Patents by Inventor Yoshinori Takamuku
Yoshinori Takamuku 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: 10755865Abstract: An electrolytic capacitor includes a capacitor element; a bottomed case that houses the capacitor element; a sealing member that seals an opening of the bottomed case; a tab terminal connected to the capacitor element and penetrating through the sealing member; and a resin layer that covers at least part of a main surface of the sealing member, the main surface being disposed outside the bottomed case. The tab terminal includes a first portion containing a first metal and a second portion containing a second metal. The resin layer is in contact with the first portion and the second portion. Linear expansion coefficient ?1 of the first metal, linear expansion coefficient ?2 of the second metal, and linear expansion coefficient ?r of the resin layer satisfy a relation of ?1<?r<?2 or ?r<?1<?2.Type: GrantFiled: November 14, 2018Date of Patent: August 25, 2020Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Daisuke Kubo, Yoshinori Takamuku, Doyu Hachisu
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Publication number: 20190103230Abstract: An electrolytic capacitor includes a capacitor element; a bottomed case that houses the capacitor element; a sealing member that seals an opening of the bottomed case; a tab terminal connected to the capacitor element and penetrating through the sealing member; and a resin layer that covers at least part of a main surface of the sealing member, the main surface being disposed outside the bottomed case. The tab terminal includes a first portion containing a first metal and a second portion containing a second metal. The resin layer is in contact with the first portion and the second portion. Linear expansion coefficient ?1 of the first metal, linear expansion coefficient ?2 of the second metal, and linear expansion coefficient ?r of the resin layer satisfy a relation of ?1<?r<?2 or ?r<?1<?2.Type: ApplicationFiled: November 14, 2018Publication date: April 4, 2019Inventors: DAISUKE KUBO, YOSHINORI TAKAMUKU, DOYU HACHISU
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Patent number: 8351182Abstract: An electric double layer capacitor includes a first collector, a first polarizable electrode layer provided on the first collector, a second collector, a second polarizable electrode layer provided on the second collector and facing the first polarizable electrode layer, a separator having an insulating property and provided between the first polarizable electrode layer and the second polarizable electrode layer, and a driving electrolyte impregnated in the first polarizable electrode layer and the second polarizable electrode layer. The polarizable electrode layers mainly contain activated carbon made from phenol resin, have a surface roughness not larger than 0.6 ?m, and have an electrode density ranging from 0.5 g/cm3 to 0.7 g/cm3. This electric double layer capacitor has characteristics deteriorating little even at low temperatures, thus having a reliability for a long time.Type: GrantFiled: August 7, 2006Date of Patent: January 8, 2013Assignee: Panasonic CorporationInventors: Chiho Yamada, Eri Hirose, Yoshinori Takamuku, Hideki Shimamoto
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Patent number: 7924548Abstract: An electric double layer capacitor includes a positive electrode, a negative electrode which faces the positive electrode and is isolated therefrom, and an electrolyte solution. The positive electrode includes a first current collector of a metal foil and a first polarizable electrode layer on the first current collector, the first polarizable electrode layer containing a phosphorus compound. The negative electrode includes a second current collector of a metal foil and a second polarizable electrode layer on the second current collector. The electrolyte solution, with which the first and second polarizable electrode layers are impregnated, has fluorine-containing anions as an electrolyte solute.Type: GrantFiled: February 14, 2007Date of Patent: April 12, 2011Assignee: Panasonic CorporationInventors: Chiho Yamada, Yoshinori Takamuku, Motohiro Sakata
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Patent number: 7881043Abstract: A wound electric double-layer capacitor suppresses electrochemical reaction on polarized electrode layers, reduces characteristic degradation, and has high reliability. The capacitor has a capacitor element formed by winding positive and negative electrodes with a separator interposed between them, a metal case for storing the capacitor element and an electrolyte for driving, and a sealing member for sealing an opening of the metal case. In the positive and negative electrodes, positive and negative electrode lead wires are coupled to exposed parts of current collectors having polarized electrode layers on their both surfaces, respectively. The negative electrode is wound at least one extra turn from the winding end of the positive electrode of the capacitor element, and hence a part where the polarized electrode layers formed in the negative electrode face each other through the separator is formed on the outermost periphery of the capacitor element.Type: GrantFiled: November 21, 2006Date of Patent: February 1, 2011Assignee: Panasonic CorporationInventors: Eri Hirose, Yoshinori Takamuku, Yasuyuki Ito, Satomi Onishi
