Corrosion-resistant photovoltaic adhesive film

Abstract

The utility model relates to the field of photovoltaic adhesive films, in particular to a corrosion-resistant photovoltaic adhesive film. The corrosion-resistant photovoltaic adhesive film comprises an adhesive film outer protective layer, a corrosion-resistant layer, a heat-insulating layer, a light-transmitting layer, an anti-static layer and a bonding layer, an anti-corrosion layer is arranged at the bottom of the adhesive film outer protection layer, a heat insulation layer is arranged at the bottom of the anti-corrosion layer, a light-transmitting layer is arranged at the bottom of the heat insulation layer, an anti-static layer is arranged at the bottom of the light-transmitting layer, and a bonding layer is arranged at the bottom of the anti-static layer. The adhesive film outer protection layer, the anti-corrosion layer, the heat insulation layer, the light-transmitting layer, the anti-static layer and the bonding layer are laminated into a whole, and the layer thickness ratio of the adhesive film outer protection layer to the light-transmitting layer is 1: (4-7). The photovoltaic adhesive film has the advantages of high corrosion resistance, high anti-corrosion effect, high light transmission performance and aging resistance.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic adhesive films, in particular to a corrosion-resistant photovoltaic adhesive film. Background Art

[0002] Photovoltaic film is mainly used for the encapsulation of solar cell modules to protect the modules from damage by external environmental factors. Photovoltaic film seals the photovoltaic cells, isolates them from external air and moisture, and protects the cells from environmental factors such as moisture, oxygen, dust, etc., which helps to extend the service life of photovoltaic modules and maintain their stable performance output.

[0003] Nowadays, there are anti-corrosion photovoltaic films on the market. These anti-corrosion photovoltaic films can resist the corrosion of photovoltaic modules in harsh environments such as acid rain and salt spray. This anti-corrosion performance ensures that photovoltaic modules can operate in highly corrosive areas such as the seaside and desert, reducing the performance degradation and failure rate of photovoltaic modules caused by film corrosion.

[0004] Nowadays, acid rain has a great impact on solar panels. Acid rain can cause corrosion on the surface of solar panels, causing the operation of solar panels to be hindered. The existing photovoltaic films with anti-corrosion function also have a short anti-corrosion effect. As time goes by, the anti-corrosion layer on the photovoltaic film gradually weakens. Therefore, some manufacturers will make the anti-corrosion layer thicker, which weakens the light transmission performance of the photovoltaic film and reduces the light conversion efficiency of the photovoltaic module. At the same time, the anti-corrosion photovoltaic film will cause the anti-corrosion layer on the film to be heated under external high temperature conditions, which will weaken the anti-corrosion ability of the anti-corrosion layer and cause damage to the photovoltaic module.

[0005] Therefore, it is particularly important to design a photovoltaic film that has strong corrosion resistance, strong anti-corrosion effect, good light transmittance and strong anti-aging ability. Utility Model Content

[0006] The present application provides a corrosion-resistant photovoltaic film, which adopts the following technical solution:

[0007] A corrosion-resistant photovoltaic film comprises an outer protective layer, an anti-corrosion layer, a heat-insulating layer, a light-transmitting layer, an antistatic layer and an adhesive layer; an anti-corrosion layer is arranged at the bottom of the outer protective layer of the film, a heat-insulating layer is arranged at the bottom of the anti-corrosion layer, a light-transmitting layer is arranged at the bottom of the heat-insulating layer, an anti-static layer is arranged at the bottom of the light-transmitting layer, and an adhesive layer is arranged at the bottom of the anti-static layer; the outer protective layer, the anti-corrosion layer, the heat-insulating layer, the light-transmitting layer, the antistatic layer and the adhesive layer are laminated and pressed into one body, and the thickness ratio of the outer protective layer to the light-transmitting layer is 1:4-7.

[0008] Optionally, the outer protective layer of the film is made of PVDF material.

[0009] Optionally, the outer protective layer of the adhesive film has a thickness of 50-60 microns.

[0010] Optionally, the anti-corrosion layer uses polyester film as a main material, and a silicon dioxide coating is applied on the polyester film.

[0011] Optionally, the anti-corrosion layer has a layer thickness of 35-40 microns.

[0012] Optionally, the thermal insulation layer has a layer thickness of 50-60 microns.

[0013] Optionally, the light-transmitting layer is made of EVA film.

[0014] Optionally, the light-transmitting layer has a layer thickness of 200-350 microns.

[0015] Optionally, the antistatic layer has a thickness of 30-40 microns.

[0016] Optionally, the adhesive layer has a thickness of 40-45 microns

[0017] Compared with the prior art, the beneficial effect of the utility model is that the double-layer protection of the outer protective layer and the anti-corrosion layer of the film can prevent the photovoltaic film from being affected by the external environment. At the same time, a silicon dioxide coating is also provided on the anti-corrosion layer, which can reflect ultraviolet rays in sunlight and prevent the influence of ultraviolet rays on photovoltaic modules.

