Electric work vehicle

Abstract

The electric work vehicle is provided with: a control state switching unit (35) that switches the control unit to an operating state in response to a first operation on the manual operation device, and switches the control unit to a resting state in response to a second operation on the manual operation device; and a charging control unit (43) that controls the charging of the battery. The control unit is provided with: a motor control unit (61) for controlling the driving of the electric motor (1); a mode setting unit (62) that sets a charging mode in which the battery can be charged and an operation mode in which the electric motor (1) can be driven; a start-up prohibiting unit (63) that prohibits start-up of the electric motor (1) after completion of charging; and an activation prohibition release unit (64) that releases activation prohibition.

Description

Technical Field

[0001] The present invention relates to an electric working vehicle driven by the power of an electric motor powered by a rechargeable battery. Background Art

[0002] In such an electric working vehicle, for example, as described in Patent Document 1, when the power of the battery is consumed, the battery is connected to an external power supply device via a connection port, and the battery is charged with power from the power supply device. Since it takes more than one hour to charge the battery, the driver (manager) may leave the charging place during charging, and in this case, the electric working vehicle may be stolen.

[0003] Plug-in vehicles are usually parked at charging stations set up along roads to charge their batteries. For example, in the plug-in vehicle management system described in Patent Document 2, an intrusion sensor and a camera are provided on the plug-in vehicle, and an image monitor is provided at the charging station. When the intrusion sensor detects illegal operation of the plug-in vehicle, the image captured by the camera is displayed on the image monitor. This can improve the safety of the battery when it is charged at the charging station.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2021-000957

[0007] Patent document 2: Japanese Patent Application Publication No. 2010-182239. Summary of the invention

[0008] Problem that the invention aims to solve

[0009] Charging stations that can be used by electric work vehicles are not very popular. In addition, if lighting is required for nighttime photography, there are environmental and cost issues when installing anti-theft cameras on electric work vehicles that work during charging. In view of such actual conditions, an electric work vehicle that can more effectively enhance the safety of anti-theft during battery charging is desired.

[0010] Means used to solve problems

[0011] The electric working vehicle of the present invention is driven by the power of an electric motor powered by a rechargeable battery, wherein the electric working vehicle comprises: a control unit for controlling the electric working vehicle; a control state switching unit for switching the control unit to an operating state in response to a first operation (e.g., an opening operation) on a manually operated device, and switching the control unit to a dormant state in response to a second operation (e.g., a closing operation) on the manually operated device; a charging power connection unit for receiving charging power for the battery; and a charging control unit for controlling the charging of the battery by the charging power, wherein the control unit comprises: a motor control unit for controlling the driving of the electric motor; a mode setting unit for setting a charging mode for charging the battery and an operating mode for driving the electric motor; a start prohibition unit for prohibiting the starting of the electric motor after charging is completed; and a start prohibition release unit for releasing the start prohibition of the electric motor.

[0012] According to this configuration, even if charging of the battery is completed, activation of the electric motor is prohibited by the activation prohibition unit, and therefore the electric motor will not be activated unless the activation prohibition is released.

[0013] Therefore, there is no problem that the electric working vehicle after battery charging is driven away by a third party.

[0014] The start prohibition of the electric motor by the start prohibition unit must be lifted by a regular driver (manager) of the electric working vehicle. For a regular driver of the electric working vehicle, the release operation is preferably as simple as possible. Therefore, in the present invention, the start prohibition of the start prohibition unit is lifted by performing the first operation on the manual operation device. In addition, it is convenient if the manual operation device is also used as an operation key required for actions such as enabling the electric working vehicle to be boarded (opening the door, etc.).

[0015] In one embodiment, when the charging mode is set, a charging start instruction is issued by operating the manual operation device to start charging. In such an embodiment, if the charging of the battery does not start even if the charging start instruction is issued, it is considered that some abnormality has occurred. Therefore, in this case, it is preferred to cut off the power supply of the control unit. Therefore, in one embodiment, if the charging of the battery does not start within a specified time (for example, within one minute) after the charging start instruction is issued in the charging mode, the power supply of the control unit is cut off.

