A packaging adhesive film, a photovoltaic cell back sheet, and a photovoltaic cell module

Abstract

The application relates to a packaging adhesive film, a photovoltaic cell backboard and a photovoltaic cell assembly, and relates to the field of photovoltaic cells, which comprises an organic packaging layer and a black component, the black component comprises a plurality of black pieces, the plurality of black pieces are arranged in the organic packaging layer, the plurality of black pieces are arranged at intervals, the black pieces are arranged obliquely, and the projections of any two adjacent black pieces along a first direction contact or intersect, the first direction is the thickness direction of the organic packaging layer. The application has the effect of improving the power generation of the photovoltaic assembly by improving the reflectivity of the black component.

Description

Technical Field

[0001] This application relates to the field of photovoltaic cells, and in particular to an encapsulating film. Background Technology

[0002] Traditional crystalline silicon photovoltaic modules are primarily white, with a white backsheet or white encapsulant film on the back to increase light reflection. However, the white backsheet or encapsulant film differs significantly in color from the crystalline silicon cells, and the white light reflection causes some light pollution.

[0003] Some existing photovoltaic modules are required to be black. Summary of the Invention

[0004] This application provides an encapsulating film, a photovoltaic cell backsheet, and a photovoltaic cell module, including a black photovoltaic cell module that provides high power generation.

[0005] This application provides an encapsulating film, including an organic encapsulation layer and a black component. The black component includes a plurality of black parts located within the organic encapsulation layer. The plurality of black parts are arranged at intervals and are inclined. Any two adjacent black parts are in contact or intersecting along a first direction, where the first direction is the thickness direction of the organic encapsulation layer.

[0006] In the above technical solution, the arrangement of multiple black components enables the encapsulating film to present a black effect, meeting the design requirements. At the same time, the spacing between the multiple black components enables the encapsulating film to have excellent light reflectivity, which helps to improve the power generation of photovoltaic cell modules using this encapsulating film.

[0007] This application also provides a photovoltaic cell backsheet, including a polyethylene film layer and a black component; the black component includes a plurality of black parts located within the polyethylene film layer, the plurality of black parts being arranged at intervals, the black parts being inclined such that any two adjacent black parts are in contact or intersecting along a first direction, the first direction being the thickness direction of the polyethylene film layer.

[0008] In the above technical solution, the black photovoltaic cell backsheet has excellent light reflectivity.

[0009] This application also provides a photovoltaic cell backsheet, including glass and a black component; the black component includes a plurality of black parts, the plurality of black parts being located inside the glass or on the surface of the glass, the plurality of black parts being arranged at intervals, the black parts being inclined such that any two adjacent black parts are in contact or intersecting along a first direction, the first direction being the thickness direction of the polyethylene film layer.

[0010] In the above technical solution, the black photovoltaic cell backsheet has excellent light reflectivity.

[0011] This application also provides a photovoltaic cell module, including an encapsulating film and / or a photovoltaic cell backsheet.

[0012] In the above technical solution, the black photovoltaic cell module has a high power generation capacity. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a photovoltaic module;

[0014] Figure 2 This is a schematic diagram of a black component with a triangular cross-section located in an organic encapsulation layer in one embodiment;

[0015] Figure 3 This is a schematic diagram of the structure of a black component with a triangular cross-section in one embodiment;

[0016] Figure 4 This is a schematic diagram of a black component with a parallelogram-shaped cross-section located in an organic encapsulation layer in one embodiment.

[0017] Figure 5 This is a schematic diagram of the structure of a black component with a parallelogram-shaped cross-section in one embodiment;

[0018] Figure 6 This is a schematic diagram of the structure in one embodiment where the projections of two adjacent black components intersect along a first direction;

[0019] Figure 7 This is a schematic diagram of a structure in one embodiment where the angle of inclination of one of the inclined sidewalls of the black component is an obtuse angle.

[0020] 1. Backsheet; 2. Back film; 21. Organic encapsulation layer; 22. Black module; 221. Black component; 3. Solar cell; 4. Front film; 5. Glass. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present application will become clearer and more apparent.

[0022] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0023] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0024] This application discloses an encapsulating film for use in photovoltaic modules, as shown in the embodiments below. Figure 1 The diagram shows the basic structure of a photovoltaic module, which includes a backsheet 1, a back film 2, solar cells 3, a front film 4, and glass 5. The backsheet 1, back film 2, solar cells 3, front film 4, and glass 5 are stacked sequentially upwards along the thickness direction of the photovoltaic module.

