Patents by Inventor Masao Fukunaga
Masao Fukunaga 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: 20230170594Abstract: A method of manufacturing battery including an electrode assembly having a positive electrode, a negative electrode, and a separator arranged between the positive electrode and the negative electrode, and a battery case configured to accommodate the electrode assembly. The separator is provided with adhesion layers formed on both surfaces of the separator. The method comprising: an arranging step for arranging the electrode assembly, in which the positive electrode and the separator are adhered by the adhesion layer and the negative electrode and the separator are adhered by the adhesion layer, inside the battery case; a peeling step for peeling off at least one, among the positive electrode and the negative electrode, and the separator on the electrode assembly; and a liquid injection step for performing a liquid injection of an electrolyte solution into the battery case after the peeling step.Type: ApplicationFiled: November 29, 2022Publication date: June 1, 2023Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.Inventor: Masao FUKUNAGA
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Publication number: 20230170520Abstract: A herein disclosed manufacturing method of a secondary battery is a manufacturing method of a secondary battery that includes a wound electrode assembly and a battery case. The herein disclosed manufacturing method of the secondary battery comprising: an arranging step for arranging the plural wound electrode assemblies inside the battery case; a peeling step for peeling off at least one, among the positive electrode and the negative electrode, and the separator; and a liquid injection step for performing a liquid injection of the electrolyte solution into the battery case. At the peeling step, at least one, among the positive electrode and the negative electrode of each wound electrode assembly, and the separator are peeled off to make a state where a peeled area is formed on each of the plural wound electrode assemblies.Type: ApplicationFiled: November 29, 2022Publication date: June 1, 2023Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.Inventor: Masao FUKUNAGA
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Patent number: 11456487Abstract: Provided is a method for manufacturing a secondary battery including a stacked electrode body including a plurality of positive electrode plates (1) and a plurality of negative electrode plates, the positive electrode plates (1) each having a positive electrode active material layer (1b) formed on a positive electrode substrate (1a), a positive electrode substrate exposed portion where the positive electrode active material layer (1b) is not formed on the positive electrode substrate (1a) being provided as a positive electrode tab portion (1e) at the end of the positive electrode plate (1). The method includes a cutout forming step of providing a cutout in a region at the base of the positive electrode plate (1) where the active material layer (1b) is formed, and a compressing step of compressing the positive electrode active material layer (1b) after the cutout forming step.Type: GrantFiled: May 23, 2017Date of Patent: September 27, 2022Assignees: PANASONIC HOLDINGS CORPORATION, SANYO Electric Co., Ltd.Inventors: Masao Fukunaga, Mamoru Kuramoto
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Patent number: 10916760Abstract: A method of manufacturing a secondary battery including an electrode body having a positive electrode plate (40) having a positive electrode tab (4c), a negative electrode plate (5) having a negative electrode tab (5c), and a separator, in which the positive electrode tab (4c) is connected to a positive electrode collector in a curved state and the negative electrode tab (5c) is connected to a negative electrode collector in a curved state, and in which, as the positive electrode plate (4), one provided with a cutaway (4e) at a base of the positive electrode tab (4c) in a region where a positive electrode active material mixture layer (4a) is formed on a positive electrode core body is used.Type: GrantFiled: June 28, 2017Date of Patent: February 9, 2021Assignee: SANYO Electric Co., Ltd.Inventors: Masao Fukunaga, Ryoichi Wakimoto
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Publication number: 20200321658Abstract: Provided is a method for manufacturing a secondary battery including a stacked electrode body including a plurality of positive electrode plates (1) and a plurality of negative electrode plates, the positive electrode plates (1) each having a positive electrode active material layer (1b) formed on a positive electrode substrate (1a), a positive electrode substrate exposed portion where the positive electrode active material layer (1b) is not formed on the positive electrode substrate (1a) being provided as a positive electrode tab portion (1e) at the end of the positive electrode plate (1). The method includes a cutout forming step of providing a cutout in a region at the base of the positive electrode plate (1) where the active material layer (1b) is formed, and a compressing step of compressing the positive electrode active material layer (1b) after the cutout forming step.Type: ApplicationFiled: May 23, 2017Publication date: October 8, 2020Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.Inventors: Masao Fukunaga, Mamoru Kuramoto