[0016] When the battery is charged, while the second operation state (off state) using the manual operation device is maintained, the operation of the control system is deemed unnecessary for at least a period of time, so from the perspective of energy saving and theft prevention, it is preferred to cut off the power supply of the control unit. Therefore, in the present invention, after the battery is charged, while the second operation state using the manual operation device is maintained, the power supply of the control unit is cut off.

[0017] In addition, if the control system is in an operating state when the battery is charged, it is preferable to maintain this state for a period of time, and to cut off the power supply of the control unit after a predetermined time has passed, because the control system may need to be operated immediately. Therefore, in the present invention, after the battery is charged, while the state (open state) in which the first operation of the manual operation device is maintained, the power supply of the control unit is cut off after a predetermined time has passed (for example, one minute).

[0018] In the operation mode that enables the electric working vehicle to travel, even if a motor start command is issued to the electric motor using a manual operating device so that the control system of the control unit can perform travel control, there are still cases where the electric motor does not enter a startable state. In such a case, it is considered that there is a problem with the control unit, etc. Therefore, in order to avoid adverse conditions caused by such problems, in the present invention, after the motor start command is issued in the operation mode, if the electric motor does not enter the start state, the power supply of the control unit is cut off after a specified standby time.

[0019] When the electric motor stops due to a fault, it is necessary to prevent the control system with the control unit as the core from being damaged. Therefore, in the present invention, when the electric motor stops due to a fault, the power supply of the control unit is cut off.

[0020] As a preferred embodiment of the present invention, the control unit stops the electric motor in response to the connection of the power supply line from the power supply device to the charging power connection unit, thereby avoiding the problem of the electric motor accidentally operating during the battery charging process.

[0021] In order to charge the battery after the power supply line is connected to the charging power connection unit, a charging mode needs to be set. The setting of the charging mode is preferably performed by an operation that the driver is aware of. Therefore, in one embodiment of the present invention, the charging mode is set by charging the charging power connection unit and causing the manual operation device to perform the first operation from the state of the second operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is the left side view of the tractor.

[0023] Figure 2 This is a left side view showing the arrangement of the motor and the driving battery.

[0024] Figure 3 It is a schematic diagram showing the flow of power transmission.

[0025] Figure 4 This is a functional block diagram showing the functional parts of the battery system.

[0026] Figure 5 This is a flowchart showing an example of a control flow in the control system. DETAILED DESCRIPTION

[0027] The mode for implementing the present invention will be described with reference to the drawings. In the following description, unless otherwise specified, the direction of arrow F in the drawings is referred to as "front", the direction of arrow B is referred to as "rear", the direction of arrow L is referred to as "left", and the direction of arrow R is referred to as "right". The direction of arrow U in the drawings is referred to as "up", and the direction of arrow D is referred to as "down".

[0028] (Overall structure of the tractor)

[0029] Hereinafter, a tractor as an example of the electric working vehicle of the present invention will be described. Figure 1 As shown, the tractor includes left and right front wheels 10 , left and right rear wheels 11 , and a cover member 12 .

[0030] The tractor includes a machine frame 2 and a driving section 3. The machine frame 2 is supported by left and right front wheels 10 and left and right rear wheels 11. A cover member 12 is disposed at the front of the machine body. The driving section 3 is disposed behind the cover member 12.

[0031] The driving unit 3 includes a protection frame 30, a driver's seat 31, and a steering wheel 32. The steering wheel 32 can be operated by a driver who rides on the driving unit 3 and sits on the driver's seat 31. By operating the steering wheel 32, the left and right front wheels 10 are steered. A front panel 13 is provided in front of the driver's seat 31, and a part of the front panel 13 is formed as an instrument panel 13a. A display unit 70 for notifying the driver of various information is assembled in the instrument panel 13a. The driver can perform various driving operations on the driving unit 3.

