Photovoltaic module

Abstract

The utility model discloses a photovoltaic assembly. The photovoltaic module comprises a panel, a back plate, a battery piece layer and a first packaging adhesive film layer, the back plate and the panel are arranged in a stacked mode, the battery piece layer is located between the panel and the back plate, the first packaging adhesive film layer is located between the battery piece layer and the panel, a color layer is arranged between the panel and the first packaging adhesive film layer, the color layer is a light-transmitting layer, and the light-transmitting layer is located between the panel and the first packaging adhesive film layer. A concave-convex structure is arranged on the side, away from the first packaging adhesive film layer, of the panel. Therefore, the concave-convex structure can reduce the reflection of solar rays on the panel, thereby improving the incident quantity of the solar rays, increasing the generating capacity of solar energy and reducing the light pollution phenomenon of a building, and in addition, the color layer can increase the color brightness of the panel, thereby improving the aesthetic property of the photovoltaic module.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic technology field especially relates to a photovoltaic module. BACKGROUND

[0002] With the energy shortage, the serious problem of climate emission highlights, the world more and more attention clean, pollution-free renewable energy, solar energy is inexhaustible, inexhaustible green energy. At present, the application field of photovoltaic power generation is extensive, and solar energy and building integrated design (BIPV) gradually become the trend, and residential roof is the main application area of distributed photovoltaic. In the related art, the reflectivity of the photovoltaic module is high, which can cause a large light pollution phenomenon, and the photovoltaic module has poor appearance. SUMMARY

[0003] The utility model provides a photovoltaic module.

[0004] The photovoltaic module of the present application embodiment includes a panel, a back sheet, a cell sheet layer and a first encapsulant film layer, the back sheet is laminated with the panel, the cell sheet layer is located between the panel and the back sheet, the first encapsulant film layer is located between the cell sheet layer and the panel, a color layer is provided between the panel and the first encapsulant film layer, the color layer is a light-transmitting layer, and the panel is provided with a concave-convex structure on the side away from the first encapsulant film layer.

[0005] In this way, the concave-convex structure can reduce the reflection of sunlight on the panel, thereby increasing the amount of incident sunlight and the amount of solar power generation, reducing the light pollution phenomenon of buildings, and in addition, the color layer can increase the color brightness of the panel, thereby improving the appearance of the photovoltaic module.

[0006] In some embodiments, the concave-convex structure is a frosted concave-convex structure.

[0007] In some embodiments, the light transmittance of the panel is greater than that of the color layer.

[0008] In some embodiments, the panel is one of a PET plate, a CPC plate and an HPC plate.

[0009] In some embodiments, the light transmittance of the back sheet is less than that of the color layer.

[0010] In some embodiments, the thickness of the panel is 0.18-0.3 mm; and / or, the thickness of the back sheet is 0.18-0.4 mm.

[0011] In some embodiments, the cell sheet layer includes a plurality of cell strings, the plurality of cell strings are connected in series, each cell string includes a plurality of cell sheets, and all the cell sheets in each cell string are connected in series by a welding strip.

[0012] In some embodiments, the solder strip includes a plurality of first solder segments and at least one second solder segment, the first solder segments are connected with corresponding one of the battery pieces, the second solder segment connects two adjacent first solder segments in the first direction, the second solder segment is located between the two adjacent battery pieces and across the lamination area of the two adjacent battery pieces, and the second solder segment is in a flat shape.

[0013] In some embodiments, the photovoltaic module includes a second encapsulation film layer, the second encapsulation film layer is located between the battery piece layer and the back plate.

[0014] In some embodiments, the thickness of the first encapsulation film layer and / or the second encapsulation film layer is 0.3-0.7mm.

[0015] Additional aspects and advantages of the present application will be apparent from the following description of the application, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and be more readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0017] Figure 1 is a schematic diagram of a photovoltaic module according to an embodiment of the present application;

[0018] Figure 2 is a schematic diagram of a photovoltaic module according to an embodiment of the present application;

[0019] Figure 3 is a schematic diagram of a photovoltaic module according to an embodiment of the present application;

[0020] Figure 4 is a schematic diagram of a photovoltaic module according to an embodiment of the present application;

[0021] Figure 5 is a schematic diagram of a photovoltaic module according to an embodiment of the present application;

[0022] Figure 6 is a schematic diagram of a photovoltaic module according to an embodiment of the present application;

[0023] BRIEF DESCRIPTION OF DRAWINGS DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are merely intended to explain the present application, and are not to be understood as limiting the present application.

