WORK MACHINE AND METHOD FOR CHARGING A BATTERY

Abstract

A working machine includes a rotating body, a working device coupled to the rotating body, and a power supply device that can be connected to an external power supply and provides power to a power supply destination.

Description

TECHNICAL AREA

[0001] The present disclosure relates to a working machine and a method for charging a battery. STATE OF THE ART

[0002] Patent document 1 discloses a technique for wireless energy transmission between vehicles. LITERATURE LIST Patent literature

[0003] Patent document 1: US 2021 / 0323420 A BRIEF DESCRIPTION OF THE INVENTION Technical Problem

[0004] A piece of construction equipment is operated on a construction site. This electrically powered machine includes a battery. The battery is charged using electricity supplied by a charging station. A technique was sought to deliver electricity to a power supply point using a method other than a charging station.

[0005] One purpose of the present disclosure is to supply a power supply destination with electricity. Solution to the problem

[0006] According to the present disclosure, a working machine is provided. The working machine includes a rotating body, a working device coupled to the rotating body, and a power supply device that can be connected to an external power supply and supplies power to a power supply target. ADVANTAGEOUS EFFECTS OF THE INVENTION

[0007] According to the present disclosure, electricity is supplied to a power supply destination. Brief description of the drawings Fig. Figure 1 is a diagram illustrating a management system for a working machine according to one embodiment. Fig. Figure 2 is a diagram illustrating an excavator according to one embodiment. Fig. Figure 3 is a diagram illustrating a bulldozer according to one embodiment. Fig. Figure 4 is a diagram illustrating a dump truck according to one embodiment. Fig. Figure 5 is a diagram illustrating a control system for the working machine according to one embodiment. Fig. Figure 6 is a block diagram illustrating an administration server and an in-vehicle control system according to one embodiment. Fig. Figure 7 is a diagram illustrating a first example of vehicle-to-vehicle charging according to one embodiment. Fig. Figure 8 is a diagram illustrating a second example of vehicle-to-vehicle charging according to one embodiment. Fig. Figure 9 is a diagram illustrating a third example of vehicle-to-vehicle charging according to one embodiment. Fig. Figure 10 is a diagram illustrating an example of a wired charging method according to one embodiment. Fig. Figure 11 is a diagram illustrating an example of a wireless charging method according to one embodiment. Fig. Figure 12 is a flowchart illustrating a procedure for managing the working machine according to one embodiment. Fig. Figure 13 is a diagram illustrating the excavator according to one embodiment. Fig. Figure 14 is a diagram illustrating a method for charging a battery according to one embodiment. Fig. Figure 15 is a diagram illustrating the excavator according to one embodiment. Fig. Figure 16 is a diagram illustrating a method for charging the battery according to one embodiment. Fig. Figure 17 is a diagram illustrating the excavator according to one embodiment. Fig. Figure 18 is a diagram illustrating a method for charging the battery according to one embodiment. DESCRIPTION OF EXECUTION FORMS

[0008] Embodiments according to the present disclosure are described below with reference to the drawings; however, the disclosure is not limited to a single embodiment. Components of the embodiments described below can be combined in any way. In some cases, certain components are not used. First embodiment

[0009] A first embodiment is described. Overview of the administrative system

[0010] Fig. Figure 1 is a diagram illustrating a management system 1 for a work machine 2 according to one embodiment. The management system 1 manages the work machine 2 operating on a construction site 3. In one embodiment, the work machine 2 is an electric work machine that uses a battery as its power source. A plurality of work machines 2 are located on the construction site 3. In the diagram shown in the diagram, the work machine 2 is an electric work machine that uses a battery as its power source. Fig. In the illustrated example 1, the work machine 2 on the construction site 3 includes an excavator 2A, a bulldozer 2B and a dump truck 2C.

[0011] In one embodiment, the operators do not climb onto the machine 2. The machine 2 is remotely controllable. A remote control room 4 is installed outside the machine 2. The remote control room 4 is located at a distance from the construction site 3. An information terminal 5 and a remote control device 6 for operating the machine 2 are located in the remote control room 4. Both the information terminal 5 and the remote control device 6 are located outside the machine 2. The information terminal 5 includes a computer system located in the remote control room 4.

[0012] The remote control device 6 is operated by an operator in the remote control room 4. The remote control device 6 generates operating signals for the remote control of the machine 2 through the operator's input. The operating signals generated in the remote control device 6 are entered into the information terminal 5. The information terminal 5 generates a remote control command based on the operating signals from the remote control device 6. The information terminal 5 transmits the remote control command to the machine 2 via a communication system 7.

[0013] The work machine 2 operates based on a remote control command transmitted from the information terminal 5 located outside the work machine 2. At least one of the work machine 2 and one of the construction site 3 are equipped with a camera that captures image data from the construction site 3. The image data from the construction site 3 are transmitted to the information terminal 5 via the communication system 7 and displayed on a screen of the information terminal 5. The operator can operate the remote control device 6 while reviewing the image data from the construction site 3.

[0014] Communication system 7 can include a public communication line or a dedicated communication line. Communication system 7 is illustrated by the example of a mobile phone communication network or a satellite communication network. Communication system 7 can include the internet or a local area network.

[0015] Management system 1 includes a management server 8. Management server 8 includes a computer system. Management server 8 can communicate with work machine 2 via communication system 7. Management server 8 collects operational data from work machine 2. Management server 8 issues a control command to work machine 2. Work machines

[0016] Fig. Figure 2 is a diagram illustrating the excavator 2A according to one embodiment. The excavator 2A includes a rotary body 9, a travel body 10, a working tool 11, and a working tool cylinder 12.

[0017] The rotating body 9 is rotatably supported by the drive body 10. The drive body 10 moves while supporting the rotating body 9. The drive body 10 encloses a pair of crawler tracks 10A. The excavator 2A is moved by the rotation of the crawler tracks 10A.

[0018] The working device 11 is coupled to the rotary body 9. The working device 11 includes a boom 11A coupled to the rotary body 9, an arm 11B coupled to the boom 11A, and a bucket 11B coupled to the arm 11C. The working device cylinder 12 includes a boom cylinder 12A, which operates the boom 11A, an arm cylinder 12B, which operates the arm 11B, and a bucket cylinder 12C, which operates the bucket 11C.

[0019] Fig. Figure 3 is a diagram illustrating the bulldozer 2B according to one embodiment. The bulldozer 2B includes a vehicle body 13, a chassis 14, an excavating work tool 15, a ripper work tool 16, a work tool cylinder 17, and a ripper cylinder 18.

[0020] The vehicle body 13 is supported by the chassis 14. The chassis 14 moves while supporting the vehicle body 13. The chassis 14 incorporates a pair of crawler tracks 14A. The bulldozer 2B is moved by the rotation of the crawler tracks 14A.

