Photovoltaic laminate and photovoltaic module

Abstract

The photovoltaic laminated piece comprises a plurality of groups of battery strings, a first cover plate, a second cover plate and a reflective structure, each group of battery strings comprises a plurality of battery pieces, and the plurality of battery pieces are arranged at intervals; the plurality of groups of battery strings are arranged between the first cover plate and the second cover plate; the reflective structure is arranged on one side, adjacent to the battery pieces, of at least one of the first cover plate and the second cover plate, the reflective structure is opposite to a gap between the two adjacent battery pieces and / or the reflective structure is opposite to an outer peripheral area of the multiple groups of battery strings and / or the reflective structure is opposite to a gap between the two adjacent groups of battery strings; the refractive index of the reflective structure is different from the refractive indexes of the first cover plate and the second cover plate. Therefore, the light reflecting structures are arranged in the gaps and the peripheral areas between the battery pieces, and the light reflecting structures can reflect light which is possibly lost originally back to the battery pieces, so that the light can be absorbed by the battery pieces again, the overall light energy absorption efficiency of the photovoltaic laminated piece is improved, and the photoelectric conversion efficiency of the photovoltaic laminated piece is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic components, in particular to a photovoltaic laminate and a photovoltaic component. Background Art

[0002] In the existing technology, the photovoltaic module film technology has a limited increase in power, the glass module has a low utilization rate of light, and the utilization rate of the gaps between the battery cells and the surrounding light is low. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a photovoltaic laminate that improves the light energy absorption efficiency and photoelectric conversion efficiency of the photovoltaic laminate.

[0004] The second object of the present invention is to provide a photovoltaic module, comprising the photovoltaic laminate described in the above embodiment.

[0005] The photovoltaic laminate according to the embodiment of the first aspect of the present invention includes: multiple groups of battery strings, a first cover plate, a second cover plate and a reflective structure, each group of the battery strings includes multiple battery cells, and the multiple battery cells are arranged at intervals; the multiple groups of the battery strings are arranged between the first cover plate and the second cover plate; the reflective structure is arranged on at least one side of the first cover plate and the second cover plate adjacent to the battery cell, the reflective structure is opposite to the gap between two adjacent battery cells and / or the reflective structure is opposite to the outer peripheral area of ​​the multiple groups of the battery strings and / or the reflective structure is opposite to the gap between two adjacent groups of the battery strings, and the refractive index of the reflective structure is different from the refractive index of the first cover plate and the second cover plate.

[0006] According to the photovoltaic laminate of the embodiment of the present invention, by arranging reflective structures in the gaps between the cells and the peripheral areas, the reflective structures can reflect light that might otherwise be lost back to the cells, giving it a chance to be absorbed by the cells again, thereby improving the overall light energy absorption efficiency of the photovoltaic laminate and improving the photoelectric conversion efficiency of the photovoltaic laminate.

[0007] In some embodiments, the refractive index of the reflective structure is greater than the refractive index of the adjacent first cover plate and / or the second cover plate.

[0008] In some embodiments, the reflective structure includes: a support member and an adhesive member, wherein the support member is provided on a side of the cover plate adjacent to the solar cell; and the adhesive member is provided between the support member and the cover plate.

[0009] In some embodiments, the refractive index of the adhesive is K1, the refractive index of the support is K2, and K1 and K2 satisfy: K2>K1.

[0010] In some embodiments, the first cover plate and / or the second cover plate and the adjacent adhesive member define at least one cavity.

[0011] In some embodiments, a groove is formed on the first cover plate and / or the second cover plate, and the adjacent first cover plate and / or the second cover plate and the adjacent adhesive member define the cavity; the groove is a roller groove.

[0012] In some embodiments, the reflective structure further includes: a cavity structure member, the cavity structure member is arranged between the first cover plate and / or the second cover plate and the adjacent adhesive member; the cavity structure member forms a plurality of cavities, and the plurality of cavities are arranged at intervals.

[0013] In some embodiments, the cross-sectional shape of the cavity is polygonal or circular.

[0014] In some embodiments, there are multiple cavities, and the length of the multiple adjacent cavities in the arrangement direction of the multiple battery cells is L1, and the length of the reflective structure along the arrangement direction of the battery cells is L2, and L1 and L2 satisfy: 0<L2-L1≤2mm.