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0026] In the description of the present application, it should be noted that, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In the present application, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical direction of the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical direction of the first feature below and obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0028] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. For the sake of simplicity, the description below refers to specific examples in which features can be present in some embodiments but not in others, which are disclosed as discrete combinations within separate examples. Such examples, however, are not discrete. Indeed, the different features of the different embodiments can be present together in a single embodiment and the same or similar features can be arranged in different examples. Furthermore, specific examples can be described in terms of sequences of actions to be performed by, for example, elements of a computing device. It will be recognized that such descriptions are used provided for the sake of convenience and to aid in the understanding of the present application and that such processes can be performed in other sequences or in an interwoven manner. Additionally, descriptions of processes are often presented in terms of individual actions that can be performed or operations that can be executed. Such individual actions and operations can not have to be performed in the order given; certain of the actions can have to be performed or the operations can have to be executed in a different order, including sequentially, in parallel, or in some other order. Furthermore, various actions and operations can have to be combined into fewer actions and operations or separated into additional actions and operations. Furthermore, the description herein of any apparatus is intended to encompass both an individual apparatus and two or more apparatuses that can work together to perform the described actions and operations.

[0029] Referring to Figure 1 and Figure 2 The photovoltaic module 100 of the embodiment of the present application comprises a panel 10, a back panel 20, a cell sheet layer 30, and a first encapsulation adhesive film layer 40. The back panel 20 is arranged in layers with the panel 10, the cell sheet layer 30 is located between the panel 10 and the back panel 20, and the first encapsulation adhesive film layer 40 is located between the cell sheet layer 30 and the panel 10. A color layer 50 is arranged between the panel 10 and the first encapsulation adhesive film layer 40. The color layer 50 is a light-transmitting layer. The panel 10 is provided with a concave-convex structure 60 on the side facing away from the first encapsulation adhesive film layer 40.

[0030] In this way, the concave-convex structure 60 can reduce the reflection of sunlight on the panel 10, thereby increasing the amount of incident sunlight, increasing the amount of solar power generation, and reducing the phenomenon of building light pollution. In addition, the color layer 50 can increase the color brightness of the panel 10, thereby improving the aesthetic appearance of the photovoltaic module 100.

[0031] Specifically, the photovoltaic module 100 refers to the smallest indivisible photovoltaic cell combination device that can provide direct current output independently after encapsulation and internal connection, and is a device capable of converting light energy into electrical energy. There are many materials that can produce photovoltaic effects, such as monocrystalline silicon, polycrystalline silicon, amorphous silicon, gallium arsenide, and selenium indium copper, etc. When light shines on the surface of the photovoltaic module 100, a part of the photons is absorbed by the silicon material, and the energy of the photons is transferred to the silicon atoms, causing the electrons to jump and become free electrons, which are accumulated on both sides of the P-N junction to form a potential difference. When the external circuit is connected, under the action of the voltage, current will flow through the external circuit to generate a certain output power.

[0032] The cell sheet layer 30 can receive light and convert solar energy into electrical energy. The panel 10 is located on the front side of the cell sheet layer 30, and the back panel 20 is located on the back side of the cell sheet layer 30. The front side of the cell sheet layer 30 refers to the main light-receiving surface of the cell sheet layer 30, and the back side is the surface opposite to the front side of the cell sheet layer 30.

[0033] The panel 10 and the backboard 20 constitute the outermost layer of the photovoltaic module 100, which can seal, insulate and protect the cell sheet layer 30, thereby improving the mechanical properties of the photovoltaic module 100. The panel 10 and the backboard 20 can protect the cell sheet layer 30 from damage caused by climate change, such as high temperature, low temperature, rain or hail, etc. to the cell sheet layer 30, and can also protect the cell sheet layer 30 from damage caused by collision during transportation, thereby effectively improving the ability of the photovoltaic module 100 to cope with harsh environments.

