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.

Abstract: Each of the plurality of battery heat radiation units includes, a battery module, at least one heat pipe thermally connected at a first end of the heat pipe to one surface of the battery module and protruding from the battery module at a second end of the heat pipe, at least one metal heat exchanger plate thermally connected to one surface of the battery module, and at least one heat radiation portion provided at the second end of the heat pipe, the air blowing portion blows air to the heat radiation portion, and one heat radiation portion in the plurality of battery heat radiation units is misaligned with other heat radiation portions in the plurality of battery heat radiation units as viewed from the air blowing portion side.

Abstract: A vapor separator in an embodiment is arranged between a first space and a second space, and is used to allow vapor existing in the first space to permeate the second space by making a vapor pressure in the second space lower than a vapor pressure in the first space. The vapor separator in the embodiment includes: a porous body having a first face, a second face opposite to the first face, and fine pores passing from the first face to the second face; and a soluble absorbent existing in the fine pores of the porous body.

Abstract: According to one embodiment, an electrochemical cell includes an anode, a cathode and an electrolytic membrane interposed therebetween. At least one of the anode and the cathode is formed of an integral solid conductive plate and includes a first surface in contact with the electrolytic membrane and a second surface apart from the first surface in a thickness direction. The at least one of the anode and the cathode includes a plurality of first pores opened in the first surface and a plurality of second pores opened in the second surface, the second pores communicating with a part of the first pores. The first pores are smaller than the second pores, and the concentration of pores in the first surface is higher than that in the second surface.

Abstract: A heat exchanger according to an embodiment includes an air supply path through which supply air supplied to a target space from the outside of the target space passes; an exhaust path through which exhaust air discharged from the target space to the outside of the target space passes; a partition member that divides the air supply path and the exhaust path and performs heat exchange between the supply air and the exhaust air; a separation member that adsorbs moisture in the air or discharges the adsorbed moisture to the air; and a decompression path that is provided at the air supply path side, is divided from the air supply path by the separation member, and is connected to a decompression pump.

Abstract: An image forming apparatus according to an embodiment includes, a fixing roller including a heat generation source, supplying heat to a printing object, and fixing toner on the printing object, an opposing roller opposed to the fixing roller to hold the printing object between the opposing roller and the fixing roller, a heat exchange roller containing a heat storage material capable of changing in between a liquid and a solid phase, a sensor capable of sensing a temperature of the fixing roller; and a driving unit causing the heat exchange roller to abut against the fixing roller and separating the heat exchange roller from the fixing roller, in accordance with the temperature of the fixing roller sensed by the sensor.

Abstract: A vapor separator in an embodiment is arranged between a first space and a second space, and is used to allow vapor existing in the first space to permeate the second space by making a vapor pressure in the second space lower than a vapor pressure in the first space. The vapor separator in the embodiment includes: a porous body having a first face, a second face opposite to the first face, and fine pores passing from the first face to the second face; and a soluble absorbent existing in the fine pores of the porous body.

Abstract: According to one embodiment, an electrochemical cell includes an anode, a cathode and an electrolytic membrane interposed therebetween. At least one of the anode and the cathode is formed of an integral solid conductive plate and includes a first surface in contact with the electrolytic membrane and a second surface apart from the first surface in a thickness direction. The at least one of the anode and the cathode includes a plurality of first pores opened in the first surface and a plurality of second pores opened in the second surface, the second pores communicating with a part of the first pores. The first pores are smaller than the second pores, and the concentration of pores in the first surface is higher than that in the second surface.

Abstract: According to one embodiment, a fixing device includes a cylinder-shaped rotatable fixing belt and a pressurizing rotating member which is arranged so as to face the fixing belt along an axial direction, and transports a recording medium by rotating along with the fixing belt. In addition, arranged in the fixing belt, a pressurizing member which presses the fixing belt from an inner peripheral portion toward the pressurizing rotating member side, and a support member which supports the pressurizing member, and arranged a moisture absorbing layer which absorbs moisture in air and discharges the absorbed moisture according to a temperature rise between the support member and the pressurizing member.

Abstract: A water collecting system of an embodiment has a water supplying unit with a water-permeable membrane, a first chamber and a second chamber separated from the first chamber by the permeable membrane, a vacuum unit, a water collecting unit collecting liquid water, a first switching valve, a cooling unit cooling the water collecting unit; and an air blowing unit sending first gas to the first chamber. The second chamber, the vacuum unit, the water collecting unit, and the first switching valve comprise a first loop circuit in which second gas flow. The vacuum unit decompresses the second gas flowing in the first loop circuit and reduces a pressure in the second gas in comparison with a pressure in the first gas. The cooling unit collects the liquid water by cooling the second gas passing through the water collecting unit and condensing gaseous water included in the second gas.

Abstract: Each of the plurality of battery heat radiation units includes, a battery module, at least one heat pipe thermally connected at a first end of the heat pipe to one surface of the battery module and protruding from the battery module at a second end of the heat pipe, at least one metal heat exchanger plate thermally connected to one surface of the battery module, and at least one heat radiation portion provided at the second end of the heat pipe, the air blowing portion blows air to the heat radiation portion, and one heat radiation portion in the plurality of battery heat radiation units is misaligned with other heat radiation portions in the plurality of battery heat radiation units as viewed from the air blowing portion side.