Structural film for controlling photovoltaic gap reflection efficiency

Abstract

The utility model discloses a structural film for controlling photovoltaic gap reflection efficiency, particularly relates to the technical field of structural films, and comprises a reflective film, the reflective film is positioned between two adjacent power generation cell panels, the reflective film comprises a base material, a plurality of prism structures are arranged on the upper plane of the base material, and the prism structures are arranged on the upper plane of the base material. The prism structure is a strip-shaped protrusion with a triangular cross section, the prism structure on the base material is evenly divided into a left part and a right part, and the two parts of the prism structure are symmetrically arranged. According to the utility model, the prism structure on the upper surface of the base material is uniformly divided into the left part and the right part, so that light rays are only reflected on the closer power generation cell panel and are not reflected for multiple times, light ray loss caused by the reflection is avoided, the reflection efficiency of the light rays is further improved on the basis of the prior art, and the service life of the power generation cell panel is prolonged. And the power generation efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of structural films, in particular to a structural film for controlling the reflection efficiency of a photovoltaic gap. Background Art

[0002] With the increasing depletion of fossil energy, the application scope of clean energy such as wind energy and solar energy has gradually expanded. Among them, photovoltaic equipment must be used when using solar energy to generate electricity.

[0003] The core component of photovoltaic equipment is the solar panel. In order to facilitate production and processing, as well as ease of use, the solar panels of photovoltaic equipment in the existing technology are not a whole piece, but are made up of multiple small-sized solar panels spliced ​​together. There will inevitably be a gap between two adjacent panels, and the light shining through the gap cannot be used, thereby reducing the power generation efficiency of the photovoltaic equipment.

[0004] In the prior art, a reflective structure film is provided in the gap to reflect the light incident on the gap and then illuminate the surface of the solar cell panel, thereby improving the utilization rate of the light.

[0005] However, the reflective structure film in the existing technology cannot regulate the direction of light reflection. After the light is irradiated on its surface, it will be reflected in the left and right directions respectively. If the light reflected in one direction is far away from the solar cell panel on that side, it will not be able to be directly reflected to the solar cell panel on that side. It needs to go through multiple reflections. During the multiple reflections, the light will be lost, resulting in a decrease in the utilization rate of the light. Therefore, the efficiency of the reflective structure film in the existing technology for light reflection needs to be improved. Utility Model Content

[0006] The purpose of the utility model is to provide a structural film for controlling the reflection efficiency of the photovoltaic gap. By evenly dividing the prism structure on the upper surface of the substrate into two parts, the light will only be reflected on the power generation panel that is closer, and will not undergo multiple reflections, thus avoiding the loss of light caused by this, and further improving the reflection efficiency of light on the basis of the existing technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions: a structural film for controlling the reflection efficiency of photovoltaic gaps, used to increase the power generation efficiency of power generation panels, comprising a reflective film positioned between two adjacent power generation panels, the reflective film comprising a substrate, the upper surface of the substrate being provided with a plurality of prism structures, the prism structures reflecting light incident on the gaps between the power generation panels so that the light can ultimately reach the power generation panels, thereby preventing the light from being wasted and improving power generation efficiency;

[0008] The prism structure is a strip-shaped protrusion with a triangular cross-section. When light hits the slope of the plane on the prism structure, it will be reflected. The prism structure on the substrate is evenly divided into two parts, left and right. The two parts of the prism structure are symmetrically arranged. The prism structure on the left reflects all the light to the left, and the prism structure on the right reflects all the light to the right. In this way, the light is reflected to the power generation panel on the corresponding side, without increasing the reflection path of the light and reducing the loss of light during the reflection process.

[0009] An upper protective layer is provided on the surface of the prism structure, and a lower protective layer is provided on the bottom end of the substrate. The upper protective layer and the lower protective layer have the same structure, and both the upper protective layer and the lower protective layer have the function of reflecting light, which makes the reflective film have a reflective effect on both the top and the bottom, achieving the purpose of double-sided reflection.

[0010] Furthermore, a lower glass is provided at the bottom of the power generation panel, an upper glass is provided on the top of the lower glass, and EVA is provided at the bottom of the upper glass. The power generation panel is located between the EVA and the lower glass. In the field of photovoltaic power generation, the power generation panel is designed as a plurality of small blocks, and each power generation panel is neatly arranged between the upper glass and the lower glass. The top of the power generation panel is in contact with the EVA, and there will inevitably be gaps between any two adjacent power generation panels, and the reflective film is filled in these gaps.

[0011] Furthermore, the upper protective layer includes a reflective layer sprayed on the upper surface of the prism structure, a transparent heat-insulating coating is sprayed on the top of the reflective layer, a transparent anti-oxidation coating is sprayed on the top of the transparent heat-insulating coating, and a transparent wear-resistant coating is sprayed on the top of the transparent anti-oxidation coating. The reflective layer can be silver-plated or aluminum-plated, so that the reflective film has a silvery-white surface, which is convenient for reflecting light;

[0012] The main component of the transparent heat-insulating coating is indium tin oxide, which has excellent light transmittance and can also block infrared rays, playing a heat-insulating role and reducing the adverse effects of high temperature on the reflective film. The main component of the transparent anti-oxidation coating is polysilazane, which has excellent thermal stability, mechanical and chemical stability, as well as high hardness and adhesion. It can protect the reflective layer and reflective film, delay the aging rate of both, and extend the service life. The main component of the transparent wear-resistant coating is polyurethane, which has excellent anti-corrosion and wear resistance, and protects the upper protective layer as a whole and the reflective film.

