Work vehicles

Abstract

To provide a work vehicle having a fuel cell and a driving motor driven by the fuel cell capable of working and traveling using electric power reliably generated by the fuel cell during assumed work with a simple configuration.SOLUTION: The work vehicle includes: a fuel cell mounted on a running body; a motor driven by the fuel cell; a temperature sensor that detects the temperature of the fuel cell; and a control unit that controls the start and end of the fuel cell. The control unit is configured to execute a preparation control to perform a warming operation to automatically start the fuel cell in advance so that the temperature of the fuel cell becomes the operating temperature at which the fuel cell operates efficiently by the target time by presetting the target time.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a work vehicle equipped with a motor driven by a fuel cell. [Background technology]

[0002] A work vehicle described in Patent Document 1 is known in the art and is equipped with a fuel cell mounted on a traveling vehicle body, a motor driven by the fuel cell, a heating means for raising the temperature of the fuel cell to an operating temperature at which the fuel cell operates efficiently, and a temperature sensor for detecting the temperature of the fuel cell.If it is detected that the fuel cell has not been warmed up to its operating temperature (steady state), the drive system of the traveling vehicle body is switched to stop driving by the fuel cell, thereby preventing abnormal damage caused by generating electricity when the fuel cell has not yet reached its steady state and achieving a longer lifespan.

[0003] In addition, a work vehicle described in Patent Document 2 is known in the art, which is equipped with a fuel cell mounted at the front of the traveling body, a traveling motor for traveling, and a PTO motor for a work machine provided at the rear of the traveling body, and has good front-to-rear balance of the traveling body, can drive the traveling motor and PTO motor with clean energy, and also reduces noise when driving.

[0004] Furthermore, a combine harvester described in Patent Document 3 is known in the art, which is equipped with a motor driven by the fuel cell and a harvesting device driven by the motor, and which improves energy efficiency compared to a combine harvester that uses power stored in a battery to drive the harvesting device by driving the motor driven by power generated by the fuel cell.

[0005] According to the work vehicles described in Patent Documents 1 to 3, by installing the fuel cell in the traveling body, it is possible to travel for work using electricity generated highly efficiently and cleanly. However, since it usually takes time for the fuel cell to reach a steady state where it operates efficiently, there is a problem that when starting work travel, the fuel cell may not be able to generate electricity efficiently, or the fuel cell may not be usable at all. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-10406 [Patent Document 2] Japanese Patent Application Laid-Open No. 2003-136970 [Patent Document 3] Japanese Patent Application Publication No. 2019-205409 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention aims to provide a work vehicle equipped with a fuel cell and a drive motor driven by the fuel cell, which is configured with a simple structure so that it can reliably perform work travel using electricity generated by the fuel cell during intended work. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention teeth The vehicle comprises a fuel cell mounted on a traveling vehicle body, a motor driven by the fuel cell, a temperature sensor for detecting the temperature of the fuel cell, and a control unit for controlling the start and end of startup of the fuel cell, and the control unit is configured to be able to execute preparatory control for automatically starting the fuel cell in advance to perform warm-up work so that the operating temperature of the fuel cell reaches an operating temperature at which the fuel cell operates efficiently by setting a target time in advance. A position information acquisition device is provided to acquire the coordinate position of the traveling machine body, and the control unit is configured to execute the preparation control when the position information acquisition device detects that the traveling machine body is at a predetermined position. It is characterized by the following.

[0009] The aforementioned A mobile terminal capable of communicating with the control unit is provided, and the mobile terminal has an operation means for operating the setting of the target time. It may also be .

[0010] agricultural work a work plan creation means for creating a work plan including the start time of the work, and the control unit is configured to automatically execute the preliminary warm-up work in accordance with the start time of the agricultural work recorded in the work plan. It may also be .

[0011] The aforementioned A supply means is provided for supplying the power generated by the fuel cell or the heat emitted from the fuel cell to the outside. It may also be .

[0012] The aforementioned A battery is provided which is mounted on the traveling vehicle and is charged by a fuel cell, and the control unit is configured to execute the start-up termination of the fuel cell after detecting that the battery is charged to a predetermined level or more. It may also be . [Effects of the Invention]

[0013] The preparation means is configured to automatically perform preliminary warm-up operations so that the fuel cell reaches operating temperature by a preset target time, so that when the worker begins work, the fuel cell is already maintained at operating temperature, allowing work vehicles equipped with fuel cells that require time for advance preparation to begin work driving smoothly.

