Photovoltaic module

Abstract

This utility model discloses a photovoltaic module, comprising: a photovoltaic cell, the photovoltaic cell comprising multiple individual cells arranged in multiple rows and columns, with row gaps between adjacent rows and column gaps between adjacent columns; a front cover plate covering one side of the photovoltaic cell; a back cover plate covering the other side of the photovoltaic cell in the thickness direction; a first reflective film disposed on the back cover plate; and a second reflective film comprising at least: a short reflective portion extending from the short edge of the photovoltaic cell towards the center, the projection of the short reflective portion on the plane of the photovoltaic cell partially covering the column gaps in a second direction, and the projections of the first reflective film on the plane of the photovoltaic cell and the second reflective film being staggered. The photovoltaic module according to this utility model embodiment has advantages such as high light energy utilization, high power generation efficiency, and neat and aesthetically pleasing appearance.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and in particular to a photovoltaic module. Background Technology

[0002] In photovoltaic (PV) modules, especially bifacial PV modules, the application of gap-film technology can reflect sunlight back to the PV cells through a reflective film, thereby improving PV efficiency. However, gap-film technology is prone to generating air bubbles in the reflective film areas at the top and bottom edges of the PV module, affecting the module's appearance. Therefore, reflective films are often not installed at the top and bottom edges of PV modules, but this results in the incomplete utilization of solar energy, and PV power generation efficiency still needs to be improved. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a photovoltaic module that has advantages such as high light energy utilization, high power generation efficiency, and neat and aesthetically pleasing appearance.

[0004] To achieve the above objectives, a photovoltaic module is proposed according to an embodiment of the present invention, comprising: a photovoltaic cell, wherein the photovoltaic cell includes multiple individual cells arranged in multiple rows and columns, with row gaps between adjacent rows and column gaps between adjacent columns; a front cover plate covering one side of the photovoltaic cell in the thickness direction; a back cover plate covering the other side of the photovoltaic cell in the thickness direction; and a first reflective film disposed on the back cover plate, wherein the projection of the first reflective film onto the plane of the photovoltaic cell is on the first side. The first reflective film partially covers the row gaps in the upward direction, and / or the projection of the first reflective film on the plane of the photovoltaic cell partially covers the column gaps in the second direction; the second reflective film is disposed on the front cover plate, and the second reflective film includes at least: a short reflective portion, the short reflective portion extending from the short edge of the photovoltaic cell towards the center, and the projection of the short reflective portion on the plane of the photovoltaic cell partially covers the column gaps in the second direction, and the projections of the first reflective film on the plane of the photovoltaic cell and the projections of the second reflective film on the plane of the photovoltaic cell are staggered.

[0005] The photovoltaic module according to the embodiments of this utility model has the advantages of high light energy utilization, high power generation efficiency, and neat and beautiful appearance.

[0006] According to some specific embodiments of the present invention, the photovoltaic cell is constructed in a rectangular shape, and the second reflective film further includes: an edge reflective portion, the edge reflective portion being located between the outer peripheral edge of the photovoltaic cell and the outer peripheral edge of the front cover plate, and the short reflective portion being connected to the inner side of the edge reflective portion.

[0007] According to some specific embodiments of the present invention, the edge reflective portion extends continuously along the outer peripheral edge of the photovoltaic cell onto the front cover plate.

[0008] According to some specific embodiments of the present invention, the edge reflective portion is located on two opposite short sides of the photovoltaic cell, and the edge reflective portion extends continuously along the side it is located on the front cover plate.

[0009] According to some specific embodiments of the present invention, the back cover plate has at least one wire hole in the middle of its length direction, and the second reflective film further includes a central reflective portion that spans the two long sides of the photovoltaic cell and extends along its projection on the plane of the photovoltaic cell in a first direction and covers the wire hole.

[0010] According to some specific embodiments of the present invention, the width of the second reflective film in the short reflective region is less than or equal to the gap between adjacent battery cells.

[0011] Furthermore, the width of the second reflective film in the short reflective region is 1.5mm to 2mm.

[0012] According to some specific embodiments of the present invention, the width of the first reflective film is greater than or equal to the width of the row gaps and / or column gaps it covers.

