Abstract: A hybrid aircraft that flies by using a plurality of rotors (takeoff and landing rotors and cruise rotors) includes a generator, a battery charged with power generated by the generator, a plurality of electric motors that rotate the respective rotors by the power generated by the generator and power supplied from the battery, and a controller that sets a target remaining capacity of the battery according to a flight state of the aircraft and controls charging and discharging of the battery so that the remaining capacity of the battery approaches the target remaining capacity.

Abstract: A battery device includes a lead tab electrically connected to a positive electrode tab provided for a first battery cell among a plurality of battery cells and a negative electrode tab provided for a second battery cell adjacent to the first battery cell among the plurality of battery cells, and a lead tab electrically connected to a positive electrode tab provided for a third battery cell among the plurality of battery cells and a negative electrode tab provided for a fourth battery cell adjacent to the third battery cell among the plurality of battery cells, wherein the lead tabs are adjacent to each other in the Y direction.

Abstract: A battery device including a plurality of battery cells stacked in the X direction, a first tab connection portion, and the second tab connection portion, the first tab connection portion connecting a positive electrode tab of a first battery cell and a negative electrode tab of a second battery cell with each other, and the second tab connection portion connecting a positive electrode tab of a third battery cell and a negative electrode tab of a fourth battery cell with each other, wherein the first tab connection portion and the second tab connection portion are adjacent to each other in the Y direction.

Abstract: A battery unit includes: a battery module row formed of four battery modules; and a junction box. The junction box includes a first terminal connected to a first battery module which is a battery module positioned at an end of the battery module row, and a second terminal connected to a second battery module adjacent to the first battery module.

Abstract: A method of evaluating an all-solid-state battery includes preparing the all-solid-state battery. A charge level of the all-solid-state battery is adjusted to produce a first potential difference between a positive electrode and a negative electrode. The positive electrode or the negative electrode is selected as a reference electrode. After the charge level is adjusted, an operation to insert a conductive rod-shaped member into a stack portion along a direction of stack of the positive electrode and the negative electrode is performed while a second potential difference between the reference electrode and the rod-shaped member is measured. The rod-shaped member is stopped. The all-solid-state battery is evaluated based on a state of the all-solid-state battery after the rod-shaped member is stopped.

Abstract: In a battery pack, a housing includes an exhaust portion provided on an upper side in a gravity direction with respect to a housing portion that houses a live part. The exhaust portion includes: a storage portion configured to store a liquid; a first communication portion that communicates between an interior of the housing portion and an interior of the exhaust portion; and a second communication portion that communicates between an outside of a housing and an inside of the exhaust portion. When the battery pack is viewed from the upper side in the gravity direction, an opening of the second communication portion on an inner side of the exhaust portion is provided at a position that overlaps the storage portion and that does not overlap an opening of the first communication portion on the inner side of the exhaust portion.

Abstract: Before power is supplied to a load from a capacitor and a plurality of batteries, a battery for initially supplying power for charging to the capacitor is determined from among the plurality of batteries, based on a result of acquiring the voltage of each battery, and voltage equalization of the plurality of batteries is performed in response to power for charging being supplied to the capacitor from the determined battery.

Abstract: A charge status control system 99 includes: a power generator 40a configured to generate electrical power and to supply it to a load; a battery 32 configured to store the electrical power generated by the power generator 40a and to supply the stored electrical power to the load; an ECU 33 configured to detect a state of charge of the battery 32; and a control unit 91 configured to, if a detection result of a remaining charge amount of the battery 32 by the ECU 33 is a storage threshold or more, control the state of charge of the battery 32 by discharging the electrical power stored in the battery 32 to an external power source 111. According to this, the remaining charge amount of the battery 32 can be maintained to approximately the storage threshold or less to suppress the progression of the deterioration of the battery 32.

Abstract: A control system 70 includes: a VTOL rotor 20 and a cruise rotor 29 configured to generate a thrust; a power unit that has a power generation device 40a configured to generate power and supply the power to the rotors, and a battery 32 configured to store power which is supplied from the power generation device, and supply stored power to the rotors; and a control unit 91 configured to calculate a charging time of the battery based on a required amount of power storage that should be stored in the battery when the aircraft flies in a predetermined flight condition, and a state of the battery, and determine a charge start time of the battery based on the charging time and a flight time it takes to reach the predetermined flight condition. With this, it is possible to suppress a deterioration.

Abstract: To control charging of a battery without applying an overload by power feed of a generator based on a state of charge of the battery. A charge control system includes an engine and a motor generator for supplying generated power to two motors of a VTOL rotor and a cruising rotor, a plurality of batteries including two batteries for storing the electrical power generated by the generator and supply the stored electrical power to each of the two motors, a switch for connecting or disconnecting each of the batteries to or from the generator, and a control section for controlling the switch based on a state of charge of each of the batteries to disconnect one battery with a larger charge amount out of the two batteries from the generator and connect the other battery with the smaller charge amount out of the two batteries to the generator.

