Photovoltaic module

Abstract

The utility model discloses a photovoltaic module, which comprises a back plate, a battery layer and a cover plate which are stacked in sequence, the photovoltaic module further comprises a gap film located between the battery layer and the cover plate, and the surface, facing the gap film, of the cover plate is provided with a first area covered by the gap film. The surface, facing the gap film, of the back plate is provided with a second area opposite to the first area, the gap film comprises a first base material layer and a reflection structure layer which are sequentially arranged in the direction away from the cover plate, and a first bonding layer is arranged between the first base material layer and the cover plate. At least one anti-UV layer is arranged between the first base material layer and the cover plate. The photovoltaic assembly provided by the utility model can enhance the yellowing resistance of the gap film.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic technology, specifically relating to a photovoltaic module. Background Technology

[0002] The structure of a double-glass photovoltaic module, from front to back, consists of front glass, front encapsulant film, cell layer, back encapsulant film, and back glass. Existing double-glass photovoltaic modules suffer from low edge efficiency of the cells, resulting in low utilization of sunlight. Applying a front gap film to the front glass can reflect light from the cell edges back to the center of the cells, thereby increasing sunlight utilization and further improving module power.

[0003] However, the front gap membrane currently used has poor UV resistance. After being exposed to UV light, the membrane turns yellow, which not only results in substandard appearance but also reduces light transmittance, causing less light to be reflected onto the cells on both sides, thereby reducing the module power.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a photovoltaic module that can enhance the yellowing resistance of the gap membrane.

[0006] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0007] A photovoltaic module includes a backsheet, a battery layer, and a cover plate stacked sequentially. The photovoltaic module also includes a gap film located between the battery layer and the cover plate. The surface of the cover plate facing the gap film has a first region covered by the gap film, and the surface of the backsheet facing the gap film has a second region opposite to the first region. The gap film includes a first substrate layer and a reflective structure layer stacked sequentially in a direction away from the cover plate. A first adhesive layer is provided between the first substrate layer and the cover plate, and at least one UV-resistant layer is included between the first substrate layer and the cover plate.

[0008] In one or more embodiments of the present invention, the UV-resistant layer is a UV-resistant coating, which is disposed on at least one of the surface of the first substrate layer facing the cover plate and the first region.

[0009] In one or more embodiments of the present invention, the surface of the first substrate layer facing the cover plate is provided with an anti-UV coating, and at least a portion of the side surfaces of the first substrate layer are provided with an anti-UV coating.

[0010] In one or more embodiments of the present invention, an anti-UV coating is provided on the first region, and the width of the anti-UV coating is greater than the width of the gap membrane.

[0011] In one or more embodiments of this utility model, the anti-UV coating is a transparent coating.

[0012] In one or more embodiments of the present invention, the UV-resistant layer is the first adhesive layer containing UV-absorbing particles, and / or the first substrate layer containing UV-absorbing particles.

[0013] In one or more embodiments of this utility model, the UV absorbing particles include one or more of benzophenone compound particles, benzotriazole compound particles, and salicylic acid ester compound particles.

[0014] In one or more embodiments of this utility model, the UV absorbing particles are transparent particles.

[0015] In one or more embodiments of the present invention, at least one of the outer surface of the reflective structure layer that is not in contact with the first substrate layer and the second region is provided with an anti-UV coating; or, the reflective structure layer is provided with UV-absorbing particles.

[0016] In one or more embodiments of the present invention, the second region is provided with an anti-UV coating, and the width of the anti-UV coating is greater than the width of the gap membrane.

[0017] In one or more embodiments of the present invention, the gap membrane further includes a second adhesive layer disposed on the side of the reflective structure layer opposite to the first substrate layer, and a second substrate layer disposed on the side of the second adhesive layer opposite to the reflective structure layer;

[0018] The second substrate layer has an upper UV-resistant coating on at least one of the surfaces of the second adhesive layer and the second region, or the second substrate layer has UV-absorbing particles.

[0019] In one or more embodiments of the present invention, the second substrate layer has an anti-UV coating on its surface opposite to the second adhesive layer, and at least a portion of the side surfaces of the second substrate layer have an anti-UV coating.

[0020] In one or more embodiments of the present invention, the second region is provided with an anti-UV coating, and the width of the anti-UV coating is greater than the width of the gap membrane.

[0021] In one or more embodiments of this utility model, the thickness of the UV-resistant coating is less than or equal to 30 μm; or,

[0022] The thickness of the UV-resistant coating is less than or equal to 15 μm.

[0023] In one or more embodiments of the present invention, the battery layer includes a plurality of spaced-apart battery cells, and the gap film portion is located above the battery cells and extends beyond the battery cells.

