Packaging adhesive film with dark color ribbon and dark color photovoltaic module

Abstract

The utility model discloses a packaging adhesive film with a dark color ribbon and a dark color photovoltaic assembly, and belongs to the technical field of solar photovoltaic assemblies. The packaging adhesive film comprises a transparent adhesive film layer, a non-woven fabric layer and a reflective adhesive film layer which are stacked, the non-woven fabric layer is provided with a plurality of dark color ribbons, and the dark color ribbons at least partially or completely cover gaps between adjacent battery pieces and non-overlapped parts of battery piece layers and photovoltaic glass. On the basis of forming the dark color ribbon in the packaging adhesive film, the problems that in the prior art, the processing process of forming the black grid on the back plate through a coloring agent is complex, and the coloring agent is prone to migration are solved, so that aging of the dark color ribbon can be reduced, and the processing process is simplified.

Description

Technical Field

[0001] The utility model belongs to the technical field of solar photovoltaic components, and in particular relates to a packaging adhesive film with a dark color band and a dark photovoltaic component. Background Art

[0002] With the development of photovoltaic power generation technology, photovoltaic modules have been widely used in the construction field. From the perspective of color, black photovoltaic modules can better meet the appearance requirements of buildings.

[0003] In order to take into account both the black appearance and high photoelectric conversion efficiency of the module, in the prior art, a dye is usually used to form a black grid on the back panel, and the black grid is used to cover the gaps between the cells of the photovoltaic module and the edges between the cells and the photovoltaic glass, thereby making a black photovoltaic module.

[0004] However, on the one hand, since the backplane is located on the surface of the photovoltaic module, the dye in the black grid is prone to migrate during the service of the photovoltaic module, causing the color to become lighter; on the other hand, the black grid is formed by the dye, and the processing process is complicated, thereby reducing the production efficiency of the entire photovoltaic module. Utility Model Content

[0005] In view of the above analysis, the utility model aims to provide a packaging film with a dark color band and a dark photovoltaic module, which solves the problems in the prior art of using dyes to form a black grid on the backplane, such as the complex processing process and easy migration of the dyes.

[0006] The purpose of this utility model is mainly achieved through the following technical solutions:

[0007] The utility model provides a packaging film with dark color bands, which is used for dark photovoltaic modules. The dark photovoltaic modules include stacked photovoltaic glass and battery cell layers, and the battery cell layers include multiple battery cells. The packaging film includes stacked transparent film layers, non-woven fabric layers and reflective film layers, and multiple dark color bands are arranged on the non-woven fabric layer. The dark color bands at least partially or completely cover the gaps between adjacent battery cells and the non-overlapping parts of the battery cell layer and the photovoltaic glass.

[0008] Optionally, the dark color ribbon is a black color ribbon, a dark blue color ribbon or a dark gray color ribbon.

[0009] Optionally, two adjacent battery cells have a gap; the dark color band includes multiple transverse color bands and multiple longitudinal color bands, and the transverse color bands and the longitudinal color bands form a mesh structure; the transverse color band covers the gap between two longitudinally adjacent battery cells, and the longitudinal color band covers the gap between two transversely adjacent battery cells; or, two transversely adjacent battery cells have a gap, and two longitudinally adjacent battery cells do not have a gap; the dark color band only includes multiple longitudinal color bands, and the longitudinal color band covers the gap between two transversely adjacent battery cells.

[0010] Optionally, among the multiple dark color bands, the dark color band corresponding to the gap position between adjacent cell cells is the gap color band, and the dark color band corresponding to the portion where the cell layer and the photovoltaic glass do not overlap is the edge color band; the width of the gap color band is greater than the width of the gap between adjacent cell cells, and the width of the edge color band is greater than the width of the portion where the cell layer and the photovoltaic glass do not overlap.

[0011] Optionally, the difference between the width of the gap color band and the width of the gap between adjacent solar cells is 2 to 5 mm, and the difference between the width of the edge color band and the width of the non-overlapping portion of the solar cell layer and the photovoltaic glass is 2 to 5 mm.

