Patents by Inventor Yasuhiko Ohsawa
Yasuhiko Ohsawa 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: 10276858Abstract: The present invention aims to provide an electrode for lithium ion batteries which exhibits excellent electrical conductivity even if its thickness is large. The electrode for lithium ion batteries of the present invention includes a first main surface to be located adjacent to a separator of a lithium ion battery and a second main surface to be located adjacent to a current collector of the lithium ion battery. The electrode has a thickness of 150 to 5000 ?m. The electrode contains, between the first main surface and the second main surface, a conductive member (A) made of an electronically conductive material and a large number of active material particles (B). At least part of the conductive member (A) forms a conductive path that electrically connects the first main surface to the second main surface. The conductive path is in contact with the active material particles (B) around the conductive path.Type: GrantFiled: December 12, 2014Date of Patent: April 30, 2019Assignees: SANYO CHEMICAL LTD., NISSAN MOTOR CO., LTD.Inventors: Yusuke Mizuno, Yasuhiro Shindo, Yasuhiro Tsudo, Kenichi Kawakita, Yuki Kusachi, Yasuhiko Ohsawa, Hajime Satou, Hiroshi Akama, Hideaki Horie
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Patent number: 10256473Abstract: To provide a means for improving durability of a positive electrode for a lithium battery (in particular, a resin current collector for forming the positive electrode). The means is achieved by a positive electrode for a lithium battery having a resin current collector containing a polyolefin-based resin matrix and a conductive filler, and a positive electrode active material layer provided on the resin current collector, characterized in that an electron conductive layer is disposed on the surface of the resin current collector that is in contact with the positive electrode active material layer.Type: GrantFiled: March 25, 2016Date of Patent: April 9, 2019Assignee: NISSAN MOTOR CO., LTD.Inventors: Yasuhiko Ohsawa, Hajime Satou, Hiroshi Akama, Hideaki Horie, Yusuke Mizuno, Hiroshi Fukumoto, Masatoshi Okura, Yasuhiro Shindo, Yasuhiro Tsudo
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Patent number: 10236478Abstract: Provided is a method for producing a lithium ion cell having an outer container composed of a resin molded article, and the method for producing a lithium ion cell includes a current collector forming process of forming, on the inner side of an outer container, each of a first electrode current collector and a second electrode current collector composed of an electrically conductive polymer composition by using a molding die.Type: GrantFiled: February 7, 2017Date of Patent: March 19, 2019Assignee: SANYO CHEMICAL INDUSTRIES, LTD.Inventors: Yasuhiro Shindo, Yusuke Mizuno, Kenichi Kawakita, Yasuhiko Ohsawa, Yuki Kusachi, Hajime Satou, Hiroshi Akama, Hideaki Horie
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Publication number: 20190067680Abstract: To provide an electrode for a lithium ion secondary battery capable of enhancing a charge and discharge cycle durability of an electrode that uses a resin current collector. An electrode for a lithium ion secondary battery provided with a resin current collector including a polyolefin resin matrix and a conductive filler A, and an electrode active material layer provided on the resin current collector, in which a crosslinked resin thin-film layer, which contains an Ni filler as a conductive filler B that does not alloy with Li and which has impermeability to the electrolyte solution, is arranged between the resin current collector and a negative electrode active material layer.Type: ApplicationFiled: February 14, 2017Publication date: February 28, 2019Applicant: NISSAN MOTOR CO., LTD.Inventors: Yasuhiko OHSAWA, Yuki KUSACHI, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE, Naofumi SHOJI, Masatoshi OKURA
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Patent number: 10211462Abstract: Provided is a lithium ion cell having a power generation part provided with a single cell obtained by stacking a positive electrode current collector, a positive electrode active material layer, a separator, a negative electrode active material layer, and a negative electrode current collector in the order, and an exterior cell container for accommodating the power generation part, in which the positive electrode active material layer is a non-bound material of a positive electrode active material particle, the negative electrode active material layer is a non-bound material of a negative electrode active material particle, and the single cell has flexibility.Type: GrantFiled: February 7, 2017Date of Patent: February 19, 2019Assignee: SANYO CHEMICAL INDUSTRIES, LTD.Inventors: Yasuhiro Shindo, Yusuke Mizuno, Kenichi Kawakita, Yasuhiko Ohsawa, Yuki Kusachi, Hajime Satou, Hiroshi Akama, Hideaki Horie
