Patents by Inventor Yukihiro Okada

Yukihiro Okada 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: 7985495
    Abstract: An assembled battery comprises mainly multiple non-aqueous secondary cells A and at least one electric device B for voltage detection containing a non-aqueous electrolyte connected to the multiple non-aqueous secondary cells A in series. When a difference in the non-aqueous secondary cell A between a voltage per cell (VA1) at a depth of discharge of 25% and a voltage per cell (VA2) at a depth of discharge of 75% is designated as ?VA, and a difference in the electric device B between a voltage per cell (VB1) at a depth of discharge equivalent to the depth of discharge of 25% of the non-aqueous secondary cell A and a voltage per cell (VB2) at a depth of discharge equivalent to the depth of discharge of 75% of the non-aqueous secondary cell A is designated as ?VB, the ?VB of electric device B is greater than the ?VA of non-aqueous secondary cell A.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: July 26, 2011
    Assignee: Panasonic Corporation
    Inventors: Yukihiro Okada, Masatoshi Nagayama
  • Publication number: 20110103426
    Abstract: The present invention provides a steel plate quality assurance system and facilities thereof, wherein the steel plate quality assurance system measures, with a steel plate manufacturing line including a finishing mill of a steel plate manufacturing line, and accelerated cooling equipment disposed on the downstream side of the finishing mill in the advancing direction of the steel plate manufacturing line, temperature of at least the whole area of the upper surface of a steel plate, or the whole area of the lower surface of a steel plate to perform quality assurance, and includes temperature measurement means; temperature analysis means; and mechanical property determining means.
    Type: Application
    Filed: March 26, 2009
    Publication date: May 5, 2011
    Inventors: Koji Narihara, Toshikazu Akita, Yukihiro Okada, Yutaka Wada, Kouhei Obara, Toru Takahashi
  • Publication number: 20110091795
    Abstract: A fuel container for storing a fuel liquid for a fuel cell has a double wall structure including an inner container for storing a fuel liquid and an outer container for housing the inner container, and a material capable of retaining the fuel between the inner container and the outer container. A fuel cell pack includes a fuel cell and a fuel container for storing a fuel liquid for the fuel cell. The fuel cell pack includes a double wall exterior casing having an inner casing for housing the fuel cell and the fuel container and an outer casing for housing the inner casing, and a material capable of retaining the fuel between the inner casing and the outer casing.
    Type: Application
    Filed: December 27, 2010
    Publication date: April 21, 2011
    Applicant: PANASONIC CORPORATION
    Inventors: Takashi AKIYAMA, Junji Niikura, Kohji Yuasa, Yukihiro Okada, Satoshi Shibutani, Hideyuki Ueda
  • Patent number: 7910242
    Abstract: In a nonaqueous electrolyte secondary battery in which an electrode plate group including a positive electrode plate and a negative electrode plate which have a positive electrode mixture layer formed on a positive electrode current collector to contain a positive electrode active material and a negative electrode mixture layer formed on a negative electrode current collector to contain a negative electrode active material, respectively, and are spirally wound or stacked with a separator interposed therebetween is encapsulated in a battery exterior packaging body with an electrolyte, the battery exterior packaging body includes a gas releasing valve for releasing gas in the battery exterior packaging body to the outside when a gas pressure in the battery exterior packaging body reaches a working pressure and is formed to be deformable where the gas pressure in the battery exterior packaging body is lower than the working pressure of the gas releasing valve.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: March 22, 2011
    Assignee: Panasonic Corporation
    Inventors: Naoyuki Wada, Hideaki Fujita, Yukihiro Okada, Yoshiyuki Muraoka
  • Publication number: 20110033750
    Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery of the present invention includes composite oxide particles including lithium, nickel, and an element M, the element M being at least one of aluminum and cobalt. The composite oxide particles include primary particles and each particle of the primary particles includes a surface portion and an inner portion. A content of the element M in the surface portion is higher than a content of the element M in the inner portion, and a proportion of the primary particles relative to all of the composite oxide particles is 80 to 100 wt %. According to the invention, a positive electrode active material for a non-aqueous electrolyte secondary battery that has excellent cycle characteristics and storage characteristics and is suitable for use in a wide range of the state of charge and in a high-temperature environment and a non-aqueous electrolyte secondary battery using the same can be obtained.
