Packaging plate and photovoltaic module

Abstract

The utility model discloses a packaging plate and a photovoltaic assembly, which are applied to the photovoltaic field, and the packaging plate comprises a light-transmitting packaging plate main body and a composite film layer, the composite film layer is arranged in a preset area on the surface of the light-transmitting packaging plate main body; the preset area corresponds to a gap area between the battery pieces and corresponds to a peripheral edge area of the whole battery pieces; the composite film layer comprises a light-transmitting conductive film layer, a reflective layer and a light-transmitting insulating film layer which are stacked; the light-transmitting conductive film layer can be connected with a power supply module to realize heating. According to the utility model, the composite film layer is arranged in the preset area on the surface of the light-transmitting packaging plate main body, the light-transmitting conductive film layer in the composite film layer can be used for conducting electricity and heating to improve the temperature of the light-transmitting packaging plate main body, the phenomena of icing and snow accumulation on the surface of the light-transmitting packaging plate main body are avoided, and the photovoltaic module is further prevented from being damaged in a low-temperature environment; the light beams irradiated to the gaps are reflected to the surface of the battery piece by using the reflective layer in the composite film layer, so that the photoelectric conversion efficiency of the module is improved.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaics, and particularly to a packaging board and a photovoltaic module. Background Art

[0002] As a new type of renewable, clean and highly applicable energy, photovoltaic power generation has been widely applied worldwide, and its application scenarios are also becoming more and more extensive. When photovoltaic modules are applied in high-latitude or high-altitude regions, they will inevitably be affected by environmental factors such as low temperature and snowfall. Ice formation and snow accumulation will occur on the surface of the modules. On the one hand, it will cause partial or complete occlusion of the modules, greatly reducing the power generation performance of the modules and further leading to the phenomenon of hot spots in the modules; on the other hand, ice formation and snow accumulation will cause the modules to bear a large load, and when it exceeds the load-bearing capacity of the modules, it is easy to cause damage to the modules. At present, when there is ice or snow on the surface of the modules, manual cleaning is generally used, but this method is time-consuming, laborious and inefficient, and when the snow is accompanied by ice, the cleaning difficulty is extremely high.

[0003] Therefore, how to effectively avoid snow accumulation on the surface of the modules and improve the power generation efficiency and reliability of the modules in snowy and freezing weather has become an urgent problem to be solved in this field. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a packaging board and a photovoltaic module, which solve the problems in the prior art that when there is ice or snow on the surface of the module, the cleaning is time-consuming, laborious and inefficient, and when the snow is accompanied by ice, the cleaning difficulty is extremely high.

[0005] To solve the above technical problems, the utility model provides a packaging board and a photovoltaic module, including:

[0006] A light-transmitting packaging board body and a composite film layer;

[0007] The composite film layer is arranged in a preset area on the surface of the light-transmitting packaging board body; the preset area corresponds to the gap area between the battery cells and the four peripheral areas corresponding to the whole battery cells;

[0008] The composite film layer includes a light-transmitting conductive film layer, a reflective layer and a light-transmitting insulating film layer which are sequentially laminated in the preset area in a direction away from the light-transmitting packaging board body; the light-transmitting conductive film layer can be connected to a power supply module to realize heating.

[0009] Optionally, the reflective layer includes a light-transmitting carrier sub-film layer, a reflective sub-film layer with a microprism reflection structure and a light-transmitting bonding sub-film layer which are sequentially laminated in a direction from the light-transmitting conductive film layer to the light-transmitting insulating film layer;

[0010] On one side of the light-transmitting carrier sub-film layer facing the anti-photon sub-film layer, and / or on one side of the light-transmitting adhesive sub-film layer facing the anti-photon sub-film layer, a surface structure matching the micro-prism reflection structure is provided.

[0011] Optionally, the micro-prism reflection structure includes regularly arranged groove structures; the groove structures include at least one of a V-shaped groove structure, a semi-circular groove structure, and a semi-elliptical groove structure.

[0012] Optionally, the anti-photon sub-film layer is one of a metal reflection sub-film layer, an all-dielectric reflection sub-film layer, or a metal-dielectric reflection sub-film layer.

[0013] Optionally, the light-transmitting conductive film layer includes a metal thin film layer or an inorganic conductive thin film layer.

