Photovoltaic modules

Abstract

The present application provides a photovoltaic module, since the light absorption array layer is arranged on the first surface, when the same incident light is irradiated to the first substrate, the light absorption array layer can make the incident light refracted to the first substrate much larger than the light refracted to the first substrate when the light absorption array layer is not arranged. By arranging the light absorption array layer on the first surface, the amount of incident light entering the first substrate can be increased, so that natural sunlight can be fully utilized. At the same time, through a plurality of spaced-apart convex structures, the incident light can be double-refracted, and a portion of the reflected light can also be refracted into the first substrate, so that more incident light enters the solar cell panel. Therefore, by arranging a plurality of spaced-apart convex structures on the first surface of the first substrate, the amount of incident light on the solar cell panel can be increased, effectively reducing light loss and improving the output power of the photovoltaic module.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic power generation, and in particular to a photovoltaic module. Background Art

[0002] Photovoltaic power generation is a form of power generation in the field of new energy and is increasingly widely used. How to improve the efficiency and power of photovoltaic modules and reduce production costs has become a major issue in the development of the photovoltaic industry. Photovoltaic modules are formed by front glass, EVA, solar cells, EVA, several welding strips, and back panels or back glass through lamination packaging to prevent solar cells from being oxidized by contact with air and reducing power generation efficiency.

[0003] However, after the light enters the module, some of it will leak out of the module due to reflection from the cells and the backplane in the gap between cells, and will not be used. In addition, packaging loss will occur after packaging, as the packaging material reflects and absorbs the incident sunlight, reducing the amount of light entering the solar cell and lowering the conversion efficiency of the photovoltaic module. Summary of the invention

[0004] Based on this, it is necessary to provide a photovoltaic module that can effectively reduce light loss and increase the output power of the photovoltaic module in order to address the light loss problem caused by the current photovoltaic module packaging.

[0005] The present application provides a photovoltaic assembly including a first substrate, a solar cell panel and a light absorption array layer. The first substrate has a first surface and a second surface opposite to the first surface. The solar cell panel overlaps with the first substrate and is attached to the second surface. The light absorption array layer is arranged on the first surface, and the light absorption array layer includes a plurality of convex structures arranged at intervals.

[0006] In one embodiment, each of the protruding structures includes a first light absorption structure and a plurality of second light absorption structures. The first light absorption structure is disposed on the first surface, and the first light absorption structure has a plurality of side surfaces. The plurality of second light absorption structures are disposed on the side surfaces.

[0007] In one embodiment, a plurality of the second light absorbing structures are disposed on each of the side surfaces.

[0008] In one embodiment, the first light absorbing structure is a pyramid.

[0009] In one embodiment, the second light absorbing structure is a pyramid.

[0010] In one embodiment, each of the first light absorption structures has a different size, each of the second light absorption structures has a different size, and the size of the first light absorption structure is larger than the size of the second light absorption structure.

[0011] In one embodiment, the height of the first light absorbing structure is 0.1 mm to 0.5 mm.

[0012] In one embodiment, the height of the second light absorbing structure is 0.025 mm to 0.125 mm.

[0013] In one embodiment, the solar cell panel includes a plurality of battery chips, and the plurality of battery chips are connected in series.

[0014] In one embodiment, the photovoltaic module further comprises a second substrate, a first adhesive layer and a second adhesive layer. The second substrate is overlapped with a surface of the solar panel away from the first substrate. The first adhesive layer is disposed between the first substrate and the solar panel to bond the first substrate to the solar panel. The second adhesive layer is disposed between the solar panel and the second substrate to bond the solar panel to the second substrate.

[0015] The present application provides a photovoltaic module, wherein the first surface is the surface of the first substrate facing away from the solar panel, and the second surface is the surface facing the solar panel. Since the light absorption array layer is arranged on the first surface, when the same incident light is irradiated to the first substrate, the light refracted to the first substrate by the light absorption array layer can be much greater than the light refracted to the first substrate when the light absorption array layer is not arranged. By arranging the light absorption array layer on the first surface, the amount of incident light entering the first substrate can be increased, so that natural sunlight can be fully utilized.

