Patents by Inventor Kunihiko Bessho
Kunihiko Bessho 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: 9620768Abstract: A negative electrode 1 for lithium secondary batteries, which can increase the charge/discharge capacity of a lithium secondary battery, includes a negative electrode current collector, a negative electrode active material layer, and a lithium layer. The negative electrode active material layer is disposed on regions and of the respective surfaces and of the negative electrode current collector. The lithium layer is disposed on uncovered regions and, which are regions of the respective surfaces and of the negative electrode current collector on which the negative electrode active material layer is not disposed. The lithium layer includes lithium.Type: GrantFiled: May 20, 2013Date of Patent: April 11, 2017Assignee: SANYO Electric Co., Ltd.Inventors: Yasutaka Kogetsu, Kunihiko Bessho, Takashi Shimada
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Publication number: 20150147656Abstract: A negative electrode 1 for lithium secondary batteries, which can increase the charge/discharge capacity of a lithium secondary battery, includes a negative electrode current collector, a negative electrode active material layer, and a lithium layer. The negative electrode active material layer is disposed on regions and of the respective surfaces and of the negative electrode current collector. The lithium layer is disposed on uncovered regions and, which are regions of the respective surfaces and of the negative electrode current collector on which the negative electrode active material layer is not disposed. The lithium layer includes lithium.Type: ApplicationFiled: May 20, 2013Publication date: May 28, 2015Applicant: SANYO Electric Co., Ltd.Inventors: Yasutaka Kogetsu, Kunihiko Bessho, Takashi Shimada
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Patent number: 8877291Abstract: The present invention provides a thin film manufacturing method which realizes stable, highly-efficient film formation using a nozzle-type evaporation source while avoiding unnecessary scattering and deposition of a film formation material before the start of the film formation. Used is a film forming apparatus including: an evaporation chamber 16; a film forming chamber 17 in which a substrate 21 is provided; an evaporation source 19 holding a film formation material 15 and including an opening surface 14; a moving mechanism 35 configured to cause the evaporation source 19 to move; and a conductance variable structure 34. The film forming chamber 17 and the evaporation chamber 16 are evacuated. In a state where the differential pressure between these chambers can be secured by the conductance variable structure 34, the nonreactive gas is introduced to the evaporation chamber 16 to adjust the pressure in the evaporation chamber 16 to predetermined pressure or more.Type: GrantFiled: June 1, 2011Date of Patent: November 4, 2014Assignee: Panasonic CorporationInventors: Kazuyoshi Honda, Kunihiko Bessho, Takashi Shimada
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Patent number: 8865258Abstract: The present invention provides a thin film manufacturing method which realizes stable, highly-efficient film formation using a nozzle-type evaporation source while avoiding unnecessary scattering and deposition of a film formation material after the termination of the film formation. Used is a film forming apparatus including: an evaporation chamber 16; a film forming chamber 17 in which a substrate 21 is provided; an evaporation source 19 holding a film formation material 15 and including an opening surface 14; a moving mechanism 35 configured to cause the evaporation source 19 to move; and a conductance variable structure 34.Type: GrantFiled: June 1, 2011Date of Patent: October 21, 2014Assignee: Panasonic CorporationInventors: Kazuyoshi Honda, Kunihiko Bessho, Takashi Shimada
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Patent number: 8668895Abstract: In a purifying method for metal grade silicon, metal grade silicon with a silicon concentration not less than 98 wt % and not more than 99.9 wt % is prepared. The metal grade silicon contains aluminum not less than 1000 ppm and not more than 10000 ppm by weight. The metal grade silicon is heated at a temperature not less than 1500° C. and not more than 1600° C. in an inert atmosphere under pressure not less than 100 Pa and not more than 1000 Pa, and maintained at the temperature in the atmosphere for a predetermined period.Type: GrantFiled: June 24, 2008Date of Patent: March 11, 2014Assignee: Panasonic CorporationInventors: Yuma Kamiyama, Kazuyoshi Honda, Yasuharu Shinokawa, Hiromasa Yagi, Tomofumi Yanagi, Kunihiko Bessho
