Portable power feeding vehicle

Abstract

To provide a portable power feeding vehicle which eliminates an operation burden and enables quick charge.SOLUTION: A portable power feeding vehicle 1 includes: a vehicle body 2 which may be connected to a work vehicle 100 and towed by the work vehicle 100; wheels 3 supporting the vehicle body 2; a battery unit provided at the vehicle body 2; and power feeding ports 17 for feeding electric power from the battery unit to an object vehicle at the outside.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a portable power supply vehicle.

Background Art

[0002] The charging system disclosed in Patent Document 1 includes a power supply vehicle and a charging vehicle, and the power supply vehicle and the charging vehicle are connected by a charging cable, and power can be supplied from the power supply vehicle to the charging vehicle to charge the charging vehicle.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the charging system of Patent Document 1, when charging the charging vehicle, it is necessary to drive the power supply vehicle and move it to the location of the charging vehicle, which not only imposes an operating burden but also has the problem that charging cannot be started quickly.

[0005] The present invention has been made to solve such problems of the prior art, and an object thereof is to provide a portable power supply vehicle that has no operating burden and can charge quickly.

Means for Solving the Problems

[0006] A portable power supply vehicle according to an aspect of the present invention includes a vehicle body that can be connected to a work vehicle and can be towed by the work vehicle, wheels that support the vehicle body, a battery unit provided on the vehicle body, and a power supply port for supplying power from the battery unit to an external target vehicle.

Effects of the Invention

[0007] According to the above-mentioned portable power supply vehicle, there is no driving burden and it can be charged quickly.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6A

Figure 6B

Figure 7A

Figure 7B

Figure 8

Modes for Carrying Out the Invention

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of the portable power supply vehicle being towed by a work vehicle. FIG. 2 is a front perspective view of the portable power supply vehicle. FIG. 3 is a rear perspective view of the portable power supply vehicle. As shown in FIG. 1, the portable power supply vehicle 1 is a portable power supply vehicle used for charging a work vehicle 100 such as a tractor.

[0010] Note that the work vehicle 100 may be, for example, an electric vehicle of the electric type, and is not limited to an electric tractor. For example, the work vehicle 100 may be a backhoe equipped with a mounting portion 110 to which a work device 130 can be mounted, an electric construction machine such as a wheel loader, an electric agricultural machine such as a combine or a rice transplanter, or various electric vehicles, etc.

[0011] In the embodiment of the present invention, in the directions of the arrows Y1 in FIGS. 1 to 3, it is the front, in the directions of the arrows Y2 in FIGS. 1 to 3, it is the rear, on the front side in FIG. 1, and in the directions of the arrows X1 in FIGS. 2 and 3, it is the left side, and on the back side in FIG. 1, and in the directions of the arrows X2 in FIGS. 2 and 3, it is the right side. Also, the horizontal direction, which is the direction orthogonal to the front-rear direction of the portable power supply vehicle 1, is the width direction. Also, the direction from the central portion in the width direction toward the right or the left is the outer side in the width direction. The direction opposite to the outer side in the width direction is the inner side in the width direction.

[0012] As shown in FIGS. 2 and 3, the portable power supply vehicle 1 includes a vehicle body 2 that can be connected to the work vehicle 100 and can be towed by the work vehicle 100, and wheels 3 that support the vehicle body 2.

[0013] As shown in FIGS. 1 to 3, the vehicle body 2 has a connecting portion 4 that can be connected to the mounting portion 110 of the work vehicle 100. By connecting the mounting portion 110 of the work vehicle 100 to the connecting portion 4 (see FIG. 1), the portable power supply vehicle 1 can be towed at the rear portion of the work vehicle 100.

[0014] FIG. 4 is a side view of a work vehicle equipped with a work device. The mounting portion 110 of the work vehicle 100 shown in FIG. 4 will be described. The mounting portion 110 is a device to which the work device 130 can be mounted, and connects the work device 130 to the rear portion of the work vehicle 100. This mounting portion 110 is composed of a swing drawbar, a three-point link mechanism, etc. that do not perform the raising and lowering of the work device 130, and a lifting device, etc. that performs the raising and lowering of the work device 130. By connecting the work device 130 to the mounting portion 110, the work vehicle 100 can tow the work device 130.