[0016] At the same time, through the multiple convex structures arranged at intervals, the incident light can be double-refracted, and a part of the reflected light can also be refracted into the first substrate, so that more incident light enters the solar cell panel. Therefore, by arranging multiple convex structures arranged at intervals on the first surface of the first substrate, the amount of incident light on the solar cell panel can be increased, effectively reducing light loss and improving the output power of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of the photovoltaic module provided for this application;

[0018] Figure 2A schematic diagram of the cross-sectional structure of the overall structure of the photovoltaic module provided in this application;

[0019] Figure 3 A schematic diagram of the overall structure of the first substrate and the light absorbing array layer of the photovoltaic module provided in this application;

[0020] Figure 4 A schematic diagram of the cross-sectional structure of the first substrate and the light-absorbing array layer of the photovoltaic module provided in this application;

[0021] Figure 5 A schematic diagram of the structure of the protruding structure of the photovoltaic module provided in this application;

[0022] Figure 6 A schematic diagram of the incident light path of the photovoltaic module provided in this application;

[0023] Figure 7 A schematic structural diagram of a first light-absorbing structure of a photovoltaic module provided in this application;

[0024] Figure 8 A schematic diagram of the structure of the second light-absorbing structure of the photovoltaic module provided in this application;

[0025] Fig. 9 A schematic top view of the raised structure of the photovoltaic module provided in the present application.

[0026] Description of Reference Numerals

[0027] Photovoltaic component 100, first substrate 10, first surface 110, second surface 120, solar cell panel 20, light absorption array layer 30, protrusion structure 310, first light absorption structure 311, side surface 312, second light absorption structure 313, battery chip 210, second substrate 40, first bonding layer 50, second bonding layer 60. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of this application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application 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, and therefore cannot be understood as a limitation to this application.

[0030] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] See also Figure 1-3 The present application provides a photovoltaic module 100 including a first substrate 10, a solar cell panel 20 and a light absorption array layer 30. The first substrate 10 has a first surface 110 and a second surface 120 opposite to the first surface 110. The solar cell panel 20 is overlapped with the first substrate 10 and attached to the second surface 120. The light absorption array layer 30 is disposed on the first surface 110. The light absorption array layer 30 includes a plurality of convex structures 310 disposed at intervals.

[0032] The first surface 110 is the surface of the first substrate 10 facing away from the solar panel 20, and the second surface 120 is the surface facing the solar panel 20. Since the light absorption array layer 30 is arranged on the first surface 110, when the same incident light is irradiated to the first substrate 10, the light refracted to the first substrate 10 by the light absorption array layer 30 is much greater than the light refracted to the first substrate 10 when the light absorption array layer 30 is not arranged. By arranging the light absorption array layer 30 on the first surface 110, the amount of incident light entering the first substrate 10 can be increased, so that natural sunlight can be fully utilized. At the same time, through the multiple convex structures 310 arranged at intervals, the incident light can be refracted or reflected in multiple layers, so that the sunlight is fully utilized after being reflected or refracted multiple times, and a part of the reflected light can be refracted into the first substrate 10, so that more incident light enters the solar panel 20. Therefore, by providing a plurality of the protruding structures 310 spaced apart on the first surface 110 of the first substrate 10 , the amount of incident light on the solar cell panel 20 can be increased, thereby effectively reducing light loss and improving the output power of the photovoltaic module 100 .

[0033] See also Figure 4-6 In one embodiment, each of the protruding structures 310 includes a first light absorption structure 311 and a plurality of second light absorption structures 313. The first light absorption structure 311 is disposed on the first surface 110, and the first light absorption structure 311 has a plurality of side surfaces 312. The plurality of second light absorption structures 313 are disposed on the side surfaces 312.

