CN115020521A - Solar cell module and preparation method thereof - Google Patents
Solar cell module and preparation method thereof Download PDFInfo
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- CN115020521A CN115020521A CN202210816386.8A CN202210816386A CN115020521A CN 115020521 A CN115020521 A CN 115020521A CN 202210816386 A CN202210816386 A CN 202210816386A CN 115020521 A CN115020521 A CN 115020521A
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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
- H01L31/0488—Double glass encapsulation, e.g. photovoltaic cells arranged between front and rear glass 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
- H01L31/02—Details
- H01L31/0216—Coatings
- H01L31/02161—Coatings for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/02167—Coatings for devices characterised by at least one potential jump barrier or surface barrier for solar cells
-
- 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
- H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
-
- 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
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- 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
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- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Computer Hardware Design (AREA)
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Abstract
The invention discloses a solar cell module and a preparation method of the solar cell module. The solar cell module includes: the laminated piece and a frame arranged on the side surface of the laminated piece; the laminated piece comprises glass, an encapsulation film and a battery piece which are arranged on a first main surface of the glass, and a moisture-resistant and pressure-resistant insulating film which is arranged on a second main surface of the glass far away from the battery piece and the side surface of the glass close to a frame; wherein the pressure-resistant moisture-resistant insulating film can prevent cations from flowing into the battery piece; the cover length of the pressure-resistant moisture-resistant insulating film on the second main surface of the glass is longer than the cover length of the frame on the second main surface of the glass, and the pressure-resistant moisture-resistant insulating film does not cover the entire second main surface of the glass. The solar cell module remarkably reduces the PID effect of the solar cell module under a high-voltage system, and improves the output power of the solar cell module.
Description
Technical Field
The invention relates to a solar cell module and a preparation method of the solar cell module.
Background
Photovoltaic power generation is a technology of directly converting light energy into electric energy by utilizing the photovoltaic effect of a semiconductor interface, and mainly comprises a solar cell module (also called a photovoltaic module), a controller and an inverter. A photovoltaic power generation device is provided with: the method is safe, reliable, noiseless and nuisanceless; the method is not limited by resource distribution regions; the energy quality is high; the time spent on obtaining energy is short, and the like. However, the price of solar power generation is basically equal to that of traditional fossil energy, and the realization of the flat price of photovoltaic power generation on the internet really becomes a problem to be solved urgently in the current photovoltaic commercialization process, namely the effective reduction of the cost of a photovoltaic system and the improvement of the power generation efficiency still remain the core subject of the development of the future photovoltaic industry.
With the increase of system voltage to 2000V (2000V high voltage resistant components and supporting electrical devices mean lower system cost and higher power generation efficiency, therefore, 2000V system voltage will become a new technical trend), at this time, the PID (Potential Induced Degradation) effect to be faced by photovoltaic components will become more serious, and since the PID effect is finally reflected in the output power attenuation of solar battery components, how to design a solar battery component which can meet the PID requirements (IEC TS 62804-1: 2015: 85 ℃/RH 85%, 96 hours, maximum system voltage 2000V, PID ≦ 5%) when working for a long time under 2000V system voltage is a problem to be solved urgently at present.
Disclosure of Invention
In view of the above, the present invention provides a solar cell module and a method for manufacturing the solar cell module, in which a piezoresistive wet-resistant insulating film is disposed on a glass of the solar cell module, so that a PID effect of the solar cell module, especially a solar cell module in a high voltage system, is significantly reduced, and an output power of the solar cell module is improved.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, the present invention provides a solar cell module comprising: a laminate, and a bezel disposed at a side of the laminate;
the laminate comprises a glass having a glass pane,
an encapsulation film and a battery sheet disposed on the first major surface of the glass,
the compression-resistant moisture-resistant insulating film is arranged on the second main surface of the glass far away from the battery piece and the side surface of the glass close to the frame;
wherein the pressure resistant humidity resistant insulating film may prevent cations from flowing into the cell sheet;
the covering length of the pressure-resistant moisture-resistant insulating film on the second main surface of the glass is longer than the covering length of the frame on the second main surface of the glass, and the pressure-resistant moisture-resistant insulating film does not cover the entire second main surface of the glass.
Further, the covering length of the pressure-resistant humidity-resistant insulating film on the second main surface of the glass is smaller than or equal to the distance between the side surface of the cell piece and the side surface of the glass.