[0015] The working device 130 is a device that is mounted on the mounting part 110 and performs predetermined work. The working device 130 includes a tilling device for tilling, a transplanting device for planting seedlings, a cutting device for cutting forage grass, etc., a spreading device for spreading forage grass, etc., a grass collecting device for collecting forage grass, etc., a forming device for forming forage grass, etc., a fertilizer application device (broadcaster), a pesticide spraying device for spraying pesticides, an irrigation spraying device for performing irrigation, and the like.

[0016] Also, as shown in FIG. 4, the work vehicle 100 is an electric tractor, and for example, a charging port 120 is provided at a predetermined position on the right side surface.

[0017] The portable power supply vehicle 1 is towed by the work vehicle 100 and is placed near the work location of the work vehicle 100 (for example, a field if it is a tractor agricultural machine, a construction site if it is a construction machine, etc.) by releasing the connection with the work vehicle 100. And the portable power supply vehicle 1 can supply power to the work vehicle 100, that is, charge the work vehicle 100.

[0018] Also, the portable power supply vehicle 1 is configured to be able to travel in a state where it is not towed by the work vehicle 100 (that is, a non-towed state). FIG. 5 is a diagram for explaining the system of the portable power supply vehicle.

[0019] As shown in FIGS. 2 to 5, the portable power supply vehicle 1 includes a traveling device 5 that supports the vehicle body 2 so as to be able to travel. The traveling device 5 is, for example, a wheel-type traveling device provided on the vehicle body 2 and having front wheels 31 on the front left and front right of the vehicle body 2 and rear wheels 32 on the rear left and rear right of the vehicle body 2.

[0020] Note that the traveling device 5 may be a crawler traveling device (endless track traveling device). For example, the crawler traveling device (endless track traveling device) may be a plurality of crawler traveling devices (endless track traveling devices) provided on the vehicle body 2, having crawlers, and circulatingly driving the crawlers.

[0021] Also, as shown in FIG. 5, the portable power supply vehicle 1 is provided with a drive device 6. The drive device 6 includes a prime mover 7 and a transmission 8, and is a device that drives the vehicle body 2 in a state where it is not towed by the work vehicle 100 (that is, in a non-towed state), and applies a driving force to the vehicle body 2 by driving the running device 5. For example, at least one of the front wheels 31 and the rear wheels 32 is a drive wheel that rotates when the power output from the transmission 8 is transmitted thereto.

[0022] The prime mover 7 is an electric motor 7a, a diesel engine, or the like. In the present embodiment, the prime mover 7 is an electric motor 7a that is driven by the electric power stored in the battery unit 10 provided in the vehicle body 2.

[0023] The transmission 8 can switch the driving force of the running device 5 by shifting gears and can switch the forward and reverse of the running device 5 in the non-towed state.

[0024] As shown in FIGS. 2 and 3, the vehicle body 2 has an exterior body 9, and the exterior body 9 houses devices provided in the vehicle body 2 (for example, the prime mover 7, the battery unit 10, etc.). As shown in FIGS. 2 and 3, the exterior body 9 extends from the front part to the rear part of the vehicle body 2, and houses the prime mover 7 and the battery unit 10 in a space (accommodation space) formed inside. The exterior body 9 has a front wall 9a that forms the front part of the accommodation space, a rear wall 9b that forms the rear part of the accommodation space, a pair of side walls 9c that form the side parts of the accommodation space, and an upper wall 9d that forms the upper part of the accommodation space.

