Non-contact power transmission device

Abstract

The invention belongs to the technical field of power transmission devices, and particularly relates to a non-contact power transmission device which comprises a base, a trolley is placed above the base, a PLC is fixedly connected to the upper side wall of the base, and a power source with an electric quantity sensing element is arranged in the trolley. When a power supply in the trolley is charged in a non-contact manner, the charging speed can be automatically slowed down after the internal electric quantity of the power supply reaches 90%, so that irreversible damage to the power supply caused by deposition of lithium metal on the surface of a negative electrode due to the fact that an electromagnetic induction charging device charges the power supply at high efficiency all the time is avoided; when the electromagnetic induction charging device is used for charging a power supply in the trolley, heat generated when the magnetic induction coil works can be automatically dissipated, and the problems that too much heat is accumulated in the magnetic induction coil, coil aging is accelerated, and the service life of the coil is shortened are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of power transmission devices, and in particular relates to a contactless power transmission device. Background Art

[0002] In recent years, electronic devices have been installed on mobile carts such as shopping carts to improve the convenience of shopping for customers. The carts are equipped with power supplies for supplying power to the electronic devices. The charging system of the power supply installed on the carts uses a non-contact method to supply power to the carts in the storage position. A common non-contact power supply device is an electromagnetic induction charging device. For example, a non-contact power supply system and a power supply device are proposed in patent publication number CN112491152A.

[0003] In the process of charging the trolley, the operator is usually required to place the trolley on the surface of the power transmission device, and then use the electromagnetic induction charging device to charge the power supply inside the trolley. In addition, in order to ensure the charging efficiency of the power supply, the electromagnetic induction charging device generally charges the power supply with a higher output power until it is fully charged. In view of the many advantages of lithium-ion power supplies such as high energy density and long service life, they are widely used in trolleys. However, when the power of the lithium-ion power supply reaches about 90%, the lithium ion concentration in the negative electrode material will gradually increase. According to the Nernst equation, the electrode potential will change with the change of ion concentration. At this time, the electrode potential of the negative electrode will gradually approach the deposition potential of lithium metal. The existing electromagnetic induction charging device cannot reduce the charging efficiency when the power of the lithium-ion power supply reaches about 90%. If it continues to charge at a higher charging efficiency, it will cause lithium metal to be deposited on the surface of the negative electrode instead of being embedded in the negative electrode lattice structure. Lithium metal deposition is an uncontrollable side reaction that will cause irreversible damage to the power supply.

[0004] Therefore, a contactless power transmission device is proposed to solve the above problems. Summary of the invention

[0005] An object of the present invention is to provide a contactless power transmission device in view of the above-mentioned problems.

[0006] To achieve the above object, the present invention adopts the following technical solutions: a non-contact power transmission device, comprising a base, a trolley is placed above the base, a PLC controller is fixedly connected to the upper side wall of the base, a power supply with a power sensing element is provided inside the trolley, a receiving coil assembly is fixedly connected to the lower side wall of the trolley through a bracket, and further comprising: A plurality of transmitting coil assemblies are fixedly connected to the upper side wall of the base, and the transmitting coil assemblies and the receiving coil assemblies cooperate with each other to supply power to the power source; A cooling component is connected to the inside of the base, the base is a hollow structure, and the cooling component is arranged inside the base to reduce the temperature of the transmitting coil component when it is working; A plurality of limiter components are arranged on the surface of the base to fix the position of the trolley when charging; The aging detection component is arranged inside the transmitting coil component and is used to detect the aging condition of the coil inside the transmitting coil component.

[0007] Preferably, the transmitting coil assembly includes a coil box and a wire reel, the coil box is fixedly connected to the upper side wall of the base, the wire reel is fixedly connected to the upper inner wall of the coil box, the lower inner wall of the coil box is fixedly connected to a driving box, the inner wall of the driving box is rotatably connected to a threaded rod, the right side wall of the driving box is fixedly connected to a driving motor, the output end of the driving motor passes through the side wall of the driving box and is fixedly connected to the threaded rod, the rod wall of the threaded rod is threadedly sleeved with a threaded barrel, the upper side wall of the threaded barrel is fixedly connected to a guide frame, the upper side wall of the driving box is provided with a guide port matching the guide frame, the upper end of the guide frame extends out of the guide port and is fixedly connected to a conduction rod, the conduction rod is electrically connected to an external power supply, a plurality of conduction seats are connected to the surface of the wire reel, the conduction seats pass through the insulating layer of the wire reel and are connected to the conductor inside the wire reel.

