Patents by Inventor Rikako Imoto
Rikako Imoto 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: 20230327217Abstract: A battery having a low internal resistance is provided. A secondary battery includes an electrode wound body, a positive electrode current collector plate, a negative electrode current collector plate, and an outer package. The electrode wound body has a structure in which a positive electrode having a band shape and a negative electrode having a band shape are stacked with a separator interposed therebetween, and are in a wound configuration. The outer package contains the electrode wound body, the positive electrode current collector plate, and the negative electrode current collector plate. The negative electrode includes, on a negative electrode foil having a band shape, a negative electrode active material covered part covered with a negative electrode active material layer, and a negative electrode active material uncovered part.Type: ApplicationFiled: April 18, 2023Publication date: October 12, 2023Inventors: Rikako IMOTO, Masashi TAKAHASHI, Hideki NAKAI
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Publication number: 20210167413Abstract: A secondary battery includes a wound electrode body having a positive electrode, a negative electrode, and a separator. The positive electrode and the negative electrode are stacked on each other with the separator interposed therebetween and are wound about a winding axis. The wound electrode body has a section perpendicular to the winding axis. The section has an elongated shape that includes a flat part and a pair of curved parts. The curved parts oppose each other with the flat part interposed therebetween. The negative electrode includes a negative electrode current collector and a negative electrode active material layer provided on the negative electrode current collector. A ratio of a second distance to a first distance is less than 1.Type: ApplicationFiled: February 9, 2021Publication date: June 3, 2021Inventors: Rikako IMOTO, Takaaki MATSUI, Hideki NAKAI
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Publication number: 20210167470Abstract: A secondary battery includes a wound electrode body. The wound electrode body includes a positive electrode, a negative electrode, and a separator. The positive electrode and the negative electrode are stacked on each other with the separator interposed therebetween and are wound about a winding axis. The wound electrode body has a section perpendicular to the winding axis. The section has an elongated shape that includes a flat part and a pair of curved parts. The curved parts oppose each other with the flat part interposed therebetween. The negative electrode includes a negative electrode current collector and a negative electrode active material layer provided on the negative electrode current collector. A width of the wound electrode body, a wound-layer number of the wound electrode body, and a ratio of a second distance to a first distance satisfy at least one of Condition A and Condition B.Type: ApplicationFiled: February 9, 2021Publication date: June 3, 2021Inventors: Takaaki MATSUI, Kazuki HONDA, Rikako IMOTO, Hideki NAKAI, Takashi SATO
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Publication number: 20200052343Abstract: A battery includes a wound electrode body with a substantially cylindrical shape, and an exterior material. The wound electrode body includes a positive electrode, a negative electrode, and a separator. The exterior material is configured to cover the wound electrode body. In at least one round from an outermost periphery of winding of the wound electrode body, one or more of a positive electrode, a negative electrode, a positive electrode current collector and a negative electrode current collector include at least one convex portion projecting in an outer peripheral direction.Type: ApplicationFiled: October 17, 2019Publication date: February 13, 2020Inventors: Rikako IMOTO, Yoshiichi HORIKOSHI, Hideki NAKAI
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Patent number: 10553855Abstract: A secondary battery capable of improving the cycle characteristics and the initial charge and discharge characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. The anode has an anode active material layer on an anode current collector. The anode active material layer contains a crystalline anode active material having silicon as an element, and is linked to the anode current collector.Type: GrantFiled: June 30, 2017Date of Patent: February 4, 2020Assignee: MURATA MANUFACTURING CO., LTDInventors: Takakazu Hirose, Kenichi Kawase, Kazunori Noguchi, Takayuki Fujii, Rikako Imoto
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Publication number: 20170301911Abstract: A secondary battery capable of improving the cycle characteristics and the initial charge and discharge characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. The anode has an anode active material layer on an anode current collector. The anode active material layer contains a crystalline anode active material having silicon as an element, and is linked to the anode current collector.Type: ApplicationFiled: June 30, 2017Publication date: October 19, 2017Inventors: Takakazu Hirose, Kenichi Kawase, Kazunori Noguchi, Takayuki Fujii, Rikako Imoto
