Abstract: An excavator including a lower traveling body; an upper turning body turnably mounted to the lower traveling body; a work attachment attached to the upper turning body; an imaging device mounted to the upper turning body; a hydraulic actuator; a hydraulic pump configured to supply hydraulic oil to the hydraulic actuator; an electric motor configured to drive the hydraulic pump; an operation device of an electric type configured to operate the hydraulic actuator; and a control device configured to control the electric motor, wherein in response to determining that the operation device is not operated, the control device causes the hydraulic pump to automatically stop, and subsequently, in response to determining that an operation with respect to the operation device is started, the control device causes the hydraulic pump to be automatically activated.

Abstract: A disclosed shovel includes a hydraulic pump, a hydraulic actuator driven by hydraulic fluid supplied from the hydraulic pump, an electric motor configured to drive the hydraulic pump, a power storage device configured to be chargeable with power from an external power source to supply driving power to the electric motor, an input device configured to receive input from a user, an imaging device configured to acquire information about surroundings of the shovel, and a control device configured to set a target value of a charge amount of the power storage device, the power storage device being charged with power supplied from the external power source, in response to a predetermined input received by the input device.

Abstract: A shovel according to embodiments of the present invention includes: a lower traveling body; an upper swivel body that is rotatably mounted on the lower traveling body; an attachment that is configured by a boom, an arm, and an end attachment; an engine that is mounted on the upper swivel body; a motor generator that is able to assist the engine; a power storage system that is mounted on the upper swivel body; a swiveling motor that is driven by electric power from the motor generator and the power storage system; temperature detection units; and a control device. The control device switches a control mode in a case where at least one of a temperature relating to the motor generator, a temperature relating to the power storage system, and a temperature relating to the swiveling motor, detected by the temperature detection units, is higher than a predetermined temperature.

Abstract: An excavator includes a lower traveling body, an upper turning body turnably mounted on the lower traveling body, actuators configured to drive driven portions including the lower traveling body and the upper turning body, a power storage mounted on the upper turning body and used as an energy source for driving the actuators, a cooling circuit configured to cool the power storage, and a fan mounted on the upper turning body and configured to blow air to a radiator and a condenser for cooling the radiator and the condenser. Further, the power storage is arranged such that the power storage is apart from a path in which air outside the upper turning body, by an operation of the fan, is introduced into inside the upper turning body, passes across the heat exchanging device, and is discharged to the outside of the upper turning body.

Abstract: An excavator including a lower traveling body; an upper turning body turnably mounted to the lower traveling body; a work attachment attached to the upper turning body; an imaging device mounted to the upper turning body; a hydraulic actuator; a hydraulic pump configured to supply hydraulic oil to the hydraulic actuator; an electric motor configured to drive the hydraulic pump; an operation device of an electric type configured to operate the hydraulic actuator; and a control device configured to control the electric motor, wherein in response to determining that the operation device is not operated, the control device causes the hydraulic pump to automatically stop, and subsequently, in response to determining that an operation with respect to the operation device is started, the control device causes the hydraulic pump to be automatically activated.

Abstract: A shovel according to an embodiment of the present invention includes an engine; a motor generator that functions as a motor that uses a drive force of the engine and functions as a motor capable of assisting the engine; a power storage system, a swiveling motor; a DC bus that connects the motor generator, the power storage system, and the swiveling motor; and a controller that controls movements of the motor generator, the power storage system, and the swiveling motor. In a case where the power storage system is stopped, the controller supplies electric power of the motor generator that functions as the power generator to the swiveling motor when the swiveling motor is in a power running operation, and supplies regenerative electric power of the swiveling motor to the motor generator that functions as the motor when the swiveling motor is in a regenerative operation.

Abstract: A shovel according to embodiments of the present invention includes a lower travelling body, an upper swivel body, an operation attachment, an engine, a motor generator which is connected to the engine, a hydraulic pump which is connected to the motor generator and supplies hydraulic oil to the operation attachment, a swiveling electric motor which is mounted on the upper swivel body, a power storage device, a DC bus which electrically connects the power storage device and the swiveling electric motor to each other, and a control device, in which the control device decreases a charging/discharging limit value of the power storage device and changes a discharging requirement value which is the maximum value of power which is supplied from the power storage device to the swiveling electric motor, according to a decrease of temperature.

Abstract: A shovel includes an electrical power storage device that may be made of a plurality of electrical power storage cells for charging electricity generated by a generator; and an electrical power storage administration part that includes equalizing circuits each of which may be connected to corresponding one of the plurality of electrical power storage cells, an equalizing circuit defect determination part which determines whether a defect exists in the equalizing circuit, and a shutoff part which shuts off a connection between the equalizing circuit in which the defect may be determined to exist and the electrical power storage cell connected to the equalizing circuit.

Abstract: A shovel according to an embodiment of the present invention includes an upper swivel body, an engine, a motor generator which can assist the engine, a capacitor, a swiveling electric motor which swivels the upper swivel body, a DC bus which is connected to the motor generator, the capacitor, and the swiveling electric motor, and a controller which controls charging and discharging of the capacitor. In a case where a swiveling operation is performed, the controller drives the swiveling electric motor by discharging power discharged by the capacitor, and thereafter, drives the swiveling electric motor by power generated by the motor generator.

Abstract: A hydraulic shovel includes an engine; a hydraulic pump driven by the engine; an excavating attachment which is driven by high oil discharged from the hydraulic pump; a motor generator that assists a power supply of the engine; and an assist control unit that controls the motor generator to assist the engine in a latter part of the excavating operation by the excavating attachment.

