Roller of solar cell wet process conveying device, conveying device and photovoltaic equipment

Abstract

The utility model relates to a roller of a solar cell wet process conveying device, the conveying device and photovoltaic equipment. The roller comprises a roller body and a microwave generator. The cylinder body is provided with a hollow part, and at least part of the cylinder body is used for being immersed in working liquid; a magnetron is arranged in the microwave generator, the microwave generator is connected to the cylinder body and located in the hollow part, and the microwave generator is used for enabling the cylinder body to vibrate and heating the working liquid through the cylinder body. The magnetron can generate vibration and emit microwaves under the action of a magnetic field and an electric field of the magnetron, and the microwaves can achieve heating. The roller provided with the microwave generator is installed on the conveying device and used for conveying the solar cell piece, the roller can directly heat the working solution around the solar cell piece, and therefore the temperature difference caused by up-and-down circulating conveying of the working solution can be avoided, and the working temperature of the working solution is guaranteed. Meanwhile, the roller can generate vibration, bubbles in the working solution are broken, and therefore the bubbles can be prevented from affecting treatment of the solar cell piece.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a roller, a conveying device and a photovoltaic device for a solar cell wet process conveying device. Background Art

[0002] During the wet process of treating solar cells, a roller conveyor transports the solar cells to the liquid medicine in the working tank for reaction treatment. Currently, the wet process machine is also equipped with multiple auxiliary tanks to achieve the circulation of liquid medicine between the working tank and the auxiliary tanks. During the circulation process, there is a temperature difference between the working liquid in the working tank and the auxiliary tank, making it difficult to ensure that the temperature of the liquid medicine in the working tank reaches the preset value. At the same time, a large number of bubbles will be generated in the liquid medicine circulating from the auxiliary tank. These bubbles will isolate local areas of the solar cell from contact with the liquid medicine, causing local reaction cessation and thus causing defects in the solar cell. Therefore, the related art has the problem of difficulty in ensuring the temperature of the liquid medicine and the problem of bubbles in the liquid medicine affecting the processing of solar cells. Utility Model Content

[0003] Based on this, it is necessary to provide a roller, conveying device and photovoltaic equipment for a solar cell wet process conveying device to address the problems in related technologies such as difficulty in ensuring the temperature of the chemical solution and the impact of chemical solution bubbles on the processing of solar cell panels.

[0004] In a first aspect, a roller of a solar cell wet process conveying device comprises:

[0005] a cylinder having a hollow portion and at least a portion thereof being immersed in the working fluid;

[0006] A microwave generator is provided with a magnetron inside. The microwave generator is connected to the cylinder and is located in the hollow portion. The microwave generator is used to vibrate the cylinder and heat the working fluid through the cylinder.

[0007] In one embodiment, the housing is provided with the hollow portion, and the housing is configured to be at least partially immersed in the working fluid;

[0008] an inner shaft passing through the hollow portion and extending out of both ends of the outer shell along its own length direction, the microwave generator being connected to the inner shaft;

[0009] The two transmission end covers can be rotatably sleeved on the inner shaft and respectively cover the two ends of the outer shell.

[0010] In one embodiment, the roller also includes a bearing, and each of the transmission end covers is penetrated by a first through hole for the inner shaft to pass through, the inner ring of the bearing is sleeved on the inner shaft, and the outer ring of the bearing is fixed on the hole wall of the first through hole.

[0011] In one embodiment, the transmission end cover includes a sealing portion and a transmission portion that are connected to each other. The sealing portion can be rotatably sleeved on the inner shaft and seal the two ends of the outer shell along its own length direction. The transmission portion is arranged on the side of the sealing portion away from the outer shell, and the transmission portion is used to drive the transmission end cover to rotate around the axis of the inner shaft.

[0012] In one embodiment, the cylinder further includes a through-hole slip ring, which is sleeved on the transmission end cover. The transmission end cover is provided with a wire through hole connected to the hollow portion. The wire entry end of the through-hole slip ring is sealed and passed through the wire through hole and is electrically connected to the microwave generator.

