Photovoltaic module and preparation method thereof

Abstract

The invention provides a photovoltaic module and a preparation method thereof, the photovoltaic module comprises a front plate and a packaging panel, a battery string, an adhesive film and a high-water-resistance adhesive tape are arranged between the front plate and the packaging panel, a gap is arranged between the adhesive film and each side edge of the front plate or the packaging panel, the adhesive film covers the upper surface and the lower surface of the battery string, and the high-water-resistance adhesive tape is arranged between the front plate and the packaging panel. The high-water-resistance adhesive tape is attached between the adhesive film and the gap, and the adhesive film and the high-water-resistance adhesive tape are both made of organic polymer materials, so that the adhesive film and the high-water-resistance adhesive tape can be fused with each other, the fused materials can increase the thickness of the material at the edge of the front plate, the adhesive film can be prevented from being delaminated, and the waterproof effect of edge sealing is further improved; therefore, the reliability and the service life of the photovoltaic module are improved.

Description

Technical Field

[0001] The present invention mainly relates to the field of photovoltaic technology, and in particular to a method for preparing a photovoltaic module and a photovoltaic module. Background Art

[0002] At present, photovoltaic modules usually sandwich the battery string between the front plate and the back plate, bond them with POE or other adhesive films, and apply butyl adhesive to the edges of the front plate and the back plate to achieve edge sealing to prevent water vapor from penetrating into the module. However, due to the large difference in material properties between butyl adhesive and adhesive film, the butyl adhesive at the edge of the module is easily squeezed out by the adhesive film during the process of fully bonding the front plate and the back plate, and the effective waterproof distance of the butyl adhesive becomes smaller, thereby reducing the waterproof effect of the edge seal, affecting the reliability and life of the photovoltaic module. Summary of the invention

[0003] The object of the present invention is to provide a photovoltaic module and a method for preparing the photovoltaic module, which are used to improve the waterproof effect of edge sealing, thereby improving the reliability and life of the photovoltaic module.

[0004] To achieve the above-mentioned objectives, in the first aspect, the present application provides a photovoltaic module, comprising: a front plate; a packaging panel; a battery string and an adhesive film located between the front plate and the packaging panel, a gap being provided between the adhesive film and each side edge of the front plate or the packaging panel, the adhesive film covering the upper and lower surfaces of the battery string; a high-resistance water-resistance adhesive strip located between the front plate and the packaging panel, the high-resistance water-resistance adhesive strip being adhered between the adhesive film and the gap, and the adhesive film and the high-resistance water-resistance adhesive strip both being made of organic polymer materials.

[0005] In some embodiments, the high water-resistance adhesive strip is thermoplastic POE, and the adhesive film is EVA or EPE or POE.

[0006] In some embodiments, a bus bar is further included, and the bus bar is arranged along the short side direction of the battery string.

[0007] In some embodiments, the high-resistance water-resistant adhesive strip covers the upper and lower surfaces of the bus bar.

[0008] In some embodiments, the high-resistance water-resistant adhesive strip covers the upper surface of the bus bar, and the adhesive film includes an upper adhesive film and a lower adhesive film that are arranged opposite to each other, and the lower adhesive film covers the lower surface of the bus bar.

[0009] In some embodiments, the distance from the outer end of the adhesive film to the edge of the front plate is greater than 10 mm.

[0010] In some embodiments, the front plate is glass and the encapsulation panel is glass.

[0011] In a second aspect, the present application provides a method for preparing a photovoltaic module, which is used to manufacture the photovoltaic module as described in the first aspect above, including: providing a front panel; providing a packaging panel; arranging a battery string and an adhesive film on the front panel or the packaging panel, so that a gap is provided between the adhesive film and each side edge of the corresponding panel, and the adhesive film covers the upper and lower surfaces of the battery string; arranging a high-resistance water-resistance adhesive strip on the front panel or the packaging panel, and the adhesive film and the high-resistance water-resistance adhesive strip are both made of organic polymer materials; the front panel and the packaging panel are treated by heating and laminating so that the high-resistance water-resistance adhesive strip is adhered between the adhesive film and the gap.

[0012] In some embodiments, the high water-resistance adhesive strip is thermoplastic POE, and the adhesive film is EVA or EPE or POE.