[0014] Furthermore, if a portable terminal capable of communicating with the control unit is provided and the portable terminal has an operating means for operating the setting of the target time, the worker can set the target time for executing the preparation means in advance without getting on the traveling vehicle, thereby improving convenience.

[0015] In addition, if a work plan creation means is provided that creates a work plan including the start time of the agricultural work, and the control unit is configured to automatically perform pre-warming work in accordance with the start time of the agricultural work recorded in the work plan, by creating a work plan in advance using the work plan creation means, it is possible to set a target time for automatically performing pre-warming work, thereby improving convenience and work efficiency.

[0016] In addition, if a position information acquisition device is provided to acquire the coordinate position of the running vehicle, and the control unit is configured to execute the preparatory control when the position information acquisition device detects that the running vehicle is in a predetermined position, the fuel cell can be prevented from heating up when the running vehicle is placed in an unintended position, thereby improving safety.

[0017] Furthermore, by providing a supply means for supplying the electricity generated by the fuel cell or the heat emitted from the fuel cell to the outside, the electricity generated by the fuel cell and the heat emitted from the fuel cell can be effectively utilized when the fuel cell is maintained at its operating temperature (steady state) and the vehicle is in standby mode without being used for work driving.

[0018] In addition, if a battery is provided that is mounted on the traveling vehicle and charged by a fuel cell, and the control unit is configured to execute start-up and shutdown of the fuel cell after detecting that the battery has been charged to a predetermined level, the time required to charge the battery during the next work trip can be reduced, thereby contributing to a smooth start of work. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a conceptual diagram showing a starting control system configured in a work vehicle to which the present invention is applied. [Figure 2] FIG. 10 is a diagram showing a supply mode of the work vehicle. [Figure 3] FIG. 2 is a block diagram of a work vehicle. [Figure 4] FIG. 2 is a block diagram showing the configuration of a control device. [Figure 5] FIG. 2 is a block diagram of a user terminal. [Figure 6] FIG. 2 is a block diagram of an information processing server. DETAILED DESCRIPTION OF THE INVENTION

[0020] Fig. 1 is a conceptual diagram showing a startup control system configured for a work vehicle to which the present invention is applied, Fig. 2 is a diagram showing the supply mode of the work vehicle, and Fig. 3 is a block diagram of the work vehicle. The work vehicle 10 of the present invention is equipped with a fuel cell 5A and a control device 50 that controls the startup of the fuel cell 5A, and the control device 50 is communicably connected to a user terminal (mobile terminal) 20 and an information processing server (farming server) 30 via a global network 1 such as the Internet. This configures a fuel cell control system (startup control system) that controls the startup and startup termination of the fuel cell 5A (see Fig. 1).

[0021] In the embodiment, the work vehicle 10 will be described based on the tractor shown in the drawings, but the invention can also be applied to riding work vehicles such as riding rice transplanters, combine harvesters, riding mowers, and unmanned work vehicles as long as they are equipped with a fuel cell 5A. The specific configuration of the work vehicle 10 will be described below with reference to Figures 1 to 4.

[0022] The work vehicle 10 comprises a running body 3 supported by a pair of left and right front wheels 1,1 and rear wheels 2,2, the fuel cell 5A installed on the running body 3, a bonnet 4 provided at the front of the running body 3, and a control unit 6 installed behind the bonnet 4, and is configured to be connectable to the rear side of a work machine such as a rotary tiller (not shown).

[0023] The traveling body 3 has a fuel tank (not shown) on its front side (the hood 4) that stores fuel (hydrogen gas, fuel gas) for the fuel cell 5A, and at its rear side is the main body of the fuel cell 5A, specifically, a fuel cell stack (not shown), which is a heavy object made up of a large number of stacked cells that make up the fuel cell 5A.

[0024] According to this configuration, when a work machine is connected to the rear of the traveling body 3, it becomes easier to optimize the longitudinal weight balance of the entire work vehicle 10, and also to improve the traction force when a heavy object is connected to the rear of the traveling body 3 and towed. The fuel cell stack may also be arranged inside the hood 4 to facilitate maintenance.

