CN210692556U - A high and low temperature resistant long-life solar photovoltaic backplane - Google Patents

Abstract

The utility model discloses a high-low temperature resistant and long-life solar photovoltaic backplane, which belongs to the technical field of solar photovoltaic backplanes. The surface of the PET base material is fixedly connected with a heat sink and there are multiple heat sinks, the top of the heat sink is fixedly connected with heat-dissipating silicone rubber, the bottom of the modified PET base material is detachably connected with a metal plate, and the surface of the metal plate is bonded There is a waterproof layer, and the waterproof layer includes a hydrophobic membrane a, a breathable membrane and a hydrophobic membrane b. The heat dissipation silicone rubber, the heat sink and the heat dissipation film cooperate with each other to dissipate heat, which can avoid the damage of the solar cell caused by the high temperature; the hydrophobic film in the waterproof layer can block the water vapor and prevent the water vapor from entering the solar cell and rusting the components.

Description

A high and low temperature resistant long-life solar photovoltaic backplane

technical field

The utility model relates to the technical field of solar photovoltaic backplanes, in particular to a high and low temperature resistant and long-life solar photovoltaic backplane.

Background technique

The solar back sheet is located on the back of the solar panel, which protects and supports the cells, and has reliable insulation, water resistance and aging resistance. The initial solar back sheet has a three-layer structure (PVDF/PET/PVDF), the outer protective layer PVDF has good environmental erosion resistance, the middle layer is PET polyester film with good insulation properties, and the inner layer PVDF and EVA have good resistance. adhesive properties. Later, in order to reduce costs and consider environmental protection, some fluorine-free backplane structures appeared, such as APE structure backplanes.

Patent No. CN 109849445 A discloses a solar back sheet, the weather-resistant adhesive layer and/or the weather-resistant layer is added with coloring substances (dyes, pigments or fillers, etc.) Various colors, such as yellow, red, etc., meet the appearance requirements of different colors; the weather-resistant adhesive layer ensures good adhesion between the back sheet and the EVA used for photovoltaic module packaging, and meets the back sheet's requirements for corrosion resistance and insulation performance; The weather-resistant layer has good barrier and UV resistance, which improves the weathering resistance of photovoltaic modules.

The solar photovoltaic backplane of the prior art has the following disadvantages: 1. After the solar photovoltaic backplane is adhered to the solar cell, the solar cell absorbs the sunlight and releases heat during the conversion process, and the backplane dissipates heat slowly and the temperature is high and the internal structure of the solar cell is easily damaged; 2. The air enters the solar cell from the backplane, and the moisture in the air causes the internal parts of the solar energy to rust. For this reason, we propose a high-low temperature and long-life solar photovoltaic backplane.

Utility model content

The utility model provides a solar photovoltaic backplane with high and low temperature resistance and long life. The heat-dissipating silicone rubber, the heat-dissipating fin and the heat-dissipating film cooperate with each other to dissipate heat, which can avoid the damage of the solar cell caused by the high temperature; the hydrophobic film in the waterproof layer can block water vapor, Avoid water vapor entering the solar cell and rusting components.

The concrete technical scheme that the utility model provides is as follows:

The utility model provides a solar photovoltaic backplane with high and low temperature resistance and long life, comprising a modified PET base material, the surface of the modified PET base material is bonded with a heat dissipation film, and the surface of the modified PET base material is fixedly connected with a heat dissipation film The top of the heat sink is fixedly connected with heat-dissipating silicone rubber, the bottom of the modified PET base material is detachably connected with a metal plate, the surface of the metal plate is bonded with a waterproof layer, and the waterproof layer Including hydrophobic membrane a, breathable membrane and hydrophobic membrane b.

Optionally, the surface of the metal plate is provided with grooves and there are multiple grooves.

Optionally, a hydrophobic film a is adhered to the surface of the metal plate, and a breathable film is adhered to the outer surface of the hydrophobic film a.

Optionally, a hydrophobic film b is adhered to the outside of the breathable film.

The beneficial effects of the present utility model are as follows:

The embodiment of the present utility model provides a solar photovoltaic backplane with high and low temperature resistance and long life:

1. The heat dissipation silicone rubber, heat sink and heat dissipation film cooperate with each other to dissipate heat, which can avoid the damage of solar cells caused by excessive temperature; After absorbing heat, it is transferred down to the heat sink, the heat sink is in contact with the heat dissipation film, most of the heat on the heat sink is in contact with the air and then transferred to the air for heat dissipation, and a small part is transferred to the heat dissipation film for heat dissipation through the heat dissipation film, heat dissipation silicone rubber, heat sink It cooperates with the heat dissipation film to quickly dissipate heat from the solar panel.

2. The hydrophobic film in the waterproof layer can block water vapor and prevent the water vapor from entering the solar cell and rusting the components. The waterproof layer is composed of a hydrophobic film a, a breathable film and a hydrophobic film b. The air carrying moisture contacts the waterproof layer, and the air passes through the hydrophobic film. And the breathable film advances into the photovoltaic backplane, and the water forms a large contact angle on the surface of the hydrophobic film b to form a water droplet, which is directed downward through the grooves on the metal plate, which can prevent moisture from entering the photovoltaic backplane and the solar panel. Contact causes rust and other adverse effects, prolonging the service life.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a schematic diagram of the overall structure of a solar photovoltaic backplane with high and low temperature resistance and long life according to an embodiment of the present utility model;

FIG. 2 is a schematic structural diagram of a waterproof layer of a solar photovoltaic backplane with high and low temperature resistance and long life according to an embodiment of the present invention.

