TWM566911U - A solar panel - Google Patents

Abstract

A Solar panel, which has a solar module and a light guide film. The light guide film is putting light guiding material inside of an adhesive layer of anti-reflection film whose surface may be micro-structural modified by sculpture, laser carving, etching or imprint such as PET, PE, PVC, EVA, PVB, TPU, PS, PP, OP, OPP film, then stick this film on the glass side of solar module to increase electricity by decreasing solar module's reflection rate, expanding effective light entrance angle and increasing more light into solar module in natural environment.

Description

Solar panel

The present invention relates to a solar panel, and more particularly to a solar panel that can introduce more light sources.

Among all renewable energy sources, sunlight is an ideal alternative energy source with its inexhaustible and inexhaustible characteristics. The development of the solar cell industry is also rapidly emerging. In order to extend the life of outdoor solar cells to operate outdoors for at least 20 to 30 years, a fairly mature solar module (SOLAR MODULE) has been developed on the market.

FIG. 1 is a schematic cross-sectional view of a conventional solar module 1. A common solar module 1 structure includes a back protective layer 11, a first encapsulating material layer 12, a solar cell 13, a second encapsulating material layer 14, and a glass layer 15. Wherein, the glass layer 15 has an upper surface 151, and the upper surface 151 is a solar light receiving surface. Therefore, it must have sufficient light transmittance and heat resistance, and can absorb solar radiation to enable the solar module 1 to be collected to the utmost extent. And use the sun.

However, the solar light that solar modules can collect and use is limited. 2 is a schematic diagram of an effective incident light angle (θ) of a common solar module 1. As shown in FIG. 2, the glass layer 15 of the solar module 1 has an effective light incident angle θ, which is the angle between the incident ray of the sunlight and the normal of the interface of the glass layer 15 (the incident angle is the angle between the incident ray and the normal line, which is a technique). It is well known in the art to those of ordinary skill). In general, the effective light incident angle θ ranges from 0° to 22°. When the sunlight enters the solar module 1 in the form of direct light (ie, θ = 0), the solar module 1 can achieve the best light absorption rate; however, if the sunlight is affected by geographical location and/or climatic factors, When the incident angle is outside the range of the effective light incident angle θ, the sunlight cannot be effectively collected and utilized by the solar module 1 due to reflection, thereby causing the disadvantage that the solar light utilization rate is low.

Based on the above, the creators believe that it is necessary to provide a streamlined structural design to reduce the reflectivity of the glass layer and expand the range of effective light incident angles, so that more light sources can be introduced into the solar module to enhance the utilization of sunlight. Increase the amount of power generated by solar modules in the natural environment to promote the further popularization of the solar industry.

The present application provides a solar panel comprising a solar module; a film substrate having a first surface and a second surface, the first surface being a solar receiving surface; and an adhesive layer, an adhesive layer The second surface is bonded to the surface of the solar module for attaching and fixing the film substrate.

According to the above concept, the solar module includes: a back protective layer, a first encapsulating material layer, a solar cell, a second encapsulating material layer, and a glass layer.

According to the above concept, the film substrate is bonded to the adhesive layer to form a light guiding film.

According to the above concept, the light guiding film is attached to the upper surface of the glass layer of the solar module for increasing the light absorption and anti-reflection capability of the solar module.

According to the above concept, the film substrate is an antireflection film having light transmissivity and heat resistance.

According to the above concept, wherein the film substrate is selected from the group consisting of polyethylene terephthalate (PET), polyethylene (PE), polyvinyl chloride (PolyVinyl Chloride, PVC), ethylene/vinyl acetate copolymer. (Ethylene Vinyl Acetate, EVA), Polyvinyl Butyral Resin (PVB), Thermoplastic Polyurethane (TPU), Polystyrene (PS), Polypropylene (Polypropylene, PP), Biaxially-oriented polypropylene film (OPPP or Oriented polypropylene, OP), Oriented polypropylene (OPP) film.

According to the above concept, the adhesive layer has a single layer structure and has light guiding property and anti-reflection ability.

According to the above concept, the adhesive layer is a light guiding rubber.

According to the above concept, the adhesive layer is selected from the group consisting of polyvinyl butyral (PVB), polymethyl methacrylate (PMMA), and ethylene/vinyl acetate copolymer (Ethylene Vinyl Acetate, EVA). ).

In order to clearly describe the technical features of the creation, the drawings of the creation are not drawn according to the actual size ratio or angular size. The content described in the embodiments and the drawings is an embodiment showing the creation of the present invention so that the features and advantages of the present invention can be more clearly understood. Unless otherwise defined, all technical and scientific terms used in the present application are the same as those of ordinary skill in the art.

