Patents by Inventor Mutsumi Kikuchi

Mutsumi Kikuchi 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).

  • Publication number: 20100244847
    Abstract: A battery monitoring system, comprises a battery state detection circuit that detects battery states of a plurality of battery cells that are connected in series, based on respective cell voltages of the plurality of battery cells, and a control circuit that monitors state of a battery cell, based on each cell voltage of the plurality of battery cells. The control circuit inputs pseudo voltage information to the battery state detection circuit, and thereby diagnoses whether or not the battery state detection circuit is operating normally.
    Type: Application
    Filed: February 25, 2010
    Publication date: September 30, 2010
    Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko Kudo, Mutsumi Kikuchi, Gosuke Shibahara, Akihiko Emori, Yasuo Uemura, Tatsumi Yamauchi, Kenji Kubo, Masahito Sonehara, Masahiko Amano, Yoshinori Aoshima
  • Publication number: 20100209748
    Abstract: A battery system includes: a battery unit formed by electrically connected in series a plurality of cell groups each made up with a plurality of battery cells electrically connected in series; a plurality of sensing lines for detecting voltages of respective battery cells in the battery unit; an integrated circuit provided to each of the cell group, to which the sensing lines for detecting voltages of respective battery cells in the cell group are connected; a case having housed therein a substrate at which a plurality of integrated circuits provided for the cell groups respectively are mounted; noise protection capacitors disposed between input terminals of the plurality of sensing lines; and at least one protection element against static electricity which is connected between the input terminals and the case.
    Type: Application
    Filed: February 12, 2010
    Publication date: August 19, 2010
    Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko Kudo, Gosuke Shibahara, Mutsumi Kikuchi, Satoru Shigeta
  • Patent number: 7759975
    Abstract: A first converter circuit converts a state signal, whose level is constant or slowly varies during a predetermine period of time, into a pulse signal to allow the signal to propagate across an electrically insulating area. A second converter circuit converts the pulse signal, which has propagated through an insulating circuit, into the original state signal or a signal having the same characteristics as the original state signal.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: July 20, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Fumio Murabayashi, Takashi Sase, Mutsumi Kikuchi, Atsuo Watanabe, Masatsugu Amishiro, Kenji Tabuchi
  • Patent number: 7728545
    Abstract: In equipment with a built-in fuel cell, there are provided a plurality of secondary cells, and each of the secondary cells has a first state in which an electric power is supplied to a load within the equipment, and a second state in which the electric power that is supplied from the fuel cell is charged, and the first state and the second state is selectively used. The present invention can provide the fuel cell-carried equipment that stably operates due to a power system on which a fuel cell and plural secondary cells are mounted.
    Type: Grant
    Filed: August 16, 2005
    Date of Patent: June 1, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Akihiko Kanouda, Mutsumi Kikuchi, Hideaki Koyama, Eisaku Fujita, Yasuaki Norimatsu
  • Patent number: 7667350
    Abstract: A method of controlling an electric power source apparatus, which comprises supplying electric power to an electronic device on which a secondary battery is mounted from a power source apparatus having a fuel cell and an auxiliary power source. Electric power is supplied intermittently to a charging terminal of the electronic device by means of a switch for controlling conduction and interruption of an output terminal of the power source apparatus.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: February 23, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Yasuaki Norimatsu, Akihiko Kanouda, Mutsumi Kikuchi
  • Patent number: 7647010
    Abstract: The present invention provides a toner cartridge of replaceable type that is removably loaded into an apparatus main body, the toner cartridge including: a first section that is substantially cylindrical shape and at which a toner conveying member is disposed; and a second section that is provided at a substantially central portion in a longitudinal direction of the toner cartridge, the substantially central portion being a portion other than an upstream side in a toner conveyance direction of the first section and a downstream side in the toner conveyance direction of the first section at which a toner supply opening.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: January 12, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hiromitsu Koizumi, Chiharu Nakajima, Takuji Matsumoto, Toyohiko Awano, Shigeki Nishimura, Mutsumi Kikuchi, Yasufumi Kayahara
  • Publication number: 20100001737
    Abstract: A battery system includes a battery module that is constituted with a plurality of serially connected battery cells, a plurality of integrated circuits that group the battery cells by a plurality thereof so as to perform processing on battery cells in each group, a first transmission path through which a command signal is transmitted via a first insulating circuit from a higher-order control circuit that controls the plurality of integrated circuits to a highest-order integrated circuit of the integrated circuit, a second transmission path through which a data signal collected by the plurality of integrated circuits is transmitted from the highest-order integrated circuit to a lowest-order integrated circuit, and a third transmission path through which the data signal is transmitted from the lowest-order integrated circuit to the higher-order control circuit via a second insulating circuit.
