CN219800868U - Solar cell module - Google Patents
Solar cell module Download PDFInfo
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- CN219800868U CN219800868U CN202320555633.3U CN202320555633U CN219800868U CN 219800868 U CN219800868 U CN 219800868U CN 202320555633 U CN202320555633 U CN 202320555633U CN 219800868 U CN219800868 U CN 219800868U
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- Photovoltaic Devices (AREA)
Abstract
The utility model belongs to the field of solar cells, and provides a solar cell module, which comprises: the surface of the glass layer is provided with nano protrusions, and the transparent color film is covered on the surface of the nano protrusions; a polymer filling layer; battery tabs and polymeric back sheets. Thanks to the nano-protrusions, the solar cell module according to the present utility model has low reflectivity and a contamination prevention function, and thus can increase the photoelectric conversion rate of the solar cell module and extend the service life thereof. And the appearance color of the solar cell module can be more accurately adjusted thanks to the transparent color film.
Description
Technical Field
The utility model belongs to the field of solar cells, and particularly relates to a solar cell module.
Background
The glass layer of the solar cell module is a protective layer of the solar cell module. Solar cell modules generally include active solar cell elements made of monocrystalline silicon. Active solar cell elements used in this type of assembly are very sensitive to mechanical shock. Accordingly, EVA is filled between the glass layer and the solar cell element and the glass plate to protect the solar cell. The apparent color of prior art solar modules is typically adjusted by the cooperation of the glass structure and the color of the EVA layer, even with the cell sheets. As in the prior art, organic alkoxide-tetraethoxysilane and ethanol are used as solvents, hydrochloric acid (ph=1) is used as a catalyst, biological dyeing is used as a color developing agent, and a color film is formed on the outer surface of the glass layer, however, the color adjustment is not accurate enough by the method, and even color uncertainty is caused.
In addition, in order to improve the photoelectric conversion rate of the solar cell module, the glass layer should have a low reflectivity, thereby reducing optical loss due to reflection of glass. However, the antireflective effect of the glass layers currently on the market is also unsatisfactory. Finally, the hydrophobicity and the stain resistance of the solar cell module are also to be improved.
Disclosure of Invention
The present utility model provides a solar cell module including:
the surface of the glass layer is provided with nano protrusions, and the transparent color film is covered on the surface of the nano protrusions;
a polymer filling layer;
a battery sheet; and
a polymeric backsheet.
Still further, the nano-projections have a height between 1nm and 300 nm.
Still further, the nano-projections are composed of a plurality of cone-shaped projections, and a pitch between ends of each cone-shaped projection is between 30nm and 1000 nm.
Still further, the transparent color film has a thickness of between 1nm and 10 nm.
Still further, the transparent color film is made of a metal alloy.
Still further, the transparent color film exhibits red, green, or blue.
Still further, the polymer filler layer is made of EVA.
Further, the battery piece is a back contact battery.
Further, the back contact battery is any one of an IBC battery, a HJT battery, a TOPCon battery and a PERC battery.
Still further, the polymeric backsheet has at least one layer, and the polymeric backsheet is made of PPH or/and TPT.
Thanks to the nano-protrusions, the solar cell module according to the present utility model has low reflectivity and a contamination prevention function, and thus can increase the photoelectric conversion rate of the solar cell module and extend the service life thereof. And the appearance color of the solar cell module can be more accurately adjusted thanks to the transparent color film.
Drawings
Fig. 1 is a cross-sectional view of a solar cell module according to the present utility model.
Fig. 2 is an enlarged view of a glass layer of a solar cell module according to the present utility model.
Fig. 3 is a schematic view of nano-protrusions of a solar cell module according to the present utility model.
Description of main reference numerals: a glass layer 10, nano-protrusions 11, a transparent color film 12, a polymer filling layer 3, a battery piece 4, a first polymer back plate 5 and a second polymer back plate 6.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Example 1
As shown in fig. 1, the present embodiment provides a solar cell module including:
a glass layer 10, the surface of which is provided with nano-projections 11. The presence of the nano-protrusions 11 gives the surface of the glass layer characteristics of high transmittance, low reflectance and high hydrophobicity. Specifically, the nano-protrusions 11 form a black silicon-like structure on the surface of the glass, which can reduce reflection of light and thus increase transmittance of light. Furthermore, the nano-projections 11 can also form a hydrophobic surface. This is advantageous for solar cell modules that are exposed outdoors for a long period of time, since the hydrophobic surface allows the water droplets to slide smoothly. The nano-protrusions thus enhance the anti-fouling performance of the solar cell module.
And the surface of the nano-protrusion 11 is covered with a transparent color film 12. The transparent color film 12 can impart an apparent color to the solar cell module. The transparent color film 12 is also capable of filtering light of a particular wavelength range.
A polymer filling layer 3 for protecting the solar cell.