[0024] Compared with existing technologies, the photovoltaic module of this invention, through the setting of the anti-UV layer, can protect the structure of each layer of the gap film, enhance the yellowing resistance of the gap film, improve the utilization rate of sunlight, and thus further improve the power of the photovoltaic module. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the photovoltaic module in Embodiment 1 of this utility model;

[0027] Figure 2 This is a schematic diagram of the gap membrane in the photovoltaic module of Embodiment 1 of this utility model;

[0028] Figure 3 This is a schematic diagram of the gap membrane in the photovoltaic module of Embodiment 2 of this utility model;

[0029] Figure 4 This is a schematic diagram of the gap membrane in the photovoltaic module of Embodiment 3 of this utility model;

[0030] Figure 5 This is a schematic diagram of the gap membrane in the photovoltaic module of Embodiment 4 of this utility model;

[0031] Figure 6 This is a schematic diagram of the photovoltaic module in Embodiment 5 of this utility model;

[0032] Figure 7 This is a schematic diagram of the gap membrane in the photovoltaic module of Embodiment 5 of this utility model;

[0033] Figure 8 This is a schematic diagram of the gap membrane in the photovoltaic module of Embodiment 6 of this utility model;

[0034] Figure 9 This is a schematic diagram of the photovoltaic module in Embodiment 7 of this utility model;

[0035] Figure 10 This is a schematic diagram of the photovoltaic module in Embodiment 8 of this utility model;

[0036] Figure 11 This is a schematic diagram of the gap membrane in the photovoltaic module of Embodiment 9 of this utility model;

[0037] Figure 12 This is a schematic diagram of the photovoltaic module in Embodiment 10 of this utility model;

[0038] Figure 13 This is a schematic diagram of the photovoltaic module in Embodiment 11 of this utility model;

[0039] Figure 14 This is a schematic diagram of the structure of the gap membrane in the photovoltaic module of Embodiment 11 of this utility model;

[0040] Figure 15 This is a schematic diagram of the structure of the gap membrane in the photovoltaic module of Embodiment 12 of this utility model;

[0041] Figure 16 This is a schematic diagram of the structure of the gap membrane in the photovoltaic module in Embodiment 13 of this utility model. Detailed Implementation

[0042] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0043] This utility model discloses a photovoltaic module, including a backsheet, a battery layer, and a cover plate stacked sequentially. The photovoltaic module also includes a gap film located between the battery layer and the cover plate. The surface of the cover plate facing the gap film has a first region covered by the gap film, and the surface of the backsheet facing the gap film has a second region opposite to the first region. The gap film includes a first substrate layer and a reflective structure layer stacked sequentially along the direction away from the cover plate. A first adhesive layer is provided between the first substrate layer and the cover plate, and at least one UV-resistant layer is provided between the first substrate layer and the cover plate.

[0044] In one embodiment, the UV-resistant layer is a UV-resistant coating disposed on at least one of the surface of the first substrate layer facing the cover plate and the first region. The UV-resistant coating is a transparent coating.

[0045] In one embodiment, the UV-resistant layer is a first adhesive layer containing UV-absorbing particles, and / or a first substrate layer containing UV-absorbing particles. The UV-absorbing particles are transparent particles.

[0046] In one embodiment, an anti-UV coating is provided on at least one of the outer surface and the second region of the reflective structure layer that are not in contact with the first substrate layer; or, UV-absorbing particles are provided within the reflective structure layer.

[0047] In one embodiment, the gap membrane further includes a second adhesive layer disposed on the side of the reflective structure layer opposite to the first substrate layer, and a second substrate layer disposed on the side of the second adhesive layer opposite to the reflective structure layer; an upper anti-UV coating is provided on at least one of the surface of the second substrate layer opposite to the second adhesive layer and the second region, or UV-absorbing particles are provided in the second substrate layer.

[0048] The photovoltaic module of this invention, through the setting of the anti-UV layer, can enhance the yellowing resistance of the gap film, improve the utilization rate of sunlight, and increase the power of the photovoltaic module; furthermore, by setting the gap film between the cover plate and the cell layer, it can reduce the loss of sunlight caused by passing through multiple layers of adhesive film at the gap, improve the utilization efficiency of sunlight incident on the edge of the cell, increase the light utilization rate, and improve the power of the photovoltaic module.

[0049] The present invention will be further explained below with reference to specific examples.

[0050] Example 1:

[0051] like Figure 1 and Figure 2 The diagram shown is a structural schematic of the photovoltaic module and the gap membrane in this embodiment. In this embodiment, the photovoltaic module includes a cover plate 20 and a back plate 40 disposed opposite to each other, and a battery layer 30 encapsulated between the cover plate 20 and the back plate 40. The battery layer 30 includes a plurality of spaced-apart battery cells 31.

[0052] In this embodiment, the cover plate 20 is a transparent glass cover plate. The back plate 40 is a back plate that blocks UV light, such as white glass.

[0053] It is understandable that the backsheet can also be a transparent glass backsheet, and there is an adhesive film layer between the backsheet and the battery layer. The adhesive film layer has a blocking effect on UV light, such as a white adhesive film.

[0054] The photovoltaic module also includes a gap film 10 located between the cover plate 20 and the cell layer 30. The gap film 10 is disposed between a plurality of spaced-apart cells 31, and at the edge of the cells 31 located at the edge of the entire photovoltaic module.

[0055] When the gap membrane 10 is disposed between a plurality of spaced-apart solar cells 31, the gap membrane 10 covers the gap between adjacent solar cells 31 and extends to cover the edges of the solar cells 31 located on both sides thereof. When the gap membrane 10 is disposed at the edge of a solar cell 31 located at the edge of the entire photovoltaic module, the gap membrane 10 partially covers the edge of the solar cell 31 at the entire edge of the photovoltaic module and partially extends beyond the solar cell 31. The width of the gap membrane 10 extending beyond the solar cell 31 should be greater than the width covering the edge of the solar cell 31.