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Patent number: 9786957Abstract: A battery including a cathode, an anode, and an electrolytic solution. The electrolytic solution is impregnated in a separator provided between the cathode and the anode. The anode has an insulative coat on an anode active material layer provided on an anode current collector. The coat contains an insulating material such as a meal hydroxide and a metal oxide. The coat is in a form of plate divided into a plurality of portions. The insulation property of the coat prevents internal short circuit. A plurality of portions of the coat prevent separation of the anode active material layer and decomposition of the electrolytic solution. Further, even when short circuit occurs, heat generation is prevented by heat absorption characteristics of the coat.Type: GrantFiled: August 23, 2016Date of Patent: October 10, 2017Assignee: SONY CORPORATIONInventors: Takayuki Fujii, Kenichi Kawase, Hideki Nakai, Rikako Imoto, Kensuke Yamamoto
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Patent number: 9564640Abstract: A current collector forming an electrode for battery is provided. The electrode current collector includes a conductive layer made of copper or a copper alloy. Furthermore, the conductive layer has a plurality of crystallites, the crystallites containing crystallites having a cross-section area of 20 ?m2 or more.Type: GrantFiled: June 25, 2007Date of Patent: February 7, 2017Assignee: SONY CORPORATIONInventors: Masayuki Iwama, Rikako Imoto, Kenichi Kawase, Akinori Kita
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Publication number: 20160365610Abstract: A battery including a cathode, an anode, and an electrolytic solution. The electrolytic solution is impregnated in a separator provided between the cathode and the anode. The anode has an insulative coat on an anode active material layer provided on an anode current collector. The coat contains an insulating material such as a meal hydroxide and a metal oxide. The coat is in a form of plate divided into a plurality of portions. The insulation property of the coat prevents internal short circuit. A plurality of portions of the coat prevent separation of the anode active material layer and decomposition of the electrolytic solution. Further, even when short circuit occurs, heat generation is prevented by heat absorption characteristics of the coat.Type: ApplicationFiled: August 23, 2016Publication date: December 15, 2016Inventors: TAKAYUKI FUJII, KENICHI KAWASE, HIDEKI NAKAI, RIKAKO IMOTO, KENSUKE YAMAMOTO
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Patent number: 8951672Abstract: A battery capable of improving the cycle characteristics and the swollenness characteristics is provided. The battery includes a cathode, an anode, and an electrolytic solution. The node has an anode current collector and an anode active material layer provided thereon, and the anode active material layer contains a plurality of anode active material particles having silicon, and a metal material having a metal element not being alloyed with an electrode reactant in a gap between the anode active material particles.Type: GrantFiled: January 24, 2008Date of Patent: February 10, 2015Assignee: Sony CorporationInventors: Takakazu Hirose, Kenichi Kawase, Hideki Nakai, Rikako Imoto, Nozomu Morita
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Publication number: 20140162120Abstract: A battery including a cathode, an anode, and an electrolytic solution. The electrolytic solution is impregnated in a separator provided between the cathode and the anode. The anode has an insulative coat on an anode active material layer provided on an anode current collector. The coat contains an insulating material such as a meal hydroxide and a metal oxide. The coat is in a form of plate divided into a plurality of portions. The insulation property of the coat prevents internal short circuit. A plurality of portions of the coat prevent separation of the anode active material layer and decomposition of the electrolytic solution. Further, even when short circuit occurs, heat generation is prevented by heat absorption characteristics of the coat.Type: ApplicationFiled: February 10, 2014Publication date: June 12, 2014Applicant: Sony CorporationInventors: Takayuki Fujii, Kenichi Kawase, Hideki Nakai, Rikako Imoto, Kensuke Yamamoto
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Patent number: 8741481Abstract: A battery capable of obtaining superior cycle characteristics and safety is provided. The battery includes a cathode, an anode, and an electrolytic solution. The electrolytic solution is impregnated in a separator provided between the cathode and the anode. The anode has an insulative coat on an anode active material layer provided on an anode current collector. The coat contains an insulating material such as a meal hydroxide and a metal oxide. The coat is in a form of plate divided into a plurality of portions. The insulation property of the coat prevents internal short circuit. A plurality of portions of the coat prevent separation of the anode active material layer and decomposition of the electrolytic solution. Further, even when short circuit occurs, heat generation is prevented by heat absorption characteristics of the coat.Type: GrantFiled: October 8, 2008Date of Patent: June 3, 2014Assignee: Sony CorporationInventors: Takayuki Fujii, Kenichi Kawase, Hideki Nakai, Rikako Imoto, Kensuke Yamamoto
