Bifacial photovoltaic modules with high-strength glazed ceramic glass

Abstract

The invention discloses a double-sided photovoltaic module with high-strength glazed ceramic glass, which is installed and fixed by a fixing member, and includes: a front photovoltaic glass; a back photovoltaic glass, which is arranged opposite to the front photovoltaic glass and forms a double-layer structure; a plurality of cells, which are arranged in an array between the front photovoltaic glass and the back photovoltaic glass interlayer, and there is a gap between adjacent cells; a glaze layer, which is located at a non-cell part of the back photovoltaic glass; a glaze-free area is formed at the position where the side of the back photovoltaic glass is connected to the fixing member, and the height difference between the glaze-free area and the glaze layer is the thickness of the glaze layer. While making full use of the interstitial light, it not only improves the overall mechanical properties of the double-sided photovoltaic module, but also can quickly find the position where the fixing member needs to be installed, effectively improving the installation efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of double-sided photovoltaic modules, and in particular relates to a double-sided photovoltaic module with high-strength glazed ceramic glass. Background Art

[0002] With the development of the photovoltaic industry, the excellent performance of bifacial photovoltaic modules has gradually replaced traditional backplane modules. The excellent water vapor penetration resistance and anti-hidden cracking performance make double-glass the new favorite in the photovoltaic market. Glazed ceramic glass has become the preferred material for backplanes due to its excellent gain effect on module power.

[0003] The existing bifacial photovoltaic module installation methods are generally frameless installation with clamps and frame installation, such as Figure 3 As shown, the installation positions of the clamps and frames correspond to the glazed areas of the back photovoltaic glass ceramics. Since the back photovoltaic glass ceramics are tempered only after being glazed, the glaze layer will affect the tempering temperature of the back photovoltaic glass and reduce the local strength of the back photovoltaic glass. As a result, the load capacity of the component clamps or frames is reduced when subjected to force, affecting the overall mechanical strength of the photovoltaic component.

[0004] Furthermore, when installing the fixture of the existing bifacial photovoltaic module, the installation size error will be caused during the installation. Since the specific location of the fixture installation cannot be quickly determined, additional positioning time is required during the installation, which reduces the installation efficiency. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0006] To this end, the present invention proposes a double-sided photovoltaic module with high-strength glazed ceramic glass, which has the advantages of fast installation, high overall mechanical strength, and high gap light utilization.

[0007] According to the double-sided photovoltaic module with high-strength glazed ceramic glass of the embodiment of the present invention, the double-sided photovoltaic module is installed and fixed by a fixing member, and the double-sided photovoltaic module includes: a front photovoltaic glass; a back photovoltaic glass, the back photovoltaic glass is arranged opposite to the front photovoltaic glass and forms a double-layer structure; a plurality of battery cells, the plurality of battery cells are distributed in an array between the front photovoltaic glass and the back photovoltaic glass interlayer, and there are gaps between adjacent battery cells; a glaze layer, the glaze layer is located at the non-battery cell part of the back photovoltaic glass; the side of the back photovoltaic glass forms a glaze-free area at the position corresponding to the connection of the fixing member, and the height difference between the unglazed area and the glaze layer is the thickness of the glaze layer.

[0008] The double-sided photovoltaic module with high-strength glazed ceramic glass according to an embodiment of the present invention, by not coating the glaze layer at the position where the back photovoltaic glass is correspondingly connected to the fixing member, not only makes the side of the back photovoltaic glass corresponding to the connection with the fixing member have higher strength, improves the load capacity, and further improves the overall mechanical performance of the double-sided photovoltaic module, but also the unglazed area is a blank space reserved according to the shape and size of the fixing member. While the double-sided photovoltaic module can make full use of the interstitial light, when installing the fixing member, the position where the fixing member needs to be installed can be quickly found. This not only saves the positioning time during installation, but also avoids installation errors, quickly installs the fixing member on the back photovoltaic glass, saves installation time, and effectively improves the installation efficiency. This double-sided photovoltaic module has the advantages of fast installation, high overall mechanical strength, and high utilization rate of interstitial light.

[0009] According to an embodiment of the present invention, one side of the unglazed area close to the battery cell forms an abutting surface with the glaze layer, and the fixing member abuts against the abutting surface.

[0010] According to an embodiment of the present invention, the glaze layer on the edge of the back photovoltaic glass forms any one of the shapes of "匚", "井" or "王".

[0011] According to an embodiment of the present invention, the width of the glaze layer covering the battery cell is less than 4 mm.

[0012] According to an embodiment of the present invention, the distance between the glaze layer and the fixing member is greater than 0.5 mm.

[0013] According to an embodiment of the present invention, the fixing member is a clamp or a frame.

