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).

  • Publication number: 20240120605
    Abstract: 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: Application
    Filed: December 21, 2023
    Publication date: April 11, 2024
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Tomohiro KAWAI, Kei HASHIMOTO
  • Patent number: 11936067
    Abstract: 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: Grant
    Filed: December 13, 2019
    Date of Patent: March 19, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Tomohiro Hayakawa, Haruna Mitsumori, Toshimichi Kusunoki, Hiroyuki Kawai
  • Patent number: 11929478
    Abstract: 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: Grant
    Filed: February 2, 2021
    Date of Patent: March 12, 2024
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Tomohiro Kawai, Hiroki Hayami
  • Patent number: 11926312
    Abstract: 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: Grant
    Filed: February 17, 2022
    Date of Patent: March 12, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshio Hasegawa, Tomohiro Chimbe, Shogo Kawai
  • Publication number: 20240072325
    Abstract: 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: Application
    Filed: November 2, 2023
    Publication date: February 29, 2024
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Yoko WATANABE, Tomohiro KAWAI, Iwao SOGA
  • Patent number: 11901535
    Abstract: 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: Grant
    Filed: May 29, 2020
    Date of Patent: February 13, 2024
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yoko Watanabe, Tomohiro Kawai
  • Publication number: 20230417620
    Abstract: 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: Application
    Filed: December 15, 2021
    Publication date: December 28, 2023
    Inventors: Tatsuya SAITO, Tomohiro KAWAI
  • Patent number: 11837705
    Abstract: 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: Grant
    Filed: March 25, 2022
    Date of Patent: December 5, 2023
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yoko Watanabe, Tomohiro Kawai, Iwao Soga
  • Publication number: 20230335850
    Abstract: 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: Application
    Filed: June 20, 2023
    Publication date: October 19, 2023
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Naoya NINOMIYA, Tomohiro Kawai
  • Publication number: 20230231226
    Abstract: 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: Application
    Filed: March 13, 2023
    Publication date: July 20, 2023
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Tomohiro KAWAI, Yoko WATANABE, Iwao SOGA
  • Patent number: 11626635
    Abstract: 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: Grant
    Filed: September 16, 2019
    Date of Patent: April 11, 2023
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Tomohiro Kawai, Yoko Watanabe, Iwao Soga
  • Patent number: 11515590
    Abstract: 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: Grant
    Filed: May 28, 2020
    Date of Patent: November 29, 2022
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Tatsuhiko Honda, Naoto Maru, Tomohiro Kawai, Iwao Soga
  • Publication number: 20220223946
    Abstract: 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: Application
    Filed: March 25, 2022
    Publication date: July 14, 2022
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Yoko WATANABE, Tomohiro KAWAI, Iwao SOGA
  • Publication number: 20210159559
    Abstract: 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: Application
    Filed: February 2, 2021
    Publication date: May 27, 2021
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Tomohiro KAWAI, Hiroki HAYAMI
  • Publication number: 20200295415
    Abstract: 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: Application
    Filed: May 28, 2020
    Publication date: September 17, 2020
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Tatsuhiko HONDA, Naoto MARU, Tomohiro KAWAI, Iwao SOGA
  • Publication number: 20200295416
    Abstract: 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: Application
    Filed: May 29, 2020
    Publication date: September 17, 2020
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Yoko WATANABE, Tomohiro KAWAI
  • Publication number: 20200287256
    Abstract: 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: Application
    Filed: May 26, 2020
    Publication date: September 10, 2020
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Tatsuhiko HONDA, Tomohiro KAWAI, Naoto MARU
  • Publication number: 20200058972
    Abstract: 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: Application
    Filed: September 16, 2019
    Publication date: February 20, 2020
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Tomohiro Kawai, Yoko Watanabe, lwao Soga
  • Publication number: 20190319223
    Abstract: 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: Application
    Filed: June 26, 2019
    Publication date: October 17, 2019
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Yoko WATANABE, Tomohiro KAWAI, lwao SOGA