Abstract: According to an embodiment, a battery module includes a cell group in which a first cell and a second cell are connected in parallel, a first circuit breaker mechanism configured to disconnect connection between the first cell and the second cell when a temperature of the first cell is equal to or higher than a first temperature, and a connection mechanism configured to connect the first cell to a discharge circuit when the temperature of the first cell is equal to or higher than a second temperature higher than the first temperature.

Abstract: A battery module in embodiment includes two cell blocks electrically connected in series and a bus bar, and each of the cell blocks includes a plurality of battery cells electrically connected in parallel. The bus bar forms one or more intra-block connection portions each of which connects two corresponding battery cells belonging to a same cell block to each other for each of the cell blocks, and forms a plurality of inter-block connection portions each of which connects two corresponding battery cells belonging to different cell blocks to each other. In the bus bar, the resistance of each of the intra-block connection portions is higher than the resistance of any of the inter-block connection portions.

Abstract: In an embodiment, a diagnosis method of an electrolytic unit in which an electrochemical reaction occurs with a feed supplied by input of electric power is provided. In the diagnosis method, for the electrolytic unit, each of a membrane resistance caused by a membrane, an anode resistance caused by an anode, and a cathode resistance caused by a cathode is estimated based on a measurement result of a frequency characteristic of an impedance. In the diagnosis method, an operation status and a deterioration state of the electrolytic unit are determined based on time changes of the membrane resistance, the anode resistance, and the cathode resistance.

Abstract: According to an embodiment, an information processing device includes a processing circuit configured to: obtain a first evaluation index of a plurality of unit cells in a battery module, and obtain a second evaluation index in a case where a first unit cell in the battery module and a second unit cell in the battery module are swapped on a basis of the first evaluation index, wherein the first evaluation index and the second evaluation index are obtained on a basis of a positive electrode potential and a temperature rise rate.

Abstract: In embodiments, an information processing method for a battery includes: calculating, based on operation plan information indicating an operation plan of either the battery or a battery-mounted apparatus in which the battery is mounted, time-series data indicating a time change in each of a current, a voltage, and a temperature of the battery of a case where the battery is operated in accordance with the operation plan in the operation plan information. In the information processing method, a degradation state of the battery of the case where the battery is operated in accordance with the operation plan is calculated using the calculated time-series data.

Abstract: In an embodiment, a diagnosis apparatus for an electrochemical module in which at least one of an anode and a cathode includes a catalyst is provided, and the diagnosis apparatus includes an output circuit and a processor. The processor, in a state in which the operation power is input to the electrochemical module or the operation power is output from the electrochemical module, superimposes the inspection power on the operation power by supplying the inspection power from the output circuit to the electrochemical module, and measures measurement data for diagnosis by measuring a current and a voltage for the electrochemical module in a state in which the inspection power is superimposed on the operation power.

Abstract: In an embodiment, a processing method related to an electrochemical cell, in which at least one of an anode and a cathode includes a catalyst, is provided. In the processing method, whether or not a target electrochemical cell can be reused as it is determined based on a sum of a cell membrane resistance caused by a membrane and a cell catalyst resistance caused by a catalyst. In the processing method, whether or not the target electrochemical cell can be regenerated without separating the anode and the cathode is determined based on the cell catalyst resistance when it is determined that the target electrochemical cell cannot be reused as it is.

Abstract: In a diagnosis method of a battery of an embodiment, based on a measurement result of a first impedance of a battery at a first frequency, it is determined, for each of a plurality of SOC values, whether an absolute value of a change ratio of the first impedance to the SOC is not more than a reference value. In the diagnosis method, for a target SOC value whose absolute value of the change ratio is not more than the reference value in the plurality of SOC values, a second impedance of the battery at a second frequency higher than the first frequency is measured. In the diagnosis method, determination concerning the state of the battery is performed based on the measurement results of the first impedance and the second impedance for the target SOC value.

Abstract: According to a storage battery of an embodiment includes a first battery module and a second battery module connected in parallel with the first battery module. The number of first cells connected in series in the first battery module is M, and the number of second cells connected in series in the second battery module is N. When an open circuit voltage at SOC=X % of the first cells and the second cells are Va1 (X) and Va2 (X), respectively, the voltages of the battery modules are M×Va1 (X)<N×Va2 (X) in the range where the SOC of the cell is 0% to 30%, and M×Va1 (X)>N×Va2 (X) in the range where the SOC of the cell is 70% to 100%.

Abstract: In an embodiment, in a processing method for a battery, whether a target battery is regenerable without separating an electrode active material serving as a positive electrode active material and an electrode active material serving as a negative electrode active material of the target battery from an electrode group, based on the analysis result of measurement data for the target battery.

