Hail-resistant TOPCon photovoltaic module multi-layer composite glass laminating device and method

Abstract

The present invention discloses a multi-layer composite glass lamination device and method for hail-resistant TOPCon photovoltaic modules, comprising a base, support legs and an operating table, wherein vacuum machines are fixedly provided at both ends of the side walls of the operating table, a control assembly is fixedly provided at the side walls of the base, a connection box is fixedly provided on the side walls of the control assembly, and a plurality of pressure plates are provided inside the connection box. According to the multi-layer composite glass lamination device and method for hail-resistant TOPCon photovoltaic modules, when the temperature is higher, the long rod gradually moves upward, and the number of counterweight blocks dropped onto the pressure plates increases, and the pressure required in different time periods of continuous temperature increase also needs to change accordingly. The lamination device may not be able to meet the fluidity requirements by simply increasing the temperature, and it is necessary to promote the penetration of the adhesive film by gradually increasing the pressure to avoid the situation where the surface is hardened but the interior is not fully fluid. The fluidity is significantly improved, forming a closer physical contact, and effectively improving the lamination efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of composite glass lamination, in particular to a multi-layer composite glass lamination device and method for a hail-resistant TOPCon photovoltaic module. Background Art

[0002] A solar photovoltaic module laminator is a mechanical device that presses EVA, solar cells, tempered glass, and backing film into a rigid whole under high-temperature vacuum conditions. The laminator is one of the specialized production equipment for chip-type multilayer ceramic capacitors. The lamination process is a crucial step in the production of photovoltaic modules, as it is directly related to the module's molding quality, flatness, and the removal of internal gas.

[0003] Traditional photovoltaic module lamination devices mostly use static pressing, which often cannot ensure that all bubbles on the surface are completely expelled at different heating stages during lamination. At the same time, static pressing cannot increase the pressure according to the different heating levels, which can easily cause problems such as uneven pressing and insufficient flatness. Therefore, we propose a multi-layer composite glass lamination device and method for hail-resistant TOPCon photovoltaic modules. Summary of the Invention

[0004] The present invention provides the following technical solution: a multi-layer composite glass laminating device for hail-resistant TOPCon photovoltaic modules, comprising a base, support legs, and an operating table, wherein vacuum machines are fixedly installed at both ends of the side walls of the operating table, a control assembly is fixedly installed on the side walls of the base, a connection box is fixedly installed on the side walls of the control assembly, and a plurality of pressure plates are provided inside the connection box;

[0005] The outer wall of the connection box is fixed with four groups of fixing blocks, each group of fixing blocks is set with three, and the four groups of fixing blocks correspond to each other in pairs. Springs are fixed on the side walls of the two corresponding groups of fixing blocks that are close to each other, and the other ends of the multiple springs are fixed with connecting plates. A long rod is provided at the side wall of the connection box, and the corresponding two groups of fixing blocks are on both sides of the long rod. The side wall of the connecting plate away from the spring is attached to both sides of the long rod. An expansion assembly is provided at the bottom of the long rod, and the expansion assembly includes a connecting rod arranged at the bottom of the long rod. Four scrapers are fixed at the bottom of the connecting rod;

[0006] The inner wall of the connection box is provided with a pushing assembly, the tops of the plurality of pressure plates are provided with a fixing box, the plurality of pressure plates are connected to the pushing assembly through the fixing box fixed on the top, and the top of the operating table is provided with a vacuum box.

[0007] Preferably, a plurality of openings are provided at the bottom of the connection box, and the number of the openings matches the number of the pressing plates, and the pressing plates pass through the vacuum box and are connected to the connection box.

[0008] Preferably: the control component includes an L-shaped fixing block located at the side wall of the base, a circular hole is opened on the surface of the L-shaped fixing block, the inner wall of the circular hole is provided with a threaded groove, a threaded rod adapted to the size of the threaded groove is passed through the inner wall of the L-shaped fixing block, a knob is fixed at the top end of the threaded rod, a pressing plate is fixed at the bottom end of the threaded rod, a moving rod is slidably provided on the side of the side wall of the base close to the knob, and the top of the moving rod is connected to the connecting box.