FIG. 3 is a schematic cross-sectional view showing a solar panel 3 according to an embodiment of the present invention. The solar panel 3 includes a solar module 1 and a light guiding film 2 . The solar module 1 includes a back surface protective layer 11, a first encapsulating material layer 12, a solar cell 13, a second encapsulating material layer 14, and a glass layer 15, and the glass layer 15 has an upper surface 151. The light guiding film 2 comprises a film substrate 21 and an adhesive layer 22. The film substrate 21 has a first surface 211 and a second surface 212. The first surface 211 is a solar receiving surface, and the second surface 212 is an adhesive layer. 22 combined. The adhesive layer 22 is used to attach and fix the film substrate 21 to the surface of the solar module 1 .

As shown in FIG. 3, the light guiding film 2 is attached and fixed to the surface of the solar module 1, and more specifically, is attached to the upper surface 151 of the glass layer 15 of the solar module 1 for adding a solar module. 1 light absorption and anti-reflection ability.

In some embodiments, the backside protective layer 11 includes, but is not limited to, a DuPont® TEP® PEP film; the first encapsulating material layer 12 and the second encapsulating material layer 14 include, but are not limited to, an ethylene-vinyl acetate copolymer. (Ethylene Vinyl Acetate, EVA); solar cell 13 includes, but is not limited to, a silicon substrate material solar cell; glass layer 15 includes, but is not limited to, a low iron ion glass layer.

In some embodiments, the film substrate 21 is an anti-reflection film having heat resistance and light transmission. In some embodiments, the film substrate 21 is an antireflective film that has been subjected to microstructure treatment such as engraving, laser etching, etching, or embossing. In other embodiments, the film substrate 21 includes, but is not limited to, polyethylene terephthalate (PET), polyethylene (PE), polyvinyl chloride (PolyVinyl Chloride, PVC), ethylene/ Ethylene Vinyl Acetate (EVA), Polyvinyl Butyral Resin (PVB), Thermoplastic Polyurethane (TPU), Polystyrene (Polystyrene, PS), Polypropylene (PP), Biaxially-oriented polypropylene film (OPPP or Oriented polypropylene, OP), Oriented polypropylene (OPP) and other films.

In some embodiments, the adhesive layer 22 is a single layer structure having light guiding and anti-reflective capabilities. In another embodiment, the adhesive layer 22 is a light guiding compound. In still other embodiments, the composition of the adhesive layer 22 includes, but is not limited to, polymethyl methacrylate (PMMA), polyvinyl butyral (PVB), ethylene/vinyl acetate copolymer. (Ethylene Vinyl Acetate, EVA).

4 is a schematic diagram of an effective light incident angle (θ) of a light guiding film applied to a solar module according to an embodiment of the present invention. As shown in FIG. 4, the light guiding film 2 is attached and fixed to the upper surface 151 of the glass layer 15 of the solar module 1, and the effective light incident angle θ can be expanded from 0° to 22° to 0° to 45. °, the reflectance of the glass layer 15 is lowered, and the sunlight of a large incident angle is introduced into the glass layer 15, and the light absorption rate of the solar module 1 is increased and the amount of power generation is increased. The test method is as follows:

Prepare inspection equipment

In some embodiments, two 2V polycrystalline silicon solar modules are prepared, one of which is affixed with a light guiding film for the experimental group, and the other is a control group; a standard light source (450W quartz lamp, 1000 lux) is prepared. ) to simulate sunlight; and prepare a photovoltaic detector (PROVA-200) to measure the amount of power generated by the solar module.

Verify the effective light incident angle range of the light guide film applied to the solar module

5(a)-(e) are schematic views showing the incident angle of light of the inspection method of an embodiment of the present invention. In some embodiments, as shown in Figures 5(a)-(e), the experimental group and the control group are placed on a standard light source at light incident angles of 0, 30, 45, 60, and 90, respectively. And measure the amount of power generated at each angle, and the results of the recording are shown in Table 1 below.

Table 1, the experimental group and the control group are placed on the standard light source at the light incident angles of 0°, 30°, 45°, 60°, and 90°, respectively, and the measurement results of the power generation at various angles are measured.  <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> Light incident angle </td><td> Experimental group (solar module + light guide film) </td><td> Control group (solar module) </td></tr><tr><td> Power generation W </td><td> % of power generation </td><td > Power generation W </td><td> % of power generation </td></tr><tr><td> 0° </td><td> 4.055 </td><td> 100 < /td><td> 4.273 </td><td> 100 </td></tr><tr><td> 30° </td><td> 3.705 </td><td> 91.4 </td ><td> 3.820 </td><td> 89.4 </td></tr><tr><td> 45° </td><td> 3.203 </td><td> 79 </td>< Td> 3.208 </td><td> 75.1 </td></tr><tr><td> 60° </td><td> 2.341 </td><td> 57.7 </td><td> 2.738 </td><td> 64.1 </td></tr><tr><td> 90° </td><td> 0.461 </td><td> 11.4 </td><td> 0.543 < /td><td> 12.7 </td></tr></TBODY></TABLE>

test result

In some embodiments, the experimental group (attaching the light guiding film on the surface of the solar module) has a light guiding effect and power generation capacity superior to the control group (solar module) when the light incident angle is between 0° and 45°. .