[0014] According to an embodiment of the present invention, when the fixing member is a clamp, the position where the back photovoltaic glass is connected to the clamp forms a plurality of the unglazed areas. The unglazed area also includes two sides. The two sides of the unglazed area respectively form two limiting surfaces with the glaze layer, and three sides of the clamp respectively abut against the limiting surfaces and the abutting surface.

[0015] According to an embodiment of the present invention, the length of the unglazed area is greater than the length of the clamp, and the width of the unglazed area is greater than the width of the clamp.

[0016] According to an embodiment of the present invention, the difference between the length of the unglazed area and the length of the clamp is ≥1 mm, and the difference between the width of the unglazed area and the width of the clamp is ≥1 mm.

[0017] According to an embodiment of the present invention, when the fixing member is a frame, the width of the unglazed area ≥ the distance at which the frame is inserted into the double-sided photovoltaic module.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a schematic structural diagram of a double-sided photovoltaic module with high-strength glazed ceramic glass according to an embodiment of the present invention;

[0021] Figure 2 is an enlarged view of region A of a double-sided photovoltaic module with high-strength glazed ceramic glass according to an embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the layout of the glaze layer of the back photovoltaic glass in the prior art.

[0023] Reference numerals:

[0024] A bifacial photovoltaic module 100 having high-strength glazed ceramic glass;

[0025] Back photovoltaic glass 10;

[0026] Battery cell 20;

[0027] Glaze layer 30;

[0028] Unglazed area 40. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The bifacial photovoltaic module 100 with high-strength glazed ceramic glass according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] like Figure 1 to Figure 2 As shown, according to an embodiment of the present invention, a double-sided photovoltaic module 100 with high-strength glazed ceramic glass is installed and fixed by fixing parts. The double-sided photovoltaic module includes: front photovoltaic glass, back photovoltaic glass 10, multiple battery cells 20 and a glaze layer 30.

[0034] Specifically, according to the double-sided photovoltaic module 100 with high-strength glazed ceramic glass of the embodiment of the present invention, the back photovoltaic glass 10 and the front photovoltaic glass are arranged opposite to each other and form a double-layer structure. A plurality of cells 20 are arranged in an array between the front photovoltaic glass and the back photovoltaic glass 10, and there is a gap between adjacent cells 20. The glaze layer 30 is located at the non-cell 20 part of the back photovoltaic glass 10, and the side of the back photovoltaic glass 10 is connected to the position corresponding to the fixing part to form a non-glazed area 40, and the height difference between the non-glazed area 40 and the glaze layer 30 is the thickness of the glaze layer 30.

[0035] In other words, according to the double-sided photovoltaic module 100 with high-strength glazed ceramic glass according to the embodiment of the present invention, the double-sided photovoltaic module is mainly composed of a front photovoltaic glass, a back photovoltaic glass 10 and then a plurality of cells 20, the cell 20 is located between the front photovoltaic glass and the back photovoltaic glass 10, and the plurality of cells 20 are distributed in an array on the back photovoltaic glass 10, and there are gaps between adjacent cells 20, and the gaps are coated with a glaze layer 30, and the edge of the edge of the back photovoltaic glass 10 near the outermost cell 20 is also coated with a glaze layer 30, and the side of the back photovoltaic glass 10 is connected to the corresponding position of the fixing piece to form a glaze-free area 40, that is, when the back photovoltaic glass 10 is arranged The position where the fixing part is installed is not coated with the glaze layer 30. Taking the fixing part as a clamp as an example, the clamp needs to be clamped on the edge of the back photovoltaic glass 10 to realize the installation and fixation of the double-sided photovoltaic module. Then, a stress point will be formed at the position where the back photovoltaic glass 10 is clamped by the clamp. The glaze layer 30 is not coated at the stress position. When the back photovoltaic glass 10 is tempered, there is no glaze layer 30 to affect the tempering temperature at the installation position. The unglazed area 40 will have higher strength after tempering. The side of the back photovoltaic glass 10 and the corresponding connection with the fixing part have higher strength, which improves the load capacity, further improves the overall mechanical properties of the double-sided photovoltaic module, and adapts to more severe outdoor environments.

[0036] Furthermore, there is an obvious height difference between the unglazed area 40 and the glaze layer 30. The unglazed area 40 is a blank area reserved according to the shape and size of the fixing parts. The double-sided photovoltaic modules can make full use of the gap light. When installing the fixing parts, the position where the fixing parts need to be installed can be quickly found, which not only saves the positioning time during installation, but also avoids installation errors. The fixing parts can be quickly installed on the back photovoltaic glass 10, saving installation time and effectively improving installation efficiency.

