Black photovoltaic module

Abstract

The utility model provides a black photovoltaic module which is characterized in that the photovoltaic module at least comprises a first element with a black area and a battery piece, and a black fiber layer is further arranged on the black area of the first element. According to the black photovoltaic module, the background of the non-battery coverage area is the low-reflection black fiber layer, and it is guaranteed that the background is consistent with the appearance of the battery piece.

Description

Technical Field

[0001] The present application relates to the photovoltaic field, and in particular to a solar cell module, and in particular to a black photovoltaic module. Background Art

[0002] As a form of distributed photovoltaic modules, all-black modules meet some special requirements for appearance. In sharp contrast to the blue monocrystalline cells, white backplanes and metal frames of traditional solar modules, all-black modules, with their aesthetic advantages, meet the current market's requirements for the appearance of photovoltaic modules. Currently, all-black modules on the market are made of black grid glazed glass or black high-reflective grid back glass. Although they are all black, their reflectivity is higher than that of the cells, resulting in a large difference in color between the background area and the cells between the cells. The uneven black appearance of the module can be observed through the outline of the cells, which is far from meeting the needs of the market. Utility Model Content

[0003] Although some black components have been proposed in the prior art, the structure used in the prior art cannot guarantee that the color difference of the final product is small.

[0004] In view of the above problems, the present application is intended to improve the problems involved in the above prior art. The present application provides the following solutions:

[0005] The present application provides a black photovoltaic module, the photovoltaic module at least comprising: a first element having a black area, and a cell, wherein a black fiber layer is further arranged on the black area of ​​the first element. The present application further introduces a black fiber layer on the first element having a black area, thereby ensuring that the background and the cell have the same appearance, and can provide a completely black photovoltaic module with excellent appearance.

[0006] In some embodiments, the first element is a black mesh backplane, and the photovoltaic module includes, from the light-receiving surface to the backlight surface: a front plate; a first adhesive film layer; a solar cell sheet layer; a second adhesive film layer; a black fiber layer; and a black mesh backplane; or

[0007] The first element is a full black backplane, and the photovoltaic module comprises, in the direction from the light-receiving surface to the backlight surface: a front plate; a first adhesive film layer; a solar cell sheet layer; a second adhesive film layer; a black fiber layer; and a full black backplane; or

[0008] The first element is a black film, and the photovoltaic module includes, from the light-receiving surface to the backlight surface: a front plate; a first adhesive film layer; a solar cell sheet layer; a second adhesive film layer; a black fiber layer; a black film; a third adhesive film layer; and a back plate.

[0009] The present application introduces a black flocking fiber layer on the black area of ​​the black grid glaze glass, on the film surface of the black backplane, or on the black surface of the black PET film, so as to further reduce the difference and reflectivity between the color L value of the specular regular reflection light (SCI) and the color L value of the specular regular reflection light excluded (SCE), thereby ensuring that the background and the battery cell appearance are consistent, and improving the all-black appearance for various battery forms.

[0010] In some embodiments, the photovoltaic module further comprises a second element having a black area, the second element being a bus bar and / or a welding strip, and a black fiber layer is further disposed on the black area of ​​the second element. Introducing the black fiber layer on the black surface of the black bus bar can further ensure that the background is consistent with the appearance of the cell, and further improve the black appearance of the local area of ​​the photovoltaic module.

[0011] In some embodiments, the black fiber layer is a black flocking fiber layer. The black flocking fiber layer has a simple structure and is easy to prepare, and can be conveniently formed in the required area of ​​the existing black photovoltaic module to improve the overall or partial black appearance.

[0012] In some embodiments, the black fiber layer is a black polyester fiber layer, a black polyamide fiber layer, a black polyimide fiber layer, or a black carbon fiber layer.

[0013] In some embodiments, the reflectivity of the black fiber layer is 0.8% to 3%, and more preferably 1.0% to 1.8%. The black fiber layer has a lower reflectivity, ensuring that the background and the cell have the same appearance.

[0014] In some embodiments, the difference between the L value of the black fiber layer including specular regular reflection light (SCI) and the L value of the color excluding specular regular reflection light (SCE) based on the Lab color space is less than 5%, and preferably, the L value of the color including specular regular reflection light (SCI) is 5 to 20, the a value is -1 to 8, and the b value is -5 to 2.