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Publication number: 20140050850Abstract: A vacuum apparatus (100) includes: a vacuum chamber (11); a heat source (12) disposed inside the vacuum chamber (11); a cooling device (20) that cools the heat source (12) by circulation of a cooling gas; a gas feed line (1) connected to the cooling device (20) and extending outside the vacuum chamber (11); a cooling gas feeder (14) that feeds the cooling gas to the cooling device (20) through the gas feed line (1) when the heat source (12) is to be cooled; and a vacuum pump (13) that evacuates the cooling device (20) when the heat source (12) is to be used.Type: ApplicationFiled: September 27, 2012Publication date: February 20, 2014Inventors: Kazuyoshi Honda, Sadayuki Okazaki, Kunihiko Bessho, Takashi Shimada
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Patent number: 8486549Abstract: A lithium ion secondary battery including: a positive electrode current collector; a positive electrode active material layer that is provided in contact with the positive electrode current collector; a separator layer that is provided on a side of the positive electrode active material layer on which the positive electrode current collector is not provided; a negative electrode active material layer that is provided on a side of the separator layer on which the positive electrode active material layer is not provided, that primarily contains silicon or tin, and that includes a opposing portion opposing the positive electrode active material layer and a non-opposing portion not opposing the positive electrode active material layer, the opposing portion and the non-opposing portion containing lithium produced by a thin film-forming method; and a negative electrode current collector that is provided on a side of the negative electrode active material layer on which the separator layer is not provided.Type: GrantFiled: July 18, 2008Date of Patent: July 16, 2013Assignee: Panasonic CorporationInventors: Kazuyoshi Honda, Toshitada Sato, Daisuke Suetsugu, Katsumi Kashiwagi, Kunihiko Bessho
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Patent number: 8202642Abstract: An object of the invention is to provide a current collector for a non-aqueous secondary battery in which the strength of the current collector is sufficient in forming an electrode plate and an active material can be efficiently disposed on the protrusions of the current collector, and to provide an electrode plate for a non-aqueous secondary battery and a non-aqueous secondary battery using the same. The invention relates to a current collector for a non-aqueous secondary battery, including a metal foil for carrying at least a positive electrode active material or negative electrode active material. Protrusions are formed in a predetermined arrangement pattern on at least one face of the metal foil and at least tops of the protrusions are not compressed.Type: GrantFiled: November 15, 2007Date of Patent: June 19, 2012Assignee: Panasonic CorporationInventors: Masanori Sumihara, Kunihiko Bessho, Takuhiro Nishimura
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Publication number: 20120148746Abstract: The present invention provides a thin film manufacturing method which realizes stable, highly-efficient film formation using a nozzle-type evaporation source while avoiding unnecessary scattering and deposition of a film formation material after the termination of the film formation. Used is a film forming apparatus including: an evaporation chamber 16; a film forming chamber 17 in which a substrate 21 is provided; an evaporation source 19 holding a film formation material 15 and including an opening surface 14; a moving mechanism 35 configured to cause the evaporation source 19 to move; and a conductance variable structure 34.Type: ApplicationFiled: June 1, 2011Publication date: June 14, 2012Inventors: Kazuyoshi Honda, Kunihiko Bessho, Takashi Shimada
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Publication number: 20120141677Abstract: The present invention provides a thin film manufacturing method which realizes stable, highly-efficient film formation using a nozzle-type evaporation source while avoiding unnecessary scattering and deposition of a film formation material before the start of the film formation. Used is a film forming apparatus including: an evaporation chamber 16; a film forming chamber 17 in which a substrate 21 is provided; an evaporation source 19 holding a film formation material 15 and including an opening surface 14; a moving mechanism 35 configured to cause the evaporation source 19 to move; and a conductance variable structure 34. The film forming chamber 17 and the evaporation chamber 16 are evacuated. In a state where the differential pressure between these chambers can be secured by the conductance variable structure 34, the nonreactive gas is introduced to the evaporation chamber 16 to adjust the pressure in the evaporation chamber 16 to predetermined pressure or more.Type: ApplicationFiled: June 1, 2011Publication date: June 7, 2012Inventors: Kazuyoshi Honda, Kunihiko Bessho, Takashi Shimada
