Patents by Inventor Takanori Yamazoe

Takanori Yamazoe 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: 10319218
    Abstract: There is provided a wireless battery system reconcilable with unsuccessful communication due to interference from an external wireless instrument or radio wave reflection or shielding under a surrounding physical environment. A wireless battery system allocates a cell controller to a cell, detects a cell state, and wirelessly communicates a cell state detected by a cell controller to a battery controller. During the wireless communication, the battery controller transmits a beacon to the cell controller and specifies a duration for radio wave environment measurement and a frequency to be measured as a condition. The cell controller performs radio wave environment measurement under the specified condition and then returns a measurement result along with the cell state to the battery controller.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: June 11, 2019
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Kei Sakabe, Takanori Yamazoe, Hiroshi Arita
  • Patent number: 10193190
    Abstract: A battery control system is provided with a plurality of battery cell management devices that are provided respectively corresponding to a plurality of battery cell groups each constituted by one or a plurality of battery cells and each acquire a measurement result of the state of charge of the battery cell of the corresponding battery cell group and an assembled battery management device for wirelessly communicating with the battery cell management devices. When it is impossible to wirelessly communicate with any of the battery cell management devices, the assembled battery management device wirelessly communicates with the said any of the battery cell management devices via any of other battery cell management devices except the said any of the battery cell management devices.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: January 29, 2019
    Assignee: HITACHI, LTD.
    Inventors: Takanori Yamazoe, Shuko Yamauchi
  • Publication number: 20180358663
    Abstract: Provided is a battery management device capable of effectively utilizing battery performance while securing battery life. The battery management device includes: a divergence amount calculation unit that calculates a divergence amount between a life target value or a degradation amount target value of a storage battery, which is a secondary battery, and a life prediction value or a degradation amount prediction value according to use history of the storage battery in an arbitrary period; and a limit value change unit that changes charge/discharge limit values for controlling degradation of the storage battery based on the divergence amount. The limit value change unit includes a first limit value calculation unit that calculates a first limit value set that is a combination of the charge/discharge limit values for each of a plurality of types of control parameters that change in correlation with each other based on the divergence amount.
    Type: Application
    Filed: August 8, 2016
    Publication date: December 13, 2018
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Masahiro YONEMOTO, Kei SAKABE, Takanori YAMAZOE, Shin YAMAUCHI, Keiichiro OHKAWA, Ryohhei NAKAO
  • Publication number: 20180246172
    Abstract: In a power storage system equipped with a secondary battery, a control system of the secondary battery includes a unit which detects an index indicating a degradation state of a positive electrode, a unit which detects an index indicating a degradation state of a negative electrode, a unit which calculates a difference between the index of the positive electrode and the index of the negative electrode, a unit which determines a sign of the difference, and a unit which changes an operation condition of the secondary battery according to the sign. With this configuration, in the control of the secondary battery, it is possible to avoid a life estimation accuracy from being decreased while using a processor which has a high-speed processing performance and inexpensive.
    Type: Application
    Filed: June 16, 2016
    Publication date: August 30, 2018
    Applicant: HITACHI, LTD.
    Inventors: Makoto ABE, Takanori YAMAZOE
  • Publication number: 20180226824
    Abstract: A battery control device capable of obtaining an allowable charge/discharge current value can further accurately reflect a polarization state of a battery. A battery controller includes a first allowable current value calculation unit, a battery equivalent circuit model, and a correction amount calculation unit. Assuming a non-polarization state, a current limit value of the battery based on an open circuit voltage and upper and lower limit voltages set in the battery, the first allowable current value calculation unit calculates a first allowable current value Imax1. The battery equivalent circuit model estimates a polarization state of the battery when the current limit value is being calculated. The correction unit calculates an allowable current value correction value based on the estimated polarization state for correcting Imax1. A second allowable current value Imax2 which is the corrected first allowable current value is output as an allowable charge/discharge current value of the battery.
    Type: Application
    Filed: April 27, 2016
    Publication date: August 9, 2018
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Kei SAKABE, Keiichiro OHKAWA, Takanori YAMAZOE, Ryohhei NAKAO, Masahiro YONEMOTO
  • Publication number: 20180210036
    Abstract: To perform charge/discharge control of a storage battery at an appropriate timing. In a battery controller, a battery information acquisition unit acquires information on the storage battery. A degradation progression rate calculation unit calculates a degradation progression rate of the storage battery based on the information acquired by the battery information acquisition unit. A limit value setting unit sets a limit value for controlling charge/discharge of the storage battery based on the degradation progression rate calculated by the degradation progression rate calculation unit. A timing determination unit determines a timing at which the limit value needs to be output based on the information acquired by the battery information acquisition unit. A limit value output unit outputs the limit value to a host controller based on the timing determined by the timing determination unit.