[0008] Preferably, the cooling component includes a water tank and a pump, the water tank is fixedly connected to the lower inner wall of the base, the liquid inlet end of the pump is connected to the water tank, the liquid outlet end of the pump is fixedly connected to a serpentine pipe, the rear side wall of the base is fixedly connected to a heat sink, the side wall of the heat sink is fixedly connected to a plurality of heat sinks, the end of the serpentine pipe away from the pump passes through the heat sink and is connected to a cooling pipe, the cooling pipe is serpentinely arranged on the upper inner wall of the base, and the end of the cooling pipe away from the serpentine pipe is connected to the water tank, the inner wall of the base is fixedly connected to a temperature sensor, and the temperature sensor is electrically connected to the pump through a PLC controller.

[0009] Preferably, the limiting assembly includes a plurality of elastic membranes and a plurality of push plates, a plurality of grooves are provided on the left and right sides of the upper surface of the base, the elastic membranes are fixedly connected to the inner walls of the grooves, the push plates are slidably arranged in the grooves, the left and right sides of the lower side walls of the grooves are fixedly connected with arc-shaped plates matching the rollers of the trolley, the inner walls of the grooves are fixedly connected with two piston cylinders, a lifting rod is inserted in the piston cylinder, the upper ends of the two lifting rods are fixedly connected to the lower side wall of the same push plate, the lower end of the lifting rod is located in the piston cylinder and is fixedly connected with The piston plate, the lower side wall of the groove is fixedly connected with a micro water pump, the liquid inlet end of the micro water pump passes through the side wall of the groove and is connected with the cooling pipe, the liquid outlet end of the micro water pump is fixedly connected with a bent pipe, a control valve is arranged in the bent pipe, the end of the bent pipe away from the micro water pump is connected with the piston cylinder on one side, the pipe wall of the bent pipe is connected with a short pipe, the end of the short pipe away from the bent pipe is connected with the piston cylinder on the other side, a pressure sensing component is arranged in the groove, the liquid inlet end and the liquid outlet end of the micro water pump are connected with the same return pipe, and a magnetic control valve is arranged in the return pipe.

[0010] Preferably, the pressure sensing component includes a pressure cylinder and a piston seat, the lower inner wall of the groove is fixedly connected to a support frame located outside the micro water pump, the pressure cylinder is fixedly connected to the upper side wall of the support frame, the inner wall of the pressure cylinder is connected to the piston seat through a spring, the piston seat is slidably arranged in the pressure cylinder, the pressure cylinder and the bent pipe are fixedly connected with the same delivery pipe, the upper inner wall of the pressure cylinder is fixedly connected to an extrusion switch, and the extrusion switch and the delivery pipe are respectively located on both sides of the piston seat.

[0011] Preferably, a control switch is fixedly connected to the upper side wall of the coil box, and the control switch is electrically connected to the drive motor through a PLC controller. A microprocessor is fixedly connected to the upper side wall of the trolley, and a small electric push rod is fixedly connected to the lower side wall of the trolley. An extrusion plate is fixedly connected to the moving end of the small electric push rod, and the power sensing element inside the power supply is electrically connected to the small electric push rod through the microprocessor.

[0012] Preferably, the aging detection component includes a detection cylinder and a block, the upper side wall of the guide frame is fixedly connected with a micro electric push rod, the moving end of the micro electric push rod is fixedly connected to the lower side wall of the detection cylinder, the block is fixedly connected to the inner wall of the detection cylinder through a spring, the upper side wall of the block is fixedly connected with a guide plate, the upper side wall of the guide plate extends out of the detection cylinder and is fixedly connected with a friction block, the lower inner wall of the detection cylinder is fixedly connected with a trigger switch, the upper side wall of the coil box is provided with a warning light, the trigger switch is electrically connected to the warning light through a PLC controller, the lower side wall of the coil box is fixedly connected with a gaussmeter, and the gaussmeter is electrically connected to the PLC controller.

[0013] Preferably, a guide slide cylinder is fixedly connected to the lower side wall of the threaded cylinder, and a guide slide rod matching the guide slide cylinder is connected to the inner wall of the drive box.

[0014] Compared with the existing technology, the advantages of a non-contact power transmission device are: Through the provided base, trolley, PLC controller, power supply, receiving coil assembly and transmitting coil assembly, when the power supply inside the trolley is contactlessly charged, the charging speed can be automatically slowed down after the power inside the power supply reaches 90%, thereby avoiding the electromagnetic induction charging device charging the power supply at a high efficiency all the time, which will cause lithium metal to be deposited on the negative electrode surface and cause irreversible damage to the power supply.

