Patents by Inventor Iwao Soga
Iwao Soga 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: 11936044Abstract: A carbon material for a non-aqueous secondary battery containing a graphite capable of occluding and releasing lithium ions, and having a cumulative pore volume at pore diameters in a range of 0.01 ?m to 1 ?m of 0.08 mL/g or more, a roundness, as determined by flow-type particle image analysis, of 0.88 or greater, and a pore diameter to particle diameter ratio (PD/d50 (%)) of 1.8 or less, the ratio being given by equation (1A): PD/d50 (%)=mode pore diameter (PD) in a pore diameter range of 0.01 ?m to 1 ?m in a pore distribution determined by mercury intrusion/volume-based average particle diameter (d50)×100 is provided.Type: GrantFiled: January 5, 2017Date of Patent: March 19, 2024Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Shunsuke Yamada, Nobuyuki Ishiwatari, Satoshi Akasaka, Daigo Nagayama, Shingo Morokuma, Koichi Nishio, Iwao Soga, Hideaki Tanaka, Takashi Kameda, Tooru Fuse, Hiromitsu Ikeda
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PARTITION MEMBER, ASSEMBLED BATTERY AND METHOD FOR CONTROLLING HEAT TRANSFER IN AN ASSEMBLED BATTERY
Publication number: 20240072325Abstract: A partition member has two surfaces in a thickness direction, and separates single cells that make up an assembled battery. When the average temperature of one of the two surfaces exceeds 180° C., a thermal resistance per unit area (?1) in the thickness direction satisfies Expression 1 below, and when the average temperatures of both of the two surfaces do not exceed 80° C., a thermal resistance per unit area (?2) in the thickness direction satisfies Expression 2 below. ?1?5.0×10?3(m2·K/W)??(Expression 1), and ?2?4.0×10?3(m2·K/W)??(Expression 2).Type: ApplicationFiled: November 2, 2023Publication date: February 29, 2024Applicant: Mitsubishi Chemical CorporationInventors: Yoko WATANABE, Tomohiro KAWAI, Iwao SOGA -
Partition member, assembled battery and method for controlling heat transfer in an assembled battery
Patent number: 11837705Abstract: A partition member has two surfaces in a thickness direction, and separates single cells that make up an assembled battery. When the average temperature of one of the two surfaces exceeds 180° C., a thermal resistance per unit area (?1) in the thickness direction satisfies Expression 1 below, and when the average temperatures of both of the two surfaces do not exceed 80° C., a thermal resistance per unit area (?2) in the thickness direction satisfies Expression 2 below. ? 1 ? 5. × 10 - 3 ? ( m 2 · K / W ) , and ( Expression ? 1 ) ? 2 ? 4. × 10 - 3 ? ( m 2 · K / W ) ( Expression ? 2 ) .Type: GrantFiled: March 25, 2022Date of Patent: December 5, 2023Assignee: Mitsubishi Chemical CorporationInventors: Yoko Watanabe, Tomohiro Kawai, Iwao Soga -
Publication number: 20230352686Abstract: A method for producing a carbon material may include: granulating a raw carbon material by applying mechanical energy comprising impact, compression, friction, and/or shear force. The granulating may be carried out in the presence of a granulating agent. The granulating agent may be liquid during the granulating of the raw carbon material. Alternatively or in addition, the granulating agent may include no organic solvent, an organic solvent having no flash point, or no organic solvent having a flash point of 5° C. or higher.Type: ApplicationFiled: June 9, 2023Publication date: November 2, 2023Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Shunsuke YAMADA, Nobuyuki ISHIWATARI, Satoshi AKASAKA, Daigo NAGAYAMA, Shingo MOROKUMA, Koichi NISHIO, Iwao SOGA, Hideaki TANAKA, Takashi KAMEDA, Tooru FUSE, Hiromitsu IKEDA
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Publication number: 20230231226Abstract: A partition member has a thickness direction and a surface direction perpendicular to the thickness direction, and which separates single cells that make up an assembled battery in the thickness direction, or a single cell that makes up the assembled battery in the thickness direction and a member other than the single cells. The partition member includes, in the interior thereof, a fluid having a boiling point at normal pressure of 80° C. to 250° C., and a flow channel of the fluid extending along the surface direction. The fluid is held in a fluid holding part, and the fluid holding part is hermetically sealed by a packaging material.Type: ApplicationFiled: March 13, 2023Publication date: July 20, 2023Applicant: Mitsubishi Chemical CorporationInventors: Tomohiro KAWAI, Yoko WATANABE, Iwao SOGA
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Patent number: 11626635Abstract: A partition member has a thickness direction and a surface direction perpendicular to the thickness direction, and which separates single cells that make up an assembled battery in the thickness direction, or a single cell that makes up the assembled battery in the thickness direction and a member other than the single cells. The partition member includes, in the interior thereof, a fluid having a boiling point at normal pressure of 80° C. to 250° C., and a flow channel of the fluid extending along the surface direction. The fluid is held in a fluid holding part, and the fluid holding part is hermetically sealed by a packaging material.Type: GrantFiled: September 16, 2019Date of Patent: April 11, 2023Assignee: Mitsubishi Chemical CorporationInventors: Tomohiro Kawai, Yoko Watanabe, Iwao Soga
