Novel anti-wrinkle circulating belt and photovoltaic module laminating machine

Abstract

The utility model provides a novel anti-wrinkle circulating belt for a laminating machine and the laminating machine using the circulating belt, aiming at overcoming the defect that in the prior art, the circulating belt of the laminating machine is easy to generate wrinkles when being tensioned in a transmission process, so that normal laminating production cannot be carried out, and the utility model provides the anti-wrinkle circulating belt and the laminating machine using the same. The photovoltaic module laminating machine comprises a circulating belt and a circulating belt transmission device, the circulating belt is used for transmitting a battery module, isolating the battery module from a laminating component during laminating and supporting the battery module, and the circulating belt transmission device is used for transmitting the battery module and supporting the laminating component during laminating. By adopting the anti-wrinkle circulating belt and the laminating machine using the circulating belt, the technical problem which is troubled for a long time in the field is solved, an unexpected technical effect is achieved, wrinkles generated when the circulating belt passes through a shaft can be reduced or eliminated, and the circulating belt in the laminating machine is free of wrinkles.

Description

Technical Field

[0001] The utility model relates to a photovoltaic laminator and a circulating belt used therefor. Background Art

[0002] As a green new energy source, solar power generation plays an important role in the process of achieving carbon neutrality, and its technology is developing rapidly. Solar cell modules are the core components in the field of solar power generation, and laminators are the core equipment for encapsulating solar cell modules; among them, the transmission system is an important part of the laminator. The performance of the transmission mechanism affects the production efficiency of the laminator. Due to the special structure of the laminator, the circulating belt needs to support the cell module during the lamination process. The circulating belt serves as both a carrier and an isolator for the cell module, is an important component in the cell module transmission system, and is also an important component participating in the lamination of the cell module during lamination. Therefore, the performance of the circulating belt affects the performance of the transmission mechanism and the laminator, and even affects whether the laminator can work properly.

[0003] With the continuous increase in the size of photovoltaic modules and the acceleration of the front-end beat, the laminator has become a key bottleneck equipment restricting the production capacity of the module encapsulation line. At present, there are two methods to solve this problem. One is to increase the cavity area of the traditional laminator so that more photovoltaic modules can be accommodated in the cavity to improve the production capacity of the laminator. The other is to develop a new type of multi-layer laminator, in which two or more vertically arranged lamination main machines work together at a time to improve the production capacity of the laminator.

[0004] The transmission structure used in traditional laminators on the market at present is shown in Figures 1 - 2, including two sets of endless belt transmission structures, namely the upper endless belt transmission structure and the lower endless belt transmission structure. The upper endless belt transmission structure and the lower endless belt transmission structure are the same, and both are composed of a driving device 8, a shaft group 1, a cross beam 2, and chains 5 located on the left and right sides of the laminator. Usually, a Teflon fiberglass cloth is used as the endless belt 3. The shaft group is arranged at the front and rear ends of the laminating workbench. A heating plate 6 is fixedly arranged on the laminating workbench, and an upper box 4 is arranged above the laminating workbench. Sprockets are respectively arranged on both sides of each shaft of the shaft group. The chain is sleeved on the sprockets 12 arranged on the corresponding side of the shaft group 1; both ends of the cross beam 2 are respectively fixedly connected to the chains 5 on the corresponding sides. The width direction of the endless belt 3 is parallel to the length direction of the cross beam 2. The cross beam 2 connects the ends of the endless belt to support the entire width direction of the endless belt. Both ends of the cross beam 2 are respectively connected to the chains on the corresponding sides. The driving device 8 is connected to a transmission shaft. While driving the transmission shaft to rotate, it drives the sprockets to rotate, drives the chain to perform a cyclic operation, and drives the endless belt to respectively perform a cyclic operation around the laminating workbench and the upper box 4. The cyclic automatic transmission of the photovoltaic module is realized through the operation of the lower endless belt, and the laminating components are isolated by the upper endless belt. The upper endless belt is circulated to the cleaning device to obtain cleaning. For the endless belt transmission structure with the above structure, the upper endless belt and the lower endless belt are set in a relaxed state, and the cross beam pulls the endless belt to perform a cyclic movement. During the transmission process, the upper endless belt, the lower endless belt, and the battery module are all located above the heating plate (06). The movement directions of the three are the same and the relative speed is zero. The upper endless belt and the battery module are basically not misaligned. After the glue overflowing from the edge of the battery module adheres to the upper endless belt, it will not scrape the battery module, so it will not cause pollution to the battery module. As the specifications of the battery modules are getting larger and larger, the sizes of the heating plate 6 and the upper box 4 of the traditional laminator are also continuously increasing. The overall size of the laminator, the length of the chain 5, and the size of the endless belt 3 are all increasing rapidly, resulting in a multiple increase in the manufacturing and assembly cumulative errors of the transmission structure. Since the Teflon fiberglass cloth used as the endless belt 3 is flexible, when the endless belt performs a cyclic movement under the traction of the cross beam, it is pulled and tightened by the cross beam, causing the endless belt to move on the cloth-passing shaft of the cross beam, resulting in wrinkles on the endless belt, making the endless belt uneven. When laminating the battery module, the wrinkles affect the quality of the photovoltaic module and seriously affect production.

[0005] At present, another means to improve the production capacity of the laminator is to use a multi-layer laminator. In a multi-layer laminator, each layer of the laminator is equipped with its own transmission mechanism to transmit the photovoltaic module. The structural form of its transmission mechanism is as Figure 3-As shown in Figure 4: The transmission structure of each layer of the laminator is consistent, and is composed of a driving device 8, a shaft group 1, a circulating belt 3, etc.; the circulating belt is sleeved on the shaft group 1, and the driving device 8 is connected to the driving shaft in the shaft group 1. The driving shaft of the shaft group 1 is driven to rotate and drive the circulating belt 3 to perform an overall circulating motion. The other shafts in the shaft group 1 are follower shafts, which rotate with the circulating belt under the action of friction. In the structure of this multi-layer laminating machine, since the upper box of the lower laminating main machine and the heating plate of the upper laminating main machine are an integrated structure, the lower circulating belt of the upper laminating main machine is the upper circulating belt of the lower laminating main machine, and each circulating belt serves as the lower circulating belt of the upper laminating main machine and the upper circulating belt of the lower laminating main machine. Therefore, the circulating belts are not divided into upper and lower, and the circulating belts are connected by connecting parts to form an annular belt. Since the circulating belts are cyclically movable, the lower circulating part 31 of the circulating belt of the upper laminating main machine and the upper circulating part 32 of the circulating belt of the lower laminating main machine are opposite in conveying direction. Therefore, it is required that the lower circulating part 31 of the circulating belt of the upper laminating main machine must be completely separated from the components and the upper circulating part 32 of the lower laminating main machine during transmission to avoid the lower circulating part 31 of the circulating belt of the upper laminating main machine scraping the unlaminated components out of place during transmission, or scraping the glue overflowing from the edge of the laminated components onto the surface of the components to cause contamination. In order to separate the circulating belts of adjacent laminating machines, the circulating belt 3 needs to be operated in a tensioned state during the transmission process. Since the circulating belt 3 is flexible, the tension force causes wrinkles and deviation when the circulating belt 3 passes through the transmission shaft, making the transmission impossible. The wrinkles during lamination affect the quality of the battery components, and the lamination production cannot be carried out normally, which limits the application of this type of multi-layer laminator. Utility Model Content

[0006] The utility model aims to provide an anti-wrinkle circulating belt and a laminating machine using the circulating belt to solve the problem that wrinkles are easily generated when the circulating belt of the prior art laminating machine is tightened during the transmission process, so that normal lamination production cannot be performed.