[0015] By setting up a cooling component, when the electromagnetic induction charging device is used to charge the power supply inside the cart, the heat generated by the magnetic induction coil when it is working can be automatically dissipated, avoiding the problem of excessive heat accumulation in the magnetic induction coil, which will accelerate the aging of the coil and shorten the service life of the coil.

[0016] By setting the limit assembly, the wheels of the trolley can be locked when the internal power supply of the trolley is charged, thereby ensuring that the receiving coil assembly under the trolley and the transmitting coil assembly on the surface of the power transmission device are aligned, thereby ensuring the charging efficiency of the trolley.

[0017] By setting up an aging detection component, when the wire reel inside the transmitting coil assembly ages after long-term use, this situation can be detected in time, and the operator can be reminded in time to replace the aged wire reel, thereby ensuring the charging efficiency of the trolley power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a non-contact power transmission device provided by the present invention; Figure 2 It is a structural schematic diagram of a trolley in a contactless power transmission device provided by the present invention; Figure 3 It is a schematic diagram of the surface structure of a base in a contactless power transmission device provided by the present invention; Figure 4 It is a structural schematic diagram of a transmitting coil assembly in a contactless power transmission device provided by the present invention; Figure 5 It is a top view of a wire reel in a non-contact power transmission device provided by the present invention; Figure 6 It is a structural schematic diagram of a limit assembly in a contactless power transmission device provided by the present invention; Figure 7It is a structural schematic diagram of a pressure sensing component in a contactless power transmission device provided by the present invention; Figure 8 It is a structural schematic diagram of an aging detection component in a contactless power transmission device provided by the present invention; Fig. 9 It is a right side cross-sectional view of a base in a non-contact power transmission device provided by the present invention; Fig.10 The present invention provides a non-contact power transmission device Fig. 9 A magnified schematic diagram of part A; Fig.11 It is a structural schematic diagram of a cooling tube in a non-contact power transmission device provided by the present invention.

