Photovoltaic glass and photovoltaic module
By designing the storage tank and through holes on the photovoltaic glass, the problems of EVA glue overflow and bus bar adhesion in the production of photovoltaic modules are solved, and efficient material utilization and stable production of photovoltaic modules are achieved.
Patent Information
- Application Number
- CN202420827737.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-19
AI Technical Summary
During the production process of photovoltaic modules, EVA glue is prone to overflow and stick to the bus bar, resulting in waste of materials and difficulty in installation, and the photovoltaic cell may break.
A photovoltaic glass is designed, with a plurality of recessed storage tanks on the first surface, and a through hole is provided between the bottom surface of the storage tank and the second surface. The cross-sectional area of the through hole is smaller than the area of the bottom surface of the storage tank to accommodate the part of the encapsulating film to reduce overflow and adhesion.
It effectively reduces the overflow of the packaging film and material waste, avoids the bonding between the bus bar and the photovoltaic glass, reduces the risk of photovoltaic cell fracture, and is easy to process and is easy to produce and promote.
Smart Images
Figure CN222621497U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of solar energy, and specifically relates to photovoltaic glass and a photovoltaic component. Background Art
[0002] With the development of TOPCon module technology, photovoltaic modules have occupied an increasingly larger market share. In the process of producing photovoltaic modules, due to the through holes on the photovoltaic glass, there is an encapsulation film such as EVA glue between the photovoltaic glass and the photovoltaic cell. When the busbar passes through the through hole and is laminated, the EVA glue is easy to overflow from the through hole. The bent busbar after lamination will adhere to the EVA glue, which is not conducive to the installation of the junction box and is not convenient for the introduction of automated equipment.
[0003] In order to prevent the busbar from sticking to the EVA glue, a non-stick layer such as a paint cloth is usually added between the busbar and the photovoltaic glass in the prior art. However, this method can neither effectively prevent the EVA glue from overflowing, nor waste manpower and materials. In addition, during the lamination or vacuuming of the through hole, the photovoltaic cell sheet located above the through hole may break.
[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content
[0005] The utility model aims to provide a photovoltaic glass and a photovoltaic module, which can reduce the overflow of the packaging film, reduce material waste, and avoid the adhesion between the bus bar and the photovoltaic glass.
[0006] In order to achieve the above purpose, the technical solution provided by a specific embodiment of the utility model is as follows:
[0007] A photovoltaic glass comprises a first surface and a second surface arranged opposite to each other, wherein the first surface is provided with a plurality of recessed receiving grooves, and a through hole is provided between the bottom surface of the receiving groove and the second surface, wherein the cross-sectional area of the through hole is smaller than the area of the bottom surface of the receiving groove.
[0008] In one or more embodiments of the present invention, the plurality of receiving grooves are distributed in an array, and a through hole is provided between the bottom surface of each receiving groove and the second surface; and / or,
[0009] The cross section of the receiving groove is rectangular, and the cross section of the through hole is circular.
[0010] In one or more embodiments of the present invention, the size of the receiving groove along the first direction is 10 mm to 50 mm, the size of the receiving groove along the second direction is 20 mm to 50 mm, and the second direction is perpendicular to the first direction; and / or,
[0011] The through hole has a diameter of 8 mm to 15 mm.
[0012] In one or more embodiments of the present invention, the depth of the receiving groove is less than or equal to 0.3 mm; and / or,
[0013] The depth of the through hole is 1 mm to 2 mm.
[0014] Another specific embodiment of the present invention provides a technical solution as follows:
[0015] A photovoltaic module, comprising a backplane, a first packaging film, a photovoltaic cell, a second packaging film and a cover plate stacked in sequence, wherein the backplane and / or the cover plate is the aforementioned photovoltaic glass, the first surface of the photovoltaic glass is arranged toward the photovoltaic cell, and the second surface of the photovoltaic glass is arranged away from the photovoltaic cell.
[0016] In one or more embodiments of the present invention, the photovoltaic assembly further includes a plurality of bus bars, which are electrically connected to the photovoltaic cells and pass through the through holes.
[0017] In one or more embodiments of the present invention, a bus bar is provided between two adjacent photovoltaic cells along the first direction.
[0018] In one or more embodiments of the present invention, a dimension of the receiving groove along the first direction is greater than a distance between two adjacent photovoltaic cells along the first direction.
[0019] In one or more embodiments of the present invention, a plurality of welding strips arranged along a first direction are provided on the photovoltaic cell sheet, and the welding strips are electrically connected to the bus bar.