[0032] The tractor has a battery 4 as a driving battery. The cover member 12 can be opened and closed and swung around an opening and closing axis Q along the left and right direction of the machine body. When the cover member 12 is in a closed state, the battery 4 is covered by the cover member 12. A charging cover 12a is provided on the left side of the front part of the cover member 12 so as to be swingable and openable. By opening the charging cover 12a, a charging power connection portion 44 into which a power supply cable is inserted is exposed during charging.

[0033] like Figure 2 As shown, the tractor includes an inverter 14 and an electric motor 1. The battery 4 supplies power to the inverter 14. The inverter 14 converts DC power from the battery 4 into AC power to generate driving power supplied to the electric motor 1. The driving power is AC power generated by the inverter 14.

[0034] like Figure 2 and Figure 3 As shown, the tractor has a hydrostatic continuously variable transmission 15 and a transmission 16. Figure 3 As shown, the hydrostatic continuously variable transmission 15 includes a hydraulic pump 15a and a hydraulic motor 15b.

[0035] The hydraulic pump 15a is driven by the rotational power from the electric motor 1. The hydraulic pump 15a is driven, and the rotational power is output from the hydraulic motor 15b. The hydrostatic continuously variable transmission 15 is configured to steplessly change the speed of the rotational power between the hydraulic pump 15a and the hydraulic motor 15b.

[0036] The rotational power output from the hydraulic motor 15 b is transmitted to the transmission 16 .

[0037] The rotational power transmitted to the transmission 16 is distributed to the left and right front wheels 10 and the left and right rear wheels 11 after being speed-changed by the gear-type transmission mechanism of the transmission 16. Thus, the left and right front wheels 10 and the left and right rear wheels 11 are driven.

[0038] like Figure 3 As shown, the tractor has an intermediate PTO shaft 17 and a rear PTO shaft 18. The rotational power output from the electric motor 1 is distributed to the hydraulic pump 15a, the intermediate PTO shaft 17, and the rear PTO shaft 18. As a result, the intermediate PTO shaft 17 and the rear PTO shaft 18 are rotated.

[0039] If the working device is connected to the intermediate PTO shaft 17 or the rear PTO shaft 18 , the working device is driven by the rotational power of the intermediate PTO shaft 17 or the rear PTO shaft 18 .

[0040] For example, Figure 2 As shown, in this embodiment, the mowing device 19 is connected to the intermediate PTO shaft 17. The mowing device 19 is driven by the rotational power of the intermediate PTO shaft 17.

[0041] 〔Structure of motor and battery control system〕

[0042] Figure 4The structure related to the control of the battery 4 and the electric motor 1 is schematically shown. The motor and battery control system includes an accelerator device 33, a key device 34, a control unit 6, and an inverter 14. The control unit 6 controls the operation of the electric motor 1. The accelerator device 33 is provided near the steering wheel 32. Although the structure of the accelerator device 33 is not shown, the accelerator device 33 includes a swingable lever and a potentiometer operated by the swinging operation of the lever. The accelerator device 33 is connected to the control unit 6.

[0043] The key device 34 is also connected to the control unit 6. The key device 34 is provided on the front panel 13, and performs an opening (ON) operation and a closing (OFF) operation on the control unit 6. In this embodiment, the key device 34 is composed of a control state switching unit 35 and a portable operation key 36. An insertion unit 35a for inserting and installing the operation key 36 and a push-button switch 35b that can be manually pressed are attached to the control state switching unit 35. The operation key 36 and the switch 35b function as a manual operation device of the present invention. In this embodiment, the pressing operation of the switch 35b in the state where the operation key 36 has been inserted and installed in the insertion unit 35a is regarded as the first operation (opening operation) of the manual operation device. Furthermore, the further pressing operation of the switch 35b in the state where the operation key 36 has been inserted and installed in the insertion unit 35a is regarded as the second operation (closing operation) of the manual operation device. In response to the first operation of the manual operation device, the control state switching unit 35 sends a switching signal to the control unit 6 to switch the control unit 6 to the working state (power-on state: open state). In response to the second operation on the manual operation device, the control state switching unit 35 sends a switching signal to the control unit 6 to switch the control unit 6 to the dormant state (power off state: off state). In addition, like a general vehicle key, the operation key 36 functions as a key that can only be recognized by the work vehicle.

