Ultraviolet-irradiation-resistant high-efficiency photovoltaic module

Abstract

An ultraviolet-irradiation-resistant high-efficiency photovoltaic module belongs to the technical field of photovoltaic equipment, solves the technical problem of insufficient light conversion efficiency of photovoltaic modules, and adopts the technical scheme that two groups of photovoltaic modules are symmetrically arranged on the surfaces of the upper side and the lower side of a battery piece, and the two groups of photovoltaic modules and the battery piece are packaged into a whole; a nano-metal low-radiation film, a photovoltaic glass plate, a one-way light-transmitting film, a composite light conversion adhesive film (including a lower conversion adhesive film and an upper conversion adhesive film), an ultraviolet scattering film, an infrared shielding adhesive film and an ultraviolet cut-off film are sequentially arranged in each group of photovoltaic modules in an overlapping manner from the surface layer to the inner layer. The solar cell module not only can protect the cell from being irradiated by infrared rays and ultraviolet rays and prolong the service life of the cell, but also can prolong the propagation path of the ultraviolet rays and the infrared rays in the module, reduce light loss, prevent the light conversion efficiency from being reduced due to temperature rise and improve the power generation efficiency.

Description

TECHNICAL FIELD

[0001] The utility model belongs to photovoltaic equipment technical field, specifically relates to a kind of high-efficiency photovoltaic module resistant to ultraviolet irradiation. BACKGROUND

[0002] Photovoltaic module is irradiated by ultraviolet in long-term use process outdoors, leading to its encapsulation material, cell piece and other components accelerated aging, performance decline, affect service life.Currently on the market although some ultraviolet photovoltaic modules, but generally there is not ideal and other problems such as ultraviolet resistance effect.For example, part of the component adopts special light conversion agent to enhance ultraviolet resistance, however, inorganic light conversion agent and organic film are not compatible, difficult to distribute evenly in film, which not only leads to film transparency decline, also affects light conversion efficiency;In addition, due to uneven distribution of light conversion agent in film, the absorption and conversion capacity of different regions of film is uneven, some regions have strong capacity, some regions are weak, in absorption and conversion capacity weak area, ultraviolet is more likely to penetrate film, and then cause damage to cell piece and polymer backsheet.

[0003] In order to solve the above problems, part of photovoltaic module will be used UV cut film to absorb ultraviolet that penetrates light conversion film when using light conversion film, although this can prevent ultraviolet from causing damage to subsequent components, but also means that this part of ultraviolet that is not converted into visible light cannot be used for power generation, thereby causing power generation efficiency to decrease.

[0004] In addition, infrared band in sunlight can cause component temperature to rise, and then cause light conversion agent to experience "thermal quenching" phenomenon under sunlight irradiation, and infrared band light also cannot be absorbed by photovoltaic module, leading to power generation capacity of photovoltaic module to decrease.Therefore, an improved technical solution is needed to solve the above problems of prior art. UTILITY MODEL CONTENT

[0005] The main purpose of the utility model is to overcome the deficiencies in the prior art, and the utility model provides a kind of high-efficiency photovoltaic module resistant to ultraviolet irradiation, solve the technical problems of light conversion efficiency in prior art.

[0006] The utility model is implemented by the following technical solutions: a kind of high-efficiency photovoltaic module resistant to ultraviolet irradiation, it includes photovoltaic module and cell piece, wherein, two groups of photovoltaic module are symmetrically arranged on the upper and lower two side surfaces of cell piece, and two groups of photovoltaic module and cell piece are packaged into an organic whole;Wherein, each group of photovoltaic module is sequentially overlapped from surface layer to inner layer:

[0007] The photovoltaic glass plate is provided with a nano-metal low-radiation film on the outer side of the photovoltaic glass plate, the nano-metal low-radiation film can realize the characteristics of high transmission of visible light and high reflection of medium and far infrared rays, reduce the temperature of the composite light conversion film, and prevent the light conversion efficiency from being reduced due to the temperature rise; the inner side of the composite photovoltaic glass plate is provided with a one-way light transmission film, the one-way light transmission film can make the light entering the photovoltaic assembly internally reflect multiple times, increase the contact opportunity of the light and the photovoltaic material, so that more light is effectively converted into electric energy, thereby improving the power generation efficiency and reducing the loss of light energy.

[0008] The composite light conversion film is stacked below the composite photovoltaic glass plate, and the composite light conversion film includes a lower conversion film stacked on the upper side and an upper conversion film stacked on the lower side; first, visible light can smoothly pass through the composite light conversion film; second, ultraviolet light can be converted into visible light after passing through the lower conversion film for power generation; at the same time, infrared light can be converted into visible light after passing through the upper conversion film, thereby increasing the power generation efficiency and reducing the temperature of the assembly.

[0009] The ultraviolet scattering film is stacked below the composite light conversion film; the ultraviolet scattering film can scatter the ultraviolet light that passes through the composite light conversion film back to the composite light conversion film, realize secondary conversion, and further improve the power generation efficiency.