[0009] Preferably, the position of the long rod corresponds to the position of the connecting plate, and the long rod is perpendicular to the connecting plate and is arranged on the side wall of the connection box.

[0010] Preferably, magnetic stones are provided at the connection points of the four scrapers.

[0011] Preferably, the top of the fixed box is provided with an opening on a side close to the storage cavity, and the size of the opening matches the size of the storage cavity.

[0012] Preferably: the pushing assembly includes a second rack arranged on the inner wall of the connecting box, a folding plate is fixedly provided laterally on the side wall of the second rack, a storage cavity is provided on the top of the folding plate, and a fixed box is provided correspondingly at the bottom of the storage cavity, the pushing assembly also includes a gear located on the inner wall of the connecting box, the upper end of the gear is provided with a first rack meshed with it, the side wall of the first rack is fixedly connected to a connecting plate at the end away from the gear, and the upper end of the gear is provided with a second rack meshed with it.

[0013] Preferably, the expansion assembly includes a placement box provided through the bottom of the long rod, an expansion chamber is provided inside the placement box, a partition is provided on the inner wall of the placement box for sliding, and the scraper is connected to the partition through a connecting rod provided at the top.

[0014] Preferably, a plurality of circular holes are provided on the surface of the vacuum box at a side close to the connection box, and a rubber baffle is provided on the sidewall of the circular hole.

[0015] A method for laminating multi-layer composite glass for hail-resistant TOPCon photovoltaic modules, using the aforementioned multi-layer composite glass laminating device for hail-resistant TOPCon photovoltaic modules, comprises the following steps:

[0016] Step 1: After placing the glass plate on the operating table, rotate the knob at the top of the threaded rod. The movable rod moves downward along with the threaded rod. The other end of the movable rod is fixed to the motor connected to the side wall of the box. The movable rod adjusts the pressure of the pressing plate when it moves.

[0017] Step 2: The vacuum machine installed on the side wall of the operating table starts to operate, and the pressure plate moves downward after the vacuum box is evacuated;

[0018] Step 3: After the pressing plate heats the glass plate, the temperature inside the vacuum box gradually increases, and the expansion fluid drives the partition to gradually move upward inside the placement box. The long rod moves upward with the placement box, and the connecting plate moves to open the opening at the bottom of the storage chamber, allowing the counterweight block to slide onto the pressing plate. When the partition moves, it also drives the scraper to move upward.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the multi-layer composite glass laminating device of the hail-resistant TOPCon photovoltaic module, as the temperature increases, the long rod gradually moves upward, and the number of counterweights dropped onto the pressure plate increases. The required pressure also changes accordingly as the temperature continues to rise. The laminating device may not be able to meet fluidity requirements by simply increasing the temperature. Gradually increasing the pressure is necessary to promote film penetration to avoid surface hardening without sufficient internal fluidity. Furthermore, rising temperature intensifies the movement of the film's molecular segments, significantly improving fluidity. At this time, applying greater pressure and combining it with a vacuum chamber can force the film to quickly fill micron-level pits, scratches, or impurity gaps on the glass surface, forming a closer physical contact and effectively improving lamination efficiency.

[0021] 2. The multi-layer composite glass laminating device for the hail-resistant TOPCon photovoltaic module starts operating through a vacuum machine installed on the side wall of the operating table, which evacuates the vacuum box to ensure that the vacuum box is in a relatively vacuum state during the lamination process. During the lamination process, if air remains between the glass plate and the interlayer, it will form bubbles, resulting in a decrease in light transmittance or mechanical property defects. In a vacuum environment, the air is extracted, and the volume of the bubbles expands and escapes due to the decrease in air pressure. Finally, they are completely eliminated during the hot pressing stage. If bubbles remain, it is easy to cause uneven pressing of the glass plates during lamination. The bubbles are not even and flat enough, and there is air inside the bubbles, which cannot transmit the impact force. When hail hits the area near the bubbles, the impact force cannot be evenly dispersed to the entire glass surface through the film, but is concentrated at the junction of the glass and the film at the edge of the bubble, which can easily cause the glass to be subjected to excessive force locally, directly shattering or producing radial cracks. Tiny cracks will gradually lengthen under the temperature difference between day and night and the hot and cold cycle, and eventually penetrate the entire glass, causing the plate to completely fail. Expelling bubbles effectively improves the flatness and firmness of the glass plate after lamination, and avoids the generation of cracks after hail impact.