[0014] Optionally, the light-transmitting encapsulation plate body includes a light-transmitting glass plate.

[0015] Optionally, the light-transmitting conductive film layer includes a plurality of light-transmitting conductive sub-film layers;

[0016] Each of the light-transmitting conductive sub-film layers is respectively disposed in a part of the preset area, and each of the light-transmitting conductive sub-film layers can be connected to a power supply module to achieve independent heating.

[0017] The present invention also provides a photovoltaic module, including:

[0018] A front cover plate, a front encapsulation adhesive film layer, a photovoltaic cell layer, a back encapsulation adhesive film layer, and a back plate stacked in sequence;

[0019] The front cover plate is the encapsulation plate as described above.

[0020] Optionally, the light-transmitting conductive film layer in the encapsulation plate is connected to a power supply module through a switching control module.

[0021] Optionally, the front cover plate is the encapsulation plate;

[0022] Both the front cover plate and the back plate include light-transmitting glass plates;

[0023] The reflective layer in the encapsulation plate includes the light-transmitting carrier sub-film layer, the anti-photon sub-film layer, and the light-transmitting adhesive sub-film layer stacked in sequence along the direction from the light-transmitting conductive film layer to the light-transmitting insulating film layer; on one side of the light-transmitting carrier sub-film layer and the light-transmitting adhesive sub-film layer facing the anti-photon sub-film layer, surface structures matching the micro-prism reflection structure are both provided;

[0024] The anti-photon sub-film layer has a micro-prism reflection structure on both the side facing the light-transmitting carrier sub-film layer and the side facing the light-transmitting adhesive sub-film layer.

[0025] It can be seen that the encapsulation board provided by the present utility model includes a light-transmitting encapsulation board body and a composite film layer. The composite film layer is disposed in a preset area on the surface of the light-transmitting encapsulation board body. The preset area corresponds to the gap area between the battery cells and the four peripheral edge areas corresponding to the entire battery cells. The composite film layer includes a light-transmitting conductive film layer, a reflective layer, and a light-transmitting insulating film layer that are sequentially stacked in a direction away from the light-transmitting encapsulation board body in the preset area. The light-transmitting conductive film layer can be connected to a power supply module to achieve heating. By providing the composite film layer in the preset area on the surface of the light-transmitting encapsulation board body, the present utility model can increase the temperature of the light-transmitting encapsulation board body by using the light-transmitting conductive film layer in the composite film layer to conduct electricity and generate heat, avoid the phenomena of icing and snow accumulation on the surface of the light-transmitting encapsulation board body, and further avoid damaging the photovoltaic module in a low-temperature environment. At the same time, the reflective layer in the composite film layer reflects the light beam irradiated to the gap to the surface of the battery cell, and improves the photoelectric conversion efficiency of the prepared photovoltaic module.

[0026] In addition, the present utility model also provides a photovoltaic module, which also has the above beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0028] Figure 1 It is a schematic structural diagram of an encapsulation board provided by an embodiment of the present utility model;

[0029] Figure 2 It is a schematic structural diagram of a composite film layer in an encapsulation board provided by an embodiment of the present utility model;

[0030] Figure 3 It is a schematic structural diagram of a photovoltaic module provided by an embodiment of the present utility model;

[0031] Figures 1 to 3 Among them, the reference numerals are explained as follows:

[0032] 10 - light-transmitting encapsulation board body, 20 - composite film layer, 21 - light-transmitting conductive film layer, 221 - light-transmitting carrier sub-film layer, 222 - anti-light sub-film layer, 223 - light-transmitting adhesive sub-film layer, 23 - light-transmitting insulating film layer, 30 - front cover plate, 40 - front encapsulation adhesive film layer, 50 - photovoltaic cell layer, 51 - battery cell, 60 - back encapsulation adhesive film layer, 70 - back plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part rather than all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0034] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of a packaging board provided by an embodiment of the present utility model. The packaging board may include:

[0035] a light-transmitting packaging board body 10 and a composite film layer 20;

[0036] The composite film layer 20 is disposed in a preset area on the surface of the light-transmitting packaging board body 10; the preset area corresponds to the gap area between the battery cells and the four peripheral edge areas corresponding to the overall battery cells;

[0037] The composite film layer 20 includes, in the preset area, a light-transmitting conductive film layer 21, a reflective layer, and a light-transmitting insulating film layer 23 that are sequentially stacked in a direction away from the light-transmitting packaging board body 10; the light-transmitting conductive film layer 21 can be connected to a power supply module to achieve heating.