[0034] The size of the first light absorbing structure 311 is larger than that of the second light absorbing structure 313. The light absorbing array layer 30 includes a plurality of convex structures 310 arranged at intervals, that is, a plurality of the first light absorbing structures 311 are uniformly arranged on the first surface 110 in the form of an array to form an array structure. The plurality of second light absorbing structures 313 are arranged on the side surface 312 to receive incident light from different directions. When the incident light is refracted or reflected, the light reflected or refracted by the incident light can be received by the plurality of the first light absorbing structures 311 and the plurality of the second light absorbing structures 313 to achieve multiple refractions or reflections, so that the sunlight is fully utilized after being reflected or refracted multiple times, thereby increasing the light entering the first substrate 10. Therefore, the incident light can be refracted in multiple layers by the plurality of the first light absorbing structures 311 and the plurality of the second light absorbing structures 313, thereby increasing the amount of incident light entering the solar cell panel 20, effectively reducing light loss, and improving light utilization.

[0035] In one embodiment, each of the first light absorption structures 311 has a different size, each of the second light absorption structures 313 has a different size, and the size of the first light absorption structure 311 is larger than the size of the second light absorption structure 313 .

[0036] The sizes of each first light absorption structure 311 , each second light absorption structure 313 and each protrusion structure 310 may be the same or different. Since the size of the first light absorption structure 311 is larger than that of the second light absorption structure 313 , the plurality of second light absorption structures 313 may be disposed on the side surface 312 .

[0037] See also Figure 7-9 In one embodiment, each of the side surfaces 312 is provided with a plurality of the second light absorbing structures 313 .

[0038] When the incident light is refracted or reflected, the incident light can be reflected and refracted by the plurality of the second light absorbing structures 313 on each of the side surfaces 312 , so that more light enters the first substrate 10 .

[0039] In one embodiment, the first light absorption structure 311 is a pyramid. The first light absorption structure 311 can be a pyramid such as a triangular pyramid, a quadrangular pyramid, a pentagonal pyramid, or a regular pyramid.

[0040] In one embodiment, the second light absorption structure 313 is a pyramid. The second light absorption structure 313 can be a pyramid such as a triangular pyramid, a quadrangular pyramid, a pentagonal pyramid, or a regular pyramid.

[0041] The pyramid includes a polygonal face, and the remaining faces are polyhedrons surrounded by triangles with a common vertex. It can receive incident light from different directions and also receive light after reflection or refraction, thereby reducing light loss and improving light utilization.

[0042] In one embodiment, the first light absorbing structure 311 is a regular tetrahedron, and the second light absorbing structure 313 is a regular triangular pyramid. The base of the regular tetrahedron is a square, and the side surfaces are 4 congruent isosceles triangles with a common vertex, that is, the multiple side surfaces 312 are congruent isosceles triangles. The second light absorbing structure 313 is a regular triangular pyramid, the base is a regular triangle, and the side surfaces are congruent isosceles triangles. When the incident light is irradiated on the side of the second light absorbing structure 313, the refracted light will enter the second light absorbing structure 313 and refract out through the side of another second light absorbing structure 313. At this time, the light path will change, reducing the number of times the incident light is reflected, so that as much light as possible slowly approaches the first substrate 10, so that more light enters the first substrate 10, effectively reducing light loss and improving the output power of the photovoltaic module 100.

[0043] In one embodiment, there is no limit to the number of the first light absorption structures 311 and the second light absorption structures 313. There is no limit to the number of the second light absorption structures 313 provided on each of the side surfaces 312, and they can be provided according to the relative sizes in the actual production process, and the edge of the second light absorption structure 313 cannot exceed the edge of the side surface 312 of the first light absorption structure 311.

