Patents by Inventor Hiroaki Takechi

Hiroaki Takechi 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: 11313911
    Abstract: A parameter estimation device includes: a voltage acquisition unit; a current acquisition unit; a parameter estimation unit; an internal resistance deriving unit; and a determination unit configured to determine, on the basis of a result of comparison between the internal resistance estimated by the parameter estimation unit and the internal resistance derived by the internal resistance deriving unit, whether or not to replace parameters of the secondary battery with the plurality of parameters estimated by the parameter estimation unit.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: April 26, 2022
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Tomomi Kataoka, Hiroaki Takechi
  • Publication number: 20220020082
    Abstract: A rental information generation device includes: a requirement information acquisition unit configured to acquire requirement information of a user regarding use of an electric vehicle equipped with a secondary battery; a stock information acquisition unit configured to acquire stock information of objects including at least either one of a secondary battery and an electric vehicle; a decision unit configured to decide an object selection condition on the basis of the acquired requirement information and stock information; and a generation unit configured to generate rental information regarding an object to be rented out to the user on the basis of the decided selection condition.
    Type: Application
    Filed: September 20, 2019
    Publication date: January 20, 2022
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Tomomi KATAOKA, Hiroaki TAKECHI, Aoi HATANAKA
  • Publication number: 20210367277
    Abstract: A battery management device that is connected to a secondary battery including a plurality of unit cells and that is configured to process information indicating a characteristic of the secondary battery includes: a calculation unit configured to calculate, for each unit cell, a battery characteristic of the secondary battery; and a recording unit configured to record the battery characteristic of each unit cell calculated by the calculation unit, in association with unit cell identification information for identifying the unit cell, and time information indicating a time at which the battery characteristic has been calculated.
    Type: Application
    Filed: February 18, 2019
    Publication date: November 25, 2021
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Hiroaki TAKECHI
  • Publication number: 20210190876
    Abstract: A parameter estimation device configured to estimate a parameter of an equivalent circuit model of a secondary battery includes: a voltage acquisition unit configured to acquire a voltage of the secondary battery in a time-series manner; a current acquisition unit configured to acquire a charge/discharge current of the secondary battery in a time-series manner; an estimation unit configured to estimate the parameter on the basis of the voltage acquired by the voltage acquisition unit and the charge/discharge current acquired by the current acquisition unit; and a prohibition unit configured to prohibit the estimation of the parameter performed by the estimation unit, on the basis of the charge/discharge current acquired by the current acquisition unit or the voltage acquired by the voltage acquisition unit.
    Type: Application
    Filed: January 10, 2019
    Publication date: June 24, 2021
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Hiroaki TAKECHI, Tomomi KATAOKA
  • Publication number: 20210184278
    Abstract: A battery monitoring device includes: a voltage acquisition unit acquiring unit cells voltages; a current acquisition unit acquiring a secondary battery charge/discharge current; a first state-of-charge calculation unit calculating a charge first state on a first voltage basis acquired at a first time at which a predetermined switch is OFF, in a first trip period; a second state-of-charge calculation unit calculating a charge second state on a second voltage basis acquired at a second time at which the switch is OFF, in a second trip period; a charge/discharge amount calculation unit calculating a secondary battery charge/discharge amount from the first to second time; a full charge capacity calculation unit calculating each unit cell unit full charge capacity on the basis of the charge first and second states, and the charge/discharge amount; and an update unit updating a second battery full charge capacity on the calculated unit full charge capacity basis.
    Type: Application
    Filed: August 28, 2018
    Publication date: June 17, 2021
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Tomomi KATAOKA, Hiroaki TAKECHI
  • Publication number: 20210123980
    Abstract: A parameter estimation device includes: a voltage acquisition unit; a current acquisition unit; a parameter estimation unit; an internal resistance deriving unit; and a determination unit configured to determine, on the basis of a result of comparison between the internal resistance estimated by the parameter estimation unit and the internal resistance derived by the internal resistance deriving unit, whether or not to replace parameters of the secondary battery with the plurality of parameters estimated by the parameter estimation unit.
    Type: Application
    Filed: March 19, 2019
    Publication date: April 29, 2021
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Tomomi KATAOKA, Hiroaki TAKECHI
  • Publication number: 20200412146
    Abstract: A battery monitoring device for a vehicle acquires a voltage, a current, and a temperature of each of a plurality of unit cells, and transmits unit cell information including the acquired voltage, current, and temperature of each unit cell and an identifier of each of the unit cells, to a state calculation device outside the vehicle and configured to calculate each of states of the plurality of unit cells. The state calculation device receives the unit cell information transmitted from the battery monitoring device, calculates each of the states of the plurality of unit cells on the basis of the received voltage, current, and temperature of each unit cell, and transmits calculated state information of each unit cell and the identifier of each of the unit cells to the battery monitoring device or an on-vehicle control device configured to perform control regarding charging/discharging of a secondary battery.
