Photovoltaic module

Abstract

The utility model provides a photovoltaic assembly, relates to the field of photovoltaic technology, and aims to solve the technical problem of poor anti-dazzle effect of the photovoltaic assembly. The photovoltaic module comprises a light guide plate, a laminating piece and a frame wrapping the peripheral edge of the laminating piece, the light guide plate is connected to the frame and located above the light receiving face of the laminating piece, and a preset distance is formed between the light guide plate and the light receiving face; the light guide plate is provided with a plurality of through holes which are periodically arranged, and the through holes are used for guiding all incident light to the light receiving surface of the laminated piece. According to the multi-through-hole structure with the periodically arranged photovoltaic assembly, part of light irradiated to the upper portion of the laminated piece directly penetrates through the through holes, part of the light is reflected by the hole walls of the through holes and then reaches the light receiving face of the laminated piece, the anti-dazzle purpose is achieved, the preset distance is formed between the light guide plate and the light receiving face, and the anti-dazzle effect is achieved. And a certain buffering effect can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, and particularly relates to a photovoltaic module. Background Art

[0002] The statements in this part only provide the background art related to the utility model, and do not necessarily constitute the prior art.

[0003] During the use of a photovoltaic module, the light-receiving surface of the laminate is generally formed by tempered glass. Since the surface of the tempered glass is prone to form specular reflection under sunlight, glare is caused, which not only affects the absorption of light energy but also causes serious light pollution.

[0004] In the related art, the anti-glare treatment of photovoltaic modules can achieve certain effects, but the effects are not good and problems such as a reduction in the conversion efficiency of photovoltaic modules are likely to occur. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a photovoltaic module to solve the technical problem of poor anti-glare effect of photovoltaic modules.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] In a first aspect, the utility model provides a photovoltaic module, including a light guide plate, a laminate, and a frame covering the circumferential edge portion of the laminate. The light guide plate is connected to the frame and is located above the light-receiving surface of the laminate, and there is a preset distance between the light guide plate and the light-receiving surface;

[0008] The light guide plate has a plurality of through holes arranged periodically, and the through holes are used to completely guide the incident light to the light-receiving surface of the laminate.

[0009] According to at least one embodiment of the utility model, the wall thickness of the through hole is less than or equal to 0.15 mm, and the depth of the through hole is greater than or equal to 0.5 mm.

[0010] According to at least one embodiment of the utility model, the depth of the through hole ranges from 0.5 mm to 10 mm.

[0011] According to at least one embodiment of the utility model, the wall thickness of the through hole ranges from 0.05 mm to 0.15 mm.

[0012] According to at least one embodiment of the utility model, the cross-sectional dimension of the through hole is less than or equal to 8 mm.

[0013] According to at least one embodiment of the utility model, the cross-sectional dimension of the through hole ranges from 3 mm to 8 mm.

[0014] According to at least one embodiment of the present invention, the preset spacing has a value range of 2 mm to 15 mm.

[0015] According to at least one embodiment of the present invention, the light guide plate and the frame are integrally formed; or,

[0016] The light guide plate is fixedly or detachably connected to the frame.

[0017] According to at least one embodiment of the present utility model, the frame includes a first frame segment opposite to a side surface of the laminate;

[0018] When the light guide plate is fixedly or detachably connected to the frame, the photovoltaic assembly further comprises a connector provided on the light guide plate, and the connector is fixedly or detachably connected to a side of the first frame segment away from the laminate.

[0019] According to at least one embodiment of the present invention, the material of the light guide plate includes one of glass, resin, aluminum alloy or stainless steel.

[0020] Among the one or more technical solutions provided in the exemplary embodiments of the present utility model, at least one of the following beneficial effects can be achieved.

[0021] The photovoltaic module of the exemplary embodiment of the utility model is provided with a light guide plate having a plurality of through holes arranged periodically above the light receiving surface of the laminate, and a preset spacing is provided between the light guide plate and the laminate, wherein the light guide plate is connected to the frame. The periodically arranged multi-through hole structure enables the light irradiated to the top of the laminate to directly pass through the through holes or be reflected by the hole wall and reach the light receiving surface of the laminate without being reflected, thereby achieving the purpose of anti-glare and not easily reducing the transmission of light, thereby affecting the photoelectric conversion efficiency of the photovoltaic module.

