Photovoltaic module

Abstract

The invention provides a photovoltaic module which comprises a frame which comprises a supporting part and a limiting part, and the limiting part is located on the supporting part and is bent towards a laminated piece so as to be matched with the supporting part to form a mounting groove for clamping the laminated piece; the laminated piece comprises front glass, a battery layer and back glass, the size of the back glass is larger than that of the front glass, the thickness of the back glass is smaller than the height of the mounting groove so that the back glass can extend into the mounting groove, and the total thickness of the laminated piece is not larger than the sum of the height of the mounting groove and the thickness of the limiting part. The mechanical property is improved while dust accumulation is prevented, and the probability of glass explosion of a group frame is reduced, so that the overall performance and reliability of the photovoltaic module are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of solar power generation, and in particular, to a photovoltaic module. Background Art

[0002] With the rapid development of the photovoltaic industry, the efficiency and reliability of photovoltaic modules have received increasing attention. In the design of photovoltaic modules, the frame, as an important part of the protective laminate, its structural design has a crucial impact on the performance of the module.

[0003] The prior art usually adopts a photovoltaic module frame as shown in Figure 1 . The upper surface of the photovoltaic module frame is usually 1-2 mm higher than the glass surface for protecting the laminate. However, the area near this upper surface is prone to accumulate dust under rainwashing, resulting in a reduction in the power generation efficiency of the photovoltaic panel and an increase in risks such as hot spots and glass corrosion. Further, as shown in Figure 2 . The photovoltaic module frame shown has no upper surface design and does not form a covering for the laminate. When the module is a double-glass module, the double-layer glass is prone to dislocation after lamination, so it is more likely to cause too small a contact area between the frame and the glass, leading to the risk of component explosion.

[0004] In order to overcome the above-mentioned defects existing in the prior art, there is an urgent need in the art for a photovoltaic module technology to prevent dust accumulation while reducing the probability of the frame exploding the glass, thereby improving the overall performance and reliability of the photovoltaic module. Summary of the Invention

[0005] The following gives a brief overview of one or more aspects to provide a basic understanding of these aspects. This overview is not an exhaustive survey of all contemplated aspects, and is neither intended to identify key or decisive elements of all aspects nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description to follow.

[0006] In order to overcome the above-mentioned defects existing in the prior art, the present invention provides a photovoltaic module for preventing dust accumulation while reducing the probability of the frame exploding the glass, thereby improving the overall performance and reliability of the photovoltaic module.

[0007] Specifically, the photovoltaic module provided according to the first aspect of the present invention includes: a frame including a support portion and a limiting portion, wherein the limiting portion is located above the support portion and bends towards the laminate to cooperate with the support portion to form an installation groove for clamping the laminate; and the laminate including a front glass, a battery layer and a back glass, wherein the size of the back glass is larger than that of the front glass, and its thickness is smaller than the height of the installation groove so as to extend into the installation groove, and the total thickness of the laminate is not greater than the sum of the height of the installation groove and the thickness of the limiting portion.

[0008] Further, in some embodiments of the present invention, the limiting portion abuts against the first surface of the front glass facing the front glass edge.

[0009] Further, in some embodiments of the present invention, the mounting groove clamps the back glass via an adhesive, and a diversion line is provided on the third surface below the limiting portion for diverting the adhesive when the back glass is inserted into the mounting groove.

[0010] Further, in some embodiments of the present invention, at least one concave glue overflow groove is further provided on the third surface below the limiting portion for increasing the bonding strength between the frame and the laminate.

[0011] Further, in some embodiments of the present invention, the support portion includes a corrugated concave rib area for buffering the laminate on the support portion.

[0012] Further, in some embodiments of the present invention, the length of the support surface of the support portion is set to 7 - 12 mm, the height of the mounting groove is set to 3 - 6 mm, the thickness of the laminate is set to 3.8 - 6.2 mm, and the difference in the unilateral size between the back glass and the front glass is 3 - 9 mm.

[0013] Further, in some embodiments of the present invention, the front glass and / or the back glass is made of tempered glass.

[0014] Further, in some embodiments of the present invention, the battery layer further includes: an encapsulation adhesive film, the material of which is at least one of EVA, POE, PVB, and TPU, for bonding the battery layer between the front glass and the back glass.