[0044] The control unit 6 is also connected to the inverter 14, and provides a driving command to the inverter 14 according to the command of the accelerator device 33. The inverter 14 adjusts the power supplied from the battery 4 to the electric motor 1 according to the command of the control unit 6, and controls the output of the electric motor 1.

[0045] The control unit 6 is also connected to the display control unit 7. The display control unit 7 notifies the driver of information such as the driving status, working status, battery information (charge level or temperature) and the like through a display unit 70, a lamp, a buzzer, etc. assembled in the instrument panel 13a.

[0046] The battery 4 is charged by the charging control unit 43 from the power supply device 45 connected to the charging power connection unit 44. The charging power connection unit 44 is provided with a power supply socket, and the power supply socket is connected to the power supply connector of the charging cable from the power supply device 45 during charging.

[0047] The battery 4 is, for example, a lithium-ion battery, and is formed by stacking a plurality of battery cells 40, which are small unit batteries of low voltage. The battery state detection unit 5 for detecting the battery state includes a battery voltage detector 51 and a battery temperature detection unit 52. The battery voltage detector 51 can detect the voltage of the connection point between the plurality of battery cells 40 connected in series as a cell voltage. The detection signals of the battery voltage detector 51 and the battery temperature detection unit 52 are sent to the control unit 6.

[0048] In addition to the battery 4, the tractor also has an electric component battery 41 that supplies power to the control unit 6 and other electric components. The electric component battery 41 supplies low voltage (12 volt) power to drive the electric components. The electric component battery 41 is charged by power supplied from the battery 4 via a DC / DC converter 42. The DC / DC converter 42 is driven and controlled by the control unit 6.

[0049] As functional elements particularly relevant to the present invention, the control unit 6 includes a battery management unit 60 , a motor control unit 61 , a mode setting unit 62 , a start prohibition unit 63 , and a start prohibition release unit 64 .

[0050] The control unit 6 can be set to a charging mode in which the battery 4 can be charged and an operating mode in which the electric motor 1 can be driven. The setting of these two modes is performed by the mode setting unit 62 .

[0051] The start prohibition unit 63 prohibits the start of the electric motor 1. The start prohibition release unit 64 releases the start prohibition of the electric motor 1 by the start prohibition unit 63. For example, as one of the use examples of the start prohibition of the electric motor, after the charging of the battery 4 is completed, the start prohibition unit 63 prohibits the start of the electric motor 1. As a result, after the charging is completed, the electric motor 1 will not start unless a certain specific operation is performed, so that the tractor that has completed the charging can be prevented from being stolen. In addition, as one of the other use examples, when it is detected that the power supply connector of the charging cable from the power supply device 45 is inserted into the power supply socket of the charging power connection unit 44, the start prohibition unit 63 prohibits the start of the electric motor 1. As a result, the electric motor 1 is not started in the state where the power supply connector of the charging cable is inserted into the charging power connection unit 44. In any case, the start prohibition release unit 64 that receives the confirmation signal cancels the start prohibition of the electric motor 1 by the start prohibition unit 63, and the confirmation signal is a confirmation signal of the operation performed by the driver (manager) using the manual operation device, for example, a confirmation signal of the execution of the first operation.