[0007] The utility model is completed by the following technical solutions:

[0008] A novel anti-wrinkle circulating belt for a laminating machine comprises a circulating belt body, wherein at least one stress relief hole setting area is arranged on the circulating belt body, the stress relief hole setting area extends along the width direction of the circulating belt body, and the stress relief holes are multiple and distributed in the stress relief hole setting area along the width direction of the circulating belt body;

[0009] The stress relief hole arrangement areas are arranged in groups, or arranged in pairs of two, or arranged individually, or arranged in pairs of two and arranged individually, or the width of the stress relief hole arrangement area is less than or equal to 500 mm and greater than 0 mm;

[0010] The stress-relieving holes are one of circular, triangular, regular polygon, rectangular, oblong, rhombic or elliptical; or a combination of holes of any two or more shapes;

[0011] The pitch of the stress-relieving holes is not greater than 500 mm; and / or the size of the stress-relieving holes is such that the length is not greater than 300 mm, the width is not greater than 100 mm, or the diameter is not greater than 200 mm; and / or the hole density is not greater than 100 per square meter;

[0012] When the stress-relieving holes are oblong, elliptical or rhombic, the length direction of the holes is perpendicular to the arrangement direction of the holes;

[0013] The area where the stress-relieving holes are provided is located at one end or both ends of the loop belt body. When the stress-relieving holes are provided at both ends of the loop belt, the arrangement directions of the stress-relieving holes at both ends of the loop belt are parallel;

[0014] The loop belt is made of a flexible material and is used to carry and transport battery modules.

[0015] A photovoltaic module laminator includes a lamination main machine, the lamination main machine includes a loop belt and a loop belt driving device, the loop belt is driven to run by the loop belt driving device, the loop belt is fixedly connected to a traction device in the width direction and is pulled forward by the traction device, the traction device is connected to and driven by the loop belt driving device, the loop belt adopts the aforementioned new anti-wrinkle loop belt, and the area where the stress-relieving holes are provided is located on one side or both sides of the connection part between the traction device and the loop belt, or at the connection part;

[0016] It includes an upper box and a lower box. The loop belt includes an upper loop belt that runs around the upper box and a lower loop belt that runs around the lamination workbench. The upper loop belt is used to isolate the battery module and the lamination components during lamination, and the lower loop belt is used to transport the battery module and support the battery module during lamination. One loop belt driving device is correspondingly provided for one loop belt. The loop belt driving device includes a sprocket, a chain, a driving device and a shaft group. One shaft in the shaft group serves as the driving shaft, the driving device is connected to the driving shaft in the shaft group, sprockets are respectively provided at both ends of the shaft, the chain is sleeved on the sprockets, the traction device is a cross beam, both ends of the cross beam are fixedly connected to the corresponding side chains respectively, the loop belt is fixedly connected to the cross beam in the entire width direction, the driving device drives the driving shaft to rotate so as to drive the chain and the loop belt to circulate, and the shaft group of the lower loop belt supports the lower loop belt to run around the lamination workbench, and the shaft group of the upper loop belt supports the upper loop belt to run around the upper box;

[0017] The described endless belt drive device includes sprockets, drive spindles, a drive device, and two parallel chains. The endless belt runs around the laminating table under the support of the shaft group. Sprockets are rotatably arranged on both sides at both ends of the laminating table. The chains are sleeved on the sprockets on the corresponding sides. The chains on both sides are parallel and run synchronously. The traction device is a crossbeam. Both ends of the crossbeam are fixedly connected to the chains on the corresponding sides. At least one sprocket is coaxially connected through a drive spindle. The drive device is fixedly connected to the drive spindle. The drive device drives the chains to run by driving the drive spindle, thereby driving the crossbeam to traction the endless belt to run. It also includes an endless belt tensioning device. The endless belt tensioning device includes the shaft group. The shaft group includes a fixed tensioning shaft, a movable tensioning shaft, a tensioning component, and a guiding device. The fixed tensioning shaft is sleeved outside the drive spindle and is rotatably connected to the drive spindle. The movable tensioning shaft is rotatably connected to the bracket. The bracket is slidably arranged on the shaft group support frame or on the machine body. One end of the tensioning component is fixedly connected to the bracket, and the other end is fixedly connected to the shaft group support frame or the machine body. The guiding device is a chute or a slide rail arranged on the shaft group support frame. The bracket is slidably or rollably connected to the chute or the slide rail. The tensioning component provides a tensioning force for the tensioning shaft;

[0018] The described tensioning device includes a tensioning component and a guiding device. The tensioning shaft is rotatably arranged on the bracket. The bracket is slidably arranged on the shaft group support frame. The guiding device includes a chute or a slide rail. The bracket is slidably or rollably connected to the chute or the slide rail, thereby realizing the sliding connection between the bracket and the shaft group support frame. One end of the tensioning component is fixedly connected to the bracket, and the other end is fixedly connected to the shaft group support frame;

[0019] The tensioning component is a cylinder or a spring;

[0020] A flexible connection device is arranged between the crossbeam and the endless belt, and the two are fixedly connected through the flexible connection device;

[0021] The flexible connection device is a flexible connecting piece. One end of the connecting piece is provided with a collar, and it is sleeved and connected with the sleeve rod of the crossbeam through the collar. The other end is directly fixedly connected to the endless belt. Or the flexible connection device includes a plurality of rigid connecting pieces and a transition connection device. The transition connection device includes an auxiliary sleeve rod and a flexible kit. One end of the flexible kit is sleeved and connected with the auxiliary sleeve rod, and the other end is fixedly connected to the endless belt. The flexible kit and the rigid connecting pieces are alternately arranged on the auxiliary sleeve rod. Through holes or rings are arranged at both ends of the rigid connecting piece. One end is sleeved and connected with the sleeve rod through the through hole or the ring, and the other end is sleeved and connected with the auxiliary sleeve rod through the through hole or the ring;

[0022] Both sides of the crossbeam are fixedly connected to the chains on the corresponding sides through connecting seats to support the crossbeam so that it is higher than the top surface of the shaft group when passing through the shaft group;

[0023] Flexible connection devices are respectively arranged on both sides of the crossbeam and fixedly connected to the circulating belt. The total lengths of the flexible connection devices on both sides are equal, so that the projection of the flexible connection devices and the circulating belt located between the flexible connection devices on both sides forms an isosceles triangle, or the total lengths of the flexible connection devices on both sides are not equal, so that the projection of the flexible connection devices and the circulating belt located between the flexible connection devices on both sides forms a non-isosceles triangle;

[0024] The shortest distance from the center of the stress-reducing hole to the side part of the connection part is less than or equal to 1.5 meters or less than or equal to 0.1 meter and greater than 0 meter;

[0025] The traction device is arranged between every two adjacent stress-reducing hole setting areas arranged in pairs, and / or the traction is arranged beside each individually arranged stress-reducing hole setting area, and / or, the stress-reducing hole setting area is located at the end of the circulating belt, and the traction device is connected to the end of the circulating belt;

[0026] The laminator is a multi-layer laminator. Each layer of laminating main machine includes a laminating workbench, and the laminating workbenches of each layer of laminating main machines are arranged up and down.