[0025] The front wall 9a is disposed at the front portion of the vehicle body 2, and for example, a headlamp 12 is provided thereon. The rear wall 9b is disposed at the rear portion of the vehicle body 2 and is spaced apart from the front wall 9a in the front-rear direction, and for example, a tail lamp 13 is provided thereon. Among the pair of side walls 9c, the left side wall 9c is disposed on the left side of the vehicle body 2 and connects the left end of the front wall 9a and the left end of the rear wall 9b. Among the pair of side walls 9c, the right side wall 9c is disposed on the right side of the vehicle body 2 and connects the right end of the front wall 9a and the right end of the rear wall 9b. For this reason, the pair of side walls 9c are disposed spaced apart in the width direction. The upper wall 9d extends from the front portion to the rear portion of the vehicle body 2 and is disposed upward. Further, the upper wall 9d connects the upper end of the front wall 9a, the upper end of the rear wall 9b, and the upper ends of the pair of side walls 9c.

[0026] Note that in the towing state, the drive device 6 stops the electric motor 7a and sets the transmission 8 to neutral. For this reason, the front wheels 31 and the rear wheels 32 of the portable power feeding vehicle 1 towed by the work vehicle 100 are driven.

[0027] As shown in FIG. 5, the portable power feeding vehicle 1 includes a control device 60. The control device 60 is a device composed of an electric / electronic circuit, a program stored in a CPU, etc., and controls various devices of the portable power feeding vehicle 1. The control device 60 has a storage unit 60a that stores programs and tables related to control. The storage unit 60a is a non-volatile memory or the like. The control device 60 controls each device of the portable power feeding vehicle 1 based on signals input from the outside and programs and tables stored in the storage unit 60a.

[0028] The control device 60 controls the drive device 6 and performs control related to the automatic driving of the vehicle body 2. For example, the control device 60 can control the rotation speed of the electric motor 7a, the vehicle speed of the traveling device 5, steering, switching between forward and reverse of the traveling device 5, etc. unmanned or autonomously.

[0029] As shown in FIG. 5, the portable power feeding vehicle 1 includes a battery unit 10 provided on the vehicle body 2.

[0030] Hereinafter, the battery unit 10 and the charging of the battery unit 10 will be described. The battery unit 10 is a structure that can store electricity and output the stored power. The battery unit 10 has a battery 10a inside a housing (case). The battery 10a can store electricity and is a secondary battery such as a lithium-ion battery or a lead-acid battery. The battery 10a has a plurality of cells inside, and the plurality of cells are electrically connected in series and in parallel. The battery unit 10 is connected to a charger 15 provided in the portable power supply vehicle 1.

[0031] As shown in FIG. 3, the charger 15 includes a charging port 15a to which a charging cable provided in an arm robot 210 of an external charging facility 200 (charging station) for charging the battery unit 10 is connected. The charging port 15a is provided on the front side or the rear side of the vehicle body 2 and is a socket (charging port) that is connected to an external charging facility 200 (charging station) to charge the battery unit 10.

[0032] Note that the charger 15 may include a non-contact charging unit 15b or a solar panel 15c instead of or in addition to the charging port 15a.

[0033] As shown in FIG. 5, the portable power supply vehicle 1 includes a display device 70 (charging display unit) that displays the charging state from the charging port 15a to the battery unit 10. The control device 60 controls the display of the display device 70 based on the state of the battery 10a.

[0034] Specifically, the control device 60 at least acquires information regarding the charging of the battery 10a from a state detection unit provided in the portable power supply vehicle 1. The state detection unit is composed of an electric and electronic circuit, a program, etc., and can detect the state regarding the charging of the battery 10a. In the present embodiment, the state detection unit is, for example, a BMU (battery management unit) 10a1 provided in the battery 10a and monitoring / controlling the battery 10a.

[0035] The BMU 10a1 acquires the voltage, temperature, current, terminal voltage of internal cells, etc. of the battery 10a, and calculates the remaining capacity of the battery 10a. For example, the BMU 10a1 detects the remaining capacity of the battery 10a using the terminal voltage of the internal cells of the battery 10a and a voltage measurement method. Note that the method for detecting the remaining capacity of the battery 10a is not limited to the voltage measurement method, and may be a method such as a Coulomb counter method, a battery cell modeling method, an impedance track method, etc.