[0022] Furthermore, there is a preset distance between the light guide plate and the light receiving surface, and when hard objects such as hail hit the laminate, the light guide plate can also play a certain buffering effect. The light guide plate is not arranged on the light receiving surface, and it can also prevent rainwater and dust from accumulating on the light receiving surface to affect the photoelectric conversion efficiency of the photovoltaic module.

[0023] Furthermore, the pattern of the hollow structure formed by the periodically arranged through holes of the light guide plate also enhances the aesthetic feeling of the combination of the photovoltaic module and the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings illustrate exemplary embodiments of the present invention and are used to explain the principles of the present invention together with the description thereof, wherein these drawings are included to provide a further understanding of the present invention, and the accompanying drawings are included in and constitute a part of this specification;

[0025] Figure 1 Is an isometric structural schematic diagram of a light guide plate according to an embodiment of the present invention;

[0026] Figure 2 Is a side view structural schematic diagram of a photovoltaic module according to an embodiment of the present invention;

[0027] Figure 3 Is a side view structural schematic diagram of a photovoltaic module according to another embodiment of the present invention;

[0028] Figure 4 Is a side view structural schematic diagram of a photovoltaic module according to yet another embodiment of the present invention.

[0029] Reference numerals: 10, light guide plate; 11, through hole; 12, connecting member; 20, frame; 21, first frame segment; 22, second frame segment; 23, third frame segment. Detailed embodiments

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] In related technologies, a photovoltaic module generally forms patterns or embossments on the tempered glass (cover glass) of a laminate to form an anti-glare glass. This kind of anti-glare glass has a certain anti-glare effect, but only reduces or alleviates the severity of glare. Moreover, the patterns or embossments of the anti-glare glass make it difficult to clean the dust deposited on the light-receiving surface. As time goes by, the surface of the anti-glare glass will be corroded, thereby reducing the photoelectric conversion efficiency of the photovoltaic module; at the same time, the uneven surface of the anti-glare glass can withstand different stresses, increasing the probability of self-explosion of the anti-glare glass, and it is more likely to burst after being hit.

[0032] In view of the above problems, the photovoltaic module provided by the exemplary embodiment of the present invention arranges a light guide plate with multi-through holes having a light guiding function on the frame and above the light-receiving surface of the laminate, and the two maintain a preset distance, which not only plays an anti-glare role but also does not reduce the photoelectric conversion efficiency of the photovoltaic module.

[0033] Figure 1 Is an isometric structural schematic diagram of a light guide plate according to an embodiment of the present invention; Figure 2 Is a side view structural schematic diagram of a photovoltaic module according to an embodiment of the present invention. As Figure 1 And Figure 2As shown, in the photovoltaic module of the exemplary embodiment of the utility model, the laminate is sequentially stacked with cover glass, adhesive film, battery cell, another adhesive film and back plate from the front to the back. The frame 20 includes a first frame segment 21, a second frame segment 22 and a third frame segment 23, wherein the third frame segment 23 is connected to the top of the first frame segment 21, the second frame segment 22 is connected to the position near the top of the first frame segment 21, and the second frame segment 22 and the third frame segment 23 are located on the same side of the first frame segment 21, that is, the second frame segment 22, the third frame segment 23 and a part of the first frame segment 21 form a "匚"-shaped structure, and the "匚"-shaped structure is coated on the circumferential edge of the laminate. Specifically, the third frame segment 23 (also called the A side) is affixed to the front edge of the laminate, the second frame segment 22 (also called the C side) is affixed to the back edge of the laminate, and the first frame segment 21 (also called the B side) located between the A side and the C side is affixed to the side of the laminate, thereby playing a role in supporting and protecting the laminate.

[0034] In some embodiments, Figure 1 As shown, the light guide plate 10 is a porous plate with periodically arranged through holes 11, such as a honeycomb structure, and the cross-section of the through holes 11 can be in the shape of a regular hexagon, square, regular octagon, regular dodecagon, circle, etc. Exemplarily, the axial direction of the through holes 11 is perpendicular to the light-receiving surface of the laminate.