[0038] It should be noted that in this embodiment, the composite film layer 20 can refer to Figure 2 , Figure 2A schematic structural diagram of a composite film layer in a packaging board provided by an embodiment of the present invention. In this embodiment, the packaging board is generally the front cover for packaging the battery cells in a photovoltaic module. Among them, the light-transmitting packaging board body 10 can be set to be the same as a conventional front cover, but the specific structure is not limited in this embodiment. In this embodiment, the composite film layer 20 is arranged in a preset area on the surface of the light-transmitting packaging board body 10, and this preset area is the gap area between adjacent battery cells and the four peripheral areas corresponding to the whole battery cell during the preparation of the photovoltaic module, that is, the preset area is the area other than the battery cells on the surface of the light-transmitting packaging board body 10, so as to prepare the composite film layer 20 by using the gap area between adjacent battery cells and the four peripheral areas corresponding to the whole battery cell, and avoid blocking the battery cells. In this embodiment, the composite film layer 20 is set to be a composite film layer 20 formed by sequentially laminating a transparent conductive film layer 21, a reflective layer, and a transparent insulating film layer 23 outward along the surface of the light-transmitting packaging board body 10. The transparent conductive film layer 21 conducts electricity and generates heat to increase the temperature of the light-transmitting packaging board body 10, avoid ice formation and snow accumulation on the surface of the light-transmitting packaging board body 10, and further avoid affecting the photoelectric conversion efficiency and damaging the light-transmitting packaging board body 10. The finally formed composite film layer 20 can be set to be distributed in a grid pattern. The reflective layer in the composite film layer 20 is used to reflect the light beam irradiated to the gap between the corresponding battery cells back to the surface of the battery cell. It should be further noted that here, using the reflective layer to reflect the light beam back to the surface of the battery cell should be partial return, that is, there is a loss in the process of the light beam being reflected by the reflective layer and finally irradiating to the surface of the battery cell. In a possible implementation manner, the light beam reflected by the reflective layer reaches the surface of the light-transmitting packaging board body 10, and part of it is reflected by the surface of the light-transmitting packaging board body 10 and irradiates to the surface of the battery cell to improve the photoelectric conversion efficiency of the battery in the photovoltaic module. In this embodiment, the light-transmitting packaging board body 10 can be provided with a concave structure or a convex structure in the preset area to arrange the composite film layer 20 in the concave structure or on the surface of the convex structure for easy preparation, or other limiting structures can also be provided in the preset area of the light-transmitting packaging board body 10 to facilitate arranging the composite film layer 20 in this preset area. In this embodiment, the front cover is generally defined as the cover that is set upward to receive sunlight.

[0039] In addition, in this embodiment, the light-transmitting insulating film layer 23 is provided to prevent damage to the components caused by the conductive connection between the light-transmitting conductive film layer 21 and the battery cell after the photovoltaic module is fabricated. In this embodiment, the light-transmitting conductive film layer 21 may include a conductive connection end connected to the power supply module, through which the power supply module supplies power to the light-transmitting conductive film layer 21, thereby enabling the light-transmitting conductive film layer to generate heat, increasing the temperature of the light-transmitting encapsulation plate body 10, and avoiding phenomena such as snow accumulation and icing. In this embodiment, the specific structure of the reflective layer in the composite film layer 20 can be set as required, and this embodiment does not limit the light transmittance of the light-transmitting encapsulation plate body 10, the light-transmitting conductive film layer 21, and the light-transmitting insulating film layer 23. However, it should be noted that to ensure the photoelectric conversion efficiency of the fabricated photovoltaic module, a relatively large light transmittance is required, and it is generally set as a transparent structure. In addition, the resistance value of the light-transmitting conductive film layer 21 in this embodiment is set as required. For the same area, the higher the resistance value, the higher the heat generation efficiency.

