Abstract: A secondary battery system includes a secondary battery and a controller. The secondary battery has a charging state including at least first to third sections. The controller controls a current flowing through the secondary battery so as to be smaller than a predetermined current in the first and third sections, and controls the current flowing through the secondary battery so as to be larger than the predetermined current in the second section.

Abstract: A charge and discharge control device that controls charging and discharging of a battery module in which a plurality of cell blocks, each including one or more unit cells, are connected in parallel to one another. A controller of the charge and discharge control device controls a current flowing through each of the cell blocks based on at least one of a current load of each of the cell blocks or a parameter relating to the current load.

Abstract: A parameter estimation apparatus of an embodiment of the present invention is provided with a model reduction processor and a parameter estimator. The model reduction processor generates reduced order models by reducing order of a simulation model on the basis of measurement data sets and conditions for model order reduction possibility. The parameter estimator estimates values of parameters of the reduced order models on the basis of the reduced order models and the measurement data sets corresponding to the reduced order models. Further, after estimating a first value for a first parameter of a first reduced order model based on a first measurement data set, the parameter estimator applies the first value to the first parameter of a second reduced order model based on a second measurement data set.

Abstract: A charge/discharge control apparatus according to one aspect of the present invention is an apparatus that controls charge or discharge of a secondary battery to be charged or discharged on the basis of at least one condition of use calculated from a deterioration model or a deterioration map of a secondary battery and at least one inner state parameter of the secondary battery to be charged or discharged. The charge/discharge control apparatus updates the condition of use on the basis of change of the inner state parameter.

Abstract: A spatial-information generation apparatus according to an embodiment of the present invention includes a reference-plane acquirer, a simplification-section setter, and a shape simplifier. The reference-plane acquirer acquires, on the basis of a first spatial object related to a first space, first attribute information indicating attributes of the first spatial object, and first relation information indicating a relation between the first spatial object and objects of other constituent elements of the building, a reference plane object related to a plane of a part of the first space from the first spatial object and generates a shape of the reference plane object. The simplification-section setter sets a simplification section, which is a target to be simplified, in the shape of the reference plane object. The shape simplifier simplifies the shape of the reference plane object in the simplification section to thereby generate the reference plane object in the simplified shape.

Abstract: According to an embodiment, there is provided a charge and discharge control device that controls charging and discharging of a battery module in which a plurality of cell blocks, each including one or more unit cells, are connected in parallel to one another. A controller of the charge and discharge control device controls a current flowing through each of the cell blocks based on at least one of a current load of each of the cell blocks or a parameter relating to the current load.

Abstract: According to one embodiment, a secondary battery system includes a secondary battery, a first measurement part, a designation part, and a controller. The first measurement part measures a volume change of the secondary battery. The designation part designates a threshold value. The controller controls a current flowing through the secondary battery, based on the volume change of the secondary battery measured by the first measurement part and the threshold value.

Abstract: A secondary battery system includes a secondary battery, a measurement part, a designation part, and a controller. The measurement part measures a volume change rate of the secondary battery. The designation part designates a threshold value. The controller controls a current flowing through the secondary battery, based on the volume change rate of the secondary battery measured by the measurement part and the threshold value.

Abstract: According to an embodiment, a cell state calculation apparatus includes the following elements. The database stores a function indicating a relationship between a voltage and a charged capacity of an active material. The active material amount calculation unit calculates an amount of an active material of the secondary cell by referring to the database and by using the voltage detected by the voltage detector and the current detected by the current detector while the secondary cell is charged or discharged. The open circuit voltage calculation unit calculates a function indicating a relationship between an open circuit voltage and a charged capacity of the secondary cell by referring to the database and by using the calculated amount of the active material.

Abstract: A battery information provision system, which is an embodiment of the present invention, includes: a storage device that stores battery information; a first server configured to extract the battery information from the storage device; and a second server configured to transmit the extracted battery information to a communication device. The battery information is information related to rechargeable batteries or devices including rechargeable batteries, and includes information corresponding to evaluation categories determined according to deterioration states of the rechargeable batteries. The first server extracts battery information corresponding to both a battery or a device designated by the communication device and an evaluation category designated by the communication device.

Abstract: A storage battery controlling device according to an embodiment of the present invention includes: a battery characteristic estimator configured to calculate an internal resistance of a secondary battery and a function indicating relationship between an open circuit voltage of the secondary battery and a state of charge or an amount of a charge charged of the secondary battery therein, on the basis of data of a temperature, a voltage and a current of the secondary battery which are measured in charging or discharging the secondary battery; and an input/output performance value calculator configured to calculate an inputtable/outputtable power amount of the secondary battery on the basis of the internal resistance and the function calculated by the battery characteristic estimator.