[0013] According to some specific embodiments of this utility model, the projection of the first reflective film on the plane where the photovoltaic cell is located, plus the projection of the second reflective film on the plane where the photovoltaic cell is located, completely covers the row gap and the column gap.

[0014] According to some specific embodiments of the present invention, the thickness of the first reflective film is greater than the thickness of the second reflective film.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the front cover plate and the second reflective film of a photovoltaic module according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the back cover plate, the first reflective film, and the photovoltaic cell of a photovoltaic module according to an embodiment of the present utility model;

[0019] Figure 3 This is an exploded view of a photovoltaic module according to an embodiment of the present utility model;

[0020] Figure 4 This is a cross-sectional view of a photovoltaic module according to an embodiment of the present utility model;

[0021] Figure label:

[0022] Photovoltaic module 1, photovoltaic cell 100, single cell 101, front cover plate 200, back cover plate 300

[0023] First reflective film 400, second reflective film 500, wire through hole 102, short reflective part 510, central reflective part 520.

[0024] Edge reflective part 530, encapsulating film 600. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0027] In the description of this utility model, "multiple" means two or more.

[0028] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0029] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0030] The photovoltaic module 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0031] like Figures 1-4 As shown, the photovoltaic module 1 according to an embodiment of the present utility model includes: photovoltaic cell 100, front cover plate 200, back cover plate 300, first reflective film 400 and second reflective film 500.

[0032] A photovoltaic cell 100 includes multiple individual cells 101 arranged in multiple rows and columns. There are row gaps between adjacent rows of individual cells 101, and column gaps between adjacent columns of individual cells 101. A front cover plate 200 is disposed on one side of the photovoltaic cell 100 along its thickness direction. A back cover plate 300 is disposed on the other side of the photovoltaic cell 100 along its thickness direction. A first reflective film 400 is disposed on the back cover plate 300, and the projection of the first reflective film 400 onto the plane of the photovoltaic cell 100 partially covers the row gaps in a first direction, and / or, the projection of the first reflective film 400 onto the plane of the photovoltaic cell 100 partially covers the column gaps in a second direction, thereby adapting the first reflective film 400 to reflect sunlight toward the photovoltaic cell 100. The first direction is the width direction of the photovoltaic cell 100, and the second direction is the length direction of the photovoltaic cell 100. The second reflective film 500 is disposed on the front cover plate 200. The second reflective film 500 includes at least a short reflective portion 510, which extends from the short edge of the photovoltaic cell 100 toward the center. The projection of the short reflective portion 510 on the plane of the photovoltaic cell 100 partially covers the gap in the row in the second direction. The projection of the first reflective film 400 on the plane of the photovoltaic cell 100 and the projection of the second reflective film 500 on the plane of the photovoltaic cell 100 are staggered. Thus, the second reflective film 500 is suitable for reflecting sunlight toward the photovoltaic cell 100.

[0033] For example, photovoltaic module 1 is a bifacial photovoltaic module 1, used in high-reflectivity applications such as offshore photovoltaic and lake photovoltaic. Both the front cover plate 200 and the back cover plate 300 are transparent glass. The first reflective film 400 and the second reflective film 500 are both constructed in strip shape. The first reflective film 400 is attached to the side of the front cell facing the photovoltaic cell 100, and the second reflective film 500 is attached to the side of the back cell facing the photovoltaic cell 100. Then, the first reflective film 400 and the second reflective film 500 are both encapsulated between the front cover plate 200 and the back cover plate 300 by an encapsulating film 600.

[0034] Furthermore, in the top-view projection direction, the first reflective film 400 is located at the center of the photovoltaic cell 100, and the second reflective film 500 is located at the edges of the two short sides of the photovoltaic cell 100 and extends a short distance towards the center, that is, a short section of the second reflective film 500 is formed in the upper and lower regions of the photovoltaic cell 100. Since the individual cells 101 are arranged in multiple rows and columns, the first reflective film 400 adapts to the shape of the gap between adjacent individual cells 101, forming multiple horizontal and multiple vertical strip-like structures. The second reflective film 500 extends from the edges of the two short sides of the photovoltaic cell 100 towards the center to form a short strip-like structure.