[0025] The work vehicle 10 also comprises the fuel cell 5A, a temperature sensor 5B that detects the temperature of the fuel cell 5A, a battery 11 that stores (charges) the electricity generated by the fuel cell 5A, an inverter 12 that converts the electricity of the battery 11, an electric motor 13 that serves as the power source for the running body 3 and the driving force of the work equipment, an alarm device 14 that issues alerts to the worker, a touch panel 16 that is an example of an input means, an LCD panel 17 that is an example of an output means, and the control device (ECU) 50, and the control device 50 is configured to be connectable to the user terminal 20 and the work processing server 30 via a communication device and a network 1 (see Figure 3, etc.).

[0026] The fuel cell 5A is a clean power generation system that can generate electricity without emitting carbon dioxide by generating electricity through an electrochemical reaction between an oxidant gas supplied to the cathode electrode and a fuel gas supplied to the anode electrode. In this embodiment, a solid oxide fuel cell (SOFC) that uses a solid oxide (oxygen ion conductive oxide) as the electrolyte of the fuel cell 5A is used.

[0027] Here, the operating temperature of the fuel cell (SOFC) 5 is very high (approximately 700 to 1000°C, and even low-temperature applications are above 100°C), so there is a problem that it takes some time after starting up the fuel cell for it to heat up to an operating temperature (steady state) at which it can efficiently generate electricity.

[0028] In response to this, the control device 50 is configured so that the operator can use an input means 16 such as a touch panel on the traveling body 3 to pre-set and input the scheduled start time of the work trip or a target start time (target time, schedule) that is a time some time before the scheduled start time, and the control device 50 can then perform start-up control (preparation control) that automatically starts up the fuel cell 5A and completes warm-up work (warm-up operation) in advance so that the fuel cell 5A reaches the operating temperature (steady state) at the set target start time.

[0029] At this time, the warm-up time required to bring the fuel cell 5A up to the operating temperature can be appropriately set according to the temperature of the fuel cell 5A main body detected by the temperature sensor 5B. This allows the control device 50 to accurately calculate the startup start time at which automatic startup of the fuel cell 5A begins, based on the set target start time and the calculated warm-up time.

[0030] According to this configuration, the work vehicle 10 can have the fuel cell 5A installed therein waiting at a predetermined operating temperature (steady state) at the preset target start time, so that the work vehicle 10 can smoothly start work driving from the scheduled work start time.

[0031] On the other hand, the startup control is configured so that the operator can use an input means 16 such as a touch panel on the traveling body 3 to pre-set and input a target end time (target time, schedule), and the startup and termination of the fuel cell 5A and the cooling process are automatically performed at the set target end time.

[0032] The control device 50 is configured to be wirelessly connected to the user terminal 20 via the network 1, and an operator can remotely control the startup and startup termination operations of the fuel cell 5A using the user terminal 20. The user terminal 20 and the control device 50 may be configured to be connectable by an NFC tag (near field communication).

[0033] The control device 50 is also configured so that the target time can be set remotely using the user terminal 20. In other words, the worker can execute the startup control by remote operation using the user terminal 20. This eliminates the need for the worker to get into the control section of the work vehicle 10 and start up the fuel cell 5A before commencing work travel, thereby improving convenience.

[0034] Here, the work processing server 30 is configured to be able to create a work plan for carrying out a work trip using the work vehicle 10. The work plan has schedule information relating to at least the date and time when the work trip will begin by the work vehicle 10 (the target start time), and may also include information relating to the target end time, the planned work time, the location and size of the field where the work trip will be carried out, the content of the work trip, and information regarding the location (garage) where the work vehicle 10 will wait to be used.

[0035] The work processing server 30 is configured to be connectable to the user terminal 20 via the network 1, and the user terminal 20 is configured to be able to input (create) a work plan using a dedicated app, web browser, etc. The work plan may also be created using input means such as a keyboard or mouse provided on the work processing server 30 side.

[0036] In response to this, the control device 50 is configured to be able to link the execution of the startup control with the work plan created by the work processing server 30. Specifically, the control device 50 is configured to be able to automatically start up the fuel cell 5A in advance to complete the warm-up work, and to automatically execute the startup, shutdown, and cooling work of the fuel cell 5A, in accordance with the target start time and target end time described in the created work plan (schedule information).

[0037] According to this configuration, by creating the work plan for a certain period in the future in advance, the worker can execute the startup control without having to set the target time in advance each time using the touch panel or the user terminal 20. This effectively prevents situations such as the worker forgetting to set the target time, which results in the startup control not being executed and the warm-up of the fuel cell 5A not being completed before the start of work, thereby further improving convenience.