[0056] By partially covering the edge of the solar cell 31 with the gap membrane 10, the sunlight incident on the edge of the solar cell 31 can be reflected to the middle of the solar cell 31, which improves the utilization efficiency of the sunlight incident on the edge of the solar cell 31, increases the light utilization rate, and can further improve the power of the photovoltaic module.

[0057] By placing the gap membrane 10 between the cover plate 20 and the battery layer 30, the loss of sunlight caused by passing through multiple layers of film at the gap can be reduced, the light utilization rate can be increased, and the power of the photovoltaic module can be further improved.

[0058] The gap membrane 10 includes a first substrate layer 11 and a reflective structure layer 12 arranged sequentially in a direction away from the cover plate 20.

[0059] The first substrate layer 11 includes, but is not limited to, one or more layer structures of PET layer and PE layer. The first substrate layer 11 includes a first surface S1 and a second surface S2 disposed opposite to each other, and the first surface S1 of the first substrate layer 11 of the gap membrane 10 is disposed facing the cover plate 20.

[0060] A reflective structure layer 12 is disposed on the second surface S2 of the first substrate layer 11. The reflective structure layer 12 includes one or more parallel or arrayed prism structures. The prism structures include, but are not limited to, triangular prisms, right-angle prisms, etc. The reflective structure layer 12 can reflect incident light onto the solar cell 31.

[0061] A first adhesive layer 13 is further provided between the first substrate layer 11 of the gap membrane 10 and the cover plate 20. The first adhesive layer 13 includes, but is not limited to, at least one of the following: pressure-sensitive adhesive layer, UV adhesive layer (ultraviolet light curing adhesive layer), EVA layer (ethylene-vinyl acetate copolymer layer), POE layer (polyolefin elastomer layer), EPE layer (ethylene-propylene elastomer layer), and PE layer (polyethylene layer).

[0062] At least one UV-resistant layer is included between the first substrate layer 11 of the gap membrane 10 and the cover plate 20.

[0063] In this embodiment, the surface of the cover plate 20 facing the gap membrane 10 has a first region 20a covered by the gap membrane 10. The UV-resistant layer is a UV-resistant coating 16-1. The UV-resistant coating 16-1 is disposed on the first region 20a of the cover plate 20. The width of the UV-resistant coating 16-1 is greater than the width of the gap membrane 10, which can improve the yellowing resistance of the side of the gap membrane 10. The UV-resistant coating 16-1 disposed on the first region 20a of the cover plate 20 is a transparent coating.

[0064] Anti-UV coatings are common in this field and can block the transmission of UV light.

[0065] The thickness of the UV-resistant coating 16-1 is less than or equal to 30 μm. In order not to affect the light transmittance, preferably, the thickness of the UV-resistant coating 16-1 is less than or equal to 15 μm, which can improve the yellowing resistance of the gap membrane.

[0066] Example 2:

[0067] like Figure 3 The diagram shows the structure of the gap film in the photovoltaic module in this embodiment. The difference between this embodiment and Embodiment 1 is that, in this embodiment, the anti-UV coating 16-2 is not disposed on the first region 20a of the cover plate 20, but rather on the first surface S1 (the surface facing the cover plate 20) of the first substrate layer 11 of the gap film 10. The thickness of the anti-UV coating 16-2 is less than or equal to 30 μm. Preferably, to avoid affecting light transmittance, the thickness of the anti-UV coating 16-2 is less than or equal to 15 μm, which can improve the yellowing resistance of the gap film. The anti-UV coating 16-1 disposed on the first surface S1 of the first substrate layer 11 is also a transparent coating.

[0068] Example 3:

[0069] like Figure 4 The diagram shows the structure of the gap membrane in the photovoltaic module in this embodiment. The difference between this embodiment and Embodiment 2 is that, in this embodiment, the anti-UV coating 16-3 is not only disposed on the first surface S1 of the first substrate layer 11 of the gap membrane 10, but also extends to all sides of the first substrate layer 11. The thickness of the anti-UV coating 16-3 is less than or equal to 30 μm. To avoid affecting light transmittance, preferably, the thickness of the anti-UV coating 16-3 is less than or equal to 15 μm, which can improve the yellowing resistance of the gap membrane.

[0070] It should be understood that in other embodiments, the side surface of the first substrate layer 11 may also be partially provided with an anti-UV coating 16-3, which can also improve the yellowing resistance of the gap film, and will not be described in detail here.

[0071] Example 4:

[0072] like Figure 5The diagram shows a schematic of the gap film in the photovoltaic module in this embodiment. The difference between this embodiment and embodiments 1-3 is that, in this embodiment, the gap film 10 further includes a second adhesive layer 14 disposed on the side of the reflective structure layer 12 opposite to the first substrate layer 11, and a second substrate layer 15 disposed on the side of the second adhesive layer 14 opposite to the reflective structure layer 12.

[0073] Example 5:

[0074] like Figure 6 and Figure 7 The diagram shown is a structural schematic of the photovoltaic module and the gap membrane in this embodiment. In this embodiment, the photovoltaic module includes a cover plate 20 and a back plate 40 disposed opposite to each other, and a battery layer 30 encapsulated between the cover plate 20 and the back plate 40. The battery layer 30 includes a plurality of spaced-apart battery cells 31.

[0075] In this embodiment, the cover plate 20 is a transparent glass cover plate. The back plate 40 is a back plate that blocks UV light, such as white glass.