    Type: Application
    Filed: August 8, 2016
    Publication date: July 26, 2018
    Inventors: Shin YAMAUCHI, Kei SAKABE, Masahiro YONEMOTO, Takanori YAMAZOE, Keiichiro OHKAWA, Ryohhei NAKAO
  • Publication number: 20180198175
    Abstract: A current of a storage battery is appropriately controlled depending on the situation. In a battery controller, a battery information acquiring unit acquires information on the storage battery. A first allowable current calculating unit calculates a first allowable current of a battery module in accordance with a rated value of a component through which a current flows by charging or discharging of the battery module. A second allowable current calculating unit calculates a second allowable current of the battery module in accordance with an SOC of the battery module on the basis of the information acquired by the battery information acquiring unit. A third allowable current calculating unit calculates a third allowable current of the battery module in accordance with an SOH of the battery module on the basis of the information acquired by the battery information acquiring unit.
    Type: Application
    Filed: August 8, 2016
    Publication date: July 12, 2018
    Inventors: Shin YAMAUCHI, Kei SAKABE, Masahiro YONEMOTO, Takanori YAMAZOE, Keiichiro OHKAWA, Ryohhei NAKAO
  • Patent number: 9987945
    Abstract: A radio battery system according to the present invention includes a battery controller and a plurality of cell controllers. The battery controller and the plurality of cell controllers communicate at a plurality of communication slots of a time division communication. The battery controller transmits data at a beginning of each of the plurality of communication slots. Each of the cell controllers measures a state of a cell at one or plurality of predetermined communication slots and transmits data at a predetermined communication slot. Each of the cell controllers is capable of switching between a normal transmission/reception mode and a sleep mode with a low power consumption.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: June 5, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Takanori Yamazoe, Kei Sakabe
  • Patent number: 9981559
    Abstract: The present invention has an object to provide a battery control system which can immediately notify an abnormality to a battery system controller when a battery abnormality occurs. The battery control system according to the invention includes a first communication unit which transmits battery data using a first radio frequency and a second communication unit which transmits abnormality data using a second radio frequency. The first communication unit transmits the battery data at a predetermined period. The second communication unit transmits the abnormality data when the battery abnormality is detected.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: May 29, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Mitsutoshi Honda, Takanori Yamazoe
  • Publication number: 20180012484
    Abstract: There is provided a wireless battery system reconcilable with unsuccessful communication due to interference from an external wireless instrument or radio wave reflection or shielding under a surrounding physical environment. A wireless battery system allocates a cell controller to a cell, detects a cell state, and wirelessly communicates a cell state detected by a cell controller to a battery controller. During the wireless communication, the battery controller transmits a beacon to the cell controller and specifies a duration for radio wave environment measurement and a frequency to be measured as a condition. The cell controller performs radio wave environment measurement under the specified condition and then returns a measurement result along with the cell state to the battery controller.
    Type: Application
    Filed: January 22, 2016
    Publication date: January 11, 2018
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Kei SAKABE, Takanori YAMAZOE, Hiroshi ARITA
  • Publication number: 20170351561
    Abstract: An object of the invention is to improve communication quality in a power storage management system. The above-mentioned problem may be solved by the following one solution. When a communication error where transmission, reception, or both transmission and reception of a signal is not allowed occurs between one or a plurality of a plurality of information acquisition devices that acquires states of a plurality of power storage cells and an information collection device that communicates with the plurality of information acquisition devices in a time-division manner, and collects information related to the states of the plurality of power storage cells acquired by the plurality of respective information acquisition devices, a process for resolving a communication error is executed by putting all the plurality of information acquisition devices in a state in which communication with the information collection device is allowed at all times.
    Type: Application
    Filed: November 7, 2014
    Publication date: December 7, 2017
    Applicant: Hitachi, Ltd.
    Inventors: Takanori YAMAZOE, Mitsutoshi HONDA
  • 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: 20160341797
    Abstract: An object of the present invention is to provide a wireless communication technique which can measure a physical state of the measurement object with high accuracy and can transmit the measurement result rapidly. The communication device according to the present invention wirelessly transmits the measurement result during a first time slot, and starts measurement during a second time slot which differs from the first time slot (see FIG. 3).
    Type: Application
    Filed: March 26, 2014
    Publication date: November 24, 2016
    Inventors: Kei SAKABE, Takanori YAMAZOE
  • Publication number: 20160325626
    Abstract: The present invention has an object to provide a battery control system which can immediately notify an abnormality to a battery system controller when a battery abnormality occurs. The battery control system according to the invention includes a first communication unit which transmits battery data using a first radio frequency and a second communication unit which transmits abnormality data using a second radio frequency. The first communication unit transmits the battery data at a predetermined period. The second communication unit transmits the abnormality data when the battery abnormality is detected.