[0015] Further, in some embodiments of the present invention, both ends of the frame have cut surfaces with a preset angle, and adjacent frames abut against each other via the cut surfaces. The frame further includes: a first corner fitting, covering the connection portion of adjacent frames for strengthening the connection strength of the connection portion of adjacent frames.

[0016] Further, in some embodiments of the present invention, the support portion further includes a corner fitting socket, and the frame further includes: a second corner fitting, inserted into the corner fitting socket of adjacent frames for strengthening the connection strength of the connection portion of adjacent frames. Description of the Drawings

[0017] After reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings, the above features and advantages of the present invention can be better understood. In the drawings, the components are not necessarily drawn to scale, and components having similar related characteristics or features may have the same or similar reference numerals.

[0018] Figure 1 FIG. shows a schematic structural view of a photovoltaic module in the prior art.

[0019] Figure 2 FIG. shows a schematic structural view of a photovoltaic module in the prior art.

[0020] Figure 3A FIG. shows a schematic cross-sectional structural view of a photovoltaic module provided according to some embodiments of the present invention.

[0021] Figure 3B FIG. shows a 3D schematic structural view of a photovoltaic module provided according to some embodiments of the present invention.

[0022] Figure 4 FIG. shows a schematic structural view of a laminate provided according to some embodiments of the present invention.

[0023] Figure 5 FIG. shows a schematic structural view of the adhesive inside the mounting groove provided according to some embodiments of the present invention.

[0024] Figure 6 FIG. shows a schematic structural view of the adhesive during the process of inserting the back glass into the mounting groove provided according to some embodiments of the present invention.

[0025] Figure 7 FIG. shows a schematic structural view of the adhesive after the back glass is inserted into the mounting groove provided according to some embodiments of the present invention.

[0026] Figure 8 FIG. shows a schematic mounting structure view of a first corner bracket provided according to some embodiments of the present invention.

[0027] Figure 9 FIG. shows a schematic mounting structure view of a second corner bracket provided according to some embodiments of the present invention.

[0028] Reference numerals:

[0029] 10 Frame

[0030] 101 Support part

[0031] 1011 Concave rib area

[0032] 102 Limiting part

[0033] 103 Mounting groove

[0034] 1031 Diversion line

[0035] 1032 Glue overflow groove

[0036] 20 Laminated part

[0037] 201 Positive glass

[0038] 202 Battery layer

[0039] 203 Back glass

[0040] 30 First corner code

[0041] 40 Second corner code Detailed implementation mode

[0042] The following specific embodiments illustrate the implementation modes of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in combination with preferred embodiments, this does not mean that the features of this invention are limited to this implementation mode. On the contrary, the purpose of introducing the invention in combination with the implementation mode is to cover other alternatives or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, many specific details will be included in the following description. The present invention can also be implemented without using these details. In addition, in order to avoid confusing or obscuring the key points of the present invention, some specific details will be omitted in the description.

[0043] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0044] In addition, the "upper", "lower", "left", "right", "top", "bottom", "horizontal", and "vertical" used in the following description should be understood as the orientations shown in this section and the relevant drawings. This relative term is only for the convenience of description and does not mean that the device described needs to be manufactured or operated in a specific orientation, so it should not be understood as a limitation to the present invention.

[0045] It is understood that although the terms "first", "second", "third", etc. may be used herein to describe various components, regions, layers and / or parts, these components, regions, layers and / or parts should not be limited by these terms, and these terms are only used to distinguish different components, regions, layers and / or parts. Therefore, the first component, region, layer and / or part discussed below may be referred to as a second component, region, layer and / or part without departing from some embodiments of the present invention.

[0046] As mentioned above, with the rapid development of the photovoltaic industry, the efficiency and reliability of photovoltaic modules have received more and more attention. In the design of photovoltaic modules, the frame is an important part of the protective laminate, and its structural design has a vital impact on the performance of the module.

[0047] The existing technology usually adopts Figure 1 The upper surface of the photovoltaic module frame is usually 1-2 mm higher than the glass surface to protect the laminate. However, the area near the upper surface is more likely to accumulate dust under rain, resulting in reduced power generation efficiency of the photovoltaic panel and increased risks of hot spots and glass corrosion.