[0027] A photovoltaic module laminator includes a circulating belt and a circulating belt transmission device. The circulating belt is used to transport battery modules and isolate the battery modules from the laminating components during lamination, and support the battery modules. The circulating belt transmission device includes a driving device and a shaft group. The shaft group includes a transmission shaft and a tensioning shaft. The shaft group supports the circulating belt to run around the laminating workbench. The tensioning shaft tensions the circulating belt under the action of a tensioning device so that the circulating belt is tensioned and sleeved on the shaft group. The driving device is connected to a transmission shaft, and the driving device drives the transmission shaft to rotate so as to drive the circulating belt to run. The stress-reducing holes are arranged on one side or both sides of the connection part at the joint of the circulating belt, or at the joint of the circulating belt;

[0028] The laminator is a multi-layer laminator. Each layer of laminator includes a laminating workbench and the circulating belt and the circulating belt transmission device. The laminating workbenches of each layer of laminating main machines are arranged up and down. The laminating workbench of each layer of laminating main machine also serves as the upper cover of the laminating main machine located in the lower layer.

[0029] The device of the present utility model has the following advantages:

[0030] The circulating belt for a laminator adopting the structure of the present utility model has a stress reduction hole setting area provided on the circulating belt. A plurality of stress reduction holes are arranged along the width direction of the circulating belt within the stress reduction hole setting area. The stress reduction hole setting area and the area of its edges are used to connect with the cross beam. When the present circulating belt is used for transmission, the stress reduction holes are located at or beside the connection part between the circulating belt and the cross beam and are distributed along the length direction of the cross beam. When the circulating belt is tightened, the stress reduction holes absorb the tensile stress generated, so that no wrinkles are generated on the circulating belt. Therefore, the major technical problem that the multi-layer laminator in the prior art cannot be actually used for laminating production is solved. By adopting a simple structure, the technical problem that has long troubled this field is solved, and unexpected technical effects are achieved.

[0031] For the laminator adopting the structure of the present utility model, since a stress reduction hole setting area is provided at the part where the circulating belt is connected to the traction device or beside the connection part between the circulating belt and the cross beam, when the circulating belt is tightened by the tensile force of the traction device, the stress reduction holes within the stress reduction hole setting area absorb the tensile stress generated when the circulating belt is tightened. Therefore, it is not easy to generate wrinkles on the circulating belt.

[0032] For the laminator adopting the structure of the present utility model, since a stress reduction hole setting area is provided on one side or both sides of the joint part of the circulating belt and / or at the joint part. Generally, the joint part of the circulating belt is near the shafts at the front and rear ends of the laminator outside the lamination cavity during lamination. Therefore, the wrinkles generated when the circulating belt passes over the shaft can be reduced or eliminated, so that there are no wrinkles on the circulating belt within the laminator. Description of the Drawings

[0033] Figure 1 is a schematic structural diagram of an embodiment of the transmission mechanism of a traditional laminator of the present utility model in the prior art, which includes an upper circulating belt transmission device and a lower circulating belt transmission device;

[0034] Figure 2 is Figure 1 a top view schematic diagram of;

[0035] Figure 3 is a schematic structural diagram of an embodiment of the transmission device of a multi-layer laminator of the present utility model in the prior art.

[0036] Figure 4a is Figure 3 a top view schematic diagram of;

[0037] Figure 4b is a schematic structural diagram of an embodiment of a tensioning shaft;

[0038] Figure 4c is a schematic cross-sectional view of an embodiment of a tensioning shaft;

[0039] Figure 5 is a schematic structural diagram of an embodiment of the transmission device of a multi-layer laminator of the present utility model;

[0040] Figure 6 is Figure 5 a schematic top view;

[0041] Figure 7a is a schematic partial structure view of the transmission device of a photovoltaic module laminator adopting the circulating belt structure of the present utility model;

[0042] Figure 7b is Figure 7a a schematic top view, showing the position area of the stress-relieving holes;

[0043] Figure 8 is a schematic structure view of an embodiment of the shape of the stress-relieving holes;

[0044] Figure 9 is an analysis diagram of the principle that the stress-relieving holes of the present utility model can prevent wrinkles from occurring, which is the force analysis of the circulating belt under ideal conditions;

[0045] Figure 10 is an analysis diagram of the principle that the stress-relieving holes of the present utility model can prevent wrinkles from occurring, among which is the force analysis of the circulating belt under normal working conditions;

[0046] Figure 11 is Figure 5 a schematic structure view of an embodiment of the connection position relationship among the transmission shaft, tensioning shaft and sprocket of the transmission device of the photovoltaic module laminator of the present utility model shown;

[0047] Figure 12 is Figure 11 a schematic A-A sectional view;

[0048] Figure 13 is a schematic structure view of an embodiment of the connection position relationship between the tensioning shaft and the sprocket of the present utility model;

[0049] Figure 14 is Figure 13 a schematic A-A sectional view;

[0050] Figure 15 is Figure 13 a schematic B-B sectional view;

[0051] Figure 16 is a schematic structure view of another embodiment of the connection position relationship between the tensioning shaft and the sprocket of the present utility model;

[0052] Figure 17 is a schematic view of an embodiment of the connection structure between the cross beam of the laminator and the circulating belt of the present utility model;

[0053] Figure 18 is Figure 17 a left view;

[0054] Figure 19Schematic diagram of another connection structure between the crossbeam and the circulating belt of the laminator of the present utility model;

[0055] Figure 20 is Figure 19 left view of;

[0056] Figure 21 Schematic diagram of another connection structure between the crossbeam and the circulating belt of the laminator of the present utility model;

[0057] Figure 22 is Figure 21 left view of;

[0058] Figure 23 Schematic diagram of another connection structure between the crossbeam and the circulating belt of the laminator of the present utility model;

[0059] Figure 24 is Figure 23 left view of;

[0060] Figure 25 Schematic diagram of another connection structure between the crossbeam and the circulating belt of the laminator of the present utility model;

[0061] Figure 26 is Figure 25 left view of.

[0062] Explanation of reference numerals:

[0063] 1. Shaft group; 2. Crossbeam; 3. Circulating belt; 31. Upper circulating belt; 32. Lower circulating belt; 4. Upper box; 5. Chain; 6. Heating plate; 7. Photovoltaic module; 8. Driving device; 9. Circulating belt tensioning device; 901. Tensioning shaft; 902. Tensioning component; 903. Shaft group support frame; 904. Guide device; 905. Bracket; 906. Tensioning shaft bearing;

[0064] 11. Stress relief hole; 110. Stress relief hole setting area; 12. Sprocket; 13. Driving core shaft; 14. Core shaft bearing; 15. Connecting piece; 16. Sleeve rod one; 17. Sleeve rod two; 18. Sleeve ring; 19. Flexible kit; 20. Opening; 21. Connecting seat; 22. Auxiliary sleeve rod; 23. Flexible connecting device; 24. U-shaped seat body; 25. Rectangular pipe; 26. Fixing piece. Detailed implementation manners

[0065] The structure of the present utility model will be further described and explained below in conjunction with specific embodiments.