[0036] Also, the BMU 10a1 can control the opening and closing of the relay inside the battery 10a, and can control the start and stop of the power supply of the battery 10a. In other words, it can acquire whether the battery 10a is in a charging state but not charging or in a discharging state. Thereby, the BMU 10a1 outputs information including the remaining capacity of the battery 10a and whether the battery 10a is in a charging state or a discharging state to the control device 60. Note that the state detection unit only needs to be able to detect the state related to the charging of the battery 10a, and is not limited to the BMU 10a1.

[0037] The display device 70 can display the charging state of the battery unit 10, that is, the information related to the charging of the battery 10a, under the control of the control device 60. The display device 70 is connected to the control device 60 and changes the display form based on the signal output from the control device 60. Specifically, the display device 70 can change the display form to display the remaining capacity of the battery 10a, the charging state, and the discharging state of the battery 10a.

[0038] The display device 70 is provided, for example, on the exterior body 9 of the portable power supply vehicle 1, and notifies the state of the battery 10a to the outside. In the present embodiment, as shown in FIG. 3, the display device 70 is the tail lamp 13 arranged on the rear wall 9b of the exterior body 9. The tail lamp 13 can display the charging state by means of the lighting color or the lighting display of the indicator during the charging of the portable power supply vehicle 1.

[0039] For example, depending on the lighting color of the tail lamp 13, when it is off, it indicates that the remaining capacity of the battery 10a is zero; when it is red, the remaining capacity is small; when it is yellow, the remaining capacity is medium; and when it is green, the remaining capacity is large. Also, when the tail lamp 13 is based on the lighting display of the indicator, for example, it is composed of divided bars obtained by dividing the tail lamp 13 into five in the vertical direction. If all five divided bars are off, the remaining capacity of the battery 10a is zero. Also, if the lowermost one of the divided bars is lit, the remaining capacity is small. If the lowermost three of the divided bars are lit, the remaining capacity is medium. If all five divided bars are lit, the remaining capacity is large.

[0040] Note that the display device 70 may be disposed on other parts of the exterior body 9 (for example, the rear wall 9b). For example, the display device 70 may display the charging state by the lighting color of the headlamp 12 or the lighting display of the indicator instead of or together with the tail lamp 13. Note that the display modes of the tail lamp 13 and the headlamp 12 are not limited to the above content and can be changed as appropriate.

[0041] As shown in FIG. 5, the portable power supply vehicle 1 includes a power supply device 16 that supplies power to an external target vehicle 100A (for example, a work vehicle 100). As shown in FIGS. 2 and 3, the power supply device 16 is provided on both sides in the width direction of the vehicle body 2 (that is, the right side wall 9c and the left side wall 9c).

[0042] As shown in FIG. 5, the power supply device 16 includes a power supply port 17 and an arm mechanism 18. The power supply port 17 is a socket for supplying power from the battery unit 10 to an external target vehicle 100A (for example, a work vehicle 100).

[0043] The arm mechanism 18 supports the power supply port 17 and is configured to be able to change the relative position of the power supply port 17 with respect to the vehicle body 2. As shown in FIG. 6B described later, the arm mechanism 18 is a robot arm 19 that can displace the power supply port 17 toward the charging port 120 of the target vehicle 100A (for example, a work vehicle 100). The robot arm 19 is, for example, a vertical articulated robot arm.

[0044] The robot arm 19 can be displaced, under the control of the control device 60, between a retracted state (see FIGS. 1 to 3) in which the arm mechanism 18 is folded and the power supply port 17 is stored in the storage portion of the power supply device 16, and an extended state (see FIGS. 6B, 7B, and 8) in which the arm mechanism 18 is extended and the power supply port 17 is advanced outward.