[0022] 3. The multi-layer composite glass laminating device of the hail-resistant TOPCon photovoltaic module also gradually moves upward through the partition. Since the upper end of the partition is connected to the scraper via a fixed connecting rod, when the pressing plate laminates the glass sheets to be laminated, the temperature gradually increases, driving the scraper to move upward, scraping off excess glue overflowing from the four corners of the laminated glass sheets, preventing edge defects after the overflow glue solidifies, and improving the appearance consistency. However, the overflow glue that is not scraped off may cause burrs, bubbles or wrinkles after cooling. Especially when multiple layers of glass are stacked, the accumulation of glue on the edges will cause irregular glass corners, affecting the accuracy of subsequent edging and drilling processes, and even causing the finished product to be scrapped. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 This is the second schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 3 The third schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 4 This is the fourth schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 5 This is the fifth schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 6 The sixth schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 7 for Figure 6 A magnified view of the structure at point B in the middle;

[0030] Figure 8 It is a schematic diagram of the structure of the operating table of the present invention;

[0031] Figure 9 This is a schematic diagram of the connection box structure of the present invention;

[0032] Figure 10 This is the second structural diagram of the connection box of the present invention;

[0033] Figure 11 for Figure 10 A magnified view of the structure at center A;

[0034] Figure 12 This is a schematic diagram of the storage cavity structure of the present invention;

[0035] Figure 13 It is a schematic diagram of the vacuum box structure of the present invention.

[0036] In the figure: 1. Base; 2. Support legs; 3. Operating table; 4. Vacuum box; 5. Connecting box; 6. L-shaped fixing block; 7. Threaded rod; 8. Moving rod; 9. Fixing block; 10. Long rod; 11. Placement box; 12. Expansion chamber; 13. Connecting rod; 14. Scraper; 15. Fixing box; 16. Pressing plate; 17. Vacuum machine; 18. First rack; 19. Gear; 20. Second rack; 21. Folding plate; 22. Storage chamber; 23. Connecting plate. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] See also Figures 1-13 The multi-layer composite glass laminating device for hail-resistant TOPCon photovoltaic modules includes a base 1, support legs 2, and an operating table 3. Vacuum machines 17 are fixed to both ends of the side walls of the operating table 3. A control component is fixed to the side wall of the base 1. A connection box 5 is fixed to the side wall of the control component. A plurality of pressure plates 16 are provided inside the connection box 5.

[0039] It should be noted that the setting of the control component cooperates with the pressing plate 16 to measure the thickness of the glass plate to be laminated before heating and pressing, thereby controlling the downward pressure of the pressing plate 16 to avoid the glass plate being broken due to excessive pressure, or the situation where the pressure is too low to be compacted.

[0040] The outer wall of the connection box 5 is fixed with four groups of fixing blocks 9, each group of fixing blocks 9 is set with three, and the four groups of fixing blocks 9 correspond to each other in pairs. The corresponding two groups of fixing blocks 9 are fixed with springs on the side walls close to each other, and the other ends of the multiple springs are fixed with connecting plates 23. A long rod 10 is provided at the side wall of the connection box 5, and the corresponding two groups of fixing blocks 9 are on both sides of the long rod 10. The side wall of the connecting plate 23 away from the spring is attached to both sides of the long rod 10. An expansion component is provided at the bottom of the long rod 10, and the expansion component includes a connecting rod 13 arranged at the bottom of the long rod 10. Four scrapers 14 are fixed to the bottom of the connecting rod 13;

