CN116130560A - Photovoltaic curtain wall manufacturing method and photovoltaic curtain wall - Google Patents

Abstract

The embodiment of the present application relates to a photovoltaic curtain wall manufacturing method and a photovoltaic curtain wall. The manufacturing method includes: providing a first cover plate; providing a first adhesive film, and attaching the first adhesive film to the first cover plate; providing battery strings, battery strings There are opposite first surfaces and second surfaces, and the first surface of the battery string is bonded to the surface of the first adhesive film away from the first cover plate; the second adhesive film is provided, and the second adhesive film is attached to the second adhesive film of the battery string. Surface bonding: provide a second cover plate, attach the second cover plate to the surface of the second adhesive film away from the battery string, and use a lamination process to form a photovoltaic curtain wall; wherein, the thickness of the second cover plate is greater than or equal to the equivalent thickness , and the thickness of the first cover plate is smaller than the thickness of the second cover plate; the equivalent thickness is the thickness of the target cover plate that meets the preset conditions, and the material of the target cover plate is the same as that of the second cover plate, and the preset conditions include The target cover plate produces a preset amount of bending deformation under a preset load. At least it is beneficial to improve the photoelectric conversion efficiency and power of the photovoltaic curtain wall.

Description

Photovoltaic curtain wall manufacturing method and photovoltaic curtain wall

technical field

The embodiments of the present application relate to the technical field of solar cells, and in particular to a method for manufacturing a photovoltaic curtain wall and a photovoltaic curtain wall.

Background technique

Fossil energy has air pollution and limited reserves, while solar energy has the advantages of cleanness, pollution-free and abundant resources. Therefore, solar energy is gradually becoming the core clean energy to replace fossil energy. Due to the good photoelectric conversion efficiency of solar cells, solar cells have become The development focus of clean energy utilization.

In order to reduce carbon emissions, BIPV is becoming an important direction of building energy conservation. The existing BIPV is mainly used in curtain walls, industrial and commercial roofs and building roofs. Among them, the photovoltaic curtain wall is a manifestation of the application of photovoltaic building integration, that is, on the basis of the traditional curtain wall, photovoltaic modules are organically combined to make the curtain wall have the power generation capacity. Sandwiched to form a curtain wall assembly.

However, the photoelectric conversion efficiency of current curtain wall components is low, and the power generation is limited.

Contents of the invention

Embodiments of the present application provide a method for manufacturing a photovoltaic curtain wall and a photovoltaic curtain wall, which at least help to improve the photoelectric conversion efficiency and power generation of the photovoltaic curtain wall.

An embodiment of the present application provides a method for manufacturing a photovoltaic curtain wall, including: providing a first cover plate; providing a first adhesive film, and bonding the first adhesive film to the first cover plate; providing a battery string, and the battery string The string has opposite first surfaces and second surfaces, and the first surface of the battery string is bonded to the surface of the first adhesive film away from the first cover plate; a second adhesive film is provided to attach the first adhesive film to the The second adhesive film is attached to the second surface of the battery string; a second cover plate is provided, and the second cover plate is attached to the surface of the second adhesive film away from the battery string, and The photovoltaic curtain wall is formed by a lamination process; wherein, the thickness of the second cover plate is greater than or equal to the equivalent thickness, and the thickness of the first cover plate is smaller than the thickness of the second cover plate; the equivalent thickness The target cover plate has a thickness that satisfies a preset condition, the material of the target cover plate is the same as that of the second cover plate, and the preset condition includes that the target cover plate produces a preset load under a preset load. amount of bending deformation.

In addition, the step of forming the photovoltaic curtain wall further includes: laying a third adhesive film between the first adhesive film and the second adhesive film, the third adhesive film facing the edge of the second cover plate , and the edge of the second cover plate is not covered by the orthographic projection of the battery string on the second cover plate.

In addition, the width of the third adhesive film is greater than or equal to 10mm.

In addition, the battery string includes a plurality of sub-battery strings arranged at intervals along the first direction, and the step of forming the photovoltaic curtain wall further includes: laying a fourth adhesive film between the target sub-battery strings, and the fourth adhesive film respectively bonded to the first adhesive film and the second adhesive film, wherein the target sub-battery string is one of the plurality of sub-battery strings whose interval along the first direction is greater than or equal to a preset value Adjacent sub-battery strings.

In addition, the battery string includes output wires, and the step of forming the photovoltaic curtain wall further includes: opening an outlet hole on the first cover plate or the second cover plate, and the outlet hole is used to lead out the the output wires described above.

In addition, the first cover plate or the second cover plate includes a third surface adjacent to the battery string, and the step of making the photovoltaic curtain wall further includes: providing a fifth adhesive film, the openings on the third surface The hole area is located within the orthographic projection of the fifth adhesive film on the third surface.

In addition, the providing the first adhesive film includes: providing the first adhesive film capable of completely covering the surface of the first cover plate in contact with the first adhesive film, and the edge of the first adhesive film is in contact with the first adhesive film. The distance between the edges of the first cover plate is greater than 3mm.

In addition, the providing the second adhesive film includes: providing the second adhesive film capable of completely covering the surface of the second cover plate in contact with the second adhesive film, and the edge of the second adhesive film is in contact with the second adhesive film. The distance between the edges of the second cover plate is greater than 3mm.

In addition, the lamination process includes: using a laminator and/or an autoclave for lamination.

In addition, it also includes: setting at least one bypass diode for the battery string.

Correspondingly, the embodiment of the present application also provides a photovoltaic curtain wall, which is formed by the above-mentioned photovoltaic curtain wall manufacturing method, including: a first cover plate, a battery string and a second cover plate sequentially stacked; The first cover plate and the second cover plate cover the battery string.