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Publication number: 20190020032Abstract: An object of the present invention is to provide a resin for coating an active material for lithium ion batteries which can prevent expansion of the electrode without inhibiting conduction of lithium ions. The resin for coating an active material for lithium ion batteries according to the present invention has a liquid absorbing rate of 10% or more when the resin is immersed in an electrolyte solution, and a tensile elongation at break of 10% or more when the resin is saturated with the electrolyte solution.Type: ApplicationFiled: September 20, 2018Publication date: January 17, 2019Applicants: SANYO CHEMICAL INDUSTRIES, LTD., NISSAN MOTOR CO., LTD.Inventors: Yusuke MIZUNO, Yasuhiro SHINDO, Yasuhiro TSUDO, Kenichi KAWAKITA, Yuta MURAKAMI, Yuki KUSACHI, Yasuhiko OHSAWA, Hiroshi AKAMA, Hideaki HORIE
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Patent number: 10122231Abstract: Each of permanent magnets includes a magnet body formed across the radial direction of a rotor core, and a pair of magnet end parts bending toward the outer peripheral side of the magnet body and extending respectively from both ends of the magnet body in the peripheral direction toward the outer edge of the rotor core. Magnetization directions of the magnet end parts and a magnetic pole center line intersect with each other on the outer peripheral side of the magnet body. The inclination angle of each magnetization direction of the magnet end parts with respect to the magnetic pole center line is greater than the inclination angle of a magnetization direction of the magnet body with respect to the magnetic pole center line.Type: GrantFiled: September 30, 2013Date of Patent: November 6, 2018Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Nobuyuki Kifuji, Yoshiki Yasuda, Yoshinari Asano, Yasuhiko Ohsawa
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Publication number: 20180316018Abstract: The present invention provides an electrode capable of reducing contact resistance between a resin current collector and the electrode, and a method of manufacturing the electrode. The electrode of the present invention includes a positive electrode current collector 11 containing a polymer material and a conductive filler, a positive electrode active material layer 13 disposed adjacent to the positive electrode current collector, and a concavoconvex shape 11c corresponding to a concavoconvex shape 13c formed on a surface of the positive electrode active material layer that is in contact with the positive electrode current collector, the concavoconvex shape being formed on a surface of the positive electrode current collector that is in contact with the positive electrode active material layer.Type: ApplicationFiled: September 21, 2016Publication date: November 1, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Yasuhiko OHSAWA, Hajime SATOU, Yuki KUSACHI, Hiroshi AKAMA, Hideaki HORIE, Masatoshi OKURA
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Publication number: 20180301691Abstract: The present invention aims to provide an electrode for lithium ion batteries which exhibits excellent electrical conductivity even if its thickness is large. The electrode for lithium ion batteries of the present invention includes a first main surface to be located adjacent to a separator of a lithium ion battery and a second main surface to be located adjacent to a current collector of the lithium ion battery. The electrode has a thickness of 150 to 5000 ?m. The electrode contains, between the first main surface and the second main surface, a conductive member (A) made of an electronically conductive material and a large number of active material particles (B). At least part of the conductive member (A) forms a conductive path that electrically connects the first main surface to the second main surface. The conductive path is in contact with the active material particles (B) around the conductive path.Type: ApplicationFiled: April 12, 2018Publication date: October 18, 2018Inventors: Yusuke MIZUNO, Yasuhiro SHINDO, Yasuhiro TSUDO, Kenichi KAWAKITA, Yuki KUSACHI, Yasuhiko OHSAWA, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE
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Publication number: 20180226654Abstract: The present invention provides a means for improving the output performance of a battery. An electrical connection structure of the present invention includes a current collector which includes a conductive resin layer containing a polymer material and a conductive filler and a conductive member which is in electrical contact with the conductive filler.Type: ApplicationFiled: August 21, 2015Publication date: August 9, 2018Applicants: NISSAN MOTOR CO., LTD.2,, SANYO CHEMICAL INDUSTRIES, LTD.Inventors: Yasuhiko OHSAWA, Haijime SATOU, Hiroshi AKAMA, Hideaki HORIE, Yusuke MIZUNO, Hiroshi FUKUMOTO, Masatoshi OKURA, Yasuhiro SHINDO, Yasuhiro TSUDO
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Patent number: 9941511Abstract: A core-shell-type electrode material is used as an electrode active material layer of a non-aqueous electrolyte secondary battery, the core-shell-type electrode material having a core part in which at least a part of a surface of an electrode active material is coated with a first conductive material and a shell part in which a second conductive material is contained in a base material formed by a gel-forming polymer having a tensile elongation at break of 10% or more in a gel state.Type: GrantFiled: October 3, 2014Date of Patent: April 10, 2018Assignee: Nissan Motor Co., Ltd.Inventors: Yasuhiko Ohsawa, Hideaki Horie, Hiroshi Akama, Yuki Kusachi, Yuta Murakami, Kenichi Kawakita, Yusuke Mizuno, Yasuhiro Tsudo, Yasuhiro Shindo
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Patent number: 9941512Abstract: A core-shell-type electrode material is used as an electrode active material layer of a non-aqueous electrolyte secondary battery, the core-shell-type electrode material having a core part including an electrode active material and a shell part in which a conductive material is contained in a base material formed by a gel-forming polymer having a tensile elongation at break of 10% or more in a gel state.Type: GrantFiled: October 3, 2014Date of Patent: April 10, 2018Assignee: Nissan Motor Co., Ltd.Inventors: Yasuhiko Ohsawa, Hideaki Horie, Hiroshi Akama, Yuki Kusachi, Yuta Murakami, Kenichi Kawakita, Yusuke Mizuno, Yasuhiro Tsudo, Yasuhiro Shindo
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Publication number: 20180090766Abstract: To provide a means for improving durability of a positive electrode for a lithium battery (in particular, a resin current collector for forming the positive electrode). The means is achieved by a positive electrode for a lithium battery having a resin current collector containing a polyolefin-based resin matrix and a conductive filler, and a positive electrode active material layer provided on the resin current collector, characterized in that an electron conductive layer is disposed on the surface of the resin current collector that is in contact with the positive electrode active material layer.Type: ApplicationFiled: March 25, 2016Publication date: March 29, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Yasuhiko OHSAWA, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE, Yusuke MIZUNO, Hiroshi FUKUMOTO, Masatoshi OKURA, Yasuhiro SHINDO, Yasuhiro TSUDO
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Publication number: 20180090762Abstract: The objective of the present invention is to provide an electrode for a lithium ion battery which has excellent electron conductivity even when the thickness of the electrode is increased. The electrode for a lithium ion battery according to the present invention includes a first principal surface located on a separator side of the lithium ion battery, and a second principal surface located on a current collector side, wherein the electrode has a thickness of 50 to 5000 ?m, and the electrode includes, between the first principal surface and the second principal surface, short fibers (A) having an average fiber length of 50 nm or more and less than 100 ?m, long fibers (B) having an average fiber length of 100 ?m or more and 1000 ?m or less, and active material particles (C), and the short fibers (A) and the long fibers (B) are electroconductive fibers.Type: ApplicationFiled: March 3, 2016Publication date: March 29, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Yusuke MIZUNO, Yasuhiro SHINDO, Yusuke NAKASHIMA, Kenichi KAWAKITA, Yuki KUSACHI, Yasuhiko OHSAWA, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE
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Publication number: 20180048023Abstract: To provide a structure which allows production of an electrode, even if the film thickness of an electrode is increased; and a non-aqueous electrolyte secondary battery using the same.Type: ApplicationFiled: December 25, 2015Publication date: February 15, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Yasuhiko OHSAWA, Yuki KUSACHI, Hiroshi AKAMA, Hideaki HORIE, Yusuke MIZUNO, Kenichi KAWAKITA, Yasuhiro SHINDO, Yasuhiro TSUDO