[0052] The battery management unit 60 manages the charging and discharging of the battery 4 based on the cell voltage, the total inverter voltage, the converter input voltage, the signal from the key device 34, and the like. For example, if it is detected that the power supply connector of the charging cable from the power supply device 45 is inserted into the power supply socket of the charging power connection unit 44, and it is detected that the manual operation device has been operated from the second operation state to the first operation, then the mode setting unit 62 sets the control unit 6 to the charging mode. More specifically, when the power supply connector of the charging cable is inserted into the charging power connection unit 44, the control unit 6 enters the charging standby state. In this charging standby state, if the control state switching unit 35 sends a switching signal (a first operation that functions as a charging start instruction) to the control unit 6 by the operation of the key device 34, the control unit 6 enters the charging mode, executes the charging program of the charging control unit 43, and starts the charging process of the battery 4. When the charging process of the battery 4 is completed, when the control state switching unit 35 sends a switching signal (a second operation) to switch the control unit 6 to the rest state to the control unit 6, the power is cut off and the control unit 6 enters the rest state. During the charging process, if the first operation using the manual operation device is performed, the control unit 6 enters the charging standby state, and the charging process is interrupted.

[0053] In this embodiment, in a state where the charging cable is inserted into the charging power connection part 44, for example, by performing a first operation using a manual operation device, the control unit 6 is switched from the dormant state to the active state, a charge start command is issued, and charging is started. At this time, if charging of the battery 4 does not start even after the first operation using the manual operation device is performed for charging, it is considered that some kind of abnormality has occurred. In order to avoid secondary problems caused by the occurrence of such an abnormality, even if a charge start command is issued, if charging of the battery 4 does not start within a specified time after the first operation, the control unit 6 can be switched to the dormant state and the power supply of the control unit 6 can be cut off. In addition, as an operation to start charging, other operation methods or other operation devices can also be used.

[0054] The motor control unit 61 controls the driving of the electric motor 1 . Specifically, the motor control unit 61 generates a driving signal for driving the electric motor 1 based on a signal from the accelerator device 33 , and transmits the driving signal to the inverter 14 .

[0055] In the control system including the control unit 6 mounted on the tractor, various control processes related to battery charging and electric motor control can be executed. Such control processes are listed below.

[0056] (1) When charging of the battery 4 is completed, if the second operation state (off state) using the manual operation device is maintained, the power supply of the control unit 6 is turned off.

[0057] (2) When the charging of the battery 4 is completed, if the first operation state (open state) using the manual operation device is maintained, the power supply of the control unit 6 is turned off (closed state) after a predetermined time has passed.

[0058] (3) In the working mode in which travel control is possible, if the electric motor 1 does not enter the started state even if a motor start command is issued, the power supply of the control unit 6 is turned off after a predetermined waiting time (for example, five seconds).

[0059] (4) When the electric motor stops due to a fault, the power supply of the control unit 6 is cut off so as not to affect the control system with the control unit 6 as the core.

[0060] (5) In response to the connection of the power supply line from the power supply device 45 to the charging power connection unit 44, not only is the start prohibited, but the electric motor 1 is also stopped if it is in the operating state. In addition, the start prohibition of the electric motor 1 and the stop state of the electric motor 1 can also be handled equally.

[0061] (6) When the battery state deteriorates, such as when the battery voltage drops or the battery temperature rises, the output of the electric motor 1 is limited to a preset limited output value.

[0062] Next, use Figure 5 The flowchart shown in FIG. 1 illustrates an example of the control flow in the control unit 6. In the flowchart, the control unit 6 is divided into a rest state in which the power is cut off and an operating state in which the power is connected. Furthermore, the operating state is divided into a working mode in which the tractor can travel and a charging mode in which the battery 4 can be charged.

[0063] By turning on the key device 34, the tractor parked in the rest state is changed to the working state (#a). The turning on the key device 34 triggers the control of the control unit 6 to perform the initial processing of various functions (#b). When the initial processing is completed, it is determined whether the charging connection is not being made (no charging connection) or the charging connection is being made (charging connection).

