Patents by Inventor Tomohiro KAWAI
Tomohiro KAWAI 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: 20240120605Abstract: A partition member, which separates objects to be separated from each other, includes a porous sheet, and a water absorbing material provided at least either on a surface of the porous sheet or inside the porous sheet. The partition member that has dimensions of 100 mm×60 mm and has been stored for 24 hours at a temperature of 25° C., a humidity of 40%, and an atmospheric pressure of 1 atm is used as a sample, and a ratio of a water absorption volume when a portion of 10 mm from an lower end of a 60 mm side of the sample is immersed in water for 2 minutes, to a volume of the sample {the water absorption volume (cm3) divided by a volume (cm3) of the partition member} is in a range of 0.1 to 0.9.Type: ApplicationFiled: December 21, 2023Publication date: April 11, 2024Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Tomohiro KAWAI, Kei HASHIMOTO
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Patent number: 11936067Abstract: An alkaline battery separator containing an alkali resistant fiber and a binder, wherein the alkaline battery separator has two surfaces which are a surface A that is smoother comparing with the other surface and has an arithmetic mean surface roughness Ra (A), and a surface B that is rougher and has an arithmetic mean surface roughness Ra (B), the amount of the binder is 5 to 20% by mass based on the total mass of the separator, a value obtained by dividing the arithmetic mean surface roughness Ra (A) by the arithmetic mean surface roughness Ra (B) [Ra (A)/Ra (B)] is 0.700 or more and 0.980 or less, and the arithmetic mean surface roughness Ra (B) of the surface B is 3.0 ?m or more and 10 ?m or less.Type: GrantFiled: December 13, 2019Date of Patent: March 19, 2024Assignee: KURARAY CO., LTD.Inventors: Tomohiro Hayakawa, Haruna Mitsumori, Toshimichi Kusunoki, Hiroyuki Kawai
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Patent number: 11929478Abstract: A filling member is interposed between pouch cells of a battery pack, the filling member has a first surface orthogonal to a thickness direction thereof and a second surface opposite to the first surface, ?d1 and ?d2 defined below satisfy formulas (1) and (2) below, respectively, ?p satisfies formula (3) below, and ?d1>?d2 holds: (1) ?d1?3.0×10?3 (m2·K)/W, (2) ?d2?8.0×10?3 (m2·K)/W, (3) 0.5 K/W??p1?1000 K/W, and (4) 0.5 K/W??p2?1000 K/W. ?d1 is heat transfer resistance when the average temperature of one of the first and second surfaces exceeds 180° C., ?d2 is heat transfer resistance when the average temperatures of the first and second surfaces both do not exceed 80° C., ?p1 is heat transfer resistance when the average temperature exceeds 180° C., ?p2 is heat transfer resistance when the average temperatures do not exceed 80° C.Type: GrantFiled: February 2, 2021Date of Patent: March 12, 2024Assignee: Mitsubishi Chemical CorporationInventors: Tomohiro Kawai, Hiroki Hayami
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Patent number: 11926312Abstract: In a case where a predetermined switching operation to a state in which a traveling position is selected from a state in which another shift position of a mechanical transmission device is selected is performed by a driver, a quick engagement command to quickly engage a predetermined engagement device is performed in a state in which output of a predetermined torque is stopped, and then a rapid garage control of increasing a rotation speed of an electric motor at a rotation speed equal to or higher than a predetermined rotation speed is executed. The rapid garage control is executed in a case where a predetermined start condition is established.Type: GrantFiled: February 17, 2022Date of Patent: March 12, 2024Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshio Hasegawa, Tomohiro Chimbe, Shogo Kawai
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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 -
Patent number: 11901535Abstract: A partition member which partitions between a pair of unit batteries or a partition member which partitions between a unit battery and a member other than the unit battery, the thermal resistances ?d1, ?d2, ?p1, and ?p2 of the partition member satisfy (?p1/?p2)/(?d1/?d2)?1.0×10?4.Type: GrantFiled: May 29, 2020Date of Patent: February 13, 2024Assignee: Mitsubishi Chemical CorporationInventors: Yoko Watanabe, Tomohiro Kawai
