Patents by Inventor Masakazu Seki
Masakazu Seki 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: 10916357Abstract: An object of the present invention is to provide an aluminum alloy foil for an electrode current collector and a manufacturing method thereof, the foil having a high strength and high strength after a drying process after the application of the active material while keeping a high electrical conductivity. Disclosed is a method for manufacturing an aluminum alloy foil for electrode current collector, including: forming by continuous casting an aluminum alloy sheet containing 0.03 to 1.0% of Fe, 0.01 to 0.2% of Si, 0.0001 to 0.2% of Cu, with the rest being Al and unavoidable impurities, performing cold rolling to the aluminum alloy sheet at a cold rolling reduction of 80% or lower, and performing heat treatment at 550 to 620° C. for 1 to 15 hours.Type: GrantFiled: July 29, 2011Date of Patent: February 9, 2021Assignee: UACJ CorporationInventors: Masakazu Seki, Satoshi Suzuki, Kenji Yamamoto, Tomohiko Furutani
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Patent number: 10367204Abstract: It is an object to provide an aluminum alloy foil for an electrode current collector, the foil having a high post-drying strength after application of an active material while keeping a high electrical conductivity. Disclosed is an aluminum alloy foil for an electrode current collector, comprising 0.03 to 0.1 mass % (hereinafter, “mass %” is simply referred to as “%”) of Fe, 0.01 to 0.1% of Si, and 0.0001 to 0.01% of Cu, with the rest consisting of Al and unavoidable impurities, wherein the aluminum alloy foil after final cold rolling has a tensile strength of 180 MPa or higher, a 0.2% yield strength of 160 MPa or higher, and an electrical conductivity of 60% IACS or higher; and the aluminum alloy foil has a tensile strength of 170 MPa or higher and a 0.2% yield strength of 150 MPa or higher even after the aluminum alloy foil is subjected to heat treatment at any of 120° C. for 24 hours, 140° C. for 3 hours, and 160° C. for 15 minutes.Type: GrantFiled: December 12, 2011Date of Patent: July 30, 2019Assignees: UACJ Corporation, UACJ Foil CorporationInventors: Masakazu Seki, Satoshi Suzuki, Tomohiko Furutani, Kenji Yamamoto, Koichi Ashizawa
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Patent number: 10050257Abstract: An aluminum alloy foil for an electrode current collectors has a high post-drying strength after application of an active material while keeping a high electrical conductivity. The aluminum alloy foil includes 0.1 to 1.0 mass % of Fe, 0.01 to 0.5% of Si, and 0.01 to 0.2 mass % of Cu, and the rest includes Al and unavoidable impurities. The aluminum alloy foil after final cold rolling has a tensile strength of 220 MPa or higher, a 0.2% yield strength of 180 MPa or higher, and an electrical conductivity of 58% IACS or higher. The aluminum alloy foil has a tensile strength of 190 MPa or higher and a 0.2% yield strength of 160 MPa or higher after the aluminum alloy foil is heat treated at any of 120° C. for 24 hours, 140° C. for 3 hours, and 160° C. for 15 minutes.Type: GrantFiled: December 12, 2011Date of Patent: August 14, 2018Assignees: UACJ CORPORATION, UACJ FOIL CORPORATIONInventors: Masakazu Seki, Satoshi Suzuki, Tomohiko Furutani, Kenji Yamamoto, Koichi Ashizawa
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Patent number: 9947917Abstract: An aluminum alloy foil for a current collector of an electrode is provided which has not only high electric conductivity but also high strength before and after a drying step, and is low in manufacturing cost. Provided is an aluminum alloy foil for a current collector of an electrode, containing 1.0 to 2.0 mass % (hereafter, simply referred to as “%”) of Fe, 0.01 to 0.2% of Si, 0.0001 to 0.2% of Cu, and 0.005 to 0.3% of Ti, the remainder being Al and inevitable impurities, wherein an amount of Fe contained as a solid solution is 300 ppm or more, and particles of intermetallic compounds having an equivalent circle diameter of 0.1 to 1.0 ?m exist at 1.0×105 particles/mm2 or more.Type: GrantFiled: October 21, 2014Date of Patent: April 17, 2018Assignees: UACJ Corporation, UACJ Foil CorporationInventors: Masakazu Seki, Satoshi Suzuki, Tomohiko Furutani