    Type: Application
    Filed: March 3, 2010
    Publication date: February 10, 2011
    Inventors: Takashi Hosokawa, Yukihiro Okada, Hideaki Fujita, Shinji Arimoto
  • Publication number: 20110027635
    Abstract: The nonaqueous electrolyte secondary battery of the invention includes: a wound-type electrode group including a long positive electrode, a long negative electrode, and a separator disposed between the positive electrode and the negative electrode; a nonaqueous electrolyte; and a prismatic battery case accommodating the electrode group and the nonaqueous electrolyte. A horizontal cross-section of the electrode group has a major axis and a minor axis. The positive electrode includes a positive electrode current collector and a positive electrode active material layer disposed thereon, and the negative electrode includes a negative electrode current collector and a negative electrode active material layer disposed thereon. A tensile strength of the positive electrode when an elongation percentage in a longitudinal direction of the positive electrode is 1% is not greater than 15 N/cm.
    Type: Application
    Filed: March 31, 2009
    Publication date: February 3, 2011
    Inventors: Yoshiyuki Muraoka, Yukihiro Okada
  • Publication number: 20110008661
    Abstract: A lithium ion secondary battery of the invention includes an electrode structure including an electrode group composed of a strip-shaped laminate or winding including a positive electrode in which a positive electrode active material layer is attached to a positive electrode current collector, a negative electrode, and a separator; a positive electrode current collector plate including aluminum foil; and a negative electrode current collector plate electrically connected to the negative electrode. The positive electrode has, at one longitudinally extending end edge of the laminate, a positive electrode current collector-exposed portion protruding beyond the negative electrode.
    Type: Application
    Filed: March 6, 2009
    Publication date: January 13, 2011
    Inventors: Kiyomi Kozuki, Yasushi Hirakawa, Yukihiro Okada, Hideaki Fujita
  • Publication number: 20100316897
    Abstract: A secondary battery has a so-called tabless structure. An electrode group (4) includes an exposed end (1a) and a body portion (5). In the exposed end (1a), a current collector is exposed. In the body portion (5), an active material is provided on a surface of the current collector. A current collector plate (10) includes a principal surface (11) to which the electrode group (4) is connected, and projections (13) provided on the periphery of the principal surface (11). Moreover, in a direction in which a positive electrode plate (1), a porous insulating layer (3) and a negative electrode plate (2) are sequentially arranged, a width of the current collector plate (10) is equal to or smaller than a width of the body portion (5). Furthermore, the projections (13) sandwich the exposed end (1a) in a direction perpendicular to a longitudinal direction of the exposed end (1a).
    Type: Application
    Filed: September 25, 2008
    Publication date: December 16, 2010
    Inventors: Kiyomi Kozuki, Hideaki fujita, Yukihiro Okada, Yasushi Hirakawa
  • Publication number: 20100310938
    Abstract: The present invention mainly relates to non-aqueous electrolyte secondary batteries. The present invention intends to provide a non-aqueous electrolyte secondary battery having excellent cycle characteristics and excellent storage characteristics. The non-aqueous electrolyte secondary battery of the present invention includes a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The positive electrode active material includes secondary particles each being an aggregate of a plurality of primary particles, and the primary particles have an average particle diameter of 0.8 ?m or less. The secondary particles each contain aluminum atoms, and the content of the aluminum atoms is larger in a portion near the surface of each of the secondary particles than in a portion near the center of each of the secondary particles.
    Type: Application
    Filed: March 18, 2009
    Publication date: December 9, 2010
    Inventors: Yukihiro Okada, Hideaki Fujita, Naoyuki Wada, Shigeru Hanaoka, Shinji Arimoto, Takahiro Okuyama
  • Publication number: 20100247991
    Abstract: It is possible to ensure welding of an exposed portion of an electrode core member protruding from one end surface of an electrode group to a desired connection portion of a current collector plate by constituting a battery wherein an end portion of a first electrode is protruding from an end portion of a second electrode and an end portion of a separator on one end surface of an electrode group, the protruding end portion of the first electrode includes an exposed portion of a first electrode core member, the exposed portion of the first electrode core member is welded to a connection portion on one surface of the first current collector plate, and an insulating layer is formed in an area except for a reverse face portion of the connection portion on the other surface of the first current collector plate.