[0019] In the figure: 1 base, 2 trolley, 3 PLC controller, 4 power supply, 5 receiving coil assembly, 6 transmitting coil assembly, 601 coil box, 602 wire drum, 7 drive box, 8 threaded rod, 9 drive motor, 10 threaded cylinder, 11 guide frame, 12 conduction rod, 13 conduction seat, 14 cooling assembly, 141 water tank, 142 pump, 15 serpentine pipe, 16 heat sink, 17 heat sink, 18 cooling pipe, 19 temperature sensor, 20 limit assembly, 201 elastic membrane, 202 push plate, 21 groove, 22 arc plate, 23 piston cylinder, 24 lifting rod, 2 5 piston plate, 26 micro water pump, 27 elbow, 28 control valve, 29 short pipe, 30 pressure sensing component, 301 pressure cylinder, 302 piston seat, 31 support frame, 32 delivery pipe, 33 extrusion switch, 34 control switch, 35 microprocessor, 36 small electric push rod, 37 extrusion plate, 38 aging detection component, 381 detection cylinder, 382 block, 39 micro electric push rod, 40 guide plate, 41 friction block, 42 ​​trigger switch, 43 warning light, 44 Gauss meter, 45 guide slide cylinder, 46 guide slide rod, 47 return pipe, 48 magnetic control valve. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] like Figure 1-Figure 11 As shown, a contactless power transmission device includes a base 1, a trolley 2 is placed above the base 1, a PLC controller 3 is fixedly connected to the upper side wall of the base 1, a power supply 4 with a power sensing element is provided inside the trolley 2, and a receiving coil assembly 5 is fixedly connected to the lower side wall of the trolley 2 through a bracket, and also includes: A plurality of transmitting coil assemblies 6 are fixedly connected to the upper side wall of the base 1, and the transmitting coil assembly 6 and the receiving coil assembly 5 cooperate with each other to supply power to the power supply 4. The transmitting coil assembly 6 includes a coil box 601 and a wire drum 602. The coil box 601 is fixedly connected to the upper side wall of the base 1, and the wire drum 602 is fixedly connected to the upper inner wall of the coil box 601. The lower inner wall of the coil box 601 is fixedly connected to a driving box 7. The inner wall of the driving box 7 is rotatably connected to a threaded rod 8. The right side wall of the driving box 7 is fixedly connected to a driving motor 9. The output end of the driving motor 9 passes through the side wall of the driving box 7 and is fixedly connected to the threaded rod 8. The rod wall of the threaded rod 8 is threadedly sleeved with a threaded barrel 10. The upper side of the threaded barrel 10 A guide frame 11 is fixedly connected to the wall, and a guide opening matching the guide frame 11 is opened on the upper side wall of the driving box 7. The upper end of the guide frame 11 extends out of the guide opening and is fixedly connected with a conduction rod 12. The conduction rod 12 is electrically connected to the external power source 4. A plurality of conduction seats 13 are connected to the surface of the wire drum 602. The conduction seats 13 pass through the insulating layer of the wire drum 602 and are connected to the conductor inside the wire drum 602. When the power source 4 inside the cart 2 is contactlessly charged, the charging speed can be automatically slowed down after the power inside the power source 4 reaches 90%, thereby avoiding the electromagnetic induction charging device from charging the power source 4 at a high efficiency all the time, which will cause lithium metal to be deposited on the surface of the negative electrode and cause irreversible damage to the power source 4. The cooling component 14 is connected to the inside of the base 1. The base 1 is a hollow structure. The cooling component 14 is arranged inside the base 1 to reduce the temperature of the transmitting coil assembly 6 when it is working. The cooling component 14 includes a water tank 141 and a pump 142. The water tank 141 is fixedly connected to the lower inner wall of the base 1. The liquid inlet end of the pump 142 is connected to the water tank 141. The liquid outlet end of the pump 142 is fixedly connected to a serpentine tube 15. The rear side wall of the base 1 is fixedly connected to a heat sink 16. The side wall of the heat sink 16 is fixedly connected to a plurality of heat sinks 17. The end of the serpentine tube 15 away from the pump 142 passes through the heat sink 16. The heat plate 17 is connected with a cooling pipe 18, which is arranged in a serpentine shape on the upper inner wall of the base 1, and the end of the cooling pipe 18 away from the serpentine pipe 15 is connected with the water tank 141. The inner wall of the base 1 is fixedly connected with a temperature sensor 19, and the temperature sensor 19 is electrically connected with the pump 142 through the PLC controller 3. When the electromagnetic induction charging device is used to charge the power supply 4 inside the trolley 2, the heat generated by the magnetic induction coil when working can be automatically dissipated to avoid excessive heat accumulation in the magnetic induction coil, which will accelerate the aging of the coil and shorten the service life of the coil; A plurality of limit assemblies 20 are arranged on the surface of the base 1 and are used to fix the position of the trolley 2 when charging. The limit assemblies 20 include a plurality of elastic membranes 201 and a plurality of push plates 202. A plurality of grooves 21 are provided on the left and right sides of the upper surface of the base 1. The elastic membranes 201 are fixedly connected to the inner walls of the grooves 21. The push plates 202 are slidably arranged in the grooves 21. The left and right sides of the lower side walls of the grooves 21 are fixedly connected with arc-shaped plates 22 that match the rollers of the trolley 2. The inner wall of the groove 21 is fixedly connected with two piston cylinders 23. A lifting rod 24 is inserted in the piston cylinder 23. The upper ends of the two lifting rods 24 are fixedly connected to the lower side wall of the same push plate 202. The lower end of the lifting rod 24 is located in the piston cylinder 23 and is fixedly connected with a piston plate 25. The lower side wall of the groove 21 is fixedly connected with a micro water pump 26. The liquid inlet end of the pump 26 passes through the side wall of the groove 21 and is connected to the cooling pipe 18. The liquid outlet end of the micro water pump 26 is fixedly connected to a bend pipe 27, and a control valve 28 is provided in the bend pipe 27. The end of the bend pipe 27 away from the micro water pump 26 is connected to the piston cylinder 23 on one side. The pipe wall of the bend pipe 27 is connected to a short pipe 29, and the end of the short pipe 29 away from the bend pipe 27 is connected to the piston cylinder 23 on the other side. A pressure sensing component 30 is provided in the groove 21. The liquid inlet end and the liquid outlet end of the micro water pump 26 are connected to the same return pipe 47, and a magnetic control valve 48 is provided in the return pipe 47. When charging the internal power supply 4 of the cart 2, the wheels of the cart 2 can be locked, so as to ensure that the receiving coil assembly 5 under the cart 2 and the transmitting coil assembly 6 on the surface of the power transmission device are aligned, thereby ensuring the charging efficiency of the cart 2; The aging detection component 38 is arranged inside the transmitting coil component 6 and is used to detect the aging of the coil inside the transmitting coil component 6. The aging detection component 38 includes a detection tube 381 and a block 382. The upper side wall of the guide frame 11 is fixedly connected with a micro electric push rod 39. The moving end of the micro electric push rod 39 is fixedly connected with the lower side wall of the detection tube 381. The block 382 is fixedly connected with the inner wall of the detection tube 381 through a spring. The upper side wall of the block 382 is fixedly connected with a guide plate 40. The upper side wall of the guide plate 40 extends out of the detection tube 381 and is fixedly connected with a friction block 40. 1. A trigger switch 42 is fixedly connected to the lower inner wall of the detection tube 381, and a warning light 43 is provided on the upper wall of the coil box 601. The trigger switch 42 is electrically connected to the warning light 43 through the PLC controller 3. A gaussmeter 44 is fixedly connected to the lower wall of the coil box 601, and the gaussmeter 44 is electrically connected to the PLC controller 3. When the wire reel 602 inside the transmitting coil assembly 6 ages after long-term use, this situation can be detected in time, and the operator can be reminded in time to replace the aged wire reel 602, thereby ensuring the charging efficiency of the power supply 4 inside the trolley 2; The pressure sensing component 30 includes a pressure cylinder 301 and a piston seat 302. The lower inner wall of the groove 21 is fixedly connected to a support frame 31 located on the outside of the micro water pump 26. The pressure cylinder 301 is fixedly connected to the upper side wall of the support frame 31. The inner wall of the pressure cylinder 301 is connected to the piston seat 302 through a spring. The piston seat 302 is slidably arranged in the pressure cylinder 301. The pressure cylinder 301 and the bent pipe 27 are fixedly connected with the same delivery pipe 32. The upper inner wall of the pressure cylinder 301 is fixedly connected to an extrusion switch 33. The extrusion switch 33 and the delivery pipe 32 are respectively located on both sides of the piston seat 302, and can deliver liquid with a certain water pressure into the piston cylinder 23.