[0013] In some embodiments, after the battery string and the adhesive film are arranged on the front plate, the method further includes: arranging a bus bar on the front plate along the short side direction of the battery string; and making the adhesive film cover the upper and lower surfaces of the bus bar.

[0014] In some embodiments, along the short side direction of the packaging panel, the length of the inner end of the short side of the high-resistance water-resistant adhesive strip exceeding the outer end of the short side of the adhesive film ranges from 2 mm to 5 mm.

[0015] In some embodiments, along the long side direction of the packaging panel, the length of the inner end of the short side of the high-resistance water-resistance rubber strip exceeding the outer end of the short side of the adhesive film is in the range of 0mm-3mm; or, along the long side direction of the packaging panel, the inner end of the short side of the high-resistance water-resistance rubber strip does not exceed the outer end of the short side of the adhesive film, wherein the length between the inner end of the short side of the high-resistance water-resistance rubber strip and the outer end of the short side of the adhesive film is in the range of 0mm-2mm.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The present application provides a photovoltaic module, including a front plate and a packaging panel, wherein a battery string, an adhesive film and a high-water-resistance adhesive strip are arranged between the front plate and the packaging panel, a gap is provided between the adhesive film and each side edge of the front plate or the packaging panel, the adhesive film covers the upper and lower surfaces of the battery string, and the high-water-resistance adhesive strip is adhered between the adhesive film and the gap, and since the adhesive film and the high-water-resistance adhesive strip are both made of organic polymer materials, the two can be fused with each other, and the fused material can increase the material thickness of the edge of the front plate, can avoid delamination of the adhesive film, and thereby enhance the waterproof effect of the edge seal, thereby improving the reliability and life of the photovoltaic module.

[0018] The present application also provides a method for preparing a photovoltaic module, by providing a front plate and a packaging panel, so that the front plate or the packaging panel is provided with a film on the upper and lower surfaces of the battery string, and a high-resistance water-resistance adhesive strip is provided on the front plate or the packaging panel, and then the high-resistance water-resistance adhesive strip is adhered between the film and the gap by heating and laminating. Since the film and the high-resistance water-resistance adhesive strip are both made of organic polymer materials, they can be fused with each other after lamination. The fused material can increase the material thickness of the edge of the front plate, can avoid delamination of the film, and further improve the waterproof effect of the edge sealing, thereby improving the reliability and life of the prepared photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the present application. They are included and constitute a part of the present application. The accompanying drawings illustrate embodiments of the present application and together with the present specification serve to explain the principles of the present application. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of an existing component using butyl rubber provided by the present application;

[0021] Figure 2 It is a flow chart of a method for preparing a photovoltaic module provided in the present application;

[0022] Figure 3 This is a process disassembly diagram of a method for preparing a photovoltaic module provided in the present application;

[0023] Figure 4 This is a schematic diagram of a structure in which a high-resistance water-resistant adhesive strip is pressed onto a packaging panel in step S23 provided in the present application;

[0024] Figure 5 is a schematic structural diagram of a photovoltaic module in step S31 provided in the present application;

[0025] Figure 6 This is one of the structural schematic diagrams of the photovoltaic module before heating and lamination in step S32 provided in the present application;

[0026] Figure 7 This is the second structural schematic diagram of the photovoltaic module before heating and lamination in step S32 provided by the present application;

[0027] Figure 8 This is a schematic diagram of the structural changes of a photovoltaic module during heating and lamination in step S32 provided in the present application;

[0028] Fig. 9 is a side view of a photovoltaic assembly 1000 provided in the present application;

[0029] Fig.10 It is a cross-sectional view corresponding to a first structural representation that may appear in a photovoltaic assembly 1000 provided in the present application;

[0030] Fig.11 is a cross-sectional view corresponding to a second structural representation that may appear in a photovoltaic assembly 1000 provided in the present application;

[0031] Fig.12 It is a cross-sectional view corresponding to a third structural representation that may appear in a photovoltaic assembly 1000 provided in the present application;

[0032] Fig.13 It is a partial top view of a photovoltaic assembly 1000 provided in the present application. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0034] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0035] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0036] The terms and abbreviations used in this application are explained as follows:

[0037] EVA (Ethylene Vinyl Acetate) is mainly made of copolymerization of ethylene and vinyl acetate.

