Patents by Inventor Michio Murai

Michio Murai 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: 6231626
    Abstract: A paste-like active material mixture prepared by mixing an active material powder and a particulate material comprising a polymer soluble in a nonaqueous electrolytic solution is applied to, e.g., collectors 1c and 2c to a uniform thickness, and then dried to form positive and negative electrodes 1, 2 containing an active material powder and a particulate polymer. The two electrodes are assembled into an electrode laminate into which the foregoing electrolytic solution is then injected.
    Type: Grant
    Filed: February 3, 1998
    Date of Patent: May 15, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yasuhiro Yoshida, Kouji Hamano, Takayuki Inuzuka, Michio Murai, Hisashi Shiota, Shigeru Aihara, Syo Shiraga
  • Patent number: 6225010
    Abstract: A lithium ion secondary battery. The battery maintains an electrical connection between electrodes without using a firm case and can have an increased energy density at a reduced thickness while exhibiting excellent charge and discharge characteristics. The battery includes a plurality of electrode laminates each having a positive electrode, a negative electrode and a separator. The positive electrode includes a positive electrode active material layer and a positive electrode current collector. The negative electrode includes a negative electrode active material layer and a negative electrode current collector. This separator is impregnated with a lithium ion-containing electrolytic solution and is interposed between the electrodes in intimate contact. The positive electrode, negative electrode and separator are joined together in intimate contact with porous adhesive resin layers having through holes.
    Type: Grant
    Filed: July 19, 1999
    Date of Patent: May 1, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kouji Hamano, Yasuhiro Yoshida, Hisashi Shiota, Shigeru Aihara, Michio Murai, Takayuki Inuzuka, Sho Shiraga
  • Patent number: 6136471
    Abstract: Positive and negative active material particles 7a and 9a are adhered to the respective current collectors 6 and 8 by means of a binder resin 11 to prepare positive and negative electrodes 3 and 5. The positive and negative electrode active material layers 7 and 9 are adhered to a separator 4 with the binder resin 11 so that the interlaminar strength between each active material layer 7, 9 and the separator 4 may be not lower than that between the active material layer 7, 9 and the respective current collector 10, 9. A lithium ion-containing electrolytic solution is held in voids 12 made in the active material layers 7, 9 and the separator 4 to complete an electrical connection between the electrodes.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: October 24, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yasuhiro Yoshida, Kouji Hamano, Hisashi Shiota, Shou Shiraga, Shigeru Aihara, Takayuki Inuzuka, Michio Murai
  • Patent number: 6124061
    Abstract: To obtain a lithium ion secondary battery having excellent charge and discharge characteristics in which electric connection between electrodes can be maintained without requiring a strong armor metal case, so that it can be made into thin forms having large energy density.
    Type: Grant
    Filed: December 3, 1997
    Date of Patent: September 26, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kouji Hamano, Yasuhiro Yoshida, Hisashi Shiota, Shou Shiraga, Shigeru Aihara, Michio Murai, Takayuki Inuzuka
  • Patent number: 6051342
    Abstract: In a lithium ion secondary battery which is composed of a positive electrode 1, a negative electrode 4 and a separator 7 which contains a Li ion-containing non-aqueous electrolytic solution, both of the ionic conductivity and adhesion strength were ensured by making an adhesive resin layer 8 which bonds the positive electrode 1 to the separator 7 and the negative electrode 4 to the separator 7 into a mixture phase consisting of an electrolytic solution phase 9, an electrolytic solution-containing a polymer gel phase 10 and a polymer solid phase 11.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: April 18, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kouji Hamano, Yasuhiro Yoshida, Hisashi Shiota, Shou Shiraga, Shigeru Aihara, Michio Murai, Takayuki Inuzuka
  • Patent number: 6024773
    Abstract: To provide a process for producing a lithium ion secondary battery which can have any arbitrary shape, such as thin shape, and yet exhibits high performance. In a method of fabricating a battery comprising a positive electrode 1, a negative electrode 4, and a separator 7, a binder resin solution mainly comprising polyvinylidene fluoride is applied to the separator 7, and the positive electrode 1 and the negative electrode 4 are laid thereon, followed by drying to form a battery laminate, which is then impregnated with an electrolytic solution.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: February 15, 2000
    Assignee: Mitsushita Denki Kabushiki Kaisha
    Inventors: Takayuki Inuzuka, Yasuhiro Yoshida, Michio Murai, Kouji Hamano, Hisashi Shiota, Shou Shiraga, Shigeru Aihara
  • Patent number: 5981107
    Abstract: To obtain a lithium ion secondary battery having excellent charge and discharge characteristics in which electric connection between active material layers and a separator can be maintained without requiring a strong armor metal case, so that it can be made into thin forms having large energy density. Convex parts and concave parts are formed on at least two surfaces among surfaces of a positive electrode active material layer 7 and a negative electrode active material layer 9 both adjacent to a separator 4 and surfaces of the separator 4 facing both of the active material layers 7, 9, and these three means are bonded and closely adhered by an adhesive resin layer 11 and electrically connected by keeping a lithium ion-containing electrolytic solution in the separator 4 and voids 12 formed by a bonded surface 11a of the convex parts and the concave parts.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: November 9, 1999
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kouji Hamano, Hisashi Shiota, Shou Shiraga, Shigeru Aihara, Yasuhiro Yoshida, Michio Murai, Takayuki Inuzuka
  • Patent number: 5430879
    Abstract: Data lines constituting a data bus for connecting a plurality of parallel I/O devices are assigned in a one-to-one correspondence with the I/O devices. Each I/O device outputs an interrupt request to a CPU through an interrupt request line. In response to an interrupt enable signal from the CPU, each I/O device supplies information indicating its mounting position to an interface circuit as interrupt data through a data line of the data bus assigned to itself. The interface circuit has a latch circuit for latching interrupt data from the plurality of I/O devices, a circuit for setting the priority of interrupt data latched by the latch circuit, and a circuit for generating an interrupt vector on the basis of interrupt data having the highest priority in accordance with the set priority order.
    Type: Grant
    Filed: July 19, 1993
    Date of Patent: July 4, 1995
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Michio Murai
  • Patent number: 5033050
    Abstract: A data processing system having a device performing input and output of data for processing the data. The system includes a main control unit for processing the data and for performing a parity check function to detect abnormality of data transmitted in the system, a parity check control unit coupled to the main control unit for performing the parity check function for the device, and an external device unit operative coupled to the main control unit and the parity check control unit for performing input and output of the data under control of the parity check function and for generating an inhibition signal to inhibit the operation of the parity check control unit.
    Type: Grant
    Filed: March 20, 1989
    Date of Patent: July 16, 1991
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Michio Murai