[0021] The excavation attachment 15 performs excavation, bulldozing, or ground leveling work at a work site. The excavation attachment 15 is mounted on the vehicle body 13. At least part of the excavation attachment 15 is located at the front of the vehicle body 13. The excavation attachment 15 includes an excavation blade 15A. The attachment cylinder 17 actuates the excavation blade 15A.

[0022] The ripping tool 16 performs ripping work at the work target. The work target of the ripping tool 16 includes the ground of the construction site. The ripping tool 16 is attached to the vehicle body 13. At least part of the ripping tool 16 is located at the rear of the vehicle body 13. The ripping tool 16 includes a shaft 16A. The ripping cylinder 18 actuates the shaft 16A.

[0023] Fig. Figure 4 is a diagram illustrating the 2C dump truck according to one embodiment. As shown in Fig. As illustrated in Figure 4, the dump truck 2C includes a vehicle body 19, a driving device 20, a tipping body 21 and a lifting cylinder 22.

[0024] The drive mechanism 20 includes a plurality of wheels 20A and a steering device for steering the wheels 20A. The lifting cylinder 22 raises and lowers the tipping skip 21. One end section of the lifting cylinder 22 is rotatably coupled to the vehicle body 19 via a bracket (not illustrated). The other end section of the lifting cylinder 22 is rotatably coupled to the tipping skip 21 via a bracket (not illustrated). The tipping skip 21 is an element onto which a load is placed. The tipping skip 21 is raised and lowered by actuating the lifting cylinder 22. Control system

[0025] Fig. Figure 5 is a diagram illustrating a control system 30 for the working machine 2 according to one embodiment. The working machine 2 includes the control system 30. The control system 30 includes a battery 31, a charging device 32, a DC / DC converter 33, an inverter 34, an electric motor 35, a hydraulic pump 36, a main valve 37, a hydraulic actuator 38, a power supply device 39, an in-vehicle control unit 40, a battery sensor 41, a position sensor 42, and a communication device 43.

[0026] Control system 30 includes control system 30A installed in excavator 2A, control system 30B installed in bulldozer 2B, and control system 30C installed in dump truck 2C. Control system 30A, control system 30B, and control system 30C have equivalent structures and functions.

[0027] The 30A control system for the 2A excavator includes a 31A battery, a 32A charging device, a 33A DC / DC converter, a 34A inverter, a 35A electric motor, a 36A hydraulic pump, a 37A main valve, a 38A hydraulic actuator, a 39A power supply device, a 40A in-vehicle control unit, a 41A battery sensor, a 42A position sensor, and a 43A communication device.

[0028] The control system 30B for the bulldozer 2B includes a battery 31B, a charging device 32B, a DC / DC converter 33B, an inverter 34B, an electric motor 35B, a hydraulic pump 36B, a main valve 37B, a hydraulic actuator 38B, a power supply device 39B, an in-vehicle control 40B, a battery sensor 41B, a position sensor 42B and a communication device 43B.

[0029] The control system 30C for the dump truck 2C includes a battery 31C, a charging device 32C, a DC / DC converter 33C, an inverter 34C, an electric motor 35C, a hydraulic pump 36C, a main valve 37C, a hydraulic actuator 38C, a power supply device 39C, an in-vehicle control 40C, a battery sensor 41C, a position sensor 42C and a communication device 43C.

[0030] Battery 31A, battery 31B, and battery 31C have equivalent functions. In the following description, battery 31A, battery 31B, and battery 31C may be referred to collectively as battery 31. The same applies to the charging device 32, the DC / DC converter 33, the inverter 34, the electric motor 35, the hydraulic pump 36, the main valve 37, the hydraulic actuator 38, the power supply device 39, the vehicle's internal control unit 40, the battery sensor 41, the position sensor 42, and the communication device 43.

[0031] Battery 31 is a battery installed in the working machine 2. Battery 31 includes a secondary battery. In one embodiment, battery 31 includes a lithium-ion battery (LiB).

[0032] The charging device 32 is connected to an external power supply 23, which is provided outside the work machine 2. The external power supply 23 includes at least one of the batteries 31 of another work machine 2, a large battery pack installed on the construction site 3, or a charging station. The charging device 32 charges the battery 31 with power supplied by the external power supply 23.

[0033] The DC / DC converter 33 amplifies a voltage from the battery 31. The DC / DC converter 33 supplies direct current from the battery 31 to the inverter 34.

[0034] The inverter 34 converts the direct current from the DC / DC converter 33 into a three-phase alternating current and supplies this current to the electric motor 35. The electric motor 35 is driven on the basis of the three-phase alternating current supplied by the inverter 34.

[0035] The electric motor 35 is a drive source for the working machine 2. The electric motor 35 is powered based on current from the battery 31.

[0036] The hydraulic pump 36 is driven by the electric motor 35. The hydraulic pump 36 delivers hydraulic oil. The hydraulic oil delivered from the hydraulic pump 36 is supplied to the hydraulic actuator 38 via the main valve 37. The hydraulic actuator 38A of the excavator 2A engages the working cylinder 12. The hydraulic actuator 38B of the bulldozer 2B engages the working cylinder 17 and the ripper cylinder 18. The hydraulic actuator 38C of the dump truck 2C engages the lifting cylinder 22.

[0037] Instead of the hydraulic actuator 38, an electric actuator can also be provided in the working machine 2. The working cylinder 12 can be an electric cylinder. Both the working cylinder 17 and the ripper cylinder 18 can be electric cylinders. The lifting cylinder 22 can be an electric cylinder. If an electric actuator is provided in the working machine 2 instead of the hydraulic actuator 38, the hydraulic pump 36 and the main valve 37 are omitted.

[0038] The power supply device 39 is connected to a power supply destination 24, which is provided outside the working machine 2. The power supply device 39 supplies the power supply destination 24 with power from the battery 31. The power supply destination 24 connects to the battery 31 of another working machine 2. The power supply device 39 charges the battery 31 of the other working machine 2 with power supplied by the battery 31.

[0039] The vehicle's internal control unit 40 includes a computer system. The vehicle's internal control unit 40 controls at least the charging device 32 and the power supply device 39.