[0022] A control switch 34 is fixedly connected to the upper side wall of the coil box 601, and the control switch 34 is electrically connected to the drive motor 9 through the PLC controller 3. A microprocessor 35 is fixedly connected to the upper side wall of the trolley 2, and a small electric push rod 36 is fixedly connected to the lower side wall of the trolley 2. The moving end of the small electric push rod 36 is fixedly connected to an extrusion plate 37. The power sensing element inside the power supply 4 is electrically connected to the small electric push rod 36 through the microprocessor 35. When the power inside the power supply 4 reaches 90%, the small electric push rod 36 will be controlled by the microprocessor 35.

[0023] The lower side wall of the threaded barrel 10 is fixedly connected with a guide slide 45, and the inner wall of the drive box 7 is connected with a guide slide rod 46 that matches the guide slide 45. Through the mutual cooperation of the guide slide 45 and the guide slide rod 46, the threaded barrel 10 is prevented from rotating, so that the threaded barrel 10 can only move left and right in the horizontal direction, thereby reducing the wear of the guide frame 11.

[0024] The operating principle of the present invention is described as follows: the operator plugs a certain number of trolleys 2 together (the rear baffle of the trolley 2 bucket can be rotated inward, and the front end of the bucket of the rear trolley 2 can be inserted into the bucket of the previous trolley 2, which is an existing mature technology), and pushes them to the upper surface of the base 1, and places the front wheels of the trolley 2 on the surface of the elastic membrane 201 (the width of the two front wheels of the trolley 2 will be smaller than the width of the two rear wheels), then the operator sends a signal to the PLC controller 3 through an external remote control device. An electrical signal is transmitted. After receiving the electrical signal, the PLC controller 3 opens the control valve 28 and the magnetic control valve 48. The push plate 202 drives the lifting rod 24 and the piston plate 25 to move downward together under the tension of the spring. The piston plate 25 is used to flush the liquid inside the piston cylinder 23 through the curved pipe 27, the short pipe 29 and the return pipe 47 to the cooling pipe 18 for storage. The wheels located above the elastic membrane 201 move downward under the action of gravity, so that the wheels are stuck in the two arc plates 22, so that the trolley 2 can be fixed; Then the PLC controller 3 controls the conducting rod 12 to be connected to the external power supply 4, so that the alternating current passes through the wire drum 602. According to Ampere's law, the alternating current will generate an alternating magnetic field around the wire drum 602. At this time, the receiving coil assembly 5 under the trolley 2 is located directly above the transmitting coil assembly 6. The receiving coil assembly 5 is located in the alternating magnetic field. Since the magnetic field is alternating, the magnetic flux passing through the receiving coil assembly 5 will change continuously. According to the law of electromagnetic induction, an induced electromotive force will be generated in the receiving coil assembly 5. The magnitude of this induced electromotive force is proportional to the rate of change of the magnetic flux. The receiving coil assembly 5 is related to the number of turns of the receiving coil assembly 5. Since the receiving coil assembly 5 is electrically connected to the power supply 4, an induced current is generated under the drive of the induced electromotive force, thereby realizing the transmission of electric energy from the transmitting coil assembly 6 to the receiving coil assembly 5. When charging the power supply 4, a power sensing element is provided inside the power supply 4 (the power sensing element can be one of a voltage sampler and a Hall sensor). When the power sensing element detects that the power supply 4 inside the power supply 4 reaches 90%, the power sensing unit controls the small electric push rod 36 to reciprocate once through the microprocessor 35, and the small electric push rod 36 is charged. The push rod 36 drives the extrusion plate 37 to move downward, and uses the extrusion plate 37 to squeeze the control switch 34 at the corresponding position below. After being triggered, the control switch 34 will send an electrical signal to the PLC controller 3. After receiving the electrical signal, the PLC controller 3 will control the drive motor 9 to work for a set time. The drive motor 9 drives the threaded rod 8 to rotate, and drives the threaded barrel 10 to move through the threaded match. The threaded barrel 10 drives the conduction rod 12 to move to a set distance in the direction close to the center of the wire drum 602 through the guide frame 11, so that the number of turns of the wire drum 602 can be reduced, E= n*ΔΦ / Δt, where E represents the induced electromotive force, n represents the number of turns of the induction coil, ΔΦ represents the change in magnetic flux, and Δt represents the time interval of the change in magnetic flux. When the number of turns n of the wire coil 602 decreases, the induced electromotive force E will also decrease, thereby reducing the charging efficiency of the wire coil 602. The transmitting coil assembly 6 will charge the power source 4 at a lower charging efficiency, thereby avoiding the electromagnetic induction charging device always charging the power source 4 at a higher efficiency, which will cause lithium metal to be deposited on the negative electrode surface, causing irreversible damage to the power source 4 and extending the service life of the power source 4. When the power source 4 is charging, there is a certain resistance inside the cable reel 602. When current passes through, according to Joule's law, the current does work on the resistance and generates heat, thereby causing the transmitting coil assembly 6 to generate heat. When the temperature sensor 19 inside the base 1 detects that the heat reaches the set threshold, the temperature sensor 19 will control the pump 142 to work through the PLC controller 3. The pump 142 transports the coolant inside the water tank 141 