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Patent number: 10673059Abstract: Disclosed is a method for manufacturing a positive electrode including a positive electrode substrate made of aluminum foil and a positive electrode active material layer containing a positive electrode active material on the positive electrode substrate. This method includes the steps of forming the positive electrode active material layer on the positive electrode substrate; forming a protective layer on the positive electrode substrate; stretching an exposed region of the positive electrode substrate after the steps of forming the active material layer and the protective layer; and compressing the positive electrode active material layer after the stretching step.Type: GrantFiled: October 28, 2016Date of Patent: June 2, 2020Assignee: SANYO Electric Co., Ltd.Inventors: Masao Fukunaga, Ryosuke Shirota, Kazuya Nishio, Haruya Nakai
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Patent number: 10553852Abstract: Disclosed is a method for manufacturing a positive electrode including a positive electrode substrate made of aluminum foil and a positive electrode active material layer containing a positive electrode active material on the positive electrode substrate. This method includes the steps of stretching a first exposed region of the positive electrode substrate with a first stretching roller disposed upstream; stretching a second exposed region of the positive electrode substrate with a second stretching roller disposed downstream; and compressing the positive electrode active material layer with a pair of compression rollers.Type: GrantFiled: October 28, 2016Date of Patent: February 4, 2020Assignee: SANYO Electric Co., Ltd.Inventors: Masao Fukunaga, Ryosuke Shirota, Kazuya Nishio, Haruya Nakai
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Publication number: 20190379027Abstract: A method of manufacturing a secondary battery including an electrode body having a positive electrode plate (40) having a positive electrode tab (4c), a negative electrode plate (5) having a negative electrode tab (5c), and a separator, in which the positive electrode tab (4c) is connected to a positive electrode collector in a curved state and the negative electrode tab (5c) is connected to a negative electrode collector in a curved state, and in which, as the positive electrode plate (4), one provided with a cutaway (4e) at a base of the positive electrode tab (4c) in a region where a positive electrode active material mixture layer (4a) is formed on a positive electrode core body is used.Type: ApplicationFiled: June 28, 2017Publication date: December 12, 2019Applicant: SANYO Electric Co., Ltd.Inventors: Masao FUKUNAGA, Ryoichi WAKIMOTO
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Publication number: 20190280287Abstract: A positive electrode plate including a positive electrode core and a positive electrode active material mixture layer formed on the positive electrode core is produced. The positive electrode plate includes a positive electrode exposed core portion at an end thereof. The positive electrode plate has a flat region in which the thickness of the positive electrode active material mixture layer is substantially uniform and an inclined portion in which the thickness of the positive electrode active material mixture layer gradually decreases from an end of the flat region toward the positive electrode exposed core portion. The positive electrode plate is cut such that a boundary between a main portion of the positive electrode plate and a positive electrode tab portion (40) is at the inclined portion. After that, the positive electrode active material mixture layer is compressed.Type: ApplicationFiled: July 24, 2017Publication date: September 12, 2019Applicant: SANYO Electric Co., Ltd.Inventors: Masao Fukunaga, Tetsuya Sato
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Publication number: 20170125791Abstract: Disclosed is a method for manufacturing a positive electrode including a positive electrode substrate made of aluminum foil and a positive electrode active material layer containing a positive electrode active material on the positive electrode substrate. This method includes the steps of forming the positive electrode active material layer on the positive electrode substrate; forming a protective layer on the positive electrode substrate; stretching an exposed region of the positive electrode substrate after the steps of forming the active material layer and the protective layer; and compressing the positive electrode active material layer after the stretching step.Type: ApplicationFiled: October 28, 2016Publication date: May 4, 2017Applicant: SANYO Electric Co., Ltd.Inventors: Masao Fukunaga, Ryosuke Shirota, Kazuya Nishio, Haruya Nakai
