Abstract: A method of estimating, as the charging rate of an electricity storage system, the internal condition of the electricity storage system including plural batteries, and an internal condition estimating system utilizing that method are provided. A voltage measuring unit 3 measures voltages of all batteries 1 configuring an electricity storage system block 2. A system cell voltage determining unit 5 determines a system cell voltage that will be a reference for an estimation of the SOC value of the electricity storage system block 2 based on the voltage value of the plural batteries 1 measured by the voltage measuring unit 3. The system cell voltage determining unit 5 obtains the system cell voltage by giving a weighting to the voltage value in accordance with the pre-calculated SOC value of the electricity storage system block 2. The system SOC estimating unit 6 estimates the SOC value of the electricity storage system block 2 based on the current flowing through the battery 1 and the system cell voltage.

Abstract: An electricity storage system includes a plurality of chargeable and dischargeable battery boards, a plurality of PCSs connected to the respective battery boards, and charging and discharging the connected batteries, and a battery controller distributing a charging and discharging power value of the entire system as an instruction value to each of the PCSs at a constant cycle or at an arbitrary timing. The battery controller gives a charging and discharging instruction for a predefined test charging and discharging to the selected battery board, and distributes, to all the battery boards except the selected battery board, a value obtained by subtracting a charging and discharging power value for the test charging and discharging from a charging and discharging power value for the entire system.

Abstract: A secondary battery system and a method of arranging battery modules capable of recovering and maintaining the system performance are provided. A secondary battery system includes a battery cabinet group including a plurality of battery cabinets each comprising a plurality of battery modules connected to each other, the battery module being a replacement unit, a PCS connected to the battery cabinet group and is controlling charging and discharging thereof, and a battery controller connected to the PCS. The battery controller includes a deterioration inspecting block obtaining a characteristic of the battery modules, a numbering block numbering the battery modules in an ascending order based on the characteristics, and a re-arrangement determining block determining a re-arrangement position of the battery modules in a way that the numbers given by the numbering block are in sequence in the same battery cabinet.

Abstract: A system interconnecting facility is connected to a power system, and includes a plurality of power converters connected to the power system, a plurality of transformers provided between the power system and the power converters, a plurality of switches provided between the transformers and the power converters, and a controller that controls the opening and closing of the switch. The controller outputs, to the switches, open and close commands in so that the number of closed switches is out of a closed switch number range where a harmonic voltage of the system interconnecting facility increases, based on a harmonic voltage containing rate characteristic that is a relation between the number of closed switches and a harmonic voltage containing rate of the system interconnecting facility. The system interconnecting facility is capable of suppressing a harmonic voltage even if a circuit structure differs depending on a situation.

Abstract: According to one embodiment, a storage battery management device includes a chargeable/dischargeable capacity table, a controller, and a communication controller. The chargeable/dischargeable capacity table stores therein in advance a chargeable/dischargeable capacity corresponding to a temperature, a state of charge (SOC), a required charge rate or discharge rate, and a battery degradation rate of a secondary battery. The controller calculates an actual chargeable/dischargeable capacity by referring to the chargeable/dischargeable capacity table based on the temperature, the SOC, the required charge rate or discharge rate, and the battery degradation rate of the secondary battery. The communication controller informs a host device about the chargeable/dischargeable capacity of the secondary battery.

Abstract: According to one embodiment, a storage battery device in which a plurality of battery boards are connected in parallel, each of the battery boards including a plurality of cell modules connected in series, and each of the cell modules including a battery cell, includes a performance value acquisition unit and an information generator. The performance value acquisition unit acquires a performance value of the cell module. The information generator generates rearrangement information. The rearrangement information is information for performing rearrangement of the cell module between the plurality of battery boards based on the acquired performance value of the cell module to reduce a variation in the performance value of the cell module after being rearranged in one battery board than before being rearranged.

Abstract: An electricity storage system includes a plurality of chargeable and dischargeable battery boards, a plurality of PCSs connected to the respective battery boards, and charging and discharging the connected batteries, and a battery controller distributing a charging and discharging power value of the entire system as an instruction value to each of the PCSs at a constant cycle or at an arbitrary timing. The battery controller gives a charging and discharging instruction for a predefined test charging and discharging to the selected battery board, and distributes, to all the battery boards except the selected battery board, a value obtained by subtracting a charging and discharging power value for the test charging and discharging from a charging and discharging power value for the entire system.