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Publication number: 20110111277Abstract: A current collector includes a metal foil and protrusions formed on one face or both faces of the metal foil in a predetermined arrangement. The protrusions are substantially rhombic and aligned in a zigzag. Also, both end portions of each protrusion in each of two orthogonal axial directions protrude outward. Middle portions between the end portions are recessed inward. When columnar blocks of an active material are formed on the protrusions to form an active material layer, the gaps between the protrusions can be increased at portions where the interval between the protrusions is the smallest. As a result, internal stress of the active material layer created by charge/discharge of the battery can be alleviated, and the battery life can be increased.Type: ApplicationFiled: July 21, 2009Publication date: May 12, 2011Inventors: Kunihiko Bessho, Daisuke Suetsugu, Seiichi Kato
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Publication number: 20100196623Abstract: The present invention provides a film forming method and a film forming apparatus each of which is capable of forming films at low cost. The film forming method of the present invention includes the steps of (i) melting a solid material 51 of a thin film to prepare a melted liquid, solidifying the melted liquid 51a to form a rod-shaped body 51b, and pulling out the rod-shaped body 51b, (ii) melting and supplying a part of the rod-shaped body 51b to a melted liquid (evaporation source) 51d, and (iii) using the melted liquid (evaporation source) 51d to form the thin film. The steps (i), (ii), and (iii) are carried out in vacuum.Type: ApplicationFiled: September 9, 2008Publication date: August 5, 2010Inventors: Kazuyoshi Honda, Yuma Kamiyama, Kunihiko Bessho, Tomofumi Yanagi, Yasuharu Shinokawa, Toshitada Sato
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Publication number: 20100167112Abstract: A lithium ion secondary battery including: a positive electrode current collector; a positive electrode active material layer that is provided in contact with the positive electrode current collector; a separator layer that is provided on a side of the positive electrode active material layer on which the positive electrode current collector is not provided; a negative electrode active material layer that is provided on a side of the separator layer on which the positive electrode active material layer is not provided, that primarily contains silicon or tin, and that includes a opposing portion opposing the positive electrode active material layer and a non-opposing portion not opposing the positive electrode active material layer, the opposing portion and the non-opposing portion containing lithium produced by a thin film-forming method; and a negative electrode current collector that is provided on a side of the negative electrode active material layer on which the separator layer is not provided.Type: ApplicationFiled: July 18, 2008Publication date: July 1, 2010Inventors: Kazuyoshi Honda, Toshitada Sato, Daisuke Suetsugu, Katsumi Kashiwagi, Kunihiko Bessho
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Publication number: 20100167111Abstract: An object of the invention is to provide a current collector for a non-aqueous secondary battery in which the strength of the current collector is sufficient in forming an electrode plate and an active material can be efficiently disposed on the protrusions of the current collector, and to provide an electrode plate for a non-aqueous secondary battery and a non-aqueous secondary battery using the same. The invention relates to a current collector for a non-aqueous secondary battery, including a metal foil for carrying at least a positive electrode active material or negative electrode active material. Protrusions are formed in a predetermined arrangement pattern on at least one face of the metal foil and at least tops of the protrusions are not compressed.Type: ApplicationFiled: November 15, 2007Publication date: July 1, 2010Inventors: Masanori Sumihara, Kunihiko Bessho, Takuhiro Nishimura
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Publication number: 20090280049Abstract: In a purifying method for metal grade silicon, metal grade silicon with a silicon concentration not less than 98 wt % and not more than 99.9 wt % is prepared. The metal grade silicon contains aluminum not less than 1000 ppm and not more than 10000 ppm by weight. The metal grade silicon is heated at a temperature not less than 1500° C. and not more than 1600° C. in an inert atmosphere under pressure not less than 100 Pa and not more than 1000 Pa, and maintained at the temperature in the atmosphere for a predetermined period.Type: ApplicationFiled: June 24, 2008Publication date: November 12, 2009Applicant: Panasonic CorporationInventors: Yuma Kamiyama, Kazuyoshi Honda, Yasuharu Shinokawa, Hiromasa Yagi, Tomofumi Yanagi, Kunihiko Bessho
