Photovoltaic module

Abstract

The embodiment of the utility model provides a photovoltaic module, the photovoltaic module comprises a cover plate, a battery string and a back plate which are stacked in the height direction, the battery string comprises a plurality of battery pieces arranged in the length direction, a gap is formed between every two adjacent battery pieces, and the battery pieces are in a first color; the photovoltaic module further comprises a shielding film, the shielding film is connected with the battery pieces, the shielding film is used for shielding a gap t between the adjacent battery pieces, the shielding film is of a first color, and in the length direction, the width L1 of the shielding film meets the condition that L1 is larger than or equal to t + 1 mm. The shielding films are arranged at the gaps between the adjacent battery pieces, the gaps between the battery pieces are shielded, the shielding films are made to be in the first color, and even if the colors of the shielding films and the colors of the battery pieces are kept consistent, the overall appearance consistency of the photovoltaic module can be improved. Meanwhile, the width L1 of the shielding film is larger than or equal to t + 1 mm, the connection reliability of the shielding film and the battery piece can be improved, the phenomenon that the shielding film cracks in the using process is avoided, and the service life of the shielding film is prolonged.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and specifically to a photovoltaic module. Background Art

[0002] A photovoltaic module is a module that converts light energy into electrical energy through a crystalline silicon PN-junction semiconductor. Photovoltaic modules are currently widely used in large-scale ground power stations, rooftops, ships, aviation and other fields. A photovoltaic module includes a cover plate, a back plate, and a plurality of solar cells located between the two. There is a gap between adjacent solar cells, and this gap results in poor appearance consistency of the photovoltaic module. Summary of the Utility Model

[0003] In view of this, this application provides a photovoltaic module to facilitate solving the problem of poor appearance consistency of photovoltaic modules in the prior art.

[0004] An embodiment of this application provides a photovoltaic module. The photovoltaic module includes a cover plate, a battery string, and a back plate stacked along a first direction. The battery string includes a plurality of solar cells arranged along a second direction. There is a gap between adjacent solar cells, and the solar cells are of a first color; wherein, the photovoltaic module further includes a shielding film, the shielding film is connected to the solar cells, the shielding film is used to shield the gap t between adjacent solar cells, the shielding film is of the first color, and along the second direction, the width L1 of the shielding film satisfies L1≥t + 1mm.

[0005] In this embodiment, a shielding film is provided at the gap between adjacent solar cells to shield the gap between the solar cells, and the shielding film is of the first color, that is, the color of the shielding film and the solar cells is kept consistent, which can improve the overall appearance consistency of the photovoltaic module. At the same time, the width L1 of the shielding film satisfies L1≥t + 1mm, so that the shielding film can completely shield the gap between the solar cells, and the connection reliability between the shielding film and the solar cells is relatively high, avoiding the phenomenon of cracking of the shielding film during use and extending the service life of the shielding film.

[0006] In a specific embodiment, the solar cell includes two cell halves connected along the second direction. Along the second direction, the width of the shielding film covering the cell half is L2, and the width of the cell half is L3, and L2 / L3 satisfies 0.05≤L2 / L3≤0.5.

[0007] In a specific embodiment, the shielding film is connected to the side of the solar cell facing away from the cover plate, and the width L1 of the shielding film satisfies 40mm≤L1≤100mm.

[0008] In a specific embodiment, the end of the battery half-sheet is provided with a chamfer; along the second direction, there is a first gap between adjacent battery half-sheets, and there is a second gap between adjacent battery sheets, and the shielding film includes a first shielding film and a second shielding film, the first shielding film covers the first gap, and the second shielding film covers the second gap.

[0009] In a specific embodiment, along the second direction, the battery half-cell has a first end and a second end that are relatively arranged, the second end is provided with the chamfer, the length of the first shielding film along the third direction is the same as the length of the first end along the third direction, and the length of the second shielding film is the same as the length of the second end; the back panel is the first color.

