Patents by Inventor Ikuma MATSUZAKI
Ikuma MATSUZAKI 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: 10998543Abstract: A roll electrode is provided with a core, an electrode, a fixing part and a regulating part. The core extends in an axial direction and has a substantially circular outer circumference. The electrode has an expansion coefficient lower than that of the core. The electrode wound into a roll shape on the outer circumference of the core. The fixing part is fixed to an end portion from which the electrode starts being wound around the core. The regulating part regulates the axial movement of the electrode wound into the roll shape with respect to the core.Type: GrantFiled: October 29, 2018Date of Patent: May 4, 2021Assignee: Envision AESC Japan Ltd.Inventors: Masanobu Sato, Tsuyoshi Kudo, Ikuma Matsuzaki, Yusuke Sasaki, Kazuki Miyatake, Kenta Uwai, Yuta Sadakata, Shigeo Komatsu, Fumihiro Miki
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Patent number: 10770746Abstract: A method for producing a lithium ion secondary battery in which a positive electrode, a heat-resistant insulating layer provided separator having a heat-resistant insulating layer formed of oxide particles on one surface of a resin porous substrate, and a negative electrode are laminated on one another, and a nonaqueous electrolyte is impregnated in the heat-resistant insulating layer provided separator, includes drying the heat-resistant insulating layer provided separator before laminating so that the water content in the heat-resistant insulating layer provided separator remains in a predetermined range. In the drying, the water content in the heat-resistant insulating layer provided separator is decreased to the predetermined range by controlling the dew point and maintaining the predetermined range after reaching the predetermined range of water content.Type: GrantFiled: March 19, 2015Date of Patent: September 8, 2020Assignee: Envision AESC Japan Ltd.Inventors: Ikuma Matsuzaki, Kazuki Miyatake, Keisuke Matsumoto, Kodai Nagano
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Publication number: 20200127290Abstract: A non-aqueous electrolyte secondary battery is capable of suppressing a reduction in the binding strength of a negative electrode active material layer by optimizing conditions for the suppression of gas generation and moisture removal when an aqueous binder and a thickening agent are used in the negative electrode active material layer. A negative electrode for the non-aqueous electrolyte secondary battery includes a negative electrode active material, an aqueous binder and a thickening agent having a hydroxyl group and an ester group. The content of the aqueous binder is 1 to 3% by mass relative to the total amount of the negative electrode active material layer, the content of the thickening agent is 0.5 to 1.5% by mass relative to the total amount of the negative electrode active material layer. The layer satisfies 0.10?X?1.00, X being a ratio of a peak intensity of an infrared absorption spectrum.Type: ApplicationFiled: December 20, 2019Publication date: April 23, 2020Inventors: Takeshi Miyamoto, Ikuma Matsuzaki, Takashi Honda, Kousuke Hagiyama
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Patent number: 10529981Abstract: A roll electrode is provided with a core, an electrode, a fixing part and a regulating part. The core extends in an axial direction and has an outer circumference that is substantially circular. The electrode has an expansion coefficient lower than that of the core. The electrode wound into a roll shape on the outer circumference of the core. The fixing part is provided for fixing an end portion from which the electrode starts being wound around the core. The regulating part is provided for regulating the axial movement of the electrode wound into the roll shape with respect to the core.Type: GrantFiled: July 15, 2015Date of Patent: January 7, 2020Assignee: Envision AESC Japan Ltd.Inventors: Masanobu Sato, Tsuyoshi Kudo, Ikuma Matsuzaki, Yusuke Sasaki, Kazuki Miyatake, Kenta Uwai, Yuta Sadakata, Shigeo Komatsu, Fumihiro Miki
