Photovoltaic module

Abstract

The invention relates to the field of photovoltaic technology, in particular to a photovoltaic module. The photovoltaic module comprises a laminated piece, an L-shaped edge covering piece and an adhesive film, wherein the L-shaped edge covering piece is adhered to the peripheral side of the laminated piece through the adhesive film. Through the arrangement of the adhesive film, the stable connection between the L-shaped edge covering piece and the laminated piece is realized, so that the problems that the bonding is not firm and the L-shaped edge covering piece falls off due to the fact that the L-shaped edge covering piece is bonded by adopting an overflowed packaging material after a laminating process in the prior art are solved, and the product yield is improved. Meanwhile, compared with liquid silica gel in the prior art, the adhesive film has shorter curing time, so that the production efficiency can be improved, and the purpose of saving cost is achieved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, and more particularly to a photovoltaic module. Background Technology

[0002] During daily use, dust and dirt often accumulate on the front glass of photovoltaic (PV) modules, affecting their power generation efficiency. To address this issue, industry professionals have adopted an L-shaped edge-wrapping structure to encapsulate the laminated components. The excess encapsulation material from the lamination process between the front and back glass is then used to bond the L-shaped edge-wrapping structure. However, the excess encapsulation material cannot completely fill the internal space of the L-shaped edge-wrapping structure, leading to detachment between the L-shaped edge-wrapping structure and the laminated component, reducing product yield. Alternatively, some industry professionals use liquid silicone to bond the L-shaped edge-wrapping structure to the laminated component; however, liquid silicone has a long curing time, impacting production efficiency and increasing costs.

[0003] Therefore, there is an urgent need to design a photovoltaic module to solve the above technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a photovoltaic module that can improve the stability and reliability of the bonding between the L-shaped edge banding and the laminate, thereby increasing product yield, improving production efficiency, and saving costs.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] The present invention provides a photovoltaic module, including a laminate, an L-shaped edge banding, and an adhesive film, wherein the L-shaped edge banding is bonded to the periphery of the laminate by the adhesive film.

[0007] As an optional technical solution for photovoltaic modules, the basis weight of the adhesive film is set to 480 g / m³. 2 -600g / m 2 The thickness of the adhesive film is set to 0.5mm-0.8mm.

[0008] As an optional technical solution for photovoltaic modules, the adhesive film and the L-shaped edge-sealing component are laminated simultaneously at a lamination temperature of 120℃-140℃, and the peel strength of the adhesive film is 65N / cm-85N / cm.

[0009] As an optional technical solution for photovoltaic modules, the L-shaped edging component is a metal component.

[0010] As an optional technical solution for photovoltaic modules, the adhesive film has a first adhesive portion and a second adhesive portion that are connected to each other, and the L-shaped edge-sealing component has a first side and a second side that are adjacent to each other. The first side is disposed facing the side of the laminate, and the second side is disposed facing the back of the laminate. The first adhesive portion is connected to the first side, and the second adhesive portion is connected to the second side.

[0011] As an optional technical solution for photovoltaic modules, the first adhesive portion and the second adhesive portion are perpendicular to each other.

[0012] As an optional technical solution for photovoltaic modules, along the first direction, the length of the first adhesive portion is not greater than the length of the first side; along the second direction, the length of the second adhesive portion is not greater than the length of the second side, and the first direction and the second direction are perpendicular to each other.

[0013] As an optional technical solution for photovoltaic modules, the adhesive film is one of POE, PVB or EVA.

[0014] As an optional technical solution for a photovoltaic module, the photovoltaic module further includes an upper frame, an upper pad, a lower frame, and a lower pad. The upper pad is connected to the upper frame, and the lower pad is connected to the lower frame. The upper pad and the lower pad are disposed opposite to each other. The laminate is sandwiched between the upper pad and the lower pad, and the lower pad covers at least a portion of the L-shaped edge banding.

[0015] As an optional technical solution for photovoltaic modules, the width of the upper frame is greater than the width of the lower frame.

