Photovoltaic module gap film with double-sided aluminum layer

Abstract

The utility model provides a photovoltaic module gap film with a double-sided aluminum layer, including: a photovoltaic module gap film body applied between the cells of the photovoltaic module, which includes a base film layer and a concave prism structure layer, an aluminum layer and an EVA resin bonding layer, the concave prism structure layer includes a pattern formed integrally on one side of the base film layer and a concave prism aluminum-plated reflective surface layer provided on a side of the pattern away from the base film layer, the pattern is formed by a number of triangular prisms arranged side by side, and the aluminum layer is plated on both sides of the base film layer by an evaporation aluminum plating process or a sputtering aluminum plating process. The photovoltaic module gap film with a double-sided aluminum layer provided by the utility model adopts an aluminum layer to replace the single-sided gap film of the photovoltaic module in the prior art, and the aluminum layer has excellent weather resistance and is not easy to be damaged. While increasing the service life of the gap film, it can also improve the power generation function and appearance aesthetics of the photovoltaic module.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic cell manufacturing, in particular to a photovoltaic component gap film with a double-sided aluminum layer. Background Art

[0002] The applicant applied for a utility model patent on January 6, 2023, with the publication (announcement) date of May 26, 2023 and the publication (announcement) number of CN219085989U, disclosing a gap film for photovoltaic modules, including: an inter-synergistic material body used between the battery cells of the photovoltaic module, which includes a base film layer and a concave prism structure layer, an aluminum layer and an EVA resin bonding layer, the concave prism structure layer includes a pattern integrally formed on one side of the base film layer and a concave prism aluminum-plated reflective surface layer arranged on the side of the pattern away from the base film layer, the pattern is formed by a number of triangular prisms arranged side by side, and the aluminum layer is plated on the other side of the base film layer by an evaporation aluminum plating process or a sputtering aluminum plating process.

[0003] Although the above-mentioned gap film for photovoltaic modules, under the effect of the concave prism, makes the use of the gap film for photovoltaic modules, when the sunlight is incident on its surface, most of it will be reflected on the side of the concave prism, and then concentrated and reflected to the photovoltaic power generation area, and at the same time a small part of the light will be directly reflected to the photovoltaic power generation area through its surface, effectively improving the efficiency of light energy utilization, reducing light energy waste, and thus improving the power generation efficiency of photovoltaic panels. However, in the subsequent use of the above-mentioned gap film for photovoltaic modules, it was found that the base material PET layer set therein has poor weather resistance, is easy to turn yellow, and is easily damaged by ultraviolet light in the sun, thus affecting the service life of the gap film.

[0004] To this end, a photovoltaic module gap film with a double-sided aluminum layer is proposed. Utility Model Content

[0005] The utility model aims to solve the problems raised in the background technology and provides a photovoltaic component gap film with double-sided aluminum layers.

[0006] The specific technical solutions are as follows:

[0007] A photovoltaic module gap film with a double-sided aluminum layer, comprising:

[0008] A photovoltaic module gap film body applied between photovoltaic cell modules, comprising a base film layer, a concave prism structure layer, an aluminum layer and an EVA resin bonding layer, wherein the concave prism structure layer comprises a pattern integrally formed on one side of the base film layer and a concave prism aluminum-plated reflective surface layer arranged on a side of the pattern away from the base film layer, wherein the pattern is formed by a plurality of triangular prisms arranged side by side, the aluminum layer is plated on both sides of the base film layer by an evaporation aluminum plating process or a sputtering aluminum plating process, and the EVA resin bonding layer is bonded to a side of the aluminum layer away from the base film layer, wherein:

[0009] There is no gap between the prism surfaces of two adjacent triangular prisms that overlap with one side of the base film layer, and all the triangular prisms are arranged parallel to each other. The angle between the triangular prism and the film direction of the base film layer is at a certain inclination angle, and the angle between the concave prism and the horizontal direction is 16-20°, and the thickness of the aluminum layer is 40-100nm.

[0010] The above-mentioned photovoltaic module gap film with double-sided aluminum layer, wherein: the angle between two adjacent triangular prisms is 110°-130°.

[0011] The above-mentioned photovoltaic module gap film with double-sided aluminum layer, wherein: the width of the bottom surface of the prism where the triangular prism overlaps with one side surface of the base film layer is 20-50um.

[0012] The above-mentioned photovoltaic module gap film with double-sided aluminum layer, wherein: the angle of the triangular prism away from the base film layer is 110°-130°.