[0066] For the convenience of description, the running direction of the circulating belt of the laminator is taken as the length direction, and the direction perpendicular to the running direction of the circulating belt is taken as the width direction of the laminator. The running direction of the circulating belt is called the length direction of the circulating belt, and the direction perpendicular to the running direction of the circulating belt, that is, the width direction of the circulating belt, is taken as the width direction of the circulating belt.

[0067] The crossbeam described in this patent application refers to a connecting device that fixedly supports the width direction of the circulating belt and connects the circulating belt with the chains on both sides of the laminator. It is a prior art and is usually called a tie rod assembly. Usually, the end of the circulating belt body is used as the part connected to the crossbeam, which is more economical. For example, a crossbeam is used to connect the ends of one circulating belt and another circulating belt, and the crossbeam acts as a connecting piece. It can also be used to connect the two ends of the same circulating belt to form a circular circulating belt, or two crossbeams are used to support and connect the two ends of a circulating belt respectively, so that both ends are supported in the width direction. It should be noted that the fixed connection position between the crossbeam and the circulating belt is arbitrary and does not necessarily need to be installed at the end of the circulating belt, and can be fixedly connected at any position. Figures 17 - 26 The crossbeam structure of an embodiment is shown, including a seat body with a U-shaped cross-section, a rectangular tube 25 is arranged along its length direction at the bottom of the U-shaped seat body 24, and a sleeve rod 16 is arranged between the rectangular tube and the U-shaped seat body. The sleeve rod 16 is fixed between the U-shaped seat body and the rectangular tube by a fixing member 26 to prevent it from disengaging from the two.

[0068] As Figures 1 - 16 shown, the circulating belt 3 for the transmission mechanism of the laminator in the embodiment of the present utility model includes a circulating belt body. As Figure 7a and 7b shown, there is at least one stress reduction hole setting area 110 (represented by a dotted line in the figure) on the circulating belt body. At least two stress reduction holes 11 are arranged in the stress reduction hole setting area. The stress reduction holes in each stress reduction hole setting area are distributed along the width direction of the circulating belt body. It can be one row or more than two rows. The positions of the stress reduction holes are not fixed and can be set at any position within the stress reduction hole setting area. The stress reduction holes are arranged at the part of the circulating belt body used for connecting with the crossbeam, or in the area beside the part connected with the crossbeam, or stress reduction holes are arranged both in the part connected with the crossbeam and in the area beside the part connected with the crossbeam. Usually, the stress reduction hole setting area is located in the area at both ends of the circulating belt. The stress reduction hole setting areas can be arranged in pairs, or can be arranged alone, or a combination of paired arrangement and single arrangement. One stress reduction hole setting area can be arranged on each circulating belt body, or two or more stress reduction hole setting areas can be arranged, depending on the overall length of the circulating belt. If the length of the circulating belt is long, the number of stress reduction hole setting areas arranged will increase. As Figure 7a and Figure 7bAs shown, when the stress-reducing hole setting areas are arranged in pairs, the part between the two stress-reducing hole setting areas is used to connect the cross beam, so that both sides of the cross beam have stress-reducing holes. When the stress-reducing hole setting area is set alone, stress-reducing holes are arranged on one side of the cross beam. When the bearing capacity of the circulating belt can meet the requirements, the more the number of stress-reducing holes, the better, and the less likely it is to wrinkle. The shape of the stress-reducing holes can be regular shapes such as circular, triangular, regular polygon, rectangular, oblong, rhombic or oval, or irregular shapes, as long as they are holes. Preferably, they are oblong holes, and the axis of the oblong holes is perpendicular to the end edge of the circulating belt body. The size of the stress-reducing holes is preferably the following dimensions: its length is less than or equal to 500 mm, such as 500 mm, 400 mm, 300 mm, 250 mm, 200 mm, 150 mm, 100 mm, 50 mm, 30 mm, 20 mm, 10 mm, 1 mm, etc.; the width is less than or equal to 100 mm, such as 100 mm, 80 mm, 60 mm, 50 mm, 40 mm, 20 mm, 10 mm, 5 mm, 1 mm; when circular holes are used, the hole diameter is less than or equal to 200 mm, such as 1 mm, 10 mm, 20 mm, 50 mm, 70 mm, 100 mm, 150 mm, 180 mm, 200 mm, etc.; the hole density is less than or equal to 100 per square meter, such as 1, 10, 20, 50, 60, 80, 100, etc. When two or more stress-reducing hole setting areas are arranged on the circulating belt, the arrangement directions of the stress-reducing holes at the corresponding positions in each stress-reducing hole setting area are parallel. For example, when stress-reducing holes are arranged at both ends of the circulating belt, the arrangement directions of the stress-reducing holes at both ends are parallel. For the circulating belt adopting the structure of the present utility model, since stress-reducing holes are arranged in the stress-reducing hole setting area, when the circulating belt is used on the equipment, the cross beam is arranged beside and adjacent to the stress-reducing hole setting area, and the stress-reducing holes are arranged along the length direction of the cross beam. When the cross beam tightens the circulating belt, the component force along the length direction of the cross beam received by the circulating belt is blocked by the stress-reducing holes, preventing the circulating belt from moving along the cross beam. Therefore, it plays a role in preventing the circulating belt from wrinkling. For example, when stress-reducing holes are arranged at one end or both ends of the circulating belt, since stress-reducing holes are arranged in the area near the edge of the belt at one end or both ends, that is, the area near the connection position with the cross beam, when the cross beam tightens the circulating belt, the component force along the length direction of the cross beam received by the circulating belt is blocked by the stress-reducing holes, preventing the circulating belt from moving along the cross beam. Therefore, it plays a role in preventing the circulating belt from wrinkling. The circulating belt of the present utility model can be in a ring shape or a strip shape when in use.

[0069] During installation, the distance between the center of the general stress-reducing hole and the connection part of the circulating belt and the crossbeam is less than or equal to 2500 mm. In this way, when the circulating belt body is fixedly supported and connected by the crossbeam, the distance between the center of the stress-reducing hole and the edge of the crossbeam is less than or equal to 2500 mm. The closer the stress-reducing hole is to the crossbeam, the better. Preferably, the distance from the edge of the crossbeam is less than or equal to 200 mm.

[0070] The present utility model further provides a laminator using the circulating belt structure of the present utility model. The laminator includes a circulating belt for transporting photovoltaic modules and / or a circulating belt for isolating lamination components. The following are three embodiments of the laminator structure.