[0035] According to the photovoltaic module 1 of this utility model embodiment, when the photovoltaic module 1 generates electricity under solar radiation, such as Figure 4 As shown by the middle arrow, some sunlight directly shines on the photovoltaic cell 100, while another portion of sunlight shines through the gaps between the individual cells 101 onto the back cover plate 300. By setting a first reflective film 400 at the gaps between the individual cells 101 on the back cover plate 300, the first reflective area formed by the first reflective film 400 can reflect a portion of the light shining on the back cover plate 300 back to the back of the photovoltaic cell 100 (e.g., ...). Figure 4 (As shown by the solid arrow on the right side of the image), it can also reflect another portion of the light that shines on the back cover 300 to the front cover 200, and then be reflected by the front cover 200 to the front of the photovoltaic cell 100 (e.g., as shown by the solid arrow on the right side of the image). Figure 4 (As shown by the dotted arrow on the right). Therefore, both the front and back sides of the photovoltaic cell 100 can be irradiated, thereby improving the power generation efficiency of the photovoltaic cell 100.

[0036] Furthermore, the second reflective film 500 forms a second reflective area at the position of the second reflective film 500 on the short side of the photovoltaic cell 100 on the front cover plate 200. Projected onto the plane where the photovoltaic cell 100 is located, because the first reflective film 400 and the second reflective film 500 are offset from each other, the second reflective film 500 will not block the photovoltaic cell 100 from directly receiving sunlight, such as... Figure 4 As shown by the middle arrow, the second reflective film 500 in the second reflective area can also reflect the light reflected from the back of the ground, sea, lake, etc., to the front cover plate 200 and then back to the front of the photovoltaic cell 100; and after the light from the back of the ground, sea, lake, etc., is reflected to the front cover plate 200, some of the light is reflected again to the back cover plate 300 of the photovoltaic cell 100, and further reflected from the back cover plate 300 to the photovoltaic cell 100, thereby further improving the utilization efficiency of sunlight.

[0037] In this design, the first reflective film 400 and the second reflective film 500 do not overlap in their projection directions on the plane where the photovoltaic cell 100 is located. Therefore, sunlight shining on the first reflective film 400 is not blocked by the second reflective film 500; similarly, light reflected from the back of the photovoltaic module to the second reflective film 500 is not blocked by the first reflective film 400. In summary, the first reflective area formed by the first reflective film 400 reflects sunlight from the back of the photovoltaic cell 100 to the photovoltaic cell 100. The second reflective area formed by the second reflective film 500 reflects light reflected from the back of the photovoltaic module, such as water, to the front cover plate 200 and back to the front of the photovoltaic cell 100 (e.g., water surface). Figure 4 (As shown by the solid arrow on the left), and the light reflected from the second reflective film 500 is again reflected from the back cover plate 300 of the photovoltaic cell 100 to the back of the photovoltaic cell 100 (as shown by the solid arrow on the left), and the light reflected from the second reflective film 500 is reflected again from the back cover plate 300 of the photovoltaic cell 100 to the back of the photovoltaic cell 100 (as shown by the solid arrow on the left). Figure 4 (As shown by the dashed arrow on the left). The placement of the first reflective film 400 and the second reflective film 500 makes full use of the space of the photovoltaic module 1, thus significantly improving the photovoltaic power generation efficiency.

[0038] Therefore, the photovoltaic module 1 according to the present invention has the advantages of high light energy utilization, high power generation efficiency, and neat and beautiful appearance.

[0039] In some specific embodiments of this utility model, such as Figure 1 As shown, the second reflective film 500 also includes an edge reflective portion 530, which is located between the outer peripheral edge of the photovoltaic cell 100 and the outer peripheral edge of the front cover plate 200, and a short reflective portion 510 is connected to the inner side of the edge reflective portion 530.

[0040] Furthermore, the edge reflector 530 extends continuously along the outer peripheral edge of the photovoltaic cell onto the front cover plate.