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Patent number: 8097365Abstract: A current collector forming an electrode for battery. The electrode current collector is made of copper or a copper alloy, and has a front surface color and a back surface color, at least one color of which is a color belonging to a color space represented by: 50?L*?80, 5?a*<60, 5?b*<60, where L*, a*, and b* are numeric values determined based on the L*a*b* calorimetric system described in JIS Z 8729.Type: GrantFiled: June 25, 2007Date of Patent: January 17, 2012Assignee: Sony CorporationInventors: Masayuki Iwama, Kenichi Kawase, Rikako Imoto, Akinori Kita, Kotaro Satori
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Publication number: 20100092856Abstract: A secondary battery capable of improving the cycle characteristics and the initial charge and discharge characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. The anode has an anode active material layer on an anode current collector. The anode active material layer contains a crystalline anode active material having silicon as an element, and is linked to the anode current collector.Type: ApplicationFiled: April 7, 2009Publication date: April 15, 2010Applicant: SONY CORPORATIONInventors: Takakazu Hirose, Kenichi Kawase, Kazunori Noguchi, Takayuki Fujii, Rikako Imoto
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Publication number: 20090317726Abstract: A secondary battery capable of improving the cycle characteristics and the initial charge and discharge characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. The anode has an anode active material layer on an anode current collector. The anode active material layer contains a crystalline anode active material having silicon as an element, and is linked to the anode current collector.Type: ApplicationFiled: June 25, 2009Publication date: December 24, 2009Applicant: SONY CORPORATIONInventors: Takakazu Hirose, Kenichi Kawase, Kazunori Noguchi, Takayuki Fujii, Rikako Imoto
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Publication number: 20090098458Abstract: A battery capable of obtaining superior cycle characteristics and safety is provided. The battery includes a cathode, an anode, and an electrolytic solution. The electrolytic solution is impregnated in a separator provided between the cathode and the anode. The anode has an insulative coat on an anode active material layer provided on an anode current collector. The coat contains an insulating material such as a meal hydroxide and a metal oxide. The coat is in a form of plate divided into a plurality of portions. The insulation property of the coat prevents internal short circuit. A plurality of portions of the coat prevent separation of the anode active material layer and decomposition of the electrolytic solution. Further, even when short circuit occurs, heat generation is prevented by heat absorption characteristics of the coat.Type: ApplicationFiled: October 8, 2008Publication date: April 16, 2009Applicant: SONY CORPORATIONInventors: Takayuki Fujii, Kenichi Kawase, Hideki Nakai, Rikako Imoto, Kensuke Yamamoto
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Publication number: 20080233478Abstract: A battery capable of improving the cycle characteristics and the swollenness characteristics is provided. The battery includes a cathode, an anode, and an electrolytic solution. The node has an anode current collector and an anode active material layer provided thereon, and the anode active material layer contains a plurality of anode active material particles having silicon, and a metal material having a metal element not being alloyed with an electrode reactant in a gap between the anode active material particles.Type: ApplicationFiled: January 24, 2008Publication date: September 25, 2008Applicant: SONY CORPORATIONInventors: Takakazu Hirose, Kenichi Kawase, Hideki Nakai, Rikako Imoto, Nozomu Morita
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Publication number: 20080220338Abstract: A current collector forming an electrode for battery is provided. The electrode current collector includes a conductive layer made of copper or a copper alloy. Furthermore, the conductive layer has a plurality of crystallites, the crystallites containing crystallites having a cross-section area of 20 ?m2 or more.Type: ApplicationFiled: June 25, 2007Publication date: September 11, 2008Applicant: SONY CORPORATIONInventors: Masayuki Iwama, Rikako Imoto, Kenichi Kawase, Akinori Kita
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Publication number: 20080176144Abstract: A current collector forming an electrode for battery. The electrode current collector is made of copper or a copper alloy, and has a front surface color and a back surface color, at least one color of which is a color belonging to a color space represented by: 50?L*?80, 5?a*<60, 5?b*<60, where L*, a*, and b* are numeric values determined based on the L*a*b* calorimetric system described in JIS Z 8729.Type: ApplicationFiled: June 25, 2007Publication date: July 24, 2008Applicant: SONY CORPORATIONInventors: Masayuki Iwama, Kenichi Kawase, Rikako Imoto, Akinori Kita, Kotaro Satori