[0071] As Figures 1 - 2 shown, the first embodiment of the photovoltaic module laminator is a traditional laminator, including a lower circulating belt 32 for transporting battery modules and an upper circulating belt 31 for isolating the photovoltaic module 7 and the lamination component (not shown in the figure) during lamination. The upper circulating belt is transported by an upper circulating belt driving device, and the lower circulating belt is transported by a lower circulating belt driving device. The structures of the upper circulating belt driving device and the lower circulating belt driving device are the same and are collectively referred to as the circulating belt driving device. The upper circulating belt 31 and the lower circulating belt 32 are collectively referred to as the circulating belt 3. The circulating belt driving device is a traditional structure, and the structures of the upper circulating belt driving device and the lower circulating belt driving device are the same. They both include a driving device 8, a chain transmission device, and a shaft group 1. The circulating belt 3 and the crossbeam 2. The shaft group 1 includes at least three parallel drive shafts. The chain transmission device includes sprockets and two parallel chains. A sprocket connected to the chain is provided at each end of each drive shaft. The two chains are respectively located at one end of the drive shaft and meshed with the sprockets on the drive shaft for driving connection. The driving device is connected to a drive shaft. While driving the drive shaft to rotate, it drives the sprockets to rotate, thereby driving the chain to circulate. The circulating belt is in a relaxed state. Generally, the end of the circulating belt is fixedly connected to the crossbeam 2. The crossbeam is arranged along the width direction of the circulating belt 3. The entire width direction of the end of the circulating belt is fixedly supported and flattened by the crossbeam, so as to flatten the entire circulating belt. The length direction of the crossbeam is perpendicular to the running direction of the circulating belt. The crossbeam spans between the two side chains and is fixedly connected to the corresponding side chains through its two ends. The circulating belt is loosely arranged around the shaft group 1. The crossbeam pulls the circulating belt forward. The circulating belt can be a closed loop or an open loop. For example, when using the same circulating belt to form a loop, a crossbeam is used to connect the head and tail ends of the same circulating belt through the cloth-covered shafts on both sides, or two crossbeams can be used to connect one end of the circulating belt respectively. In a transmission device, one circulating belt or multiple circulating belts can be used for connection. As Figure 1As shown, four crossbeams are used to connect four endless belts, and the four endless belts are connected end to end to form an endless belt body in a ring shape. When the two ends of each endless belt are respectively connected to a crossbeam, there is a certain distance between two adjacent endless belts, thus forming an unclosed endless belt. Stress-relieving hole setting areas are respectively arranged at both ends of the endless belt. The stress-relieving hole setting area includes the edge of the end of the endless belt. The crossbeam connects the edges of the ends of the two endless belts. The connection part between the crossbeam and the endless belt is located within the stress-relieving hole setting area or beside the stress-relieving hole setting area. The distance between the center of the stress-relieving hole and the connection part between the endless belt and the crossbeam is less than or equal to 2500 millimeters. The stress-relieving holes 11 are distributed along the length direction of the crossbeam. It is preferably an oblong hole, and the length direction of the oblong hole is perpendicular to the length direction of the crossbeam. The distance between the center of the stress-relieving hole and the nearest edge of the crossbeam is less than or equal to 2.5 meters, such as 1.5 meters, 1 meter, etc., and preferably less than or equal to 0.2 meters. For the laminator with the above structure, since stress-relieving holes are arranged in the area of 2.5 meters at the connection part between the endless belt and the crossbeam, wrinkles caused by the tension when the endless belt is pulled by the crossbeam can be reduced or eliminated. In this structure, the crossbeam serves as a traction device for pulling the endless belt to run.

[0072] As described in this background art, for the laminator with the structure of the first embodiment (usually called a traditional laminator), the endless belt is directly pulled by the crossbeam, and the endless belt is relatively loose. Since the laminating workbench of the multi-layer laminator is both the laminating workbench of the upper-layer laminating main machine and the upper cover of the lower-layer laminating main machine, the transmission directions of the lower circulation part 31 of the endless belt of the upper-layer laminating main machine and the upper circulation part 32 of the endless belt of the lower-layer laminating main machine are opposite. Therefore, when the endless belt of the upper-layer laminating main machine meets the endless belt of the lower-layer laminating main machine, it will rub against the battery module and the endless belt of the lower-layer laminating main machine, bonding the glue adhered to the endless belt of the upper-layer laminating main machine to the surface of the battery module. Also, because there is residual glue on the endless belt and a tensioning device cannot be set externally, when a tensioning device is set inside the endless belt, the technical problem of the endless belt running off track cannot be solved. Therefore, the endless belt transmission device of this structure is not applicable to multi-layer laminators and is only applicable to traditional single-layer laminators.

[0073] The transmission device with the structure of the second embodiment is applicable to multi-layer laminators. As Figure 3As shown in Figure 4, each layer laminating host includes a laminating workbench, a circulating belt and a circulating belt driving device. The circulating belt driving device includes a shaft group 1 and a driving device 8 connected to the driving transmission shaft in the shaft group 1. At least one transmission shaft and a tensioning shaft 901 are arranged in the shaft group 1. The shaft group supports and drives the circulating belt to run around the laminating workbench. The circulating belt 3 is in a closed ring shape and sleeved on the shaft group 1. The circulating belt is connected into a ring by connecting pieces. The circulating belt is tensioned under the action of the tensioning shaft. The end joint of the circulating belt is fixedly connected by a connecting piece. The driving device 8 drives the transmission shaft connected to it to drive the circulating belt to run. The position of the stress reduction hole setting area and the arrangement of the stress reduction holes are the same as those in Embodiment 1, located on one side or both sides of the connecting piece, that is, within the range of 2.5 meters on each of the front and back sides of the connecting piece. Of course, the closer to the connecting piece, the better. The stress reduction holes can also be covered by the connecting piece. The transmission shaft is rotatably arranged on the frame, and the tensioning shaft 901 is rotatably arranged on the bracket 905 and slidably connected to the shaft group support frame 903 through the bracket 905. The shaft group support frame is fixedly connected to the frame. The tensioning shaft realizes the tensioning function under the action of the tensioning device. The tensioning device includes a tensioning component and a guiding device 904. One end of the tensioning component is fixedly connected to the shaft group support frame, and the other end is connected to the bracket and thus fixedly connected to the tensioning shaft. The tensioning component is located outside the space area formed by the circulating belt. The guiding device 904 includes a slide rail or a chute arranged on the support frame. The bracket is slidably or rollably connected to the slide rail or the chute, so that the tensioning shaft is slidably connected to the support frame. Under the pulling force of the tensioning component, the tensioning shaft is tensioned outwards, thereby tensioning the circulating belt.

[0074] For the laminator adopting the structure of the second embodiment above, although the technical problem of the circulating belt being prone to wrinkles is solved by setting stress reduction holes on the circulating belt, there is still another problem, that is, since the circulating belt is tensioned and arranged on the shaft group 1 and is always tensioned by the tensioning shaft, due to the accumulation of the size and position errors of the circulating belt and the shaft group, the circulating belt is prone to deviation during transmission. To solve this problem, a transmission device with the structure of the third embodiment is specially developed, so as to obtain a multi-layer laminator in which the circulating belt is not prone to wrinkles and deviation.