[0015] In some embodiments, the length of the reflective structure along the arrangement direction of the plurality of solar cells is L2, the distance between two adjacent solar cells is L3, and L2 and L3 must satisfy: 0<L2-L3≤2mm.

[0016] In some embodiments, the support member is a transparent member.

[0017] In some embodiments, the adhesive member is an EVA resin layer or an acrylic resin layer.

[0018] In some embodiments, the reflective structure includes: a first reflective structure and a second reflective structure, the first reflective structure is arranged on a side of the first cover plate adjacent to the battery cell and opposite to the gap between the two adjacent battery cells; and / or the second reflective structure is arranged on a side of the second cover plate adjacent to the battery cell and opposite to the gap between the two adjacent battery cells.

[0019] In some embodiments, the first light-reflecting structure and the second light-reflecting structure are opposite to each other along the thickness direction of the solar cell.

[0020] The photovoltaic assembly according to the second embodiment of the present invention includes: a frame and a photovoltaic laminate, wherein the photovoltaic laminate cooperates with the frame and is the photovoltaic laminate according to the first embodiment of the present invention.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a schematic diagram of a photovoltaic laminate according to an embodiment of the present invention;

[0024] Figure 2 is a partial cross-sectional schematic diagram of the gap between battery cells according to an embodiment of the present utility model;

[0025] Figure 3 is a partial cross-sectional schematic diagram of the gap between battery strings according to an embodiment of the present utility model;

[0026] Figure 4 is a schematic diagram showing a reflective structure relative to an outer peripheral area of ​​a battery string according to an embodiment of the present invention;

[0027] Figure 5 is a schematic diagram of a first cover plate and a reflective structure according to an embodiment of the present utility model;

[0028] Figure 6 is a schematic diagram of a first cover plate and a pressure roller according to an embodiment of the present utility model;

[0029] Figure 7 is a schematic diagram of an embodiment of a protrusion structure according to an embodiment of the present utility model;

[0030] Figure 8 is a schematic diagram of another embodiment of the protrusion structure according to an embodiment of the present utility model;

[0031] Figure 9 It is a schematic diagram of the assembly process of the reflective structure and the first cover according to an embodiment of the utility model.

[0032] Reference numerals:

[0033] 100. Photovoltaic laminates;

[0034] 10. Cell; 11. First cover plate; 12. Second cover plate; 13. Reflective structure; 131. First reflective structure; 132. Second reflective structure; 14. Support member; 15. Adhesive member; 16. Cavity; 17. Groove; 18. Press roller; 181. Protrusion structure;

[0035] A. First direction; B. Second direction; C. Third direction. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-9 A photovoltaic laminate 100 according to an embodiment of the present invention is described, comprising: a plurality of cell strings, a first cover plate 11, a second cover plate 12, and a reflective structure 13. The photovoltaic laminate 100 has a first direction A, a second direction B, and a third direction C.

[0037] Specifically, if Figure 1-Figure 5 As shown, each group of battery strings includes multiple battery cells 10, and the multiple battery cells 10 are arranged at intervals; the multiple groups of battery strings are arranged between the first cover plate 11 and the second cover plate 12; the reflective structure 13 is provided on at least one side of the first cover plate 11 and the second cover plate 12 adjacent to the battery cell 10, the reflective structure 13 is opposite to the gap between two adjacent battery cells 10 and / or the reflective structure 13 is opposite to the outer peripheral area of ​​the multiple groups of battery cell strings and / or the reflective structure 13 is opposite to the gap between two adjacent groups of the battery strings, and the refractive index of the reflective structure 13 is different from the refractive index of the first cover plate 11 and the second cover plate 12.

