Laminating unit and laminating machine

Abstract

The utility model provides a laminating unit and a laminating machine, the laminating unit comprises an upper heating plate, a lower heating plate and a pressing plate, the lower heating plate is fixedly attached to the lower surface of the upper heating plate, an air cavity is formed between the lower heating plate and the upper heating plate, the upper heating plate is provided with an air exhaust hole communicated with the air cavity, and the air exhaust hole is communicated with the pressing plate. A plurality of adsorption holes communicated with the air cavity are formed in the lower heating plate, and the adsorption holes are provided with adsorption openings located in the lower surface of the lower heating plate; the air exhaust hole is used for exhausting air in the air cavity so that the multiple adsorption holes can generate adsorption force, and the pressing plate is adsorbed to the lower surface of the lower heating plate through the adsorption holes. The laminating unit provided by the utility model is composed of the upper heating plate, the lower heating plate and the pressing plate, the overall strength of the double-layer heating plate structure formed by fixedly connecting the upper heating plate and the lower heating plate is high, and the double-layer heating plate structure is not prone to deformation during laminating, so that the laminating effect is improved. Besides, the pressing plate is directly attached to the lower surface of the lower heating plate, and in the laminating process, the upper heating plate and the lower heating plate support the pressing plate, so that the pressing plate is prevented from being deformed or damaged due to excessive stress, and the service life of the pressing plate is prolonged.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic module production, and in particular to a laminating unit and a laminating machine. Background Art

[0002] The encapsulation of photovoltaic modules is an important part of the production process of photovoltaic modules, which makes photovoltaic modules weather-resistant. The mainstream equipment used for encapsulation is a laminator, which extracts the air in the photovoltaic module by vacuuming, then heats the EVA to melt it and bond the cell, cover glass and back plate together; finally, atmospheric pressure is introduced to press the cover glass, cell and back plate together.

[0003] The laminating chamber of the laminating machine is provided with a laminating unit. When the adjacent laminating units are covered, the photovoltaic modules located between the adjacent laminating units can be laminated. The existing laminating unit includes a heating plate and a silicone pressing plate adsorbed on the bottom of the heating plate. The overall strength of the single-layer heating plate mechanism is relatively low, and it is easy to deform during lamination, thereby reducing the lamination effect. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a lamination unit, and its detailed technical solution is as follows:

[0005] A laminating unit comprises an upper heating plate, a lower heating plate and a pressing plate, wherein:

[0006] The lower heating plate is fixedly mounted on the lower surface of the upper heating plate, an air cavity is formed between the lower heating plate and the upper heating plate, the air cavity is connected to the negative pressure device, a plurality of adsorption holes connected to the air cavity are arranged on the lower heating plate, and the adsorption holes have adsorption ports located on the lower surface of the lower heating plate;

[0007] The negative pressure device is used to evacuate the air cavity so that a plurality of adsorption holes generate adsorption force, and the pressing plate is adsorbed on the lower surface of the lower heating plate through the adsorption holes.

[0008] The laminating unit provided by the present application is composed of an upper heating plate, a lower heating plate and a pressing plate. The double-layer heating plate structure formed by the upper heating plate and the lower heating plate being fixedly connected has high overall strength and is not easily deformed during lamination, thereby improving the lamination effect. In addition, the pressing plate is directly attached to the lower surface of the lower heating plate. During the lamination process, the upper heating plate and the lower heating plate provide support for the pressing plate, thereby preventing the pressing plate from being deformed or damaged due to excessive force, thereby extending the life of the pressing plate.

[0009] In some embodiments, the pressing plate is a hard silicone plate with a thickness of 2 to 20 mm.

[0010] The 2-20 mm hard silicone sheet is compressed and deformed evenly during the lamination process, which can achieve uniform lamination of photovoltaic modules.

[0011] In some embodiments, a first sealing ring is provided between the peripheral edge of the upper heating plate and the peripheral edge of the lower heating plate, and the first sealing ring surrounds the peripheral side of the air cavity.

[0012] By arranging a first sealing ring between the peripheral edge of the upper heating plate and the peripheral edge of the lower heating plate, the air tightness of the air cavity is improved.

[0013] In some embodiments, the laminating unit further comprises a plurality of transmission connection blocks, and the plurality of transmission connection blocks are respectively connected to the upper heating plate and the lower heating plate.

