Patents by Inventor Kosuke Hagiyama
Kosuke Hagiyama 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: 9899649Abstract: A non-aqueous electrolyte secondary battery, when using an aqueous binder as a binder for a negative electrode active material, effectively exhausts the gas generated from an electrode, and thus, even when using it for a long period of time, a decrease in battery capacity is low. The non-aqueous electrolyte secondary battery includes a positive electrode active material layer on a surface of a positive electrode current collector, a negative electrode active material layer comprising an aqueous binder on a surface of a negative electrode current collector, a separator for maintaining an electrolytic solution, and a gas releasing means for releasing a gas generated within the power generating element to an extra space inside of the outer casing, and in which the ratio value of a volume of the extra space to a volume of pores included in the power generating element is 0.5 to 1.0.Type: GrantFiled: March 26, 2014Date of Patent: February 20, 2018Assignees: Nissan Motor Co. Ltd., Automotive Energy Supply CorporationInventors: Fumihiro Kawamura, Ikuma Matsuzaki, Ryuta Yamaguchi, Kosuke Hagiyama, Takashi Honda, Takeshi Miyamoto, Osamu Shimamura, Keisuke Matsumoto
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Patent number: 9847516Abstract: A non-aqueous electrolyte secondary battery allows gas generated when an aqueous binder is used as a binder of a negative electrode active material to be effectively discharged from the electrode, and has small decrease of the battery capacity despite use over a long period of time. The non-aqueous electrolyte secondary battery has a positive electrode active material layer, a negative electrode active material layer, and a separator. The density of the negative electrode active material layer is 1.4 to 1.6 g/cm3, an electrolyte solution layer is disposed between at least one layer of the negative electrode active material layer and the positive electrode active material layer, and the separator, and the ratio of total thickness of the positive electrode, the negative electrode and the separator to total thickness of the positive electrode, the negative electrode, the separator and the electrolyte solution layer, is 0.85 or more and less than 1.0.Type: GrantFiled: March 26, 2014Date of Patent: December 19, 2017Assignees: Nissan Motor Co., Ltd., Automotive Energy Supply CorporationInventors: Kosuke Hagiyama, Takashi Honda, Ryuta Yamaguchi, Ikuma Matsuzaki, Takeshi Miyamoto, Osamu Shimamura, Keisuke Matsumoto
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Patent number: 9666858Abstract: A negative electrode for a secondary battery according to the present invention has a collector and a negative electrode active material layer formed on a surface of the collector and containing negative electrode active material particles. In the negative electrode active material layer, an insulating material is arranged between the negative electrode active material particles so as not to develop conductivity by a percolation path throughout the negative electrode active material layer. It is possible in this configuration to effectively prevent the occurrence of a short-circuit current due to an internal short circuit and the generation of heat due to such short-circuit current flow in the secondary battery while securing the battery performance of the secondary battery.Type: GrantFiled: May 25, 2011Date of Patent: May 30, 2017Assignee: NISSAN MOTOR CO., LTD.Inventors: Kenji Ohara, Sohei Suga, Yasuo Ohta, Tomoya Kubota, Kazuyuki Sakamoto, Takaaki Abe, Satoru Ichikawa, Kenji Hosaka, Kosuke Hagiyama, Hiroshi Miyakubo
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Patent number: 9620782Abstract: Wettability of positive and negative electrode active material layers is improved by having the ratio of the liquid absorption speed of an electrolyte to the positive and negative electrode active material layers in an appropriate range when an aqueous binder is used in the negative electrode active material layer. The non-aqueous electrolyte secondary battery has a power generating element having a positive electrode active material layer on a surface of a positive electrode current collector, a negative electrode active material layer containing an aqueous binder on a surface of a negative electrode current collector, and a separator, and Tc/Ta is in the range of 0.6 to 1.3 when Tc is the soak-in time of the electrolyte liquid into the positive electrode active material layer and Ta is the soak-in time of the electrolyte liquid into the negative electrode active material layer.Type: GrantFiled: March 26, 2014Date of Patent: April 11, 2017Assignee: Nissan Motor Co., Ltd.Inventors: Ryuuta Yamaguchi, Takashi Honda, Kosuke Hagiyama, Hiroshi Ogawa, Takeshi Miyamoto
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Publication number: 20160149178Abstract: A non-aqueous electrolyte secondary battery, when using an aqueous binder as a binder for a negative electrode active material, effectively exhausts the gas generated from an electrode, and thus, even when using it for a long period of time, a decrease in battery capacity is low. The non-aqueous electrolyte secondary battery includes a positive electrode active material layer on a surface of a positive electrode current collector, a negative electrode active material layer comprising an aqueous binder on a surface of a negative electrode current collector, a separator for maintaining an electrolytic solution, and a gas releasing means for releasing a gas generated within the power generating element to an extra space inside of the outer casing, and in which the ratio value of a volume f the extra space to a volume of pores included in the power generating element is 0.5 to 1.0.Type: ApplicationFiled: March 26, 2014Publication date: May 26, 2016Inventors: Fumihiro KAWAMURA, Ikuma MATSUZAKI, Ryuta YAMAGUCHI, Kosuke HAGIYAMA, Takashi HONDA, Takeshi MIYAMOTO, Osamu SHIMAMURA, Keisuke MATSUMOTO
