Patents by Inventor Takeshi Sada
Takeshi Sada 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: 10996280Abstract: A battery pack includes a secondary battery, a state of charge calculator, an integrated current amount calculator, a differential state of charge calculator, a full charge capacity calculator, and a charging-and-discharging control section. The differential state of charge calculator calculates a differential state of charge between a first state of charge at a first detection timing and a second state of charge at a second detection timing. The integrated current amount calculator calculates an integrated amount of a current flowing to the secondary battery in a subject period from the first detection timing to the second detection timing. The full charge capacity calculator calculates a full charge capacity of the secondary battery based on the differential state of charge and the integrated current amount. The charging-and-discharging control section is configured to restrict one of the charging and the discharging of the secondary battery during the subject period.Type: GrantFiled: July 15, 2019Date of Patent: May 4, 2021Assignee: DENSO CORPORATIONInventors: Yuki Tachibana, Yamato Utsunomiya, Takeshi Sada
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Patent number: 10886581Abstract: A battery pack includes a housing accommodating a plurality of batteries and a blower. A control unit manages the temperature of the batteries according to the battery temperature provided by a temperature detector. When the battery temperature becomes equal to or higher than a predetermined cooling required temperature, the control unit executes a cooling mode of operating the blower to cool the batteries. The control unit executes a temperature equalizing mode of operating the blower to equalize the temperature inside the housing by causing the fluid flowing through the circulation path even when the battery temperature is lower than the cooling required temperature and the cooling is unnecessary.Type: GrantFiled: August 2, 2016Date of Patent: January 5, 2021Assignee: DENSO CORPORATIONInventors: Shinya Kato, Takeshi Sada, Yoshimitsu Inoue, Hiroyoshi Yamamoto, Shota Iguchi
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Publication number: 20200227797Abstract: A battery pack includes a housing accommodating a plurality of batteries and a blower. A control unit manages the temperature of the batteries according to the battery temperature provided by a temperature detector. When the battery temperature becomes equal to or higher than a predetermined cooling required temperature, the control unit executes a cooling mode of operating the blower to cool the batteries. The control unit executes a temperature equalizing mode of operating the blower to equalize the temperature inside the housing by causing the fluid flowing through the circulation path even when the battery temperature is lower than the cooling required temperature and the cooling is unnecessary.Type: ApplicationFiled: August 2, 2016Publication date: July 16, 2020Applicant: DENSO CORPORATIONInventors: Shinya KATO, Takeshi SADA, Yoshimitsu INOUE, Hiroyoshi YAMAMOTO, Shota IGUCHI
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Publication number: 20190339332Abstract: A battery pack includes a secondary battery, a state of charge calculator, an integrated current amount calculator, a differential state of charge calculator, a full charge capacity calculator, and a charging-and-discharging control section. The differential state of charge calculator calculates a differential state of charge between a first state of charge at a first detection timing and a second state of charge at a second detection timing. The integrated current amount calculator calculates an integrated amount of a current flowing to the secondary battery in a subject period from the first detection timing to the second detection timing. The full charge capacity calculator calculates a full charge capacity of the secondary battery based on the differential state of charge and the integrated current amount. The charging-and-discharging control section is configured to restrict one of the charging and the discharging of the secondary battery during the subject period.Type: ApplicationFiled: July 15, 2019Publication date: November 7, 2019Applicant: DENSO CORPORATIONInventors: Yuki TACHIBANA, Yamato UTSUNOMIYA, Takeshi SADA
