A photovoltaic module with reflective film welding strip

Abstract

The invention discloses a novel reflective film welding belt photovoltaic module, comprising a battery cell, a welding belt, and a reflective film, wherein the welding belt is adhered to the upper surface of the battery cell, the upper surface of the welding belt is adhered to a base material layer, and the upper surface of the base material layer is adhered to a plurality of springs; the reflective film, the spring and the reflector are provided, and the reflective film can improve the utilization rate of sunlight, thereby improving the power generation efficiency of the photovoltaic module; the spring, the elastic block and the fixing plate can not only increase the supporting strength of the reflective film, but also play the role of shock absorption and buffering, and can protect the reflective film, on the other hand, prevent the reflective film from aging and softening in a harsh environment of strong light irradiation, and improve the service life of the reflective film; in addition, by providing the reflector, the reflective efficiency of the reflective film can be further increased, thereby further improving the utilization rate of sunlight and further improving the power generation efficiency of the photovoltaic module.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic modules, in particular to a reflective film welding strip photovoltaic module. Background Art

[0002] How to improve the efficiency of photovoltaic modules and reduce the cost of photovoltaic power generation systems is an urgent problem to be solved in the marketization process of the photovoltaic industry. Among them, photovoltaic welding ribbons are metal connectors used to connect solar cells when producing crystalline silicon photovoltaic modules. The welding ribbons cover and block a certain area of ​​the solar cells. Usually, sunlight directly shining on this part cannot be used by the solar panels, thus causing a waste of light energy and reducing the light energy utilization rate of high photovoltaic modules. The existing technology adds a reflective film to the welding ribbon. When sunlight shines on the reflective film, the reflective film diffusely reflects the sunlight, so that the solar cells receive more light to improve the utilization rate of light. However, the reflective film itself is relatively soft in texture. Under long-term exposure to sunlight, the reflective film may soften and lose the function of reflecting sunlight. Summary of the invention

[0003] The object of the present invention is to provide a reflective film welded tape photovoltaic module to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a reflective film and welded strip photovoltaic module, comprising a cell, a welded strip, and a reflective film, wherein a welded strip is adhered to the upper surface of the cell, a substrate layer is adhered to the upper surface of the welded strip, a plurality of springs are adhered to the upper surface of the substrate layer, an elastic block is adhered to one end of the plurality of springs, a fixing plate is adhered to the upper surface of the elastic block, a reflective film is adhered to the upper surface of the fixing plate, a plurality of reflectors are adhered to the upper surface of the reflective film, and a limiting structure is provided on adjacent surfaces of the elastic block and the fixing plate.

[0005] Preferably, the limiting structure further includes grooves and protrusions, the lower surface of the fixing plate is provided with a plurality of grooves, the upper surface of the elastic block is provided with a plurality of protrusions, the protrusions are plugged into the grooves, and the protrusions are adhered to the grooves.

[0006] Preferably, the angle between the reflector and the horizontal plane is in the range of 5-15 degrees.

[0007] Preferably, the distances between two adjacent reflectors are equal.

[0008] Preferably, the height of the reflector is 45-100 μm.

[0009] Preferably, a high cutoff EVA layer is provided at the bottom of the battery sheet, and the reflective film is provided at the gap between the battery sheets.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The present invention is provided with a reflective film, a spring and a reflector. The reflective film can improve the utilization rate of sunlight, thereby improving the power generation efficiency of the photovoltaic module. The spring, the elastic block and the fixing plate can not only increase the supporting strength of the reflective film, but also play a role of shock absorption and buffering, and can protect the reflective film. On the other hand, it prevents the reflective film from aging and softening in a harsh environment of strong light irradiation, thereby improving the service life of the reflective film. In addition, by providing a reflector, the reflective efficiency of the reflective film can be further increased, thereby further improving the utilization rate of sunlight and further improving the power generation efficiency of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 It is a schematic diagram of the top view structure of the present invention.