[0040] The battery sensor 41 includes a voltage sensor for detecting the voltage of the battery 31. The position sensor 42 detects the position of the work machine 2. The position of the work machine 2 is detected using the Global Navigation Satellite System (GNSS). The Global Navigation Satellite System includes a Global Positioning System (GPS). The Global Navigation Satellite System detects the position in the global coordinate system, which is defined by the coordinate data latitude, longitude, and geographic altitude. The global coordinate system is an Earth-referenced coordinate system. The position sensor 42 includes a GNSS receiver. The position sensor 42 detects the position of the work machine 2 in the global coordinate system. The communication device 43 can communicate wirelessly with the management server 8. Management server and in-vehicle control

[0041] Fig. Figure 6 is a block diagram illustrating the management server 8 and the vehicle-integrated control unit 40 according to one embodiment. The management server 8 and the vehicle-integrated control unit 40 each comprise a computer system. The management server 8 comprises a processor 44, such as a central processing unit (CPU), main memory 45, which includes non-volatile memory such as read-only memory (ROM) and volatile memory such as random-access memory (RAM), memory 46, and an interface 47, which includes an input / output circuit. Functions of the management server 8 are stored as a computer program in memory 46. The processor 44 reads the computer program from memory 46, loads the computer program into main memory 45, and executes a process according to the computer program.The computer program can be distributed to the management server 8 via a network.

[0042] The vehicle's internal control unit 40 includes a processor 48, a main memory 49, a memory 50 and an interface 51.

[0043] The processor 48 includes a residual charge calculation unit 48A, a position data transmission unit 48B, a charging control unit 48C, a power supply control unit 48D and a driving control unit 48E.

[0044] The residual charge calculation unit 48A calculates the remaining charge of battery 31 based on detection data from battery sensor 41. The remaining charge of battery 31 can be considered its state of charge (SOC). The state of charge of battery 31 represents the ratio of the remaining charge to the full charge capacity. Battery sensor 41 detects the voltage of battery 31. The residual charge calculation unit 48A can calculate the remaining charge of battery 31 based on detection data from battery sensor 41. The residual charge calculation unit 48A transmits the calculated remaining charge of battery 31 to management server 8. The remaining charge of battery 31 is transmitted to management server 8 via communication system 7.

[0045] The position data transmission unit 48B acquires the detection data from the position sensor 42. The detection data from the position sensor 42 indicates the position of the work machine 2. The position data transmission unit 48B transmits the acquired position of the work machine 2 to the management server 8. The position of the work machine 2 is transmitted to the management server 8 via the communication system 7.

[0046] The charging control unit 48C controls the charging device 32. The charging control unit 48C charges the battery 31 based on the current supplied by the external power supply 23.

[0047] The power supply control unit 48D controls the power supply device 39. The power supply control unit 48D supplies power to the power supply target 24 based on the power supplied by the battery 31.

[0048] The drive control unit 48E controls the movement of the working machine 2. The drive control unit 48E of the vehicle's internal control system 40A controls the drive body 10. The drive control unit 48E of the vehicle's internal control system 40B controls the drive body 14. The drive control unit 48E of the vehicle's internal control system 40C controls the driving device 20.

[0049] The processor 44 includes a residual charge receiving unit 44A, a position data receiving unit 44B, and an allocation unit 44C. The memory 46 includes a work plan memory unit 46A.

[0050] The work plan storage unit 46A stores a work plan for each of the multiple work machines 2. The work plan is created, for example, by a site manager 3. Before work machine 2 starts working on site 3, the work plan is stored in the work plan storage unit 46A.

[0051] The work plan is, for example, a work plan for machine 2 on a given day. The work plan storage unit 46A stores a work plan for machine 2, which, for example, operates from 9:00 a.m. to 5:00 p.m.

[0052] The residual charge receiving unit 44A detects the residual charge of the battery 31 of each of the multiple work machines 2 on the construction site 3. The residual charge receiving unit 44A receives the residual charge of the battery 31 transmitted by each of the multiple work machines 2 on the construction site 3. A communication device 52 is connected to the interface 47. The residual charge receiving unit 44A receives the residual charge of the battery 31 transmitted by the work machine 2 via the communication system 7 and the communication device 52.

[0053] The position data receiving unit 44B records the position of each of the multiple work machines 2 on the construction site 3. The position data receiving unit 44B receives the position of work machine 2 transmitted by work machine 2. The position data receiving unit 44B receives the position of work machine 2 transmitted by work machine 2 via the communication system 7 and the communication device 52.

[0054] The allocation unit 44C issues a charging command to charge the battery 31 of a first working machine 2 from a second working machine 2 based on the remaining charge of the battery 31 of each of the multiple working machines 2. The allocation unit 44C issues the charging command to charge the battery 31 of the first working machine 2 to be charged by the second working machine 2, which includes the battery 31 that is capable of charging the battery 31 of the first working machine 2. The allocation unit 44C issues the charging command to charge the battery 31 of the first working machine 2 with a small remaining charge, for example, by the second working machine 2, which includes the battery 31 with a large remaining charge.

[0055] The allocation unit 44C can issue the charging command to charge the battery 31 of the first working machine 2 by the second working machine 2 based on the residual charge of the battery 31 of each of the plurality of working machines 2 and the position of each of the plurality of working machines 2.

[0056] The allocation unit 44C can issue the charging command to charge the battery 31 of the first working machine 2 by the second working machine 2 based on the residual charge quantity of the battery 31 of each of the plurality of working machines 2 and the work plan for each of the plurality of working machines 2.

[0057] The allocation unit 44C can issue the charging command to charge the battery 31 of the first working machine 2 by the second working machine 2 based on the remaining charge quantity of the battery 31 of each of the plurality of working machines 2 and the working status of each of the plurality of working machines 2. Vehicle-to-vehicle charging

[0058] In one embodiment, the battery 31 of the first work machine 2 to be charged is charged by the second work machine 2, which includes the battery 31 capable of charging the battery 31 of the first work machine 2 at the construction site 3. The residual charge receiving unit 44A of the management server 8 detects the residual charge level of the battery 31 of each of the plurality of work machines 2 at the construction site 3. Based on the residual charge level of the battery 31 of each of the plurality of work machines 2, the residual charge receiving unit 44A determines whether the first work machine 2 with the battery 31 to be charged is present. Based on the residual charge level of the battery 31 of each of the plurality of work machines 2, the residual charge receiving unit 44A determines whether the second work machine 2 with the battery 31 capable of charging the battery 31 of the first work machine 2 is present.When it is determined that the first working machine 2 and the second working machine 2 are present, the allocation unit 44C issues the charging command to charge the battery 31 of the first working machine 2 to the second working machine 2. First example

[0059] For example, on construction site 3, the battery 31 of the first working machine 2 with a small residual charge is recharged by the second working machine 2, which includes the battery 31 with a large residual charge.

[0060] The battery 31 of work machine 2 is charged at a charging station before work machine 2 begins operation. The battery 31 is fully charged at the charging station. After the battery 31 is fully charged, work machine 2 operates at construction site 3. As the power of battery 31 is consumed while work machine 2 is operating at construction site 3, the remaining charge of battery 31 gradually decreases.

