Patents by Inventor Yohsuke Mitani
Yohsuke Mitani 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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Publication number: 20190139712Abstract: An electricity storage unit of the present disclosure includes: an electricity storage device; a holder for holding this electricity storage device; a case having a tubular side wall part and a bottom surface part closing one end of the side wall part, the case being formed with an opening at another end of the side wall part; and a cover for covering the opening. The electricity storage device and the holder are housed inside the case. At least a part of the cover is inserted inside the case. An aperture is formed at least part of a region between an outer periphery of the cover and an inner surface of the side wall part.Type: ApplicationFiled: December 18, 2018Publication date: May 9, 2019Inventors: Kiyoshi WAKINAKA, Yohsuke MITANI, Kazuki MORITA
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Patent number: 10192691Abstract: An electricity storage unit of the present disclosure includes: electricity storage device; holder for holding this electricity storage device; bottomed tubular case for housing electricity storage device and holder; and cover for covering opening of case. At least a part of cover is inserted into case. With this configuration, since a surface on which a joint between cover and case is formed can be disposed on an opening side of case, it is possible to suppress intrusion of a foreign substance, such as a water droplet.Type: GrantFiled: June 14, 2017Date of Patent: January 29, 2019Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Kiyoshi Wakinaka, Yohsuke Mitani, Kazuki Morita
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Publication number: 20180366973Abstract: A discharge circuit includes: a first transistor connected to power storage; an operational amplifier for controlling an output current of the first transistor; and the current mirror circuit connected to the operational amplifier. The current mirror circuit includes a second transistor connected to a non-inverting input terminal of the operational amplifier, and a third transistor connected to the power storage.Type: ApplicationFiled: August 28, 2018Publication date: December 20, 2018Inventors: TAKAHIRO KUDO, YOSHIMITSU ODAJIMA, YOHSUKE MITANI
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Patent number: 10029572Abstract: A hybrid power source connects a secondary battery and an EDLC. A first switch connects the hybrid power source and a lead acid battery in parallel. A power source controlling portion controls power supply to the hybrid power source and the lead acid battery. The hybrid power source is connected to a starter for starting an engine for a vehicle, and also connected to an electric device except for the starter through the first switch, and the lead acid battery is connected to the electric device, and also connected to the starter through the first switch.Type: GrantFiled: October 20, 2015Date of Patent: July 24, 2018Assignees: SANYO ELECTRIC CO., LTD., PANASONIC CORPORATIONInventors: Toshihiro Sakatani, Hiromasa Sugii, Makoto Ochi, Kazuki Morita, Takumi Yamaguchi, Yohsuke Mitani
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Publication number: 20170278645Abstract: An electricity storage unit of the present disclosure includes: electricity storage device; holder for holding this electricity storage device; bottomed tubular case for housing electricity storage device and holder; and cover for covering opening of case. At least a part of cover is inserted into case. With this configuration, since a surface on which a joint between cover and case is formed can be disposed on an opening side of case, it is possible to suppress intrusion of a foreign substance, such as a water droplet.Type: ApplicationFiled: June 14, 2017Publication date: September 28, 2017Inventors: KIYOSHI WAKINAKA, YOHSUKE MITANI, KAZUKI MORITA
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Publication number: 20170106758Abstract: A hybrid power source connects a secondary battery and an EDLC. A first switch connects the hybrid power source and a lead acid battery in parallel. A power source controlling portion controls power supply to the hybrid power source and the lead acid battery. The hybrid power source is connected to a starter for starting an engine for a vehicle, and also connected to an electric device except for the starter through the first switch, and the lead acid battery is connected to the electric device, and also connected to the starter through the first switch.Type: ApplicationFiled: October 20, 2015Publication date: April 20, 2017Inventors: Toshihiro SAKATANI, Hiromasa SUGII, Makoto OCHI, Kazuki MORITA, Takumi YAMAGUCHI, Yohsuke MITANI
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Patent number: 8305035Abstract: In an energy storage device, a charging circuit is electrically coupled to the energy storage section. A first comparator is electrically coupled to an energy storage section, and its output is inverted when voltage Vc of the energy storage section reaches first predetermined voltage Vc1. A second comparator is electrically coupled to the energy storage section, and its output is inverted when voltage Vc of the energy storage section reaches second predetermined voltage Vc2. A control circuit is electrically coupled to the first comparator and the second comparator. The control circuit obtains period tm from inversion of the output of the first comparator to the output of the second comparator. Capacitance C of the energy storage section is calculated based on this period tm and voltage change width ?Vc between the first predetermined voltage Vc1 and the second predetermined voltage Vc2.Type: GrantFiled: August 23, 2010Date of Patent: November 6, 2012Assignee: Panasonic CorporationInventors: Kazuki Morita, Yohsuke Mitani