[0013] In a second aspect, a conveying device is provided, comprising a conveying assembly, wherein at least a portion of the conveying assembly is a roller as described in the first aspect, and the conveying device is used to convey solar cells into a working fluid.

[0014] In one embodiment, the conveying device further includes a frame and a driving assembly arranged on the frame, the conveying assembly includes multiple conveying assemblies, all of which are arranged on the frame at intervals along the conveying direction, and the driving assembly is used to drive the conveying assembly to rotate.

[0015] In one embodiment, each of the conveying assemblies includes a first conveying member and a second conveying member distributed along the height direction of the conveying device, and the first conveying member is located above the second conveying member and is used to clamp and convey the solar cell sheet between the first conveying member and the second conveying member;

[0016] Wherein, at least one of the first conveying member and the second conveying member is the roller.

[0017] A third aspect provides a photovoltaic device, comprising the conveying device according to the second aspect.

[0018] In one embodiment, the photovoltaic device further includes a first trough body, a second trough body and a circulation device. Along the height direction of the photovoltaic device, the first trough body is located on the top of the second trough body, the conveying device is arranged in the first trough body, and the circulation device is used to drive the working fluid to circulate between the first trough body and the second trough body.

[0019] The roller is equipped with a microwave generator and a magnetron. Under the control of its mutually perpendicular constant magnetic and electric fields, the magnetron's electrons interact with the high-frequency electromagnetic field, extracting energy from the constant electric field and converting it into microwave energy, thereby generating microwaves. Simultaneously, the electrons within the magnetron oscillate under the influence of the electromagnetic field. This oscillation causes the magnetron as a whole to vibrate, resonating the microwave generator. Thus, the microwave generator has both heating and vibrating functions. The roller equipped with the microwave generator is mounted on a conveyor device for transporting solar cells. The roller directly heats the working fluid surrounding the solar cells, thereby avoiding temperature differences caused by circulating the working fluid and maintaining the working fluid's operating temperature. Simultaneously, the roller vibrates, bursting bubbles in the working fluid and preventing them from interfering with the processing of the solar cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a roller provided in an embodiment of the present application.

[0021] Figure 2 A schematic diagram of a portion of the structure of the photovoltaic device provided in an embodiment of the present application.

[0022] Explanation of the accompanying drawings: 10. Conveying device; 1. Frame; 2. Roller; 21. Cylinder; 211. Outer shell; 212. Inner shaft; 213. Transmission end cover; 2131. Sealing part; 2132. Transmission part; 22. Microwave generator; 23. Through-hole slip ring; 3. Conveying assembly; 31. First conveying member; 32. Second conveying member; 20. First trough body. DETAILED DESCRIPTION

[0023] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0024] There are problems in the related art that it is difficult to ensure the temperature of the liquid medicine and that the bubbles in the liquid medicine affect the processing of solar cells. Specifically, at present, the wet process machine mainly realizes the circulation of the liquid medicine through the working tank and the bottom tank. The bottom tank is located at the bottom of the working tank. A heater is provided in the bottom tank. After the liquid medicine is heated, it is pumped from bottom to top into the working tank. During the pumping process, the mechanical energy of the circulation pump is converted into thermal energy, which will make the temperature of the liquid just transported to the working tank higher than the temperature in the bottom tank, making it difficult to ensure that the temperature of the liquid medicine in the working tank reaches the preset value; at the same time, a large number of bubbles will be generated in the liquid medicine pumped from the bottom tank. The bubbles will isolate the local position of the solar cell from the contact with the liquid medicine, causing the local reaction to stop, and then causing defects in the solar cell. Therefore, there are problems in the related art that it is difficult to ensure the temperature of the liquid medicine and that the bubbles in the liquid medicine affect the processing of the solar cell.

