Patents by Inventor Kunihiko Miyamoto
Kunihiko Miyamoto 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: 7851087Abstract: A high-capacity enclosed nickel-zinc primary battery excellent in characteristics such as capacity maintenance factor, energy density, and high-efficient discharge characteristics, an anode using it, and a production method for them. An enclosed nickel-zinc primary battery which uses as an anode an anode active material of nickel hydroxide compound, such as nickel oxyhydroxide, particles and uses zinc alloy gel as a cathode material, wherein a ratio of anode theoretical capacity to cathode theoretical capacity is 1.0-1.6, and a ratio of alkali electrolyte to anode theoretical capacity is 1.0-1.6 ml/Ah.Type: GrantFiled: May 5, 2009Date of Patent: December 14, 2010Assignee: Toshiba Battery Co., Ltd.Inventors: Kunihiko Miyamoto, Shuichiro Irie, Shinichi Miyamoto, Naomi Hadano, Teiji Okayama
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Patent number: 7763383Abstract: The object of the invention is to provide an alkali primary battery being excellent in high rate discharge characteristics with less increase of the inner pressure by generating hydrogen in the overdischarge process. The invention provides a sealed nickel zinc primary battery comprising at least a positive electrode having a higher oxide of nickel as a positive electrode active substance, a negative electrode having zinc or an alloy thereof as a negative electrode active substance, a separator and an electrolyte solution housed in a vessel, wherein manganese dioxide is added in a proportion of 3 to 7% by mass relative to the higher oxide of nickel in the positive electrode, and the ratio between the theoretical capacity of the negative electrode to the theoretical capacity of the positive electrode (the theoretical capacity of the negative electrode/theoretical capacity of the positive electrode) is in the range of 1.2 to 1.0.Type: GrantFiled: May 28, 2003Date of Patent: July 27, 2010Assignee: Toshiba Battery Co., Ltd.Inventors: Kunihiko Miyamoto, Shuichiro Irie, Eiki Kashiwazaki, Teiji Okayama
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Publication number: 20090274959Abstract: A high-capacity enclosed nickel-zinc primary battery excellent in characteristics such as capacity maintenance factor, energy density, and high-efficient discharge characteristics, an anode using it, and a production method for them. An enclosed nickel-zinc primary battery which uses as an anode an anode active material of nickel hydroxide compound, such as nickel oxyhydroxide, particles and uses zinc alloy gel as a cathode material, wherein a ratio of anode theoretical capacity to cathode theoretical capacity is 1.0-1.6, and a ratio of alkali electrolyte to anode theoretical capacity is 1.0-1.6 ml/Ah.Type: ApplicationFiled: May 5, 2009Publication date: November 5, 2009Applicant: TOSHIBA BATTERY CO., LTD.Inventors: Kunihiko Miyamoto, Shuichiro Irie, Shinichi Miyamoto, Naomi Hadano, Teiji Okayama
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Patent number: 7594938Abstract: A high-capacity enclosed nickel-zinc primary battery excellent in characteristics such as capacity maintenance factor, energy density, and high-efficient discharge characteristics, an anode using it, and a production method for them. An enclosed nickel-zinc primary battery which uses as an anode an anode active material of nickel hydroxide compound, such as nickel oxyhydroxide, particles and uses zinc alloy gel as a cathode material, wherein a ratio of anode theoretical capacity to cathode theoretical capacity is 1.0-1.6, and a ratio of alkali electrolyte to anode theoretical capacity is 1.0-1.6 ml/Ah.Type: GrantFiled: May 25, 2007Date of Patent: September 29, 2009Assignee: Toshiba Battery Co., Ltd.Inventors: Kunihiko Miyamoto, Shuichiro Irie, Shinichi Miyamoto, Naomi Hadano, Teiji Okayama
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Patent number: 7393612Abstract: An alkaline secondary battery which is characterized in that it comprises, a positive electrode containing nickel hydroxide having a value of 0.8° or more in the half-width of a peak in the (101) plane thereof as measured by X-ray powder diffraction (2?) using Cu—K? ray, and 4.0 to 15% by weight of at least one material selected from the group consisting of zinc and zinc compounds, and an alkali electrolyte, the ratio of which to theoretical capacity of the positive electrode being 0.7 to 2.0 cm3/Ah, the weight of the at least one material being one calculated as zinc element and based on the weight of the nickel hydroxide.Type: GrantFiled: January 3, 2003Date of Patent: July 1, 2008Assignee: Toshiba Battery Co., Ltd.Inventors: Makoto Wakabayashi, Kunihiko Miyamoto, Tetsuya Yamane, Naomi Bando, Kiyoshi Ishitsuka, Ken-ichi Kanno, Hidekazu Oppata