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Patent number: 9847530Abstract: An object of the present invention is to provide an aluminum alloy foil for an electrode current collector, the foil having a high strength and high strength after a drying process. The aluminum alloy foil can be manufactured at low cost. Disclosed is an aluminum alloy foil for electrode current collector, including 0.03 to 1.0% of Fe, 0.01 to 0.2% of Si, 0.0001 to 0.2% of Cu, 0.005 to 0.03% of Ti, with the rest being Al and unavoidable impurities. The aluminum alloy foil has Fe solid solution content of 200 ppm or higher, and an intermetallic compound having a maximum diameter length of 0.1 to 1.0 ?m in an number density of 2.0×104 particles/mm2 or more.Type: GrantFiled: July 29, 2011Date of Patent: December 19, 2017Assignees: UACJ CORPORATION, UACJ FOIL CORPORATIONInventors: Masakazu Seki, Satoshi Suzuki, Kenji Yamamoto, Tomohiko Furutani
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Patent number: 9825300Abstract: The present invention provides an aluminum alloy foil, capable of going under thin rolling during its manufacture. The aluminum alloy foil shall also avoid cuts during the active material paste coating process and wrinkles during the press working process, and have suitable strength for the series of manufacturing processes from the manufacture of the aluminum alloy foil to the manufacture of the electrode material. Further, the present invention provides an aluminum alloy foil for electrode current collector, including 0.50 to 1.50 mass % (hereinafter mass % is referred to as %) of Mn, 0.05 to 0.50% of Cu, 0.20 to 1.00% of Fe, 0.01 to 0.60% of Si, with the rest consisting of Al and unavoidable impurities, a manufacturing method thereof, and an electrode material. Here, regarding the aluminum alloy foil, a solid solution amount of Mn is 1500 ppm or more, a solid solution amount of Cu is 40 ppm or more, and a tensile strength after a final cold rolling (T1) is 260 MPa or higher and 350 MPa or lower.Type: GrantFiled: May 16, 2013Date of Patent: November 21, 2017Assignees: UACJ CORPORATION, UACJ FOIL CORPORATIONInventors: Tomohiko Furutani, Kenji Yamamoto, Satoshi Suzuki, Masakazu Seki
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Patent number: 9732402Abstract: An aluminum alloy foil having superior formability is provided. An aluminum alloy foil, including 0.8 to 2.0 mass % of Fe, 0.05 to 0.2 mass % of Si, and 0.0025 to 0.5 mass % of Cu, with the rest consisting of Al and unavoidable impurities, wherein the aluminum alloy foil has an average crystal grain size of 20 ?m or less, and a number of intermetallic compounds existing in the aluminum alloy foil, the intermetallic compounds having a circle equivalent diameter of 1.0 to 5.0 ?m, is 1.0×104 grains/mm2 or more, is provided.Type: GrantFiled: July 24, 2013Date of Patent: August 15, 2017Assignee: UACJ CORPORATIONInventors: Masakazu Seki, Satoshi Suzuki
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Patent number: 9715971Abstract: An object of the present invention is to provide an aluminum alloy foil for electrode current collectors having superior rolling properties, high conductivity, and high strength after the drying step following the application of the active material. According to the present invention, an aluminum alloy foil for electrode current collector, including 0.03 to 0.1% of Fe, 0.005 to 0.02% of Ti, 0 to 0.1% of Si, 0 to 0.01% of Cu, 99.85% or more of Al, with the rest being unavoidable impurities, wherein tensile strength of the aluminum alloy foil is 175 MPa or higher, and electrical conductivity of the aluminum alloy foil is 60% IACS or higher, is provided.Type: GrantFiled: February 20, 2013Date of Patent: July 25, 2017Assignees: UACJ CORPORATION, UACJ FOIL CORPORATIONInventors: Satoshi Suzuki, Masakazu Seki, Tomohiko Furutani, Kenji Yamamoto
