Abstract:
According to an embodiment, an information processing device includes one or more processors configured to: analyze operation data of a battery and calculate feature information indicating a feature of charging/discharging by the battery; select, in accordance with the feature information, an estimation method among a plurality of estimation methods for estimating a state of the battery from the operation data; and estimate the state from the operation data using the selected estimation method.
Abstract:
According to one embodiment, an information processing apparatus, includes: processing circuitry configured to calculate, based on measured data of a voltage value and a charge amount of a rechargeable battery which is controlled for charge/discharge according to a charge/discharge command value, first information indicating a change of the voltage value with respect to the charge amount; and acquire second information indicating a reference change of a voltage value with respect to a charge amount in accordance with a range of the voltage values in the measured data and estimate a state of the rechargeable battery based on the first information and the second information.
Abstract:
According to one embodiment, a storage battery evaluation device includes a charging/discharging controller and a deterioration evaluator. The charging/discharging controller acquires a charging/discharging power command value, performs control to charge and discharge an energy storage device according to the charging/discharging power command value, sets a dead zone in which the charging and discharging is not performed when an absolute value of the charging/discharging power command value is equal to or smaller than a threshold, and performs control to stop the charging and discharging when the charging/discharging command value enters the dead zone. The deterioration evaluator measures a response characteristic of a voltage of the energy storage device at a time when the charging and discharging is stopped from a state in which the energy storage device is charged and discharged and evaluates a deterioration state of the energy storage device on a basis of the response characteristic.
Abstract:
According to one embodiment, an evaluation device for an energy storage device includes first processing circuitry and second processing circuitry. The first processing circuitry acquires data items including an amount of charge and a voltage value measured in a measurement period from the energy storage device, the energy storage device being charge-discharge-controlled according to charge-discharge command values. The second processing circuitry generates a representative data item of voltage values for amounts of charge, based on the data items acquired for the measurement period; and evaluates a degradation state of the energy storage device, based on a relative change between a plurality of the representative data items corresponding to a plurality of the measurement periods.
Abstract:
According to one embodiment, a simulation-signal generation device includes a charge/discharge-condition acquirer to acquire a charge/discharge condition of an energy-storage system; a signal-characteristic-amount acquirer to acquire a plurality of charge/discharge-signal characteristic amounts for the energy-storage system; a characteristic-signal generation processor to generate a plurality of characteristic signals respectively having the plurality of charge/discharge signal characteristic amounts, based on the plurality of charge/discharge signal characteristic amounts; and a simulation-signal generator to synthesize the plurality of characteristic signals to generate a simulation signal serving as a command signal of charge/discharge for the energy-storage system.
Abstract:
A storage battery evaluating apparatus according to an embodiment includes a determiner, a corrector, a QV curve generator, an evaluator, and a feedbacker. The determiner determines a charging/discharging tendency of a storage battery based on measurement data including voltage data. The corrector corrects the voltage data based on a correction parameter. The correction parameter corresponds to at least one of the charging/discharging tendency and a degraded state of the storage battery. The QV curve generator generates a QV curve of the storage battery based on the voltage data which has been corrected. The evaluator evaluates the degraded state based on the QV curve. The feedbacker feeds back, to the corrector, the corrected parameter corresponding to the degraded state.
Abstract:
An information processing apparatus includes: an SoH calculator to calculate an SoH (State of Health) for each of a plurality battery units on the basis of measurement data related to an electric power applied to each of the plurality of battery units in a rechargeable battery; a maximum/minimum voltage SoH calculator to calculate a maximum/minimum voltage SoH which is an SoH based on a maximum voltage and a minimum voltage in voltages applied to a plurality of cells or a plurality of battery subunits in the battery unit for each of the plurality of battery units on the basis of the measurement data; and an SoH ratio calculator to calculate an SoH ratio which is a ratio of the maximum/minimum voltage SoH to the SoH for each of the plurality of battery units on the basis of the calculated SoH and the calculated maximum/minimum voltage SoH.
Abstract:
According to one embodiment, the information processing device includes: a first state estimator configured to estimate a state of a target rechargeable battery based on: first data includes a charge amount and voltage value of a rechargeable battery; information including a state of the rechargeable battery; and second data including a charge amount and voltage value of the rechargeable battery.
Abstract:
According to one embodiment, there is provided a battery apparatus including a battery management device configured to receive voltages and temperatures of cells, and detection data of a current sensor, and a measuring computer configured to calculate a characteristic value of each cell or cell module, based on the detection data acquired from the battery management device at first time intervals, and to send, the acquired detection data or the calculated characteristic value to a control device at second time intervals which are longer than the first time intervals.
Abstract:
The information processing apparatus of the present embodiment includes a processing circuitry configured to: acquire a plurality of pieces of operation data including a minimum voltage among voltages of a plurality of battery cells, and a maximum voltage among the voltages of the plurality of battery cells, the plurality of battery cells being included in a rechargeable battery, and identification information identifying between charge or discharge of the rechargeable battery; generate, based on the plurality of pieces of operation data, evaluation target voltages by combining one of maximum voltages of the charge and minimum voltages of the charge and one of maximum voltages of the discharge and minimum voltages of the discharge; and determine, based on a voltage distribution of the evaluation target voltages, a state of the rechargeable battery.