Black bearing film and photovoltaic module

Abstract

The utility model relates to the field of photovoltaic technology, in particular to a black bearing film and a photovoltaic module. The black bearing film comprises a base material and a black adhesive layer. The black adhesive layer is printed on one side of the base material, and one side, deviating from the black adhesive layer, of the base material is used for bonding a battery piece, so that the black adhesive layer shields a welding strip and / or a bus bar on the battery piece. The black bearing film is simpler in structure and lower in manufacturing cost. The black adhesive layer has certain hardness after UV curing, so that certain supporting force can be provided for the base material, the stiffness of the black bearing film is improved, the phenomenon of film rolling is reduced, the production efficiency is improved, and the cost is saved. And the black adhesive layer can perform secondary reflection and utilization on the light, so that the photoelectric conversion efficiency of the photovoltaic module is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic technology field especially relates to a black bearing film and photovoltaic module. BACKGROUND

[0002] At present, black photovoltaic module generally adopts black solder strip to improve the aesthetic degree of black photovoltaic module. Black solder strip is usually made by coating a layer of black resin coating on the surface of silver solder wire, and the manufacturing process is more complicated, and the cost is higher. At the same time, in the production process, the solder strips will inevitably rub against each other, resulting in the phenomenon of black coating discoloration, reducing the product yield.

[0003] In addition, part of the black photovoltaic module in the prior art adopts black strip film to shield the solder strip. However, due to the soft texture of the black strip film, the phenomenon of film rolling may occur during the process of pasting the solder strip with the black strip film, reducing the production efficiency and increasing the cost. At the same time, the existing black strip film hardly reflects light, reducing the photoelectric conversion efficiency of the photovoltaic module.

[0004] Therefore, it is urgent to design a black bearing film and photovoltaic module to solve the above technical problems. SUMMARY

[0005] The first purpose of the utility model is to provide a black bearing film, which has simple structure, low cost, can improve the product yield and production efficiency of the photovoltaic module, and improve the photoelectric conversion efficiency.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a black bearing film, which comprises:

[0008] a base material;

[0009] a black adhesive layer printed on one side of the base material, the side of the base material away from the black adhesive layer being used for bonding the cell sheet, and the black adhesive layer shielding the solder strip and / or bus bar on the cell sheet.

[0010] As an optional technical scheme of the black bearing film, the width of the black adhesive layer is equal to the width of the base material.

[0011] As an optional technical scheme of the black bearing film, the width of the black adhesive layer is less than the width of the base material, so that a light-transmitting area is formed on the base material, and the light-transmitting area faces the cell sheet.

[0012] As an optional technical scheme of the black bearing film, the base material and the black adhesive layer are both in strip shape, the base material and the black adhesive layer are both provided as a plurality of strips, and the base material and the black adhesive layer are one-to-one corresponding.

[0013] As an optional technical solution of the black carrier film, the projection area of the black adhesive layer in the direction perpendicular to the light-receiving surface of the battery piece is not less than the projection area of the solder strip.

[0014] And / or, the projection area of the black adhesive layer in the direction perpendicular to the light-receiving surface of the battery piece is not less than the projection area of the bus bar.

[0015] As an optional technical solution of the black carrier film, the substrate is one of EVA, POE or PVB.

[0016] As an optional technical solution of the black carrier film, the thickness of the black adhesive layer is set to be between 3 μm and 10 μm.

[0017] As an optional technical solution of the black carrier film, the width of the black adhesive layer is set to be between 2 mm and 4 mm.

[0018] As an optional technical solution of the black carrier film, the light transmittance of the black adhesive layer after curing is set to be between 75% and 90%.

[0019] The second purpose of the utility model provides a photovoltaic module, can improve the consistency of photovoltaic module appearance, reduce the manufacturing cost of photovoltaic module, reduce the phenomenon of roll film, improve work efficiency, improve the product yield of photovoltaic module.

[0020] To achieve this purpose, the utility model adopts the following technical scheme:

[0021] The utility model provides a photovoltaic module, the photovoltaic module includes front glass, back glass, front encapsulation adhesive film, back encapsulation adhesive film, battery piece, solder strip, bus bar and the black carrier film above described;

[0022] The solder strip is connected with the battery piece through the black carrier film, and the bus bar is connected with the solder strip and constitutes a battery unit, and the black carrier film shields the solder strip and / or the bus bar;

[0023] The opposite two sides of the battery unit are connected with the front encapsulation adhesive film and the back encapsulation adhesive film respectively, the front glass is connected with the front encapsulation adhesive film, and the back glass is connected with the back encapsulation adhesive film.