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Publication number: 20080096106Abstract: A high-capacity enclosed nickel-zinc primary battery excellent in characteristics such as capacity maintenance factor, energy density, and high-efficient discharge characteristics, an anode using it, and a production method for them. An enclosed nickel-zinc primary battery which uses as an anode an anode active material of nickel hydroxide compound, such as nickel oxyhydroxide, particles and uses zinc alloy gel as a cathode material, wherein a ratio of anode theoretical capacity to cathode theoretical capacity is 1.0-1.6, and a ratio of alkali electrolyte to anode theoretical capacity is 1.0-1.6 ml/Ah.Type: ApplicationFiled: May 25, 2007Publication date: April 24, 2008Applicant: TOSHIBA BATTERY CO., LTD.Inventors: Kunihiko Miyamoto, Shuichiro Irie, Shinichi Miyamoto, Naomi Hadano, Teiji Okayama
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Publication number: 20070298323Abstract: A high-capacity enclosed nickel-zinc primary battery excellent in characteristics such as capacity maintenance factor, energy density, and high-efficient discharge characteristics, an anode using it, and a production method for them. An enclosed nickel-zinc primary battery which uses as an anode an anode active material of nickel hydroxide compound, such as nickel oxyhydroxide, particles and uses zinc alloy gel as a cathode material, wherein a ratio of anode theoretical capacity to cathode theoretical capacity is 1.0-1.6, and a ratio of alkali electrolyte to anode theoretical capacity is 1.0-1.6 ml/Ah.Type: ApplicationFiled: May 25, 2007Publication date: December 27, 2007Applicant: TOSHIBA BATTERY CO., LTD.Inventors: Kunihiko Miyamoto, Shuichiro Irie, Shinichi Miyamoto, Naomi Hadano, Teiji Okayama
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Publication number: 20070243320Abstract: A high-capacity enclosed nickel-zinc primary battery excellent in characteristics such as capacity maintenance factor, energy density, and high-efficient discharge characteristics, an anode using it, and a production method for them. An enclosed nickel-zinc primary battery which uses as an anode an anode active material of nickel hydroxide compound, such as nickel oxyhydroxide, particles and uses zinc alloy gel as a cathode material, wherein a ratio of anode theoretical capacity to cathode theoretical capacity is 1.0-1.6, and a ratio of alkali electrolyte to anode theoretical capacity is 1.0-1.6 ml/Ah.Type: ApplicationFiled: May 25, 2007Publication date: October 18, 2007Applicant: TOSHIBA BATTERY CO., LTD.Inventors: Kunihiko MIYAMOTO, Shuichiro Irie, Shinichi Miyamoto, Naomi Hadano, Teiji Okayama
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Patent number: 7238447Abstract: A high-capacity enclosed nickel-zinc primary battery excellent in characteristics such as capacity maintenance factor, energy density, and high-efficient discharge characteristics, an anode using it, and a production method for them. An enclosed nickel-zinc primary battery which uses as an anode an anode active material of nickel hydroxide compound, such as nickel oxyhydroxide, particles and uses zinc alloy gel as a cathode material, wherein a ratio of anode theoretical capacity to cathode theoretical capacity is 1.0-1.6, and a ratio of alkali electrolyte to anode theoretical capacity is 1.0-1.6 ml/Ah.Type: GrantFiled: November 16, 2001Date of Patent: July 3, 2007Assignee: Toshiba Battery Co., Ltd.Inventors: Kunihiko Miyamoto, Shuichiro Irie, Shinichi Miyamoto, Naomi Hadano, Teiji Okayama
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Publication number: 20060029863Abstract: According to the invention, a high capacity alkali primary battery excellent in high rate characteristics is obtained using a positive electrode active substance, wherein the particles of the nickel oxyhydroxide base compound as the positive electrode active substance has a surface coated with a higher oxide of cobalt and comprises zinc and cobalt separately or an eutectic crystal with zinc and cobalt, and a half-width of an X-ray diffraction peak at a diffraction angle at around 18° in an X-ray diffraction pattern of 0.4 to 0.48 obtained by using a CuK? line as an X-ray source. A further excellent battery is obtained by using zinc containing a powder with a particle diameter of 75 ?m or less in the range of 10% by mass or more and 20% by mass or less.Type: ApplicationFiled: August 29, 2003Publication date: February 9, 2006Inventors: Shinichi Miyamoto, Kunihiko Miyamoto