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Patent number: 9698426Abstract: The present invention provides an aluminum alloy foil for electrode current collector, high in strength and superior in heat resistance after the active material coating/drying process of the manufacture of the battery, a manufacturing method thereof, and a lithium ion secondary battery. According to the present invention, an aluminum alloy foil for electrode current collector, including 0.1 to 0.5 mass % (hereinafter mass % is referred to as %) of Fe, 0.01 to 0.5% of Si, 0.01 to 0.2% of Cu, 0.01 to 0.5% of Mn, with the rest being Al and unavoidable impurities, wherein tensile strength of an aluminum alloy foil and a heat treatment selected from 24 hours at 100° C., 3 hours at 150° C., and 15 minutes at 200° C., is 210 MPa or higher, a manufacturing method thereof, and a lithium ion secondary battery are provided.Type: GrantFiled: April 19, 2013Date of Patent: July 4, 2017Assignees: UACJ CORPORATION, UACJ FOIL CORPORATIONInventors: Tomohiko Furutani, Kenji Yamamoto, Satoshi Suzuki, Masakazu Seki
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Patent number: 9666867Abstract: An object of the present invention is to provide an aluminum alloy foil for an electrode current collector, the foil having a high strength after the drying step while keeping a high electrical conductivity. Disclosed is a method for manufacturing an aluminum alloy foil for electrode current collector, including: maintaining an aluminum alloy ingot comprising 0.03 to 0.1% of Fe, 0.01 to 0.1% of Si, 0.0001 to 0.01% of Cu, 0.005% or less of Mn, with the rest being Al and unavoidable impurities, at 550 to 620° C. for 1 to 20 hours, and subjecting the resulting ingot under a hot rolling with a starting temperature of 500° C. or higher and an end-point temperature of 255 to 300° C.Type: GrantFiled: July 29, 2011Date of Patent: May 30, 2017Assignees: UACJ CORPORATION, UACJ FOIL CORPORATIONInventors: Masakazu Seki, Satoshi Suzuki, Kenji Yamamoto, Tomohiko Furutani
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Publication number: 20170040617Abstract: It is an object to provide an aluminum alloy foil for an electrode current collector, the foil having a high post-drying strength after application of an active material while keeping a high electrical conductivity. Disclosed is an aluminum alloy foil for an electrode current collector, comprising 0.03 to 0.1 mass % (hereinafter, “mass %” is simply referred to as “%”) of Fe, 0.01 to 0.1% of Si, and 0.0001 to 0.01% of Cu, with the rest consisting of Al and unavoidable impurities, wherein the aluminum alloy foil after final cold rolling has a tensile strength of 180 MPa or higher, a 0.2% yield strength of 160 MPa or higher, and an electrical conductivity of 60% IACS or higher; and the aluminum alloy foil has a tensile strength of 170 MPa or higher and a 0.2% yield strength of 150 MPa or higher even after the aluminum alloy foil is subjected to heat treatment at any of 120° C. for 24 hours, 140° C. for 3 hours, and 160° C. for 15 minutes.Type: ApplicationFiled: October 21, 2016Publication date: February 9, 2017Applicants: UACJ Corporation, UACJ Foil CorporationInventors: Masakazu Seki, Satoshi Suzuki, Tomohiko Furutani, Kenji Yamamoto, Koichi Ashizawa
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Patent number: 9543588Abstract: An object of the present invention is to provide an aluminum alloy foil for an electrode current collector, the foil having a high strength after the drying step while keeping a high electrical conductivity. Disclosed is a method for manufacturing an aluminum alloy foil for electrode current collector, including: maintaining an aluminum alloy ingot comprising 0.1 to 0.5% of Fe, 0.01 to 0.3% of Si, 0.01 to 0.2% of Cu, 0.01% or less of Mn, with the rest being Al and unavoidable impurities, at 550 to 620° C. for 1 to 20 hours, and subjecting the resulting ingot under a hot rolling with a starting temperature of 500° C. or higher and an end-point temperature of 255 to 300° C.Type: GrantFiled: July 29, 2011Date of Patent: January 10, 2017Assignees: UACJ Corporation, UACJ Foil CorporationInventors: Masakazu Seki, Satoshi Suzuki, Kenji Yamamoto, Tomohiko Furutani