Further, the laminate further comprises: and the anti-pressure-resistance wet insulation film is arranged on the first main surface of the glass, the covering length of the anti-pressure-resistance wet insulation film on the first main surface of the glass is longer than the covering length of the frame on the second main surface of the glass, and the anti-pressure-resistance wet insulation film does not cover the whole first main surface of the glass.
Further, the thickness of the moisture resistance and pressure resistance insulating film is 10nm to 200 nm.
Further, the pressure and humidity resistant insulating film is formed by bonding one or more of silicone oil, fluorosilicone oil, silicone and silicone grease with silicon oxide on the surface of the glass.
Further, the solar cell module comprises a piece of glass, wherein the glass is arranged on the front side of the cell piece;
or the solar cell module comprises two pieces of glass which are respectively arranged on the front surface and the back surface of the cell piece, and the anti-pressure-humidity-resistance insulating film is arranged on the second main surface of at least one piece of glass far away from the cell piece and the side surface of the glass close to the frame.
In a second aspect, the present invention provides a method for manufacturing a solar cell module, including:
102, arranging an encapsulation film and a battery piece on the first main surface of the glass in sequence, and laminating to form a laminated piece;
103, arranging a frame on the side surface of the laminated part;
wherein the pressure resistant humidity resistant insulating film may prevent cations from flowing into the cell sheet;
the covering length of the pressure-resistant moisture-resistant insulating film on the second main surface of the glass is longer than the covering length of the frame on the second main surface of the glass, and the pressure-resistant moisture-resistant insulating film does not cover the entire second main surface of the glass.
Further, the step 101 includes:
step 1-1, cleaning the surface of the glass by using a cleaning solution;
step 1-2, performing surface activation treatment on a formation region of the moisture-resistant and pressure-resistant insulating film on the glass to break and activate Si-O bonds on the surface of the glass;
step 1-3, adding a treating agent to the formation region, performing plasma surface treatment on the formation region so that the treating agent bonds with silicon oxide on the surface of the formation region, and performing heat treatment on the formation region to produce the pressure-resistant moisture-resistant insulating film.
Further, the cleaning solution includes one or more of methanol, acetone, and deionized water.
Further, the treating agent is one or more of silicone oil, fluorosilicone oil, silicone and silicone grease.
Further, the temperature of the heat treatment is 60-150 ℃, and the time of the heat treatment is 3-10 min.
Further, the packaging film is a polyolefin packaging film; the electrical resistivity of the packaging film is greater than or equal to 1.0 multiplied by 10 16 Ω·cm。
Further, the step 103 includes: :
step 3-1, arranging sealant in the clamping groove of the frame;
and 3-2, fixing the laminated part by using the frame.
The technical scheme of the first aspect of the invention has the following advantages or beneficial effects: according to the scheme provided by the embodiment of the invention, the pressure-resistant and moisture-resistant insulating film capable of preventing cations from flowing into the cell is arranged on the glass of the solar cell module, so that the solar cell module can be suitable for a high-voltage system due to the high-voltage resistance of the insulating film, the power generation efficiency of the solar cell module is improved, the PID effect of the solar cell module under the high-voltage system is reduced due to the moisture-resistant function of the insulating film, and the output power of the solar cell module is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of a solar cell module according to one embodiment of the invention;
FIG. 2 is a schematic cross-sectional view of a solar cell module according to yet another embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a solar cell module according to another embodiment of the present invention;
FIG. 4 is a top view of a solar cell module according to an embodiment of the invention;
FIG. 5 is a basic structure of a dual glass solar cell module and an ion transport path model resulting in PID effect;
FIG. 6 is a schematic view of a covered region of a resistive moisture barrier film in a solar cell module according to an embodiment of the present invention;
FIG. 7 is a schematic view of a covered region of a resistive moisture barrier film in a solar cell module according to yet another embodiment of the present invention;
FIG. 8 is a schematic half-section view of a solar cell module according to an embodiment of the invention;
fig. 9 is a schematic flow chart of a method for manufacturing a solar cell module according to an embodiment of the present invention.
