CN111106193A - Solar cell module and preparation method thereof - Google Patents

Solar cell module and preparation method thereof Download PDF

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Publication number
CN111106193A
CN111106193A CN201811257027.3A CN201811257027A CN111106193A CN 111106193 A CN111106193 A CN 111106193A CN 201811257027 A CN201811257027 A CN 201811257027A CN 111106193 A CN111106193 A CN 111106193A
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nano
solar cell
cell module
polytetrafluoroethylene resin
mass percentage
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Inventor
赵圣云
沈伟峰
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Yancheng Dafeng Canadian Solar Electric Power Technology Co ltd
CSI Solar Power Group Co Ltd
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Yancheng Dafeng Canadian Solar Electric Power Technology Co ltd
CSI Solar Power Group Co Ltd
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Publication of CN111106193A publication Critical patent/CN111106193A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/049—Protective back sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention provides a solar cell module which comprises a light-transmitting plate, a front-layer packaging adhesive film, a cell string layer, a rear-layer packaging adhesive film and a back plate which are sequentially stacked from top to bottom. The battery string layer is provided with a plurality of battery pieces which are connected with each other, and gaps are arranged between the adjacent battery pieces. The back plate comprises a substrate, white coatings arranged corresponding to the gaps and transparent areas positioned between the white coatings. The white coating comprises polytetrafluoroethylene resin, nano-scale oxide and organic acid esters. The mass percentage of the polytetrafluoroethylene resin is 50-70%, the mass percentage of the nano-scale oxide is 5-10%, and the mass percentage of the organic acid ester is 1-5%. So set up, solar module has improved the utilization ratio to the light, has improved solar module's power. The invention also provides a preparation method of the solar cell module.

Description

Solar cell module and preparation method thereof
Technical Field
The invention relates to the technical field of solar photovoltaic power generation, in particular to a solar cell module and a preparation method thereof.
Background
Referring to fig. 1, a solar cell module generally includes a front plate 10 ', a front layer of packaging film 20 ', a cell string layer 30 ', a rear layer of packaging film 40 ', and a back plate 50 ' stacked in sequence from top to bottom, and the stacked parts are laminated into a whole by a laminator. Among them, the back sheet 50' has a certain influence on the efficiency of the solar cell module as an important component.
In order to pursue high power of the solar cell module, the usage amount of the dual-glass solar cell module is increasing, and the usage amount of the transparent back sheet is gradually increasing. However, the ultraviolet resistance of the transparent back sheet is still to be improved.
In view of the above, it is desirable to design a solar cell module and a method for manufacturing the same to solve the above problems.
Disclosure of Invention
The invention aims to provide a solar cell module with good ultraviolet resistance and a preparation method thereof.
In order to achieve the purpose, the invention provides a solar cell module which comprises a light-transmitting plate, a front-layer packaging adhesive film, a cell string layer, a rear-layer packaging adhesive film and a back plate which are sequentially stacked from top to bottom, wherein the cell string layer is provided with a plurality of mutually connected cell pieces, and a gap is formed between every two adjacent cell pieces; the back plate comprises a substrate, white coatings arranged on the substrate and corresponding to the gaps, and transparent areas positioned between the white coatings, wherein the battery piece is positioned right above the transparent areas; the solution of the white coating comprises polytetrafluoroethylene resin, nano-scale oxide and organic acid esters; the polytetrafluoroethylene resin accounts for 50-70% by mass, the nanoscale oxide accounts for 5-10% by mass, and the organic acid ester accounts for 1-5% by mass.
In a further improvement of the invention, the nanoscale oxide is any one or a mixture of more than one of nano silicon dioxide, nano aluminum trioxide, nano zinc oxide and nano titanium oxide.
In a further improvement of the present invention, the organic acid ester is one or more of isocyanate, amino resin and modified acrylic acid.
In a further improvement of the present invention, the isocyanate is diisocyanate, the amino resin is aromatic polyurethane, and the modified acrylic acid is epoxy acrylic acid.
As a further improvement of the invention, the mass percentage of the polytetrafluoroethylene resin is 70 percent, and the mass percentage of the nano-scale oxide is 8 to 10 percent.
As a further improvement of the invention, the thickness of the white coating is between 5 μm and 50 μm.