[0045] As shown in FIGS. 2 and 3, the power supply device 16 includes three sets of robot arms 19 each having a power supply port 17 on the left side wall 9c and the right side wall 9c of the exterior body 9, respectively. In other words, three power supply ports 17 are provided along the front-rear direction on the left side wall 9c, and three power supply ports 17 are also provided along the front-rear direction on the right side wall 9c.

[0046] As shown in FIG. 5, the portable power supply vehicle 1 includes a sensing device 30 that senses the periphery of the vehicle body 2. The sensing device 30 is connected to the control device 60. As shown in FIGS. 1 to 3, the sensing device 30 is provided on the left side wall 9c and the right side wall 9c of the exterior body 9, respectively.

[0047] The sensing device 30 is, for example, an imaging device such as a CCD camera equipped with a CCD (Charge Coupled Devices) image sensor, a CMOS (Complementary Metal Oxide Semiconductor) camera equipped with a CMOS image sensor, or an infrared camera. The sensing device 30 may be a laser sensor, that is, a LiDAR (Light Detection And Ranging). In this embodiment, it is assumed that the sensing device 30 is a CCD camera.

[0048] As shown in FIG. 5, the control device 60 includes an image recognition unit 60b. The image recognition unit 60b recognizes an image of the charging port included in the captured image (that is, an image of the charging port 120 of the work vehicle 100) by performing image analysis on the captured image captured by the sensing device 30 (CCD camera). The image recognition unit 60b is, for example, an image processing chip including a processor such as a CPU and a storage unit such as a ROM and a RAM. The storage unit stores an image analysis program, data, and the like. By executing the image analysis program stored in the storage unit, the processor functions as the image recognition unit 60b that performs image analysis on the captured image.

[0049] For example, the storage unit of the image recognition unit 60b stores in advance a determination identification image indicating the charging port 120 and the workable distance of the power supply device 16.

[0050] FIG. 6A is an explanatory diagram showing recognition of the charging port of the target vehicle by the portable power supply vehicle. As shown in FIG. 6A, when the work vehicle 100 is located on the side of the portable power supply vehicle 1, the control device 60, upon receiving an instruction from the operator, causes the sensing device 30 (CCD camera) to capture an image of the work vehicle 100 and causes the image recognition unit 60b to perform image analysis on the captured image.

[0051] Specifically, the image recognition unit 60b determines whether an image matching the determination identification image is included in the captured image by performing pattern matching processing between the captured image and the determination identification image of the charging port 120 stored in the storage unit in advance. When there is a match, the image recognition unit 60b determines that the captured image includes an image of the charging port 120. On the other hand, when the captured image does not include an image matching the determination identification image, the image recognition unit 60b determines that the captured image does not include an image of the charging port 120.

[0052] When it is determined that the image of the charging port 120 is included, the control device 60 calculates the distance from the power supply device 16 to the charging port 120 of the work vehicle 100 based on the captured image including the image of the charging port 120, and determines whether it is within the workable distance of the power supply device 16. When the sensing device 30 includes a laser sensor, the control device 60 may determine whether the distance measured by the laser sensor is within the workable distance.

[0053] FIG. 6B is an explanatory diagram showing power supply to the target vehicle at the power supply port of the portable power supply vehicle. As shown in FIG. 6B, when the control device 60 determines that it is within the workable distance of the power supply device 16, it drives the robot arm 19 closest to the charging port 120 among the three robot arms 19. The control device 60 drives the robot arm 19 to a state where the power supply port 17 at the tip of the robot arm 19 faces the charging port 120 of the work vehicle 100. The control device 60 drives the robot arm 19 so as to connect the power supply port 17 to the charging port 120.

[0054] When the power supply port 17 is connected to the charging port 120 of the work vehicle 100, the BMU 10a1 confirms that power supply from the battery 10a to the work vehicle 100 is possible. Then, when it is confirmed by the BMU 10a1 that power supply is possible, the control device 60 causes the BMU 10a1 to start power supply from the battery 10a to the work vehicle 100. Note that power supply to the work vehicle 100 is performed with the portable power supply vehicle 1 and the work vehicle 100 stopped.