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Publication number: 20050244712Abstract: The object of the invention is to provide an alkali primary battery being excellent in high rate discharge characteristics with less increase of the inner pressure by generating hydrogen in the overdischarge process. The invention provides a sealed nickel zinc primary battery comprising at least a positive electrode having a higher oxide of nickel as a positive electrode active substance, a negative electrode having zinc or an alloy thereof as a negative electrode active substance, a separator and an electrolyte solution housed in a vessel, wherein manganese dioxide is added in a proportion of 3 to 7% by mass relative to the higher oxide of nickel in the positive electrode, and the ratio between the theoretical capacity of the negative electrode to the theoretical capacity of the positive electrode (the theoretical capacity of the negative electrode/theoretical capacity of the positive electrode) is in the range of 1.2 to 1.0.Type: ApplicationFiled: May 28, 2003Publication date: November 3, 2005Applicant: Toshiba Battery Co., Ltd.Inventors: Kunihiko Miyamoto, Shuichiro Irie, Eiki Kashiwazaki, Teiji Okayama
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Publication number: 20040072070Abstract: A high-capacity enclosed nickel-zinc primary battery excellent in characteristics such as capacity maintenance factor, energy density, and high-efficient discharge characteristics, an anode using it, and a production method for them. An enclosed nickel-zinc primary battery which uses as an anode an anode active material of nickel hydroxide compound, such as nickel oxyhydroxide, particles and uses zinc alloy gel as a cathode material, wherein a ratio of anode theoretical capacity to cathode theoretical capacity is 1.0-1.6, and a ratio of alkali electrolyte to anode theoretical capacity is 1.0-1.6 ml/Ah.Type: ApplicationFiled: October 14, 2003Publication date: April 15, 2004Inventors: Kunihiko Miyamoto, Shuichiro Irie, Shinichi Miyamoto, Naomi Hadano, Teiji Okayama
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Publication number: 20030140483Abstract: An alkaline secondary battery which is characterized in that it comprises, a positive electrode containing nickel hydroxide having a value of 0.8° or more in the half-width of a peak in the (101) plane thereof as measured by X-ray powder diffraction (2&thgr;) using Cu—K&agr; ray, and 4.0 to 15% by weight of at least one material selected from the group consisting of zinc and zinc compounds, and an alkali electrolyte, the ratio of which to theoretical capacity of the positive electrode being 0.7 to 2.0 cm3/Ah, the weight of the at least one material being one calculated as zinc element and based on the weight of the nickel hydroxide.Type: ApplicationFiled: January 3, 2003Publication date: July 31, 2003Applicant: TOSHIBA BATTERY CO., LTD.Inventors: Makoto Wakabayashi, Kunihiko Miyamoto, Tetsuya Yamane, Naomi Bando, Kiyoshi Ishitsuka, Ken-Ichi Kanno, Hidekazu Oppata
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Patent number: 6582855Abstract: Provided is a current collector substrate in an electrode of an alkaline secondary battery, which is advantageous not only in that it has excellent holding ability for a mixture for electrode, but also in that the utilization of an active material is improved, thereby enhancing the discharge characteristics of the battery, and an electrode and an alkaline secondary battery using the same. This current collector substrate has a plurality of openings formed within the surface of a metal powder sinter sheet which has a thickness (t) of 80 &mgr;m or less and is produced by a powdery calendering process, wherein the openings have periphery portions comprising burr portions protruding in the opposite directions.Type: GrantFiled: May 19, 2000Date of Patent: June 24, 2003Assignee: Toshiba Battery Co., Ltd.Inventors: Kunihiko Miyamoto, Masayoshi Hiruma, Manabu Takezawa
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Patent number: 6528209Abstract: Provided is a active material for positive electrode for an alkaline secondary cell, which advantageously exhibits improved overdischarge characteristics, improved utilization of the active material and an improved effect of suppressing the rise in cell internal pressure, a method for producing the same, and an alkaline secondary cell using the above active material for positive electrode, especially a nickel-hydrogen secondary cell. The above active material comprises nickel hydroxide particles each having a surface to which a cobalt oxide sticks, wherein the cobalt oxide contains 20 to 40% by mole of cobalt(II) oxide, wherein the nickel hydroxide particles form an eutectic together with Co and Zn or/and Y, and the Co content of the eutectic is 2% by mass or less, and the nickel hydroxide particles have a value of a half width of the peak ascribed to the (101) crystal face diffraction of 0.8°/2&thgr;(Cu—K&agr;) or more as measured by powder X-ray diffractometry.Type: GrantFiled: December 28, 2000Date of Patent: March 4, 2003Assignee: Toshiba Battery Co., Ltd.Inventors: Kunihiko Miyamoto, Naomi Bando