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Patent number: 11515590Abstract: A partition member includes an encapsulated body capable of retaining a liquid, and an outer package body for accommodating the encapsulated body and the liquid. The area S1 of the encapsulated body when the outer package body and the encapsulated body are seen in a planar view from the thickness direction and the area S2 of a gap between the outer package body and the encapsulated body satisfy the relationship represented by formula 1 below, and the volume V1 of the liquid and the volume V2 of the encapsulated body satisfy the relationship represented by formula 2 below. S1/(S1+S2)?0.99 and??Formula 1 0.02?V1/V2?1.Type: GrantFiled: May 28, 2020Date of Patent: November 29, 2022Assignee: Mitsubishi Chemical CorporationInventors: Tatsuhiko Honda, Naoto Maru, Tomohiro Kawai, Iwao Soga
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PARTITION MEMBER, ASSEMBLED BATTERY AND METHOD FOR CONTROLLING HEAT TRANSFER IN AN ASSEMBLED BATTERY
Publication number: 20220223946Abstract: A partition member has two surfaces in a thickness direction, and separates single cells that make up an assembled battery. When the average temperature of one of the two surfaces exceeds 180° C., a thermal resistance per unit area (?1) in the thickness direction satisfies Expression 1 below, and when the average temperatures of both of the two surfaces do not exceed 80° C., a thermal resistance per unit area (?2) in the thickness direction satisfies Expression 2 below. ? 1 ? 5.0 × 10 - 3 ? ( m 2 · K / W ) , and ( Expression ? ? 1 ) ? 2 ? 4.0 × 10 - 3 ? ( m 2 · K / W ) .Type: ApplicationFiled: March 25, 2022Publication date: July 14, 2022Applicant: Mitsubishi Chemical CorporationInventors: Yoko WATANABE, Tomohiro KAWAI, Iwao SOGA -
Publication number: 20220123309Abstract: A carbon material may include granulated particles satisfying (1L) and (2L): (1L) the granulated particles are made of a carbonaceous material; and (2L) the granulated particles satisfy the relationship |X1?X|/X1?0.2, wherein X is a volume-based average particle diameter determined by laser diffraction, and X1 is an equivalent circular diameter as determined from a cross-sectional SEM image, provided that the cross-sectional SEM image is a reflected electron image acquired at an acceleration voltage of 10 kV, wherein the carbon material has an average box-counting dimension relative to void regions of 30 particles of 1.55 or greater, as calculated from images obtained by randomly selecting 30 granulated particles from a cross-sectional SEM image of the carbon material, dividing the cross-sectional SEM image of each granulated particle into void regions and non-void regions, and binarizing the image. Such carbon material may be used in electrodes and batteries.Type: ApplicationFiled: December 30, 2021Publication date: April 21, 2022Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Shunsuke YAMADA, Nobuyuki ISHIWATARI, Satoshi AKASAKA, Daigo NAGAYAMA, Shingo MOROKUMA, Koichi NISHIO, Iwao SOGA, Hideaki TANAKA, Takashi KAMEDA, Tooru FUSE, Hiromitsu IKEDA
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Publication number: 20220123308Abstract: A carbon material may satisfying inequality (1K): 10.914 > 5 ? x k - y k - 0.0087 ? a , ( 1 ? K ) wherein a is a volume-based average particle diameter in um of the carbon material, xk is a true density in g/cm3 of the carbon material, and yk is a value determined by equation (2K): y k = D 100 - D T , ( 2 ? K ) wherein D100 is density in g/cm3 of carbon material under uniaxial load of 100 kgf/3.14 cm2, and DT is tap density of carbon material in g/cm3. Such carbon materials may be used in electrodes and batteries.Type: ApplicationFiled: December 30, 2021Publication date: April 21, 2022Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Shunsuke YAMADA, Nobuyuki ISHIWATARI, Satoshi AKASAKA, Daigo NAGAYAMA, Shingo MOROKUMA, Koichi NISHIO, Iwao SOGA, Hideaki TANAKA, Takashi KAMEDA, Tooru FUSE, Hiromitsu IKEDA
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Publication number: 20220123311Abstract: A carbon material may include granulated particles made of a carbonaceous material and satisfying (2L), ? X 1 - X ? / X 1 ? 0.2 , ( 2 ? L ) wherein X is a volume-based average particle diameter determined by laser diffraction, and X1 is an equivalent circular diameter determined from a cross-sectional SEM image, which is a reflected electron image acquired at 10 kV, wherein the carbon material has an average inter-void distance Z of 30 granulated particles randomly selected from a cross-sectional SEM image of the carbon material, as Zave, and wherein the carbon material has volume-based average particle diameter X determined by laser diffraction in a Zave/X ratio of 0.060 or less.Type: ApplicationFiled: December 30, 2021Publication date: April 21, 2022Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Shunsuke YAMADA, Nobuyuki ISHIWATARI, Satoshi AKASAKA, Daigo NAGAYAMA, Shingo MOROKUMA, Koichi NISHIO, Iwao SOGA, Hideaki TANAKA, Takashi KAMEDA, Tooru FUSE, Hiromitsu IKEDA
