Photovoltaic module reflective film capable of avoiding material blocking and material breaking

Abstract

The utility model relates to a photovoltaic module reflective film capable of avoiding material blocking and material breaking, which is composed of a bonding layer, a base material layer and a microstructure layer which are sequentially connected from inside to outside, the outer side of the microstructure layer is a convex surface layer, and the joint of the photovoltaic module reflective film capable of avoiding material blocking and material breaking is formed by splicing a left reflective film and a right reflective film; a left notch is formed in the upper end of the joint of the left reflective film, so that a left convex block is formed at the lower end of the joint; a right notch consistent with the left bump in shape is formed in the lower end of the joint of the right reflective film, so that a convex right bump consistent with the left notch in shape is formed at the upper end of the joint; the left protruding block is clamped and attached to the right notch. The right protruding block is clamped and attached to the left notch. According to the utility model, parts of the upper layer and the lower layer of the two reflective film bands are utilized, the bonding is firm, and the thickness is basically not increased or is increased by less than 10%, so that the problems of material blocking and material breaking in the film pasting process are avoided, and the risk of subfissure of a battery piece is also avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic components, in particular to a photovoltaic component reflective film which can avoid material jamming and breaking. Background Art

[0002] Photovoltaic modules are assembled by encapsulating solar cells with front glass, upper and lower encapsulation films, back glass, silicone, and frame materials. Applying reflective film between strings or cells in a photovoltaic module can fully utilize the sunlight in the gaps. Alternatively, applying reflective film to the surface of the soldering ribbon can increase sunlight utilization.

[0003] However, during the production process of reflective film, the substrate film may have different lengths or be produced abnormally, resulting in joints in the reflective film. Alternatively, during the film application stage of the photovoltaic module production process, the reflective film may not be laid exactly to the full module gap length, resulting in joints between cell strings, between cells, or during the film application process.

[0004] like Figure 4 As shown, the current common practice is to apply double-sided tape or UV-resistant double-sided tape to the upper or lower surface, or both sides, of the reflective film joint. However, the thickness of this joint is much thicker than that of normal film tape (over 50%), which may lead to two risks: first, the uneven thickness of the reflective film may cause material jamming and breakage during the film application process; second, it increases the risk of hidden cracks in the solar cells, further leading to module failure. Utility Model Content

[0005] In order to solve the technical problems in the background technology, the utility model discloses a photovoltaic component reflective film which can avoid material jamming and breaking.

[0006] The utility model provides a photovoltaic module reflective film that can prevent material jamming and breaking. The reflective film is composed of an adhesive layer, a base material layer, and a microstructure layer that are sequentially connected from the inside to the outside. The outer side of the microstructure layer is a raised surface layer. The connection of the photovoltaic module reflective film that can prevent material jamming and breaking is composed of a left reflective film and a right reflective film spliced ​​together.

[0007] A left notch is provided at the upper end of the left reflective film connection, so that a raised left bump is formed at the lower end of the connection;

[0008] A right notch having the same shape as the left convex block is provided at the lower end of the right reflective film connection, so that a raised right convex block having the same shape as the left notch is formed at the upper end of the connection;

[0009] The left protrusion is snap-fitted and fits the right notch; the right protrusion is snap-fitted and fits the left notch.

[0010] The utility model utilizes respective parts of the upper layer and the lower layer of two sections of reflective film tapes, which are firmly bonded and the thickness basically does not increase, or increases by less than 10%. This avoids the problems of material jamming and breaking during the film application process, avoids the risk of hidden cracks in the battery cells, and improves the reliability of the UV resistance and aging resistance of the finished reflective film assembly.

[0011] The width of the left and right bumps directly affects the connection strength of the film tape. Based on this, the further design is: the left bump is composed of an adhesive layer; the right bump is composed of a base material layer, a microstructure layer and a surface layer.

[0012] In order to achieve uniform force after the left reflective film and the right reflective film are connected, a further design is that the lengths of the left and right convex blocks are the same.