[0016] The beneficial effects of the present invention include at least the following:

[0017] This invention provides a photovoltaic module comprising a laminate, an L-shaped edge-sealing component, and an adhesive film. The L-shaped edge-sealing component is bonded to the periphery of the laminate via the adhesive film. The adhesive film ensures a stable connection between the L-shaped edge-sealing component and the laminate, avoiding the problem of weak adhesion and detachment of the L-shaped edge-sealing component caused by excess encapsulation material after lamination in existing technologies, thus improving product yield. Furthermore, the adhesive film has a shorter curing time compared to liquid silicone in existing technologies, thereby improving production efficiency and saving costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the photovoltaic module provided in an embodiment of the present invention;

[0020] Figure 2 This is an exploded view of the photovoltaic module provided in the embodiment of the present invention;

[0021] Figure 3 This is a partial cross-sectional view of the photovoltaic module provided in an embodiment of the present invention;

[0022] Figure 4 This is a side view of the photovoltaic module provided in an embodiment of the present invention.

[0023] Figure Labels

[0024] 100, laminated part; 200, L-shaped edge banding part; 300, adhesive film; 310, first adhesive part; 320, second adhesive part; 400, upper frame; 500, upper pad; 600, lower frame; 700, lower pad. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0032] This embodiment provides a photovoltaic module that can improve the stability and reliability of the bonding between the L-shaped edge banding and the laminate, increase product yield, improve production efficiency, and save costs.

[0033] like Figures 1-3As shown, the photovoltaic module mainly includes a laminate 100, an L-shaped edge-sealing component 200, and an adhesive film 300. The L-shaped edge-sealing component 200 is bonded to the periphery of the laminate 100 via the adhesive film 300. The adhesive film 300 ensures a stable connection between the L-shaped edge-sealing component 200 and the laminate 100, thus avoiding the problem of weak adhesion and detachment of the L-shaped edge-sealing component 200 caused by excess encapsulation material after lamination in existing technologies, thereby improving product yield. Furthermore, the adhesive film 300 has a shorter curing time compared to liquid silicone in existing technologies, thus improving production efficiency and saving costs.

[0034] In this embodiment, the adhesive film 300 can be made of one of the following materials: POE, PVB, or EVA. The raw materials are readily available and the cost is low. Preferably, the adhesive film 300 in this embodiment is made of the same material as the front and back adhesive films in the laminate 100, which improves work efficiency and eliminates the impact of changing consumables on the processing cycle.

[0035] Optionally, the L-shaped edge banding 200 in this embodiment can be made of metal, such as stainless steel, to increase the mechanical strength of the photovoltaic module.

[0036] like Figures 1-3 As shown, the adhesive film 300 has a first adhesive portion 310 and a second adhesive portion 320 connected to each other. The L-shaped edge-sealing member 200 has a first side and a second side adjacent to each other. The first side is disposed opposite to the side of the laminate 100, and the second side is disposed opposite to the back of the laminate 100. The first adhesive portion 310 is connected to the first side, and the second adhesive portion 320 is connected to the second side. This allows the L-shaped edge-sealing member 200 to cover the side and back of the laminate 100, thereby avoiding the problem of dust and dirt accumulation on the light-receiving surface of the photovoltaic module caused by the use of C-shaped edge-sealing members in the conventional technology, and improving the power generation efficiency of the photovoltaic module. In other words, in this embodiment, the L-shaped edge-sealing member 200 covers the side and back of the laminate 100, so that dust and dirt on the light-receiving surface of the laminate 100 can be easily flowed out of the photovoltaic module with the external airflow, thereby preventing dust and dirt from blocking the photovoltaic module and improving the power generation efficiency of the photovoltaic module.

[0037] The first adhesive portion 310 and the second adhesive portion 320 can increase the bonding area between the adhesive film 300 and the L-shaped edge banding 200, thereby improving the stability and reliability of the bonding.

[0038] Since the sides and back of the laminate 100 are perpendicular to each other, in this embodiment, the first adhesive portion 310 and the second adhesive portion 320 are also set to be perpendicular to each other. This allows the adhesive film 300 to fit well with the laminate 100 as much as possible, improving the stability and reliability of the bonding and reducing the risk of the adhesive film 300 falling off later.

[0039] Optionally, in this embodiment, along the first direction, the length of the first adhesive portion 310 is not greater than the length of the first side; along the second direction, the length of the second adhesive portion 320 is not greater than the length of the second side, and the first and second directions are perpendicular to each other. This maximizes the bonding area between the adhesive film 300 and the L-shaped edge-wrapping component 200, improving the stability and reliability of the bonding. Furthermore, it avoids adhesive overflow caused by excessively long first adhesive portion 310 and / or second adhesive portion 320, saving costs and improving the yield of photovoltaic modules. The first and second directions are as follows: Figure 3 As shown in the image.