[0041] It should be noted that since the vacuum box 4 is a vacuum environment, when the expansion liquid stored in the expansion chamber 12 expands at a high temperature, the expanded expansion liquid drives the partition to gradually move upward inside the placement box 11. At this time, the long rod 10 connected to the top of the partition follows the placement box 11 to move upward. When the long rod 10 passes the connecting plate 23 at the bottom, the long rod 10 squeezes the spring and the connecting plate 23 moves toward the side close to the fixed block 9. The farther the long rod 10 moves, the higher the temperature in the vacuum box 4, and the more counterweights are pushed down, ensuring that the pressure of the pressure rod 16 on the glass plate increases with the increase in temperature. When the partition moves upward, it drives the connecting rod 13 upward, and the four scrapers 14 scrape off the glue overflowing around the glass plate to prevent edge defects from forming after the overflow glue solidifies.

[0042] The inner wall of the connecting box 5 is provided with a pushing assembly, a fixing box 15 is provided on the top of the multiple pressing plates 16, and the multiple pressing plates 16 are connected to the pushing assembly through the fixing box 15 on the top. A vacuum box 4 is provided on the top of the operating table 3.

[0043] It should be noted that when the interior of the vacuum box 4 is in a relative vacuum state, it not only reduces the appearance of bubbles in the glass plates during lamination, but also provides a vacuum environment for the heated pressing plate 16, so that after the pressing plate 16 is heated, it reduces external interference when it is heated under vacuum conditions. After the temperature rises, the expansion liquid expands and pushes the long rod 10 to move upward gradually. After the long rod 10 squeezes the connecting plate 23, more counterweight blocks fall, ensuring that the pressure adapted to the equipment under different temperatures during lamination will also change accordingly, avoiding the situation where the surface is hardened but the internal flow is not sufficient. When the partition moves upward, the four scrapers 14 move upward to scrape off excess glue overflowing from the four corners of the glass plate during lamination.

[0044] In an optional embodiment, a plurality of openings are provided at the bottom of the connection box 5 , and the number of the openings matches the number of the pressing plates 16 . The pressing plates 16 pass through the vacuum box 4 and are connected to the connection box 5 .

[0045] It should be noted that in the initial state, the top of the pressing plate 16 is fixed inside the connecting box 5, and the bottom heating plate part passes through the vacuum box 4 and is located at the top of the vacuum box 4. When lamination is required, the pressing plate 16 moves downward. When the pressing plate 16 moves downward, it ensures that the vacuum box 4 is in a relative vacuum state, reducing the entry of airflow.

[0046] In an optional embodiment: the control component includes an L-shaped fixing block 6 located at the side wall of the base 1, a circular hole is opened on the surface of the L-shaped fixing block 6, and a threaded groove is provided on the inner wall of the circular hole. A threaded rod 7 that is adapted to the size of the threaded groove is passed through the inner wall of the L-shaped fixing block 6, a knob is fixed on the top end of the threaded rod 7, and a pressing plate is fixed on the bottom end of the threaded rod 7. A moving rod 8 is slidably provided on the side wall of the base 1 close to the knob, and the top of the moving rod 8 is connected to the connecting box 5.

[0047] It should be noted that after placing the glass plate on the operating table 3, rotate the knob on the top of the threaded rod 7 until the bottom pressing plate touches the glass plate and then stops rotating. When the threaded rod 7 moves downward, the moving rod 8 follows and moves downward. Since there are multiple scales on the controller, and the values ​​of the scales are arranged in order from large to small, after the moving rod 8 stops moving, the pressure of the pressing plate 16 on the glass plate is adjusted by observing the size of the scale. The farther the moving rod 8 moves downward, the smaller the pressure of 16 on the glass plate, so as to prevent the glass plate from being broken due to excessive pressure of the pressing plate 16 when it is thin.

