Patents by Inventor Isao Tochihara
Isao Tochihara 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: 20140038002Abstract: The invention provides a closed type battery comprising a battery element covered with a covering film and a heat fusion seal portion formed by heat fusion on a periphery of the covering film, wherein the cleaving strength upon an internal pressure rise of a seal portion positioned between a positive electrode terminal and a negative electrode terminal is larger than that of any other seal portion, and a safety valve adapted to release pressure upon a battery's internal pressure rise is located at a portion other than said inter-terminal seal portion. The invention also provides an assembled battery wherein a plurality of closed type batteries are stacked one upon another while a safety valve adapted to release pressure upon an increase in the internal pressure of the battery is located at a position in no contact with the covering film surface of an adjoining battery.Type: ApplicationFiled: October 11, 2013Publication date: February 6, 2014Inventors: Tomokazu KUMEUCHI, Takao DAIDOJI, Isao TOCHIHARA
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Patent number: 8617731Abstract: The invention provides a closed type battery comprising a battery element covered with a covering film and a heat fusion seal portion formed by heat fusion on a periphery of the covering film, wherein the cleaving strength upon an internal pressure rise of a seal portion positioned between a positive electrode terminal and a negative electrode terminal is larger than that of any other seal portion, and a safety valve adapted to release pressure upon a battery's internal pressure rise is located at a portion other than said inter-terminal seal portion. The invention also provides an assembled battery wherein a plurality of closed type batteries are stacked one upon another while a safety valve adapted to release pressure upon an increase in the internal pressure of the battery is located at a position in no contact with the covering film surface of an adjoining battery.Type: GrantFiled: February 14, 2007Date of Patent: December 31, 2013Assignee: NEC Energy Devices, Ltd.Inventors: Tomokazu Kumeuchi, Takao Daidoji, Isao Tochihara
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Patent number: 8586219Abstract: The invention provides a closed type battery comprising a battery element covered with a covering film and a heat fusion seal portion formed by heat fusion on a periphery of the covering film, wherein the cleaving strength upon an internal pressure rise of a seal portion positioned between a positive electrode terminal and a negative electrode terminal is larger than that of any other seal portion, and a safety valve adapted to release pressure upon a battery's internal pressure rise is located at a portion other than said inter-terminal seal portion. The invention also provides an assembled battery wherein a plurality of closed type batteries are stacked one upon another while a safety valve adapted to release pressure upon an increase in the internal pressure of the battery is located at a position in no contact with the covering film surface of an adjoining battery.Type: GrantFiled: February 14, 2007Date of Patent: November 19, 2013Assignee: NEC Energy Devices, Ltd.Inventors: Tomokazu Kumeuchi, Takao Daidoji, Isao Tochihara
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Patent number: 8481199Abstract: A sealed battery with a film casing, comprising: a film casing covering a battery element; an electrode terminal pulled out by being conductive-connected to a positive electrode and a negative electrode of the battery element is taken out from a sealing part of the film casing; and a part of the electrode terminal between a portion positioned at the sealing part of the electrode terminal and a part of a portion of the electrode terminal extending outward beyond the sealing part being covered by an insulating resin layer, a region with low strength against bending being formed at the insulating resin layer positioned at a part extending outward beyond the sealing part or a part of the electrode terminal positioned at a lower layer of the insulating resin layer positioned at a part extending outward beyond the sealing part.Type: GrantFiled: June 15, 2007Date of Patent: July 9, 2013Assignee: NEC Energy Devices, Ltd.Inventors: Koichi Zama, Isao Tochihara
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Publication number: 20110293996Abstract: In a stacked secondary battery, positive electrodes 5 and negative electrodes 4, which are formed by integrally forming a positive electrode collector tab 57 and a negative electrode collector tab 47 on a metal foil positive electrode collector 51 and a metal foil negative electrode collector 41, respectively, are stacked together with separators 6 disposed in-between. The separator 6 is also disposed between the opposing parts 8 of the positive electrode collector tab and the negative electrode collector tab. A positive electrode lead 17 and a negative electrode lead 15, connected to the positive electrode collector tab and the negative electrode collector tab, respectively, extend out from the same end surface of the stack of the positive electrodes 5 and the negative electrodes 4 and are drawn out from an outer casing 3.Type: ApplicationFiled: May 20, 2009Publication date: December 1, 2011Applicant: NEC ENERGY DEVICES, LTD.Inventors: Takao Daidoji, Isao Tochihara, Yuuki Hori, Koichi Zama