[0040] Optionally, the thickness of the adhesive film 300 in this embodiment is set to 0.5mm-0.8mm. For example, the thickness of the adhesive film 300 can be set to 0.5mm, 0.6mm, 0.7mm, 0.8mm, etc. When the thickness of the adhesive film 300 is too thin (less than 0.5mm), the bonding performance will be reduced, which may easily lead to failure risks such as photovoltaic module detachment from the frame; when the thickness of the adhesive film 300 is too thick (greater than 0.8mm), this undoubtedly increases the manufacturing cost of the photovoltaic module.

[0041] Optionally, in this embodiment, the basis weight of the adhesive film 300 is set to 480 g / m². 2 -600g / m 2 For example, the basis weight of the adhesive film 300 can be set to 480 g / m². 2 500g / m 2 600g / m 2 Wait. When the basis weight of the adhesive film 300 is less than 480 g / m² 2 When the adhesive film 300 has a lower bonding strength, it reduces the adhesion performance of the adhesive film 300, which can easily lead to failure risks such as photovoltaic module detachment from the frame; when the basis weight of the adhesive film 300 is greater than 600 g / m³, it can also cause damage. 2 This would increase the manufacturing cost of the adhesive film 300. Therefore, the basis weight of the adhesive film 300 is controlled at 480 g / m². 2 -600g / m 2 This approach ensures the bonding performance of the adhesive film 300 while also saving costs.

[0042] Optionally, the adhesive film 300 and the L-shaped edge banding 200 are laminated simultaneously, and the lamination temperature is set to 120℃-140℃.

[0043] Specifically, the adhesive film 300 and the L-shaped edge-sealing component 200 are laminated in two steps. The temperature of the first lamination is set to 120℃-135℃, and the temperature of the second lamination is set to 120℃-140℃. This two-step lamination effectively removes air bubbles from the L-shaped edge-sealing component 200, preventing them from affecting the quality of the photovoltaic module. A single lamination step cannot completely remove air bubbles from the L-shaped edge-sealing component 200. Three or more lamination steps are cumbersome, time-consuming, labor-intensive, reduce work efficiency, and increase the energy consumption of the laminator. Therefore, this application's two-step lamination method not only removes air bubbles from the L-shaped edge-sealing component 200 but also ensures work efficiency and saves costs.

[0044] Optionally, after two-step lamination, the peel strength of the adhesive film 300 in this embodiment is set to 65 N / cm-85 N / cm. This ensures good adhesion between the adhesive film 300 and the glass of the laminate 100 and the L-shaped edge banding 200.

[0045] Furthermore, the thickness of the adhesive film 300 is one of the important factors affecting the basis weight. A thicker adhesive film 300 increases the basis weight, thereby increasing the load on the photovoltaic module. While a thinner adhesive film 300 reduces the basis weight, it reduces the protective effect of the adhesive film 300, making it easier for the adhesive film 300 to detach. Therefore, a balance needs to be struck between the thickness and basis weight of the adhesive film 300 to meet the performance requirements of the photovoltaic module. In this application, the thickness of the adhesive film 300 is set to 0.5mm-0.8mm, and the basis weight is set to 480g / m³. 2 -600g / m 2 This ensures suitable adhesion. Furthermore, because the peel strength of the adhesive film 300 in this application is set at 65 N / cm-85 N / cm, the adhesive film 300 not only fulfills its function of bonding and fixing photovoltaic modules, but also prevents aging and degradation of the adhesive film 300 due to environmental factors such as high temperature, high humidity, and ultraviolet radiation. The table below shows the peel strength data of the adhesive film 300 after lamination:

[0046]

[0047] like Figures 1-3 As shown, in this embodiment, the photovoltaic module further includes an upper frame 400, an upper pad 500, a lower frame 600, and a lower pad 700. The upper pad 500 is connected to the upper frame 400, and the lower pad 700 is connected to the lower frame 600. The upper pad 500 and the lower pad 700 are disposed opposite to each other. The laminate 100 is sandwiched between the upper pad 500 and the lower pad 700, and the lower pad 700 covers at least a portion of the L-shaped edge banding 200.

