Abstract: A control device of an electric hydraulic excavator sets or computes a rotation speed command and an allowable torque of an electric motor on the basis of a required rotation speed of the electric motor, and a sum of a suppliable electric power of a converter and a battery suppliable electric power. An inverter of the electric hydraulic excavator sets the allowable torque to a torque command if a calculated torque of the electric motor computed by multiplying by a gain, a difference between the rotation speed command and a rotation speed of the electric motor, exceeds the allowable torque, and sets the calculated torque to the torque command if the calculated torque does not exceed the allowable torque. The inverter supplies the electric power that can generate a torque corresponding to the torque command to the electric motor.

Abstract: A hanging plate adapted to be attached to a working machine body and used to hang the working machine body by hooking a hook is provided. The hanging plate includes at least one elongated hole that penetrates the hanging plate in a thickness direction thereof and allows the insertion of an end portion of the hook. In the elongated hole, an opening area on a side closer to the working machine body is larger than an opening area on a side farther from the working machine body with an orthogonal line as a boundary. The orthogonal line passes through a midpoint of a longest line segment having a maximum length among line segments each connecting two points on a peripheral edge that defines an opening of the elongated hole, and it is orthogonal to the longest line segment.

Abstract: A working machine is provided. The working machine includes a working machine body, a hanging plate adapted to be attached to the working machine body and used to hang the working machine body by hooking a hook, and a marker. The hanging plate includes a plurality of holes that penetrates the hanging plate in a thickness direction thereof and allows the insertion of an end portion of the hook. The marker has a function of indicating a position of a specific hole among the plurality of holes.

Abstract: A battery diagnosis system includes a controller that obtains operation data of a power storage device including a plurality of secondary battery cells, computes a battery state value on the basis of the obtained operation data, and diagnoses a state of the power storage device on the basis of the computed battery state value, and an output device that outputs a result of the diagnosis of the power storage device performed by the controller. The operation data includes a minimum value and a maximum value of cell voltages of the plurality of secondary battery cells constituting the power storage device. The controller computes a minimum cell capacity or a maximum cell resistance as the battery state value on the basis of the minimum value of the cell voltages measured when a charge/discharge state of the power storage device is a first state and the maximum value of the cell voltages measured when the charge/discharge state of the power storage device is a second state.

Abstract: A control device of an electric hydraulic excavator sets or computes a rotation speed command and an allowable torque of an electric motor on the basis of a required rotation speed of the electric motor, and a sum of a suppliable electric power of a converter and a battery suppliable electric power. An inverter of the electric hydraulic excavator sets the allowable torque to a torque command if a calculated torque of the electric motor computed by multiplying by a gain, a difference between the rotation speed command and a rotation speed of the electric motor, exceeds the allowable torque, and sets the calculated torque to the torque command if the calculated torque does not exceed the allowable torque. The inverter supplies the electric power that can generate a torque corresponding to the torque command to the electric motor.

Abstract: A management server receives a maximum value and a minimum value of the respective voltages in a plurality of battery cells configuring an electricity storage device of a hydraulic excavator from the hydraulic excavator, and stores the values in a storage device. Discharge characteristics of the electricity storage device are stored in the storage device in the management server. A battery state estimation calculating unit in the management server calculates an estimation maximum value and an estimation minimum value of cell voltages in the present or in the future by adding the discharge characteristics stored in the storage device to the latest maximum value and the latest minimum value of the cell voltages stored in the storage device. A management information producing unit outputs information based upon the estimation maximum value and the estimation minimum value of the cell voltages calculated in the battery state estimation calculating unit.

Abstract: In a case of a normal operation, a battery controller (22) assumes a normal operation mode and permits charging and discharging of a battery module (21). Upon receiving a discharge command from a vehicle body controller (17) for completely discharging the battery module (21), the battery controller (22) assumes a discharge mode to discharge the battery module (21) to reach a safe voltage level and store discharge information. Upon reading out the discharge information, the battery controller (22) assumes a discharge prohibition mode to prohibit charging and discharging of the battery module (21).