[0055] FIG. 7A is an explanatory diagram showing an example where the charging port of the target vehicle cannot be recognized by the portable power supply vehicle. In the positional relationship between the portable power supply vehicle 1 and the work vehicle 100 shown by the dashed line in FIG. 7A, the charging port 120 of the work vehicle 100 is not included in the imaging range of the sensing device 30 (CCD camera). In this case, the image recognition unit 60b determines that the image of the charging port 120 is not included in the captured image.

[0056] When the control device 60 determines that the image of the charging port 120 is not included, it moves the portable power supply vehicle 1 as indicated by the solid line in FIG. 7A. Specifically, based on the captured image, the control device 60 controls the drive device 6 so that the charging port 120 of the work vehicle 100 is included within the imaging range of the sensing device 30 (CCD camera), and moves it by the automatic driving of the vehicle body 2. That is, the portable power supply vehicle 1 makes a movement of being laterally attached to the work vehicle 100 so that the power supply device 16 faces the charging port 120 of the work vehicle 100 (moves in the direction of the arrow shown in FIG. 7A). In FIG. 7A, the portable power supply vehicle 1 reverses to a position where the charging port 120 of the work vehicle 100 is included within the imaging range of the sensing device 30 (CCD camera).

[0057] FIG. 7B is an explanatory diagram showing power supply to a target vehicle at the power supply port of the portable power supply vehicle. As shown in FIG. 7B, when the control device 60 determines that it is within the operable distance of the power supply device 16, it drives the robot arm 19 that is closest to the charging port 120 among the three robot arms 19. The control device 60 drives the robot arm 19 to a state where the power supply port 17 at the tip of the robot arm 19 faces the charging port 120 of the work vehicle 100. The control device 60 drives the robot arm 19 so that the power supply port 17 is connected to the charging port 120. Then, when it is confirmed by the BMU10a1 that power supply is possible from the battery 10a to the work vehicle 100 after the connection of the power supply port 17 to the charging port 120, the BMU10a1 starts power supply from the battery 10a to the work vehicle 100.

[0058] Furthermore, the portable power supply vehicle 1 can simultaneously supply power to each work vehicle 100 located on both its left and right sides. FIG. 8 is a plan view showing a state where power is being supplied to target vehicles at the power supply ports on both the left and right sides of the portable power supply vehicle.

[0059] As shown in FIG. 8, the control device 60 changes the position of the vehicle body 2 so that the distance to the charging port 120 of the work vehicle 100 (target vehicle 100A) located on the side of the vehicle body 2 is within a predetermined distance based on the sensing result of the sensing device 30. That is, the control device 60 moves the vehicle body 2 to a position where the distance to the charging port 120 of the work vehicle 100 is within a predetermined distance by performing control related to the automatic driving of the vehicle body 2.

[0060] As shown in FIG. 8, when one of the power supply ports 17 on both sides in the width direction of the vehicle body 2 supplies power to one work vehicle 100 (target vehicle 100A), the other power supply port 17 can supply power to another work vehicle 100 (target vehicle 100A). That is, the portable power supply vehicle 1 can independently and parallelly execute power supply from one power supply port 17 to one work vehicle 100 (target vehicle 100A) and power supply from the other power supply port 17 to another work vehicle 100 (target vehicle 100A).

[0061] Note that although the three power supply ports 17 of the power supply device 16 are of the same type, they may also be of specifications according to the type of the work vehicle 100. For example, the plurality of power supply ports 17 may have specifications (such as shape and standard) according to types such as for electric tractors, for electric construction machines, and for electric agricultural machines (such as combines and rice transplanters).

[0062] Also, although the three power supply ports 17 of the power supply device 16 are of the same type, the power supply specifications (charging specifications) may be different. For example, the three power supply ports 17 may be for different uses such as rapid charging, normal charging, and slow charging. Also, the three power supply ports 17 of the power supply device 16 may have different performances such as for large current, medium current, and small current.

