Patents by Inventor Masatomo Nagatani
Masatomo Nagatani 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: 7736796Abstract: A battery pack is made up of a plurality of flat prismatic batteries arranged face to face, each battery having one electrode terminal protruding from one end face in the height direction of the battery case and this end face or a side face of the battery serving as the other electrode terminal. The connector for electrically connecting adjacent prismatic batteries includes a flat part that is welded to one electrode terminal of one prismatic battery of the adjacent prismatic batteries, and a cylindrical part that is fitted onto and welded to the other electrode terminal of the other prismatic battery. The cylindrical part is formed in an attachment part that extends from the flat part through an upright part in the direction in which the batteries are aligned. The connector enables reliable electrical connection of the prismatic batteries despite possible variation in height of the electrode terminals.Type: GrantFiled: December 1, 2006Date of Patent: June 15, 2010Assignee: Panasonic CorporationInventors: Masatomo Nagatani, Yasushi Hirakawa
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Patent number: 7700230Abstract: A generally oval battery including a battery case (2) having a generally oval cross section, a generally oval sealing plate (3) and an electrode plate assembly, the sealing plate (3) having a U-shaped cross section and the battery having a thickness of 4 mm or more and an aspect ratio of 3 or more, whereby the control of a vent for discharging gas that is generated in the battery is made easy and a battery is provided which has a discharge mechanism capable of discharging gas easily and safely, without requiring expensive equipment or many processing steps.Type: GrantFiled: February 16, 2005Date of Patent: April 20, 2010Assignee: Panasonic CorporationInventors: Masatomo Nagatani, Tatsuya Hashimoto
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Patent number: 7700231Abstract: A battery, suitable for forming a battery pack, includes an electrode assembly having a positive electrode plate and a negative electrode plate, and a separator wound or laminated together, core materials of the negative and positive electrode plates being bared respectively at either end. A bottomed cylindrical outer case having a bottom is connected to either end face of the electrode assembly to serve as a battery terminal. Electrolyte is impregnated in the electrode assembly and a lid connected to the other end face of the electrode assembly and fixedly attached to the outer case with a sealer and an insulator interposed therebetween. A connecting part is a part of the lid so that the connecting part engages with and connects to a bottom part of the outer case of another battery.Type: GrantFiled: December 26, 2002Date of Patent: April 20, 2010Assignee: Panasonic CorporationInventors: Kenji Kimura, Tatsuya Hashimoto, Takabumi Fujii, Seiichi Uemoto, Hironori Yukisada, Masatomo Nagatani
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Patent number: 7601460Abstract: A prismatic battery with highly reliable sealing properties and its manufacturing method, wherein a negative collector is welded to one end of an electrode plate group accommodated in a prismatic case, the collector being connected to an electrode pole that functions as the negative electrode terminal, and the electrode pole is fitted into a support cylinder that is provided on an upper lid for closing one open end of the case. An insulating gasket is interposed between an inner periphery of the support cylinder and an outer periphery of the electrode pole, the support cylinder being formed with at least one annular crimped portion that has an arc-shaped longitudinal cross section.Type: GrantFiled: November 26, 2004Date of Patent: October 13, 2009Assignee: Panasonic CorporationInventors: Tatsuya Hashimoto, Masatomo Nagatani, Hiroaki Ichinose
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Publication number: 20090064487Abstract: A prismatic battery with highly reliable sealing properties and its manufacturing method, wherein a negative collector is welded to one end of an electrode plate group accommodated in a prismatic case, the collector being connected to an electrode pole that functions as the negative electrode terminal, and the electrode pole is fitted into a support cylinder that is provided on an upper lid for closing one open end of the case. An insulating gasket is interposed between an inner periphery of the support cylinder and an outer periphery of the electrode pole, the support cylinder being formed with at least one annular crimped portion that has an arc-shaped longitudinal cross section.Type: ApplicationFiled: November 6, 2008Publication date: March 12, 2009Applicant: Panasonic Corporation (formerly known as Matsushita Electric Industrial Co., Ltd.)Inventors: Tatsuya HASHIMOTO, Masatomo NAGATANI, Hiroaki ICHINOSE
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Patent number: 7351493Abstract: In a battery pack (1) that accommodates a plurality of batteries (11) arranged in parallel in a case (2) that forms a cooling-air passage (3), the cooling-air passage (3) and a gas-discharge passage (4) for discharging gas leaking from the battery (11) when the battery (11) falls into abnormal state are formed and separated from each other in the case (2).Type: GrantFiled: June 3, 2003Date of Patent: April 1, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Seiichi Uemoto, Kenji Kimura, Tatsuya Hashimoto, Takabumi Fujii, Hironori Yukisada, Masatomo Nagatani