to the cooling tube 18 through the serpentine tube 15. Through the effect of heat radiation, the heat generated by the transmitting coil assembly 6 is transferred to the coolant inside the cooling tube 18. The coolant will carry the heat into the water tank 141, and in the subsequent transportation work of the pump 142, the heat in the coolant will be released to the outside through the heat sink 17; When the power source 4 inside the trolley 2 is charged and in contact, the operator can send an electrical signal to the PLC controller 3 through the external remote control device. After receiving the electrical signal, the PLC controller 3 will control all the micro pumps 26 and control valves 28 to work simultaneously. The micro pump 26 will transport the coolant inside the cooling tube 18 to all the piston cylinders 23 through the elbow 27 and the short tube 29. The lifting rod 24 will drive the push plate 202 to move upward through the hydraulic pressure, and the push plate 202 will drive the wheels of the trolley 2 to move upward to a horizontal position. When the push plate 202 moves to the top and contacts the elastic membrane 201, the push plate 20 2 will be subjected to greater pressure, thereby increasing the hydraulic pressure below the piston plate 25. At the same time, the hydraulic pressure inside the elbow 27 will also increase. The pressure cylinder 301 is connected to the elbow 27 through the delivery pipe 32. After the hydraulic pressure inside the elbow 27 increases, the hydraulic pressure on the right side of the piston seat 302 will also increase synchronously, and the piston seat 302 will continue to move to the left, thereby squeezing the squeezing switch 33. The squeezing switch 33 will control all the micro water pumps 26 to stop working through the PLC controller 3, and control the control valve 28 to close, so that the upper surface of the push plate 202 and the base 1 remain in a horizontal state, which is convenient for the subsequent pushing of the trolley 2 from the base 1; During the operation of the wire drum 602, the magnetic field strength of the wire drum 602 during operation is detected by the Gaussmeter 44 (the principle of the Gaussmeter 44 detecting the magnetic field strength is an existing mature technology and is not described in detail in this article). When the Gaussmeter 44 detects that the magnetic field strength of the wire drum 602 is lower than the set threshold, an electrical signal is transmitted to the PLC controller 3. After receiving the electrical signal, the PLC controller 3 detects the aging degree of the wire drum 602 when the power transmission device is idle (when the wire drum 602 ages, the performance of the wires constituting the wire drum 602 will change. Over time, the wires may oxidize. For example, in an environment with oxygen and a certain humidity, copper oxide will be generated on the surface of the copper wire. The conductivity of copper oxide is worse than that of copper, which increases the resistance of the wire. When the voltage of the power supply 4 remains unchanged, the resistance increases, the current passing through the wire will decrease, and the magnetic field strength of the wire drum 602 will also decrease accordingly). Since the wire drum 602 generates heat during operation when it ages, especially when passing a large current or a high-frequency signal, a long-term high temperature environment will cause the insulation layer material to Thermal aging occurs. During the thermal aging process, the molecular chains of the insulating layer material will undergo reactions such as rupture and cross-linking. For example, under high temperature, the chemical bonds between the molecular chains of some polymer insulating materials will be destroyed, the molecular chains will become loose, and the physical properties of the materials will change. In this case, the insulating layer may bulge, crack, etc., the surface flatness will be destroyed, and the roughness will naturally increase. The PLC controller 3 will control the micro-electric push rod 39 to drive the aging detection component 38 to move upward to the set position, so that the friction block 41 and the insulating layer on the surface of the wire drum 602 are in contact. Then the PLC controller 3 controls the drive motor 9 to work. Referring to the above principle, the detection cylinder 381 will be controlled to move to the left. Since the roughness of the surface of the insulating layer is relatively large at this time, the friction force between the friction block 41 and the insulating layer will cause the friction block 41 to drive the guide plate 40 and the block 382 to overcome the elastic force of the spring and move to a farther position to the right, so that the block 382 squeezes the trigger switch 42. The trigger switch 42 will control the warning light 43 to work through the PLC controller 3 to remind the operator that the wire drum 602 needs to be replaced.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A contactless power transmission device, comprising a base (1), a trolley (2) is placed above the base (1), a PLC controller (3) is fixedly connected to the upper side wall of the base (1), a power supply (4) with a power sensing element is provided inside the trolley (2), and a receiving coil assembly (5) is fixedly connected to the lower side wall of the trolley (2) via a bracket, characterized in that: Also includes: A plurality of transmitting coil assemblies (6) are fixedly connected to the upper side wall of the base (1), and the transmitting coil assemblies (6) and the receiving coil assemblies (5) cooperate with each other to supply power to the power source (4); A cooling component (14) is connected to the interior of the base (1), the base (1) being a hollow structure, and the cooling component (14) is arranged inside the base (1) and is used to reduce the temperature of the transmitting coil component (6) when it is in operation; A plurality of position limiting components (20) are arranged on the surface of the base (1) and are used to fix the position of the trolley (2) when charging; An aging detection component (38) is arranged inside the transmitting coil component (6) and is used to detect the aging condition of the coil inside the transmitting coil component (6).