[0025] Glass 5 and backplate 1 are used to protect battery cell 3, front adhesive film 4 is used to bond glass 5 and battery cell 3, and back adhesive film 2 is used to bond backplate 1 and battery cell 3.

[0026] Both the glass 5 and the front encapsulating film 4 are transparent structural components. Multiple solar cells 3 are laid flat, for example, there are 60 or 72 solar cells 3, multiple solar cells 3 are located on the same thickness layer, and multiple solar cells 3 are spaced apart.

[0027] For example, backsheet 1 is a TPT board or a TPE board. TPT is a polyvinyl fluoride composite film, composed of three layers of film: PVF (polyvinyl fluoride film), PET (polyester film), and PVF. TPE backsheet 1 is a thermoplastic elastomer, including block copolymers (styrene resins, copolyesters, polyurethanes, and polyamides), as well as thermoplastic elastomer blends and alloys (thermoplastic polyolefins and thermoplastic vulcanized rubber). Optionally, backsheet 1 is a glass plate.

[0028] For ease of description, a first direction is defined as the thickness direction of the photovoltaic module, which is also the thickness direction of the backsheet 1, the back film 2, the solar cell 3, the front film 4, and the glass 5 in the photovoltaic module. In the attached drawings, the first direction is represented as the X direction.

[0029] When the photovoltaic module is working, the light that shines on the photovoltaic module passes through the glass 5 and the front encapsulant film 4. Some of the light directly shines on the solar cell 3, and some of the light shines through the gap between any two adjacent solar cells 3 to shine on the back encapsulant film 2. The light shines on the solar cell 3 after being reflected by the back encapsulant film 2 or the back sheet 1.

[0030] Reference Figure 1 In black photovoltaic modules, the back film 2 or backsheet 1 is black. Compared to white film or backsheet 1, black film or backsheet 1 has a relatively low reflectivity to light and a relatively strong absorption of infrared light, resulting in a greater temperature rise in the photovoltaic module.

[0031] The higher the reflectivity of the back film 2 or the backsheet 1, the greater the light intensity received by the solar cell 3 under the same illumination, and the higher the utilization rate of light by the photovoltaic module.

[0032] The black module 22 has a stronger absorption of infrared light, which leads to a greater temperature increase in the photovoltaic module, which is 2 to 8°C higher than that of the white or colorless module. The module power is 1.5% to 5% lower than that of the white or colorless module.

[0033] The black film or backsheet 1 of the photovoltaic module absorbs heat, and the solar cell 3 generates heat during operation, causing the temperature of the solar cell 3 to rise. Due to the inherent characteristics of the solar cell 3, its conversion efficiency decreases as the temperature of the solar cell 3 increases.

[0034] To achieve a black film, carbon black can be added as a colorant; or infrared reflective pigments can be used as colorants, but the light reflectivity of the corresponding film will be relatively low.

[0035] Reference Figure 2 This application discloses an encapsulating film. The black encapsulating film has a high reflectivity. The encapsulating film includes an organic encapsulation layer 21 and a black component 22. The black component 22 includes a plurality of black parts 221. The plurality of black parts 221 are located within the organic encapsulation layer 21. The plurality of black parts 221 are arranged at intervals. The black parts 221 are inclined, and any two adjacent black parts 221 are in contact or intersecting along the projection of a first direction. The first direction is also the thickness direction of the organic encapsulation layer 21.

[0036] For ease of description, a second direction is defined as the spacing direction of the black parts 221. In the accompanying drawings, the second direction is represented as the Y direction.

[0037] Specifically, the organic encapsulation layer 21 is made of EVA (ethylene-vinyl acetate copolymer), POE (polyolefin elastomer), or PVB (polyvinyl butyral), and the organic encapsulation layer 21 is a transparent layer. The black part 221 is a strip-shaped part located within the organic encapsulation layer 21.

[0038] In this embodiment, any two adjacent black parts 221 are in contact with each other along the first direction.

[0039] Reference Figure 6 In another embodiment, the projections of any two adjacent black elements 221 along the first direction intersect.

[0040] Reference Figure 2 There is a gap between two adjacent black parts 221. Some of the light that shines on the encapsulating film can enter the gap between the two adjacent black parts 221 and be reflected on the surface of the black parts 221, thereby increasing the reflectivity of the encapsulating film.