[0038] Combine Figure 1-Figure 5 The plurality of solar cells 10 are evenly spaced along the first direction A and the second direction B of the photovoltaic laminate 100, with a certain gap between two adjacent groups of solar cells and a certain distance between two adjacent groups of solar cells 10. Along the third direction C of the photovoltaic laminate 100, the plurality of solar cells 10 are disposed between the first cover plate 11 and the second cover plate 12. A reflective structure 13 is provided on at least a portion of a surface of one side of the first cover plate 11 and the second cover plate 12 adjacent to the solar cells 10 along the third direction C. The reflective structure 13 is opposite to the gap between two adjacent solar cells 10 along the third direction C, and / or the reflective structure 13 is provided in the outer peripheral edge region of the one side of the first cover plate 11 and the second cover plate 12 adjacent to the solar cells 10 along the third direction C, and is opposite to the outer peripheral edge region of the solar cells 10 located outside the plurality of solar cells. The reflective structure 13 is opposite to the gap between two adjacent solar cells 10. The refractive index of the reflective structure 13 is different from that of the first cover plate 11 and the second cover plate 12 . The reflective structure 13 can reflect light that is not directly absorbed and converted into electrical energy, giving it a chance to be absorbed by the solar cell 10 again.

[0039] According to the photovoltaic laminate 100 of the embodiment of the present invention, by arranging the reflective structure 13 in the gaps between the cells 10 and the peripheral area of ​​the cell string, the reflective structure 13 can reflect the light that may have been lost back to the cell 10, so that it has the opportunity to be absorbed by the cell 10 again, thereby improving the overall light energy absorption efficiency of the photovoltaic laminate 100 and improving the photoelectric conversion efficiency of the photovoltaic laminate 100.

[0040] According to some embodiments of the present invention, Figure 1-Figure 5 As shown, the refractive index of the reflective structure 13 is greater than the refractive index of the adjacent first cover plate 11 and / or second cover plate 12 .

[0041] The third direction C of the photovoltaic laminate 100 coincides with the thickness direction of the cell 10. The reflective structure 13 is spaced from the cell 10 along the thickness direction. Both the first cover plate 11 and the second cover plate 12 are spaced apart from the cell 10. This spacing of the reflective structure 13 from the cell 10 in the thickness direction means that the reflective structure 13 does not directly contact the cell 10, but is instead located within the gap between the cover plates and the cell 10. The refractive index of the reflective structure 13 is greater than that of the first cover plate 11 and / or the second cover plate 12. This difference in refractive index helps light undergo a larger refraction angle upon encountering the reflective structure 13, making it easier to guide light back toward the cell 10. High-refractive-index materials can better control the direction of light, especially when light passes from a low-refractive-index medium into a high-refractive-index medium, resulting in a larger refraction angle. Light that might otherwise penetrate the gaps between the cells 10 or escape from the edges of the cells 10 is instead reflected or refracted back toward the cell 10 surface, increasing the chance of photons being absorbed by the cell 10.

[0042] Therefore, by providing a reflective structure 13 with a higher refractive index in the gaps between the cells 10 and the peripheral area of ​​the cell string, the light energy absorption efficiency of the photovoltaic laminate 100 is effectively improved, which helps to improve the overall working performance of the photovoltaic laminate 100.

[0043] According to some embodiments of the present invention, Figure 2-Figure 5 As shown, the reflective structure 13 includes: a support member 14 and an adhesive member 15. The support member 14 is provided on a side of the cover plate adjacent to the solar cell 10; the adhesive member 15 is provided between the support member 14 and the cover plate.

[0044] The primary function of the support member 14 is to provide structural support, ensuring that the reflective structure 13 is securely fixed to the side of the cover plate adjacent to the solar cell 10. The adhesive 15 is used to secure the support member 14 to the cover plate, ensuring a secure connection between the reflective structure 13 and the cover plate. The adhesive 15 is evenly distributed between the support member 14 and the cover plate, ensuring that the reflective structure 13 will not fall off or shift throughout its service life.

[0045] Thus, the high refractive index of the support member 14, combined with its positional design, effectively manages and guides light, allowing more light to be absorbed by the solar cells 10, thereby improving the light energy conversion efficiency of the photovoltaic module. By combining the support member 14 with the adhesive 15, the reflective structure 13 can remain stable within the photovoltaic laminate 100, making it less susceptible to external factors and ensuring the long-term stable operation of the photovoltaic laminate 100.

[0046] According to some embodiments of the present invention, Figure 2-Figure 5 As shown, the refractive index of the adhesive member 15 is K1, and the refractive index of the support member 14 is K2, and K1 and K2 satisfy: K2>K1.