Abstract: In a diagnosis method of a battery of an embodiment, based on a measurement result of a first impedance of a battery at a first frequency, it is determined, for each of a plurality of SOC values, whether an absolute value of a change ratio of the first impedance to the SOC is not more than a reference value. In the diagnosis method, for a target SOC value whose absolute value of the change ratio is not more than the reference value in the plurality of SOC values, a second impedance of the battery at a second frequency higher than the first frequency is measured. In the diagnosis method, determination concerning the state of the battery is performed based on the measurement results of the first impedance and the second impedance for the target SOC value.

Abstract: In a charging method of a battery of an embodiment, at each of a first time point and a second time point after a time point at which a predetermined time is elapsed from the first time point, a superimposed current obtained by superimposing a current waveform that periodically changes at a predetermined frequency on a charging current is input to the battery, thereby measuring, concerning an impedance of the battery at the predetermined frequency, a first impedance at the first time point and a second impedance at the second time point. In the charging method, using a parameter representing an increase state of the second impedance to the first impedance as an index, a current value of the charging current is adjusted.

Abstract: In a diagnosis method of an embodiment, a battery, which includes, as electrode active materials, a first electrode active material whose impedance has a first natural frequency and a second natural frequency lower than the first natural frequency and a second electrode active material whose impedance has a third natural frequency with a magnitude between the first natural frequency and the second natural frequency, is diagnosed. In the method, an impedance of the battery is measured at each of a plurality of measurement target frequencies by setting, as a measurement range, a first measurement range including the first natural frequency and not including the second and third natural frequencies, and a second measurement range including the second natural frequency and not including the first and third natural frequencies.

Abstract: In an embodiment, a diagnosis method of a secondary battery, which includes a first electrode including a first electrode active material that performs a two-phase coexistence reaction, and a second electrode including a second active material that performs a single-phase reaction and having a polarity opposite to a polarity of the first electrode, is provided. In the method, a relationship between an SOC of the secondary battery and at least one of a charge transfer resistance and a vertex frequency of the second electrode is acquired by calculating at least one of the charge transfer resistance and the vertex frequency of the second electrode based on a measurement result of an impedance of the secondary battery for each of a plurality of SOC values of the secondary battery.

Abstract: In an embodiment, an aging determination method of a battery as a target of determination is provided. With regard to a target electrode which is at least one of a positive electrode and a negative electrode of the battery, the method estimates a correction coefficient to correct a difference between lithium concentration distributions in the target electrode at a time of charging with a first electric current and at a time of charging with a second electric current greater than the first electric current based on a difference between electric potentials of a target electrode at the time of charging with the first electric current and at the time of charging with the second electric current, and an impedance of the target electrode at the time of charging with the second electric current.

Abstract: In an embodiment, an aging determination method of a battery as a target of determination is provided. With regard to a target electrode which is at least one of a positive electrode and a negative electrode of the battery, the method estimates a correction coefficient to correct a difference between lithium concentration distributions in the target electrode at a time of charging with a first electric current and at a time of charging with a second electric current greater than the first electric current based on a difference between electric potentials of a target electrode at the time of charging with the first electric current and at the time of charging with the second electric current, and an impedance of the target electrode at the time of charging with the second electric current.

Abstract: According to a storage battery of an embodiment includes a first battery module and a second battery module connected in parallel with the first battery module. The number of first cells connected in series in the first battery module is M, and the number of second cells connected in series in the second battery module is N. When an open circuit voltage at SOC=X % of the first cells and the second cells are Va1 (X) and Va2 (X), respectively, the voltages of the battery modules are M×Va1 (X)<N×Va2 (X) in the range where the SOC of the cell is 0% to 30%, and M×Va1 (X)>N×Va2 (X) in the range where the SOC of the cell is 70% to 100%.

Abstract: According to one embodiment, a storage battery includes one or more first batteries that include a first active material as a negative electrode active material, and one or more second batteries that include a second active material having an operation electric potential lower than that of the first active material as a negative electrode active material. Charge and the discharge of the second batteries are stopped based on a fact that a temperature of the storage battery is lower than a temperature threshold. The second batteries are caused to charge or discharge based on a fact that the temperature of the storage battery is equal to or higher than the temperature threshold.

Abstract: According to an embodiment, system includes transmitter, pump, controller, tank and thermal storage. Pump circulates water through the transmitter. Controller drives the pump, circulates the water while the transmitter is operating, and stops the circulation of the water at a time of a stop of the transmitter. Tank stores the water circulated through the transmitter, and supplies the water to the pump. Thermal storage is provided on a surface of the tank, and stores waste heat of the exothermic part of the transmitter, which was taken in the water via the tank. Thermal storage changes in phase if a temperature of the water in the tank lowers to a predetermined temperature or below, and heats the water by latent heat which occurs.

Abstract: A display apparatus has a wiring board connected to a first connection portion at an outer edge of a display. The number of first wires on a first surface of the wiring board is less than the number of second wires on a second surface. Through-holes adjacent to each other are disposed at positions that differ in the extending direction of the first wires.