[0010] In a specific embodiment, the photovoltaic assembly includes a plurality of battery strings arranged along a third direction; along the third direction, the first shielding films of adjacent battery strings are connected to each other, and a third gap exists between the second shielding films of adjacent battery strings.

[0011] In a specific embodiment, the thickness L4 of the shielding film satisfies 80 μm≤L4≤100 μm.

[0012] In a specific embodiment, the battery string also includes a welding strip located on the side of the battery cell away from the cover plate, the welding strip connects adjacent battery cells, and bus strips are arranged at both ends of the battery string along the second direction; the welding strip is the first color, and the bus strip is the first color.

[0013] In a specific embodiment, the first color is black or blue.

[0014] In a specific embodiment, the cell is an emitter back passivation cell or a tunneling oxide layer passivation contact cell or a heterojunction cell or a back contact cell or a perovskite cell.

[0015] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 This is a schematic structural diagram of a photovoltaic module provided in this application in a specific embodiment;

[0018] Figure 2 Schematic diagram of the photovoltaic module provided in this application in another specific embodiment;

[0019] Figure 3 is Figure 2 Top view when multiple battery strings are arranged in the third direction in

[0020] Figure 4 is Figure 2 Bottom view when multiple battery strings are arranged in the third direction in

[0021] Figure 5 is Figure 3 Schematic diagram of the battery string in

[0022] Figure 6 is Figure 4 Schematic diagram of the battery string in

[0023] Figure 7 is Figure 6 Schematic diagram of the solar cell in

[0024] Figure 8 Bottom view when multiple battery strings in the photovoltaic module provided in this application are arranged in the third direction in another specific embodiment.

[0025] Reference numerals:

[0026] 1 - Photovoltaic module;

[0027] 11 - Battery string;

[0028] 111 - Solar cell;

[0029] 111a - Half solar cell;

[0030] 111b - Chamfer;

[0031] 111c - First end;

[0032] 111d - Second end;

[0033] 111e - First gap;

[0034] 111f - Second gap;

[0035] 112 - Third gap;

[0036] 113 - Welding ribbon;

[0037] 114 - Busbar;

[0038] 115 - Masking film;

[0039] 115a - First masking film;

[0040] 115b - Second light-blocking film;

[0041] 12 - Backsheet;

[0042] 13 - Cover plate;

[0043] 14 - First adhesive film;

[0044] 15 - Second adhesive film;

[0045] 16 - Extension part. Detailed implementation manners

[0046] For a better understanding of the technical solutions of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0047] It should be clear that the described embodiments are only part of the embodiments of this application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope of protection of this application.

[0048] The terms used in the embodiments of this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. The singular forms "a", "the" and "said" used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0049] It should be understood that the term " / and" used herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A / and B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0050] The photovoltaic modules in the prior art include a plurality of solar cells, and there are gaps between adjacent solar cells, which affect the appearance consistency of the photovoltaic modules.

[0051] To solve this technical problem, the embodiments of this application provide a photovoltaic module 1, as Figures 1 to 3As shown, the photovoltaic module 1 includes a cover plate 13, a battery string 11, and a back plate 12 stacked in the first direction Z. The battery string 11 includes a plurality of solar cells 111 arranged in the second direction X. There is a gap between adjacent solar cells 111, and the solar cells 111 are of a first color. The types of the solar cells 111 include, but are not limited to, Passivated Emitter Rear Cell (PERC), Tunnel Oxide Passivated Contact (TOPCON), Heterojunction with Intrinsic Thin-layer (HIT), Back Contact (BC), Perovskite Solar Cells (PSC), etc. In this embodiment, the types of the solar cells 111 in the photovoltaic module 1 are not specifically limited.

[0052] For BC cells, the emitter, surface field, and metal electrodes of the BC cells are all arranged on the back of the cell and are cross-indicated and distributed. The front of the solar cell uses a SiNx / SiOx double-layer antireflection passivation film, so that there is no metal electrode blocking on the front of the cell, enabling the cell to receive more incident light, reducing optical losses, and improving the photoelectric conversion efficiency.