[0025] See also Figure 1 and Figure 2 , Figure 1 This is a schematic structural diagram of a roller 2 provided in an embodiment of the present application. Figure 2 This is a partial structural diagram of a photovoltaic device provided in an embodiment of the present application. To address this issue, in a first aspect, an embodiment of the present application provides a roller 2 for a wet process conveying device for solar cells. The roller 2 comprises a cylindrical body 21 and a microwave generator 22. The cylindrical body 21 has a hollow portion, at least partially immersed in a working fluid. The microwave generator 22 houses a magnetron, connected to the cylindrical body 21 and located within the hollow portion. The microwave generator 22 is configured to vibrate the cylindrical body 21 and heat the working fluid through the cylindrical body 21. The roller 2 is provided with a microwave generator 22. The microwave generator 22 houses a magnetron. Under the control of its mutually perpendicular constant magnetic and electric fields, the magnetron's electrons interact with a high-frequency electromagnetic field, extracting energy from the constant electric field and converting it into microwave energy, thereby generating microwaves. Simultaneously, the electrons within the magnetron oscillate under the influence of the electromagnetic field. This oscillation causes the magnetron to vibrate as a whole, resonating the microwave generator. Thus, the microwave generator has both heating and vibration functions. A roller 2 equipped with a microwave generator 22 is mounted on a conveyor 10 to transport solar cells. The roller 2 directly heats the working fluid surrounding the solar cells, thereby avoiding temperature differences caused by circulating the working fluid and maintaining the working fluid's operating temperature. Simultaneously, the roller 2 vibrates, bursting bubbles within the working fluid and preventing them from affecting the handling of the solar cells.

[0026] It should be noted that the microwave generator 22 in the embodiment of the present application can be purchased directly from the market, and microwave generators 22 with preset microwave frequencies and preset heating temperatures are available. In the embodiment of the present application, the microwave generator 22 has a microwave frequency of 2400 MHz to 2500 MHz. Microwave frequencies within this range are low-frequency microwaves, which can cause the roller 2 to vibrate without affecting the conveyance of the solar cell panels and preventing the solar cell panels from shifting during the vibration process. The heating temperature of the microwave generator 22 can be set within the range of 25°C to 50°C to ensure the reaction temperature of the working fluid.

[0027] For example, the microwave frequency can be any value within the above range, for example, 2400 MHz, 2425 MHz, 2450 MHz, 2475 MHz, 2500 MHz, etc. The heating temperature can be any value within the above range, for example, 25°C, 30°C, 35°C, 40°C, 45°C, 50°C, etc.

[0028] See also Figure 1 , the structure of the roller 2 will be described in detail below.

[0029] Alternatively, the shaft heads may be directly welded to both ends of the cylinder 21 on the outside of the cylinder 21. Alternatively, the cylinder 21 may be formed with the shaft heads by assembling the inner shaft 212 that passes through the hollow portion thereof.

[0030] Specifically, in some embodiments, the cylinder 21 further includes an outer shell 211, an inner shaft 212, and two transmission end caps 213. The outer shell 211 has a hollow portion and is at least partially immersed in the working fluid. The inner shaft 212 extends through the hollow portion and extends out of the outer shell at both ends along its length. The microwave generator 22 is connected to the inner shaft 212. The two transmission end caps 213 are rotatably sleeved onto the inner shaft 212 and respectively cover the ends of the outer shell. Because the inner shaft 212 extends through the entire hollow portion of the cylinder 21, it supports the outer shell 211 and the microwave generator 22, effectively distributing the overall load of the roller 2 and ensuring a more uniform force on the roller 2.

[0031] Optionally, the transmission end cover 213 may be inserted into the hollow portion of the housing 211 through an interference fit; alternatively, the transmission end cover 213 may be welded to the housing 211; alternatively, the transmission end cover 213 may be fixed to the housing 211 via fasteners such as studs or screws. The embodiment of the present application does not limit the connection method between the transmission end cover 213 and the housing 211, and the connection method may be selected according to the processing technology.