[0038] Furthermore, the control device 50 not only controls the startup and termination of the fuel cell 5A through the startup control, but also, when the startup and termination operation of the fuel cell 5A is performed using the touch panel, the user terminal, or other operating device, it checks the charge level of the battery 11, and after detecting that the battery 11 is charged to a predetermined level (fully charged), it is configured to start and terminate the startup of the fuel cell 5A and perform cooling work on the fuel cell 5A.

[0039] According to this configuration, the next time the fuel cell 5A is started up, there is no need to charge the battery 11, which makes the start-up process of the fuel cell 5A smoother. Also, since the fuel cell 5A does not have to be started up just to charge the battery 11, unnecessary ON / OFF of the fuel cell 5A is eliminated, which can suppress deterioration.

[0040] As shown in FIG. 3, the work vehicle 10 also has a GNSS sensor 9 that acquires position information of the traveling machine body 3.

[0041] In response to this, the control device 50 is configured to specify in advance a waiting area such as a garage where the automatic warm-up operation of the fuel cell 5A can be safely initiated using the startup control, and the startup control is executed only when it is detected that the work vehicle 10 is in the specified garage.

[0042] With this configuration, even if the worker sets the target start time, the fuel cell 5A will not start automatically if it is confirmed by the GNSS sensor 9 that the work vehicle 10 is not at a designated waiting area. In other words, if the work vehicle 10 is in a location not intended by the worker, the fuel cell 5A can be prevented from starting automatically and becoming too hot, thereby improving safety.

[0043] In addition, the fuel cell system 5 (the fuel cell 5A and the temperature sensor 5B) mounted on the work vehicle 10 is configured so that it can be connected to an external facility 8 via a supply means 7, as shown in Figures 2 and 3.

[0044] The supply means 7 is configured to connect the fuel cell 5A to an external facility 8 such as a greenhouse or power storage facility, thereby supplying the power (surplus power) generated by the fuel cell 5A to the power storage facility installed in the external facility (such as a house), and supplying the waste heat emitted from the fuel cell 5A to the external facility (a greenhouse in the illustrated example) 8. This allows the work vehicle 10 to more efficiently utilize the surplus power generated by the fuel cell 5A and the waste heat generated by the fuel cell 5A during power generation.

[0045] In response to this, the control device 50 is configured to be able to execute maintenance control for maintaining the operating temperature (steady state) of the fuel cell 5A.

[0046] According to this configuration, while the maintenance control is being performed, the power generated by the fuel cell 5A and the heat emitted from the fuel cell 5A can be supplied to the external equipment 8 using the supply means 7, and can be utilized without waste.

[0047] As a result, for example, if the fuel cell 5A is stopped and cooled when it is at operating temperature (steady state), and it is not possible to raise the fuel cell 5A back up to operating temperature in time for the next set target time, or if fuel efficiency is poor once the fuel cell 5A is stopped and started, the maintenance control can be carried out until work driving is resumed, and the surplus electricity and exhaust heat generated during that time can be effectively utilized by the supply means 7, thereby achieving both a smooth start (restart) of work driving and efficient use of the energy of the fuel cell 5A.

[0048] Furthermore, by providing the supply means 7 to the work vehicle 10, even when there are times (seasons) when the vehicle is not traveling for work, the fuel cell 5A can be operated to supply power to the external facility 8, such as a power storage facility, an electric fence in the field, a water supply pump, etc., and exhaust heat can also be supplied to the greenhouse, etc. Therefore, the fuel cell 5A mounted on the work vehicle 10 can be utilized at any time without being wasted.

[0049] Incidentally, the work vehicle 10 may be configured to be provided with a lithium ion battery (LIB) (not shown) in addition to the fuel cell 5A, and the electric motor 13 may be driven by power from the lithium ion battery before the fuel cell 5A reaches a steady state, or a separate dedicated motor may be provided. In this case, when the fuel cell 5A is in the warm-up operation, the lithium ion battery and waste heat from the motor may be used to more efficiently heat up the fuel cell 5A.