[0061] For example, the multiple work machines 2 may each have a different remaining charge level in their battery 31, depending on the work performed, even if the operating time is the same. In a case where, for example, each of the multiple work machines 2 operates on construction site 3 from 9:00 AM to 5:00 PM, at 1:00 PM, work machine 2 may have a large remaining charge level in its battery 31, while work machine 3 may have a small remaining charge level. If there is no charging station at construction site 3, it is difficult to recharge the battery 31 at a charging station after work has started.

[0062] In one embodiment, current is transferred between the plurality of working machines 2. The working machine 2 that includes the battery 31 with a large residual charge charges the battery 31 of the working machine 2 with a small residual charge.

[0063] Fig. Figure 7 is a diagram illustrating a first example of vehicle-to-vehicle charging according to one embodiment. The residual charge receiving unit 44A of the management server 8 detects the residual charge of the battery 31 of each of the plurality of work machines 2 on the construction site 3. The residual charge receiving unit 44A determines whether the first work machine 2 whose residual charge of the battery 31 is equal to or less than a predetermined first threshold is present.

[0064] If it is determined that the first working machine 2 is present with a low residual charge of the battery 31, the residual charge receiving unit 44A determines whether the second working machine 2 is present with the battery 31 whose residual charge exceeds the residual charge of the battery 31 of the first working machine 2.

[0065] In the Fig. In the illustrated example 7, the bulldozer 2B is the first working machine 2 that includes battery 31B, where the remaining charge is equal to or less than the first threshold. The dump truck 2C is the second working machine 2 that includes battery 31C, whose remaining charge exceeds the remaining charge of battery 31B in bulldozer 2B. The allocation unit 44C determines that the bulldozer 2B with battery 31B, whose remaining charge is equal to or less than the first threshold, is the first working machine 2 with the battery 31 to be charged. The allocation unit 44C determines that the dump truck 2C with battery 31C, whose remaining charge exceeds the remaining charge of battery 31B of bulldozer 2B, is the second working machine 2 with battery 31 that is capable of charging battery 31B of bulldozer 2B.When it is determined that the bulldozer 2B, which is the first working machine 2, and the dump truck 2C, which is the second working machine 2, are present, the allocation unit 44C issues a charging command to charge the battery 31B of the bulldozer 2B to the dump truck 2C.

[0066] The charging command issued by the allocation unit 44C is transmitted to the vehicle's internal control unit 40C of the dump truck 2C. The drive control unit 48E of the dump truck 2C controls the drive mechanism 20 of the dump truck 2C based on the position of the bulldozer 2B to move the dump truck 2C close to the bulldozer 2B. As the dump truck 2C and the bulldozer 2B approach each other, the power supply control unit 48D of the dump truck 2C controls the power supply device 39C to charge the battery 31B of the bulldozer 2B.

[0067] If there are multiple second work machines 2 with battery 31 on site 3, and their remaining charge exceeds the remaining charge of battery 31B of bulldozer 2B, the allocation unit 44C arranges for the second work machine 2 with battery 31 with the largest remaining charge to recharge battery 31B of bulldozer 2B. Similarly, if there are multiple dump trucks 2C with battery 31C and a large remaining charge on site 3, the allocation unit 44C arranges for the dump truck 2C with battery 31C with the largest remaining charge to recharge battery 31B of bulldozer 2B. Second example

[0068] Fig. Figure 8 is a diagram illustrating a second example of vehicle-to-vehicle charging according to one embodiment. The residual charge receiving unit 44A of the management server 8 detects the residual charge of the battery 31 of each of the plurality of work machines 2 on the construction site 3. The residual charge receiving unit 44A determines whether the first work machine 2 is present whose residual charge of the battery 31 is equal to or less than the predetermined first threshold.

[0069] If it is determined that the first working machine 2 is present with a low residual charge of the battery 31, the residual charge receiving unit 44A determines whether the second working machine 2 is present with the battery 31 whose residual charge exceeds the residual charge of the battery 31 of the first working machine 2.

[0070] In the Fig. In the illustrated example 8, the bulldozer 2B is the first working machine 2 that includes the battery 31B, where a residual charge is equal to or less than the threshold. A dump truck 2C1 and a dump truck 2C2 are the second working machines 2 that include the battery 31C, whose residual charge exceeds the residual charge of the battery 31B of the bulldozer 2B.

[0071] The position data receiving unit 44B records the position of each of the multiple work machines 2 on the construction site 3. If it is determined that multiple dump trucks 2C are present, serving as the second work machines 2, the allocation unit 44C determines which dump truck 2C is to charge the battery 31C of the bulldozer 2B, based on the position of the bulldozer 2B and the position of each of the multiple dump trucks 2C (2C1 and 2C2).

[0072] The allocation unit 44C calculates the distance between the bulldozer 2B and each of the multiple dump trucks 2C (2C1, 2C2) based on the position of the bulldozer 2B and the position of each of the multiple dump trucks (2C2, 2C, 2C1). The allocation unit 44C then directs the dump truck 2C that is closest to the bulldozer 2B to charge the battery 31B of the bulldozer 2B.

[0073] In the Fig. In the illustrated example 8, the allocation unit 44C calculates a first distance between the bulldozer 2B and the dump truck 2C1 based on the positions of the bulldozer 2B and the dump truck 2C1. The allocation unit 44C calculates a second distance between the bulldozer 2B and the dump truck 2C2 based on the positions of the bulldozer 2B and the dump truck 2C2. If the first distance is shorter than the second distance, the allocation unit 44C issues a charging command to charge the battery 31B of the bulldozer 2B to the dump truck 2C1. Third example

[0074] Fig. Figure 9 is a diagram illustrating a third example of vehicle-to-vehicle charging according to one embodiment. The residual charge receiving unit 44A of the management server 8 detects the residual charge of the battery 31 of each of the plurality of work machines 2 at the construction site 3. The allocation unit 44C detects a work plan for each of the plurality of work machines 2 at the construction site 3. The residual charge receiving unit 44A determines whether the first work machine 2 is present whose residual charge of the battery 31 is equal to or less than the predetermined first threshold.

[0075] If it is determined that the first working machine 2 is present with a low residual charge of the battery 31, the residual charge receiving unit 44A determines whether the second working machine 2 is present with the battery 31 whose residual charge exceeds the residual charge of the battery 31 of the first working machine 2.

[0076] In the Fig. In the illustrated example 9, the bulldozer 2B is the first working machine 2 that includes the battery 31B, where a residual charge is equal to or less than the first threshold. A dump truck 2C1 and a dump truck 2C2 are the second working machines 2 that include the battery 31C, whose residual charge exceeds the residual charge of the battery 31B of the bulldozer 2B.

