JP2018017038A - Hybrid construction machine - Google Patents

Abstract

Provided is a hybrid construction machine capable of improving an operator's work efficiency in warm-up operation of a power storage device. The hydraulic excavator includes a hybrid controller that controls warm-up operation of a power storage device. The hybrid controller includes an output estimated by a hydraulic pump request output estimating unit and an engine. Whether the operation of the vehicle body is restricted with the warm-up operation of the power storage device 16 based on the upper limit of the output calculated by the output upper limit calculation unit 22B and the maximum power calculated by the allowable charge / discharge power calculation unit 16C5 And a display control unit 22C4 that performs control to display the fact on the monitor 5F when the operation restriction determination unit 22C2 determines that the operation of the vehicle body is limited. [Selection] Figure 7

Description

  The present invention relates to a hybrid construction machine including a power storage device that supplies electric power to a motor generator.

  In recent years, hybrid and electric vehicles are widely used in automobiles from the viewpoint of energy saving, and hybrids are also being promoted in construction machines. In general, a construction machine such as a hydraulic excavator that is driven by a hydraulic system drives a hydraulic pump that enables a maximum load work so that it can handle all work from light load work to heavy load work. And a large engine.

  However, heavy-duty work such as heavy excavation work that frequently digs and loads earth and sand in construction machinery is a part of the whole work, and the engine capacity is low during light-load work such as horizontal pulling to level the ground. It will remain. This is one of the factors that make it difficult to reduce the fuel consumption of the hydraulic excavator (hereinafter sometimes abbreviated as fuel efficiency).

  In view of this point, there is known a hybrid construction machine that downsizes an engine to reduce fuel consumption and assists (assist) output shortage due to downsizing of the engine with output from a power storage device and an electric motor. . Electric devices such as power storage devices and electric motors that constitute this hybrid construction machine require appropriate temperature control for thermal protection of the drive circuit and high-efficiency operation.

  In particular, power storage devices such as lithium-ion batteries and capacitors have a higher internal resistance in a low-temperature environment than that at room temperature, and the resulting output is reduced. Therefore, sufficient electric power to assist engine power is supplied to the motor. It cannot be supplied. In order to use the power storage device without causing such a decrease in output of the power storage device, it is necessary to warm the power storage device to a predetermined temperature or higher.

  Therefore, when the temperature of the power storage device is lower than a preset temperature, the engine is operated to perform a warm-up operation, and the motor generator is operated to charge / discharge the power storage device, thereby generating heat in the power storage device. A warming-up method of a construction machine has been proposed as one of the prior arts (see, for example, Patent Document 1).

  In addition, a heater core that heats the cabin, a first circulation system that supplies a heating medium to the heater core, a plurality of power storage cells connected in series, and a power storage device that includes a housing that stores the power storage cells; And a hybrid excavator that warms the power storage device by flowing the heating medium into the heating flow path. It has been proposed as one of other prior arts (see, for example, Patent Document 2).

JP 2010-127271 A JP 2014-15882 A

  The conventional techniques disclosed in Patent Documents 1 and 2 described above can perform the warm-up operation of the power storage device at low cost without separately preparing a heating mechanism such as an electric heater. Until the machine operation ends, the motor generator cannot sufficiently assist and generate power of the engine. As a result, the output for driving the hydraulic pump is lower than the output at normal temperature, so the flow rate discharged from the hydraulic pump is reduced, and the operating speed of the hydraulic actuator is slowed during the warm-up operation of the power storage device. At the same time, the operability related to the sensitivity of the operator including the power of the vehicle body and the responsiveness of the operating device is deteriorated. The inability to grasp the situation where the operation of the vehicle body is restricted is a psychological burden on the operator, which may cause a reduction in the work efficiency of the operator.

  The present invention has been made in view of such a state of the art, and an object of the present invention is to provide a hybrid construction machine that can improve an operator's work efficiency in warm-up operation of a power storage device.

  In order to achieve the above object, a hybrid construction machine of the present invention includes a prime mover, a motor generator that assists and generates power for the power of the prime mover, a hydraulic pump that is driven by the prime mover, and the motor generator. A power storage device that transfers power between the power storage device, a temperature measurement unit that measures the temperature of the power storage device, and a warm-up operation of the power storage device based on the temperature of the power storage device measured by the temperature measurement unit A hybrid construction machine having a control device for controlling, comprising a notification device for notifying information relating to the operation of the vehicle body, wherein the control device estimates a required output of the hydraulic pump , A prime mover output upper limit computation unit that computes an upper limit of the output of the prime mover, a maximum power computation unit that computes maximum power that can be charged and discharged by the power storage device, and the hydraulic pump Along with the warm-up operation of the power storage device, based on the output estimated by the power output estimation unit, the upper limit of the output calculated by the prime mover output upper limit calculation unit, and the maximum power calculated by the maximum power calculation unit An operation restriction determination unit that determines whether or not the operation of the vehicle body is restricted; and a control that informs the notification device to that effect when the operation restriction determination unit determines that the operation of the vehicle body is restricted. And a notification control unit for performing the operation.

  According to the hybrid construction machine of the present invention, it is possible to improve the operator's work efficiency in the warm-up operation of the power storage device. Problems, configurations, and effects other than those described above will become apparent from the following description of embodiments.

1 is a diagram illustrating a configuration of a hybrid hydraulic excavator cited as an example of a first embodiment of a hybrid construction machine according to the present invention. It is a functional block diagram which shows the structure inside the turning body shown in FIG. It is the schematic which looked at the inside of the turning body shown in FIG. 1 from back. It is an output-volume characteristic diagram explaining the load characteristic of the hydraulic pump shown in FIG. FIG. 3 is an SOC-output characteristic diagram illustrating temperature characteristics of the power storage device shown in FIG. 2. It is a functional block diagram which shows the structure of the battery controller shown in FIG. It is a functional block diagram which shows the structure of the hybrid controller shown in FIG. FIG. 4 is an operation amount-required load characteristic diagram illustrating load characteristics required for the traveling hydraulic motor shown in FIG. 3. It is a figure which shows the relationship between the engine speed shown in FIG. 2, and the upper limit of an output. It is a figure explaining the display of the monitor shown in FIG. It is a flowchart which shows the flow of control of the warming-up operation of the electrical storage apparatus by the output instruction | command part which concerns on 1st Embodiment of this invention, and is a flowchart explaining especially the process of S1101-S1111. It is a flowchart which shows the flow of control of the warm-up operation of the electrical storage apparatus by the output command part which concerns on 1st Embodiment of this invention, and is a flowchart explaining especially the process of S1112-S1117. It is a figure which shows the relationship of the temperature of an electrical storage apparatus, internal resistance, and operation | movement time limit with respect to the target temperature of the warming-up operation of the electrical storage apparatus which concerns on 1st Embodiment of this invention. It is a figure which shows an example of the time transition of the temperature of an electrical storage apparatus which concerns on 1st Embodiment of this invention, an output, and the presence or absence of warm-up operation. It is a figure explaining the structure of the principal part of the hybrid type hydraulic shovel which concerns on 2nd Embodiment of this invention. It is a figure which shows the relationship of the temperature of an electrical storage apparatus with respect to the target temperature of warm-up operation of the electrical storage apparatus which concerns on 2nd Embodiment of this invention, the temperature of engine cooling water, and operation | movement time limit.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the hybrid type construction machine which concerns on this invention is demonstrated based on figures.