[0048] Furthermore, if Figure 2 The photovoltaic module frame shown is designed without an upper surface and does not cover the laminate. When the module is a double-glass module, the double-layer glass is prone to misalignment after lamination, which can easily lead to a small contact area between the frame and the glass, causing the risk of explosion. In addition, when the frame does not cover the laminate, it is only bonded to the laminate through silicone, and its load resistance is greatly reduced.

[0049] In order to overcome the above-mentioned defects in the prior art, the present invention provides a photovoltaic module, which is used to prevent dust accumulation and reduce the probability of glass explosion in the assembly frame, thereby improving the overall performance and reliability of the photovoltaic module.

[0050] Please refer to Figures 3A to 3B and Figure 4 , Figure 3A A schematic cross-sectional structure diagram of a photovoltaic module provided according to some embodiments of the present invention is shown. Figure 3B A schematic diagram of the 3D structure of a photovoltaic module provided according to some embodiments of the present invention is shown. Figure 4 A schematic structural diagram of a laminate provided according to some embodiments of the present invention is shown.

[0051] like Figures 3A to 3B As shown, the photovoltaic module includes a frame 10 and a laminate 20. The frame 10 includes a support portion 101 and a stop portion 102. The stop portion 102 is located on the support portion 101 and is bent toward the laminate 20 to cooperate with the support portion 101 to form a mounting groove 103 for clamping the laminate 20.

[0052] In some embodiments, the support portion 101 may include a corrugated rib area 1011 for buffering the laminate 20 on the support portion 101 to enhance the overall stability of the frame 10 structure.

[0053] As Figure 4 shown, the laminate 20 includes a front glass 201, a cell layer 202, and a back glass 203. The size of the back glass 203 is larger than that of the front glass 201, and its thickness is less than the height of the mounting groove 103 so as to extend into the mounting groove 103. In this way, the frame 10 forms a covering for the back glass 203 of the laminate 20, enabling the component to have better load-bearing capacity and effectively reducing the probability of glass breakage.

[0054] Furthermore, the total thickness of the laminate 20 is not greater than the sum of the height of the mounting groove 103 and the thickness of the limiting portion 102. Thereby, the dust deposited on the front glass 201 can be easily washed away by rainwater, thus achieving the effect of preventing dust accumulation.

[0055] In some embodiments, the first surface of the limiting portion 102 facing the front glass 201 abuts against the edge of the front glass 201, thereby preventing dust from entering the gap between the limiting portion 102 and the front glass 201, further enhancing the effect of preventing dust accumulation.

[0056] Furthermore, at the contact edge between the limiting portion and the front glass, a sealing operation can also be performed. For example, a layer of high-performance sealant is coated. This sealant has excellent adhesiveness and elasticity and can quickly cure at room temperature to form a continuous and uniform sealing barrier.

[0057] In some embodiments, the front glass 201 and / or the back glass 203 is made of tempered glass. For example: float glass or embossed glass.

[0058] In some embodiments, the photovoltaic module can design the dimensions of the structure. Specifically, the length of the support surface of the support portion 101 can be set to 7 - 12 mm, the height of the mounting groove 103 can be set to 3 - 6 mm, the thickness of the laminate 20 can be set to 3.8 - 6.2 mm, and the difference in the unilateral size between the back glass 203 and the front glass 201 can be 3 - 9 mm. Through the mutual cooperation of these dimensions, the structural strength of the photovoltaic module can be enhanced.

[0059] The cell layer 202 further includes an encapsulation adhesive film, the material of which is at least one of EVA, POE, PVB, and TPU, for bonding the cell layer 202 between the front glass 201 and the back glass 203.

[0060] Please refer to Figures 5 to 7 , Figure 5 which shows a schematic structural diagram of the adhesive inside the mounting groove provided by some embodiments of the present invention.Figure 6 The structural schematic diagram of the adhesive during the process of inserting the back glass into the installation groove according to some embodiments of the present invention is shown. Figure 7 The structural schematic diagram of the adhesive after inserting the back glass into the installation groove according to some embodiments of the present invention is shown.

[0061] As Figures 5 to 7 shown, the installation groove 103 clamps the back glass 203 via the adhesive. A diversion line 1031 is provided on the third surface below the limiting portion 102, which is used to divert the adhesive when the back glass 203 is inserted into the installation groove 103, so that the glue is evenly distributed in the installation groove 103.