[0014] The upper heating plate and the lower heating plate are respectively connected through a plurality of transmission connection blocks, so that the upper heating plate and the lower heating plate can both be stressed when the laminating unit is driven, thereby ensuring the stability of the laminating unit during the driving process.

[0015] In some embodiments, a first connecting hole and a second connecting hole are respectively provided at corresponding positions of the side walls of the upper heating plate and the side walls of the lower heating plate; the transmission connecting block includes a fixing block, a first fixing bolt and a second fixing bolt, wherein a third connecting hole and a fourth connecting hole are provided on the fixing block, the first fixing bolt fixes the fixing block to the side wall of the upper heating plate via the third connecting hole and the first connecting hole, and the second fixing bolt fixes the fixing block to the side wall of the lower heating plate via the fourth connecting hole and the second connecting hole.

[0016] A transmission connection block that is easy to disassemble and assemble is provided, which realizes the rapid connection and separation of the upper heating plate and the lower heating plate, thereby facilitating the disassembly and maintenance of the upper heating plate and the lower heating plate.

[0017] In some embodiments, an adsorption groove matching the pressing plate is provided on the lower surface of the lower heating plate, and the pressing plate is adsorbed and fixed in the adsorption groove.

[0018] The pressing plate is adsorbed and fixed in the adsorption groove to prevent the pressing plate from sliding due to uneven force during the lamination process, which will affect the lamination effect.

[0019] In some embodiments, a second sealing ring is disposed at the inner edge of the adsorption groove, and the second sealing ring surrounds the circumference of the pressure plate.

[0020] The buffer contact between the pressing plate and the inner edge of the adsorption groove is achieved, and the squeezing force between the pressing plate and the inner edge of the adsorption groove during the lamination process is alleviated.

[0021] In some embodiments, the pressing plate is a double-layer structure, the hardness of the upper pressing plate is greater than the hardness of the lower pressing plate, and the thickness of the pressing plate is less than the height of the adsorption groove.

[0022] The upper laminate has a greater hardness, making it easier to be adsorbed by the heating plate, while the lower laminate has a lower hardness, which improves the wrapping properties of the laminate.

[0023] In some embodiments, a heating element is disposed on the lower surface of the upper heating plate, and the heating element is used at least to heat the upper heating plate. The heating element is an electromagnetic heating element, a resistance heating element or an oil heating element.

[0024] The upper heating plate has heating performance, so when the two adjacent laminating units are closed to implement lamination of the photovoltaic module located between them, the lower laminating unit can heat the photovoltaic module, thereby melting the EVA in the heated photovoltaic module. Finally, under the continuous lamination, the melted EVA bonds and solidifies the battery sheet, cover glass and back panel together.

[0025] In some embodiments, a first serpentine groove opened along a first horizontal direction is disposed on the lower surface of the upper heating plate; the heating element includes a first electromagnetic coil continuously disposed in the first serpentine groove along the direction of the first serpentine groove.

[0026] The first electromagnetic coil is continuously arranged in the first serpentine groove along the direction of the first serpentine groove, so that the first electromagnetic coil can evenly heat the upper heating plate, thereby improving the uniformity of heating of the photovoltaic module by the pressing plate and ultimately improving the lamination effect.

[0027] In some embodiments, the first serpentine groove is located in the middle area of ​​the lower surface of the upper heating plate, and second serpentine grooves opened along the second horizontal direction are arranged in the two side areas of the lower surface of the upper heating plate; the heating element also includes a second electromagnetic coil continuously arranged in the second serpentine groove along the direction of the second serpentine groove.

[0028] The first serpentine electromagnetic coil is arranged in the middle area of ​​the lower surface of the upper heating plate to ensure the temperature uniformity in the effective heating area corresponding to the pressing plate. The second serpentine electromagnetic coil is arranged on both sides of the lower surface of the upper heating plate to achieve supplementary heating of the upper heating plate.

[0029] In some embodiments, the pitch of the second serpentine groove is smaller than the pitch of the first serpentine groove.

[0030] Since the second serpentine slots are used for supplementary heat, the second serpentine slots are arranged to be relatively sparse, thereby achieving energy saving while achieving the desired heating effect.