[0015] In some embodiments, the front plate is selected from a glass front plate; or

[0016] The back panel is a glass back panel or a CPC back panel; or

[0017] The first adhesive film layer or the second adhesive film layer is selected from EVA film or POE film; or

[0018] The black film is a black PET film.

[0019] In some embodiments, the bus bar and / or welding ribbon is a black bus bar and / or welding ribbon, and a black fiber layer is further provided on the black bus bar and / or welding ribbon; or

[0020] A black tape is arranged on the bus bar and / or the welding tape, and a black fiber layer is further arranged on the black tape.

[0021] In some embodiments, the solar cell layer includes a plurality of back-contact cells; the plurality of back-contact cells are connected via welding strips to form a plurality of cell strings, and the plurality of cell strings are connected via bus bars to form the solar cell layer.

[0022] Utility Model Effect

[0023] Usually, the reflectivity of a cell in the visible light range is less than 1.5%. The component of the present application has a low-reflective black fiber layer in the background of the non-cell-covered area to ensure that the background is consistent with the appearance of the cell. The reflectivity of the black fiber layer can reach 0.8% to 3%, or even 1.0% to 1.8%.

[0024] The present application introduces a black flocking fiber layer on the black area of ​​the black grid glaze glass, the film surface of the black backplane, the black surface of the black bus bar and / or the black surface of the black PET film, thereby further reducing the difference in color L value including specular regular reflection light (SCI) and color L value excluding specular regular reflection light (SCE) and the reflectivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of a black photovoltaic double-glass module of the present application;

[0026] Figure 2 This is a schematic diagram of the structure of a black photovoltaic double-glass module of the present application;

[0027] Figure 3 This is a schematic diagram of the structure of a black photovoltaic single-glass component of the present application;

[0028] 1: front panel; 2: first adhesive film layer; 3: solar cell layer; 4: second adhesive film layer; 5: black fiber layer; 6: black mesh back panel; 7: black PET film or black film; 8: third adhesive film layer; 9: all-black back panel or CPC back panel; 10: back panel. DETAILED DESCRIPTION

[0029] The following embodiments of the present application are only used to illustrate the specific embodiments of the present application, and these embodiments cannot be understood as limiting the present application. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present application are deemed to be equivalent replacement methods and fall within the scope of protection of the present application.

[0030] The specific embodiments of the present application will be described in more detail below. However, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present application and to enable the scope of the present application to be fully communicated to those skilled in the art.

[0031] It should be noted that certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that technicians may use different nouns to refer to the same component. This specification and claims do not use the difference in nouns as a way to distinguish components, but use the difference in the functions of the components as the criterion for distinction. As mentioned throughout the specification and claims, "including" or "comprising" is an open term, so it should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred embodiment of the implementation of the present application, but the description is based on the general principles of the specification and is not used to limit the scope of the present application. The scope of protection of the present application shall be determined by the attached claims.

[0032] As used in this specification, "a" or "an" may mean one or more. As used in the claims, when used with the word "comprising", the word "a" or "an" may mean one or more than one.

[0033] The term "or" is used in the claims to mean "and / or" unless explicitly stated to refer only to alternatives or the alternatives are mutually exclusive, although the present disclosure supports a definition referring only to alternatives and "and / or." As used herein, "another" may mean at least a second or more.

[0034] The applicant has found that the all-black components currently on the market are made of black grid glazed glass or black high-reflective grid back glass. Although they are all black, their reflectivity (3.8% to 8%) is higher than the reflectivity of the cell (0.6% to 1.5%), resulting in a large difference in color between the background area and the cell between the cells. The uneven black appearance of the component can be observed through the outline of the cell, which is far from meeting the market demand.

[0035] The present application provides a black photovoltaic module, which at least includes: a first element having a black area, and a cell, and a black fiber layer is further arranged on the black area of ​​the first element. In the present application, there is no limitation on the first element, as long as it is an element having a black area that needs to display black. In the present application, the first element can be a black grid backplane, a full black backplane, or a black film based on the different structural forms of the photovoltaic module.

[0036] In the present application, the black fiber layer is a layer structure disposed on the black region of the first element, forming a light-receiving surface of the portion of the first element that appears black, thereby further improving the black appearance of the first element.

[0037] In some embodiments of the present application, the photovoltaic module further includes a second element having a black area, the second element is a bus bar and / or a welding strip, and a black fiber layer is further provided on the black area of ​​the second element. In the present application, there is no limitation on the second element, as long as it is a local element having a black area that needs to display black, and in the present application, the second element is a bus bar or a welding strip.