[0053] For TOPCon cells, along its thickness direction, the TOPCon cell sequentially includes a metal silver electrode, a front surface silicon nitride passivation layer, a boron-doped emitter, an N-type base silicon layer, a diffusion doping layer, an ultra-thin silicon oxide, doped polysilicon, silicon nitride, and a metal silver electrode. The back of the cell is composed of a layer of ultra-thin silicon oxide (1 nm - 2 nm) and a layer of phosphorus-doped microcrystalline amorphous mixed Si film, and the two together form a passivated contact structure. This structure can block the recombination of minority carriers, improving the open-circuit voltage and short-circuit current of the cell. The ultra-thin oxide layer allows majority carriers (electrons) to tunnel into the polysilicon layer while blocking the recombination of minority carriers (holes). The good passivation effect of the ultra-thin silicon oxide and the heavily doped silicon film causes the energy band on the surface of the silicon wafer to bend, thus forming a field passivation effect, greatly increasing the probability of electron tunneling, reducing the contact resistance, improving the open-circuit voltage and short-circuit current of the cell, and thus improving the cell conversion efficiency.

[0054] For HIT cells, along its thickness direction, the HIT cell sequentially includes a front surface low-temperature silver electrode, a front surface conductive film, an N-type amorphous silicon film, an intrinsic amorphous silicon film, an N-type base silicon layer, an intrinsic amorphous silicon film, a P-type amorphous silicon film, a back surface conductive film, and a back surface low-temperature silver electrode.

[0055] For a PERC cell, along its thickness direction, the PERC cell sequentially includes a front surface metal silver electrode, a front surface silicon nitride passivation layer, a phosphorus layer emitter, a P-type substrate silicon layer, a local aluminum back surface field, a metal aluminum back electrode, and a back passivation layer (Al2O3 / SiNx). The PERC cell uses a passivation film to passivate the back surface, replacing the full aluminum back surface field, enhancing the internal back reflection of light in the silicon substrate, reducing the back surface recombination rate, and increasing the cell efficiency by 0.5% - 1%.

[0056] For a PSC cell, along its thickness direction, the perovskite cell sequentially includes a substrate material, a conductive thin film, an electron transport layer (titanium dioxide), a perovskite absorption layer (hole transport layer), and a metal cathode. The perovskite material has a high light absorption coefficient and a long carrier diffusion distance. After the photons absorbed by the perovskite material are converted into electrons, they are easily collected by the electrodes with less loss. Therefore, a high photo-generated voltage and current can be generated, making the perovskite exhibit a high photoelectric conversion efficiency.

[0057] The photovoltaic module 1 further includes a first encapsulant film 14 and a second encapsulant film 15. The first encapsulant film 14 is located between the cover plate 13 and the cell 111, and the second encapsulant film 15 is located between the backsheet 12 and the cell 111. During the processing, the cover plate 13, the first encapsulant film 14, multiple cells 111, the second encapsulant film 15, and the backsheet 12 are laminated. During the lamination process, the first encapsulant film 14 and the second encapsulant film 15 are used to encapsulate the cell 111 to prevent the external environment from affecting the performance of the cell 111. After lamination, the first encapsulant film 14 connects the cover plate 13 and the cell 111, and the second encapsulant film 15 connects the backsheet 12 and the cell 111. In addition to the connection function, the first encapsulant film 14 and the second encapsulant film 15 also play roles of light transmission, support, protection, and insulation.

[0058] Among them, the materials of the first encapsulant film 14 and the second encapsulant film 15 can be the same or different. The materials of the first encapsulant film 14 and the second encapsulant film 15 can be one of materials such as ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE), polyvinyl butyral (PVB), etc., and can also be an EPE encapsulant film (EVA-POE-EVA co-extruded structure) or an EP encapsulant film (EVA-POE co-extruded structure).