[0032] Alternatively, the transmission portion of the roller 2 can be formed directly by the housing 211 itself, for example, by forming a recessed groove in the housing 211, and then inserting a round belt into the groove to rotate the roller 2. Alternatively, the transmission portion of the roller 2 can be provided outside the housing 211, for example, at both ends of the housing 211 facing away from the housing.

[0033] In some embodiments, the transmission end cover 213 includes a connected cover portion 2131 and a transmission portion 2132. Each cover portion 2131 is rotatably sleeved on the inner shaft 212 and covers both ends of the outer shell 211 along its own length. The transmission portion 2132 is located on the side of the cover portion 2131 facing away from the outer shell 211 and is used to drive the transmission end cover 213 to rotate about the axis of the inner shaft 212. The external transmission portion 2132 can reduce the length of the outer shell 211. The transmission portion 2132 is independent of the outer shell 211, which can avoid affecting the integrity of the outer shell 211 and improve the structural strength and stability of the outer shell 211.

[0034] Optionally, the transmission portion 2132 may be provided with a sprocket capable of cooperating with a chain to rotate the roller 2 about the inner shaft 212. The number of sprockets may be one or two, and the two sprockets may be arranged side by side along the axial direction of the roller 2. Alternatively, the transmission portion 2132 may be provided with a synchronous pulley capable of cooperating with a synchronous belt to rotate the roller 2 about the inner shaft 212. The number of synchronous pulleys may be one or two, and the two synchronous pulleys may be arranged side by side along the axial direction of the roller 2. Alternatively, the transmission portion 2132 may be provided with a poly-V belt groove capable of cooperating with a poly-V belt to rotate the roller 2 about the inner shaft 212. The number of poly-V belt grooves may be one or two, and multiple poly-V belt grooves may be arranged side by side along the axial direction of the roller 2.

[0035] Alternatively, a clearance fit may be directly formed between the transmission end cover 213 and the inner shaft 212 to enable relative rotation, or a bearing may be provided between the transmission end cover 213 and the inner shaft 212 to enable rotation. The latter is preferred. In some embodiments, the transmission end cover 213 is provided with a first through hole for the inner shaft 212 to pass through. The inner ring of the bearing is sleeved on the inner shaft 212, and the outer ring of the bearing is fixed to the wall of the first through hole. The addition of the bearing can reduce friction and improve the rotational flexibility of the roller 2.

[0036] In some embodiments, the cover portion 2131 of the transmission end cap 213 is provided with a first sub-hole, and the transmission portion 2132 is provided with a second sub-hole. The first sub-hole and the second sub-hole are connected to form a first through-hole, and the outer ring of the bearing is fixed to the wall of the second sub-hole. Since the transmission portion 2132 is primarily used to realize the rotation of the roller 2, arranging the bearing near the transmission portion 2132 can improve transmission efficiency.

[0037] In some embodiments, the drum 21 further includes a through-hole slip ring 23, which is sleeved onto a transmission end cap 213. The transmission end cap 213 has a wire hole connected to the hollow portion. The wire input end of the through-hole slip ring 23 is sealed and passed through the hole and electrically connected to the microwave generator 22. The through-hole slip ring 23 prevents wiring from becoming entangled during the rotation of the roller 2. The wire output end of the through-hole slip ring 23 is electrically connected to a repeater, which improves current transmission efficiency.

[0038] In some embodiments, taking the example of providing a sprocket on the transmission part 2132 , the through-hole slip ring 23 is sleeved on the transmission part 2132 and located between the cover part 2131 and the sprocket of the transmission part 2132 .

[0039] Second, see Figure 2 The present invention also provides a conveying device 10. The conveying device 10 can be linear, curving, retractable, foldable, lifting, or climbing. The present invention does not limit the specific form of the conveying device 10.

