Photovoltaic module

Abstract

The utility model provides a photovoltaic module. The photovoltaic module comprises a frame, a peripheral reflective film, an insulating barrier film and a plurality of solar cells, the plurality of solar battery pieces are arranged on the inner side of the frame, a creepage area exists between the solar battery piece adjacent to the frame and the frame, at least part of the peripheral reflective film is arranged in the creepage area, and the insulating barrier film is stacked on the surface of the peripheral reflective film and extends to cover the side wall of the peripheral reflective film. The photovoltaic module can improve or avoid the problem of poor creepage while improving the light utilization rate, and has high safety performance.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic component. Background Art

[0002] A solar cell is a device that converts sunlight directly into electricity. Commonly used solar cells are typically in the form of sheets, called solar cells. Individual solar cells have low power output and are easily damaged. Therefore, multiple solar cells are typically electrically connected and further packaged to form practical photovoltaic modules to achieve higher power and a longer lifespan.

[0003] In conventional photovoltaic modules, there are gaps between the solar cells and between the solar cells and the frame. Installing reflective film in these gaps can further reflect light that hits the solar cells, thereby improving light utilization. Traditional reflective film typically includes an aluminum film layer, which has strong conductivity. In photovoltaic modules, there is a creepage zone between the solar cells and the frame. Installing reflective film in this creepage zone can easily lead to poor creepage in the module, posing a safety hazard. Utility Model Content

[0004] Based on this, it is necessary to address the problems in the above background technology and provide a photovoltaic module that can improve or avoid the creepage problem while improving light utilization, so as to improve the safety performance of the photovoltaic module.

[0005] Some embodiments of the present disclosure provide a photovoltaic module comprising a frame, a peripheral reflective film, an insulating barrier film, and a plurality of solar cells;

[0006] The plurality of solar cells are arranged on the inner side of the frame, a creepage zone exists between the solar cells adjacent to the frame and the frame, at least a portion of the peripheral reflective film is arranged in the creepage zone, and the insulating barrier film is stacked on the surface of the peripheral reflective film and extends to cover the sidewalls of the peripheral reflective film.

[0007] In some embodiments of the present disclosure, a gap is provided between the solar cell sheet adjacent to the frame and the insulating barrier film, exposing the peripheral reflective film.

[0008] In some embodiments of the present disclosure, a distance between the solar cell sheet adjacent to the frame and the insulating barrier film is 3 mm to 9 mm.

[0009] In some embodiments of the present disclosure, the insulating barrier film satisfies at least one of the following characteristics:

[0010] (1) The insulating barrier film is a polyethylene terephthalate film;

[0011] (2) The thickness of the insulating barrier film is 0.5 mm to 1 mm.

[0012] In some embodiments of the present disclosure, the photovoltaic module further includes a first encapsulation board and a second encapsulation board, the solar cell sheet, the peripheral reflective film, and the insulating barrier film are all arranged between the first encapsulation board and the second encapsulation board; the peripheral reflective film is laminated on the second encapsulation board, and the insulating barrier film is laminated on a side of the peripheral reflective film away from the second encapsulation board and extends onto the second encapsulation board.

[0013] In some embodiments of the present disclosure, the insulating barrier film satisfies at least one of the following characteristics:

[0014] (1) The width of the insulating barrier film located on the outer reflective film is 1.5 mm to 2.5 mm;

[0015] (2) The width of the portion of the insulating barrier film extending on the second packaging board is 2.5 mm to 3.5 mm.

[0016] In some embodiments of the present disclosure, the peripheral reflective film includes a cell overlapping portion and a creepage protrusion, the cell overlapping portion is located between the solar cell sheet and the second packaging board, and the creepage protrusion is located in the creepage area.

[0017] In some embodiments of the present disclosure, the peripheral reflective film satisfies at least one of the following characteristics:

[0018] (1) The width of the outer reflective film is 8mm~12mm;

[0019] (2) The width of the battery overlap portion is 1.5 mm to 2.5 mm;

[0020] (3) The width of the creepage protrusion is 5.5 mm to 10.5 mm.

[0021] In some embodiments of the present disclosure, the distance between the peripheral reflective film and the frame is less than 10.4 mm, and the distance between the solar cell adjacent to the frame and the frame is ≥12 mm.

[0022] In some embodiments of the present disclosure, the photovoltaic module further includes an inter-cell reflective film, the solar cell sheet is overlapped on at least a portion of the inter-cell reflective film, and the width of the overlap area between the inter-cell reflective film and the solar cell sheet is 1.5 mm to 2.5 mm.