[0048] In an optional embodiment, the position of the long rod 10 corresponds to the position of the connecting plate 23 , and the long rod 10 is perpendicular to the connecting plate 23 and is arranged on the side wall of the connecting box 5 .

[0049] It should be noted that since the position of the long rod 10 corresponds to the position of the connecting plate 23, it is ensured that when the long rod 10 moves upward to a position close to the connecting plate 23, it can smoothly push the connecting plate 23 to move, thereby enhancing the accuracy of the equipment.

[0050] In an optional embodiment, magnetic stones are provided at the connection points of the four scrapers 14 .

[0051] It should be noted that when multi-layer glass panels of different sizes need to be laminated, since the four corners of the four scrapers 14 are connected by magnetic stones, it is ensured that the scrapers 14 are always in contact with the four edges of the glass panels, avoiding the inability to successfully scrape off the glue overflowing from the four corners due to different sizes.

[0052] In an optional embodiment, the top of the fixed box 15 is provided with an opening on a side close to the storage cavity 22 , and the size of the opening matches the size of the storage cavity 22 .

[0053] It should be noted that, since the size of the fixed box 15 matches the size of the storage cavity 22 , when the folding plate 21 is pushed open, the counterweight can slide from the fixed box 15 onto the pressure plate 16 to pressurize the glass plate.

[0054] In an optional embodiment: the pushing assembly includes a second rack 20 arranged on the inner wall of the connecting box 5, a folding plate 21 is fixedly provided laterally on the side wall of the second rack 20, a storage cavity 22 is provided on the top of the folding plate 21, and a fixed box 15 is provided at the bottom of the storage cavity 22. The pushing assembly also includes a gear 19 located on the inner wall of the connecting box 5, the upper end of the gear 19 is provided with a first rack 18 meshing with it, the side wall of the first rack 18 is fixedly connected to a connecting plate 23 at the end away from the gear 19, and the upper end of the gear 19 is provided with a second rack 20 meshing with it.

[0055] It should be noted that when the connecting plate 23 moves, it drives the gear 19 to rotate, and the rotated gear 19 drives the second rack 20 engaged at the bottom to move in the opposite direction of the first rack 18. Since the end of the second rack 20 is fixedly connected to the folding plate 21, when the second rack 20 pulls the folding plate 21 to move, the bottom opening of the storage chamber 22 is opened, and the counterweight blocks stored in the storage chamber 22 slide through the inside of the fixed box 15 and fall onto the pressure plate 16. When the temperature is higher, the long rod 10 gradually moves upward, and the number of counterweight blocks falling onto the pressure plate 16 increases. The pressure required in different time periods when the temperature continues to rise also needs to change accordingly. The laminating device may not be able to meet the fluidity requirements by simply increasing the temperature. It is necessary to promote the penetration of the film by gradually increasing the pressure to avoid the situation where the surface is hardened but the internal flow is not sufficient.

[0056] In an optional embodiment: the expansion assembly includes a placement box 11 that is arranged through the bottom of the long rod 10, an expansion chamber 12 is provided inside the placement box 11, a partition is slidingly provided on the inner wall of the placement box 11, and the scraper 14 is connected to the partition through a connecting rod 13 set at the top.

[0057] It should be noted that when the partition gradually moves upward, since the upper end of the partition is connected to the scraper 14 by a fixed connecting rod 13, when the pressure plate 16 laminates the glass plates to be laminated, the temperature gradually increases, driving the scraper 14 to move upward, scraping off the excess glue overflowing from the four corners of the laminated glass plates, preventing edge defects from forming after the overflowed glue solidifies, and improving the consistency of the appearance.

[0058] In an optional embodiment, a plurality of circular holes are provided on the surface of the vacuum box 4 at a side close to the connection box 5 , and rubber baffles are provided on the side walls of the circular holes.