[0062] Furthermore, at least one concave glue overflow groove 1032 is also provided on the third surface below the limiting portion 102, which is used to increase the bonding strength between the frame 10 and the laminate 20.

[0063] Please refer to Figure 8 , Figure 8 The installation structural schematic diagram of the first corner code according to some embodiments of the present invention is shown.

[0064] As Figure 8 shown, both ends of the frame 10 have cut surfaces with a preset angle (for example: it can be 45 degrees), and adjacent frames 10 are abutted via the cut surfaces. Based on this, the frame 10 further includes: a first corner code 30, which covers the connection part of adjacent frames 10 and is used to reinforce the connection strength of the connection part of adjacent frames 10.

[0065] In some embodiments, the preset angle can also be set in cooperation with the shape of the laminate 20. For example, when the laminate 20 is a polygon, the cut surface angles at both ends of the frame 10 change accordingly.

[0066] Please refer to Figure 9 , Figure 9 The installation structural schematic diagram of the second corner code according to some embodiments of the present invention is shown.

[0067] As Figure 9 shown, the support portion 101 further includes a corner code socket. The frame 10 further includes: a second corner code 40, which is inserted into the corner code socket of adjacent frames 10 and is used to reinforce the connection strength of the connection part of adjacent frames 10.

[0068] In summary, for the photovoltaic module provided by the present invention, the size of the back glass of the laminate is larger than that of the front glass, and the total thickness of the laminate is not greater than the sum of the height of the installation groove and the thickness of the limiting portion. Such a structural setting can prevent dust accumulation while reducing the probability of the frame bursting the glass, thereby improving the overall performance and reliability of the photovoltaic module.

[0069] Although the foregoing methods have been illustrated and described as a series of acts for simplicity of explanation, it should be understood and appreciated that the methods are not limited by the order of acts, as some acts may occur in different orders and / or concurrently with other acts not illustrated and described herein or other acts that are understandable to those skilled in the art, in accordance with one or more embodiments.

[0070] The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A photovoltaic module, characterized in that: include: A frame, comprising a supporting portion and a limiting portion, wherein the limiting portion is located on the supporting portion and is bent toward the laminate to cooperate with the supporting portion to form a mounting groove for clamping the laminate; and The laminate comprises a front glass, a battery layer and a back glass, wherein the size of the back glass is larger than that of the front glass and its thickness is smaller than the height of the mounting groove so as to extend into the mounting groove, and the total thickness of the laminate is not greater than the sum of the height of the mounting groove and the thickness of the limiting portion.

2. The photovoltaic module according to claim 1, characterized in that: The limiting portion faces the first surface of the front glass and abuts against the edge of the front glass.

3. The photovoltaic module according to claim 1, characterized in that: The mounting groove clamps the back glass via an adhesive, and a guide line is provided on the third surface on the lower side of the limiting portion for guiding the adhesive when the back glass is inserted into the mounting groove.

4. The photovoltaic module according to claim 3, characterized in that: The third surface on the lower side of the limiting portion is also provided with at least one concave glue overflow groove for increasing the bonding strength between the frame and the laminate.

5. The photovoltaic module according to claim 1, characterized in that: The support portion includes a corrugated rib area for providing cushioning to the laminate on the support portion.

6. The photovoltaic module according to claim 1, characterized in that: The support surface length of the support portion is set to 7-12 mm, the height of the mounting groove is set to 3-6 mm, the thickness of the laminate is set to 3.8-6.2 mm, and the difference in single-side size between the back glass and the front glass is 3-9 mm.

7. The photovoltaic module according to claim 1, characterized in that: The front glass and / or the back glass are made of tempered glass.

8. The photovoltaic module according to claim 1, characterized in that: The battery layer also includes: The packaging film is made of at least one of EVA, POE, PVB and TPU and is used to bond the battery layer between the front glass and the back glass.

9. The photovoltaic module according to claim 1, characterized in that: Both ends of the frame have cut surfaces with preset angles, and adjacent frames are abutted via the cut surfaces. The frame further includes: The first corner code covers the connection between the adjacent frames and is used to strengthen the connection strength of the connection between the adjacent frames.

10. The photovoltaic module according to claim 9, characterized in that: The support portion further includes an angle code socket, and the frame further includes: The second corner code is inserted into the corner code socket of the adjacent frame to strengthen the connection strength of the connection between the adjacent frames.

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