Laminating unit and laminating machine

Abstract

The utility model provides a laminating unit and a laminating machine. The laminating unit comprises a hard pressing plate, a flexible pressing plate, a driving shaft, a driven shaft and high-temperature cloth. An air cavity connected with a negative pressure device is formed in the hard pressing plate, and an adsorption groove communicated with the air cavity is formed in the lower surface of the hard pressing plate. And the negative pressure device exhausts air in the air cavity, so that the flexible pressing plate is adsorbed on the lower surface of the hard pressing plate through the adsorption groove. The driving shaft and the driven shaft are arranged at the two ends of the hard pressing plate, and the high-temperature cloth is wound around the driving shaft and the driven shaft. Blocking-up pieces are arranged on the edges of the two sides of the high-temperature cloth, and vacuumizing holes are formed in the non-high-temperature cloth covering area of the upper surface of the hard pressing plate. When every two adjacent laminating units are covered, the heightening piece of the laminating unit located on the upper portion is supported on the laminating unit located on the lower portion, so that heightening of the flexible pressing plate of the laminating unit located on the upper portion is achieved, when the laminating cavity is vacuumized, the flexible pressing plate does not fall off from the bottom of the hard pressing plate, and when the laminating cavity is inflated subsequently, the flexible pressing plate does not fall off from the bottom of the hard pressing plate. And the flexible pressing plate can be smoothly adsorbed by the hard pressing plate again.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic cell production equipment, and specifically to a laminating unit and a laminating machine. Background Art

[0002] The traditional photovoltaic module production process involves conveying the modules, along with a high-temperature cloth, into the lower chamber of a laminator. At a certain temperature, the film within the modules melts. During this process, the lamination chamber is evacuated, removing air bubbles trapped within the modules. Subsequently, air is inflated into the air cavity above the silicone sheet, causing the sheet to deform downward, squeezing the modules and fulfilling the physical and chemical processes required during the module lamination process.

[0003] While the soft pressing process using silicone sheets can meet the current lamination requirements for photovoltaic modules, as photovoltaic power generation efficiency continues to improve, the requirements for pressure uniformity, post-pressing flatness, and the probability of corner breakage in the lamination process have also increased. To address this, a flat plate hard pressing process has been proposed, which uses steel plates instead of silicone sheets to perform hard pressing on the modules. To improve pressure uniformity during the hard pressing process and reduce the probability of corner breakage, a flexible pressing plate with a certain degree of softness is placed under the hard pressing plate. The flexible pressing plate is attached to the bottom of the hard pressing plate using vacuum suction.

[0004] Because the flexible platen is attached to the bottom of the hard platen using vacuum suction, the pressure difference between the bottom of the flexible platen and the suction holes on the bottom of the hard platen that hold it in place decreases during the vacuuming of the lamination chamber, causing the flexible platen to fall from the bottom of the hard platen. Subsequently, when the lamination chamber is inflated, the flexible platen cannot be reattached, forcing it to be repeatedly attached to the bottom of the hard platen by manual placement of the tooling, resulting in reduced photovoltaic module production efficiency. Utility Model Content

[0005] In order to solve the above technical problems, the present application provides a lamination unit, which adopts the following technical solutions:

[0006] A lamination unit includes a hard pressing plate, a flexible pressing plate, a driving shaft, a driven shaft and a high-temperature cloth, wherein:

[0007] An air cavity is provided in the hard pressing plate, which is connected to the negative pressure device, and a plurality of adsorption grooves connected to the air cavity are provided on the lower surface of the hard pressing plate;

[0008] The negative pressure device is used to evacuate the air cavity so that the adsorption groove generates adsorption force, and the flexible pressing plate is adsorbed on the lower surface of the hard pressing plate through the adsorption groove;

[0009] The driving shaft is arranged at the first end of the hard pressing plate, the driven shaft is arranged at the second end of the hard pressing plate, and the high-temperature cloth is wound around the driving shaft and the driven shaft and covers the hard pressing plate and the flexible pressing plate;

[0010] The edges of both sides of the high-temperature cloth are provided with pads protruding from the surface of the high-temperature cloth;

[0011] The non-high-temperature cloth-covered area on the upper surface of the hard pressing plate is provided with vacuum holes.

[0012] The lamination unit provided by the present application has raised members protruding from the surface of the high-temperature cloth at both side edges of the high-temperature cloth. Thus, when two adjacent lamination units are covered, the raised members of the upper lamination unit are supported on the lower lamination unit, thereby raising the flexible pressure plate of the upper lamination unit. When the lamination chamber is evacuated, the flexible pressure plate remains in contact with the hard pressure plate. Thus, when the lamination chamber is subsequently inflated, the flexible pressure plate can be smoothly re-absorbed by the hard pressure plate, eliminating the need to manually place a tool to re-absorb the flexible pressure plate to the bottom of the hard pressure plate, thereby improving the production efficiency of photovoltaic modules.

