Patents by Inventor Akihiko Emori

Akihiko Emori 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: 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: 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
  • 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: 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
  • 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
  • Patent number: 9673640
    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: Grant
    Filed: October 20, 2011
    Date of Patent: June 6, 2017
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Akihiko Kudo, Mutsumi Kikuchi, Akihiko Emori
  • Patent number: 9651625
    Abstract: A battery monitoring apparatus comprises a reception section to receive a radio signal and to output power and a demodulated signal according to the radio signal; a first power source circuit to perform power supply based on the power; a decode circuit to operate upon receiving the power supply from the first power source circuit and to output an activation signal and a command based on the demodulated signal; a second power source circuit to be activated according to the activation signal and to perform power supply; a battery monitoring circuit to operate upon receiving the power supply from the second power source circuit and to output a monitoring result of a state of the battery according to the command; and a transmission section to operate upon receiving the power supply from the second power source circuit and to wirelessly transmit the monitoring result.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: May 16, 2017
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Mutsumi Kikuchi, Akihiko Kudo, Tomonori Kanai, Hikaru Miura, Akihiko Emori
  • Publication number: 20160303977
    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: June 28, 2016
    Publication date: October 20, 2016
    Inventors: Akihiko KUDO, Mutsumi KIKUCHI, Gosuke SHIBAHARA, Akihiko EMORI, Yasuo UEMURA, Tatsumi YAMAUCHI, Kenji KUBO, Masahito SONEHARA, Masahiko AMANO, Yoshinori AOSHIMA
  • Publication number: 20160241056
    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: Application
    Filed: April 29, 2016
    Publication date: August 18, 2016
    Applicant: Hitachi Automotive Systems, Inc.
    Inventors: Akihiko KUDO, Mutsumi KIKUCHI, Akihiko EMORI, Akihiro MACHIDA
  • Publication number: 20160233560
    Abstract: An object of the present invention is to provide a technology with which the time of stopping operations of storage battery groups in performing preventive maintenance and maintenance works of storage batteries in a power storage system can be reduced. In the power storage system of the present invention, a storage battery panel 3 transmits a first signal (F1) based on monitoring of states of storage battery packs 4 to a superordinate relay panel 2, and the relay panel 2 transmits a second signal (F2) based on the first signal to a superordinate power control device 1. A maintenance device 5 transmits, based on an operation of designating a storage battery panel 3 to be maintained by a maintenance person, a third signal (M) to the superordinate relay panel 2 of the storage battery panel 3 to be maintained, and the relay panel 2 masks and invalidates the first signal from the storage battery panel 3 to be maintained or the second signal based on the first signal in accordance with the third signal.
    Type: Application
    Filed: September 17, 2014
    Publication date: August 11, 2016
    Applicant: Hitachi Chemical Company, Ltd.
    Inventors: Mitsuyoshi KANOH, Takashi HARA, Shoichi HIROTA, Akihiko EMORI
  • Patent number: 9404975
    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 12, 2014
    Date of Patent: August 2, 2016
    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: 9397374
    Abstract: A secondary battery module includes a battery information storage unit for storing electric characteristic information and usage history information of the secondary battery module. A battery information management device and a terminal device respectively include interfaces to be connected to the secondary battery module. The battery information management device is provided with a battery information database. The battery information management device is connected to the terminal device through a communications network. In this way, battery information stored in the battery information storage unit, which is acquired by the battery information management device and the terminal device, is accumulated in the battery information database. Moreover, the battery information management device grades the secondary battery module for reuse based on the battery information and a predetermined threshold.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: July 19, 2016
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Shuko Yamauchi, Youhei Kawahara, Akihiko Emori
  • Patent number: 9362759
    Abstract: In a battery device including a battery pack in which a plurality of cells are connected in series, there are provided a battery control circuit or a battery device capable of eliminating a fluctuation in the voltage or charged state which can occur between the cells, or preventing the cells from being maintained in an over-charged state for a long period. A plurality of cell groups each including a plurality of cells are connected in series to form a battery pack. Cell controller is provided to the respective cell groups operate with electricity supplied from the cell groups allocated thereto so as to monitor and control the state of the cells of the cell group. Battery pack controller controls the cell controller based on information from the plurality of cell controller.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: June 7, 2016
    Assignee: Hitachi Vehicle Energy, Ltd.
