Double-sided packaged low-glare photovoltaic module

Abstract

The utility model discloses a double-sided packaged low-glare photovoltaic module, which comprises a substrate (1), and a current-conducting plate (2) and anti-glare glass (13) are sequentially arranged on the front surface of the substrate (1); grooves (3) which are uniformly distributed are formed in the front surface of the current-conducting plate (2), crystalline silicon battery pieces (4) are arranged in the grooves (3), and the crystalline silicon battery pieces (4) are electrically connected through the current-conducting plate (2); the side edge of the groove (3) protrudes out of the front face of the crystalline silicon battery piece (4), in the side edge of the groove (3) of the protruding part, the front face of the left side edge and the front face of the right side edge are each provided with a first light guide inclined face (5) inclining upwards, and the inner groove face of the upper side edge is provided with a second light guide inclined face (14) facing the front face of the crystalline silicon battery piece (4). According to the utility model, the reflection is reduced by hiding the electric connection parts of the crystalline silicon cells, and the light in the gaps of the crystalline silicon cells is reflected and utilized by utilizing the light guide inclined planes, so that the practicability is good.

Description

A double-sided encapsulated low-glare photovoltaic module Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and in particular to a low-glare photovoltaic module with double-sided encapsulation. Background Technology

[0002] In specific areas with high requirements for light pollution control, such as highways, airports, and building curtain walls, anti-glare glass and anti-glare components are increasingly used to ensure the safety of personnel and the surrounding environment and reduce the harm caused by glare. Currently, anti-glare designs for photovoltaic modules on the market achieve their purpose by altering the path of incident light and reducing light reflectivity through glass treatment. For example, Chinese utility model patent CN216563153U discloses a high-power anti-glare photovoltaic module, specifically including a front glass, a front encapsulating film, a battery layer, a back encapsulating film, and a back glass. The battery layer consists of multiple battery cells connected by solder ribbons. In addition to the scattering structure of the front glass, sunlight not utilized by the battery cells is reflected through the reflective area on the back glass. However, the battery cells in this application have large gaps, and the solder ribbons used for connection also reflect light. The light reflected by these ribbons, along with the light reflected by the reflective area on the back glass, cannot be fully canceled out by the scattering structure, and some light still shines outward, resulting in a poor anti-glare effect. Summary of the Invention

[0003] The purpose of this invention is to provide a low-glare photovoltaic module with double-sided encapsulation. This invention reduces reflection by concealing the electrical connection components of the crystalline silicon cells, and simultaneously utilizes a light-guiding bevel to reflect and utilize the light from the gaps between the crystalline silicon cells, resulting in excellent practicality.

[0004] The technical solution of this utility model is as follows: A double-sided encapsulated low-glare photovoltaic module includes a substrate, on the front side of which a conductive plate and an anti-glare glass are sequentially arranged; the front side of the conductive plate is provided with uniformly distributed grooves, and crystalline silicon solar cells are arranged in the grooves, with each crystalline silicon solar cell electrically connected through the conductive plate; the side of the groove protrudes from the front side of the crystalline silicon solar cell, and in the side of the protruding part of the groove, the left and right sides each have an upwardly inclined first light guiding surface, the inner groove surface of the upper side has a second light guiding surface facing the front side of the crystalline silicon solar cell, and the inner groove surface of the lower side has a third light guiding surface parallel to the second light guiding surface.

[0005] In the aforementioned double-sided encapsulated low-glare photovoltaic module, the substrate is provided with multiple positioning holes, and the conductive plate is provided with positioning posts that are adapted to the positioning holes.

[0006] In the aforementioned double-sided encapsulated low-glare photovoltaic module, the positive groove surface of the groove is provided with conductive contacts for connecting the main grid lines of the crystalline silicon solar cells, and the conductive plate is provided with a circuit board that connects the conductive contacts in series.

[0007] In the aforementioned double-sided encapsulated low-glare photovoltaic module, the cavity enclosed by the anti-glare glass, the front of the crystalline silicon cell, and the groove side of the protruding portion is filled with potting compound.

[0008] In the aforementioned double-sided encapsulated low-glare photovoltaic module, the conductive plate has a potting port on its side that connects the inner cavity of the groove to the outside, and an opening is provided at the junction of the protruding sides of adjacent grooves.

[0009] In the aforementioned double-sided encapsulated low-glare photovoltaic module, the grooves are arranged in a linear array, and the openings are located at the junction of the sides of four adjacent grooves.

[0010] In the aforementioned double-sided encapsulated low-glare photovoltaic module, the angle between the first light-guiding inclined surface and the front surface of the crystalline silicon cell is less than 30°.