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Publication number: 20070243462Abstract: A generally oval battery including a battery case (2) having a generally oval cross section, a generally oval sealing plate (3) and an electrode plate assembly, the sealing plate (3) having a U-shaped cross section and the battery having a thickness of 4 mm or more and an aspect ratio of 3 or more, whereby the control of a vent for discharging gas that is generated in the battery is made easy and a battery is provided which has a discharge mechanism capable of discharging gas easily and safely, without requiring expensive equipment or many processing steps.Type: ApplicationFiled: February 16, 2005Publication date: October 18, 2007Applicant: C/O MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Masatomo Nagatani, Tatsuya Hashimoto
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Publication number: 20070141458Abstract: A battery pack is made up of a plurality of flat prismatic batteries arranged face to face, each battery having one electrode terminal protruding from one end face in the height direction of the battery case and this end face or a side face of the battery serving as the other electrode terminal. The connector for electrically connecting adjacent prismatic batteries includes a flat part that is welded to one electrode terminal of one prismatic battery of the adjacent prismatic batteries, and a cylindrical part that is fitted onto and welded to the other electrode terminal of the other prismatic battery. The cylindrical part is formed in an attachment part that extends from the flat part through an upright part in the direction in which the batteries are aligned. The connector enables reliable electrical connection of the prismatic batteries despite possible variation in height of the electrode terminals.Type: ApplicationFiled: December 1, 2006Publication date: June 21, 2007Inventors: Masatomo Nagatani, Yasushi Hirakawa
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Patent number: 7192671Abstract: In a battery having a structure that an electrode plate group, formed by winding a positive electrode plate and a negative electrode plate with a separator interposed therebetween, is housed in a battery case together with an electrolyte solution, the electrode plate group is rolled around a roll core, and both ends of the roll core are supported by the battery case.Type: GrantFiled: March 24, 2003Date of Patent: March 20, 2007Assignee: Matsushita Electrical Industrial Co., Ltd.Inventors: Tatsuya Hashimoto, Kenji Kimura, Seiichi Uemoto, Hironori Yukisada, Masatomo Nagatani, Takabumi Fujii
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Publication number: 20050170239Abstract: In a battery pack (1) that accommodates a plurality of batteries (11) arranged in parallel in a case (2) that forms a cooling-air passage (3), the cooling-air passage (3) and a gas-discharge passage (4) for discharging gas leaking from the battery (11) when the battery (11) falls into abnormal state are formed and separated from each other in the case (2).Type: ApplicationFiled: June 3, 2003Publication date: August 4, 2005Applicant: Matsushita Electric Industrial CoInventors: Seiichi Uemoto, Kenji Kimura, Tetsuya Hashimoto, Takabumi Fujii, Hironori Yukisada, Masatomo Nagatani
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Publication number: 20050153194Abstract: A battery, suitable for forming a battery pack, includes an electrode assembly having a positive electrode plate and a negative electrode plate, and a separator wound or laminated together, core materials of the negative and positive electrode plates being bared respectively at either end. A bottomed cylindrical outer case having a bottom is connected to either end face of the electrode assembly to serve as a battery terminal. Electrolyte is impregnated in the electrode assembly and a lid is connected to the other end face of the electrode assembly and fixedly attached to the outer case with a sealer and an insulator interposed therebetween. A connecting part is a part of the lid so that the connecting part engages with and connects to a bottom part of the outer case of another battery.Type: ApplicationFiled: December 26, 2002Publication date: July 14, 2005Inventors: Kenji Kimura, Tatsuya Hashimoto, Takabumi Fujii, Seiichi Uemoto, Hironori Yukisada, Masatomo Nagatani
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Publication number: 20050118501Abstract: A prismatic battery with highly reliable sealing properties and its manufacturing method, wherein a negative collector is welded to one end of an electrode plate group accommodated in a prismatic case, the collector being connected to an electrode pole that functions as the negative electrode terminal, and the electrode pole is fitted into a support cylinder that is provided on an upper lid for closing one open end of the case. An insulating gasket is interposed between an inner periphery of the support cylinder and an outer periphery of the electrode pole, the support cylinder being formed with at least one annular crimped portion that has an arc-shaped longitudinal cross section.Type: ApplicationFiled: November 26, 2004Publication date: June 2, 2005Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Tatsuya Hashimoto, Masatomo Nagatani, Hiroaki Ichinose
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Publication number: 20030186113Abstract: In a battery having a structure that an electrode plate group, formed by winding a positive electrode plate and a negative electrode plate with a separator interposed therebetween, is housed in a battery case together with an electrolyte solution, the electrode plate group is rolled around a roll core, and both ends of the roll core are supported by the battery case.Type: ApplicationFiled: March 24, 2003Publication date: October 2, 2003Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Tatsuya Hashimoto, Kenji Kimura, Seiichi Uemoto, Hironori Yukisada, Masatomo Nagatani, Takabumi Fujii