[0010] The infrared shielding film is stacked below the ultraviolet scattering film; the infrared shielding film can shield infrared rays to avoid the temperature of the battery sheet being increased by the infrared rays, while maintaining a high visible light transmittance.

[0011] The ultraviolet cutoff film is stacked below the infrared shielding film; the ultraviolet cutoff film can absorb ultraviolet rays to reduce the damage of the ultraviolet rays to the battery sheet, while maintaining a high visible light transmittance.

[0012] Further, the nano-metal low-radiation film is a silver-based nano film.

[0013] Further, the base layer of the one-way light transmission film is a polyethylene terephthalate (PET) layer with a light trapping effect microstructure.

[0014] Further, the lower conversion film contains a lower conversion luminescent material, and the upper conversion film contains an upper conversion luminescent material.

[0015] Down-Conversion Luminescent Materials is a kind of functional material that can convert high-energy photons into low-energy photons, its core feature is to absorb short-wavelength light and emit long-wavelength light, and it has important applications in the fields of lighting display, biological imaging, solar cells, anti-counterfeiting technology, etc. Up-Conversion Luminescent Materials is a kind of functional material that can convert low-energy photons into high-energy photons, its core feature is to absorb long-wavelength light and emit short-wavelength light, which violates the traditional Stokes law, so it is also called "anti-Stokes luminescent material", and this kind of material has unique application value in the fields of biological imaging, laser technology, anti-counterfeiting markers, solar cells, etc.

[0016] Further, the ultraviolet scattering film contains TiO2 nanoparticles, and the TiO2 particle size is 100-120 nm.

[0017] The beneficial effects of the utility model lie in:

[0018] 1), the nano metal low-emissivity film can reduce the entry of infrared rays, reduce the temperature of the composite light conversion adhesive film, and prevent the decrease of light conversion efficiency caused by temperature rise. The one-way light transmission film not only will not hinder the penetration of external sunlight, but also can guide the light scattered by the composite light conversion adhesive film and the ultraviolet scattering film back into the component interior, prolong the propagation path of the light in the component interior, and reduce the light loss.

[0019] 2), the use of composite light conversion adhesive film can simultaneously improve the conversion rate of ultraviolet and infrared, while ensuring the smooth arrival of visible light to the battery piece;

[0020] 3), the ultraviolet scattering film is used to scatter part of the ultraviolet that has not been fully converted back to the composite light conversion adhesive film, so as to realize the re-conversion of ultraviolet to visible light, thereby improving the power generation efficiency;

[0021] 4), the infrared shielding adhesive film and the ultraviolet cutoff film can shield the unconverted infrared and ultraviolet, avoiding the damage to the component. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a longitudinal section structure schematic diagram of the utility model; the arrow in the figure represents the light beam propagation path, and the hollow circle represents the light exchange position.

[0023] In the figure: 1, photovoltaic glass plate; 1-1, nano metal low-emissivity film; 1-2, one-way light transmission film; 2, composite light conversion adhesive film; 2-1, down-conversion adhesive film; 2-2, up-conversion adhesive film; 3, ultraviolet scattering film; 4, infrared shielding adhesive film; 5, ultraviolet cutoff film; 6, battery piece. DETAILED DESCRIPTION

[0024] The utility model will be described in further detail below in combination with the drawings and examples.

[0025] As Figure 1 The utility model discloses a kind of high-efficiency photovoltaic modules resistant to ultraviolet light irradiation, it includes photovoltaic module and cell piece 6, it is characterized in that, two groups of the photovoltaic module is symmetrically arranged on the upper and lower two side surfaces of cell piece 6, two groups of photovoltaic module and cell piece 6 are packaged into an organic whole;Wherein, from surface layer to inner layer, each group of photovoltaic module is sequentially overlapped and arranged:

[0026] Photovoltaic glass plate 1, nanometer metal low-emissivity film 1-1 is arranged on the outer side of photovoltaic glass plate 1, one-way light transmission film 1-2 is arranged on the inner side of composite photovoltaic glass plate 1;

[0027] Composite light conversion adhesive film 2, composite light conversion adhesive film 2 is stacked below composite photovoltaic glass plate 1, and composite light conversion adhesive film 2 includes lower conversion adhesive film 2-1 stacked on the upper side and upper conversion adhesive film 2-2 stacked on the lower side;

[0028] Ultraviolet scattering film 3, ultraviolet scattering film 3 is stacked below composite light conversion adhesive film 2;

[0029] Infrared shielding adhesive film 4, infrared shielding adhesive film 4 is stacked below ultraviolet scattering film 3;

[0030] Ultraviolet cut-off film 5, ultraviolet cut-off film 5 is stacked below infrared shielding adhesive film 4.

[0031] Further, the nanometer metal low-emissivity film 1-1 is silver-based nanometer film.

[0032] Further, the base layer of one-way light transmission film 1-2 is polyethylene terephthalate layer with light trapping effect microstructure.