The technical solutions provided by the embodiments of the present application have at least the following advantages:

In the photovoltaic curtain wall manufacturing method provided in the embodiment of the present application, in the process of forming the photovoltaic curtain wall, the first cover plate, the first adhesive film, the battery string, the second adhesive film and the second cover plate are provided, and the first adhesive film and the second cover plate are respectively and The first cover plate is attached to the battery string, and the second adhesive film is respectively attached to the second cover plate and the battery string, and then a photovoltaic curtain wall is formed through a lamination process. Before providing the first cover plate and the second cover plate, the amount of bending deformation that occurs under the preset load is the preset amount of bending deformation, and the thickness of the target cover plate that is made of the same material as the second cover plate is taken as an equivalent thickness, and then provide a second cover plate with a thickness greater than or equal to the equivalent thickness, and a first cover plate with a thickness smaller than the second cover plate to prepare the photovoltaic curtain wall. The thickness of the target cover plate that is the same as the material of the second cover plate and has a predetermined amount of bending deformation under a preset load is taken as the equivalent thickness, and the second cover plate with a thickness greater than or equal to the equivalent thickness is selected for the photovoltaic curtain wall. Prepared so that the second cover plate can independently bear the strength requirements of the photovoltaic curtain wall, and then when selecting the first cover plate, the first cover plate with a thickness smaller than the second cover plate can be selected, and the selected first cover plate can be reduced in quantity. The thickness of the cover plate is to increase the light transmittance of the first cover plate, so that on the basis of ensuring the mechanical strength of the photovoltaic curtain wall, the light energy received by the battery string is increased, and the number of photogenerated carriers generated by the battery string is increased. Further, the photoelectric conversion efficiency and power generation power of the formed photovoltaic curtain wall are improved.

Description of drawings

One or more embodiments are exemplified by corresponding pictures in the drawings, and these exemplifications are not construed as limiting the embodiments, unless otherwise stated, and the pictures in the drawings are not limited in scale.

Fig. 1 is a flow chart of a method for manufacturing a photovoltaic curtain wall provided by an embodiment of the present application;

Fig. 2 is a schematic diagram of a semi-finished photovoltaic curtain wall structure provided by an embodiment of the present application;

Fig. 3 is a schematic structural diagram of another semi-finished photovoltaic curtain wall provided by an embodiment of the present application;

FIG. 4 is a schematic plan view of a third adhesive film provided by an embodiment of the present application;

5 is a schematic plan view of a fourth adhesive film provided by an embodiment of the present application;

Fig. 6 is a schematic plan view of a combination of a third adhesive film and a fourth adhesive film provided by an embodiment of the present application;

Fig. 7 is a schematic plan view of a fourth adhesive film provided by an embodiment of the present application;

Fig. 8 is a schematic structural diagram of another semi-finished photovoltaic curtain wall provided by an embodiment of the present application;

Fig. 9 is a schematic structural diagram of another semi-finished photovoltaic curtain wall provided by an embodiment of the present application;

Fig. 10 is a schematic structural diagram of another semi-finished photovoltaic curtain wall provided by an embodiment of the present application;

Fig. 11 is a schematic structural diagram of a photovoltaic curtain wall provided by another embodiment of the present application.

Detailed ways

It can be seen from the background art that the photoelectric conversion efficiency of the current photovoltaic curtain wall components is low, and the power generation is limited.

An embodiment of the present application provides a method for manufacturing a photovoltaic curtain wall. In the process of forming a photovoltaic curtain wall, a first cover, a first adhesive film, a battery string, a second adhesive film, and a second cover are provided, and the first adhesive The film is attached to the first cover plate and the battery string respectively, and the second adhesive film is respectively attached to the second cover plate and the battery string, and then a photovoltaic curtain wall is formed through a lamination process. Before providing the first cover plate and the second cover plate, the amount of bending deformation that occurs under the preset load is the preset amount of bending deformation, and the thickness of the target cover plate that is made of the same material as the second cover plate is taken as an equivalent thickness, and then provide a second cover plate with a thickness greater than or equal to the equivalent thickness, and a first cover plate with a thickness smaller than the second cover plate to prepare the photovoltaic curtain wall. The thickness of the target cover plate that is the same as the material of the second cover plate and has a predetermined amount of bending deformation under a preset load is taken as the equivalent thickness, and the second cover plate with a thickness greater than or equal to the equivalent thickness is selected for the photovoltaic curtain wall. Prepared so that the second cover plate can independently bear the strength requirements of the photovoltaic curtain wall, and then when selecting the first cover plate, the first cover plate with a thickness smaller than the second cover plate can be selected, and the selected first cover plate can be reduced in quantity. The thickness of the cover plate is to increase the light transmittance of the first cover plate, so that on the basis of ensuring the mechanical strength of the photovoltaic curtain wall, the light energy received by the battery string is increased, and the number of photogenerated carriers generated by the battery string is increased. Further, the photoelectric conversion efficiency and power generation power of the formed photovoltaic curtain wall are improved.

Various embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the application, many technical details are provided for readers to better understand the application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can also be realized.

An embodiment of the present application provides a method for manufacturing a photovoltaic curtain wall, which is applied to photovoltaic curtain wall production equipment. For the specific process of producing a photovoltaic curtain wall, refer to FIG. 1 .

Refer to Figure 1 and Figure 2. A first cover plate 101 is provided. Wherein, Fig. 2 is a structural schematic diagram of the photovoltaic curtain wall before lamination.

In the process of making the photovoltaic curtain wall, according to the subsequent application scenarios of the photovoltaic curtain wall and the performance requirements of the photovoltaic curtain wall, a cover plate of a suitable material can be selected as the first cover plate 101, and the first cover plate 101 can be placed on the process table superior. For example, the first cover 101 can be a glass cover, such as patterned glass, tempered glass, semi-tempered glass, plexiglass or curved glass, etc., and can also be a plastic cover, such as polyvinyl fluoride film or ethylene-tetrafluoroethylene. Vinyl fluoride copolymer film, etc.

In addition, when providing the first cover plate 101, the surface of the first cover plate 101 can also be cleaned by solution cleaning or high-pressure blowing, so as to improve the smoothness of the surface of the first cover plate 101 and avoid the formation of photovoltaic curtain wall There are obvious defects due to the influence of impurities, etc. Wherein, the solution cleaning can be performed with water or alcohol, and the high-pressure blowing can be carried out by compressed air or inert gas with a pressure of 1 to 3 standard atmospheres.