[0077] If it is determined that a plurality of dump trucks 2C are available to serve as second work machines 2, the allocation unit 44C calculates a predicted power consumption value for each of the plurality of dump trucks 2C based on the work schedule for each of the plurality of dump trucks 2C. The allocation unit 44C then designates the dump truck 2C to charge the battery 31B of the bulldozer 2B based on the predicted power consumption values ​​of the plurality of dump trucks 2C (2C3, 2C4).

[0078] For example, if battery 31B of bulldozer 2B is charged at 1:00 PM, allocation unit 44C forecasts the power consumption of dump truck 2C3 from 1:00 PM to 5:00 PM based on the dump truck 2C3's work schedule for 1:00 PM to 5:00 PM. Allocation unit 44C forecasts the power consumption of dump truck 2C4 from 1:00 PM to 5:00 PM based on the dump truck 2C4's work schedule for 1:00 PM to 5:00 PM.

[0079] The power consumption of battery 31 varies depending on the workload of machine 2. For example, if only a few transport operations are planned for dump truck 2C3 between 1:00 PM and 5:00 PM, the predicted power consumption of dump truck 2C3 will be low. Conversely, if extensive transport operations are planned for dump truck 2C4 between 1:00 PM and 5:00 PM, the predicted power consumption of dump truck 2C4 will be high.

[0080] The allocation unit 44C instructs the dump truck 2C with the lowest predicted power consumption to charge the battery 31B of the bulldozer 2B.

[0081] In the Fig. In the example shown, the allocation unit 44C calculates a first predicted power consumption value for the dump truck 2C3 based on the dump truck's work schedule. The allocation unit 44C then calculates a second predicted power consumption value for the dump truck 2C4, also based on the dump truck's work schedule. If the first predicted value is lower than the second, the allocation unit 44C issues a charging command to charge the dump truck 2C3's battery 31B. Because the predicted power consumption of the dump truck 2C3 is low, the dump truck 2C3 can operate until 5:00 PM, even though power is being supplied from the dump truck 2C3's battery 31C to the bulldozer 2B's battery 31B.

[0082] If it is determined that multiple dump trucks 2C are present, serving as second work machines 2, the allocation unit 44C can calculate the predicted remaining charge of battery 31C of dump truck 2C based on the work schedule for each of the multiple dump trucks 2C when the work of each multiple dump truck 2C is completed. The allocation unit 44C can then assign dump truck 2C to charge battery 31B of bulldozer 2B based on the predicted remaining charge of battery 31C when the work of the multiple dump trucks 2C (2C3, 2C4) is completed. The allocation unit 44C then directs the dump truck 2C that includes battery 31C with the highest predicted remaining charge to charge battery 31B of bulldozer 2B.

[0083] The allocation unit 44C calculates the predicted remaining charge values ​​of the 31C batteries of the multiple 2C dump trucks (2C3, 2C4), for example, at 5:00 PM, based on the work schedule for each of the multiple 2C dump trucks (2C3, 2C4). The allocation unit 44C calculates a third predicted remaining charge value for the 31C battery of dump truck 2C3 at 5:00 PM, when dump truck 2C3's work ends, based on the work schedule for dump truck 2C3. The allocation unit 44C calculates a fourth predicted remaining charge value for the 31C battery of dump truck 2C4 at 5:00 PM, when dump truck 2C4's work ends, based on the work schedule for dump truck 2C4. If the third predicted value is greater than the fourth predicted value, the allocation unit 44C issues a charging command to charge the battery 31B of the bulldozer 2B to the dump truck 2C3.Since the predicted value of the remaining charge of battery 31C of the dump truck 2C3 is high, the dump truck 2C3 can operate until 5:00 PM, even if battery 31B of the bulldozer 2B is powered by battery 31C of the dump truck 2C3. Fourth example

[0084] If a plurality of second working machines 2 are available, the allocation unit 44C can determine the second working machine 2 to charge the battery 31 of the first working machine 2 based on the operating data of each of the plurality of second working machines 2.

[0085] As described above, the management server 8 collects operational data from machine 2. This operational data includes the operating status of machine 2, which can be either "In Operation" or "Not in Operation." Machine 2 is equipped with a status sensor to detect this operational data. Based on the status sensor's detection data, the allocation unit 44C can determine whether machine 2 is in operation or not.

[0086] The allocation unit 44C can determine the second work machine 2 for charging the battery 31 of the first work machine 2 based on operating data from each of the multiple second work machines 2. As described above, the management server 8 collects operating data from work machine 2. This operating data includes the operating status of work machine 2, which can be either "In Operation" or "Not in Operation." Work machine 2 is equipped with a status sensor to detect the operating data. Based on the status sensor's detection data, the allocation unit 44C can determine whether work machine 2 is in operation or not. For example, the allocation unit 44C can issue a charging command to charge the battery 31 of the first work machine 2 to the second work machine 2, which is not in operation. Fifth example

[0087] Based on the planned tasks and the remaining charge of battery 31 for each of the multiple work machines 2, the allocation unit 44C can determine whether the first work machine 2 with the battery 31 to be charged is available. The planned tasks for each of the multiple work machines 2 are determined based on the work plan described above. The allocation unit 44C can designate the work machine 2 that has been determined to deplete the remaining charge of battery 31 by the end of the planned tasks as the first work machine 2 to be charged. Based on the time or load required for the planned tasks, the allocation unit 44C determines whether the remaining charge of battery 31 will be depleted by the end of the planned tasks. The longer the time required for the planned tasks, the higher the probability that the remaining charge of battery 31 will be depleted by the end of the planned tasks.The greater the load required for the planned work, the higher the probability that the remaining charge of battery 31 will be depleted by the end of the planned work. Based on the time or load required for the planned work, the allocation unit 44C determines that the work machine 2, which is determined to deplete the remaining charge of battery 31 by the end of the planned work, is the first work machine 2 to include the battery 31 to be charged. Sixth example

[0088] The allocation unit 44C can designate a working machine with a residual charge of battery 31 that is equal to or greater than a predetermined second threshold as the second working machine that includes battery 31 capable of charging the battery 31 of the first working machine 2. The second threshold is greater than the first threshold described above. Seventh example