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Publication number: 20170125790Abstract: Disclosed is a method for manufacturing a positive electrode including a positive electrode substrate made of aluminum foil and a positive electrode active material layer containing a positive electrode active material on the positive electrode substrate. This method includes the steps of stretching a first exposed region of the positive electrode substrate with a first stretching roller disposed upstream; stretching a second exposed region of the positive electrode substrate with a second stretching roller disposed downstream; and compressing the positive electrode active material layer with a pair of compression rollers.Type: ApplicationFiled: October 28, 2016Publication date: May 4, 2017Applicant: SANYO Electric Co., Ltd.Inventors: Masao Fukunaga, Ryosuke Shirota, Kazuya Nishio, Haruya Nakai
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Patent number: 8277520Abstract: One aspect of the present invention pertains to a method for producing a negative electrode for a non-aqueous electrolyte secondary battery, which comprises a paste preparing step of kneading a mixture containing a negative electrode active material, a binder resin having a glass transition temperature within a range from 20 to 40° C. and a dispersion solvent to prepare a negative electrode material mixture paste, a paste applying step of applying the negative electrode material mixture paste controlled to a temperature which is at least 10° C. higher than the glass transition temperature of the binder resin on a current collector to form a coating film, a coating film drying step of drying the coating film to form a negative electrode precursor, and a rolling step of rolling the negative electrode precursor to prepare a negative electrode having a negative electrode material mixture layer.Type: GrantFiled: November 27, 2007Date of Patent: October 2, 2012Assignee: Panasonic CorporationInventors: Toshihiro Inoue, Masao Fukunaga, Takafumi Oura
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Patent number: 8142635Abstract: A capillary array includes a light detection portion, a sample supply portion, a buffer solution supply portion and a voltage application portion which are necessary functions for electrophoresis, thereby, when assembling the capillary array into an electrophoresis apparatus, the same can be immediately used. Accordingly, a capillary array is provided which can be easily incorporated into an electrophoresis apparatus.Type: GrantFiled: July 26, 2010Date of Patent: March 27, 2012Assignee: Hitachi, Ltd.Inventors: Yasushi Shimizu, Toshiaki Kita, Kiyoshi Tsukada, Akihiro Suzuki, Tomonari Morioka, Masaya Kojima, Ryoji Inaba, Daizo Tokinaga, Shuhei Yamamoto, Yoshiyuki Okishima, Masao Fukunaga, Takayasu Furukawa, Tomohiro Shoji
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Patent number: 7931983Abstract: A lithium ion secondary battery includes a positive electrode capable of absorbing and desorbing lithium ion, a negative electrode capable of absorbing and desorbing lithium ion, a porous film interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte: the porous film being adhered to a surface of at least one of the positive electrode and the negative electrode; the porous film including a filler and a resin binder; the resin binder content in the porous film being 1.5 to 8 parts by weight per 100 parts by weight of the filler; and the resin binder including an acrylonitrile unit, an acrylate unit, or a methacrylate unit.Type: GrantFiled: April 26, 2007Date of Patent: April 26, 2011Assignee: Panasonic CorporationInventors: Tsumoru Ohata, Junji Nakajima, Tetsuya Hayashi, Takashi Takano, Shigeo Ikuta, Kohei Suzuki, Kouji Nishida, Masao Fukunaga, Akiko Fujino
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Publication number: 20100288642Abstract: A capillary array includes a light detection portion, a sample supply portion, a buffer solution supply portion and a voltage application portion which are necessary functions for electrophoresis, thereby, when assembling the capillary array into an electrophoresis apparatus, the same can be immediately used. Accordingly, a capillary array is provided which can be easily incorporated into an electrophoresis apparatus.Type: ApplicationFiled: July 26, 2010Publication date: November 18, 2010Inventors: Yasushi Shimizu, Toshiaki Kita, Kiyoshi Tsukada, Akihiro Suzuki, Tomonari Morioka, Masaya Kojima, Ryoji Inaba, Daizo Tokinaga, Shuhei Yamamoto, Yoshiyuki Okishima, Masao Fukunaga, Takayasu Furukawa, Tomohiro Shoji