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Patent number: 9356548Abstract: A vibration damping control apparatus for a vehicle is applied to a vehicle that includes: a generator that is driven by an internal combustion engine to generate electric power; a regulator that controls field current passing through an excitation winding of the generator, so that generated voltage of the generator turns to an externally instructed adjusting voltage; and a battery that charges generated voltage of the generator. The vibration damping control apparatus for a vehicle includes an adjusting voltage setting means for setting the adjusting voltage based on a charge supply power request value required for controlling a residual capacity of the battery and a drive torque request value for the generator required for suppressing vibration of the vehicle.Type: GrantFiled: May 10, 2013Date of Patent: May 31, 2016Assignee: DENSO CORPORATIONInventors: Isao Ookawa, Mamoru Sawada, Takeshi Sada, Toshiki Matsumoto, Katsuyuki Mori, Akihiko Yagyu, Yuuichi Minamiguchi
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Publication number: 20150123624Abstract: A vibration damping control apparatus for a vehicle is applied to a vehicle that includes: a generator that is driven by an internal combustion engine to generate electric power; a regulator that controls field current passing through an excitation winding of the generator, so that generated voltage of the generator turns to an externally instructed adjusting voltage; and a battery that charges generated voltage of the generator. The vibration damping control apparatus for a vehicle includes an adjusting voltage setting means for setting the adjusting voltage based on a charge supply power request value required for controlling a residual capacity of the battery and a drive torque request value for the generator required for suppressing vibration of the vehicle.Type: ApplicationFiled: May 10, 2013Publication date: May 7, 2015Inventors: Isao Ookawa, Mamoru Sawada, Takeshi Sada, Toshiki Matsumoto, Katsuyuki Mori, Akihiko Yagyu, Yuuichi Minamiguchi
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Patent number: 8510007Abstract: A vehicle motion control device adjusts vibrations occurring in components of a vehicle so as to control the motion of a vehicle having independent drive assemblies for front wheels and for rear wheels. The vehicle motion control device includes a base request torque calculation unit that calculates first and second base request torques in response to a request made by the driver of a vehicle. A correction torque calculation unit calculates first and second correction torques used to adjust vibrations in a low-frequency band and in a high-frequency band of the vibrations of the components of the vehicle. An internal combustion engine control unit and a motor generator control unit control an internal combustion engine and a motor generator so that the first and second base request torques are corrected with the first and second correction torques.Type: GrantFiled: December 11, 2008Date of Patent: August 13, 2013Assignee: Denso CorporationInventors: Katsuyuki Mori, Mamoru Sawada, Toshiki Matsumoto, Takeshi Sada
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Patent number: 7679328Abstract: A charged state detecting apparatus for a secondary battery is provided, which can suppress deterioration in the accuracy of detecting a charged state, such as an SOC, the deterioration being caused by variation of a polarization state of a battery. The charged state detecting apparatus stabilizes an amount of polarization of the battery, stops power generation upon confirmation of the stabilization of the polarization amount, and sufficiently alters the current of the battery to sample a required number of data pairs of voltage and current of the battery. Using these data pairs, the charged state detecting apparatus detects a charged state, such as the SOC, of the battery.Type: GrantFiled: October 26, 2006Date of Patent: March 16, 2010Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Satoru Mizuno, Atsushi Hashikawa, Shoji Sakai, Kenji Ueda, Katsunori Tanaka, Takeshi Sada, Akira Kato, Masahiro Sou
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Patent number: 7554297Abstract: A voltage control apparatus checks a battery voltage when an automotive generator gradually increases its output to be within a predetermined range after temporarily stopping the generator. Then, the battery voltage is picked up to calculate the charge rate. Further, a first charge rate and a first residual capacity of the battery is memorized when the engine is stopped. Periodically, a pseudo-open circuit voltage is checked when a charge/discharge current fits within a predetermined small range while the engine is not running, and a second charge rate calculated based on the checked pseudo-open circuit voltage. A second residual capacity is calculated using the first charge rate, the first residual capacity and the second charge rate.Type: GrantFiled: July 17, 2007Date of Patent: June 30, 2009Assignee: Denso CorporationInventors: Takeshi Sada, Makoto Taniguchi, Atsushi Ichikawa