[0013] The above-mentioned photovoltaic module gap film with double-sided aluminum layer, wherein: a corner of the triangular prism away from the base film layer has a chamfer, and the chamfer is 20-45°.

[0014] The above-mentioned photovoltaic module gap film with double-sided aluminum layer, wherein: the base film layer is a PET film layer.

[0015] The above-mentioned photovoltaic module gap film with double-sided aluminum layer, wherein: the height of the triangular prism is 6 to 15 um.

[0016] The utility model has the following beneficial effects:

[0017] The photovoltaic module gap membrane with double-sided aluminum layer provided by the utility model adopts the aluminum layer to replace the single-sided gap membrane of the photovoltaic module in the prior art. The aluminum layer has excellent weather resistance and is not easy to be damaged. While increasing the service life of the gap membrane, it can also improve the power generation function and aesthetic appearance of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A schematic diagram of the structure of a photovoltaic module gap film with a double-sided aluminum layer provided in an embodiment of the utility model

[0019] Figure 2 A schematic diagram of the partial structure of a photovoltaic module gap membrane with a double-sided aluminum layer provided in an embodiment of the utility model;

[0020] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0021] Figure 4 for Figure 2 Schematic diagram of the structure with the AA section rotated -72 degrees;

[0022] Figure 5 A schematic diagram of a photovoltaic module gap film with a double-sided aluminum layer provided in an embodiment of the utility model being applied between photovoltaic cell modules.

[0023] In the attached figure:

[0024] 1. Base film layer; 2. Triangular prism; 3. Concave prism structure layer; 4. Aluminum layer; 5. EVA resin bonding layer; 6. Concave prism aluminum-plated reflective surface layer. DETAILED DESCRIPTION

[0025] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0026] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0027] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Example

[0030] The photovoltaic module gap film with double-sided aluminum layer provided in this embodiment is as follows: Figure 1-Figure 4 As shown, it includes: a photovoltaic component gap film body applied between photovoltaic cell components.

[0031] Among them, the photovoltaic module gap film body includes a base film layer 1, a concave prism structure layer 3, an aluminum layer 4 and an EVA resin bonding layer 5. The concave prism structure layer 3 includes a pattern integrally formed on one side of the base film layer 1 and a concave prism aluminum-plated reflective surface layer 6 arranged on the side of the pattern away from the base film layer 1. The pattern is formed by a number of triangular prisms 2 arranged side by side. The aluminum layer 4 is plated on both sides of the base film layer 1 by an evaporation aluminum plating process or a sputtering aluminum plating process. The EVA resin bonding layer 5 is bonded to the side of the aluminum layer 4 away from the base film layer 1. The base film layer 1 is a PET film layer.

[0032] The concave prism structure layer 3 and the aluminum layer 4 cooperate with each other to effectively improve the photovoltaic cell assembly's ability to absorb sunlight, thereby improving power generation efficiency. The EVA resin bonding layer 5 is convenient for thermally attaching the gap film to the back glass of the photovoltaic assembly. What is particularly important is that the aluminum layer 4 is used to replace the single-sided gap film of the photovoltaic assembly in the prior art. The aluminum layer 4 has excellent weather resistance and is not easy to damage. While increasing the service life of the gap film, it can also improve the power generation function and aesthetic appearance of the photovoltaic assembly.

[0033] It is worth noting that in the prior art, the thickness of the single-sided gap film of the photovoltaic module is generally 5-10um, resulting in high production costs, while the aluminum layer 4 prepared by the evaporation aluminum plating process or the sputtering aluminum plating process can be as thick as 100nm, which can reduce production costs. At the same time, the white high reflectivity coating has a UV resistance of 60-120kwH, and a yellowing index of △b<3, while the aluminum-plated layer has a UV resistance of 200-300kwH, and a yellowing index of △b<3. Therefore, the aluminum layer 4 is much better than the white high reflectivity coating.

[0034] Among them, in order to meet the process requirements, there is no gap between the prism surfaces of two adjacent triangular prisms 2 that overlap with one side of the base film layer 1, and all the triangular prisms 2 are arranged parallel to each other, the angle between the triangular prism 2 and the film direction of the base film layer 1 is 70-74°, and the angle between the triangular prism 2 and the horizontal direction is 16-20°; the angle between two adjacent triangular prisms 2 is 110°-130°; the width of the prism bottom surface that overlaps with one side of the base film layer 1 is 25um; the corner of the triangular prism 2 away from the base film layer 1 is 110°-130°; the corner of the triangular prism 2 away from the base film layer 1 has a chamfer, the chamfer is 20-45°, and the height of the triangular prism 2 is 6-15um.