[0041] For example, the photovoltaic cell 100 is constructed in a rectangular shape, and the edge reflective portion 530 is located around the outer periphery of the photovoltaic cell 100, that is, the edge reflective portion 530 extends continuously along the long and short sides of the photovoltaic cell 100 on the front cover plate 200. The second reflective film 500 forms reflective areas on all four sides of the photovoltaic cell 100. When light from the ground or water surface around the photovoltaic cell 100 is reflected to the front cover plate 200, it is reflected again by the second reflective film 500 to the front of the photovoltaic cell 100, and the light reflected from the second reflective film 500 is reflected again from the back cover plate 300 to the back of the photovoltaic cell 100. The second reflective film 500 can fill the gap between the outer periphery of the photovoltaic cell 100 and the frame, and sunlight passes through the front cover plate 200 from this area to the edge reflective portion 530, and then is reflected to the photovoltaic cell 100, maximizing the utilization of light from the back and improving the photoelectric conversion efficiency of the back light.

[0042] In some other specific embodiments of this utility model, the edge reflective portion 530 extends continuously along the two opposite short sides of the photovoltaic cell 100 and along the sides it is located on the front cover plate 200. That is, the edge reflective portion 530 can be provided only at the two opposite short sides of the projection of the photovoltaic cell 100 plane, while the long side area of ​​the projection of the photovoltaic cell 100 plane is not provided with the second reflective film.

[0043] In this embodiment, the cost of the second reflective film on the long side of the photovoltaic cell 100 is saved, and sunlight can more easily reach the photovoltaic cell 100 from the long side. This prevents sunlight from being blocked from passing through the front cover plate 200 and reaching the photovoltaic cell 100, ensuring sufficient light penetration to the front of the photovoltaic cell 100 and improving its light absorption capacity. Furthermore, by constructing photovoltaic modules with edge reflective portions 530 on the long side and photovoltaic modules without edge reflective portions 530 on the long side, both types of photovoltaic modules with edge reflective portions 530 can adapt to different application scenarios, offering greater flexibility in layout.

[0044] In some specific embodiments of this utility model, such as Figure 2 As shown, the back cover 300 has at least one wire hole 102 in the middle of its length direction, and the second reflective film 500 is provided with a central reflective portion 520 that spans the two long sides of the photovoltaic cell 100. The projection of the central reflective portion 520 on the plane of the photovoltaic cell 100 extends in the first direction and covers the wire hole 102.

[0045] The back cover plate 300 is provided with a wire-passing hole 102 for guiding the wires of the junction box through the photovoltaic cell 100. To prevent short circuits in the module, the back cover plate 300 does not have a first reflective film 400 at the wire-passing hole 102, thus avoiding interference with wiring and preventing short circuits. Since there is no first reflective film 400 in the area of ​​the wire-passing hole 102, a second reflective film 500 can be further arranged in this area. The second reflective film 500 extends along the width direction of the photovoltaic cell 100, blocking the wire-passing hole 102 from the front while further reflecting the light reflected from the sea or lake surface on the back to the photovoltaic cell 100, achieving a neat and aesthetically pleasing appearance and improving light utilization.

[0046] Furthermore, such as Figure 1 As shown, the second reflective film 500 located on the short side of the photovoltaic cell 100 is configured with a short reflective portion 510 extending in the central direction, and the short reflective portion 510 partially fills the gap between two adjacent rows of single cells 101.

[0047] Specifically, in the projection direction of the photovoltaic module 1 onto the plane of the photovoltaic cells, the first reflective film 400 and the second reflective film 500 do not overlap in the projection direction of the photovoltaic cells, so that sunlight shining on the first reflective film 400 will not be blocked by the second reflective film 500. A gap may be left between the first reflective film 400 and the second reflective film 500, or the edges of the first reflective film 400 and the second reflective film 500 may be flush.

[0048] In some specific embodiments of this invention, the width of the second reflective film 500 in the short reflective portion 510 region is less than or equal to the gap between adjacent battery cells 101. Each column of battery cells 101 forms a photovoltaic string, and each column of photovoltaic strings forms multiple rows of battery cells 101. Different photovoltaic strings are arranged in multiple columns, and the second reflective film 500 specifically fills the gaps between adjacent photovoltaic strings in different rows. Because the short reflective portion 510 of the second reflective film 500 is relatively narrow, a certain gap remains between the second reflective film 500 and the battery cells 101, ensuring that the second reflective film 500 does not obstruct the battery cells 101. Simultaneously, some sunlight can still reach the first reflective film 400 from the front cover plate 200 through this gap, thus providing additional back-side power gain.