[0040] Further, to ensure the light reflection effect of the reflective layer, the above-mentioned reflective layer may include a light-transmitting carrier sub-film layer 221, a reflective sub-film layer 222 with a microprism reflection structure, and a light-transmitting bonding sub-film layer 223, which are sequentially stacked in the direction from the light-transmitting conductive film layer 21 to the light-transmitting insulating film layer 23;

[0041] On one side of the light-transmitting carrier sub-film layer 221 adjacent to the reflective sub-film layer 222, and / or on one side of the light-transmitting bonding sub-film layer 223 adjacent to the reflective sub-film layer 222, a surface structure matching the microprism reflection structure is provided.

[0042] It should be noted that in this embodiment, on one side of the light-transmitting carrier sub-film layer 221 in the reflective layer adjacent to the reflective sub-film layer 222, and / or on one side of the light-transmitting bonding sub-film layer 223 adjacent to the reflective sub-film layer 222, a surface structure matching the microprism reflection structure is provided, that is, in this embodiment, the reflective sub-film layer 222 is correspondingly and fittingly combined with the light-transmitting carrier sub-film layer 221 and the light-transmitting bonding sub-film layer 223, so that microprism light reflection structures for standardizing the reflected light beams are formed on both sides of the reflective sub-film layer 222.

[0043] Further, to ensure the light reflection effect of the microprism light reflection structure on the light beam, the above-mentioned microprism reflection structure may include regularly arranged groove structures; the groove structures may include at least one of a V-shaped groove structure, a semi-circular groove structure, and a semi-elliptical groove structure.

[0044] It should be noted that in this embodiment, the microprism light reflection structure is set as at least one of a V-shaped groove structure, a semi-circular groove structure, and a semi-elliptical groove structure to improve the efficiency of the light beam reflected by the reflective layer irradiating the surface of the battery cell.

[0045] Further, in order to ensure the light reflection efficiency of the anti-photon film layer 222, the anti-photon film layer 222 may be set as one of a metal reflection sub-film layer, an all-dielectric reflection sub-film layer, or a metal-dielectric reflection sub-film layer.

[0046] In this embodiment, setting the anti-photon film layer 222 as one of a metal reflection sub-film layer, an all-dielectric reflection sub-film layer, or a metal-dielectric reflection sub-film layer can ensure the light reflection effect of the anti-photon film layer 222 and improve the reflectivity.

[0047] Further, in order to ensure that the transparent conductive film layer 21 generates heat to increase the temperature of the transparent encapsulation plate body 10, and at the same time avoid the stress in the photovoltaic module prepared by the encapsulation plate from affecting the structural stability, the transparent conductive film layer 21 may include a metal thin film layer or an inorganic conductive thin film layer.

[0048] It should be noted that in this embodiment, setting the transparent conductive film layer 21 to include a metal thin film layer or an inorganic conductive thin film layer can, while ensuring the structural stability, realize the heat generation of the transparent conductive film layer 21 when energized, and avoid the phenomenon of snow accumulation and icing on the surface of the encapsulation plate. Specifically, the transparent conductive film layer 21 may be set as a transparent conductive film layer 21 prepared from one or more of copper, aluminum, chromium, tin oxide, indium oxide, zinc oxide, cadmium oxide, titanium dioxide, indium tin oxide, aluminum-doped zinc oxide, carbon nanotubes, graphene, and the above transparent conductive film layer 21 can be prepared by chemical vapor deposition, liquid phase generation, diffusion, electroplating, vacuum thermal evaporation, DC sputtering, magnetron sputtering, RF sputtering, or pulsed laser deposition.

[0049] Further, in a feasible implementation manner, the transparent encapsulation plate body 10 may include a transparent glass plate.

[0050] It should be noted that in this embodiment, setting the transparent encapsulation plate body 10 to include a transparent glass plate can, while ensuring the encapsulation effect, improve the structural strength and adaptability of the transparent encapsulation plate body 10.

[0051] Further, in order to ensure the flexibility of the transparent conductive film layer 21 for the heating area in the transparent encapsulation plate body 10, the transparent conductive film layer 21 may include a plurality of transparent conductive sub-film layers;

[0052] Each transparent conductive sub-film layer is respectively disposed in a partial preset area, and each transparent conductive sub-film layer can be connected to the power supply module to realize independent heating.