[0018] The light-transmitting layer can transmit light, allowing the light to illuminate the photovoltaic modules to generate electricity. The light-transmitting layer can transmit a large amount of light to improve the luminous efficiency of the photovoltaic modules.

[0019] The thermal insulation layer can alleviate the heat transfer from sunlight to the solar panels and prevent the heat from the outside from affecting the solar panels. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the drawings are only some embodiments of the utility model. For ordinary technicians in this field, other embodiments and their drawings can be obtained based on the embodiments shown in these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the corrosion-resistant photovoltaic film of the utility model.

[0022] In the figure: 1-film outer protective layer, 2-anti-corrosion layer, 3-heat insulation layer, 4-light-transmitting layer, 5-antistatic layer, 6-adhesive layer. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the various embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The embodiment of the utility model provides a corrosion-resistant photovoltaic adhesive film.

[0027] Embodiment 1: A corrosion-resistant photovoltaic adhesive film, comprising an adhesive film outer protective layer 1, an anticorrosion layer 2, a heat insulation layer 3, a light-transmitting layer 4, an antistatic layer 5 and an adhesive layer 6; the adhesive film outer protective layer 1 is provided with an anticorrosion layer 2 at the bottom, the anticorrosion layer 2 is provided with a heat insulation layer 3 at the bottom, the heat insulation layer 3 is provided with a light-transmitting layer 4 at the bottom, the light-transmitting layer 4 is provided with an antistatic layer 5 at the bottom, and the antistatic layer 5 is provided with an adhesive layer 6 at the bottom. The adhesive film outer protective layer 1, the anticorrosion layer 2, the heat insulation layer 3, the light-transmitting layer 4, the antistatic layer 5 and the adhesive layer 6 are laminated to form an integrated photovoltaic adhesive film. The layer thickness ratio of the adhesive film outer protective layer 1 and the light-transmitting layer 4 is 1:4-7.

[0028] The outer protective layer 1 of the film is made of PVDF (polyvinylidene fluoride), which has excellent weather resistance and chemical corrosion resistance, and can effectively resist the erosion of photovoltaic modules by factors such as light, heat, and humidity in the outdoor environment. The outer protective layer 1 of the film can also block water vapor, preventing water vapor from passing through the photovoltaic film into the photovoltaic module and affecting the operation of the photovoltaic module. At the same time, the outer protective layer 1 of the film can effectively avoid damage to the photovoltaic module during transportation and installation, such as scratching the surface of the photovoltaic film. The outer protective layer 1 of the film can effectively protect the photovoltaic module from corrosion in acid rain and other situations. The thickness of the outer protective layer 1 of the film is 50-60 microns, preferably 55 microns.

[0029] The anti-corrosion layer 2 and the outer protective layer 1 of the film both play an anti-corrosion role and protect the photovoltaic modules from interference and influence of the external environment. The anti-corrosion layer 2 uses polyester film as the main material, and a silicon dioxide coating is applied on the polyester film. After nano-treatment, the granular matter of the silicon dioxide coating can improve the durability, hardness and optical transmittance of the coating. At the same time, the anti-corrosion layer 2 can effectively reflect the ultraviolet rays of sunlight to avoid the influence of ultraviolet rays on photovoltaic modules. The anti-corrosion layer 2 and the outer protective layer 1 of the film can protect the photovoltaic modules from extreme environments such as acid rain. The thickness of the anti-corrosion layer 2 and the anti-corrosion layer 2 is 35-40 microns. The outer protective layer 1 of the film and the anti-corrosion layer 2 have good waterproof properties. In the case of acid rain, rainwater can be prevented from penetrating into the photovoltaic film to affect the photovoltaic modules.

[0030] The heat insulation layer 3 is mainly used to reduce the heat generated by the light radiation on the surface of the solar panel, and can also prevent the heat from the outside from affecting the solar panel. By adopting certain heat insulation measures, the time that heat stays on the surface of the photovoltaic panel can be shortened, thereby reducing the heat lost by the photovoltaic conversion efficiency, and thus improving the efficiency of power output. The heat insulation layer 3 is made of foamed polyethylene, which is a foamed material produced from polyethylene. It has the advantages of low thermal conductivity, moisture resistance, waterproofness, shock resistance, and aging resistance. The thickness of the heat insulation layer 3 is 50-60 microns, preferably 55 microns.