[0038] In a specific embodiment, the second element is a black bus bar and / or a welding ribbon, and a black fiber layer is further disposed on the black bus bar and / or the welding ribbon.

[0039] In some embodiments of the present application, a black tape is provided on the bus bar and / or the welding tape, and a black fiber layer is further provided on the black tape.

[0040] In the present application, the black fiber layer is a layer structure disposed on the black region of the second element, forming a light receiving surface of a portion of the second element that appears black, thereby further improving the black appearance of the second element.

[0041] In some embodiments of the present application, the black fiber layer is a black flocking fiber layer.

[0042] In some embodiments of the present application, the black fiber layer is a black polyester fiber layer, a black polyamide fiber layer, a black polyimide fiber layer or a black carbon fiber layer.

[0043] In the present application, there is no limitation on the source and preparation method of the black fiber layer, as long as it meets the requirements. For example, the black fiber layer is a black flocking fiber layer.

[0044] In some embodiments of the present application, the reflectivity of the black fiber layer is 0.8% to 3%, more preferably 1.0% to 1.8%. For example, the reflectivity of the black fiber layer can be 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, 3.0% or any range therebetween.

[0045] In some embodiments of the present application, the difference between the color L value of the black fiber layer including specular regular reflection light (SCI) and the color L value of the black fiber layer excluding specular regular reflection light (SCE) based on the Lab color space is less than 5%.

[0046] CIE is the abbreviation of Commission internationale de l'Eclairage, which refers to the International Commission on Illumination. CIELAB display color is an equal color space recommended in 1976 to measure color differences caused by differences in perception and equipment, and is specified in JIS Z 8781 (2013). The three coordinates of CIELAB are represented by L value, a value, and b value. The L value represents lightness and is expressed in 0 to 100. When the L value is 0, it means black, and when the L value is 100, it means diffuse white. The a value represents the color between red and green. If the a value is negative, it means that the color is close to green, and if it is positive, it means that the color is close to red. The b value represents the color between yellow and blue. If b is negative, it means that the color is close to blue, and if it is positive, it means that the color is close to yellow.

[0047] The lower limit of the L value (blackness) is not particularly limited, but the lower the better from the perspective of requiring a darker appearance. By adjusting the L value within the above range, the blackness is high, the blackness is more obvious, and the design is excellent, so even if it is set in a position visible to the user, a higher appearance quality can be maintained.

[0048] The diffuse illumination system is also divided into SCI (Specular Component Include) and SCE (Specular Component Exclude) according to the different processing methods of the regular reflection components using the light trap. In SCI, the regular reflection components based on the sample are also fully integrated. On the other hand, in SCE, the regular reflection components are removed by the light trap set on the wall of the integrating sphere, so the diffuse reflection components are measured.

[0049] The SCE color L value is the lightness L value expressed by the SCE method. The SCE method is a method of removing the regular reflection light, that is, a method of measuring the color by removing the regular reflection light. The definition of the SCE method is stipulated in JISZ 8722 (2009). Since the SCE method measures by removing the regular reflection light, the color is close to the color actually seen by the human eye.

[0050] In some embodiments of the present application, the L value of the specular regular reflection light (SCI) color is 5 to 20, the a value is -1 to 8, and the b value is -5 to 2. For example, the L value can be 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 or any range therebetween; for example, the a value can be -1, 0, 1, 2, 3, 4, 5, 6, 7, 8 or any range therebetween; for example, the b value can be -5, -4, -3, -2, -1, 0, 1, 2 or any range therebetween.

[0051] In the present application, there is no limitation on the measurement of the reflectance including specular regular reflection light (SCI) and the reflectance excluding specular regular reflection light (SCE), and the measurement can be performed by a measurement method known in the art.

[0052] In the present application, the reflectivity of the cell in the visible light range is lower than 1.5%. When the black fiber layer 5 of low-reflection material is introduced, the appearance of the background and the cell can be guaranteed to be consistent. The black fiber layer 5 of low-reflection material is made of uniform black as a whole or the light-receiving surface is a black layer, and the light-trapping structure is prepared by electrostatic flocking. The black flocking fiber layer can be on the black area of ​​the black grid glaze glass, the film surface of the black backplane, the black surface of the black busbar and / or the black surface of the black PET film. The L value and reflectivity can be further reduced.