Abstract: A charge control apparatus according to an embodiment controls charge of a secondary battery to be charged, on the basis of a charge pattern which is calculated from inner state parameters of the secondary battery to be charged, and of a deterioration model or deterioration map of a secondary battery. The charge control apparatus updates the charge pattern on the basis of change of the inner state parameters.

Abstract: According to an embodiment, a detection system includes a wheel, at least one sensor, a generation unit, and a diagnosis unit. The wheel has an outer edge including an inner wall in which an installation surface is provided. The at least one sensor is installed on the installation surface to detect an elastic wave transmitted from at least one of the wheel and a structure making contact with the wheel. The generation unit is configured to generate time information representing time at which the elastic wave is detected, and feature information representing features of the elastic wave. The diagnosis unit is configured to diagnose, on the basis of the time information and the feature information, a position of a damaged portion of at least one of the wheel and the structure, and a degree of damage of the damaged portion.

Abstract: According to one embodiment, an electric-vehicle testing apparatus includes processing circuitry. The circuitry generates a first signal corresponding to accelerator operation amount and a second signal corresponding to brake operation amount in accordance with test conditions. The circuitry controls torque of a test motor included in a test object. The circuitry computes running resistance to be assumed using a rotation speed of the test motor. The circuitry computes braking force using the second signal and an actual vehicle speed obtained from the rotation speed of the test motor. The circuitry controls torque of a load motor coupled to the test motor, based on a second command value corresponding to the running resistance and the braking force.

Abstract: According to an embodiment, a calculation apparatus includes a first calculator, a second calculator and a third calculator. The first calculator performs a regression analysis to calculate internal state parameters including a quantity of active material and an initial charged capacity of at least the first electrode. The second calculator calculates, based on the internal state parameters, an upper limit charged capacity in a predetermined range based a charged capacity at which an open circuit voltage of the rechargeable battery reaches an upper limit voltage. The third calculator changes the quantity of active material of the first electrode to a fixed value, and recalculates the initial charged capacity of the first electrode used on the fixed value and the upper limit charged capacity.

Abstract: According to one embodiment, a calculation apparatus includes a calculator. The calculator calculates a relationship between a charge amount and a potential according to an arbitrary initial charge amount based on a relationship between a charge amount and a potential of an electrode of a secondary battery on a charge side and a relationship between a charge amount and a potential of the electrode on a discharge side.

Abstract: According to one embodiment, a secondary battery system includes a secondary battery, a first measurement part, a designation part, and a controller. The first measurement part measures a volume change of the secondary battery. The designation part designates a threshold value. The controller controls a current flowing through the secondary battery, based on the volume change of the secondary battery measured by the first measurement part and the threshold value.

Abstract: A battery safety evaluation apparatus according to one aspect of the present invention includes a battery characteristic estimator, a heat amount estimator and safety index calculator. The battery characteristic estimator estimates an estimation value of an inner state parameter of a first battery on the basis of data on voltage and current of the first battery measured in charging or discharging. The heat amount estimator estimates a heat amount of the first battery upon change of an external temperature on the basis of first reference data which is at least indicating relationship between a heat amount of a secondary battery and the external temperature and is set to correspond to the first battery on the basis of the estimation value. The safety index calculator calculates a safety index regarding a temperature of the first battery upon change of the external temperature on the basis of the estimated heat amount.

Abstract: According to one embodiment, a battery includes: a first wire; a second wire; a third wire; a first resistor; a first switch; a second switch; a second resistor; a voltage measurer; and a controller that calculates a second resistance value of the third wire using a first voltage of a first battery when the first switch is turned on and the second switch is turned off, a second voltage of a second battery when the first switch is turned on and the second switch is turned off, a third voltage of the second battery when the first switch is turned off and the second switch is turned off, and a first resistance value of the first resistor.

Abstract: A parameter estimation apparatus of an embodiment of the present invention is provided with a model reduction processor and a parameter estimator. The model reduction processor generates reduced order models by reducing order of a simulation model on the basis of measurement data sets and conditions for model order reduction possibility. The parameter estimator estimates values of parameters of the reduced order models on the basis of the reduced order models and the measurement data sets corresponding to the reduced order models. Further, after estimating a first value for a first parameter of a first reduced order model based on a first measurement data set, the parameter estimator applies the first value to the first parameter of a second reduced order model based on a second measurement data set.