[0041] Furthermore, the plurality of the black components 221 are uniformly distributed within the organic encapsulation layer 21.

[0042] Multiple black components 221 in the black component 22 are in contact or intersecting along the projection of the first direction, so that the encapsulating film appears black after being placed between the photovoltaic components, thus meeting the black design requirements of the encapsulating film.

[0043] The black component 22 is similar to a louver structure, ensuring that the surface of the encapsulating film is black and allowing light to pass through the gaps in the black component 221.

[0044] Compared to traditional black encapsulating films, the encapsulating film in this application has a higher reflectivity, thus improving the utilization of light.

[0045] Existing black encapsulant films absorb heat and cause rapid temperature rise. In this application, due to the microscopic distribution of the spacing between the black components 221, the heat dissipation speed of the black components 221 is accelerated, which slows down the temperature rise of the encapsulant film, reduces the operating temperature of the photovoltaic module, and can provide the power of the photovoltaic module.

[0046] Reference Figure 2 As an alternative, the black component 221 may be made of a non-conductive inorganic material. For example, the black component 221 may be a component made of a photoelectric functional ceramic material. Alternatively, the black component 221 may be a component made of photoelectric functional glass 5.

[0047] Using inorganic materials, rather than organic black fillers or pigments, avoids abnormal discoloration of the encapsulating film during long-term use. The inorganic material structure layer simultaneously satisfies the surface microstructure plasticity, making it less prone to deformation under the pressure of the backsheet 1 and solar cells 3 within the photovoltaic module, preventing the reduction or disappearance of the reflectivity enhancement effect due to structural deformation during lamination. The high reflectivity of the black infrared band also reduces the temperature rise of the encapsulating film.

[0048] Due to the differences between inorganic and organic materials, the migration of the black component 221 is very slow; moreover, due to the density and stability of inorganic materials, the migration speed is not affected by temperature. The black component 221 made of inorganic material does not easily migrate to the organic encapsulation layer 21, ensuring long-term uniformity and stability of color.

[0049] The organic encapsulation layer 21 is interwoven with multiple black components 221, all of which are embedded within the organic encapsulation layer 21. The overall adhesion of the organic encapsulation layer 21 is minimally affected by the black components 221, ensuring the overall adhesion of the encapsulation film and minimizing the impact on the long-term reliability of the photovoltaic module.

[0050] Reference Figure 2 As an alternative, the cross-section of the black part 221 is triangular.

[0051] When the cross-section of the black component 221 is triangular, in the accompanying drawings, the width of the base of the black component 221 parallel to the surface of the encapsulating film along the second direction is denoted as L, and the height of the black component 221 along the first direction is denoted as H. The minimum gap between two adjacent black components 221 along the second direction is denoted as s. The black component 221 has two inclined sides relative to the surface of the organic encapsulation layer 21, and the acute angle between one of the inclined sides and the surface of the organic encapsulation layer 21 is denoted as α.

[0052] It should be noted that, in this embodiment, the surface of the organic encapsulation layer 21 refers to either of the two surfaces of the organic encapsulation layer 21 thickness.

[0053] Reference Figure 4 As an optional embodiment, the black component 221 has a quadrilateral cross-section. For example, the black component 221 has a parallelogram cross-section. In the figures, the width of the bottom edge of the black component 221 parallel to the surface of the encapsulating film along the second direction is denoted as L, the height of the black component 221 along the first direction is denoted as D, the minimum gap between two adjacent black components 221 along the second direction is denoted as d, and the black component 221 has two inclined sides relative to the surface of the organic encapsulation layer 21, with one of the inclined sides forming an acute angle β with the surface of the organic encapsulation layer 21.

[0054] In this embodiment, a black component 221 with a triangular cross-section is selected. Compared with a black component 221 with a parallelogram cross-section, the black component 221 with a triangular cross-section has a larger effective area for light utilization and a higher light utilization rate.

[0055] As an alternative, at least one inclined surface of the black part 221 is provided with a pattern.

[0056] Reference Figure 3 When the cross-section of the black part 221 is triangular, for example, both inclined surfaces of the black part 221 are provided with patterns. Optionally, one of the inclined surfaces of the black part 221 is provided with a pattern.

[0057] Reference Figure 5 When the cross-section of the black part 221 is a parallelogram, for example, both inclined surfaces of the black part 221 are provided with patterns, and one of the two surfaces of the black part 221 that are parallel to the surface of the encapsulating film is provided with a pattern when connected to the back plate 1.