In order to achieve the above object, the present invention also provides a method for manufacturing a solar cell module, comprising the following steps;
s1, preparing a white coating solution for later use, wherein the white coating solution comprises polytetrafluoroethylene resin, nano-scale oxide, organic acid esters and ethyl acetate; the mass percentage of the polytetrafluoroethylene resin is 50-70%, the mass percentage of the nano-scale oxide is 5-10%, the mass percentage of the organic acid ester is 1-5%, and the mass percentage of the ethyl acetate is 15-44%;
s2, determining a region to be sprayed with the white coating of the backboard according to the inter-sheet distance and the inter-string distance of the battery pieces, wherein the region to be sprayed corresponds to the gap between the adjacent battery pieces, spraying the solution of the white coating on the region to be sprayed, and drying;
and S3, overlapping, laminating and cooling the light-transmitting plate, the front-layer packaging adhesive film, the battery string layer, the rear-layer packaging adhesive film and the back plate to obtain the solar battery assembly.
As a further improvement of the present invention, step S1 includes the steps of:
s11, adding the polytetrafluoroethylene resin into a grinding machine, and grinding until the particle size of the polytetrafluoroethylene resin particles is below 300 mu m for later use;
s12, adding the ground polytetrafluoroethylene resin particles into a container, adding the nano-scale oxide and ethyl acetate, uniformly mixing, and performing ultrasonic treatment;
and S13, adding an organic acid ester curing agent, and uniformly mixing.
In a further improvement of the invention, the nanoscale oxide is any one or a mixture of more than one of nano silicon dioxide, nano aluminum trioxide, nano zinc oxide and nano titanium oxide.
As a further improvement of the invention, the mass percentage of the polytetrafluoroethylene resin is 70 percent, and the mass percentage of the nano-scale oxide is 8 to 10 percent.
The beneficial effects of the invention include:
according to the preparation method of the solar cell module, polytetrafluoroethylene resin which is extremely resistant to ultraviolet light and good in weather resistance is used as main body resin, nano oxide is used as an additive, white coating solution with good ultraviolet resistance is prepared, and a white coating is coated on a region, corresponding to a gap between adjacent cell pieces, on a back plate; the white coating has high proportion of main resin and nano oxide, and ensures the whole weather resistance, ultraviolet resistance and reflectivity of the white coating. By the arrangement, on one hand, the white coating can block ultraviolet light incident through the light-transmitting plate, so that the risk of yellowing and cracking of the back plate corresponding to the gap area of the cell is reduced; the reflected light is recycled, the utilization rate of the light is improved, and therefore the power of the solar cell module is improved; on the other hand, the solar cell module is exposed outwards through the white coating, so that the phenomenon that the solar cell module is atomized and whitened after the back plate is laminated can be effectively improved.
Drawings
Fig. 1 is a schematic structural view of a conventional solar cell module.
Fig. 2 is a schematic structural diagram of a solar cell module according to the present invention.
Fig. 3 is a schematic cross-sectional view of a solar cell module according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 2 to fig. 3, the solar cell module 100 of the present invention includes a transparent plate 10, a front layer of packaging film 20, a cell string layer 30, a rear layer of packaging film 40, a back plate 50 and a frame (not shown) stacked in sequence from top to bottom. The battery string layer 30 includes a plurality of battery string layers (not numbered) arranged in a row, and the battery string layers include a plurality of battery plates 31 connected to each other, and a gap 32 is formed between adjacent battery plates 31.
The back plate 50 includes a substrate 51, white coatings 52 disposed on the substrate 51 and corresponding to the gap 32, and transparent regions 53 between the white coatings 52. The transparent regions 53 correspond to the shapes of the battery pieces 31 one by one, and the battery pieces 31 are correspondingly positioned right above the transparent regions 53.
The white coating 52 contains 50% -70% of main resin, 5% -10% of additive and 1% -5% of curing agent. The main resin is preferably polytetrafluoroethylene resin, the fluorine content of the main resin is up to 76%, the C-F bond energy is up to 485kJ/mol, the main resin is extremely resistant to ultraviolet irradiation, and the weather resistance is good. The polytetrafluoroethylene resin may be present in an amount of 50%, 55%, 60%, 65% or 70% by mass.
The additive mainly has the function of absorbing and reflecting visible light and ultraviolet light, and compared with a micron-sized additive, the nano-scale additive has the advantages of good dispersibility during coating preparation and good overall uniformity of the coating, and can be any one of nano-silica, nano-aluminum trioxide, nano-zinc oxide and nano-titanium oxide or a mixture of more than one of the materials. The higher proportion of host resin and additives ensures the overall weatherability and reflectivity of the white coating 52. The mass percentage of the nano oxide can be 5%, 6%, 7%, 7.5%, 8%, 9% or 10%.