[0038] EPE (Expanded Polyethylene, polyethylene foam) is mainly made of physical foaming of low-density polyethylene resin.

[0039] POE (Polyolefin Elastomer) is mainly produced by the polymerization of ethylene and α-olefins (such as 1-butene, 1-hexene, 1-octene, etc.) through metallocene catalysis.

[0040] Thermoplastic POE: A thermoplastic elastomer material made mainly of POE resin or copolymer. The density of thermoplastic POE ranges from 0.863-0.915 g / cm 3 The flexural modulus is between 1200-4000, and the 100% modulus is between 150-750. It has a good balance of rigidity and toughness, good adhesion to glass, can form a strong bonding interface, and enhance the waterproof effect of the edge of the component; thermoplastic POE also has excellent weather resistance and can resist ultraviolet rays, temperature changes and chemical erosion, ensuring that the edge of the component maintains waterproof performance in long-term outdoor environments.

[0041] Thermoplastic POE, EVA, EPE and POE are all organic polymer materials.

[0042] At present, butyl rubber is usually applied to the edges of the front and back panels to achieve edge sealing. Butyl rubber is a synthetic rubber, mainly copolymerized by isobutylene and a small amount of isoprene. Its molecular structure is characterized by long-chain isobutylene units and a small amount of isoprene units alternately connected to form a highly saturated linear structure. Conventional adhesive films use EVA, EPE, POE, etc., which have quite different material properties from butyl rubber. During heating and lamination, the adhesive film is easy to penetrate from the edge of the butyl rubber, causing the butyl rubber to lose its waterproof effect.

[0043] refer to Figure 1 , which is a schematic diagram of an existing component using butyl rubber. The existing component includes an existing front plate 101, an existing packaging panel 102, an existing adhesive film 103, an existing battery string 104, an existing bus bar 105 and butyl rubber 106. Before heating and laminating, the length of the butyl rubber 106 along the long side direction (x direction) is d2, and the length of the gap reserved between the butyl rubber 106 and the existing adhesive film 103 is X1.

[0044] After heating and lamination, due to the large difference in material properties between the existing adhesive film 103 and the butyl rubber 106, the existing adhesive film 103 cannot be fused with the butyl rubber 106, and the existing adhesive film 103 will squeeze into the butyl rubber 106, making the effective waterproof distance D2 between the butyl rubber 106 and the edge smaller, and the waterproof performance worse. The length of the outer end of the existing adhesive film 103 from the existing bus bar 105 is X2, resulting in insufficient existing adhesive film 103 in the area of ​​the existing bus bar 105, which is prone to bubble b defects.

[0045] In addition, butyl rubber itself has poor cohesion and insufficient bonding strength, and is prone to delamination from the packaging panel, resulting in insufficient sealing or causing the panel to burst under mechanical load, affecting the performance and life of the component, and resulting in a narrow process window and low yield.

[0046] Based on this, the purpose of the present invention is to provide a method for preparing a photovoltaic module and a photovoltaic module, which are used to improve the waterproof effect of edge sealing and solve the problem of poor air bubbles and lack of glue. It has low cost and precision requirements, simple process, and can improve the yield of photovoltaic modules.

[0047] refer to Figure 2 This embodiment provides a method for preparing a photovoltaic module, which is used to prepare a photovoltaic module with better waterproof effect, such as the following Fig. 9 The photovoltaic module 1000 shown includes: S1, providing a front panel; S2, providing a packaging panel; S3, arranging a battery string and an adhesive film on the front panel or the packaging panel, so that a gap is provided between the adhesive film and each side edge of the corresponding panel, and the adhesive film covers the upper and lower surfaces of the battery string; S4, arranging a high-resistance water-resistance adhesive strip on the front panel or the packaging panel, and the adhesive film and the high-resistance water-resistance adhesive strip are both made of organic polymer materials; S5, processing the front panel and the packaging panel by means of heating and laminating, so that the high-resistance water-resistance adhesive strip is attached between the adhesive film and the gap.

[0048] It can be understood that in step S3 and step S4, the so-called battery string, adhesive film and high water-resistance adhesive strip can be arranged together on the surface of the front plate or the packaging panel, or some of the components can be arranged separately on the front plate or the packaging panel. For example, the battery string and adhesive film are arranged on the front plate, and the high water-resistance adhesive strip is arranged on the packaging panel. For another example, the battery string is arranged on the front plate, and the adhesive film and high water-resistance adhesive strip are arranged on the packaging panel. There is no limitation to this.