[0020] In one or more embodiments of the present invention, a dimension of the receiving groove along the second direction is greater than a minimum spacing between welding strips on two adjacent photovoltaic cells along the second direction.
[0021] Compared with the prior art, the utility model has the following beneficial effects:
[0022] The utility model provides a photovoltaic glass and a photovoltaic module. The photovoltaic glass is provided with a receiving groove connected to a through hole. In the process of laminating the photovoltaic module, part of the packaging film can be received in the receiving groove, thereby reducing the overflow of the packaging film, reducing the waste of materials, and reducing the thickness of the photovoltaic module. The photovoltaic glass is easy to process and is conducive to production and promotion.
[0023] The utility model can avoid the bus bar and the photovoltaic glass from sticking together through the design of the receiving groove on the photovoltaic glass, which is beneficial to the installation of the junction box and convenient for introduction into automatic equipment; at the same time, it can effectively reduce the occurrence of breakage at the corners of the photovoltaic cell. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0025] Figure 1 This is a schematic cross-sectional structure diagram of the photovoltaic glass in the first embodiment of the utility model;
[0026] Figure 2 This is a schematic diagram of the top view of the photovoltaic glass in the first embodiment of the utility model;
[0027] Figure 3 This is a schematic diagram of the top view of the photovoltaic module in the second embodiment of the present utility model;
[0028] Figure 4 for Figure 3 Schematic diagram of the local cross-sectional structure at AA in the middle;
[0029] Figure 5 for Figure 3 Schematic diagram of the partial cross-sectional structure at the middle BB. DETAILED DESCRIPTION
[0030] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.
[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0033] It should be noted that the “first direction” in this application text is the Figure 3 The direction of the X-axis in the figure is marked with the second direction. Figure 3 The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.
[0034] The technical solution of the present utility model will be described below in conjunction with the accompanying drawings.
[0035] Embodiment 1:
[0036] Reference Figure 1 , Figure 2 As shown, the photovoltaic glass in this embodiment includes a first surface 11 and a second surface 12 arranged opposite to each other, and a plurality of recessed receiving grooves 111 are provided on the first surface 11, and a through hole 121 is provided between the bottom surface of the receiving groove 111 and the second surface 12, and the cross-sectional area of the through hole 121 is smaller than the area of the bottom surface of the receiving groove 111. In the production process of photovoltaic modules, part of the packaging film can be received in the receiving groove 111, thereby reducing the overflow of the packaging film and avoiding the bus bar and the photovoltaic glass from being bonded. The receiving groove 111 is easy to process, which is conducive to the production and promotion of photovoltaic glass.
[0037] Specifically, the cross-section of the receiving groove 111 in the present embodiment is rectangular, the size of the receiving groove 111 along the first direction is 10 mm to 50 mm, and the size of the receiving groove 111 along the second direction is 20 mm to 50 mm. The second direction is perpendicular to the first direction. Exemplarily, the size of the receiving groove 111 along the first direction is 15 mm, and the size of the receiving groove 111 along the second direction is 25 mm. Of course, the present application is not limited to this, and the size of the receiving groove 111 along the first direction can also be 10 mm, or 50 mm, or any value between 10 mm and 50 mm, and the size of the receiving groove 111 along the second direction can also be 20 mm, or 50 mm, or any value between 20 mm and 50 mm.
[0038] The cross section of the through hole 121 in this embodiment is circular, and the aperture of the through hole 121 is 8 mm to 15 mm. For example, the aperture of the through hole 121 is 10 mm. Of course, the present application is not limited thereto, and the aperture of the through hole 121 can also be 8 mm, or 15 mm, or any value between 8 mm and 15 mm.
[0039] In this embodiment, the depth of the receiving groove 111 is less than or equal to 0.3 mm, and the depth of the through hole 121 is 1 mm to 2 mm. For example, the depth of the receiving groove 111 is 0.2 mm, and the depth of the through hole 121 is 1.5 mm. Of course, the present application is not limited thereto, and the depth of the receiving groove 111 can be any value less than or equal to 0.3 mm, and the depth of the through hole 121 can also be 1 mm, or 2 mm, or any value between 1 mm and 2 mm.
[0040] Preferably, the first surface 11 of the photovoltaic glass is provided with a plurality of recessed receiving grooves 111. The plurality of receiving grooves 111 are distributed in an array, and a through hole 121 is provided between the bottom surface of each receiving groove 111 and the second surface 12, and each through hole 121 can allow other structures to pass through.