[0044] See also Figure 8 In one embodiment, each of the side surfaces 312 is provided with three of the second light absorbing structures 313, one or two bottom surface edges of each of the second light absorbing structures 313 coincide with the edges of the side surfaces 312, and the bottom surface vertex of one of the second light absorbing structures 313 coincides with the common vertex of the plurality of side surfaces 312. The bottom surface vertex of one of the second light absorbing structures 313 coincides with the common vertex of the first light absorbing structures 311, and the two bottom surface edges coincide with the two edge lines of the side surfaces 312. One edge line of the bottom surface of the remaining two second light absorbing structures 313 coincides with one edge line of the side surfaces 312. When incident light enters the second light absorbing structure 313, refraction occurs. By setting the angle and edge line of the second light absorbing structure 313, as much incident light as possible can enter the first substrate 10.

[0045] See also Figure 6According to the theoretical knowledge of light refraction and reflection, the incident light a is irradiated on the second light absorbing structure 313, and the light rays b, c, d, and f enter the first substrate 10 after refraction and reflection by the second light absorbing structure 313, thereby increasing the amount of incident light entering the first substrate 10. By providing the protruding structure 310 on the first surface 110, the amount of incident light on the solar cell panel 20 can be significantly increased, so that more light can enter the photovoltaic module 100 for power generation, thereby increasing the output power of the photovoltaic module.

[0046] In one embodiment, the solar cell panel 20 includes a plurality of battery chips 210 , and the plurality of battery chips 210 are connected in series.

[0047] The plurality of battery chips 210 may be silicon battery cells, hybrid battery cells, dye-sensitive battery cells or other types of battery cells. The solar panel 20 is formed by arranging the plurality of battery chips 210, and the plurality of battery chips 210 are connected in series in sequence through tinned copper strips, and the battery chips 210 at the head and tail are led out with tinned copper strip leads.

[0048] In one embodiment, the photovoltaic module 100 further includes a second substrate 40, a first adhesive layer 50, and a second adhesive layer 60. The second substrate 40 is overlapped with the surface of the solar cell panel 20 away from the first substrate 10. The first adhesive layer 50 is disposed between the first substrate 10 and the solar cell panel 20 to bond the first substrate 10 to the solar cell panel 20. The second adhesive layer 60 is disposed between the solar cell panel 20 and the second substrate 40 to bond the solar cell panel 20 to the second substrate 40.

[0049] The side of the second substrate 40 away from the second adhesive layer 60 is connected to the junction box, and the tinned copper tape lead is connected to the junction box. When sunlight enters the first substrate 10 from the protruding structure 310, it is then incident on the solar cell panel 20, and the solar cell panel 20 performs photoelectric conversion, so that more sunlight incident on the solar cell panel 20 is used for power generation, thereby improving the utilization rate of sunlight and effectively improving the power of the photovoltaic module 100.

[0050] In one embodiment, the first adhesive layer 50 and the second adhesive layer 60 are polyethylene-polyvinyl acetate copolymer films. The first adhesive layer 50 and the second adhesive layer 60 are EVA films, which have advantages in adhesion, durability, optical properties, etc., and can be applied to various interfaces, including glass, metal, and plastic.

[0051] In one embodiment, the distance between two adjacent protrusion structures 310 is zero.

[0052] A plurality of the protruding structures 310 are arranged on the first surface 110 to form an array structure. The smaller the distance between two adjacent protruding structures 310, the more incident light is irradiated to the light absorbing array layer 30, thereby refracting or reflecting the incident light into the first substrate 10, and then into the solar cell panel 20. It is optimal to place two adjacent protruding structures 310 closely together, so that as much incident light as possible is absorbed by the plurality of protruding structures 310, thereby improving the utilization rate of sunlight and saving energy.

[0053] In one embodiment, the first substrate 10 , the first light absorption structure 311 , and the second light absorption structure 313 are all made of tempered glass.

[0054] The refractive index of tempered glass is in the range of 1.3 to 2.1. According to the theoretical knowledge of refraction and reflection of light, when light is refracted from a vacuum into tempered glass, more light can enter the first substrate 10, thereby increasing the amount of incident light entering the first substrate 10, increasing the amount of incident light entering the solar cell panel 20, effectively reducing light loss and improving the output power of the photovoltaic module 100.

