Abstract: A working machine includes an electric motor, a working device driven by power of the electric motor, an operation device to operate the working device, an operation locker switchable between an enabling position at which an operation of the working device by the operation device is enabled and a disabling position at which the operation is disabled, a cooler including an electric cooling fan, a temperature detector to detect a cooling target temperature, which is the temperature of a cooling target to be cooled by the cooler, and a controller to control a fan rotational speed, which is the rotational speed of the cooling fan, in accordance with the cooling target temperature detected by the temperature detector. The controller changes a characteristic of the fan rotational speed with respect to the cooling target temperature depending on whether the operation locker is in the enabling position or in the disabling position.

Abstract: An electric working machine includes an electric device, battery packs, and a controller. The electric circuitry includes external relays corresponding to the respective battery packs. The controller is configured or programmed to perform an external relay test process to examine whether contacts of a corresponding external relay which corresponds to a second battery pack to be connected to second or later are locked, and, in the external relay test process, if a voltage between the positive and negative external terminals of the battery pack is equal to or more than a threshold, determine that the contacts of the external relay are locked, and, if the voltage between the positive and negative external terminals of the battery pack is less than the threshold, determine that the contacts of the external relay are normal.

Abstract: An electric working machine includes an electric device, electric circuitry electrically connected to the electric device, battery packs to be connected to the electric device via the electric circuitry, and a controller. The controller is configured or programmed to, in a driving mode, if a voltage difference between the battery packs is greater than a predetermined reference, connect one of the battery packs having a highest voltage to the electric device to drive the electric device.

Abstract: An electric working machine includes an electric device, electric circuitry, battery packs to be connected sequentially to the electric device such that they are connected in parallel, and a controller. The electric circuitry includes external relays corresponding to the respective battery packs. The controller is configured or programmed to specify each battery pack as being a battery pack requiring a test process to examine opening and closing actions of internal relay(s) of the battery pack or a battery pack not requiring the test process, and in connecting the battery packs to the electric device, perform the test process on battery pack(s) that have been specified as requiring the test process to examine the opening and closing actions, and not perform the test process on battery pack(s) that have been specified as not requiring the test process to examine the opening and closing actions.

Abstract: An electric working machine includes an electric device, electric circuitry, battery packs to be connected sequentially to the electric device via the electric circuitry to parallelly connected, the battery packs including internal relay(s) to open/close an internal circuit, and a controller. The electric circuitry includes external relays corresponding to respective battery packs. The controller is configured or programmed to perform a first latter process wherein, while a first battery pack to be connected first to the electric device is in electrical connection with the electric device, the controller brings the internal relay(s) of a second battery pack to be connected second or later to the electric device into a closed state, and a second latter process wherein the controller brings, into the closed state, the external relay corresponding to the second battery pack where the internal relay(s) is in the closed state.

Abstract: An electric work vehicle includes an electric motor to drive a vehicle body to travel, a first battery chargeable by an external power supply to supply driving electric power to the electric motor, a second battery that is rechargeable to supply electric power to an electric component installed in the vehicle body, a voltage converter to supply electric power while adjusting a voltage value between the first and second batteries, and a controller to which electric power is supplied from the second battery and configured or programmed to control a charge state during charging by the power supply and to control operation of the voltage converter. The control is configured or programmed to execute an interval charging process repeatedly at set time intervals to control operation of the voltage converter to charge the second battery using electric power supplied from the first battery.

Abstract: An electric work vehicle includes an electric motor to drive a vehicle body to travel, a battery chargeable by an external power supply to supply driving electric power to the electric motor, a connection section to which a power supply connector of the power supply is connectable, a controller configured or programmed to control a charge state during charging by the power supply, and a temperature detector to detect a temperature of the battery. The controller is configured or programmed to execute a temperature increase control to warm the battery until the temperature of the battery increases to a target temperature prior to charging the battery, in response to the temperature of the battery detected by the temperature detector being not higher than a set temperature.

Abstract: An electric work vehicle includes a battery, a motor to be driven by electric power supplied from the battery, a travel device to be driven by the motor, and a connector to which a charger is connectable and is electrically connected to the battery. The connector includes a connection terminal to which the charger is connectable and a housing that covers the connection terminal, and the housing includes a first drain hole in a lower portion thereof.

Abstract: An electric work vehicle includes a travel motor provided on a traveling body, a battery provided at a front portion of the traveling body to supply electric power to the motor, a cable to extract electric power from the battery, and a cover to cover the battery and the cable. The cable extends from a front portion of the battery.

Abstract: An electric work vehicle includes a battery, an inverter to convert output from the battery to AC power, a motor drivable by the converted AC power, a travel device drivable by the motor, a controller configured or programmed to control a current flowing through the motor by operating the inverter in accordance with rotational speed information indicative of a rotational speed of the motor and a required rotational speed for the motor, a DC/DC converter to convert an output voltage of the battery to a voltage applicable to the controller, and a current limiter to limit the current flowing through the motor when a temperature of the inverter is higher than a predetermined temperature. The controller is configured or programmed to limit the current flowing through the motor when at least one temperature of the inverter, the motor, or the DC/DC converter is higher than a predetermined temperature.