[0050] Next, the startup control process by the fuel cell control system will be described with reference to Figures 4 to 6. Figure 4 is a block diagram showing the detailed configuration of the control device 50. The control device 50 includes a control unit 51 that is composed of a CPU, RAM, or the like and is capable of performing various processes by executing various programs, a storage device 52 that stores various information and constitutes part of the storage device of the fuel cell control system, input / output means that is composed of a touch panel 16, a liquid crystal panel 17, or the like, a local wireless communication interface (communication device) 18B that enables wireless communication such as Wi-Fi, and a global wireless interface (communication device) 18A that enables wireless communication via a network such as the Internet.

[0051] The control unit 51 includes an information processing unit 51a that processes information input via the input / output means 16, 17 and the user terminal 20, an information management unit 51b that manages information such as the set target time, a schedule creation unit 51c that creates a schedule for starting and stopping the fuel cell 5A based on the set target time, a startup control unit 51d that controls the start of startup of the fuel cell 5A, a temperature maintenance control unit 51e that maintains the fuel cell 5A in a steady state, a termination control unit 51f that controls the startup and termination operations of the fuel cell 5A, a time change unit 51g that accepts operations to change the set target time, and a motor control unit 51h that controls the drive of the electric motor 13.

[0052] The schedule creation unit 51c calculates the startup start time (time) of the fuel cell 5A based on the set target start time and the time required to bring the fuel cell 5A to the operating temperature (steady state) through warm-up operations, and the control unit 51 can create a schedule consisting of the automatic startup start time (and startup end time) of the fuel cell 5A.

[0053] At this time, the time required to warm up the fuel cell 5A to its operating temperature through the warm-up operation is changed as appropriate according to the temperature of the fuel cell 5A detected by the temperature sensor 5B. This configuration makes it possible to more accurately grasp the time required for the warm-up operation, thereby preventing fuel from being wasted by taking longer than necessary for the warm-up operation and also preventing a situation in which the warm-up operation of the fuel cell 5A has not yet been completed when the operation begins.

[0054] The start-up control unit (control unit) 51d can automatically start up the fuel cell 5A and start the warm-up process based on the schedule created by the schedule creation unit 51c, thereby making it possible to bring the fuel cell 5A to an operating temperature (steady state) by a set target time.

[0055] The termination control unit 51f is configured to start the start-up / shutdown operation and the cooling operation of the fuel cell 5A based on the schedule created by the schedule creation unit 51c. The termination control unit 51f may be configured to notify the fact through the notification device 14 at a set target end time, or to complete the start-up / shutdown operation and the cooling operation of the fuel cell 5A at the set target end time.

[0056] The temperature maintenance control unit 5e is configured to continue activation of the fuel cell 5A and maintain the operating temperature for a set maintenance time or until the next target start time when the fuel cell 5A is in a steady state. Specifically, when the temperature sensor 5B detects that the temperature of the fuel cell 5A has dropped below a predetermined temperature, the activation (heating) control unit 51d heats up the fuel cell 5A to a temperature equal to or higher than the operating temperature (predetermined temperature), thereby maintaining the steady state of the fuel cell 5A.

[0057] The storage device 52 includes a machine information storage unit 52a storing registration information regarding the work vehicle 10 for which the startup control is executed, a start / end time storage unit 52b storing set target times (start target time and end target time) and the startup start time and startup end time of the fuel cell 5A calculated based on these, and a location information storage unit 52c storing location information regarding a waiting location that enables the startup control to be executed.

[0058] 5 is a block diagram showing the configuration of a user terminal. The user terminal 20 is an information terminal such as a smartphone, a mobile phone, or a tablet or notebook personal computer equipped with a general-purpose OS, and includes a control unit 21 configured with a CPU or RAM or the like and capable of performing various processes by executing various programs, a storage device 22 in which various information is stored and which constitutes part of the storage device of the fuel cell control system, an input / output means 23 configured with a touch panel, keyboard, mouse, or the like, a local wireless communication interface 24 that enables communication with the control unit 51 on the work vehicle 10, and a global wireless interface 26 that enables communication via network 1.

[0059] The control unit 21 includes a start / stop command unit 21a that executes the start-up operation and the start-up stop operation of the fuel cell 5A, a start timer setting unit 21b that automatically executes the start-up operation after an arbitrarily set waiting time has elapsed, a stop timer setting unit 21c that automatically executes the start-up stop operation after an arbitrarily set waiting time has elapsed, and a schedule setting unit 21d for remotely steering the setting operation of the target time.