[0047] The refractive index of the support member 14 is greater than that of the adhesive member 15, which helps ensure that light undergoes greater refraction when entering the support member 14 from the adhesive member 15, thereby being more easily guided back to the cell 10. When light enters from one medium into another, if the refractive index difference between the two media is large, total internal reflection may occur.

[0048] Therefore, limiting the refractive index relationship between the adhesive 15 and the support 14 can ensure the correct propagation of light at the interface of different media. Appropriate refractive index matching can reduce the reflection loss of light at the interface and improve the utilization rate of light energy.

[0049] According to some embodiments of the present invention, Figure 2-Figure 5 As shown, the first cover plate 11 and / or the second cover plate 12 and the adjacent adhesive member 15 define at least one cavity 16 .

[0050] The cavity 16 is located between the first cover plate 11 and / or the second cover plate 12 and the adhesive 15, that is, at least one closed space is formed between the cover plate and the adhesive 15, and the cavity 16 is filled with air. A refractive index difference is formed between the air and the adhesive 15. The existence of the cavity 16 can further optimize the optical path, so that the light undergoes more reflection and refraction before reaching the battery cell 10.

[0051] Therefore, the provision of the cavity 16 can further enhance the reflective effect of the first cover plate 11 and the second cover plate 12 , thereby increasing the absorption rate of light energy by the cell 10 and enhancing the photoelectric conversion efficiency of the photovoltaic laminate 100 .

[0052] According to some embodiments of the present invention, Figure 2-Figure 5 As shown, a groove 17 is formed on the first cover plate 11 and / or the second cover plate 12 , and a cavity 16 is defined between the adjacent first cover plate 11 and / or the second cover plate 12 and the adjacent adhesive member 15 ; the groove 17 is a roller groove.

[0053] The groove 17 is located on the first cover plate 11 and / or the second cover plate 12, that is, the groove 17 is formed only on the first cover plate 11, or the groove 17 is formed only on the second cover plate 12, or the groove 17 is formed on both the first cover plate 11 and the second cover plate 12. The groove 17 is formed by at least part of the surface of one side of the first cover plate 11 and / or the second cover plate 12 adjacent to the solar cell 10 along the third direction C being recessed in a direction away from the solar cell 10. The groove 17 cooperates with the adhesive 15 to define one or more cavities 16. The groove 17 is formed by rolling, and the shape, size and distribution of the groove 17 can be precisely controlled, thereby optimizing the performance of the photovoltaic laminate 100. Combined Figure 6-Figure 8 A plurality of raised structures 181 are formed on the pressing roller 18. The shape of the raised structure 181 is the same as the shape of the groove 17. During the rolling process, the cover plate needs to be heated first, and the pressing roller 18 is placed on the heated cover plate surface. Pressure is applied to the pressing roller 18 to deform the cover plate surface to form the required groove 17.

[0054] Thus, groove 17 can serve as a light guide path, changing the incident angle of light so that more light can be absorbed by cell 10. The design of groove 17 can increase the number of light reflections and improve light energy utilization. The internal structure of groove 17 can further enhance the reflective effect, especially when used in conjunction with support member 14 and adhesive member 15, to better control the light path.

[0055] According to some embodiments of the present invention, Figure 2-Figure 5 As shown, the reflective structure 13 further includes: a cavity 16 structural member, the cavity 16 structural member is arranged between the first cover plate 11 and / or the second cover plate 12 and the adjacent adhesive member 15; the cavity 16 structural member forms a plurality of cavities 16, and the plurality of cavities 16 are arranged at intervals.

[0056] In some embodiments, a mating structure is formed on the first cover plate 11 and / or the second cover plate 12, and a cavity 16 structural member is embedded in the mating structure of the first cover plate 11 and / or the second cover plate 12. A groove 17 is formed on a surface of the cavity 16 structural member adjacent to the battery cell 10, which is suitable for cooperating with the adhesive 15 to define the cavity 16. The cavity 16 extends along the first direction A and is arranged at intervals along the second direction B, or the cavity 16 extends along the second direction B and is arranged at intervals along the first direction A, or the cavity 16 is evenly spaced along the first direction A and the second direction B.

[0057] Therefore, the design of multiple cavities 16 can further optimize the path of light. The presence of the cavity 16 can increase the refractive surface on the first cover plate 11 and / or the second cover plate 12, increase the number of reflections of light in the photovoltaic module, and thus improve the absorption efficiency of light energy.