[0023] At least one embodiment of the present disclosure includes a photovoltaic module equipped with a peripheral reflective film and an insulating barrier film. At least a portion of the peripheral reflective film is located in the creepage zone between the solar cell and the frame. The peripheral reflective film reflects light in the creepage zone, thereby improving the photovoltaic module's light utilization efficiency. The insulating barrier film is superimposed on the surface of the peripheral reflective film and extends over the sidewalls of the peripheral reflective film, insulating and blocking the peripheral reflective film from the frame, thereby improving or avoiding creepage problems caused by the sharp distance between the two. Therefore, the photovoltaic module improves light utilization while improving or avoiding creepage problems, thus providing high safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of a partial cross-sectional structure of a photovoltaic module;

[0025] Figure 2 for Figure 1 Schematic diagram of the partially enlarged structure of the peripheral reflective film, insulating barrier film and solar cell;

[0026] Figure 3 This is a schematic top view of the structure in which the inter-cell reflective film, the peripheral reflective film and the insulating barrier film are arranged on the second packaging board.

[0027] The reference numerals and their meanings are as follows:

[0028] 100, frame; 200, outer reflective film; 210, cell overlap; 220, creepage protrusion; 300, insulation barrier film; 400, solar cell; 500, first packaging board; 600, second packaging board; 700, packaging film; 800, inter-cell reflective film. DETAILED DESCRIPTION

[0029] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the embodiments and renderings. The examples provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these examples are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0030] It should be noted that when an element is referred to as being "fixed" to another element, it may be directly fixed to the other element, or it may be fixed to the other element through an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element, or there may be an intermediate element between the two elements. In addition, in the description of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integrated connection. For example, it may be a mechanical connection or an electrical connection. For example, it may be a direct connection, an indirect connection through an intermediate element, or the internal communication of the two elements. It should be understood that those skilled in the art can understand the specific meanings of the above terms according to the specific circumstances without causing ambiguity.

[0031] Unless otherwise specified, in the description of the present invention, terms indicating orientation or positional relationships such as “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside” are based on the orientation or positional relationships shown in the drawings of the utility model. They are only for the convenience and simplification of the description of the content of the utility model and to help readers understand it in conjunction with the drawings. They do not limit or imply that the device or element referred to must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit the implementation of this invention. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items. "More" herein includes combinations of two or more than two items.

[0033] The present disclosure provides a photovoltaic module comprising a frame, a peripheral reflective film, an insulating barrier film, and a plurality of solar cells. The plurality of solar cells are disposed within the inner side of the frame, with a creepage zone existing between adjacent solar cells and the frame. At least a portion of the peripheral reflective film is disposed within the creepage zone, and the insulating barrier film is superimposed on the surface of the peripheral reflective film and extends to cover the sidewalls of the peripheral reflective film.

[0034] At least one embodiment of the present disclosure includes a photovoltaic module equipped with a peripheral reflective film and an insulating barrier film. At least a portion of the peripheral reflective film is located in the creepage zone between the solar cell and the frame. The peripheral reflective film reflects light in the creepage zone, thereby improving the photovoltaic module's light utilization efficiency. The insulating barrier film is superimposed on the surface of the peripheral reflective film and extends over the sidewalls of the peripheral reflective film, insulating and blocking the peripheral reflective film from the frame, thereby improving or avoiding creepage problems caused by the sharp distance between the two. Therefore, the photovoltaic module improves light utilization while improving or avoiding creepage problems, thus providing high safety performance.

[0035] Figure 1 This is a schematic diagram of a partial cross-sectional structure of a photovoltaic module disclosed in the present invention. Figure 1 As shown, the photovoltaic module includes a frame 100, a peripheral reflective film 200, an insulating barrier film 300, and a plurality of solar cells 400. The plurality of solar cells 400 are disposed inside the frame 100. A creepage zone exists between the solar cells 400 adjacent to the frame 100 and the frame 100. The insulating barrier film 300 and at least a portion of the peripheral reflective film 200 are disposed in the creepage zone. The insulating barrier film 300 is superimposed on the surface of the peripheral reflective film 200 and extends to cover the sidewalls of the peripheral reflective film 200.

[0036] In this photovoltaic module, there is a gap between the frame 100 and the solar cell 400. Many random factors can cause slight discharges between the frame 100 and the solar cell 400, which is called creepage. It should be understood that in this article, the "creepage zone" refers to the area between the frame 100 and the adjacent solar cell 400.