[0012] Optionally, the width of the dark color band is 5 to 10 mm.

[0013] Optionally, the thickness of the transparent adhesive film layer is 250-400 μm; and / or the thickness of the non-woven fabric layer is 10-20 μm; and / or the thickness of the reflective adhesive film layer is 250-400 μm.

[0014] Optionally, reflective particles are provided in the reflective adhesive film layer.

[0015] Optionally, the packaging film has a thickness of 400-800 μm.

[0016] The utility model also provides a dark-colored photovoltaic component, comprising a first packaging layer, a second packaging layer and a substrate, wherein the photovoltaic glass, the first packaging layer, the battery layer, the second packaging layer and the substrate are stacked in sequence, and the second packaging layer is formed by the above-mentioned packaging film.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0018] A) The encapsulating film with a dark color band provided by the utility model forms a dark color band on the non-woven fabric layer of the encapsulating film, and the dark color band at least partially covers the gap between adjacent battery cells and the non-overlapping part of the battery cell layer and the photovoltaic glass, thereby forming a dark-colored dark photovoltaic module to better match the building. At the same time, because the encapsulating film is located inside the dark photovoltaic module rather than on the surface, the aging of the dark color band can be reduced.

[0019] B) The packaging film with dark color bands provided by the utility model has a simple operation and high process efficiency in forming the dark color bands.

[0020] Other features and advantages of the utility model will be described in the following description, and some will become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures specifically pointed out in the written description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are only used for illustrating the specific utility model and are not considered to be limiting of the present utility model. In the entire drawings, the same reference symbols represent the same components.

[0022] Figure 1 A schematic structural diagram of a packaging adhesive film with a dark color band provided in the first embodiment of the utility model;

[0023] Figure 2 A schematic diagram of one structure of a non-woven fabric layer in a packaging film with a dark color band provided in Example 1 of the utility model;

[0024] Figure 3 Another schematic diagram of the structure of the non-woven fabric layer in the packaging film with a dark color band provided in the first embodiment of the utility model;

[0025] Figure 4 This is a schematic structural diagram of a dark-colored photovoltaic module provided in Embodiment 2 of the present utility model.

[0026] Reference numerals:

[0027] 1-transparent adhesive film layer; 2-non-woven fabric layer; 201-transverse color band; 202-vertical color band; 3-reflective adhesive film layer; 4-photovoltaic glass; 5-first encapsulation layer; 6-cell layer; 7-second encapsulation layer; 8-substrate. DETAILED DESCRIPTION

[0028] The preferred embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the present invention to explain the principle of the present invention.

[0029] Embodiment 1

[0030] This embodiment provides a packaging film with a dark color band, which is used for a dark photovoltaic module. The dark photovoltaic module includes a laminated photovoltaic glass and a battery layer, and the battery layer includes a plurality of battery cells. The structure of the packaging film is shown in FIG. Figure 1 , including a transparent adhesive film layer 1, a non-woven fabric layer 2 and a reflective adhesive film layer 3 stacked in sequence from bottom to top, a plurality of dark color bands are arranged on the non-woven fabric layer 2, and the dark color bands at least partially or completely cover the gaps between adjacent battery cells and the non-overlapping parts of the battery cell layer and the photovoltaic glass.

[0031] The transparent adhesive film layer 1 and the reflective adhesive film layer 3 are both made of ethylene-vinyl acetate copolymer (EVA), that is, the transparent adhesive film layer 1 is a transparent EVA adhesive film layer, and the reflective adhesive film layer 3 is a reflective EVA adhesive film layer.

[0032] It should be noted that, since the color of the battery cell is dark blue, in order to better match the color of the battery cell, the dark color band is a black color band, a dark blue color band or a dark gray color band.