[0076] It is understandable that the backsheet can also be a transparent glass backsheet, and there is an adhesive film layer between the backsheet and the battery layer. The adhesive film layer has a blocking effect on UV light, such as a white adhesive film.

[0077] The photovoltaic module also includes a gap film 10 located between the cover plate 20 and the cell layer 30. The gap film 10 is disposed between a plurality of spaced-apart cells 31, and at the edge of the cells 31 located at the edge of the entire photovoltaic module.

[0078] When the gap membrane 10 is disposed between a plurality of spaced-apart solar cells 31, the gap membrane 10 covers the gap between adjacent solar cells 31 and extends to cover the edges of the solar cells 31 located on both sides thereof. When the gap membrane 10 is disposed at the edge of a solar cell 31 located at the edge of the entire photovoltaic module, the gap membrane 10 partially covers the edge of the solar cell 31 at the entire edge of the photovoltaic module and partially extends beyond the solar cell 31. The width of the gap membrane 10 extending beyond the solar cell 31 should be greater than the width covering the edge of the solar cell 31.

[0079] By partially covering the edge of the solar cell 31 with the gap membrane 10, the sunlight incident on the edge of the solar cell 31 can be reflected to the middle of the solar cell 31, which improves the utilization efficiency of the sunlight incident on the edge of the solar cell 31, increases the light utilization rate, and can further improve the power of the photovoltaic module.

[0080] By placing the gap membrane 10 between the cover plate 20 and the battery layer 30, the loss of sunlight caused by passing through multiple layers of film at the gap can be reduced, the light utilization rate can be increased, and the power of the photovoltaic module can be further improved.

[0081] The gap membrane 10 includes a first substrate layer 11 and a reflective structure layer 12 arranged sequentially in a direction away from the cover plate 20.

[0082] The first substrate layer 11 includes, but is not limited to, one or more layer structures of PET layer and PE layer. The first substrate layer 11 includes a first surface S1 and a second surface S2 disposed opposite to each other, and the first surface S1 of the first substrate layer 11 of the gap membrane 10 is disposed facing the cover plate 20.

[0083] A reflective structure layer 12 is disposed on the second surface S2 of the first substrate layer 11. The reflective structure layer 12 includes one or more parallel or arrayed prism structures. The prism structures include, but are not limited to, triangular prisms, right-angle prisms, etc. The reflective structure layer 12 can reflect incident light onto the solar cell 31.

[0084] A first adhesive layer 13 is further provided between the first substrate layer 11 of the gap membrane 10 and the cover plate 20. The first adhesive layer 13 includes, but is not limited to, at least one of the following: pressure-sensitive adhesive layer, UV adhesive layer (ultraviolet light curing adhesive layer), EVA layer (ethylene-vinyl acetate copolymer layer), POE layer (polyolefin elastomer layer), EPE layer (ethylene-propylene elastomer layer), and PE layer (polyethylene layer).

[0085] At least one UV-resistant layer is included between the first substrate layer 11 of the gap membrane 10 and the cover plate 20.

[0086] In this embodiment, the UV-resistant layer is a first adhesive layer 13 containing UV-absorbing particles. By providing UV-absorbing particles within the first adhesive layer 13, the yellowing resistance of the side surface of the gap membrane 10 can be improved. The UV-absorbing particles within the first adhesive layer 13 are transparent particles, and the UV-absorbing particles are common particulate materials in the art capable of absorbing UV light, including but not limited to one or more of benzophenone compounds, benzotriazole compounds, and salicylic acid ester compounds. The aforementioned UV-absorbing particles have minimal impact on the light transmittance of the first adhesive layer 13, thereby improving the yellowing resistance of the gap membrane.

[0087] Example 6:

[0088] like Figure 8The diagram shows the structural schematic of the gap membrane in the photovoltaic module of this embodiment. The difference between this embodiment and Embodiment 5 is that, in this embodiment, the UV-resistant layer is a first substrate layer 11 containing UV-absorbing particles. By providing UV-absorbing particles within the first substrate layer 11, the yellowing resistance of the side surface of the gap membrane 10 can be improved. The UV-absorbing particles within the first substrate layer 11 are transparent particles, and these particles are common particulate materials in the art capable of absorbing UV light, including but not limited to one or more of benzophenone compounds, benzotriazole compounds, and salicylic acid ester compounds. The aforementioned UV-absorbing particles have minimal impact on the light transmittance of the first substrate layer 11 and can improve the yellowing resistance of the gap membrane.

[0089] It should be understood that, in other embodiments, transparent UV-absorbing particles may be disposed within both the first substrate layer 11 and the first adhesive layer 13. These UV-absorbing particles are common particulate materials in the art capable of absorbing UV light, including but not limited to one or more of benzophenone compounds, benzotriazole compounds, and salicylic acid esters, which can also improve the yellowing resistance of the gap membrane; further details will not be provided here.

[0090] Example 7:

[0091] like Figure 9 The diagram shown is a structural schematic of the photovoltaic module and the gap membrane in this embodiment. In this embodiment, the photovoltaic module includes a cover plate 20 and a back plate 40 disposed opposite to each other, and a battery layer 30 encapsulated between the cover plate 20 and the back plate 40. The battery layer 30 includes a plurality of spaced-apart battery cells 31.

[0092] In this embodiment, the cover plate 20 is a transparent glass cover plate. The back plate 40 is a transparent glass back plate.

