Patents by Inventor Akihiko Kudo

Akihiko Kudo 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: 20190085473
    Abstract: A reduction catalyst body for carbon dioxide of an embodiment includes a metal layer, and a projection provided on the metal layer. The projection is constituted of an aggregate of fine metal particles, and possesses a polyhedral structure having surfaces of three faces or more of a polygon. The projection has a site of reducing carbon dioxide, as at least a part of the surfaces.
    Type: Application
    Filed: March 8, 2018
    Publication date: March 21, 2019
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshitsune SUGANO, Akihiko ONO, Jun TAMURA, Ryota KITAGAWA, Asahi MOTOSHIGE, Yuki KUDO, Masakazu YAMAGIWA, Takayuki TSUKAGOSHI, Satoshi MIKOSHIBA
  • Publication number: 20190085470
    Abstract: An electrochemical reaction device, comprises: an anode to oxidize a first substance; a first flow path facing on the anode and through which a liquid containing the first substance flows; a cathode to reduce a second substance; a second flow path facing on the cathode and through which a gas containing the second substance flows; a porous separator provided between the anode and the cathode; and a power supply connected to the anode and the cathode. A thickness of the porous separator is 1 ?m or more and 500 ?m or less. An average fine pore size of the porous separator is larger than 0.008 ?m and smaller than 0.45 ?m. A porosity of the porous separator is higher than 0.5.
    Type: Application
    Filed: March 8, 2018
    Publication date: March 21, 2019
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akihiko ONO, Takuya HONGO, Masakazu YAMAGIWA, Yuki KUDO, Satoshi MIKOSHIBA, Norihiro YOSHINAGA, Yuta KANAI, Jun TAMURA
  • Publication number: 20190085477
    Abstract: A carbon dioxide electrolytic device comprises: an electrolysis cell including a cathode, an anode, a carbon dioxide source to supply carbon dioxide to the cathode, a solution source to supply an electrolytic solution, and a separator separating the anode and the cathode; a power controller connected to the anode and the cathode; a refresh material source including a gas source to supply a gaseous substance, and a solution source to supply a rinse solution; and a controller to control the carbon dioxide source, the solution source, the power controller, and the refresh material source in accordance with request criteria of a performance of the cell and thus stop the supply of the carbon dioxide and the electrolytic solution, and apply the voltage therebetween while supplying the rinse solution thereto.
    Type: Application
    Filed: March 13, 2018
    Publication date: March 21, 2019
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akihiko ONO, Yuki Kudo, Ryota Kitagawa, Masakazu Yamagiwa, Jun Tamura, Satoshi Mikoshiba, Yoshitsune Sugano
  • Patent number: 10233549
    Abstract: To convert light into a chemical substance with high conversion efficiency. A device, comprising: a photovoltaic layer having a first face and a second face; an oxidation electrode layer electrically connected to the first face of the photovoltaic layer; a reduction electrode layer electrically connected to the second face of the photovoltaic layer; a first electrolytic solution being supplied to the oxidation electrode layer; a second electrolytic solution being supplied to the reduction electrode layer; and a porous layer, provided to in contact with at least one of the first electrolytic solution and the second electrolytic solution, having fine pores through which a product produced by the oxidation reaction or the reduction reaction passes, and being given a temperature gradient wherein the product being purified by the porous layer.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: March 19, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akihiko Ono, Satoshi Mikoshiba, Yuki Kudo, Ryota Kitagawa, Jun Tamura, Eishi Tsutsumi, Yoshitsune Sugano
  • Patent number: 10202041
    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: June 28, 2016
    Date of Patent: February 12, 2019
    Assignees: Hitachi, Ltd., Hitachi Automotive Systems, Ltd.
    Inventors: Akihiko Kudo, Mutsumi Kikuchi, Gosuke Shibahara, Akihiko Emori, Yasuo Uemura, Tatsumi Yamauchi, Kenji Kubo, Masahito Sonehara, Masahiko Amano, Yoshinori Aoshima
  • Patent number: 10073128
    Abstract: A leak detection device includes a pulse signal outputting portion that outputs predetermined pulse signals to a positive connecting wire connected to a positive side of a battery and a negative connecting wire connected to a negative side of the battery. A response waveform detecting portion of the leak detection device detects a positive response waveform for the pulse signal output to the positive connecting wire and a negative response waveform for the pulse signal output to the negative connecting wire. An amplitude ratio calculating portion calculates an amplitude ratio based on the positive response waveform and the negative response waveform, and a leak detecting portion detects a leak between the battery and a ground based on the amplitude ratio.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: September 11, 2018
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yuji Yoshioka, Tsuyoshi Kai, Akihiko Kudo, Masahiro Ueda
  • Publication number: 20180241100
    Abstract: Even when a service disconnect switch is opened, an integrated circuit connected to single battery cells are operated. The cell controller is provided with: the integrated circuits; a signal transmission path through which a signal is transmitted between the integrated circuits via the capacitors; and the connection circuit. The first integrated circuit is provided corresponding to the first cell group electrically connected to one side of the SD-SW, and the second integrated circuit is provided corresponding to the second cell group electrically connected to one side of the SD-SW. The connection circuit AC-couples the ground terminal GND of the first integrated circuit to the ground terminal GND of the second integrated circuit through the capacitor.