[0037] Further, refer to Figure 1 As shown, in this embodiment, the photovoltaic module further includes a first encapsulation panel 500 and a second encapsulation panel 600. The solar cell 400, the peripheral reflective film 200, and the insulating barrier film 300 are all disposed between the first encapsulation panel 500 and the second encapsulation panel 600. The light-receiving surface of the photovoltaic module can be the surface of the first encapsulation panel 500, in which case the first encapsulation panel 500 serves as the front panel of the photovoltaic module, while the backlight surface of the photovoltaic module can be the surface of the second encapsulation panel 600, in which case the second encapsulation panel 600 serves as the back panel of the photovoltaic module.

[0038] As some examples of this embodiment, the first encapsulation plate 500 may be a glass plate.

[0039] As some examples of this embodiment, the second encapsulation plate 600 may be a glass plate.

[0040] Reference Figure 1As shown, the peripheral reflective film 200 is laminated onto the second packaging board 600, and the insulating barrier film 300 is laminated on the side of the peripheral reflective film 200 away from the second packaging board 600 and extends onto the second packaging board 600. The surface of the peripheral reflective film 200 away from the second packaging board 600 serves as the reflective surface, which is used to reflect light. Extending the insulating barrier film 300 from the peripheral reflective film 200 onto the second packaging board 600 facilitates securing the peripheral reflective film 200 with the insulating barrier film 300, ensuring accurate positioning of the insulating barrier film 300 and the reflective film during the actual assembly process. Furthermore, this arrangement allows the peripheral reflective film 200 and the insulating barrier film 300 to be sequentially installed for complete processing, resulting in a relatively simple manufacturing process and good compatibility with existing processes.

[0041] Reference Figure 1 As shown in some examples of this embodiment, a gap may be provided between the solar cell 400 and the insulating barrier film 300 adjacent to the frame 100, exposing the peripheral reflective film 200. It will be appreciated that the peripheral reflective film 200 exposed from the gap can reflect received light back to the solar cell 400, thereby improving the utilization rate of light received by the photovoltaic module.

[0042] Figure 2 for Figure 1 The peripheral reflective film 200, the insulating barrier film 300 and the partially enlarged structural diagram of the solar cell sheet 400 are shown in FIG. Figure 2 As shown in some examples of this embodiment, the distance d1 between the insulating barrier film 300 and the solar cell 400 is 3 mm to 9 mm. Controlling the distance d1 between the insulating barrier film 300 and the solar cell 400 to 3 mm to 9 mm allows sufficient exposure of the peripheral reflective film 200, thereby ensuring that the reflectivity of the peripheral reflective film 200 to the light in the creepage zone is as high as possible while installing the insulating barrier film 300.

[0043] In this example, the distance d1 between the insulating barrier film 300 and the solar cell 400 can be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, or 9 mm, or the distance d1 between the insulating barrier film 300 and the solar cell 400 can be between any two of the above distances.

[0044] Combine Figure 1 and Figure 2As shown, it can be understood that a portion of the insulating barrier film 300 is located on the peripheral reflective film 200. The width of the portion of the insulating barrier film 300 located on the peripheral reflective film 200 is d2. In some examples of this embodiment, the width d2 is 1.5 mm to 2.5 mm. The insulating barrier film 300 blocks incident light to a certain extent. Providing an insulating barrier film 300 of this width on the peripheral reflective film 200 can improve the process window of the insulating barrier film 300 while minimizing its impact on the light reflected by the peripheral reflective film 200.

[0045] In this example, the width d2 of the portion of the insulating barrier film 300 located on the peripheral reflective film 200 can be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, or 2.5 mm, or can be between any two of the above widths.

[0046] Combine Figure 1 and Figure 2 As shown, it can be understood that a portion of the insulating barrier film 300 extends onto the second packaging board 600. The width of the portion of the insulating barrier film 300 extending onto the second packaging board 600 is d3. In some examples of this embodiment, this width d3 is 2.5 mm to 3.5 mm. Extending the insulating barrier film 300 to this width on the second packaging board 600 not only further enhances the insulation blocking effect, but also strengthens the bonding strength between the insulating barrier film 300 and the second packaging board 600.

[0047] In this example, the width d3 of the portion of the insulating barrier film 300 extending above the second packaging board 600 can be 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, or 3.5 mm, or the width d3 can be between any two of the above widths.

[0048] As some examples of this embodiment, the peripheral reflective film 200 includes a cell overlapping portion 210 and a creepage protrusion 220 . The cell overlapping portion 210 is located between the solar cell sheet 400 and the second packaging board 600 , and the creepage protrusion 220 is located in the creepage zone.