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Publication number: 20090310281Abstract: A wound electric double-layer capacitor suppresses electrochemical reaction on polarized electrode layers, reduces characteristic degradation, and has high reliability. The capacitor has a capacitor element formed by winding positive and negative electrodes with a separator interposed between them, a metal case for storing the capacitor element and an electrolyte for driving, and a sealing member for sealing an opening of the metal case. In the positive and negative electrodes, positive and negative electrode lead wires are coupled to exposed parts of current collectors having polarized electrode layers on their both surfaces, respectively. The negative electrode is wound at least one extra turn from the winding end of the positive electrode of the capacitor element, and hence a part where the polarized electrode layers formed in the negative electrode face each other through the separator is formed on the outermost periphery of the capacitor element.Type: ApplicationFiled: November 21, 2006Publication date: December 17, 2009Inventors: Eri Hirose, Yoshinori Takamuku, Yasuyuki Ito, Satomi Onishi
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Publication number: 20090231781Abstract: An electric double layer capacitor includes a first collector, a first polarizable electrode layer provided on the first collector, a second collector, a second polarizable electrode layer provided on the second collector and facing the first polarizable electrode layer, a separator having an insulating property and provided between the first polarizable electrode layer and the second polarizable electrode layer, and a driving electrolyte impregnated in the first polarizable electrode layer and the second polarizable electrode layer. The polarizable electrode layers mainly contain activated carbon made from phenol resin, have a surface roughness not larger than 0.6 ?m, and have an electrode density ranging from 0.5 g/cm3 to 0.7 g/cm3. This electric double layer capacitor has characteristics deteriorating little even at low temperatures, thus having a reliability for a long time.Type: ApplicationFiled: August 7, 2006Publication date: September 17, 2009Inventors: Chiho Yamada, Eri Hirose, Yoshinori Takamuku, Hideki Shimamoto
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Publication number: 20090154062Abstract: An electric double layer capacitor includes a positive electrode, a negative electrode which faces the positive electrode and is isolated therefrom, and an electrolyte solution. The positive electrode includes a first current collector of a metal foil and a first polarizable electrode layer on the first current collector, the first polarizable electrode layer containing a phosphorus compound. The negative electrode includes a second current collector of a metal foil and a second polarizable electrode layer on the second current collector. The electrolyte solution, with which the first and second polarizable electrode layers are impregnated, has fluorine-containing anions as an electrolyte solute.Type: ApplicationFiled: February 14, 2007Publication date: June 18, 2009Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Chiho Yamada, Yoshinori Takamuku, Motohiro Sakata
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Patent number: 7414826Abstract: When an electrolytic solution of an electric double layer capacitor is prepared, an association is assumed as a model of a solute dissolved in a solvent. The energy of the association and the energies of the reduced association and oxidized association are calculated and a withstand voltage is estimated based thereon. If the withstand voltage exceeds the target value, only the estimated electrolytic solution is actually prepared. As a result, the development time in the development of electrolytic solution is greatly shortened.Type: GrantFiled: August 5, 2003Date of Patent: August 19, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroyuki Maeshima, Hiroki Moriwake, Yoshinori Takamuku, Mamoru Ito
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Patent number: 7099146Abstract: The present invention is to provide an electrolyte with which the withstand voltage and capacitor capacity can be prevented from lowering, and an electrochemical capacitor containing the same. The present invention uses an electrolyte for an electrochemical capacitor comprising a cyclic amidinium salt (B) represented by the general formula (1), wherein the total amount of a cyclic amidinium salt derivative (A) represented by the general formula (2) is not larger than 10 mole % relative to the sum of (A) and (B).Type: GrantFiled: July 28, 2003Date of Patent: August 29, 2006Assignees: Sanyo Chemical Industries, Ltd., Matsushita Electric Industrial, Co., Ltd.Inventors: Yukiya Kobayashi, Hideo Seike, Yoshinori Takamuku
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Publication number: 20060087798Abstract: The present invention is to provide an electrolyte with which the withstand voltage and capacitor capacity can be prevented from lowering, and an electrochemical capacitor containing the same. The present invention uses an electrolyte for an electrochemical capacitor comprising a cyclic amidinium salt (B) represented by the general formula (1), wherein the total amount of a cyclic amidinium salt derivative (A) represented by the general formula (2) is not larger than 10 mole % relative to the sum of (A) and (B).Type: ApplicationFiled: July 28, 2003Publication date: April 27, 2006Inventors: Yukiya Kobayachi, Hideo Seike, Yoshinori Takamuku