[0053] In some embodiments of the present application, the solar cell layer includes a plurality of back contact cells, the plurality of back contact cells are connected by welding strips to form a plurality of cell strings, and the plurality of cell strings are connected by bus bars to form a solar cell layer. In the present application, there is no limitation on the preparation and source of the solar cell layer, and the solar cell layer can be prepared using methods commonly used in the art.

[0054] In some embodiments of the present application, the front plate is selected from a glass front plate.

[0055] In some embodiments of the present application, the backplane is a glass backplane or a CPC backplane.

[0056] In some embodiments of the present application, the first adhesive film layer or the second adhesive film layer is selected from EVA film or POE film; or the black film is a black PET film.

[0057] like Figure 1 As shown, the first element is a black grid backplane, and the black photovoltaic module includes: a front panel 1, a first adhesive film layer 2, a solar cell layer 3, a second adhesive film layer 4, a black fiber layer 5 and a black grid backplane 6 in the direction from the light-receiving surface to the backlight surface. The solar cell layer includes a plurality of back-contact cells, in which the back-contact cells are arranged in parallel with the busbars, and a black flocking fiber layer is provided on the light-receiving surface of the busbars as a busbar black fiber layer. Among them, a carbon fiber layer is formed on the busbars used to connect the battery strings formed by the cells, that is, an existing black busbar is purchased, an adhesive is scraped onto the black busbar, and black fibers are attached to the surface of the black busbar by electrostatic flocking, and the busbar black fiber layer is obtained after passing through a curing device (not shown in the figure).

[0058] Figure 1In the black photovoltaic double-glass component shown, the black grid back plate 6 is a black grid glazed glass, and the grid glaze is a low-temperature glaze or a high-temperature glaze, for example, a high-temperature glaze. A black fiber layer 5 is introduced at the glazing position by electrostatic flocking, and the black fiber layer 5 at this time is a black flocking fiber layer, which is conducive to reducing the reflectivity and is close to the low reflectivity level of black photovoltaics.

[0059] Figure 1 In the black photovoltaic double-glass component shown, the black grid backplane 6 is a black grid glazed glass, the grid glaze is a high-temperature glaze, and a black fiber layer 5 is introduced at the glazed position by electrostatic flocking. In addition, a carbon fiber layer is formed on the busbar as a black fiber layer of the busbar, for example, by purchasing an existing black busbar, applying an adhesive to the black busbar, attaching black carbon fibers to the surface of the black busbar by electrostatic flocking, and passing through a curing device to obtain a black carbon fiber layer 5. By introducing a black fiber layer 5 on the black grid backplane 6 and the busbar, a black background can be provided at the cell spacing and string spacing of the cell, as well as other non-cell coverage areas, reducing the reflectivity to approach the low reflectivity level of the black cell, thereby eliminating the difference in appearance between the black cell area and the non-cell coverage area after lamination. For example, compared with black enameled glass without black fiber layer 5, introducing black flocked fiber layer 5 on black grid enameled glass 6 can reduce the mirror reflectivity, and the L value difference is reduced from the original 45% to 1%, and the reflectivity is further reduced, for example, from the original 7.1% to 1.8%.

[0060] Those skilled in the art will appreciate that a black flocking fiber layer may be introduced on each of the black mesh back plate 6 and the bus bar, or may be introduced on both the black mesh back plate 6 and the bus bar at the same time. Those skilled in the art may make a choice according to actual needs.

[0061] The black photovoltaic double-glass components of this application are as follows Figure 2 As shown, Figure 2 As shown, the first element is a black film, and further includes a black film 7 and a third adhesive film layer 8 between the black fiber layer 5 and the back plate 10, and the black film 7 can be a black PET film. The black photovoltaic includes: a front plate 1, a first adhesive film layer 2, a solar cell layer 3, a second adhesive film layer 4, a black fiber layer 5, a black PET film 7, a third adhesive film layer 8, and a back plate 10 in the direction from the light receiving surface to the back light surface, wherein the black fiber layer 5 is a black flocking fiber layer on the black PET film 7. Figure 2 In the double-glass assembly shown, the back panel 10 is a non-glazed back glass, and a black flocking fiber layer is introduced on the black PET film 7 to provide a black background between the cell spacing and string spacing, as well as other non-cell coverage areas, to reduce reflectivity.