[0093] The photovoltaic module also includes a gap film 10 located between the cover plate 20 and the cell layer 30. The gap film 10 is disposed between a plurality of spaced-apart cells 31, and at the edge of the cells 31 located at the edge of the entire photovoltaic module.

[0094] When the gap membrane 10 is disposed between a plurality of spaced-apart solar cells 31, the gap membrane 10 covers the gap between adjacent solar cells 31 and extends to cover the edges of the solar cells 31 located on both sides thereof. When the gap membrane 10 is disposed at the edge of a solar cell 31 located at the edge of the entire photovoltaic module, the gap membrane 10 partially covers the edge of the solar cell 31 at the entire edge of the photovoltaic module and partially extends beyond the solar cell 31. The width of the gap membrane 10 extending beyond the solar cell 31 should be greater than the width covering the edge of the solar cell 31.

[0095] By partially covering the edge of the solar cell 31 with the gap membrane 10, the sunlight incident on the edge of the solar cell 31 can be reflected to the middle of the solar cell 31, which improves the utilization efficiency of the sunlight incident on the edge of the solar cell 31, increases the light utilization rate, and can further improve the power of the photovoltaic module.

[0096] By placing the gap membrane 10 between the cover plate 20 and the battery layer 30, the loss of sunlight caused by passing through multiple layers of film at the gap can be reduced, the light utilization rate can be increased, and the power of the photovoltaic module can be further improved.

[0097] The gap membrane 10 includes a first substrate layer 11 and a reflective structure layer 12 arranged sequentially in a direction away from the cover plate 20.

[0098] The first substrate layer 11 includes, but is not limited to, one or more layer structures of PET layer and PE layer. The first substrate layer 11 includes a first surface S1 and a second surface S2 disposed opposite to each other, and the first surface S1 of the first substrate layer 11 of the gap membrane 10 is disposed facing the cover plate 20.

[0099] A reflective structure layer 12 is disposed on the second surface S2 of the first substrate layer 11. The reflective structure layer 12 includes one or more parallel or arrayed prism structures. The prism structures include, but are not limited to, triangular prisms, right-angle prisms, etc. The reflective structure layer 12 can reflect incident light onto the solar cell 31.

[0100] A first adhesive layer 13 is further provided between the first substrate layer 11 of the gap membrane 10 and the cover plate 20. The first adhesive layer 13 includes, but is not limited to, at least one of the following: pressure-sensitive adhesive layer, UV adhesive layer (ultraviolet light curing adhesive layer), EVA layer (ethylene-vinyl acetate copolymer layer), POE layer (polyolefin elastomer layer), EPE layer (ethylene-propylene elastomer layer), and PE layer (polyethylene layer).

[0101] At least one UV-resistant layer is included between the first substrate layer 11 of the gap membrane 10 and the cover plate 20.

[0102] In this embodiment, the surface of the cover plate 20 facing the gap membrane 10 has a first region 20a covered by the gap membrane 10. The UV-resistant layer is a UV-resistant coating 16-4. The UV-resistant coating 16-4 is disposed on the first region 20a of the cover plate 20, thereby reducing the intensity of UV light incident from the side of the cover plate 20 on the gap membrane 10 and enhancing the yellowing resistance of the gap membrane 10. The width of the UV-resistant coating 16-4 is greater than the width of the gap membrane 10, which can improve the yellowing resistance of the side of the gap membrane 10. The UV-resistant coating 16-4 on the first region 20a of the cover plate 20 is a transparent coating.

[0103] The surface of the backplate 40 facing the gap membrane 10 has a second region 40a opposite to the first region 20a. An anti-UV coating 16-4 is also provided on the second region 40a of the backplate 40, thereby reducing the intensity of UV light incident on the gap membrane 10 from the backplate 40 side and enhancing the yellowing resistance of the gap membrane 10. The width of the anti-UV coating 16-4 is greater than the width of the gap membrane 10, which can improve the yellowing resistance of the side surface of the gap membrane 10. The anti-UV coating 16-4 on the second region 40a of the backplate 40 can be a transparent coating or a non-transparent coating, such as a white glaze coating or a metallic reflective layer.

[0104] Anti-UV coatings are common in this field and can block the transmission of UV light.

[0105] The thickness of the UV-resistant coating 16-4 is less than or equal to 30 μm. To avoid affecting light transmittance, preferably, the thickness of the UV-resistant coating 16-4 is less than or equal to 15 μm, which can improve the yellowing resistance of the gap membrane.

[0106] It should be understood that in other embodiments, the UV-resistant coating 16-4 may not be disposed on the first region 20a of the cover plate 20, but may be disposed on the first surface S1 (the surface facing the cover plate 20) of the first substrate layer 11 of the gap membrane 10, or may extend to all sides of the first substrate layer 11. The UV-resistant coating 16-4 disposed on the first surface S1 of the first substrate layer 11 is also a transparent coating. The thickness of the UV-resistant coating 16-4 is less than or equal to 30 μm. In order not to affect the light transmittance, preferably, the thickness of the UV-resistant coating 16-4 is less than or equal to 15 μm, which can improve the yellowing resistance of the gap membrane, and will not be elaborated here.