[0049] Combine Figure 1 and Figure 2As shown in some examples of this embodiment, the width d4 of the peripheral reflective film 200 is 8 mm to 12 mm. For example, the width d4 of the peripheral reflective film 200 can be 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, 10.5 mm, 11 mm, 11.5 mm, or 12 mm. Alternatively, the width d4 of the peripheral reflective film 200 can be between any two of the aforementioned widths.

[0050] Combine Figure 1 and Figure 2 As shown in some examples of this embodiment, in the peripheral reflective film 200, the width d5 ​​of the cell overlap portion 210 is 1.5mm-2.5mm. Controlling the width d5 ​​of the cell overlap portion 210 to 1.5mm-2.5mm can ensure a more stable connection between the peripheral reflective film 200 and the solar cell 400.

[0051] In this example, the width d5 ​​of the battery overlapping portion 210 can be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, or 2.5 mm, or the width d5 ​​of the battery overlapping portion 210 can be between any two of the above widths.

[0052] Combine Figure 1 and Figure 2 As shown in some examples of this embodiment, the width d6 of the creepage protrusion 220 is 5.5 mm to 10.5 mm. Controlling the width d6 of the creepage overlap portion to 5.5 mm to 10.5 mm is beneficial for improving its ability to reflect edge light while providing sufficient space for the insulating barrier film 300 to be installed.

[0053] In this example, the width d6 of the creepage joint may be 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, or 10.5 mm, or the width d6 of the creepage joint may be between any two of the above widths.

[0054] In this example, the sum of the width d5 ​​of the battery overlapping portion 210 and the width d6 of the creepage overlapping portion is the width d4 of the peripheral reflective film 200 .

[0055] Reference Figure 1As shown in some examples of this embodiment, the photovoltaic module also includes a packaging film 700, which is arranged between the first packaging plate 500 and the second packaging plate 600, and the packaging film 700 is arranged between the insulating barrier film 300 and the first packaging plate 500. The packaging film 700 is used as a bonding layer and a buffer layer between the solar cell 400 and the first packaging plate 500 and the second packaging plate 600. During the actual lamination process, the packaging film 700 melts and solidifies due to heat and has certain deformation, making it difficult to fully fill the creepage zone of the photovoltaic module. The present disclosure can better improve the above-mentioned problems and enhance the safety performance of the photovoltaic module by additionally providing an insulating barrier film 300 covering the side wall of the reflective film.

[0056] As some examples of this embodiment, the insulating barrier film 300 is heat-resistant. For example, the insulating barrier film 300 can maintain its original shape at temperatures up to 180°C. Photovoltaic modules are typically heated to approximately 150°C during the lamination process. Using a heat-resistant insulating barrier film 300 ensures that the insulating barrier film 300 does not significantly deform during the lamination process, thereby ensuring that the insulating barrier film 300 can effectively serve as an insulating spacer.

[0057] As some examples of this embodiment, the insulating barrier film 300 can be a polyethylene terephthalate film (PET film). PET film has good heat resistance and barrier properties, and it remains substantially unchanged during the lamination process of the photovoltaic module. Thus, it can still provide effective insulation after lamination, preventing creepage problems.

[0058] As some examples of this embodiment, the thickness of the insulating barrier film 300 is 0.5 mm to 1 mm. For example, the thickness of the insulating barrier film 300 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1 mm, or the thickness of the insulating barrier film 300 can be in a range between any two of the above thicknesses.

[0059] Combine Figure 1 and Figure 2As shown in some examples of this embodiment, the spacing between the peripheral reflective film 200 and the frame 100 is less than 10.4 mm, and the spacing between the solar cell 400 adjacent to the frame 100 and the frame 100 is ≥ 12 mm. Setting a smaller spacing between the peripheral reflective film 200 and the frame 100 can reduce the area occupied by the ineffective region of the photovoltaic module. The further provided insulating barrier film 300 can insulate and separate the peripheral reflective film 200 from the frame 100, thereby avoiding the problem of poor creepage. In this case, the spacing between the solar cell 400 and the frame 100 constitutes the creepage distance. Setting this creepage distance to greater than 12 mm can also simultaneously avoid the problem of poor creepage between the solar cell 400 and the frame 100.