[0013] Furthermore, the arrangement direction of the reflective layer, the transparent heat-insulating coating, the transparent anti-oxidation coating and the transparent wear-resistant coating in the lower protective layer is opposite to that of the upper protective layer.

[0014] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0015] 1. By evenly dividing the prism structure on the upper surface of the substrate into two parts, the prism structure on the left side will only reflect light to the left, and the prism structure on the right side will only reflect light to the right. Light will only be reflected on the nearest power generation panel without multiple reflections, thus avoiding light loss. On the basis of existing technology, the light reflection efficiency is further improved, which further improves the power generation efficiency.

[0016] 2. By setting a lower protective layer at the bottom of the reflective film, the purpose of double-sided reflection is achieved, preventing some light from directly penetrating the substrate, thereby further improving the utilization rate of light and the power generation efficiency of the power generation panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a cross-sectional view of a structural membrane of the prior art;

[0019] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0020] Figure 3 It is a cross-sectional view of the utility model;

[0021] Figure 4 This is a cross-sectional view of the reflective film of the present utility model;

[0022] Figure 5 This is a cross-sectional view of the upper protective layer of the present invention.

[0023] Description of reference numerals:

[0024] 1. Upper glass; 2. Lower glass; 3. EVA; 4. Power generation cell panel; 5. Reflective film; 501. Base material; 502. Prism structure; 6. Upper protective layer; 601. Reflective layer; 602. Transparent heat-insulating coating; 603. Transparent anti-oxidation coating; 604. Transparent wear-resistant coating; 7. Lower protective layer. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] The utility model provides Figure 1-5A structural film for controlling the reflection efficiency of photovoltaic gaps is shown, which is used to increase the power generation efficiency of power generation panels 4. The reflective film 5 is located between two adjacent power generation panels 4. The reflective film 5 includes a substrate 501, and a plurality of prism structures 502 are provided on the upper surface of the substrate 501. The prism structures 502 reflect light that is incident on the gaps between the power generation panels 4 so that it can ultimately reach the power generation panels 4. Therefore, this light is not wasted, thereby improving power generation efficiency.

[0027] The bottom end of the power generation cell panel 4 is provided with a lower glass 2, the top of the lower glass 2 is provided with an upper glass 1, the bottom end of the upper glass 1 is provided with EVA3, and the power generation cell panel 4 is located between the EVA3 and the lower glass 2. In the field of photovoltaic power generation, the power generation cell panel 4 is designed to be a plurality of small blocks, and each power generation cell panel 4 is neatly arranged between the upper glass 1 and the lower glass 2. The top of the power generation cell panel 4 is in contact with the EVA3, and there will inevitably be gaps between any two adjacent power generation cell panels 4, and the reflective film 5 is filled in these gaps.

[0028] Example 1

[0029] Since the light irradiated on the gap of the power generation battery panel 4 will be wasted, a reflective film 5 is set at the gap in the prior art, such as Figure 1 、 2 As shown, the prism structure 502 on the upper surface of the substrate 501 reflects the light irradiating the gap, thereby reducing the waste of light in the gap;

[0030] The cross-section of the prism structure 502 in the prior art is an isosceles triangle, and its upper surface is two symmetrical slopes. When light is irradiated on the upper surface of the prism structure 502, the two slopes will reflect the light in two different directions to the left and right. If the left side of the prism structure 502 is closer to the power generation panel 4, the light reflected to the left can be directly reflected to the power generation panel 4 on the left, while it is farther away from the power generation panel 4 on the right, and the light reflected to the right needs to be reflected multiple times before it can reach the power generation panel 4 on the right. During the multiple reflections, the light is lost. The same applies if the right side of the prism structure 502 is closer to the power generation panel 4.

[0031] In order to standardize the direction of light reflection, such as Figure 3 、 4As shown, the prism structure 502 is a strip-shaped protrusion with a triangular cross-section. When light is irradiated on the slope of the upper plane of the prism structure 502, it will be reflected. The prism structure 502 on the substrate 501 is evenly divided into two parts, the left and right parts. The two prism structures 502 are symmetrically arranged. The prism structure 502 on the left reflects all the light to the left, and the prism structure 502 on the right reflects all the light to the right. In this way, the light is reflected to the power generation panel 4 on the corresponding side, without increasing the reflection path of the light and reducing the loss of light during the reflection process.