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Patent number: 6399247Abstract: A nickel-metal hydride secondary battery comprising electrode group comprising positive electrode comprised mainly of nickel hydroxide, negative electrode comprised mainly of a hydrogen storage alloy, and separator being disposed between the positive electrode and the negative electrode, wherein the electrode group is sealed in battery casing, together with an alkali electrolyte liquid, wherein, in the battery, a W element and an Na element are present simultaneously. The nickel-metal hydride secondary battery of the present invention is advantageous not only in that it exhibits high utilization of the active material and excellent self-discharge characteristics in a high temperature storage as well as high charging efficiency in a high temperature environment, but also in that it has excellent large current discharge characteristics.Type: GrantFiled: February 25, 2000Date of Patent: June 4, 2002Assignees: Toshiba Battery Co., Ltd., Kabushiki Kaisha ToshibaInventors: Hiroshi Kitayama, Hirotaka Hayashida, Masaaki Yamamoto, Naomi Bando, Kunihiko Miyamoto, Hideharu Suzuki
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Publication number: 20010024744Abstract: Provided is a active material for positive electrode for an alkaline secondary cell, which advantageously exhibits improved overdischarge characteristics, improved utilization of the active material and an improved effect of suppressing the rise in cell internal pressure, a method for producing the same, and an alkaline secondary cell using the above active material for positive electrode, especially a nickel-hydrogen secondary cell.Type: ApplicationFiled: December 28, 2000Publication date: September 27, 2001Applicant: TOSHIBA BATTERY CO., LTD.Inventors: Kunihiko Miyamoto, Naomi Bando
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Patent number: 6268082Abstract: The present invention is to provide a production method of an active material for an alkaline secondary battery comprising: a step of mixing particles comprising particles mainly containing nickel hydroxide and particles of a metal cobalt or a cobalt compound in a mixer with a sealed structure comprising a heating means in the presence of oxygen and an alkaline aqueous solution while heating. An active material produced by the method allows a high utilization. And a battery assembled with a positive electrode using the active material has an excellent high ratio discharge characteristic, and hardly causes the capacity decline even at the time of recharging after leaving in the over discharge state for a long time.Type: GrantFiled: March 12, 1999Date of Patent: July 31, 2001Assignee: Toshiba Battery Co., Ltd.Inventors: Masayoshi Hiruma, Naomi Bando, Kunihiko Miyamoto, Makoto Wakabayashi
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Patent number: 5965295Abstract: An alkaline secondary battery comprising a positive electrode, a negative electrode, and an alkaline electrolyte, wherein the positive electrode comprises a conductive substrate and a mixture held by the conductive substrate, the mixture containing nickel hydroxide and a conductive cobalt compound, and the positive electrode has pores, substantially all of the pores each having a diameter with a range of 0.0001 .mu.m to 10 .mu.m.Type: GrantFiled: June 13, 1997Date of Patent: October 12, 1999Assignee: Toshiba Battery Co., Ltd.Inventors: Naomi Bando, Tetsuya Yamane, Masayoshi Hiruma, Makoto Wakabayashi, Kunihiko Miyamoto, Takeshi Fukuju, Ken Komiyama, Hiroshi Kaneko, Ken-ichi Kanno
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Patent number: 5707764Abstract: This invention discloses an alkali secondary battery which includes a cadmium-free positive electrode whose swelling ratio is decreased, and in which the cycle characteristic is improved and the charge efficiency in use at high temperatures is also improved. This alkali secondary battery includes a positive electrode accommodated in a case and having a structure in which a paste containing nickel hydroxide grains, a conductor, and a binder is filled in a metal porous body, a negative electrode accommodated in the case and so arranged as to oppose the positive electrode with a separator sandwiched between them, and an alkali electrolyte contained in the case. The nickel hydroxide grains contained in the positive electrode have a structure in which cobalt and at least one transition metal selected from the group consisting of copper, bismuth, chromium, gallium, indium, lanthanum, scandium, and yttrium are coprecipitated with metal nickel at a ratio of 1.5 to 11.0 wt % with respect to nickel hydroxide.Type: GrantFiled: November 13, 1995Date of Patent: January 13, 1998Assignee: Toshiba Battery Co., Ltd.Inventors: Kunihiko Miyamoto, Takeshi Fukuju, Ken Sugimoto