[0089] The allocation unit 44C can determine, based on the planned work and the remaining charge of battery 31 of each of the multiple work machines 2, whether the second work machine 2 with a battery 31 capable of charging the battery 31 of the first work machine 2 is available. The planned work of each of the multiple work machines 2 is determined based on the work plan described above. The allocation unit 44C can determine that the work machine 2, which is determined to have a remaining charge of battery 31 at the end of the planned work, is the second work machine 2, which includes a battery 31 capable of charging the battery 31 of the first work machine 2. The allocation unit 44C determines, based on the time or load required for the planned work, whether the battery 31 still has a remaining charge at the end of the planned work.The shorter the time required for the planned work, the higher the probability that battery 31 will still have a remaining charge at the end of the planned work. Conversely, the shorter the time required for the planned work, the higher the probability that battery 31 will still have a remaining charge at the end of the planned work. Based on the time or load required for the planned work, the allocation unit 44C determines that the work machine 2, which is determined to have a remaining charge in battery 31 at the end of the planned work, is the second work machine 2 that includes the battery 31 capable of charging the battery 31 of the first work machine 2. Eighth example

[0090] Notwithstanding the charging command from the allocation unit 44C, the vehicle's internal control unit 40 of the second work machine 2 can detect the remaining charge of the battery 31 of another work machine 2 at the construction site 3; it can determine whether another work machine 2 with the battery 31 to be charged is present and issue the charging command to charge the battery 31 of the other work machine 2 if it is determined that the other work machine 2 with the battery 31 to be charged is present. For example, the work machine 2 designated for charging (second work machine 2), which includes the battery 31 with a large capacity, can be deployed at the construction site 3, and this work machine 2 designated for charging can detect the remaining charge of the battery 31 of the other work machine 2 at the construction site 3 and charge the battery 31 of another work machine 2 with a low remaining charge. Charging method

[0091] When the 2C dump truck is charging the 2B bulldozer's 31B battery, the 2C dump truck can charge the 2B bulldozer's 31B battery either wired or wirelessly.

[0092] Fig. Figure 10 is a diagram illustrating a method for charging battery 31B using a wired charging method according to one embodiment. The power supply control unit 48D of the dump truck 2C charges battery 31B of the bulldozer 2B via a wired connection based on the charging command received from the allocation unit 44C. A base end section of a power supply arm 25 is connected to the power supply device 39C of the dump truck 2C. A distal end section of the power supply arm 25 is connected to a power supply port of the bulldozer 2B. The power supply port of the bulldozer 2B is connected to the charging device 32B of the bulldozer 2B. The power supply device 39C of the dump truck 2C supplies power to the charging device 32B of the bulldozer 2B, with the power supply arm 25 being connected to the power supply port of the bulldozer 2B.The power supply unit 39C supplies the charging unit 32B with power from battery 31C via the power supply arm 25. The battery 31B of the bulldozer 2B is charged by supplying power from the battery 31C of the dump truck 2C to the charging unit 32B.

[0093] Fig. Figure 11 is a diagram illustrating an example of a wireless charging method according to one embodiment. The power supply control unit 48D of the dump truck 2C wirelessly charges the battery 31B of the bulldozer 2B based on the charging command received from the allocation unit 44C. The dump truck 2C is equipped with a wireless power supply 26C, and the bulldozer 2B is equipped with a wireless power receiver 26B. In the dump truck 2C, the wireless power supply 26C is connected to the power supply device 39C. In the bulldozer 2B, the wireless power receiver 26B is connected to the charging device 32B. The power supply device 39C supplies the wireless power supply 26C with power from the battery 31C. The wireless power supply 26C wirelessly delivers the power from the battery 31C to the wireless power receiver 26B. The power supplied to the wireless power receiver 26B is delivered to the charging device 32B.The battery 31B of the bulldozer 2B is charged by supplying power from the battery 31C of the dump truck 2C to the charging device 32B. Administrative procedure

[0094] Fig. Figure 12 is a flowchart illustrating a method for managing the work machine 2 according to one embodiment. The residual charge receiving unit 44A of the management server 8 receives the residual charge of the battery 31 of each of the plurality of work machines 2 on the construction site 3 (step S1).

[0095] The residual charge receiving unit 44A determines whether the first working machine 2 is present with a residual charge of the battery 31 that is equal to or less than a predetermined threshold (step S2).

[0096] If step S2 determines that the first working machine 2 is not present (step S2: No), the process returns to step S1. If step S2 determines that the first working machine 2 is present (step S2: Yes), the residual charge receiving unit 44A determines whether the second working machine 2 with battery 31 is present, whose residual charge exceeds the residual charge of battery 31 of the first working machine 2 (step S3).

[0097] If step S3 determines that the second work machine 2 is not present (step S3: No), the processing returns to step S1. If step S3 determines that the second work machine 2 is present (step S3: Yes), the position data receiving unit 44B receives the position of the first work machine 2 and the position of the second work machine 2 at the construction site 3 (step S4).

[0098] The allocation unit 44C retrieves the work plan for the second machine 2 from the work plan storage unit 46A. The allocation unit 44C forecasts the power consumption of the second machine 2 based on the work plan (step S5).

[0099] If a large number of second working machines 2 are available, the allocation unit 44C determines the second working machine 2 for charging the battery 31 of the first working machine 2 based on the position of the first working machine 2 and the positions of the second working machines 2. The allocation unit 44C determines the second working machine 2 for charging the battery 31 of the first working machine 2 based on the predicted value of the current consumption of the second working machine 2 (step S6).

[0100] The allocation unit 44C issues the charging command to instruct the second working machine 2, determined in step S6, to charge the battery 31 of the first working machine 2 (step S7).

[0101] The allocation unit 44C transmits the charging command to the vehicle-internal control unit 40 of the second working machine 2 determined in step S6. The vehicle-internal control unit 40, which has received the charging command, causes the second working machine 2 to approach the first working machine 2, and then causes the power supply device 39 of the second working machine 2 to supply power to the charging device 32 of the first working machine 2.

[0102] The allocation unit 44C can transmit the charging command to the information terminal 5 to remotely control the work machine 2. When the information terminal 5 receives the charging command, a message is displayed on its screen indicating that the charging command has been received. After checking the message on the screen, the operator can remotely control work machine 2 to instruct the second work machine 2 to charge the battery 31 of the first work machine 2. Effects

[0103] As described above, according to one embodiment, vehicle-to-vehicle charging is carried out between the plurality of work machines 2 at the construction site 3. The battery 31 of the first work machine 2 to be charged is charged by the second work machine 2, which includes a battery 31 capable of charging the battery 31 of the first work machine 2. This allows, for example, the battery 31 of the first work machine 2 to be charged even if there is no charging station at or near the construction site 3. This enables the first work machine 2 to operate continuously. Second embodiment

[0104] A second embodiment is described. In the following description, components that are identical or equivalent to those of the first embodiment described above are designated with the same reference numerals, and the description of the components is simplified or omitted. Administrative procedure

[0105] Fig. Figure 13 is a diagram illustrating the excavator 2A according to one embodiment. In the Fig. In the example shown in Figure 13, an external power supply 27 is connected to the excavator 2A. The external power supply 27 is a commercial power supply or a large battery pack. The charging device 32A of the excavator 2A is connected to the external power supply 27 via a cable 28. The power supply device 39A of the excavator 2A can also be connected to the external power supply 27. In one embodiment, the power supply device 39A of the excavator 2A is connected to the external power supply 27 via the battery 31A, the charging device 32A, and the cable 28.