[First Embodiment]
A first embodiment of a hybrid construction machine according to the present invention includes, for example, a hybrid hydraulic excavator 1 (hereinafter referred to as a hydraulic excavator for convenience) 1 shown in FIG. The hydraulic excavator 1 includes a traveling body 2 driven by a traveling hydraulic motor 2A (see FIG. 2), a revolving body 3 provided on the traveling body 2 via a revolving frame 3a so as to be able to revolve, A swiveling device 3A that is interposed between the traveling body 2 and the revolving body 3 and that is equipped with a turning hydraulic motor 3A1 (see FIG. 2) for revolving the revolving body 3 with respect to the traveling body 2, and a front of the revolving body 3 And a front work machine 4 that is attached to one side (facing the right side facing the front) and that rotates up and down to perform work such as excavation.

  The front work machine 4 includes a boom 4A whose base end is pivotally attached to the revolving frame 3a and pivots in the vertical direction, an arm 4B pivotally attached to the tip of the boom 4A, and the arm 4B. It has a multi-joint structure having a bucket 4C pivotally attached to the tip of the. The front work machine 4 connects the revolving body 3 and the boom 4A, connects the boom cylinder 4a that rotates the boom 4A by extending and contracting, the boom 4A and the arm 4B, and extends and contracts the arm 4B. The arm cylinder 4b that rotates the bucket 4C and the bucket cylinder 4c that connects the arm 4B and the bucket 4C and rotates the bucket 4C by expanding and contracting are provided.

  The revolving unit 3 includes a cab 5 disposed on the other side of the front part of the vehicle body (the left side facing forward), a counterweight 6 disposed on the rear part of the vehicle body to maintain the weight balance of the vehicle body, and these cabs. 5 and a counterweight 6, and a prime mover chamber 7 in which an engine 11 and the like to be described later are accommodated.

  FIG. 2 is a diagram showing details of the internal structure of the revolving structure 3 including the cab 5, and FIG. 3 is a schematic view of the inside of the revolving structure 3 as viewed from the rear.

  As shown in FIG. 2, the cab 5 is provided with desired hydraulic actuators 2A, 3A1, 4a to 4c such as a traveling hydraulic motor 2A, a turning hydraulic motor 3A1, a boom cylinder 4a, an arm cylinder 4b, and a bucket cylinder 4c. The operating lever 5A and the operating lever 5B as operating devices that can be operated and gripped and operated by an operator in the cab 5 are provided so as to be rotatable in the vertical direction, and the operation of the front work machine 4 by the operating lever 5B can be performed. It has a gate lock lever 5C that is operated to a lock position to be disabled or a lock release position that enables operation of the front work machine 4 by the operation lever 5B.

  When the gate lock lever 5C is pivoted upward to allow the operator to get on and off, the gate lock lever 5C is kept in the locked position, thereby ensuring safety when the operator gets on and off. On the other hand, when the gate lock lever 5C is pivoted downward to prevent the operator from getting on and off, the gate lock lever 5C is maintained in the unlocked position, so that the operator operates the operation lever 5B to advance the work such as excavation as intended. Can do.

  The cab 5 sets an operation mode of the vehicle body, sets a target rotational speed of the engine 11 in a mode setting unit 5D that changes a load required for the vehicle body, and an operation mode set by the mode setting unit 5D. It has a rotation speed setting dial 5E and a monitor 5F as a notification device that notifies the operator of various types of information including information related to the operation of the vehicle body. The mode setting unit 5D is, for example, an eco mode that is a mode for performing light load or medium load work such as light excavation work and leveling work, and a mode for performing work of higher load than the eco mode. It consists of a mode setting switch for selecting an operation mode consisting of a power mode. Note that the operation mode is not limited to the two types of eco mode and power mode, but may include other modes.

  As shown in FIGS. 2 and 3, the swing body 3 includes the engine 11 as a prime mover, a rotation speed sensor 11 </ b> A that is attached to the engine 11 and detects the rotation speed of the engine 11, and the fuel of the engine 11. A fuel tank (not shown) for storing, a governor (not shown) for adjusting the fuel injection amount of the engine 11, a turbocharger supercharger (not shown) provided in the engine 11, and the engine 11 And an engine controller (ECU) 12 for controlling the operation of the above.

  The revolving unit 3 is connected to the engine 11 and is disposed on an auxiliary machine load 13 such as an air conditioner that operates with the driving force of the engine 11 and the driving shaft of the engine 11, and transmits torque between the engine 11. Thus, a motor generator (M / G) 14 for assisting and generating power for the engine 11, an inverter 15 connected to the motor generator 14 for controlling the operation of the motor generator 14, and the inverter 15 And a power storage device 16 that transfers power to and from the motor generator 14.

  Further, the swing body 3 is connected in series to the engine 11 and the motor generator 14, and is operated by the driving force of the engine 11 and the motor generator 14 to discharge the pressure oil (hereinafter, referred to as a variable displacement hydraulic pump). (Referred to as a hydraulic pump for convenience) 17, a heat exchanger 18 that exchanges heat between the engine 11 and the hydraulic pump 17, and outside air is taken into the prime mover chamber 7 to induce cooling air, and this cooling air And a cooling fan 19 for blowing air to the heat exchanger 18.

  The motor generator 14 assists the power of the engine 11 during power running, drives the auxiliary load 13 and the hydraulic pump 17 connected to the engine 11, and generates power during regeneration. The inverter 15 converts DC power into AC power and converts AC power into DC power. The power storage device 16 includes, for example, a lithium ion battery 16A formed by stacking a plurality of battery cells, and a current sensor connected between the lithium ion battery 16A and the inverter 15 to measure the current of the lithium ion battery 16A. 16B, and a battery controller (BCU) 16C connected to the lithium ion battery 16A and the current sensor 16B and measuring and managing the voltage, temperature, current, and the like of the lithium ion battery 16A.