[0107] Example 8:

[0108] like Figure 10 The diagram shows a schematic of the photovoltaic module in this embodiment. The difference between this embodiment and Embodiment 7 is that, in this embodiment, the UV-resistant layer between the first substrate layer 11 and the cover plate 20 is no longer a UV-resistant coating, but a first adhesive layer 13 containing UV-absorbing particles. This reduces the intensity of UV light incident from the cover plate 20 side on the gap membrane 10, enhancing the yellowing resistance of the gap membrane 10. By providing UV-absorbing particles within the first adhesive layer 13, the yellowing resistance of the side surface of the gap membrane 10 can be improved. The UV-absorbing particles are transparent particles, and are common particulate materials in the art capable of absorbing UV light, including but not limited to one or more of benzophenone compounds, benzotriazole compounds, and salicylic acid esters. The aforementioned UV-absorbing particles have minimal impact on the light transmittance of the first adhesive layer 13, thus improving the yellowing resistance of the gap membrane.

[0109] It should be understood that, in other embodiments, the UV-resistant layer may also be a first substrate layer 11 containing UV-absorbing particles. The UV-absorbing particles are transparent particles, and the UV-absorbing particles are common particulate materials in the art that can absorb UV light, including but not limited to one or more of benzophenone compound particles, benzotriazole compound particles, and salicylic acid ester compound particles, which can also improve the yellowing resistance of the gap membrane, and will not be described in detail here.

[0110] Example 9:

[0111] like Figure 11 The diagram shows a schematic of the gap film in the photovoltaic module in this embodiment. The difference between this embodiment and embodiments 7 and 8 is that, in this embodiment, after an anti-UV layer is provided between the first substrate layer 11 of the gap film 10 and the cover plate 20, an anti-UV coating is no longer provided on the second region 40a of the backplate 40. Instead, an anti-UV coating 16-5 is provided on the outer surface of the reflective structural layer 12 of the gap film 10 that is not in contact with the second surface S2 of the first substrate layer 11. This reduces the intensity of UV light incident from the backplate 40 side on the gap film 10, enhancing the yellowing resistance of the gap film 10. The thickness of the anti-UV coating 16-5 is less than or equal to 30 μm. Preferably, to avoid affecting the light transmittance, the thickness of the anti-UV coating 16-5 is less than or equal to 15 μm, which can improve the yellowing resistance of the gap film. The anti-UV coating 16-5 provided on the second surface S2 of the reflective structural layer 12 that is not in contact with the first substrate layer 11 can be a transparent coating or a non-transparent coating, such as a white glaze coating or a metallic reflective layer.

[0112] It should be understood that in other embodiments, a transparent or non-transparent anti-UV coating 16-5 may also be partially provided on the outer surface of the reflective structure layer 12 that is not in contact with the second surface S2 of the first substrate layer 11, which can also improve the yellowing resistance of the gap film. This will not be elaborated here.

[0113] Example 10:

[0114] like Figure 12The diagram shown is a schematic representation of the photovoltaic module structure in this embodiment. The difference between this embodiment and embodiments 7 and 8 is that, in this embodiment, after an anti-UV layer is provided between the first substrate layer 11 of the gap membrane 10 and the cover plate 20, an anti-UV coating is not provided on the second region 40a of the back sheet 40. Instead, UV-absorbing particles are provided within the reflective structure layer 12, thereby reducing the intensity of UV light incident from the back sheet 40 side on the gap membrane 10 and enhancing the yellowing resistance of the gap membrane 10. The UV-absorbing particles provided within the reflective structure layer 12 can be transparent or non-transparent. The UV-absorbing particles are common particulate materials in the art capable of absorbing UV light, including but not limited to one or more of benzophenone compounds, benzotriazole compounds, and salicylic acid esters, which can also improve the yellowing resistance of the gap membrane; further details are omitted here.

[0115] Example 11:

[0116] like Figure 13 and Figure 14 The diagram shown is a structural schematic of the photovoltaic module and the gap membrane in this embodiment. In this embodiment, the photovoltaic module includes a cover plate 20 and a back plate 40 disposed opposite to each other, and a battery layer 30 encapsulated between the cover plate 20 and the back plate 40. The battery layer 30 includes a plurality of spaced-apart battery cells 31.

[0117] In this embodiment, the cover plate 20 is a transparent glass cover plate. The back plate 40 is a transparent glass back plate.

[0118] The photovoltaic module also includes a gap film 10 located between the cover plate 20 and the cell layer 30. The gap film 10 is disposed between a plurality of spaced-apart cells 31, and at the edge of the cells 31 located at the edge of the entire photovoltaic module.

[0119] When the gap membrane 10 is disposed between a plurality of spaced-apart solar cells 31, the gap membrane 10 covers the gap between adjacent solar cells 31 and extends to cover the edges of the solar cells 31 located on both sides thereof. When the gap membrane 10 is disposed at the edge of a solar cell 31 located at the edge of the entire photovoltaic module, the gap membrane 10 partially covers the edge of the solar cell 31 at the entire edge of the photovoltaic module and partially extends beyond the solar cell 31. The width of the gap membrane 10 extending beyond the solar cell 31 should be greater than the width covering the edge of the solar cell 31.

[0120] By partially covering the edge of the solar cell 31 with the gap membrane 10, the sunlight incident on the edge of the solar cell 31 can be reflected to the middle of the solar cell 31, which improves the utilization efficiency of the sunlight incident on the edge of the solar cell 31, increases the light utilization rate, and can further improve the power of the photovoltaic module.