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Patent number: 10468651Abstract: A non-aqueous electrolyte secondary battery has improved battery cycle durability and suppresses internal short-circuits. The non-aqueous electrolyte secondary battery includes a power generating element having a positive electrode, a negative electrode, and a separator including a resin film having a three-layer structure, a ratio of a rated capacity to a pore volume of a positive electrode active material layer being 2.08 Ah/cc or more, a ratio of a battery area to a rated capacity being 7 cm2/Ah or more, and a rated capacity being 50 Ah or more, in which a value R represented by Formula 1 is 62 to 110: R = Tortuosity ? ? factor × Thickness ? [ µm ] Porosity ( Formula ? ? 1 ) provided that, the average pore diameter is 0.10 to 0.18 ?m, the porosity is 0.43 to 0.65, the air permeability is 140 to 305 sec/100 ml, and the thickness is 11 to 25 ?m.Type: GrantFiled: August 10, 2016Date of Patent: November 5, 2019Assignee: Envision AESC Japan Ltd.Inventors: Masato Ono, Ikuma Matsuzaki, Keisuke Matsumoto
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Publication number: 20190173070Abstract: A non-aqueous electrolyte secondary battery has improved battery cycle durability and suppresses internal short-circuits. The non-aqueous electrolyte secondary battery includes a power generating element having a positive electrode, a negative electrode, and a separator including a resin film having a three-layer structure, a ratio of a rated capacity to a pore volume of a positive electrode active material layer being 2.08 Ah/cc or more, a ratio of a battery area to a rated capacity being 7 cm2/Ah or more, and a rated capacity being 50 Ah or more, in which a value R represented by Formula 1 is 62 to 110: R = Tortuosity ? ? factor × Thickness ? [ µm ] Porosity ( Formula ? ? 1 ) provided that, the average pore diameter is 0.10 to 0.18 ?m, the porosity is 0.43 to 0.65, the air permeability is 140 to 305 sec/100 ml, and the thickness is 11 to 25 ?m.Type: ApplicationFiled: August 10, 2016Publication date: June 6, 2019Inventors: Masato Ono, Ikuma Matsuzaki, Keisuke Matsumoto
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Patent number: 10263288Abstract: A production method is provided for producing a lithium ion secondary battery. The lithium ion secondary battery has an external casing that houses an electrolytic solution and a power generating element. The power generating element includes a positive electrode and a negative electrode layered with a separator. The production method includes first charging the lithium ion secondary battery at a voltage range of 4.0 V or lower and then opening the external casing of the lithium ion secondary battery that has been charged at a range of 4.0 V or lower to discharge gas inside the lithium ion secondary battery to the exterior. Next, the production method further includes re-sealing the external casing and charging the lithium ion secondary battery from which the gas has been discharged until the cell voltage is greater than 4.0 V.Type: GrantFiled: February 16, 2015Date of Patent: April 16, 2019Assignee: Nissan Motor Co., Ltd.Inventors: Kenta Uwai, Kazuki Miyatake, Ikuma Matsuzaki, Masanobu Sato, Yusuke Sasaki
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Publication number: 20190067683Abstract: A roll electrode is provided with a core, an electrode, a fixing part and a regulating part. The core extends in an axial direction and has a substantially circular outer circumference. The electrode has an expansion coefficient lower than that of the core. The electrode wound into a roll shape on the outer circumference of the core. The fixing part is fixed to an end portion from which the electrode starts being wound around the core. The regulating part regulates the axial movement of the electrode wound into the roll shape with respect to the core.Type: ApplicationFiled: October 29, 2018Publication date: February 28, 2019Inventors: Masanobu SATO, Tsuyoshi KUDO, Ikuma MATSUZAKI, Yusuke SASAKI, Kazuki MIYATAKE, Kenta UWAI, Yuta SADAKATA, Shigeo KOMATSU, Fumihiro MIKI
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Patent number: 10044071Abstract: The present invention provides a non-aqueous electrolyte secondary battery with various improved battery characteristics and a method for manufacturing such a non-aqueous electrolyte secondary battery. In the present invention, the battery manufacturing method includes accommodating and sealing a flat battery element (4) in which a positive electrode plate (41) and a negative electrode plate (42) stacked together via a separator (43), together with a non-aqueous electrolyte including a surplus electrolyte and at least one kind of electrolyte additive, in a laminate film exterior member (5), and then, subjecting the thus-assembled battery (1) to charging operation including at least initial charging in a state where a pressure is applied to a flat surface of the battery element from the outside of the exterior member (5).Type: GrantFiled: June 9, 2014Date of Patent: August 7, 2018Assignees: AUTOMOTIVE ENERGY SUPPLY CORPORATION, NISSAN MOTOR CO., LTD.Inventors: Sayaka Yonehara, Keisuke Matsumoto, Takashi Honda, Kousuke Hagiyama, Fumihiro Kawamura, Osamu Shimamura, Kazuki Miyatake, Ikuma Matsuzaki, Ryuuta Yamaguchi, Kuniharu Nomoto