Abstract: An electric work vehicle includes a battery in a machine body, an inverter to convert DC power output from the battery to AC power, a motor drivable by the AC power converted by the inverter, a rotational speed detector to obtain rotational speed information of the motor, a travel device drivable by the motor, an operator to change a required rotational speed of the motor, a storage to store an output map defining a relationship between a torque value and the rotational speed of the motor, and a controller to control a current flowing through the motor by operating the inverter based on the rotational speed information, the required rotational speed, and the output map. The output map has a shape similar to that of a torque curve of an engine in a high rotation range where the rotational speed of the motor is at least a predetermined rotational speed.

Abstract: A working machine includes a machine body, an engine on the machine body, a motor/generator to perform an assisting action in which the motor/generator functions as a motor to assist the engine in driving and an electricity generating action in which the motor/generator functions as a generator to generate electricity using power from the engine, a working device to function using power from the engine and the motor/generator, a work operation actuator for operation of the working device, an action controller to cause the assisting action to be performed when a rotation speed of the engine is equal to or less than a first rotation speed and cause the electricity generating action to be performed when the rotation speed of the engine is equal to or greater than a second rotation speed greater than the first rotation speed, and a speed controller to change the first rotation speed or the second rotation speed according to an operation amount of the work operation actuator.

Abstract: An electric working machine includes battery packs, an actuated device to be actuated by electricity supplied from the battery packs, and a controller to control discharging of the battery packs based on remaining charge levels of the battery packs. The controller is configured/programmed to select one of the battery packs as a discharging battery pack, and perform a limiting process to limit electricity supplied from the discharging battery pack to the actuated device when the remaining charge level of the discharging battery pack is less than a limit threshold, and cause the limit threshold and/or content of the limiting process to differ between when one or more of the battery packs that are other than the discharging battery pack have a remaining charge level of a second threshold or more and when any of such battery packs do not have a remaining charge level of the second threshold or more.

Abstract: A working machine includes a machine body, an engine on the machine body, a motor/generator to perform an assisting action in which the motor/generator functions as a motor to assist the engine in driving and an electricity generating action in which the motor/generator functions as a generator to generate electricity using power from the engine, a battery to store electricity generated by the motor/generator, an operation actuator to perform an operation of the machine body, a starting action determiner to determine, upon operation of the operation actuator, whether the operation corresponds to a starting action for the machine body, a first setter to set, if the starting action determiner determines that the operation of the operation actuator corresponds to the starting action, a torque of the motor/generator for the assisting action or the electricity generating action to a first torque, and a second setter to set, if the starting action determiner determines that the operation of the operation actuator d

Abstract: A power supply includes a battery; an inverter that controls an output voltage of the battery; an air-cooler that cools the battery and the inverter with cooling air; and a case that houses the battery, the inverter, and the air-cooler.

Abstract: A working machine includes a machine body, an engine on the machine body, a motor/generator to perform an assisting action in which the motor/generator functions as a motor to assist the engine in driving and an electricity generating action in which the motor/generator functions as a generator to generate electricity using power from the engine, a working device to function using power from the engine and the motor/generator, a work operation actuator for operation of the working device, an action controller to cause the assisting action to be performed when a rotation speed of the engine is equal to or less than a first rotation speed and cause the electricity generating action to be performed when the rotation speed of the engine is equal to or greater than a second rotation speed greater than the first rotation speed, and a speed controller to change the first rotation speed or the second rotation speed according to an operation amount of the work operation actuator.

Abstract: A working machine includes a machine body, an engine on the machine body, a motor/generator to perform an assisting action in which the motor/generator functions as a motor to assist the engine in driving and an electricity generating action in which the motor/generator functions as a generator to generate electricity using power from the engine, a battery to store electricity generated by the motor/generator, an operation actuator to perform an operation of the machine body, a starting action determiner to determine, upon operation of the operation actuator, whether the operation corresponds to a starting action for the machine body, a first setter to set, if the starting action determiner determines that the operation of the operation actuator corresponds to the starting action, a torque of the motor/generator for the assisting action or the electricity generating action to a first torque, and a second setter to set, if the starting action determiner determines that the operation of the operation actuator d

Abstract: The working machine includes a machine body, an engine provided on the machine body, a motor generator to be operated as a motor to assist driving of the engine in an assisting operation and to be operated as a generator by power of the engine to generate electricity in a generating operation, a battery to store the electricity generated by the motor generator, an acceleration sensor to measure acceleration of the machine body, and a controller to selectively set either one of the assisting operation and the generating operation based on the acceleration of the machine body measured by the acceleration sensor.