[0062] Figure 2In the black photovoltaic double-glass module shown, the back plate 10 is a non-glazed back glass, and a black flocking fiber layer is introduced on the black PET film 7. In addition, a carbon fiber layer is formed on the busbar as a black fiber layer of the busbar, for example, by purchasing an existing black busbar, applying an adhesive to the black busbar, attaching black carbon fibers to the surface of the black busbar by electrostatic flocking, and passing through a curing device to obtain a black carbon fiber fiber layer of the busbar. By introducing a black fiber layer 5 on the black PET film and the busbar, a black background can be provided in the cell spacing and string spacing of the cell, as well as other non-cell covering areas, to reduce the reflectivity and approach the low reflectivity level of the black cell, thereby eliminating the appearance difference between the black cell area and the non-cell covering area after lamination. For example, compared with a black PET film without a black fiber layer 5, the introduction of a black flocking fiber layer on the black PET film 7 can reduce the specular reflectivity, and the L value difference is reduced from the original 65% to 0.4%, and the reflectivity is further reduced, for example, from the original 4.17% to 2.27%.

[0063] Those skilled in the art will appreciate that a black flocking fiber layer may be introduced on each of the black PET film 7 and the bus bar, or may be introduced on both the PET layer 7 and the bus bar at the same time. Those skilled in the art may make a choice based on actual needs.

[0064] The black photovoltaic single glass component of this application is as follows Figure 3 As shown, the first element is a full black backplane, and the black photovoltaic single glass component includes: a front panel 1, a first adhesive film layer 2, a solar cell layer 3, a second adhesive film layer 4, a black fiber layer 5 and a full black backplane 9 in the direction from the light receiving surface to the backlight surface, wherein the black fiber layer 5 is a black flocked fiber layer on the full black backplane 9. In the single glass component, after the black fiber layer 5 is introduced into the full black backplane 9 by electrostatic flocking, the reflectivity of the full black backplane 9 can be reduced.

[0065] exist Figure 3In the black photovoltaic single glass component shown, a black flocking fiber layer is introduced on the all-black backplane 9 as a black fiber layer 5. In addition, a carbon fiber layer is formed on the busbar used to connect the battery string formed by the battery cells, for example, by purchasing an existing black busbar, applying an adhesive to the black busbar, attaching black carbon fibers to the surface of the black busbar by electrostatic flocking, and obtaining a busbar black carbon fiber layer after passing through a curing device. In this single glass component, by introducing a busbar black flocking fiber layer on the all-black backplane 9 and the busbar, a black background can be provided at the cell spacing and string spacing of the battery cells, as well as other non-battery cell coverage areas, to reduce the reflectivity and approach the low reflectivity level of the black battery, thereby eliminating the appearance difference between the black battery area and the non-battery cell coverage area after lamination. For example, compared with a component without a black fiber layer, the introduction of a black fiber layer 5 on the all-black backplane 9 can reduce the mirror reflectivity, and the L value difference is reduced from the original 6% to 1%, and the reflectivity is further reduced, for example, from the original 5.26% to 1.3%.

[0066] Those skilled in the art will appreciate that a black flocking fiber layer may be introduced on each of the all-black backplane 9 and the bus bar, or may be introduced on both the all-black backplane 9 and the bus bar at the same time. Those skilled in the art may make a choice based on actual needs.

[0067] Example

[0068] The present application provides a general and / or specific description of the materials and test methods used in the experiments. In the following examples, unless otherwise specified, % means wt%, i.e., weight percentage. The reagents or instruments used without indicating the manufacturer are all conventional reagent products that can be obtained commercially.

[0069] Example 1

[0070] This embodiment involves Figure 1A double-glass component is provided, which has a front plate 1, a first adhesive film layer 2, a solar cell layer 3, a second adhesive film layer 4, a black fiber layer 5 and a black grid back plate 6, wherein the black grid back plate 6 is selected from black grid glazed glass, and this embodiment 1 uses high-temperature glaze to flock the black grid glaze glass, and the flocking material is polyamide, and the black fiber layer 5 is a polyamide fiber layer formed by polyamide on the black grid glaze glass. The specific steps are to use a screen consistent with the grid through screen printing, print the adhesive on the black glaze, attach the black polyamide short fiber to the black grid back plate 6 by electrostatic flocking, and after passing through the curing equipment, use the exhaust equipment to suck away the fiber electrostatically adsorbed on the glass in the area without curing agent, and form a polyamide fiber layer on the black grid glaze glass. In addition, a carbon fiber fiber layer is formed on the busbar used to connect the battery string formed by the battery cell, and the adhesive is scraped onto the black busbar by purchasing the existing black busbar, and the black carbon fiber is attached to the surface of the black busbar by electrostatic flocking, and the black carbon fiber layer of the busbar is obtained after passing through the curing equipment. The adhesive used for flocking is commercial flocking glue, and those skilled in the art can select it according to actual needs.