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Publication number: 20220123310Abstract: A carbon material may include granulated particles made of a carbonaceous material and satisfying (2L): ? X 1 - X ? / X 1 ? 0.2 , ( 2 ? L ) wherein X is a volume-based average particle diameter determined by laser diffraction, and X1 is an equivalent circular diameter determined from a cross-sectional SEM image, which is a reflected electron image acquired at an acceleration voltage of 10 kV, wherein X and X1 are determined from a cross-sectional SEM image, by drawing grid lines to split the minor axis and the major axis of a target granulated particle each into 20 parts to obtain a grid, and using cells in the grid, compartmentalizing the target granulated particle in a compartment.Type: ApplicationFiled: December 30, 2021Publication date: April 21, 2022Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Shunsuke YAMADA, Nobuyuki ISHIWATARI, Satoshi AKASAKA, Daigo NAGAYAMA, Shingo MOROKUMA, Koichi NISHIO, Iwao SOGA, Hideaki TANAKA, Takashi KAMEDA, Tooru FUSE, Hiromitsu IKEDA
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Publication number: 20200295415Abstract: A partition member includes an encapsulated body capable of retaining a liquid, and an outer package body for accommodating the encapsulated body and the liquid. The area S1 of the encapsulated body when the outer package body and the encapsulated body are seen in a planar view from the thickness direction and the area S2 of a gap between the outer package body and the encapsulated body satisfy the relationship represented by formula 1 below, and the volume V1 of the liquid and the volume V2 of the encapsulated body satisfy the relationship represented by formula 2 below. S1/(S1+S2)?0.99 and??Formula 1: 0.02?V1/V2?1.Type: ApplicationFiled: May 28, 2020Publication date: September 17, 2020Applicant: Mitsubishi Chemical CorporationInventors: Tatsuhiko HONDA, Naoto MARU, Tomohiro KAWAI, Iwao SOGA
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Publication number: 20200185721Abstract: Provided is a method to manufacture a composite carbon material capable of obtaining a non-aqueous secondary battery, which has high capacity, initial efficiency, and low charging resistance and is excellent in productivity. As a result thereof, a high-performance non-aqueous secondary battery is stably provided with efficiency. A composite carbon material for a non-aqueous secondary battery is provided, which contains at least a bulk mesophase artificial graphite particle (A) and graphite particle (B) having an aspect ratio of 5 or greater, and which is capable of absorbing and releasing lithium ions. A graphite crystal layered structure of the graphite particle (B) is arranged in the same direction as a direction of an outer peripheral surface of the bulk mesophase artificial graphite particle (A) at a part of a surface of the bulk mesophase artificial graphite particle (A), and an average circularity of the composite carbon material is 0.9 or greater.Type: ApplicationFiled: February 14, 2020Publication date: June 11, 2020Applicant: Mitsubishi Chemical CorporationInventors: Shunsuke YAMADA, Nobuyuki ISHIWATARI, Satoshi AKASAKA, Iwao SOGA, Hideaki TANAKA, Tooru FUSE, Shingo MOROKUMA, Koichi NISHIO
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Publication number: 20180013146Abstract: Provided is a carbon material capable of obtaining a non-aqueous secondary battery, which has high capacity, initial efficiency, and low charging resistance and is excellent in productivity. As a result thereof, a high-performance non-aqueous secondary battery is stably provided with efficiency. A composite carbon material for a non-aqueous secondary battery is provided, which contains at least a bulk mesophase artificial graphite particle (A) and graphite particle (B) having an aspect ratio of 5 or greater, and which is capable of absorbing and releasing lithium ions. A graphite crystal layered structure of the graphite particle (B) is arranged in the same direction as a direction of an outer peripheral surface of the bulk mesophase artificial graphite particle (A) at a part of a surface of the bulk mesophase artificial graphite particle (A), and an average circularity of the composite carbon material is 0.9 or greater.Type: ApplicationFiled: July 14, 2017Publication date: January 11, 2018Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: SHUNSUKE YAMADA, NOBUYUKI ISHIWATARI, SATOSHI AKASAKA, IWAO SOGA, HIDEAKI TANAKA, TOORU FUSE, SHINGO MOROKUMA, KOICHI NISHIO
