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).

  • Patent number: 8760168
    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: Grant
    Filed: February 19, 2009
    Date of Patent: June 24, 2014
    Assignees: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko Kudo, Mutsumi Kikuchi, Masaki Nagaoka
  • Publication number: 20140159739
    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 12, 2014
    Publication date: June 12, 2014
    Applicants: Hitachi Vehicle Energy, Ltd., Hitachi, Ltd.
    Inventors: Akihiko KUDO, Mutsumi KIKUCHI, Gosuke SHIBAHARA, Akihiko EMORI, Yasuo UEMURA, Tatsumi YAMAUCHI, Kenji KUBO, Masahito SONEHARA, Masahiko AMANO, Yoshinori AOSHIMA
  • Publication number: 20140152261
    Abstract: A battery system monitoring apparatus that monitors a battery system is provided having a cell group having a plurality of unit cells connected in series, including: a first control device that controls the cell group; and a plurality of voltage detection lines that connect positive electrodes and negative electrodes of the unit cells to the first control device, for measuring inter-terminal voltages of the unit cells. The first control device includes a balancing switch connected between the voltage detection line connected to the positive electrode of each unit cell and the voltage detection line connected to the negative electrode thereof for conducting balancing discharge of the unit cell, for each of the unit cells. A first resistor is disposed in series with each of the voltage detection lines, a first capacitor is connected between the voltage detection line, and a GND which is a lowest-level potential of the cell group.
    Type: Application
    Filed: August 18, 2011
    Publication date: June 5, 2014
    Applicant: Hitachi Vehicle Energy, Ltd.
    Inventors: Tatsumi Yamauchi, Akihiro Machida, Akihiko Kudo, Akihiko Emori, Mutsumi Kikuchi
  • Patent number: 8723527
    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: Grant
    Filed: February 25, 2010
    Date of Patent: May 13, 2014
    Assignees: 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: 20140088823
    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: December 2, 2013
    Publication date: March 27, 2014
    Applicants: Hitachi Vehicle Energy, Ltd., Hitachi, Ltd
    Inventors: Kenji KUBO, Akihiko KUDO, Mutsumi KIKUCHI, Akihiko EMORI
  • Patent number: 8649935
    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: Grant
    Filed: February 8, 2013
    Date of Patent: February 11, 2014
    Assignees: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Kenji Kubo, Akihiko Kudo, Mutsumi Kikuchi, Akihiko Emori
  • Patent number: 8594536
    Abstract: A developing unit includes: a developing roller; a first conveying member provided in a first container, having a first shaft and a spiral blade, that agitates and conveys developer; a second conveying member provided in a second container connected to the first container via a hole, having a second shaft and a spiral blade, that agitates and conveys the developer; and a supplying member having a third shaft and a paddle blade, that supplies the developer conveyed by the first or the second conveying member to a developing roller, wherein: at least one of the first and second shafts includes a first portion that faces the hole and a second portion that does not face the hole; and a diameter of the at least one of the first and second shafts in at least a part of the first portion is smaller than a diameter in the second portion.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: November 26, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shinichi Kuramoto, Taichi Yamada, Masahiro Uchida, Mutsumi Kikuchi
  • Patent number: 8518570
    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: Grant
    Filed: February 12, 2010
    Date of Patent: August 27, 2013
    Assignees: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko Kudo, Gosuke Shibahara, Mutsumi Kikuchi, Satoru Shigeta
  • Patent number: 8487590
    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: Grant
    Filed: March 25, 2008
    Date of Patent: July 16, 2013
    Assignee: Hitachi Vehicle Energy, Ltd
    Inventors: Akihiko Kudo, Masaki Nagaoka, Kenichiro Tsuru, Mutsumi Kikuchi, Tatsumi Yamauchi, Akihiko Emori
  • Patent number: 8426047
    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: Grant
    Filed: August 19, 2008
    Date of Patent: April 23, 2013
    Assignees: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko Emori, Youhei Kawahara, Kei Sakabe, Mutsumi Kikuchi, Tatsumi Yamauchi, Akihiko Kudo
  • Patent number: 8401728
    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: Grant
    Filed: January 19, 2012
    Date of Patent: March 19, 2013
    Assignees: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Kenji Kubo, Akihiko Kudo, Mutsumi Kikuchi, Akihiko Emori
  • Patent number: 8295738
    Abstract: A developing unit including a retainer receiving portion for receiving a developer retainer, a first agitation portion adjacent to the retainer receiving portion, a second agitation portion adjacent to the first agitation portion, a first conveyance member received in the first agitation portion, a second conveyance member received in the second agitation portion, a layer thickness limiting member made of a magnetic material and disposed between the second conveyance member and the developer retainer to limit the layer thickness of a developer retained on the surface of a retaining member, and a blocking portion disposed on the upstream side of the layer thickness limiting member in the rotation direction of the retaining member and in a space located between the layer thickness limiting member and the second agitation portion to block a developer on the upstream side of the layer thickness limiting member from entering the space.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: October 23, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Mutsumi Kikuchi
  • Patent number: 8264204
    Abstract: A cell controller with excellent reliability in which noise and soon are suppressed is provided. The cell controller includes, corresponding to the number of cell packs, a plurality of ICs each having a voltage detecting circuit detecting voltages of respective cells of a cell pack in which four cells are connected in series, a switch control circuit controlling conduction and a blocking operation of a plurality of switch elements connected in parallel to the respective cells via capacity adjusting resistors, a LIN1 terminal for inputting control information, a LIN2 terminal for outputting control information, a Vcc terminal and a GND terminal, and a LIN2 terminal of a higher-order IC and a LIN1 terminal of a lower-order IC are connected in a daisy chain.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: September 11, 2012
    Assignee: Hitachi Vehicle Energy, Ltd.
