PTFE photovoltaic packaging film structure
Through the ribbon body design made of PTFE material, the problem of water vapor intrusion at the edge of photovoltaic modules is solved, and the photovoltaic packaging effect with tight sealing and long-term stable performance is achieved.
Patent Information
- Application Number
- CN202422980551.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-05-08
- Filing Date
- 2024-12-04
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-12-04
AI Technical Summary
There are major channels for water vapor intrusion between the two glasses at the edge of the existing photovoltaic modules, and existing sealing materials cannot effectively block water vapor molecules.
A strip-shaped body made of PTFE material is designed into four strip-shaped parts. The sealing part is partially overlapped when folded into a square frame, and the first and second connecting parts and recessed parts are provided on the sealing part, combining the limiting part and the folding line, and tight sealing is achieved by frame extrusion.
It achieves a good sealing effect on the edge of the photovoltaic module, prevents water vapor molecules from entering, and the material has excellent chemical inertia, corrosion resistance and thermal stability, adapts to complex environments and maintains long-term sealing performance.
Smart Images
Figure CN223157531U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of encapsulation, and particularly relates to a PTFE photovoltaic encapsulation film structure. Background Art
[0002] With the wide application of double-glass modules, moisture barrier of the front plate and the back plate is no longer a problem. However, between the two pieces of glass at the edge of the module, it has become the main channel for water vapor intrusion; the commonly used aluminum frame and silicone seal of crystalline silicon modules can block liquid water, but they are far from meeting the requirements for water vapor molecules. Summary of the Invention
[0003] The purpose of the utility model is to provide a PTFE photovoltaic encapsulation film structure with good sealing effect for the existing problems in the prior art.
[0004] The purpose of the utility model can be realized by the following technical solutions:
[0005] A PTFE photovoltaic encapsulation film structure includes: a strip-shaped body made of PTFE material. The strip-shaped body includes four continuous strip-shaped parts. On the width direction of the strip-shaped body, sealing parts are arranged on both sides of each strip-shaped part. When the four strip-shaped parts enclose a square frame structure and two adjacent strip-shaped parts are folded at a right angle, the sealing parts on two adjacent strip-shaped bodies at least partially overlap.
[0006] In the above PTFE photovoltaic encapsulation film structure, at both ends of the length of each sealing part, the sealing part has a first connecting part and a second connecting part. The sum of the thickness of the first connecting part and the thickness of the second connecting part is equal to the thickness of the sealing part. When two adjacent sealing parts partially overlap, the first connecting part is connected to the second connecting part.
[0007] In the above PTFE photovoltaic encapsulation film structure, on one side surface of the sealing part, the first connecting part is provided with a first recessed part, and on the other side surface of the sealing part, the second connecting part is provided with a second recessed part corresponding to the first recessed part.
[0008] In the above PTFE photovoltaic encapsulation film structure, one end of the strip-shaped body has a limiting part.
[0009] In the above PTFE photovoltaic encapsulation film structure, a plurality of first folding lines are formed on the strip-shaped body, and one first folding line is arranged between each adjacent strip-shaped parts.
[0010] In the above PTFE photovoltaic encapsulation film structure, second folding lines are arranged between the strip-shaped parts and the sealing parts.
[0011] Compared with the prior art, the present application has the following advantages:
[0012] In the present application, first, the strip-shaped body is wrapped around the outer edge of the photovoltaic panel body without the frame installed. Then, the frame can be installed on the photovoltaic panel body. During the installation process, when two adjacent sealing parts at the corner position of the photovoltaic panel body partially overlap, the extrusion of the frame tightly seals the sealing parts, preventing the entry of water vapor molecules. The remaining positions are completely sealed by the continuous strip-shaped body. Finally, only some silicone rubber is added at the connection position to achieve a good sealing effect. Description of the Drawings
[0013] Figure 1 is an unfolded schematic diagram in the present application;
[0014] Figure 2 is a three-dimensional structure diagram of the present application folded into a frame structure;
[0015] Figure 3 is in Figure 2 Based on this, a three-dimensional structure diagram of one of the sealing parts opened;
[0016] Figure 4 is Figure 3 a partial enlarged view in.
[0017] In the figure,
[0018] 2. Strip-shaped body; 21. Strip portion; 211. Sealing portion; 2111. First connecting portion; 21111. First recessed portion; 2112. Second connecting portion; 21121. Second recessed portion; 212. Limiting portion; 213. First folding line; 214. Second folding line. Detailed Embodiments
[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0020] As Figures 1 to 4 shown, a PTFE photovoltaic encapsulation film structure includes: a strip-shaped body 2 made of PTEE material. The strip-shaped body 2 includes four continuous strip portions 21. On both sides of each strip portion 21 in the width direction of the strip-shaped body 2, there are provided sealing portions 211. Among them, when the four strip portions 21 are surrounded into a square frame structure and two adjacent strip portions 21 are folded at a right angle, the sealing portions 211 on two adjacent strip-shaped bodies overlap at least partially.
[0021] In this application, first, the strip-shaped body 2 is wrapped around the outer edge of the photovoltaic panel body without a frame installed. Then, the frame can be installed on the photovoltaic panel body. During the installation process, when two adjacent sealing parts 211 at the corner position of the photovoltaic panel body partially overlap, the extrusion of the frame tightly seals the sealing parts 211 to prevent the entry of water vapor molecules. The remaining positions are completely sealed by the continuous strip-shaped body 2. Finally, just supplement some silicone rubber at the connection position to achieve a good sealing effect.