[0049] In some embodiments, the high water-resistance adhesive strip is thermoplastic POE, and the adhesive film is EVA or EPE or POE.

[0050] Thermoplastic POE, EVA, EPE and POE are all organic polymer materials with good compatibility. They can be fused together during heating and lamination to avoid problems such as bubbles and lack of glue.

[0051] Optionally, in step S3, after the battery string and the adhesive film are arranged on the front plate or the packaging panel, the process further includes: arranging a bus bar on the front plate along the short side of the battery string; and making the adhesive film cover the upper and lower surfaces of the bus bar. The components are laid on the front plate through multiple conventional processes such as layout and stack welding.

[0052] Specifically, refer to Figure 3Step S4 may include: S41, preparing a packaging panel; S42, preparing a cut high-resistance water-resistant adhesive strip, and laying the high-resistance water-resistant adhesive strip on the edges of the packaging panel; S43, setting the high-resistance water-resistant adhesive strip on the packaging panel. Step S5 may include: S51, preparing a front plate, and placing the front plate and the packaging panel opposite to each other; S52, heating and laminating the front plate and the packaging panel.

[0053] Optionally, in step S43, the high-resistance water-resistant adhesive strip is pressed onto the packaging panel by heating and pressing.

[0054] In some embodiments, the front plate and the encapsulation panel can be made of glass.

[0055] Attached Figure 4 FIG. 4 shows the structure of the high water-resistance adhesive strip being pressed onto the packaging panel in step S43. Figure 5 FIG. 4 shows the structure of the photovoltaic module in step S51. Figure 6-Figure 7 The structure of the photovoltaic module before heating and lamination in step S52 is shown. Figure 4-Figure 7 The marking relationship is as follows: front panel-100, packaging panel-200, battery string-300, adhesive film-400, upper adhesive film-401, lower adhesive film-402, high-resistance water-resistant adhesive strip-500, bus bar-600; wherein the adhesive film 400 includes an upper adhesive film 401 and a lower adhesive film 402.

[0056] refer to Figure 4 In step S43, the high-resistance water-resistant adhesive strip 500 is heated and melted by heating and pressing, and is bonded and fixed to the packaging panel 200 by pressing and extruding.

[0057] refer to Figure 5 , the x direction indicates the long side direction of the front panel 100, and the y direction indicates the short side direction of the front panel 100. In step S51, the battery string 300 is laid on the surface of the front panel 100, and the bus bar 600 is arranged on the left side of the battery string 300 along the y direction. The adhesive film 400 covers the surface of the bus bar 600 and the battery string 300 to protect it. A certain gap is reserved between the left side wall of the adhesive film 400 and the front panel 100. A high-resistance water-resistant adhesive strip 500 is provided on the packaging panel 200, wherein the high-resistance water-resistant adhesive strip 500 is laid on the four edges of the packaging panel 200. Optionally, the length of the short side of the high-resistance water-resistant adhesive strip is 10mm-20mm.

[0058] refer to Figure 6, the x direction indicates the long side direction of the front plate 100, and the z direction indicates the thickness direction of the front plate 100. Before heating and lamination, the encapsulation panel 100 is arranged opposite to the front plate 200. The high-resistance water-resistant adhesive strip 500 is pressed on the surface of the encapsulation panel 100. The adhesive film 400 includes an upper adhesive film 401 and a lower adhesive film 402. The front plate 200 includes a lower adhesive film 402, a battery string 300 and an upper adhesive film 401 stacked in sequence from bottom to top. The surface area of ​​the upper adhesive film 401 and the lower adhesive film 402 is slightly larger than the surface area of ​​the battery string 300, and the battery string 300 is located between the upper adhesive film 401 and the lower adhesive film 402. The bus bar 600 is located on the left side of the battery string 300 along the short side direction of the packaging panel 200, and the inner end x1 of the short side of the high-resistance water-resistant adhesive strip 500 slightly exceeds the outer end x1' of the upper adhesive film 401 and the lower adhesive film 402 along the x direction, and the distance between the inner end x1 and the outer end x1' is L1. In this way, the high-resistance water-resistant adhesive strip 500 and the adhesive film 401 and the lower adhesive film 402 at the edge arranged along the long side direction of the packaging panel 100 all have overlapping parts, which can increase the material thickness of the bus bar 600 area during heating and lamination to avoid delamination of the adhesive film 400 or generation of bubbles, thereby improving the waterproof effect of the edge sealing.