    Type: Application
    Filed: June 30, 2009
    Publication date: January 7, 2010
    Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd
    Inventors: Kenji Kubo, Akihiko Kudo, Mutsumi Kikuchi, Gosuke Shibahara
  • Patent number: 7626353
    Abstract: When the mobile type information terminal is transferred between an operating state and a standby state, self diagnosis is performed. The fuel cell charges the secondary cells with a normal current of fixed value I1, and when the output voltage of the boost DC/DC converter (when PG=L), the charge current is reduced to the fixed value and aging is performed. After aging is performed for 60 seconds, charging is performed once again performed at the normal fixed value I1. This type of operation is repeated 30 times. During aging, when the output voltage from the boost DC/DC converter is reduced (when PG=L), aging is stopped and after 20 seconds aging is performed again, and this operation is done 10 times. The mobile type information terminal can perform self diagnosis and retrial of regeneration without the user being aware, in which secondary batteries and a fuel cell are loaded.
    Type: Grant
    Filed: October 19, 2005
    Date of Patent: December 1, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Akihiko Kanouda, Mutsumi Kikuchi, Yasuaki Norimatsu, Junichi Kimura, Eisaku Fujita, Makoto Suzuki, Akira Ishii, Manabu Murakawa, Hideaki Koyama, Kazuaki Adachi
  • Publication number: 20090243621
    Abstract: An assembled battery total voltage detection circuit includes a main control circuit, a divider resistor connected between a plus terminal and a minus terminal of an assembled battery insulated from the main control circuit, and a differential amplifier circuit that amplifies voltage divided by the divider resistor. A constant electric potential relative to a ground of the main control circuit is applied to a midpoint of the divider resistor. The main control circuit measures the voltage divided by the divider resistor via the differential amplifier circuit.
    Type: Application
    Filed: February 19, 2009
    Publication date: October 1, 2009
    Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko KUDO, Mutsumi KIKUCHI, Masaki NAGAOKA
  • Publication number: 20090198399
    Abstract: A battery system for vehicle comprises a battery unit that is constituted with a plurality of serially connected cell groups each include a plurality of serially connected battery cells, integrated circuits that are each disposed in correspondence to one of the cell groups of the battery unit and each measure terminal voltages at the battery cells in the corresponding cell group, and a signal transmission path through which one of the integrated circuits is connected to another one of the integrated circuits or to a circuit other than that of the integrated circuits.
    Type: Application
    Filed: January 28, 2009
    Publication date: August 6, 2009
    Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Kenji KUBO, Akihiko Kudo, Mutsumi Kikuchi, Akihiko Emori
  • Publication number: 20090130541
    Abstract: A multi-series battery control system comprises battery cell groups each having a plurality of serially connected battery cells, a plurality of integrated circuits each disposed in correspondence to one of the battery cell groups and a battery control device that exchanges signals with the individual integrated circuits. Each integrated circuit includes an address setting means that receives a message unique to the integrated circuit, different from messages sent to other integrated circuits, from the battery control device, writes over an initialized address of the integrated circuit with the message and alters the message to a message with which an initialized address of another integrated circuit cannot be overwritten in a step assigned with an ordinal number matching the position of the integrated circuit with regard to the connection order.