[0034] The color layer 50 can be formed on the surface of the panel 10 close to the first encapsulating adhesive film layer 40 by coating, silk printing, digital printing and other processes. The concave-convex structure 60 can be an irregular concave-convex structure or a regular concave-convex structure. The cell sheet layer 30 and the panel 10 can be connected and fixed by the first encapsulating adhesive film layer 40, realizing the lamination and packaging of the cell sheet layer 30 and the panel 10, and forming a stable and reliable structure. In addition, the first encapsulating adhesive film layer 40 can play a buffering role between the panel 10 and the cell sheet layer 30 to prevent breakage caused by lamination. The first encapsulating adhesive film layer 40 can be made of one of EVA or POE materials or EPE materials.

[0035] In some embodiments, the concave-convex structure 60 is a frosted concave-convex structure 60.

[0036] The frosted concave-convex structure 60 makes the panel 10 form a fine concave-convex surface structure, further improves the amount of sunlight, increases the power generation of solar energy, reduces the reflection of sunlight, and reduces the phenomenon of building light pollution.

[0037] Specifically, the frosted concave-convex structure 60 can be formed on the surface of the panel 10 away from the first encapsulating adhesive film layer 40 by a frosted process.

[0038] In some embodiments, the light transmittance of the panel 10 is greater than the light transmittance of the color layer 50.

[0039] In this way, the sunlight can pass through the panel 10 to reach the color layer 50, and the color layer 50 can normally receive light from the panel 10, reducing the influence on the power generation effect of the cell sheet layer 30.

[0040] Specifically, the panel 10 can be made of a light-transmitting material, such as glass or a high-molecular material such as polycarbonate. When the light transmittance of the color layer 50 is 80%, the light transmittance of the panel 10 can be 85%, 90%, 95%, etc.

[0041] In some embodiments, the panel 10 is one of a PET plate, a CPC plate and an HPC plate.

[0042] Therefore, the panel 10 has good light transmittance, and the color layer 50 can normally receive light from the panel 10. In addition, the panel 10 is made of a flexible polymer material, which can reduce the weight of the panel 10 and can be bent into different shapes to meet different design requirements. In addition, the selection of the battery sheet layer 30 can improve the power generation efficiency.

[0043] Specifically, the panel 10 can be a flat surface or a curved surface. The panel 10 can be cut into a suitable shape and size by using off-line cutting machines in the workshop according to the purchased panel 10 product materials.

[0044] In some embodiments, the light transmittance of the back plate 20 is less than that of the color layer 50.

[0045] Therefore, the transmittance of the back plate 20 to the sunlight from the color layer 50 can be reduced, thereby improving the utilization rate of the sunlight.

[0046] Specifically, the back plate 20 can be a dark back plate 20, for example, the back plate 20 is a black back plate 20. The back plate 20 can be black as a whole, or the side of the back plate 20 facing the battery sheet layer 30 can be black. When the light transmittance of the color layer 50 is 80%, the light transmittance of the back plate 20 can be 65%, 70%, 75%, etc.

[0047] In some embodiments, the thickness of the panel 10 is 0.18-0.3 mm; and / or, the thickness of the back plate 20 is 0.18-0.4 mm.

[0048] Therefore, by limiting the thickness of the panel 10 and the back plate 20 within the above range, the strength of the panel 10 and the back plate 20 can meet the requirements and can meet the protection requirements of the battery sheet layer 30.

[0049] Specifically, the thickness of the panel 10 can be a point value of any one of 0.18-0.3 mm or a range value between any two of them. For example, the thickness of the panel 10 is 0.18 mm, 0.2 mm, 0.22 mm, 0.24 mm, 0.26 mm, 0.28 mm, or 0.3 mm.

[0050] The thickness of the back plate 20 can be a point value of any one of 0.18-0.4 mm or a range value between any two of them. For example, the thickness of the back plate 20 is 0.18 mm, 0.2 mm, 0.22 mm, 0.24 mm, 0.26 mm, 0.28 mm, 0.3 mm, 0.32 mm, 0.34 mm, 0.36 mm, 0.38 mm, or 0.4 mm.