    Type: Application
    Filed: August 8, 2016
    Publication date: August 23, 2018
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Akihiko KUDO, Tomonori KANAI, Tomoyuki ARIMA
  • Patent number: 10014699
    Abstract: Even with a large ripple voltage superposed on a voltage of a battery cell, the voltage of the battery cell can be measured accurately. In a battery monitoring device, a supply circuit, based on a reference voltage inputted from an assembled battery, generates a driving voltage for driving each of switching elements, of a selection circuit and supplies the driving voltage to the selection circuit. The reference voltage is inputted from the assembled battery to the supply circuit via a detecting filter circuit. As a result, a time constant of a route through which the reference voltage is inputted from the assembled battery to the supply circuit is approximately equal to time constants of detecting filter circuits.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: July 3, 2018
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hiroshi Iwasawa, Akihiko Kudo, Mitsuo Noda, Mutsumi Kikuchi, Tomonori Kanai
  • Publication number: 20180052207
    Abstract: Measurement of a cell voltage is executed immediately after diagnosis of a battery management device is ended. In a battery management device, current sources repeatedly perform an energization operation to cause a current to flow to voltage detection lines with a magnitude of the current that enables each amount of charge stored in capacitors changed by one energization operation to fall within a range corresponding to a fluctuation width of terminal voltages of battery cells during the energization operation when resistors are in a normal state. When the difference between the current terminal voltage of the battery cell and the past terminal voltage of the battery cell is larger than the predetermined threshold value, the microcomputer diagnoses that the resistor is in the open state.
    Type: Application
    Filed: March 4, 2016
    Publication date: February 22, 2018
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Tomonori KANAI, Akihiko KUDO, Tomoyuki ARIMA, Akiko TSUKAMOTO
  • Publication number: 20180043781
    Abstract: Cell voltage measurement is executed immediately after termination of diagnosis on a cell voltage detection function. In a battery managing device 10, a voltage detecting unit 140 detects a terminal voltage of each of battery cells 21 and 22. An RC filter 110 is electrically connected to voltage detecting lines L1, L2, and L3, and a status variation causing unit 130 causes an electrical status variation with respect to the voltage detecting lines L1, L2, and L3. A voltage fluctuating unit 120 fluctuates the terminal voltage of the battery cells 21 and 22 in response to the electrical status variation that is caused by the status variation causing unit 130. A microcomputer 150 diagnoses the voltage detecting unit 140 on the basis of a detection result of the terminal voltage of the battery cells 21 and 22 by the voltage detecting unit 140 when the terminal voltage of the battery cells 21 and 22 is fluctuated by the voltage fluctuating unit 120.
    Type: Application
    Filed: March 4, 2016
    Publication date: February 15, 2018
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Tomonori KANAI, Akihiko KUDO, Tomoyuki ARIMA, Akiko TSUKAMOTO
  • Patent number: 9880224
    Abstract: A battery system monitoring device includes a plurality of battery monitoring circuits, which is respectively provided in cell groups, and a balancing resistor. Each of the battery monitoring circuits includes a cell voltage measurement unit to measure a cell voltage of each single battery cell at predetermined timing, a discharge switch to switch a state of a discharge current which flows from each single battery cell through the balancing resistor, and a balancing control unit configured to control the discharge switch. A filter circuit is connected between the cell voltage measurement unit and each single battery cell. The cell voltage measurement unit determines whether a cell voltage is measured within a transient response period corresponding to a time constant of the filter circuit and corrects a measurement value of a cell voltage by using a correction value correcting a result of the determination.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: January 30, 2018
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Akihiko Kudo, Mutsumi Kikuchi, Tomonori Kanai
  • Publication number: 20180017631
    Abstract: An object is to achieve management control of an assembled battery using an accurate measured value of a cell voltage. A battery system monitoring apparatus 10 that monitors and controls a battery system includes battery monitoring circuits 100 provided for respective cell groups 120. Each of the battery monitoring circuits 100 includes a cell voltage measurement module 6 that is connected with two electrodes of respective single battery cells 110 of a corresponding cell group 120 via voltage detection lines 2 and that measures a cell voltage of each of the single battery cells 110 at each of predetermined timings. An RC filter 4 is connected with the voltage detection lines 2. The RC filter 4 includes resistors and capacitors. The cell voltage measurement module 6 extends intervals at which the cell voltage is to be measured when a stored charge amount in the capacitor in the RC filter 4 changes.
