Patents by Inventor Nobuhide Yoshida
Nobuhide Yoshida 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: 10263434Abstract: A charge and discharge device (10) includes: a battery unit (110) in which m (m is an integer of 3 or more) battery cells (112) that are connected in series are grouped into plural groups (114) including n (n is an integer equal to or larger than 2 and smaller than m) battery cells (112) that are continuously arranged and a part of the battery cells (112) that belong to a certain group is shared by a different group; a cell balance unit (120) that is provided for each group (114) and uniformizes voltages of the battery cells (112) that belong to the group (114); and a control unit (130) that stops the operation of the cell balance unit (120), when a voltage difference of the battery cells (112) that belong to an arbitrary one of the groups (114) is within a predetermined value, and when a total average voltage in all the battery cells (112) and a partial average voltage which is an average voltage of the battery cells (112) that belong to the arbitrary group (114) satisfy a specific condition, the cell balancType: GrantFiled: March 27, 2014Date of Patent: April 16, 2019Assignee: NEC CorporationInventors: Junichi Miyamoto, Shingo Takahashi, Yuan Luo, Nobuhide Yoshida
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Patent number: 9954378Abstract: A power storage system comprises the following: a battery unit in which a plurality of battery cells are connected; an acquisition unit for continuously acquiring, while the battery unit is discharging, (V) which represents the extent of the discharge from the battery unit and the temperature (T) of the battery unit when the degree of discharge is (V); a balancing unit for executing cell balancing by which a difference in amount of charging between battery cells is reduced; and a balancing control unit for controlling the balancing unit so that when a reference state is detected based on (V) and (T), cell balancing is not executed, in accordance with a result of the detected reference state.Type: GrantFiled: June 26, 2014Date of Patent: April 24, 2018Assignee: NEC CorporationInventors: Kenji Kobayashi, Yuan Luo, Junichi Miyamoto, Shingo Takahashi, Nobuhide Yoshida
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Patent number: 9735596Abstract: A battery control device includes: a measurement unit that individually measures an amount of discharging current of each discharging secondary battery of discharging secondary batteries among a plurality of secondary batteries which are independently charged and discharged; a time calculating unit that calculates time required for discharging said each discharging secondary battery until said each discharging secondary battery reaches a constant battery capacity based on a discharging current rate for said each discharging secondary battery which is calculated based on the amount of discharging current, and a state of charge (SOC) of said each discharging secondary battery; a number calculating unit that calculates an expected number of charging secondary batteries among said plurality of secondary batteries, which become fully charged in a required time, based on a charging current rate for each charging secondary battery of charging secondary batteries among said plurality of secondary batteries which is cType: GrantFiled: November 1, 2013Date of Patent: August 15, 2017Assignee: NEC CorporationInventors: Yuan Luo, Shinya Ohhata, Junji Kogure, Nobuhide Yoshida, Shingo Takahashi, Noriyuki Itabashi
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Patent number: 9693244Abstract: A sensor system in which it is possible to identify a sufficient number of sensors even in a situation where the data length of a packet is limited, as well as a sensor and a receiving device in the same, are provided. A sensor repeating a measurement period for performing measurement and a transmission period for performing transmission at predetermined cycles, includes: a measurement section (11) that outputs during the measurement period measurement information based on predetermined measurement; and a transmission section (12) that transmits during the transmission period, by using a single packet or a plurality of packets, source identification information for identifying a source of a packet, the measurement information, and sensor-related information for identifying the sensor and/or a measurement target equipment of this sensor.Type: GrantFiled: May 24, 2012Date of Patent: June 27, 2017Assignee: NEC CorporationInventors: Kenichi Maruhashi, Shingo Takahashi, Noriyuki Itabashi, Nobuhide Yoshida
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Patent number: 9669726Abstract: A battery control device (100) includes: a measurement unit (110) that measures a voltage of a secondary battery; a control unit (120) that initiates a charging process of performing charging until the voltage of the secondary battery reaches a second reference value greater than a first reference value in a case where a voltage measured by the measurement unit (110) is less than the first reference value; and an adjustment unit (130) that receives a degree of deterioration of the secondary battery as first adjustment information that becomes a reference for adjustment of a hysteresis width that is determined on the basis of the first reference value and the second reference value, and adjusts the hysteresis width on the basis of the first adjustment information that is received.Type: GrantFiled: November 1, 2013Date of Patent: June 6, 2017Assignee: NEC CorporationInventors: Yuan Luo, Nobuhide Yoshida, Junji Kogure, Shinya Ohhata, Shingo Takahashi, Noriyuki Itabashi