[0059] In some embodiments, along the short side direction of the packaging panel 200, the length of the inner end x1 of the short side of the high-resistance water-resistant adhesive strip 500 exceeding the outer end x1' of the short side of the upper adhesive film 401 and the lower adhesive film 402 is in the range of 2mm-5mm, that is, the value range of L1 is 2mm-5mm.

[0060] Similarly, reference Figure 7 , the busbar 600 may not be considered for the appearance of the assembly along the long side direction of the packaging panel 200. The inner end x2 of the short side of the high-resistance water-resistant adhesive strip 500 slightly exceeds the outer end x2' of the upper adhesive film 401 and the lower adhesive film 402 along the x direction, and the distance between the inner end x2 and the outer end x2' is L2. The value range of the length of the inner end x2 of the short side of the high-resistance water-resistant adhesive strip 500 exceeding the outer end x2' of the short side of the upper adhesive film 401 and the lower adhesive film 402 is 0mm-3mm, that is, the value range of L2 is 0mm-3mm.

[0061] Optionally, since the length of the short side of the high-resistance water-resistance adhesive strip 500 along the long side direction of the encapsulation panel 200 will not affect the appearance and performance of the photovoltaic module, the inner end x2 of the short side of the high-resistance water-resistance adhesive strip 500 may not exceed the outer end x2' of the upper adhesive film 401 and the lower adhesive film 402. In this case, the length between the inner end x2 of the short side of the high-resistance water-resistance adhesive strip 500 and the outer end x2' of the short side of the adhesive film 400 ranges from 0mm to 2mm. That is, the complete value range of L2 is -2mm to 5mm.

[0062] refer to Figure 8, where the x direction indicates the long side direction of the front plate 100, and the z direction indicates the thickness direction of the front plate 100. Before heating and laminating, the length of the high-resistance water-resistant adhesive strip 500 along the long side direction of the package panel 200 is d1. After heating and laminating, since both the adhesive film 400 and the high-resistance water-resistant adhesive strip 500 are organic polymer materials, the adhesive film 400 can prevent the high-resistance water-resistant adhesive strip 500 from being squeezed out from the edge. The effective waterproof distance of the high-resistance water-resistant adhesive strip 500 on the left side to the bus bar 600 is D2. Comparison Figure 8 , Figure 1 From the above-mentioned photovoltaic module preparation method, it can be seen that the adhesive film 400 can prevent the high water-resistance adhesive strip 500 from being squeezed out, and a double-layer waterproof structure including the material of the high water-resistance adhesive strip 500 and the material of the adhesive film 400 is formed on the bus bar 600, thereby increasing the material thickness of the bus bar 600 area and avoiding bubble defects and delamination problems.

[0063] Attached Fig. 9 1 is a side view of a photovoltaic module 1000 provided in the present application. Figure 10-12 They are cross-sectional views corresponding to three possible structural representations of the photovoltaic module 1000. Fig.13 It is a partial top view of a photovoltaic assembly 1000 provided in the present application.

[0064] refer to Fig. 9 , this embodiment provides a side view of a photovoltaic module 1000, which includes: a front plate 100, a packaging panel 200, a battery string 300, a glue film 400, and a high-resistance water-resistance glue strip 500. The battery string 300 and the glue film 400 are provided on the side of the front plate 100 opposite to the packaging panel 200, and a gap is provided between the glue film 400 and each side edge of the front plate 100, and the glue film 400 covers the upper and lower surfaces of the battery string 300; the high-resistance water-resistance glue strip 500 is provided on the side of the packaging panel 200 opposite to the front plate 100, and the high-resistance water-resistance glue strip 500 is attached between the glue film 400 and the gap.

