Black multilayer photovoltaic module reflective film

Abstract

The utility model discloses a black multilayer photovoltaic module reflective film, which is used for shielding a welding strip between battery pieces and is attached between the battery pieces corresponding to the position of the welding strip. The reflective film comprises a base material layer, a white reflecting layer, a black infrared transmitting layer and a high-molecular elastomer layer which are sequentially arranged from top to bottom, and the high-molecular elastomer layer is attached to the battery piece. The black multi-layer photovoltaic module reflective film provided by the utility model has infrared transmission capability while shielding a welding strip between battery pieces, has excellent temperature resistance and insulation performance, and can improve the power generation power of a photovoltaic module.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic module technical field, especially in kind of black multilayer photovoltaic module reflection film. BACKGROUND

[0002] Photovoltaic module includes front plate, cell piece, back plate and encapsulation adhesive film, and the cell piece is connected in series through the welding band between the cell pieces, the welding band between the cell pieces of photovoltaic module, especially black photovoltaic module, in order to reach the requirement of beautiful, will adopt light shielding strip to shield the parts such as exposed busbar between the cell pieces, make it reach the color that is completely same with other cell parts.

[0003] In the prior art, the welding band position between the cell pieces is shielded by black polyimide film, but the insulation performance of the black polyimide film is greatly reduced due to the addition of carbon black. In addition, this kind of black film is completely light-absorbing, and light absorption can easily cause the temperature of the cell piece to rise, reduce the power generation efficiency, and also reduce the utilization rate of light. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, the purpose of the utility model is to provide a kind of black multilayer photovoltaic module reflection film, welding band between the cell pieces is shielded, and it also has infrared transmission capacity, and has excellent temperature resistance and insulation performance, which can improve the power generation power of photovoltaic module.

[0005] To achieve the above technical purpose and effect, the utility model realizes the following technical scheme:

[0006] A kind of black multilayer photovoltaic module reflection film is used to shield the welding band between the cell pieces, and the reflection film is attached between the cell pieces corresponding to the welding band position;The reflection film includes substrate layer, white reflective layer, black infrared transmission layer and high molecular elastomer layer arranged in turn from top to bottom;The high molecular elastomer layer is attached to the cell piece.

[0007] Further, the substrate layer is a black polyimide substrate layer, a black polyethylene terephthalate substrate layer or a black polyethylene naphthalate substrate layer.

[0008] Further, the white reflective layer is a white paint layer with reflective fillers added.

[0009] Further, the white reflective layer is one of an acrylic white paint layer, a polyurethane white paint layer, a fluorocarbon white paint layer, a polyester white paint layer and a silicone white paint layer.

[0010] Further, the black infrared transmission layer has a transmittance of >20% in the infrared waveband of 700-1200nm.

[0011] Further, the black infrared transmission layer is a black paint layer containing black infrared transmission organic pigment.

[0012] Further, the black infrared transmission layer is one of an acrylic black paint layer, a polyurethane black paint layer, a fluorocarbon black paint layer, a polyester black paint layer, and a silicone black paint layer.

[0013] Further, the high polymer elastomer layer is one of a thermoplastic polyurethane elastomer layer, a SEBS thermoplastic elastomer layer, an ethylene-acrylic acid copolymer elastomer layer, an ethylene-acrylic ester copolymer elastomer layer, an ethylene-vinyl acetate copolymer elastomer layer, and an ethylene-alpha olefin copolymer elastomer layer.

[0014] Further, the thickness of the substrate layer is 10-200 microns, the thickness of the white reflective layer is 1-30 microns, the thickness of the black infrared transmission layer is 1-20 microns, and the thickness of the high polymer elastomer layer is 10-150 microns.

[0015] The black multilayer photovoltaic module light reflection film has the advantages that:

[0016] The black multilayer photovoltaic module light reflection film has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 1 is a structural schematic view of the black multilayer photovoltaic module light reflection film of the utility model.

[0018] Figure 2 Fig. 2 is a structural schematic view of the black multilayer photovoltaic module light reflection film and the solder strip in the photovoltaic module.