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Patent number: 8049463Abstract: A stacked battery module or a battery pack is formed by laying a plurality of unit batteries of non-aqueous electrolyte batteries in layers with the surfaces thereof having a large area disposed vis-à-vis and electrically connecting them in series and a temperature fuse is arranged in the central part of the stacked battery module with one of its terminals connected to either the positive electrode terminal or the negative electrode terminal of the stacked battery module while the other terminal connected to a charging terminal for supplying a charging current in a charging operation. One of the terminals of the stacked battery module is connected to a discharging terminal for taking out a discharging current in a discharging operation and the other terminal of the stacked battery module is a common terminal for charging and discharging operations.Type: GrantFiled: November 27, 2006Date of Patent: November 1, 2011Assignee: NEC Energy Devices, Ltd.Inventors: Tomokazu Kumeuchi, Koichi Zama, Isao Tochihara, Izumi Tanaka
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Publication number: 20070292753Abstract: A sealed battery with a film casing, comprising: a film casing covering a battery element; an electrode terminal pulled out by being conductive-connected to a positive electrode and a negative electrode of the battery element is taken out from a sealing part of the film casing; and a part of the electrode terminal between a portion positioned at the sealing part of the electrode terminal and a part of a portion of the electrode terminal extending outward beyond the sealing part being covered by an insulating resin layer, a region with low strength against bending being formed at the insulating resin layer positioned at a part extending outward beyond the sealing part or a part of the electrode terminal positioned at a lower layer of the insulating resin layer positioned at a part extending outward beyond the sealing part.Type: ApplicationFiled: June 15, 2007Publication date: December 20, 2007Applicant: NEC TOKIN CorporationInventors: Koichi Zama, Isao Tochihara
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Publication number: 20070190402Abstract: The invention provides a closed type battery comprising a battery element covered with a covering film and a heat fusion seal portion formed by heat fusion on a periphery of the covering film, wherein the cleaving strength upon an internal pressure rise of a seal portion positioned between a positive electrode terminal and a negative electrode terminal is larger than that of any other seal portion, and a safety valve adapted to release pressure upon a battery's internal pressure rise is located at a portion other than said inter-terminal seal portion. The invention also provides an assembled battery wherein a plurality of closed type batteries are stacked one upon another while a safety valve adapted to release pressure upon an increase in the internal pressure of the battery is located at a position in no contact with the covering film surface of an adjoining battery.Type: ApplicationFiled: February 14, 2007Publication date: August 16, 2007Applicant: NEC TOKIN CORPORATIONInventors: Tomokazu KUMEUCHI, Takao DAIDOJI, Isao TOCHIHARA
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Publication number: 20070120526Abstract: A stacked battery module or a battery pack is formed by laying a plurality of unit batteries of non-aqueous electrolyte batteries in layers with the surfaces thereof having a large area disposed vis-à-vis and electrically connecting them in series and a temperature fuse is arranged in the central part of the stacked battery module with one of its terminals connected to either the positive electrode terminal or the negative electrode terminal of the stacked battery module while the other terminal connected to a charging terminal for supplying a charging current in a charging operation. One of the terminals of the stacked battery module is connected to a discharging terminal for taking out a discharging current in a discharging operation and the other terminal of the stacked battery module is a common terminal for charging and discharging operations.Type: ApplicationFiled: November 27, 2006Publication date: May 31, 2007Applicant: NEC TOKIN CORPORATIONInventors: Tomokazu Kumeuchi, Koichi Zama, Isao Tochihara, Izumi Tanaka
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Patent number: 5351789Abstract: A positioning mechanism includes a housing, at least one holding member inserted into a lateral opening formed in the housing at the side wall, thereof and an electrostrictive effect element mounted on the holding member. When the electrostrictive effect element is energized, it expands to urge the holding member against a moving member which is to be stopped and held a desired location.Type: GrantFiled: February 27, 1992Date of Patent: October 4, 1994Assignee: NEC CorporationInventors: Isao Tochihara, Osamu Yamashita, Mitsunori Sano, Tomoyuki Takahashi, Makoto Nakano
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Patent number: D348433Type: GrantFiled: October 22, 1992Date of Patent: July 5, 1994Assignee: NEC CorporationInventors: Isao Tochihara, Mitsunori Sano