  Then, when the electric power (energy) stored in the lithium ion battery 16 </ b> A is supplied to the inverter 15, the inverter 15 converts the direct current into the alternating current and supplies it to the motor generator 14. As a result, the power storage device 16 is discharged. On the other hand, the electric power (energy) generated by the motor generator 14 is converted from AC to DC by the inverter 15 and supplied to the power storage device 16. Thereby, the electrical storage apparatus 16 is charged.

  The hydraulic pump 17 has, for example, a swash plate (not shown) as a variable displacement mechanism, and controls the flow rate of the discharged pressure oil by adjusting the tilt angle of the swash plate. Further, although not shown, the hydraulic pump 17 includes a discharge pressure sensor that measures the pressure of the discharged pressure oil, a discharge flow sensor that measures the flow rate of the discharged pressure oil, and a tilt of the swash plate of the hydraulic pump 17. A tilt angle sensor or the like for measuring the angle is provided. The hydraulic pump 17 will be described as a variable displacement swash plate type hydraulic pump. However, the present invention is not limited to this case, and any hydraulic pump 17 having a function of controlling the flow rate of the pressure oil to be discharged may be a diagonal pump or the like. There may be.

  The heat exchanger 18 includes, for example, a radiator 18A that creates cooling water for the engine 11, an oil cooler (not shown) that cools hydraulic oil, and an intercooler (not shown) that cools air supercharged by the supercharger. Z)). The cooling fan 19 is rotated by the driving force of the engine 11 so as to dissipate and cool the cooling water of the engine 11 returned to the heat exchanger 18 and the hydraulic oil of the hydraulic pump 17 by the cooling air taken into the prime mover chamber 7. I have to.

  The revolving unit 3 includes a control valve 20 that controls the flow (flow rate and direction) of the pressure oil supplied to the hydraulic actuators 2A, 3A1, 4a to 4c, and a pump capacity adjusting device 21 that adjusts the capacity of the hydraulic pump 17. , Travel lever 5A, operation lever 5B, gate lock lever 5C, mode setting switch 5D, rotation speed setting dial 5E, monitor 5F, hydraulic pump 17, engine controller 12, inverter 15, battery controller 16C, and pump capacity adjusting device 21 And a hybrid controller (HCU) 22 that controls the operation of the entire vehicle body.

  The control valve 20 forms a hydraulic circuit between the hydraulic pump 17 and the hydraulic actuators 2A, 3A1, and 4a to 4c. Although not shown, the control valve 20 is discharged from the hydraulic pump 17 by stroking in a housing that forms an outer shell. A spool for adjusting the flow rate and direction of the pressurized oil and an electromagnetic proportional valve for changing the stroke amount of the spool in accordance with a command value of the hybrid controller 22 are provided.

  FIG. 4 is a diagram for explaining the load characteristics of the hydraulic pump 17.

  The pump capacity adjusting device 21 adjusts the capacity (displacement volume) of the hydraulic pump 17 based on a control command output from the hybrid controller 22. Specifically, the pump capacity adjusting device 21 is not shown in the figure, but includes a regulator that supports the swash plate of the hydraulic pump 17 so as to be tiltable, and an electromagnetic proportional that applies a control pressure to the regulator according to a command value of the hybrid controller 22. And a valve. When the regulator receives a control pressure from the electromagnetic proportional valve, the displacement (displacement volume) of the hydraulic pump 17 is adjusted by changing the tilt angle of the swash plate of the hydraulic pump 17 by this control pressure. Thus, the load (pump output) of the hydraulic pump 17 can be adjusted by making the discharge pressure of the hydraulic pump 17 variable and controlling the absorption torque (input torque) of the hydraulic pump 17.

  The hybrid controller 22 inputs the discharge pressure measured by the discharge pressure sensor, the discharge flow rate measured by the discharge flow rate sensor, and the tilt angle measured by the tilt angle sensor. Calculate the load. Further, the hybrid controller 22 inputs operation signals for the travel lever 5A and the operation lever 5B in the cab 5, and outputs a control command corresponding to the operation amount of each lever 5A, 5B to the electromagnetic proportional valve of the control valve 20. It has become.

  Accordingly, when an operator in the cab 5 operates the travel lever 5A and the operation lever 5B, a control command corresponding to the operation amount of each lever 5A, 5B is input from the hybrid controller 22 to the electromagnetic proportional valve of the control valve 20. The position of the spool of the control valve 20 is switched, and the hydraulic oil that has flowed through the control valve 20 from the hydraulic pump 17 is supplied to the hydraulic actuators 2A, 3A1, 4a to 4c. Accordingly, the hydraulic actuators 2A, 3A1, 4a to 4c are driven by the pressure oil supplied from the hydraulic pump 17 via the control valve 20.

  Here, the temperature characteristics of the power storage device 16 will be described in detail with reference to FIG. FIG. 5 shows an example of the relationship between the SOC (State Of Charge) and the output of the power storage device 16 when the temperature of the lithium ion battery 16A of the power storage device 16 is three different temperatures.

  As shown in FIG. 5, the output of the lithium ion battery 16A increases as the SOC increases, but the output decreases as the temperature of the lithium ion battery 16A decreases. In particular, since the output is greatly reduced in a low temperature environment, it is necessary to perform the warm-up operation of the power storage device 16 to a temperature at which a sufficient output can be supplied. Therefore, in the first embodiment of the present invention, the hybrid controller 22 performs the warm-up operation by charging / discharging the power storage device 16 according to the temperature of the lithium ion battery 16A.

  In general, in a hybrid type application where charge and discharge are frequently repeated, the power storage device 16 is used in an SOC range of 30% to 70%, and the output required by the vehicle body is an operation selected by the operator using the mode setting switch 5D. It depends on the mode. When the operation mode is the power mode, since the output obtained from the power storage device 16 is insufficient unless the temperature of the power storage device 16 is high, the operation of the vehicle body including the operations of the revolving structure 3 and the front work machine 4 is performed. Although it is limited, when the operation mode is the eco mode, there is no problem as the output of the power storage device 16 even if the temperature of the power storage device 16 is lower than when the temperature is high. Therefore, even during the warm-up operation of the power storage device 16, the operator can proceed with excavation and the like without a sense of incongruity by switching the operation mode using the mode setting switch 5D.

  FIG. 6 is a functional block diagram showing the configuration of the battery controller 16C.

  The battery controller 16C converts the measurement values of the temperature measurement unit 16C1 that measures the temperature of the lithium ion battery 16A, the voltage measurement unit 16C2 that measures the cell voltage and the total voltage of the lithium ion battery 16A, and the current sensor 16B by AD conversion and inputs them. The SOC of the power storage device 16 is estimated based on the current measured by the current measuring unit 16C3, the temperature measured by the temperature measuring unit 16C1, the total voltage measured by the voltage measuring unit 16C2, and the current input by the current measuring unit 16C3. And an SOC estimation unit 16C4.