[0019] In the figure, 10 is the black photovoltaic module light reflection film, 101 is the substrate layer, 102 is the white reflective layer, 103 is the black infrared transmission layer, and 104 is the high polymer elastomer layer; 20 is a front plate; 30 is a cell piece; and 40 is a solder strip. DETAILED DESCRIPTION

[0020] The advantages and features of the present application can be more easily understood by those skilled in the art from the preferred embodiments of the present application described below in conjunction with the accompanying drawings, so that the protection scope of the present application can be defined more clearly and explicitly.

[0021] In the description of the present application, it should be understood that the terms "front", "back", "left", "right", "up", "down" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0022] As shown in Figure 1 and Figure 2 A black multilayer photovoltaic module reflective film 10 for shielding the welding band 40 between the cell pieces 30, the reflective film is attached between the cell pieces corresponding to the welding band position, specifically, attached to the side of the cell piece away from the front plate of the photovoltaic module; the reflective film comprises a substrate layer 101, a white reflective layer 102, a black infrared transmission layer 103, and a polymer elastomer layer 104 arranged in turn from top to bottom; the polymer elastomer layer 104 is attached to the cell piece 30.

[0023] Among them, the substrate layer 101 is a black polyimide substrate layer, a black polyethylene terephthalate substrate layer or a black polyethylene terephthalate substrate layer.

[0024] The white reflective layer 102 is a white paint layer with reflective fillers. Preferably, the white reflective layer 102 is one of an acrylic white paint layer, a polyurethane white paint layer, a fluorocarbon white paint layer, a polyester white paint layer, and a silicone white paint layer. The reflective filler is selected from one or more of titanium dioxide, talc, calcium carbonate, magnesium carbonate, and barium sulfate.

[0025] The black infrared transmission layer 103 has a transmittance >20% in the infrared waveband 700-1200nm. The black infrared transmission layer 103 is a black paint layer containing black infrared transmission organic pigments. The black infrared transmission organic pigments are selected from one or more of perylene, phthalocyanine, fused ring ketone, azo, dioxazine, and heterocyclic organic pigments. The black infrared transmission layer 103 is preferably one of an acrylic black paint layer, a polyurethane black paint layer, a fluorocarbon black paint layer, a polyester black paint layer, and a silicone black paint layer.

[0026] The polymer elastomer layer 104 is one of the following: thermoplastic polyurethane elastomer layer, SEBS thermoplastic elastomer layer, ethylene-acrylic acid copolymer elastomer layer, ethylene-acrylate copolymer elastomer layer, ethylene-vinyl acetate copolymer elastomer layer, and ethylene-α-olefin copolymer elastomer layer.

[0027] The thickness of the substrate layer 101 is 10-200 μm, the thickness of the white reflective layer 102 is 1-30 μm, the thickness of the black infrared transmitting layer 103 is 1-20 μm, and the thickness of the polymer elastomer layer 104 is 10-150 μm.

[0028] Example 1

[0029] like Figure 1 As shown, the black multilayer photovoltaic module reflective film 10 is used to shield the solder strips 20 between the solar cells 30. The reflective film is attached between the solar cells at the corresponding solder strip positions. The reflective film includes a substrate layer 101, a white reflective layer 102, a black infrared transmitting layer 103, and a polymer elastomer layer 104 arranged sequentially from top to bottom. The polymer elastomer layer 104 is attached to the solar cells 30.

[0030] Wherein, the substrate layer 101 is a black polyimide substrate layer.

[0031] The white reflective layer 102 is a white coating layer with added reflective filler. In this embodiment 1, the white reflective layer 102 is a fluorocarbon white coating layer; the reflective filler is titanium dioxide.

[0032] The black infrared transmitting layer 103 has a transmittance of >20% in the infrared band 700-1200nm. The black infrared transmitting layer 103 is a black coating layer containing a black infrared transmitting organic pigment. In this embodiment 1, the black infrared transmitting organic pigment is a perylene-based organic pigment; the black infrared transmitting layer 103 is an acrylic black coating layer.

[0033] In this embodiment 1, the polymer elastomer layer 104 is a thermoplastic polyurethane elastomer layer.

[0034] In this embodiment 1, the thickness of the substrate layer 101 is 35 μm, the thickness of the white reflective layer 102 is 15 μm, the thickness of the black infrared transmitting layer 103 is 15 μm, and the thickness of the polymer elastomer layer 104 is 20 μm.