A first adhesive film 102 is provided, and the first adhesive film 102 is attached to the first cover plate 101 .

Photovoltaic curtain walls are usually constructed with an adhesive film as the middle layer. Therefore, according to the strength or performance requirements of the photovoltaic curtain wall, an adhesive film of appropriate material is selected as the first adhesive film 102. For example, an adhesive film made of ethylene-vinyl acetate copolymer (EVA), An adhesive film made of ethylene-octene copolymer (POE) or polyvinyl butyral (PVB) is used as the first adhesive film 102 . Then attach the first adhesive film 102 to the first cover plate 101 .

A battery string 103 is provided. The battery string 103 has a first surface and a second surface opposite to each other. The first surface of the battery string 103 is attached to the surface of the first adhesive film 102 away from the first cover 101 .

In the process of preparing the photovoltaic curtain wall, a plurality of suitable solar cells can be selected first to construct the battery string 103 in the photovoltaic curtain wall by connecting in series and/or in parallel. For example, if both the power and thickness of the photovoltaic curtain wall are required, crystalline silicon solar cells can be preferred, and crystalline silicon solar cells can be monocrystalline silicon cells or polycrystalline silicon cells. When the thickness of the photovoltaic curtain wall is required to be as small as possible, thin-film solar cells can be selected, such as cadmium telluride thin-film cells, copper indium gallium selenide thin-film cells, silicon-based thin-film solar cells or perovskite thin-film solar cells. In the case that the power of the photovoltaic curtain wall is required to be as large as possible, stacked solar cells or crystalline silicon cells or stacked cells that receive light on both sides can be selected. Therefore, the type of cells used to construct the cell string 103 may be any one or a combination of crystalline silicon cells, cadmium telluride thin-film cells, copper indium gallium selenide thin-film cells, silicon-based thin-film solar cells, and tandem solar cells.

After the construction of the battery string 103 is completed in advance, the first surface of the battery string 103 is attached to the surface of the first adhesive film 102 away from the first cover plate 101 . In the process of laminating the battery string 103 and the first adhesive film 102, when the light-receiving surfaces of the battery pieces in the battery string 103 are all on the same side, the first surface is the light-receiving surface of each battery piece in the battery string 103 In the case that the light-receiving surfaces of the battery slices in the battery string 103 are not all on the same side, the first surface is the surface formed by the light-receiving surfaces of most battery slices in the battery string 103 or the one with the greater power sum in the battery string 103 The surface composed of the light-receiving surface of each battery sheet. By orienting the light-receiving surface or the side with higher photoelectric conversion power of the battery string 103 toward the first cover plate 101 , it is beneficial to increase the overall power generation of the photovoltaic curtain wall when the thinner first cover plate 101 is used to construct the photovoltaic curtain wall.

A second adhesive film 104 is provided, and the second adhesive film 104 is attached to the second surface of the battery string 103 .

The photovoltaic curtain wall needs to use an adhesive film as the middle layer to bond the battery string 103 and the cover plates on both sides respectively. Therefore, according to the strength or performance requirements of the photovoltaic curtain wall, an adhesive film of appropriate material is selected as the second adhesive film 104. For example, the second adhesive film 104 is made of An adhesive film composed of ethylene-vinyl acetate copolymer (EVA), ethylene-octene copolymer (POE) or polyvinyl butyral (PVB) is used as the second adhesive film 104, and then the second adhesive film 104 and the battery string The second surface of 103 is attached. In the process of selecting the first adhesive film 102 and the second adhesive film 104, adhesive films of the same material can be selected as the first adhesive film 102 and the second adhesive film 104 respectively, or adhesive films of different materials can be selected as the first adhesive film 104 respectively. A glue film 102 and a second glue film 104 .

A second cover plate 105 is provided, and the second cover plate 105 is attached to the surface of the second adhesive film 104 away from the battery string 103 , and a photovoltaic curtain wall is formed by a lamination process.

In the process of preparing the photovoltaic curtain wall, the first cover plate 101 and the second cover plate 105 are selected according to the strength requirements of the photovoltaic curtain wall, and the thickness of the selected second cover plate 105 is greater than or equal to the equivalent thickness. The thickness of the first cover 101 is smaller than the thickness of the second cover 105 . Then attach the selected second cover plate 105 to the surface of the second adhesive film 104 away from the battery string 103 to complete the assembly of the basic structure of the photovoltaic curtain wall, and then process the basic structure through a lamination process to complete the preparation of the photovoltaic curtain wall. Wherein, the equivalent thickness is the thickness of the target cover plate that satisfies the preset condition, the material of the target cover plate is the same as that of the second cover plate, and the preset condition includes that the target cover plate produces a preset amount of bending deformation under a preset load .

That is to say, during the preparation process of the photovoltaic curtain wall, according to the strength requirements of the photovoltaic curtain wall, that is, the bending deformation of the photovoltaic curtain wall under the preset load can be used as the preset bending deformation, and then the second cover plate 105 material The thickness of the same target cover plate when the preset amount of bending deformation occurs under the preset load is taken as the equivalent thickness. In the process of selecting the first cover plate 101 and the second cover plate 105, select the second cover plate 105 whose thickness is greater than or equal to the equivalent thickness, and the first cover plate 101 whose thickness is smaller than the second cover plate to prepare the photovoltaic curtain wall .

According to the target strength of the photovoltaic curtain wall in advance, the thickness of the target cover plate that is the same material as the second cover plate 105 and can independently meet the strength requirements is taken as the equivalent thickness, and the second cover plate 105 with a thickness greater than or equal to the equivalent thickness is selected for the process. The preparation of the photovoltaic curtain wall enables the strength requirements of the photovoltaic curtain wall to be independently borne by the second cover plate 105, and then when selecting the first cover plate 101, the first cover plate 101 with a thickness smaller than the second cover plate 105 can be selected, and further Reduce the thickness of the selected first cover plate 101 to increase the light transmittance of the first cover plate 101 and reduce the overall weight of the photovoltaic curtain wall, thereby ensuring the mechanical strength of the photovoltaic curtain wall. The increase in light energy increases the number of light-generated carriers generated by the battery string 103, thereby improving the photoelectric conversion efficiency and power generation power of the photovoltaic curtain wall.