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Publication number: 20040245120Abstract: When an electrolytic solution of an electric double layer capacitor is prepared, an association is assumed as a model of a solute dissolved in a solvent. The energy of the association and the energies of the reduced association and oxidized association are calculated and a withstand voltage is estimated based thereon. If the withstand voltage exceeds the target value, only the estimated electrolytic solution is actually prepared. As a result, the development time in the development of electrolytic solution is greatly shortened.Type: ApplicationFiled: April 21, 2004Publication date: December 9, 2004Inventors: Hiroyuki Maeshima, Hiroki Moriwake, Yoshinori Takamuku, Mamoru Ito
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Patent number: 6621684Abstract: Electric double layer capacitors having improved stability of electrochemical properties and improved retention of residual voltage, imparted by using an electrolytic solution containing a polymer, such as acrylonitrile/stryrene copolymer, giving an increased electrolyte ion difusion resistance are provided. The capacitors are useful for electro-storage devices, such as back-up power source for real time clocks. The polymer is useful for suppressing self discharge in electronic components, such as electric double layer capacitor, aluminum electrolytic capacitors, electro-chemical capacitor and secondary batteries.Type: GrantFiled: June 19, 2001Date of Patent: September 16, 2003Assignees: Matsushita Electric Insustrial Co. Ltd., Sanyo Chemical Industries, Ltd.Inventors: Hideki Shimamoto, Yoshinori Takamuku, Yukiya Kobayashi, Minako Fujiyoshi
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Publication number: 20020036884Abstract: An electric double layer capacitors, are disclosed, having improved stability of electrochemical properties and improved retention of residual voltage, imparted by using an electrolytic solution containing a polymer, such as acrylonitrile/ styrene copolymer, giving an increased electrolyte ion difusion resistance. The capacitors are useful for electro-storage devices, such as back-up power source for real time clocks.Type: ApplicationFiled: June 19, 2001Publication date: March 28, 2002Inventors: Hideki Shimamoto, Yoshinori Takamuku, Yukiya Kobayashi, Minako Fujiyoshi
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Patent number: 6315918Abstract: Non-aqueous electrolytic solutions for capacitors which release a little gas, have excellent potential window of electrochemical stability and enable capacitors to show excellent charging/discharging cycle properties and safety performance, and capacitors containing such non-aqueous electrolytic solutions. The non-aqueous electrolytic solution for capacitors comprises an electrolytic solution containing at least one cyclic carbonic ester selected from specified compounds and an electrolyte.Type: GrantFiled: September 11, 1998Date of Patent: November 13, 2001Assignees: Mitsui Chemicals Inc., Matsushita Electric Industrial Co., Ltd.Inventors: Satoko Mita, Tsuneaki Koike, Takeshi Ishitoku, Tatsuyoshi Ishida, Yoshinori Takamuku, Hideki Shimamoto
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Patent number: 6185089Abstract: Non-aqueous electrolytic solutions for capacitor which release little gas and have excellent potential window of electrochemical stability, and which enable capacitors to have excellent charging/discharging cycle properties and safety performance, and capacitors containing such non-aqueous electrolytic solutions. Such non-aqueous electrolytic solutions for capacitors include an electrolyte selected from the group consisting of ammonium salts, phosphonium salts and amidine salts and a solvent for containing at least one phosphoric ester represented by the following formula (I): wherein, R1, R2 and R3, which may be the same or different, are an alkyl group, an unsaturated hydrocarbon group or an aryl group.Type: GrantFiled: September 11, 1998Date of Patent: February 6, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Satoko Mita, Tsuneaki Koike, Yoshinori Takamuku, Hideki Shimamoto
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Patent number: 5776358Abstract: The invention relates to an electrolyte for driving electrolytic capacitor and an electrolytic capacitor using the same, and by preparing by using a solvent mainly composed of organic compound, and dissolving one or more solutes selected from the group consisting of inorganic acids and organic acids, more specifically adding and dissolving at least one of copolymers of polyethylene glycol and polypropylene glycol shown in formulas (1) and (2), or both of the copolymers of polyethylene glycol and polypropylene glycol shown in formulas (1) and (2) simultaneously, the spark generation voltage and chemical conversion factor of formed oxidation film are enhanced, thereby improving the reliability of the electrolytic capacitor.HO--(C.sub.2 H.sub.4 O).sub.n --(C.sub.3 H.sub.6 O).sub.m--(C.sub.2 H.sub.4 O).sub.n --H (1)(n and m are arbitrary natural numbers.)HO--?(C.sub.2 H.sub.4 O).sub.n --(C.sub.3 H.sub.6 O).sub.m !.sub.i --H(2)(n, m, and 1 are arbitrary natural numbers.Type: GrantFiled: May 2, 1997Date of Patent: July 7, 1998Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Nario Niibo, Naoko Yoshida, Yoshinori Takamuku