[0071] In this embodiment 1, the polyamide fiber used in the black fiber layer formed on the black grid glazed glass has a fiber length of 0.3 mm, and the fiber linear density of the fiber layer is 2 dtex. The carbon fiber used in the busbar black carbon fiber layer has a fiber length of 0.4 mm, and the fiber linear density of the fiber layer is 8000 dtex.

[0072] Comparative Example 1

[0073] A double-glass assembly was formed in the same manner as in Example 1, except that no flocking was performed and no black fiber layer was present on the black grid glaze glass and on the bus bar. The bus bar was commercially available.

[0074] Example 2

[0075] This embodiment involves Figure 3A single glass component is provided, which has a front plate 1, a first adhesive film layer 2, a solar cell layer 3, a second adhesive film layer 4, a black fiber layer 5 and a CPC back plate 9, wherein an existing CPC back plate is purchased, an adhesive is roller-coated on the black CPC back plate 9, black polyamide short fibers are attached to the surface of the CPC back plate 9 by electrostatic flocking, and a polyamide fiber layer is formed on the black CPC back plate 9 after passing through a curing device. The fiber length of the polyamide fiber used in this embodiment 2 is 0.5 mm, and the fiber line density of the fiber layer is 2 dtex. In addition, a carbon fiber fiber layer is formed on a bus bar used to connect the battery string formed by the battery sheet, for example, by purchasing an existing black bus bar, applying an adhesive to the black bus bar, attaching black carbon fibers to the surface of the black bus bar by electrostatic flocking, and obtaining a black carbon fiber fiber layer after passing through a curing device. The fiber length of the carbon fiber used in the black carbon fiber fiber layer of the bus bar is 0.4 mm, and the fiber line density of the fiber layer is 8000 dtex. The adhesive used for flocking is commercial flocking glue, and those skilled in the art can select it according to actual needs.

[0076] Comparative Example 2

[0077] A single-glass module was formed in the same manner as in Example 2, except that no flocking was performed and no black fiber layer was present on the black CPC backsheet and on the busbars. The busbars were commercially available.

[0078] Example 3

[0079] This embodiment involves Figure 2A double-glass component is provided, which has a front plate 1, a first adhesive film layer 2, a solar cell layer 3, a second adhesive film layer 4, a black fiber layer 5, a black PET film 7, a third adhesive film layer 8 and a back plate 10, wherein the back plate 10 uses non-glazed back glass, and this embodiment 3 uses low-temperature glaze to flock the black PET film, the flocking material is polyester fiber, the back plate 10 is non-glazed back glass, and the black fiber layer is a polyester fiber layer formed on the black PET film 7. An existing black PET film is purchased as the black PET film 7, an adhesive roller is applied to the black PET film 7, black polyester fibers are attached to the black PET film 7 by electrostatic flocking, and a polyester fiber layer is formed on the PET layer 7 after passing through a curing device. The fiber length of the polyester fiber used in this embodiment 3 is 0.3 mm, and the fiber linear density of the fiber layer is 4 dtex. In addition, a carbon fiber layer is formed on a busbar used to connect the battery string formed by the battery cells. For example, an existing black busbar is purchased, an adhesive is applied to the black busbar, and the black carbon fiber is attached to the surface of the black busbar by electrostatic flocking. After passing through a curing device, a black carbon fiber layer of the busbar is obtained. The fiber length of the carbon fiber used in the black carbon fiber layer of the busbar is 0.4 mm, and the fiber line density of the fiber layer is 8000 dtex. The adhesive used for flocking is commercial flocking glue, and those skilled in the art can select it according to actual needs.

[0080] Comparative Example 3

[0081] A double-glass assembly was formed in the same manner as in Example 3, except that no flocking was performed and no black fiber layer was present on the PET layer and on the busbars. The busbars were commercially available.

