Sectional material, packaging frame and photovoltaic module

Abstract

The utility model relates to a section bar, a packaging frame and a photovoltaic assembly. The sectional material comprises a first-direction reinforced resin layer and a second-direction reinforced resin layer which are arranged in a stacked mode, the content of weather-proof auxiliaries in the first-direction reinforced resin layer is higher than that of weather-proof auxiliaries in the second-direction reinforced resin layer, and the first direction intersects with the second direction. The profile does not need to be provided with a coating, so that the cost is reduced, and meanwhile, the mechanical property and weather resistance are ensured.

Description

Technical Field

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

[0002] Traditional photovoltaic modules mostly use aluminum alloy frames. Aluminum alloy frames have excellent properties such as high strength, strong firmness, good electrical conductivity, good corrosion and oxidation resistance, strong tensile strength, convenient transportation and installation, and easy recycling. However, due to the high energy consumption and carbon emissions of primary aluminum, its further application is restricted, and composite frames prepared from fiber-reinforced resin materials are gradually being used. The composite frame forms a profile including a fiber-reinforced polyresin layer by molding a fiber-reinforced material and a resin raw material. However, the weather resistance of this profile is poor, and researchers spray a protective coating on the surface of the profile to improve its weather resistance. However, the additional spraying process significantly increases both the process complexity and cost. Summary of the Utility Model

[0003] Based on this, some embodiments of the present application provide a profile that can improve weather resistance while reducing costs.

[0004] In addition, some other embodiments of the present application also provide a packaging frame and a photovoltaic module.

[0005] A profile includes a first-direction reinforced resin layer and a second-direction reinforced resin layer that are stacked, and the content of weather resistance additives in the first-direction reinforced resin layer is higher than that in the second-direction reinforced resin layer, and the first direction and the second direction intersect.

[0006] The above profile includes a first-direction reinforced resin layer and a second-direction reinforced resin layer that are stacked. The content of weather resistance additives in the first-direction reinforced resin layer is higher than that in the second-direction reinforced resin layer. The first direction and the second direction intersect. The first-direction reinforced resin layer can provide mechanical properties in the first direction, and the second-direction reinforced resin layer can provide mechanical properties in the second direction. Moreover, the content of weather resistance additives in the first-direction reinforced resin layer is high, and the weather resistance is good, which can provide a certain weather resistance barrier for a long time. When the weather resistance barrier of this layer fails, the second-direction reinforced resin layer can continue to provide a certain weather resistance, ensuring the mechanical property requirements of the profile during the entire life cycle of the photovoltaic module, enabling the profile to not require spraying a protective layer, reducing costs, and at the same time ensuring the mechanical properties and weather resistance of the profile.

[0007] In one of the embodiments, the first direction and the second direction are perpendicular.

[0008] In one embodiment, the first-direction reinforced resin layer includes a glass fiber mat-reinforced polyurethane layer; and / or, the second-direction reinforced resin layer includes a glass fiber-reinforced polyurethane layer.

[0009] In one embodiment, the content of the weather resistance aid decreases in a gradient manner in the direction from the first-direction reinforced resin layer to the second-direction reinforced resin layer.

[0010] In one embodiment, the thickness a of the first-direction reinforced resin layer satisfies: 0 < a ≤ 1 mm.

[0011] In one embodiment, the thickness b of the second-direction reinforced resin layer satisfies: 0 < b ≤ 5 mm.

[0012] In one embodiment, the thickness a of the first-direction reinforced resin layer and the thickness b of the second-direction reinforced resin layer satisfy: a < b.

[0013] In one embodiment, the first-direction reinforced resin layer and the second-direction reinforced resin layer are connected into an integral structure.

[0014] An encapsulation frame includes a frame body and a limiting member. The frame body has a cavity for inserting a connecting member. One side edge of the limiting member is connected to the outer surface of one side wall of the frame body. An installation area for installing a photovoltaic laminate is formed between the limiting member and this side wall of the frame body. Among them, at least one of the frame body and the limiting member adopts the above-mentioned profile.