[0032] Example 2

[0033] The prism structure 502 on the upper surface of the substrate 501 is evenly divided into two parts, the cross section of the prism structure 502 is no longer an isosceles triangle, as shown in FIG. Figure 4 As shown, the top of the prism structure 502 on the left is offset to the right, and the top of the prism structure 502 on the right is offset to the left. Taking the prism structure 502 on the left as an example, its upper surface has only a slope toward the left for reflecting light, so the light will only be reflected to the power generation panel 4 on the left which is closer. In this way, for all the prism structures 502, the prism structure 502 on the left will only reflect light to the left, and the prism structure 502 on the right will only reflect light to the right. The light will only be reflected on the power generation panel 4 which is closer, and will not undergo multiple reflections, thus avoiding the loss of light. On the basis of Example 1, the reflection efficiency of light is further improved, and the power generation efficiency is further improved.

[0034] In order to prevent light from penetrating the substrate 501, as Figure 4 、 5 As shown, an upper protective layer 6 is provided on the surface of the prism structure 502, and a lower protective layer 7 is provided on the bottom end of the substrate 501. The upper protective layer 6 and the lower protective layer 7 have the same structure, and both the upper protective layer 6 and the lower protective layer 7 have the function of reflecting light, which makes the reflective film 5 have a reflective effect on both the top and the bottom, achieving the purpose of double-sided reflection, avoiding part of the light from directly penetrating the substrate 501, thereby further improving the utilization rate of light and the power generation efficiency of the power generation panel 4 on the basis of Example 2.

[0035] The upper protective layer 6 includes a reflective layer 601 sprayed on the upper surface of the prism structure 502. The top of the reflective layer 601 is sprayed with a transparent heat-insulating coating 602, the top of the transparent heat-insulating coating 602 is sprayed with a transparent anti-oxidation coating 603, and the top of the transparent anti-oxidation coating 603 is sprayed with a transparent wear-resistant coating 604. The reflective layer 601 can be silver-plated or aluminum-plated, so that the reflective film 5 has a silvery-white surface to facilitate light reflection. The arrangement direction of the reflective layer 601, the transparent heat-insulating coating 602, the transparent anti-oxidation coating 603, and the transparent wear-resistant coating 604 in the lower protective layer 7 is opposite to that of the upper protective layer 6.

[0036] The main component of the transparent heat-insulating coating 602 is indium tin oxide, which has excellent light transmittance and can also block infrared rays, thus playing a heat-insulating role and reducing the adverse effects of high temperature on the reflective film 5. The main component of the transparent anti-oxidation coating 603 is polysilazane, which has excellent thermal stability, mechanical and chemical stability, as well as high hardness and adhesion. It can protect the reflective layer 601 and the reflective film 5, delay the aging rate of both, and extend the service life. The main component of the transparent wear-resistant coating 604 is polyurethane, which has excellent anti-corrosion and wear resistance, and plays a protective role for the upper protective layer 6 as a whole and the reflective film 5.

[0037] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A structural film for controlling the reflection efficiency of a photovoltaic gap, used to increase the power generation efficiency of a power generation battery panel (4), comprising a reflective film (5), wherein the reflective film (5) is located between two adjacent power generation battery panels (4), and characterized in that: The reflective film (5) comprises a substrate (501), and a plurality of prism structures (502) are provided on an upper plane of the substrate (501); The prism structure (502) on the substrate (501) is evenly divided into two parts, the left and the right. The two parts of the prism structure (502) are symmetrically arranged. The prism structure (502) on the left reflects all light to the left, and the prism structure (502) on the right reflects all light to the right.

2. The structural film for controlling photovoltaic gap reflection efficiency according to claim 1, characterized in that: The prism structure (502) is a strip-shaped protrusion with a triangular cross section.

3. The structural film for controlling photovoltaic gap reflection efficiency according to claim 1, characterized in that: An upper protective layer (6) is provided on the surface of the prism structure (502), and a lower protective layer (7) is provided at the bottom end of the substrate (501), and the upper protective layer (6) and the lower protective layer (7) have the same structure.

4. The structural film for controlling photovoltaic gap reflection efficiency according to claim 1, characterized in that: The bottom end of the power generation cell panel (4) is provided with a lower glass (2), the top of the lower glass (2) is provided with an upper glass (1), the bottom end of the upper glass (1) is provided with an EVA (3), and the power generation cell panel (4) is located between the EVA (3) and the lower glass (2).

5. The structural film for controlling photovoltaic gap reflection efficiency according to claim 3, characterized in that: The upper protective layer (6) comprises a reflective layer (601) sprayed on the upper surface of the prism structure (502), a transparent heat-insulating coating (602) sprayed on the top of the reflective layer (601), a transparent anti-oxidation coating (603) sprayed on the top of the transparent heat-insulating coating (602), and a transparent wear-resistant coating (604) sprayed on the top of the transparent anti-oxidation coating (603).

6. The structural film for controlling photovoltaic gap reflection efficiency according to claim 5, characterized in that: The arrangement direction of the reflective layer (601), the transparent heat-insulating coating (602), the transparent anti-oxidation coating (603) and the transparent wear-resistant coating (604) in the lower protective layer (7) is opposite to that of the upper protective layer (6).

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