The reference numbers are as follows:
10-glass 20-packaging film 30-solar cell 40-frame
50-anti-pressure damp insulation film 60-sealing glue 70-cation migration path
Side A- -the second major surface of the glass
B-plane-first major surface of glass-C-plane-side surface of glass
D- -length of coverage of the bezel on the second major surface of the glass
L-coverage length of the compression-resistant moisture-resistant insulating film on the second main surface of the glass
Detailed Description
In the following description and in the appended claims, the PID (Potential Induced Degradation) effect is expressed in that a solar cell module (photovoltaic module) generates leakage current between glass and an encapsulating material under the action of high voltage for a long time, so that a large amount of charges are accumulated on the surface of the solar cell, the passivation effect on the surface of the solar cell is damaged, and the output power of the solar cell module is attenuated by more than 30%, and the effect is easy to occur in a high-temperature and humid application environment, and the power generation and safety of the solar cell module are seriously affected.
In the existing method, the hydrophobic film layer is directly coated on the whole glass surface, although the hydrophobic function of the hydrophobic film layer can reduce the PID effect of the solar cell module in the high-voltage system to a certain extent, the reduction range is not obvious, particularly the PID effect is still high when the hydrophobic film layer is applied to the solar cell module in the high-voltage system, and meanwhile, the output power of the solar cell module is low due to the fact that the hydrophobic film layer is coated on the whole glass surface.
In order to solve the problem that the output power of a solar cell module is lower due to higher PID effect of the solar cell module under a high-voltage system in the prior art, in the preparation method of the solar cell module provided by the embodiment of the invention, the pressure-resistant and humidity-resistant insulating film is arranged on the glass, wherein the coverage length of the pressure-resistant and humidity-resistant insulating film on the second main surface of the glass is longer than that of the frame on the second main surface of the glass, and the pressure-resistant and humidity-resistant insulating film does not cover the second main surface of the whole glass. The high-voltage resistance of the insulating film enables the solar cell module to be suitable for a high-voltage system, the power generation efficiency of the solar cell module is improved, the moisture resistance function of the insulating film enables the PID effect of the solar cell module under the high-voltage system to be reduced, and the output power of the solar cell module is improved. Meanwhile, the insulating film does not completely cover the whole second main surface of the glass, so that light rays can not penetrate through the glass, the absorption of the cell piece on the light rays can not be influenced, and the power of the solar cell module can not be influenced. In addition, the solar cell module provided by the embodiment of the invention has the advantages of simple preparation process, improvement of the preparation efficiency of the solar cell module, and reduction of the process manufacturing difficulty and the preparation cost.
Specifically, in order to solve the above problems and achieve the above effects, embodiments of the present invention provide a solar cell module. FIGS. 1-3 show schematic cross-sectional views of a solar cell module; fig. 4 shows a top view of a solar module. As shown in fig. 1, the solar cell module mainly includes: a laminate, and a frame 40 disposed at a side of the laminate;
the laminate comprises a glass (10) having,
the encapsulation film 20 and the battery sheet 30 disposed on the first major surface of the glass 10,
and a moisture and pressure resistant insulating film 50 disposed on a second main surface of the glass 10 away from the battery piece 30 and on a side surface of the glass 10 close to the frame 40.
Wherein the compression-resistant moisture-resistant insulating film 50 can prevent cations from flowing into the cell 30.
When the solar cell module is subjected to negative bias, the leakage current anode ions (generally Na) are generated + ) Flowing into the cell plate, reducing the parallel resistance of the cell, and fig. 5 shows the basic structure of the dual-glass solar cell module and an ion transport path model causing the PID effect. As shown in fig. 5, cations may be concentrated to the surface of the cell sheet 30 (cations are mainly concentrated to the second major surface of the glass 10 and the edge near the side of the frame 40 toward the surface of the cell sheet 30) through the illustrated leakage current path (path 70 indicated by black arrows), resulting in a high PID effect. In order to reduce the PID effect of the solar cell module in a high voltage system, the PID effect can be effectively reduced by cutting off the path of cation transportation to the surface of the solar cell sheet 30, thereby improving the output efficiency of the solar cell sheet. Therefore, in the embodiment of the present invention, the pressure-resistant moisture-resistant insulating film 50 is provided on the second main surface of the glass 10 and the side surface near the frame, thereby preventing cations from flowing into the cell 30.
The glass used in the solar cell module is generally a rectangular parallelepiped with a small thickness, and includes a first main surface and a second main surface which are oppositely arranged, and four side surfaces located between the two main surfaces; in the embodiment of the present invention, the pressure-resistant moisture-resistant insulating film 50 is disposed on the side of the glass on which the bezel 40 is mounted, and the pressure-resistant moisture-resistant insulating film 50 may be disposed on the side on which the bezel is not mounted, or may not be disposed.