-a battery plate 4; and
polymer backings 5, 6.
Thanks to the nano-protrusions, the solar cell module according to the present utility model has low reflectivity and a contamination prevention function, and thus can increase the photoelectric conversion rate of the solar cell module and extend the service life thereof. And the appearance color of the solar cell module can be more accurately adjusted thanks to the transparent color film.
Example two
On the basis of the first embodiment, this embodiment further includes the following designs:
as shown in fig. 2, the height b of the nano-protrusions is between 1nm and 300 nm. The design can capture almost all sunlight, such as light absorbing sponge, and visible light and infrared rays can be absorbed.
In the prior art, black silicon is formed by coating a silicon dioxide coating layer on the surface of a silicon wafer, wherein the coating layer is provided with granular nano-scale protrusions. Unlike black silicon, etching is performed on the surface of glass to form cone-shaped nano-particles according to the present utility model. The glass with nano-protrusions according to the present utility model is manufactured at a lower cost compared to black silicon.
Example III
On the basis of the first embodiment, this embodiment further includes the following designs:
as shown in fig. 2, the nano-protrusions are composed of a plurality of cone-shaped protrusions, and a space a between ends of each cone-shaped protrusion is between 30nm and 1000 nm.
It will be appreciated that the glass surface may be etched using any of the techniques known in the art to form nano-projections.
For example, in the first step, silicon or silicon oxide particles may be deposited on the glass surface by any one of sputtering, plasma Enhanced Chemical Vapor Deposition (PECVD), electron beam evaporation or thermal evaporation.
In a second step, the metal can be etched by ion etching, reactive ion etching, ion milling or electric spark machining(EDM) and the like. The selective etching in the second step may be a plasma etching process using a reactive gas, and the reactive gas may be selected from CF 4 、CHF 3 、C 2 F 6 、C 2 Cl 2 F 4 、C 3 F 8 、C 4 F 8 、SF 6 Or a combination thereof.
The plasma etching may be performed at a plasma acceleration voltage in a range of-100 Vb to-1000 Vb and a plasma etching pressure in a range of 1Pa to 10 Pa. And the processing time of the ion body etching is between a few minutes and tens of minutes.
The acceleration speed of the plasma particles of the reaction gas may be appropriately controlled so as to form nano-protrusions having a desired shape. In addition, the etching pressure may be in the range of 1Pa to 10 Pa. When the etching process is performed in such an etching pressure range, nano-protrusions having low reflectivity may be formed.
For another example, nano-protrusions may be created on the glass surface by etching. Specifically, a mixed solution of hydrofluoric acid and nitric acid is coated on the surface of glass, and a catalyst or bubbles with a diameter of nanometer order are added to accelerate etching, thereby forming nanometer protrusions.
The assembly process of the solar cell module according to the present utility model is generally as follows: and attaching a polymer filling layer to the back surface opposite to the glass surface with the nano-protrusions, arranging the battery pieces on the polymer filling layer, and then welding the guide strips. And finally, attaching a back plate, laminating, and adding an aluminum frame and an electrode to complete the assembly of the solar cell module.
Solar modules that are exposed to the open air for long periods of time are often subject to the intrusion of contaminants such as rain, dust, etc. The nano-protrusions may provide a higher hydrophobicity to the glass surface. As shown in fig. 3, the nano-protrusion is similar to the lawn under an electron microscope, and the hydrophobic principle of the nano-protrusion is similar to that of the lotus leaf surface, so that the water drop can smoothly move and slide on the glass surface. And the nano-projections can form a very thin layer of air (i.e., a thickness on the order of nanometers) between the solid contaminants and the glass surface without directly contacting the glass surface and thus more easily separating from the glass surface. Therefore, the solar cell module according to the present utility model has good antifouling property and can extend the service life of the solar cell module.
Example IV
On the basis of the first embodiment, this embodiment further includes the following designs:
the transparent color film has a thickness of between 1nm and 10 nm. It will be appreciated that such a range of thicknesses can impart a visual appearance color to the solar cell module.
Example five
Preferably, the transparent color film is made of a metal alloy.
It will be appreciated that the metallic transparent colored film may be formed by any of the processes known in the art, such as ion permeation to provide a metallized film layer.
Specifically, an electric field is applied to a high-temperature glass ribbon in a tin bath of a float glass production line, so that metal ions migrate into the surface layer of the glass ribbon under the action of the electric field, the metal ions are reduced into metal colloid under a reducing atmosphere, and a metal film layer is formed on the surface of the glass ribbon.