[0106] The power supply device 39A of the excavator 2A supplies power to the dump truck 2C, which is the power supply target, with the charging device 32A being connected to the external power supply 27 via the cable 28. In one embodiment, the power supply device 39A of the excavator 2A supplies power to the dump truck 2C, which is the power supply target, with the power being supplied from the external power supply 27 to the charging device 32A via the cable 28. The battery 31C of the dump truck 2C is charged with the power supplied by the excavator 2A.

[0107] Fig. Figure 14 is a diagram illustrating a method for charging battery 31C according to one embodiment. The excavator 2A performs charging operations by loading a load onto the dump truck 2C, which includes battery 31C, using the work device 11. As shown in Fig. Figure 14 illustrates that the dump truck 2C moves into a loading position next to the excavator 2A during loading operations. The dump truck 2C remains stationary in the loading position during the loading operations.

[0108] The 39A power supply unit of excavator 2A provides power to the dump truck 2C during loading operations. In the Fig. In the illustrated example 14, the power supply device 39A provides power to the dump truck 2C via a wired connection. A base end section of a power supply arm 29 is connected to the power supply device 39A of the excavator 2A. The base end section of the power supply arm 29 is connected to the chassis 10. The power supply arm 29 extends from the chassis 10. A distal end section of the power supply arm 29 is connected to a power supply port of the dump truck 2C. The power supply port of the dump truck 2C is connected to the loading device 32C of the dump truck 2C. The power supply device 39A of the excavator 2A supplies power to the loading device 32C of the dump truck 2C, with the power supply arm 29 being connected to the power supply port of the dump truck 2C.The excavator 2A's power supply unit 39A delivers power from battery 31A via power supply arm 29 to the charging unit 32C. The dump truck 2C's battery 31C is charged by delivering power from the excavator 2A's battery 31A to the dump truck 2C's charging unit 32C.

[0109] During loading operations, the dump truck 2C remains stationary at the loading position. The rotating body 9 and the working attachment 11 of the excavator 2A operate during loading, while the chassis 10 is essentially stationary. The power supply arm 29 extends from the chassis 10. Therefore, the excavator 2A can charge the battery 31C of the dump truck 2C during loading operations.

[0110] When the loading operations are complete, the power supply arm 29 is disconnected from the power supply port of the dump truck 2C. After the power supply arm 29 is disconnected from the power supply port, the dump truck 2C begins to move and leaves the loading position. Once the dump truck 2C has left the loading position, the next dump truck 2C moves into the loading position. The excavator 2A begins loading operations, transferring a load to the next dump truck 2C. During the loading operations, the battery 31C of the dump truck 2C is charged, with the power supply arm 29 connected to the power supply port of the dump truck 2C.

[0111] The 32A charging device of the excavator 2A is connected to the external power supply 27 via cable 28. The 32A charging device continuously or periodically charges the battery 31A of the excavator 2A with the current from the external power supply 27. This allows the excavator 2A to charge the battery 31A of any of the multiple dump trucks 2C with the current from the battery 31C. Effects

[0112] As described above, the power supply device 39A of the excavator 2A supplies power to the dump truck 2C, which is the power supply target, with the charging device 32A being connected to the external power supply 27. The battery 31A of the excavator 2A is charged with the power supplied by the external power supply 27. The battery 31C of the dump truck 2C is charged with the power supplied to the dump truck 2C from the battery 31A of the excavator 2A. The charging device 32A of the excavator 2A continuously or periodically charges the battery 31A of the excavator 2A with the power from the external power supply 27. This allows the excavator 2A to successively charge the battery 31C of each of the multiple dump trucks 2C with the power from the battery 31A.

[0113] During loading operations, the dump truck 2C remains stationary, allowing the excavator 2A to easily recharge the dump truck's battery 31C. The dump truck 2C can remain stationary for several minutes during loading operations. It can use this downtime to recharge its battery 31C. Third embodiment

[0114] A third embodiment is described. In the following description, components that are identical or equivalent to those of the first embodiment described above are designated with the same reference numerals, and the description of the components is simplified or omitted.

[0115] Fig. Figure 15 is a diagram illustrating the excavator 2A according to one embodiment. As in Fig. As illustrated in Figure 15, the charging device 32A of the excavator 2A is connected to the external power supply 27 via cable 28.

[0116] The power supply unit 39A of the excavator 2A is connected to a drive robot 60 via a cable 62. The drive robot 60 includes a power supply arm 61. Power from the battery 31A is supplied to the power supply arm 61 via the power supply unit 39A, the cable 62, and the drive robot 60. The power supply unit 39A provides power, with the power supply arm 61 of the drive robot 60 being connected to the power supply connection of the dump truck 2C.

[0117] Fig. Figure 16 is a diagram illustrating a method for charging battery 31C according to one embodiment. During charging, the dump truck 2C remains stationary at the charging position.

[0118] The excavator 2A's power supply unit 39A provides power to the dump truck 2C during loading operations. During loading, the robot 60 moves close to the dump truck 2C. Once the robot 60 has approached the dump truck 2C's power supply port, it connects a distal end section of the power supply arm 61 to the dump truck 2C's power supply port. The excavator 2A's power supply unit 39A then provides power to the dump truck 2C's loading device 32C, with the power supply arm 61 connected to the dump truck 2C's power supply port. The excavator 2A's power supply unit 39A provides power from battery 31A to the loading device 32C via cable 62, the robot 60, and the power supply arm 61. The 2C dump truck's battery 31C is charged by supplying power from the 2A excavator's battery 31A to the 2C dump truck's charging device 32C.

[0119] Once the charging process is complete, the power supply arm 61 is disconnected from the power supply connection of the dump truck 2C. After the power supply arm 61 has been disconnected from the power supply connection, the dump truck 2C begins to move and leaves the loading position. Fourth embodiment

[0120] A fourth embodiment is described. In the following description, components that are identical or equivalent to those of the first embodiment described above are designated with the same reference numerals, and the description of the components is simplified or omitted.

[0121] Fig. Figure 17 is a diagram illustrating the excavator 2A according to one embodiment. As in Fig. As illustrated in Figure 17, the charging device 32A of the excavator 2A is connected to the external power supply 27 via cable 28.

[0122] In one embodiment, the power supply unit 39A of the excavator 2A wirelessly supplies power to the dump truck 2C. A charging pad 63 is connected to the power supply unit 39A of the excavator 2A via a cable 64. The current from the battery 31A is supplied to the charging pad 63 via the power supply unit 39A and the cable 62.