[0065] refer to Fig.10 , the x direction indicates the long side direction of the front plate 100, and the y direction indicates the thickness direction of the front plate 100. The adhesive film 400 specifically includes an upper adhesive film 401 and a lower adhesive film 402. The bus bar 600 is arranged on the left side of the battery cell 300. In the first structural representation that may appear in the photovoltaic module 1000, the high-resistance water-resistance adhesive strip 500 is wrapped on both sides of the bus bar 600, and the upper and lower surfaces of the bus bar 600 are covered with the material used for the high-resistance water-resistance adhesive strip 500, thereby preventing the bus bar 600 from being invaded by water vapor.

[0066] refer to Fig.11, the x direction indicates the long side direction of the front plate 100, and the y direction indicates the thickness direction of the front plate 100. Similarly, the adhesive film 400 specifically includes an upper adhesive film 401 and a lower adhesive film 402. The bus bar 600 is arranged on the left side of the battery cell 300. In the second structural representation that may appear in the photovoltaic module 1000, the upper adhesive film 401 and the lower adhesive film 402 are partially squeezed into the high-resistance water-resistant adhesive strip 500, and a groove C is formed on the left side of the bus bar 600, and the upper and lower surfaces of the bus bar 600 are covered with the material used for the high-resistance water-resistant adhesive strip 500.

[0067] refer to Fig.12 , the x direction indicates the long side direction of the front plate 100, and the y direction indicates the thickness direction of the front plate 100. Similarly, the adhesive film 400 specifically includes an upper adhesive film 401 and a lower adhesive film 402. The bus bar 600 is arranged on the left side of the battery cell 300. In the third structural representation that may appear in the photovoltaic module 1000, the upper adhesive film 401 and the lower adhesive film 402 are squeezed out from the bottom of the packaging panel 200, and a slope boundary is formed between the high-resistance water-resistant adhesive strip 500. The upper surface of the bus bar 600 is covered with the material used for the high-resistance water-resistant adhesive strip 500, and the lower surface is covered with the material used for the lower adhesive film 402.

[0068] contrast Figure 10-12 and Figure 1 It can be seen that the three structural characteristics of the photovoltaic module 1000 can provide an effective waterproof distance for the bus bar 600. At the same time, these three structural characteristics form a double-layer waterproof structure on the bus bar 600, which includes both the material of the high water-resistance rubber strip 500 and the material of the adhesive film 400, thereby increasing the material thickness of the bus bar 600 area and avoiding bubble defects and delamination problems.

[0069] In some embodiments, the high water-resistance adhesive strip is thermoplastic POE, and the adhesive film is EVA or EPE or POE.

[0070] Continue to refer Fig. 9 In some embodiments, the distance from the outer end of the adhesive film to the edge of the front plate is L3, and L3 is an effective waterproof distance greater than 10 mm, thereby ensuring the waterproof effect of the component.

[0071] In some embodiments, the front plate 100 is glass, and the encapsulation panel 200 is glass.

[0072] In one example, the front plate 100 and the encapsulation panel 200 of the photovoltaic module 1000 are both made of glass, with a size of 300*300mm, the thickness of the front plate 100 and the thickness of the encapsulation panel 200 are both 2mm, the high water-resistance adhesive strip 500 is made of thermoplastic POE, and the adhesive film 400 is made of conventional adhesive film material. The photovoltaic module 1000 is prepared by the above-mentioned photovoltaic module preparation method, and the short side width of the high water-resistance adhesive strip 500 cut out in the method is 15mm. The photovoltaic module 1000 is subjected to a HAST test, and there is no EL blackening after 288h, indicating that there is no water vapor intrusion.

[0073] Fig.13 It is a partial top view of a photovoltaic assembly 1000 provided in the present application.

[0074] refer to Fig.13 From the appearance of the photovoltaic module 1000, the high water-resistance rubber strip 500 is gray in color, has low light transmittance, high haze, and forms a clear boundary with the adhesive film 400. By comparison, at both sides of the photovoltaic module 1000, the high water-resistance rubber strip 500 can ensure an effective waterproof distance greater than 10 mm, thereby improving the waterproof effect of the edge seal.

