Patents by Inventor Mitsuru Funaki

Mitsuru Funaki 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).

  • Battery and method for manufacturing spiral electrode group for use therein
    Patent number: 7501201
    Abstract: A wound electrode group includes an electrode stack that is formed by laminating a strip of positive electrode plate, a strip of negative electrode plate, and a pair of separators interposed therebetween. When the electrode stack is wound, a difference L in length between an inner turn and an adjacent outer turn satisfies L=2t?+(W×k), where t is a thickness of the electrode stack, W is a maximum diameter of a cross section of the wound electrode group, and k is a coefficient that is preset in accordance with expansion coefficients of active materials of the positive and negative electrode plates and is within a range from 0.005 to 0.05.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: March 10, 2009
    Assignee: Panasonic Corporation
    Inventors: Teruhisa Ishikawa, Yoshiki Osawa, Mitsuru Funaki, Tomonori Nakaguchi, Junya Nishimori
  • Battery and method for manufacturing spiral electrode group for use therein
    Publication number: 20050123824
    Abstract: A wound electrode group includes an electrode stack that is formed by laminating a strip of positive electrode plate, a strip of negative electrode plate, and a pair of separators interposed therebetween. When the electrode stack is wound, a difference L in length between an inner turn and an adjacent outer turn satisfies L=2t?+(W×k), where t is a thickness of the electrode stack, W is a maximum diameter of a cross section of the wound electrode group, and k is a coefficient that is preset in accordance with expansion coefficients of active materials of the positive and negative electrode plates and is within a range from 0.005 to 0.05.
    Type: Application
    Filed: March 11, 2003
    Publication date: June 9, 2005
    Inventors: Teruhisa Ishikawa, Yoshiki Osawa, Mitsuru Funaki, Tomonori Nakaguchi, Junya Nishimori