In the figure: 1. Heat-dissipating silicone rubber; 2. Heat sink; 3. Heat-dissipating film; 4. Modified PET substrate; 5. Metal plate; 6. Waterproof layer; 7. Groove; 8. Hydrophobic film a; 9. Breathable membrane; 10. Hydrophobic membrane b.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

A solar photovoltaic backplane with high and low temperature resistance and long life according to an embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 2 .

Referring to FIG. 1 and FIG. 2 , a solar photovoltaic backplane with high and low temperature resistance and long life provided by the embodiment of the present invention includes a modified PET substrate 4, and a heat dissipation film is adhered to the surface of the modified PET substrate 4. 3. The surface of the modified PET base material 4 is fixedly connected with a heat sink 2 and there are multiple heat sinks 2, the top of the heat sink 2 is fixedly connected with a heat dissipation silicone rubber 1, and the bottom of the modified PET base material 4 is detachable A metal plate 5 is connected, and a waterproof layer 6 is adhered to the surface of the metal plate 5. The waterproof layer 6 includes a hydrophobic film a8, a breathable film 9 and a hydrophobic film b10.

For example, the heat dissipation film 3 is a heat dissipation film made of nano-carbon material. The heat dissipation power of the nano-carbon is 1000-6000. The processing process is very simple and the cost is not high. The modified PET base material 4 is made of modified PET material. Modified The PET substrate 4 plays a supporting role, can withstand high and low temperatures, has stable mechanical properties, excellent electrical insulation, good friction resistance and dimensional stability, and the heat sink 2 can absorb heat and dissipate heat through the air.

Referring to FIG. 2 , grooves 7 are formed on the surface of the metal plate 5 and there are multiple grooves 7 .

Illustratively, the connection between the grooves 7 formed on the surface of the metal plate 5 can guide the flow of water on the waterproof layer 6 .

Referring to FIG. 2 , a hydrophobic film a8 is adhered to the surface of the metal plate 5 , and a breathable film 9 is adhered to the outer surface of the hydrophobic film a8 .

Illustratively, water will form a large contact angle on the surface of the hydrophobic film a8 to form a water droplet.

Referring to FIG. 2 , a hydrophobic film b10 is adhered to the outside of the breathable film 9 .

Exemplarily, air can be exchanged through the breathable membrane 9, and the hydrophobic membrane b10 can prevent moisture from passing through.

When in use, install the photovoltaic backplane on the back of the solar panel. After installation, the solar cell absorbs sunlight and converts it into electrical energy. During the conversion process, the electronic components work to generate a lot of heat, and the heat is transferred from the solar panel to the photovoltaic backplane, which is close to the solar energy. The heat dissipation silicone rubber 1 of the solar panel absorbs heat and transfers it to the heat sink 2. Part of the heat on the heat sink 2 continues to be transferred downward to the heat dissipation film 3 for heat dissipation. Most of the heat is transferred to the air for heat dissipation during the contact between the heat sink 2 and the air. It can quickly dissipate heat. When the water in the air passes through the waterproof layer 6, it will be condensed into a group by the action of the hydrophobic film b10 and the hydrophobic film a8 in the waterproof layer 6 and move down along the groove 7. The model of the hydrophobic film b10 and the hydrophobic film a8 is MC52104. Water erosion can be avoided.

It should be noted that the utility model is a solar photovoltaic backplane with high and low temperature resistance and long life, including 1. heat-dissipating silicone rubber; 2. heat-dissipating fins; 3. heat-dissipating film; 4. modified PET base material; 5. metal plate 6. Waterproof layer; 7. Groove; 8. Hydrophobic membrane a; 9. Breathable membrane; 10. Hydrophobic membrane b, the components are general standard parts or components known to those skilled in the art, and their structures and principles are the same It can be known by technical personnel through technical manuals or through routine experimental methods.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if these modifications and variations of the embodiments of the present utility model fall within the scope of the claims of the present utility model and their equivalents, the present utility model is also intended to include these modifications and variations.

Claims (4)

1. A high and low temperature resistant long-life solar photovoltaic backplane, comprising a modified PET base material (4), characterized in that the modified PET base material (4) surface is bonded with a heat dissipation film (3), and the The surface of the modified PET base material (4) is fixedly connected with a heat sink (2) and there are a plurality of heat sinks (2), the top of the heat sink (2) is fixedly connected with heat dissipation silicone rubber (1), A metal plate (5) is detachably connected to the bottom of the base material (4), a waterproof layer (6) is adhered to the surface of the metal plate (5), and the waterproof layer (6) includes a hydrophobic membrane a (8), a breathable membrane (9) and the hydrophobic membrane b (10). 2 . The solar photovoltaic backplane with high and low temperature resistance and long life according to claim 1 , wherein grooves ( 7 ) are formed on the surface of the metal plate ( 5 ) and there are multiple grooves ( 7 ). 3 . 3. The high and low temperature resistant and long-life solar photovoltaic backplane according to claim 1, wherein a hydrophobic film a (8) is adhered to the surface of the metal plate (5), and the hydrophobic film a (8) ) outer surface is bonded with a breathable film (9). 4 . The solar photovoltaic backplane with high and low temperature resistance and long life according to claim 1 , wherein a hydrophobic film b ( 10 ) is adhered to the outside of the breathable film ( 9 ). 5 .

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