[0075] It can be seen from the above embodiments that the present application provides a method for preparing a photovoltaic module and a photovoltaic module. By providing a front panel and a packaging panel, a film is set on the upper and lower surfaces of the battery string on the front panel, and a high water-resistance adhesive strip is set on the packaging panel. Then, the high water-resistance adhesive strip is adhered between the film and the gap by heating and laminating. Since the film and the high water-resistance adhesive strip are both made of organic polymer materials, they can be fused with each other after lamination. The fused material can increase the material thickness of the edge of the front panel, avoid delamination of the film, and further enhance the waterproof effect of the edge seal, thereby improving the reliability and life of the photovoltaic module.

[0076] The basic concepts have been described above. Obviously, for those skilled in the art, the above invention disclosure is only used as an example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0077] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0078] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more embodiments of the invention, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0079] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0080] Although the present application has been described with reference to the current specific embodiments, ordinary technicians in this technical field should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions may be made without departing from the spirit of the present application. Therefore, as long as the changes and modifications to the above embodiments are within the essential spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. A photovoltaic module, characterized in that: include: front panel; Encapsulation panel; A battery string and an adhesive film are located between the front plate and the packaging panel, a gap is provided between the adhesive film and each side edge of the front plate or the packaging panel, and the adhesive film covers the upper and lower surfaces of the battery string; A high water-resistance adhesive strip is located between the front plate and the packaging panel, and the high water-resistance adhesive strip is attached between the adhesive film and the gap. The adhesive film and the high water-resistance adhesive strip are both made of organic polymer materials.

2. The photovoltaic module according to claim 1, characterized in that: The high water-resistance rubber strip is thermoplastic POE, and the adhesive film is EVA or EPE or POE.

3. The photovoltaic module according to claim 1, characterized in that: A bus bar is also included, and the bus bar is arranged along the short side direction of the battery string.

4. The photovoltaic module according to claim 3, characterized in that: The high-resistance water-resistant rubber strip covers the upper and lower surfaces of the bus bar.

5. The photovoltaic module according to claim 4, characterized in that: The high water-resistance rubber strip covers the upper surface of the bus bar, and the rubber film includes an upper rubber film and a lower rubber film which are arranged opposite to each other, and the lower rubber film covers the lower surface of the bus bar.

6. The photovoltaic module according to claim 1, characterized in that: The distance from the outer end of the adhesive film to the edge of the front plate is greater than 10 mm.

7. The photovoltaic module according to claim 1, characterized in that: The front plate is made of glass, and the packaging panel is made of glass.

8. A method for preparing a photovoltaic module, characterized in that: Used to prepare the photovoltaic module according to any one of claims 1 to 7, comprising: Front panel provided; Provide packaging panels; Arranging a battery string and an adhesive film on the front plate or the packaging panel, so that a gap is provided between the adhesive film and each side edge of the corresponding panel, and the adhesive film covers the upper and lower surfaces of the battery string; A high water-resistance adhesive strip is arranged on the front plate or the packaging panel, and both the adhesive film and the high water-resistance adhesive strip are made of organic polymer materials; The front plate and the packaging panel are processed by heating and laminating so that the high-resistance water-resistant adhesive strip is attached between the adhesive film and the gap.

9. The method for preparing a photovoltaic module according to claim 8, characterized in that: The high water-resistance rubber strip is thermoplastic POE, and the adhesive film is EVA or EPE or POE.

10. The method for preparing a photovoltaic module according to claim 8, characterized in that: After the battery string and the adhesive film are arranged on the front plate or the packaging panel, the method further includes: A bus bar is arranged on the front plate along the short side direction of the battery string; The adhesive film covers the upper and lower surfaces of the bus bar.

11. The method for preparing a photovoltaic module according to claim 8, characterized in that: Along the short side direction of the packaging panel, the length of the inner end of the short side of the high-resistance water-resistant adhesive strip exceeding the outer end of the short side of the adhesive film ranges from 2 mm to 5 mm.

12. The method for preparing a photovoltaic module according to claim 8, characterized in that: Along the long side direction of the packaging panel, the length of the inner end of the short side of the high-resistance water-resistant adhesive strip exceeding the outer end of the short side of the adhesive film ranges from 0 mm to 3 mm; or, Along the long side direction of the packaging panel, the inner end of the short side of the high-resistance water-resistant rubber strip does not exceed the outer end of the short side of the adhesive film, and the length between the inner end of the short side of the high-resistance water-resistant rubber strip and the outer end of the short side of the adhesive film ranges from 0mm to 2mm.

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