Patents by Inventor Junji Takemoto
Junji Takemoto 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: 7855533Abstract: A charging apparatus suppresses rise in temperature of an internal chip of a charging element. The output signal obtained from a current detecting portion for detecting charging current to a capacitor and from a voltage detecting portion for detecting a difference between a voltage (VC) of capacitor and a voltage corresponding to DC power supply is integrated by integrator. The charging is carried out by controlling power of a charging element to a predetermined value using an output signal of the integrator and at a time near the completion of the charging, the charging element is controlled by constant-voltage-control-circuit so as to charge the capacitor up to a predetermined voltage. Consequently, the maximum temperature inside the charging element is reduced, thereby providing a charging apparatus with high reliability.Type: GrantFiled: June 2, 2006Date of Patent: December 21, 2010Assignee: Panasonic CorporationInventors: Yoshimitu Odajima, Junji Takemoto, Kazuki Morita
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Patent number: 7777456Abstract: Electric storage device is provided which is capable of smoothly charging storage elements and reliably detecting an overvoltage of each of the storage elements. Electric storage device includes charging/discharging limiting circuit. Charging/discharging limiting circuit includes charge element, discharge, control unit, charging current detection unit, voltage detection unit, valuable reference voltage source, and voltage comparison unit. A magnitude of valuable reference voltage source that is connected to an input terminal on a first side of voltage comparison unit is adjusted by charging current detection unit. Detection signal from the voltage detection unit is given to an input terminal on a second side of voltage comparison unit.Type: GrantFiled: May 15, 2006Date of Patent: August 17, 2010Assignee: Panasonic CorporationInventors: Kazuki Morita, Yoshimitu Odajima, Junji Takemoto
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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: 7547233Abstract: A capacitor unit is provided, which has a long lifetime and is free from maintenance when it is used as an emergency power supply of electronic control braking system, etc. and in which weight load is not applied to a circuit board, high reliability in use under harsh vibration conditions is achieved, and short-circuit defect does not occur even when an explosion-proof valve operates. The capacitor unit of the present invention includes a plurality of capacitors, a circuit board on which a circuit pattern for connecting the capacitors is formed, and a holder sandwiching and retaining the body parts of the capacitors.Type: GrantFiled: September 16, 2004Date of Patent: June 16, 2009Assignee: Panasonic CorporationInventors: Tatehiko Inoue, Junji Takemoto, Shusaku Kawasaki
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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: 20090072791Abstract: Electric storage device is provided which is capable of smoothly charging storage elements and reliably detecting an overvoltage of each of the storage elements. Electric storage device includes charging/discharging limiting circuit. Charging/discharging limiting circuit includes charge element, discharge element, control unit, charging current detection unit, voltage detection unit, valuable reference voltage source, and voltage comparison unit. A magnitude of valuable reference voltage source that is connected to an input terminal on a first side of voltage comparison unit is adjusted by charging current detection unit. Detection signal from the voltage detection unit is given to an input terminal on a second side of voltage comparison unit.Type: ApplicationFiled: May 15, 2006Publication date: March 19, 2009Inventors: Kazuki Morita, Yoshimitu Odajima, Junji Takemoto
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Patent number: 7482816Abstract: In a voltage monitor that measures voltages applied to the terminals of each of a plurality of capacitors constituting a storage section, the each voltage applied to a connecting point between terminals of the capacitors in charging operation, is divided by resistors and the divided voltage is fed into a selector switch. The resistance values used for dividing the each voltage are determined in advance so that a short-circuit between adjacent input terminals of the selector switch allows the divided voltage to have a voltage shift remarkably larger or smaller than the divided voltage obtained under the normal charging operation.Type: GrantFiled: August 23, 2006Date of Patent: January 27, 2009Assignee: Panasonic CorporationInventors: Yoshimitu Odajima, Kazuki Morita, Junji Takemoto
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Publication number: 20090009145Abstract: A charging apparatus suppresses rise in temperature of an internal chip of a charging element. The output signal obtained from a current detecting portion for detecting charging current to a capacitor and from a voltage detecting portion for detecting a difference between a voltage (VC) of capacitor and a voltage corresponding to DC power supply is integrated by integrator. The charging is carried out by controlling power of a charging element to a predetermined value using an output signal of the integrator and at a time near the completion of the charging, the charging element is controlled by constant-voltage-control-circuit so as to charge the capacitor up to a predetermined voltage. Consequently, the maximum temperature inside the charging element is reduced, thereby providing a charging apparatus with high reliability.Type: ApplicationFiled: June 2, 2006Publication date: January 8, 2009Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshimitu Odajima, Junji Takemoto, Kazuki Morita
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Patent number: 7427851Abstract: A capacitor unit using a plurality of capacitors and which has a long lifetime and is maintenance-free is provided. The capacitor unit has a high reliability even in harsh using conditions of vibration and shock and a high noise resistant property. This capacitor unit includes a capacitor block in which a plurality of capacitors are incorporated into a holder with body portions of the capacitors sandwiched; a control circuit portion including a charging and discharging circuit for charging or discharging this capacitor block; a relay connector for electrically connecting thereof, and a case housing thereof.Type: GrantFiled: September 15, 2004Date of Patent: September 23, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Junji Takemoto, Shusaku Kawasaki, Tatehiko Inoue
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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: 20080001593Abstract: In a voltage monitor that measures voltages applied to the terminals of each of a plurality of capacitors constituting a storage section, the each voltage applied to a connecting point between terminals of the capacitors in charging operation, is divided by resistors and the divided voltage is fed into a selector switch. The resistance values used for dividing the each voltage are determined in advance so that a short-circuit between adjacent input terminals of the selector switch allows the divided voltage to have a voltage shift remarkably larger or smaller than the divided voltage obtained under the normal charging operation.Type: ApplicationFiled: August 23, 2006Publication date: January 3, 2008Inventors: Yoshimitu Odajima, Kazuki Morita, Junji Takemoto
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Publication number: 20060061937Abstract: A capacitor unit using a plurality of capacitors and which has a long lifetime and is maintenance-free is provided. The capacitor unit has a high reliability even in harsh using conditions of vibration and shock and a high noise resistant property. This capacitor unit includes a capacitor block in which a plurality of capacitors are incorporated into a holder with body portions of the capacitors sandwiched; a control circuit portion including a charging and discharging circuit for charging or discharging this capacitor block; a relay connector for electrically connecting thereof, and a case housing thereof.Type: ApplicationFiled: September 15, 2004Publication date: March 23, 2006Inventors: Junji Takemoto, Shusaku Kawasaki, Tatehiko Inoue
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Publication number: 20060050468Abstract: A capacitor unit is provided, which has a long lifetime and is free from maintenance when it is used as an emergency power supply of electronic control braking system, etc. and in which weight load is not applied to a circuit board, high reliability in use under harsh vibration conditions is achieved, and short-circuit defect does not occur even when an explosion-proof valve operates. The capacitor unit of the present invention includes a plurality of capacitors, a circuit board on which a circuit pattern for connecting the capacitors is formed, and a holder sandwiching and retaining the body parts of the capacitors.Type: ApplicationFiled: September 16, 2004Publication date: March 9, 2006Inventors: Tatehiko Inoue, Junji Takemoto, Shusaku Kawasaki