Patents by Inventor Masahiro Yonemoto
Masahiro Yonemoto 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: 11532841Abstract: 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: GrantFiled: December 28, 2020Date of Patent: December 20, 2022Assignee: Vehicle Energy Japan Inc.Inventors: Shin Yamauchi, Kei Sakabe, Masahiro Yonemoto, Takanori Yamazoe, Keiichiro Ohkawa, Ryohhei Nakao
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Patent number: 11515579Abstract: To sufficiently exert charging and discharging performance of a cell while reliably protecting the cell, a battery controller determines ?Vlimit which is a limit value for a difference between a CCV and an OCV of a cell module, which is a secondary cell, and determines at least one of an upper limit voltage and a lower limit voltage of the cell module. An allowable current of the cell module is calculated based on the ?Vlimit and at least one of the upper limit voltage and the lower limit voltage determined in this manner.Type: GrantFiled: December 2, 2016Date of Patent: November 29, 2022Assignee: VEHICLE ENERGY JAPAN, INC.Inventors: Kei Sakabe, Keiichiro Ohkawa, Ryohhei Nakao, Masahiro Yonemoto
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Patent number: 11247581Abstract: 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: GrantFiled: May 18, 2020Date of Patent: February 15, 2022Assignee: VEHICLE ENERGY JAPAN, INC.Inventors: Kei Sakabe, Keiichiro Ohkawa, Takanori Yamazoe, Ryohhei Nakao, Masahiro Yonemoto
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Patent number: 11226376Abstract: 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: GrantFiled: August 8, 2016Date of Patent: January 18, 2022Assignee: Vehicle Energy Japan Inc.Inventors: Shin Yamauchi, Kei Sakabe, Masahiro Yonemoto, Takanori Yamazoe, Keiichiro Ohkawa, Ryohhei Nakao
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Patent number: 11084385Abstract: In an existing permissible current computation algorithm, an excessive current is caused to flow by controlling the battery having a steep change region in the battery characteristic. On the other hand, when the current is reduced and the output is suppressed, the battery performance cannot be sufficiently utilized. Moreover, with countermeasures to increase the number of data points, the amount of data increases and thus can not be installed in the microcomputer.Type: GrantFiled: July 28, 2017Date of Patent: August 10, 2021Assignee: VEHICLE ENERGY JAPAN INC.Inventors: Daiki Komatsu, Kei Sakabe, Masahiro Yonemoto, Shin Yamauchi, Keiichiro Ohkawa, Ryohhei Nakao
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Publication number: 20210119272Abstract: 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: ApplicationFiled: December 28, 2020Publication date: April 22, 2021Inventors: Shin YAMAUCHI, Kei SAKABE, Masahiro YONEMOTO, Takanori YAMAZOE, Keiichiro OHKAWA, Ryohhei NAKAO
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Patent number: 10879570Abstract: 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: GrantFiled: August 8, 2016Date of Patent: December 29, 2020Assignee: Vehicle Energy Japan Inc.Inventors: Shin Yamauchi, Kei Sakabe, Masahiro Yonemoto, Takanori Yamazoe, Keiichiro Ohkawa, Ryohhei Nakao
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Patent number: 10818983Abstract: 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: GrantFiled: August 8, 2016Date of Patent: October 27, 2020Assignee: VEHICLE ENERGY JAPAN, INC.Inventors: Masahiro Yonemoto, Kei Sakabe, Takanori Yamazoe, Shin Yamauchi, Keiichiro Ohkawa, Ryohhei Nakao
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Patent number: 10807494Abstract: The state of internal resistance is appropriately expressed for a battery being energized. A battery management system includes a battery information acquisition section, a voltage calculation section, a current fluctuation amount calculation section 109 and a resistance correction amount calculation section. The battery information acquisition section acquires a voltage value V of a storage battery being energized. The voltage calculation section acquires a predicted battery voltage value Vmodel of the storage battery being energized by a method different from that of the battery information acquisition section. The current fluctuation amount calculation section calculates a current fluctuation amount dI/dt of the storage battery per unit time.Type: GrantFiled: February 1, 2017Date of Patent: October 20, 2020Assignee: Vehicle Energy Japan Inc.Inventors: Masahiro Yonemoto, Kei Sakabe, Ryohhei Nakao, Keiichiro Ohkawa, Daiki Komatsu
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Publication number: 20200280204Abstract: 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: ApplicationFiled: May 18, 2020Publication date: September 3, 2020Applicant: VEHICLE ENERGY JAPAN, INC.Inventors: Kei SAKABE, Keiichiro OHKAWA, Takanori YAMAZOE, Ryohhei NAKAO, Masahiro YONEMOTO
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Patent number: 10725111Abstract: A battery state detection device detects a battery state and includes: a first permissible current calculating unit configured to calculate a first permissible current of a battery based on a voltage of the battery detected by a voltage detecting unit; a second permissible current calculating unit configured to calculate a second permissible current of the battery without using the voltage of the battery; and a correction unit configured to compare the first permissible current and the second permissible current and to perform a predetermined correction process on the basis of the comparison result.Type: GrantFiled: June 12, 2015Date of Patent: July 28, 2020Assignee: Vehicle Energy Japan Inc.Inventors: Youhei Kawahara, Masahiro Yonemoto, Keiichiro Ohkawa
