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: According to one embodiment, a determination device relating to a plurality of batteries connected in series is provided. The determination device includes a processor. The processor determines a deterioration variance among the batteries, based on first voltage data indicative of a maximum voltage which is greatest among voltages of the batteries in each of measurements in a plurality of periods in charge or discharge of the batteries, and second voltage data indicative of a minimum voltage which is least among the voltages of the batteries in each of the measurements in the periods.

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: According to an embodiment, a diagnosis method of a battery is provided. In the diagnosis method, a similarity to a measurement result of a voltage of the battery is calculated in regard to each of a plurality of voltage arithmetic data calculated by setting an internal state in mutually different states in a voltage model of the battery. In the diagnosis method, a deterioration state of the battery is determined based on the similarity calculated in regard to each of the voltage arithmetic data.

Abstract: In an embodiment, a management method of a secondary battery is provided. In the management method, temperature control of the secondary battery is executed in a second period after a first period in which the secondary battery is diagnosed, when the secondary battery is charged under a charge condition under which precipitation of lithium metal in the secondary battery is predicted based on a diagnosis result in the first period. In the temperature control of the secondary battery, a temperature of the secondary battery after a time point of an end of charge under the charge condition in the second period is kept in a predetermined temperature range of a lower-limit temperature to an upper-limit temperature.

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: According to an embodiment, a diagnosis method of a battery is provided. In the diagnosis method, based on an internal state of the battery at a plurality of mutually different times, a time when the internal state of the battery becomes a predetermined state after the plurality of mutually different times is estimated.

Abstract: In a management method of a secondary battery of one embodiment, a charge pattern in charge planned to be executed is set based on estimation data including an estimation result of an internal state of the secondary battery based on a measurement result of an electric current and a voltage of the secondary battery, target data including a target time for charging the secondary battery in the charge planned to be executed, and relation data indicative a relation of each of the internal state of the secondary battery and a charge condition of the secondary battery to a deterioration rate of the secondary battery. The charge pattern is set to be a charge pattern in which the deterioration rate does not exceed a threshold and the secondary battery is charged during the target time.

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: 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 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: According to an embodiment, a diagnosis method of a battery is provided. In the diagnosis method, based on an internal state of the battery at a plurality of mutually different times, a time when the internal state of the battery becomes a predetermined state after the plurality of mutually different times is estimated.

Abstract: [PROBLEM] To provide a data distribution platform for data about storage batteries. [SOLVING MEANS] An information system for storage batteries according to an embodiment accepts registration of information about a manufactured storage battery from a first terminal and registration of a use history of a storage battery from a second terminal, the use history including battery state information acquired at each of points in time during a period of use of the storage battery, and accumulates the information about the storage battery and the use history. The information system uses the registered information about the storage battery and/or the registered use history to create an internal state estimation result with a predetermined evaluation technique, and accumulates the internal state estimation result as platform-based evaluation information in association with the registered information and/or the registered use history.

Abstract: According to an embodiment, a diagnosis method of a battery is provided. In the diagnosis method, a similarity to a measurement result of a voltage of the battery is calculated in regard to each of a plurality of voltage arithmetic data calculated by setting an internal state in mutually different states in a voltage model of the battery. In the diagnosis method, a deterioration state of the battery is determined based on the similarity calculated in regard to each of the voltage arithmetic data.

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 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: According to one embodiment, a management method of a storage battery including a plurality of batteries is provided. In the management method, replacement data is generated based on at least an estimation result of an internal state of each of the batteries, and deterioration rate data indicative of a deterioration rate of battery characteristics in each of the batteries, the deterioration rate data being based on the estimation result of the internal state. The replacement data includes information indicative of a target battery which is a target of replacement among the batteries, information relating to a battery with which the target battery is replaced, and information relating to a time of replacement of the target battery.

Abstract: According to one embodiment, a determination device relating to a plurality of batteries connected in series is provided. The determination device includes a processor. The processor determines a deterioration variance among the batteries, based on first voltage data indicative of a maximum voltage which is greatest among voltages of the batteries in each of measurements in a plurality of periods in charge or discharge of the batteries, and second voltage data indicative of a minimum voltage which is least among the voltages of the batteries in each of the measurements in the periods.

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.