  Further, the battery controller 16C is based on the temperature measured by the temperature measurement unit 16C1, the total voltage measured by the voltage measurement unit 16C2, the current input by the current measurement unit 16C3, and the SOC estimated by the SOC estimation unit 16C4. And an allowable charge / discharge power calculation unit 16C5 as a maximum power calculation unit for calculating the allowable charge / discharge power that is the maximum chargeable / dischargeable power of the lithium ion battery 16A. The temperature measured by the temperature measurement unit 16C1, the SOC estimated by the SOC estimation unit 16C4, and the information on the allowable charge / discharge power calculated by the allowable charge / discharge power calculation unit 16C5 are input to the hybrid controller 22.

  Next, estimation of the SOC of power storage device 16 by SOC estimation unit 16C4 will be described in detail.

For example, the voltage of the lithium ion battery 16A in the relay open state before the vehicle body is operated, that is, the open circuit voltage is SOC (0), the integrated value of the charge / discharge current of the lithium ion battery 16A during the vehicle body operation is IS, lithium ion When the full charge capacity of the battery 16A is Cmax, the following formula (1) is established.

  Although not shown, SOC estimation unit 16C4 has an SOC-open circuit voltage table A in which the relationship between the SOC of power storage device 16 and the open circuit voltage is indicated. The SOC estimation unit 16C4 calculates the obtained SOC as SOC (0) by applying the open circuit voltage at the time of starting the vehicle body to the table A. Then, the SOC estimation unit 16C4 calculates the calculated SOC (0), the ratio of the integrated value IS of the charge / discharge current of the lithium ion battery 16A during operation of the vehicle body to the full charge capacity Cmax of the lithium ion battery 16A, and the above formula ( The amount of change is calculated from 1), and the current SOC of the power storage device 16 is obtained.

  Next, the calculation of the allowable charge / discharge power by the allowable charge / discharge power calculation unit 16C5 will be described in detail.

For example, when the allowable charging current is IC, the upper limit value of the voltage of the lithium ion battery 16A is Vmax, the open circuit voltage is Vo, the internal resistance is r, and the allowable charging power is EC, the following formulas (2) and (3) are obtained. To establish.

  Allowable charge / discharge power calculation unit 16C5 has an upper limit value Vmax and a lower limit value Vmin, which will be described later, of the voltage of lithium ion battery 16A. In addition, allowable charge / discharge power calculation unit 16C5 has a table B in which the relationship between the SOC of power storage device 16 and open circuit voltage Vo is indicated. Further, the allowable charge / discharge power calculation unit 16C5 has a table C in which the relationship between the SOC of the power storage device 16, the temperature of the lithium ion battery 16A, and the internal resistance r is stored. In addition, the upper limit value Vmax, the lower limit value Vmin, the open circuit voltage Vo, and the internal resistance r of the voltage of the lithium ion battery 16A are total values when a plurality of battery cells in the lithium ion battery 16A are connected.

  Allowable charge / discharge power calculation unit 16C5 calculates open circuit voltage Vo by applying the SOC estimated by SOC estimation unit 16C4 to table B. The allowable charge / discharge power calculation unit 16C5 calculates the internal resistance r by applying the SOC estimated by the SOC estimation unit 16C4 and the temperature measured by the temperature measurement unit 16C1 to the table C.

  Then, the allowable charging / discharging power calculation unit 16C5 substitutes the upper limit value Vmax of the voltage of the lithium ion battery 16A, the calculated open circuit voltage Vo, and the internal resistance r into the above formula (2), thereby allowing the allowable charging current IC Is calculated. Further, the allowable charging / discharging power calculation unit 16C5 calculates the allowable charging power EC by substituting the calculated allowable charging current IC, the open circuit voltage Vo, and the internal resistance r into Expression (3).

On the other hand, when the allowable discharge current is ID and the allowable discharge power is ED, the following mathematical formulas (4) and (5) are established.

  The allowable charge / discharge power calculation unit 16C5 calculates the lower limit value Vmin of the voltage of the lithium ion battery 16A, the open circuit voltage Vo calculated in the same manner as the calculation of the above-described allowable charge current IC, and the internal resistance r in the above equation (4). By substituting, the allowable discharge current ID is calculated. Further, the allowable charge / discharge power calculation unit 16C5 calculates the allowable discharge power ED by substituting the calculated allowable discharge current ID, the open circuit voltage Vo, and the internal resistance r into Equation (5). The calculation by the allowable charge / discharge power calculation unit 16C5 is performed for the purpose of controlling the voltage of the lithium ion battery 16A within a normal range in order to prevent the lithium ion battery 16A from thermally affecting the internal short circuit or the like. However, the present invention is not limited to this purpose. For example, it is limited by the SOC of the power storage device 16 for the purpose of preventing overcharge or overdischarge, or limited by the temperature of the lithium ion battery 16A for the purpose of preventing overcharge or overdischarge. May be provided separately.

  FIG. 7 is a functional block diagram showing the configuration of the hybrid controller 22.

  The hybrid controller 22 is connected to the travel lever 5A, the operation lever 5B, and the mode setting switch 5D, and estimates a hydraulic pump request output for estimating an output required for the hydraulic pump 17 (hereinafter referred to as a pump request output for convenience). 22A, an engine output upper limit calculation unit (prime engine output upper limit calculation unit) 22B that is connected to the engine controller 12 and calculates an upper limit of the output of the engine 11 (hereinafter referred to as an engine output upper limit for convenience), a hydraulic pump request The pump capacity adjusting device is connected to the output estimating unit 22A, the mode setting switch 5D, the gate lock lever 5C, the monitor 5F, the engine output upper limit calculating unit 22B, the battery controller 16C, the pump capacity adjusting device 21, the engine controller 12, and the inverter 15. 21, engine controller 12, and a And an output command portion 22C which outputs a control command to the converter 15.

  The hydraulic pump request output estimation unit 22A inputs the operation amount of the travel lever 5A and the operation lever 5B and the operation mode of the mode setting switch 5D, and based on these input information, the travel hydraulic motor 2A, the turning hydraulic motor Loads required for 3A1, boom cylinder 4a, arm cylinder 4b, and bucket cylinder 4c are estimated.

  FIG. 8 is a diagram illustrating load characteristics required for the traveling hydraulic motor 2A among the hydraulic actuators 2A, 3A1, and 4a to 4c.

  As shown in FIG. 8, the load required for the traveling hydraulic motor 2A is set so as to increase as the operation amount of the traveling lever 5A increases. Further, the load required for the traveling hydraulic motor 2A is set so as to change the magnitude according to the operation mode set by the operator with the mode setting switch 5D.

