Low-reflection laminated photovoltaic module

Abstract

The utility model discloses a low-reflection laminated photovoltaic module, which comprises a mounting frame (1), a glass base layer (2), a crystalline silicon battery piece (13) and a back plate (14) are sequentially arranged in the mounting frame (1) along the incident direction, a first antireflection film (3) is arranged on the incident surface of the glass base layer (2), and a second antireflection film (4) is arranged on the emergent surface of the glass base layer (2). The middle part of the incident surface of the glass base layer (2) is provided with a convex arc-shaped light condensation part (5), and the periphery of the light condensation part (5) is provided with a planar reflection utilization part (6); a convex edge (7) protruding out of the surface of the first antireflection film (3) is arranged on the mounting frame (1); according to the utility model, the incident plane is enlarged through the light condensing part, the light condensing effect is realized, the reflected light on the surface can be further utilized, and the light source acquisition efficiency and the utilization rate are high.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic field especially relates to a low reflection laminated photovoltaic module. BACKGROUND

[0002] The photovoltaic glass plays a vital role in the photovoltaic power generation system, mainly including protection, structural support and electrical insulation and the like, and in order to improve the power generation efficiency of the photovoltaic cell, the optical performance of the photovoltaic glass is also particularly key, for example, the Chinese utility model patent with the announcement number CN212335026U discloses a kind of multilayer film photovoltaic glass and photovoltaic module, specifically including first anti-reflection film, secondary anti-reflection film, reflective film and the like components, by the cooperation of multiple films to improve light transmittance and reduce light reflection, however, the incident area of this photovoltaic module is subject to glass area, and the light intensity obtained is limited, and it is difficult to ensure sufficient light source acquisition efficiency in weak light weather. SUMMARY

[0003] The utility model discloses a kind of low reflection laminated photovoltaic module, the utility model increases incident surface by light collecting part and forms light collecting effect, simultaneously, light source acquisition efficiency and utilization rate are high by further utilizing its surface reflected light.

[0004] The technical scheme of the utility model discloses a kind of low reflection laminated photovoltaic module, including installation frame, glass base layer, crystalline silicon cell and backboard are sequentially provided with in installation frame along incident direction, first anti-reflection film is provided on the incident surface of glass base layer, second anti-reflection film is provided on the emergent surface of glass base layer, the middle part of the incident surface of glass base layer has the light collecting part of convex arc shape, the periphery of light collecting part has the reflection utilization part of plane shape;The convex edge protruding from the surface of first anti-reflection film is provided on the installation frame, the inner side surface of convex edge is equipped with first reflection surface, the incident direction of first reflection surface is towards light collecting part, the emergent direction of first reflection surface is towards reflection utilization part.

[0005] In the above-mentioned low reflection laminated photovoltaic module, the second reflection surface is provided on the convex edge and located outside the first reflection surface, and the incident direction and the emergent direction of the second reflection surface are both towards the light collecting part.

[0006] In the above-mentioned low reflection laminated photovoltaic module, the inclination angle of the second reflection surface is less than the inclination angle of the first reflection surface.

[0007] In the above-mentioned low reflection laminated photovoltaic module, the light collecting part is circular, and the convex edge is rectangular, and the corner of the convex edge is provided as an inverted bevel structure towards the center of the light collecting part, and the two ends of the inverted bevel are respectively smoothly connected with the adjacent straight edges.

[0008] In the aforementioned low-reflection laminated photovoltaic module, the mounting frame includes two C-shaped side frames that are joined together, and the side frames are provided with fitting grooves for embedding a first anti-reflection film, a glass substrate, a second anti-reflection film, a crystalline silicon cell, and a backsheet.

[0009] In the aforementioned low-reflection laminated photovoltaic module, the side frame has an L-shaped cross-section, with the recessed side forming the fitting groove; the convex edge is disposed on the upper part of the side frame to close the upper side of the fitting groove.

[0010] In the aforementioned low-reflection laminated photovoltaic module, the end of the side frame is provided with a side plate, and the corresponding side plates at the ends of the two side frames are connected by bolts.