[0051] The thickness of the face plate 10 and the back plate 20 can be the same or different. For example, the thickness of the face plate 10 and the back plate 20 is 0.24 mm, or the thickness of the face plate 10 is 0.27 mm and the thickness of the back plate 20 is 0.32 mm.

[0052] Referring to Figure 3 and Figure 4 In some embodiments, the cell sheet layer 30 includes a plurality of cell strings 31 connected in series, each cell string 31 including a plurality of cell sheets 32, and all cell sheets 32 in each cell string 31 are connected in series by a solder strip 33.

[0053] In this way, the plurality of cell sheets 32 connected in series can improve the efficiency of the cell sheet layer 30, thereby improving the utilization rate of solar energy.

[0054] Specifically, the cell sheet 32 is preferably one of XBC, MWT, and shingled metal-free busbar, and the positive and negative metal electrodes are extracted from the back. The second preferred cell sheet 32 is a cell sheet with busbars on both the front and back, such as one of PERC, TOPCON, and HJT. In this way, the appearance of the cell sheet layer 30 can be kept consistent, and the metal busbar and metal electrode can avoid affecting the front appearance of the cell sheet layer 30, thereby improving the aesthetic appearance.

[0055] The plurality of cell sheets 32 connected in series can be a plurality of complete cell sheets 32 connected in series, a plurality of 1 / 2 cell sheets 32 connected in series, a plurality of 1 / 3 cell sheets 32 connected in series, or a plurality of 1 / 4 cell sheets 32 connected in series.

[0056] In one embodiment, the cell sheet layer 30 includes 3 cell strings 31 connected in series, each cell string 31 including 12 1 / 2 cell sheets 32 connected in series, and the power section of the cell sheet layer 30 is between 100 W and 110 W.

[0057] In another embodiment, the cell sheet layer 30 includes 6 cell strings 31 connected in series to form a cell string 31 group, each cell string 31 including 12 1 / 2 cell sheets 32 connected in series, and 2 cell string 31 groups are connected in parallel, and the power section of the cell sheet layer 30 is between 200 W and 210 W.

[0058] The solder strip 33 is used to electrically connect the plurality of cell sheets 32, and the solder strip 33 can be made of silver, tin, or alloy conductive material to improve the conductivity of the solder strip 33. The plurality of cell sheets 32 can be arranged in a flat manner or in a stacked manner.

[0059] Referring to Figure 5 and Figure 6In some embodiments, the solder strip 33 comprises a plurality of first solder segments 34 and at least one second solder segment 35, the first solder segments 34 are connected with the corresponding one of the battery pieces 32, and the second solder segment 35 connects two adjacent first solder segments 34 in the first direction D1, the second solder segment 35 is located between the two adjacent battery pieces 32 and across the lamination area 36 of the two adjacent battery pieces 32, and the second solder segment 35 is in a flat shape.

[0060] In this way, the second solder segment 35 is located between the two adjacent battery pieces 32 and across the lamination area 36 of the two adjacent battery pieces 32, and the second solder segment 35 is in a flat shape, so that the contact area between the second solder segment 35 and the battery pieces 32 is increased, the pressure on the battery pieces 32 is reduced, and the defects such as cracks of the battery pieces 32 are reduced.

[0061] Specifically, the first solder segments 34 of the solder strip 33 can be soldered with the battery pieces 32, and the number of the second solder segments 35 is one less than the number of the first solder segments 34, for example, when the number of the first solder segments 34 is 2, the number of the second solder segments 35 is 1. The first solder segments 34 and the second solder segments 35 can be in an integrated structure.

[0062] The lamination area 36 of the two adjacent battery pieces 32 refers to an area where the two adjacent battery pieces 32 have an overlapping area. The second solder segment 35 across the lamination area 36 means that the ends of the second solder segment 35 in the first direction D1 both extend out of the lamination area 36. The second solder segment 35 in a flat shape means that the width of the second solder segment 35 is greater than the height of the second solder segment 35.