  For example, when the operator sets the operation mode of the vehicle body to the eco mode, the load required for the traveling hydraulic motor 2A is set low in order to emphasize the fuel consumption, and the operator sets the vehicle operation mode to the power mode. When set, the load required for the traveling hydraulic motor 2A is set high in order to emphasize the work speed. Therefore, the hydraulic pump request output estimation unit 22A estimates the load required for the traveling hydraulic motor 2A from the operation amount of the traveling lever 5A in the operation mode set by the mode setting switch 5D.

  The hydraulic pump required output estimation unit 22A also performs the above-described traveling hydraulic motor 2A for loads required for the swing hydraulic motor 3A1, the boom cylinder 4a, the arm cylinder 4b, and the bucket cylinder 4c, which are other hydraulic actuators. Similarly to the above, it is estimated from the operation amount of the operation lever 5B in the operation mode set by the mode setting switch 5D. Then, the hydraulic pump request output estimation unit 22A outputs an output command as a pump request output using the total load required for the traveling hydraulic motor 2A, the turning hydraulic motor 3A1, the boom cylinder 4a, the arm cylinder 4b, and the bucket cylinder 4c. To the unit 22C.

  FIG. 9 is a diagram showing the relationship between the rotational speed of the engine 11 and the upper limit of the output.

  As shown in FIG. 9, the engine output upper limit is determined by the rotational speed of the engine 11, and when the rotational speed of the engine 11 is low, the engine output upper limit increases as the rotational speed of the engine 11 increases and the engine 11 rotates. As the number increases, the engine output upper limit decreases as the rotational speed of the engine 11 increases. Thus, the engine output upper limit can be estimated from the rotational speed of the engine 11.

  In the first embodiment of the present invention, the engine output upper limit calculation unit 22B inputs the rotation speed of the engine 11 detected by the rotation speed sensor 11A via the engine controller 12, and calculates the engine output upper limit from this input information. To do. Then, engine output upper limit calculation unit 22B outputs the calculated engine output upper limit to output command unit 22C. The rotation speed of the engine 11 can be changed by the operator adjusting the target rotation speed with the rotation speed setting dial 5E.

  Based on the pump request output estimated by the hydraulic pump request output estimation unit 22A and the engine output upper limit calculated by the engine output upper limit calculation unit 22B, the output command unit 22C includes the pump capacity adjustment device 21, the engine controller 12, and The command value output to the inverter 15 is calculated. Then, the output command unit 22C outputs a pump output command, an engine output command, and an inverter power command to the pump capacity adjustment device 21, the engine controller 12, and the inverter 15 as control commands corresponding to the calculated command value, Each of these devices is controlled.

  In the first embodiment of the present invention, the output command unit 22C includes a charge / discharge power setting unit 22C1 that sets power to charge / discharge the power storage device 16, a pump request output estimated by the hydraulic pump request output estimation unit 22A, an engine Based on the engine output upper limit calculated by the output upper limit calculation unit 22B and the allowable charge / discharge power calculated by the allowable charge / discharge power calculation unit 16C5, the operation of the vehicle body is limited as the power storage device 16 warms up. And an operation restriction determination unit 22C2 for determining whether or not there is.

  The charge / discharge power setting unit 22C1 determines the pump request output and engine output upper limit estimated by the hydraulic pump request output estimation unit 22A when the temperature measured by the temperature measurement unit 16C1 is determined to be equal to or lower than the predetermined temperature T1. Based on the engine output upper limit calculated by the calculation unit 22B and the allowable charge / discharge power calculated by the allowable charge / discharge power calculation unit 16C5, the power for charging / discharging the power storage device 16 is set as the inverter power command. .

  Moreover, in 1st Embodiment of this invention, when the warming-up driving | operation of the electrical storage apparatus 16 is performed, 22 C of output command parts are until the temperature measured by the temperature measurement part 16C1 reaches the preset target temperature. It includes an operation time limit estimation unit 22C3 that estimates the time as an operation time limit during which the restriction of the operation of the vehicle body accompanying the warm-up operation of the power storage device 16 continues.

  When the operation restriction determination unit 22C2 determines that the operation of the vehicle body is restricted, the output command unit 22C displays the fact on the monitor 5F and the operation estimated by the operation restriction time estimation unit 22C3. A display control unit 22C4 that performs control to display the time limit on the monitor 5F is included. That is, the display control unit 22C4 functions as a notification control unit. Furthermore, the output command unit 22C performs control to switch the display of the operation time limit estimated by the operation time limit estimation unit 22C3 on the monitor 5F in accordance with the operation mode set by the mode setting switch 5D.

  FIG. 10 is a diagram showing a display screen of the monitor 5F in the cab 5. As shown in FIG.

  The information regarding the vehicle operation displayed on the monitor 5F in FIG. 10 includes, for example, the amount of fuel 5F1 stored in the fuel tank, the operation mode 5F2 set by the mode setting switch 5D (in the example shown in FIG. Mode), operation restriction information 5F3 regarding the restriction of the operation of the vehicle body accompanying the warm-up operation of the power storage device 16 determined by the operation restriction determination unit 22C2 (WarmUP indicating that the operation of the vehicle body is restricted in the example shown in FIG. 10) ), The operation time limit estimated by the operation time limit estimation unit 22C3 (10 minutes in the example shown in FIG. 10) 5F4.

  In addition, the information on the operation of the vehicle body includes the operation amount of the travel lever 5A and the operation lever 5B, the position of the gate lock lever 5C, the target rotation speed set by the rotation speed setting dial 5E, and the rotation detected by the rotation speed sensor 11A. Information such as the number, the SOC estimated by the SOC estimation unit 16C4, the pump request output estimated by the hydraulic pump request output estimation unit 22A, and the engine output upper limit calculated by the engine output upper limit calculation unit 22B. .

  Next, the control of the warm-up operation of the power storage device 16 by the output command unit 22C will be described in detail with reference to the flowchart of FIG. The control shown in FIG. 11 is performed, for example, when the excavator 1 is started under a low temperature environment.

  First, the output command unit 22C determines whether or not the temperature measured by the temperature measurement unit 16C1 is equal to or lower than a predetermined temperature T1 (step (hereinafter referred to as S) 1101). In S1101, when the output command unit 22C determines that the temperature measured by the temperature measurement unit 16C1 is greater than the predetermined temperature T1 (S1101 / NO), the power storage device 16 is not warmed up, and the power storage device 16 End the warm-up operation control.