[0015] A photovoltaic module includes a plurality of the above-mentioned encapsulation frames, connecting members, and photovoltaic laminates. The plurality of encapsulation frames are sequentially connected through the connecting members to enclose the installation area, and the photovoltaic laminate is encapsulated within the installation area. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A cross-sectional schematic diagram of a profile according to some embodiments of the present application;

[0017] Figure 2 A cross-sectional schematic diagram of a conventional frame;

[0018] Figure 3 A structural schematic diagram of an encapsulation frame according to some embodiments of the present application;

[0019] Figure 4 A structural schematic diagram of an encapsulation frame and a connecting member according to some embodiments of the present application.

[0020] Description of the reference numerals:

[0021] Profile 100, first-direction reinforcing resin layer 110, second-direction reinforcing resin layer 120, frame body 102, limiting member 104, cavity 1022, installation area 106, encapsulation assembly 10, connecting member 20 of some embodiments of the present application;

[0022] Traditional frame 300, glass fiber mat reinforced polyurethane layer 310, glass fiber reinforced polyurethane layer 320 and weather-resistant protective layer 330. Detailed implementation manners

[0023] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the understanding of the disclosure of the present utility model can be more thorough and comprehensive.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0026] The term "optionally" etc. in the present application means that in some cases, embodiments of the present application that can provide certain beneficial effects. However, in the same case or other cases, other embodiments may also be optional. In addition, the description of one or more optional embodiments does not imply that other embodiments are not available, nor is it intended to exclude other embodiments from the scope of the present application.

[0027] When a numerical range is disclosed in the present application, the above range is considered continuous and includes the minimum and maximum values of the range, as well as each value between such minimum and maximum values. Further, when the range refers to integers, it includes each integer between the minimum and maximum values of the range. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be combined. In other words, unless otherwise specified, all ranges disclosed in the present application should be understood to include any and all sub-ranges subsumed therein.

[0028] In the present application, among the technical features described in an open-ended manner, it includes a closed technical solution composed of the listed features, and also includes an open technical solution containing the listed features.

[0029] The terms "include" and "have" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or components inherent to these processes, methods, products, or devices.

[0030] Referring to "embodiment" in the present application means that a specific feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrence of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments.

[0031] Please refer to Figure 1 , a first aspect of the present application provides a profile 100, including: a first-direction reinforcing resin layer 110 and a second-direction reinforcing resin layer 120 arranged in a stacked manner, wherein the content of the weather-resistant additive in the first-direction reinforcing resin layer 110 is higher than the content of the weather-resistant additive in the second-direction reinforcing resin layer 120, and the first direction and the second direction intersect.

[0032] In the present application, the first-direction reinforcing resin layer 110 is used to provide the mechanical properties of the profile 100 in the first direction, and the second-direction reinforcing resin layer 120 is used to provide the mechanical properties of the profile 100 in the second direction.

[0033] Please refer to Figure 2, the traditional photovoltaic module frame 300 includes a glass fiber mat reinforced polyurethane layer 310 and a glass fiber reinforced polyurethane layer 320. The glass fiber mat reinforced polyurethane layer 310 provides mechanical properties in the first direction, and the glass fiber reinforced polyurethane layer 320 provides mechanical properties in the second direction. The cooperation of the two layers ensures the overall mechanical properties of the frame 300. However, its weather resistance is poor. Under the action of UV, chemical reactions will occur in the benzene ring of the polyurethane. Specifically, the -NCO far from -CH3 in the benzene ring becomes quinone. Quinone is a chromogenic group and has a loose structure, which will reduce the coating integrity of the polyurethane to the glass fiber (or glass fiber mat). Macroscopically, it is manifested as the glass fiber (or glass fiber mat) in the frame 300 coming out, and the mechanical properties decline.