[0013] In some embodiments, the spacer is a continuous spacer strip extending along the edge of the high-temperature cloth.

[0014] Using a whole raising strip as the raising piece facilitates the preparation and molding of the raising piece and facilitates the installation of the raising piece to the edge of the high-temperature cloth.

[0015] In some embodiments, the raising member includes a plurality of raising blocks arranged at intervals along the edge of the high-temperature cloth.

[0016] The raising component is composed of a plurality of raising blocks arranged at intervals along the edge of the high-temperature cloth. When the raising blocks are deformed under pressure, only the deformed raising blocks need to be replaced, thereby reducing maintenance costs and improving maintenance efficiency.

[0017] In some embodiments, the spacers are glued or sewn to the edges of the high-temperature cloth.

[0018] Two easy-to-operate methods for installing the raising parts are provided, both of which can achieve convenient installation and maintenance of the raising parts.

[0019] In some embodiments, the hard pressing plate is provided with a plurality of adsorption holes connected to the air cavity. The adsorption holes have adsorption ports located on the lower surface of the hard pressing plate, and each adsorption groove is connected to at least one adsorption port.

[0020] By arranging adsorption holes connecting the air cavity and the adsorption groove on the hard pressing plate, the adsorption groove is evacuated, ensuring that the hard pressing plate can adsorb and fix the flexible pressing plate.

[0021] In some embodiments, a sealing ring is provided at the peripheral edge of the lower surface of the hard pressing plate, and the sealing ring surrounds the peripheral side of the flexible pressing plate.

[0022] When two adjacent lamination units are covered to form a lamination cavity, the sealing ring improves the airtightness of the lamination cavity.

[0023] In some embodiments, a heating element is provided on the hard pressing plate, and the heating element is at least used to heat the hard pressing plate. The heating element is an electromagnetic heating element, a resistance heating element or an oil heating element.

[0024] The rigid press plate has heating properties. When two adjacent laminating units are closed to laminate the photovoltaic module located between them, the lower laminating unit heats the photovoltaic module, melting the EVA inside the module. Ultimately, under continued lamination, the melted EVA bonds and solidifies the cell, cover glass, and backsheet together.

[0025] In some embodiments, the laminating unit further includes a driving member configured to drive the driving shaft to rotate, thereby driving the high-temperature cloth to rotate.

[0026] The driving component drives the high-temperature cloth to be transported, realizing the automatic transportation of photovoltaic modules.

[0027] The present application also provides a laminating machine, which includes n laminating units as described above that are arranged in layers in a vertical direction; when two adjacent laminating units are covered, a laminating cavity is formed, wherein the padding member of the laminating unit located below supports the flexible pressure plate of the laminating unit located above.

[0028] The laminating machine provided in the present application is composed of n laminating units arranged in layers in a vertical direction. When the n laminating units are closed synchronously, two adjacent laminating units can laminate the photovoltaic modules therebetween, thereby improving the lamination efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure after two adjacent laminated units are covered;

[0030] Figure 2 It is a schematic diagram of the cross-sectional structure of two adjacent laminated units after being covered;

[0031] Figure 3 for Figure 2 A local enlarged view of area A;

[0032] Figure 4 Schematic diagram of the structure of a high-temperature cloth in one embodiment at one viewing angle;

[0033] Figure 5 is a schematic structural diagram of a high-temperature cloth in one embodiment from another perspective;

[0034] Figure 6 is a schematic structural diagram of a high-temperature cloth in another embodiment at one viewing angle;

[0035] Figure 7Schematic diagram of the structure of the high-temperature cloth in another embodiment from another perspective.

[0036] Figures 1 to 7 Included are:

[0037] Lamination unit 10: hard pressing plate 1, flexible pressing plate 2, air cavity 3, spacer 4, spacer block 41, spacer strip 42, adsorption hole 5, sealing ring 6, driving shaft 7, driven shaft 8, high-temperature cloth 9, driving part 11;

[0038] Lamination cavity 20. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0040] like Figures 1 to 3 As shown, the lamination unit 10 in the embodiment of the present application includes a hard pressing plate 1, a flexible pressing plate 2, a driving shaft 7, a driven shaft 8 and a high-temperature cloth 9, wherein:

[0041] An air cavity 3 is provided in the hard pressing plate 1 , and the air cavity 3 is connected to the negative pressure device. A plurality of adsorption grooves communicating with the air cavity 3 are provided on the lower surface of the hard pressing plate 1 .