[0064] In the absence of a charging connection (#c1), the tractor enters the working mode and stands by. If a motor start command (#d) is issued, it is checked whether the motor is in the started state or the motor is not started. If it is in the motor started state (#d1), the tractor enters the driving state (including temporary parking) (#e). In the driving state of the tractor, if the closing operation of the key device 34 and the charging connection (#e1) are detected, and a major fault including battery malfunction occurs (#e2), the parking process (parking process) (#f) is performed. If the parking process is completed (#g), the power supply to the control unit 6 is cut off, the tractor enters the dormant state, and the tractor enters the parking state. Although the motor start command (#d) has been issued, if the motor start state (#d2) has not been entered after a specified time, it is changed to the parking process (parking process) (#f) and becomes the dormant state.

[0065] After the initial processing (#b) is completed, if the charging cable from the power supply device 45 is connected to the charging power connection unit 44, the charging standby state (#h) is entered. In the charging standby state, if the key device 34 is opened from the closed state, a charging start command (#i1) is issued to enter the charging mode. That is, after the charging cable from the power supply device 45 is connected to the charging power connection unit 44, in order to enter the charging mode, the key device 34 needs to be operated from the closed operation to the open operation.

[0066] If the mode is changed to the charging mode, the charging control unit 43 performs the charging process of the battery 4 (#j). During the charging process, the control unit 6 is connected to the power supply. If the charging process is completed, the start prohibition unit 63 prohibits the start of the electric motor 1 (#l). At the moment of the end of the charging process, if the operation state of the key device 34 is the closed operation state (#m1), the power supply to the control unit 6 is cut off, the control unit 6 becomes a dormant state, and the tractor becomes a parked state. At the moment of the end of the charging process, if the operation state of the key device 34 is the open operation state (#m2), after a predetermined time (for example, one minute later) (#m3), the operation state of the key device 34 is forcibly changed to the closed operation state (#m4). As a result, the power supply to the control unit 6 is cut off, the control unit 6 becomes a dormant state, and the tractor becomes a parked state.

[0067] If charging does not start even though a charge start command is issued (#k), the power supply to the control unit 6 is cut off after a predetermined time has passed (#n), the control unit 6 enters a dormant state, and the tractor enters a parked state.

[0068] In the charging standby state, if the key device 34 is in the closed operation state and the state of no charging connection without connecting the charging cable continues for a specified time (for example, five seconds) (#i2), the charging mode is not switched to the charging mode, the power supply to the control unit 6 is cut off, the state becomes dormant, and the tractor becomes parked.

[0069] In addition, when the charging cable from the power supply device 45 is connected to the charging power connection unit 44, if the electric motor 1 is in the driving state, the control unit 6 makes the electric motor 1 stop (non-driving state), but at this time, the start prohibition unit 63 also plays a role and can prohibit the start of the electric motor 1. Of course, the start prohibition unit 63 can also perform the transition of the electric motor 1 to the stop state (non-driving state) and the prohibition of the start of the electric motor 1. The stop and prohibition of the start of the electric motor 1 can be achieved by stopping the power supply to the electric motor 1, but can also be achieved by stopping the inverter 14.

[0070] [Other embodiments]

[0071] (1) In the above embodiment, the manual operation device of the key device 34 is composed of the operation key 36 that can be inserted and installed in the insertion portion 35a and the switch 35b, but instead of this structure, the manual operation device can perform the opening operation or the closing operation by wireless communication. The structure of the key device 34 is flexible.

[0072] (2) Figure 4 Each functional block in the functional block diagram shown may be divided into a plurality of blocks, or a plurality of functional blocks may be combined.

[0073] In addition, the structure disclosed in the above-mentioned embodiment (including other embodiments, the same below) can be used in combination with the structure disclosed in other embodiments as long as no contradiction occurs. In addition, the embodiments disclosed in this specification are examples, and the embodiments of the present invention are not limited to these and can be appropriately changed within the scope of the purpose of the present invention.

