromagnetic brake device, and the second water box being placed in that order from above to below at an outside surface of a long side mold plate of the mold so as to fit between a top end and bottom end of the long side mold plate, a core height H1 of the electromagnetic stirring device and a core height HType: ApplicationFiled: February 25, 2019Publication date: October 22, 2020Applicant: NIPPON STEEL CORPORATIONInventors: Nobuhiro OKADA, Shintaro OGA, Yuichi TSUKAGUCHI
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Publication number: 20200287234Abstract: A lithium ion secondary cell comprising a positive electrode, a negative electrode, and a non-aqueous electrolyte that contains lithium ions, the lithium ion secondary cell being such that: the positive electrode has a positive electrode current collector and a positive electrode active material layer; the positive electrode active material layer contains a positive electrode active material and a lithium compound; the positive electrode active material includes a transition metal oxide; the concentration of the lithium compound, which is the portion other than the positive electrode active material in the positive electrode active material layer, is 0.Type: ApplicationFiled: July 16, 2019Publication date: September 10, 2020Applicant: Asahi Kasei Kabushiki KaishaInventors: Kazuteru Umetsu, Nobuhiro Okada
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Publication number: 20200274169Abstract: Provided is a non-aqueous lithium-type electricity storage element which includes a positive electrode current collector having a positive electrode active material layer disposed thereon, wherein, in a solid-state 7Li-NMR spectrum of the positive electrode active material layer, a signal area ratio a/b, which is the ratio of a signal area ratio of component A having a signal at least at ?2 to 2.5 ppm to a signal area of component B having a signal at ?6 to ?2.5 ppm is 1.5 to 20.0.Type: ApplicationFiled: November 13, 2018Publication date: August 27, 2020Applicant: Asahi Kasei Kabushiki KaishaInventors: Yuima Kimura, Kazuteru Umetsu, Yuichiro Hirakawa, Hitoshi Morita, Nobuhiro Okada
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Patent number: 10748716Abstract: Provided is a nonaqueous lithium-type power storage element in which a lithium compound is included in positive electrode, wherein energy loss due to voltage decrease under high temperatures and high voltages is reduced, and the high-load charge and discharge cycle characteristics are exceptional.Type: GrantFiled: April 8, 2019Date of Patent: August 18, 2020Assignee: Asahi Kasei Kabushiki KaishaInventors: Kazuteru Umetsu, Yuichiro Hirakawa, Yuima Kimura, Hitoshi Morita, Nobuhiro Okada
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Publication number: 20200219665Abstract: A nonaqueous lithium-type power storage element comprising a positive electrode, a negative electrode, a separator, and a nonaqueous electrolytic solution containing lithium ions. The negative electrode has: a negative electrode collector; and a negative electrode active material layer containing a negative electrode active material, said negative electrode active material layer being provided on one surface or both surfaces of the negative electrode collector. The negative electrode active material contains a carbonaceous material capable of storing or releasing lithium ions. Furthermore, the positive electrode has: a positive electrode collector; and a positive electrode active material layer containing a cathode active material, said positive electrode active material layer being provided on one surface or both surfaces of the positive electrode collector. The positive electrode active material contains activated carbon.Type: ApplicationFiled: March 16, 2020Publication date: July 9, 2020Applicant: Asahi Kasei Kabushiki KaishaInventors: Yuima Kimura, Kazuteru Umetsu, Hitoshi Morita, Nobuhiro Okada, Yuichiro Hirakawa, Yusuke Yamahata
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Publication number: 20200194775Abstract: Provided is a positive electrode precursor having a positive electrode active material layer, wherein the mass proportion A1 of a carbon material in the positive electrode active material layer accounts for 15-65 mass %, the mass proportion A2 of a lithium transition metal oxide in the positive electrode active material layer accounts for 5-35 mass %, the mass proportion A3 of an alkali metal compound in the positive electrode active material layer accounts for 10-50 mass %, A2/A1 is 0.10-2.00, A1/A3 is 0.50-3.00, and the positive electrode active material layer has a peel strength of 0.02-3.00 N/cm.Type: ApplicationFiled: November 13, 2018Publication date: June 18, 2020Applicant: Asahi Kasei Kabushiki KaishaInventors: Kazuteru Umetsu, Keita Kusuzaka, Yuichiro Hirakawa, Nobuhiro Okada