[0040] In some embodiments, the conveying device 10 includes a conveying assembly 3, at least partially comprising the rollers 2 of the first aspect. The conveying device 10 is used to convey solar cells into the working fluid. In other words, in one embodiment, a portion of the conveying assembly 3 may comprise rollers 2 equipped with microwave generators 22, while another portion may comprise conventional rollers without microwave generators 22. Alternatively, in another embodiment, all of the conveying assembly 3 may comprise rollers 2 equipped with microwave generators 22. During operation of the conveying device 10, the rollers 2 equipped with microwave generators 22 may be selectively activated, i.e., the rollers 2 may be fully or partially activated.

[0041] See also Figure 2 In some embodiments, the conveying device 10 further includes a frame 1, and the conveying assembly 3 includes multiple conveying assemblies 3, all of which are along the conveying direction (such as Figure 2 The conveying device 10 can be configured for single-layer or double-layer conveying. In single-layer conveying, each conveying assembly 3 refers to a roller in the single layer, which can be a roller 2 equipped with a microwave generator 22 or a conventional roller. In double-layer conveying, each conveying assembly 3 refers to a group of corresponding upper and lower rollers, with none, one, or both of the rollers being rollers 2 equipped with a microwave generator 22.

[0042] In some embodiments, each conveying assembly 3 includes a Figure 2The conveyor device 10 includes a first conveyor member 31 and a second conveyor member 32 (direction AA shown). The first conveyor member 31 is positioned above the second conveyor member 32 and is used to clamp and transport the solar cell between the first conveyor member 31 and the second conveyor member 32. At least one of the first conveyor member 31 and the second conveyor member 32 is a roller 2. Because the solar cell needs to be immersed in the working fluid for reaction processing, a position restraint is required to prevent the solar cell from floating due to buoyancy. Preferably, the conveyor device 10 has a double-layer structure. During operation, the second conveyor member 32 is immersed in the working fluid, and the first conveyor member 31 is at least partially immersed in the working fluid. This ensures that the solar cell between the second conveyor member 32 and the first conveyor member 31 is fully in contact with the working fluid.

[0043] In some embodiments, the conveying device 10 further includes a drive assembly disposed on the frame 1. The drive assembly is configured to drive the conveying assembly 3 to rotate. Specifically, the drive assembly includes a driver, a transmission member, and a rotating member. The driver is disposed on the frame 1, with the driver's output end connected to the rotating member. The transmission member is tensioned around the rotating member and the transmission portion 2132 of the roller 2. The driver drives the rotating member to rotate, which in turn causes the transmission member to drive the roller 2 to rotate relative to the frame 1.

[0044] Optionally, the driver is a servo motor or a stepper motor. Corresponding to the transmission portion 2132 of the roller 2, when a sprocket is provided on the transmission portion 2132 of the roller 2, the transmission member is a chain, and the rotating member is a sprocket. When a synchronous pulley is provided on the transmission portion 2132 of the roller 2, the transmission member is a synchronous belt, and the rotating member is a synchronous pulley. When a poly-V belt groove is provided on the transmission portion 2132 of the roller 2, the transmission member is a poly-V belt, and the rotating member is a poly-V pulley.

[0045] In a third aspect, embodiments of the present application further provide a photovoltaic device comprising the conveying device 10 described in the second aspect. The photovoltaic device may be a wet etching device or a wet cleaning device. The operation of the photovoltaic device is automated by a PLC (Programmable Logic Controller) control system to control the operation of the conveying device 10.

[0046] For some examples, see Figure 2 The photovoltaic device further comprises a first tank body 20, a second tank body and a circulation device, along the height direction of the photovoltaic device (such as Figure 2In the AA direction shown in FIG. 1 , the first tank body 20 is located on top of the second tank body. The conveying device 10 is located within the first tank body 20. The circulation device is used to circulate the working fluid between the first tank body 20 and the second tank body. The presence of the circulation device and the second tank body facilitates the flow of the working fluid, ensuring thorough and uniform mixing of solutes in the working fluid, reducing concentration variations in the working fluid, and promoting uniform reaction across the solar cell panel. Optionally, the circulation device can be a centrifugal pump or a mixed-flow pump.