[0053] It should be noted that in this embodiment, the light-transmitting conductive film layer 21 is set to include a plurality of light-transmitting conductive sub-film layers, each light-transmitting conductive sub-film layer is respectively disposed in a part of the preset area, and it can be set that each light-transmitting conductive sub-film layer includes a conductive connection end independently connected to the power supply module, that is, the preset area is divided into a plurality of sub-areas, each sub-area corresponds to a light-transmitting conductive sub-film layer, and each light-transmitting conductive sub-film layer is independently connected to the power supply module, so as to be able to separately control the energization state of each light-transmitting conductive sub-film layer and ensure the separate control of the temperature of each sub-area in the preset area. For example, when there is an inclined surface in the prepared photovoltaic module, the surface of the encapsulation board is correspondingly inclined, and at this time, snow accumulation and icing are likely to occur at the lower edge. Therefore, it is not necessary to heat the entire encapsulation board, and only need to control the light-transmitting conductive sub-film layer under the encapsulation board in the snow accumulation and icing area to be energized and generate heat. Further, in order to improve the flexibility of using the light-transmitting conductive film layer 21 to heat the light-transmitting encapsulation board, it can be set that the conductive connection end of the light-transmitting conductive film layer 21 is connected to the power supply module through a voltage regulation module to provide a device capable of adjusting the voltage input to the conductive connection end of the light-transmitting conductive film layer 21.

[0054] The encapsulation board applying the embodiment of the present invention includes a light-transmitting encapsulation board main body 10 and a composite film layer 20. The composite film layer 20 is disposed in a preset area on the surface of the light-transmitting encapsulation board main body 10. The preset area corresponds to the gap area between the battery cells and the four peripheral edge areas corresponding to the whole battery cells. The composite film layer 20 includes, in the preset area, a light-transmitting conductive film layer 21, a reflective layer, and a light-transmitting insulating film layer 23 that are sequentially stacked in a direction away from the light-transmitting encapsulation board main body 10. The light-transmitting conductive film layer 21 can be connected to a power supply module to generate heat. By setting the composite film layer 20 in the preset area on the surface of the light-transmitting encapsulation board main body 10, the present invention can use the light-transmitting conductive film layer 21 in the composite film layer 20 to conduct electricity and generate heat to increase the temperature of the light-transmitting encapsulation board main body 10, avoid the phenomenon of icing and snow accumulation on the surface of the light-transmitting encapsulation board main body 10, and further avoid damaging the photovoltaic module in a low-temperature environment. At the same time, the reflective layer in the composite film layer 20 is used to reflect the light beam irradiated to the gap to the surface of the battery cell, and at the same time improve the photoelectric conversion efficiency of the prepared photovoltaic module.

[0055] In addition, for the present utility model, one side of the light-transmitting carrier sub-film layer 221 in the reflective layer facing the anti-reflection sub-film layer 222, and / or one side of the light-transmitting adhesive sub-film layer 223 facing the anti-reflection sub-film layer 222, is set to a surface structure matching the micro-prism reflection structure, so that the anti-reflection sub-film layer 222 forms a micro-prism reflective structure for standardizing the reflected light beam, ensuring the reflective effect of the reflective layer; the micro-prism reflective structure is set to at least one of a V-shaped groove structure, a semi-circular groove structure, and a semi-elliptical groove structure, improving the efficiency of the light beam reflected by the reflective layer irradiating on the surface of the battery cell; the anti-reflection sub-film layer 222 is set to be one of a metal reflective sub-film layer, a fully dielectric reflective sub-film layer, or a metal-dielectric reflective sub-film layer, which can ensure the reflective effect of the anti-reflection sub-film layer 222 and improve the reflectivity; the light-transmitting conductive film layer 21 is set to include a metal thin film layer or an inorganic conductive thin film layer, while ensuring the structural stability, realizing the use of the light-transmitting conductive film layer 21 to generate heat when powered on, avoiding the phenomenon of snow accumulation and icing on the surface of the encapsulation board; the light-transmitting encapsulation board main body 10 is set to include a light-transmitting glass plate, while ensuring the encapsulation effect, improving the structural strength and adaptability of the light-transmitting encapsulation board main body 10; the light-transmitting conductive film layer 21 is set to include multiple light-transmitting conductive sub-film layers, each light-transmitting conductive sub-film layer is respectively set in a part of the preset area, and each light-transmitting conductive sub-film layer can be connected to the power supply module to realize independent heating, capable of independently controlling the energization state of each light-transmitting conductive sub-film layer, ensuring the flexibility of the light-transmitting conductive film layer 21 for the heating area in the light-transmitting encapsulation board main body 10.