    Inventors: Masaki Nagaoka, Akihiko Kudo, Mutsumi Kikuchi, Kenichiro Tsuru, Tatsumi Yamauchi, Akihiko Emori
  • Patent number: 8212571
    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: Grant
    Filed: September 25, 2008
    Date of Patent: July 3, 2012
    Assignees: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko Emori, Youhei Kawahara, Kei Sakabe, Mutsumi Kikuchi, Tatsumi Yamauchi, Akihiko Kudo, Kenji Kubo
  • Publication number: 20120141848
    Abstract: A suppressed noise cell controller includes, corresponding to a number of cell packs, a plurality of ICs each having a voltage detecting circuit detecting voltages of respective cells of a cell pack in which four cells are connected in series, a switch control circuit controlling conduction and a blocking operation of a plurality of switch elements connected in parallel to the respective cells via capacity adjusting resistors, terminal LIN1 for inputting control information, terminal LIN2 for outputting control information, terminal Vcc and GND terminal, and terminal LIN2 of a higher-order IC and terminal LIN1 of a lower-order IC are daisy chain connected. The Vcc terminal of each IC is connected to a positive electrode of a higher-order cell among cells constituting a corresponding cell pack via a noise eliminating inductor, and the GND terminal is coupled directly to Vcc of the lower-order IC. Noise isn't superposed on LIN1 or LIN2.
    Type: Application
    Filed: January 10, 2012
    Publication date: June 7, 2012
    Applicant: HITACHI VEHICLE ENERGY, LTD.
    Inventors: Masaki Nagaoka, Akihiko Kudo, Mutsumi Kikuchi, Kenichiro Tsuru, Tatsumi Yamauchi, Akihiko Emori
  • Publication number: 20120133370
    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 19, 2012
    Publication date: May 31, 2012
    Applicants: Hitachi Vehicle Energy, Ltd., Hitachi, Ltd.
    Inventors: Kenji KUBO, Akihiko KUDO, Mutsumi KIKUCHI, Akihiko EMORI
  • Publication number: 20120099899
    Abstract: A developing unit includes: a developing roller; a first conveying member provided in a first container, having a first shaft and a spiral blade, that agitates and conveys developer; a second conveying member provided in a second container connected to the first container via a hole, having a second shaft and a spiral blade, that agitates and conveys the developer; and a supplying member having a third shaft and a paddle blade, that supplies the developer conveyed by the first or the second conveying member to a developing roller, wherein: at least one of the first and second shafts includes a first portion that faces the hole and a second portion that does not face the hole; and a diameter of the at least one of the first and second shafts in at least a part of the first portion is smaller than a diameter in the second portion.
    Type: Application
    Filed: May 31, 2011
    Publication date: April 26, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shinichi KURAMOTO, Taichi YAMADA, Masahiro UCHIDA, Mutsumi KIKUCHI
  • Patent number: 8159184
    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: Grant
    Filed: August 19, 2008
    Date of Patent: April 17, 2012
    Assignees: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko Emori, Youhei Kawahara, Kei Sakabe, Mutsumi Kikuchi, Tatsumi Yamauchi, Akihiko Kudo
  • Publication number: 20120025769
    Abstract: A battery system for a vehicle is provided with discharge circuits (R1, 129A through 129D, 128A through 128D) that discharge battery cells (BC1 through BC4) via measurement lines of those battery cells (BC1 through BC4).
    Type: Application
    Filed: February 18, 2010
    Publication date: February 2, 2012
    Applicants: Hitachi Vehicle Energy, Ltd., Hitachi, LTD.
    Inventors: Mutsumi Kikuchi, Akihiko Kudo, Gosuke Shibahara, Yoshinori Aoshima, Kenji Kubo, Yasuo Uemura
  • Patent number: 8103401
    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: Grant
    Filed: January 28, 2009
    Date of Patent: January 24, 2012
    Assignees: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Kenji Kubo, Akihiko Kudo, Mutsumi Kikuchi, Akihiko Emori