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).
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Patent number: 11448704Abstract: 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: GrantFiled: January 10, 2019Date of Patent: September 20, 2022Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Hiroaki Takechi, Tomomi Kataoka
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Publication number: 20220255144Abstract: A battery information management system includes: a battery characteristic calculation unit calculating a battery characteristic for each of a plurality of unit cells; a transmission unit transmitting value information that includes the battery characteristic of each unit cell, unit cell identification information, and time information; and a distributed-type database network recording the value information of each unit cell. A specific node of the distributed-type database network includes a reception unit configured to receive the value information transmitted from the transmission unit, and a transaction delivery unit configured to deliver, to the plurality of nodes, a transaction of recording the value information.Type: ApplicationFiled: June 22, 2020Publication date: August 11, 2022Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Shinichi OKANO, Koji ARAI, Aoi HATANAKA, Tomomi KATAOKA, Hiroaki TAKECHI, Takahiro MATSUURA
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Patent number: 11313911Abstract: 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: GrantFiled: March 19, 2019Date of Patent: April 26, 2022Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Tomomi Kataoka, Hiroaki Takechi
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Publication number: 20220020082Abstract: 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: ApplicationFiled: September 20, 2019Publication date: January 20, 2022Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Tomomi KATAOKA, Hiroaki TAKECHI, Aoi HATANAKA
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Publication number: 20210367277Abstract: 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: ApplicationFiled: February 18, 2019Publication date: November 25, 2021Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventor: Hiroaki TAKECHI
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Publication number: 20210190876Abstract: 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: ApplicationFiled: January 10, 2019Publication date: June 24, 2021Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Hiroaki TAKECHI, Tomomi KATAOKA
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Publication number: 20210184278Abstract: 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: ApplicationFiled: August 28, 2018Publication date: June 17, 2021Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Tomomi KATAOKA, Hiroaki TAKECHI
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Publication number: 20210123980Abstract: 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: ApplicationFiled: March 19, 2019Publication date: April 29, 2021Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Tomomi KATAOKA, Hiroaki TAKECHI
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Publication number: 20200412146Abstract: 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: ApplicationFiled: November 9, 2018Publication date: December 31, 2020Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventor: Hiroaki TAKECHI
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Internal resistance calculation device, recording medium, and internal resistance calculation method
Patent number: 10656213Abstract: 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: GrantFiled: June 23, 2016Date of Patent: May 19, 2020Assignee: Sumitomo Electric Industries, Ltd.Inventors: Hiroaki Takechi, Tomomi Kataoka, Youhei Yamaguchi, Aoi Hatanaka -
Patent number: 10408864Abstract: 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: GrantFiled: June 29, 2016Date of Patent: September 10, 2019Assignee: Sumitomo Electric Industries, Ltd.Inventors: Youhei Yamaguchi, Tomomi Kataoka, Keiichi Kawano, Takahiro Matsuura, Hiroaki Takechi
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Patent number: 10309841Abstract: 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: GrantFiled: October 1, 2015Date of Patent: June 4, 2019Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventor: Hiroaki Takechi
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Publication number: 20190094305Abstract: 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: ApplicationFiled: January 24, 2017Publication date: March 28, 2019Inventor: Hiroaki Takechi
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Publication number: 20180306845Abstract: 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: ApplicationFiled: June 29, 2016Publication date: October 25, 2018Inventors: Youhei Yamaguchi, Tomomi Kataoka, Keiichi Kawano, Takahiro Matsuura, Hiroaki Takechi
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INTERNAL RESISTANCE CALCULATION DEVICE, RECORDING MEDIUM, AND INTERNAL RESISTANCE CALCULATION METHOD
Publication number: 20180252776Abstract: 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: ApplicationFiled: June 23, 2016Publication date: September 6, 2018Inventors: Hiroaki Takechi, Tomomi Kataoka, Youhei Yamaguchi, Aoi Hatanaka -
Publication number: 20170328786Abstract: 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: ApplicationFiled: October 1, 2015Publication date: November 16, 2017Inventor: Hiroaki Takechi
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Patent number: 9735415Abstract: 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: GrantFiled: March 31, 2014Date of Patent: August 15, 2017Assignee: Samsung SDI Co., Ltd.Inventors: Jae-Woo Kam, Hiroaki Takechi, Won-Chull Han
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Patent number: 9653929Abstract: 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: GrantFiled: April 14, 2014Date of Patent: May 16, 2017Assignee: Samsung SDI Co., Ltd.Inventors: Jae-Woo Kam, Hiroaki Takechi, Won-Chull Han
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Publication number: 20150194823Abstract: 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: ApplicationFiled: December 18, 2014Publication date: July 9, 2015Inventors: Jae-Woo Kam, Hiroaki Takechi, Won-Chull Han
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Publication number: 20150130418Abstract: 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: ApplicationFiled: April 14, 2014Publication date: May 14, 2015Applicant: Samsung SDI Co., Ltd.Inventors: Jae-Woo Kam, Hiroaki Takechi, Won-Chull Han