[0011] Compared with existing technologies, this invention uses a conductive plate as the base for packaging. First, a substrate is packaged on the back, and then crystalline silicon solar cells are placed in the grooves of the conductive plate. The crystalline silicon solar cells are electrically connected through the conductive plate, and anti-glare glass is packaged on top of the conductive plate to complete the assembly. Compared with the traditional method of connecting with solder ribbons and interconnecting strips, this invention hides the conductive components to avoid glare caused by light reflection. The crystalline silicon solar cells are embedded in the grooves, which improves the speed of installation. The side of the groove of the protruding part has a first light guiding slope, a second light guiding slope, and a third light guiding slope. The first light guiding slope guides the light incident from the front upward, reducing lateral and frontal reflections, thereby reducing glare. The third light guiding slope also reflects the incident light upward and guides it to the second light guiding slope. The second light guiding slope further guides the light to the crystalline silicon solar cells, further reducing glare and improving light utilization. Attached Figure Description

[0012] Figure 1 is a structural schematic diagram of this utility model;

[0013] Figure 2 is a schematic diagram of the front structure of the conductive plate of this utility model;

[0014] Figure 3 is a structural schematic diagram of the lower junction of the groove in this utility model;

[0015] Figure 4 is a structural schematic diagram of the junction position of the groove on the upper side of this utility model;

[0016] Figure 5 is a schematic diagram of the structure of the left and right sides of the groove of this utility model;

[0017] Figure 6 is a structural schematic diagram of the back of this utility model;

[0018] Figure 7 is a schematic diagram of the circuit board structure of the conductive plate of this utility model.

[0019] The labels in the attached diagram are as follows: 1. Substrate; 2. Conductive plate; 3. Groove; 4. Crystalline silicon solar cell; 5. First light guide slope; 7. Positioning hole; 8. Positioning post; 9. Conductive contact; 10. Circuit board; 11. Potting port; 12. Opening; 13. Anti-glare glass; 14. Second light guide slope; 15. Third light guide slope. Detailed Implementation

[0020] 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.

[0021] Example: A double-sided encapsulated low-glare photovoltaic module, as shown in Figure 1, includes an aluminum substrate 1 for support and heat dissipation. A conductive plate 2 and an anti-glare glass 13 are sequentially mounted on the front side of the substrate 1. The anti-glare glass is a glass body with an anti-glare coating. As shown in Figure 2, the conductive plate 2 has uniformly distributed grooves 3 on its front side. Crystalline silicon solar cells 4 are embedded in the grooves 3, and each crystalline silicon solar cell 4 is electrically connected via the conductive plate 2. As shown in Figures 3 and 4, the sides of the grooves 3 protrude from the front side of the crystalline silicon solar cells 4. On the front side of the protruding portion of the groove 3, both the left and right sides have an upward-sloping first light-guiding surface 5. The inner groove surface on the side is processed with a second light-guiding inclined surface 14 facing the front of the crystalline silicon solar cell 4, and the inner groove surface on the lower side is processed with a third light-guiding inclined surface 15 parallel to the second light-guiding inclined surface 14. A reflective film is processed on the first light-guiding inclined surface 5, the second light-guiding inclined surface 14, and the third light-guiding inclined surface 15 by vapor deposition to achieve a reflective light-guiding effect. Positioning holes 7 are opened at each of the four corners of the substrate 1. Positioning posts 8, which are adapted to the positioning holes 7, are integrally formed on the conductive plate 2. When encapsulating the back of the conductive plate, an adhesive film is placed on the back of the conductive plate, and then the substrate and the conductive plate are accurately aligned and bonded together by the cooperation of the positioning posts and positioning holes. The front groove surface of the groove 3... The conductive plate 2 has metal conductive contacts 9 for connecting the main grid lines of the crystalline silicon solar cell 4, as shown in Figure 7. The conductive plate 2 has a sandwich layer, within which a circuit board 10 is fixed, with each conductive contact 9 connected in series. Metal traces are etched on the circuit board to achieve electrical connection. The cavity enclosed by the anti-glare glass 13, the front of the crystalline silicon solar cell 4, and the side of the groove 3 of the protruding portion is filled with potting compound. The potting compound has good optical properties, electrical insulation properties, and weather resistance, and can cure at room temperature. It has good adhesion to various materials and excellent high and low temperature resistance and anti-aging properties, avoiding scattering and reflection caused by the cavity, while also being adaptable to photovoltaic modules. The outdoor use environment of the component; as shown in Figure 6, the conductive plate 2 has a potting port 11 on its side that connects the inner cavity of the groove 3 to the outside. An opening 12 is opened at the junction of the protruding side of the adjacent groove 3. After the anti-glare glass is positioned and assembled on the conductive plate, potting glue is injected from the potting port and further fills all the cavities through the opening. After sealing the potting port, it is left to cure to complete the encapsulation. The grooves 3 are arranged in a linear array. The opening 12 is set at the junction of the sides of four adjacent grooves 3 so that the potting glue can be filled more quickly. As shown in Figure 5, the angle between the first light guide slope 5 and the front of the crystalline silicon cell 4 is less than 30°.