[0031] The function of the light-transmitting layer 4 is to effectively transmit sunlight through the photovoltaic film to the photovoltaic module. The light-transmitting layer 4 is not only a channel for light to enter, but also protects the photovoltaic module from the influence of the external environment. The light-transmitting layer 4 can effectively prevent dust, moisture and other pollutants from invading the photovoltaic module. The light-transmitting layer 4 adopts EVA film (ethylene-vinyl acetate copolymer). In the photovoltaic film, the light-transmitting layer 4 needs to have a high light transmittance to ensure the effective transmission of solar radiation. The light transmittance in the wavelength range of 380 to 1100nm needs to be greater than 90%, and the average value can reach more than 92%. The light transmittance of the EVA film in the range of 290 to 380nm is less than 30%, and the average is 23.17%, 25.22% and 22.35%. Such a design can make more ultraviolet light reflect and not enter the module, thereby better protecting the battery cell and extending the service life of the photovoltaic module. The light transmittance of the EVA film at 380nm is greater than 90%, which helps the ultraviolet light to better penetrate and be transmitted to the battery cell, thereby improving the power generation efficiency of the battery cell. The thickness of the light-transmitting layer 4 is 200-350 micrometers, preferably 300 micrometers.

[0032] The antistatic layer 5 can protect the battery cell from the influence of static electricity, and can eliminate or reduce the static electricity generated by the photovoltaic module during the manufacturing, transportation and use process. The existence of static electricity can damage the battery cell and affect its performance and life. The antistatic layer 5 is added with a conductive polymer to form an antistatic layer, which improves the reliability and stability of the photovoltaic module. The conductive polymer on the antistatic layer 5 can be polyaniline or polypyrrole, and the thickness of the antistatic layer 5 is 30-40 microns.

[0033] The adhesive layer 6 is made of EVA (ethylene-vinyl acetate copolymer) resin. The EVA resin is mixed with a cross-linking agent, a silane coupling agent and other modifiers in a mixer, and then mixed in a closed container and left to stand for a period of time. The mixture is then placed in a film production line and made into a molten film through a cast extrusion process. After the molten film is cooled by multiple cooling rollers, it is trimmed and rolled. The adhesive layer 6 can firmly adhere the photovoltaic film to the surface of the solar cell module to maintain the integrity and stability of the solar cell module. The thickness of the adhesive layer 6 is 40-45 microns.

[0034] This photovoltaic film can effectively protect photovoltaic modules from corrosion caused by acid rain in extreme conditions. It also has strong anti-aging properties and can protect photovoltaic modules from external corrosion in a variety of harsh environments.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view. The scope of the present invention is defined by the appended claims, rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A corrosion-resistant photovoltaic film, characterized in that: The adhesive film comprises an outer protective layer (1), an anticorrosion layer (2), a heat insulating layer (3), a light-transmitting layer (4), an antistatic layer (5) and an adhesive layer (6); the anticorrosion layer (2) is arranged at the bottom of the outer protective layer (1), the heat insulating layer (3) is arranged at the bottom of the anticorrosion layer (2), the light-transmitting layer (4) is arranged at the bottom of the heat insulating layer (3), the antistatic layer (5) is arranged at the bottom of the light-transmitting layer (4), and the adhesive layer (6) is arranged at the bottom of the antistatic layer (5); the outer protective layer (1), the anticorrosion layer (2), the heat insulating layer (3), the light-transmitting layer (4), the antistatic layer (5) and the adhesive layer (6) are laminated to form an integral body, and the layer thickness ratio of the outer protective layer (1) to the light-transmitting layer (4) is 1:4-7.

2. The corrosion-resistant photovoltaic adhesive film according to claim 1, characterized in that: The outer protective layer (1) of the adhesive film is made of PVDF material.

3. The corrosion-resistant photovoltaic adhesive film according to claim 1, characterized in that: The thickness of the outer protective layer (1) of the adhesive film is 50-60 microns.

4. The corrosion-resistant photovoltaic adhesive film according to claim 1, characterized in that: The anti-corrosion layer (2) uses a polyester film as a main material, and a silicon dioxide coating is applied on the polyester film.

5. The corrosion-resistant photovoltaic adhesive film according to claim 1, characterized in that: The thickness of the anti-corrosion layer (2) is 35-40 microns.

6. The corrosion-resistant photovoltaic adhesive film according to claim 1, characterized in that: The thickness of the heat insulation layer (3) is 50-60 microns.

7. The corrosion-resistant photovoltaic adhesive film according to claim 1, characterized in that: The light-transmitting layer (4) is made of EVA film.

8. The corrosion-resistant photovoltaic adhesive film according to claim 1, characterized in that: The thickness of the light-transmitting layer (4) is 200-350 microns.

9. The corrosion-resistant photovoltaic adhesive film according to claim 1, characterized in that: The antistatic layer (5) has a thickness of 30-40 microns.

10. The corrosion-resistant photovoltaic adhesive film according to claim 1, characterized in that: The thickness of the adhesive layer (6) is 40-45 microns.

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