Abstract: A control device of a power storage apparatus according to an embodiment includes a wind speed acquiring device, a power generation output detector, a capacity detector, and a controller. The wind speed acquiring device acquires a wind speed. The power generation output detector detects a power generation output of a wind power generation apparatus connected to a power system. The capacity detector detects a remaining capacity of the power storage apparatus that stores at least a portion of a power in the power generation output and supplies at least a portion of the stored power to the power system. The controller controls storage and supply of the power to suppress a variation in a combined output obtained by combining the power generation output and the power stored or supplied by the power storage apparatus, based on the wind speed, the power generation output, and the remaining capacity.

Abstract: A storage system includes a storage battery, a first deriver, a second deriver, and a corrector. The storage battery performs charging and discharging of electricity. The first deriver derives a first state of charge (SOC) based on a voltage of the storage battery when a current is not flowing to the storage battery. The second deriver derives a second SOC based on a battery capacity of the storage battery and an integrated value of a current flowing to the storage battery. The corrector corrects the battery capacity of the storage battery which is used by the second deriver based on a difference between the second SOC derived by the second deriver and the first SOC derived by the first deriver after the derivation of the second SOC. Furthermore, the corrector changes a correction quantity of the correction in accordance with a state of the storage battery.

Abstract: A secondary battery system including plural batteries, extends the lifetime of each battery, and improves the charge/discharge (energy) efficiency of a whole system is provided. A secondary battery system includes plural batteries individually controllable for charging/discharging, plural PCSs each connected to the corresponding battery and performing charging/discharging to the connected battery, and a battery controller distributing a charge/discharge power value as a whole system to each of the PCSs at a fixed cycle or an arbitrary timing. The battery controller includes a preference order calculator setting a preference order to the plural batteries at each time point based on a deterioration characteristic of each battery related to each SOC thereof, and a distribution rate determining unit distributing the charge/discharge power value to the PCSs in accordance with the preference order.

Abstract: A battery-system deterioration control device compatible to diversification of applications by appropriately learning a necessary deterioration model for a deterioration control. The battery-system deterioration control device includes a utilization-record-data obtaining block, a learning instruction block, and a learning block. The utilization-record-data obtaining block obtains utilization record data of a battery cell. The learning block updates a data amount of a deterioration model parameter indicating the deterioration state of the battery cell based on the utilization record data, learns the deterioration model parameter, and outputs the learnt result that is a deterioration rate table. The learning instruction block compares the utilization record data and the data amount that is the estimation value, determines the necessity of learning of the deterioration model parameter, and outputs a learning instruction signal to the learning unit.

Abstract: According to one embodiment, an energy storage battery includes: a plurality of cells; an acquirer to acquire measured values of state amounts of the cells; a first parameter calculator to calculate first parameters for evaluating the cells, based on the measured values; and a communicator to transmit the first parameters to a monitoring controller via a communication network.

Abstract: A secondary battery system and a method of arranging battery modules capable of recovering and maintaining the system performance are provided. A secondary battery system includes a battery cabinet group including a plurality of battery cabinets each comprising a plurality of battery modules connected to each other, the battery module being a replacement unit, a PCS connected to the battery cabinet group and is controlling charging and discharging thereof, and a battery controller connected to the PCS. The battery controller includes a deterioration inspecting block obtaining a characteristic of the battery modules, a numbering block numbering the battery modules in an ascending order based on the characteristics, and a re-arrangement determining block determining a re-arrangement position of the battery modules in a way that the numbers given by the numbering block are in sequence in the same battery cabinet.

Abstract: A storage battery management device according to an embodiment includes a chargeable/dischargeable capacity table that stores therein in advance a chargeable/dischargeable capacity corresponding to a temperature, a state of charge (SOC), a required charge rate or discharge rate, and a battery degradation rate of a secondary battery; a controller that calculates an actual chargeable/dischargeable capacity by referring to the chargeable/dischargeable capacity table based on the temperature, the SOC, the required charge rate or discharge rate, and the battery degradation rate of the secondary battery; and a communication controller that informs a host device about the calculated chargeable/dischargeable capacity of the secondary battery. Even in a storage battery system that repeats charging/discharging constantly, this configuration can correctly estimate the actual chargeable/dischargeable capacity and stably operate the storage battery system.