[0031] The present application also provides a laminating machine, which includes: n laminating units as described in any of the above items arranged at intervals in the vertical direction; a laminating drive mechanism, the laminating drive mechanism is used to drive the n laminating units to rise and fall so that two adjacent laminating units are closed or opened; when two adjacent laminating units are closed, the photovoltaic components located between the two adjacent laminating units are laminated.

[0032] The laminator provided in the present application is composed of n lamination units arranged at intervals in the vertical direction. When the n lamination units are closed synchronously, two adjacent lamination units can laminate the photovoltaic modules therebetween, thereby improving the lamination efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic structural diagram of a lamination unit in an embodiment of the present application;

[0034] Figure 2 for Figure 1 A cross-sectional view of

[0035] Figure 3 is a schematic cross-sectional structural diagram of the fixing mechanism in the embodiment of the present application;

[0036] Figure 4 It is a schematic diagram of the structure of the upper heating plate in the embodiment of the present application;

[0037] Figure 5 It is a schematic structural diagram of a laminator in an embodiment of the present application at a viewing angle;

[0038] Figure 6 It is a schematic structural diagram of the laminator in the embodiment of the present application from another viewing angle;

[0039] Figures 1 to 5 Included:

[0040] Lamination unit 10:

[0041] Upper heating plate 1, lower heating plate 2, pressing plate 3, first sealing ring 4, transmission connection block 5, second sealing ring 6, first serpentine groove 7, second serpentine groove 8, fixing block 51, first fixing bolt 52, second fixing bolt 53;

[0042] Rack 20;

[0043] Driving mechanism 30. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] The existing laminating unit includes a heating plate and a silicone pressing plate adsorbed on the bottom of the heating plate. The overall strength of the single-layer heating plate mechanism is relatively low and is easily deformed during lamination, thereby reducing the lamination effect.

[0046] To this end, the present application provides a lamination unit, such as Figure 1 to Figure 2 As shown, the laminating unit 10 in the embodiment of the present application includes an upper heating plate 1, a lower heating plate 2 and a pressing plate 3, wherein:

[0047] The lower heating plate 2 is fixedly mounted on the lower surface of the upper heating plate 1, and an air cavity is formed between the lower heating plate 2 and the upper heating plate 1, and the air cavity is connected to the negative pressure device. A plurality of adsorption holes connected to the air cavity are arranged on the lower heating plate, and the adsorption holes have adsorption ports located on the lower surface of the lower heating plate; the negative pressure device is used to evacuate the air cavity so that the plurality of adsorption holes generate adsorption force, and the pressing plate is adsorbed on the lower surface of the lower heating plate through the adsorption holes.

[0048] In one implementation, the upper heating plate and the lower heating plate are connected by bolts, or the upper heating plate and the lower heating plate are connected by snaps.

[0049] In one implementation, the upper heating plate 1 is provided with an air extraction hole connected to the air cavity, the negative pressure device is connected to the air extraction hole, and the lower heating plate 2 is provided with a plurality of adsorption holes connected to the air cavity, and the adsorption holes have adsorption ports located on the lower surface of the lower heating plate 2. Alternatively, the side of the lower heating plate is provided with an air extraction hole connected to the air cavity, the negative pressure device is connected to the air extraction hole, and the lower heating plate 2 is provided with a plurality of adsorption holes connected to the air cavity, and the adsorption holes have adsorption ports located on the lower surface of the lower heating plate 2.

[0050] The air extraction holes are used to extract air from the air cavity so that the adsorption holes on the lower surface of the lower heating plate 2 generate adsorption force. The pressing plate 3 is adsorbed on the lower surface of the lower heating plate 2 through the adsorption holes.

[0051] The laminating unit 10 in the embodiment of the present application is composed of an upper heating plate 1, a lower heating plate 2 and a pressing plate 3. Compared with the existing single-layer heating plate, the double-layer heating plate structure formed by the upper heating plate 1 and the lower heating plate 2 is fixedly connected, which has high overall strength and is not easy to deform during lamination. The pressing plate 3 is directly attached to the lower surface of the lower heating plate 2. During the lamination process, the upper heating plate 1 and the lower heating plate 2 provide support for the pressing plate 3, preventing the pressing plate 3 from being deformed or damaged due to excessive force, thereby extending the life of the pressing plate 3.