[0047] Furthermore, a temperature sensor is provided in the first tank 20 to detect the temperature of the working fluid in the first tank 20. When the temperature detected is lower than the preset heating temperature, the temperature sensor converts the temperature signal into an electrical signal and transmits it to the PCL control system, which controls the microwave generator 22 in the roller 2 to start heating. When the temperature detected is higher than the preset heating temperature, the microwave generator 22 in the roller 2 is controlled to stop heating.

[0048] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0049] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0050] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0051] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0052] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0053] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A roller (2) of a solar cell wet process conveying device, characterized in that: include: A cylinder (21) is provided with a hollow portion, and at least a portion of the cylinder (21) is used to be immersed in the working fluid; A microwave generator (22) is provided with a magnetron therein. The microwave generator (22) is connected to the cylinder (21) and is located in the hollow portion. The microwave generator (22) is used to vibrate the cylinder (21) and heat the working fluid through the cylinder (21).

2. The roller (2) according to claim 1, characterized in that The cylinder (21) comprises: A housing (211) is provided with the hollow portion, and the housing (211) is used to be at least partially immersed in the working fluid; An inner shaft (212) is provided through the hollow portion and extends out of both ends of the outer shell (211) along its own length direction, and the microwave generator (22) is connected to the inner shaft (212); The two transmission end covers (213) are both rotatably sleeved on the inner shaft (212) and respectively cover the two ends of the outer shell (211).

3. The roller (2) according to claim 2, characterized in that The roller (2) further comprises a bearing, and each of the transmission end covers (213) is provided with a first through hole for the inner shaft (212) to pass through, the inner ring of the bearing is sleeved on the inner shaft (212), and the outer ring of the bearing is fixed to the hole wall of the first through hole.

4. The roller (2) according to claim 2, characterized in that The transmission end cover (213) comprises a cover portion (2131) and a transmission portion (2132) connected to each other. The cover portion (2131) can be rotatably sleeved on the inner shaft (212) and covers both ends of the outer shell (211) along its own length direction. The transmission portion (2132) is arranged on a side of the cover portion (2131) away from the outer shell (211). The transmission portion (2132) is used to drive the transmission end cover (213) to rotate around the axis of the inner shaft (212).

5. The roller (2) according to claim 2, characterized in that The cylinder (21) further includes a through-hole slip ring (23), which is sleeved on the transmission end cover (213). The transmission end cover (213) is provided with a wire hole communicating with the hollow portion. The wire entry end of the through-hole slip ring (23) is sealed and passed through the wire hole and is electrically connected to the microwave generator (22).

6. A conveying device (10), characterized in that: The conveying device (10) comprises a conveying assembly (3), at least part of which is a roller (2) according to any one of claims 1 to 5, and the conveying device (10) is used to convey solar cells into the working fluid.

7. The conveying device (10) according to claim 6, characterized in that The conveying device (10) further comprises a frame (1) and a driving assembly arranged on the frame (1); the conveying assembly (3) comprises a plurality of conveying assemblies, all of which are arranged on the frame (1) at intervals along a conveying direction; and the driving assembly is used to drive the conveying assemblies (3) to rotate.

8. The conveying device (10) according to claim 7, characterized in that Each of the conveying assemblies (3) comprises a first conveying member (31) and a second conveying member (32) distributed along the height direction of the conveying device (10), and the first conveying member (31) is located above the second conveying member (32) and is used to clamp and convey the solar cell sheet between the first conveying member (31) and the second conveying member (32); Wherein, at least one of the first conveying member (31) and the second conveying member (32) is the roller (2).

9. A photovoltaic device, characterized in that: The photovoltaic device comprises the conveying device (10) according to any one of claims 6 to 8.

10. The photovoltaic device according to claim 9, characterized in that The photovoltaic device further comprises a first trough body (20), a second trough body and a circulation device. Along the height direction of the photovoltaic device, the first trough body (20) is located on the top of the second trough body, the conveying device (10) is arranged in the first trough body (20), and the circulation device is used to drive the working fluid to circulate between the first trough body (20) and the second trough body.

Images