Patents by Inventor Noriko Kabuto

Noriko Kabuto 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).

  • Manufacturing method of a separator for a lithium secondary battery and an organic electrolyte lithium secondary battery using the same separator
    Patent number: 5691005
    Abstract: An organic electrolyte lithium secondary battery wherein lithium is an active material. The battery comprises a negative electrode made of metallic lithium or a lithium alloy and a separator made of a microporous polyolefin separator matrix whose pores are filled with an ionic conductive gel electrolyte. The separator is in the form of a sheet with at least one face contacting the negative electrode having a gel electrolyte layer. The gel electrolyte is formed by ultraviolet irradiation of a solution having a major component being a mixture of an oligomer and a monomer added to an organic electrolyte. Using the separator in an organic electrolyte lithium secondary battery internal short circuiting of the battery due to dendridic lithium growing on a negative electrode during the charging cycle can be prevented and a longer cycle life achieved.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: November 25, 1997
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenichi Morigaki, Noriko Kabuto, Kazunori Haraguchi
  • Manufacturing method of a separator for a lithium secondary battery and an organic electrolyte lithium secondary battery using the same separator
    Patent number: 5597659
    Abstract: An organic electrolyte lithium secondary battery wherein lithium is an active material. The battery comprises a negative electrode made of metallic lithium or a lithium alloy and a separator made of a microporous polyolefin separator matrix whose pores are filled with an ionic conductive gel electrolyte. The separator is in the form of a sheet with at least one face contacting the negative electrode having a gel electrolyte layer. The gel electrolyte is formed by ultraviolet irradiation of a solution having a major component being a mixture of an oligomer and a monomer added to an organic electrolyte. Using the separator in an organic electrolyte lithium secondary battery internal short circuiting of the battery due to dendridic lithium growing on a negative electrode during the charging cycle can be prevented and a longer cycle life achieved.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: January 28, 1997
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenichi Morigaki, Noriko Kabuto, Kazunori Haraguchi