Since the effective light incident angle θ of the general solar module 1 is 0° to 22°, so that the utilization of sunlight is limited, the amount of power generation is also limited. The solar panel 3 of the present invention is attached with a light guiding film 2 on the upper surface 151 of the glass layer 15 of the solar module 1, wherein the light guiding film 2 is on the film substrate 21 (antireflection film, such as: Adhesive layer 22 (light guide adhesive) coated on microstructures such as PET, PE, PVC, EVA, PVB, TPU, PS, PP, OP, OPP, etc., such as engraving, laser engraving, etching or embossing The material, or a single layer structure of components such as PMMA, PVB, EVA, etc., reduces the reflectivity of the glass layer 15 by the structure of the solar module 1, the film substrate 21 and the adhesive layer 22, so that the incident angle is between 22 The sunlight of °~45° can also be introduced into the glass layer 15.

Based on the above, the present invention provides a solar panel structure capable of reducing the reflectance of light, increasing the light absorption rate of the solar module, and expanding the effective light incident angle θ of the solar module to 0° to 45°, so that more The light source can be introduced to enhance the utilization of sunlight, thereby increasing the power generation of the solar module in the natural environment and promoting the further popularization of the solar industry.

1‧‧‧Solar module

11‧‧‧Back protective layer

12‧‧‧First encapsulating material layer

13‧‧‧Solar battery

14‧‧‧Second packaging material layer

15‧‧‧ glass layer

151‧‧‧ upper surface

2‧‧‧Light guide film

21‧‧‧ Film substrate

211‧‧‧ first surface

212‧‧‧ second surface

22‧‧‧Adhesive layer

3‧‧‧ solar panels

θ, θ'‧‧‧ effective light incident angle

FIG. 1 is a schematic cross-sectional view of a conventional solar module.

Figure 2 is a schematic diagram of the effective light incident angle (θ) of a typical solar module.

FIG. 3 is a schematic cross-sectional structural view of a solar panel according to an embodiment of the present invention.

Fig. 4 is a schematic view showing an effective light incident angle (θ) of a solar panel according to an embodiment of the invention.

Fig. 5(a) is a schematic view showing a light incident angle (0°) of the inspection method according to an embodiment of the invention.

Fig. 5(b) is a schematic view showing the light incident angle (30°) of the inspection method of an embodiment.

Fig. 5(c) is a schematic view showing the light incident angle (45°) of the inspection method of an embodiment.

Fig. 5(d) is a schematic view showing the light incident angle (60°) of the inspection method of an embodiment.

Fig. 5(e) is a schematic view showing the light incident angle (90°) of the inspection method of an embodiment.

Claims (9)

A solar panel comprising: a solar module; a film substrate having a first surface and a second surface, the first surface being a solar receiving surface; and an adhesive layer The adhesive layer is bonded to the second surface for attaching and fixing the film substrate to the surface of the solar module. The solar panel of claim 1, wherein the film substrate is combined with the adhesive layer to form a light guiding film. The solar panel of claim 2, wherein the light guiding film is attached to a glass layer of the solar module. The solar panel of any one of claims 1-3, wherein the solar module further comprises: a back protective layer, a first encapsulating material layer, a solar cell, and a second encapsulating material layer. The solar panel of claim 1, wherein the film substrate is an antireflection film. The solar panel of claim 1 or 5, wherein the film substrate is selected from the group consisting of polyethylene terephthalate (PET), polyethylene (PE), and polyvinyl chloride (polyvinyl chloride). PolyVinyl Chloride, PVC), Ethylene Vinyl Acetate (EVA), Polyvinyl Butyral Resin (PVB), Thermoplastic Polyurethane (TPU) ), polystyrene (PS), polypropylene (Polypropylene, PP), Biaxially-oriented polypropylene film (OPPP or Oriented polypropylene, OP), Oriented polypropylene (OPP) film. The solar panel of claim 1, wherein the adhesive layer is a single layer structure. The solar panel of claim 1 or 7, wherein the adhesive layer is a light guiding compound. The solar panel of claim 1 or 7, wherein the adhesive layer is selected from the group consisting of polyvinyl butyral (PVB), polymethyl methacrylate (PMMA), Ethylene Vinyl Acetate (EVA).