[0075] As Figures 5 - 6 and Figures 11 to 16As shown in the figure, a laminator with the structure of the third embodiment is given. The laminator of the structure of this embodiment includes a circulating belt, a lamination workbench, a circulating belt tensioning device 9 and a circulating belt driving device. The circulating belt is transmitted by the circulating belt driving device to drive the circulating belt to run in a cycle. The circulating belt is tensioned by the circulating belt tensioning device to prevent it from sagging excessively, separating the tensioning and transmission of the circulating belt. The circulating belt driving device of the structure of this embodiment includes a chain driving device composed of a sprocket 12, a driving core shaft 901 and a chain 3, and a driving device 8. Chain driving devices are respectively arranged on the left and right sides of the lamination workbench of the laminator. The chains on both sides are arranged in parallel and have the same length. Sprockets 12 are respectively arranged on both sides of the front and rear ends of the laminator workbench. The chain is sleeved on the sprockets on the corresponding side. The sprockets on both sides at the front end or the rear end of the laminator workbench are connected by a driving core shaft 13, sharing the driving core shaft. The sprockets on both sides at the other end can be connected by a driving core shaft and rotatably connected to the frame through the driving core shaft, or can be rotatably connected to the frame through their respective sprocket shafts. The driving device 8 is connected to the driving core shaft 13, and drives the sprocket to rotate to drive the chain to run by driving the driving core shaft. The driving device generally adopts a combined structure of a motor and a speed reducer, which will not be described in detail as it is prior art. At least one cross beam is arranged between the two chains. The two ends of the cross beam are respectively connected to the chains. The length direction of the cross beam is fixedly connected to the width direction of the circulating belt. It can be continuously fixedly connected to the cross beam in the entire width direction of the circulating belt, or can be intermittently fixedly connected to the cross beam in the entire width direction of the circulating belt. The circulating belt tensioning device 9 includes a tensioning member 902, a guiding device 904 and two parallel tensioning shafts 901. The two tensioning shafts are respectively arranged at the front and rear ends of the lamination workbench. One tensioning shaft is sleeved outside the driving core shaft and rotatably connected to the driving core shaft. This tensioning shaft is called a fixed moving tensioning shaft. The other tensioning shaft is rotatably arranged at both ends on a bracket 905 and is called a movable tensioning shaft. The shaft group support frame 903 is fixedly connected to the body of the laminator. One end of the tensioning member is fixedly connected to the shaft group support frame, and the other end is fixedly connected to the movable tensioning shaft through the bracket 905. The movable tensioning shaft is rotatably arranged on the bracket 905. The tensioning member is located on the side of the movable tensioning shaft opposite to the position of the fixed moving tensioning shaft. In this way, the movable tensioning shaft is pulled by the tensioning member to provide a pulling force away from the fixed moving tensioning shaft for the movable tensioning shaft, thereby providing a tensioning force for the circulating belt. There are at least two tensioning members, which are respectively located near both ends of the movable tensioning shaft, facilitating the parallel movement of the movable tensioning shaft. The guiding device 904 includes a slide rail or a slide groove arranged on the shaft group support member. A slider or a pulley corresponding to the slide rail or the slide groove can be arranged on the bracket. The length direction of the slide rail or the slide groove is consistent with the running direction of the circulating belt. It should be particularly noted that in the present invention, the sprocket and the movable tensioning shaft are separately arranged. The sprocket shaft and the movable tensioning shaft are not the same shaft, and their axes do not have to be collinear.For the laminator adopting the above structure, the tensioning and transmission of the endless belt are separated. The endless belt is sleeved outside the tensioning shaft and tensioned by the tensioning shaft. The driving device drives the sprocket to drive the chain to run, thereby driving the endless belt to run. The friction between the endless belt and the tensioning shaft is sliding friction. The tensioning shaft only plays the role of supporting and tensioning the endless belt and guiding the endless belt, without playing a transmission role. Since the two chains on both sides are driven by the same transmission core shaft and the two chains run synchronously, the deviation of the endless belt can be effectively corrected. In this structure, the cross beam pulls the endless belt to form a traction device for the endless belt. In the structure of the present utility model, since the endless belt is tensioned by the tensioning shaft and the cross beam is driven by the chain, in order to ensure that the cross beam can pass through the shaft group smoothly, a connecting member 15 is provided between the cross beam and the endless belt, and the cross beam is fixedly connected to the endless belt through the connecting member 15. The cross beam and the connecting member jointly act to pull the endless belt to run, forming a traction device for the endless belt. The connecting member can be flexible or rigid. The flexible connecting member can adopt the following structure, such as. Figure 17 and 18 As shown, materials such as polytetrafluoroethylene fiberglass, which are the same as those of the endless belt, are used. The amplitude, that is, the width, is the same as or less than the width of the endless belt. One end is wound around to form a sleeve ring 18, which is sleeved and connected to the sleeve rod 16 of the cross beam. The other end is bonded or sewn to the endless belt 3 to form an integral body. In this way, the entire width of the endless belt is fixedly connected through the connecting member 15 and the cross beam 2. An opening 20 can also be provided at one end of the set sleeve to make the sleeve ring discontinuous; Another structural form is as Figure 19 and Figure 20 As shown, each connecting member 1 is a strip with a sleeve ring 18 at one end. The lengths of the strips are equal. They are sleeved and connected to the sleeve rod 16 through the sleeve rings, and the other end is fixedly connected to the endless belt through bonding, sewing or riveting, and the strips are arranged in a row at intervals and sleeved on the sleeve rod at the same time and fixedly connected to the endless belt at intervals. Figures 21 - 22 As shown, the connecting member can also be a rigid sheet body, such as a metal sheet or a rigid fiber sheet. Sleeve rings 18 are provided at both ends of the rigid sheet body. The lengths of the rigid sheet bodies are equal. One end is fixedly connected to the sleeve rod 1 in a sleeved manner, and the other end is sleeved and connected to the auxiliary sleeve rod 22. A plurality of flexible kits 19 are arranged at intervals on the endless belt. The plurality of flexible kits are arranged in a row. One end of the flexible kit is fixedly connected to the endless belt through bonding, sewing or riveting. The other end of the flexible kit has a ring sleeve, and one end of the flexible kit is sleeved on the auxiliary sleeve rod 22 at intervals through the ring sleeve and the rigid member. Figures 23 - 24 As shown, the connecting member can also be a rigid shaft or rod. Through holes are respectively provided at both ends of the rigid shaft or rod. One end of the rigid shaft or rod is sleeved and connected to the sleeve rod 1 through the through hole, and the other end is sleeved and connected to the auxiliary sleeve rod 22 through the through hole. The rigid shafts or rods are arranged in parallel. The auxiliary sleeve rod is sleeved and connected to the flexible kit provided on the endless belt, and the flexible kit and the rigid connection are arranged at intervals. Figures 25 - 26As shown, the connecting member can also be a chain. Multiple chains are arranged in a row and set in parallel. One end of the chain is sleeved and connected to the first sleeve rod, and the other end is sleeved and connected to the second auxiliary sleeve rod. The second sleeve rod is sleeved and connected to the flexible kit arranged on the endless belt. The flexible kit and the chain are arranged at intervals. In the present utility model, the auxiliary sleeve rod and the flexible kit form a transition connecting device. The purpose of setting the transition connecting device is to make the connection between the rigid connecting member and the endless belt have good flexibility, facilitating the cross beam to pass through the shaft group smoothly. Two sets of connecting members can be set. The cross beam adopts a structure with sleeve rods arranged on both sides, that is, the first sleeve rod and the second sleeve rod are respectively arranged on both sides of the cross beam. The first sleeve rod and the second sleeve rod are arranged in parallel. One end of the connecting member of the first set is respectively sleeved and connected to the first sleeve rod, and the other end is directly or indirectly fixedly connected to the endless belt. One end of the connecting member of the second set is sleeved and connected to the second sleeve rod, and the other end is directly or indirectly fixedly connected to the endless belt. When indirectly fixedly connected, it is connected through the transition connecting device. For the convenience of narration, the connecting member and the transition connecting device are collectively referred to as the flexible connecting device. Preferably, the connecting members and the transition connecting devices on both sides of the cross beam are the same, forming a structure symmetrical about the cross beam. Using the above connecting member to connect the cross beam and the endless belt makes there be a certain distance between the cross beam and the endless belt, and makes there be a certain interval between the cross beam and each shaft when passing through the shafts in the shaft group, preventing interference between the two. Such as Figure 6As shown, to make the crossbeam higher than the top surface of the shaft group when passing through the shaft group, a sprocket pitch diameter larger than that of the fixed tensioner or the transmission mandrel can be adopted. Preferably, the pitch radius of the sprocket supporting the chain is equal to the radius of the transmission shaft or the tensioning shaft on the same side. The two ends of the crossbeam are connected to the chain links through the connecting seats 21, and the distance between the crossbeam and the sprocket is compensated by the connecting seats. With the above-mentioned circulating belt structure and the structure of the conveying device, stress-reducing holes are arranged along the length direction of the crossbeam at the connecting part between the circulating belt and the crossbeam and on one side or both sides thereof. Since the stress caused by the tensioning of the tensioning shaft is absorbed by the stress-reducing holes, wrinkles are not likely to occur on the circulating belt. Of course, the number and density of the stress-reducing holes should be determined according to the specific model and specific situation, with the ultimate goal of not generating wrinkles. When stress-reducing holes are arranged only on one side of the crossbeam and a wrinkle-free state is desired, there are at least two crossbeams, and the stress-reducing holes are arranged at both ends outside the area of the crossbeam group that bears the battery module. In this way, the circulating belt of the battery module located between the two crossbeams can avoid generating wrinkles. In the present invention, the connecting piece is an intermediate medium for connecting the crossbeam and the circulating belt. Setting the connecting piece can enable the crossbeam to pass through the tensioning shaft smoothly and correct the deviation of the circulating belt. In the laminator of this technical solution, stress-reducing holes are arranged on the circulating belt for conveying the battery module. The arrangement direction of the centers of the stress-reducing holes is parallel to the length direction of the crossbeam. The distance between the centers of the stress-reducing holes and the crossbeam is less than or equal to 1.5 meters, and the stress-reducing holes are located at the connecting part between the circulating belt and the crossbeam, or on one side or both sides of the connecting part, or stress-reducing holes are arranged at the connecting part between the circulating belt and the crossbeam and on both sides. The width direction of the circulating belt is perpendicular to the running direction of the circulating belt. With the above structure, not only can wrinkles on the circulating belt be prevented, but also the deviation of the circulating belt can be prevented.