[0059] The photovoltaic module 1 further includes a shading film 115, such as Figures 1 to 3 shown, the shading film 115 is connected to the cell 111. The shading film 115 is used to shade the gap t between adjacent cells 111. The shading film 115 is of a first color, and along the second direction X, the width L1 of the shading film 115 satisfies L1≥t + 1mm.

[0060] In this embodiment, a shielding film 115 is disposed at the gap between adjacent solar cells 111 to shield the gap between the solar cells 111, and the shielding film 115 is of a first color, that is, the color of the shielding film 115 is made consistent with that of the solar cells 111, which can improve the overall appearance consistency of the photovoltaic module 1. At the same time, the width L1 of the shielding film 115 satisfies L1≥t + 1 mm, so that the shielding film 115 can completely shield the gap between the solar cells 111, and the connection reliability between the shielding film 115 and the solar cells 111 is relatively high, avoiding the phenomenon of cracking of the shielding film 115 during use and extending the service life of the shielding film 115.

[0061] Wherein, in this embodiment, the first direction Z can be the thickness direction of the photovoltaic module 1, and the second direction X can be the length direction of the photovoltaic module 1.

[0062] In a specific embodiment, as Figure 1 shown, along the first direction Z, the shielding film 115 is located on the side of the solar cell facing the cover plate 13, that is, the shielding film 115 can be located on the light-facing surface of the solar cell. At this time, the width L1 of the shielding film 115 can be: 3 mm, 4 mm, 5 mm, 6 mm, etc.

[0063] In this embodiment, when the shielding film 115 is located on the side of the solar cell facing the cover plate 13, the width L1 of the shielding film 115 is slightly larger than the gap t between the solar cells, so as to reduce the shielding area of the shielding film on the solar cells on the premise of ensuring that the shielding film 115 can completely shield the gap between the solar cells, and reduce the influence on the photoelectric conversion efficiency of the photovoltaic module 1. And in this embodiment, the width of the shielding film 115 is small, which can reduce the cost.

[0064] In another specific embodiment, as Figure 2 shown, the shielding film 115 is connected to the side of the solar cell facing away from the cover plate 13, that is, the shielding film 115 is located on the backlight side of the solar cell. At this time, the shielding film 115 will not cause a reduction in the light absorption area of the solar cell, and thus will not cause a reduction in the photoelectric conversion efficiency of the photovoltaic module.

[0065] In this embodiment, the width L1 of the shielding film 115 can satisfy 40 mm≤L1≤100 mm. For example, the width L1 of the shielding film 115 can be 40 mm, 60 mm, 80 mm, 100 mm, etc.

[0066] In this embodiment, the width of L1 should not be too large or too small. When the width of L1 is too small, the contact area between the shielding film 115 and the battery cell is too small, which affects the connection reliability between the shielding film 115 and the battery cell, and the shielding film 115 is prone to cracking during use; when it is too large, the width of the shielding film 115 shielding the battery cell is too large, which is easy to interfere with the main grid welding point on the battery cell, affecting the normal use of the battery cell. Therefore, in this embodiment, when L1 satisfies 40mm≤L1≤100mm, the connection reliability between the shielding film 115 and the battery cell is high, which is convenient for installation and is not easy to interfere with other components on the battery cell.

[0067] In a specific embodiment, Figure 1 , Figure 2 and Figure 7 As shown, the battery cell 111 includes two battery half cells 111a connected along the second direction X, and the shielding film 115 covers part of the battery half cell 111a and is fixedly connected (e.g., bonded) to the covered part of the battery half cell 111a, thereby improving the connection reliability between the shielding film 115 and the battery half cell 111a.

[0068] Along the second direction X, the width of the shielding film 115 covering the battery half sheet 111a is L2, the width of the battery half sheet 111a is L3, and L2 / L3 satisfies 0.05≤L2 / L3≤0.5. That is, L2 / L3 can be 0.05, 0.15, 0.25, 0.4, 0.5, etc.