[0121] By placing the gap membrane 10 between the cover plate 20 and the battery layer 30, the loss of sunlight caused by passing through multiple layers of film at the gap can be reduced, the light utilization rate can be increased, and the power of the photovoltaic module can be further improved.

[0122] The gap membrane 10 includes a first substrate layer 11, a reflective structure layer 12, a second adhesive layer 14, and a second substrate layer 15 arranged sequentially in a direction away from the cover plate 20.

[0123] The first substrate layer 11 includes, but is not limited to, one or more layer structures of PET layer and PE layer. The first substrate layer 11 includes a first surface S1 and a second surface S2 disposed opposite to each other, and the first surface S1 of the first substrate layer 11 of the gap membrane 10 is disposed facing the cover plate 20.

[0124] A reflective structure layer 12 is disposed on the second surface S2 of the first substrate layer 11. The reflective structure layer 12 includes one or more parallel or arrayed prism structures. The prism structures include, but are not limited to, triangular prisms, right-angle prisms, etc. The reflective structure layer 12 can reflect incident light onto the solar cell 31.

[0125] The second adhesive layer 14 is disposed on the side of the reflective structural layer 12 opposite to the first substrate layer 11. The second adhesive layer 14 is used to bond the reflective structural layer 12 to the second substrate layer 15 together. The second adhesive layer 14 includes, but is not limited to, a UV adhesive layer.

[0126] The second substrate layer 15 is disposed on the side of the second adhesive layer 14 opposite to the reflective structure layer 12. The second substrate layer 15 includes, but is not limited to, one or more layer structures selected from PET layer and PE layer.

[0127] A first adhesive layer 13 is further provided between the first substrate layer 11 of the gap membrane 10 and the cover plate 20. The first adhesive layer 13 includes, but is not limited to, at least one of the following: pressure-sensitive adhesive layer, UV adhesive layer (ultraviolet light curing adhesive layer), EVA layer (ethylene-vinyl acetate copolymer layer), POE layer (polyolefin elastomer layer), EPE layer (ethylene-propylene elastomer layer), and PE layer (polyethylene layer).

[0128] At least one UV-resistant layer is included between the first substrate layer 11 of the gap membrane 10 and the cover plate 20.

[0129] In this embodiment, the surface of the cover plate 20 facing the gap membrane 10 has a first region 20a covered by the gap membrane 10. The UV-resistant layer is a UV-resistant coating 16-6. The UV-resistant coating 16-6 is disposed on the first region 20a of the cover plate 20, thereby reducing the intensity of UV light incident from the side of the cover plate 20 on the gap membrane 10 and enhancing the yellowing resistance of the gap membrane 10. The width of the UV-resistant coating 16-6 is greater than the width of the gap membrane 10, which can improve the yellowing resistance of the side of the gap membrane 10. The UV-resistant coating 16-6 on the first region 20a of the cover plate 20 is a transparent coating.

[0130] A UV-resistant coating 16-6 is provided on the surface of the second substrate layer 15 of the gap membrane 10 facing away from the second adhesive layer 14, thereby reducing the intensity of UV light incident from the back plate 40 side on the gap membrane 10 and enhancing the yellowing resistance of the gap membrane 10. The thickness of the UV-resistant coating 16-6 is less than or equal to 30 μm. To avoid affecting the light transmittance, preferably, the thickness of the UV-resistant coating 16-6 is less than or equal to 15 μm, which can improve the yellowing resistance of the gap membrane. The UV-resistant coating 16-6 on the surface of the second substrate layer 15 facing away from the second adhesive layer 14 can be a transparent coating or a non-transparent coating, such as a white glaze coating, a metallic reflective layer, etc.

[0131] Anti-UV coatings are common in this field and can block the transmission of UV light.

[0132] It should be understood that in other embodiments, the transparent UV-resistant coating 16-6 may not be disposed on the first region 20a of the cover plate 20, but may be disposed on the first surface S1 (the surface facing the cover plate 20) of the first substrate layer 11 of the gap membrane 10, or may extend to all sides of the first substrate layer 11. The thickness of the UV-resistant coating 16-6 is less than or equal to 30 μm. In order not to affect the light transmittance, preferably, the thickness of the UV-resistant coating 16-6 is less than or equal to 15 μm, which can improve the yellowing resistance of the gap membrane, and will not be elaborated here.

[0133] Example 12:

[0134] like Figure 15 The diagram shows the structure of the gap film in the photovoltaic module in this embodiment. The difference between this embodiment and Embodiment 11 is that, in this embodiment, the anti-UV coating 16-7 is not only disposed on the surface of the second substrate layer 15 of the gap film 10 away from the second adhesive layer 14, thereby reducing the intensity of UV light incident from the backsheet 40 side on the gap film 10 and enhancing the yellowing resistance of the gap film 10, but also extends to all sides of the second substrate layer 15. The thickness of the anti-UV coating 16-7 is less than or equal to 30 μm. Preferably, to avoid affecting the light transmittance, the thickness of the anti-UV coating 16-7 is less than or equal to 15 μm, which can improve the yellowing resistance of the gap film.

[0135] It should be understood that in other embodiments, the side surface of the first substrate layer 11 may also be partially provided with an anti-UV coating 16-7, or the entire side surface of the gap membrane 10 may be provided with an anti-UV coating 16-7, which can also improve the yellowing resistance of the gap membrane, and will not be described in detail here.