For example, in a tin bath of a float glass production line, the drawing speed of a glass ribbon is 250-500 m/h, a metal electrode (such as metal copper) with the temperature of 180-420 is used as an anode, molten tin is used as a cathode, and direct current is introduced into the electrode to form an electric field;
and (3) feeding a low-melting-point metal matched with the metal electrode between the anode and the glass ribbon by using a feeding device, electrolyzing the metal into ions under the action of an electric field, penetrating the ions below the surface of the glass by 2-15 mu m, reducing the ions by using protective gas in a tin bath, forming a metal film layer on the surface of the moving hot glass ribbon, and coloring the surface of the glass ribbon.
Different metal compounds may produce different colors. For example, the colloids formed during ion penetration coloring are copper-lead alloy and copper-bismuth alloy, respectively, and the glass colors are grayish green and brownish red, respectively.
Example six
Preferably, the transparent color film presents red, green or blue, so that the appearance color of the solar cell module can be adjusted more accurately, and the identification degree of the product is increased.
For example, the metallic cobalt, nickel, silver, chromium and iron electrodes are used as the anode instead of the metallic copper electrodes, and the blue, green and yellow films can be obtained by keeping the other parameters and the process unchanged in the fifth embodiment.
Example seven
Preferably, the polymer filling layer is made of EVA.
EVA has desirable strength and elasticity as a filler layer between the glass layer and the battery cell to provide protection to the battery cell.
Example eight
Preferably, the battery piece is a back contact battery.
It is understood that the solar cell module according to the present utility model is applicable to all back contact cells. Back contact batteries refer to a class of batteries that: the positive and negative contacts are on the back side of the cell assembly, i.e., the side facing away from the solar light incident surface. The back contact battery has higher photoelectric conversion rate and less shadow loss, and is one of the most widely used solar batteries in the photovoltaic industry at present.
Example nine
Preferably, the back contact cell according to the present utility model is any one of an inter-digital back contact (IBC) electrical, oxide passivation contact (TOPCon) cell.
Examples ten
Preferably, the polymer back sheet has at least one layer, and the polymer back sheet is made of PPH or/and TPT.
Wherein PPH refers to a homopolymer of polypropylene (polypropylene homopolymer). Because the raw material of PPH is resin and its processing aid, the proportion of resin in the pipe is large. The PPH has a uniform and fine Beta crystal structure due to modification, so that the PPH can resist chemical corrosion, wear and high temperature, resist corrosion, aging and have good insulativity, and also has excellent impact resistance at low temperature.
TPT is a structure of TEDLAR+PET+TEDLAR, which is obtained by compounding an upper layer and a lower layer of TEDLAR (trade name) polyvinyl fluoride (PVF) film of DuPont company by adding a layer of transparent polyethylene terephthalate (PET) in the middle.
As shown in fig. 1, the back sheet in this embodiment has two layers, namely a PPH layer 5 and a TPT layer 6, which are present to enhance the strength of the solar module and to make the solar module stronger and more durable.
According to the present utility model, the solar cell module according to the present utility model has low reflectivity and anti-fouling function thanks to the nano-protrusions, and thus can increase the photoelectric conversion rate of the solar cell module and extend the service life thereof. And the appearance color of the solar cell module can be more accurately adjusted thanks to the transparent color film.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. A solar cell module, comprising:
the surface of the glass layer is provided with nano protrusions, and the transparent color film is covered on the surface of the nano protrusions;
a polymer filling layer;
a battery sheet; and
a polymeric backsheet.
2. The solar cell module of claim 1, wherein the nano-projections have a height between 1nm and 300 nm.
3. The solar cell module of claim 1, wherein the nano-projections are comprised of a plurality of pyramidal projections, and the spacing between the ends of each pyramidal projection is between 30nm and 1000 nm.
4. The solar cell module of claim 1 wherein the transparent colored film has a thickness of between 1nm and 10 nm.
5. The solar cell module of any one of claims 1 to 4 wherein the transparent colored film is made of a metal alloy.
6. The solar cell module of any one of claims 1 to 4 wherein the transparent colored film exhibits red, green or blue.
7. The solar cell module of any one of claims 1 to 4 wherein the polymer fill layer is made of EVA.
8. The solar cell assembly of any one of claims 1 to 4, wherein the cell sheet is a back contact cell.
9. The solar cell assembly of claim 8, wherein the back contact cell is any one of an IBC cell, a TOPCon cell.
10. The solar cell module of any one of claims 1 to 4 wherein the polymeric backsheet has at least one layer, the polymeric backsheet being made of PPH or/and TPT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320555633.3U CN219800868U (en) | 2023-03-20 | 2023-03-20 | Solar cell module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320555633.3U CN219800868U (en) | 2023-03-20 | 2023-03-20 | Solar cell module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219800868U true CN219800868U (en) | 2023-10-03 |
Family
ID=88188012
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320555633.3U Active CN219800868U (en) | 2023-03-20 | 2023-03-20 | Solar cell module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219800868U (en) |
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2023
- 2023-03-20 CN CN202320555633.3U patent/CN219800868U/en active Active
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