A highly UV-resistant photovoltaic reflective gap film
By setting up multiple reflective and structural layers in the reflective gap film of the photovoltaic module, it effectively reflects sunlight and prevents damage to ultraviolet light, solving the problem of insufficient yellowing and ultraviolet cutoff capabilities of the film, and achieving the effect of increasing the back of the component and reducing the chance of yellowing.
Patent Information
- Application Number
- CN202421243232.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The reflective gap film of existing photovoltaic modules is prone to yellowing under the action of ultraviolet light, affecting the appearance of the module and lacking effective UV cutoff capability.
A reflective gap film for high-resistant UV photovoltaics is designed. By providing a first reflective layer, a first structural layer, a second reflective layer and a second structural layer on both sides of the carrier layer, the sunlight is effectively reflected in the gap between the battery panels, and preventing ultraviolet light from causing damage to the internal materials of the film.
The probability of the film being yellowed is greatly reduced, while increasing the reflected power on the back of the carrier layer, increasing the power output on the back of the component, and the design of the second structural layer is conducive to the discharge of bubbles after lamination of the back glue layer.
Smart Images
Figure CN222700230U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of the photovoltaic industry, in particular to a highly UV-resistant photovoltaic reflective gap film. Background Art
[0002] In recent years, the photovoltaic industry has developed rapidly, industry requirements have continued to increase, and the power demand for photovoltaic modules has also gradually increased.
[0003] At present, the mainstream method in the industry to utilize the gap area between battery cells to increase the power of components is white glazed glass and regular gap reflective film.
[0004] Traditional gap reflective film mainly consists of an aluminized layer (for reflection), a structural layer (for orientation), a carrier layer (carrier), and an adhesive layer (for adhesive). The aluminized layer and the structural layer are arranged on the same side of the carrier layer, and the adhesive layer is arranged on the other side of the carrier layer. The adhesive layer is adhered to the back glass of the photovoltaic module.
[0005] The film is pasted on the battery cells at the string spacing and cell gap.
[0006] Since the glass on the back of the component does not have the function of UV blocking, and the adhesive layer of the reflective gap film is thin and has limited UV blocking ability, ultraviolet light will more or less pass through the glass and the adhesive layer of the gap film, causing the materials of the carrier layer and the structural layer to turn yellow, affecting the appearance of the component. Utility Model Content
[0007] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a highly UV-resistant photovoltaic reflective gap film, which has the effect of greatly reducing the yellowing probability of the film while increasing the reflective power of the back side of the carrier layer.
[0008] The above technical objectives of the utility model are achieved through the following technical solutions:
[0009] A highly UV-resistant photovoltaic reflective gap film comprises a film body, wherein the film body comprises a first reflective layer, a first structural layer, a carrier layer and an adhesive layer, wherein the first structural layer and the first reflective layer are both arranged on the same side of the carrier layer, and a second reflective layer and a second structural layer are arranged on the other side of the carrier layer.
[0010] In a preferred example, the present invention can be further configured as follows: the thickness of the first reflective layer and the second reflective layer are both 30 nanometers to 120 nanometers;
[0011] The first reflective layer and the second reflective layer are both made of metal aluminum.
[0012] In a preferred example, the utility model can be further configured as follows: the thickness of the carrier layer is 15 microns to 60 microns, and the material of the carrier layer is any one of PP film and PET film.
[0013] In a preferred example, the utility model can be further configured as follows: the cross-section of the first structural layer and the cross-section of the second structural layer are both isosceles triangles, the vertex angle of the isosceles triangle is 100 degrees to 125 degrees, and the height of the isosceles triangle is 8 microns to 20 microns.
[0014] In a preferred example, the utility model can be further configured as follows: the thickness of the adhesive layer is 30 microns to 120 microns.
[0015] In summary, the utility model includes at least one of the following beneficial technical effects:
[0016] 1. By arranging the first reflective layer, the first structural layer, the second reflective layer and the second structural layer on both sides of the carrier layer, the sunlight incident from the gap between the solar panels is reflected, and the ultraviolet light cannot cause damage to the materials of the carrier layer and the structural layer inside the film, which greatly reduces the probability of yellowing of the film. In addition, since the second reflective layer is arranged on the back of the carrier layer, the reflection power of the back of the carrier layer is increased.