[0033] Further, the lower conversion adhesive film 2-1 contains lower conversion luminescent material, and the upper conversion adhesive film 2-2 contains upper conversion luminescent material.

[0034] Further, the ultraviolet scattering film 3 contains TiO2 nanoparticles, and the particle size of TiO2 is 100-120nm.

[0035] In the utility model, the paths of visible light, infrared rays and ultraviolet rays passing through the high-efficiency photovoltaic module are as follows:

[0036] 1, visible light: visible light penetrates the high-efficiency photovoltaic module and directly irradiates on cell piece 6, to realize light energy conversion into electric energy;

[0037] 2、Infrared rays: first, most of the infrared rays are reflected by the nano metal low-emissivity film 1-1 to the outside of the high-efficiency photovoltaic module, and the remaining infrared rays pass through the nano metal low-emissivity film 1-1, the photovoltaic glass plate 1, the one-way light transmission film 1-2 and the down-conversion adhesive film 2-1 in turn, and then are shot into the up-conversion adhesive film 2-2, the up-conversion adhesive film 2-2 converts part of the shot infrared rays into visible light, and the visible light can penetrate the module and directly irradiate on the battery piece 6; part of the infrared rays which are not converted pass through the up-conversion adhesive film 2-2 and the ultraviolet scattering film 3 and are shielded by the infrared shielding adhesive film 4. Therefore, in the utility model, the infrared rays are converted, the utilization rate of the infrared rays is improved, and more importantly, the battery piece 6 is protected from the excessive heat generated by the irradiation of the infrared rays.

[0038] 3、Ultraviolet rays: first, most of the ultraviolet rays can smoothly penetrate the nano metal low-emissivity film 1-1, the photovoltaic glass plate 1 and the one-way light transmission film 1-2, when passing through the down-conversion adhesive film 2-1, the down-conversion adhesive film 2-1 converts part of the shot ultraviolet rays into visible light, and the visible light can penetrate the module and directly irradiate on the battery piece 6; part of the ultraviolet rays which are not converted pass through the up-conversion adhesive film 2-2 and are scattered by the ultraviolet scattering film 3, the ultraviolet rays which are not scattered pass through the ultraviolet scattering film 3 and the infrared shielding adhesive film 4 in turn and are shielded by the ultraviolet cut-off film 5, the scattered ultraviolet light passes through the up-conversion adhesive film 2-2 and is shot into the down-conversion adhesive film 2-1, and the down-conversion adhesive film 2-1 converts the scattered ultraviolet light into visible light, and the visible light is directly irradiated on the battery piece 6 after being reflected by the one-way light transmission film 1-2. Therefore, in the utility model, the ultraviolet rays are converted at least twice, the utilization rate of the ultraviolet rays is improved, and the battery piece 6 is protected from the irradiation of the ultraviolet rays.

[0039] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A high efficiency photovoltaic module resistant to ultraviolet irradiation, comprising a photovoltaic module and a cell (6), characterized in that, The two groups of photovoltaic assemblies are symmetrically arranged on the upper and lower surfaces of the cell sheet (6), and the two groups of photovoltaic assemblies are packaged with the cell sheet (6) as a whole; wherein each group of photovoltaic assemblies comprises, from the surface layer to the inner layer, a first photovoltaic assembly (1-1), a second photovoltaic assembly (1-2), a third photovoltaic assembly (1-3), and a fourth photovoltaic assembly (1-4) arranged in sequence. The photovoltaic glass plate (1) is provided with a nano-metal low-emissivity film (1-1) on the outer side surface, and a one-way light transmission film (1-2) is arranged on the inner side surface of the composite photovoltaic glass plate (1). The composite light conversion adhesive film (2) is stacked below the composite photovoltaic glass plate (1), and the composite light conversion adhesive film (2) comprises a lower conversion adhesive film (2-1) stacked on the upper side and an upper conversion adhesive film (2-2) stacked on the lower side. The ultraviolet scattering film (3) is stacked below the composite light conversion adhesive film (2). The infrared shielding adhesive film (4) is stacked below the ultraviolet scattering film (3). The ultraviolet cutoff film (5) is stacked below the infrared shielding adhesive film (4).

2. The high efficiency photovoltaic module resistant to ultraviolet radiation according to claim 1, characterized in that, The nano-metal low-emissivity film (1-1) is a silver-based nano-film.

3. The high efficiency photovoltaic module resistant to ultraviolet radiation according to claim 1, characterized in that, The base layer of the one-way light transmission film (1-2) is a polyethylene terephthalate layer with light trapping effect microstructure.

4. The high efficiency photovoltaic module resistant to ultraviolet radiation according to claim 1, characterized in that, The lower conversion adhesive film (2-1) contains a lower conversion luminescent material, and the upper conversion adhesive film (2-2) contains an upper conversion luminescent material.

5. The high efficiency photovoltaic module resistant to ultraviolet radiation according to claim 1, characterized in that, The ultraviolet scattering film (3) contains TiO2 nanoparticles, and the TiO2 particle size is 100-120 nm.

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