[0082] The Konica Minolta cm-25d was used to detect the L value (L(SCI)) of the color including specular regular reflection light (SCI) and the L value (L(SCE)) of the color excluding specular regular reflection light (SCE) based on the Lab color space of the structure with a black fiber layer or the structure without a black fiber layer of Examples 1-3 and Comparative Examples 1-3. The a value and b value of the color including specular regular reflection light were detected at the same time, and the L value difference was calculated by the following formula: L value difference = [L(SCI) - L(SCE)] / L(SCI).

[0083] The reflectivity of the structures with or without the black fiber layer of Examples 1-3 and Comparative Examples 1-3 was tested using a Konica Minolta CM-25D. The results are shown in Table 1.

[0084] The effects of the battery assemblies obtained in Examples 1-3 and Comparative Examples 1-3 were visually observed under outdoor light intensity greater than 1000 lux to confirm the differences between the overall assembly and the battery cells. The results are shown in Table 1.

[0085] The commercially available black bus bars in Comparative Examples 1 to 3 were of the same specification.

[0086] The black bus bars of the black fiber layers in the laminates of Examples 1 to 3 are the same.

[0087] Table 1

[0088]

[0089]

[0090] Although the embodiments of the present application are described above, the present application is not limited to the above specific embodiments and application fields, and the above specific embodiments are merely illustrative and instructive, rather than restrictive. A person of ordinary skill in the art can make many forms under the guidance of this specification and without departing from the scope of protection of the claims of the present application, all of which belong to the protection of the present application.

Claims

1. A black photovoltaic module, characterized in that: The photovoltaic module at least comprises: A first element having a black area, and a battery sheet, A black fiber layer is further arranged on the black area of ​​the first element.

2. The photovoltaic module according to claim 1, characterized in that: The first element is a black mesh backplane, and the photovoltaic module comprises, from the light-receiving surface to the backlight surface, a front plate; a first adhesive film layer; a solar cell sheet layer; a second adhesive film layer; a black fiber layer; and a black mesh backplane; or The first element is a full black backplane, and the photovoltaic module comprises, from the light-receiving surface to the backlight surface: a front plate; a first adhesive film layer; a solar cell sheet layer; a second adhesive film layer; a black fiber layer; and a full black backplane; or The first element is a black film, and the photovoltaic module includes, from the light-receiving surface to the backlight surface: a front plate; a first adhesive film layer; a solar cell sheet layer; a second adhesive film layer; a black fiber layer; a black film; a third adhesive film layer; and a back plate.

3. The photovoltaic module according to claim 1, characterized in that: The photovoltaic component further includes a second element having a black area, wherein the second element is a bus bar and / or a welding ribbon, and a black fiber layer is further arranged on the black area of ​​the second element.

4. The photovoltaic module according to any one of claims 1 to 3, characterized in that: The black fiber layer is a black flocking fiber layer.

5. The photovoltaic module according to claim 4, characterized in that: The black fiber layer is a black polyester fiber layer, a black polyamide fiber layer, a black polyimide fiber layer or a black carbon fiber layer.

6. The photovoltaic module according to any one of claims 1 to 3, characterized in that: The reflectivity of the black fiber layer is 0.8% to 3%.

7. The photovoltaic module according to any one of claims 1 to 3, characterized in that: The difference between the color L value of the black fiber layer including the specular regular reflection light and the color L value excluding the specular regular reflection light based on the Lab color space is less than 5%.

8. The photovoltaic module according to claim 2, characterized in that: The front plate is selected from a glass front plate; or The back panel is a glass back panel or a CPC back panel; or The first adhesive film layer or the second adhesive film layer is selected from EVA film or POE film; or The black film is a black PET film.

9. The photovoltaic module according to claim 3, characterized in that: The bus bar and / or welding strip is a black bus bar and / or welding strip, and a black fiber layer is further provided on the black bus bar and / or welding strip; or A black tape is arranged on the bus bar and / or the welding tape, and a black fiber layer is further arranged on the black tape.

10. The photovoltaic module according to claim 2, characterized in that: The solar cell layer comprises a plurality of back-contact cells; the plurality of back-contact cells are connected by welding strips to form a plurality of cell strings, and the plurality of cell strings are connected by bus bars to form a solar cell layer.

11. The photovoltaic module according to claim 6, characterized in that: The reflectivity of the black fiber layer is 1.0% to 1.8%.

12. The photovoltaic module according to claim 7, characterized in that: The color L value of the specular reflected light is 5 to 20, the a value is -1 to 8, and the b value is -5 to 2.

Images