[0069] In this embodiment, if Figure 1 As shown, L2 / L3 should not be too large or too small. When the shielding film 115 is connected to the side of the battery half-cell 111a facing the cover plate 13 (i.e., the shielding film 115 is located on the light-facing side of the battery cell), if the ratio of L2 / L3 is too large, the shielding area of ​​the shielding film 115 on the upper surface of the battery half-cell 111a will be too large, affecting the overall light absorption efficiency of the battery cell; if the ratio of L2 / L3 is too small, the connection area between the shielding film 115 and the battery half-cell 111a will be too small, affecting the connection reliability between the shielding film 115 and the battery half-cell 111a. Figure 2 As shown, when the shielding film 115 is connected to the side of the battery half cell 111a away from the cover plate 13 (i.e., the shielding film 115 is located on the backlight side of the battery cell), if the ratio of L2 / L3 is too large, the shielding film 115 is likely to interfere with the main grid welding point on the battery half cell 111a, affecting the normal use of the battery cell; if the ratio of L2 / L3 is too small, the connection area between the shielding film 115 and the battery half cell 111a is too small, affecting the connection reliability between the shielding film 115 and the battery half cell 111a. Therefore, when L2 / L3 satisfies 0.05≤L2 / L3≤0.5, the connection reliability between the shielding film 115 and the battery half cell 111a is high, and the overall light absorption efficiency of the battery cell is high.

[0070] In a specific embodiment, as Figure 2 , Figure 5 and Figure 7 shown, a chamfer 111b is provided at the end of the battery half piece 111a; along the second direction X, a first gap 111e is provided between adjacent battery half pieces 111a, and a second gap 111f is provided between adjacent battery pieces 111. The shielding film 115 includes a first shielding film 115a and a second shielding film 115b. The first shielding film 115a covers the first gap 111e, and the second shielding film 115b covers the second gap 111f.

[0071] In this embodiment, since a chamfer 111b is provided at the end of the battery half piece 111a, therefore, along the second direction X, the length of the first gap 111e formed between adjacent battery half pieces 111a is different from the length of the second gap 111f formed between adjacent battery pieces 111. Therefore, the shielding film 115 is provided with a first shielding film 115a and a second shielding film 115b, so that the first shielding film 115a can shield the first gap 111e, and the second shielding film 115b can shield the second gap 111f, which can improve the applicability of the shielding film 115.

[0072] In a specific embodiment, as Figures 5 to 7 shown, along the second direction X, the battery half piece 111a has a first end 111c and a second end 111d which are oppositely arranged. The second end 111d is provided with a chamfer 111b. The length of the first shielding film 115a along the third direction Y is the same as the length of the first end 111c along the third direction Y, and the length of the second shielding film 115b is the same as the length of the second end 111d; the backplane is of a first color.

[0073] In this embodiment, a chamfer 111b is provided at the second end 111d of the battery half piece 111a, so that along the third direction Y, the length of the second end 111d is less than the length of the first end 111c, thereby making the length of the second shielding film 115b less than the length of the first shielding film 115a. When the second gap 111f is covered with the second shielding film 115b, since the second shielding film 115b is consistent with the length of the second end 111d along the third direction Y, the second shielding film 115b cannot shield the gap generated at the chamfer. At this time, making the backplane of the first color, that is, the backplane is the same color as the battery piece 111, can play a role in shielding the gap formed at the chamfer 111b of the adjacent battery pieces 111, thereby improving the overall appearance consistency of the photovoltaic module. In this embodiment, there is no need to additionally provide a shielding film at the chamfer 111b, which simplifies the structure of the photovoltaic module. In a specific embodiment,

[0074] such as Figure 3 , Figure 4 andFigure 7 As shown in the figure, the photovoltaic module includes a plurality of cell strings 11 arranged along the third direction Y; along the third direction Y, the first shielding films 115a of adjacent cell strings 11 are connected to each other, and there is a third gap 112 between the second shielding films 115b of adjacent cell strings 11. As Figure 3 shown, four adjacent cell half-sheets 111a enclose a chamfered area, and the second shielding film 115b does not cover this chamfered area. Among them, the dimension of this chamfered area along the third direction Y is the above-mentioned third gap 112.