[0017] 2. By arranging a second structural layer and a second reflective layer on the side of the carrier layer away from the photovoltaic panel, the sunlight on the back of the component is reflected by the two layers and is reflected onto the battery cell, thereby increasing the power on the back of the component.
[0018] 3. By arranging a second structural layer on the back of the carrier layer, the second structural layer has a certain height, and the second structure is similar to a guide groove structure, which is conducive to the discharge of bubbles after the back adhesive layer is laminarized. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the overall structure of this embodiment.
[0020] In the figure, 1, film body; 11, first reflective layer; 12, first structural layer; 13, carrier layer; 14, adhesive layer; 2, second reflective layer; 21, second structural layer. DETAILED DESCRIPTION
[0021] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0022] Example:
[0023] Reference Figure 1 The utility model discloses a highly UV-resistant photovoltaic reflective gap film, which includes a film body 1. The film body 1 includes a carrier layer 13.
[0024] The first structure layer 12 and the first reflective layer 11 are disposed on one side of the carrier layer 13 , and the second structure layer 21 and the second reflective layer 2 are disposed on the other side of the carrier layer 13 .
[0025] The thickness of the first reflective layer 11 and the second reflective layer 2 are both 30 nanometers to 120 nanometers. The material of the first reflective layer 11 and the second reflective layer 2 are both metal aluminum. In this embodiment, the thickness of the first reflective layer 11 and the second reflective layer 2 are both 60 nanometers.
[0026] The thickness of the carrier layer 13 is 15 micrometers to 60 micrometers, and the material of the carrier layer 13 is any one of PP film and PET film.
[0027] In this embodiment, the thickness of the carrier layer 13 is 40 micrometers. The material of the carrier layer 13 is PP film.
[0028] The cross-section of the first structural layer 12 and the cross-section of the second structural layer 21 are both isosceles triangles, the vertex angle of the isosceles triangle is 100-125 degrees, and the height of the isosceles triangle is 8-20 microns. In this embodiment, the isosceles triangle has an angle of 110 degrees and a height of 15 microns.
[0029] The material of the structural layer is UV glue.
[0030] The thickness of the adhesive layer 14 is 30 micrometers to 120 micrometers. In this embodiment, the thickness of the adhesive layer 14 is 50 micrometers.
[0031] The microstructure is prepared on the surface of the pressure roller by high-precision engraving equipment, UV glue is coated on the surface of the carrier layer 13, and UV curing is performed while passing through the glue roller to obtain the first structural layer 12 and the second structural layer 21 with excellent strength.
[0032] The surfaces of the first structural layer 12 and the second structural layer 21 are plated by electroplating process to form the first reflective layer 11 and the second reflective layer 2 of aluminum metal compounded along the structural layers.
[0033] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A highly UV-resistant photovoltaic reflective gap film, comprising a film body (1), wherein the film body (1) comprises a first reflective layer (11), a first structural layer (12), a carrier layer (13) and an adhesive layer (14), wherein the first structural layer (12) and the first reflective layer (11) are both arranged on the same side of the carrier layer (13), and characterized in that: A second reflective layer (2) and a second structural layer (21) are provided on the other side of the carrier layer (13).
2. The high UV resistant photovoltaic reflective gap film according to claim 1, characterized in that: The thickness of the first reflective layer (11) and the second reflective layer (2) are both 30 nanometers to 120 nanometers; The first reflective layer (11) and the second reflective layer (2) are both made of metal aluminum.
3. The high UV resistant photovoltaic reflective gap film according to claim 2, characterized in that: The thickness of the carrier layer (13) is 15 micrometers to 60 micrometers, and the material of the carrier layer (13) is any one of a PP film and a PET film.
4. The high UV resistant photovoltaic reflective gap film according to claim 3, characterized in that: The cross-section of the first structural layer (12) and the cross-section of the second structural layer (21) are both isosceles triangles, the vertex angle of the isosceles triangle is 100 degrees to 125 degrees, and the height of the isosceles triangle is 8 micrometers to 20 micrometers.
5. The high UV resistant photovoltaic reflective gap film according to claim 4, characterized in that: The thickness of the adhesive layer (14) is 30 micrometers to 120 micrometers.