[0035] Exemplarily, the wall thickness of the through hole 11 may be in a range of less than or equal to 0.15 mm, and may be 0.05 mm to 0.15 mm, such as 0.07 mm, 0.09 mm, 0.11 mm, 0.13 mm, etc. The thickness h of the light guide plate 10, that is, the hole depth of the through hole 11, may be in a range of greater than or equal to 0.5 mm, and may be 0.5 mm to 10 mm, such as 1 mm, 3 mm, 5 mm, 7 mm, 9 mm, etc. The cross-sectional size of the through hole 11 may be less than or equal to 8 mm, and may be 3 mm to 8 mm, such as 4 mm, 5 mm, 6 mm, 7 mm, etc.

[0036] When the hole depth of the through hole 11 is less than 0.5 mm, the light incident on the through hole 11 cannot achieve the effect of total reflection on the light-receiving surface of the laminate; when the hole depth of the through hole 11 is greater than 10 mm, the light incident on the through hole 11 is reflected too many times on the hole wall, resulting in a large loss of light intensity, which will reduce the photoelectric conversion efficiency of the photovoltaic module.

[0037] When the cross-section of the through hole 11 is circular, the size of the cross-section refers to the aperture of the through hole 11; when the cross-section of the through hole 11 is a regular polygon, the size of the cross-section refers to the diameter of the circumscribed circle of the regular polygon.

[0038] Within the range of the size, wall thickness, and hole depth of the above through-hole 11, it can not only ensure that all the incident light can be introduced onto the light-receiving surface of the laminate after passing through the through-hole 11, but also ensure as little light intensity loss as possible.

[0039] Exemplarily, there is a preset distance L between the light guide plate 10 and the light-receiving surface, where the value range of L is 2 mm to 15 mm, such as 3 mm, 4 mm, 6 mm, 7 mm, 9 mm, 10 mm, 11 mm, 13 mm, etc.

[0040] When the thickness of the third border segment 23 is 2 mm to 5 mm, the bottom surface of the light guide plate 10 can be attached to the top surface of the third border segment 23, or can be higher than the top surface of the third border segment 23, for example, 2 mm to 10 mm higher than the top surface of the third border segment 23. In this embodiment, the light guide plate 10 can be arranged at a certain height difference from the top surface of the third border segment 23 through the connecting member 12. At this time, the connecting member 12 can be integrally formed with the third border segment 23, so that there is enough distance between the light guide plate 10 and the light-receiving surface of the laminate to better protect and buffer the impact on the laminate, especially the cover glass. At the same time, having enough distance between the light guide plate 10 and the light-receiving surface can also wash away the dust, sludge and other obstacles deposited on the light-receiving surface when it rains.

[0041] In some embodiments, when there is no height difference between the light guide plate 10 and the top surface of the third border segment 23, the light guide plate 10 can be integrally formed with the third border segment 23, as Figure 2 shown. For example, the light guide plate 10 can be integrally formed with the third border segments 23 of two long borders or two short borders in the frame 20 of the photovoltaic module. Utilizing the bendable characteristics of the light guide plate 10 or the laminate, the laminate is snapped into the cavity of the "C"-shaped structure, and then the remaining short borders or long borders are installed. Finally, the junction box of the photovoltaic module is installed to fabricate an anti-glare photovoltaic module. It should be noted that the laminate is rectangular, and the frame 20 of the laminate includes two long borders and two short borders.

[0042] Exemplarily, the material of the light guide plate 10 can include one of glass, resin, aluminum alloy, or stainless steel.

[0043] In some embodiments, the light guide plate 10 is fixedly or detachably connected to the frame 20.