[0059] It should be noted that when the pressure plate 16 moves downward, a baffle is provided in the circular hole opened on the top of the vacuum box 4, which effectively ensures that the entry of air is reduced while the pressure plate 16 moves, thereby reducing the difficulty of eliminating bubbles caused by excessive outside air entering the vacuum box. The discharge of bubbles effectively improves the flatness and firmness of the glass plate after lamination, and avoids the formation of cracks caused by hail impact.

[0060] This embodiment also discloses a method for laminating multi-layer composite glass for a hail-resistant TOPCon photovoltaic module, which uses the aforementioned multi-layer composite glass laminating device for a hail-resistant TOPCon photovoltaic module, and includes the following steps:

[0061] Step 1: After placing the glass plate on the operating table 3, rotate the knob at the top of the threaded rod 7, and the movable rod 8 moves downward along with the threaded rod 7. The other end of the movable rod 8 is fixed to the motor on the side wall of the connection box 5. When the movable rod 8 moves, the pressure of the pressing plate 16 is adjusted;

[0062] Step 2: The vacuum machine 17 installed on the side wall of the operating table 3 starts to operate, and the pressure plate 16 moves downward after the vacuum box 4 is evacuated;

[0063] Step 3: After the pressing plate 16 heats the glass plate, the temperature inside the vacuum box 4 gradually increases, and the expansion liquid drives the partition to gradually move upward inside the placement box 11. The long rod 10 moves upward following the placement box 11, and the connecting plate 23 moves to open the opening at the bottom of the storage chamber 22 so that the counterweight block slides onto the pressing plate 16. When the partition moves, it also drives the scraper 14 to move upward.

[0064] Working principle: when it is necessary to laminate multi-layer composite glass, after placing the glass sheet on the operating table 3, rotate the knob at the top of the threaded rod 7 until the bottom pressing plate touches the glass sheet and then stop rotating. When the threaded rod 7 moves downward, the movable rod 8 moves downward accordingly. Since the controller is provided with multiple scales, and the values ​​of the scales are arranged in order from large to small, after the movable rod 8 stops moving, the pressure of the pressing plate 16 on the glass sheet is adjusted by observing the size of the scale. The further the movable rod 8 moves downward, the less pressure 16 puts on the glass sheet, so as to prevent the glass sheet from being broken due to excessive pressure from the pressing plate 16 when the glass sheet is thin.

[0065] Since the side walls of the vacuum box 4 are retractable fixed plates, when the equipment is not started, the initial position of the vacuum box 4 is in a retracted state on the side close to the connection box 5. After the multi-layer glass is placed on the surface of the operating table 3, the vacuum box 4, which was originally in a retracted state, moves downward until it is in contact with the surface of the operating table 3. At this time, the vacuum machine 17 set on the side wall of the operating table 3 starts to operate to evacuate the vacuum box 4 to ensure that the vacuum box 4 is in a relatively vacuum state during the lamination process. During the lamination process, if there is residual air between the glass plate and the interlayer, it will form a gas Bubbles, resulting in reduced light transmittance or mechanical property defects. In a vacuum environment, air is extracted, and the volume of bubbles expands and escapes due to the reduction in air pressure, and is eventually completely eliminated during the hot pressing stage. If too many bubbles are not eliminated, when hail hits the area near the bubbles, it is easy to cause excessive stress on the glass locally, causing direct shattering or radial cracks. Expelling bubbles effectively improves the flatness and firmness of the glass sheet after lamination, and avoids the generation of cracks caused by hail impact. When the vacuum box 4 is in a relatively vacuum environment, the pressing plate 16 moves downward to laminate and heat the glass sheet.