  In S1101, when the temperature measured by the temperature measurement unit 16C1 is equal to or lower than the predetermined temperature T1 (S1101 / YES), the charge / discharge power setting unit 22C1 of the output command unit 22C estimates the hydraulic pump request output. Based on the pump request output estimated by the unit 22A and the engine output upper limit calculated by the engine output upper limit calculation unit 22B, the polarity of the power of the inverter 15 is estimated (S1102).

  At this time, for example, the charge / discharge power setting unit 22C1 calculates the power required for the inverter from the difference between the pump request output and the engine output upper limit (hereinafter referred to as inverter request power for convenience). Therefore, if the pump required output is larger than the engine output upper limit, the inverter required power becomes larger than 0 and becomes discharge power, and if the pump required output is smaller than the engine output upper limit, the inverter required power becomes smaller than 0 and the charging power. It becomes.

  In S1102, if the charge / discharge power setting unit 22C1 estimates that the inverter required power is greater than 0 (S1102 / YES), it determines whether the inverter required power is greater than the allowable discharge power calculated by the allowable charge / discharge power calculation unit 16C5. Determination is made (S1103). In the first embodiment of the present invention, in order to simplify the calculation by the output command unit 22C, the efficiency of the motor generator 14 and the inverter 15 is set to 100%, which is an ideal state in which no loss occurs.

  In S1103, when the charge / discharge power setting unit 22C1 determines that the inverter required power is larger than the allowable discharge power (S1103 / YES), it sets the allowable discharge power as the inverter power command (S1104). At this time, the output command unit 22C adjusts the inverter required power by an amount exceeding the allowable discharge power by reducing the output of the hydraulic pump 17 with respect to the pump required output. Done.

  In S1103, when the charge / discharge power setting unit 22C1 determines that the inverter required power is equal to or lower than the allowable discharge power (S1103 / NO), the inverter required power is set as the inverter power command (S1105), and the process of S1109 described later is performed. Done. On the other hand, when the charge / discharge power setting unit 22C1 estimates that the inverter required power is 0 or less in S1102 (S1102 / NO), the inverter request power is larger than the allowable charge power calculated by the allowable charge / discharge power calculation unit 16C5. Whether or not (S1106).

  In S1106, when the charge / discharge power setting unit 22C1 determines that the inverter required power is larger than the allowable charge power (S1106 / YES), the inverter required power is set as the inverter power command (S1107), and the process of S1109 described later is performed. Is called. In S1106, when the charge / discharge power setting unit 22C1 determines that the inverter required power is equal to or less than the allowable charge power (S1106 / NO), the charge / discharge power setting unit 22C1 sets the allowable charge power as the inverter power command (S1108). Done.

  In S1109, output command unit 22C sets the engine output upper limit as the engine output command, then sets the sum of the engine output command and the inverter power command as the pump output command, and warms up power storage device 16.

  Next, the operation restriction determination unit 22C2 of the output command unit 22C confirms the content of the inverter power command set by the charge / discharge power setting unit 22C1, and the operation of the vehicle body is restricted as the power storage device 16 warms up. It is determined whether or not (S1110). At this time, when it is confirmed that the inverter power command set by the charge / discharge power setting unit 22C1 is the inverter required power, the operation restriction determination unit 22C2 determines that the operation of the vehicle body is not restricted (S1110 / NO). Then, the process of S1111 described later is performed.

  On the other hand, in S1110, when the operation restriction determination unit 22C2 confirms that the inverter power command set by the charge / discharge power setting unit 22C1 is not the inverter required power, that is, the allowable discharge power or the allowable charge power, the operation of the vehicle body is performed. It is determined that it is restricted (S1110 / YES). Next, as shown in FIG. 12, the operation time limit estimation unit 22C3 of the output command unit 22C confirms whether or not the operation mode set by the mode setting switch 5D is the power mode (S1112).

  At this time, when it is confirmed that the operation mode set by the mode setting switch 5D is the power mode (S1112 / YES), the operation time limit estimation unit 22C3 estimates the operation time limit corresponding to the power mode (S1113). . In S1112, when the operation time limit estimation unit 22C3 confirms that the operation mode set by the mode setting switch 5D is the eco mode (S1112 / NO), the operation time limit estimation unit 22C3 estimates the operation time limit corresponding to the eco mode ( S1114).

  FIG. 13 is a diagram illustrating the relationship between the temperature of the power storage device 16, the internal resistance, and the operation time limit with respect to the target temperature for warm-up operation of the power storage device 16.

  As shown in FIG. 13, the operation time limit estimation unit 22C3 is for estimating the operation time limit indicating the relationship between the temperature of the power storage device 16, the internal resistance, and the operation time limit for each target temperature for the warm-up operation of the power storage device 16. Table D is stored in advance. The target temperature for warm-up operation of power storage device 16 is determined in advance by output command unit 22C based on, for example, the operation mode set by mode setting switch 5D and the SOC estimated by SOC estimation unit 16C4.

  Then, the operation time limit estimation unit 22C3 refers to the operation time limit estimation table D corresponding to the determined target temperature, and the temperature measured by the temperature measurement unit 16C1 with respect to this operation time limit estimation table D. By applying the internal resistance calculated by the allowable charge / discharge power calculation unit 16C5, the operation time limit can be obtained.

  Specifically, in the example shown in FIG. 13, the target temperature for warm-up operation of the power storage device 16 is 25 ° C., the temperature measured by the temperature measurement unit 16C1 is −10 ° C., and the allowable charge / discharge power calculation unit 16C5 is calculated. If the internal resistance is C, the operation limit time is m1. Further, if the target temperature for warm-up operation of the power storage device 16 is 25 ° C., the temperature measured by the temperature measuring unit 16C1 is 0 ° C., and the internal resistance calculated by the allowable charge / discharge power calculating unit 16C5 is B, the operation is limited. The time is j1.

  In S1113 or S1114 shown in FIG. 12, when the operation time limit estimation unit 22C3 estimates the operation time limit corresponding to the operation mode, the display control unit 22C4 of the output command unit 22C has the operation mode set by the mode setting switch 5D. If it is the power mode, “POWER” and “WarmUP” indicating the power mode are displayed on the monitor 5F, the operation time limit corresponding to the power mode is displayed, and the operation mode set by the mode setting switch 5D is the eco mode. If so, “ECO” and “WarmUP” indicating the eco mode are displayed on the monitor 5F, and the operation time limit corresponding to the eco mode is displayed (S1115).

  Next, the display control unit 22C4 checks whether or not the operation limit time estimated by the operation limit time estimation unit 22C3 is 0 (S1116). At this time, when the display control unit 22C4 confirms that the operation limit time estimated by the operation limit time estimation unit 22C3 is not zero (S1116 / NO), the processing from S1112 is repeated. On the other hand, in S1116, when the display control unit 22C4 confirms that the operation limit time estimated by the operation limit time estimation unit 22C3 is 0 (S1116 / YES), “WarmUP” and the operation limit time are displayed from the display of the monitor 5F. (S1117), as shown in FIG. 11, the output command unit 22C determines whether or not the temperature measured by the temperature measurement unit 16C1 is equal to or lower than a predetermined temperature T2 (S1111).