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Publication number: 20170187041Abstract: A carbon material for a non-aqueous secondary battery containing a graphite capable of occluding and releasing lithium ions, and having a cumulative pore volume at pore diameters in a range of 0.01 ?m to 1 ?m of 0.08 mL/g or more, a roundness, as determined by flow-type particle image analysis, of 0.88 or greater, and a pore diameter to particle diameter ratio (PD/d50 (%)) of 1.8 or less, the ratio being given by equation (1A): PD/d50 (%)=mode pore diameter (PD) in a pore diameter range of 0.01 ?m to 1 ?m in a pore distribution determined by mercury intrusion/volume-based average particle diameter (d50)×100 is provided.Type: ApplicationFiled: January 5, 2017Publication date: June 29, 2017Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Shunsuke YAMADA, Nobuyuki ISHIWATARI, Satoshi AKASAKA, Daigo NAGAYAMA, Shingo MOROKUMA, Koichi NISHIO, Iwao SOGA, Hideaki TANAKA, Takashi KAMEDA, Tooru FUSE, Hiromitsu IKEDA
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Patent number: 7879260Abstract: An object of the invention is to provide such an additive for a lithium secondary battery that improves the battery capacity and the initial efficiency of the lithium secondary battery. In the invention, a fullerene derivative having a group having a formula weight of 6 or more is used as an additive for a lithium secondary battery. A fullerene derivative having a group having a formula weight of 6 or more is contained in an anode material for a lithium secondary battery, an anode for a lithium secondary battery, and a lithium secondary battery using an anode containing the anode material. The group having a formula weight of 6 or more in the fullerene derivative is preferably one selected from the group consisting of an alkali metal atom, a chalcogen atom, a halogen atom, an aliphatic hydrocarbon group, an aromatic hydrocarbon group, a heterocyclic group, a characteristic group containing oxygen, a characteristic group containing sulfur and a characteristic group containing nitrogen.Type: GrantFiled: March 22, 2005Date of Patent: February 1, 2011Assignee: Mitsubishi Chemical CorporationInventors: Toshiya Naruto, Akira Matsumoto, Iwao Soga
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Patent number: 7312002Abstract: To improve an impregnation property of an electrolyte and the cycle characteristics, which have been a problem in the case of employing a casing having a variable shape. A lithium secondary cell comprising a casing having a variable shape, and a cell element having a positive electrode, a negative electrode and an electrolyte, sealed in the casing, wherein a compound represented by following formula (1) is contained in the lithium secondary cell: A1-X-A2??(1) (wherein X is a Group VI element in the periodic table, and A1 and A2 represent an aromatic group, provided that A1 and A2 may be the same or different, and may be connected each other to constitute a ring.Type: GrantFiled: February 2, 2005Date of Patent: December 25, 2007Assignee: Mitsubishi Chemical CorporationInventors: Takayuki Aoshima, Iwao Soga, Mitsuharu Kobayashi
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Publication number: 20050221184Abstract: An object of the invention is to provide such an additive for a lithium secondary battery that improves the battery capacity and the initial efficiency of the lithium secondary battery. In the invention, a fullerene derivative having a group having a formula weight of 6 or more is used as an additive for a lithium secondary battery. A fullerene derivative having a group having a formula weight of 6 or more is contained in an anode material for a lithium secondary battery, an anode for a lithium secondary battery, and a lithium secondary battery using an anode containing the anode material. The group having a formula weight of 6 or more in the fullerene derivative is preferably one selected from the group consisting of an alkali metal atom, a chalcogen atom, a halogen atom, an aliphatic hydrocarbon group, an aromatic hydrocarbon group, a heterocyclic group, a characteristic group containing oxygen, a characteristic group containing sulfur and a characteristic group containing nitrogen.Type: ApplicationFiled: March 22, 2005Publication date: October 6, 2005Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Toshiya Naruto, Akira Matsumoto, Iwao Soga
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Patent number: 6939644Abstract: To increase safety against overcharging of a lithium secondary cell which uses a lithium-nickel compound oxide as a positive electrode active material. A lithium secondary cell comprises a casing (2,3) and a lithium secondary cell element (1) using a lithium-nickel compound oxide as a positive electrode active material, accommodated in the casing. The specific surface area of the lithium-nickel compound oxide is from 0.1 to 10 m2/g, and a surface area capacity ratio S/C, i.e. a ratio of a cell surface area S (cm2) to a cell capacity (mAh), is from 0.05 to 5.Type: GrantFiled: October 14, 2003Date of Patent: September 6, 2005Assignee: Mitsubishi Chemical CorporationInventors: Takayuki Aoshima, Iwao Soga