[0056] The following introduces the photovoltaic module provided by the embodiment of the present utility model. The photovoltaic module described below can be correspondingly referred to the encapsulation board described above.

[0057] Specifically, please refer to Figure 3 , Figure 3 which is a schematic structural diagram of a photovoltaic module provided by an embodiment of the present utility model, and may include:

[0058] A front cover plate 30, a front encapsulation adhesive film layer 40, a photovoltaic cell layer 50, a back encapsulation adhesive film layer 60, and a back plate 70 that are sequentially stacked;

[0059] The front cover plate 30 is the encapsulation board as described above.

[0060] It should be noted that in this embodiment, the front cover plate 30 is set as the above-mentioned encapsulation plate, that is, only the front cover plate 30 can be set as the above-mentioned encapsulation plate, or further, both the front cover plate 30 and the back plate 70 can be set as the above-mentioned encapsulation plate to improve the snow and ice prevention effect of the component. In this embodiment, the front cover plate 30 can be set as the above-mentioned encapsulation plate, and the back plate 70 can be set as a back plate 70 made of polymer material. The composite film layer 20 in the encapsulation plate is arranged on the side of the encapsulation plate facing the photovoltaic cell layer 50. At this time, when there is snow, ice or water on the upper surface of the front cover plate 30, the power supply module can be started to supply power to the composite film layer 20. The heat generated by the transparent conductive thin film in the composite film layer 20 melts the snow and ice on the front cover plate 30 into water and quickly dries it, so that the photovoltaic module quickly resumes its power generation function. Since the snow on the surface of the photovoltaic module can be removed in time, the influence of snow load on the module is prevented, and the reliability of the module is improved. Secondly, since the composite film layer 20 is distributed corresponding to the gaps between the battery cells 51, the reflective layer of the composite film layer 20 has a high reflectivity to the light incident into the gaps between the battery cells 51. Its front surface reflects the light transmitted through the transparent conductive film layer, and its back surface reflects the light transmitted through the transparent insulating layer. And since the reflective layer can be set as a regularly arranged groove structure, most of the light reflected by its front and back surfaces reaches the front and back surfaces of the battery cells 51 respectively through total reflection and is absorbed and utilized, increasing the light energy utilization rate of the component and improving the comprehensive output power and conversion efficiency of the component.

[0061] Further, in order to ensure that the power generation and heat generation of the transparent conductive film layer 21 in the encapsulation plate are controllable, the transparent conductive film layer 21 in the above-mentioned encapsulation plate can be set to be connected to the power supply module through a on-off control module.

[0062] It should be noted that in this embodiment, the transparent conductive film layer 21 is set to be connected to the power supply module through an on-off control module, that is, the on-off of the conductive film layer can be controlled by using the on-off control module, thereby improving the flexible controllability of the transparent conductive film layer 21. It should be noted that the on-off control method of the on-off control module in this embodiment is not limited in this embodiment. This embodiment only provides a module that can execute circuit on-off control, and the specific control method can be set according to actual needs.

[0063] Further, in order to reduce the manufacturing cost of the photovoltaic module, the above-mentioned front cover plate 30 can be set as an encapsulation plate;

[0064] Both the front cover plate 30 and the back plate 70 include transparent glass plates;

[0065] The reflective layer in the encapsulation board includes a light-transmitting carrier sub-layer, a reflective sub-layer, and a light-transmitting bonding sub-layer that are sequentially stacked in the direction from the light-transmitting conductive film layer to the light-transmitting insulating film layer; on the sides of the light-transmitting carrier sub-layer and the light-transmitting bonding sub-layer facing the reflective sub-layer, surface structures matching the microprism reflection structure are provided.