Abstract: A battery excavator 1 as an electric powered working machine includes a secondary battery 201, a battery management unit 202 that manages the secondary battery 201, and a controller 300 that controls a normal charge or a diagnostic charge for the secondary battery 201. The controller 300 includes: a diagnostic charge recommendation determination unit 301 that determines whether to recommend the diagnostic charge or not based on an operation history of the secondary battery output from the battery management unit 202; and a diagnostic charge execution determination unit 302 that determines whether to execute the diagnostic charge or not based on a state of the secondary battery output from the battery management unit 202, an estimated charge period necessary for the diagnostic charge, and a site work plan including a work start time, when the diagnostic charge is determined to be recommended.

Abstract: In a case of a normal operation, a battery controller (22) assumes a normal operation mode and permits charging and discharging of a battery module (21). Upon receiving a discharge command from a vehicle body controller (17) for completely discharging the battery module (21), the battery controller (22) assumes a discharge mode to discharge the battery module (21) to reach a safe voltage level and store discharge information. Upon reading out the discharge information, the battery controller (22) assumes a discharge prohibition mode to prohibit charging and discharging of the battery module (21).

Abstract: A relay (25) connects and disconnects an electrical circuit to which an inverter (16) and an electricity storage device (19) are connected. A BCU (22) controls the electricity storage device (19). An HC (27) controls an electric motor (15), the inverter (16) and the BCU (22). The HC (27) and the BCU (22) respectively have FET switches (30, 31) for controlling supply and stop of the excitation current in the relay (25). When the electricity storage device (19) is determined to be in an abnormal state, the BCU (22) transmits an abnormal signal to the HC (27), and when a predetermined time has elapsed, turns off (opens) the first FET switch (30) of the BCU (22). The HC (27) executes stop processing based upon the abnormal signal received from the BCU (22) and then turns off (opens) the second FET switch (31) of the HC (27).

Abstract: A main controller and a hybrid controller control an engine, an assist generator motor, a hydraulic pump and an electricity storage device. In this case, the hybrid controller is provided with a performance state recovery part that performs performance state recovery of the electricity storage device. In a case where a performance state amount varying with repetition of a discharge and a charge of the electricity storage device, specifically, a current integrated value ratio of the electricity storage device goes beyond a predetermined threshold value (L1%), the performance state recovery part limits power of the hydraulic pump. Thereby, the performance state recovery part performs the performance state recovery of the electricity storage device.

Abstract: An engine cooling system (22) includes an engine (11), an engine cooling pipe line (23), an engine water pump (24) and an engine radiator (25). An electricity storage device cooling system (27) includes an electricity storage device (19), an electricity storage device cooling pipe line (28), an electricity storage device water pump (29) and an electricity storage device radiator (31). Different heat-transfer media (engine cooling water and electricity storage device cooling water) flow respectively in the engine cooling system (22) and the electricity storage device cooling system (27). Further, a heating heat exchanger (32) is provided in the halfway of the engine cooling pipe line (23) and in the halfway of the electricity storage device cooling pipe line (28) for performing heat exchange between the engine cooling water and the electricity storage device cooling water.

Abstract: A storage battery (21) is configured of a plurality of cells (22A) to (22N) series-connected to each other. A battery controller (27) receives power supplied from a lead battery (31). The battery controller (27) executes balancing control that reduces variation in cell voltages (VcA) to (VcN) of the plurality of cells (22A) to (22N). The battery controller (27) executes the balancing control in a time range during which a voltage of the lead battery (31) becomes equal to or more than a predetermined given voltage value (V1) and a charging rate of the storage battery (21) becomes equal to or more than a predetermined given charging rate value (SOC1) after a key switch (16) is switched from an on state to an off state.

Abstract: A main controller and a hybrid controller control an engine, an assist generator motor, a hydraulic pump and an electricity storage device. In this case, the hybrid controller is provided with a performance state recovery part that performs performance state recovery of the electricity storage device. In a case where a performance state amount varying with repetition of a discharge and a charge of the electricity storage device, specifically, a current integrated value ratio of the electricity storage device goes beyond a predetermined threshold value (L1%), the performance state recovery part limits power of the hydraulic pump. Thereby, the performance state recovery part performs the performance state recovery of the electricity storage device.