[0024] The utility model has at least the following beneficial effects:

[0025] The utility model provides a black carrier film, the black carrier film includes substrate and black adhesive layer. Black adhesive layer is printed on one side of substrate, and the side of substrate away from black adhesive layer is used for bonding battery piece, and black adhesive layer shields solder strip and / or bus bar on battery piece.

[0026] By setting the substrate and the black adhesive layer, and printing the black adhesive layer on the substrate, the side of the substrate away from the black adhesive layer is bonded to the battery piece, and the black adhesive layer shields the welding strip and / or the bus bar, thereby improving the consistency of the appearance of the photovoltaic module. The black adhesive layer has a certain hardness after UV curing, in other words, the black adhesive layer has a hard texture after UV curing, thereby being able to provide a certain supporting force for the substrate, improving the rigidity of the black carrier film, reducing the phenomenon of film rolling, improving production efficiency, and saving costs. At the same time, the black adhesive layer can reflect light, thereby realizing the secondary use of light and improving the photoelectric conversion rate of the photovoltaic module. The black adhesive layer is printed on the surface of the substrate, without the need for the black resin coating on the surface of the welding wire in the prior art, thereby reducing the process difficulty and manufacturing cost, and also avoiding the color loss problem caused by friction of the black resin coating in the prior art. The black carrier film structure in the present application is simpler and has lower manufacturing cost.

[0027] The utility model also provides a photovoltaic module, can improve photovoltaic module appearance's consistency, reduce photovoltaic module's manufacturing cost, reduce the phenomenon of film rolling, improve photovoltaic module's photoelectric conversion rate. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the contents of the embodiments of the present application and these drawings without creating labor.

[0029] Figure 1 It is the structure diagram of the black carrier film provided by the embodiment of the present application Figure 1 ;

[0030] Figure 2 It is the structure diagram of the black carrier film provided by the embodiment of the present application Figure 2 ;

[0031] Figure 3 It is the structure diagram of the black carrier film provided by the embodiment of the present application

[0032] Figure 4 It is the structure diagram of the photovoltaic module provided by the embodiment of the present application.

[0033] REFERENCE NUMERALS

[0034] 100, substrate; 110, light transmission area;

[0035] 200, black adhesive layer;

[0036] 300, battery piece; 310, solder strip; 320, bus bar. DETAILED DESCRIPTION

[0037] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0039] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships in which the product of the present application is usually placed during use, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0041] In the description of the present application, it should also be noted that, unless otherwise specified and limited, the terms "set", "connected" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0044] This embodiment provides a black carrier film with a simple structure and low cost, which can improve the product yield and production efficiency of photovoltaic modules.

[0045] like Figures 1-3 As shown, the black carrier film mainly includes a substrate 100 and a black adhesive layer 200. The black adhesive layer 200 is printed on one side of the substrate 100, and the side of the substrate 100 opposite to the black adhesive layer 200 is used to bond the battery cell 300. The black adhesive layer 200 covers the solder ribbon 310 and / or busbar 320 on the battery cell 300.

[0046] Based on the above design, the use of a substrate 100 and a black adhesive layer 200, with the black adhesive layer 200 printed on the substrate 100, and the side of the substrate 100 facing away from the black adhesive layer 200 bonded to the solar cell 300, and the black adhesive layer 200 masking the solder ribbon 310 and / or busbar 320, improves the uniformity of the photovoltaic module's appearance. The black adhesive layer 200, after UV curing, has a certain degree of hardness; in other words, it is relatively hard after UV curing, thus providing support for the substrate 100, increasing the rigidity of the black carrier film, reducing film curling, improving production efficiency, and saving costs. Simultaneously, because the black adhesive layer 200 has poor adhesion at high temperatures after curing, this avoids the problem of roller adhesion caused by later roller pressing of the black carrier film, improving the efficiency of black carrier film application.

[0047] The black adhesive layer 200 is printed on the surface of the substrate 100 without coating a black resin layer on the surface of the solder wire in the prior art, which reduces the process difficulty and manufacturing cost, and avoids the color loss caused by the friction of the black resin layer in the prior art. The black carrier film structure in the embodiment is simpler and has lower manufacturing cost. In addition, the black adhesive layer 200 in the embodiment can reflect light, thereby realizing secondary utilization of light and improving the photoelectric conversion rate of the photovoltaic module.