[0035] Example 2

[0036] like Figure 1As shown, the black multilayer photovoltaic module reflective film 10 is used to shield the solder ribbons 40 between the solar cells 30. The reflective film is attached between the solar cells at the corresponding solder ribbon positions. The reflective film includes a substrate layer 101, a white reflective layer 102, a black infrared transmitting layer 103, and a polymer elastomer layer 104 arranged sequentially from top to bottom. The polymer elastomer layer 104 is attached to the solar cells 30.

[0037] In this embodiment 2, the substrate layer 101 is a black polyethylene terephthalate substrate layer.

[0038] In this embodiment 2, the white reflective layer 102 is a fluorocarbon white coating layer with added reflective filler; the reflective filler is titanium dioxide.

[0039] The black infrared transmitting layer 103 has a transmittance of >20% in the infrared band 700-1200nm. The black infrared transmitting layer 103 is a black coating layer containing a black infrared transmitting organic pigment. In this embodiment 2, the black infrared transmitting organic pigment is a polycyclic ketone organic pigment; the black infrared transmitting layer 103 is a polyurethane black coating layer.

[0040] In this embodiment 2, the polymer elastomer layer 104 is a thermoplastic polyurethane elastomer layer.

[0041] In this embodiment 2, the thickness of the substrate layer 101 is 40 μm, the thickness of the white reflective layer 102 is 10 μm, the thickness of the black infrared transmitting layer 103 is 10 μm, and the thickness of the polymer elastomer layer 104 is 25 μm.

[0042] like Figure 2 As shown, in use, the black multilayer photovoltaic module reflective film 10 of this utility model is first attached between two solar cells 30, with the polymer elastomer layer 104 in contact with the solar cells 30, and then the solder ribbon 40 is welded between the solar cells 30; viewed from the front, the black photovoltaic module reflective film 10 blocks the solder ribbon 40; when light passes through the front panel 20 and is incident on the black multilayer photovoltaic module reflective film 10, the infrared light passes through the black infrared transmission layer 103 and is reflected by the white reflective layer 102. The reflected infrared light can be absorbed by the solar cells 30, improving the light utilization rate.

[0043] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the appended claims and not by the above description, which is therefore intended to be included within the present application insofar as it falls within the meaning and the scope of the equivalent elements of the claims.

[0044] Furthermore, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment exhibits every characteristic or implements every combination of features described in the specification. In other words, an embodiment can include only some of the features and examples described in the specification. Accordingly, the present specification embraces every different combination of the features described herein. Furthermore, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this manner only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

Claims

1. A black multilayer photovoltaic module reflective film, characterized by, The application discloses a reflective film for shielding welding ribbons between battery pieces, which is attached between the battery pieces corresponding to the positions of the welding ribbons; the reflective film comprises, from top to bottom, a substrate layer, a white reflective layer, a black infrared transmission layer and a polymer elastomer layer; and the polymer elastomer layer is attached to the battery pieces.

2. The black multilayer photovoltaic module reflector of claim 1, wherein, The substrate layer is a black polyimide substrate layer, a black polyethylene terephthalate substrate layer or a black polyethylene naphthalate substrate layer.

3. The black multilayer photovoltaic module reflector of claim 1, wherein, The black infrared transmission layer has a transmittance of more than 20% in an infrared wave band of 700-1200 nm.

4. The black multilayer photovoltaic module reflector of claim 1, wherein, The polymer elastomer layer is one of a thermoplastic polyurethane elastomer layer, a SEBS thermoplastic elastomer layer, an ethylene-acrylic acid copolymer elastomer layer, an ethylene-acrylic ester copolymer elastomer layer, an ethylene-vinyl acetate copolymer elastomer layer and an ethylene-alpha olefin copolymer elastomer layer.

5. The black multilayer photovoltaic module reflector of claim 1, wherein, The thickness of the substrate layer is 10-200 microns, the thickness of the white reflective layer is 1-30 microns, the thickness of the black infrared transmission layer is 1-20 microns, and the thickness of the polymer elastomer layer is 10-150 microns.

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