[0033] Compared with the prior art, the encapsulation film with a dark color band provided in this embodiment can be used for the encapsulation of dark photovoltaic modules. On the one hand, a dark color band is formed on the non-woven fabric layer 2 of the encapsulation film, and the dark color band at least partially covers the gap between adjacent cells and the non-overlapping part of the cell layer and the photovoltaic glass, so that a dark photovoltaic module with a dark color can be formed, which better matches the building. At the same time, since the encapsulation film is located inside the dark photovoltaic module, rather than on the surface, the aging of the dark color band can be reduced; on the other hand, the above-mentioned dark color band can be formed by printing with a dark dye (for example, carbon black dye, etc.), or directly formed during the weaving process of the non-woven fabric layer 2. The formation process of the dark color band is simple to operate and has high process efficiency.

[0034] Considering the different arrangements of the cells, for a conventional dark photovoltaic module, two adjacent cells (vertically adjacent and transversely adjacent) have a gap, and accordingly, the dark color band includes a plurality of transverse color bands 201 and a plurality of longitudinal color bands 202, and the transverse color bands 201 and the longitudinal color bands 202 form a mesh structure, see Figure 2 A plurality of transverse color bands 201 are arranged in parallel, and a plurality of longitudinal color bands 202 are arranged in parallel. The transverse color bands 201 cover the gap between two longitudinally adjacent battery cells, and the longitudinal color bands 202 cover the gap between two transversely adjacent battery cells.

[0035] For a zero-gap module, since there is no gap between two vertically adjacent cells, the dark color bands only include a plurality of longitudinal color bands 202, and the plurality of longitudinal color bands 202 are arranged in parallel. Figure 3 , the gap between two laterally adjacent battery cells is covered by the longitudinal color band 202 .

[0036] In order to better cover the gaps between adjacent cell cells and the non-overlapping parts of the cell layer and the photovoltaic glass, among the multiple dark color bands, the dark color bands corresponding to the gap positions between adjacent cell cells are gap color bands, and the dark color bands corresponding to the non-overlapping parts of the cell layer and the photovoltaic glass are edge color bands. The difference between the width of the gap color band and the width of the gap between adjacent cell cells is 2 to 5 mm, and the difference between the width of the edge color band and the width of the non-overlapping part of the cell layer and the photovoltaic glass is 2 to 5 mm.

[0037] Exemplarily, the width of the dark color band is 5 to 10 mm, and the thickness of the non-woven fabric layer 2 is 10 to 20 μm.

[0038] In order to ensure sufficient light transmittance, the transparent adhesive film layer 1 has a thickness of 250-400 μm and a light transmittance of ≥91%.

[0039] For the reflective film layer 3, in order to further reduce the optical loss of the dark photovoltaic module, reflective particles (for example, titanium dioxide particles) are provided in the reflective film layer 3. In this way, through the provision of reflective particles, micro-structure reflection is formed in the dark color band, which further reduces the optical loss and improves the power and conversion efficiency of the dark photovoltaic module. In practical applications, compared with the dark photovoltaic module without adding reflective particles, the power of the dark photovoltaic module with adding reflective particles can be increased by more than 5W.

[0040] Considering that the reflective adhesive film layer 3 will affect the reflectivity and resistance to potential induced degradation (ie, resistance to PID) of the dark-colored photovoltaic module, the thickness of the reflective adhesive film layer 3 is 250-400 μm.

[0041] In order to effectively protect the battery cell layer, the thickness of the packaging film with the dark color band is 400-800 μm.

[0042] Embodiment 2

[0043] This embodiment provides a dark photovoltaic module. Figure 4 , including a first encapsulation layer 5, a second encapsulation layer 7 and a substrate 8 (for example, a photovoltaic backplane or a glass backplane), the photovoltaic glass 4, the first encapsulation layer 5, the battery layer 6, the second encapsulation layer 7 and the substrate 8 are stacked in sequence from bottom to top, and the second encapsulation layer 7 is formed by the encapsulation film provided in Example 1.

[0044] In this embodiment, the transparent adhesive film layer 1 of the packaging adhesive film having the dark color band faces the battery cell layer 6 .