[0060] The start-up / shut-down command unit 21a is configured to be able to perform a start-up (initiation) operation of the fuel cell 5A via the input / output means 23 of the user terminal 20, and when a start-up operation is detected, it transmits a notification to the control device 50 to cause the control device 50 to execute the start-up process of the fuel cell 5A via the start-up control unit 50d. Similarly, the start-up / shut-down command unit 21a is configured to be able to perform a start-up / shut-down operation of the fuel cell 5A via the input / output means 23 of the user terminal 20, and when a start-up / shut-down operation is detected, it transmits a notification to the control device 50 to cause the control device 50 to execute the start-up / shut-down and cooling process of the fuel cell 5A via the shutdown control unit 50f. This allows an operator to remotely control the start-up operation and start-up / shut-down operation of the fuel cell 5A using the user terminal 20.

[0061] The schedule setting unit 21d is configured to be able to perform a setting operation for the target start time and a setting operation for the target end time using the input / output means 23 of the user terminal 20. When a target time setting operation is performed using the user terminal 20, the information is transmitted to the corresponding work vehicle 10, and setting of the target time by remote operation can be completed.

[0062] 6 is a block diagram of the information processing server 30. The information processing server 30 includes the control unit 31, which is configured with a CPU, RAM, or the like and is capable of performing various processes by executing various programs, a storage device 32, which stores various information and constitutes part of the storage device of the fuel cell control system, and a global wireless interface 33, which enables wireless communication via a network.

[0063] The control unit 31 includes an information processing unit 31a that processes the information contained in the work plan and links it to the work vehicle 10, an information management unit 31b that manages the information of the created work plan, and a work plan creation unit 31c that creates the work plan based on the input information.

[0064] The storage device 32 includes a user information storage unit 32a that stores information about the worker who created the work plan, and a work plan storage unit 32b that stores the work plan created by the worker.

[0065] The work plan creation unit 31c is configured to be able to create a work plan that includes the date on which the work drive will be carried out, the target start time, the target end time, information that identifies the target work vehicle 10, and location information regarding the waiting location (location where warm-up work will be carried out) of the work vehicle 10. This information can be input through the input / output means of the user terminal 20, as well as through the touch panel 16 on the work vehicle 10, or input means such as a keyboard or touch panel connected to the information processing server 30.

[0066] The control unit 31 (information processing unit 31a) can link the work plan with the startup schedule of the fuel cell 5A by appropriately transmitting the target time included in the work plan to the corresponding work vehicle 10.

[0067] In the above-described embodiment, an information processing server (farming server) is provided to create, record, and manage the work plan, but these functions may also be installed in the control device 50 on the work vehicle 10 side or on the user terminal 20 side. [Explanation of symbols]

[0068] 3 Running body 5B Temperature Sensor 7 Means of supply 9 GNSS sensor (location information acquisition device) 11 Battery 13 Electric motor (motor) 20 User terminal (information terminal) 23 Input / output means (operation means) 31c Work plan creation unit (work plan creation means) 51d Start control unit (control unit)

Claims

1. A fuel cell mounted on the running body, a motor driven by the fuel cell; a temperature sensor for detecting the temperature of the fuel cell; a control unit that controls the start and end of startup of the fuel cell; the control unit is configured to be able to execute preparatory control for automatically starting the fuel cell in advance to perform warm-up work so that the fuel cell reaches an operating temperature at which it operates efficiently by setting a target time in advance, a position information acquisition device for acquiring the coordinate position of the traveling machine body; The control unit is configured to execute the preparatory control when the position information acquisition device detects that the traveling machine body is at a predetermined position. Work vehicle.

2. a mobile terminal capable of communicating with the control unit; The mobile terminal has an operation means for operating the setting of the target time. The work vehicle according to claim 1 .

3. a work plan creation means for creating a work plan including a start time of the farm work; The control unit is configured to automatically perform pre-warming work in accordance with the start time of the agricultural work recorded in the work plan. The work vehicle according to claim 1 .

4. A supply means is provided for supplying the power generated by the fuel cell or the heat discharged from the fuel cell to the outside. The work vehicle according to claim 1 .

5. a battery mounted on the traveling vehicle body and charged by a fuel cell; The control unit is configured to, when terminating the start-up of the fuel cell, execute the start-up termination of the fuel cell after detecting that the battery is charged to a predetermined level or more. The work vehicle according to claim 1 .

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