[0075] In this embodiment, along the third direction Y, the first ends 111c of adjacent cell half-sheets 111a are connected to each other, so that the adjacent first shielding films 115a are connected to each other; along the third direction Y, since the second ends 111d of the cell half-sheets 111a are provided with chamfers 111b, and the second shielding film 115b has the same length as the second ends 111d, a third gap 112 is formed between the adjacent second shielding films 115b. Therefore, making the backsheet have a first color, that is, making the color of the backsheet consistent with that of the cell 111, can play a role in shielding the third gap 112, thereby improving the overall appearance consistency of the photovoltaic module. And in this embodiment, there is no need to make the second shielding film 115b cover the above-mentioned chamfered area, which can reduce the usage amount of the second shielding film 115b and reduce the cost.

[0076] Among them, in this embodiment, the third direction Y can be the width direction of the photovoltaic module.

[0077] In another embodiment, as Figure 8 shown, along the third direction Y, extension parts 16 are provided at both ends of the second shielding film 115b. The second shielding film 115b covers the second gap, and the extension parts cover the above-mentioned chamfered area, improving the shielding effect of the shielding film and further improving the appearance consistency of the photovoltaic module. At this time, the color of the backsheet can be the first color, or it can also be other colors different from the first color.

[0078] In each of the above embodiments, as Figure 1 and Figure 2 shown, the thickness L4 of the shielding film 115 satisfies 80μm ≤ L4 ≤ 100μm. For example, the thickness L4 of the shielding film 115 can be 80μm, 90μm, 100μm, and so on.

[0079] In this embodiment, L4 should not be too large or too small. When it is too small, it affects the strength of the shielding film 115, and the shielding film 115 is likely to be damaged during assembly or use, and the light transmittance of the shielding film 115 is enhanced, reducing the shielding effect of the shielding film 115; when it is too large, as Figure 1As shown, when the light-shielding film 115 is connected to the side of the battery cell facing the cover plate 13, if the thickness of the light-shielding film 115 is too large, it is likely to cause a large height difference in the first direction Z between the area where the first adhesive film 14 is connected to the light-shielding film 115 and other areas, affecting the surface flatness of the first adhesive film 14; for example Figure 2 As shown, when the light-shielding film 115 is connected to the side of the battery cell facing away from the cover plate 13, if the thickness of the light-shielding film 115 is too large, it is likely to cause a large height difference in the first direction Z between the area where the second adhesive film 15 is connected to the light-shielding film 115 and other areas, affecting the flatness of the second adhesive film 15. Therefore, in this embodiment, when the thickness L4 of the light-shielding film 115 satisfies 80μm ≤ L4 ≤ 100μm, the strength and light-shielding effect of the light-shielding film 115 are better, and the influence of the light-shielding film 115 on the flatness of the first adhesive film 14 and the second adhesive film 15 is smaller.

[0080] For example Figures 3 to 6 As shown, the battery string 11 may further include a welding tape 113 on the side of the battery cell 111 facing away from the cover plate 13, and the welding tape 113 is used to connect adjacent battery cells 111; bus bars 114 are provided at both ends of the battery string 11 along the second direction X, and the bus bars 114 are used to connect adjacent battery strings 11. In the prior art, when the photovoltaic module is in use, the welding tape and the bus bar will produce reflection, affecting the appearance consistency of the photovoltaic module and reducing the light absorption efficiency of the battery cell.

[0081] To solve this technical problem, the welding tape 113 in the photovoltaic module 1 provided in the embodiment of the present application is of the first color, and the bus bar 114 is of the first color, that is, the welding tape 113 and the bus bar 114 are the same color as the battery cell 111 and the light-shielding film 115, thereby improving the appearance consistency of the photovoltaic module 1. And along the first direction Z, the color and refractive index of the side of the battery string 11 facing the cover plate 13 are kept consistent, and the color and reflectivity of the side of the battery string 11 facing the back plate 12 are kept consistent, further improving the overall light absorption efficiency of the battery string 11.