[0058] According to some embodiments of the present invention, Figure 2-Figure 5 As shown, the cross-sectional shape of the cavity 16 is polygonal or circular.

[0059] A polygonal cross-section provides more reflective surfaces, facilitating multiple reflections of light within cavity 16 and increasing light absorption efficiency. Polygonal cross-sections can be arranged more closely together, reducing gaps and improving space utilization. A circular cross-section provides a more uniform light reflection path, facilitating a more even distribution of light within cavity 16. A circular cross-section promotes even distribution of light in all directions, improving light absorption efficiency.

[0060] Therefore, the design of the cross-sectional shape of the cavity 16 being polygonal or circular can enable the photovoltaic laminate 100 to have a higher light energy absorption efficiency and improve the overall performance of the photovoltaic laminate 100.

[0061] According to some embodiments of the present invention, Figure 2-Figure 5 As shown, there are multiple cavities 16, and the length of the multiple adjacent cavities 16 in the arrangement direction of the multiple battery cells 10 is L1, and the length of the reflective structure 13 along the arrangement direction of the battery cells 10 is L2, and L1 and L2 satisfy: 0<L2-L1≤2mm.

[0062] If L2-L1>2mm, the length of the reflective structure 13 in the arrangement direction of the solar cells 10 is too long, which is not conducive to reducing the production cost of the reflective structure 13. For example, L2-L1=1mm.

[0063] Thus, the relationship between the length of the reflective structure 13 along the arrangement direction of the solar cells 10 and the lengths of the multiple cavities 16 adjacent to each other in the arrangement direction of the multiple solar cells 10 is defined. Even if the length of the reflective structure 13 is slightly longer than the total length of the multiple cavities 16, the reflective structure 13 can cover the multiple cavities 16. Under the premise of ensuring the reflective effect of the reflective structure 13, the production cost of the photovoltaic laminate 100 can be reduced and the overall performance of the photovoltaic laminate 100 can be optimized.

[0064] According to some embodiments of the present invention, Figure 2-Figure 5 As shown, the length of the reflective structure 13 along the arrangement direction of the multiple battery cells 10 is L2, and the distance between two adjacent battery cells 10 is L3. L2 and L3 must satisfy: 0<L2-L3≤2mm.

[0065] The length of the reflective structure 13 is slightly longer than the distance between two adjacent cells 10. If L2 - L3 > 2 mm, the length of the reflective structure 13 in the arrangement direction of the cells 10 is too long, causing the reflective structure 13 to cover the cells 10, which is not conducive to the cell 10's absorption of light. For example, L2 - L3 = 1 mm.

[0066] Therefore, by limiting the length difference range between the length of the reflective structure 13 along the arrangement direction of the battery cells 10 and the distance between two adjacent battery cells 10, it can be ensured that the reflective structure 13 covers the gap between the battery cells 10, so that the light that may originally pass through the gap can be reflected back to the battery cells 10, and at the same time ensure that the reflective structure 13 does not block the light that originally directly hits the battery cells 10, thereby improving the absorption efficiency of light energy and enhancing the photoelectric conversion efficiency of the photovoltaic laminate 100.

[0067] According to some embodiments of the present invention, the support member 14 is a transparent member.

[0068] The support member 14 may be a PET substrate or other transparent support material. PET (polyethylene terephthalate) is a commonly used transparent material with excellent optical properties, mechanical strength, and chemical stability. PET has high transparency, allowing light to pass through smoothly without affecting the light energy absorption of the photovoltaic laminate 100.

[0069] Therefore, the support member 14 is a transparent member with high transparency to ensure that light can pass through smoothly. The transparent support member 14 can help guide light, and through reflection on its surface or inside, the light can be better absorbed by the battery cell 10, thereby improving the light energy absorption efficiency of the photovoltaic laminate 100.

[0070] According to some embodiments of the present invention, the adhesive member 15 is an EVA resin layer or an acrylic resin layer.