[0049] Furthermore, the width of the short reflective portion 510 in the short reflective region of the second reflective film 500 is 1.5mm to 2.0mm. For example, the gap between photovoltaic strings formed by two adjacent columns of cells is 2.0mm, and the gap between two adjacent rows of cells is 0.95mm to 1.05mm. The width of the short reflective portion 510 is equal to the gap between adjacent cells, which is 2.0mm, or the width of the short reflective portion 510 is less than 2.0mm. The second reflective film 500 does not completely cover the gap between adjacent cells, so that some sunlight can still shine through the gap to the back cover plate 300, and then be reflected by the first reflective film 400 to the photovoltaic cell 100, providing the photovoltaic cell 100 with additional back power gain.

[0050] In some specific embodiments of this utility model, the width of the first reflective film 400 is greater than or equal to the width of the row gap and / or column gap it covers.

[0051] Specifically, the area of ​​the first reflective film 400 projected onto the photovoltaic cell 100 between adjacent rows can completely cover the row gaps. The area of ​​the first reflective film 400 projected onto the photovoltaic cell 100 between adjacent columns can completely cover the column gaps. Thus, as... Figure 2 and Figure 4As shown, when sunlight shines on the gaps between adjacent rows and columns of the photovoltaic cell 100, the first reflective film 400 can provide reflection in the gap areas where there is no photovoltaic cell 100, so that the light is reflected back to the photovoltaic cell 100, thereby improving the photoelectric efficiency of the photovoltaic cell 100.

[0052] Understandably, the first reflective films 400 covering the row gaps and column gaps of the projected portion of the photovoltaic cell 100 can be crisscrossed and stacked at the overlapping points of rows and columns. This ensures the continuity of the first reflective films 400 covering the row gaps and column gaps, and makes it easier to attach the first reflective films 400.

[0053] In some specific embodiments of this utility model, the projection of the first reflective film 400 onto the plane where the photovoltaic cell 100 is located, plus the projection of the second reflective film 500 onto the plane where the photovoltaic cell 100 is located, completely covers the row gaps and column gaps.

[0054] In other words, the projection of the first reflective film 400 onto the plane where the photovoltaic cell 100 is located covers a portion of the row gaps and a portion of the column gaps, while the projection of the second reflective film 500 onto the plane where the photovoltaic cell 100 is located covers the remaining portion of the row gaps and the remaining portion of the column gaps. The common projection of the first reflective film 400 and the second reflective film 500 onto the plane can completely cover the row gaps and column gaps of the photovoltaic cell 100. Thus, after the photovoltaic module 1 is assembled, the row gaps and column gaps of the individual cell 101 are completely filled by the first reflective film 400 and the second reflective film 500. Whether light is incident from the front or from the back, it can be reflected by either the first reflective film 400 or the second reflective film 500, thereby maximizing the utilization of the row gaps and column gaps between the individual cells 101 for reflection. This results in more light reaching the photovoltaic cell 100, providing gain to the photovoltaic cell 100 and further improving the photoelectric efficiency.

[0055] In some specific embodiments of this utility model, the first reflective film 400 is a film, and the second reflective film 500 is a glaze film.

[0056] The first reflective film 400 is a flexible thin film with good flexibility and processability. Adhered to the back cover plate 300, the first reflective film 400 achieves a reflectivity of 80%–95%, or even higher, and exhibits high flatness and reflectivity. The second reflective film 500 is a glaze film, specifically a ceramic glaze film. The second reflective film 500 is sintered onto the back cover plate 300 using a glazing process. It possesses advantages such as good aging resistance and weather resistance, making it more suitable for use in high-temperature and high-humidity environments.

[0057] In summary, the first reflective film 400, applied as a laminate, fully utilizes its excellent reflective properties to achieve better reflection of light from the back of the photovoltaic cell 100. The second reflective film 500, sintered onto the front cover plate 200 using glazing, can withstand the harsh environment of high humidity in seawater and the effects of high temperatures. Furthermore, glazed films offer a cost advantage for large-scale production.