[0037] Therefore, according to the double-sided photovoltaic module 100 with high-strength glazed ceramic glass of the embodiment of the present invention, by not coating the glaze layer 30 at the position where the back photovoltaic glass 10 is connected to the corresponding fixing part, not only the side of the back photovoltaic glass 10 and the corresponding connection part of the fixing part have higher strength, improve the load capacity, and further improve the overall mechanical properties of the double-sided photovoltaic module, but also the unglazed area 40 is a blank area reserved according to the shape and size of the fixing part. While the double-sided photovoltaic module can make full use of the gap light, when installing the fixing part, it can quickly find the position where the fixing part needs to be installed, which not only saves the positioning time during installation, but also can avoid installation errors, quickly install the fixing part on the back photovoltaic glass 10, save installation time, and effectively improve installation efficiency. The double-sided photovoltaic module has the advantages of fast installation, high overall mechanical strength, and high utilization rate of gap light.

[0038] Further, one side of the unglazed area 40 close to the solar cell 20 forms a contact surface with the glaze layer 30, and the fixing member abuts against the contact surface. That is to say, there is an obvious height difference between the unglazed area 40 and the glaze layer 30, and the formed contact surface has a limiting effect on the fixing member, which can ensure that the fixing member is installed in the unglazed area 40, avoid the contact between the fixing member and the glaze layer 30, and reduce the mechanical strength at the installation position.

[0039] Optionally, the glaze layer 30 at the edge of the back photovoltaic glass 10 is formed into any one of the shapes of "匚", "井" or "王". The special plate design makes the mechanical strength of the back photovoltaic glass 10 stronger, thereby improving the strength of the solar panel and adapting to more severe environments.

[0040] According to an embodiment of the present invention, the width of the glaze layer 30 covering the solar cell 20 is less than 4 mm. Controlling the width of the glaze layer 30 covering the solar cell 20 to be as small as possible can not only ensure the utilization rate of the gap light, but also reduce the influence of the glaze layer 30 covering on the solar cell 20.

[0041] Further, the distance between the glaze layer 30 and the fixing member is greater than 0.5 mm. This distance can ensure that the fixing member does not contact the glaze layer 30.

[0042] Optionally, the fixing member is a clamp or a frame.

[0043] Preferably, when the fixing member is a clamp, the position where the back photovoltaic glass 10 is connected to the clamp forms a plurality of unglazed areas 40. The unglazed area 40 also includes two side edges. The two side edges of the unglazed area 40 respectively form two limiting surfaces with the glaze layer 30, and three sides of the clamp respectively abut against the limiting surfaces and the contact surface. The limiting surfaces and the contact surface limit the clamp. The two limiting surfaces can limit the displacement of the clamp in the up and down directions, and the contact surface limits the displacement of the clamp in the direction towards the solar cell 20, and multiple clamps can be quickly installed. An uneven surface is formed between the plurality of unglazed areas 40 and the glaze layer 30, and this uneven feeling can increase the friction force and facilitate the handling by the staff.

[0044] Further, the length of the unglazed area 40 is greater than the length of the clamp, and the width of the unglazed area 40 is greater than the width of the clamp. Ensure that the clamp is located within the unglazed area 40.

[0045] Preferably, the difference between the length of the unglazed area 40 and the length of the clamp is ≥1 mm, and the difference between the width of the unglazed area 40 and the width of the clamp is ≥1 mm.

[0046] In some specific embodiments of the present invention, when the fixing member is a frame, the width of the unglazed area 40 is greater than or equal to the distance of the frame inserted into the bifacial photovoltaic module. The frame needs to be inserted into the bifacial photovoltaic module to ensure that the frame does not contact the glaze layer 30, thereby improving the mechanical strength of the frame installation location, increasing the load capacity, and further improving the overall mechanical properties of the bifacial photovoltaic module to adapt to more severe outdoor environments.

[0047] In summary, the double-sided photovoltaic module 100 with high-strength glazed ceramic glass according to the embodiment of the present invention solves the problem that the fixture and frame installation position corresponds to the ceramic glaze of the back photovoltaic glass 10, which leads to reduced glass strength, further improves the overall mechanical properties of the double-sided photovoltaic module, adapts to more severe outdoor environments, makes installation positioning more accurate, and saves installation time. While reducing installation errors, it can achieve rapid installation and facilitate transportation. The double-sided photovoltaic module has the advantages of fast installation, high overall mechanical strength, and high utilization of interstitial light.

[0048] It should be noted that the glaze layer 30 of the back photovoltaic glass 10 of this patent adopts a special layout method, so that the overall mechanical strength of the back photovoltaic glass 10 is relatively high, and it can be used as a high-strength glazed ceramic glass in photovoltaic panels.

[0049] The following specific embodiments will be provided to enable those skilled in the art to have a more comprehensive understanding of the present invention, but the present invention is not limited to the scope of the embodiments.