[0052] In addition, the pressing plate 3 is fixed to the lower surface of the lower heating plate 2 by adsorption through the adsorption holes. By evacuating the air cavity through the air extraction holes connected to the vacuum device, it is ensured that the pressing plate 3 is adsorbed and fixed to the lower surface of the lower heating plate 2. When the pressing plate 3 needs to be cleaned, maintained or replaced, the air extraction holes stop evacuating air, and the pressing plate 3 can be separated from the lower heating plate 2.

[0053] In order to ensure the airtightness of the air cavity, optionally, a first sealing ring 4 is provided between the peripheral edge of the upper heating plate 1 and the peripheral edge of the lower heating plate 2 , and the first sealing ring 4 surrounds the peripheral side of the air cavity.

[0054] Optionally, the pressing plate 3 is a hard silicone plate with a thickness of 2 to 20 mm. The hard silicone plate with this thickness is uniformly compressed and deformed during the lamination process, so that uniform lamination of the photovoltaic modules can be achieved.

[0055] According to the specifications of the components to be laminated, the thickness of the press plate can be any value of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 mm. When the thickness of the component to be laminated is small, a thicker press plate can be selected, and when the component to be laminated is thick, a thinner press plate can be selected.

[0056] Optionally, the laminating unit 10 in the embodiment of the present application further includes a plurality of transmission connection blocks 5. The transmission connection blocks 4 are respectively connected to the upper heating plate 1 and the lower heating plate 2. For example, Figure 1 In the embodiment, a total of four transmission connection blocks 5 are provided, two of which are provided on one side of the laminating unit 10 , and the other two transmission connection blocks 5 are provided on another opposite side of the laminating unit 10 .

[0057] The upper heating plate 1 and the lower heating plate 2 are respectively connected through the transmission connection block 5. In one implementation, when the driving mechanism of the laminator drives the laminating unit to move, the driving end of the laminating driving mechanism is connected to the transmission connection block 5 on the laminating unit, and when the laminating unit is driven to drive, it is ensured that both the upper heating plate 1 and the lower heating plate 2 can be stressed, thereby ensuring the stability of the laminating unit during the driving process.

[0058] like Figure 3 As shown, optionally, the side wall of the upper heating plate 1 and the side wall of the lower heating plate 2 are respectively provided with a first connection hole and a second connection hole at corresponding positions. Correspondingly, the transmission connection block 5 includes a fixing block 51, a first fixing bolt 52 and a second fixing bolt 53, wherein the fixing block 51 is provided with a third connection hole and a fourth connection hole, the first fixing bolt 52 fixes the fixing block 51 to the side wall of the upper heating plate 1 through the third connection hole and the first connection hole, and the second fixing bolt 53 fixes the fixing block 51 to the side wall of the lower heating plate 2 through the fourth connection hole and the second connection hole, so as to implement the disassembly and maintenance of the upper heating plate 1 and the lower heating plate 2.

[0059] like Figure 2 As shown, optionally, the lower surface of the lower heating plate 2 is provided with an adsorption groove matching the pressing plate 3, and the pressing plate 3 is adsorbed and fixed in the adsorption groove. Since the pressing plate 3 is adsorbed and fixed in the adsorption groove, the pressing plate 3 will not slide due to uneven force during the lamination process, thereby further improving the lamination effect.

[0060] Since the pressing plate 3 will be deformed during the lamination process, the pressing plate 3 will squeeze the inner edge of the adsorption groove. In order to buffer the squeezing force of the pressing plate 3 on the inner edge of the adsorption groove and prevent the lower heating plate 2 from being deformed due to excessive or uneven pressure, optionally, a second sealing ring 6 is provided at the inner edge of the adsorption groove, and the second sealing ring 6 surrounds the circumference of the pressing plate 3. The second sealing ring 6 can achieve buffered contact between the pressing plate 3 and the inner edge of the adsorption groove, thereby alleviating the squeezing force between the pressing plate 3 and the inner edge of the adsorption groove during the lamination process.

[0061] Optionally, the pressing plate has a double-layer structure, the hardness of the upper pressing plate is greater than the hardness of the lower pressing plate, and the thickness of the pressing plate is less than the height of the adsorption groove.