2. A non-contact power transmission device according to claim 1, characterized in that: The transmitting coil assembly (6) comprises a coil box (601) and a wire reel (602), wherein the coil box (601) is fixedly connected to the upper side wall of the base (1), and the wire reel (602) is fixedly connected to the upper inner wall of the coil box (601); the lower inner wall of the coil box (601) is fixedly connected to a drive box (7); the inner wall of the drive box (7) is rotatably connected to a threaded rod (8); the right side wall of the drive box (7) is fixedly connected to a drive motor (9); the output end of the drive motor (9) passes through the side wall of the drive box (7) and is fixedly connected to the threaded rod (8); A threaded sleeve (10) is threadedly sleeved on the rod wall of the threaded rod (8); a guide frame (11) is fixedly connected to the upper side wall of the threaded sleeve (10); a guide opening matching the guide frame (11) is opened on the upper side wall of the drive box (7); the upper end of the guide frame (11) extends out of the guide opening and is fixedly connected to a conduction rod (12); the conduction rod (12) is electrically connected to an external power source (4); a plurality of conduction seats (13) are connected to the surface of the wire drum (602); the conduction seats (13) pass through the insulating layer of the wire drum (602) and are connected to the conductor inside the wire drum (602).

3. A non-contact power transmission device according to claim 1, characterized in that: The cooling component (14) comprises a water tank (141) and a pump (142); the water tank (141) is fixedly connected to the lower inner wall of the base (1); the liquid inlet end of the pump (142) is connected to the water tank (141); the liquid outlet end of the pump (142) is fixedly connected to a serpentine tube (15); the rear side wall of the base (1) is fixedly connected to a heat sink (16); the side wall of the heat sink (16) is fixedly connected to a plurality of heat sinks (17); One end of the serpentine tube (15) away from the pump (142) passes through the heat sink (17) and is connected to a cooling tube (18). The cooling tube (18) is arranged in a serpentine shape on the upper inner wall of the base (1), and one end of the cooling tube (18) away from the serpentine tube (15) is connected to the water tank (141). A temperature sensor (19) is fixedly connected to the inner wall of the base (1), and the temperature sensor (19) is electrically connected to the pump (142) via the PLC controller (3).