[0058] Optionally, one of the two inclined surfaces in the black part 221 is patterned.

[0059] Optionally, one of the two surfaces of the black part 221 that are parallel to the surface of the encapsulating film is provided with a pattern when connected to the back plate 1.

[0060] Patterns can be regular or irregular.

[0061] For example, regular patterns include triangular rectangular stripes or pyramidal matrix patterns. Regular patterns enable most of the light shining on the surface of the black part 221 to be reflected in a directional manner.

[0062] For example, the irregular pattern is an irregularly shaped triangle, square, or arc, which can be arranged regularly or randomly on the surface of the black part 221. The irregular pattern allows most of the light shining on the surface of the black part 221 to be diffused. The irregular pattern is easy to produce on the surface of the black part 221.

[0063] Reference Figure 2 When the cross-section of the black part 221 is triangular, the angle α, width L, height H, and minimum gap s are all related to the reflectivity of the encapsulating film, as explained below.

[0064] Reference Figure 1 As an alternative, at least one of the inclined sides has an inclination angle of 40°-50° or 135°-140°.

[0065] Of the three sides of the black component 221, one side is parallel to the surface of the organic encapsulation layer 21, while the other two sides are inclined relative to the surface of the organic encapsulation layer 21, forming an angle between the two inclined sides and the surface of the organic encapsulation layer 21. This application describes the angle of one inclined side, and the angle of the other inclined side is set accordingly. In the accompanying drawings, the angle between the inclined side and the surface of the organic encapsulation layer 21 described in this application is α, where α represents the inclination angle.

[0066] When the cross-section of the black part 221 is an obtuse triangle, for example, the tilt angle of the tilted side is 45°, that is, α is 45°; alternatively, the tilt angle of the tilted side is 40°, 41°, 43°, 46°, 47°, 49° or 50°.

[0067] Reference Figure 7 When the cross-section of the black part 221 is an acute triangle, for example, the tilt angle of the tilted side is 137°, that is, α is 137°; alternatively, the tilt angle of the tilted side is 135°, 136°, 138°, 139° or 140°.

[0068] Reference Figure 2As an optional embodiment, the maximum dimension of the black component 221 along the first direction is between 50 micrometers and 150 micrometers. For example, the height H of the black component 221 is 100 micrometers; alternatively, the maximum dimension of the black component 221 along the first direction is 50, 61, 72, 80, 88, 95, 102, 119, 120, 127, 135, 142, or 150 micrometers. It should be noted that in this embodiment, the dimension in the first direction is described as an integer micrometer; the actual dimension may have a decimal part.

[0069] The height of the black part 221 is not less than 50 micrometers, which enables the black part 221 to maintain its shape stability when the adhesive film flows, and it is not easy to deform or scatter.

[0070] The size of the organic encapsulation layer 21 along the first direction is between 200 micrometers and 600 micrometers. The thickness of the organic encapsulation layer 21 is determined according to the design requirements of the photovoltaic module. For example, the maximum size of the organic encapsulation layer 21 along the first direction is 400 micrometers; optionally, the maximum size of the organic encapsulation layer 21 along the first direction is 200, 244, 288, 320, 352, 380, 408, 476, 480, 508, 540, 568, or 600 micrometers.

[0071] Reference Figure 1 As an alternative, the maximum dimension of the black part 221 along the second direction is between 150 and 250 μm.

[0072] Specifically, the maximum dimension of the black part 221 along the second direction is the dimension L. For example, the dimension L is 200 micrometers; optionally, the dimension L is 150, 162, 186, 208, 234 or 250 micrometers.

[0073] The reflectivity first increases and then decreases with increasing L. Using appropriate specifications for the maximum dimension of the black part 221 along the second direction can improve the reflectivity of the encapsulating film.

[0074] Reference Figure 1 As an alternative, the minimum gap between two adjacent black parts 221 is between 5 and 50 μm.

[0075] Specifically, the minimum gap between two adjacent black parts 221 is the size of s. For example, the size of s is 30 micrometers; alternatively, the size of s is 5, 8, 12, 19, 27, 40, 43 or 50 micrometers.

[0076] The reflectivity first increases and then decreases with increasing s. Using appropriate specifications for the minimum gap between two adjacent black parts 221 can improve the reflectivity of the encapsulating film.