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Patent number: 9599647Abstract: The purpose of the present invention is to provide a processing apparatus, which operates using a power supply that asynchronously supplies and stops supplying power, and a processing method. A processing apparatus (10) of the present invention is provided with: a power supply monitoring unit (20), which monitors power being supplied from a power supply that supplies power for a first period or more, at the time of supplying power of a first power value or more that is necessary for first processing, and which outputs first notification when the supplied power is at the first power value or more; and a processing unit (30), which operates with the power supplied from the power supply, and when the first notification is received, which completes the first processing within the first period by transiting to a first operation state, wherein the first processing can be performed, from a standby state, wherein supply of power of the first power value or more is not needed.Type: GrantFiled: August 18, 2011Date of Patent: March 21, 2017Assignee: NEC CorporationInventors: Shingo Takahashi, Nobuhide Yoshida
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Patent number: 9472976Abstract: Provided is a storage battery device whose battery life can be prolonged further. Storage battery device having a plurality of storage battery cells connected in series includes monitoring unit that measures voltages via the terminals of the respective storage battery cells, and obtains degradation information indicating the degraded states of the plurality of storage battery cells based on the voltages, selection unit that selects at least one of the plurality of storage battery cells, power supply unit that supplies power to the storage battery cell selected by selection unit to charge the storage battery cell, and control unit that switches, based on the degradation information obtained by monitoring unit, a storage battery cell to be selected by selection unit, and adjusts the power supplied from power supply unit.Type: GrantFiled: November 13, 2012Date of Patent: October 18, 2016Assignee: NEC CORPORATIONInventors: Yuan Luo, Kenichi Maruhashi, Nobuhide Yoshida, Shingo Takahashi, Noriyuki Itabashi
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Publication number: 20160211677Abstract: A power storage system (10) comprises the following: a battery unit (11) in which a plurality of battery cells are connected; an acquisition unit (12) for continuously acquiring, while the battery unit (11) is discharging, (V) which represents the extent of the discharge from the battery unit (11) and the temperature (T) of the battery unit (11) when the degree of discharge is (V); a balancing unit (13) for executing cell balancing by which the difference in the amount of charging between battery cells is reduced; and a balancing control unit (14) for controlling the balancing unit (13) so that when a reference state is detected on the basis of (V) and (T), cell balancing is not executed, in accordance with the results of the detection.Type: ApplicationFiled: June 26, 2014Publication date: July 21, 2016Inventors: Kenji KOBAYASHI, Yuan LUO, Junichi MIYAMOTO, Shingo TAKAHASHI, Nobuhide YOSHIDA
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Publication number: 20150318726Abstract: A battery control device (100) includes: a measurement unit (110) that individually measures an amount of discharging current of a discharging secondary battery among a plurality of secondary batteries which are independently charged and discharged; a time calculating unit (120) that calculates time required until the secondary battery has a constant battery capacity for each of the discharging secondary batteries on the basis of a discharging current rate for each of the secondary batteries which is calculated on the basis of the amount of discharging current, and an SOC of the secondary battery; a number calculating unit (130) that calculates an expected number of the secondary batteries, which become fully charged in the required time, on the basis of a charging current rate for each of the secondary batteries which is calculated on the basis of an amount of charging current of the charging secondary battery, an SOC of the secondary battery, and the required time, and calculates a total value of the expectType: ApplicationFiled: November 1, 2013Publication date: November 5, 2015Applicant: NEC CorporationInventors: Yuan LUO, Shinya OHHATA, Junji KOGURE, Nobuhide YOSHIDA, Shingo TAKAHASHI, Noriyuki ITABASHI
