Microstructure prism gap light conversion film

Abstract

The utility model relates to the technical field of photovoltaic modules, and particularly discloses a microstructure prism gap light conversion film, which comprises a light conversion film main body, the light conversion film main body comprises a triangular prism which is arranged at the top of the light conversion film main body and is used for reflecting sunlight, and a UV cut-off layer which is arranged below the triangular prism and is used for intercepting a specified ultraviolet wave band, a UV conversion layer used for conducting light conversion on ultraviolet rays of an unintercepted ultraviolet wave band is arranged below the UV cut-off layer, a PET base layer is arranged below the UV conversion layer, a PVDF film used for protecting a bottom layer is arranged below the PET base layer, an EVA bottom layer is arranged below the PVDF film, and the EVA bottom layer is arranged below the EVA bottom layer. The surface of the UV cut-off layer is evenly coated with absorption powder used for absorbing ultraviolet rays, and the surface of the UV conversion layer is evenly coated with light conversion powder capable of absorbing the ultraviolet rays. According to the utility model, ultraviolet radiation can be effectively absorbed and utilized, so that the photoelectric conversion efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic components, in particular to a micro-structure prism gap light conversion film. Background Art

[0002] The gap film for photovoltaic modules is mainly used to fill the gap between photovoltaic module cells to improve the photoelectric efficiency of solar photovoltaic modules. In order to improve the utilization efficiency of the gap film, a microstructured prism film with a microscopic prism array structure on the surface can be used and placed in the middle of the cell. The microstructured prism gap light-converting film can manage and reflect the sunlight reflected by the front glass to the cell in a directionally controlled manner, thereby helping the module to increase power.

[0003] The reflective surface on the top of the microstructure prism gap light-converting film is mostly a flat structure. The flat reflective surface easily causes part of the light to be directly reflected out, and compared with the direct light directly irradiating the photovoltaic power generation area, the intensity and energy of the reflected parallel light are low, and the utilization efficiency of photovoltaic power generation is low.

[0004] The existing public technical solution, announcement number CN219085989U discloses a gap film for photovoltaic modules. Under the action of the top triangular prism, when the sunlight is incident on its surface, most of it will be reflected on the side of the triangular prism, 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 through its surface to the photovoltaic power generation area, effectively improving the efficiency of light energy utilization and reducing light energy waste, thereby improving the power generation efficiency of photovoltaic panels.

[0005] The gap light conversion film has a high absorption rate for visible light, but a low absorption rate for ultraviolet radiation. Summary of the invention

[0006] The purpose of the utility model is to provide a microstructure prism gap light conversion film, which can effectively absorb and utilize ultraviolet radiation, thereby improving the photoelectric conversion efficiency, so as to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a microstructured prism gap light-converting film, comprising a light-converting film body, wherein the light-converting film body comprises a triangular prism arranged on the top of the light-converting film body for reflecting sunlight, and a UV cut-off layer arranged below the triangular prism for intercepting a specified ultraviolet band, a UV conversion layer for performing light conversion on ultraviolet rays in an ultraviolet band that is not intercepted is arranged below the UV cut-off layer, and a PET base layer is arranged below the UV conversion layer, a PVDF film for protecting a base layer is arranged below the PET base layer, and an EVA base layer is arranged below the PVDF film.

[0008] Preferably, the surface of the UV cutoff layer is uniformly coated with absorbing powder for absorbing ultraviolet rays.

[0009] Preferably, the surface of the UV conversion layer is evenly coated with light conversion powder that can absorb ultraviolet rays.

[0010] Preferably, the triangular prisms are evenly distributed at equal distances along the top of the UV cut-off layer.

[0011] Preferably, the UV conversion layer is fixedly bonded to the PET base layer, and the PET base layer is fixedly bonded to the PVDF film.

[0012] Preferably, a separation line is provided between the two groups of light conversion film bodies.

[0013] Preferably, a winding drum is provided on the surface of the light-converting film body, and a plurality of reinforcing support ribs with a radial structure are provided at both ends of the winding drum along the axial direction, and the light-converting film body is wound on the outer surface of the winding drum.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The UV cut-off layer can absorb and intercept some unnecessary ultraviolet bands through the absorbing powder on the UV cut-off layer, and the usable ultraviolet bands can pass through the UV cut-off layer to reach the UV conversion layer for absorption and use. The cooperation with the UV conversion layer can enable the light conversion film body to effectively absorb and use ultraviolet radiation, thereby improving the photoelectric conversion efficiency;

[0016] 2. By setting a PVDF film on the PET base layer, since the PVDF film has strong UV resistance, it can improve the anti-aging effect of the main body of the light-converting film, thereby playing a certain protective role on the EVA bottom layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is the overall structural view of the utility model;

[0019] Figure 2 It is a cross-sectional enlarged structural schematic diagram of the main body of the light conversion film of the utility model;

[0020] Figure 3 This is a schematic structural diagram of the main body of the light-converting film of the utility model;

[0021] Figure 4It is a schematic diagram of the structure of the UV cut-off layer of the utility model.

