Photovoltaic power generation panel assembly structure

Abstract

The application discloses a kind of photovoltaic power generation cell panel assembly structure, it is related to photovoltaic technical field, specifically including laminated component and frame, the laminated piece includes backboard, sealing side frame and glass plate, the top of the backboard is sequentially provided with lower encapsulation adhesive film, cell piece and upper encapsulation adhesive film from bottom to top, the sealing side frame is set in the periphery of cell piece, its bottom is attached with backboard lower end, and sealing side frame is located to upper encapsulation adhesive film edge.This application utilizes sealing side frame to limit cell piece, backboard, glass plate, upper and lower encapsulation adhesive film, prevent the occurrence of laminated displacement, improve production yield;Sealing side frame is used to realize the connection of backboard and glass plate, establishes the constant interlayer spacing between backboard and glass plate, ensures that internal encapsulation adhesive film has uniform and consistent compression thickness, eliminates the local stress concentration and delamination from the source of delamination caused by uneven laminated gap.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, specifically to a solar panel assembly structure for photovoltaic power generation. Background Technology

[0002] Photovoltaic power generation, as a core form of clean and renewable energy utilization, has been widely applied in many fields such as centralized photovoltaic power plants, distributed rooftop photovoltaics, and portable outdoor photovoltaic equipment due to its advantages of being green and low-carbon, easy to operate and maintain, and widely applicable. Photovoltaic panels are the core component of photovoltaic power generation systems, used to convert solar energy into electrical energy.

[0003] In existing solar panel manufacturing processes, the core laminate is formed by laminating and curing a glass plate, an upper encapsulating film, a cell array, a lower encapsulating film, and a backsheet. During lamination, although the upper and lower encapsulating films overflowing from the edges can fuse to form an encapsulating edge covering the sidewalls of the laminate, microscopic water seepage channels can easily form at the module edges due to the aging and shrinkage of the encapsulating film material itself, moisture absorption and hydrolysis, or the decline in interfacial adhesion between the encapsulating film and the glass / backsheet over time. In high-humidity outdoor environments, external moisture can penetrate into the module interior along the interfacial gaps between the encapsulating film and the glass or backsheet. This not only induces a potential degradation effect but also further reduces the adhesion between the encapsulating film and the backsheet or glass, leading to severe edge delamination. Furthermore, when assembling the aluminum profile frame of the core laminate, it is usually necessary to first apply fixing adhesive to the groove of the aluminum profile frame. After the adhesive is applied, the side of the battery panel is pressed into the groove of the frame to complete the bonding, fixing and sealing. This assembly process is prone to overflowing adhesive pollution, and the fixing adhesive layer is prone to aging and cracking under long-term thermal shock, which further aggravates the risk of frame sealing failure and moisture intrusion.

[0004] Based on this, this application proposes a solar panel assembly structure for photovoltaic power generation. Summary of the Invention

[0005] This invention provides a photovoltaic panel assembly structure that solves the problems mentioned in the background art. Traditional laminates rely on the initial adhesion between the adhesive film and the glass and backsheet to block moisture. When the adhesive film ages, it is easy to form micro-cracks at the edges, allowing moisture to penetrate and causing cell corrosion and delamination. When using traditional liquid adhesive to bond the aluminum frame to the laminate, it is not only difficult to control the amount of adhesive applied during assembly, which can easily cause adhesive overflow pollution, but the cured adhesive layer is also prone to aging and cracking under long-term outdoor thermal cycling, which increases the risk of moisture intrusion along the sidewalls.