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Publication number: 20080199780Abstract: A method for manufacturing an electrode for an electrochemical element capable of absorbing and releasing lithium ions includes a lithiation treatment method for compensating an irreversible capacity of the electrode for an electrochemical element. In the lithiation treatment method, lithium is provided to the electrode by allowing a lithium vapor to flow with a movement route of the lithium vapor limited.Type: ApplicationFiled: February 21, 2008Publication date: August 21, 2008Inventors: Hiroshi HAYATA, Toshitada Sato, Kunihiko Bessho, Kazuyoshi Honda
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Patent number: 7348098Abstract: A power generation element is stored in an inner space formed by combining a battery case (2) and a seal case (3) formed as a half-shell body with a rectangular plane shape such that the individual openings are placed opposing to each other with a gasket (4) interposed therebetween, and the gasket (4) is pressed between the open end of the battery case (2) and a step (35) of the seal case (3) for sealing during caulking. Because recesses (36) are formed on the individual peripheral edges of a bottom surface (31) of the seal case (3), the strength of straight parts of a seal-case side-peripheral surface (32) of the seal case (3) increases against a seal pressure during caulking, and a decrease of seal capability caused by the straight parts bulging toward the outside during sealing is prevented.Type: GrantFiled: September 8, 2004Date of Patent: March 25, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tetsuya Hayashi, Makoto Nakanishi, Kunihiko Bessho
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Patent number: 6893773Abstract: A power generation element is stored in an inner space formed by combining a battery case (2) and a seal case (3) formed as a half-shell body with a rectangular plane shape such that the individual openings are placed opposing to each other with a gasket (4) interposed therebetween, and the gasket (4) is pressed between the open end of the battery case (2) and a step (35) of the seal case (3) for sealing during caulking. Because recesses (36) are formed on the individual peripheral edges of a bottom surface (31) of the seal case (3), the strength of straight parts of a seal-case side-peripheral surface (32) of the seal case (3) increases against a seal pressure during caulking, and a decrease of seal capability caused by the straight parts bulging toward the outside during sealing is prevented.Type: GrantFiled: October 4, 2001Date of Patent: May 17, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tetsuya Hayashi, Makoto Nakanishi, Kunihiko Bessho
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Publication number: 20050031952Abstract: A power generation element is stored in an inner space formed by combining a battery case (2) and a seal case (3) formed as a half-shell body with a rectangular plane shape such that the individual openings are placed opposing to each other with a gasket (4) interposed therebetween, and the gasket (4) is pressed between the open end of the battery case (2) and a step (35) of the seal case (3) for sealing during caulking. Because recesses (36) are formed on the individual peripheral edges of a bottom surface (31) of the seal case (3), the strength of straight parts of a seal-case side-peripheral surface (32) of the seal case (3) increases against a seal pressure during caulking, and a decrease of seal capability caused by the straight parts bulging toward the outside during sealing is prevented.Type: ApplicationFiled: September 8, 2004Publication date: February 10, 2005Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Tetsuya Hayashi, Makoto Nakanishi, Kunihiko Bessho
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Publication number: 20020182494Abstract: A power generation element is stored in an inner space formed by combining a battery case (2) and a seal case (3) formed as a half-shell body with a rectangular plane shape such that the individual openings are placed opposing to each other with a gasket (4) interposed therebetween, and the gasket (4) is pressed between the open end of the battery case (2) and a step (35) of the seal case (3) for sealing during caulking. Because recesses (36) are formed on the individual peripheral edges of a bottom surface (31) of the seal case (3), the strength of straight parts of a seal-case side-peripheral surface (32) of the seal case (3) increases against a seal pressure during caulking, and a decrease of seal capability caused by the straight parts bulging toward the outside during sealing is prevented.Type: ApplicationFiled: June 13, 2002Publication date: December 5, 2002Inventors: Tetsuya Hayashi, Makoto Nakanishi, Kunihiko Bessho