[0062] The upper laminate has a high hardness, which is convenient for being adsorbed by the heating plate, and the lower laminate has a low hardness, which improves the wrapping property of the laminate. In one implementation, the upper laminate is a steel plate, and the lower laminate is a silicone plate attached to the bottom of the upper laminate.

[0063] Optionally, a heating element is provided on the lower surface of the upper heating plate 1, and the heating element is used to heat the upper heating plate 1 at least. The heating element may be, for example, an electromagnetic heating element, a resistance heating element or an oil heating element. By providing the heating element, the upper heating plate 1 has a heating performance, so that when two adjacent laminating units 2 arranged up and down are closed to implement lamination of the photovoltaic module located therebetween, the laminating unit 10 below can heat the photovoltaic module, thereby melting the EVA in the heated photovoltaic module. Finally, under the continuous lamination, the melted EVA bonds and solidifies the battery cell, cover glass and back panel together.

[0064] like Figure 4 As shown, optionally, the lower surface of the upper heating plate 1 is provided with a first serpentine groove 7 opened along a first horizontal direction (such as the X-axis direction in the figure). The heating element includes a first electromagnetic coil continuously arranged in the first serpentine groove 7 along the direction of the first serpentine groove.

[0065] The first electromagnetic coil is continuously arranged in the first serpentine groove 7 along the direction of the first serpentine groove 7, so that the first electromagnetic coil can evenly heat the upper heating plate 1, improve the heating uniformity of the pressing plate 3 on the photovoltaic module, and finally improve the lamination effect of the photovoltaic module.

[0066] Optionally, the first serpentine groove 7 is located in the middle area of ​​the lower surface of the upper heating plate 1, and the second serpentine grooves 8 opened along the second horizontal direction (such as the Y-axis direction in the figure) are arranged in the two side areas of the lower surface of the upper heating plate 1. The heating element also includes a second electromagnetic coil continuously arranged in the second serpentine groove 8 along the direction of the second serpentine groove 8.

[0067] The serpentine first electromagnetic coil 7 is arranged in the middle area of ​​the lower surface of the upper heating plate 1, which can ensure the temperature uniformity in the effective heating area corresponding to the pressing plate 3. By arranging the serpentine second electromagnetic coil 8 on both sides of the lower surface of the upper heating plate 1, the upper heating plate 3 is supplemented with heat, which prevents the temperature at the edge of the heating plate 3 from being significantly lower than other areas of the heating plate 3 due to heat loss.

[0068] Since the second serpentine groove 8 is only used for supplementary heat, while achieving the desired heating effect, in order to achieve energy saving effect, the groove pitch of the second serpentine groove 8 can be set to be smaller than the groove pitch of the first serpentine groove 7.

[0069] The present application also provides a laminating machine. Figures 5 and 6 As shown, the laminator comprises: n laminating units 10 provided in any of the above embodiments arranged at intervals in the vertical direction. A laminating drive mechanism 20, the laminating drive mechanism 20 is used to drive the n laminating units 10 to rise and fall, so that two adjacent laminating units 10 are closed or opened. When two adjacent laminating units 10 are closed, the photovoltaic modules located between the two adjacent laminating units 10 are laminated.

[0070] In one implementation, the lamination drive mechanism is connected to the transmission connection block in the lamination unit 10, and the lamination drive mechanism drives the adjacent lamination units to perform component lamination via the transmission connection block.

[0071] Optionally, in one implementation, the lamination drive mechanism 20 is provided in two groups, and the two groups of lamination drive mechanisms 20 are located on opposite sides of the n lamination units 10, and the two groups of lamination drive mechanisms 20 synchronously drive the n lamination units 10 to rise and fall synchronously from both sides. The two groups of lamination drive mechanisms 20 synchronously drive the n lamination units 10 to rise and fall synchronously from both sides, which can improve the stability of the lamination units 10 during the lifting process, and ensure that the adjacent lamination units 10 can be smoothly covered.

[0072] Optionally, in one implementation, the laminating drive mechanism 20 includes a lifting drive device and a telescopic connector, the upper end of the telescopic connector is connected to the laminating unit 10 located at the top, the lower end of the telescopic connector is connected to the laminating unit 10 located at the bottom, and the remaining laminating units 10 are all connected to the telescopic connector. The lifting drive device is used to drive the telescopic connector to extend and retract in the vertical direction to drive the n laminating units 10 to rise and fall synchronously. The lifting drive device can be, for example, a hydraulic cylinder, and the telescopic connector can be a flexible connector such as a chain or a wire rope.