[0034] To improve its weather resistance, researchers spray a weather-resistant protective layer 330 on the surface of the frame 300, so that the frame 300 can withstand 30 years of environmental erosion and aging outdoors. Please refer to Figure 2 , in the cross-sectional direction, the traditional frame 300 includes a weather-resistant protective layer 330, a glass fiber mat reinforced polyurethane layer 310, and a glass fiber reinforced polyurethane layer 320 arranged in layers. However, the additional spraying process of the above-mentioned frame 300 significantly increases both the process complexity and the cost. For example, the cost of the protective layer accounts for more than 25% of the cost of the entire frame 300, and after the profile is manufactured, the profile needs to be sprayed, which increases the equipment cost and the number of processes and is not conducive to industrial production. As the application of photovoltaic modules becomes more and more widespread and the extreme environments faced are increasing, there is an urgent need to develop a frame that can improve weather resistance while reducing costs. Based on this, the inventors of the present application provide a new type of photovoltaic module profile 100.

[0035] The above-mentioned profile 100 of some embodiments of the present application includes a first-direction reinforcing resin layer 110 and a second-direction reinforcing resin layer 120 arranged in layers. The content of the weather-resistant auxiliary agent in the first-direction reinforcing resin layer 110 is higher than that in the second-direction reinforcing resin layer 120. The first-direction reinforcing resin layer 110 can provide mechanical properties in the first direction, and the second-direction reinforcing resin layer 120 can provide mechanical properties in the second direction. Moreover, the content of the weather-resistant auxiliary agent in the first-direction reinforcing resin layer 110 is high, and the weather resistance is high, which can provide a certain weather-resistant barrier for a long time. When the weather-resistant barrier of this layer fails, the second-direction reinforcing resin layer 120 can continue to provide a certain weather resistance, ensuring the mechanical property requirements of the profile 100 throughout its life cycle, so that without spraying a protective layer and reducing costs, the mechanical properties and weather resistance of the profile 100 are guaranteed.

[0036] In some embodiments, the first direction and the second direction are perpendicular. For example, the first direction is horizontal and the second direction is vertical.

[0037] In some embodiments, the first-direction reinforcing resin layer 110 comprises a glass fiber mat-reinforced polyurethane layer. The second-direction reinforcing resin layer 120 comprises a glass fiber-reinforced polyurethane layer. It can be understood that the glass fiber mat-reinforced polyurethane layer is obtained by molding a glass fiber mat with polyurethane raw materials, weather resistance aids, etc. The specific process is common in the art and is not particularly limited herein. For example, it is obtained by injecting glue, guiding yarn, pulling through a mold, and cutting. Similarly, the glass fiber-reinforced polyurethane layer is generated by a molding process with glass fibers, polyurethane raw materials, weather resistance aids, etc. Taking the glass fiber-reinforced polyurethane layer as an example, in this layer, the glass fibers are similar to "steel bars" and the polyurethane is similar to "cement", and the two cooperate to provide good mechanical properties in the second direction.

[0038] When the profile 100 is applied to a photovoltaic module, the first-direction reinforcing resin layer 110 is located on the outer surface of the photovoltaic module.

[0039] In the present application, the glass fiber mat and the glass fibers are not particularly limited and can be the glass fiber mat and glass fibers commonly used in the art. The glass fiber mat can provide the mechanical properties of the profile 100 in the first direction, and the glass fibers can provide the mechanical properties of the profile 100 in the second direction.

[0040] In some embodiments, the content of the weather resistance aid decreases in a gradient along the direction from the first-direction reinforcing resin layer 110 to the second-direction reinforcing resin layer 120. Under the action of temperature and concentration difference, the weather resistance aid continuously migrates from the first-direction reinforcing resin layer 110 to the second-direction reinforcing resin layer 120, forming a weather resistance aid with a gradient distribution characteristic.

[0041] In some embodiments, the weather resistance aid includes one or more of an ultraviolet absorber and an antioxidant. Specifically, the ultraviolet absorber can be a compound with a high bond energy commonly used in the art, such as triazine compounds, benzotriazole compounds, benzophenone compounds, etc. The antioxidant can also be a substance with a high free radical activator commonly used in the art, such as hindered phenol antioxidants, benzofuranone antioxidants, etc.

[0042] In some embodiments, the thickness a of the first-direction reinforcing resin layer 110 satisfies: 0 < a ≤ 1 mm. For example, the thickness a of the first-direction reinforcing resin layer 110 can be, but is not limited to, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, or the range composed of any two of these values.