[0011] Compared with the prior art, in this invention, light passes sequentially through the first antireflective film, the glass substrate, and the second antireflective film before entering the crystalline silicon solar cell. Both the first and second antireflective films are used to improve light transmittance and reduce reflectivity. The light-concentrating part can increase its area to obtain more light, improving the light source acquisition efficiency. At the same time, its convex arc shape allows the light to converge, thus significantly increasing the light intensity per unit area of ​​the crystalline silicon solar cell, which is beneficial to its photoelectric conversion. The light reflected by the first antireflective film on the surface of the light-concentrating part enters the first reflective surface, and the first emitting surface reflects the reflected light again to the reflection utilization part, thereby entering the glass substrate and being utilized by the crystalline silicon solar cell, effectively improving the light source utilization rate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of this utility model without the mounting frame;

[0014] Figure 3 This is a schematic diagram of the side structure of this utility model;

[0015] Figure 4 This is a structural schematic diagram of the back panel side of this utility model.

[0016] The labels in the attached diagram are as follows: 1. Mounting frame; 2. Glass substrate; 3. First antireflective film; 4. Second antireflective film; 5. Concentrating part; 6. Reflection utilization part; 7. Protruding edge; 8. First reflective surface; 9. Second reflective surface; 10. Side frame; 11. Fitting groove; 12. Side plate; 13. Crystalline silicon solar cell; 14. Back plate. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0018] Example: A low-reflection laminated photovoltaic module, as shown in the attached figure. Figure 1and attached Figure 2 As shown in the attached Figure 3 , the mounting frame 1 is integrally formed with a convex edge 7 protruding from the surface of the first anti-reflection film 3, the inner surface of the convex edge 7 is bonded with a first reflective surface 8, the first reflective surface is an aluminum reflective film, which can efficiently reflect visible light and near-infrared light wavebands, the incident direction of the first reflective surface 8 is towards the light collecting part 5, and the outgoing direction of the first reflective surface 8 is towards the reflection utilization part 6; the convex edge 7 is bonded with a second reflective surface 9 located outside the first reflective surface 8, the second reflective surface is an aluminum reflective film, the incident direction and the outgoing direction of the second reflective surface 9 are both towards the light collecting part 5, which reflects the reflected light of the first anti-reflection film outside the light collecting part, and the reflected light continues to be condensed, expanding the reflective surface; the inclination angle of the second reflective surface 9 is smaller than that of the first reflective surface 8, the second reflective surface can capture more reflected light, and cooperates with the first reflective surface to fully utilize the light; the light collecting part 5 is circular, and the convex edge 7 is rectangular, the corners of the convex edge 7 are provided with inverted bevel structures towards the center of the light collecting part 5, the two ends of the inverted bevel are respectively smoothly connected with the adjacent straight edges, ensuring that the light can be guided to the light collecting part.

[0019] As shown in the attached Figure 4 , the mounting frame 1 includes two C-shaped side frames 10 that are split, the side frame 10 is processed with an embedded groove 11 for embedding the first anti-reflection film 3, the glass base layer 2, the second anti-reflection film 4, the crystalline silicon cell piece 13 and the back plate 14; the cross section of the side frame 10 is L-shaped, and the inner concave side forms the embedded groove 11, the convex edge 7 is arranged on the upper part of the side frame 10 to close the upper side of the embedded groove 11, ensuring that the first reflective surface can tightly adhere to the first anti-reflection film for sufficient light reflection; the end of the side frame 10 is integrally formed with a side plate 12, and the two side plates 12 corresponding to the ends of the two side frames 10 are connected by bolts, the side frame can be detachably connected, which is beneficial to cleaning and maintaining the internal components.

[0020] Working principle: the light rays in turn through the first anti-reflective film 3, glass base layer 2 and the second anti-reflective film 4 into the crystalline silicon cell 13, the first anti-reflective film 3 and the second anti-reflective film 4 are used to improve the light transmittance and reduce the reflectivity, the light collecting part 5 can increase the area to obtain more light, improve the light source acquisition efficiency, and the convex arc-shaped appearance makes the light converge and the light intensity of the crystalline silicon cell 13 per unit area increases significantly, which is beneficial to photoelectric conversion, the light reflected by the first anti-reflective film 3 on the surface of the light collecting part 5 enters the first reflecting surface 8, and the first reflecting surface 8 reflects the reflected light to the reflection utilization part 6 again, so that the light is shot into the glass base layer 2 and utilized by the crystalline silicon cell 13, and the light source utilization rate is effectively improved.

