Patents by Inventor Kohei Masai

Kohei Masai 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).

  • Patent number: 11817577
    Abstract: The present disclosure relates to a secondary battery module including a nonaqueous electrolyte secondary battery and an elastic body. The elastic body has a compressive elastic modulus of 5 MPa to 120 MPa. The nonaqueous electrolyte secondary battery includes a positive electrode and a negative electrode. The positive electrode includes a positive electrode collector containing Ti as a main component and having a thickness of 1 ?m to 8 ?m. The negative electrode includes a first layer and a second layer sequentially formed from a side with the negative electrode collector. The first layer contains negative electrode active material particles containing first carbon-based active material particles with a 10% proof stress of 3 MPa or less. The second layer contains negative electrode active material particles containing second carbon-based active material particles with a 10% proof stress of 5 MPa or greater.
    Type: Grant
    Filed: March 12, 2021
    Date of Patent: November 14, 2023
    Assignees: PANASONIC HOLDINGS CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasunori Baba, Harunari Shimamura, Keisuke Ohara, Kohei Masai, Kouhei Tsuzuki, Katsunori Yanagida, Yo Kato
  • Publication number: 20220216474
    Abstract: This negative electrode for non-aqueous electrolyte secondary batteries comprises a negative electrode core and a negative electrode mixture layer provided on the surface of the negative electrode core and including a negative electrode active substance. The negative electrode mixture layer has: a first layer including substantially only graphite having a BET specific surface area of 0.5-2.5 m2/g, as a negative electrode active substance; and a second layer including substantially only at least either an element that alloys with lithium or a compound containing said element, as a negative electrode active substance.
    Type: Application
    Filed: April 8, 2020
    Publication date: July 7, 2022
    Applicant: Panasonic Corporation
    Inventors: Yuji Yokoyama, Kouhei Tsuzuki, Kohei Masai
  • Publication number: 20210296639
    Abstract: The present disclosure relates to a secondary battery module including a nonaqueous electrolyte secondary battery and an elastic body. The elastic body has a compressive elastic modulus of 5 MPa to 120 MPa. The nonaqueous electrolyte secondary battery includes a positive electrode and a negative electrode. The positive electrode includes a positive electrode collector containing Ti as a main component and having a thickness of 1 ?m to 8 ?m. The negative electrode includes a first layer and a second layer sequentially formed from a side with the negative electrode collector. The first layer contains negative electrode active material particles containing first carbon-based active material particles with a 10% proof stress of 3 MPa or less. The second layer contains negative electrode active material particles containing second carbon-based active material particles with a 10% proof stress of 5 MPa or greater.
    Type: Application
    Filed: March 12, 2021
    Publication date: September 23, 2021
    Applicants: Panasonic Corporation, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasunori Baba, Harunari Shimamura, Keisuke Ohara, Kohei Masai, Kouhei Tsuzuki, Katsunori Yanagida, Yo Kato