[0058] Furthermore, the second reflective film 500 is a titanium dioxide glaze film. Titanium dioxide glaze film has an extremely high refractive index, exceeding 2.7, making it one of the highest refractive indexes among all oxide optical materials. Moreover, titanium dioxide glaze film exhibits high chemical stability, is not easily corroded, and is suitable for use in harsh environments.

[0059] In some specific embodiments of this utility model, such as Figure 4 As shown, the thickness of the first reflective film 400 is greater than the thickness of the second reflective film 500, and the first reflective film 400 and the second reflective film 500 are offset from each other in the projection direction on the plane where the photovoltaic cell is located.

[0060] For example, when the second reflective film 500 uses a coating process, the thickness of the second reflective film 500 using a glazing process is less than the thickness of the first reflective film 400 using a lamination process. By employing a glazing process, the overall thickness of the photovoltaic module 1 can be reduced. Furthermore, the projection directions of the first reflective film 400 and the second reflective film 500 on the plane of the photovoltaic cell are staggered, which avoids the overlapping of the projection directions of the first reflective film 400 and the second reflective film 500 on the plane of the photovoltaic cell. This reduces V-shaped microcracks in the photovoltaic cell 100 during pressing and improves the reliability of the photovoltaic module 1.

[0061] Other configurations and operations of the photovoltaic module 1 according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0063] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A photovoltaic module, characterized in that, include: A photovoltaic cell, comprising multiple individual cells arranged in multiple rows and columns, with row gaps between adjacent rows and column gaps between adjacent columns; A front cover plate, wherein the front cover plate is disposed on one side of the photovoltaic cell in the thickness direction; A back cover plate, wherein the back cover plate is disposed on the other side of the photovoltaic cell in the thickness direction; A first reflective film is disposed on the back cover plate, and the projection of the first reflective film on the plane where the photovoltaic cell is located partially covers the row gap in a first direction, and / or the projection of the first reflective film on the plane where the photovoltaic cell is located partially covers the column gap in a second direction; The second reflective film is disposed on the front cover plate. The second reflective film includes at least a short reflective portion, which extends from the short edge of the photovoltaic cell towards the center. The projection of the short reflective portion on the plane of the photovoltaic cell partially covers the column gap in the second direction. The projections of the first reflective film on the plane of the photovoltaic cell and the projections of the second reflective film on the plane of the photovoltaic cell are staggered.

2. The photovoltaic module according to claim 1, characterized in that, The second reflective film further includes: An edge reflective portion is located between the outer peripheral edge of the photovoltaic cell and the outer peripheral edge of the front cover plate, and a short reflective portion is connected to the inner side of the edge reflective portion.

3. The photovoltaic module according to claim 2, characterized in that, The edge reflective portion extends continuously along the outer peripheral edge of the photovoltaic cell onto the front cover plate.

4. The photovoltaic module according to claim 2, characterized in that, The edge reflective portion is located on the two opposite short sides of the photovoltaic cell, and the edge reflective portion extends continuously along the side it is located on the front cover plate.

5. The photovoltaic module according to claim 1, characterized in that, The back cover plate has at least one wire-passing hole in the middle of its length direction, and the second reflective film further includes: A central reflective portion, which spans the two long sides of the photovoltaic cell, and whose projection on the plane of the photovoltaic cell extends in a first direction and covers the through hole.

6. The photovoltaic module according to claim 5, characterized in that, The width of the second reflective film in the short reflective region is less than or equal to the gap between adjacent battery cells.

7. The photovoltaic module according to claim 6, characterized in that, The width of the second reflective film in the short reflective region is 1.5mm to 2.0mm.

8. The photovoltaic module according to claim 1, characterized in that, The width of the first reflective film is greater than or equal to the width of the row gaps and / or column gaps it covers.

9. The photovoltaic module according to claim 1, characterized in that, The projection of the first reflective film onto the plane where the photovoltaic cell is located, plus the projection of the second reflective film onto the plane where the photovoltaic cell is located, completely covers the row gaps and column gaps.

10. The photovoltaic module according to claim 1, characterized in that, The thickness of the first reflective film is greater than the thickness of the second reflective film.

Images