[0022] Working principle: When the photovoltaic module is working, light first shines on the anti-glare glass 13. The anti-glare glass 13 can effectively reduce the reflection of external light, reduce light pollution to the surrounding environment, and ensure the safety of personnel and the environment. Subsequently, the light passes through the anti-glare glass 13 and enters the module. Some of the light directly shines on the crystalline silicon solar cell 4, is absorbed by the crystalline silicon solar cell 4 and converted into electrical energy. The light that shines on the gaps between the crystalline silicon solar cells 4 will encounter the first light guiding slope 5 and the third light guiding slope 15 on the side of the protruding groove 3. The first light guiding slope 5 guides the light incident from the front upward, reducing lateral and frontal reflections, thereby reducing glare. The third light guiding slope 15 also reflects the incident light upward and guides it to the second light guiding slope 14. The second light guiding slope 14 further guides the light to the crystalline silicon solar cell 4, further reducing glare and improving light utilization.

[0023] In terms of electrical connection, the main grid line of the crystalline silicon solar cell 4 is connected to the circuit board 10 in the conductive plate 2 through the conductive contact 9 on the groove surface of the groove 3. The circuit board 10 connects each crystalline silicon solar cell 4 electrically, realizing the transmission and collection of electrical energy.

[0024] In addition, the potting compound filling the cavity enclosed by the anti-glare glass 13 and the groove 3 on the side of the protruding part of the crystalline silicon cell 4 can not only avoid light scattering and reflection caused by the cavity, but also play a good role in electrical insulation, weather resistance and adhesion, ensuring that the module operates stably in complex outdoor environments.

[0025] Overall, the low-glare photovoltaic module with double-sided encapsulation of this utility model, through structural designs such as hiding conductive components, setting light-guiding slopes, and filling with potting compound, reduces glare generation while improving light utilization efficiency, achieving stable and efficient photoelectric conversion, and meeting the usage requirements of areas with high requirements for light pollution environments such as highways and building curtain walls.

[0026] The above embodiments merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. Furthermore, in these embodiments, "up," "down," "left," "right," "front," and "back" represent relative positions only, not absolute positions. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A low-glare photovoltaic module with dual-sided encapsulation, characterized by: The substrate (1) includes a conductive plate (2) and an anti-glare glass (13) arranged sequentially on the front side of the substrate (1); the conductive plate (2) has uniformly distributed grooves (3) on the front side, and crystalline silicon solar cells (4) are arranged in the grooves (3), and each crystalline silicon solar cell (4) is electrically connected through the conductive plate (2); the side of the groove (3) protrudes from the front side of the crystalline silicon solar cell (4), and the left and right sides of the protruding groove (3) have a first light guide slope (5) that is inclined upward on the front side, the inner groove surface of the upper side has a second light guide slope (14) that faces the front side of the crystalline silicon solar cell (4), and the inner groove surface of the lower side has a third light guide slope (15) that is parallel to the second light guide slope (14).

2. The low-glare photovoltaic module with double-sided encapsulation according to claim 1, characterized in that: The substrate (1) is provided with a plurality of positioning holes (7), and the conductive plate (2) is provided with positioning posts (8) that are adapted to the positioning holes (7).

3. The dual-sided encapsulated low-glare photovoltaic assembly of claim 1, wherein: The groove (3) has conductive contacts (9) on its positive groove surface for connecting the main grid lines of the crystalline silicon solar cell (4), and the conductive plate (2) has a circuit board (10) that connects each conductive contact (9) in series.

4. The dual-sided encapsulated low-glare photovoltaic assembly of claim 1, wherein: The cavity enclosed by the anti-glare glass (13) and the groove (3) of the protruding part of the crystalline silicon solar cell (4) is filled with potting compound.

5. The low-glare photovoltaic module with double-sided encapsulation according to claim 4, characterized in that: The conductive plate (2) has a glue-filling port (11) on its side that connects the inner cavity of the groove (3) and the outside. An opening (12) is provided at the junction of the protruding side of the adjacent groove (3).

6. The dual-sided encapsulated low-glare photovoltaic assembly of claim 5, wherein: The grooves (3) are arranged in a linear array, and the openings (12) are located at the junction of the sides of four adjacent grooves (3).

7. The low-glare photovoltaic module with double-sided encapsulation according to claim 1, characterized in that: The angle between the first light guide slope (5) and the front side of the crystalline silicon solar cell (4) is less than 30°.

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