[0066] Since the vacuum box 4 is a vacuum environment, when the pressure plate 16 heats the glass plate and the air does not circulate, the temperature in the vacuum box 4 gradually rises. When the expansion liquid stored in the expansion chamber 12 expands at a high temperature, the expanded expansion liquid drives the partition to gradually move upward inside the placement box 11. At this time, the long rod 10 connected to the top of the partition follows the placement box 11 to move upward. Since the side wall of the long rod 10 is vertically provided with three connecting plates 23, when the long rod 10 passes the connecting plate 23 at the bottom, the long rod 10 squeezes the spring and the connecting plate 23 moves to the side close to the fixed block 9. Since the connecting plate 23 is fixed with the first rack 18 and the gear 19 through the outer wall, when the connecting plate 23 moves, it drives the gear 19 to rotate. The rotated gear 19 drives the second rack 20 meshed at the bottom to move in the opposite direction of the first rack 18. The end is fixedly connected to a folding plate 21. When the second rack 20 pulls the folding plate 21 to move, the bottom opening of the storage chamber 22 is opened, and the counterweight blocks stored in the storage chamber 22 slide onto the pressure plate 16 through the fixed box 15. When the temperature is higher, the long rod 10 gradually moves upward, and the number of counterweight blocks dropped onto the pressure plate 16 increases. The pressure required in different time periods of continuous temperature increase also needs to change accordingly. The laminating device may not be able to meet the fluidity requirements by simply increasing the temperature. It is necessary to gradually increase the pressure to promote the penetration of the adhesive film to avoid the situation where the surface is hardened but the internal fluidity is not sufficient. The temperature increase will intensify the movement of the molecular chain segments of the adhesive film, and the fluidity will be significantly improved. At this time, superimposing a greater pressure and cooperating with the vacuum box 4 can force the adhesive film to quickly fill the micron-level pits, scratches or impurity gaps on the glass surface, forming a closer physical contact, thereby effectively improving the lamination efficiency.

[0067] When the partition gradually moves upward, since the upper end of the partition is connected to the scraper 14 by a fixed connecting rod 13, when the pressure plate 16 laminates the glass plates to be laminated, the temperature gradually increases and drives the scraper 14 to move upward, scraping off the excess glue overflowing from the four corners of the laminated glass plates, preventing edge defects from forming after the overflowing glue solidifies, thereby improving the appearance consistency. The overflowing glue that is not scraped off may produce burrs, bubbles or wrinkles after cooling. Especially when multiple layers of glass are stacked, the accumulation of glue on the edges will cause irregular corners of the glass, affecting the accuracy of subsequent edging, drilling and other processes, and even causing the finished product to be scrapped.

[0068] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multi-layer composite glass laminating device for hail-resistant TOPCon photovoltaic modules, comprising a base (1), support legs (2) and an operating table (3), wherein both ends of the side walls of the operating table (3) are fixedly provided with a vacuum machine (17), characterized in that: A control assembly is fixedly provided on the side wall of the base (1), a connection box (5) is fixedly provided on the side wall of the control assembly, and a plurality of pressure plates (16) are provided inside the connection box (5); Four groups of fixed blocks (9) are fixed on the outer wall of the connection box (5), and each group of fixed blocks (9) is provided with three. The four groups of fixed blocks (9) correspond to each other in pairs. Springs are fixed on the side walls of the two corresponding groups of fixed blocks (9) that are close to each other. The other ends of the multiple springs are fixed with connecting plates (23). A long rod (10) is provided on the side wall of the connection box (5). The two corresponding groups of fixed blocks (9) are on both sides of the long rod (10). The side wall of the connecting plate (23) away from the spring is attached to both sides of the long rod (10). An expansion component is provided at the bottom of the long rod (10). The expansion component includes a connecting rod (13) provided at the bottom of the long rod (10). Four scrapers (14) are fixed on the bottom of the connecting rod (13). The inner wall of the connection box (5) is provided with a pushing assembly, the tops of the plurality of pressure plates (16) are provided with a fixing box (15), the plurality of pressure plates (16) are connected to the pushing assembly via the fixing box (15) provided on the tops, and the top of the operating table (3) is provided with a vacuum box (4).

2. The multi-layer composite glass laminating device for hail-resistant TOPCon photovoltaic modules according to claim 1, characterized in that: The bottom of the connection box (5) is provided with a plurality of openings, and the number of the plurality of openings matches the number of the pressing plates (16). The pressing plates (16) penetrate the vacuum box (4) and are connected to the connection box (5).