[0074] Industrial Application Possibility

[0075] The present invention is not limited to application to tractors, but can also be applied to various electric working vehicles such as rice transplanters, combine harvesters, and construction machinery.

[0076] Description of Reference Numerals

[0077] 1: Electric motor

[0078] 2: Body frame

[0079] 3: Driving Department

[0080] 4: Battery

[0081] 5: Battery status detection unit

[0082] 6: Control unit

[0083] 7: Display control unit

[0084] 10: Front wheel

[0085] 11: Rear wheel

[0086] 12: Cover member

[0087] 13: Front panel

[0088] 13a: Instrument panel

[0089] 14: Inverter

[0090] 15: Hydrostatic continuously variable transmission

[0091] 15a: Hydraulic pump

[0092] 15b: Hydraulic motor

[0093] 16: Transmission

[0094] 17: Intermediate PTO shaft

[0095] 18: Rear PTO shaft

[0096] 19: Mowing device

[0097] 30: Protection frame

[0098] 31: Driving Seat

[0099] 32: Steering Wheel

[0100] 33: Accelerator device

[0101] 34: Key device

[0102] 35: Control state switching unit

[0103] 35a: Insertion

[0104] 35b: Switch

[0105] 36: Operation key

[0106] 40: Battery Cell

[0107] 41: Batteries for electrical components

[0108] 42: DC / DC converter

[0109] 43: Charging control unit

[0110] 44: Charging power connection

[0111] 45: Power supply device

[0112] 51: Battery voltage detector

[0113] 52: Battery temperature detection unit

[0114] 60: Battery Management Department

[0115] 61: Motor control unit

[0116] 62: Mode setting unit

[0117] 63: Start prohibition department

[0118] 64: Start prohibition release department

[0119] 70: Display unit

Claims

1. An electric working vehicle, driven by an electric motor powered by a rechargeable battery, wherein: The electric working vehicle has: A control unit, controlling the electric working vehicle; a control state switching unit, which switches the control unit to an operating state in response to a first operation on the manual operation device, and switches the control unit to a dormant state in response to a second operation on the manual operation device; a charging power connection unit for receiving charging power for the battery; as well as a charging control unit that controls charging of the battery by the charging power, The control unit has: a motor control unit for controlling the driving of the electric motor; a mode setting unit for setting a charging mode for charging the battery and an operation mode for driving the electric motor; a start prohibiting unit for prohibiting the start of the electric motor after charging is completed; as well as The start inhibition canceling unit cancels the start inhibition of the electric motor.

2. The electric working vehicle according to claim 1, wherein: The activation prohibition performed by the activation prohibition unit is released by performing the first operation on the manual operation device.

3. The electric working vehicle according to claim 1 or 2, wherein: If charging of the battery is not started within a predetermined time after a charge start command is issued in the charge mode, power to the control unit is turned off.

4. The electric working vehicle according to any one of claims 1 to 3, wherein: When the second operation using the manual operation device is maintained after the charging of the battery is completed, the power supply of the control unit is turned off.

5. The electric working vehicle according to any one of claims 1 to 4, wherein: If the first operation using the manual operation device is maintained after the battery is charged, the power supply of the control unit is turned off after a predetermined time has elapsed.

6. The electric working vehicle according to any one of claims 1 to 5, wherein: When the electric motor does not enter the activated state after a motor activation command is issued in the operation mode, the power supply of the control unit is turned off after a predetermined standby time.

7. The electric working vehicle according to any one of claims 1 to 6, wherein: When the electric motor stops due to a fault, the power supply to the control unit is cut off.

8. The electric working vehicle according to any one of claims 1 to 7, wherein: The control unit stops the electric motor in response to a connection between a power supply line from a power supply device and the charging power connection unit.

9. The electric working vehicle according to any one of claims 1 to 8, wherein: The charging power connection portion is connected by charging, and the first operation is performed on the manual operation device from the state of the second operation, thereby setting the charging mode.

Images