[0077] To verify the reflectivity of the encapsulating film on a black part 221 with a triangular cross-section under different heights H and tilt angles α, several samples were selected for experiments, and the experimental data are shown in the table below.

[0078]

[0079]

[0080]

[0081]

[0082]

[0083]

[0084]

[0085]

[0086] Based on the experimental data of any one of the samples 1-7, under the condition that other conditions remain unchanged, the reflectivity of the encapsulating film is highest when the tilt angle α is in the range of 40°-60° or 135°-140°.

[0087] The experimental data of samples 1-7 were compared across samples. Under the condition that other conditions remain unchanged, the reflectivity of the encapsulating film increased with the increase of the height H of the black part 221 with a triangular cross-section. However, after the height H increased to a certain extent, there was no obvious gain effect.

[0088] Reference Figure 5 When the cross-section of the black part 221 is a parallelogram, the width L and the minimum gap d are both related to the reflectivity of the encapsulating film, as explained below.

[0089] The black part 221 has four sides, which are parallel to each other in pairs. Of the two intersecting sides, one is parallel to the surface of the organic encapsulation layer 21, and the other is inclined relative to the surface of the organic encapsulation layer 21.

[0090] As an alternative, the maximum dimension of the black part 221 along the second direction is between 150 and 250 μm, and the second direction is the spacing direction of the plurality of black parts 221.

[0091] The maximum dimension of the black part 221 along the second direction is represented by the dimension L. For example, the dimension L is 200 micrometers; alternatively, the dimension L is 150, 159, 170, 183, 194, 205, 233 or 250 micrometers.

[0092] As an alternative, the minimum gap between two adjacent black parts 221 is between 5 and 50 μm.

[0093] The minimum gap between two adjacent black parts 221 along the second direction is represented by the dimension d, and the maximum dimension of the black part 221 along the second direction is represented by the dimension d. For example, the dimension d is 30 micrometers; alternatively, the dimension d is 5, 8, 12, 19, 27, 40, 43 or 50 micrometers.

[0094] To verify the reflectivity of the encapsulating film of a black part 221 with a parallelogram cross-section under different widths L and minimum gaps d, several samples were selected for experiments, and the experimental data are shown in the table below.

[0095]

[0096]

[0097]

[0098]

[0099]

[0100]

[0101]

[0102]

[0103] The experimental data of samples 8-14 were compared, especially the width L of the black part 221 with a parallelogram cross-section in sample 14 under the condition that other conditions remain unchanged. As the width L increases, the reflectivity of the encapsulating film increases.

[0104] The experimental data of samples 8-14 were compared, especially those of sample 8-10. Under the condition that other conditions remain unchanged, the reflectivity of the encapsulating film increased with the increase of the spacing d of the black part 221 with a parallelogram cross-section.

[0105] The above samples also confirm that, compared to typical black backsheets or black encapsulating films, the reflectivity is low, generally between 3-5%, directly affecting light utilization and reducing photovoltaic module power by approximately 2-5%. The encapsulating film in this application has a reflectivity reaching a maximum of 36%. It should be noted that under the same experimental conditions, the reflectivity of the encapsulating film in this application may exceed 36%, and the 36% reflectivity should not be construed as a limitation on the maximum reflectivity of the encapsulating film in this application.

[0106] This application also discloses a photovoltaic cell backsheet, including an organic film layer and a black component 22; the black component 22 includes a plurality of black parts 221, the plurality of black parts 221 being located within the organic film layer, the plurality of black parts 221 being arranged at intervals, the black parts 221 being inclined such that any two adjacent black parts 221 are in contact or intersecting along a first direction, the first direction being the thickness direction of the organic film layer.

[0107] Specifically, the organic film layer includes any one, two, or three of polypropylene, polyethylene, or polypropylene. For example, the organic film layer is a polyethylene film layer. A polyethylene film layer is disposed on the surface facing the battery cell 3 of both surfaces of the backsheet 1, and the black component 22 is located within the polyethylene film layer.

[0108] The backsheet 1 is black, enabling the photovoltaic module surface to be black. Increasing the reflectivity of the black backsheet 1 improves the photovoltaic module power; however, because there is an encapsulating film between the backsheet 1 and the solar cell 3, some light shining on the backsheet 1 is reflected back to the back of the solar cell 3, thus reducing light utilization. Since the encapsulating film is closer to the solar cell 3 than the backsheet 1, it reduces light loss during propagation. Therefore, placing the black module 22 on the backsheet 1 reduces light utilization compared to placing it on the encapsulating film; however, compared to existing black photovoltaic modules, the black backsheet 1 in this application still has a higher light utilization rate.