    Type: Application
    Filed: August 19, 2008
    Publication date: May 21, 2009
    Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko Emori, Youhei Kawahara, Kei Sakabe, Mutsumi Kikuchi, Tatsumi Yamauchi, Akihiko Kudo
  • Publication number: 20090115506
    Abstract: A first converter circuit converts a state signal, whose level is constant or slowly varies during a predetermine period of time, into a pulse signal to allow the signal to propagate across an electrically insulating area. A second converter circuit converts the pulse signal, which has propagated through an insulating circuit, into the original state signal or a signal having the same characteristics as the original state signal.
    Type: Application
    Filed: December 29, 2008
    Publication date: May 7, 2009
    Applicant: HITACHI, LTD.
    Inventors: Fumio Murabayashi, Takashi Sase, Mutsumi Kikuchi, Atsuo Watanabe, Masatsugu Amishiro, Kenji Tabuchi
  • Patent number: 7529511
    Abstract: The present invention provides an exchangeable toner cartridge which can be attached to or detached from an apparatus main body. The toner cartridge includes the toner transfer member which is provided along a longitudinal direction of the toner cartridge and which can rotate. At the first range of the upstream side in a toner transfer direction the toner transfer member is formed into a substantially spiral shape, and at the second range of the downstream side in the toner transfer direction on a side of a toner supply port, toner transfer member has a shape different from that of the first range.
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: May 5, 2009
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasufumi Kayahara, Takuji Matsumoto, Hiromitsu Koizumi, Chiharu Nakajima, Mutsumi Kikuchi, Toyohiko Awano, Shigeki Nishimura
  • Patent number: 7526352
    Abstract: A semiconductor production system has a semiconductor manufacturing apparatus having an exposure unit, a control unit for controlling the exposure unit and a storage device; a semiconductor inspection apparatus having an observation unit, a control unit for controlling the observation unit and a storage device; and a storage device commonly used by the semiconductor manufacturing apparatus and the semiconductor inspection apparatus. The manufacturing apparatus, the inspection apparatus and the commonly used storage device are interconnected via a storage area network. With the semiconductor manufacturing apparatus and the storage device linked together via the storage area network, a large volume of image data or design data can be communicated at high speed, thus improving the system throughput.
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: April 28, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Hidemitsu Naya, Rikio Tomiyoshi, Shigeo Moriyama, Mutsumi Kikuchi, Kotaro Shimamura
  • Publication number: 20090103945
    Abstract: The present invention provides an exchangeable toner cartridge which can be attached to or detached from an apparatus main body. The toner cartridge includes the toner transfer member which is provided along a longitudinal direction of the toner cartridge and which can rotate. At the first range of the upstream side in a toner transfer direction the toner transfer member is formed into a substantially spiral shape, and at the second range of the downstream side in the toner transfer direction on a side of a toner supply port, toner transfer member has a shape different from that of the first range.
    Type: Application
    Filed: December 18, 2008
    Publication date: April 23, 2009
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yasufumi KAYAHARA, Takuji Matsumoto, Hiromitsu Koizumi, Chiharu Nakajima, Mutsumi Kikuchi, Toyohiko Awano, Shigeki Nishimura
  • Publication number: 20090091332
    Abstract: A vehicle power supply device comprises a lithium battery module that includes a plurality of lithium battery cells, first control devices, voltage detection harnesses via which terminal voltages at individual lithium battery cells are input to the first control devices, a second control device and a signal transmission path through which signals are transmitted. The first control device comprises a selection circuit that selects terminal voltages at individual lithium battery cells, a voltage measurement circuit that measures the selected terminal voltages, balancing switches used to discharge individual lithium battery cells, a balancing switch control circuit that controls open/close of the balancing switches, and a diagnosis circuit for detecting an electrically abnormal connection in the detection harnesses.