[0073] Optionally, the laminating machine includes a frame 30 , and the laminating drive mechanism 20 and n laminating units 10 are all installed on the frame 30 .

[0074] The present application is described in sufficient detail above with certain particularity. It should be understood by those skilled in the art that the description in the embodiments is merely exemplary, and 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, rather than by the above description in the embodiments.

Claims

1. A lamination unit, characterized in that The laminating unit comprises an upper heating plate, a lower heating plate and a pressing plate, wherein: The lower heating plate is fixedly mounted on the bottom of the upper heating plate, an air cavity is formed between the lower heating plate and the upper heating plate, the air cavity is connected to the negative pressure device, and a plurality of adsorption holes connected to the air cavity are arranged on the lower heating plate, and the adsorption holes have adsorption ports located on the lower surface of the lower heating plate; The negative pressure device is used to evacuate the air cavity so that the adsorption holes generate adsorption force, and the pressing plate is adsorbed on the lower surface of the lower heating plate through the adsorption holes.

2. The lamination unit according to claim 1, characterized in that The pressing plate is a hard silica gel plate with a thickness of 2 to 20 mm.

3. The lamination unit according to claim 1, characterized in that A first sealing ring is provided between the peripheral edge of the upper heating plate and the peripheral edge of the lower heating plate, and the first sealing ring surrounds the peripheral side of the air cavity.

4. The lamination unit according to claim 1, characterized in that The laminating unit further comprises a plurality of transmission connection blocks, and the plurality of transmission connection blocks are respectively connected to the upper heating plate and the lower heating plate.

5. The lamination unit according to claim 4, characterized in that: A first connection hole and a second connection hole are respectively provided at corresponding positions of the side wall of the upper heating plate and the side wall of the lower heating plate; The transmission connecting block includes a fixed block, a first fixing bolt and a second fixing bolt, wherein the fixed block is provided with a third connecting hole and a fourth connecting hole, the first fixing bolt fixes the fixed block to the side wall of the upper heating plate via the third connecting hole and the first connecting hole, and the second fixing bolt fixes the fixed block to the side wall of the lower heating plate via the fourth connecting hole and the second connecting hole.

6. The lamination unit according to claim 1, characterized in that An adsorption groove matching the pressing plate is provided on the lower surface of the lower heating plate, and the pressing plate is adsorbed and fixed in the adsorption groove.

7. The lamination unit according to claim 6, characterized in that A second sealing ring is arranged at the inner edge of the adsorption groove, and the second sealing ring surrounds the circumference of the pressing plate.

8. The lamination unit according to claim 6, characterized in that The pressing plate is a double-layer structure, and the thickness of the pressing plate is smaller than the height of the adsorption tank.

9. The lamination unit according to claim 1, characterized in that A heating element is disposed on the lower surface of the upper heating plate. The heating element is used at least to heat the upper heating plate. The heating element is an electromagnetic heating element, a resistance heating element or an oil heating element.

10. The lamination unit according to claim 9, characterized in that The lower surface of the upper heating plate is provided with a first serpentine groove opened along a first horizontal direction; The heating element includes a first electromagnetic coil continuously arranged in the first serpentine groove along the direction of the first serpentine groove.

11. The lamination unit according to claim 10, characterized in that The first serpentine groove is located in the middle area of ​​the lower surface of the upper heating plate, and the second serpentine grooves opened along the second horizontal direction are arranged in the two side areas of the lower surface of the upper heating plate; The heating element also includes a second electromagnetic coil continuously arranged in the second serpentine groove along the direction of the second serpentine groove.

12. The lamination unit according to claim 11, characterized in that The groove pitch of the second serpentine groove is smaller than the groove pitch of the first serpentine groove.

13. A laminating machine, characterized in that: The laminator comprises: n lamination units according to any one of claims 1 to 12 arranged at intervals in the vertical direction; A lamination driving mechanism, the lamination driving mechanism is used to drive the n lamination units to rise and fall, so that two adjacent lamination units are closed or opened; When two adjacent lamination units are closed, the photovoltaic components located between the two adjacent lamination units are laminated.

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