[0035] The photovoltaic module gap film with a double-sided aluminum layer using the above technical solution is composed of a base film layer 1, a concave prism structure layer 3, an aluminum layer 4 and an EVA resin bonding layer 5, wherein the concave prism structure layer 3 is composed of a pattern integrally formed on one side of the base film layer 1 and a concave prism aluminum-plated reflective surface layer 6 arranged on a side of the pattern away from the base film layer 1, and the pattern is formed by a number of triangular prisms 2 arranged side by side, wherein there is no gap between the prism surfaces of two adjacent triangular prisms 2 that overlap with one side of the base film layer 1, and all the triangular prisms 2 are arranged parallel to each other, the angle between the triangular prism 2 and the film direction of the base film layer 1 is 70-74°, and the angle between the triangular prism 2 and the horizontal direction is 16-20°, and the angle between two adjacent triangular prisms 2 is 16-20°. The angle between the prisms is 110°-130°, the width of the bottom surface of the prism where the triangular prism 2 overlaps with one side of the base film layer 1 is 25um, the angle of the triangular prism 2 away from the base film layer 1 is 110°-130°, the angle of the triangular prism 2 away from the base film layer 1 has a chamfer of 45°, and the height of the triangular prism 2 is 6-15um. Under the action of the triangular prism 2, when the sunlight is incident on the surface of the photovoltaic component gap membrane with a double-sided aluminum layer, most of it will be reflected on the side of the triangular prism 2, and then concentrated and reflected to the photovoltaic power generation area. At the same time, a small part of the light will be directly reflected to the photovoltaic power generation area through its surface, effectively improving the efficiency of light energy utilization and reducing light energy waste, thereby improving the power generation efficiency of photovoltaic panels.

[0036] What is particularly important is that the aluminum layer 4 is used to replace the single-sided gap film of the photovoltaic module in the prior art. The aluminum layer 4 has excellent weather resistance and is not easy to be damaged. While increasing the service life of the gap film, it can also improve the power generation function and appearance of the photovoltaic module.

[0037] like Figure 5 As shown, it is a schematic diagram of the photovoltaic module gap film with double-sided aluminum layer applied between photovoltaic cell modules. Figure 5 It can be seen that the photovoltaic module gap film with double-sided aluminum layer improves the power generation efficiency of photovoltaic panels.

[0038] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A photovoltaic module gap film with a double-sided aluminum layer, characterized in that: include: A photovoltaic module gap film body applied between photovoltaic cell modules, comprising a base film layer, a concave prism structure layer, an aluminum layer and an EVA resin bonding layer, wherein the concave prism structure layer comprises a pattern integrally formed on one side of the base film layer and a concave prism aluminum-plated reflective surface layer arranged on a side of the pattern away from the base film layer, wherein the pattern is formed by a plurality of triangular prisms arranged side by side, the aluminum layer is plated on both sides of the base film layer by an evaporation aluminum plating process or a sputtering aluminum plating process, and the EVA resin bonding layer is bonded to a side of the aluminum layer away from the base film layer, wherein: There is no gap between the prism surfaces of two adjacent triangular prisms that overlap with one side of the base film layer, and all the triangular prisms are arranged parallel to each other. The angle between the triangular prism and the film direction of the base film layer is 72°, and the angle between the triangular prism and the horizontal direction is 16-20°. The thickness of the aluminum layer is 100nm.

2. The photovoltaic module gap film with double-sided aluminum layer according to claim 1, characterized in that: The angle between two adjacent triangular prisms is 110°-130°.

3. The photovoltaic module gap film with double-sided aluminum layer according to claim 2, characterized in that: The width of the bottom surface of the triangular prism overlapping with one side surface of the base film layer is 25um.

4. The photovoltaic module gap film with double-sided aluminum layer according to claim 3, characterized in that: An angle of the triangular prism away from the base film layer is 110°-130°.

5. The gap film according to claim 4, characterized in that: A corner of the triangular prism away from the base film layer has a chamfer, and the chamfer is 20-45°.

6. The gap film according to claim 1, characterized in that: The base film layer is a PET film layer.

7. The photovoltaic module gap film with double-sided aluminum layer according to any one of claims 1 to 5, characterized in that: The height of the triangular prism is 6-15 um.

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