[0123] Fig. Figure 18 is a diagram illustrating a method for charging the battery 31C according to one embodiment. The charging pad 63 is installed in the charging position. The charging pad 63 is installed on the floor. The dump truck 2C moves into the charging position to be parked over the charging pad 63. During the charging operation, the dump truck 2C remains stationary in the charging position. The dump truck 2C is positioned over the charging pad 63.

[0124] The excavator's 39A power supply unit provides power to the dump truck 2C during charging operations. The excavator's 39A power supply unit also provides power to the charging pad 63, with the dump truck 2C positioned above the charging pad 63. The excavator's 39A power supply unit provides power to the charging pad 63 via cable 64 from battery 31A.

[0125] The charging pad 63 charges the 31C battery of the 2C dump truck. The charging pad 63 can be a contact charging pad, which charges the 31C battery when it comes into contact with at least part of the 2C dump truck, or it can be a contactless (wireless) charging pad, which charges the 31C battery without coming into contact with the 2C dump truck. The contact charging pad has a power supply terminal that connects to a power receiving terminal provided in the 2C dump truck. The contact charging pad allows for fast charging of the 31C battery. The wireless charging pad charges the 2C dump truck's 31C battery wirelessly. When the 2C dump truck is positioned over the wireless charging pad, a short distance is established between the wireless charging pad and the 2C dump truck's 31C battery. This allows the wireless charging pad to wirelessly charge the 31C battery of the 2C dump truck.

[0126] Once charging is complete, the dump truck 2C begins to move away from the charging position. When the dump truck 2C leaves the charging position and the charging pad 63 and the dump truck 2C are separated, the charging process for battery 31C ends. Reference symbol list

[0127] 1 Management system, 2 Working machine, 2A Excavator, 2B Bulldozer, 2C Dump truck, 2C1 Dump truck, 2C2 Dump truck, 2C3 Dump truck, 2C4 Dump truck, 3 Construction site, 4 Remote control room, 5 Information terminal, 6 Remote control device, 7 Communication system, 8 Management server, 9 Rotating body, 10 Undercarriage, 10A Track, 11 Working tool, 11A Boom, 11B Arm, 11C Bucket, 12 Working tool cylinder, 12A Boom cylinder, 12B Arm cylinder, 12C Bucket cylinder, 13 Vehicle body, 14 Undercarriage, 14A Track, 15 Excavating tool, 15A Excavating blade, 16 Ripper, 16A Shaft, 17 Working tool cylinder, 18 Ripper cylinder, 19 Vehicle body, 20 Driving device, 20A Wheel, 21 Tipping skip, 22 Lifting cylinder, 23 External power supply, 24 Power supply target, 25 Power supply arm, 26B Wireless power receiver, 26C Wireless power feed, 27 External power supply, 28 Cable, 29 Power supply arm, 30 Control system, 30A Control system, 30B Control system30C Control system, 31 Battery, 31A Battery, 31B Battery, 31C Battery, 32 Charging device, 32A Charging device, 32B Charging device, 32C Charging device, 33 DC / DC converter, 33A DC / DC converter, 33B DC / DC converter, 33C DC / DC converter, 34 Inverter, 34A Inverter, 34B Inverter, 34C Inverter, 35 Electric motor, 35A Electric motor, 35B Electric motor, 35C Electric motor, 36 Hydraulic pump, 36A Hydraulic pump, 36B Hydraulic pump, 36C Hydraulic pump, 37 Main valve, 37A Main valve, 37B Main valve, 37C Main valve, 38 Hydraulic actuator, 38A Hydraulic actuator, 38B Hydraulic actuator, 38C Hydraulic actuator, 39 Power supply device, 39A Power supply device, 39B Power supply device, 39C Power supply device, 40 In-vehicle control, 40A In-vehicle control, 40B In-vehicle control, 40C In-vehicle control, 41 Battery sensor, 41A Battery sensor, 41B Battery sensor, 41C Battery sensor, 42 Position sensor, 42A Position sensor42B Position sensor, 42C Position sensor, 43 Communication device, 43A Communication device, 43B Communication device, 43C Communication device, 44 Processor, 44A Residual charge receiving unit, 44B Position data receiving unit, 44C Assignment unit, 45 Main memory, 46 Memory, 46A Work plan memory unit, 47 Interface, 48 Processor, 48A Residual charge calculation unit, 48B Position data transmission unit, 48C Charging control unit, 48D Power supply control unit, 48E Driving control unit, 49 Main memory, 50 Memory, 51 Interface, 52 Communication device, 60 Driving robot, 61 Power supply arm, 62 Cable, 63 Charging pad, 64 Cable QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] US 2021 / 0323420 A

[0003]

Claims

[1] Working machine, comprising: a body of revolution; a working device that is coupled to the rotating body; and A power supply device that can be connected to an external power supply and provides power to a power supply destination. [2] Working machine according to claim 1, wherein the power supply device is connected to the external power supply via a cable. [3] Working machine according to claim 1, wherein the power supply device supplies the power supply target with current while it is supplied with current by the external power supply. [4] Working machine according to claim 1, comprising: a battery, whereby The power supply device supplies the power supply target with power from the battery. [5] Working machine according to claim 1, wherein the loading operations, in which a load is loaded onto a dump truck that includes a battery, are carried out with the work equipment, the power supply target of the dump trucks is, and The power supply device provides electricity to the dump truck during loading operations. [6] Working machine according to claim 5, wherein the power supply device supplies the dump truck with power by means of a wired connection. [7] Working machine according to claim 6, comprising a power supply arm for connection to the power supply device, wherein The power supply device provides power to the power supply arm connected to a power supply port of the dump truck. [8] Working machine according to claim 6, wherein a mobile robot is connected to the power supply device and The power supply device provides power via a power supply arm of the driving robot connected to a power supply connection of the dump truck. [9] Working machine according to claim 5, wherein the power supply device wirelessly supplies the dump truck with power. [10] Working machine according to claim 5, wherein a charging pad is connected to the power supply device and The power supply device provides power with the dump truck positioned above the charging pad. [11] Working machine according to claim 10, wherein the charging pad is a wireless charging pad. [12] Method for charging a battery, the method comprising: Supplying power from an external power supply to a working machine that includes a rotating body and a working tool carried by the rotating body; and During loading operations, where the work machine loads a load onto the dump truck, charging a dump truck battery by the work machine. [13] Method for charging a battery, the method comprising: Charging a battery of a working machine, which includes a rotating body and a working device coupled to the rotating body, with power supplied by an external power supply; and Supplying power from the battery to a dump truck and charging the dump truck's battery.

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