The cover length of the pressure-resistant moisture-resistant insulating film 50 on the second main surface of the glass 10 is longer than the cover length of the bezel 40 on the second main surface of the glass 10, and the pressure-resistant moisture-resistant insulating film 50 does not cover the entire second main surface of the glass 10. Specifically, as shown in fig. 8, the coverage length L of the moisture-blocking and compression-resistant insulating film 50 on the second main surface of the glass 10 is longer than the coverage length D of the bezel 40 on the second main surface of the glass 10. Through the arrangement, the moisture resistance effect in the frame packaging area is guaranteed, and the PID effect of the solar cell module in a high-humidity environment is reduced.
Through research, the positive ions (generally Na) causing the PID effect of the solar cell module are found + ) The light enters the solar cell from the frame position, so the covering length of the pressure-resistant moisture-resistant insulating film 50 on the second main surface of the glass 10 is longer than that of the frame 40, and the second main surface of the glass 10 does not need to be covered completely, so that the influence of the pressure-resistant moisture-resistant insulating film 50 on the light transmission is reduced, and the light can smoothly transmit through the glass 10 and be absorbed by the solar cell.
Further, the coverage length of the stress-resistant moisture-resistant insulating film 50 on the second main surface of the glass 10 is smaller than or equal to the distance between the side surface of the cell 30 and the side surface of the glass 10.
Because in the solar cell module, there is certain interval between the side of cell piece and the side of glass, through above-mentioned setting for this interval is covered to anti pressure resistance wet insulation film, does not cover the cell piece simultaneously, avoids influencing the absorption of cell piece to light. A solar cell module generally includes a plurality of cells, and the plurality of cells are arranged in a matrix. As will be understood by those skilled in the art, the side surface of the cell described in the embodiments of the present invention refers to the side surface of the cell in the outermost row and the outermost column of the cell array, which is close to the frame.
Further, a sealant 60 is further arranged in the clamping groove of the frame 40, the lamination part and the frame are fixed through the sealant 60, and a waterproof effect is achieved.
Fig. 2 shows a schematic cross-sectional view of a solar cell module according to another embodiment of the invention, as shown in fig. 2, the laminate further comprising: the pressure-resistant moisture-resistant insulating film 50 is provided on the first main surface of the glass 10, a covering length of the pressure-resistant moisture-resistant insulating film 50 on the first main surface of the glass 10 is longer than a covering length of the frame 40 on the second main surface of the glass 10, and the pressure-resistant moisture-resistant insulating film 50 does not cover the entire first main surface of the glass 10. Specifically, fig. 6 is a schematic diagram illustrating a coverage area of the pressure-resistant moisture-resistant insulating film 50 disposed on the glass 10 in the solar cell module shown in fig. 2, where as shown in fig. 6, the a surface represents the second main surface of the glass 10 (i.e., the side of the glass 10 away from the cell sheet 30), and the C surface represents the side edge of the glass 10 (i.e., the side of the glass 10 close to the frame 40). The anti-pressure-resistance and humidity-resistance insulating film 60 is disposed on the second main surface (i.e., surface a) of the glass 10 and on the side (i.e., surface C) of the glass 10 close to the frame 40, so as to block a path for cations to gather from the edge of the glass 10 to the cell 30 under a high-pressure and high-humidity environment, thereby effectively reducing the PID effect under a high-pressure system.
Fig. 3 shows a schematic cross-sectional view of a solar cell module according to a further embodiment of the invention, as shown in fig. 3, the laminate further comprising: and a moisture-and pressure-resistant insulating film 50 respectively provided on the first main surface, the second main surface, and the side surfaces of the two glasses 10. Specifically, fig. 7 shows a schematic view of the coverage area of the pressure-resistant moisture-resistant insulating film 50 disposed on the glass 10 in the solar cell module shown in fig. 3, and as shown in fig. 7, the B surface represents the first main surface of the glass 10 (i.e., the side of the glass 40 close to the cell sheet 30). The pressure-resistant and humidity-resistant insulating film 50 is disposed on the side of the glass 10 away from the cell 30 (i.e., the a side), the side of the glass 10 close to the cell 30 (i.e., the B side), and the side of the glass 10 close to the frame 40 (i.e., the C side), so as to block the path of cations from the edge of the glass 10 to the cell 30 in a high-pressure and high-humidity environment, and further reduce the PID effect in a high-pressure system.