[0050] Example 1

[0051] like Figure 1 As shown, the high-strength glazed ceramic glass of the present invention is mainly composed of the following materials: glass, glaze, and the glaze layer 30 is arranged according to the distribution method of the present invention;

[0052] like Figure 3 As shown, the layout of the traditional glazed ceramic glass glaze, the edges of the glass are also coated with a glaze layer 30.

[0053] Table 1 is a numerical table of impact resistance, surface stress at the fixture, and four-point bending strength obtained by mechanical strength testing of the ceramic glass of the present invention and traditional ceramic glass.

[0054] Table 1 Mechanical strength test results of two types of glass:

[0055]

[0056] Therefore, it can be seen from Table 1 that the mechanical strength of the ceramic glass of this patent is significantly stronger than that of traditional ceramic glass.

[0057] Furthermore, the patented ceramic glass and traditional ceramic glass strength were made into photovoltaic panels and the mechanical strength was tested.

[0058] The size of the photovoltaic panel made of the two types of glass is 2089*1033mm; the glass thickness is 2mm; 6 identical 20cm long and 10cm wide clamps are used; 4 clamps are installed with their centers 30cm away from the edge, and the other two are installed at 1044.5cm from the center of the long side of the panel; pressure is applied to the installed photovoltaic panel to a front pressure of 5400Pa, and static pressure is applied for 1 hour, and then pressure is applied to the back to a pressure of 2400Pa, and static pressure is applied for 1 hour, and this cycle is repeated 3 times.

[0059] Table 2 is a comparison table of the results of the installation time test and the mechanical strength test of the conventional glazed ceramic glass solar panel and the glazed ceramic glass solar panel of the present invention.

[0060] Table 2 Test results of mechanical strength of photovoltaic panels made of two types of ceramic glass:

[0061] Component Type Installation time / s Load conditions Traditional Glazed Ceramic Glass Solar Panels 60s First positive load to 4000pa crushing Patented glazed ceramic glass solar panel 45s Pass 3 cycles of 5400Pa on the front and 2400Pa on the back

[0062] Therefore, from Table 2 we can see that the solar panel made of the back photovoltaic glass of this patent has a short installation time and high mechanical strength.

[0063] Other structures and operations of the double-sided photovoltaic module with high-strength glazed ceramic glass according to the embodiment of the present invention are understandable and easy to implement for those skilled in the art, and thus will not be described in detail.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0065] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A double-sided photovoltaic module with high-strength glazed ceramic glass, characterized in that: The double-sided photovoltaic module is installed and fixed by fixing components. The double-sided photovoltaic module includes: a front photovoltaic glass; a back photovoltaic glass, which is disposed opposite to the front photovoltaic glass and forms a double-layer structure; a plurality of solar cells, which are arranged in an array between the front photovoltaic glass and the back photovoltaic glass, and there are gaps between adjacent solar cells; a glaze layer, which is located at the non-solar cell part of the back photovoltaic glass; An unglazed area is formed at the position where the side of the back photovoltaic glass is correspondingly connected to the fixing component. The height difference between the unglazed area and the glaze layer is the thickness of the glaze layer; the unglazed area is a blank space reserved according to the shape and size of the fixing component; The fixing component is a clamp. Multiple unglazed areas are formed at the positions where the back photovoltaic glass is connected to the clamp. An uneven surface is formed between the multiple unglazed areas and the glaze layer. The unglazed area also includes two sides. The two sides of the unglazed area respectively form two limiting surfaces with the glaze layer. Three sides of the clamp respectively abut against the limiting surfaces and the abutting surface.

2. The double-sided photovoltaic module with high-strength glazed ceramic glass according to claim 1, characterized in that: One side of the unglazed area close to the solar cell forms an abutting surface with the glaze layer, and the fixing component abuts against the abutting surface.

3. The double-sided photovoltaic module with high-strength glazed ceramic glass according to claim 2, characterized in that: The glaze layer at the edge of the back photovoltaic glass forms any one of the shapes of "匚", "井" or "王".

4. The double-sided photovoltaic module with high-strength glazed ceramic glass according to claim 3, characterized in that: The width of the glaze layer covering the solar cell is less than 4 mm.

5. The double-sided photovoltaic module with high-strength glazed ceramic glass according to claim 4, characterized in that: The distance between the glaze layer and the fixing component is greater than 0.5 mm.

6. The double-sided photovoltaic module with high-strength glazed ceramic glass according to claim 1, characterized in that: The length of the unglazed area is greater than the length of the clamp, and the width of the unglazed area is greater than the width of the clamp.

7. The double-sided photovoltaic module with high-strength glazed ceramic glass according to claim 6, characterized in that: The difference between the length of the unglazed area and the length of the clamp is ≥1 mm, and the difference between the width of the unglazed area and the width of the clamp is ≥1 mm.

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