[0021] In actual work process, when the light irradiates on the assembly, the light collecting part 5 will converge the originally dispersed light on the crystalline silicon cell 13 due to the convex arc-shaped structure according to the refraction principle of light, so that the crystalline silicon cell 13 can receive more light energy per unit area, the collection efficiency of light energy is improved, and the power generation efficiency is improved.

[0022] And for the light reflected from the first anti-reflective film 3 on the surface of the light collecting part 5, this part of light may be lost, but in the assembly, they will be captured by the first reflecting surface 8, the first reflecting surface 8 is an aluminum reflecting film, which has high reflection ability for visible light and near-infrared light wave band, and it will reflect the reflected light towards the reflection utilization part 6, the reflection utilization part 6 is a planar structure, after the reflected light reaches the reflection utilization part 6, it will enter the glass base layer 2 again, and finally be absorbed and utilized by the crystalline silicon cell 13, realizing the secondary utilization of the reflected light, and further improving the light source utilization rate.

[0023] The above embodiments only express the implementation of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent, and in the embodiment, up, down, left, right, front and back only represent the relative position and not the absolute position. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, some modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A low-reflection laminated photovoltaic module, comprising a mounting frame (1), wherein a glass substrate (2), crystalline silicon solar cells (13), and a backsheet (14) are sequentially arranged within the mounting frame (1) along the incident direction; a first anti-reflection film (3) is provided on the incident surface of the glass substrate (2), and a second anti-reflection film (4) is provided on the exiting surface of the glass substrate (2), characterized in that: The incident surface of the glass substrate (2) has a convex arc-shaped light-concentrating part (5) in the middle, and a planar reflective utilization part (6) around the light-concentrating part (5); the mounting frame (1) is provided with a protruding edge (7) protruding from the surface of the first anti-reflection film (3), and a first reflective surface (8) is provided on the inner surface of the protruding edge (7). The incident direction of the first reflective surface (8) is towards the light-concentrating part (5), and the exit direction of the first reflective surface (8) is towards the reflective utilization part (6).

2. The low-reflection laminated photovoltaic module according to claim 1, characterized in that: The convex edge (7) is provided with a second reflective surface (9) located outside the first reflective surface (8), and the incident direction and the exit direction of the second reflective surface (9) are both towards the light-concentrating part (5).

3. The low-reflection laminated photovoltaic module according to claim 2, characterized in that: The tilt angle of the second reflective surface (9) is smaller than the tilt angle of the first reflective surface (8).

4. The low-reflection laminated photovoltaic module according to claim 1, characterized in that: The light-concentrating part (5) is circular, and the convex edge (7) is rectangular. The corners of the convex edge (7) are set as inverted bevels facing the center of the light-concentrating part (5), and the two ends of the inverted bevels are smoothly connected to the adjacent straight edges.

5. The low-reflection laminated photovoltaic module according to claim 1, characterized in that: The mounting frame (1) includes two C-shaped side frames (10) that are joined together. The side frames (10) are provided with fitting grooves (11) for embedding the first anti-reflective film (3), the glass substrate (2), the second anti-reflective film (4), the crystalline silicon solar cell (13) and the back plate (14).

6. The low-reflection laminated photovoltaic module according to claim 5, characterized in that: The side frame (10) has an L-shaped cross section, and the inner concave side forms the fitting groove (11); the convex edge (7) is disposed on the upper part of the side frame (10) to close the upper side of the fitting groove (11).

7. The low-reflection laminated photovoltaic module according to claim 5, characterized in that: The end of the side frame (10) is provided with a side plate (12), and the two side plates (12) corresponding to the ends of the two side frames (10) are connected by bolts.

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