In the embodiment of the present invention, the thickness of the moisture-blocking and compression-resistant insulating film 50 is 10nm to 200nm, for example, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm, 100nm, 110nm, 120nm, 130nm, 140nm, 150nm, 160nm, 170nm, 180nm, 190 nm. The anti-pressure-humidity-resistant insulating film 50 is formed by bonding one or more of silicone oil, fluorosilicone oil, silicone, and silicone grease with silicon oxide on the surface of the glass 10.
In the embodiment of the present invention, the electrical resistivity of the encapsulation film disposed between the glass 10 and the battery sheet 30 is 1.0 × 10 or more 16 Ω·cm。
The solar cell module is divided into a single-glass module and a double-glass module. In the single glass module, the glass 10 is disposed only on the front surface (i.e., light incident surface) of the cell 30, and the back surface (i.e., backlight surface) of the cell 30 is encapsulated by a polymer material back plate. In the dual glass assembly, the front and back surfaces of the cell sheet 30 are provided with the glass 10.
In the embodiment of the present invention, when the solar cell module is a single glass module, only one piece of the above glass 10 provided with the humidity resistant insulating film is included, and the glass 10 is provided on the front surface of the cell sheet 30;
when the solar cell module is a dual-glass module, the solar cell module comprises two pieces of glass 10 which are respectively arranged on the front surface and the back surface of the cell piece 30, and at least one second main surface of the glass 10 far away from the cell piece 30 and the side surface of the glass 10 close to the frame 40 are provided with pressure-resistant humidity-resistant insulating films 50.
That is, the pressure-resistant moisture-resistant insulating film 50 may be provided on the glass 10 located on the front surface of the cell sheet 30, the pressure-resistant moisture-resistant insulating film 50 may be provided on the glass 10 located on the rear surface of the cell sheet 30, or the pressure-resistant moisture-resistant insulating films 50 may be provided on both the glasses 10. Also, in the case where the moisture resistant and resistant insulating film 50 is provided on both the glass sheets 10, the moisture resistant and resistant insulating film 50 may be provided on both the first main surface and the second main surface of the glass sheet 10 on the front side, while the glass sheet 10 on the back side is provided with the moisture resistant and resistant insulating film 50 only on the second main surface; it is also possible that the back glass 10 is provided with the pressure-resistant moisture-resistant insulating film 50 on both the first main surface and the second main surface, and the front glass 10 is provided with the pressure-resistant moisture-resistant insulating film 50 only on the second main surface; alternatively, both glasses 10 are provided with the moisture-resistant humidity-resistant insulating film 50 on the first main surface and the second main surface (as shown in fig. 3); alternatively, both glasses 10 are provided with the moisture-resistant humidity-resistant insulating film 50 only on the second main surface (as shown in fig. 2). Alternatively, as shown in fig. 8, the coverage width of the stress-resistant moisture-blocking insulating film 50 at the second surface of the back glass is larger than that at the second surface of the front glass.
Further, in the embodiment of the invention, a junction box is further arranged on the back plate or the back glass.
Another aspect of the present invention also provides a method for manufacturing the solar cell module, and fig. 9 shows a schematic main flow chart of the method for manufacturing the solar cell module, and as shown in fig. 9, the method for manufacturing the solar cell module may include the following steps:
102, arranging the packaging film 20 and the battery piece 30 on the first main surface of the glass 10 in sequence, and forming a laminated piece through lamination;
103, arranging a frame 40 on the side surface of the laminated part;
wherein the compression-resistant moisture-resistant insulating film 50 can prevent cations from flowing into the battery piece 30;
the cover length of the pressure-resistant moisture-resistant insulating film 50 on the second main surface of the glass 10 is longer than the cover length of the bezel 40 on the second main surface of the glass 10, and the pressure-resistant moisture-resistant insulating film 50 does not cover the entire second main surface of the glass 10.
For the step 101, a specific embodiment may include:
step 1-1, cleaning the surface of glass 10 by using a cleaning solution;
step 1-2, performing surface activation treatment on a formation region of the moisture-blocking resistant insulating film 50 on the glass 10 to activate the Si — O bond breakage on the surface of the glass 10;
step 1-3, adding a treatment agent to the formation region, performing plasma surface treatment on the formation region so that the treatment agent bonds with silicon oxide on the surface of the formation region, and performing heat treatment on the formation region to produce the moisture-resistant anti-pressure-blocking insulating film 50.
