Nec Corporation

Nec Engineering, Ltd.

Nobuhide Yoshida

Shingo Takahashi

Yuan Luo

Noriyuki Itabashi

Kenichi Maruhashi

Junichi Miyamoto

Shinya Ohhata

Junji Kogure

Kenji Kobayashi

Tohru Kimura

Noriaki Matsuno

Hidemi Noguchi

Hitoshi Yano

Masahiro Fujii

Tadashi Maeda

Koji Fukami

Yasuo Ohno

Keiichi Numata

Jun Noda

Yuuichi Aoki

Akitake Mitsuhashi

Daigo Taguchi

Teruki Sukenari

Takao Atsumo

Kunihiro Suzuki

A charge and discharge device () includes: a battery unit () in which m (m is an integer of 3 or more) battery cells () that are connected in series are grouped into plural groups () including n (n is an integer equal to or larger than 2 and smaller than m) battery cells () that are continuously arranged and a part of the battery cells () that belong to a certain group is shared by a different group; a cell balance unit () that is provided for each group () and uniformizes voltages of the battery cells () that belong to the group (); and a control unit () that stops the operation of the cell balance unit (), when a voltage difference of the battery cells () that belong to an arbitrary one of the groups () is within a predetermined value, and when a total average voltage in all the battery cells () and a partial average voltage which is an average voltage of the battery cells () that belong to the arbitrary group () satisfy a specific condition, the cell balance unit () corresponding to the arbitrary group ().

Charge and discharge device, charge and discharge control method, and program

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.

Method and program for controlling power storage system and storage battery

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 calculated based on an amount of charging current of said each charging secondary battery, a SOC of said each charging secondary battery, and the required time, and calculates a total value of the expected number and an existing number of said charging secondary batteries among said plurality of secondary batteries which are already fully charged; and a control unit that determines whether or not to raise the charging current rate based on the total value.

Battery control device, power storage device, power storage method, and program

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 () that outputs during the measurement period measurement information based on predetermined measurement; and a transmission section () 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.

Sensor and receiving device in sensor system

A battery control device () includes: a measurement unit () that measures a voltage of a secondary battery; a control unit () 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 () is less than the first reference value; and an adjustment unit () 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.

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 () of the present invention is provided with: a power supply monitoring unit (), 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 (), 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.

Monitoring and controlling power supply apparatus and method

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.

Storage battery device and charging control method

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.

Time-interleaved A/D converter apparatus including correction signal part outputting a dispersion compensation control signal

A communication network of the present invention includes: a plurality of superordinate nodestoforming a cascade type topology; and a plurality of terminal nodesto, 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.

Communication network, information processor and address assigning method

A dispersion determining apparatus comprises a received waveform monitoring part () and a dispersion amount determining part (). The received waveform monitoring part () has a waveform monitoring circuit () that samples data from the received waveform of a received signal having propagated along a transmission path, and a histogram extracting circuit () that extracts, based on the sampled data obtained by the waveform monitoring circuit (), a histogram data representative of the intensity distribution in the voltage direction of the received waveform. The dispersion amount determining part () has a polarized wave dispersion estimating circuit () 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 () and then estimates, based on the determined asymmetric degree, a polarized wave dispersion amount in the transmission path.

Dispersion determining apparatus and automatic dispersion compensating system using the same

In a switching speed fluctuation detecting apparatus, an input terminal for receiving a signal having a definite time period, a series arrangement of at least one first logic circuit connected to the input terminal, a second logic circuit having a first input connected to the input terminal and a second input connected to an output of the series arrangement and an integrator connected to an output of the second logic circuit are provided.

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Tokyo, Japan

Nobuhide Yoshida