[0076] In the present invention, the tensioning member can adopt a spring, or a cylinder or a bolt-nut moving pair can be adopted. When a spring is adopted, one end of the spring is fixedly connected to the shaft group support frame, and the other end is fixedly connected to the support. When a bolt-nut moving pair is adopted, the nut is fixedly arranged on the support, and the bolt is threadedly connected to the shaft group support frame. When a cylinder is adopted, the cylinder body or the cylinder rod is fixedly connected to the shaft group support frame, and the cylinder rod and the cylinder body are fixedly connected to the support. The laminator with the structure of this embodiment can be single-layer or multi-layer.

[0077] The principle that the circulating belt of the structure of the present invention can prevent wrinkles will be described below in combination with mechanical analysis: As Figure 9 shown, during operation, the circulating belt is subjected to the pulling force of the crossbeam. In an ideal state, the direction of the pulling force is perpendicular to the crossbeam, that is, consistent with the forward direction of the circulating belt. The circulating belt does not deflect, the direction of the pulling force is consistent with the running direction of the circulating belt, and the transmission cloth is supported by the crossbeams on both sides and will not generate wrinkles.

[0078] In the actual state, see Figure 10:When the endless belt runs, under the influence of various factors such as the dimensional error of the fabric itself, the difference in coating density, the warp and weft error, the geometric error of the crossbeam, and the geometric error of the transmission mechanism, etc., it deflects in a certain direction; the deflected endless belt is subjected to two component forces in the Fx direction and the Fy direction, where Fx is the force in the movement direction of the endless belt, and Fy is the force perpendicular to the movement direction of the endless belt. The Fy component force accumulates and increases along the width direction of the endless belt. When the endless belt moves forward, the Fy component force acts on the endless belt. When the Fy component force is greater than the anti-crease strength of the endless belt itself, creases will occur in the weak parts of the endless belt. For the endless belt adopting the structure of the present utility model, when stress-reducing holes are arranged along the width direction of the endless belt, the stress-reducing holes are equivalent to dividing the endless belt into several narrow strips in the width direction. When the force in the Fy direction has not accumulated to the anti-crease strength limit of the fabric itself, the Fy is unloaded at the position of the stress-reducing holes, so that the endless belt no longer produces creases.

Claims

1. A novel anti-wrinkle circulating belt for a laminating machine, comprising a circulating belt body, characterized in that: At least one stress relief hole setting area is arranged on the circulating belt body, and the stress relief hole setting area extends along the width direction of the circulating belt body. There are multiple stress relief holes distributed in the stress relief hole setting area along the width direction of the circulating belt body.

2. The novel wrinkle-proof circulating belt according to claim 1, characterized in that: The stress relief hole setting areas are arranged in groups, or arranged in pairs of two, or arranged individually, or arranged in pairs of two and in combination with individual arrangement, or the width of the stress relief hole setting area is less than or equal to 500 mm and greater than 0 mm.

3. The novel wrinkle-proof circulating belt according to claim 1, characterized in that: The stress-reducing hole is in the shape of a circle, a triangle, a regular polygon, a rectangle, an oblong, a rhombus or an ellipse; or a combination of any two or more of the shapes of the holes.

4. The novel wrinkle-proof circulating belt according to claim 2, characterized in that: The hole spacing of the stress relief holes is not greater than 500 mm; and / or the size of the stress relief holes is not greater than 300 mm in length, not greater than 100 mm in width, or not greater than 200 mm in diameter; and / or the hole density is not greater than 100 holes per square meter.

5. The novel wrinkle-proof circulating belt according to claim 2, characterized in that: When the stress-relief holes are in the shape of an oblong, an ellipse or a diamond, the length direction of the holes is perpendicular to the arrangement direction of the holes.

6. The novel wrinkle-proof circulating belt according to claim 1, characterized in that: The stress relief hole setting area is located at one end or both ends of the circulating belt body. When stress relief holes are set at both ends of the circulating belt, the arrangement directions of the stress relief holes located at both ends of the circulating belt are parallel.

7. The novel wrinkle-proof circulating belt according to claim 1, characterized in that: The circulating belt is made of flexible material and is used for carrying and transmitting battery components.

8. A photovoltaic module laminating machine, comprising a laminating main machine, wherein the laminating main machine comprises a circulating belt and a circulating belt transmission device, wherein the circulating belt is driven by the circulating belt transmission device to run, and wherein: The circulating belt is fixedly connected to the traction device in the width direction and is pulled forward by the traction device. The traction device is connected to and driven by the circulating belt transmission device. The circulating belt adopts the new anti-wrinkle circulating belt described in one of claims 1-7. The stress relief hole setting area is located on one side or both sides of the connection between the traction device and the circulating belt, or is located at the connection.