[0063] It should be noted that the surface of the second solder segment 35 with the largest area faces the battery pieces 32 or is in contact with the battery pieces 32. The first direction D1 can be the direction in which all the battery pieces 32 in each battery string 31 are arranged in series.

[0064] Please refer to Figure 2 In some embodiments, the photovoltaic module 100 comprises a second encapsulation film layer 70, and the second encapsulation film layer 70 is located between the battery piece layer 30 and the backboard 20.

[0065] In this way, the backboard 20 and the battery piece layer 30 can be connected and fixed through the second encapsulation film layer 70, the lamination and encapsulation of the backboard 20 and the battery piece layer 30 are realized, and a stable and reliable structure is formed. In addition, the second encapsulation film layer 70 can play a buffering role between the backboard 20 and the battery piece layer 30, preventing the lamination from causing broken pieces. The second encapsulation film layer 70 is made of one of EVA or POE materials or EPE materials. The material of the first encapsulation film layer 40 and the material of the second encapsulation film layer 70 can be the same or different.

[0066] In some embodiments, the thickness of the first encapsulant film layer 40 and / or the second encapsulant film layer 70 is 0.3mm-0.7mm.

[0067] When the thickness of the first encapsulant film layer 40 and / or the second encapsulant film layer 70 is too thin, reliable adhesion between the panel 10 and the cell sheet layer 30 and between the backboard 20 and the cell sheet layer 30 cannot be achieved; when the thickness of the first encapsulant film layer 40 and / or the second encapsulant film layer 70 is too thick, the performance of the photovoltaic module 100 will be affected. By limiting the thickness of the first encapsulant film layer 40 and / or the second encapsulant film layer 70 within the above range, reliable adhesion between the panel 10 and the cell sheet layer 30 and between the backboard 20 and the cell sheet layer 30 is achieved while the performance of the photovoltaic module 100 is ensured.

[0068] Specifically, the thickness of the first encapsulant film layer 40 and / or the second encapsulant film layer 70 can be a point value of any one of 0.3mm-0.7mm or a range value between any two of them. For example, the thickness of the first encapsulant film layer 40 is 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, etc., and the thickness of the second encapsulant film layer 70 is 0.35mm, 0.45mm, 0.55mm, 0.65mm, etc. The thickness of the first encapsulant film layer 40 and the thickness of the second encapsulant film layer 70 can be the same or different.

[0069] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A photovoltaic module, characterized by, The photovoltaic module comprises: a panel; a back plate which is laminated with the panel; a cell sheet layer which is between the panel and the back plate; and a first encapsulation film layer which is between the cell sheet layer and the panel. A color layer is provided between the panel and the first encapsulation film layer, the color layer is a light-transmitting layer, and the panel is provided with a concave-convex structure on a side facing away from the first encapsulation film layer. The cell sheet layer comprises a plurality of cell strings which are connected in series, each cell string comprises a plurality of cell sheets, and all the cell sheets in each cell string are connected in series by a welding strip. The welding strip comprises a plurality of first welding sections and at least one second welding section, the first welding sections are connected to corresponding cell sheets, the second welding section connects two adjacent first welding sections in a first direction, the second welding section is between and across the laminated areas of two adjacent cell sheets, and the second welding section is in a flat shape. The concave-convex structure is an abrasive concave-convex structure.

2. The photovoltaic module of claim 1, wherein, The light transmittance of the panel is greater than that of the color layer.

3. The photovoltaic module of claim 1, wherein, The panel is one of a PET plate, a CPC plate and a HPC plate.

4. The photovoltaic module of claim 1, wherein, The light transmittance of the back plate is less than that of the color layer.

5. The photovoltaic module of claim 1, wherein, The thickness of the panel is 0.18-0.3 mm, and / or the thickness of the back plate is 0.18-0.4 mm.

6. The photovoltaic module of claim 1, wherein, The photovoltaic module comprises a second encapsulation film layer which is between the cell sheet layer and the back plate.

7. The photovoltaic module of claim 1, wherein, The thickness of the first encapsulation film layer and / or the second encapsulation film layer is 0.3-0.7 mm.

8. The photovoltaic module of claim 7, wherein, ​

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