[0014] In the figure: 1-battery cell; 2-welding strip; 3-substrate layer; 4-spring; 5-elastic block; 6-fixing plate; 7-reflective film; 8-groove; 9-bump; 10-reflector. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] See also Figure 1-2The present invention provides a technical solution: a reflective film welding strip photovoltaic module, comprising a cell 1, a welding strip 2, and a reflective film 7, the upper surface of the cell 1 is adhered with the welding strip 2, the upper surface of the welding strip 2 is adhered with a base material layer 3, the upper surface of the base material layer 3 is adhered with a plurality of springs 4, one end of the plurality of springs 4 is adhered with an elastic block 5, the upper surface of the elastic block 5 is adhered with a fixing plate 6, the upper surface of the fixing plate 6 is adhered with a reflective film 7, the upper surface of the reflective film 7 is adhered with a plurality of reflectors 10, and the adjacent surfaces of the elastic block 5 and the fixing plate 6 are provided with a limiting structure, The limiting structure also includes grooves 8 and protrusions 9. The lower surface of the fixing plate 6 is provided with a plurality of grooves 8. The upper surface of the elastic block 5 is provided with a plurality of protrusions 9. The protrusions 9 are plugged into the grooves 8 and adhered to the grooves 8. The angle between the reflector 10 and the horizontal plane is in the range of 5-15 degrees. The distance between two adjacent reflectors 10 is equal. The height of the reflector 10 is 45-100 μm. A high cutoff EVA layer is provided at the bottom of the battery cell 1, and the reflective film 7 is provided at the gap between the high cutoff EVA layer and the battery cell 1.

[0017] Working principle: When in use, the reflective film 7 can improve the utilization rate of sunlight, thereby improving the power generation efficiency of the photovoltaic module. The spring 4, the elastic block 5 and the fixed plate 6 can not only increase the supporting strength of the reflective film 7, but also play a role in shock absorption and buffering, and can protect the reflective film 7. On the other hand, it prevents the reflective film 7 from aging and softening in a harsh environment of strong light irradiation, thereby improving the service life of the reflective film 7. In addition, by providing a reflector 10, the reflective efficiency of the reflective film can be further increased, thereby further improving the utilization rate of sunlight and further improving the power generation efficiency of the photovoltaic module. In addition, by providing a groove 8 and a convex block 9, it can further play a limiting role, enhance the strength of the connection between the elastic block 5 and the fixed plate 6, and further improve the service life of the reflective film 7. Since there will be gaps between the battery cells 1, this will cause sunlight to pass through these gaps, and the reflective film 7 at the bottom can reflect the sunlight passing through the gaps back to the high-transmittance glass on the front of the battery cell 1, and then reflect it onto the battery cell 1, thereby further improving the power generation efficiency.

[0018] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0019] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reflective film welding tape photovoltaic module, characterized in that: include: Battery cell (1); Welding strips (2); Reflective film (7); The upper surface of the battery cell (1) is adhered with a welding strip (2), the upper surface of the welding strip (2) is adhered with a base material layer (3), the upper surface of the base material layer (3) is adhered with a plurality of springs (4), one end of the plurality of springs (4) is adhered with an elastic block (5), the upper surface of the elastic block (5) is adhered with a fixing plate (6), the upper surface of the fixing plate (6) is adhered with a reflective film (7), the upper surface of the reflective film (7) is adhered with a plurality of reflectors (10), and a limiting structure is provided on adjacent surfaces of the elastic block (5) and the fixing plate (6); The limiting structure further comprises grooves (8) and protrusions (9); the lower surface of the fixing plate (6) is provided with a plurality of grooves (8); the upper surface of the elastic block (5) is provided with a plurality of protrusions (9); the protrusions (9) are plugged into the grooves (8); and the protrusions (9) are adhered to the grooves (8); The angle between the reflector (10) and the horizontal plane is in the range of 5-15 degrees; The distance between two adjacent reflectors (10) is equal; The height of the reflector (10) is 45 to 100 μm; A high cut-off EVA layer is provided at the bottom of the battery sheet (1), and the reflective film (7) is provided at the gap between the high cut-off EVA layer and the battery sheet (1).

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