[0048] Optionally, the black adhesive layer 200 in the embodiment can be screen printed by using the existing screen printing equipment in the factory workshop, thereby saving cost and improving work efficiency.

[0049] Optionally, the black adhesive layer 200 in the embodiment is mixed by a certain proportion of perylene black pigment and glue. The perylene black pigment can reflect light in the near-infrared band while realizing black, thereby realizing secondary utilization of light and improving the photoelectric conversion rate of the photovoltaic module. The glue can be selected from acrylic, silicone, polyurethane and other UV light curing system glues.

[0050] It should be noted that the perylene black pigment is also called perylene black pigment, which is a high-performance organic black pigment and belongs to the category of condensed ring ketones (reduced dyes). The perylene pigment has excellent chemical stability and thermal stability, as well as high light and weather fastness.

[0051] As shown in Figure 1 Optionally, the substrate 100 and the black adhesive layer 200 in the embodiment can be provided in the form of a whole film to correspond to the cell piece 300, and the width of the black adhesive layer 200 is equal to the width of the substrate 100, thereby reducing the precision requirement of printing the black adhesive layer 200 and improving work efficiency.

[0052] As shown in Figure 2 In some optional embodiments, the width of the black adhesive layer 200 is less than the width of the substrate 100, so that the light transmission area 110 is formed on the substrate 100, and the light transmission area 110 is opposite to the cell piece 300. In other words, when the substrate 100 is in the form of a whole film, the light transmission area 110 can be formed by intermittently printing the black adhesive layer 200 on the substrate 100, so that the area where the black adhesive layer 200 is not printed is the light transmission area 110. In this way, the area where the solder strip 310 is attached is black, and the area where the cell piece 300 is attached is transparent (i.e., the light transmission area 110), thereby reducing the shielding of the cell piece 300, improving the light transmittance of the photovoltaic module, and improving the photoelectric conversion efficiency.

[0053] As shown in Figure 3As shown, the substrate 100 and the black adhesive layer 200 in the embodiment can both be in a strip shape, the substrate 100 and the black adhesive layer 200 are both provided as a plurality of strips, and the substrate 100 and the black adhesive layer 200 are provided in a one-to-one correspondence. In this way, the grammage of the substrate 100 can be reduced, and the cost of the substrate 100 can be saved.

[0054] Optionally, in the embodiment, the projection area of the black adhesive layer 200 in the direction perpendicular to the light-receiving surface of the cell sheet 300 is not less than the projection area of the solder strip 310; and / or, the projection area of the black adhesive layer 200 in the direction perpendicular to the light-receiving surface of the cell sheet 300 is not less than the projection area of the bus bar 320. In this way, the black adhesive layer 200 can completely shield the solder strip 310 and / or the bus bar 320, thereby ensuring the consistency of the appearance of the photovoltaic module and improving the aesthetic appearance of the photovoltaic module.

[0055] Optionally, the substrate 100 in the embodiment is one of an EVA piece, a POE piece, or a PVB piece, thereby reducing the cost of the substrate 100 and making the substrate 100 easy to obtain. At the same time, it can be ensured that the back surface of the substrate 100 (which is the surface coated with the black adhesive layer 200) is stably bonded to the cell sheet 300 under high-temperature conditions.

[0056] Optionally, the thickness of the black adhesive layer 200 in the embodiment is set to 3 μm-10 μm, and the width of the black adhesive layer 200 is set to 2 mm-4 mm. Exemplarily, the thickness of the black adhesive layer 200 can be set to 3 μm, 5 μm, 10 μm, etc. The width of the black adhesive layer 200 can be set to 2 mm, 3 mm, 4 mm, etc.

[0057] Optionally, the light transmittance of the black adhesive layer 200 after curing in the embodiment is set to 75%-90%, thereby reducing the influence on the light transmittance of the photovoltaic module while ensuring the consistency of the appearance of the photovoltaic module, and improving the photoelectric conversion efficiency of the photovoltaic module.