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Publication number: 20110115427Abstract: In an energy storage device, a charging circuit is electrically coupled to the energy storage section. A first comparator is electrically coupled to an energy storage section, and its output is inverted when voltage Vc of the energy storage section reaches first predetermined voltage Vc1. A second comparator is electrically coupled to the energy storage section, and its output is inverted when voltage Vc of the energy storage section reaches second predetermined voltage Vc2. A control circuit is electrically coupled to the first comparator and the second comparator. The control circuit obtains period tm from inversion of the output of the first comparator to the output of the second comparator. Capacitance C of the energy storage section is calculated based on this period tm and voltage change width ?Vc between the first predetermined voltage Vc1 and the second predetermined voltage Vc2.Type: ApplicationFiled: August 23, 2010Publication date: May 19, 2011Applicant: Panasonic CorporationInventors: Kazuki Morita, Yohsuke Mitani
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Patent number: 7872447Abstract: In an electrical storage apparatus including an electric storage device connected between a main power supply and a load, a first bypass FET and a bypass diode which are connected in series between the main power supply and the load are provided, and first and second main path FETs connected in series between the electric storage device and the load are provided. A controller judges that the first bypass FET suffers an open-circuit failure if the voltage (Va) of the load is equal to or smaller than the first threshold value Vth1 or if the voltage (Vc) at the connection point between the first bypass FET and the bypass diode is equal to or smaller than the second threshold value Vth2, when the first bypass FET is turned on and the first main path FET and the second main path FET are turned off.Type: GrantFiled: December 21, 2007Date of Patent: January 18, 2011Assignee: Panasonic CorporationInventors: Kazuki Morita, Hideaki Hamai, Yohsuke Mitani
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Patent number: 7742885Abstract: A vehicle power supply device has a capacitor unit including capacitors storing auxiliary power; a temperature sensor; a charge circuit; a capacitor-unit current detector; a capacitor-unit voltage detector; a controller; a storage; and a determination unit. The determination unit determines the degradation level of the capacitor unit based on at least one of an internal resistance standard value and a corrected calculated value of capacitance. This structure determines degradation of the vehicle power supply device more accurately than ever, so that the device can be used until the end of the actual life.Type: GrantFiled: July 21, 2006Date of Patent: June 22, 2010Assignee: Panasonic CorporationInventors: Tosihiko Oohasi, Yohsuke Mitani, Junji Takemoto, Kazuki Morita, Yoshimitu Odajima
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Patent number: 7680612Abstract: A vehicle power supply device performs highly accurate determination of degradation of the capacitor unit as follows. Internal resistance and capacitance are corrected according to the temperature of capacitor unit during charge or discharge, thereby obtaining a corrected calculated value if capacitance. The corrected calculated value of capacitance is substituted into a degradation determination formula, which is pre-calculated according to the temperature, thereby calculating the standard value corresponding to the temperature detected by temperature sensor. When the standard value is equal to or less than the corrected calculated value of internal resistance, capacitor unit is determined to be degraded.Type: GrantFiled: July 26, 2006Date of Patent: March 16, 2010Assignee: Panasonic CorporationInventors: Tosihiko Oohasi, Yohsuke Mitani
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Publication number: 20090228221Abstract: A detector for detecting a state of an electrical storage device includes capacitor blocks formed of a capacitor-voltage equalizing circuit and a capacitor-voltage detecting circuit both coupled to respective capacitors, and a capacitor-block state outputting circuit outputting states of the capacitors by using the signals supplied from the capacitor-voltage detecting circuits. The signals from the capacitor-voltage detecting circuits are transmitted via an optical switch, which works as an electrical indirect coupler, to the capacitor-block state outputting circuit. This structure allows isolating high-voltage oriented wirings completely from signal oriented wirings, so that high reliability can be ensured.Type: ApplicationFiled: September 5, 2006Publication date: September 10, 2009Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Kimiyasu Kakiuchi, Yohsuke Mitani
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Publication number: 20090167575Abstract: The A/D conversion apparatus and the vehicle power-supply device using the apparatus calculate errors at a plurality of reference voltages and reference errors prior to error correction. Each reference error is applied to a digital-output range that is divided by digital output corresponding to the reference voltages. In the calculation, when the errors obtained at adjacent reference voltages have same signs, the reference error is determined as an average of the errors obtained at adjacent reference voltages; on the other hand, when the errors obtained at adjacent reference voltages have different signs, the reference error is determined to be zero. The apparatus provides a corrected digital output by subtracting the reference error—which is applied to the digital-output range including the digital output—from the digital output corresponding to analog input voltage.Type: ApplicationFiled: December 19, 2006Publication date: July 2, 2009Applicant: PANASONIC CORPORATIONInventors: Yohsuke Mitani, Kazuki Morita, Yoshimitu Odajima
