Ngk Insulators, Inc.

Tetsuya Hatta

Hiroyuki Abe

Tomio Tamakoshi

Masato Komazawa

Tomohiro Yamada

Takatoshi Nehagi

Akihiro Kai

Regarding an independent system, a prediction value of charged/discharged power of a storage battery is calculated, based on a prediction value of generated power of a renewable energy power generator, a prediction value of demanded power of a control device, and a prediction value of demanded power of a load on an assumption that a power supply limit is applied to the load. Whether or not charge or discharge of the storage battery with charged/discharged power matching the prediction value of the charged/discharged power of the storage battery is possible is determined. The power supply limit is tightened when it is determined that the charge or discharge of the storage battery is not possible. A limit data indicating a detail of the power supply limit is output when it is determined that the charge or discharge of the storage battery is possible.

Energy management system, independent system, and operation method of independent system

A module battery is housed in a module battery housing rack. An electric cell is housed in a container. The container is provided with a high thermal conductive wall and a low thermal conductive wall. A first portion of a plate overlaps the outer surface of the high thermal conductive wall and a second portion of the plate protrudes from the outer surface. The second portion surrounds the first portion. A first main surface of the plate is brought into direct contact with the outer surface at the first portion and it is apart from the container at the second portion. A second main surface of the plate is exposed to a space, to which heat is allowed to radiate. An opening may or may not be formed at the first portion. A thermal conducting medium may be held between the first wall and the first portion.

Battery housing structure

A battery chamber is formed inside a sealed container. A module battery and a charging/discharging path outside a battery are housed in the battery chamber. In the module battery, an electric cell chamber and an air chamber are formed inside a heat-insulating container. The electric cell chamber and the air chamber are divided by a heat transfer wall. An electric cell of a sodium-sulfur battery, and a charging/discharging path inside a battery are housed in the electric cell chamber. An intake path starts from outside of the sealed container and leads to the air chamber. An exhaust path starts from the air chamber and leads to the sealed container. The blower generates an air flow that sequentially flows through the intake path, the air chamber and the exhaust path. In a case where the cooling of the electric cell chamber is required, the air flow is generated.

Power storage apparatus and method of operating power storage apparatus

A method of controlling a high-temperature storage battery connected to an electric power system, an apparatus for controlling the storage battery, and an electric power control system reside in that, when the temperature of the storage battery is equal to or lower than a reference temperature, charging and discharging the storage battery with charging and discharging electric power, which is the sum of charging and discharging electric power based on a preset process of operating the storage battery and charging and discharging electric power corresponding to charging and discharging cycles each of a continuous charging time of 1 hour or shorter and a continuous discharging time of 1 hour or shorter, for thereby supplying thermal energy to the storage battery.

Method of controlling storage battery, apparatus for controlling storage battery, and electric power control system

An energy amount required for charging from the remaining capacity management value to the vicinity of a charge end and an energy amount required for discharging from the remaining capacity management value to the vicinity of a discharge end are calculated. A charge/discharge energy amount available for the secondary battery is predicted. A time required to complete the correction in the vicinity of the charge end and a time required to complete the correction in the vicinity of the discharge end are predicted based on the calculated energy amount and the predicted energy amount. A correction method having the shorter predicted time of the predicted times is selected. A state of charge of the secondary battery is controlled in such a manner that the remaining capacity management value of the secondary battery is corrected by the selected correction method.

Method for controlling secondary battery and power storage device

A first upper limit and a second upper limit of emission power are set in each of the NaS batteries. The second upper limit is maximum value of the emission power for maintaining the temperature of the NaS battery at an upper limit temperature or less. In allocation of the emission power to each of the NaS batteries, each of the NaS batteries is separated into a preferential virtual battery to which a non-excess of the emission power that does not exceed the second upper limit is allocated and non-preferential virtual battery to which an excess of the emission power that exceeds the second upper limit is allocated, and after the emission power is allocated to all the preferential virtual batteries, the emission power is allocated to each of the non-preferential virtual batteries.

Control apparatus, control apparatus network and control method

A controller, a controller network and a method for controlling a charging/discharging that easily make SOC of secondary batteries close to a target value are provided. An ordering index including difference &#x394;SOCm&#x2550;SOCt-SOCm between the target value SOCt of SOC (state of charge) and a calculated value SOCm of SOC as a main factor is reflected to an order of charging priority and an order of discharging priority of NaS battery. In addition, charging power is allocated to secondary batteries in descending manner of order of discharging priority and discharging power is allocated to the secondary batteries in descending manner order of discharging priority.

Controller, controller network and control method

A power storage device has a NaS battery for storing electric power, a Hall current detector for measuring charge/discharge current value I of the NaS battery, a bidirectional converter for converting electric power between a direct current and an alternating current bidirectionally, and a controller for controlling the power storage device. The controller integrates the charge/discharge current value I of the NaS battery and calculates the calculated value of the discharge capacity in the NaS battery. The controller calculates estimated error Er(t) of the calculated value of the discharge capacity, specifies NaS batterythat requires the correction of the calculated value of the discharge capacity, charges/discharges the NaS battery to a depth of discharge at which the calculated value of the discharge capacity is corrected, and corrects the calculated value of the discharge capacity in the charged/discharged NaS battery.

Battery control device and battery control method

Provided are a control apparatus for a secondary battery and a control method for a secondary battery, which suppress decreases in released power and absorbed power. When a power storage device is requested to release power, a limit for power supply to a power consuming body is set relatively higher, and when the power storage device is requested to absorb power, the limit for power supply to the power consuming body is set relatively lower. When the power storage device is requested to release power, a command value PD for released power is calculated by adding supplied power PS to a requested value PE for released power. When the power storage device is requested to absorb power, a command value PC for charged power is calculated by subtracting the supplied power PS from a requested value PA for absorbed power.

Control apparatus for secondary battery and control method for secondary battery

In an inspecting method of a piezoelectric/electrostrictive actuator having a piezoelectric/electrostrictive element and two or more electrodes, the frequency response characteristics is picked up when a vibration is given to the piezoelectric/electrostrictive actuator, and the amount of displacement of the piezoelectric/electrostrictive actuator is predicted by the frequency response characteristics. The piezoelectric/electrostrictive actuator is precisely inspected without dissolution and destruction and without actual driving as a product.

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Kuwana, Japan

Tetsuya Hatta