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Publication number: 20160064737Abstract: A non-aqueous electrolyte secondary battery has high vibration resistance when an aqueous binder is used as a binder for a negative electrode active material. A flat laminated type non-aqueous electrolyte secondary battery has a power generating element including a positive electrode obtained by forming a positive electrode active material layer on a surface of a positive electrode current collector; a negative electrode obtained by forming a negative electrode active material layer on a surface of a negative electrode current collector; and a separator, in which the negative electrode active material layer includes 2 to 4% by mass of an aqueous binder with respect to the total mass of the negative electrode active material layer, and the negative electrode active material layer has a rectangular shape, wherein a ratio of a length of long side to a length of short side of the rectangle is 1 to 1.25.Type: ApplicationFiled: March 26, 2014Publication date: March 3, 2016Inventors: Hiroshi OGAWA, Takashi HONDA, Kosuke HAGIYAMA, Ryuuta YAMAGUCHI
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Publication number: 20160056470Abstract: Provided is a means capable of improving wettability of positive and negative electrode active material layers by having the ratio of the liquid absorption speed of an electrolyte to the positive and negative electrode active material layers in an appropriate range when an aqueous binder is used in the negative electrode active material layer. The non-aqueous electrolyte secondary battery has a power generating element having a positive electrode active material layer on a surface of a positive electrode current collector, a negative electrode active material layer containing an aqueous binder on a surface of a negative electrode current collector, and a separator, and Tc/Ta is in the range of 0.6 to 1.3 when Tc is the soak-in time of the electrolyte liquid into the positive electrode active material layer and Ta is the soak-in time of the electrolyte liquid into the negative electrode active material layer.Type: ApplicationFiled: March 26, 2014Publication date: February 25, 2016Inventors: Ryuuta YAMAGUCHI, Takashi HONDA, Kosuke HAGIYAMA, Hiroshi OGAWA, Takeshi MIYAMOTO
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Publication number: 20160056419Abstract: A non-aqueous electrolyte secondary battery allows gas generated when an aqueous binder is used as a binder of a negative electrode active material to be effectively discharged from the electrode, and has small decrease of the battery capacity despite use over a long period of time. The non-aqueous electrolyte secondary battery has a positive electrode active material layer, a negative electrode active material layer, and a separator. The density of the negative electrode active material layer is 1.4 to 1.6 g/cm3, an electrolyte solution layer is disposed between at least one layer of the negative electrode active material layer and the positive electrode active material layer, and the separator, and the ratio of total thickness of the positive electrode, the negative electrode and the separator to total thickness of the positive electrode, the negative electrode, the separator and the electrolyte solution layer, is 0.85 or more and less than 1.0.Type: ApplicationFiled: March 26, 2014Publication date: February 25, 2016Inventors: Kosuke HAGIYAMA, Takashi HONDA, Ryuta YAMAGUCHI, Ikuma MATSUZAKI, Takeshi MIYAMOTO, Osamu SHIMAMURA, Keisuke MATSUMOTO
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Patent number: 9160033Abstract: The present invention provides a non-aqueous electrolyte composition with excellent high-temperature stability and a non-aqueous electrolyte secondary battery using the same. The non-aqueous electrolyte composition includes a supporting electrolyte, an organic solvent, and at least one kind of chemical compound (a) selected from the group consisting of a chemical compound (a1) indicated by the following general formula (1) and a chemical compound (a2) indicated by the following general formula (2).Type: GrantFiled: July 15, 2011Date of Patent: October 13, 2015Assignee: NISSAN MOTOR CO., LTD.Inventors: Kosuke Hagiyama, Azusa Matsuo, Hirofumi Yasuda, Hiroshi Miyakubo
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Publication number: 20130157124Abstract: The present invention provides a non-aqueous electrolyte composition with excellent high-temperature stability and a non-aqueous electrolyte secondary battery using the same. The non-aqueous electrolyte composition includes a supporting electrolyte, an organic solvent, and at least one kind of chemical compound (a) selected from the group consisting of a chemical compound (a1) indicated by the following general formula (1) and a chemical compound (a2) indicated by the following general formula (2).Type: ApplicationFiled: July 15, 2011Publication date: June 20, 2013Inventors: Kosuke Hagiyama, Azusa Matsuo, Hirofumi Yasuda, Hiroshi Miyakubo
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Publication number: 20130071741Abstract: A negative electrode for a secondary battery according to the present invention has a collector and a negative electrode active material layer formed on a surface of the collector and containing negative electrode active material particles. In the negative electrode active material layer, an insulating material is arranged between the negative electrode active material particles so as not to develop conductivity by a percolation path throughout the negative electrode active material layer. It is possible in this configuration to effectively prevent the occurrence of a short-circuit current due to an internal short circuit and the generation of heat due to such short-circuit current flow in the secondary battery while securing the battery performance of the secondary battery.Type: ApplicationFiled: May 25, 2011Publication date: March 21, 2013Inventors: Kenji Ohara, Sohei Suga, Yasuo Ohta, Tomoya Kubota, Kazuyuki Sakamoto, Takaaki Abe, Satoru Ichikawa, Kenji Hosaka, Kosuke Hagiyama, Hiroshi Miyakubo