[0042] The negative pressure device is used to evacuate the air cavity 3 so that the adsorption groove generates adsorption force, and the flexible pressing plate 2 is adsorbed on the lower surface of the hard pressing plate 1 through the adsorption groove.

[0043] In one implementation, the hard pressing plate may be a steel plate, and the flexible pressing plate may be a silicone plate. The negative pressure device may be a vacuum pump.

[0044] The driving shaft 7 is arranged at the first end of the hard pressing plate 1 , the driven shaft 8 is arranged at the second end of the hard pressing plate 1 , and the high temperature cloth 9 is wound around the driving shaft 7 and the driven shaft 8 and covers the hard pressing plate 1 and the flexible pressing plate 2 .

[0045] At both side edges of the high temperature cloth 9 , there are provided spacers 4 protruding from the surface of the high temperature cloth 9 .

[0046] The high-temperature cloth is provided with spacers protruding from the high-temperature cloth on both sides of the edge, which can also effectively limit the components and prevent the components from falling off the high-temperature cloth.

[0047] The upper surface of the hard pressing plate 1 not covered by the high temperature cloth is provided with vacuum holes.

[0048] Because the high-temperature cloth 9 is provided with a padding piece 4 protruding from the surface of the high-temperature cloth 9 at both side edges. In this way, when two adjacent lamination units 10 are covered, the padding piece 4 of the lamination unit 10 located above is supported on the lamination unit 10 located below, thereby achieving the padding of the flexible pressure plate 2 of the lamination unit 10 located above. In this way, when the lamination chamber 20 is vacuumed, the flexible pressure plate 2 will not fall from the bottom of the hard pressure plate 1, but will remain in contact with the hard pressure plate 1. In this way, when the lamination chamber 20 is subsequently inflated, the flexible pressure plate 2 can be smoothly adsorbed by the hard pressure plate 1 again, and there is no need to manually place the tooling to make the flexible pressure plate 2 be adsorbed on the bottom of the hard pressure plate 1 again, thereby improving the production efficiency of photovoltaic modules.

[0049] In addition, by providing vacuum holes on the upper surface of the hard pressing plate 1 , the lamination cavity 20 can be vacuumed through the vacuum holes, so that bubbles in the photovoltaic components in the lamination cavity 20 are extracted.

[0050] like Figures 4 and 5 As shown, in an optional embodiment, the raising member 4 includes a plurality of raising blocks 41 spaced apart along the edge of the high-temperature cloth 9. The raising member 4 is composed of a plurality of raising blocks 41 spaced apart along the edge of the high-temperature cloth. If one or more of the raising blocks 41 are deformed under pressure, only the deformed raising blocks 41 can be replaced, thereby reducing maintenance costs and improving maintenance efficiency. Optionally, the raising blocks 41 are attached to the edge of the high-temperature cloth by gluing or sewing.

[0051] like Figures 6 and 7 As shown, in another optional embodiment, the raising member 4 is a continuous raising strip 42 extending along the edge of the high-temperature cloth 9. Using a whole raising strip 42 as the raising member facilitates the preparation and molding of the raising member and facilitates the installation of the raising member to the edge of the high-temperature cloth 9. Optionally, the raising strip 42 is installed to the edge of the high-temperature cloth by gluing or sewing.

[0052] like Figure 3 As shown, the hard pressing plate 1 is optionally provided with a plurality of adsorption holes 5 communicating with the air cavity 3. The adsorption holes 5 have adsorption ports located on the lower surface of the hard pressing plate 1, and each adsorption slot is connected to at least one adsorption port. By providing the adsorption holes 5 on the hard pressing plate 1 communicating with the air cavity 3 and the adsorption slots, air can be evacuated from the adsorption slots, ensuring that the hard pressing plate 1 can adsorb and secure the flexible pressing plate 2.

[0053] like Figure 3 As shown, optionally, a sealing ring 6 is provided at the peripheral edge of the lower surface of the hard pressing plate 1, and the sealing ring 6 surrounds the peripheral side of the flexible pressing plate 2. When two adjacent laminating units 10 are overlapped to form a laminating cavity 20, the sealing ring 6 seals the laminating cavity 20 from the peripheral side, thereby improving the airtightness of the laminating cavity 20.

[0054] Optionally, a heating element is provided on the hard pressing plate 1 , and the heating element is at least used to heat the hard pressing plate 1 , and the heating element is an electromagnetic heating element, a resistance heating element or an oil heating element.