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Publication number: 20230417620Abstract: The gas permeation amount of each of a plurality of rubber sealing components manufactured according to the same specifications is measured by helium leak testing, and for each sealing component, sample data is acquired which is formed of a pair of a measurement value at a criterion time CT in an unstable period A, during which the permeation amount increases, and a measurement value in a stable period B, during which the permeation amount is stable (sample acquisition). The relationship between the measurement value at the criterion time CT and the measurement value in the stable period is defined by a linear function on the basis of the plurality of acquired sample data (function definition).Type: ApplicationFiled: December 15, 2021Publication date: December 28, 2023Inventors: Tatsuya SAITO, Tomohiro KAWAI
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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: 20230335850Abstract: Provided is a battery pack in which cells and a separation member that separates the cells are stacked, wherein the separation member has a heat insulating portion, a compression modulus of the heat insulating portion in stacking direction is 0.5 to 10 MPa, and the separation member has a noncontact region in which the heat insulating portion is not in contact with the cells. A battery pack in which contact between adjacent cells due to expansion of cells is prevented and the safety of the battery pack can be maintained can be provided.Type: ApplicationFiled: June 20, 2023Publication date: October 19, 2023Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Naoya NINOMIYA, Tomohiro Kawai
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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: 20210159559Abstract: A filling member to be interposed between pouch cells of a battery pack, the filling member having a first surface orthogonal to a thickness direction thereof and a second surface opposite to the first surface, wherein ?d1 and ?d2 defined below satisfy formulas (1) and (2) below, respectively, wherein ?p satisfies formula (3) below, and wherein ?d1>?d2 holds: ?d1?3.0×10?3 (m2·K)/W,??(1) ?d2?8.0×10?3 (m2·K)/W,??(2) 0.5 K/W??p1?1000 K/W,??(3) 0.5 K/W??p2?1000 K/W,??(4) ?d1: a heat transfer resistance per unit area in the thickness direction when the average temperature of one of the first and second surfaces exceeds 180° C., ?d2: a heat transfer resistance per unit area in the thickness direction when the average temperatures of the first and second surfaces both do not exceed 80° C., ?p1: a heat transfer resistance in a plane direction when the average temperature of one of the first and second surfaces exceeds 180° C.Type: ApplicationFiled: February 2, 2021Publication date: May 27, 2021Applicant: Mitsubishi Chemical CorporationInventors: Tomohiro KAWAI, Hiroki HAYAMI
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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: 20200295416Abstract: A partition member which partitions between a pair of unit batteries or a partition member which partitions between a unit battery and a member other than the unit battery, the thermal resistances ?d1, ?d2, ?p1, and ?p2 defined as follows satisfy Expression below. (?p1/?p2)/(?d1/?d2)?1.Type: ApplicationFiled: May 29, 2020Publication date: September 17, 2020Applicant: Mitsubishi Chemical CorporationInventors: Yoko WATANABE, Tomohiro KAWAI
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Publication number: 20200287256Abstract: A partition member includes an encapsulated body capable of retaining a liquid and an outer package body having an internal space for accommodating the liquid and the encapsulated body in a sealed state. The ratio of a water absorption rate 2 to a water absorption rate 1, [water absorption rate 2]/[water absorption rate 1], is at least 0.4. The water absorption rate 1 indicates the water absorption rate when the encapsulated body is compressed for 1 minute at a pressure of 0.05 kgf/cm2, and the water absorption rate 2 indicates the water absorption rate when the encapsulated body is compressed for 1 minute at a pressure of 5 kgf/cm2.Type: ApplicationFiled: May 26, 2020Publication date: September 10, 2020Applicant: Mitsubishi Chemical CorporationInventors: Tatsuhiko HONDA, Tomohiro KAWAI, Naoto MARU
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Publication number: 20200058972Abstract: 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: September 16, 2019Publication date: February 20, 2020Applicant: Mitsubishi Chemical CorporationInventors: Tomohiro Kawai, Yoko Watanabe, lwao Soga
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PARTITION MEMBER, ASSEMBLED BATTERY AND METHOD FOR CONTROLLING HEAT TRANSFER IN AN ASSEMBLED BATTERY
Publication number: 20190319223Abstract: 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: June 26, 2019Publication date: October 17, 2019Applicant: Mitsubishi Chemical CorporationInventors: Yoko WATANABE, Tomohiro KAWAI, lwao SOGA