[0066] The reflective sub-layer has microprism reflection structures on both the side facing the light-transmitting carrier sub-layer and the side facing the light-transmitting bonding sub-layer.

[0067] It should be noted that in this embodiment, the reflective sub-layer is provided with microprism reflection structures on both the side facing the light-transmitting carrier sub-layer and the side facing the light-transmitting bonding sub-layer. The front cover plate 30 is an encapsulation board composed of a light-transmitting glass plate and a composite film layer 20, and the back plate 70 is a light-transmitting glass plate. That is, only the reflective sub-layer with microprism reflection structures formed on both sides is provided in the front cover plate 30, while the back plate 70 is set as a conventional light-transmitting glass plate, which reduces the preparation cost and at the same time ensures that the light beams incident on the surface of the reflective layer from the front and back are reflected to the surface of the corresponding solar cell 51.

[0068] Applying the photovoltaic module provided by the embodiment of the present invention, which includes a front cover plate 30, a front encapsulation adhesive film layer 40, a photovoltaic cell layer 50, a back encapsulation adhesive film layer 60, and a back plate 70 that are sequentially stacked, and the front cover plate 30 is the encapsulation board as described above. By setting the composite film layer 20 in the preset area on the surface of the light-transmitting encapsulation board main body, the present invention can use the light-transmitting conductive film layer in the composite film layer 20 to conduct electricity and generate heat to increase the temperature of the light-transmitting encapsulation board main body, avoid the phenomenon of icing and snow accumulation on the surface of the light-transmitting encapsulation board main body, and thus avoid damaging the photovoltaic module in a low-temperature environment. At the same time, the reflective layer in the composite film layer 20 is used to reflect the light beam irradiated to the gap to the surface of the solar cell 51, and at the same time improve the photoelectric conversion efficiency of the prepared photovoltaic module.

[0069] In addition, in the embodiment of the present invention, the light-transmitting conductive film layer 21 in the encapsulation board is connected to the power supply module through a switching control module, that is, the switching of the conductive film layer can be controlled by the switching control module, thereby improving the flexible controllability of the light-transmitting conductive film layer 21; by setting the reflective sub-layer to have microprism reflection structures on both the side facing the light-transmitting carrier sub-layer and the side facing the light-transmitting bonding sub-layer, and setting both the front cover plate 30 and the back plate 70 to include light-transmitting glass plates, and at the same time setting the front cover plate 30 as an encapsulation board, the preparation cost is reduced and the photoelectric conversion efficiency of the solar cell 51 is improved.

[0070] In a feasible embodiment, the above photovoltaic module may specifically include the following structures:

[0071] A front cover plate, a front encapsulation adhesive film layer, a photovoltaic cell layer, a back encapsulation adhesive film layer, and a back plate that are sequentially stacked; both the front cover plate and the back plate are encapsulation plates, and both the front cover plate and the back plate include light-transmitting glass plates;

[0072] The encapsulation plate includes a light-transmitting encapsulation plate body and a composite film layer; the composite film layer is provided in a preset area on the surface of the light-transmitting encapsulation plate body; the preset area corresponds to the gap area between the battery cells and the four peripheral edge areas corresponding to the entire battery cells; the composite film layer includes a light-transmitting conductive film layer, a reflective layer, and a light-transmitting insulating film layer that are sequentially stacked in a direction away from the light-transmitting encapsulation plate body in the preset area; the light-transmitting conductive film layer is connected to the power supply module through a switching control module;

[0073] The reflective layer in the encapsulation plate includes a light-transmitting carrier sub-film layer, a reflective sub-film layer, and a light-transmitting bonding sub-film layer that are sequentially stacked in the direction from the light-transmitting conductive film layer to the light-transmitting insulating film layer; on the sides of the light-transmitting carrier sub-film layer and the light-transmitting bonding sub-film layer facing the reflective sub-film layer, surface structures matching the microprism reflection structure are provided; the reflective sub-film layer is a reflective sub-film layer having a microprism reflection structure on both the side facing the light-transmitting carrier sub-film layer and the side facing the light-transmitting bonding sub-film layer; the microprism reflection structure includes regularly arranged groove structures; the groove structures include at least one of a V-shaped groove structure, a semi-circular groove structure, and a semi-elliptical groove structure;

[0074] The reflective sub-film layer is one of a metal reflective sub-film layer, an all-dielectric reflective sub-film layer, or a metal-dielectric reflective sub-film layer; the light-transmitting conductive film layer includes a metal thin film layer or an inorganic conductive thin film layer;

[0075] The light-transmitting conductive film layer includes a plurality of light-transmitting conductive sub-film layers; each light-transmitting conductive sub-film layer is respectively provided in a part of the preset area, and each light-transmitting conductive sub-film layer can be connected to the power supply module to achieve independent heating.