[0041] Embodiment 2:
[0042] Reference Figure 3 to Figure 5 As shown, the photovoltaic module in this embodiment includes a backplane, a first packaging film 2, a photovoltaic cell 3, a second packaging film and a cover plate stacked in sequence, wherein the backplane and / or the cover plate is the photovoltaic glass 1 of the embodiment. Exemplarily, the photovoltaic module in this embodiment is a double-glass photovoltaic module, and the backplane in this embodiment is the photovoltaic glass 1 shown in the first embodiment, the first surface 11 of the photovoltaic glass 1 is arranged toward the photovoltaic cell 3, and the second surface 12 of the photovoltaic glass 1 is arranged away from the photovoltaic cell 3, a plurality of recessed receiving grooves 111 are arranged on the first surface 11, and a through hole 121 is arranged between the bottom surface of the receiving groove 111 and the second surface 12, and the cross-sectional area of the through hole 121 is smaller than the area of the bottom surface of the receiving groove 111.
[0043] By optimizing the structural design of the backplane, during the lamination process of the photovoltaic module, part of the first packaging film 2 can be accommodated in the receiving groove 111, thereby reducing the overflow of the first packaging film 2, reducing material waste, and reducing the thickness of the photovoltaic module. At the same time, it avoids the bus bar 4 and the photovoltaic glass 1 from sticking to each other, which is beneficial to the installation of the junction box and convenient for introduction into automatic equipment.
[0044] Preferably, the cover plate of the double-glass photovoltaic module in this embodiment may also be the photovoltaic glass shown in Embodiment 1. By optimizing the structural design of the cover plate, during the lamination of the photovoltaic module, part of the second packaging film can be accommodated in the receiving groove of the cover plate, thereby reducing the overflow of the second packaging film, reducing material waste, and further reducing the thickness of the photovoltaic module.
[0045] Of course, the present application is not limited to this. The photovoltaic modules in other embodiments may also be single-glass photovoltaic modules. The photovoltaic glass shown in the cover plate embodiment 1 of the single-glass photovoltaic module can also achieve the same technical effect, which will not be repeated here.
[0046] In order to connect multiple photovoltaic cells 3 in parallel to form a photovoltaic cell array 3 and to gather the output current, and also to facilitate the installation of the junction box, the photovoltaic assembly in this embodiment also includes multiple bus bars 4, which are electrically connected to the photovoltaic cells 3 and pass through the through hole 121. Among them, the bus bar 4 partially protrudes out of the through hole 121, and the height of the bus bar 4 protruding out of the through hole 121 is greater than the shortest distance between the bus bar 4 and the hole wall of the through hole 121. During the lamination process, the bus bar 4 will bend. By limiting the height of the bus bar 4 protruding out of the through hole 121, the bent part of the bus bar 4 can be against the photovoltaic glass 1 without causing it to be embedded in the through hole 121.
[0047] Specifically, a bus bar 4 is provided between two adjacent photovoltaic cells 3 along the first direction, so as to electrically connect the two adjacent photovoltaic cells 3 together.
[0048] In order to electrically connect the photovoltaic cell 3 with the bus bar 4 , a plurality of welding strips arranged along a first direction are provided on the photovoltaic cell 3 in this embodiment, and the welding strips are electrically connected to the bus bar 4 .
[0049] For example, refer to Figure 3 to Figure 5 As shown, taking a photovoltaic module with photovoltaic cells 3 distributed in a 2×2 array as an example, the photovoltaic module in this embodiment is a double-glass photovoltaic module, the backplane of the double-glass photovoltaic module is the photovoltaic glass 1 shown in Example 1, the welding strip includes a first welding strip 5 arranged on the light-receiving surface of the photovoltaic cell 3 and a second welding strip 6 arranged on the backlight surface of the photovoltaic cell 3, the bus bar 4 includes a first bus bar 41 and a second bus bar 42, two adjacent photovoltaic cells 3 along the first direction are electrically connected to the first bus bar 41 or the second bus bar 42 through the first welding strip 5 or the second welding strip 6, one of the two adjacent photovoltaic cells 3 along the second direction is electrically connected to the first bus bar 41 through the first welding strip 5, and the other is electrically connected to the second bus bar 42 through the second welding strip 6.