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Publication number: 20160276653Abstract: An aluminum alloy foil for a current collector of an electrode is provided which has not only high electric conductivity but also high strength before and after a drying step, and is low in manufacturing cost. Provided is an aluminum alloy foil for a current collector of an electrode, containing 1.0 to 2.0 mass % (hereafter, simply referred to as “%”) of Fe, 0.01 to 0.2% of Si, 0.0001 to 0.2% of Cu, and 0.005 to 0.3% of Ti, the remainder being Al and inevitable impurities, wherein an amount of Fe contained as a solid solution is 300 ppm or more, and particles of intermetallic compounds having an equivalent circle diameter of 0.1 to 1.0 ?m exist at 1.0×105 particles/mm2 or more.Type: ApplicationFiled: October 21, 2014Publication date: September 22, 2016Applicants: UACJ Corporation, UACJ Foil CorporationInventors: Masakazu Seki, Satoshi Suzuki, Tomohiko Furutani
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Publication number: 20150248973Abstract: An object of the present invention is to provide an aluminum alloy foil for electrode current collectors having superior rolling properties, high conductivity, and high strength after the drying step following the application of the active material. According to the present invention, an aluminum alloy foil for electrode current collector, including 0.03 to 0.1% of Fe, 0.005 to 0.02% of Ti, 0 to 0.1% of Si, 0 to 0.01% of Cu, 99.85% or more of Al, with the rest being unavoidable impurities, wherein tensile strength of the aluminum alloy foil is 175 MPa or higher, and electrical conductivity of the aluminum alloy foil is 60% IACS or higher, is provided.Type: ApplicationFiled: February 20, 2013Publication date: September 3, 2015Applicants: UACJ FOIL CORPORATION, UACJ CORPORATIONInventors: Satoshi Suzuki, Masakazu Seki, Tomohiko Furutani, Kenji Yamamoto
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Publication number: 20150203941Abstract: An aluminum alloy foil having superior formability is provided. An aluminum alloy foil, including 0.8 to 2.0 mass % of Fe, 0.05 to 0.2 mass % of Si, and 0.0025 to 0.5 mass % of Cu, with the rest consisting of Al and unavoidable impurities, wherein the aluminum alloy foil has an average crystal grain size of 20 ?m or less, and a number of intermetallic compounds existing in the aluminum alloy foil, the intermetallic compounds having a circle equivalent diameter of 1.0 to 5.0 ?m, is 1.0×104 grains/mm2 or more, is provided.Type: ApplicationFiled: July 24, 2013Publication date: July 23, 2015Applicant: UACJ CorporationInventors: Masakazu Seki, Satoshi Suzuki
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Publication number: 20150188145Abstract: The present invention provides an aluminum alloy foil, capable of going under thin rolling during its manufacture. The aluminum alloy foil shall also avoid cuts during the active material paste coating process and wrinkles during the press working process, and have suitable strength for the series of manufacturing processes from the manufacture of the aluminum alloy foil to the manufacture of the electrode material. Further, the present invention provides an aluminum alloy foil for electrode current collector, including 0.50 to 1.50 mass % (hereinafter mass % is referred to as %) of Mn, 0.05 to 0.50% of Cu, 0.20 to 1.00% of Fe, 0.01 to 0.60% of Si, with the rest consisting of Al and unavoidable impurities, a manufacturing method thereof, and an electrode material. Here, regarding the aluminum alloy foil, a solid solution amount of Mn is 1500 ppm or more, a solid solution amount of Cu is 40 ppm or more, and a tensile strength after a final cold rolling (T1) is 260 MPa or higher and 350 MPa or lower.Type: ApplicationFiled: May 16, 2013Publication date: July 2, 2015Applicants: UACJ FOIL CORPORATION, UACJ CORPORATIONInventors: Tomohiko Furutani, Kenji Yamamoto, Satoshi Suzuki, Masakazu Seki