    Type: Application
    Filed: November 9, 2018
    Publication date: December 31, 2020
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Hiroaki TAKECHI
  • Patent number: 10656213
    Abstract: An internal resistance calculation device is provided with: a voltage obtaining portion that obtains the voltage of a secondary battery; a current obtaining portion that obtains the current of the secondary battery; a switching determination portion that determines the presence or absence of switching between charging and discharging of the secondary battery based on the obtained current; an identification portion that identifies a waiting time based on a boundary frequency range in which the diffusion impedance arising from the process of diffusion of a predetermined ion contributes to the impedance of the secondary battery in the impedance spectrum of the secondary battery; and a resistance calculation portion that calculates the internal resistance of the secondary battery based on the voltage and the current obtained after the identified waiting time in a case where it is determined that switching between charging and discharging of the secondary battery is present.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: May 19, 2020
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Hiroaki Takechi, Tomomi Kataoka, Youhei Yamaguchi, Aoi Hatanaka
  • Patent number: 10408864
    Abstract: A voltage measuring apparatus that individually measures voltages of n-pieces (2?n) of power storage elements B(1) to B(n) connected in series includes: first to n-th voltage detecting units that respectively individually measure voltages of the power storage elements; a switching circuit that switches a connection state between the power storage elements and the first to n-th voltage detecting units; a SW control unit that drives the switching circuit; and an operation processing unit. The power storage elements are arranged in order so that potential becomes higher as n increases. The switching circuit includes a capacitor connected in parallel to the power storage element B(1). In the switching circuit, the negative terminals of the power storage elements are connected to a first terminal of the capacitor via respective corresponding first switches. The positive terminals of the power storage elements are connected to a second terminal of the capacitor via respective corresponding second switches.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: September 10, 2019
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Youhei Yamaguchi, Tomomi Kataoka, Keiichi Kawano, Takahiro Matsuura, Hiroaki Takechi
  • Patent number: 10309841
    Abstract: A temperature detecting apparatus includes a thermistor; a resistor connected in series to the thermistor; a temperature detector connected to a first node between the thermistor and the resistor; and a switch circuit including a first switch, a second switch, a third switch, and a fourth switch. The first switch and the third switch are connected in series, the second switch and the fourth switch are connected in series, the first switch and the second switch are connected to a power side, the third switch and the fourth switch are connected to a ground side, the thermistor is connected to a second node between the first switch and the third switch, and the resistor is connected to a third node between the second switch and the fourth switch.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: June 4, 2019
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Hiroaki Takechi
  • Publication number: 20190094305
    Abstract: An amount of charge calculation device, includes: a voltage obtaining portion obtaining a voltage of a secondary battery; a current obtaining portion obtaining a current of the secondary battery; a first calculation portion calculating a first amount of charge of the secondary battery by integrating the obtained current; a second calculation portion calculating a second amount of charge of the secondary battery, on the basis of the obtained voltage and current, and an equivalent circuit model of the secondary battery; and a determination portion determining whether or not a predetermined condition is satisfied, in which in a case where the determination portion determines that the predetermined condition is not satisfied, the first amount of charge is set to the amount of charge of the secondary battery, and in a case where the determination portion determines that the predetermined condition is satisfied, the second amount of charge is set to the amount of charge of the secondary battery.
    Type: Application
    Filed: January 24, 2017
    Publication date: March 28, 2019
    Inventor: Hiroaki Takechi
  • Publication number: 20180306845
    Abstract: A voltage measuring apparatus that individually measures voltages of n-pieces (2?n) of power storage elements B(1) to B(n) connected in series includes: first to n-th voltage detecting units that respectively individually measure voltages of the power storage elements; a switching circuit that switches a connection state between the power storage elements and the first to n-th voltage detecting units; a SW control unit that drives the switching circuit; and an operation processing unit. The power storage elements are arranged in order so that potential becomes higher as n increases. The switching circuit includes a capacitor connected in parallel to the power storage element B(1). In the switching circuit, the negative terminals of the power storage elements are connected to a first terminal of the capacitor via respective corresponding first switches. The positive terminals of the power storage elements are connected to a second terminal of the capacitor via respective corresponding second switches.
    Type: Application
    Filed: June 29, 2016
    Publication date: October 25, 2018
    Inventors: Youhei Yamaguchi, Tomomi Kataoka, Keiichi Kawano, Takahiro Matsuura, Hiroaki Takechi
  • Publication number: 20180252776
    Abstract: An internal resistance calculation device is provided with: a voltage obtaining portion that obtains the voltage of a secondary battery; a current obtaining portion that obtains the current of the secondary battery; a switching determination portion that determines the presence or absence of switching between charging and discharging of the secondary battery based on the obtained current; an identification portion that identifies a waiting time based on a boundary frequency range in which the diffusion impedance arising from the process of diffusion of a predetermined ion contributes to the impedance of the secondary battery in the impedance spectrum of the secondary battery; and a resistance calculation portion that calculates the internal resistance of the secondary battery based on the voltage and the current obtained after the identified waiting time in a case where it is determined that switching between charging and discharging of the secondary battery is present.