[0055] Tempered glass is stronger than ordinary glass, and has better resistance to bending, wind pressure, cold and heat, and impact, and can be used in special environments. At the same time, when tempered glass is damaged by external forces, the fragments will become small blunt-angled particles similar to honeycombs, which are not easy to cause harm to the human body and are highly safe.

[0056] In one embodiment, the thickness of the first substrate 10 may be 2 mm to 3 mm.

[0057] In one embodiment, the height of the first light absorption structure 311 is 0.1 mm to 0.5 mm.

[0058] In one embodiment, the height of the second light absorption structure 313 is 0.025 mm to 0.125 mm.

[0059] In one embodiment, the distance between the second light absorbing structures 313 on two adjacent protruding structures 310 can be 0.04 mm to 0.2 mm, and the distance between the two adjacent protruding structures 310 can be as small as possible, so that the incident light can be received over the maximum area, the amount of incident light entering the first substrate 10 is increased, natural sunlight is fully utilized, and the utilization rate of sunlight is improved.

[0060] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A photovoltaic module (100), characterized in that: include: A first substrate (10) having a first surface (110) and a second surface (120) opposite to the first surface (110); A solar cell panel (20) is arranged overlapping the first substrate (10) and adhered to the second surface (120); A light absorption array layer (30) is disposed on the first surface (110), the light absorption array layer (30) comprising a plurality of convex structures (310) disposed at intervals, and a distance between two adjacent convex structures (310) is 0; The light absorption array layer (30) is used to refract or reflect incident light into the first substrate (10), and then into the solar cell panel (20); Wherein, each of the protruding structures (310) comprises: A first light absorption structure (311) is disposed on the first surface (110), the first light absorption structure (311) having a plurality of side surfaces (312), and each of the first light absorption structures (311) has a different size; A plurality of second light absorbing structures (313) are arranged on the side surface (312); each of the side surfaces (312) is provided with a plurality of the second light absorbing structures (313); the size of each of the second light absorbing structures (313) is different, and the size of the first light absorbing structure (311) is larger than the size of the second light absorbing structure (313).

2. The photovoltaic module (100) according to claim 1, characterized in that: The first substrate (10), the first light absorbing structure (311) and the second light absorbing structure (313) are all made of tempered glass.

3. The photovoltaic module (100) according to claim 1, characterized in that: The thickness of the first substrate (10) is 2 mm to 3 mm.

4. The photovoltaic module (100) according to claim 1, characterized in that: The first light absorption structure (311) is a pyramid.

5. The photovoltaic module (100) according to claim 1, characterized in that: The second light absorbing structure (313) is a pyramid.

6. The photovoltaic module according to claim 4, characterized in that: The height of the first light absorbing structure (311) is 0.1 mm to 0.5 mm.

7. The photovoltaic module according to claim 5, characterized in that: The height of the second light absorbing structure (313) is 0.025 mm to 0.125 mm.

8. The photovoltaic module (100) according to claim 1, characterized in that: The solar cell panel (20) comprises a plurality of battery chips (210), and the plurality of battery chips (210) are connected in series.

9. The photovoltaic module (100) according to claim 1, characterized in that: The photovoltaic module (100) further comprises: A second substrate (40) is arranged to overlap with a surface of the solar cell panel (20) away from the first substrate (10); A first bonding layer (50) is disposed between the first substrate (10) and the solar cell panel (20) and is used to bond the first substrate (10) and the solar cell panel (20); The second adhesive layer (60) is disposed between the solar cell panel (20) and the second substrate (40) and is used to bond the solar cell panel (20) and the second substrate (40).

10. The photovoltaic module (100) according to claim 9, characterized in that: The first adhesive layer (50) and the second adhesive layer (60) are polyethylene-polyvinyl acetate copolymer films.

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