It is worth mentioning that when the photovoltaic curtain wall leaves the factory, the specification parameters will be calibrated. The calibrated specification parameters generally include various parameters such as the size, strength, and power generation power of the photovoltaic curtain wall. The preset load and preset bending deformation belong to the photovoltaic curtain wall. The strength parameter, the preset load is the load calibrated in the specification parameters, which identifies the load used to calibrate the bending deformation of the photovoltaic curtain wall; the preset bending deformation is the bending deformation calibrated in the specification parameters, which identifies the photovoltaic curtain wall under the load The specific magnitude of the amount of bending deformation that occurs when the load is preset.

In addition, when the traditional photovoltaic curtain wall performs strength parameter calibration, the strength of the photovoltaic curtain wall is determined according to the way that the two-layer cover plate participates in the structural calculation, while the photovoltaic curtain wall in the embodiment of the application uses the second cover plate 105 to independently participate in the structural calculation load. The load is designed, so the strength parameter can be calibrated only according to the thickness of the second cover plate 105 .

In addition, the second cover plate 105 can be a glass cover plate, such as tempered glass, semi-tempered glass, curved glass or plexiglass, etc., and can also be a cover plate made of other materials with high strength, such as a high-strength plastic cover plate, Composite glass, etc. The materials of the first cover plate 101 and the second cover plate 105 may be the same or different, and the embodiment of the present application does not limit the specific materials of the first cover plate 101 and the second cover plate 105 .

The thickness of the first cover plate 101 selected in the process of preparing the photovoltaic curtain wall can be in the range of 1mm to 4mm, for example, 1.1mm, 1.35mm, 1.75mm, 2.5mm, 2.75mm, 3mm, 3.5mm or 3.8mm, etc., to improve While the first cover 101 is transparent, it is ensured that the first cover 101 has sufficient protection capability. The thickness difference between the second cover plate 105 and the first cover plate 101 can be controlled at 3mm to 15mm, for example, the thickness difference can be controlled as 3.5mm, 3.75mm, 4.5mm, 5.75mm, 6.5mm, 7.75mm, 9mm, 12mm, 13.5mm or 14.75mm etc. The specific thickness of the second cover plate 105 can be adjusted according to the application scenario and the strength requirements of the photovoltaic curtain wall. For example, in the case of a traditional photovoltaic curtain wall that requires the strength of the photovoltaic curtain wall to be not less than 5mm+5mm, you can choose a thickness greater than or equal to 6.3mm. The second cover plate 105; when the strength of the photovoltaic curtain wall is required to be not lower than that of the traditional photovoltaic curtain wall with a cover plate thickness of 6mm+6mm, the second cover plate 105 with a thickness greater than or equal to 7.56mm can be selected; the strength of the photovoltaic curtain wall is required to be not low In the case of a traditional photovoltaic curtain wall with a cover plate thickness of 10mm+10mm, the second cover plate 105 with a thickness greater than or equal to 12.6mm can be selected; the strength of the photovoltaic curtain wall is required to be not lower than that of a traditional photovoltaic curtain wall with a cover plate thickness of 12mm+12mm In some cases, the second cover plate 105 with a thickness greater than or equal to 15.12 mm can be selected.

In some embodiments, the lamination process includes: using a laminator and/or an autoclave for lamination.

During the lamination process, the lamination method adopted in the lamination process can be selected according to the specific materials of the selected first adhesive film 102 and second adhesive film 104, for example, the first adhesive film 102 and the second adhesive film When none of the films 104 are PVB adhesive films, the lamination process can be directly performed using a laminator; when there is a PVB adhesive film in the first adhesive film 102 and the second adhesive film 104, an autoclave can be used to carry out the lamination process. Press or use a laminator for one lamination, and then use an autoclave for a second lamination. By selecting different lamination methods according to the material of the adhesive film for lamination, the reliability of the formed photovoltaic curtain wall is improved.

In addition, before the lamination process, high temperature resistant adhesive tape can also be used to seal the edge of the photovoltaic curtain wall infrastructure to be laminated, that is, to wrap the edge of the photovoltaic curtain wall infrastructure, and then install a laminate on the edge of the photovoltaic curtain wall infrastructure Tooling, and put the basic structure of the photovoltaic curtain wall with the lamination tooling installed into the laminator for lamination. Among them, the material of the lamination tooling can be epoxy resin, aluminum, high temperature resistant resin materials, etc. The width of the lamination tooling can be selected to be greater than 10mm, and the height of the lamination tooling should be greater than the total thickness of the basic structure of the photovoltaic curtain wall. The overall thickness of the structure is 1-5 mm larger.

In some embodiments, the lamination process parameters using a laminator include: a lamination temperature of 120 degrees Celsius to 165 degrees Celsius, a lamination time of 40 minutes to 120 minutes, and a lamination pressure of 0.1 standard atmosphere to 1 standard atmospheric pressure.

In the lamination process using a laminator, in order to ensure the reliability of the photovoltaic curtain wall, some parameters in the lamination process need to be specially limited according to the specifications of the photovoltaic curtain wall. For example, when the area of the photovoltaic curtain wall is larger, the thickness of the cover plate is larger, or the thickness of the adhesive film is larger, it is necessary to set a longer lamination time to avoid the situation where the adhesive film is not melted; similarly, in When the area of the photovoltaic curtain wall is larger, the thickness of the cover plate is larger, or the thickness of the adhesive film is larger, the pressure of lamination can also be set higher, and the time of vacuuming during the lamination process can be set longer.