[0022] Description of reference numerals:

[0023] 1. Winding drum; 2. Light-converting film body; 3. Dividing line; 4. Triangular prism; 5. UV cut-off layer; 6. UV conversion layer; 7. PET base layer; 8. PVDF film; 9. EVA base layer; 10. Strengthening support ribs; 11. Absorbent powder. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model provides a technical solution:

[0026] See also Figures 2 to 4 A microstructure prism gap light-converting film comprises a light-converting film body 2, the light-converting film body 2 comprises a triangular prism 4 arranged on the top of the light-converting film body 2 for reflecting sunlight, and a UV cut-off layer 5 arranged below the triangular prism 4 for intercepting a specified ultraviolet band, the surface of the UV cut-off layer 5 is uniformly coated with an absorbing powder 11 for absorbing ultraviolet rays, a UV conversion layer 6 for light conversion of ultraviolet rays in an ultraviolet band that is not intercepted is arranged below the UV cut-off layer 5, and a PET base layer 7 is arranged below the UV conversion layer 6, the surface of the UV conversion layer 6 is uniformly coated with light-converting powder that can absorb ultraviolet rays, a PVDF film 8 for protecting the base layer is arranged below the PET base layer 7, and an EVA base layer 9 is arranged below the PVDF film 8, the triangular prisms 4 are evenly distributed along the top of the UV cut-off layer 5 at equal distances, the UV conversion layer 6 is fixedly bonded to the PET base layer 7, and the PET base layer 7 is fixedly bonded to the PVDF film 8.

[0027] By adopting the above technical scheme, the surface of the UV cutoff layer 5 is coated with an absorption powder 11, which can absorb and intercept the ultraviolet band of the specified band. The ultraviolet band that is not intercepted passes through the UV cutoff layer 5 to reach the UV conversion layer 6 below the UV cutoff layer 5, and the ultraviolet rays are absorbed and utilized by the light conversion powder coated on the UV conversion layer 6. The triangular prism 4 can guide the light in a directional manner, and directional light guidance is achieved in combination with the transparent PET base layer 7. Since the PVDF film 8 with high ultraviolet resistance is arranged at the bottom of the PET base layer 7, the overall anti-aging and anti-ultraviolet function of the light conversion film body 2 can be improved, and the yellowing of the EVA base layer 9 can be further avoided.

[0028] Specifically, Figure 1 and Figure 3 As shown, a dividing line 3 is provided between the two groups of light-converting film bodies 2, a winding drum 1 is provided on the surface of the light-converting film body 2, and a plurality of reinforcing support ribs 10 with a radial structure are provided at both ends of the winding drum 1 along the axial direction, and the light-converting film body 2 is wound on the outer surface of the winding drum 1.

[0029] By adopting the above technical solution, a dividing line 3 with a dotted line structure is pressed out on the light-converting film main body 2 by a dotted line machine, and the manufactured light-converting film main body 2 is wound around the winding drum 1 in circles. The reinforced support ribs 10 at both ends of the winding drum 1 can enhance the supporting effect of the winding drum 1 and avoid deformation of the winding drum 1, thereby preventing the light-converting film main body 2 wound on the winding drum 1 from being deformed due to the deformation of the winding drum 1.

[0030] Working principle: the dot-line machine presses out a dividing line 3 of a dot-line structure on the light-converting film body 2, and winds the prepared light-converting film body 2 around the winding drum 1. When in use, the light-converting film body 2 is placed in the middle of the battery cell, which can directionally manage and reflect the sunlight reflected by the front glass to the battery cell, thereby helping the component to increase power. The absorption powder 11 absorbs and intercepts the ultraviolet band of the specified band, and the unintercepted ultraviolet band passes through the UV cutoff layer 5 to reach the UV conversion layer 6 below the UV cutoff layer 5, and the ultraviolet rays are absorbed and utilized by the light-converting powder coated on the UV conversion layer 6. The triangular prism 4 reflects the light and combines with the transparent PET base layer 7 to achieve directional light guidance. Since the PVDF film 8 with high ultraviolet resistance is arranged at the bottom of the PET base layer 7, the overall anti-aging and anti-ultraviolet function of the light-converting film body 2 can be improved, and the yellowing of the EVA base layer 9 can be further avoided.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A microstructured prism gap light-converting film, comprising a light-converting film body (2), characterized in that: The light-converting film body (2) comprises a triangular prism (4) arranged on the top of the light-converting film body (2) for reflecting sunlight, and a UV cut-off layer (5) arranged below the triangular prism (4) for intercepting a specified ultraviolet band, a UV conversion layer (6) for performing light conversion on ultraviolet rays in an ultraviolet band that is not intercepted is arranged below the UV cut-off layer (5), and a PET base layer (7) is arranged below the UV conversion layer (6), a PVDF film (8) for protecting a base layer is arranged below the PET base layer (7), and an EVA base layer (9) is arranged below the PVDF film (8).

2. The microstructured prism gap light conversion film according to claim 1, characterized in that: The surface of the UV cutoff layer (5) is evenly coated with absorbing powder (11) for absorbing ultraviolet rays.

3. The microstructured prism gap light conversion film according to claim 1, characterized in that: The surface of the UV conversion layer (6) is evenly coated with light conversion powder that can absorb ultraviolet rays.

4. The microstructured prism gap light conversion film according to claim 1, characterized in that: The triangular prisms (4) are evenly distributed at equal distances along the top of the UV cutoff layer (5).

5. The microstructured prism gap light conversion film according to claim 1, characterized in that: The UV conversion layer (6) is fixedly bonded to the PET base layer (7), and the PET base layer (7) is fixedly bonded to the PVDF film (8).

6. The microstructured prism gap light conversion film according to claim 1, characterized in that: A separation line (3) is provided between the two groups of light-converting film bodies (2).

7. The microstructured prism gap light conversion film according to claim 1, characterized in that: A winding drum (1) is arranged on the surface of the light-converting film body (2), and a plurality of reinforcing support ribs (10) with a radial structure are arranged at both ends of the winding drum (1) along the axial direction, and the light-converting film body (2) is wound on the outer surface of the winding drum (1).

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