[0071] EVA (ethylene-vinyl acetate copolymer) is a transparent thermoplastic resin. EVA has good weather resistance and can be used outdoors for long periods of time without aging. EVA has a certain degree of flexibility, which can adapt to slight deformations of the battery cell 10 and the cover plate during the packaging process, reducing stress concentration. EVA can melt and solidify under heating conditions to form a strong adhesive layer. Acrylic resin has good chemical stability and is not easily affected by environmental factors. Acrylic resin has high mechanical strength and can maintain structural stability under high stress. Acrylic resin has good temperature resistance and can maintain its performance over a wide temperature range. In some embodiments, metal oxide particles or the like can be added to the adhesive 15 to increase its refractive index.

[0072] Therefore, the adhesive 15 being an EVA resin layer or an acrylic resin layer can effectively improve the optical performance, mechanical stability and durability of the adhesive 15 , thereby improving the overall performance of the photovoltaic laminate 100 and extending the service life of the photovoltaic laminate 100 .

[0073] According to some embodiments of the present invention, Figure 3As shown, the reflective structure 13 includes: a first reflective structure 131 and a second reflective structure 132, the first reflective structure 131 is arranged on a side of the first cover plate 11 adjacent to the battery cell 10, and is opposite to the gap between the two adjacent battery cells 10; and / or, the second reflective structure 132 is arranged on a side of the second cover plate 12 adjacent to the battery cell 10, and is opposite to the gap between the two adjacent battery cells 10.

[0074] That is, the first reflective structure 131 is provided only on the first cover plate 11, and the first reflective structure 131 is opposite to the gap between two adjacent battery cells 10 along the third direction C; alternatively, the second reflective structure 132 is provided only on the second cover plate 12, and the second reflective structure 132 is opposite to the gap between two adjacent battery cells 10 along the third direction C; alternatively, the first reflective structure 131 is provided on the first cover plate 11, and the second reflective structure 132 is provided on the second cover plate 12, and both the first reflective structure 131 and the second reflective structure 132 are opposite to the gap between two adjacent battery cells 10.

[0075] Therefore, by arranging a reflective structure 13 on one or both sides of the gap between the cell panels 10 along the third direction C, the light passing through the gap can be effectively reflected back to the cell panels 10, so that more light can be absorbed by the cell panels 10, further optimizing the light management of the photovoltaic laminate 100 and improving the light energy absorption efficiency.

[0076] According to some embodiments of the present invention, Figure 3 As shown, the first light reflecting structure 131 and the second light reflecting structure 132 are opposite to each other along the thickness direction of the solar cell 10 .

[0077] The first and second reflective structures 131, 132 are arranged opposite each other along the third direction C of the photovoltaic laminate 100. The first reflective structure 131 is located on the side of the first cover plate 11 adjacent to the solar cells 10. The first cover plate 11 is the front cover plate of the photovoltaic laminate 100, facing the sun. The first reflective structure 131 reflects light that passes through the gaps between the solar cells 10 back to the solar cells 10, thereby improving the efficiency of light absorption. The second reflective structure 132 is located on the side of the second cover plate 12 adjacent to the solar cells 10. The second cover plate 12 is the back cover plate of the photovoltaic module, facing away from the sun. The second reflective structure 132 further enhances the light reflection effect, ensuring that as much light as possible is absorbed by the solar cells 10.

[0078] Thus, the first reflective structure 131 and the second reflective structure 132 are arranged opposite each other in the thickness direction of the cell 10, thereby forming a double reflection effect. Even if some light is not completely reflected back to the cell 10 after passing through the first reflective structure 131, the second reflective structure 132 can further reflect this light, thereby improving the absorption efficiency of light energy.

[0079] Specifically, combined Figure 9 The reflective structure 13 is guided by a guide wheel to ensure that the reflective structure 13 is accurately aligned on the cover plate, the adhesive 15 is slightly pre-pressed by a press, the adhesive 15 is preheated by a heating device to soften or melt it, and then the adhesive 15 is pre-treated by a light curing device to quickly cure it and bond it to the cover plate.

[0080] The photovoltaic assembly according to the second embodiment of the present invention includes: a frame and a photovoltaic laminate 100. The photovoltaic laminate 100 cooperates with the frame. The photovoltaic laminate 100 is the photovoltaic laminate 100 according to the first embodiment of the present invention.