  At this time, if the output command unit 22C determines that the temperature measured by the temperature measurement unit 16C1 is equal to or lower than the predetermined temperature T2 (S1111 / YES), the processing from S1102 is repeated. In S1111, when the output command unit 22C determines that the temperature measured by the temperature measurement unit 16C1 is greater than the predetermined temperature T2 (S1111 / NO), the control of the warm-up operation of the power storage device 16 is terminated.

  FIG. 14 is a diagram illustrating an example of a time transition of the temperature, output, and presence / absence of warm-up operation of the power storage device 16. In this figure, the target temperature corresponding to the power mode is set to 30 ° C. as the temperature at which the vehicle body can operate without being restricted in the power mode, and the temperature at which the vehicle body can operate without being restricted in the eco mode. The target temperature corresponding to the eco mode is set to 15 ° C.

  As shown in FIG. 14, when the temperature of the power storage device 16 is −15 ° C. and the warming-up operation of the power storage device 16 is started by the output command unit 22C, the temperature and output of the power storage device 16 as time elapses. Rises. Then, when the temperature of the power storage device 16 reaches 30 ° C., which is the target temperature corresponding to the power mode, the output command unit 22C alternately repeats the execution and stop of the warm-up operation of the power storage device 16, thereby Is maintained at around 30 ° C., and the output that can be exhibited by the power storage device 16 becomes 100%.

  In such a time transition, when the operation mode is set to the eco mode, “ECO” and “WarmUP” are the operation time limit until the time t1 elapses after the warm-up operation of the power storage device 16 is started. At the same time, it is displayed on the monitor 5F. Then, when the time t1 has elapsed, that is, when the operation limit time becomes zero, the display of “WarmUP” and the operation limit time disappears from the monitor 5F.

  On the other hand, when the operation mode is set to the power mode, “POWER” and “WarmUP” are displayed on the monitor 5F together with the operation time limit until the time t2 elapses after the warm-up operation of the power storage device 16 is started. Is done. Then, when the time t2 has elapsed, that is, when the operation limit time becomes 0, the display of “WarmUP” and the operation limit time disappears from the monitor 5F.

  According to the hydraulic excavator 1 according to the first embodiment of the present invention configured as described above, when an operator in the cab 5 starts work using the travel lever 5A and the operation lever 5B in a low temperature environment, the power storage device Since the temperature of 16 is decreasing, the power storage device 16 is warmed up. At this time, by displaying “WarmUP” on the monitor 5F, the operator can easily grasp the situation where the operation of the vehicle body is restricted. Thereby, since an operator's psychological burden accompanying the warm-up operation of the power storage device 16 can be reduced, the work efficiency of the operator can be improved.

  Further, in the hydraulic excavator 1 according to the first embodiment of the present invention, during the warm-up operation of the power storage device 16, the operation time limit is displayed on the monitor 5F in addition to “WarmUP”. Since the operator can accurately know the time until the desired operation performance of the excavator 1 is obtained, the time can be effectively used by advancing the work with a low load on the vehicle body until the time elapses. . Thereby, productivity of work by the hydraulic excavator 1 can be increased.

  In the hydraulic excavator 1 according to the first embodiment of the present invention, when the operation mode is set to the power mode during the warm-up operation of the power storage device 16, the operator resets the eco mode with the mode setting switch 5D. Then, the operation time limit corresponding to the power mode is switched to the operation time limit corresponding to the eco mode on the screen of the monitor 5F. At this time, even if the operation time limit corresponding to the power mode has not reached 0, if the operation time limit corresponding to the eco mode has reached 0 and the display is erased, the horizontal pulling for leveling the ground is performed. The light load work such as the above can be performed without restricting the operation of the vehicle body. In this way, the operator can quickly respond to the operation of the vehicle body during the warm-up operation of the power storage device 16.

[Second Embodiment]
FIG. 15 is a diagram illustrating the configuration of the main part of a hydraulic excavator according to the second embodiment of the present invention.

  The second embodiment of the present invention is different from the first embodiment described above in that the excavator 1 according to the first embodiment is configured to charge / discharge the power storage device 16 and perform the warm-up operation of the power storage device 16. In contrast, the hydraulic excavator 1A according to the second embodiment is configured to perform the warm-up operation of the power storage device 16 using the cooling water of the engine 11.

  Specifically, the lithium ion battery 26A of the power storage device 26 according to the second embodiment of the present invention includes a plurality of battery modules 26A1 configured by connecting a plurality of battery cells 26a, and the inside of these battery modules 26A1. Each battery cell 26a and a heat exchange member that performs heat exchange are included.

  This heat exchange member is, for example, arranged under a plurality of battery modules 26A1 via a heat conductive sheet (not shown), and includes a temperature adjustment plate 26A2 as a structure for cooling the plurality of battery cells 26a. . The temperature adjustment plate 26A2 is composed of a rectangular base on which the battery module 26A1 is placed, and a plurality of U-shaped grooves serving as cooling water passages for the engine 11 are formed inside the base. Has been.

  Further, the heat exchanger 28 according to the second embodiment of the present invention is a flow in which cooling water circulates between the engine 11 and the radiator 18A in addition to the radiator 18A, the oil cooler, and the intercooler similar to those in the first embodiment. A circuit 28A that forms a path, a drive pump 28B that is provided in the circuit 28A and pumps the coolant of the engine 11 created by the radiator 18A to the engine 11, and a temperature sensor that measures the temperature of the coolant in the circuit 28A 28C.

  Further, the heat exchanger 28 is connected to the circuit 28A via the bypass valve 28D, and a circuit 28E that distributes the cooling water in the circuit 28A to the groove on the battery module 26A1 side (upper side) of the temperature adjustment plate 26A2; A circuit 28F disposed in the plate 26A2 in proximity to the circuit 28E via another groove (lower side) and forming a flow path through which a cooling medium for heat exchange with the cooling water in the circuit 28E circulates; Is included.

  The heat exchanger 28 is provided in the circuit 28F, and the above-described radiator 28G that creates the cooling medium, and the drive pump 28H that is provided in the circuit 28F and pumps the cooling medium created by the radiator 28G to the temperature adjustment plate 26A2. And a temperature sensor 28I for measuring the temperature of the cooling medium in the circuit 28F.