    Type: Application
    Filed: February 14, 2014
    Publication date: November 10, 2016
    Inventors: Mitsutoshi HONDA, Takanori YAMAZOE
  • Publication number: 20160301112
    Abstract: Communication distance can be extended in a battery system that transmits states of the battery cells by wireless communication. Each of cell controllers wirelessly transmits measurement result of states of battery cells in cell groups to a battery controller, by using an electric power supplied from the battery cells in the cell groups. The battery controller continuously transmits unmodulated carrier wave to each of the cell controllers. Each of the cell controllers changes an impedance for the unmodulated carrier wave transmitted from the battery controller at a predetermined timing in dependence on the measurement result of the states of the battery cells in the cell groups. Due to this, the measurement result of the states of the battery cells in the cell groups is wirelessly transmitted to the battery controller.
    Type: Application
    Filed: January 27, 2014
    Publication date: October 13, 2016
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Takanori YAMAZOE, Hiroshi IWASAWA, Takahide TERADA, Takashi TAKEUCHI, Mutsumi KIKUCHI, Akihiko KUDO, Tomonori KANAI
  • Publication number: 20160294019
    Abstract: A battery system includes: a battery cell group composed of one or more battery cells; a battery cell management device that is provided corresponding to each battery cell group and acquires a measurement result concerning a charge state of each battery cell of the battery cell group; and a battery pack management device that performs radio communication with the battery cell management device. In the radio communication, a plurality of radio frequencies can be used.
    Type: Application
    Filed: December 16, 2013
    Publication date: October 6, 2016
    Applicant: HITACHI, LTD.
    Inventors: Shuko YAMAUCHI, Takanori YAMAZOE
  • Publication number: 20160268642
    Abstract: A battery control system is provided with a plurality of battery cell management devices that are provided respectively corresponding to a plurality of battery cell groups each constituted by one or a plurality of battery cells and each acquire a measurement result of the state of charge of the battery cell of the corresponding battery cell group and an assembled battery management device for wirelessly communicating with the battery cell management devices. When it is impossible to wirelessly communicate with any of the battery cell management devices, the assembled battery management device wirelessly communicates with the said any of the battery cell management devices via any of other battery cell management devices except the said any of the battery cell management devices.
    Type: Application
    Filed: November 1, 2013
    Publication date: September 15, 2016
    Applicant: HITACHI, LTD.
    Inventors: Takanori YAMAZOE, Shuko YAMAUCHI
  • Publication number: 20160137091
    Abstract: A radio battery system according to the present invention includes a battery controller and a plurality of cell controllers. The battery controller and the plurality of cell controllers communicate at a plurality of communication slots of a time division communication. The battery controller transmits data at a beginning of each of the plurality of communication slots. Each of the cell controllers measures a state of a cell at one or plurality of predetermined communication slots and transmits data at a predetermined communication slot. Each of the cell controllers is capable of switching between a normal transmission/reception mode and a sleep mode with a low power consumption.
    Type: Application
    Filed: November 11, 2015
    Publication date: May 19, 2016
    Applicant: HITACHI, LTD.
    Inventors: Takanori YAMAZOE, Kei SAKABE
  • Publication number: 20160006343
    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: Application
    Filed: February 27, 2013
    Publication date: January 7, 2016
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Takahide TERADA, Mutsumi KIKUCHI, Akihiko KUDO, Takanori YAMAZOE, Hiroshi IWASAWA
  • Publication number: 20150357685
    Abstract: A battery system that is capable of transmitting the voltage value of each cell by means of wireless communication while suppressing costs and suppressing the number of components includes: a plurality of cells, each having a positive electrode terminal and a negative electrode terminal; voltage detection circuits that detect the voltages of the plurality cells; voltage detection lines that connect each of the positive electrode and negative electrode terminals of the cells to each voltage detection circuit; and an upper controller that performs wireless communication with the voltage detection circuits so as to receive, from each of the voltage detection circuits, the corresponding voltage of each cells. The voltage detection lines function as an antenna used to provide wireless communication between the voltage detection circuit and the upper controller.
    Type: Application
    Filed: January 27, 2014
    Publication date: December 10, 2015
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hiroshi IWASAWA, Takahide TERADA, Mutsumi KIKUCHI, Takanori YAMAZOE, Tomonori KANAI, Akihiko KUDO, Takashi TAKEUCHI