[0109] This application also discloses a photovoltaic cell backsheet, including glass and a black component 22; the black component 22 includes a plurality of black parts 221, the plurality of black parts 221 being located inside the glass or on the surface of the glass, the plurality of black parts 221 being arranged at intervals, the black parts 221 being inclined such that any two adjacent black parts 221 are in contact or intersecting along a first direction, the first direction being the thickness direction of the glass.

[0110] It should be noted that the glass in the photovoltaic cell backsheet has a different meaning from the glass in Figure 5. The glass in the photovoltaic cell backsheet refers to the glass that is part of the backsheet of the photovoltaic cell.

[0111] Specifically, when the photovoltaic module is a double-glass photovoltaic module, that is, the backsheet 1 of the photovoltaic module is glass. The black component 22 can be embedded in the glass or it can be deposited on the glass surface in the form of a coating. The black component 22 can be set on both surfaces in the thickness direction of the glass. In this embodiment, the black component 22 is set on the surface of the glass facing the solar cell 3.

[0112] This application also discloses a photovoltaic cell module, including an encapsulating film and / or a photovoltaic cell backsheet.

[0113] For example, the photovoltaic cell module uses an encapsulating film as the back film; optionally, the photovoltaic cell module uses a photovoltaic cell backsheet as the backsheet, or the photovoltaic cell module uses an encapsulating film as the back film and a photovoltaic cell backsheet as the backsheet.

[0114] In the description of this application, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship in the working state of this application. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0115] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0116] The present application has been described above with reference to preferred embodiments; however, these embodiments are merely exemplary and illustrative. Various substitutions and modifications can be made to the present application based on these embodiments, all of which fall within the protection scope of the present application.

Claims

1. An encapsulating film, characterized in that, Including organic encapsulation layer and black components; The black component includes multiple black parts located within the organic encapsulation layer. The multiple black parts are arranged at intervals and are inclined. Any two adjacent black parts are in contact or intersecting along a first direction, which is the thickness direction of the organic encapsulation layer.

2. The encapsulating film according to claim 1, characterized in that, The black component is made of a non-conductive inorganic material.

3. The encapsulating film according to claim 1, characterized in that, The black part has at least one inclined surface with a pattern.

4. The encapsulating film according to any one of claims 1-3, characterized in that, The cross-section of the black component is triangular.

5. The encapsulating film according to claim 4, characterized in that, The black component has a tilted side that is inclined relative to the surface of the organic encapsulation layer, and at least one of the tilted sides has a tilt angle of 40°-50° or 135°-140°.

6. The encapsulating film according to claim 4, characterized in that, The maximum dimension of the black part along the first direction is between 50 micrometers and 150 micrometers.

7. The encapsulating film according to claim 4, characterized in that, The maximum dimension of the black component along the second direction is between 150 and 250 μm, and the second direction is the spacing direction of the plurality of black components.

8. The encapsulating film according to claim 4, characterized in that, The minimum gap between two adjacent black parts is between 5 and 50 μm.

9. The encapsulating film according to any one of claims 1-3, characterized in that, The black component has a quadrilateral cross-section.

10. The encapsulating film according to claim 9, characterized in that, The maximum dimension of the black component along the second direction is between 150 and 250 μm, and the second direction is the spacing direction of the plurality of black components.

11. The encapsulating film according to claim 9, characterized in that, The minimum gap between two adjacent black parts is between 5 and 50 μm.

12. A photovoltaic cell backsheet, characterized in that, Including organic film layers and black components; The black component includes multiple black parts located within the organic film layer. The multiple black parts are arranged at intervals and are tilted such that any two adjacent black parts are in contact or intersecting along a first direction, where the first direction is the thickness direction of the organic film layer.

13. A photovoltaic cell backsheet, characterized in that, Including glass and black components; The black component includes multiple black parts located inside or on the surface of the glass. The multiple black parts are arranged at intervals and are tilted such that the projections of any two adjacent black parts along a first direction, which is the thickness direction of the glass.

14. A photovoltaic cell module, characterized in that, Includes the encapsulating film according to any one of claims 1-11 and / or the photovoltaic cell backsheet according to any one of claims 12-13.

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