  In the second embodiment of the present invention, the lithium ion battery 26A, the drive pumps 28B and 28H, the bypass valve 28D, and the temperature sensors 28C and 28I are connected to the hybrid controller 22 via the battery controller 16C. It is driven in accordance with 22 control commands.

  Therefore, when the warming-up operation of the power storage device 16 is performed, the output command unit 22C of the hybrid controller 22 drives the drive pump 28B to circulate the cooling water for the engine 11 created by the radiator 18A in the circuit 28A. Next, the output command unit 22C opens the bypass valve 28D to flow the cooling water in the circuit 28A to the circuit 28E. Thereafter, when the cooling water in the circuits 28A and 28E is gradually warmed by the exhaust heat of the engine 11, the cooling water in the circuit 28E and each battery cell 26a of the battery module 26A1 exchange heat with each other. Thereby, the temperature of power storage device 16 can be raised to the target temperature.

  On the other hand, when the warming-up operation of the power storage device 16 is completed, the output command unit 22C drives the drive pump 28H to circuit the cooling medium created by the radiator 28G so that the temperature of the power storage device 16 does not rise too much. Circulate in 28F. Thereby, since the cooling water in the circuit 28E and the cooling medium in the circuit 28F exchange heat with each other, the cooling water of the engine 11 can be adjusted to an appropriate temperature at the time of work.

  FIG. 16 is a diagram showing the relationship between the temperature of the power storage device 16, the temperature of the cooling water of the engine 11, and the operation limit time with respect to the target temperature for warm-up operation of the power storage device 16.

  As shown in FIG. 16, the operation limit time estimation unit 22C3 of the output command unit 22C has the temperature of the power storage device 16, the temperature of the coolant of the engine 11, and the operation limit for each target temperature of the warm-up operation of the power storage device 16. An operation limit time estimation table E indicating the time relationship is stored in advance. Then, the operation time limit estimation unit 22C3 refers to the operation time limit estimation table E corresponding to the determined target temperature, and the temperature measured by the temperature measurement unit 16C1 with respect to the operation time limit estimation table E. By applying the temperature measured by the temperature sensor 28C, the operation time limit can be obtained.

  Specifically, in the example illustrated in FIG. 16, the target temperature for warm-up operation of the power storage device 16 is 25 ° C., the temperature measured by the temperature measurement unit 16C1 is −10 ° C., and the temperature measured by the temperature sensor 28C is C. If so, the operation time limit is m2. Further, if the target temperature for warm-up operation of power storage device 16 is 25 ° C., the temperature measured by temperature measuring unit 16C1 is 0 ° C., and the temperature measured by temperature sensor 28C is B, the operation time limit is j2. . In addition, the structure of other 2nd Embodiment is the same as that of 1st Embodiment mentioned above, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment, or respond | corresponds, and the overlapping description is abbreviate | omitted.

  According to the hydraulic excavator 1 </ b> A according to the second embodiment of the present invention configured as described above, the same effects as those of the first embodiment described above can be obtained, and the power storage device 16 can be charged and discharged without charging or discharging the engine 11. Since the power storage device 16 is warmed up using exhaust heat, the load on the power storage device 16 due to the warm-up operation can be sufficiently reduced. Thereby, the durability of the power storage device 16 can be improved, so that the life of the power storage device 16 can be increased.

  In addition, this embodiment mentioned above was described in detail in order to demonstrate this invention easily, and is not necessarily limited to what is provided with all the demonstrated structures. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment.

DESCRIPTION OF SYMBOLS 1,1A ... Hydraulic excavator (hybrid construction machine), 5 ... Cab, 5D ... Mode setting switch (mode setting part), 5F ... Monitor (notification device), 11 ... Engine (motor), 14 ... Motor generator, 16 , 26 ... Power storage device, 16A, 26A ... Lithium ion battery, 16C ... Battery controller, 16C1 ... Temperature measurement unit, 16C2 ... Voltage measurement unit, 16C3 ... Current measurement unit, 16C4 ... SOC estimation unit, 16C5 ... Allowable charge / discharge power calculation Unit (maximum power calculation unit), 17 ... hydraulic pump, 18, 28 ... heat exchanger, 18A, 28G ... radiator 22 ... hybrid controller, 22A ... hydraulic pump required output estimation unit, 22B ... engine output upper limit calculation unit (motor output) Upper limit calculation unit), 22C... Output command unit, 22C1... Charge / discharge power setting unit, 22C2. 2C3 ... Operation time limit estimation unit, 22C4 ... Display control unit (notification control unit), 26A1 ... Battery module, 26A2 ... Temperature adjustment plate, 26a ... Battery cell, 28A, 28E, 28F ... Circuit, 28B, 28H ... Drive pump, 28C, 28I ... temperature sensor, 28D ... bypass valve

Claims (3)

Prime mover,
A motor generator for assisting power generation and generating power of the prime mover;
A hydraulic pump driven by the prime mover;
A power storage device that exchanges power with the motor generator;
A temperature measuring unit for measuring the temperature of the power storage device;
A hybrid construction machine including a control device that controls a warm-up operation of the power storage device based on the temperature of the power storage device measured by the temperature measurement unit,
A notification device for notifying information on the operation of the vehicle body;
The controller is
A hydraulic pump required output estimating unit for estimating an output required for the hydraulic pump;
A prime mover output upper limit computing unit for computing an upper limit of the output of the prime mover;
A maximum power calculator that calculates the maximum power of the power storage device that can be charged and discharged;
Based on the output estimated by the hydraulic pump required output estimation unit, the upper limit of the output calculated by the prime mover output upper limit calculation unit, and the maximum power calculated by the maximum power calculation unit, the warm-up operation of the power storage device An operation restriction determination unit that determines whether or not the operation of the vehicle body is restricted along with,
A hybrid construction machine, comprising: a notification control unit that performs control to notify the notification device of the fact that the operation restriction determination unit determines that the operation of the vehicle body is limited. The hybrid construction machine according to claim 1,
When the warm-up operation of the power storage device is performed, the control device includes a time until the temperature measured by the temperature measurement unit reaches a preset target temperature in accordance with the warm-up operation of the power storage device. Including an operation time limit estimating unit that estimates an operation time limit for which the operation limit of the vehicle body continues,
The hybrid control machine, wherein the notification control unit controls the notification device to notify the operation limit time estimated by the operation limit time estimation unit. The hybrid construction machine according to claim 2,
A cab on which the operator is boarded;
A mode setting unit which is provided in the cab and sets an operation mode determined for each load required for the vehicle body;
The notification device includes a display device that displays a determination result of the operation restriction determination unit and an estimation result of the operation restriction time estimation unit,
The notification control unit performs control to switch display of the operation time limit estimated by the operation time limit estimation unit on the display device according to the operation mode set by the mode setting unit. Hybrid construction machine.