    Type: Application
    Filed: September 25, 2008
    Publication date: April 9, 2009
    Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko Emori, Youhei Kawahara, Kei Sakabe, Mutsumi Kikuchi, Tatsumi Yamauchi, Akihiko Kudo, Kenji Kubo
  • Publication number: 20090087722
    Abstract: A vehicle power supply system comprises a battery module that includes a plurality of battery cells, battery cell control devices and a signal transmission path through which signals are transmitted. The battery cell control device comprises a voltage measurement circuit that measures terminal voltages at the battery cells, an abnormality diagnosis circuit that diagnoses an abnormality in the battery cell control device, a timing control circuit that outputs a signal for instructing measurement phase and a signal for instructing diagnosis phase, and a communication circuit that outputs a signal indicating the terminal voltage and a signal based upon a diagnosis result by the abnormality diagnosis circuit.
    Type: Application
    Filed: September 25, 2008
    Publication date: April 2, 2009
    Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Kei Sakabe, Akihiko Emori, Akihiko Kudo, Kenji Kubo, Youhei Kawahara, Mutsumi Kikuchi, Tatsumi Yamauchi
  • Publication number: 20090085516
    Abstract: An automotive power supply system comprises a battery module that includes serially connected battery groups each constituted with serially connected battery cells, integrated circuits each disposed in correspondence to one of the battery groups, a control circuit, a transmission path through which the integrated circuits are connected to the control circuit and a relay circuit via which an electrical current is supplied from the battery module. In response to a start signal instructing an operation start and received via the transmission path, each integrated circuit measures terminal voltages at the individual battery cells in the corresponding battery group and executes an abnormality diagnosis. If abnormality diagnosis results provided by the integrated circuits indicate no abnormality, the control circuit closes the relay, enabling supply of electrical current from the battery module and subsequently, the control circuit receives measurement results from the integrated circuits via the transmission path.
    Type: Application
    Filed: August 19, 2008
    Publication date: April 2, 2009
    Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko EMORI, Youhei Kawahara, Kei Sakabe, Mutsumi Kikuchi, Tatsumi Yamauchi, Akihiko Kudo
  • Publication number: 20090079382
    Abstract: A fuel cell 1 and an electric double-layer capacitor 2 are parallelly arranged for a power supply. A DC/DC converter 3 steps up voltage of the fuel cell 1 and the electric double-layer capacitor 2, to thereby output power. An output switch 5 is disposed on an output pathway of the DC/DC converter 3. By controlling the output switch 5 with a control IC 4, output power can be switched on and off. When there is a fuel shortage or abnormality in the fuel cell 1, the control IC 4 controls the output switch 5, to thereby intermittently alter the output power. With this configuration, when the power supply is used for a mobile telephone as a portable electronic device connected thereto, a user can confirm whether there is a fuel shortage or a fuel cell abnormality by checking of blinking state of a charge pilot lamp of the mobile telephone.
    Type: Application
    Filed: April 26, 2006
    Publication date: March 26, 2009
    Inventors: Yasuaki Norimatsu, Akihiko Kanouda, Mutsumi Kikuchi
  • Publication number: 20090021222
    Abstract: A cell controller capable of ensuring high safety even when a short occurs among voltage detecting lines without causing increased costs is provided. The cell controller 10 includes a unit cell voltage detecting section 7 to detect a voltage of each unit cell 1 constituting a battery group through each voltage detecting line and a SOC adjusting circuit for adjusting a SOC of each unit cell 1 having resistors 2 for SOC adjustment, switching elements 6, and a bypass control section 8 to exercise on/off control on the switching elements 6. Each resistor 2 is connected in series to each voltage detecting line and the unit cell voltage detecting section 7 to detect a voltage of each unit cell 1 through each of the resistors 2.
    Type: Application
    Filed: March 25, 2008
    Publication date: January 22, 2009
    Applicant: HITACHI VEHICLE ENERGY, LTD.
    Inventors: Akihiko KUDO, Masaki NAGAOKA, Kenichiro TSURU, Mutsumi KIKUCHI, Tatsumi YAMAUCHI, Akihiko EMORI