[0081] According to the photovoltaic module of the embodiment of the present invention, the frame is used to fix and protect the photovoltaic laminate 100, provide structural support, and ensure the overall stability of the photovoltaic module. By applying the photovoltaic laminate 100 in the above embodiment and integrating the reflective structure 13 in the photovoltaic laminate 100, the light management of the photovoltaic module can be optimized and the light energy absorption efficiency of the photovoltaic module can be improved, thereby effectively improving the overall performance of the photovoltaic module.

[0082] 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 to 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0083] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In the description of the present invention, "plurality" means two or more. In the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may also include the first and second features not being in direct contact but being in contact via another feature between them. In the description of the present invention, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0084] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0085] 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 purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A photovoltaic laminate, characterized in that include: Multiple groups of battery strings, each group of the battery strings includes multiple battery cells, and the multiple battery cells are arranged at intervals; a first cover plate and a second cover plate, wherein the plurality of battery strings are arranged between the first cover plate and the second cover plate; A reflective structure, wherein the reflective structure is arranged on a side of at least one of the first cover plate and the second cover plate adjacent to the battery cell, the reflective structure is opposite to the gap between two adjacent battery cells and / or the reflective structure is opposite to the outer peripheral area of ​​multiple groups of battery strings and / or the reflective structure is opposite to the gap between two adjacent groups of battery strings, and the refractive index of the reflective structure is different from the refractive index of the first cover plate and the second cover plate.

2. The photovoltaic laminate according to claim 1, wherein The refractive index of the reflective structure is greater than the refractive index of the first cover plate and / or the second cover plate adjacent thereto.

3. The photovoltaic laminate according to claim 1, wherein The reflective structure comprises: A support member, the support member being provided on a side of the cover plate adjacent to the battery cell; An adhesive member is provided between the support member and the cover plate.

4. The photovoltaic laminate according to claim 3, characterized in that The refractive index of the adhesive member is K1, and the refractive index of the support member is K2, and K1 and K2 satisfy: K2>K1.

5. The photovoltaic laminate according to claim 3, wherein The first cover plate and / or the second cover plate and the adjacent adhesive member define at least one cavity.

6. The photovoltaic laminate according to claim 5, characterized in that A groove is formed on the first cover plate and / or the second cover plate, and the cavity is defined by adjacent first cover plate and / or second cover plate and adjacent adhesive member; The groove is a roller groove.

7. The photovoltaic laminate according to claim 3, characterized in that The reflective structure further comprises: a cavity structure member, the cavity structure member being provided between the first cover plate and / or the second cover plate and the adjacent adhesive member; The cavity structure is formed with a plurality of cavities, and the plurality of cavities are arranged at intervals.

8. The photovoltaic laminate according to claim 5 or 7, characterized in that The cross-sectional shape of the cavity is polygonal or circular.

9. The photovoltaic laminate according to claim 8, characterized in that There are multiple cavities, and the length of the multiple adjacent cavities in the arrangement direction of the multiple battery cells is L1. The length of the reflective structure along the arrangement direction of the battery cells is L2. The L1 and L2 satisfy: 0<L2-L1≤2mm.

10. The photovoltaic laminate according to claim 3, characterized in that The length of the reflective structure along the arrangement direction of the plurality of battery cells is L2, the distance between two adjacent battery cells is L3, and L2 and L3 must satisfy: 0<L2-L3≤2mm.

11. The photovoltaic laminate according to claim 3, wherein The supporting member is a transparent member.

12. The photovoltaic laminate according to claim 3, wherein The adhesive member is an EVA resin layer or an acrylic resin layer.

13. The photovoltaic laminate according to claim 1, wherein The reflective structure comprises: a first reflective structure, the first reflective structure being provided on a side of the first cover plate adjacent to the battery cell and opposite to a gap between two adjacent battery cells; and / or The second light reflecting structure is provided on a side of the second cover plate adjacent to the battery cell and opposite to the gap between two adjacent battery cells.

14. The photovoltaic laminate according to claim 13, wherein The first light-reflecting structure and the second light-reflecting structure are opposite to each other along the thickness direction of the cell.

15. A photovoltaic module, characterized in that: include: frame; A photovoltaic laminate, wherein the photovoltaic laminate cooperates with the frame, and the photovoltaic laminate is the photovoltaic laminate according to any one of claims 1-14.

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