Therefore, considering the specifications of the more commonly used photovoltaic curtain walls, during the lamination process using a laminator, set the lamination temperature of the laminator at 120 degrees Celsius to 165 degrees Celsius, for example, 125 degrees Celsius, 135 degrees Celsius or 155 degrees Celsius Celsius, etc.; set the lamination time to 40 minutes to 120 minutes, for example, 45 minutes, 60 minutes, 75 minutes, 90 minutes or 110 minutes, etc.; set the lamination pressure to 0.1 standard atmosphere to 1 standard atmosphere, for example , 0.2 standard atmosphere, 0.35 standard atmosphere, 0.5 standard atmosphere, 0.75 standard atmosphere or 0.9 standard atmosphere, etc.

In addition, when using a laminator for the lamination process, if a single-cavity laminator is used, the lamination time needs to be set to more than 25 minutes, and the vacuuming time should be set to more than 15 minutes. If a double-cavity laminator is used, It is necessary to set the vacuuming time of each layer to more than 10 minutes, and the lamination time of each layer is not less than 15 minutes. During the lamination process, the area of the heating area inside the laminator should be set larger than the area of the photovoltaic curtain wall module to ensure that the adhesive film can be heated and melted.

In some embodiments, the lamination process parameters using an autoclave include: a lamination temperature of 120 degrees Celsius to 180 degrees Celsius, a lamination pressure of 3 standard atmospheres to 6 standard atmospheres, and a lamination time of 10 minutes to 30 minutes .

Similar to the lamination process using a laminator, when using an autoclave for the lamination process, it is also necessary to set some lamination parameters according to the specifications of the photovoltaic curtain wall. For example, set the lamination temperature of the autoclave at 120 degrees Celsius to 180 degrees Celsius, for example, 125 degrees Celsius, 135 degrees Celsius, 155 degrees Celsius or 175 degrees Celsius, etc.; set the lamination time to 10 minutes to 30 minutes, for example, 12 minutes, 15 minutes, 20 minutes, 25 minutes or 28 minutes, etc.; The lamination pressure is set to 3 atmospheres to 6 atmospheres, for example, 3.5 atmospheres, 4 atmospheres, 4.75 atmospheres, 5.25 atmospheres or 5.65 atmospheres, etc. The reliability of the photovoltaic curtain wall is ensured by setting the lamination parameters in the lamination process to an appropriate size according to the specifications of the photovoltaic curtain wall.

Referring to FIG. 1 to FIG. 4 , FIG. 3 is a schematic structural view of a photovoltaic curtain wall including the third adhesive film 106 , and FIG. 4 is a schematic plan view of the third adhesive film 106 . In some embodiments, the step of preparing a photovoltaic curtain wall further includes: laying a third adhesive film 106 between the first adhesive film 102 and the second adhesive film 104, the third adhesive film 106 facing the edge of the second cover plate 105, And the edge of the second cover 105 is not covered by the orthographic projection of the battery string 103 on the second cover 105 .

During the preparation of the photovoltaic curtain wall, the battery strings 103 usually only cover a part of the photovoltaic curtain wall, that is, the projection of the battery strings 103 on the first cover plate 101 and the second cover plate 105 will not completely cover the first cover plate 101 and the second cover plate 105. Since the battery sheets contained in the battery string 103 also have a certain thickness, the arrangement of the battery string 103 will cause a cavity between the first adhesive film 102 and the second adhesive film 104. During the lamination process, it may This will lead to lack of glue or the formation of air bubbles, thereby affecting the bonding effect of the formed photovoltaic curtain wall packaging film to the first cover plate 101 and the second cover plate 105 .

Therefore, in the process of preparing the photovoltaic curtain wall, according to the orthographic projection of the battery string 103 on the first cover 101 or the second cover 105 , the edge 30 of the cover that the battery string 103 cannot be covered by the orthographic projection can be determined. Then, in the process of preparing the photovoltaic curtain wall, the third adhesive film 106 is formed directly above the edge 30 of the cover plate, and the third adhesive film 106 is used to fill the cavity generated by the battery string 103 to avoid the cover plate due to lack of glue. The encapsulation film formed between them is uneven or even has bubbles, which improves the reliability and aesthetics of the photovoltaic curtain wall.

It is worth mentioning that, in order to facilitate understanding, the embodiment of the present application takes the formed third adhesive film 106 completely surrounding the battery string 103 as an example, and the orthographic projection of the third adhesive film 106 on the cover plate does not completely cover the edge of the cover plate. , wherein the edge 30 of the cover plate may be the edge of the first cover plate 101 or the edge of the second cover plate 105 . In the process of preparing the third adhesive film 106, the third adhesive film 106 can be made of a plurality of discontinuous adhesive strips, or can be a closed figure formed by a plurality of adhesive strips; the third adhesive film 106 can completely cover the cover The board edge 30 may also only cover a partial area of the cover board edge 30 , and the embodiment of the present application does not limit the specific preparation method of the third adhesive film 106 .

In some embodiments, the width of the third adhesive film 106 is greater than or equal to 10 mm.

The width of the third adhesive film 106 refers to the pattern width w of the orthographic projection of the third adhesive film 106 on the second cover plate 105 . When the width of the third adhesive film 106 is too small, the amount of adhesive film that the third adhesive film 106 can provide is limited, and cannot effectively fill the gap between the first adhesive film 102 and the second adhesive film 104 when the battery string 103 is set. Therefore, the width of the third adhesive film 106 can be set within a range greater than or equal to 10 mm, for example, the width of the third adhesive film 106 can be set to 11 mm, 12.5 mm, 15 mm, 18 mm or 20 mm. By setting the width of the third adhesive film 106 within an appropriate range, the amount of adhesive film that the third adhesive film 106 can provide can be increased to ensure that the cavity formed by the battery string 103 can be effectively filled as much as possible, thereby improving the photovoltaic curtain wall. reliability.