    Type: Application
    Filed: May 8, 2009
    Publication date: September 30, 2010
    Inventors: Takashi Hosokawa, Yukihiro Okada, Kiyomi Kozuki, Hideaki Fujita
  • Patent number: 7794854
    Abstract: Provided is a novel corannulene compound. The corannulene compound is represented by the following general formula (1): where X represents a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted amino group, or a substituted or unsubstituted cyano group, n represents an integer of 1 to 10, and when a number of X is two or more, X may be identical to or different from each other, or may bind to each other to form a ring.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: September 14, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoki Yamada, Kazunori Ueno, Jun Nishimura, Yukihiro Okada
  • Publication number: 20100218365
    Abstract: A process of manufacturing segments, an anisotropic direction of which is continuously changed in a plane vertically by a uniform magnetic field maintained in a constant direction and a process of arranging a plurality of segments on a circumference, extruding the segments in a ring shape by rheology based on the viscous deformation of the segments, from one thrust-direction end surface of the segments, and subsequently compressing the segments from both thrust-direction end surfaces of the segments are necessarily included. A ring magnet, anisotropy of which is controlled in a continuous direction, is provided, and a source for generating a static magnetic field has energy density (BH) max?160 to 180 kJ/m3.
    Type: Application
    Filed: May 20, 2009
    Publication date: September 2, 2010
    Applicant: Panasonic Corporation
    Inventors: Fumitoshi Yamashita, Kiyomi Kawamura, Yukihiro Okada, Hiroshi Murakami
  • Publication number: 20100209749
    Abstract: A battery casing 10 includes a plurality of cylindrical accommodation parts 12a to 12d accommodating a plurality of electrode assemblies 20, and connecting parts 13a to 13c connecting the accommodation parts 12a to 13d adjacent to each other. The inner circumferences of the accommodation parts 12a to 12d have substantially the same shape as the outer circumferences of the electrode assemblies. The connecting parts 13a to 13c are formed along the side surfaces of the accommodation parts 12a to 12d. Each electrode assembly 20 is formed by winding a positive electrode plate 21 and a negative electrode plate 22 with a separator 23 interposed therebetween to be in a cylindrical shape. The plurality of electrode assemblies 20 are accommodated in the accommodation parts 12a to 12d with substantially no gap left.
    Type: Application
    Filed: October 9, 2007
    Publication date: August 19, 2010
    Inventor: Yukihiro Okada
  • Patent number: 7759833
    Abstract: A motor generally has a contradictory relation between decrease of cogging torque and increase of torque density. To overcome this problem, continuous direction control is provided for anisotropy with modification of magnetic poles so that the average absolute value of differences between M? and 90×sin [?{2?/(360/p)}] is set to be 3° or less, where M? is a direction of anisotropy with respect to a radial tangent line of a magnetic pole plane, ? is a mechanical angle, and p is the number of pole pairs.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: July 20, 2010
    Assignee: Panasonic Corporation
    Inventors: Fumitoshi Yamashita, Hiroshi Murakami, Yukihiro Okada, Kiyomi Kawamura
  • Publication number: 20100136429
    Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode (5), a negative electrode (6) and a porous insulation layer (7). The positive electrode (5) includes a positive electrode current collector (51) and a positive electrode mixture layer (52), and the negative electrode (6) includes a negative electrode current collector (61) and a negative electrode active material layer (62). After charging the nonaqueous electrolyte secondary battery, when a surface of the positive electrode mixture layer (52) and a surface of the negative electrode active material layer (62) are brought in contact with each other, terminals are provided, respectively, on the positive electrode current collector (51) and the negative electrode current collector (62) and a resistance value between the terminals is measured, the resistance value is 1.6 ?·cm2 or more.
    Type: Application
    Filed: December 13, 2007
    Publication date: June 3, 2010
    Inventors: Yoshiyuki Muraoka, Hajime Nishino, Yukihiro Okada, Mikinari Shimada, Miyuki Nakai
  • Publication number: 20100112449
    Abstract: In a positive electrode active material layer, 80% by weight or more of the total amount of a positive electrode active material is in the form of primary particles, and a conductive coating layer is provided on the surfaces of the primary particles. This sufficiently suppresses the collapse of the active material itself associated with repeated charge and discharge and the changes in volume of the active material layer associated with the collapse, without the need of increasing the content of conductive agent in the positive electrode active material layer. This particularly prevents part of the positive electrode active material particles from being isolated from the electrically conductive network in the positive electrode active material.