[0022] Moreover, this application is made of PTEE material. PTEE has excellent chemical inertness and can resist the erosion of various chemical substances such as acids, alkalis, and solvents, showing good corrosion resistance. Moreover, it has good mechanical properties, including high strength, high toughness, and excellent wear resistance, and has good aging resistance, and can maintain its performance for a long time without being affected by the external environment. PTEE shows excellent thermal stability, can maintain its physical properties within a wide temperature range, can usually withstand temperatures up to 260 °C, and PTEE is an excellent electrical insulating material. It can perfectly adapt to the complex external environmental conditions of the photovoltaic panel, and the PTEE material itself has a certain elasticity. After being squeezed by the frame on the glass, it can perfectly fit and play a sealing role.
[0023] Specifically, at both ends of the length of each sealing part 211, the sealing part 211 has a first connecting part 2111 and a second connecting part 2112. Among them, the sum of the thickness of the first connecting part 2111 and the thickness of the second connecting part 2112 is equal to the thickness of the sealing part 211. When two adjacent sealing parts 211 partially overlap, the first connecting part 2111 is connected to the second connecting part 2112.
[0024] This design can ensure that after the two sealing parts 211 overlap, their thickness will not exceed the thickness of a single sealing part 211. Thus, after connection, a better sealing can be achieved. The design of the first connecting part 2111 and the second connecting part 2112 enables the sealing part 211 to be more tightly connected when adjacent parts overlap, effectively enhancing the sealing performance of the sealing part 211 and reducing the possibility of water vapor molecule penetration.
[0025] Specifically, on one side surface of the sealing part 211, the first connecting part 2111 is provided with a first recess 21111, and on the other side surface of the sealing part 211, the second connecting part 2112 is provided with a second recess 21121 corresponding to the first recess 21111. This design enables the first connecting part 2111 and the second connecting part 2112 to be fitted together.
[0026] Specifically, one end of the strip-shaped body 2 has a limiting part 212.
[0027] Through the limiting part 212, after surrounding the outer periphery of the photovoltaic panel, it can be connected to the strip-shaped body 2. After installing the frame, this part will also be squeezed, so as to achieve better sealing. After surrounding, a complete frame can basically be formed, reducing the possibility of water vapor molecules penetrating.
[0028] Specifically, a plurality of first folding lines 213 are formed on the strip-shaped body 2, and a first folding line 213 is provided between each adjacent strip part 21.
[0029] The setting of the first folding line 213 can facilitate and accurately install the folding.
[0030] Specifically, a second folding line 214 is provided between the strip part 21 and the sealing part 211.
[0031] The setting of the second folding line 214 can facilitate and accurately install the folding.
[0032] It should be noted that all the directional indications in the embodiments of the present invention, such as up, down, left, right, front, back..., are only used to explain the relative positional relationship and movement conditions between the components in a certain specific posture, as shown in the drawings. If this specific posture changes, then the directional indication will also change accordingly.
[0033] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. At the same time, the meaning of "and / or" appearing throughout the text is that it includes three solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement it. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.
[0034] The above components are all common standard components or components known to those skilled in the art, and their structures and principles can all be known to those skilled in the art through technical manuals or through conventional experimental methods.
[0035] The specific embodiments described herein are only examples of the spirit of the present utility model. Those skilled in the art of the present utility model can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.
Claims
1. A PTFE photovoltaic encapsulation film structure, comprising: A strip-shaped body (2) made of PTFE material, the strip-shaped body (2) includes four continuous strip-shaped portions (21), and on both sides of each strip-shaped portion (21) in the width direction of the strip-shaped body (2), there are provided sealing portions (211). Among them, when the four strip-shaped portions (21) are formed into a square frame structure and two adjacent strip-shaped portions (21) are folded at a right angle, the sealing portions (211) on two adjacent strip-shaped bodies at least partially overlap.
2. The PTFE photovoltaic encapsulation film structure according to claim 1, wherein, At both ends of the length of each sealing portion (211), the sealing portion (211) has a first connecting portion (2111) and a second connecting portion (2112). Among them, the sum of the thickness of the first connecting portion (2111) and the thickness of the second connecting portion (2112) is equal to the thickness of the sealing portion (211). When two adjacent sealing portions (211) partially overlap, the first connecting portion (2111) is connected to the second connecting portion (2112).
3. The PTFE photovoltaic encapsulation film structure according to claim 2, wherein, On one side surface of the sealing portion (211), the first connecting portion (2111) is provided with a first recessed portion (21111). On the other side surface of the sealing portion (211), the second connecting portion (2112) is provided with a second recessed portion (21121) corresponding to the first recessed portion (21111).
4. The PTFE photovoltaic encapsulation film structure according to claim 1, characterized in that, One end of the strip-shaped body (2) has a limiting portion (212).
5. The PTFE photovoltaic encapsulation film structure according to claim 1, characterized in that, A plurality of first folding lines (213) are provided on the strip-shaped body (2), and one first folding line (213) is provided between each adjacent strip-shaped portion (21).
6. The PTFE photovoltaic encapsulation film structure according to claim 1, characterized in that, A second folding line (214) is provided between the strip-shaped portion (21) and the sealing portion (211).