Referring to FIG. 1 to FIG. 5 , FIG. 5 is a schematic plan view of the fourth adhesive film 107 , and the X direction is the first direction. In some embodiments, the battery string 103 includes a plurality of sub-battery strings 31 arranged at intervals along the first direction, and the step of forming a photovoltaic curtain wall further includes: laying a fourth glue film 107 between the target sub-battery strings, and the fourth glue The film 107 is attached to the first adhesive film 102 and the second adhesive film 104 respectively, wherein the target sub-battery strings are adjacent sub-battery strings whose interval along the first direction is greater than or equal to a preset value among the multiple sub-battery strings 31 31.

The interval between adjacent sub-battery strings 31 refers to the interval between two opposite sides of two adjacent sub-battery strings 31 in the orthographic projection on the cover plate. Before the preparation of the photovoltaic curtain wall, each sub-battery string 31 can be arranged in advance along the first direction, and then the battery string 103 is formed by connecting a plurality of sub-battery strings 31 in series and/or in parallel. If the distance between the adjacent sub-battery strings 31 is too large, a cavity with a large volume will be formed between the first adhesive film 102 and the second adhesive film 104, and the lamination process will also cause the first adhesive The packaging film composed of the film 102 and the second adhesive film 104 forms air bubbles in the area where the cavity is located or above the area where the cavity is located, affecting the reliability and aesthetics of the photovoltaic curtain wall.

Therefore, in the process of preparing the photovoltaic curtain wall, the distance between the adjacent sub-battery strings 31 along the first direction is detected. For the adjacent sub-battery strings 31 whose interval is greater than or equal to the preset value, the adjacent sub-battery strings 31 whose interval is greater than or equal to the preset value are used as the target sub-battery strings, and according to the position of the target sub-battery strings, the The fourth adhesive film 107 is formed in the region. By forming the fourth adhesive film 107 between the target sub-battery strings, the cavity between the sub-battery strings 31 is filled, and the quality of the packaging film formed after lamination and the reliability of the photovoltaic curtain wall are improved.

Wherein, the preset value of the distance between the target sub-battery strings along the first direction may be between 5mm and 200mm, for example, the preset value may be 5mm, 7.5mm, 10mm, 15mm, 25mm, 35mm, 50mm, 75mm, 100mm, 130mm, 150mm, 175mm, or 190mm, etc., which are not limited in this embodiment of the present application.

It is worth mentioning that in the embodiment of the present application, for ease of understanding, the fourth glue film 107 formed does not completely cover the area between the target sub-battery strings as an example. During the preparation of the fourth adhesive film 107 , the fourth adhesive film 107 may completely cover the area between the target sub-battery strings, and may continue to extend outward while completely covering the area between the target sub-battery strings. FIG. 6 is a schematic structural diagram of the combination of the fourth adhesive film 107 and the third adhesive film 106 , that is, the fourth adhesive film 107 extends to a position in contact with the third adhesive film 106 completely surrounding the battery string 103 .

In some embodiments, the battery string 103 includes output wires, and the step of forming the photovoltaic curtain wall further includes: opening an outlet hole on the first cover 101 or the second cover 105, and the outlet opening is used to lead out the output wire.

In the process of preparing the photovoltaic curtain wall, it is not only necessary to ensure the strength and reliability of the photovoltaic curtain wall, but also to ensure that the electric energy generated by the photovoltaic curtain wall can be utilized. Therefore, during the process of preparing the battery string 103 , an output wire for outputting electric energy generated by the battery string 103 is reserved. After selecting the first cover plate 101 and the second cover plate 105, according to the preset placement position of the battery string 103 in the photovoltaic curtain wall, it is determined to lead out the battery string 103 on the first cover plate 101 or the second cover plate 105 Outputs the target location of the wire. Then make a hole at the target position on the first cover plate 101 or the second cover plate 105, and open an outlet opening for leading out the output wire, and the number of the outlet opening is at least one.

It is worth mentioning that the shape of the outlet opening on the surface of the cover can be circular, elliptical, or polygonal, and the extension direction of the outlet opening is given priority to the direction perpendicular to the surface of the cover. In order to reduce the damage to the strength of the photovoltaic curtain wall by the outlet opening, the diameter of the opening is 5mm to 10mm when the opening is circular, and the opening is located on the side surface of the cover plate when the opening is polygonal. The maximum distance between any two points shall not exceed 10mm. In addition, during the process of making the outlet openings, it is also possible to give priority to forming the outlet openings on the first cover plate 101 , so as to avoid the influence of the outlet openings on the strength of the photovoltaic curtain wall.

In addition, in the process of making outlet openings, the outlet openings can also be directly set on the side of the photovoltaic curtain wall, that is, the outlet openings are formed on the exposed surface of the encapsulation film formed after lamination, and photovoltaic The output of curtain wall electrical energy. When the outlet hole is set in the way of side outlet, the damage to the strength of the first cover plate 101 or the second cover plate 105 by the outlet hole can be reduced as much as possible, and the safety of the first cover plate 101 or the second cover plate 105 can be improved. sex.

1 to 4 and FIG. 7, wherein, FIG. 7 is a schematic plan view of the fifth adhesive film 108 on the third surface 40, in some embodiments, the first cover 101 or the second cover 105 includes adjacent battery The third surface 40 of the string 103, after the outlet openings are formed, further includes: providing a fifth adhesive film 108, and the opening area 41 on the third surface 40 is located at the orthographic projection of the fifth adhesive film 108 on the third surface 40 Inside.

After the outlet hole is formed on the first cover plate 101 or the second cover plate 105, during the lamination process, the adhesive film will melt and flow and the outlet hole will be a larger vacancy, so after the area where the outlet hole is melted The adhesive film will flow into the outlet opening, resulting in the reduction of the adhesive film between the first cover plate 101 and the second cover plate 105, which will lead to the problem of lack of glue or uneven distribution of the adhesive film in the area near the outlet opening, and then As a result, there are bubbles or lack of glue in the packaging film formed after lamination.