Abstract: A shovel includes: an engine generating a drive power; a generator performing a generating operation using the drive power transmitted from the engine; an electric accumulator having a plurality of electric storage cells in which an electric power generated by the generator is accumulated, the electric accumulator supplying an electric power to an electric load of the shovel; and an equalizing circuit provided to each of the electric storage cells and including a discharge resistor and a switching circuit in order to equalize capacitances of the electric storage cells. A determination is made as to whether to activate the equalizing circuit based on a variation in outputs of the electric storage cells.

Abstract: A shovel according to embodiments of the present invention includes a lower travelling body, an upper swivel body, an operation attachment, an engine, a motor generator which is connected to the engine, a hydraulic pump which is connected to the motor generator and supplies hydraulic oil to the operation attachment, a swiveling electric motor which is mounted on the upper swivel body, a power storage device, a DC bus which electrically connects the power storage device and the swiveling electric motor to each other, and a control device, in which the control device decreases a charging/discharging limit value of the power storage device and changes a discharging requirement value which is the maximum value of power which is supplied from the power storage device to the swiveling electric motor, according to a decrease of temperature.

Abstract: A shovel according to embodiments of the present invention includes: a lower traveling body; an upper swivel body that is rotatably mounted on the lower traveling body; an attachment that is configured by a boom, an arm, and an end attachment; an engine that is mounted on the upper swivel body; a motor generator that is able to assist the engine; a power storage system that is mounted on the upper swivel body; a swiveling motor that is driven by electric power from the motor generator and the power storage system; temperature detection units; and a control device. The control device switches a control mode in a case where at least one of a temperature relating to the motor generator, a temperature relating to the power storage system, and a temperature relating to the swiveling motor, detected by the temperature detection units, is higher than a predetermined temperature.

Abstract: A shovel according to an embodiment of the present invention includes an upper swivel body, an engine, a motor generator which can assist the engine, a capacitor, a swiveling electric motor which swivels the upper swivel body, a DC bus which is connected to the motor generator, the capacitor, and the swiveling electric motor, and a controller which controls charging and discharging of the capacitor. In a case where a swiveling operation is performed, the controller drives the swiveling electric motor by discharging power discharged by the capacitor, and thereafter, drives the swiveling electric motor by power generated by the motor generator.

Abstract: A shovel according to an embodiment of the present invention includes an engine; a motor generator that functions as a motor that uses a drive force of the engine and functions as a motor capable of assisting the engine; a power storage system, a swiveling motor; a DC bus that connects the motor generator, the power storage system, and the swiveling motor; and a controller that controls movements of the motor generator, the power storage system, and the swiveling motor. In a case where the power storage system is stopped, the controller supplies electric power of the motor generator that functions as the power generator to the swiveling motor when the swiveling motor is in a power running operation, and supplies regenerative electric power of the swiveling motor to the motor generator that functions as the motor when the swiveling motor is in a regenerative operation.

Abstract: A storage module voltage equalizer includes a plurality of voltage equalization circuits that are prepared to correspond to a plurality of storage cells which are arranged to be lined up in a first direction, and equalize an inter-terminal voltage of the plurality of storage cells, and a plurality of mounting substrates that are stacked, in which the plurality of voltage equalization circuits are mounted, in a distributed manner, on the plurality of mounting substrates.

Abstract: A shovel includes a lower-part movable body, an upper-part turnable body turnably mounted on the lower-part movable body, a boom including a first end rotatably attached onto the upper-part turnable body, an arm including a first end rotatably attached to a second end of the boom, a work element rotatably attached to a second end of the arm, an electrical energy storage device including multiple electrical energy storage cells, and mounted on the upper-part turnable body, a controller configured to control the charge and discharge of the electrical energy storage device, and multiple voltage measurement parts configured to measure the respective cell voltages of the electrical energy storage cells. Information on the cell voltages is transmitted to the controller.

Abstract: A turning drive device is provided that converts power of an engine into electric power and turns a turning body using the converted electric power. The turning drive device includes an electrical energy storage unit that stores electrical energy, a turning motor that is driven by an electric power from the electrical energy storage unit and is configured to drive a turning body, an inverter that controls a drive operation of the turning motor, a controller that is connected to the inverter via a control signal line, and an emergency operation part that supplies a command to the inverter when an abnormality occurs in a control operation of the turning motor. The inverter blocks the control signal line based on a signal from the emergency operation part and controls the drive operation of the turning motor.

Abstract: A shovel includes an electrical power storage device that may be made of a plurality of electrical power storage cells for charging electricity generated by a generator; and an electrical power storage administration part that includes equalizing circuits each of which may be connected to corresponding one of the plurality of electrical power storage cells, an equalizing circuit defect determination part which determines whether a defect exists in the equalizing circuit, and a shutoff part which shuts off a connection between the equalizing circuit in which the defect may be determined to exist and the electrical power storage cell connected to the equalizing circuit.

Abstract: A construction machine with improved safety can include a high voltage cable for supplying power. The high voltage cable connects a storage devices to an electric drive that drives using power from a power generation device, which generates power using the drive of an engine, or from the storage device, which stores the power generated by the power generation device, is wired along the sides of a frame structural member that protrudes in a vertical direction. The frame structural member serves as an upright wall to adequately protect the high voltage cable. In cases in which, for example, the construction machine strikes an obstruction, or the like, the high voltage cable is adequately protected by the frame structural member.