[0060] Reference Figure 1 As shown in some examples of this embodiment, the photovoltaic module further includes an inter-cell reflective film 800. Figure 3 This is a schematic diagram of the top view of the photovoltaic module in which the inter-cell reflective film 800, the peripheral reflective film 200 and the insulating barrier film 300 are arranged on the second packaging plate 600. Figure 1 and Figure 3 As shown, the solar cell sheet 400 can be overlapped and arranged on the reflective film 800 between cells.

[0061] As some examples of this embodiment, the width of the overlapping area between the inter-cell reflective film 800 and each solar cell panel 400 is 1.5 mm to 2.5 mm.

[0062] In the photovoltaic module of the above embodiment, the insulating barrier film 300 is superimposed on the surface of the peripheral reflective film 200 and extends to cover the sidewalls of the peripheral reflective film 200. This provides insulation and blocking between the peripheral reflective film 200 and the frame 100, thereby improving or avoiding creepage problems caused by the sharp distance between the two. Therefore, the photovoltaic module can improve light utilization while improving or avoiding creepage problems, and has higher safety performance.

[0063] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and these variations and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A photovoltaic module, characterized in that: It comprises a frame (100), a peripheral reflective film (200), an insulating barrier film (300), and a plurality of solar cell sheets (400); A plurality of solar cell sheets (400) are arranged on the inner side of the frame (100); a creepage zone exists between the solar cell sheets (400) adjacent to the frame (100) and the frame (100); the insulating barrier film (300) and at least a portion of the peripheral reflective film (200) are arranged in the creepage zone; the insulating barrier film (300) is superimposed on the surface of the peripheral reflective film (200) and extends to cover the side wall of the peripheral reflective film (200).

2. The photovoltaic module according to claim 1, characterized in that There is a gap between the solar cell sheet (400) adjacent to the frame (100) and the insulating barrier film (300), exposing the peripheral reflective film (200).

3. The photovoltaic module according to claim 2, characterized in that The distance between the solar cell sheet (400) adjacent to the frame (100) and the insulating barrier film (300) is 3 mm to 9 mm.

4. The photovoltaic module according to any one of claims 1 to 3, characterized in that: The insulating barrier film (300) satisfies at least one of the following characteristics: (1) The insulating barrier film (300) is a polyethylene terephthalate film; (2) The thickness of the insulating barrier film (300) is 0.5 mm to 1 mm.

5. The photovoltaic module according to any one of claims 1 to 3, characterized in that: The photovoltaic assembly further comprises a first packaging plate (500) and a second packaging plate (600); the solar cell sheet (400), the peripheral reflective film (200) and the insulating barrier film (300) are all arranged between the first packaging plate (500) and the second packaging plate (600); the peripheral reflective film (200) is laminated on the second packaging plate (600); the insulating barrier film (300) is laminated on a side of the peripheral reflective film (200) away from the second packaging plate (600) and extends onto the second packaging plate (600).

6. The photovoltaic module according to claim 5, characterized in that: The insulating barrier film (300) satisfies at least one of the following characteristics: (1) The width of the portion of the insulating barrier film (300) located on the outer reflective film (200) is 1.5 mm to 2.5 mm; (2) The width of the portion of the insulating barrier film (300) extending above the second packaging plate (600) is 2.5 mm to 3.5 mm.

7. The photovoltaic module according to claim 5, characterized in that The peripheral reflective film (200) comprises a cell overlap portion (210) and a creepage protrusion (220), wherein the cell overlap portion (210) is located between the solar cell sheet (400) and the second packaging board (600), and the creepage protrusion (220) is located in the creepage area.

8. The photovoltaic module according to claim 7, characterized in that: The peripheral reflective film (200) satisfies at least one of the following characteristics: (1) The width of the peripheral reflective film (200) is 8 mm to 12 mm; (2) The width of the battery lap portion (210) is 1.5 mm to 2.5 mm; (3) The width of the creepage protrusion (220) is 5.5 mm to 10.5 mm.

9. The photovoltaic module according to any one of claims 1 to 3 and 6 to 8, characterized in that: The distance between the peripheral reflective film (200) and the frame (100) is less than 10.4 mm, and the distance between the solar cell sheet (400) adjacent to the frame (100) and the frame (100) is greater than or equal to 12 mm.

10. The photovoltaic module according to any one of claims 1 to 3 and 6 to 8, characterized in that: The photovoltaic assembly further comprises an inter-cell reflective film (800), the solar cell sheet (400) is overlapped and arranged on at least a portion of the inter-cell reflective film (800), and the width of the overlap area between the inter-cell reflective film (800) and the solar cell sheet (400) is 1.5 mm to 2.5 mm.

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