    Inventors: Ryouhei Nakao, Youhei Kawahara, Akihiko Kudou, Akihiko Emori, Kei Sakabe
  • Patent number: 9356453
    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: December 20, 2011
    Date of Patent: May 31, 2016
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Akihiko Kudo, Mutsumi Kikuchi, Akihiko Emori, Akihiro Machida
  • Patent number: 9356451
    Abstract: A battery control circuit includes a voltage detection circuit for measuring voltages of electric cells, balancing circuits for balancing the voltages or SOCs of the electric cells, a signal input/output circuit for communicating with the outside, a power supply circuit having two modes: a normal mode and a low consumption mode, and a time management circuit. It receives a signal containing a period of time until the shift of the power supply circuit from the normal mode to the low consumption mode, and stores it in the time management circuit. If a command from the outside has not been sent for a predetermined period of time or when an operation stop command has been sent from the outside, the time management circuit causes the power supply circuit to continuously operate in the normal mode.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: May 31, 2016
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Youhei Kawahara, Ryouhei Nakao, Akihiko Kudo, Akihiko Emori, Kei Sakabe
  • Patent number: 9340122
    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: Grant
    Filed: August 18, 2011
    Date of Patent: May 17, 2016
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Tatsumi Yamauchi, Akihiro Machida, Akihiko Kudo, Akihiko Emori, Mutsumi Kikuchi
  • Patent number: 9333874
    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: March 18, 2015
    Date of Patent: May 10, 2016
    Assignees: Hitachi, Ltd., Hitachi Automotive Systems, Ltd.
    Inventors: Kenji Kubo, Akihiko Kudo, Mutsumi Kikuchi, Akihiko Emori
  • Patent number: 9293937
    Abstract: An electric storage device includes an assembled battery including a plurality of electric cells connected in series; an assembled battery control unit that estimates internal resistances of the plurality of electric cells, or a magnitude relationship of the internal resistances of the plurality of electric cells; an assembled battery control unit that calculates such a discharge quantity that an SOC after the electric cells have been discharged becomes lower as the internal resistance of the electric cells, which is estimated by the assembled battery control unit, is larger, or as the magnitude relationship of the internal resistances of the electric cells is estimated to be larger by the assembled battery control unit, for each of the electric cells; and electric cell control units that discharge each of the plurality of electric cells on the basis of the discharge quantity calculated by the assembled battery control unit.
    Type: Grant
    Filed: April 18, 2011
    Date of Patent: March 22, 2016
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Youhei Kawahara, Ryouhei Nakao, Akihiko Kudo, Akihiko Emori, Keiichiro Okawa, Yoshinori Aoshima
  • Patent number: 9246337
    Abstract: A battery pack includes a plurality of battery units mutually connected in parallel, each including a cell group in which one or two or more secondary cells are connected in series, and a first current control element that is connected in series with this cell group, a first control means that controls the charging/discharging current for each battery unit by controlling the operation of the first current control element included in each of the battery unit; a voltage measurement means that measures the voltage of the cell group or cells included in each of the battery unit, and a diagnosis means that diagnoses a deterioration level or a fault of each battery unit on the basis of the voltage of the cell group or cells measured by the voltage measurement means.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: January 26, 2016
    Assignee: HITACHI, LTD.
    Inventors: Hiroshi Iwasawa, Akihiko Emori, Yutaka Kobayashi, Ko Takahashi, Akihiko Kanouda
  • Patent number: 9130379
    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 devices 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: Grant
    Filed: September 25, 2008
    Date of Patent: September 8, 2015
    Assignees: Hitachi, Ltd., Hitachi Automotive Systems, Ltd.
    Inventors: Kei Sakabe, Akihiko Emori, Akihiko Kudo, Kenji Kubo, Youhei Kawahara, Mutsumi Kikuchi, Tatsumi Yamauchi