Therefore, in the process of preparing the photovoltaic curtain wall, the fifth adhesive film 108 can be formed on the third surface 40 of the first cover plate 101 or the second cover plate 105 adjacent to the battery string 103 with outlet openings formed in advance. The adhesive film 108 is located above the opening area 41 on the third surface 40 , and the orthographic projection of the fifth adhesive film 108 on the third surface 40 can completely wrap the opening area 41 , that is, the opening area 41 on the third surface 40 Located within the orthographic projection of the fifth adhesive film 108 on the third surface 40 . Wherein, the third surface 40 may be the surface of the first cover plate 101 adjacent to the battery string 103 , or the surface of the second cover plate 105 adjacent to the battery string 103 .

In addition, the fifth adhesive film 108 can also be directly arranged between the first adhesive film 102 and the second adhesive film 104, and is directly opposite to the outlet opening, so as to ensure that the orthographic projection of the fifth adhesive film 108 on the third surface 40 can be It only needs to completely wrap the opening area 41 , and the embodiment of the present application does not limit the specific location of the fifth adhesive film 108 .

It is worth mentioning that, in the process of forming the fifth adhesive film 108, the thickness of the fifth adhesive film 108 also needs to be controlled. If the thickness of the fifth adhesive film 108 is too large, the lamination process may cause the The fifth adhesive film 108 or the adhesive film in contact with the fifth adhesive film 108 is not melted, which affects the reliability of the formed photovoltaic curtain wall. When the fifth adhesive film 108 is too thin, the fifth adhesive film 108 can The amount of adhesive film provided is small, which may not be able to effectively replenish the adhesive film lost through the outlet opening during the lamination process, and the ability to reduce air bubbles or lack of adhesive in the packaging film is limited. Therefore, the thickness of the fifth adhesive film 108 can be set within a range of 1/4 to 3/4 of the thickness of the first adhesive film 102 or the second adhesive film 104 adjacent to the fifth adhesive film 108 .

In addition, another factor that affects the amount of adhesive film that the fifth adhesive film 108 can provide is the area of the orthographic projection of the fifth adhesive film 108 on the third surface 40 , and the fifth adhesive film 108 can also be positively projected on the third surface 40 The projected area is set to be 1.5 to 2.5 times the area of the opening area 41 , so as to ensure that the fifth adhesive film 108 can effectively laminate the adhesive film lost through the outlet opening.

1 to 8, in some embodiments, providing the first adhesive film 102 includes: providing the first adhesive film 102 that can completely cover the surface of the first cover 101 in contact with the first adhesive film 102, and the first adhesive The distance between the edge of the film 102 and the edge of the first cover plate 101 is greater than 3 mm.

In the process of forming the photovoltaic curtain wall, the first adhesive film 102 may be deformed or shrunk due to heat during lamination, and the first adhesive film 102 cannot cover the area where the first cover plate 101 is in contact with the first adhesive film 102. surface, or when the first adhesive film 102 can just completely cover the contact surface of the first cover plate 101 and the first adhesive film 102, the deformed or shrunk first adhesive film 102 may cause the contact between the first cover plate 101 and the first adhesive film 102. A cavity is formed between the two cover plates 105, and the formed cavity may not be filled in the subsequent lamination process, so that bubbles exist in the packaging film formed between the first cover plate 101 and the second cover plate 105, reducing the Reliability of photovoltaic curtain wall.

Therefore, when selecting the first adhesive film 102, an adhesive film with a size larger than the surface of the first cover plate 101 in contact with the first adhesive film 102 can be selected as the first adhesive film 102, and ensure a good first adhesive film. The distance between the edge of the film 102 and the edge of the first cover plate 101 is greater than 3mm. For example, the distance between the edge of the first adhesive film 102 and the edge of the first cover plate 101 is set to 3.5 mm, 5 mm, 7.5 mm, 10 mm, 12 mm or 15 mm. Wherein, the distance between the edge of the first adhesive film 102 and the edge of the first cover plate 101 refers to the distance between the first adhesive film 101 and the first adhesive film 102 along the direction parallel to the contact surface of the first cover plate 101 and the first adhesive film 102. The distance L1 between the outermost edge of the film 102 and the outermost edge of the first cover plate 101 .

By providing a surface that can completely cover the contact surface of the first cover plate 101 and the first adhesive film 102, and the distance between the edge of the first adhesive film 102 and the edge of the first cover plate 101 is greater than 3mm as the first adhesive film The film 102 minimizes the lack of glue or the unevenness of the glue film caused by the shrinkage and deformation of the glue film during the lamination process, and improves the quality of the formed packaging film and the reliability of the photovoltaic curtain wall.

In some embodiments, referring to FIG. 1 to FIG. 9 , in some embodiments, providing the second adhesive film 104 includes: providing a second adhesive film capable of completely covering the surface of the second cover plate 105 in contact with the second adhesive film 104 104, and the distance between the edge of the second adhesive film 104 and the edge of the second cover plate 105 is greater than 3 mm.

The distance between the edge of the second adhesive film 104 and the edge of the second cover plate 105 refers to that, in a direction parallel to the surface of the second cover plate 105 in contact with the second adhesive film 104 The distance L2 between the outermost edge and the outermost edge of the second cover plate 105 . Similar to the provision of the first adhesive film 102, if the size of the second adhesive film 104 is insufficient, there is a greater probability of air bubbles in the packaging film formed between the first cover plate 101 and the second cover plate 105 after lamination . Therefore, when providing the second adhesive film 104, select an adhesive film that can at least completely cover the surface of the second cover plate 105 in contact with the second adhesive film 104, and connect the edge of the second adhesive film 104 with the second cover plate The distance between the edges of 105 is controlled within a range larger than 3 mm. For example, the distance between the edge of the second adhesive film 104 and the edge of the second cover plate 105 is set to 3.5mm, 5mm, 7.5mm, 10mm, 12mm or 15mm, etc. The problem of lack of glue or uneven glue film caused by deformation can improve the quality of the formed packaging film and the reliability of the photovoltaic curtain wall. Since it is similar to the mechanism of providing the first adhesive film 102 , it will not be repeated here. FIG. 10 is a schematic diagram of the structure of the photovoltaic curtain wall before lamination by simultaneously providing the first adhesive film 102 larger in size than the first cover plate 101 and the second adhesive film 104 larger in size than the second cover plate 105 .