[0048] Optionally, in this embodiment, both the upper pad 500 and the lower pad 700 are made of rubber and have a certain degree of elasticity. The upper pad 500 and the lower pad 700 can provide a certain degree of protection for the laminate 100, preventing scratches on the laminate 100. At the same time, they also allow the upper frame 400 and the lower frame 600 to clamp the laminate 100, improving the stability of the photovoltaic module.

[0049] Optionally, in this embodiment, both the upper frame 400 and the lower frame 600 are made of aluminum alloy to reduce the weight of the photovoltaic module and achieve the purpose of lightweighting.

[0050] Optionally, the upper frame 400 and the upper pad 500 can be snapped together, the lower frame 600 and the lower pad 700 can be snapped together, and the upper frame 400 and the lower frame 600 can be snapped together.

[0051] Optionally, such as Figures 1-2 As shown, in this embodiment, the upper frame 400, upper pad 500, lower frame 600 and lower pad 700 are defined as a frame component. Multiple such frame components can be set. For example, each laminate 100 is configured with four such frame components, and the four frame components are symmetrically arranged about the axis of the laminate 100, which improves the stability and reliability of the photovoltaic module and saves costs.

[0052] like Figure 4 As shown, in this embodiment, the width of the upper frame 400 is greater than the width of the lower frame 600. In other words, the upper frame 400 and the lower frame 600 in this embodiment adopt an asymmetrical structural design. This can minimize the mechanical load reduction caused by the elimination of the edge banding on the front side of the laminate 100 (due to the use of the L-shaped edge banding 200), improve the mechanical load strength on the front side of the laminate 100, enhance the stability and reliability of the photovoltaic module, and save costs.

[0053] Optionally, the photovoltaic module in this embodiment can be configured as a single-glass photovoltaic module or a double-glass photovoltaic module.

[0054] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

[0055] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A photovoltaic module, characterized in that, It includes a laminate (100), an L-shaped edge banding (200), and an adhesive film (300), wherein the L-shaped edge banding (200) is bonded to the periphery of the laminate (100) by the adhesive film (300).

2. The photovoltaic module according to claim 1, characterized in that, The basis weight of the adhesive film (300) is set to 480 g / m³. 2 -600g / m 2 The thickness of the adhesive film (300) is set to 0.5mm-0.8mm.

3. The photovoltaic module according to claim 2, characterized in that, The adhesive film (300) and the L-shaped edge banding (200) are laminated simultaneously at a lamination temperature of 120℃-140℃, and the peel strength of the adhesive film (300) is 65N / cm-85N / cm.

4. The photovoltaic module according to claim 1, characterized in that, The L-shaped edging piece (200) is a metal part.

5. The photovoltaic module according to claim 1, characterized in that, The adhesive film (300) has a first adhesive portion (310) and a second adhesive portion (320) connected to each other. The L-shaped edge banding member (200) has a first side and a second side that are adjacent to each other. The first side is disposed facing the side of the laminate (100), and the second side is disposed facing the back of the laminate (100). The first adhesive portion (310) is connected to the first side, and the second adhesive portion (320) is connected to the second side.

6. The photovoltaic module according to claim 5, characterized in that, The first adhesive portion (310) and the second adhesive portion (320) are perpendicular to each other.

7. The photovoltaic module according to claim 5, characterized in that, Along the first direction, the length of the first adhesive portion (310) is not greater than the length of the first side; along the second direction, the length of the second adhesive portion (320) is not greater than the length of the second side, and the first direction and the second direction are perpendicular to each other.

8. The photovoltaic module according to claim 1, characterized in that, The adhesive film (300) is one of POE, PVB or EVA.

9. The photovoltaic module according to claim 1, characterized in that, The photovoltaic module further includes an upper frame (400), an upper pad (500), a lower frame (600), and a lower pad (700). The upper pad (500) is connected to the upper frame (400), and the lower pad (700) is connected to the lower frame (600). The upper pad (500) and the lower pad (700) are disposed opposite to each other. The laminate (100) is sandwiched between the upper pad (500) and the lower pad (700), and the lower pad (700) covers at least a portion of the L-shaped edge banding (200).

10. The photovoltaic module according to claim 9, characterized in that, The width of the upper border (400) is greater than the width of the lower border (600).

Images