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Publication number: 20090157246Abstract: A vehicle motion control device adjusts vibrations occurring in components of a vehicle so as to control the motion of a vehicle having independent drive assemblies for front wheels and for rear wheels. The vehicle motion control device includes a base request torque calculation unit that calculates first and second base request torques in response to a request made by the driver of a vehicle. A correction torque calculation unit calculates first and second correction torques used to adjust vibrations in a low-frequency band and in a high-frequency band of the vibrations of the components of the vehicle. An internal combustion engine control unit and a motor generator control unit control an internal combustion engine and a motor generator so that the first and second base request torques are corrected with the first and second correction torques.Type: ApplicationFiled: December 11, 2008Publication date: June 18, 2009Applicant: DENSO CORPORATIONInventors: Katsuyuki Mori, Mamoru Sawada, Toshiki Matsumoto, Takeshi Sada
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Patent number: 7507497Abstract: A degradation judgment method, for a storage battery, according to the invention detects generation of a gas (hydrogen, oxygen, etc) after the start of charging of a lead-acid storage battery 10 and measures the electrical characteristics (voltage, current, resistance, etc) of the lead-acid storage battery upon generation of the gas and a gas concentration, a gas generation quantity and a gas generation speed. These measurement values are compared with the results of determination of the relation calculated in advance between the degradation condition and these various quantities and the degradation condition of the lead-acid storage battery is judged.Type: GrantFiled: August 31, 2006Date of Patent: March 24, 2009Assignees: DENSO CORPORATION, Nippon Soken, Inc.Inventors: Shuichi Yamashita, Takeshi Sada, Atsushi Hashikawa
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Patent number: 7317300Abstract: A voltage control apparatus checks a battery voltage when an automotive generator gradually increases its output to be within a predetermined range after temporarily stopping the generator. Then, the battery voltage is picked up to calculate the charge rate. Further, a first charge rate and a first residual capacity of the battery is memorized when the engine is stopped. Periodically, a pseudo-open circuit voltage is checked when a charge/discharge current fits within a predetermined small range while the engine is not running, and a second charge rate calculated based on the checked pseudo-open circuit voltage. A second residual capacity is calculated using the first charge rate, the first residual capacity and the second charge rate.Type: GrantFiled: June 17, 2004Date of Patent: January 8, 2008Assignee: Denso CorporationInventors: Takeshi Sada, Makoto Taniguchi, Atsushi Ichikawa
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Publication number: 20070257641Abstract: A voltage control apparatus checks a battery voltage when an automotive generator gradually increases its output to be within a predetermined range after temporarily stopping the generator. Then, the battery voltage is picked up to calculate the charge rate. Further, a first charge rate and a first residual capacity of the battery is memorized when the engine is stopped. Periodically, a pseudo-open circuit voltage is checked when a charge/discharge current fits within a predetermined small range while the engine is not running, and a second charge rate calculated based on the checked pseudo-open circuit voltage. A second residual capacity is calculated using the first charge rate, the first residual capacity and the second charge rate.Type: ApplicationFiled: July 17, 2007Publication date: November 8, 2007Applicant: DENSO CORPORATIONInventors: Takeshi Sada, Makoto Taniguchi, Atsushi Ichikawa
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Publication number: 20070090805Abstract: A charged state detecting apparatus for a secondary battery is provided, which can suppress deterioration in the accuracy of detecting a charged state, such as an SOC, the deterioration being caused by variation of a polarization state of a battery. The charged state detecting apparatus stabilizes an amount of polarization of the battery, stops power generation upon confirmation of the stabilization of the polarization amount, and sufficiently alters the current of the battery to sample a required number of data pairs of voltage and current of the battery. Using these data pairs, the charged state detecting apparatus detects a charged state, such as the SOC, of the battery.Type: ApplicationFiled: October 26, 2006Publication date: April 26, 2007Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Satoru Mizuno, Atsushi Hashikawa, Shoji Sakai, Kenji Ueda, Katsunori Tanaka, Takeshi Sada, Akira Kato, Masahiro Sou