In some embodiments, it further includes: setting at least one bypass diode for the battery string 103 .

During the use of the photovoltaic curtain wall, some cells in the battery string 103 may be covered. At this time, the blocked cells cannot work, which will cause other normally working cells to be unable to output electric energy, thereby generating a large amount of heat. The battery string 103 and even the photovoltaic curtain wall are damaged.

Therefore, before the lamination process, at least one bypass diode can be provided for the battery string 103, and the bypass diode can be used as a backup electric energy output path. Conduct carrier transport, thereby improving the safety and service life of photovoltaic curtain walls.

The bypass diode can be connected to the battery string 103 through the outlet opening, and the bypass diode is arranged in the photovoltaic wire box. The photovoltaic wire box is used to ensure the insulation and safety of the bypass diode and the output wire, and can usually be arranged on the second cover 105 or the side corners of the photovoltaic curtain wall.

In addition, the number of bypass diodes can be set as required, and the battery string 103 is divided into multiple battery units each composed of at least one battery slice by using the bypass diodes. The bypass diodes are connected in parallel with one battery unit, and connected with the remaining battery units In series, the embodiment of the present application does not limit the specific number of bypass diodes provided.

Correspondingly, another embodiment of the present application provides a photovoltaic curtain wall, which is formed by the above photovoltaic curtain wall manufacturing method. The specific structure of the photovoltaic curtain wall can refer to FIG. Two cover plates 105 ; an encapsulation film 1004 , the encapsulation film 1004 is located between the first cover plate 101 and the second cover plate 105 and covers the battery string 103 .

Although the present application is disclosed as above with preferred embodiments, it is not used to limit the claims. Any person skilled in the art can make some possible changes and modifications without departing from the concept of the present application. Therefore, the present application The scope of protection shall be based on the scope defined by the claims of the present application.

Those of ordinary skill in the art can understand that the above-mentioned implementation modes are specific examples for realizing the present application, and in practical applications, various changes can be made to it in form and details without departing from the spirit and spirit of the present application. scope. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application should be determined by the scope defined in the claims.

Claims (11)

1. A method for producing a photovoltaic curtain wall, comprising: providing a first cover; providing a first adhesive film, and attaching the first adhesive film to the first cover plate; providing a battery string, the battery string has an opposite first surface and a second surface, and attaching the first surface of the battery string to the surface of the first adhesive film away from the first cover plate; providing a second adhesive film, attaching the second adhesive film to the second surface of the battery string; Provide a second cover plate, attach the second cover plate to the surface of the second adhesive film away from the battery string, and use a lamination process to form the photovoltaic curtain wall; Wherein, the thickness of the second cover plate is greater than or equal to the equivalent thickness, and the thickness of the first cover plate is smaller than the thickness of the second cover plate; The equivalent thickness is the thickness of the target cover plate that satisfies a preset condition, the material of the target cover plate is the same as that of the second cover plate, and the preset condition includes that the target cover plate is under a preset load. The cover plate produces a predetermined amount of bending deformation. 2. The photovoltaic curtain wall manufacturing method according to claim 1, further comprising: laying a third adhesive film between the first adhesive film and the second adhesive film, and the third adhesive film is For the edge of the second cover plate, and the edge of the second cover plate is not covered by the orthographic projection of the battery string on the second cover plate. 3. The photovoltaic curtain wall manufacturing method according to claim 2, characterized in that the width of the third adhesive film is greater than or equal to 10 mm. 4. The method for manufacturing a photovoltaic curtain wall according to claim 1, wherein the battery string includes a plurality of sub-battery strings arranged at intervals along the first direction, and the step of forming the photovoltaic curtain wall further comprises: A fourth adhesive film is laid between the target sub-battery strings, and the fourth adhesive film is attached to the first adhesive film and the second adhesive film respectively, wherein the target sub-battery string is the multi- Among sub-battery strings, adjacent sub-battery strings whose interval along the first direction is greater than or equal to a preset value. 5. The method for manufacturing a photovoltaic curtain wall according to claim 1, wherein the battery strings include output wires, and the step of forming the photovoltaic curtain wall further comprises: on the first cover plate or the second cover Outlet openings are provided on the board, and the outlet openings are used to lead out the output wires. 6. The photovoltaic curtain wall manufacturing method according to claim 5, wherein the first cover plate or the second cover plate includes a third surface adjacent to the battery string, and the step of making the photovoltaic curtain wall further comprises The method includes: providing a fifth adhesive film, the opening area on the third surface is located within the orthographic projection of the fifth adhesive film on the third surface. 7. The photovoltaic curtain wall manufacturing method according to claim 1, wherein said providing the first adhesive film comprises: providing the first adhesive film capable of completely covering the surface of the first cover plate in contact with the first adhesive film, and the distance between the edge of the first adhesive film and the edge of the first cover plate Greater than 3mm. 8. The photovoltaic curtain wall manufacturing method according to claim 1, wherein said providing the second adhesive film comprises: providing the second adhesive film capable of completely covering the surface of the second cover plate in contact with the second adhesive film, and the distance between the edge of the second adhesive film and the edge of the second cover plate Greater than 3mm. 9. The method for manufacturing a photovoltaic curtain wall according to claim 1, wherein the lamination process comprises: laminating with a laminator and/or an autoclave. 10. The photovoltaic curtain wall manufacturing method according to any one of claims 1 to 9, further comprising: providing at least one bypass diode for the battery string. 11. A photovoltaic curtain wall, characterized in that it is formed by the method for manufacturing a photovoltaic curtain wall according to any one of claims 1 to 10, comprising: The first cover plate, the battery string and the second cover plate are stacked in sequence; An encapsulation film, the encapsulation film is located between the first cover plate and the second cover plate, and covers the battery string.

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