3. The multi-layer composite glass laminating device for hail-resistant TOPCon photovoltaic modules according to claim 1, characterized in that: The control assembly includes an L-shaped fixing block (6) located on the side wall of the base (1), a circular hole is opened on the surface of the L-shaped fixing block (6), a threaded groove is provided on the inner wall of the circular hole, a threaded rod (7) adapted to the size of the threaded groove is passed through the inner wall of the L-shaped fixing block (6), a knob is fixed on the top end of the threaded rod (7), a pressing plate is fixed on the bottom end of the threaded rod (7), a moving rod (8) is slidably provided on the side of the side wall of the base (1) close to the knob, and the top of the moving rod (8) is connected to the connection box (5).

4. The multi-layer composite glass laminating device for hail-resistant TOPCon photovoltaic modules according to claim 1, characterized in that: The position of the long rod (10) corresponds to the position of the connecting plate (23), and the long rod (10) is arranged perpendicular to the connecting plate (23) at the side wall of the connecting box (5).

5. The multi-layer composite glass laminating device for hail-resistant TOPCon photovoltaic modules according to claim 1, characterized in that: Magnetic stones are provided at the connection points of the four scrapers (14).

6. The multi-layer composite glass laminating device for hail-resistant TOPCon photovoltaic modules according to claim 1, characterized in that: The top of the fixed box (15) is provided with an opening on a side close to the storage cavity (22), and the size of the opening matches the size of the storage cavity (22).

7. The multi-layer composite glass laminating device for hail-resistant TOPCon photovoltaic modules according to claim 1, characterized in that: The pushing assembly includes a second rack (20) arranged on the inner wall of the connecting box (5), a folding plate (21) is fixedly provided on the side wall of the second rack (20) in a transverse direction, a storage cavity (22) is provided on the top of the folding plate (21), and a fixed box (15) is provided at the bottom of the storage cavity (22). The pushing assembly also includes a gear (19) located on the inner wall of the connecting box (5), a first rack (18) meshed with the gear (19) is provided at the upper end, a connecting plate (23) is fixedly connected to the side wall of the first rack (18) at the end away from the gear (19), and a second rack (20) meshed with the gear (19) is provided at the upper end.

8. The multi-layer composite glass laminating device for hail-resistant TOPCon photovoltaic modules according to claim 1, characterized in that: The expansion assembly comprises a placement box (11) provided through the bottom of the long rod (10), an expansion chamber (12) is provided inside the placement box (11), a partition is slidably provided on the inner wall of the placement box (11), and the scraper (14) is connected to the partition via a connecting rod (13) provided on the top.

9. The multi-layer composite glass laminating device for hail-resistant TOPCon photovoltaic modules according to claim 1, characterized in that: The surface of the vacuum box (4) is provided with a plurality of circular holes on a side close to the connection box (5), and the side walls of the circular holes are provided with rubber blocking pieces.

10. A method for laminating multi-layer composite glass for hail-resistant TOPCon photovoltaic modules, using the device for laminating multi-layer composite glass for hail-resistant TOPCon photovoltaic modules according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: After placing the glass plate on the operating table (3), rotate the knob at the top of the threaded rod (7), and the moving rod (8) moves downward following the threaded rod (7). The other end of the moving rod (8) is fixed to the motor on the side wall of the connecting box (5). When the moving rod (8) moves, the pressure of the pressure plate (16) is adjusted; Step 2: The vacuum machine (17) provided on the side wall of the operating table (3) starts to operate, and the pressure plate (16) moves downward after the vacuum box (4) is evacuated; Step 3: After the pressing plate (16) heats the glass plate, the temperature in the vacuum box (4) gradually rises, and the expansion fluid drives the partition to gradually move upward inside the placement box (11). The long rod (10) moves upward following the placement box (11), and the connecting plate (23) moves to open the opening at the bottom of the storage chamber (22) so that the counterweight slides onto the pressing plate (16). When the partition moves, it also drives the scraper (14) to move upward.

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