4. A non-contact power transmission device according to claim 1, characterized in that: The limiting assembly (20) comprises a plurality of elastic membranes (201) and a plurality of push plates (202). A plurality of grooves (21) are provided on both left and right sides of the upper surface of the base (1). The elastic membranes (201) are fixedly connected to the inner walls of the grooves (21). The push plates (202) are slidably arranged in the grooves (21). The lower side walls of the grooves (21) are fixedly connected to arc-shaped plates (22) matching the rollers of the trolley (2) on both left and right sides. The inner wall of the grooves (21) is fixedly connected to two piston cylinders (23). A lifting rod (24) is inserted into the piston cylinder (23). The upper ends of the two lifting rods (24) are fixedly connected to the lower side wall of the same push plate (202). The lower end of the lifting rod (24) is located in the piston cylinder (23) and is fixedly connected to the piston plate (25). A micro water pump (26) is fixedly connected to the lower side wall of the groove (21); a liquid inlet end of the micro water pump (26) passes through the side wall of the groove (21) and is in communication with the cooling pipe (18); a liquid outlet end of the micro water pump (26) is fixedly connected to a curved pipe (27); a control valve (28) is provided in the curved pipe (27); an end of the curved pipe (27) away from the micro water pump (26) is in communication with a piston cylinder (23) on one side; a pipe wall of the curved pipe (27) is in communication with a short pipe (29); an end of the short pipe (29) away from the curved pipe (27) is in communication with a piston cylinder (23) on the other side; a pressure sensing component (30) is provided in the groove (21); a same return pipe (47) is in communication between the liquid inlet end and the liquid outlet end of the micro water pump (26); and a magnetic control valve (48) is provided in the return pipe (47).

5. A non-contact power transmission device according to claim 4, characterized in that: The pressure sensing component (30) comprises a pressure cylinder (301) and a piston seat (302); the lower inner wall of the groove (21) is fixedly connected to a support frame (31) located outside the micro water pump (26); the pressure cylinder (301) is fixedly connected to the upper wall of the support frame (31); the inner wall of the pressure cylinder (301) is connected to the piston seat (302) via a spring; the piston seat (302) is slidably arranged in the pressure cylinder (301); the pressure cylinder (301) and the curved pipe (27) are fixedly connected to a same delivery pipe (32); the upper inner wall of the pressure cylinder (301) is fixedly connected to an extrusion switch (33); the extrusion switch (33) and the delivery pipe (32) are respectively located on two sides of the piston seat (302).

6. A non-contact power transmission device according to claim 2, characterized in that: The upper side wall of the coil box (601) is fixedly connected to a control switch (34), the control switch (34) being electrically connected to a drive motor (9) via a PLC controller (3), the upper side wall of the trolley (2) being fixedly connected to a microprocessor (35), the lower side wall of the trolley (2) being fixedly connected to a small electric push rod (36), the moving end of the small electric push rod (36) being fixedly connected to an extrusion plate (37), and the electric quantity sensing element inside the power source (4) being electrically connected to the small electric push rod (36) via the microprocessor (35).

7. A non-contact power transmission device according to claim 2, characterized in that: The aging detection component (38) comprises a detection cylinder (381) and a block (382); the upper side wall of the guide frame (11) is fixedly connected to a micro electric push rod (39); the moving end of the micro electric push rod (39) is fixedly connected to the lower side wall of the detection cylinder (381); the block (382) is fixedly connected to the inner wall of the detection cylinder (381) via a spring; the upper side wall of the block (382) is fixedly connected to a guide plate (40); the upper side wall of the guide plate (40) A detection cylinder (381) is extended and fixedly connected to a friction block (41); a trigger switch (42) is fixedly connected to the lower inner wall of the detection cylinder (381); a warning light (43) is provided on the upper wall of the coil box (601); the trigger switch (42) is electrically connected to the warning light (43) via a PLC controller (3); a gaussmeter (44) is fixedly connected to the lower wall of the coil box (601); and the gaussmeter (44) is electrically connected to the PLC controller (3).

8. A non-contact power transmission device according to claim 2, characterized in that: A guide slide cylinder (45) is fixedly connected to the lower side wall of the threaded cylinder (10), and a guide slide rod (46) matching the guide slide cylinder (45) is connected to the inner wall of the drive box (7).

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