    Type: Application
    Filed: February 3, 2016
    Publication date: January 18, 2018
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Akihiko KUDO, Tomonori KANAI, Tomoyuki ARIMA, Akiko TSUKAMOTO
  • Patent number: 9853463
    Abstract: A battery monitoring and control integrated circuit is connected to a cell group having a plurality of series-connected single cells for monitoring and controlling the single cells, and includes: a first start input terminal for connecting to a DC signal generation circuit which generates a DC signal based on an AC start signal input from the outside; a start detection unit which detects the DC signal and activates the battery monitoring and control integrated circuit; and a start output unit which outputs the AC start signal to the outside after the activation of the battery monitoring and control integrated circuit.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: December 26, 2017
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Akihiko Kudo, Mutsumi Kikuchi, Akihiko Emori, Akihiro Machida
  • Patent number: 9825477
    Abstract: A battery monitoring device monitors a battery having a plurality of cell groups in which a plurality of cells is connected in series. The battery monitoring device comprises at one or more integrated circuit units, each of which corresponds to each cell group, that respectively measure the voltages of the cells of the cell group and performs cell balancing in order to adjust the capacities of the cells of the cell group; a control unit that controls the integrated circuit unit; and a power supply unit that supplies power to the control unit. The control unit causes the integrated circuit unit to start or to stop cell balancing, and sets a timer period for starting or stopping supply of the power.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: November 21, 2017
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hikaru Miura, Akihiko Kudo
  • Patent number: 9800137
    Abstract: A power supply startup system activates a power supply of a device provided with a battery or the like at high speed by a wireless signal while suppressing current consumption on standby. The power supply startup system includes a battery, a device supplied with a power from the battery, and a controller which performs wireless communication with the device. The device includes a power supply section which generates a power supply from the battery, a startup section which receives a wireless startup signal transmitted by the controller and outputs a startup signal to the power supply section, a control section which controls the power supply section and the startup section, and a wireless communication section which performs wireless communication with the controller. The wireless startup signal includes at least two signal regions of a first stage and a second stage.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: October 24, 2017
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Takahide Terada, Mutsumi Kikuchi, Akihiko Kudo, Takanori Yamazoe, Hiroshi Iwasawa
  • Publication number: 20170250545
    Abstract: A battery system monitoring apparatus for monitoring a cell group having a plurality of battery cells, and includes a cell controller IC which monitors and controls the states of the plurality of battery cells. A battery controller controls the cell controller IC and a plurality of voltage detection lines measure the voltage across the terminals of the battery cell. The voltage detection lines connect positive and negative electrodes of the battery cell, respectively, to a plurality of voltage input terminals of the cell controller IC. A power line connects the positive electrode of the battery cell having the highest potential among the plurality of battery cells to a power supply terminal of the cell controller IC and a ground line which connects the negative electrode of the battery cell having the lowest potential among the plurality of battery cells to a ground terminal of the cell controller IC.
    Type: Application
    Filed: May 16, 2017
    Publication date: August 31, 2017
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Akihiko KUDO, Mutsumi KIKUCHI, Akihiko EMORI
  • Patent number: 9746525
    Abstract: A battery system monitoring device that monitors a battery system provided with a cell group having a plurality of battery cells connected in series with each other, including: a first control device that monitors and controls states of the plurality of battery cells of the cell group; a second control device that controls the first control device; a temperature detection unit that measures a temperature in the vicinity of the first control device; and a plurality of voltage detection lines, for measuring an inter-terminal voltage of the battery cell, which connect each of a positive electrode and a negative electrode of the battery cell and the first control device. The first control device includes a balancing switch, which performs balancing discharge of the battery cell for each of the battery cells.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: August 29, 2017
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Akihiko Kudo, Mutsumi Kikuchi, Tomonori Kanai, Tatsumi Yamauchi, Akihiro Machida
  • Patent number: 9748537
    Abstract: There is provided a highly reliable storage battery apparatus which can diagnose the status of a temperature detection unit and a cooling unit. In the storage battery apparatus comprising a battery module including one or more batteries, a plurality of temperature detection units and a cooling unit cooling the battery module, the temperature detection units measure, at least, the temperature of the cooling medium inputted to the storage battery apparatus, the temperature of the cooling medium outputted from the storage battery apparatus, and the temperature of at least one of the batteries and the battery module.
    Type: Grant
    Filed: August 10, 2007
    Date of Patent: August 29, 2017
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Akihiko Emori, Youhei Kawahara, Takahiro Kawata, Akihiko Kudo
  • Publication number: 20170214254
    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 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 integrated circuits to a highest-order integrated circuit of the integrated circuit, a second transmission path through which a data signal collected by the 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: April 10, 2017
    Publication date: July 27, 2017
    Inventors: Kenji KUBO, Akihiko KUDO, Mutsumi KIKUCHI, Gosuke SHIBAHARA
  • Patent number: 9696383
    Abstract: A battery monitoring system includes a plurality of battery monitoring devices connected to a battery formed by connecting a plurality of battery cell groups in series, and monitor a state of the battery for the respective battery cell groups, each of the plurality of battery cell groups being of one or a plurality of battery cells connected in series, and a controller that performs wireless communication with the plurality of battery monitoring devices. First identification information portions which are different from each other are set in the plurality of battery monitoring devices in advance, and second identification information corresponding to an order of potentials of the battery cell groups in the battery, to which the battery monitoring devices are connected, is assigned to each of the plurality of battery monitoring devices. The controller stores a relationship between the first and second identification information for each battery monitoring device.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: July 4, 2017
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Mutsumi Kikuchi, Akihiko Kudo, Tomonori Kanai, Hikaru Miura, Akihiko Emori