Abstract: A control device of a power storage apparatus according to an embodiment includes a wind speed acquiring device, a power generation output detector, a capacity detector, and a controller. The wind speed acquiring device acquires a wind speed. The power generation output detector detects a power generation output of a wind power generation apparatus connected to a power system. The capacity detector detects a remaining capacity of the power storage apparatus that stores at least a portion of a power in the power generation output and supplies at least a portion of the stored power to the power system. The controller controls storage and supply of the power to suppress a variation in a combined output obtained by combining the power generation output and the power stored or supplied by the power storage apparatus, based on the wind speed, the power generation output, and the remaining capacity.

Abstract: A method of estimating, as the charging rate of an electricity storage system, the internal condition of the electricity storage system including plural batteries, and an internal condition estimating system utilizing that method are provided. A voltage measuring unit 3 measures voltages of all batteries 1 configuring an electricity storage system block 2. A system cell voltage determining unit 5 determines a system cell voltage that will be a reference for an estimation of the SOC value of the electricity storage system block 2 based on the voltage value of the plural batteries 1 measured by the voltage measuring unit 3. The system cell voltage determining unit 5 obtains the system cell voltage by giving a weighting to the voltage value in accordance with the pre-calculated SOC value of the electricity storage system block 2. The system SOC estimating unit 6 estimates the SOC value of the electricity storage system block 2 based on the current flowing through the battery 1 and the system cell voltage.

Abstract: An apparatus is disclosed that includes a resistance measuring unit operable to determine a solution resistance Rsol and a charge transfer resistance Rct of a battery; and at least one computer-readable non-transitory storage medium comprising code, that, when executed by at least one processor, is operable to provide an estimate of the present value of the battery by: comparing Rsol and Rct to historical deterioration transition information; estimating the number of remaining charge cycles before a discharge capacity lower limit is reached by the battery using the comparison; and estimating the number of remaining charge cycles before a discharge time lower limit is reached by the battery using the comparison. The estimate of the present value of the battery includes the smaller of the number of remaining charge cycles before a discharge capacity lower limit is reached or the number of remaining charge cycles before a discharge time lower limit is reached.

Abstract: A secondary battery system including plural batteries, extends the lifetime of each battery, and improves the charge/discharge (energy) efficiency of a whole system is provided. A secondary battery system includes plural batteries individually controllable for charging/discharging, plural PCSs each connected to the corresponding battery and performing charging/discharging to the connected battery, and a battery controller distributing a charge/discharge power value as a whole system to each of the PCSs at a fixed cycle or an arbitrary timing. The battery controller includes a preference order calculator setting a preference order to the plural batteries at each time point based on a deterioration characteristic of each battery related to each SOC thereof, and a distribution rate determining unit distributing the charge/discharge power value to the PCSs in accordance with the preference order.

Abstract: According to one embodiment, a monitoring apparatus comprises a use history accumulating section, a demand prediction generating section, a power generation predicting section, a deterioration table determining section, a charge and discharge schedule creating section, and a transmission section. A use history accumulating section stores a use history of the battery. A deterioration table determining section configured to determine a deterioration table. A charge and discharge schedule creating section configured to create a charge and discharge schedule. A transmission section configured to transmit the demand prediction, the power generation prediction, the charge and discharge schedule, and the deterioration table.

Abstract: An apparatus is disclosed that includes a resistance measuring unit operable to determine a solution resistance Rsol and a charge transfer resistance Rct of a battery; and at least one computer-readable non-transitory storage medium comprising code, that, when executed by at least one processor, is operable to provide an estimate of the present value of the battery by: comparing Rsol and Rct to historical deterioration transition information; estimating the number of remaining charge cycles before a discharge capacity lower limit is reached by the battery using the comparison; and estimating the number of remaining charge cycles before a discharge time lower limit is reached by the battery using the comparison. The estimate of the present value of the battery includes the smaller of the number of remaining charge cycles before a discharge capacity lower limit is reached or the number of remaining charge cycles before a discharge time lower limit is reached.