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Publication number: 20180212230Abstract: A roll electrode is provided with a core, an electrode, a fixing part and a regulating part. The core extends in an axial direction and has an outer circumference that is substantially circular. The electrode has an expansion coefficient lower than that of the core. The electrode wound into a roll shape on the outer circumference of the core. The fixing part is provided for fixing an end portion from which the electrode starts being wound around the core. The regulating part is provided for regulating the axial movement of the electrode wound into the roll shape with respect to the core.Type: ApplicationFiled: July 15, 2015Publication date: July 26, 2018Inventors: Masanobu SATO, Tsuyoshi KUDO, Ikuma MATSUZAKI, Yusuke SASAKI, Kazuki MIYATAKE, Kenta UWAI, Yuta SADAKATA, Shigeo KOMATSU, Fumihiro MIKI
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Patent number: 9966605Abstract: A non-aqueous electrolyte secondary battery can efficiently discharge the gas generated to the outside of the electrode and exhibits a low decrease in battery capacity even when used for a long period of time in the case of using an aqueous binder as the binder of a negative electrode active material. The non-aqueous electrolyte secondary battery has a positive electrode active material layer is formed on a surface of a positive electrode current collector, a negative electrode active material layer is formed on a surface of a negative electrode current collector, and a separator, wherein the density of the negative electrode active material layer is from 1.3 to 1.6 g/cm3, the negative electrode active material layer contains an aqueous binder, and the surface center line average roughness (Ra) of a surface on a separator side of the negative electrode active material layer is from 0.5 to 1.0 ?m.Type: GrantFiled: March 26, 2014Date of Patent: May 8, 2018Assignees: Nissan Motor Co., Ltd., Automotive Energy Supply CorporationInventors: Ryuuta Yamaguchi, Takashi Honda, Kousuke Hagiyama, Ikuma Matsuzaki, Takeshi Miyamoto, Osamu Shimamura, Keisuke Matsumoto
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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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Publication number: 20180040911Abstract: A method for producing a lithium ion secondary battery in which a positive electrode, a heat-resistant insulating layer provided separator having a heat-resistant insulating layer formed of oxide particles on one surface of a resin porous substrate, and a negative electrode are laminated on one another, and a nonaqueous electrolyte is impregnated in the heat-resistant insulating layer provided separator, includes drying the heat-resistant insulating layer provided separator before laminating so that the water content in the heat-resistant insulating layer provided separator remains in a predetermined range. In the drying, the water content in the heat-resistant insulating layer provided separator is decreased to the predetermined range by controlling the dew point and maintaining the predetermined range after reaching the predetermined range of water content.Type: ApplicationFiled: March 19, 2015Publication date: February 8, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Ikuma MATSUZAKI, Kazuki MIYATAKE, Keisuke MATSUMOTO, Kodai NAGANO