[0082] Among them, in the embodiment of the present application, the welding tape 113 and the bus bar 114 in the photovoltaic module 1 can directly use the welding tape 113 and the bus bar 114 of the first color, or paste a film with the first color on the conventional welding tape 113 and bus bar 114.

[0083] In a specific embodiment, the first color may be black or blue.

[0084] In this embodiment, when the battery cell 111 is black, the above-mentioned light-shielding film 115, bus bar and welding tape are black; when the battery cell is blue, the above-mentioned light-shielding film 115, bus bar and welding tape are blue. Since black or blue has a darker color, it can improve the light absorption effect of the photovoltaic module 1.

[0085] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A photovoltaic module, characterized in that: The photovoltaic module (1) comprises a cover plate (13), a battery string (11) and a back plate (12) stacked in a first direction, the battery string (11) comprises a plurality of battery cells (111) arranged in a second direction, there is a gap between adjacent battery cells (111), and the battery cells (111) are of a first color; The photovoltaic module (1) further comprises a shielding film (115), the shielding film (115) being connected to the battery cell (111), the shielding film (115) being used to shield a gap t between adjacent battery cells (111), the shielding film (115) being a first color, and along a second direction, a width L1 of the shielding film (115) satisfies L1≥t+1 mm.

2. The photovoltaic module according to claim 1, characterized in that: The battery cell (111) comprises two battery half cells (111a) connected along a second direction; along the second direction, the shielding film (115) covers the battery half cell (111a) with a width of L2; the width of the battery half cell (111a) is L3, and L2 / L3 satisfies 0.05≤L2 / L3≤0.

5.

3. The photovoltaic module according to claim 2, characterized in that: The shielding film (115) is connected to a side of the battery sheet (111) that is away from the cover plate (13), and a width L1 of the shielding film (115) satisfies 40 mm ≤ L1 ≤ 100 mm.

4. The photovoltaic module according to claim 2, characterized in that: The end of the battery half sheet (111a) is provided with a chamfer (111b); along the second direction, there is a first gap (111e) between adjacent battery half sheets (111a), and there is a second gap (111f) between adjacent battery sheets (111); the shielding film (115) comprises a first shielding film (115a) and a second shielding film (115b); the first shielding film (115a) covers the first gap (111e), and the second shielding film (115b) covers the second gap (111f).

5. The photovoltaic module according to claim 4, characterized in that: Along the second direction, the battery half sheet (111a) has a first end (111c) and a second end (111d) that are arranged opposite to each other, the second end (111d) is provided with the chamfer (111b), the length of the first shielding film (115a) along the third direction is the same as the length of the first end (111c) along the third direction, and the length of the second shielding film (115b) is the same as the length of the second end (111d); The back panel (12) is of a first color.

6. The photovoltaic module according to claim 5, characterized in that: The photovoltaic assembly (1) comprises a plurality of battery strings (11) arranged along a third direction; Along the third direction, the first shielding films (115a) of adjacent battery strings (11) are connected to each other, and a third gap (112) is provided between the second shielding films (115b) of adjacent battery strings (11).

7. The photovoltaic module according to any one of claims 1 to 6, characterized in that: The thickness L4 of the shielding film (115) satisfies 80 μm≤L4≤100 μm.

8. The photovoltaic module according to any one of claims 1 to 6, characterized in that: The battery string (11) further comprises a welding strip (113) located on a side of the battery cell (111) away from the cover plate (13), the welding strip (113) connecting adjacent battery cells (111), and busbars (114) are provided at both ends of the battery string (11) along the second direction; The welding strip (113) is of a first color, and the busbar (114) is of a first color.

9. The photovoltaic module according to any one of claims 1 to 6, characterized in that: The first color is black or blue.

10. The photovoltaic module according to any one of claims 1 to 6, characterized in that: The cell (111) is an emitter back-passivated cell or a tunneling oxide layer passivated contact cell or a heterojunction cell or a back-contact cell or a perovskite cell.

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