9. A photovoltaic module laminating machine as claimed in claim 8, characterized in that: It includes an upper box and a lower box, and the circulating belt includes an upper circulating belt running around the upper box and a lower circulating belt running around a laminating workbench. The upper circulating belt is used to isolate battery components and laminating components during lamination, and the lower circulating belt is used to transmit battery components and support battery components during lamination. One circulating belt is correspondingly provided with a circulating belt transmission device, and the circulating belt transmission device includes a sprocket, a chain, a driving device and an axis group. One axis in the axis group serves as a driving axis, and the driving device is connected to the driving axis in the axis group. The sprockets are respectively arranged at both ends of the axis, and the chain is sleeved on the sprocket. The traction device is a crossbeam, and the two ends of the crossbeam are respectively fixedly connected to the chains on the corresponding sides. The circulating belt is fixedly connected to the crossbeam in the entire width direction, and the driving device drives the driving axis to rotate, thereby driving the chain and the circulating belt to circulate. The axis group of the lower circulating belt supports the lower circulating belt to run around the laminating workbench, and the axis group of the upper circulating belt supports the upper circulating belt to run around the upper box.

10. A photovoltaic module laminating machine as claimed in claim 8, characterized in that: The endless belt transmission device includes a sprocket, a transmission core shaft, a driving device and two parallel chains. The endless belt runs around the laminating workbench under the support of the shaft group. Sprockets are rotatably arranged on both sides of the two ends of the laminating workbench. The chains are sleeved on the sprockets on the corresponding sides. The chains on both sides run in parallel and synchronously. The traction device is a crossbeam. The two ends of the crossbeam are respectively fixedly connected to the chains on the corresponding sides. The sprocket at at least one end is coaxially connected through the transmission core shaft. The driving device is fixedly connected to the transmission core shaft. The driving device drives the chain to run by driving the transmission core shaft, thereby driving the crossbeam to pull the endless belt to run. It also includes a circulating Belt tensioning device, the circulating belt tensioning device includes the shaft group, the shaft group includes a fixed tensioning shaft, a movable tensioning shaft, a tensioning component and a guide device, the fixed tensioning shaft is sleeved outside the transmission core shaft and is rotatably connected to the transmission core shaft, the movable tensioning shaft is rotatably connected to the bracket, the bracket is slidably arranged on the shaft group support frame or on the machine body, one end of the tensioning component is fixedly connected to the bracket, and the other end is fixedly connected to the shaft group support frame or the machine body, the guide device is a slide groove or a slide rail arranged on the shaft group support frame, the bracket is slidably or rollingly connected to the slide groove or the slide rail, and the tensioning component provides tensioning force for the tensioning shaft.

11. A photovoltaic module laminating machine as claimed in claim 10, characterized in that: The tensioning device includes a tensioning component and a guiding device. The tensioning shaft is rotatably arranged on the bracket, and the bracket is slidably arranged on the shaft group support frame. The guiding device includes a slide groove or a slide rail. The bracket is slidably or rollingly connected to the slide groove or the slide rail to achieve a sliding connection between the bracket and the shaft group support frame. One end of the tensioning component is fixedly connected to the bracket, and the other end is fixedly connected to the shaft group support frame.

12. The photovoltaic module laminator according to claim 11, characterized in that: The tensioning component is a cylinder or a spring.

13. A photovoltaic module laminating machine as claimed in claim 10, characterized in that: A flexible connection device is provided between the crossbeam and the circulating belt, and the two are fixedly connected through the flexible connection device.

14. A photovoltaic module laminating machine as claimed in claim 13, characterized in that: The flexible connecting device is a flexible connecting piece, one end of which is provided with a ring, which is connected to the sleeve rod of the crossbeam through a sleeve ring, and the other end is directly fixedly connected to the circulating belt, or the flexible connecting device includes multiple rigid connecting pieces and a transition connecting device, and the transition connecting device includes an auxiliary sleeve rod and a flexible sleeve, one end of the flexible sleeve is sleeve-connected to the auxiliary sleeve rod, and the other end is fixedly connected to the circulating belt, the flexible sleeve and the rigid connecting piece are alternately arranged on the auxiliary sleeve rod, and both sections of the rigid connecting piece are provided with through holes or rings, one end of which is sleeve-connected to the sleeve rod through the through hole or ring, and the other end is sleeve-connected to the auxiliary sleeve rod through the through hole or ring.

15. A photovoltaic module laminator according to claim 13 or 14, characterized in that: The two sides of the cross beam are fixedly connected with the chains on the corresponding sides through the connecting seats to support the cross beam so that it is higher than the top surface of the axle group when passing through the axle group.

16. A photovoltaic module laminating machine as claimed in claim 13, characterized in that: Flexible connection devices are respectively arranged on both sides of the crossbeam and fixedly connected to the circulating belt. The total lengths of the flexible connection devices on both sides are equal so that the projections of the flexible connection devices and the circulating belt between the flexible connection devices on both sides form an isosceles triangle, or the total lengths of the flexible connection devices on both sides are unequal so that the projections of the flexible connection devices and the circulating belt between the flexible connection devices on both sides form a non-isosceles triangle.

17. The photovoltaic module laminator according to claim 8, characterized in that: The shortest distance between the center of the stress-reducing hole and the side edge of the connecting portion is less than or equal to 1.5 meters or less than or equal to 0.1 meters and greater than 0 meters.

18. The photovoltaic module laminator according to claim 8, characterized in that: The traction device is arranged between every two adjacent pairs of stress relief hole setting areas, and / or the traction is arranged next to each individually set stress relief hole setting area, and / or the stress relief hole setting area is located at the end of the circulating belt, and the traction device is connected to the end of the circulating belt.

19. The photovoltaic module laminator according to claim 10, characterized in that: The laminating machine is a multi-layer laminating machine, each layer of the laminating main machine includes a laminating workbench, and the laminating workbench of each layer of the laminating main machine is arranged up and down.

20. A photovoltaic module laminating machine, comprising an endless belt and an endless belt transmission device, wherein the endless belt is used to transport the battery module and to isolate the battery module from the laminating components during lamination, and to support the battery module, characterized in that: The circulating belt adopts the new type of anti-wrinkle circulating belt described in any one of claims 1-7, the stress relief hole setting area is located on one side or both sides of the connection part between the traction device and the circulating belt, or is located at the connection part, the circulating belt transmission device includes a driving device and an axis group, the axis group includes a transmission shaft and a tensioning shaft, the axis group supports the circulating belt to run around the laminating workbench, the tensioning shaft tensions the circulating belt under the action of the tensioning device so that the circulating belt tensioning sleeve is arranged on the axis group, the driving device is connected to a transmission shaft, and the driving device drives the transmission shaft to rotate, thereby driving the circulating belt to run, the stress relief holes are arranged on one side or both sides of the connection part at the joint of the circulating belt, or at the joint of the circulating belt.

21. The photovoltaic module laminator according to claim 20, characterized in that: The laminator is a multi-layer laminator, each of which includes a laminating workbench and the circulating belt and the circulating belt transmission device. The laminating workbench of each laminating host is arranged up and down, and the laminating workbench of each laminating host also serves as the upper cover of the laminating host located at the lower layer.

Images