[0044] Figure 3 is a schematic side view structure diagram of a photovoltaic module according to another embodiment of the present invention. As Figure 3As shown in the figure, the photovoltaic module of the exemplary embodiment of the present utility model further includes a connecting member 12 provided on the light guide plate 10. The connecting member 12 is fixedly connected to the side of the first frame segment 21 facing away from the laminate. The connecting member 12 can be a plate-like structure. One end of it is connected to one side surface of the light guide plate 10 and is perpendicular to the light guide plate 10. Most of the structure of the connecting member 12 is attached to the side surface of the first frame segment 21 facing away from the laminate. The connecting member 12 and the outer side surface of the first frame segment 21 are fixedly connected by an adhesive method. The height of the connecting member 12 is substantially the same as the height of the first frame segment 21.

[0045] Figure 4 is a schematic side view structure diagram of a photovoltaic module according to another embodiment of the present utility model. As Figure 4 shown, in the photovoltaic module of the exemplary embodiment of the present utility model, one end of the connecting member 12 is connected to one side surface of the light guide plate 10 and is perpendicular to the light guide plate 10. Most of the structure of the connecting member 12 is attached to the side surface of the first frame segment 21 facing away from the laminate. The connecting member 12 and the first frame segment 21 are detachably connected by a bolt and nut method. The height of the connecting member 12 is substantially the same as the height of the first frame segment 21. This embodiment can replace the light guide plate 10 more conveniently. In addition, since the light guide plate 10 and the frame 20 can be fixed by bolts and nuts after the frame 20 and the laminate are encapsulated, the assembly is more convenient and the manufacturing process of the photovoltaic module is also simplified.

[0046] It should be noted that Figure 3 and Figure 4 show a connecting member 12 of the light guide plate 10. The photovoltaic module can also be provided with multiple connecting members 12 to fixedly or detachably connect two or more side surfaces of the same light guide plate 10 to the corresponding first frame segments 21 of the frame 20 through the connecting members 12.

[0047] As can be seen from the above, by using a light guide plate with a specific porous structure and arranging the light guide plate above the laminate of the photovoltaic module, the glare caused by the specularly reflected light of the cover glass on the laminate can be eliminated, and at the same time, the photoelectric conversion efficiency of the photovoltaic module is not affected.

[0048] Those skilled in the art should understand that the above embodiments are only for clearly explaining the present utility model and are not intended to limit the scope of the present utility model. For those skilled in the art, other changes or modifications can be made based on the above disclosure, and these changes or modifications are still within the scope of the present utility model.

Claims

1. A photovoltaic module, characterized in that, It comprises a light guide plate, a laminate and a frame covering the circumferential edge of the laminate, wherein the light guide plate is connected to the frame and is located above the light receiving surface of the laminate, and there is a preset distance between the light guide plate and the light receiving surface; The light guide plate has a plurality of periodically arranged through holes, and the through holes are used to guide all incident light rays to the light receiving surface of the laminate.

2. The photovoltaic module according to claim 1, wherein, The wall thickness of the through hole is less than or equal to 0.15 mm, and the depth of the through hole is greater than or equal to 0.5 mm.

3. The photovoltaic module according to claim 2, wherein, The depth of the through hole ranges from 0.5 mm to 10 mm.

4. The photovoltaic module according to claim 2 or 3, characterized in that, The wall thickness of the through hole ranges from 0.05 mm to 0.15 mm.

5. The photovoltaic module according to claim 2 or 3, characterized in that, The cross-sectional dimension of the through hole is less than or equal to 8 mm.

6. The photovoltaic module according to claim 5, wherein, The cross-sectional dimension of the through hole ranges from 3 mm to 8 mm.

7. The photovoltaic module according to claim 1, wherein, The preset spacing has a value range of 2 mm to 15 mm.

8. The photovoltaic module according to claim 1, wherein The light guide plate and the frame are integrally formed; or, The light guide plate is fixedly or detachably connected to the frame.

9. The photovoltaic module according to claim 8, wherein The frame includes a first frame segment opposite to a side of the laminate; When the light guide plate is fixedly or detachably connected to the frame, the photovoltaic assembly further comprises a connector provided on the light guide plate, and the connector is fixedly or detachably connected to a side of the first frame segment away from the laminate.

10. The photovoltaic module according to claim 1, characterized in that, The material of the light guide plate includes glass, resin, aluminum alloy or stainless steel.

Images