[0050] Furthermore, the dimension of the receiving groove 111 in the present embodiment along the first direction is greater than the spacing between two adjacent photovoltaic cells 3 along the first direction. The dimension of the receiving groove 111 along the second direction is greater than the minimum spacing between the welding strips on two adjacent photovoltaic cells 3 along the second direction. That is, on the plane where the photovoltaic glass 1 is located, the orthographic projection of the corner of the photovoltaic cell 3 is located in the orthographic projection of the receiving groove 111.
[0051] Preferably, the size of the receiving groove 111 in the present embodiment along the first direction is 10 mm to 50 mm, and the size of the receiving groove 111 along the second direction is 20 mm to 50 mm. The cross section of the through hole 121 in the present embodiment is circular, and the aperture of the through hole 121 is 8 mm to 15 mm. The depth of the receiving groove 111 in the present embodiment is less than or equal to 0.3 mm, and the depth of the through hole 121 is 1 mm to 2 mm.
[0052] By designing the dimensions of the receiving groove and the through hole, it is possible to prevent the photovoltaic glass 1 from applying excessive pressure to the corners of the photovoltaic cell 3 during the lamination process, thereby causing it to break; or, it is possible to prevent the photovoltaic cell 3 located above the receiving groove 111 from breaking during the process of evacuating the through hole 121.
[0053] It can be seen from the above technical solutions that the utility model has the following beneficial effects:
[0054] The utility model provides a photovoltaic glass and a photovoltaic module. The photovoltaic glass is provided with a receiving groove connected to a through hole. In the process of laminating the photovoltaic module, part of the packaging film can be received in the receiving groove, thereby reducing the overflow of the packaging film, reducing the waste of materials, and reducing the thickness of the photovoltaic module. The photovoltaic glass is easy to process and is conducive to production and promotion.
[0055] The utility model can avoid the bus bar and the photovoltaic glass from sticking together through the design of the receiving groove on the photovoltaic glass, which is beneficial to the installation of the junction box and convenient for introduction into automatic equipment; at the same time, it can effectively reduce the occurrence of breakage at the corners of the photovoltaic cell.
[0056] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
[0057] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A photovoltaic glass, characterized in that: The photovoltaic glass includes a first surface and a second surface arranged opposite to each other, the first surface is provided with a plurality of recessed receiving grooves, a through hole is provided between the bottom surface of the receiving groove and the second surface, and the cross-sectional area of the through hole is smaller than the area of the bottom surface of the receiving groove.
2. The photovoltaic glass according to claim 1, characterized in that: The plurality of receiving grooves are distributed in an array, and a through hole is provided between the bottom surface of each receiving groove and the second surface; and / or, The cross section of the receiving groove is rectangular, and the cross section of the through hole is circular.
3. The photovoltaic glass according to claim 1, characterized in that: The size of the receiving groove along the first direction is 10 mm to 50 mm, the size of the receiving groove along the second direction is 20 mm to 50 mm, and the second direction is perpendicular to the first direction; and / or, The through hole has a diameter of 8 mm to 15 mm.
4. The photovoltaic glass according to claim 1, characterized in that: The depth of the receiving groove is less than or equal to 0.3 mm; and / or, The depth of the through hole is 1 mm to 2 mm.
5. A photovoltaic module, characterized in that: The photovoltaic module includes a backplane, a first packaging film, a photovoltaic cell, a second packaging film and a cover plate stacked in sequence, the backplane and / or the cover plate is the photovoltaic glass as described in any one of claims 1 to 4, the first surface of the photovoltaic glass is arranged toward the photovoltaic cell, and the second surface of the photovoltaic glass is arranged away from the photovoltaic cell.
6. The photovoltaic module according to claim 5, characterized in that: The photovoltaic assembly further includes a plurality of bus bars, which are electrically connected to the photovoltaic cells and pass through the through holes of the photovoltaic glass.
7. The photovoltaic module according to claim 5, characterized in that: A bus bar is provided between two adjacent photovoltaic cells along the first direction.
8. The photovoltaic module according to claim 7, characterized in that: The dimension of the receiving groove of the photovoltaic glass along the first direction is greater than the distance between two adjacent photovoltaic cells along the first direction.
9. The photovoltaic module according to claim 5, characterized in that: The photovoltaic cell sheet is provided with a plurality of welding strips arranged along a first direction, and the welding strips are electrically connected to the bus bar.
10. The photovoltaic module according to claim 9, characterized in that: The dimension of the receiving groove of the photovoltaic glass along the second direction is greater than the minimum spacing between the welding strips on two adjacent photovoltaic cells along the second direction.