Preferably, the mass percent of the polytetrafluoroethylene resin is 70 percent, and the mass percent of the nano-scale oxide is 8 to 10 percent.
The curing agent and the solvent are used to uniformly disperse particles such as the host resin, and are more advantageous for uniform spraying on the substrate 51. In the present invention, the organic acid ester is used as the curing agent, and may be any one of isocyanate, amino resin and modified acrylic acid or a combination of one or more of the above materials. Preferably, the isocyanate may be a diisocyanate, the amino resin may be an aromatic polyurethane, and the modified acrylic may be an epoxy acrylic. The organic acid ester may be present in an amount of 1%, 2%, 3%, 4% or 5% by mass.
The method for manufacturing the solar cell module 100 includes the following steps;
s1, preparing a white coating solution for later use, wherein the white coating solution comprises polytetrafluoroethylene resin, nano-scale oxide, organic acid esters and ethyl acetate; 50-70% of polytetrafluoroethylene resin, 5-10% of nano-scale oxide, 1-5% of organic acid ester and 15-44% of ethyl acetate;
s2, determining a region to be sprayed with the white coating of the backboard 50 according to the inter-sheet distance and the inter-string distance of the battery sheets 31, wherein the region to be sprayed corresponds to the gap 32 of the adjacent battery sheet 31, spraying the solution of the white coating on the region to be sprayed, and drying;
s3, the light-transmitting plate 10, the front-layer encapsulant film 20, the cell string layer 30, the rear-layer encapsulant film 40, and the back sheet 50 are stacked, laminated, and cooled to obtain the solar cell module 100.
Specifically, step S1 includes the steps of:
s11, adding the polytetrafluoroethylene resin into a grinding machine, and grinding until the particle size of the polytetrafluoroethylene resin particles is below 300 mu m for later use;
s12, adding a preset amount of ground polytetrafluoroethylene resin particles into a container, adding a preset amount of nano-scale oxide and ethyl acetate, uniformly mixing, and performing ultrasonic treatment;
and S13, adding a preset amount of organic acid ester curing agent, and uniformly mixing.
Example 1
In this embodiment, the solution of the white coating layer includes polytetrafluoroethylene resin, nano silica, diisocyanate, and ethyl acetate; wherein the mass percent of the polytetrafluoroethylene resin is 50%, the mass percent of the nano silicon dioxide is 5%, the mass percent of the diisocyanate is 1%, and the mass percent of the ethyl acetate is 44%.
Example 2
In this embodiment, the solution of the white coating layer includes polytetrafluoroethylene resin, nano silica, diisocyanate, and ethyl acetate; wherein, the mass percent of the polytetrafluoroethylene resin is 55%, the mass percent of the nano silicon dioxide is 7.5%, the mass percent of the diisocyanate is 1%, and the mass percent of the ethyl acetate is 36.5%.
Example 3
In this embodiment, the solution of the white coating layer includes polytetrafluoroethylene resin, nano silica, diisocyanate, and ethyl acetate; wherein, the mass percent of the polytetrafluoroethylene resin is 60%, the mass percent of the nano silicon dioxide is 7.5%, the mass percent of the diisocyanate is 1%, and the mass percent of the ethyl acetate is 31.5%.
Example 4
In this embodiment, the solution of the white coating layer includes polytetrafluoroethylene resin, nano silica, diisocyanate, and ethyl acetate; wherein, the mass percent of the polytetrafluoroethylene resin is 65%, the mass percent of the nano silicon dioxide is 7.5%, the mass percent of the diisocyanate is 3%, and the mass percent of the ethyl acetate is 24.5%.
Example 5
In this embodiment, the solution of the white coating layer includes polytetrafluoroethylene resin, nano silica, diisocyanate, and ethyl acetate; wherein the mass percent of the polytetrafluoroethylene resin is 70%, the mass percent of the nano silicon dioxide is 8%, the mass percent of the diisocyanate is 1%, and the mass percent of the ethyl acetate is 21%.
Example 6
In this embodiment, the solution of the white coating layer includes polytetrafluoroethylene resin, nano silica, diisocyanate, and ethyl acetate; wherein the mass percent of the polytetrafluoroethylene resin is 70%, the mass percent of the nano silicon dioxide is 8%, the mass percent of the diisocyanate is 3%, and the mass percent of the ethyl acetate is 19%.
