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).

  • Patent number: 10263434
    Abstract: 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 balanc
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: April 16, 2019
    Assignee: NEC Corporation
    Inventors: Junichi Miyamoto, Shingo Takahashi, Yuan Luo, Nobuhide Yoshida
  • Patent number: 9954378
    Abstract: 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: Grant
    Filed: June 26, 2014
    Date of Patent: April 24, 2018
    Assignee: NEC Corporation
    Inventors: Kenji Kobayashi, Yuan Luo, Junichi Miyamoto, Shingo Takahashi, Nobuhide Yoshida
  • Patent number: 9735596
    Abstract: 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 c
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: August 15, 2017
    Assignee: NEC Corporation
    Inventors: Yuan Luo, Shinya Ohhata, Junji Kogure, Nobuhide Yoshida, Shingo Takahashi, Noriyuki Itabashi
  • Patent number: 9693244
    Abstract: 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: Grant
    Filed: May 24, 2012
    Date of Patent: June 27, 2017
    Assignee: NEC Corporation
    Inventors: Kenichi Maruhashi, Shingo Takahashi, Noriyuki Itabashi, Nobuhide Yoshida
  • Patent number: 9669726
    Abstract: 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: Grant
    Filed: November 1, 2013
    Date of Patent: June 6, 2017
    Assignee: NEC Corporation
    Inventors: Yuan Luo, Nobuhide Yoshida, Junji Kogure, Shinya Ohhata, Shingo Takahashi, Noriyuki Itabashi
  • Patent number: 9599647
    Abstract: 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: Grant
    Filed: August 18, 2011
    Date of Patent: March 21, 2017
    Assignee: NEC Corporation
    Inventors: Shingo Takahashi, Nobuhide Yoshida
  • Patent number: 9472976
    Abstract: 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: Grant
    Filed: November 13, 2012
    Date of Patent: October 18, 2016
    Assignee: NEC CORPORATION
    Inventors: Yuan Luo, Kenichi Maruhashi, Nobuhide Yoshida, Shingo Takahashi, Noriyuki Itabashi
  • Publication number: 20160211677
    Abstract: 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: Application
    Filed: June 26, 2014
    Publication date: July 21, 2016
    Inventors: Kenji KOBAYASHI, Yuan LUO, Junichi MIYAMOTO, Shingo TAKAHASHI, Nobuhide YOSHIDA
  • Publication number: 20150318726
    Abstract: 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 expect
    Type: Application
    Filed: November 1, 2013
    Publication date: November 5, 2015
    Applicant: NEC Corporation
    Inventors: Yuan LUO, Shinya OHHATA, Junji KOGURE, Nobuhide YOSHIDA, Shingo TAKAHASHI, Noriyuki ITABASHI
  • Publication number: 20150291050
    Abstract: 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: Application
    Filed: November 1, 2013
    Publication date: October 15, 2015
    Applicant: NEC Corporation
    Inventors: Yuan Luo, Nobuhide Yoshida, Junji Kogure, Shinya Ohhata, Shingo Takahashi, Noriyuki Itabashi
  • Publication number: 20150229142
    Abstract: 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: Application
    Filed: July 19, 2013
    Publication date: August 13, 2015
    Inventors: Shingo Takahashi, Koji Matsunaga, Nobuhide Yoshida, Noriyuki Itabashi, Yuan Luo
  • Publication number: 20150130404
    Abstract: 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: Application
    Filed: November 13, 2012
    Publication date: May 14, 2015
    Applicant: NEC CORPORATION
    Inventors: Yuan Luo, Kenichi Maruhashi, Nobuhide Yoshida, Shingo Takahashi, Noriyuki Itabashi
  • Publication number: 20140098700
    Abstract: 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: Application
    Filed: May 24, 2012
    Publication date: April 10, 2014
    Applicant: NEC Corporation
    Inventors: Kenichi Maruhashi, Shingo Takahashi, Noriyuki Itabashi, Nobuhide Yoshida
  • Patent number: 8599051
    Abstract: 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: Grant
    Filed: March 1, 2011
    Date of Patent: December 3, 2013
    Assignee: NEC Corporation
    Inventors: Nobuhide Yoshida, Hidemi Noguchi
  • Publication number: 20130271080
    Abstract: [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: Application
    Filed: December 16, 2011
    Publication date: October 17, 2013
    Applicant: NEC CORPORATION
    Inventor: Nobuhide Yoshida
  • Patent number: 8509238
    Abstract: 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: Grant
    Filed: November 16, 2007
    Date of Patent: August 13, 2013
    Assignees: 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
  • Patent number: 8488961
    Abstract: 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: Grant
    Filed: August 15, 2007
    Date of Patent: July 16, 2013
    Assignee: NEC Corporation
    Inventor: Nobuhide Yoshida
  • Publication number: 20130179102
    Abstract: 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: Application
    Filed: August 18, 2011
    Publication date: July 11, 2013
    Applicant: NEC CORPORATION
    Inventors: Shingo Takahashi, Nobuhide Yoshida
  • Publication number: 20130027234
    Abstract: 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: Application
    Filed: March 1, 2011
    Publication date: January 31, 2013
    Applicant: NEC CORPORATION
    Inventors: Nobuhide Yoshida, Hidemi Noguchi
  • Publication number: 20100085969
    Abstract: 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: Application
    Filed: November 16, 2007
    Publication date: April 8, 2010
    Inventors: Yuuichi Aoki, Tohru Kimura, Hitoshi Yano, Nobuhide Yoshida, Daigo Taguchi, Akitake Mitsuhashi, Jun Noda, Teruki Sukenari, Kunihiro Suzuki, Koji Fukami