    Type: Application
    Filed: March 3, 2008
    Publication date: May 6, 2010
    Inventors: Hideaki Fujita, Yukihiro Okada
  • Publication number: 20100066192
    Abstract: In a radial-direction gap type magnet motor, when an energy density increases, a direction change M?/?p of a static magnetic field with respect to a mechanic angle between different poles increases in an exponential manner and thus to decrease a cogging torque of the motor is not compatible to increase a torque density. In order to solve the problem, assuming that ?t denotes a mechanic angle of a stator iron core teeth, ?p denotes a mechanical angle of a magnetic pole, and M? denotes an angle of a static magnetic field with respect to a circumferential tangential line of a radial magnetic pole center, a radial-direction type magnet motor in which ?t<?p, M? in a magnetic pole center region is 75 to 90°, and M?/?p?7 is satisfied in the magnetic pole end region of ?p×0.1°, and further, a static magnetic field generating source is configured as a magnetic anisotropic magnetic pole having an energy density (BH) max?150 kJ/m3 is provided.
    Type: Application
    Filed: November 15, 2007
    Publication date: March 18, 2010
    Applicant: Panasonic Corporation
    Inventors: Fumitoshi Yamashita, Hiroshi Murakami, Yukihiro Okada, Kiyomi Kawamura
  • Publication number: 20100068627
    Abstract: A nonaqueous electrolyte secondary battery includes: a positive electrode 4 including a positive electrode current collector and a positive electrode mixture layer containing a positive electrode active material and a binder, the positive electrode mixture layer being provided on the positive electrode current collector; a negative electrode 5; a porous insulating layer 6 interposed between the positive electrode 4 and the negative electrode 5; and a nonaqueous electrolyte. The positive electrode 4 has a tensile extension percentage of equal to or higher than 3.0%. The positive electrode current collector is made of aluminium containing iron. In this manner, the tensile extension percentage of the positive electrode is increased without a decrease in capacity of the nonaqueous electrolyte secondary battery. Accordingly, even when the nonaqueous electrolyte secondary battery is destroyed by crush, occurrence of short-circuit in the nonaqueous electrolyte secondary battery can be suppressed.
    Type: Application
    Filed: August 5, 2008
    Publication date: March 18, 2010
    Inventors: Yoshiyuki Muraoka, Kozo Watanabe, Kaoru Inoue, Yukihiro Okada
  • Publication number: 20100062739
    Abstract: A receiving apparatus for stopping intermittently reception processing including path detection, the receiving apparatus includes a control portion for shifting a window having a predetermined time width indicating a section in which the path detection is performed from a position before a reception stop in accordance with a state of travel of the receiving apparatus before the reception stop, and a path detecting portion for performing the path detection processing on a receive signal within the section expressed by the window after shifted by the control portion, after a lapse of the reception stop period.
    Type: Application
    Filed: August 4, 2009
    Publication date: March 11, 2010
    Applicant: FUJITSU LIMITED
    Inventors: Kanji HOZUMI, Yukihiro OKADA, Yuichi KOMAGATA
  • Patent number: RE41695
    Abstract: In a fuel cell system, leakage of a fuel and a by-product produced in oxidizing a fuel, and leakage thereof out of a fuel cell by evaporation are prevented. For this purpose, in a fuel cell system comprising an electrogenerating portion having a fuel electrode, an oxidant electrode and an electrolyte sandwiched between the fuel electrode and the oxidant electrode; a fuel accommodating container accommodating a fuel to be supplied to the fuel electrode; a fuel supplying portion supplying a fuel from the fuel accommodating container to the electrogenerating portion; and a fuel discharging portion connected to the fuel electrode, the fuel accommodating container, the fuel supplying portion, the fuel electrode and the fuel discharging portion are air-tightly connected.
    Type: Grant
    Filed: December 6, 2004
    Date of Patent: September 14, 2010
    Assignee: Panasonic Corporation
    Inventors: Nobuhiko Hojo, Aoi Muta, Satoshi Shibutani, Yukihiro Okada