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Publication number: 20150291050Abstract: A battery control device (100) includes: a measurement unit (110) that measures a voltage of a secondary battery; a control unit (120) that initiates a charging process of performing charging until the voltage of the secondary battery reaches a second reference value greater than a first reference value in a case where a voltage measured by the measurement unit (110) is less than the first reference value; and an adjustment unit (130) that receives a degree of deterioration of the secondary battery as first adjustment information that becomes a reference for adjustment of a hysteresis width that is determined on the basis of the first reference value and the second reference value, and adjusts the hysteresis width on the basis of the first adjustment information that is received.Type: ApplicationFiled: November 1, 2013Publication date: October 15, 2015Applicant: NEC CorporationInventors: Yuan Luo, Nobuhide Yoshida, Junji Kogure, Shinya Ohhata, Shingo Takahashi, Noriyuki Itabashi
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Publication number: 20150229142Abstract: Secondary battery cells (100) are connected in series. A measurement unit (120) measures the sum of the voltages of the plurality of secondary battery cells (100). A balance circuit (140) equalizes the voltages of the plurality of secondary battery cells (100). A control unit (160) controls the balance circuit (140). Specifically, the control unit (160) operates the balance circuit (140) when the charging rate of the plurality of secondary battery cells (100) is equal to or less than 50% or the sum of the voltages of the plurality of secondary battery cells (100) is equal to or less than a first reference value and an absolute value of a differential value of a graph indicating the sum of the voltages when the charging rate is a variable is equal to or less than a second reference value.Type: ApplicationFiled: July 19, 2013Publication date: August 13, 2015Inventors: Shingo Takahashi, Koji Matsunaga, Nobuhide Yoshida, Noriyuki Itabashi, Yuan Luo
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Publication number: 20150130404Abstract: Provided is a storage battery device whose battery life can be prolonged further. Storage battery device 30 having a plurality of storage battery cells 31-1 to 31-n connected in series includes monitoring unit 33 that measures voltages via the terminals of the respective storage battery cells, and obtains degradation information indicating the degraded states of the plurality of storage battery cells based on the voltages, selection unit 34 that selects at least one of the plurality of storage battery cells, power supply unit 32 that supplies power to the storage battery cell selected by selection unit 34 to charge the storage battery cell, and control unit 35 that switches, based on the degradation information obtained by monitoring unit 33, a storage battery cell to be selected by selection unit 34, and adjusts the power supplied from power supply unit 32.Type: ApplicationFiled: November 13, 2012Publication date: May 14, 2015Applicant: NEC CORPORATIONInventors: Yuan Luo, Kenichi Maruhashi, Nobuhide Yoshida, Shingo Takahashi, Noriyuki Itabashi
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Publication number: 20140098700Abstract: A sensor system in which it is possible to identify a sufficient number of sensors even in a situation where the data length of a packet is limited, as well as a sensor and a receiving device in the same, are provided. A sensor repeating a measurement period for performing measurement and a transmission period for performing transmission at predetermined cycles, includes: a measurement section (11) that outputs during the measurement period measurement information based on predetermined measurement; and a transmission section (12) that transmits during the transmission period, by using a single packet or a plurality of packets, source identification information for identifying a source of a packet, the measurement information, and sensor-related information for identifying the sensor and/or a measurement target equipment of this sensor.Type: ApplicationFiled: May 24, 2012Publication date: April 10, 2014Applicant: NEC CorporationInventors: Kenichi Maruhashi, Shingo Takahashi, Noriyuki Itabashi, Nobuhide Yoshida
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Patent number: 8599051Abstract: A time-interleaved A/D converter apparatus has a primary signal A/D converter circuit group that is time-interleaved with a combination of N A/D converter circuits, a correction signal generation part operable to receive the input analog signal and a 1/m-sampling signal having a speed that is 1/m of a rate of the sampling signal inputted to the primary signal A/D converter circuit group, to extract a dispersion of a transmission line that is immanent in the input analog signal, and to output the dispersion as a dispersion compensation control signal used for digital signal compensation, and a signal processing part operable to convert the N digital signals into one digital signal based upon the dispersion compensation control signal and to compensate a dispersion included in the converted digital signal.Type: GrantFiled: March 1, 2011Date of Patent: December 3, 2013Assignee: NEC CorporationInventors: Nobuhide Yoshida, Hidemi Noguchi