[0045] It should be noted that during the lamination process, the transparent adhesive film layer 1 and the reflective adhesive film layer 3 will penetrate into the gaps in the non-woven fabric layer 2 under the action of pressure. At the same time, the molecular chains in the transparent adhesive film layer 1 and the reflective adhesive film layer 3 will be cross-linked, so that the transparent adhesive film layer 1, the reflective adhesive film layer 3 and the non-woven fabric layer 2 form an integral structure, so that the second encapsulation layer 7 formed by the encapsulation film in the conventional lamination process can effectively reduce the occurrence of stratification of the encapsulation film with dark color bands.

[0046] Compared with the prior art, the beneficial effects of the dark-colored photovoltaic module provided in this embodiment are substantially the same as the beneficial effects of the encapsulation film with a dark-colored band provided in the first embodiment, and are not described in detail here.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A packaging film with a dark color band, used for a dark photovoltaic module, wherein the dark photovoltaic module comprises a laminated photovoltaic glass and a cell layer, wherein the cell layer comprises a plurality of cells; It is characterized in that The packaging film includes a stacked transparent film layer, a non-woven fabric layer and a reflective film layer, and a plurality of dark color bands are arranged on the non-woven fabric layer, and the dark color bands at least partially or completely cover the gaps between adjacent battery cells and the non-overlapping parts of the battery cell layer and the photovoltaic glass.

2. The packaging adhesive film with a dark color band according to claim 1, characterized in that: The dark color band is a black color band, a dark blue color band, or a dark gray color band.

3. The packaging adhesive film with a dark color band according to claim 1, characterized in that: Each of the two adjacent battery cells has a gap; the dark color band includes a plurality of transverse color bands and a plurality of longitudinal color bands, and the transverse color bands and the longitudinal color bands form a mesh structure; the transverse color band covers the gap between the two longitudinally adjacent battery cells, and the longitudinal color band covers the gap between the two transversely adjacent battery cells; Alternatively, two of the battery cells adjacent to each other in the transverse direction have a gap, and two of the battery cells adjacent to each other in the longitudinal direction do not have a gap; the dark color band only includes a plurality of longitudinal color bands, and the longitudinal color bands cover the gap between two of the battery cells adjacent to each other in the transverse direction.

4. The packaging adhesive film with a dark color band according to claim 1, characterized in that: Among the multiple dark color bands, the dark color band corresponding to the gap position between adjacent solar cells is the gap color band, and the dark color band corresponding to the part of the position where the solar cell layer and the photovoltaic glass do not overlap is the edge color band; The width of the gap color band is greater than the gap width between adjacent battery cells, and the width of the edge color band is greater than the width of the non-overlapping portion of the battery cell layer and the photovoltaic glass.

5. The packaging adhesive film with a dark color band according to claim 4, characterized in that: The difference between the width of the gap color band and the gap width between adjacent solar cells is 2 to 5 mm, and the difference between the width of the edge color band and the width of the non-overlapping portion of the solar cell layer and the photovoltaic glass is 2 to 5 mm.

6. The packaging adhesive film with a dark color band according to claim 1, characterized in that: The width of the dark color band is 5 to 10 mm.

7. The packaging adhesive film with a dark color band according to claim 1, characterized in that: The thickness of the transparent adhesive film layer is 250-400 μm; And / or, the thickness of the non-woven fabric layer is 10 to 20 μm; And / or, the thickness of the reflective adhesive film layer is 250-400 μm.

8. The packaging adhesive film with a dark color band according to claim 1, characterized in that: The reflective adhesive film layer is provided with reflective particles.

9. The packaging adhesive film with a dark color band according to claim 1, characterized in that: The thickness of the packaging film is 400-800 μm.

10. A dark photovoltaic module, characterized in that: It comprises a first encapsulation layer, a second encapsulation layer and a substrate, wherein the photovoltaic glass, the first encapsulation layer, the battery layer, the second encapsulation layer and the substrate are stacked in sequence, and the second encapsulation layer is formed by the encapsulation film according to any one of claims 1 to 9.

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