[0043] In some embodiments, the thickness b of the second-direction reinforcing resin layer 120 satisfies: 0 < b ≤ 5 mm. For example, the thickness b of the second-direction reinforcing resin layer 120 may be, but is not limited to, 0.2 mm, 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, or the range formed by any two of these values.

[0044] In some embodiments, the thickness a of the first-direction reinforcing resin layer 110 and the thickness b of the second-direction reinforcing resin layer 120 satisfy: a < b.

[0045] In some embodiments, the first-direction reinforcing resin layer 110 and the second-direction reinforcing resin layer 120 are connected into an integral structure. It can be understood that the integral structure means that the first-direction reinforcing resin layer 110 and the second-direction reinforcing resin layer 120 are formed in one processing step in the same process, that is, the first-direction reinforcing resin layer 110 and the second-direction reinforcing resin layer 120 are not separately processed and then connected together. With the integral structure, the combination between the two is tight, and there is no obvious interlayer interface except for the appearance difference.

[0046] In some of these embodiments, the profile 100 is prepared by the following steps: immersing the first-direction reinforcing material in a resin raw material containing a first concentration of weather-resistant additives, taking it out, and molding the immersed first-direction reinforcing material, the second-direction reinforcing material, and a resin raw material containing a second concentration of weather-resistant additives to obtain the first-direction reinforcing resin layer 110 and the second-direction reinforcing resin layer 120 arranged in layers, where the first concentration is greater than the second concentration. Through the above steps, the first-direction reinforcing resin layer 110 and the second-direction reinforcing resin layer 120 are formed in one molding.

[0047] In one embodiment, the first concentration is 1% - 50%. By first immersing the first-direction reinforcing material in a resin raw material containing a higher content of weather-resistant additives, the first-direction reinforcing material itself has a higher content of weather-resistant additives, which can provide reliable weather resistance and mechanical properties for the profile 100. Then, it is immersed together with the second-direction reinforcing material in a resin raw material containing a lower content of weather-resistant additives, so as to obtain a two-layer structure with different contents of weather-resistant additives through one molding.

[0048] In one embodiment, the second concentration is greater than 0 and less than or equal to 5%.

[0049] It can be understood that the above only provides some relatively specific contents of weather-resistant additives, but is not limited to this, and can also be adjusted according to the actual application environment of the photovoltaic module.

[0050] It can be understood that the resin raw material can be commonly used in the art. For example, the resin is polyurethane, and the resin raw material includes isocyanate, polyol, etc.

[0051] It can be understood that in some other embodiments, the first-direction reinforced resin layer 110 and the second-direction reinforced resin layer 120 can also be of a split structure, and the profile 100 is prepared by a two-step molding method, that is: the first-direction reinforcing material and the resin raw material containing the weather-resistant aid with the first concentration are hot-pressed to obtain the first-direction reinforced resin layer 110, the second-direction reinforcing material and the resin raw material containing the weather-resistant aid with the second concentration are hot-pressed to obtain the second-direction reinforced resin layer 120, and then the first-direction reinforced resin and the second-direction reinforced resin layer 120 are compounded to obtain the photovoltaic module profile 100, wherein the first concentration is greater than the second concentration.

[0052] The specific hot-pressing process can be commonly used in the art. Specifically, the resin raw material is added into the injection box, the fiber reinforcing material is introduced by the yarn guide plate, and the photovoltaic module profile 100 is obtained by traction and cutting using a mold.

[0053] Please refer to Figure 3 , a second aspect of the present application provides a packaging frame 10, including a frame body 102 and a limiting member 104. The frame body 102 has a cavity 1022 for inserting a connecting member. One side edge of the limiting member 104 is connected to the outer surface of one side wall of the frame body 102. An installation area 106 for installing a photovoltaic laminate is formed between the limiting member 104 and the side wall of the frame body 102. Among them, at least one of the frame body 102 and the limiting member 104 adopts the above-mentioned profile 100.

[0054] In some of these embodiments, the frame body 102 has a hollow quadrangular prism structure. The frame body 102 includes a first side wall, a second side wall, a third side wall, and a fourth side wall connected in sequence. The limiting member 104 is connected to the outer surface of the first side wall, and an installation area 106 for installing a photovoltaic laminate is formed between the limiting member 104 and the first side wall of the frame body 102.