[0076] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts between the various embodiments, reference can be made to each other.

[0077] In addition, it should be noted that in this article, relationships such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant are intended to cover non-exclusive inclusion.

[0078] The above has introduced in detail a packaging board and a photovoltaic module provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the structure and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A packaging board, characterized in that: include: Light-transmitting packaging board main body and composite film layer; The composite film layer is arranged in a preset area on the surface of the light-transmitting packaging plate body; The preset area corresponds to the gap area between the battery cells and the edge area around the entire battery cell; The composite film layer includes a light-transmitting conductive film layer, a light-reflecting layer and a light-transmitting insulating film layer which are sequentially stacked in the preset area in a direction away from the light-transmitting packaging board body; the light-transmitting conductive film layer can be connected to a power supply module to achieve heat generation.

2. The packaging board according to claim 1, characterized in that: The reflective layer comprises a light-transmitting carrier sub-film layer, a light-reflecting sub-film layer having a micro-prism reflective structure, and a light-transmitting bonding sub-film layer, which are sequentially stacked in a direction from the light-transmitting conductive film layer to the light-transmitting insulating film layer; The side of the light-transmitting carrier sub-film layer close to the light-reflecting sub-film layer, and / or the side of the light-transmitting bonding sub-film layer close to the light-reflecting sub-film layer, is provided with a surface structure matching the micro-prismatic reflective structure.

3. The packaging board according to claim 2, characterized in that: The micro-prismatic reflective structure comprises a regularly arranged groove structure; the groove structure comprises at least one of a V-shaped groove structure, a semicircular groove structure and a semi-elliptical groove structure.

4. The packaging board according to claim 2, characterized in that: The photoreflective sub-film layer is one of a metal reflective sub-film layer, an all-dielectric reflective sub-film layer or a metal-dielectric reflective sub-film layer.

5. The packaging board according to claim 1, characterized in that: The light-transmitting conductive film layer includes a metal film layer or an inorganic conductive film layer.

6. The packaging board according to claim 1, characterized in that: The light-transmitting packaging plate body comprises a light-transmitting glass plate.

7. The packaging board according to claim 1, characterized in that: The light-transmitting conductive film layer comprises a plurality of light-transmitting conductive sub-film layers; Each of the light-transmitting conductive sub-film layers is respectively arranged in a portion of the preset areas, and each of the light-transmitting conductive sub-film layers can be connected to a power supply module to achieve independent heating.

8. A photovoltaic module, characterized in that: include: A front cover plate, a front encapsulation film layer, a photovoltaic cell layer, a back encapsulation film layer and a back plate are stacked in sequence; The front cover plate is a packaging plate as described in any one of claims 1 to 7.

9. The photovoltaic module according to claim 8, characterized in that: The light-transmitting conductive film layer in the packaging board is connected to the power supply module through the on-off control module.

10. The photovoltaic module according to claim 9, characterized in that: The front cover plate is the packaging plate; The front cover plate and the back plate both include light-transmitting glass plates; The reflective layer in the packaging board includes the light-transmitting carrier sub-film layer, the light-reflecting sub-film layer, and the light-transmitting bonding sub-film layer, which are stacked in sequence along the direction from the light-transmitting conductive film layer to the light-transmitting insulating film layer; the light-transmitting carrier sub-film layer and the light-transmitting bonding sub-film layer are both provided with a surface structure matching the micro-prismatic reflective structure on one side close to the light-reflecting sub-film layer; The photoreflective sub-film layer is a photoreflective sub-film layer having the micro-prismatic reflective structure on both the side close to the light-transmitting carrier sub-film layer and the side close to the light-transmitting bonding sub-film layer.

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