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Publication number: 20180034097Abstract: A production method is provided for producing a lithium ion secondary battery. The lithium ion secondary battery has an external casing that houses an electrolytic solution and a power generating element. The power generating element includes a positive electrode and a negative electrode layered with a separator. The production method includes first charging the lithium ion secondary battery at a voltage range of 4.0 V or lower and then opening the external casing of the lithium ion secondary battery that has been charged at a range of 4.0 V or lower to discharge gas inside the lithium ion secondary battery to the exterior. Next, the production method further includes re-sealing the external casing and charging the lithium ion secondary battery from which the gas has been discharged until the cell voltage is greater than 4.0 V.Type: ApplicationFiled: February 16, 2015Publication date: February 1, 2018Inventors: Kenta UWAI, Kazuki MIYATAKE, Ikuma MATSUZAKI, Masanobu SATO, Yusuke SASAKI
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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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Publication number: 20160218398Abstract: The present invention provides a non-aqueous electrolyte secondary battery with various improved battery characteristics and a method for manufacturing such a non-aqueous electrolyte secondary battery. In the present invention, the battery manufacturing method includes accommodating and sealing a flat battery element (4) in which a positive electrode plate (41) and a negative electrode plate (42) stacked together via a separator (43), together with a non-aqueous electrolyte including a surplus electrolyte and at least one kind of electrolyte additive, in a laminate film exterior member (5), and then, subjecting the thus-assembled battery (1) to charging operation including at least initial charging in a state where a pressure is applied to a flat surface of the battery element from the outside of the exterior member (5).Type: ApplicationFiled: June 9, 2014Publication date: July 28, 2016Applicants: Automotive Energy Supply Corporation, NISSAN MOTOR CO., LTD.Inventors: Sayaka YONEHARA, Keisuke MATSUMOTO, Takashi HONDA, Kousuke HAGIYAMA, Fumihiro KAWAMURA, Osamu SHIMAMURA, Kazuki MIYATAKE, Ikuma MATSUZAKI, Ryuuta YAMAGUCHI, Kuniharu NOMOTO
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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: 20160064715Abstract: A non-aqueous electrolyte secondary battery can efficiently discharge a gas generated to the outside of an electrode and exhibits a low decrease in battery capacity even when used for a long period of time in the case of using an aqueous binder as a binder of a negative electrode active material. The non-aqueous electrolyte secondary battery includes a negative electrode active material layer on the surface of a negative electrode current collector, in which the negative electrode active material layer contains an aqueous binder, a highly porous layer having a porosity that is higher than that of the separator is provided between the negative electrode active material layer and the separator, the porosity of the highly porous layer being from 50 to 90%, and a ratio of a thickness of the highly porous layer to a thickness of the negative electrode active material layer being from 0.01 to 0.4.Type: ApplicationFiled: March 26, 2014Publication date: March 3, 2016Applicants: NISSAN MOTOR CO., LTD., AUTOMOTIVE ENERGY SUPPLY CORPORATIONInventors: Takashi HONDA, Kousuke HAGIYAMA, Ryuuta YAMAGUCHI, Ikuma MATSUZAKI, Norikazu MINEO, Osamu SHIMAMURA, Keisuke MATSUMOTO
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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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Publication number: 20160056468Abstract: A non-aqueous electrolyte secondary battery is capable of suppressing a reduction in the binding strength of a negative electrode active material layer by optimizing conditions for the suppression of gas generation and moisture removal when an aqueous binder and a thickening agent are used in the negative electrode active material layer. A negative electrode for the non-aqueous electrolyte secondary battery includes a negative electrode active material, an aqueous binder and a thickening agent having a hydroxyl group and an ester group. The content of the aqueous binder is 1 to 3% by mass relative to the total amount of the negative electrode active material layer, the content of the thickening agent is 0.5 to 1.5% by mass relative to the total amount of the negative electrode active material layer. The layer satisfies 0.10?X?1.00, X being a ratio of a peak intensity of an infrared absorption spectrum.Type: ApplicationFiled: March 26, 2014Publication date: February 25, 2016Inventors: Takeshi MIYAMOTO, Ikuma MATSUZAKI, Takashi HONDA, Kousuke HAGIYAMA