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Publication number: 20130271080Abstract: [Problem] A charging system and a charging method which make a plurality of power supply circuits for generating electric power of a predetermined power value operate with high conversion efficiency to charge a secondary battery efficiently are provided. [Solution] The charging system includes an output means which supplies electric power, a plurality of electric power generating means which generate electric power of a predetermined power value, a detection means which detects a state of the output means and a control means which controls the plurality of electric power generating means based on the state that the output means has detected.Type: ApplicationFiled: December 16, 2011Publication date: October 17, 2013Applicant: NEC CORPORATIONInventor: Nobuhide Yoshida
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Patent number: 8509238Abstract: A communication network of the present invention includes: a plurality of superordinate nodes 110 to 1m0 forming a cascade type topology; and a plurality of terminal nodes 111 to 11n, connected to at least one superordinate node from among said plurality of superordinate nodes and forming a star type topology with the superordinate node connected.Type: GrantFiled: November 16, 2007Date of Patent: August 13, 2013Assignees: NEC Corporation, NEC Engineering, Ltd.Inventors: Yuuichi Aoki, Tohru Kimura, Hitoshi Yano, Nobuhide Yoshida, Daigo Taguchi, Akitake Mitsuhashi, Jun Noda, Teruki Sukenari, Kunihiro Suzuki, Koji Fukami
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Patent number: 8488961Abstract: A dispersion determining apparatus comprises a received waveform monitoring part (1) and a dispersion amount determining part (4). The received waveform monitoring part (1) has a waveform monitoring circuit (2) that samples data from the received waveform of a received signal having propagated along a transmission path, and a histogram extracting circuit (3) that extracts, based on the sampled data obtained by the waveform monitoring circuit (2), a histogram data representative of the intensity distribution in the voltage direction of the received waveform. The dispersion amount determining part (4) has a polarized wave dispersion estimating circuit (7) that determines the horizontally asymmetric degree of a received eye-pattern waveform of the received waveform obtained by analyzing the histogram data extracted by the received waveform monitoring part (1) and then estimates, based on the determined asymmetric degree, a polarized wave dispersion amount in the transmission path.Type: GrantFiled: August 15, 2007Date of Patent: July 16, 2013Assignee: NEC CorporationInventor: Nobuhide Yoshida
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Publication number: 20130179102Abstract: The purpose of the present invention is to provide a processing apparatus, which operates using a power supply that asynchronously supplies and stops supplying power, and a processing method. A processing apparatus (10) of the present invention is provided with: a power supply monitoring unit (20), which monitors power being supplied from a power supply that supplies power for a first period or more, at the time of supplying power of a first power value or more that is necessary for first processing, and which outputs first notification when the supplied power is at the first power value or more; and a processing unit (30), which operates with the power supplied from the power supply, and when the first notification is received, which completes the first processing within the first period by transiting to a first operation state, wherein the first processing can be performed, from a standby state, wherein supply of power of the first power value or more is not needed.Type: ApplicationFiled: August 18, 2011Publication date: July 11, 2013Applicant: NEC CORPORATIONInventors: Shingo Takahashi, Nobuhide Yoshida
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Publication number: 20130027234Abstract: A time-interleaved A/D converter apparatus has a primary signal A/D converter circuit group that is time-interleaved with a combination of N A/D converter circuits, a correction signal generation part operable to receive the input analog signal and a 1/m-sampling signal having a speed that is 1/m of a rate of the sampling signal inputted to the primary signal A/D converter circuit group, to extract a dispersion of a transmission line that is immanent in the input analog signal, and to output the dispersion as a dispersion compensation control signal used for digital signal compensation, and a signal processing part operable to convert the N digital signals into one digital signal based upon the dispersion compensation control signal and to compensate a dispersion included in the converted digital signal.Type: ApplicationFiled: March 1, 2011Publication date: January 31, 2013Applicant: NEC CORPORATIONInventors: Nobuhide Yoshida, Hidemi Noguchi
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Publication number: 20100085969Abstract: A communication network of the present invention includes: a plurality of superordinate nodes 110 to 1m0 forming a cascade type topology; and a plurality of terminal nodes 111 to 11n, connected to at least one superordinate node from among said plurality of superordinate nodes and forming a star type topology with the superordinate node connected.Type: ApplicationFiled: November 16, 2007Publication date: April 8, 2010Inventors: Yuuichi Aoki, Tohru Kimura, Hitoshi Yano, Nobuhide Yoshida, Daigo Taguchi, Akitake Mitsuhashi, Jun Noda, Teruki Sukenari, Kunihiro Suzuki, Koji Fukami