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Publication number: 20100227210Abstract: The present invention relates to a non-aqueous electrolyte secondary battery and a manufacturing method thereof. An object of the present invention is to obtain a non-aqueous electrolyte secondary battery that has an improved non-aqueous electrolyte impregnation ability into a flat wound electrode group that includes a porous insulating layer that contains inorganic oxide particles and a binder, little deterioration of charge/discharge cycle characteristics, high voltage discharge ability and favorable productivity. According to the present invention, in a non-aqueous electrolyte secondary battery 1 that includes a flat wound electrode group 2 and a battery case 9, the electrode group 2 including a positive electrode 5, a negative electrode 6, a separator 7 and a porous insulating layer 8, at least one crack is formed in the porous insulating layer 8 that lies at folded portions 2a of the electrode group 2.Type: ApplicationFiled: June 2, 2009Publication date: September 9, 2010Inventors: Masao Fukunaga, Hajime Nishino
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Patent number: 7785458Abstract: A capillary array includes a light detection portion, a sample supply portion, a buffer solution supply portion and a voltage application portion which are necessary functions for electrophoresis, thereby, when assembling the capillary array into an electrophoresis apparatus, the same can be immediately used. Accordingly, a capillary array is provided which can be easily incorporated into an electrophoresis apparatus.Type: GrantFiled: December 15, 2005Date of Patent: August 31, 2010Assignee: Hitachi, Ltd.Inventors: Yasushi Shimizu, Toshiaki Kita, Kiyoshi Tsukada, Akihiro Suzuki, Tomonari Morioka, Masaya Kojima, Ryoji Inaba, Daizo Tokinaga, Shuhei Yamamoto, Yoshiyuki Okishima, Masao Fukunaga, Takayasu Furukawa, Tomohiro Shoji
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Patent number: 7767339Abstract: A method for producing a non-aqueous electrolyte secondary battery comprising the steps of: (i) mixing a positive electrode active material, a first binder A and a dispersion medium to prepare a paste A, the active material comprising a lithium-containing transition metal oxide; (ii) mixing a conductive agent, a second binder B and a dispersion medium to prepare a paste B, the conductive agent comprising carbon black; (iii) mixing the paste A and the paste B to prepare a positive electrode material paste C; (iv) applying the positive electrode material paste C onto a positive electrode core member and rolling and drying the resultant member to prepare a positive electrode; and (v) fabricating a battery using the positive electrode, a negative electrode and a non-aqueous electrolyte, wherein contact angle ?A between the non-aqueous electrolyte and the binder A and contact angle ?B between the non-aqueous electrolyte and the binder B satisfy the formula (1): ?B??A?15°.Type: GrantFiled: May 9, 2005Date of Patent: August 3, 2010Assignee: Panasonic CorporationInventors: Kohei Suzuki, Masao Fukunaga, Toshihide Murata, Kazunori Kubota, Tsumoru Ohata
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Patent number: 7758998Abstract: A lithium ion secondary battery includes a positive electrode capable of absorbing and desorbing lithium ion, a negative electrode capable of absorbing and desorbing lithium ion, a porous film interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte: the porous film being adhered to a surface of at least one of the positive electrode and the negative electrode; the porous film including a filler and a resin binder; the resin binder content in the porous film being 1.5 to 8 parts by weight per 100 parts by weight of the filler; and the resin binder including an acrylonitrile unit, an acrylate unit, or a methacrylate unit.Type: GrantFiled: April 26, 2007Date of Patent: July 20, 2010Assignee: Panasonic CorporationInventors: Tsumoru Ohata, Junji Nakajima, Tetsuya Hayashi, Takashi Takano, Shigeo Ikuta, Kohei Suzuki, Kouji Nishida, Masao Fukunaga, Akiko Fujino
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Patent number: 7754377Abstract: A lithium ion secondary battery includes a positive electrode capable of absorbing and desorbing lithium ion, a negative electrode capable of absorbing and desorbing lithium ion, a porous film interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte: the porous film being adhered to a surface of at least one of the positive electrode and the negative electrode; the porous film including a filler and a resin binder; the resin binder content in the porous film being 1.5 to 8 parts by weight per 100 parts by weight of the filler; and the resin binder including an acrylonitrile unit, an acrylate unit, or a methacrylate unit.Type: GrantFiled: April 26, 2007Date of Patent: July 13, 2010Assignee: Panasonic CorporationInventors: Tsumoru Ohata, Junji Nakajima, Tetsuya Hayashi, Takashi Takano, Shigeo Ikuta, Kohei Suzuki, Kouji Nishida, Masao Fukunaga, Akiko Fujino