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Publication number: 20070054177Abstract: A degradation judgment method, for a storage battery, according to the invention detects generation of a gas (hydrogen, oxygen, etc) after the start of charging of a lead-acid storage battery 10 and measures the electrical characteristics (voltage, current, resistance, etc) of the lead-acid storage battery upon generation of the gas and a gas concentration, a gas generation quantity and a gas generation speed. These measurement values are compared with the results of determination of the relation calculated in advance between the degradation condition and these various quantities and the degradation condition of the lead-acid storage battery is judged.Type: ApplicationFiled: August 31, 2006Publication date: March 8, 2007Applicant: DENSO CorporationInventors: Shuichi Yamashita, Takeshi Sada, Atsushi Hashikawa
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Publication number: 20040257045Abstract: A voltage control apparatus checks a battery voltage when an automotive generator gradually increases its output to be within a predetermined range after temporarily stopping the generator. Then, the battery voltage is picked up to calculate the charge rate. Further, a first charge rate and a first residual capacity of the battery is memorized when the engine is stopped. Periodically, a pseudo-open circuit voltage is checked when a charge/discharge current fits within a predetermined small range while the engine is not running, and a second charge rate calculated based on the checked pseudo-open circuit voltage. A second residual capacity is calculated using the first charge rate, the first residual capacity and the second charge rate.Type: ApplicationFiled: June 17, 2004Publication date: December 23, 2004Applicant: DENSO CORPORATIONInventors: Takeshi Sada, Makoto Taniguchi, Atsushi Ichikawa
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Patent number: 6426609Abstract: A control voltage is set to an acceleration control voltage which is higher than a battery voltage V by a predetermined voltage difference &Dgr;V1 within a range and delayed by a predetermined time &Dgr;T1 during acceleration at low speeds. During acceleration at low speeds, the rotational speed is less than a predetermined value and the rate of increase in rotational speed is equal to or greater than another predetermined value. The range of voltage is higher than battery voltage V and lower than the steady state control voltage of 14.5V.Type: GrantFiled: December 22, 2000Date of Patent: July 30, 2002Assignee: Denso CorporationInventors: Koji Tanaka, Makoto Taniguchi, Takeshi Sada
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Publication number: 20010043055Abstract: A control voltage is set to an acceleration control voltage which is higher than a battery voltage V by a predetermined voltage difference &Dgr;V1 within a range and delayed by a predetermined time &Dgr;T1 during acceleration at low speeds. During acceleration at low speeds, the rotational speed is less than a predetermined value and the rate of increase in rotational speed is equal to or greater than another predetermined value. The range of voltage is higher than battery voltage V and lower than the steady state control voltage of 14.5V.Type: ApplicationFiled: December 22, 2000Publication date: November 22, 2001Inventors: Koji Tanaka, Makoto Taniguchi, Takeshi Sada
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Patent number: 6133715Abstract: A power source system is composed of a generator, a running-condition sensing-unit, a power control unit which controls generator output voltage according to vehicle running condition, and a constant voltage source connected in series with the generator and a vehicle load. The constant voltage source supplies the vehicle load with power at a constant voltage lower than the output voltage of the generator.Type: GrantFiled: November 27, 1998Date of Patent: October 17, 2000Assignee: Denso CorporationInventors: Takeshi Sada, Toshinori Maruyama
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Patent number: 6060866Abstract: In a power control system for a vehicle battery charging ac generator that has a switching element for turning on or off field current, the switching element is turned on at a first duty cycle less than a sum of a predetermined value and a value inversely proportional to rotation speed of the ac generator if the rotation speed is higher than a predetermined speed and at a second duty cycle more than 100% if the rotation speed is not higher than the predetermined speed.Type: GrantFiled: November 3, 1998Date of Patent: May 9, 2000Assignee: Denso CorporationInventors: Takeshi Sada, Toshinori Maruyama, Tadashi Uematsu