[0013] If the connection between the left and right reflective films is too short, the connection strength will be affected; if it is too long, the connection will be more difficult. Based on this, further improvements are made in that the length of the left and right protrusions is 5-10 cm.

[0014] The fracture positions of the left and right notches directly affect the structural accuracy of the connection between the left and right reflective films. Based on this, further improvements are as follows: the shape of the surface layer is a plurality of triangles connected in sequence; the inner end of the left notch is located at the connection of the two triangles; the inner end of the right notch is directly opposite the connection of the two triangles.

[0015] The left and right reflective sheets can be attached in two ways: First, apply UV-resistant liquid glue to the upper end of the left or lower end of the right bump. The UV-resistant liquid glue can be any of acrylic quick-drying glue, epoxy glue, UV glue, or silicone glue. Second, attach UV-resistant double-sided tape to the upper end of the left or lower end of the right bump. The UV-resistant double-sided tape can be any of acrylic pressure-sensitive adhesive, silicone pressure-sensitive adhesive, or polyurethane pressure-sensitive adhesive.

[0016] The beneficial effects of the present invention are as follows: the present invention utilizes respective parts of the upper layer and the lower layer of the two sections of reflective film tapes, which are firmly bonded, and the thickness is basically not increased, or the increase is less than 10%, thereby avoiding the problems of material jamming and breaking during the film lamination process, and also avoiding the risk of hidden cracks in the battery cell, and also improving the reliability of the UV resistance and aging resistance of the finished reflective film assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a structural diagram of the left reflective film and the right reflective film before splicing;

[0019] Figure 2 This is a schematic diagram of the structure after the left reflective film and the right reflective film are spliced ​​together;

[0020] Figure 3 It is a structural diagram of the reflective film;

[0021] Figure 4 This is a schematic diagram of the structure completed by splicing the traditional left reflective film and the right reflective film.

[0022] In the figure: 1, bonding layer; 2, substrate layer; 3, microstructure layer; 4, surface layer; 5, left reflective film; 6, right reflective film; 51, left notch; 52, left bump; 61, right notch; 62, right bump. DETAILED DESCRIPTION

[0023] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0024] The utility model is a photovoltaic component reflective film that avoids material jamming and breaking. Figure 3 As shown, the adhesive layer 1, the substrate layer 2 and the microstructure layer 3 are sequentially connected in a stacked manner from the inside to the outside, and the outer side of the microstructure layer 3 is a raised surface layer 4, wherein the surface layer 4 is shaped like a plurality of triangles connected in sequence.

[0025] like Figure 1 As shown, the spliced ​​reflective sheeting is composed of a left reflective sheeting 5 and a right reflective sheeting 6; the upper end of the connection of the left reflective sheeting 5 is provided with a left notch 51, so that the lower end of this connection forms a raised left bump 52; the lower end of the connection of the right reflective sheeting 6 is provided with a right notch 61 with the same shape as the left bump 52, so that the upper end of this connection forms a raised right bump 62 with the same shape as the left notch 51. Figure 2 As shown, when splicing, the left protrusion 52 is engaged and fits the right notch 61; the right protrusion 62 is engaged and fits the left notch 51, and the joint forms a Z-shape. The left protrusion 52 and the right protrusion 62 are the same length, so that the left reflective film 5 and the right reflective film 6 are evenly stressed after being connected.

[0026] The length of the left protrusion 52 and the right protrusion 62 is 5-10 cm. This setting can avoid the connection between the left reflective film 5 and the right reflective film 6 being too short, affecting the connection strength; and avoid the connection between the left reflective film 5 and the right reflective film 6 being too long, increasing the difficulty of connection.

[0027] The left protrusion 52 is composed of the adhesive layer 1, while the right protrusion 62 is composed of the base material layer 2, the microstructure layer 3, and the surface layer 4. Because the combined thickness of the base material layer 2 and the microstructure layer 3 is close to that of the adhesive layer 1, the incision in the left reflective sheeting 5 removes the base material layer 2 and the microstructure layer 3, while the incision in the right reflective sheeting 6 removes the adhesive layer 1. This improves the strength of the reflective sheeting after splicing. The inner end of the left notch 51 is located at the junction of the two triangles; the inner end of the right notch 61 faces the junction of the two triangles. This improves the structural accuracy of the junction between the left and right reflective sheets 5 and 6.