Example 7
In this embodiment, the solution of the white coating layer includes polytetrafluoroethylene resin, nano silica, diisocyanate, and ethyl acetate; wherein the mass percent of the polytetrafluoroethylene resin is 70%, the mass percent of the nano silicon dioxide is 10%, the mass percent of the diisocyanate is 5%, and the mass percent of the ethyl acetate is 15%.
Examples 8 to 14
The only difference from examples 1-7 is that nanosilica was replaced with nano aluminum trioxide.
Examples 15 to 21
The only difference from examples 1-7 is that nanosilica was replaced with nano zinc oxide.
Examples 21 to 28
The only difference from examples 1-7 is that the nanosilica was replaced with nano-titania.
Examples 29 to 35
The only difference from examples 1 to 7 is that the diisocyanate was replaced with an aromatic polyurethane.
Examples 36 to 42
The only difference from examples 1 to 7 is that the diisocyanate was replaced by epoxy acrylic.
The prepared solution of the white coating 52 is sprayed to the area of the back plate 50 corresponding to the gap 32 by using a spraying device, and then the back plate 50 is dried by an oven, in the process, the solvent ethyl acetate is completely volatilized. That is, there is no ethyl acetate residue in the white coating 52 on the backsheet 50.
Preferably, the thickness of the white coating 52 is between 5 μm and 50 μm. Because, if the white coating 52 is too thin, it can cause great difficulty in the spray process; and if the white coating 52 is too thin, the white effect will not be too good; if the white coating 52 is too thick, on the one hand, it will increase the cost and, on the other hand, the thickness uniformity will be difficult to control; and may cause a significant difference in level between the region where the white coating 52 is located and the transparent region 53, which may cause more cracks when the battery sheet 31 is laid.
The white coating 52 prepared in examples 1 to 7 was applied to a conventional 300W solar cell module, the back sheet 50 of which was a fully transparent back sheet, and the obtained effects are shown in table 1.
TABLE 1 Power optimization of solar modules
Figure BDA0001842960440000071
Referring to fig. 2 to 3 in combination with table 1, in seven examples, the proportions of the components in the solutions for preparing the white coating 52 are different, and the back sheets 50 of the solar cell modules 100 of examples 1 to 7 have reflectivities of 80%, 86%, 86%, 88%, 88%, 88% and 92%, respectively, and have excellent reflectivities and ultraviolet resistance, and the reflectivities are significantly enhanced compared with the reflectivities of 9% to 11% of the conventional transparent back sheets.
In fig. 3, arrows indicate the reflection direction of light rays in the gap 32 area, and ultraviolet light incident to the white coating 52 is blocked, so that the risk of yellowing and cracking of the back sheet 50 corresponding to the gap 32 area between the battery pieces is reduced, and the weather resistance of the back sheet 50 is improved.
In addition, incident light is reflected to the light-transmitting plate 10 through the white coating 52 and then enters the cell 31, so that light is recycled, the power of the solar cell module 100 in the embodiments 1 to 7 is 301.344W, 301.4448W, 301.4448W, 301.4784W, 301.4784W, 301.4784W and 301.5456W, the utilization rate of light is improved, and compared with the power of a conventional solar cell module which is 300W, the power of the solar cell module 100 is improved.
The substrate 51 is a transparent plate. In the area corresponding to the gap 32, the white coating 52 is exposed outwards, that is, the white coating 52 is visually seen by a user from the appearance, so that the phenomenon that the solar cell module 100 is fogged and whitened after the back sheet 50 is laminated can be effectively improved, and the overall aesthetic degree and consistency of the solar cell module 100 are improved.
The cell 31 is a double-sided light receiving cell.
