Abstract: A battery charger as an embodiment of the present invention includes a charger/discharger, a measurer, an estimator, a determinator, and an outputter. The charger/discharger can charge and discharge a connected battery. The measurer measures a voltage and current of the battery during charging and generates measurement data. The estimator estimates a deterioration state of the battery on the basis of the measurement data. The determinator determines whether or not the battery is usable, on the basis of the estimated deterioration state of the battery. The outputter outputs information about the determination as to whether or not the battery is usable.

Abstract: According to one embodiment, a battery control device includes a charge and discharge circuit and a processor. The processor determines, based on an information regarding a secondary battery electrically connected to the charge and discharge circuit, whether or not a diagnosis implementation condition is satisfied; controls the charge and discharge circuit to charge the secondary battery only after discharging or charging up to a charging-start SOC if the diagnosis implementation condition is satisfied; acquires measurement data of a voltage and a current of the secondary battery while charging; estimates an internal state parameter of the secondary battery based on the measurement data; and diagnoses a deterioration state of the secondary battery based on the internal state parameter of the secondary battery.

Abstract: According to an embodiment, an internal state estimation apparatus includes a capacity estimator, a charge amount estimator, and a SOC estimator. The capacity estimator calculates an estimate capacity of the electrode based on an estimate capacity of the electrode at the first time point, a coefficient that is dependent at least on a SOC of the electrode at the first time point, and the time difference. The charge amount estimator calculates an estimate initial charge amount of the electrode based on an estimate initial charge amount and capacity of the electrode, and the estimate battery charge amount at the first time point, the coefficient, and the time difference. The SOC estimator calculates a SOC estimate of the electrode based on the estimate battery charge amount, and the estimate initial charge amount and capacity of the electrode.

Abstract: With a charge and discharge control method according to one embodiment, measurement data regarding a parameter relating to a battery of a battery-mounted device at the time of battery charge or discharge, is acquired. Furthermore, with the charge and discharge control method, a control instruction relating to the charge and discharge of the battery and corresponding to at least a result of a diagnosis of a deterioration state of the battery based on the measurement data, is received from the outside of the battery-mounted device. With the charge and discharge control method, the charge and discharge of the battery is controlled based on the received control instruction.

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: According to one embodiment, a battery control device includes a charge and discharge circuit and a processor. The processor determines, based on an information regarding a secondary battery electrically connected to the charge and discharge circuit, whether or not a diagnosis implementation condition is satisfied; controls the charge and discharge circuit to charge the secondary battery only after discharging or charging up to a charging-start SOC if the diagnosis implementation condition is satisfied; acquires measurement data of a voltage and a current of the secondary battery while charging; estimates an internal state parameter of the secondary battery based on the measurement data; and diagnoses a deterioration state of the secondary battery based on the internal state parameter of the secondary battery.

Abstract: According to one embodiment, a remanufacturing support server includes processor. The processor is configured to: acquire specification data representing required performance of a battery product; set an allowable range of a degradation state of a secondary battery to be used in the battery product; acquire diagnostic data indicating a diagnostic result of a degradation state of a secondary battery mounted on a vehicle, the diagnostic result of the degradation state of the secondary battery falling within the allowable range as the battery product; and provide an outside with a remanufacturing plan relating to the battery product based on the diagnostic data.

Abstract: A battery safety evaluation apparatus as an aspect of the present invention includes an estimator, a calculator, and an evaluator. The estimator estimates an estimation value of an inner state parameter of a battery to be evaluated on the basis of data of its voltage and current measured in charging or discharging it. The calculator calculates an index regarding swelling risk of the battery on the basis of first reference data. The evaluator evaluates, on the basis of the index, a battery swelling risk of the battery to evaluate safety of the battery. The battery is a secondary battery. The first reference data is reference data considered to correspond to the battery from the reference data on the basis of estimation value. The reference data indicates at least one of relationships between a positive electrode capacity, a negative electrode capacity and an SOC deviation of a secondary battery.

Abstract: An apparatus which is an embodiment of the present invention includes a first estimator, a second estimator and a calculator, and evaluates the present safety of a battery. The first estimator estimates a present deterioration state and a present SOC of the battery. The second estimator estimates, on the basis of first reference data, a calorific value of the battery in an occasion when an external temperature changes. The first reference data is selected as corresponding to the first battery from a plurality of reference data at least indicating relationship between a calorific value of a secondary battery and an external temperature on the basis of the estimated deterioration state and SOC. The calculator calculates, on the basis of the calorific value of the battery, a safety index regarding a temperature of the battery in the occasion when the external temperature changes.

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: 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: According to an embodiment, a secondary battery system includes a secondary battery, a calculator, and a controller. The secondary battery includes a first electrode including a first and second active materials, and a second electrode including a third active material. The calculator calculates a current ratio of currents passing through the first and second active materials for each of different values of a charge amount of the first electrode, based on capacities and capacity-versus-potential properties of the first and second active materials. The controller, based on the capacities of the first and second active materials and the current ratio when the charge amount of the first electrode takes a first value, controls the current passing through the secondary battery when the charge amount indicates the first value.

Abstract: A battery charger as an embodiment of the present invention includes a charger/discharger, a measurer, an estimator, a determinator, and an outputter. The charger/discharger can charge and discharge a connected battery. The measurer measures a voltage and current of the battery during charging and generates measurement data. The estimator estimates a deterioration state of the battery on the basis of the measurement data. The determinator determines whether or not the battery is usable, on the basis of the estimated deterioration state of the battery. The outputter outputs information about the determination as to whether or not the battery is usable.

Abstract: According to an embodiment, an internal state estimation apparatus includes a capacity estimator, a charge amount estimator, and a SOC estimator. The capacity estimator calculates an estimate capacity of the electrode based on an estimate capacity of the electrode at the first time point, a coefficient that is dependent at least on a SOC of the electrode at the first time point, and the time difference. The charge amount estimator calculates an estimate initial charge amount of the electrode based on an estimate initial charge amount and capacity of the electrode, and the estimate battery charge amount at the first time point, the coefficient, and the time difference. The SOC estimator calculates a SOC estimate of the electrode based on the estimate battery charge amount, and the estimate initial charge amount and capacity of the electrode.

Abstract: A charge control device as an embodiment of the present invention includes a charge controller and a determiner. The charge controller controls charging of a secondary battery. The determiner determines whether or not the secondary battery is being used in charging of the secondary battery. When it is determined that the secondary battery is being used, the charge controller stops charging of the secondary battery before the secondary battery is fully charged.

Abstract: A battery state estimating apparatus as an embodiment of the present invention includes a state estimator, a power estimator, and a determiner. The state estimator estimates a state of a battery. The power estimator estimates first power amount charged/discharged by the battery within a charging/discharging period, based on the state. The determiner compares the first power amount with second power amount inputted/outputted to/from the battery within the charging/discharging period and thereby determines validity of the state.

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: An apparatus which is an embodiment of the present invention includes a first estimator, a second estimator and a calculator, and evaluates the present safety of a battery. The first estimator estimates a present deterioration state and a present SOC of the battery. The second estimator estimates, on the basis of first reference data, a calorific value of the battery in an occasion when an external temperature changes. The first reference data is selected as corresponding to the first battery from a plurality of reference data at least indicating relationship between a calorific value of a secondary battery and an external temperature on the basis of the estimated deterioration state and SOC. The calculator calculates, on the basis of the calorific value of the battery, a safety index regarding a temperature of the battery in the occasion when the external temperature changes.