[0055] A third aspect of the present application provides a photovoltaic module, including the above-mentioned packaging frame and a photovoltaic laminate, and the photovoltaic laminate is encapsulated by the packaging frame.

[0056] In some of these embodiments, there are multiple packaging frames, and the multiple packaging frames are connected by connecting members.

[0057] Please refer to Figure 4 , the photovoltaic module includes multiple packaging frames 10, connecting members 20, and a photovoltaic laminate. The multiple packaging frames 10 are sequentially connected by the connecting members 20 to enclose the installation area 106, and the photovoltaic laminate is encapsulated in the installation area 106.

[0058] Specifically, there are four encapsulation frames 10 and four connecting members 200. One connecting member 200 is used to connect two adjacent encapsulation frames 10, and the four encapsulation frames 10 are sequentially connected by the four connecting members 200 to enclose the installation area 106.

[0059] It can be understood that the photovoltaic laminate includes glass, a first encapsulation adhesive film, a solar cell, a second encapsulation adhesive film, and a backsheet stacked in sequence, or the photovoltaic laminate includes a first glass, a first encapsulation adhesive film, a solar cell, a second encapsulation adhesive film, and a second glass stacked in sequence.

[0060] In some embodiments, in the photovoltaic module, the first-direction enhanced resin layer is located on the outer surface of the photovoltaic module.

[0061] The above-mentioned photovoltaic module can reduce costs while improving its weather resistance and mechanical properties, is more conducive to industrial production, and can be applied to various environments.

[0062] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0063] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A profile (100), characterized in that, Comprising: A first-direction reinforced resin layer (110) and a second-direction reinforced resin layer (120) which are stacked, wherein the content of weather-resistant additives in the first-direction reinforced resin layer (110) is higher than that in the second-direction reinforced resin layer (120), and the first direction intersects with the second direction.

2. The profile (100) according to claim 1, characterized in that, The first direction and the second direction are perpendicular.

3. The profile (100) according to claim 2, characterized in that, The first-direction reinforced resin layer (110) comprises a glass fiber mat-reinforced polyurethane layer; and / or, the second-direction reinforced resin layer (120) comprises a glass fiber-reinforced polyurethane layer.

4. The profile (100) according to any one of claims 1 to 3, characterized in that, The content of the weather-resistant additives decreases in a gradient manner along the direction from the first-direction reinforced resin layer (110) to the second-direction reinforced resin layer (120).

5. The profile (100) according to claim 1, characterized in that, The thickness a of the first-direction reinforced resin layer (110) satisfies: 0 < a ≤ 1 mm.

6. The profile (100) according to any one of claims 1 to 3 and 5, characterized in that, The thickness b of the second-direction reinforced resin layer (120) satisfies: 0 < b ≤ 5 mm.

7. The profile (100) according to claim 6, characterized in that, The thickness a of the first-direction reinforced resin layer (110) and the thickness b of the second-direction reinforced resin layer (120) satisfy: a < b.

8. The profile (100) according to any one of claims 1 to 3 and 5, characterized in that, The first-direction reinforced resin layer (110) and the second-direction reinforced resin layer (120) are connected into an integral structure.

9. An encapsulation frame (10), characterized in that, Comprising a frame body (102) and a limiting member (104), the frame body (102) has a cavity (1022) for inserting a connecting member, one side edge of the limiting member (104) is connected to the outer surface of one side wall of the frame body (102), and an installation area (106) for installing a photovoltaic laminate is formed between the limiting member (104) and the side wall of the frame body (102), wherein at least one of the frame body (102) and the limiting member (104) adopts the profile (100) described in any one of claims 1 to 8.

10. A photovoltaic module, characterized in that, Comprising a plurality of encapsulation frames (10) as described in claim 9, connecting members (20) and photovoltaic laminates. The plurality of encapsulation frames (10) are sequentially connected through the connecting members (20) to enclose the installation area (106), and the photovoltaic laminates are encapsulated in the installation area (106).

Images