[0063] Also, although the three power supply ports 17 of the power supply device 16 are all robotic arms 19, at least one of them may be of a manual type that an operator connects to the charging port 120 of the work vehicle 100 by hand, or may be of a cable type.

[0064] Note that the power supply to the work vehicle 100 is performed while the portable power supply vehicle 1 and the work vehicle 100 are stopped, but it may also be performed while the portable power supply vehicle 1 and the work vehicle 100 are traveling at the same speed (for example, low speed).

[0065] The main characteristic items and effects of the portable power supply vehicle 1 in the embodiment described above are as follows.

[0066] (Item A1) A portable power supply vehicle 1 including a vehicle body 2 connectable to a work vehicle 100 and towable by the work vehicle 100, wheels 3 supporting the vehicle body 2, a battery unit 10 provided in the vehicle body 2, and a power supply port 17 for supplying power from the battery unit 10 to an external target vehicle 100A.

[0067] According to this configuration, the portable power supply vehicle 1 is towed by the work vehicle 100 and can be placed near the work vehicle 100 by releasing the connection with the work vehicle 100. Therefore, it is not necessary to drive separately to bring the power supply vehicle closer to the work vehicle 100. Further, since the portable power supply vehicle 1 is near the work vehicle 100, power can be supplied from the power supply port 17 of the portable power supply vehicle 1 to the work vehicle 100. That is, the work vehicle 100 can be charged immediately. Thus, it is possible to provide a portable power supply vehicle 1 that has no driving burden and can be charged quickly.

[0068] (Item A2) The portable power supply vehicle 1 according to Item A1, wherein the power supply port 17 is provided on both sides in the width direction of the vehicle body 2.

[0069] According to this configuration, since the power supply ports 17 are provided on both sides in the width direction of the vehicle body 2, power can be supplied to the target vehicle 100A (for example, the work vehicle 100) using either one of the power supply ports 17 on either side.

[0070] (Item A3) Among the power supply ports 17 on both sides in the width direction of the vehicle body 2, when one of the power supply ports 17 is supplying power to one of the target vehicles 100A, the other power supply port 17 can supply power to another target vehicle 100A. The portable power supply vehicle 1 according to Item A2.

[0071] According to this configuration, the target vehicles 100A can be respectively positioned on both sides in the width direction of the vehicle body 2, and it is possible to simultaneously execute supplying power to one target vehicle 100A by one power supply port 17 and supplying power to another target vehicle 100A by the other power supply port 17. That is, it is possible to simultaneously charge the target vehicles 100A on both sides (that is, two work vehicles 100). Therefore, it is possible to efficiently execute the charging of the target vehicles 100A on both sides.

[0072] (Item A4) The portable power supply vehicle 1 according to any one of Items A1 to A3, comprising an arm mechanism 18 that supports the power supply port 17 and can change the relative position of the power supply port 17 with respect to the vehicle body 2.

[0073] According to this configuration, since the arm mechanism 18 supports the power supply port 17 and can change the relative position of the power supply port 17 with respect to the vehicle body 2, the power supply port 17 can be changed to an arbitrary position, and it is easy to operate the power supply port 17.

[0074] (Item A5) The portable power supply vehicle 1 according to Item A4, wherein the arm mechanism 18 is a robot arm 19 capable of displacing the power supply port 17 toward the charging port 120 of the target vehicle 100A.

[0075] According to this configuration, since the arm mechanism 18 is a robot arm 19 capable of displacing the power supply port 17 toward the charging port 120 of the target vehicle 100A, the power supply port 17 can be suitably connected to the charging port 120 of the target vehicle 100A. Therefore, it is possible to eliminate the connection work of the power supply port 17 by the operator and reduce the work load during charging.

[0076] (Item A6) The portable power supply vehicle 1 according to any one of Items A1 to A5, comprising a charging port 15a provided on the front side or the rear side of the vehicle body 2 and connected to an external charging facility 200 to charge the battery unit 10.