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Patent number: 7531987Abstract: Capacitor unit and capacitor control system used in high output power source are reduced in size. A capacitor unit controlled by the capacitor control system is divided into capacitor blocks formed of a specified number of capacitors connected in series, and each capacitor block is provided with a detector. Plural detectors are connected to a microcomputer by way of an analog switch.Type: GrantFiled: April 6, 2005Date of Patent: May 12, 2009Assignee: Panasonic CorporationInventors: Tosihiko Ohasi, Kimiyasu Kakiuchi, Yohsuke Mitani
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Publication number: 20090119034Abstract: A vehicle power supply device performs highly accurate determination of degradation of the capacitor unit as follows. Internal resistance and capacitance are corrected according to the temperature of capacitor unit during charge or discharge, thereby obtaining a corrected calculated value if capacitance. The corrected calculated value of capacitance is substituted into a degradation determination formula, which is pre-calculated according to the temperature, thereby calculating the standard value corresponding to the temperature detected by temperature sensor. When the standard value is equal to or less than the corrected calculated value of internal resistance, capacitor unit is determined to be degraded.Type: ApplicationFiled: July 26, 2006Publication date: May 7, 2009Inventors: Tosihiko Oohasi, Yohsuke Mitani
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Publication number: 20090088993Abstract: A vehicle power supply device has a capacitor unit including capacitors storing auxiliary power; a temperature sensor; a charge circuit; a capacitor-unit current detector; a capacitor-unit voltage detector; a controller; a storage; and a determination unit. The determination unit determines the degradation level of the capacitor unit based on at least one of an internal resistance standard value and a corrected calculated value of capacitance. This structure determines degradation of the vehicle power supply device more accurately than ever, so that the device can be used until the end of the actual life.Type: ApplicationFiled: July 21, 2006Publication date: April 2, 2009Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Tosihiko Oohasi, Yohsuke Mitani, Junji Takemoto, Kazuki Morita, Yoshimitu Odajima
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Publication number: 20080218176Abstract: A power supply device has a capacitor unit in which capacitors are interconnected in series, a charging unit for charging the capacitor unit at a constant current, a detecting unit for detecting voltage on the high potential side of each of the capacitors, a determining unit for determining the existence of an abnormality based on the voltage detected by the detecting unit. The determining unit determines the abnormality when the difference between respective voltages on the high potential sides of some adjacent capacitors exceeds upper-limit voltage value Va, when the difference is lower than lower-limit voltage value Vb, or when a voltage is negative.Type: ApplicationFiled: December 13, 2005Publication date: September 11, 2008Inventors: Toshihiko Ohashi, Yohsuke Mitani, Kazuki Morita, Yoshimitu Odajima, Junji Takemoto
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Publication number: 20080150483Abstract: In an electrical storage apparatus including an electric storage device connected between a main power supply and a load, a first bypass FET and a bypass diode which are connected in series between the main power supply and the load are provided, and first and second main path FETs connected in series between the electric storage device and the load are provided. A controller judges that the first bypass FET suffers an open-circuit failure if the voltage (Va) of the load is equal to or smaller than the first threshold value Vth1 or if the voltage (Vc) at the connection point between the first bypass FET and the bypass diode is equal to or smaller than the second threshold value Vth2, when the first bypass FET is turned on and the first main path FET and the second main path FET are turned off.Type: ApplicationFiled: December 21, 2007Publication date: June 26, 2008Inventors: Kazuki MORITA, Hideaki Hamai, Yohsuke Mitani
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Patent number: 7346444Abstract: A capacitor unit used as an auxiliary power source is structured by a plurality of series connected capacitors that have an initial dispersion of characteristics controlled within a predetermined value. During charging, the capacitor unit is monitored if a voltage of the entire capacitor unit is not exceeding a predetermined value. This prevents each capacitor from being charged at a voltage exceeding a withstand voltage.Type: GrantFiled: November 9, 2004Date of Patent: March 18, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Yohsuke Mitani
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Publication number: 20070210761Abstract: Capacitor unit and capacitor control system used in high output power source are reduced in size. A capacitor unit (1) controlled by the capacitor control system is divided into capacitor blocks (3) formed of a specified number of capacitors (2) connected in series, and each capacitor block (3) is provided with a detector (4). Plural detectors (4) are connected to a microcomputer (6) by way of an analog switch (5).Type: ApplicationFiled: April 6, 2005Publication date: September 13, 2007Inventors: Tosihiko Ohasi, Kimiyasu Kakiuchi, Yohsuke Mitani