[0006] This invention provides the following technical solution: a photovoltaic power generation panel assembly structure, including a laminated component and a frame. The laminated component includes a back plate, a sealing side frame, and a glass plate. The top of the back plate is sequentially provided with a lower encapsulating film, a battery cell, and an upper encapsulating film from bottom to top. The sealing side frame is sleeved around the battery cell, with its bottom end fitting against the lower end of the back plate. The sealing side frame limits the edge of the upper encapsulating film, causing the edge of the upper encapsulating film to bend downwards until it contacts the top of the lower encapsulating film. The upper and lower encapsulating films are fused together to wrap the battery cell. The upper encapsulating film and the sealing side frame together form a groove. The lower end of the glass plate is located in the groove, and the bottom of the upper end of the glass plate is fitted against the top of the sealing side frame. The inner sidewall, top, and bottom of the sealing side frame are pre-coated with a barrier adhesive. The sealing side frame is connected to the back plate, the glass plate, and the upper encapsulating film through the barrier adhesive. The frame is fitted around the periphery of the laminate. The frame includes a frame body adapted to the laminate. Both ends of the outer side of the inner cavity of the frame are provided with receiving grooves. Spring pieces are provided in the receiving grooves. An extrusion plate is provided in the inner cavity of the frame. When the extrusion plate extrudes the free end of the spring piece, the free end of the spring piece is located on the side of the extrusion plate away from the vertical section of the frame. When the spring piece is in the released state, the free ends of the spring pieces are close to each other, and an overflow cavity is formed between the spring piece and the laminate.

[0007] Preferably, both the back plate and the glass plate are convex structures, the lower cross-sectional area of ​​the back plate is larger than its upper cross-sectional area, the upper cross-sectional area of ​​the glass plate is larger than its lower cross-sectional area, and the upper dimension of the back plate is the same as the lower dimension of the glass plate.

[0008] Preferably, the cross-sectional area of ​​the lower encapsulating film is the same as the cross-sectional area of ​​the upper end of the back plate.

[0009] Preferably, the barrier adhesive blocks moisture, and its moisture blocking performance is greater than that of the lower encapsulating film and the upper encapsulating film, and its melt index during the lamination process matches that of the lower encapsulating film and the upper encapsulating film.

[0010] Preferably, the outer wall of the sealing side frame, the outer wall of the lower end of the back plate, and the outer wall of the glass plate are flush, and a grid flow channel is provided on the outer wall of the sealing side frame.

[0011] Preferably, the extrusion plate is uniformly provided with through holes, and the side of the extrusion plate away from the laminate is uniformly provided with piercing needles. The extrusion plate is connected to the vertical section of the frame through a guide rail.

[0012] Preferably, a glue storage bag is provided on the inner side of the inner cavity of the frame, the glue storage bag stores liquid glue for connecting the frame and the spring piece, and the bag body is punctured by a puncture needle.

[0013] Preferably, the thickness of the laminate is less than the height of the extrusion plate, the inner cavity of the frame is adapted to the thickness of the laminate, and the distance between the two receiving slots near the storage bag is less than the height of the extrusion plate.

[0014] Preferably, the inner sidewall of the frame at the end away from the back panel is arc-shaped and smoothly transitions to the top of the frame.

[0015] Preferably, the dimension of the storage bag along the width of the frame is greater than the distance between the receiving groove and the vertical section of the frame, and when the extrusion plate constrains the free end of the spring sheet, the puncture needle and the storage bag are in a separated state.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This photovoltaic power generation panel assembly structure utilizes a sealed side frame to limit the movement of the solar cells, backsheet, glass plate, and upper and lower encapsulating films, preventing lamination displacement and improving production yield. The sealed side frame connects the backsheet and glass plate, establishing a constant interlayer spacing between them. This ensures that the internal encapsulating films have a uniform compression thickness, eliminating the risk of localized stress concentration and delamination caused by uneven lamination gaps. Furthermore, the barrier adhesive forms a dense bonding interface after lamination, working together with the sealed side frame, the lower end of the backsheet, and the upper end of the glass plate to create a moisture-resistant sealing surface, reducing the risk of moisture intrusion and extending the service life of the laminated components.

[0017] 2. The photovoltaic power generation panel assembly structure uses spring clips to clamp the laminates, improving the reliability of the connection between the laminates and the frame. The spring clips, sealing gaskets, and laminates together form a barrier against moisture, further reducing the risk of moisture intrusion. In addition, a pre-set glue storage bag inside the frame avoids the need to apply fixing glue during the assembly process, thus improving the assembly efficiency of the photovoltaic power generation panel. Attached Figure Description

[0018] Figure 1 This is a front view of a photovoltaic panel assembly structure for power generation proposed in this invention; Figure 2 The structure of this invention Figure 1 Rear view illustration; Figure 3 The structure of this invention Figure 1 Cross-sectional view; Figure 4 The structure of this invention Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic cross-sectional view of the laminated structure of the present invention; Figure 6 The structure of this invention Figure 1 Exploded view of the middle frame.

[0019] In the diagram: 1. Frame; 2. Glass plate; 3. Back plate; 4. Sealing side frame; 5. Barrier adhesive; 6. Glue storage bag; 7. Extrusion plate; 8. Glue overflow cavity; 9. Spring; 10. Guide slide rail; 11. Puncture needle; 12. Battery cell; 13. Upper encapsulation film; 14. Lower encapsulation film; 15. Mesh flow channel. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention provides one embodiment: Please refer to Figures 1-6 A photovoltaic power generation panel assembly structure includes a laminated component and a frame. The laminated component includes a back plate 3, a sealing side frame 4, and a glass plate 2. The back plate 3 has a convex structure, and the cross-sectional area of ​​the lower end of the back plate 3 is larger than the cross-sectional area of ​​its upper end. The top of the back plate 3 is provided with a lower encapsulating film 14, a solar cell 12, and an upper encapsulating film 13 from bottom to top. The cross-sectional area of ​​the lower encapsulating film 14 is the same as the cross-sectional area of ​​the upper end of the back plate 3, and the cross-sectional area of ​​the upper encapsulating film 13 is larger than the cross-sectional area of ​​the upper end of the back plate 3.

[0022] The sealing side frame 4 is fitted around the battery cell 12. During battery assembly, the downward movement of the sealing side frame 4 can squeeze the edge of the upper encapsulation film 13, causing the edge of the upper encapsulation film 13 to bend downward. When the bottom of the sealing side frame 4 is attached to the top of the lower end of the back plate 3, the sealing side frame 4 limits the edge of the upper encapsulation film 13, so that the bottom of the downwardly bent part of the upper encapsulation film 13 contacts the top of the lower encapsulation film 14. Thus, during the lamination process, the upper encapsulation film 13 and the lower encapsulation film 14 can be fused together to wrap the battery cell 12, achieving all-round protection for the battery cell 12, uniformly buffering the force, reducing the risk of microcracks in the battery cell, and strengthening the electrical insulation strength between battery strings.

[0023] The upper encapsulation film 13 and the sealing side frame 4 together form a groove. The glass plate 2 has a convex structure. The cross-sectional area of ​​the upper end of the glass plate 2 is larger than that of the lower end. The upper dimension of the back plate 3 is the same as the lower dimension of the glass plate 2. The lower end of the glass plate 2 is located in the groove. The bottom of the upper end of the glass plate 2 is attached to the top of the sealing side frame 4. In the lamination process, the sealing side frame 4 can limit the back plate 3 and the glass plate 2 to prevent lamination displacement and improve production yield.

[0024] Furthermore, the inner wall, top, and bottom of the sealing side frame 4 are pre-coated with barrier adhesive 5. The sealing side frame 4 is connected to the back plate 3, glass plate 2, and upper encapsulation film 13 through the barrier adhesive 5. The outer wall of the sealing side frame 4, the outer wall at the lower end of the back plate 3, and the outer wall of the glass plate 2 are flush. The barrier adhesive 5 blocks moisture, and its moisture-blocking performance is greater than that of the lower encapsulation film 14 and the upper encapsulation film 13. Moreover, its melt index during the lamination process matches that of the lower encapsulation film 14 and the upper encapsulation film 13, allowing the barrier adhesive 5 to be fused together with the lower encapsulation film 14 and the upper encapsulation film 13. The materials of the barrier adhesive 5, the lower encapsulation film 14, and the upper encapsulation film 13 can be set according to requirements.

[0025] As described above, during the assembly process, the sealing side frame 4 limits the positioning of the battery cell 12, backplate 3, glass plate 2, and upper and lower encapsulating films to prevent lamination displacement and improve production yield. The sealing side frame 4 connects the backplate 3 and the glass plate 2, establishing a constant interlayer spacing between them. This ensures that the internal encapsulating films have a uniform compression thickness, eliminating the risk of local stress concentration and delamination caused by uneven lamination gaps. Furthermore, the barrier adhesive 5 forms a dense bonding interface after lamination, which, together with the sealing side frame 4, the lower end of the backplate 3, and the upper end of the glass plate 2, forms a sealing surface that resists moisture, reducing the risk of moisture intrusion and extending the service life of the laminated components.

[0026] The frame is fitted around the periphery of the laminate. The frame includes a frame 1 that is adapted to the laminate. Both ends of the outer side of the inner cavity of the frame 1 are provided with receiving grooves. Spring pieces 9 are provided in the receiving grooves. The inner cavity of the frame 1 is provided with an extrusion plate 7. When the extrusion plate 7 extrudes the free end of the spring piece 9, the free end of the spring piece 9 is located on the side of the extrusion plate 7 away from the vertical section of the frame 1. When the spring piece 9 is in the released state, under the action of the spring rebound force of the spring piece 9, the free ends of the two spring pieces 9 tend to move closer to each other. The material of the spring piece 9 can be set according to the requirements.

[0027] The thickness of the laminate is less than the height of the extrusion plate 7. The inner cavity of the frame 1 is adapted to the thickness of the laminate. During the assembly of the solar panel, the side wall of the laminate can extrude the extrusion plate 7. Under the action of the extrusion force, the extrusion plate 7 moves and gradually releases the restriction on the spring piece 9. The vertical side wall of the receiving groove away from the laminate can limit the extrusion plate 7, control the insertion depth of the laminate, and ensure the consistency of the solar panel assembly quality. Furthermore, when the receiving groove limits the extrusion plate 7, the extrusion plate 7 releases the restriction on the spring sheet 9, and the spring sheet 9 is in a released state. Under the action of the spring sheet 9's own rebound force, the free end of the spring sheet 9 is in a tight fit with the surface of the laminate. The synergistic action of the two spring sheets 9 achieves clamping of the laminate, improves the reliability of the connection between the laminator and the frame, and the flexible pre-tightening force provided by the spring sheet 9 can dynamically absorb the thermal expansion and contraction difference between the glass plate and the frame, reducing the probability of edge damage to the laminator caused by hard extrusion. In addition, a sealing gasket is set at the free end of the spring sheet 9. The material of the sealing gasket can be set according to the requirements. The sealing gasket is used to seal the gap between the spring sheet 9 and the laminator, further achieving the barrier against water vapor.

[0028] The extrusion plate 7 is uniformly provided with through holes, and the side of the extrusion plate 7 away from the laminate is uniformly provided with piercing needles 11. The extrusion plate 7 is connected to the vertical section of the frame 1 through a guide rail 10. In this embodiment, the guide rail 10 includes a sleeve connected to the extrusion plate 7 and a guide rod connected to the vertical section of the frame 1. The guide rod is movably connected to the inner cavity of the sleeve. The guide rail 10 is used to guide the extrusion plate 7.

[0029] A glue storage bag 6 is provided on the inner side of the inner cavity of the frame 1. The glue storage bag 6 stores liquid glue that connects the frame and the spring piece 9. The material of the liquid glue can be set according to the requirements. When the frame is not assembled, the dimension of the glue storage bag 6 along the width direction of the frame 1 is greater than the distance between the receiving groove and the vertical section of the frame 1. When the extrusion plate 7 constrains the free end of the spring piece 9, the puncture needle 11 and the glue storage bag 6 are separated. The size of the glue storage bag 6 can be set according to the requirements.

[0030] Furthermore, the storage bag 6 can be punctured by the puncture needle 11. When the laminate is inserted into the inner cavity of the frame 1, the laminate can squeeze the extrusion plate 7. The extrusion plate 7 drives the puncture needle 11 to move, and the puncture needle 11 can puncture the storage bag 6. After the bag is punctured, the continued movement of the extrusion plate 7 squeezes the storage bag 6. Under the extrusion force, the glue in the storage bag 6 can be squeezed out. The squeezed glue can contact the side wall of the laminate through the through hole. In addition, a grid flow channel 15 is provided on the outer side wall of the sealing side frame 4. The glue can fill the grid flow channel 15, increasing the glue coverage area and thus improving the reliability of the connection between the laminate and the frame. Furthermore, an overflow cavity 8 is formed between the spring 9 and the laminate. The overflow cavity 8 is used to contain excess glue, reducing the probability of glue leakage and further improving the reliability of the connection between the laminate and the frame.

[0031] The distance between the two receiving slots and the side of the plastic storage bag 6 is less than the height of the extrusion plate 7. The height of the extrusion plate 7 can be set according to requirements. The side of the receiving slots near the plastic storage bag 6 can limit the movement distance of the extrusion plate 7.

[0032] The inner sidewall of the frame 1 away from the back panel 3 is arc-shaped and smoothly transitions to the top of the frame 1, which facilitates the drainage of rainwater along the laminate and reduces the probability of water accumulation on the solar panel.

[0033] In summary: During lamination, the photovoltaic panel assembly structure utilizes the sealing side frame 4 to limit the movement of the solar cells 12, backsheet 3, glass plate 2, and upper and lower encapsulating films, preventing lamination displacement and improving production yield. The barrier adhesive 5 forms a dense bonding interface after lamination, working together with the sealing side frame 4, the lower end of the backsheet 3, and the upper end of the glass plate 2 to create a moisture-resistant sealing surface, reducing the risk of moisture intrusion and extending the service life of the laminated components. During assembly of the laminated components with the frame, the laminated components compress the extrusion plate 7, which... The moving puncture needle 11 can puncture the glue storage bag 6. After the bag is punctured, the continued movement of the extrusion plate 7 extrudes the glue storage bag 6. Under the extrusion force, the glue in the glue storage bag 6 can be squeezed out. The squeezed glue can contact the side wall of the laminate through the through hole. After the glue cures, the laminate is connected to the frame. The outer side wall of the sealing side frame 4 is provided with a grid flow channel 15. The glue can fill into the grid flow channel 15, increasing the glue coverage area and thus improving the reliability of the connection between the laminate and the frame. In addition, an overflow cavity 8 is formed between the spring 9 and the laminate. The overflow cavity 8 is used to contain excess glue, reduce the probability of glue leakage, and further improve the reliability of the connection between the laminate and the frame. The sealing side frame 4 is used to connect the back plate 3 and the glass plate 2, establishing a constant interlayer spacing between the back plate 3 and the glass plate 2. This ensures that the internal encapsulation film has a uniform compression thickness, eliminating the risk of local stress concentration and delamination caused by uneven lamination gaps.

Claims

1. A photovoltaic panel assembly structure for power generation, comprising laminated components and a frame, characterized in that: The laminate includes a back plate (3), a sealing side frame (4), and a glass plate (2). The top of the back plate (3) is sequentially provided with a lower encapsulation film (14), a battery cell (12), and an upper encapsulation film (13) from bottom to top. The sealing side frame (4) is fitted around the battery cell (12), with its bottom edge fitting against the lower end of the back plate (3). The sealing side frame (4) limits the edge of the upper encapsulation film (13), causing the edge of the upper encapsulation film (13) to bend downwards until it contacts the top of the lower encapsulation film (14). The film (13) and the lower encapsulating film (14) are fused together to wrap the battery cell (12); the upper encapsulating film (13) and the sealing side frame (4) together form a groove, the lower end of the glass plate (2) is located in the groove, the bottom of the upper end of the glass plate (2) is attached to the top of the sealing side frame (4), and the inner side wall, top and bottom of the sealing side frame (4) are pre-coated with barrier adhesive (5). The sealing side frame (4) is connected to the back plate (3), the glass plate (2) and the upper encapsulating film (13) through the barrier adhesive (5). The frame is fitted around the periphery of the laminate. The frame includes a frame (1) adapted to the laminate. Both ends of the inner cavity of the frame (1) are provided with receiving grooves. Spring pieces (9) are provided in the receiving grooves. The inner cavity of the frame (1) is provided with an extrusion plate (7). When the extrusion plate (7) extrudes the free end of the spring piece (9), the free end of the spring piece (9) is located on the side of the extrusion plate (7) away from the vertical section of the frame (1). When the spring piece (9) is in the released state, the free ends of the spring pieces (9) are close to each other, and an overflow cavity (8) is formed between the spring piece (9) and the laminate.

2. The photovoltaic panel assembly structure according to claim 1, characterized in that: Both the back plate (3) and the glass plate (2) are convex structures. The cross-sectional area of ​​the lower end of the back plate (3) is greater than that of the upper end, and the cross-sectional area of ​​the upper end of the glass plate (2) is greater than that of the lower end. The upper dimension of the back plate (3) is the same as that of the lower dimension of the glass plate (2).

3. The photovoltaic panel assembly structure according to claim 1, characterized in that: The cross-sectional area of ​​the lower encapsulation film (14) is the same as the cross-sectional area of ​​the upper end of the back plate (3).

4. The photovoltaic panel assembly structure according to claim 1, characterized in that: The barrier adhesive (5) blocks water vapor, and its water vapor blocking performance is greater than that of the lower encapsulation film (14) and the upper encapsulation film (13), and its melting index during the lamination process matches that of the lower encapsulation film (14) and the upper encapsulation film (13).

5. The photovoltaic panel assembly structure according to claim 1, characterized in that: The outer wall of the sealing side frame (4), the outer wall of the lower end of the back plate (3) and the outer wall of the glass plate (2) are flush, and a grid flow channel (15) is provided on the outer wall of the sealing side frame (4).

6. The photovoltaic panel assembly structure according to claim 1, characterized in that: The extrusion plate (7) is uniformly provided with through holes, and the side of the extrusion plate (7) away from the laminate is uniformly provided with puncture needles (11). The extrusion plate (7) is connected to the vertical section of the frame (1) through a guide rail (10).

7. The photovoltaic panel assembly structure according to claim 6, characterized in that: The inner side of the inner cavity of the frame (1) is provided with a glue storage bag (6), which stores liquid glue that connects the frame and the spring piece (9), and the bag body of the glue storage bag (6) is punctured by a puncture needle (11).

8. The photovoltaic panel assembly structure according to claim 7, characterized in that: The thickness of the laminate is less than the height of the extrusion plate (7), the inner cavity of the frame (1) is adapted to the thickness of the laminate, and the distance between the two receiving slots near the storage bag (6) is less than the height of the extrusion plate (7).

9. The photovoltaic panel assembly structure according to claim 1, characterized in that: The inner sidewall of the frame (1) away from the back plate (3) is arc-shaped and smoothly transitions to the top of the frame (1).

10. A photovoltaic panel assembly structure according to claim 7, characterized in that: The size of the storage bag (6) along the width direction of the frame (1) is greater than the distance between the receiving groove and the vertical section of the frame (1), and when the extrusion plate (7) constrains the free end of the spring (9), the puncture needle (11) and the storage bag (6) are in a separated state.

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