Abstract: An engine cooling system (22) includes an engine (11), an engine cooling pipe line (23), an engine water pump (24) and an engine radiator (25). An electricity storage device cooling system (27) includes an electricity storage device (19), an electricity storage device cooling pipe line (28), an electricity storage device water pump (29) and an electricity storage device radiator (31). Different heat-transfer media (engine cooling water and electricity storage device cooling water) flow respectively in the engine cooling system (22) and the electricity storage device cooling system (27). Further, a heating heat exchanger (32) is provided in the halfway of the engine cooling pipe line (23) and in the halfway of the electricity storage device cooling pipe line (28) for performing heat exchange between the engine cooling water and the electricity storage device cooling water.

Abstract: A management server (52) receives a maximum value and a minimum value of the respective voltages (cell voltages) in a plurality of battery cells (19A, 19A) configuring an electricity storage device (19) of a hydraulic excavator (1) from the hydraulic excavator (1), and stores the maximum value and the minimum value in a storage device (52A). Discharge characteristics of the electricity storage device (19) are stored in the storage device (52A) in the management server (52). A battery state estimation calculating unit (52D) in the management server (52) calculates an estimation maximum value and an estimation minimum value of cell voltages in the present or in the future by adding the discharge characteristics stored in the storage device (52A) to the latest maximum value and the latest minimum value of the cell voltages stored in the storage device (52A).

Abstract: A storage battery (21) is configured of a plurality of cells (22A) to (22N) series-connected to each other. A battery controller (27) receives power supplied from a lead battery (31). The battery controller (27) executes balancing control that reduces variation in cell voltages (VcA) to (VcN) of the plurality of cells (22A) to (22N). The battery controller (27) executes the balancing control in a time range during which a voltage of the lead battery (31) becomes equal to or more than a predetermined given voltage value (V1) and a charging rate of the storage battery (21) becomes equal to or more than a predetermined given charging rate value (SOC1) after a key switch (16) is switched from an on state to an off state.

Abstract: A relay (25) connects and disconnects an electrical circuit to which an inverter (16) and an electricity storage device (19) are connected. A BCU (22) controls the electricity storage device (19). An HC (27) controls an electric motor (15), the inverter (16) and the BCU (22). The HC (27) and the BCU (22) respectively have FET switches (30, 31) for controlling supply and stop of the excitation current in the relay (25). When the electricity storage device (19) is determined to be in an abnormal state, the BCU (22) transmits an abnormal signal to the HC (27), and when a predetermined time has elapsed, turns off (opens) the first FET switch (30) of the BCU (22). The HC (27) executes stop processing based upon the abnormal signal received from the BCU (22) and then turns off (opens) the second FET switch (31) of the HC (27).

Abstract: Hybrid construction machinery has a power storage apparatus that can be warmed up quickly and has a lengthened life. The machinery includes an electric motor assisting a prime mover in power and generating electric power. The power storage apparatus transfers electric power to and from the electric motor. A warm-up circuit circulates a warming medium in the vicinity of the power storage apparatus, and a control device controls circulation of the warming medium. On-board equipment state detection units detect on-board equipment states to estimate an output request for the power storage apparatus from the on-board equipment. Circulation of the warming medium is controlled based on a temperature of the power storage apparatus and a determination temperature for determining whether to circulate the warming medium in the warm-up circuit. The control device further varies the determination temperature according to a result of detection by the on-board equipment state detection units.

Abstract: A motor generator (27) is connected mechanically to an engine (21) and a hydraulic pump (23). The hydraulic pump (23) delivers pressurized oil to cylinders (11D) to (11F) in a working mechanism (11), a traveling hydraulic motor (25) and a revolving hydraulic motor (26). The revolving hydraulic motor (26) drives a revolving device (3) in cooperation with a revolving electric motor (33). The motor generator (27) and the revolving electric motor (33) are connected electrically to an electricity storage device (31). An HCU (36) sets a target electricity storage rate (SOC0) of the electricity storage device (31) and a pump output limit (POL0) of the hydraulic pump (23) corresponding to a mode selected by a mode selection device (38). The HCU (36) controls the engine (21), the motor generator (27), the revolving electric motor (33) and the electricity storage device (31) corresponding to the target electricity storage rate (SOC0) and the pump output limit (POL0).