[0058] In some optional embodiments, in a ZBB (Zero-Busbar) photovoltaic module (i.e., a no-main-grid photovoltaic module), an operator can pre-apply adhesive to fix the solder strip 310, and then directly print the black adhesive layer 200 on the position of the adhesive film of the ZBB photovoltaic module corresponding to the solder wire and the bus bar 320. Of course, the adhesive film printed with the black adhesive layer 200 can also be cut and laid on the side of the glass facing the cell sheet 300, so that the adhesive film is attached to the solder strip 310 in the subsequent lamination process.

[0059] As shown, Figures 3-4As shown, the embodiment also provides a photovoltaic module, which comprises the cell sheet 300, the solder strip 310, the busbar 320 and the black carrier film as described above, the solder strip 310 is welded to the cell sheet 300, the busbar 320 is connected to the solder strip 310 to make the current in the cell sheet 300 smoothly lead out, and the black carrier film shields the solder strip 310 and / or the busbar 320.

[0060] Further, the photovoltaic module comprises a front glass, a back glass, a front encapsulation adhesive film and a back encapsulation adhesive film. The solder strip 310 is connected to the cell sheet 300 through the black carrier film, and the busbar 320 is connected to the solder strip 310 and constitutes a cell unit, the opposite two surfaces of the cell unit are connected to the front encapsulation adhesive film and the back encapsulation adhesive film respectively, the front glass is connected to the front encapsulation adhesive film, and the back glass is connected to the back encapsulation adhesive film. In other words, the photovoltaic module is composed of the back glass, the back encapsulation adhesive film, the cell unit, the front encapsulation adhesive film and the front glass which are sequentially stacked.

[0061] Since the photovoltaic module has the black carrier film as described above, the consistency of the appearance of the photovoltaic module can be improved, the manufacturing cost of the photovoltaic module can be reduced, the phenomenon of film rolling can be reduced, the photoelectric conversion rate of the photovoltaic module can be improved, the work efficiency can be improved, and the product yield of the photovoltaic module can be improved.

[0062] Obviously, the above only describes the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and more other equivalent embodiments can be included without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

[0063] Note that in the description of the present specification, the description referring to the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A black support film, characterized by, The black adhesive layer (200) is printed on one side of the substrate (100), the side of the substrate (100) away from the black adhesive layer (200) is used for bonding the battery piece (300), the black adhesive layer (200) can shield the solder strip (310) and / or the bus bar (320) on the battery piece (300); the black adhesive layer (200) is a UV curing adhesive layer. The width of the black adhesive layer (200) is equal to the width of the substrate (100). The width of the black adhesive layer (200) is less than the width of the substrate (100), so that a light transmission area (110) is formed on the substrate (100), and the light transmission area (110) is opposite to the battery piece (300).

2. The black support film according to claim 1, characterized by The substrate (100) and the black adhesive layer (200) are both in strip shape, the substrate (100) and the black adhesive layer (200) are both provided in multiple strips, and the substrate (100) and the black adhesive layer (200) are one-to-one corresponding.

3. The black support film according to claim 1, wherein The projection area of the black adhesive layer (200) is not less than the projection area of the solder strip (310) in the direction perpendicular to the light receiving surface of the battery piece (300); 4. The black support film according to claim 3, characterized in that, The projection area of the black adhesive layer (200) is not less than the projection area of the bus bar (320) in the direction perpendicular to the light receiving surface of the battery piece (300).

5. The black support film according to claim 1, wherein The substrate (100) is one of an EVA piece, a POE piece or a PVB piece. The thickness of the black adhesive layer (200) is 3-10 microns.

6. The black support film according to claim 1, wherein The width of the black adhesive layer (200) is 2-4 mm.

7. The black support film according to claim 1, wherein The light transmission rate of the black adhesive layer (200) after curing is 75-90%.

8. The black support film according to claim 1, wherein The photovoltaic module comprises a front glass, a back glass, a front encapsulating adhesive film, a back encapsulating adhesive film, a battery piece (300), a solder strip (310), a bus bar (320) and the black carrier film of any one of claims 1-9; 9. The black support film according to claim 1, wherein The solder strip (310) is connected with the battery piece (300) through the black carrier film, and the bus bar (320) is connected with the solder strip (310) and constitutes a battery unit, and the black carrier film shields the solder strip (310) and / or the bus bar (320); 10. A photovoltaic module characterized by, The opposite two surfaces of the battery unit are connected with the front encapsulating adhesive film and the back encapsulating adhesive film respectively, the front glass is connected with the front encapsulating adhesive film, and the back glass is connected with the back encapsulating adhesive film. ​ ​

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