[0028] The left and right reflective sheets 5 and 6 can be connected in two ways. First, the upper end of the left protrusion 52 or the lower end of the right protrusion 62 is coated with UV-resistant liquid glue. The UV-resistant liquid glue can be any of acrylic quick-drying glue, epoxy glue, UV glue, or silicone glue. Second, the upper end of the left protrusion 52 or the lower end of the right protrusion 62 is affixed with UV-resistant double-sided tape. The UV-resistant double-sided tape can be any of acrylic pressure-sensitive adhesive, silicone pressure-sensitive adhesive, or polyurethane pressure-sensitive adhesive.

[0029] The utility model utilizes respective parts of the upper layer and the lower layer of two sections of reflective film tapes, which are firmly bonded and the thickness basically does not increase, or increases by less than 10%. This avoids the problems of material jamming and breaking during the film application process, avoids the risk of hidden cracks in the battery cells, and improves the reliability of the UV resistance and aging resistance of the finished reflective film assembly.

[0030] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A photovoltaic module reflective film for preventing material jamming and breaking, comprising an adhesive layer (1), a substrate layer (2), and a microstructure layer (3) connected sequentially from the inside to the outside, wherein the outer side of the microstructure layer (3) is a raised surface layer (4), characterized in that: The connection of the photovoltaic component reflective film for preventing material jamming and breaking is composed of a left reflective film (5) and a right reflective film (6) spliced ​​together; A left notch (51) is provided at the upper end of the connection of the left reflective film (5), so that a raised left bump (52) is formed at the lower end of the connection; The lower end of the connection of the right reflective film (6) is provided with a right notch (61) having the same shape as the left convex block (52), so that the upper end of the connection forms a raised right convex block (62) having the same shape as the left notch (51); The left protrusion (52) is engaged with and fits the right notch (61); the right protrusion (62) is engaged with and fits the left notch (51).

2. The photovoltaic module reflective sheeting for preventing material jamming and breaking according to claim 1, characterized in that: The left protrusion (52) is composed of an adhesive layer (1); The right convex block (62) is composed of a base material layer (2), a microstructure layer (3) and a surface layer (4).

3. The photovoltaic module reflective sheeting for preventing material jamming and breaking according to claim 2, characterized in that: The left protrusion (52) and the right protrusion (62) have the same length.

4. The photovoltaic module reflective sheeting for preventing material jamming and breaking according to claim 3, characterized in that: The lengths of the left convex block (52) and the right convex block (62) are 5-10 cm.

5. The photovoltaic module reflective sheeting for preventing material jamming and breaking according to claim 4, characterized in that: The surface layer (4) is in the shape of a plurality of triangles connected in sequence; The inner end of the left notch (51) is located at the connection of the two triangles; The inner end of the right notch (61) faces the connection point of the two triangles.

6. The photovoltaic module reflective sheeting for preventing material jamming and breaking according to claim 5, characterized in that: The upper end of the left convex block (52) or the lower end of the right convex block (62) is smeared with anti-ultraviolet liquid glue.

7. The photovoltaic module reflective sheeting for preventing material jamming and breaking according to claim 6, characterized in that: The anti-ultraviolet liquid glue is any one of acrylic quick-drying glue, epoxy glue, UV glue, and organic silica gel.

8. The photovoltaic module reflective sheeting for preventing material jamming and breaking according to claim 5, characterized in that: The upper end of the left convex block (52) or the lower end of the right convex block (62) is adhered with an anti-ultraviolet double-sided tape.

9. The photovoltaic module reflective sheeting for preventing material jamming and breaking according to claim 8, characterized in that: The anti-ultraviolet double-sided adhesive tape is any one of acrylic pressure-sensitive adhesive, silicone pressure-sensitive adhesive and polyurethane pressure-sensitive adhesive.

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