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Publication number: 20150132657Abstract: The present invention provides an aluminum alloy foil for electrode current collector, high in strength and superior in heat resistance after the active material coating/drying process of the manufacture of the battery, a manufacturing method thereof, and a lithium ion secondary battery. According to the present invention, an aluminum alloy foil for electrode current collector, including 0.1 to 0.5 mass % (hereinafter mass % is referred to as %) of Fe, 0.01 to 0.5% of Si, 0.01 to 0.2% of Cu, 0.01 to 0.5% of Mn, with the rest being Al and unavoidable impurities, wherein tensile strength of an aluminum alloy foil and a heat treatment selected from 24 hours at 100° C., 3 hours at 150° C., and 15 minutes at 200° C., is 210 MPa or higher, a manufacturing method thereof, and a lithium ion secondary battery are provided.Type: ApplicationFiled: April 19, 2013Publication date: May 14, 2015Inventors: Tomohiko Furutani, Kenji Yamamoto, Satoshi Suzuki, Masakazu Seki
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Publication number: 20140261908Abstract: An object of the present invention is to provide an aluminum alloy foil for an electrode current collector and a manufacturing method thereof, the foil having a high strength and high strength after a drying process after the application of the active material while keeping a high electrical conductivity. Disclosed is a method for manufacturing an aluminum alloy foil for electrode current collector, including: forming by continuous casting an aluminum alloy sheet containing 0.03 to 1.0% of Fe, 0.01 to 0.2% of Si, 0.0001 to 0.2% of Cu, with the rest being Al and unavoidable impurities, performing cold rolling to the aluminum alloy sheet at a cold rolling reduction of 80% or lower, and performing heat treatment at 550 to 620° C. for 1 to 15 hours.Type: ApplicationFiled: July 29, 2011Publication date: September 18, 2014Applicants: UACJ FOIL CORPORATION, UACJ CORPORATIONInventors: Masakazu Seki, Satoshi Suzuki, Kenji Yamamoto, Tomohiko Furutani
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Publication number: 20140205900Abstract: An object of the present invention is to provide an aluminum alloy foil for an electrode current collector, the foil having a high strength and high strength after a drying process. The aluminum alloy foil can be manufactured at low cost. Disclosed is an aluminum alloy foil for electrode current collector, including 0.03 to 1.0% of Fe, 0.01 to 0.2% of Si, 0.0001 to 0.2% of Cu, 0.005 to 0.03% of Ti, with the rest being Al and unavoidable impurities. The aluminum alloy foil has Fe solid solution content of 200 ppm or higher, and an intermetallic compound having a maximum diameter length of 0.1 to 1.0 ?m in an number density of 2.0×104 particles/mm2 or more.Type: ApplicationFiled: July 29, 2011Publication date: July 24, 2014Applicants: UACJ FOIL CORPORATION, UACJ CORPORATIONInventors: Masakazu Seki, Satoshi Suzuki, Kenji Yamamoto, Tomohiko Furutani
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Publication number: 20140178709Abstract: An object of the present invention is to provide an aluminum alloy foil for an electrode current collector, the foil having a high strength after the drying step while keeping a high electrical conductivity. Disclosed is a method for manufacturing an aluminum alloy foil for electrode current collector, including: maintaining an aluminum alloy ingot comprising 0.1 to 0.5% of Fe, 0.01 to 0.3% of Si, 0.01 to 0.2% of Cu, 0.01% or less of Mn, with the rest being Al and unavoidable impurities, at 550 to 620° C. for 1 to 20 hours, and subjecting the resulting ingot under a hot rolling with a starting temperature of 500° C. or higher and an end-point temperature of 255 to 300° C.Type: ApplicationFiled: July 29, 2011Publication date: June 26, 2014Applicants: UACJ FOIL CORPORATION, UACJ CorporationInventors: Masakazu Seki, Satoshi Suzuki, Kenji Yamamoto, Tomohiko Furutani