[0055] In one implementation, the resistance heating element includes an electric heating rod, which directly heats the hard pressing plate; the electromagnetic heating element includes an electromagnetic coil and a thermally conductive rod, the electromagnetic coil heats the thermally conductive rod, and the thermally conductive rod transfers heat to the hard pressing plate; the oil heating element includes thermally conductive oil, and the hard pressing plate is provided with holes for the thermally conductive oil to flow through, and the heating oil flows in the hard pressing plate to achieve heating of the hard pressing plate.

[0056] As two adjacent laminating units 10 are closed to laminate the photovoltaic module located between them, the lower laminating unit 10 heats the photovoltaic module, melting the EVA inside the module. Ultimately, under continued lamination, the melted EVA bonds and solidifies the solar cells, cover glass, and backsheet together.

[0057] like Figure 1 As shown, optionally, the laminating unit 10 in the embodiment of the present application further includes a driving member 11, which is used to drive the active shaft 7 to rotate, thereby driving the high-temperature cloth 9 to rotate, so that the high-temperature cloth 9 can realize automatic transportation of the photovoltaic components.

[0058] The embodiment of the present application further provides a laminating machine, which includes n laminating units 10 provided in any of the above embodiments arranged in layers in a vertical direction. When two adjacent laminating units 10 are covered, a laminating cavity is formed, wherein the spacer 4 of the laminating unit 10 located at the bottom supports the flexible pressing plate 2 of the laminating unit 10 located at the top. The laminating machine provided in the embodiment of the present application is composed of n laminating units 10 arranged in layers in a vertical direction. When the n laminating units 10 are covered synchronously, two adjacent laminating units 10 can laminate the photovoltaic modules therebetween, thereby improving the lamination efficiency.

[0059] In one implementation, the number of lamination units may be 3, 5, 6, 9 or more.

[0060] The above description of the present application is sufficiently detailed and has certain particularities. Those skilled in the art should understand that the descriptions in the embodiments are merely exemplary, and that all changes made without departing from the true spirit and scope of the present application should fall within the scope of protection of the present application. The scope of protection claimed in the present application is defined by the claims, not by the above description in the embodiments. Furthermore, the embodiments mentioned in the present application are not limited to being implemented individually, and some embodiments can also be implemented in combination.

Claims

1. A lamination unit, characterized in that The lamination unit includes a hard pressing plate, a flexible pressing plate, a driving shaft, a driven shaft and a high-temperature cloth, wherein: An air cavity is provided in the hard pressing plate, the air cavity is connected to the negative pressure device, and a plurality of adsorption grooves connected to the air cavity are provided on the lower surface of the hard pressing plate; The negative pressure device is used to evacuate the air cavity so that the adsorption groove generates an adsorption force, and the flexible pressing plate is adsorbed on the lower surface of the hard pressing plate through the adsorption groove; The driving shaft is arranged at the first end of the hard pressing plate, the driven shaft is arranged at the second end of the hard pressing plate, and the high-temperature cloth is wound around the driving shaft and the driven shaft and covers the hard pressing plate and the flexible pressing plate; The edges of both sides of the high-temperature cloth are provided with padding pieces protruding from the surface of the high-temperature cloth; The upper surface of the hard pressing plate is provided with a vacuum hole in the area not covered by the high-temperature cloth.

2. The lamination unit according to claim 1, wherein The raising member is a continuous raising strip extending along the edge of the high-temperature cloth.

3. The lamination unit according to claim 1, wherein The raising component includes a plurality of raising blocks arranged at intervals along the edge of the high-temperature cloth.

4. The lamination unit according to claim 1, wherein The raising piece is glued or sewn to the edge of the high-temperature cloth.

5. The lamination unit according to claim 1, wherein The hard pressing plate is provided with a plurality of adsorption holes connected with the air cavity. The adsorption holes have adsorption ports located on the lower surface of the hard pressing plate. Each of the adsorption grooves is connected with at least one of the adsorption ports.

6. The lamination unit according to claim 1, wherein A sealing ring is provided at the peripheral edge of the lower surface of the hard pressing plate, and the sealing ring surrounds the peripheral side of the flexible pressing plate.

7. The lamination unit according to claim 1, wherein The hard pressing plate is provided with a heating element, which is at least used to heat the hard pressing plate. The heating element is an electromagnetic heating element, a resistance heating element or an oil heating element.

8. The lamination unit according to claim 1, wherein The laminating unit further includes a driving member, which is used to drive the driving shaft to rotate, thereby driving the high-temperature cloth to rotate.

9. A laminating machine, wherein: The laminating machine comprises n laminating units according to any one of claims 1 to 8 arranged in layers in a vertical direction; When two adjacent laminating units are covered, a laminating cavity is formed, wherein the spacer of the laminating unit located at the bottom supports the flexible pressing plate of the laminating unit located at the top.

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