[0136] It is understood that the UV-resistant coating 16-7 disposed on the surface of the second substrate layer 15 away from the second adhesive layer 14 and / or the UV-resistant coating 16-7 disposed on the side of the first substrate layer 11 and / or the UV-resistant coating 16-7 disposed on all sides of the gap film 10 can all be transparent coatings or all be non-transparent coatings, such as white glaze coatings, metal reflective layers, etc.

[0137] Example 13:

[0138] like Figure 16 The diagram shows a schematic of the gap membrane in the photovoltaic module of this embodiment. The difference between this embodiment and Embodiment 11 is that, in this embodiment, the surface of the second substrate layer 15 of the gap membrane 10 facing away from the second adhesive layer 14 is not provided with an anti-UV coating. Instead, UV-absorbing particles are provided within the second substrate layer 15, thereby reducing the intensity of UV light incident from the backsheet 40 side on the gap membrane 10 and enhancing the yellowing resistance of the gap membrane 10. The UV-absorbing particles within the second substrate layer 15 can be transparent or non-transparent particles. The UV-absorbing particles are common particulate materials in the art that can absorb UV light, including but not limited to one or more of benzophenone compounds, benzotriazole compounds, and salicylic acid esters, which can also improve the yellowing resistance of the gap membrane; further details are omitted here.

[0139] It should be noted that the above embodiments can be combined with each other without contradiction.

[0140] Compared with existing technologies, the photovoltaic module of this invention, through the setting of the anti-UV layer, can protect the structure of each layer of the gap film, enhance the yellowing resistance of the gap film, improve the utilization rate of sunlight, and thus further improve the power of the photovoltaic module.

[0141] This new photovoltaic module reduces the loss of sunlight due to passing through multiple layers of adhesive film at the gap by setting the gap film on the cover plate, thereby improving the utilization efficiency of sunlight incident on the edge of the cell, increasing the light utilization rate, and further improving the power of the photovoltaic module.

[0142] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0143] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A photovoltaic module, characterized in that, The photovoltaic module includes a backsheet, a battery layer, and a cover plate stacked sequentially. The photovoltaic module also includes a gap film located between the battery layer and the cover plate. The surface of the cover plate facing the gap film has a first region covered by the gap film. The surface of the backsheet facing the gap film has a second region opposite to the first region. The gap film includes a first substrate layer and a reflective structure layer stacked sequentially in a direction away from the cover plate. A first adhesive layer is provided between the first substrate layer and the cover plate. At least one UV-resistant layer is provided between the first substrate layer and the cover plate.

2. The photovoltaic module according to claim 1, characterized in that, The UV-resistant layer is a UV-resistant coating, which is disposed on at least one of the surface of the first substrate layer facing the cover plate and the first region.

3. The photovoltaic module according to claim 2, characterized in that, The first substrate layer has an anti-UV coating on its surface facing the cover plate, and at least a portion of the sides of the first substrate layer have an anti-UV coating.

4. The photovoltaic module according to claim 2, characterized in that, The first region is provided with an anti-UV coating, and the width of the anti-UV coating is greater than the width of the gap membrane.

5. The photovoltaic module according to any one of claims 2-4, characterized in that, The UV-resistant coating is a transparent coating.

6. The photovoltaic module according to claim 1, characterized in that, The UV-resistant layer is the first adhesive layer containing UV-absorbing particles, and / or the first substrate layer containing UV-absorbing particles.

7. The photovoltaic module according to claim 6, characterized in that, The UV absorbing particles include one or more of the following: benzophenone compounds, benzotriazole compounds, and salicylic acid esters.

8. The photovoltaic module according to claim 6, characterized in that, The UV-absorbing particles are transparent.

9. The photovoltaic module according to claim 1, characterized in that, At least one of the outer surface of the reflective structure layer that is not in contact with the first substrate layer and the second region is provided with an anti-UV coating; or, the reflective structure layer is provided with UV-absorbing particles.

10. The photovoltaic module according to claim 9, characterized in that, The second region is provided with an anti-UV coating, and the width of the anti-UV coating is greater than the width of the gap membrane.

11. The photovoltaic module according to claim 1, characterized in that, The gap membrane further includes a second adhesive layer disposed on the side of the reflective structure layer opposite to the first substrate layer, and a second substrate layer disposed on the side of the second adhesive layer opposite to the reflective structure layer. The second substrate layer has an upper UV-resistant coating on at least one of the surfaces of the second adhesive layer and the second region, or the second substrate layer has UV-absorbing particles.

12. The photovoltaic module according to claim 11, characterized in that, The second substrate layer has an anti-UV coating on its surface opposite to the second adhesive layer, and at least a portion of the side surfaces of the second substrate layer have an anti-UV coating.

13. The photovoltaic module according to claim 11, characterized in that, The second region is provided with an anti-UV coating, and the width of the anti-UV coating is greater than the width of the gap membrane.

14. The photovoltaic module according to claim 2, 10, 12, or 13, characterized in that, The thickness of the UV-resistant coating is less than or equal to 30 μm; or, The thickness of the UV-resistant coating is less than or equal to 15 μm.

15. The photovoltaic module according to claim 1, characterized in that, The battery layer includes a plurality of spaced-apart battery cells, and the gap membrane portion is located above the battery cells and extends beyond the battery cells.

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