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Patent number: 10686229Abstract: A battery state detection device detects a battery state and includes: a first permissible current calculating unit configured to calculate a first permissible current of a battery based on a voltage of the battery detected by a voltage detecting unit; a second permissible current calculating unit configured to calculate a second permissible current of the battery without using the voltage of the battery; and a permissible current determining unit configured to determine a permissible current of the battery corresponding to the battery state on the basis of at least one of the first permissible current and the second permissible current.Type: GrantFiled: June 12, 2015Date of Patent: June 16, 2020Assignee: Vehicle Energy Japan Inc.Inventors: Youhei Kawahara, Masahiro Yonemoto, Keiichiro Ohkawa
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Patent number: 10680453Abstract: 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: GrantFiled: April 27, 2016Date of Patent: June 9, 2020Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Kei Sakabe, Keiichiro Ohkawa, Takanori Yamazoe, Ryohhei Nakao, Masahiro Yonemoto
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Patent number: 10591550Abstract: A secondary-battery monitoring device includes: a use-state memory device that stores a transition of a load parameter indicating a use state of a secondary battery; and a battery capacity prediction device that predicts a temporal change of a battery capacity of the secondary battery on the basis of a prediction function. The prediction function is derived from a relation between growth of a film formed in an electrode surface of the secondary battery and a reduction of a precursor component of the film which is contained in an electrolyte of the secondary battery. The battery capacity prediction device determines a coefficient of the prediction function on the basis of the transition of the load parameter which is stored in the use-state memory device, and predicts the temporal change of the battery capacity of the secondary battery on the basis of the prediction function which uses the coefficient.Type: GrantFiled: April 28, 2015Date of Patent: March 17, 2020Assignee: VEHICLE ENERGY JAPAN INC.Inventors: Masahiro Yonemoto, Youhei Kawahara, Takeshi Inoue, Keiichiro Ohkawa
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Publication number: 20190242948Abstract: In an existing permissible current computation algorithm, an excessive current is caused to flow by controlling the battery having a steep change region in the battery characteristic. On the other hand, when the current is reduced and the output is suppressed, the battery performance cannot be sufficiently utilized. Moreover, with countermeasures to increase the number of data points, the amount of data increases and thus can not be installed in the microcomputer.Type: ApplicationFiled: July 28, 2017Publication date: August 8, 2019Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Daiki KOMATSU, Kei SAKABE, Masahiro YONEMOTO, Shin YAMAUCHI, Keiichiro OHKAWA, Ryohhei NAKAO
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Publication number: 20190023132Abstract: The state of internal resistance is appropriately expressed for a battery being energized. A battery management system includes a battery information acquisition section, a voltage calculation section, a current fluctuation amount calculation section 109 and a resistance correction amount calculation section. The battery information acquisition section acquires a voltage value V of a storage battery being energized. The voltage calculation section acquires a predicted battery voltage value Vmodel of the storage battery being energized by a method different from that of the battery information acquisition section. The current fluctuation amount calculation section calculates a current fluctuation amount dI/dt of the storage battery per unit time.Type: ApplicationFiled: February 1, 2017Publication date: January 24, 2019Inventors: Masahiro YONEMOTO, Kei SAKABE, Ryohhei NAKAO, Keiichiro OHKAWA, Daiki KOMATSU
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Publication number: 20180375176Abstract: To sufficiently exert charging and discharging performance of a cell while reliably protecting the cell, a battery controller determines ?Vlimit which is a limit value for a difference between a CCV and an OCV of a cell module, which is a secondary cell, and determines at least one of an upper limit voltage and a lower limit voltage of the cell module. An allowable current of the cell module is calculated based on the ?Vlimit and at least one of the upper limit voltage and the lower limit voltage determined in this manner.Type: ApplicationFiled: December 2, 2016Publication date: December 27, 2018Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Kei SAKABE, Keiichiro OHKAWA, Ryohhei NAKAO, Masahiro YONEMOTO
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Publication number: 20180358663Abstract: 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: ApplicationFiled: August 8, 2016Publication date: December 13, 2018Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Masahiro YONEMOTO, Kei SAKABE, Takanori YAMAZOE, Shin YAMAUCHI, Keiichiro OHKAWA, Ryohhei NAKAO
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Publication number: 20180226824Abstract: 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: ApplicationFiled: April 27, 2016Publication date: August 9, 2018Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Kei SAKABE, Keiichiro OHKAWA, Takanori YAMAZOE, Ryohhei NAKAO, Masahiro YONEMOTO
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Publication number: 20180210036Abstract: 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: ApplicationFiled: August 8, 2016Publication date: July 26, 2018Inventors: Shin YAMAUCHI, Kei SAKABE, Masahiro YONEMOTO, Takanori YAMAZOE, Keiichiro OHKAWA, Ryohhei NAKAO