[0077] According to this configuration, the portable power supply vehicle 1 can charge the battery unit 10 through the charging port 15a connected to the external charging facility 200.

[0078] (Item A7) The portable power supply vehicle 1 according to Item A6, comprising a display device 70 for displaying the charging state from the charging port 15a to the battery unit 10.

[0079] According to this configuration, since the display device 70 displays the charging state from the charging port 15a to the battery unit 10, the operator can grasp the charging state of the portable power supply vehicle 1.

[0080] (Item A8) The portable power supply vehicle 1 according to any one of Items A1 to A7, comprising a driving device 6 for driving the wheels 3 and a control device 60 for controlling the driving device 6 and performing control related to the automatic driving of the vehicle body 2.

[0081] According to this configuration, since the control device 60 controls the driving device 6 and performs control related to the automatic driving of the vehicle body 2, the portable power supply vehicle 1 can be automatically driven.

[0082] (Item A9) The portable power supply vehicle 1 according to Item A8, comprising a sensing device 30 for sensing the surroundings of the vehicle body 2, and the control device 60 changes the position of the vehicle body 2 based on the sensing result of the sensing device 30 so that the distance to the charging port 120 of the target vehicle 100A located on the side of the vehicle body 2 is within a predetermined distance.

[0083] According to this configuration, the sensing device 30 senses the surroundings of the vehicle body 2. The control device 60 changes the position of the vehicle body 2 so that the distance to the charging port 120 of the target vehicle 100A located on the side of the vehicle body 2 is within a predetermined distance based on the sensing result of the sensing device 30. For this reason, the portable power supply vehicle 1 can be moved to an appropriate power supply position for the target vehicle 100A by automatic driving, and power supply from the power supply port 17 of the portable power supply vehicle 1 to the work vehicle 100 can be appropriately executed.

[0084] As described above, the present invention has been described. However, it should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of claims rather than the above description, and it is intended that all modifications within the meaning and scope equivalent to the scope of claims are included.

Explanation of reference numerals

[0085] 1 Portable power supply vehicle 2 Vehicle body 3 Wheels 4 Coupling part 6 Driving device 10 Battery unit 13 Tail lamp (display device) 15a Charging port 17 Power supply port 18 Arm mechanism 19 Robot arm 30 Sensing device 70 Display device 100 Work vehicle 100A Target vehicle (work vehicle) 200 Charging facility

Claims

1. A body that can be connected to a work vehicle and towed by the work vehicle, wheels that support the body, a battery unit provided on the body, and a power supply port for supplying power from the battery unit to an external target vehicle. A portable power supply vehicle.

2. The portable power supply vehicle according to claim 1, wherein the power supply ports are respectively provided on both sides in the width direction of the body.

3. The portable power supply vehicle according to claim 2, wherein when one of the power supply ports on both sides in the width direction of the body is supplying power to one of the target vehicles, the other power supply port can supply power to the other target vehicle.

4. The portable power supply vehicle according to claim 1, further comprising an arm mechanism that supports the power supply port and can change the relative position of the power supply port with respect to the body.

5. The portable power supply vehicle according to claim 4, wherein the arm mechanism is a robot arm that can displace the power supply port toward the charging port of the target vehicle.

6. The portable power supply vehicle according to claim 1, further comprising a charging port provided on the front side or the rear side of the body and connected to an external charging facility to charge the battery unit.

7. The portable power supply vehicle according to claim 6, further comprising a display device that displays the charging state from the charging port to the battery unit.

8. a driving device for driving the wheels, and a control device for controlling the driving device and performing control related to the automatic driving of the body. The portable power supply vehicle according to claim 1.

9. The portable power supply vehicle further comprises a sensing device for sensing the surroundings of the body, and the control device changes the position of the body so that the distance from the charging port of the target vehicle located on the side of the body is within a predetermined distance based on the sensing result of the sensing device. The portable power supply vehicle according to claim 8.

Images