In summary, according to the preparation method of the white coating solution, the polytetrafluoroethylene resin which is extremely resistant to ultraviolet irradiation and has good weather resistance is used as the main resin, and the nano oxide is used as the additive, so that the white coating solution with good ultraviolet resistance is prepared; the higher proportion of the main resin and the additive ensures the overall weather resistance and reflectivity of the white coating 52; the solar cell module 100 of the present invention coats the white coating 52 on the substrate 51 corresponding to the gap 32 between the adjacent cells 31, and the white coating 52 has good ultraviolet resistance and high light reflectivity. With such an arrangement, on one hand, the incident ultraviolet light penetrating through the light-transmitting plate 10 can be blocked, so that the risk of yellowing and cracking of the back plate 50 corresponding to the gap 32 area of the cell is reduced; the reflected light is recycled, and the utilization rate of the light is improved, so that the power of the solar cell module 100 is improved; on the other hand, the white coating 52 is exposed outwards, so that the phenomenon that the solar cell module 100 is fogged and whitened after the back sheet 50 is laminated can be effectively improved.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims (10)

1. A solar cell module comprises a light-transmitting plate, a front-layer packaging adhesive film, a cell string layer, a rear-layer packaging adhesive film and a back plate which are sequentially stacked from top to bottom, wherein the cell string layer is provided with a plurality of mutually connected cells, and a gap is formed between every two adjacent cells; the method is characterized in that: the back plate comprises a substrate, white coatings arranged on the substrate and corresponding to the gaps, and transparent areas positioned between the white coatings, wherein the battery piece is positioned right above the transparent areas; the solution of the white coating comprises polytetrafluoroethylene resin, nano-scale oxide and organic acid esters; the polytetrafluoroethylene resin accounts for 50-70% by mass, the nanoscale oxide accounts for 5-10% by mass, and the organic acid ester accounts for 1-5% by mass.
2. The solar cell module of claim 1, wherein: the nano-scale oxide is any one or a mixture of more than one of nano-silica, nano-aluminum trioxide, nano-zinc oxide and nano-titanium oxide.
3. The solar cell module of claim 1, wherein: the organic acid ester is any one or a composition of more than one of isocyanate, amino resin and modified acrylic acid.
4. The solar cell module of claim 3, wherein: the isocyanate is diisocyanate, the amino resin is aromatic polyurethane, and the modified acrylic acid is epoxy acrylic acid.
5. The solar cell module of claim 1, wherein: preferably, the mass percentage of the polytetrafluoroethylene resin is 70%, and the mass percentage of the nano-scale oxide is 8% -10%.
6. The solar module according to any one of claims 1-5, wherein: the thickness of the white coating is between 5 and 50 μm.
7. A preparation method of a solar cell module comprises the following steps;
s1, preparing a white coating solution for later use, wherein the white coating solution comprises polytetrafluoroethylene resin, nano-scale oxide, organic acid esters and ethyl acetate; the mass percentage of the polytetrafluoroethylene resin is 50-70%, the mass percentage of the nano-scale oxide is 5-10%, the mass percentage of the organic acid ester is 1-5%, and the mass percentage of the ethyl acetate is 15-44%;
s2, determining a region to be sprayed with the white coating of the backboard according to the inter-sheet distance and the inter-string distance of the battery pieces, wherein the region to be sprayed corresponds to the gap between the adjacent battery pieces, spraying the solution of the white coating on the region to be sprayed, and drying;
and S3, overlapping, laminating and cooling the light-transmitting plate, the front-layer packaging adhesive film, the battery string layer, the rear-layer packaging adhesive film and the back plate to obtain the solar battery assembly.
8. The method for manufacturing a solar cell module according to claim 7, characterized in that: step S1 includes the following steps:
s11, adding the polytetrafluoroethylene resin into a grinding machine, and grinding until the particle size of the polytetrafluoroethylene resin particles is below 300 mu m for later use;
s12, adding the ground polytetrafluoroethylene resin particles into a container, adding the nano-scale oxide and ethyl acetate, uniformly mixing, and performing ultrasonic treatment;
and S13, adding an organic acid ester curing agent, and uniformly mixing.
9. The method for manufacturing a solar cell module according to claim 8, characterized in that: the nano-scale oxide is any one or a mixture of more than one of nano-silica, nano-aluminum trioxide, nano-zinc oxide and nano-titanium oxide.
10. The method for manufacturing a solar cell module according to claim 8, characterized in that: the mass percentage of the polytetrafluoroethylene resin is 70%, and the mass percentage of the nano-scale oxide is 8% -10%.
CN201811257027.3A 2018-10-26 2018-10-26 Solar cell module and preparation method thereof Pending CN111106193A (en)

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CN207834319U (en) * 2017-12-21 2018-09-07 苏州阿特斯阳光电力科技有限公司 Photovoltaic module backboard and photovoltaic module with the backboard
CN108198885A (en) * 2018-01-18 2018-06-22 晶澳太阳能有限公司 A kind of double-sided solar battery component for promoting generated energy

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