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Publication number: 20170279125Abstract: The present invention provides a means for improving the durability of a battery. An electrode of the present invention comprises a current collector having a conductive resin layer comprising a polymer material and a conductive filler, and an active material layer, and the electrode further includes a conductive member, which is in electrical contact with the conductive filler, between the current collector and the active material layer.Type: ApplicationFiled: August 21, 2015Publication date: September 28, 2017Applicant: NISSAN MOTOR CO., LTD.Inventors: Yasuhiko OHSAWA, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE, Yusuke MIZUNO, Hiroshi FUKUMOTO, Masatoshi OKURA, Yasuhiro SHINDO, Yasuhiro TSUDO
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Publication number: 20170279113Abstract: The present invention relates to a laminate type battery including: a power generating element formed by electrically laminating in series a plurality of single battery layers in which the single battery layer is formed by sequentially laminating a positive electrode current collector, a positive electrode active material layer, an electrolyte layer, a negative electrode active material layer, and a negative electrode current collector; and an outer casing body inside which the power generating element is disposed, in which at least one of the positive electrode current collector and the negative electrode current collector includes a resin layer having conductivity, and the power generating element further includes a resistance reduction layer adjacent to the resin layer at the outer surface side of the single battery layer including the resin layer.Type: ApplicationFiled: August 21, 2015Publication date: September 28, 2017Applicant: NISSAN MOTOR CO., LTD.Inventors: Yasuhiko OHSAWA, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE, Yusuke MIZUNO, Hiroshi FUKUMOTO, Masatoshi OKURA, Yasuhiro SHINDO, Yasuhiro TSUDO
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Patent number: 9755280Abstract: A control device of a secondary battery uses, as material of a positive electrode, positive electrode active material that shows a difference of an open circuit voltage curve between charging and discharging. A storing unit stores, as discharge open circuit voltage information, a relationship between an SOC in a discharge process and an open circuit voltage for each changeover SOC that is an SOC when changing a state of the secondary battery from the charge to the discharge. An SOC calculating unit calculates the SOC of the secondary battery in the discharge process on the basis of a changeover SOC when actually performing the change from the charge to the discharge and the discharge open circuit voltage information stored in the storing unit. It is therefore possible to properly detect the SOC during the discharge.Type: GrantFiled: October 24, 2012Date of Patent: September 5, 2017Assignee: Nissan Motor Co., Ltd.Inventors: Tomohiro Kaburagi, Yasuhiko Ohsawa, Atsushi Itou, Takuya Kinoshita
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Publication number: 20170237046Abstract: Provided is a method for producing a lithium ion cell having an outer container composed of a resin molded article, and the method for producing a lithium ion cell includes a current collector forming process of forming, on the inner side of an outer container, each of a first electrode current collector and a second electrode current collector composed of an electrically conductive polymer composition by using a molding die.Type: ApplicationFiled: February 7, 2017Publication date: August 17, 2017Applicant: SANYO CHEMICAL INDUSTRIES, LTD.Inventors: Yasuhiro SHINDO, Yusuke MIZUNO, Kenichi KAWAKITA, Yasuhiko OHSAWA, Yuki KUSACHI, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE
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Publication number: 20170237116Abstract: Provided is a lithium ion cell having a power generation part provided with a single cell obtained by stacking a positive electrode current collector, a positive electrode active material layer, a separator, a negative electrode active material layer, and a negative electrode current collector in the order, and an exterior cell container for accommodating the power generation part, in which the positive electrode active material layer is a non-bound material of a positive electrode active material particle, the negative electrode active material layer is a non-bound material of a negative electrode active material particle, and the single cell has flexibility.Type: ApplicationFiled: February 7, 2017Publication date: August 17, 2017Applicant: SANYO CHEMICAL INDUSTRIES, LTD.Inventors: Yasuhiro SHINDO, Yusuke MIZUNO, Kenichi KAWAKITA, Yasuhiko OHSAWA, Yuki KUSACHI, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE