Adhesive film for photovoltaic laminated piece, photovoltaic laminated piece and photovoltaic module

Abstract

The utility model discloses an adhesive film used for a photovoltaic laminated member, the photovoltaic laminated member and a photovoltaic assembly, the adhesive film used for the photovoltaic laminated member comprises a first connecting part and a second connecting part, the first connecting part is arranged at two sides of the second connecting part along a first direction, and the adhesive film gram weight of the first connecting part is greater than the adhesive film gram weight of the second connecting part. Therefore, by arranging the first connecting part with large gram weight and thickening the edge of the adhesive film, manual adhesive film strip laying can be avoided, the adhesive film production process is optimized, the adhesive film production efficiency and quality stability are improved, the adhesive film is only locally thickened, the adhesive film consumption is reduced, and the production cost is saved; and meanwhile, the problems of edge layering, bubbles and the like after the photovoltaic laminated piece is laminated can be prevented, and the structural reliability of the photovoltaic laminated piece is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to an adhesive film for photovoltaic laminates, a photovoltaic laminate and a photovoltaic assembly. Background Art

[0002] In the prior art, during the lamination process of photovoltaic modules, the edges around the photovoltaic modules, especially the short edges, are subjected to the stress of the silicone plate during the lamination process, and the edge film is squeezed out. After lamination, the edge of the film becomes thinner and causes certain stress, which is particularly obvious in double-glass modules. During the long-term use of photovoltaic modules, under the action of stress, problems such as delamination of the edges of photovoltaic modules and the generation of bubbles will occur. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the first purpose of the utility model is to provide an adhesive film for photovoltaic laminates, which can reduce the amount of adhesive film used and improve the structural reliability of photovoltaic laminates.

[0004] The second objective of the present invention is to provide a photovoltaic laminate, comprising the adhesive film for photovoltaic laminate described in the above embodiment.

[0005] The third objective of the present invention is to provide a photovoltaic module, comprising the photovoltaic laminate described in the above embodiment.

[0006] According to the first aspect of the utility model, the adhesive film for photovoltaic laminates includes: a first connecting part and a second connecting part, the first connecting part is arranged on both sides of the second connecting part along the first direction, and the gram weight of the adhesive film of the first connecting part is greater than the gram weight of the adhesive film of the second connecting part.

[0007] According to the adhesive film used for photovoltaic laminates in the embodiment of the utility model, by setting a first connecting portion with a larger gram weight and thickening the edge of the adhesive film, it is possible to avoid manual laying of adhesive film strips, optimize the adhesive film production process, improve the production efficiency and quality stability of the adhesive film, and only thicken the adhesive film locally to reduce the amount of adhesive film used, saving production costs. At the same time, it can prevent problems such as edge delamination and bubbles in the photovoltaic laminates after lamination, thereby improving the structural reliability of the photovoltaic laminates.

[0008] In some embodiments, the weight of the adhesive film of the first connecting portion is G1, and the weight of the adhesive film of the second connecting portion is G2, and G1 and G2 satisfy: 20g / m 2 ≤G1-G2≤300g / m 2 .

[0009] In some embodiments, patterns are formed on both the first connecting portion and the second connecting portion, and the pattern depths of the first connecting portion and the second connecting portion are different.

[0010] In some embodiments, the pattern includes: a first pattern and a second pattern, the first pattern is arranged on the first connecting portion, the depth of the first pattern is H1, the second pattern is arranged on the second connecting portion, the depth of the second pattern is H2, and H1 and H2 satisfy: 10um≤H1≤400um, 10um≤H2≤400um.

[0011] In some embodiments, H1 and H2 satisfy: 30um≤H1-H2≤350um.

[0012] In some embodiments, the pattern is a diamond shape or a tic-tac-toe shape.

[0013] In some embodiments, it further includes: a third connection portion, the third connection portion extends along a second direction, the third connection portion is arranged in the middle of the second connection portion, and the second direction is perpendicular to the first direction.

[0014] In some embodiments, the width of the first connecting portion is L, and L satisfies: 5mm≤L≤200mm.

[0015] The photovoltaic laminate according to the second aspect of the utility model comprises: an adhesive film, a photovoltaic cell layer and at least one bus bar, wherein the adhesive film is the adhesive film for the photovoltaic laminate according to the first aspect of the utility model, the second connection portion of the adhesive film is opposite to the photovoltaic cell layer along the thickness direction of the adhesive film, the bus bar is arranged in the middle of the photovoltaic cell layer, and the third connection portion of the adhesive film is opposite to the bus bar along the thickness direction of the adhesive film.

[0016] The photovoltaic assembly according to the third aspect of the present invention comprises the adhesive film for the photovoltaic laminate according to the first aspect of the present invention or the photovoltaic laminate according to the second aspect of the present invention.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a schematic diagram of an adhesive film for photovoltaic laminate according to an embodiment of the utility model.

[0020] Figure 2 Schematic diagram of a photovoltaic laminate according to an embodiment of the utility model.

[0021] Figure 3 yes Figure 2 Schematic diagram of the enlarged P region.

[0022] Figure 4 It is a schematic diagram of an adhesive film for photovoltaic laminate according to another embodiment of the utility model.

[0023] Figure 5 Schematic diagram of a photovoltaic laminate according to another embodiment of the present invention.

[0024] Figure 6 yes Figure 5 Schematic enlargement of the mid-Q region.

[0025] Reference numerals:

[0026] 100. Photovoltaic laminates;

[0027] 10. Adhesive film; 11. First connecting portion; 12. Second connecting portion; 13. Third connecting portion;

[0028] 20. Photovoltaic cell layer; 21. Bus bar;

[0029] A, first direction; B, second direction; C, thickness direction. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 6 The adhesive film 10 for a photovoltaic laminate 100 according to an embodiment of the present invention is described, comprising: a first connection portion 11 and a second connection portion 12. The adhesive film 10 has a first direction A, a second direction B and a thickness direction C.

[0031] Specifically, if Figure 1-Figure 6 As shown, the first connection part 11 is disposed on both sides of the second connection part 12 along the first direction A, and the weight of the adhesive film 10 of the first connection part 11 is greater than that of the adhesive film 10 of the second connection part 12 .

[0032] Combination Figure 1-Figure 3The first connection part 11 extends along the second direction B. There may be two first connection parts 11. The two first connection parts 11 are respectively arranged on both sides of the second connection part 12 along the first direction A. The gram weight of the adhesive film 10 of the first connection part 11 is greater than the gram weight of the adhesive film 10 of the second connection part 12, that is, the thickness of the adhesive film 10 of the first connection part 11 is thicker than the thickness of the adhesive film 10 of the second connection part 12, that is, the thickness of the adhesive film 10 in the middle area along the first direction A used for the photovoltaic laminate 100 is thinner than the thickness of the adhesive film 10 at the edges on both sides along the first direction A.

[0033] The adhesive film 10 used for the photovoltaic laminate 100 is subjected to pressure during the lamination process. The adhesive film 10 at the edge of the photovoltaic laminate 100 is easily squeezed out under pressure, resulting in thinning of the edge of the adhesive film 10 in the photovoltaic laminate 100. The first connecting part 11 with a larger gram weight is located on both sides of the second connecting part 12 with a smaller gram weight to thicken the edge of the adhesive film 10, so that the thickness of the adhesive film 10 after lamination is uniform, avoiding the phenomenon of thinning of the edge of the adhesive film 10 after lamination.

[0034] According to the adhesive film 10 used for the photovoltaic laminate 100 in the embodiment of the utility model, by setting a first connecting portion 11 with a larger gram weight and thickening the edge of the adhesive film 10, it is possible to avoid manual laying of the adhesive film 10 strips, optimize the production process of the adhesive film 10, improve the production efficiency and quality stability of the adhesive film 10, and only thicken the adhesive film 10 locally to reduce the amount of the adhesive film 10 used, saving production costs. At the same time, it can prevent the photovoltaic laminate 100 from having problems such as edge delamination and bubbles after lamination, thereby improving the structural reliability of the photovoltaic laminate 100.

[0035] According to some embodiments of the present invention, the weight of the adhesive film 10 of the first connecting portion 11 is G1, and the weight of the adhesive film 10 of the second connecting portion 12 is G2, and G1 and G2 satisfy: 20g / m 2 ≤G1-G2≤300g / m 2 .

[0036] If the relationship between the weight of the adhesive film 10g of the first connecting portion 11 and the weight of the adhesive film 10g of the second connecting portion 12 is: G1-G2<20g / m 2 , the weight of the adhesive film 10 of the first connection part 11 is small, and the edge of the adhesive film 10 is likely to be thin after lamination of the photovoltaic laminate 100, resulting in edge delamination of the photovoltaic laminate 100. If the relationship between the weight of the adhesive film 10 of the first connection part 11 and the weight of the adhesive film 10 of the second connection part 12 is G1-G2>20g / m 2 , the weight of the adhesive film 10 of the first connecting portion 11 is relatively large, which may easily lead to an excessively thick edge of the adhesive film 10, an increase in the amount of adhesive film 10 used, and a waste of resources. For example, G1-G2=200g / m 2 .

[0037] Therefore, limiting the relationship between the gram weight of the adhesive film 10 of the first connecting part 11 and the gram weight of the adhesive film 10 of the second connecting part 12 is conducive to achieving the thickening of the edge of the adhesive film 10, ensuring the reliability of the adhesive film 10, while reducing the usage of the adhesive film 10, reducing production costs, and ensuring the reliability of the photovoltaic laminate 100 after lamination.

[0038] According to some embodiments of the present invention, patterns are formed on both the first connection portion 11 and the second connection portion 12 , and the pattern depths of the first connection portion 11 and the second connection portion 12 are different.

[0039] The patterns of the first connecting portion 11 and the second connecting portion 12 are convex upward or concave downward along the thickness direction C of the adhesive film 10, and the patterns of the first connecting portion 11 and the second connecting portion 12 have different depths in the thickness direction C of the adhesive film 10, that is, there is a gap between the adhesive film 10 and other components in the photovoltaic laminate 100, which reserves a certain space for the displacement of the adhesive film 10 during lamination of the photovoltaic laminate 100, effectively controls the displacement of the adhesive film 10 during lamination, and reduces the production cost of the adhesive film 10.

[0040] Therefore, patterns are formed on the first connecting part 11 and the second connecting part 12, which can increase the friction coefficient of the surface of the adhesive film 10 when the adhesive film 10 is connected to other components in the photovoltaic laminate 100, thereby increasing the adhesion between the adhesive film 10 and other components, avoiding slipping between the adhesive film 10 and the photovoltaic laminate 100, and preventing the photovoltaic laminate 100 from positional displacement during the laying and lamination process.

[0041] According to some embodiments of the present invention, the patterns include: a first pattern and a second pattern, the first pattern is arranged on the first connecting portion 11, the depth of the first pattern is H1, the second pattern is arranged on the second connecting portion 12, the depth of the second pattern is H2, H1 and H2 satisfy: 10um≤H1≤400um, 10um≤H2≤400um.

[0042] If the depth of the first pattern and the second pattern is less than 10um, the depth of the first pattern and the second pattern is small, resulting in a small volume of the concave space formed on the first connecting portion 11 and the second connecting portion 12, which is not conducive to the flow of the adhesive film 10 during lamination, resulting in a large amount of overflow from the edge of the adhesive film 10 to form waste. If the depth of the first pattern and the second pattern is greater than 400um, the depth of the first pattern and the second pattern is too large, resulting in a large concave space formed on the first connecting portion 11 and the second connecting portion 12, resulting in a large number of gaps inside the adhesive film 10 after lamination, which is not conducive to the uniform distribution of the adhesive film 10.

[0043] Therefore, limiting the depth of the first pattern and the second pattern can not only leave enough space for the adhesive film 10 to shift during lamination, but also ensure that the adhesive film 10 is evenly distributed inside the photovoltaic laminate 100 after lamination, thereby ensuring the structural stability of the photovoltaic laminate 100.

[0044] According to some embodiments of the present invention, H1 and H2 satisfy: 30um≤H1-H2≤350um.

[0045] That is, the depth of the first pattern on the first connection part 11 is greater than the depth of the second pattern on the second connection part 12, and the first connection part 11 is located at the edge of the adhesive film 10. If the relationship between the depth of the first pattern and the depth of the second pattern is H1-H2<30um, the depth difference between the first pattern and the second pattern is small, and the space reserved at the first pattern is small. During lamination, the pressure on the first connection part 11 is large, and the displacement of the adhesive film 10 at the first connection part 11 is large. A large amount of adhesive film 10 overflows from the first connection part 11, which easily causes a waste of resources. If the relationship between the depth of the first pattern and the depth of the second pattern is H1-H2>350um, the depth difference between the first pattern and the second pattern is large, resulting in a large space reserved at the first connection part 11. The adhesive film 10 that is displaced after lamination of the photovoltaic laminate 100 is not enough to fill the gap, affecting the structural strength at the edge of the photovoltaic laminate 100.

[0046] Therefore, limiting the relationship between the depth of the first pattern and the depth of the second pattern can leave enough space for the displacement of the adhesive film 10 during lamination, ensure the uniformity of the thickness of the adhesive film 10 after displacement, avoid excessive overflow of the adhesive film 10 and cause waste, and at the same time ensure the structural stability and reliability of the photovoltaic laminate 100.

[0047] According to some embodiments of the present invention, the pattern is in a diamond shape or a tic-tac-toe shape.

[0048] That is, the adhesive film 10 at the edge of the diamond or tic-tac-toe pattern is thicker, and the adhesive film 10 at the middle of the diamond and the middle of the tic-tac-toe pattern is thinner, so that the adhesive film 10 can be displaced to a certain extent during lamination, and the diamond or tic-tac-toe pattern is evenly distributed on the surface of the first connecting portion 11 and the second connecting portion 12. Therefore, the arrangement of the diamond or tic-tac-toe pattern is conducive to improving the reliability of the adhesive film 10 and ensuring that the adhesive film 10 is evenly distributed in the photovoltaic laminate 100 after lamination.

[0049] According to some embodiments of the present invention, Figure 4-Figure 6As shown, it also includes: a third connection part 13, the third connection part 13 extends along the second direction B, and the third connection part 13 is arranged in the middle of the second connection part 12, and the second direction B is perpendicular to the first direction A. The third connection part 13 is arranged in the middle of the two first connection parts 11 along the first direction A and is located in the middle of the second connection part 12. Therefore, the third connection part 13 is arranged to thicken the middle part of the second connection part 12. Thickening the middle part of the adhesive film 10 can improve the glue overflow problem in the middle part of the second connection part 12 during the lamination process, while ensuring the overall thickness of the adhesive film 10, reducing the amount of the adhesive film 10, reducing the production cost of the adhesive film 10 used for the laminate, and improving the reliability of the adhesive film 10.

[0050] According to some embodiments of the present invention, Figure 1 As shown, the width of the first connection portion 11 is L, and L satisfies: 5mm≤L≤200mm. If the width L of the first connection portion 11 is less than 5mm, the width of the first connection portion 11 is too narrow, resulting in that the content of the adhesive film 10 at the edge of the adhesive film 10 is still relatively small, and the edge will still be thin after lamination. If the width L of the first connection portion 11 is greater than 200mm, the width of the first connection portion 11 is too wide, which is not conducive to reducing the amount of adhesive film 10 used and saving the production cost of the adhesive film 10. For example, L=150mm. Therefore, limiting the width of the first connection portion 11 can reduce the amount of adhesive film 10 used, save the production cost of the adhesive film 10, and improve the quality stability of the adhesive film 10 while ensuring the reliability of the adhesive film 10.

[0051] According to the photovoltaic laminate 100 in the embodiment of the second aspect of the utility model, Figure 5 and Figure 6 As shown, it includes: an adhesive film 10, a photovoltaic cell layer 20 and at least one bus bar 21. The adhesive film 10 is the adhesive film 10 used for the photovoltaic laminate 100 in the above embodiment. The second connecting portion 12 of the adhesive film 10 is opposite to the photovoltaic cell layer 20 along the thickness direction C of the adhesive film 10, the bus bar 21 is arranged in the middle of the photovoltaic cell layer 20, and the third connecting portion 13 of the adhesive film 10 is opposite to the bus bar 21 along the thickness direction C of the adhesive film 10.

[0052] The busbar 21 is suitable for connecting with the photovoltaic cell layer 20 to serve as a transmission carrier for the current generated by the photovoltaic cell layer 20. The adhesive film 10 is suitable for being opposite to the photovoltaic cell layer 20 and the busbar 21 along the thickness direction C. The adhesive film 10 used for the photovoltaic laminate 100 is arranged on at least one side of the photovoltaic cell layer 20 and the busbar 21 along the thickness direction C, that is, one side surface of the adhesive film 10 along the thickness direction C is suitable for contacting with one side surface of the photovoltaic cell sheet and the busbar 21.