Abstract: An intermediate wall is provided with a return oil hole through which oil discharged from a friction engagement device returns toward an oil reservoir. A chain drive is disposed adjacent to the intermediate wall. The chain drive transmits a driving force from an input member and/or a rotary electric machine to an oil pump. There is provided an oil guide through which oil flowing through the return oil hole is guided to a region other than a chain placement region inside a case. The chain placement region is a region where a chain of the chain drive is placed.

Abstract: A method of evaluating a power storage device includes at least [a] to [f] below. [a] A power storage device is prepared. [b] A charge level of the power storage device is adjusted to produce a first potential difference between a positive electrode and a negative electrode. [c] The positive electrode or the negative electrode is selected as a reference electrode. [d] After the charge level is adjusted, an operation to insert a conductive rod-shaped member into a stack portion along a direction of stack of the positive electrode and the negative electrode is performed while a second potential difference between the reference electrode and the rod-shaped member is measured. [e] The rod-shaped member is stopped. [f] The power storage device is evaluated based on a state of the power storage device after the rod-shaped member is stopped.

Abstract: A battery frame includes a pair of flat spring plates, a pair of pressing plates, and connecting members connecting the pair of flat spring plates. Each of the flat spring plates includes first regions and a second region. The second region is located inward of the first regions in the stacking direction of a battery cell stack. The connecting members are attached to the flat spring plates via the first regions, and the pressing plates are attached to the flat spring plates via the second regions.

Abstract: In a battery cell connection structure for connecting two rectangular battery cells in series in a state where the two battery cells are stacked in the thickness direction thereof, a positive electrode tab of one of the battery cells and a negative electrode tab of the other of the battery cells are connected to each other in a state where the positive electrode tab and the negative electrode tab are stacked in the thickness direction while the positive electrode tab and the negative electrode tab are inclined with respect to a direction in which the two battery cells are stacked.

Abstract: A heat exchanger for cooling battery cells includes a plurality of first heat exchange plates each including a first water jacket, and a plurality of second heat exchange plates each including a second water jacket. A second water supply inlet is disposed on the opposite side of the first water jacket and the second water jacket from a first water supply inlet in the flow direction, and a second water discharge outlet is disposed on the opposite side of the first water jacket and the second water jacket from a first water discharge outlet in the flow direction.

Abstract: A method of evaluating a power storage device includes at least [a] to [f] below. [a] A power storage device is prepared. [b] A charge level of the power storage device is adjusted to produce a first potential difference between a positive electrode and a negative electrode. [c] The positive electrode or the negative electrode is selected as a reference electrode. [d] After the charge level is adjusted, an operation to insert a conductive rod-shaped member into a stack portion along a direction of stack of the positive electrode and the negative electrode is performed while a second potential difference between the reference electrode and the rod-shaped member is measured. [e] The rod-shaped member is stopped. [f] The power storage device is evaluated based on a state of the power storage device after the rod-shaped member is stopped.

Abstract: A hybrid aircraft that flies by using a plurality of rotors (takeoff and landing rotors and cruise rotors) includes a generator, a battery charged with power generated by the generator, a plurality of electric motors that rotate the respective rotors by the power generated by the generator and power supplied from the battery, and a controller that sets a target remaining capacity of the battery according to a flight state of the aircraft and controls charging and discharging of the battery so that the remaining capacity of the battery approaches the target remaining capacity.

Abstract: Before power is supplied to a load from a capacitor and a plurality of batteries, a battery for initially supplying power for charging to the capacitor is determined from among the plurality of batteries, based on a result of acquiring the voltage of each battery, and voltage equalization of the plurality of batteries is performed in response to power for charging being supplied to the capacitor from the determined battery.

Abstract: In a battery pack, a housing includes an exhaust portion provided on an upper side in a gravity direction with respect to a housing portion that houses a live part. The exhaust portion includes: a storage portion configured to store a liquid; a first communication portion that communicates between an interior of the housing portion and an interior of the exhaust portion; and a second communication portion that communicates between an outside of a housing and an inside of the exhaust portion. When the battery pack is viewed from the upper side in the gravity direction, an opening of the second communication portion on an inner side of the exhaust portion is provided at a position that overlaps the storage portion and that does not overlap an opening of the first communication portion on the inner side of the exhaust portion.

Abstract: A battery module includes a plurality of battery cells connected in series. Each of the battery cells has a rectangular thin plate shape, and includes a thin plate-shaped positive electrode tab and a thin plate-shaped negative electrode tab, which are provided on one side of the battery cell. Among the battery cells, the side of one battery cell where the positive electrode tab and the negative electrode tab are provided and the side of another battery cell where the positive electrode tab and the negative electrode tab are provided, are arranged so as to face each other. The positive electrode tab of the one battery cell and the negative electrode tab of the other battery cell are overlapped with each other in a thickness direction of the battery cells and in contact with each other.