    Type: Application
    Filed: June 23, 2016
    Publication date: September 6, 2018
    Inventors: Hiroaki Takechi, Tomomi Kataoka, Youhei Yamaguchi, Aoi Hatanaka
  • Publication number: 20170328786
    Abstract: A temperature detecting apparatus includes a thermistor; a resistor connected in series to the thermistor: a temperature detector connected to a first node between the thermistor and the resistor; and a switch circuit including a first switch, a second switch, a third switch, and a fourth switch. The first switch and the third switch are connected in series, the second switch and the fourth switch are connected in series, the first switch and the second switch are connected to a power side, the third switch and the fourth switch are connected to a ground side, the thermistor is connected to a second node between the first switch and the third switch, and the resistor is connected to a third node between the second switch and the fourth switch.
    Type: Application
    Filed: October 1, 2015
    Publication date: November 16, 2017
    Inventor: Hiroaki Takechi
  • Patent number: 9735415
    Abstract: A method for protecting batteries with consideration for the influence of a load coupled to a battery pack is provided. The battery pack includes a terminal to be coupled to a capacitor of the load, and a battery management system for controlling a protection operation according to a voltage of the terminal, counting a number of protection operation executions after the load is coupled to the battery pack, and differently controlling a deactivation time of the protection operations depending on whether or not the number of executions is greater than or equal to a reference count.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: August 15, 2017
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jae-Woo Kam, Hiroaki Takechi, Won-Chull Han
  • Patent number: 9653929
    Abstract: A battery charging apparatus and charging method thereof are disclosed. In one aspect, the apparatus includes a battery including a battery pack including at least one battery cell, a battery management system (BMS) configured to control the generation of a terminal voltage based on a type of the battery pack, and a terminal unit including electrodes configured to receive the terminal voltage. The apparatus further includes a charger including a controller configured to determine the type of the battery pack based on the terminal voltage and control the generation of a charging voltage corresponding to the type of the battery pack.
    Type: Grant
    Filed: April 14, 2014
    Date of Patent: May 16, 2017
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jae-Woo Kam, Hiroaki Takechi, Won-Chull Han
  • Publication number: 20150194823
    Abstract: A battery charging device includes: a charging unit coupled to a battery module, the battery module including at least one battery cell, wherein the charging unit is configured to charge the battery module; and a charge controller configured to: receive, from a battery management system managing to battery module, measurement information indicating whether or not an open circuit voltage (OCV) value of the battery module is within a predetermined voltage section; and transmit a discharge start signal to the battery management system to discharge the battery module in response to a value of the measurement information exceeding a predetermined number.
    Type: Application
    Filed: December 18, 2014
    Publication date: July 9, 2015
    Inventors: Jae-Woo Kam, Hiroaki Takechi, Won-Chull Han
  • Publication number: 20150130424
    Abstract: A method for protecting batteries with consideration for the influence of a load coupled to a battery pack is provided. The battery pack includes a terminal to be coupled to a capacitor of the load, and a battery management system for controlling a protection operation according to a voltage of the terminal, counting a number of protection operation executions after the load is coupled to the battery pack, and differently controlling a deactivation time of the protection operations depending on whether or not the number of executions is greater than or equal to a reference count.
    Type: Application
    Filed: March 31, 2014
    Publication date: May 14, 2015
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Jae-Woo Kam, Hiroaki Takechi, Won-Chull Han
  • Publication number: 20150134169
    Abstract: An apparatus includes a controller to output a signal through an interface. The signal may control at least one parameter of a motor based on a state of capacity degradation of a battery for driving the motor. The at least one parameter may be motor torque. Also, the signal may include a value indicative of a capacity degradation of a battery for driving a motor. The capacity degradation of the battery may be determined based on a number of charging and/or discharging operations performed for the battery.
    Type: Application
    Filed: October 7, 2014
    Publication date: May 14, 2015
    Inventors: Jae-Woo KAM, Hiroaki TAKECHI, Won-Chull HAN
  • Publication number: 20150130418
    Abstract: A battery charging apparatus and charging method thereof are disclosed. In one aspect, the apparatus includes a battery including a battery pack including at least one battery cell, a battery management system (BMS) configured to control the generation of a terminal voltage based on a type of the battery pack, and a terminal unit including electrodes configured to receive the terminal voltage. The apparatus further includes a charger including a controller configured to determine the type of the battery pack based on the terminal voltage and control the generation of a charging voltage corresponding to the type of the battery pack.
    Type: Application
    Filed: April 14, 2014
    Publication date: May 14, 2015
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Jae-Woo Kam, Hiroaki Takechi, Won-Chull Han