[0053] According to the photovoltaic laminate 100 of the embodiment of the utility model, the adhesive film 10 is opposite to the photovoltaic cell layer 20 and the bus bar 21 along the thickness direction C, and the adhesive film 10 can protect the photovoltaic cell layer 20 and the bus bar 21. The third connecting portion 13 is opposite to the bus bar 21 along the thickness direction C of the adhesive film 10, which is beneficial to enhancing the protection of the bus bar 21. The pattern provided on the adhesive film 10 is beneficial to improving the connection strength between the adhesive film 10 and the photovoltaic cell layer 20 and the bus bar 21, thereby improving the overall structural strength and structural stability of the photovoltaic laminate 100.

[0054] The photovoltaic assembly in the embodiment according to the third aspect of the utility model comprises the adhesive film 10 for the photovoltaic laminate 100 or the photovoltaic laminate 100 in the above embodiment.

[0055] According to the photovoltaic module of the embodiment of the utility model, by using the adhesive film 10 or the photovoltaic laminate 100 described in the above embodiment, the uniformity of the adhesive film 10 inside the photovoltaic module can be improved, the structural strength of the photovoltaic module can be ensured, the production cost of the photovoltaic module can be reduced, the production efficiency of the photovoltaic module can be improved, and the service life of the photovoltaic module can be extended.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0057] In the description of the present utility model, "first feature" and "second feature" may include one or more of the features. In the description of the present utility model, "plurality" means two or more. In the description of the present utility model, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. In the description of the present utility model, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An adhesive film for photovoltaic laminates, characterized in that: include: a first connecting portion; The second connecting part, the first connecting part is arranged on both sides of the second connecting part along the first direction, and the grammage of the adhesive film of the first connecting part is greater than the grammage of the adhesive film of the second connecting part.

2. The adhesive film for photovoltaic laminate according to claim 1, characterized in that: The weight of the adhesive film of the first connecting part is G1, and the weight of the adhesive film of the second connecting part is G2, and G1 and G2 satisfy: 20g / m 2 ≤G1-G2≤300g / m 2 .

3. The adhesive film for photovoltaic laminate according to claim 1, characterized in that: Patterns are formed on the first connection portion and the second connection portion, and the pattern depths of the first connection portion and the second connection portion are different.

4. The adhesive film for photovoltaic laminate according to claim 3, characterized in that: The patterns include: a first pattern, wherein the first pattern is provided on the first connecting portion, and the depth of the first pattern is H1; The second pattern is provided on the second connecting portion, the depth of the second pattern is H2, and the depths H1 and H2 satisfy: 10um≤H1≤400um, 10um≤H2≤400um.

5. The adhesive film for photovoltaic laminate according to claim 4, characterized in that: The H1 and H2 satisfy: 30um≤H1-H2≤350um.

6. The adhesive film for photovoltaic laminate according to claim 3, characterized in that: The pattern is in the shape of a diamond or a tic-tac-toe.

7. The adhesive film for photovoltaic laminate according to claim 1, characterized in that: Also includes: The third connection portion extends along a second direction and is disposed in the middle of the second connection portion, and the second direction is perpendicular to the first direction.

8. The adhesive film for photovoltaic laminate according to any one of claims 1 to 7, characterized in that: The width of the first connecting portion is L, and L satisfies: 5mm≤L≤200mm.

9. A photovoltaic laminate, characterized in that: include: An adhesive film, wherein the adhesive film is the adhesive film for photovoltaic laminates according to any one of claims 1 to 8; A photovoltaic cell layer, wherein the second connection portion of the adhesive film is opposite to the photovoltaic cell layer along the thickness direction of the adhesive film; At least one bus bar is provided in the middle of the photovoltaic cell layer, and the third connecting portion of the adhesive film is opposite to the bus bar along the thickness direction of the adhesive film.

10. A photovoltaic module, characterized in that: The invention comprises the adhesive film for photovoltaic laminate according to any one of claims 1 to 8 or the photovoltaic laminate according to claim 9.

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