The anti-pressure-resistance humidity-resistance insulating film is an insulating film with high pressure resistance and high humidity resistance, and is formed by ionizing oxygen/nitrogen under the action of an electric field, accelerating the oxygen/nitrogen under the action of the electric field, bombarding one or more treating agents comprising silicone oil, fluorosilicone oil, silicone and silicone grease by using nitrogen/oxygen ions, and bonding the treated agents with silicon oxide on the surface of glass after long-chain molecules of the treating agents are broken.
Wherein, the treating agent is one or more of silicone oil, fluorosilicone oil, silicone and silicone grease. Under the action of an electric field, oxygen/nitrogen is ionized and accelerated in the electric field, and one or more treating agents including silicone oil, fluorosilicone oil, silicone and silicone grease are bombarded by nitrogen/oxygen ions, so that long-chain molecules of the treating agents are broken and then bonded with silicon oxide on the surface of glass to generate the piezoresistive wet insulation film. The heat treatment temperature is 60 to 150 ℃ (e.g., 70 ℃, 80 ℃, 90 ℃, 100 ℃, 110 ℃, 120 ℃, 130 ℃, 140 ℃, etc.), the heat treatment time is 3 to 10min (e.g., 4min, 5min, 6min, 7min, 8min, 9min, 10min), after the long chain molecules of the treating agent are broken, the long chain molecules are bonded with the silicon oxide on the glass surface, and then the formed region is heat treated, thereby contributing to improving the bonding force between the pressure-resistant humidity-resistant insulating film 50 and the glass surface, and further more effectively exerting the high pressure resistance and high humidity resistance effect.
For the step 103, a specific embodiment may include:
step 3-1, arranging a sealant 60 in the clamping groove of the frame 40;
step 3-2, the laminate is secured with a frame 40.
Be provided with sealed glue 60 in the draw-in groove of frame 40, it is fixed with frame 40 with the lamination piece through sealed glue 60's setting to waterproof effect has been played.
The solar cell module is divided into a single-glass module and a double-glass module. In the single glass assembly, the glass 10 is disposed only on the front surface (i.e., light incident surface) of the cell 30, and the back surface (i.e., backlight surface) of the cell 30 is encapsulated by a polymer material back plate. In the dual glass assembly, the front and back surfaces of the cell sheet 30 are provided with the glass 10.
Further, in the embodiment of the present invention, in step 102, the encapsulation film 20 and the battery sheet 30 are sequentially disposed on the first main surface of the glass 10, and after the frame 40 is mounted to the laminate, a step of mounting a junction box on the back sheet or the back glass is further included.
According to the embodiment of the invention, on one hand, the covering length of the pressure-resistant and moisture-resistant insulating film 50 on the second main surface of the glass 10 is longer than that of the frame 40 on the second main surface of the glass 10, and as the sealant 60 is arranged in the clamping groove of the frame 40, the battery piece is effectively protected from being subjected to high-pressure and high-humidity application environments, and the PID effect is reduced. On the other hand, it is also possible to control the pressure-resistant wetting insulation film 50 not to cover the entire second main surface of the glass 10. Through the arrangement, the situation that the anti-pressure resistance wet insulation film 50 is generated on the whole glass surface to influence the absorption of sunlight, and the power of the solar cell module is reduced is avoided.
According to the solar cell module manufacturing method provided by the embodiment of the invention, the pressure-resistant humidity-resistant insulating film capable of preventing cations from flowing into the cell piece is arranged on the glass, wherein the covering length of the pressure-resistant humidity-resistant insulating film on the second main surface of the glass is larger than that of the frame on the second main surface of the glass, and the pressure-resistant humidity-resistant insulating film does not cover the whole second main surface of the glass. The high-voltage resistance of the insulating film enables the solar cell module to be suitable for a high-voltage system, the power generation efficiency of the solar cell module is improved, the moisture resistance function of the insulating film enables the PID effect of the solar cell module under the high-voltage system to be reduced, and the output power of the solar cell module is improved. Meanwhile, the whole surface of the glass is not completely covered by the insulating film, so that the power of the solar cell module is improved. In addition, the solar cell module provided by the embodiment of the invention has the advantages of simple preparation process, improvement of the preparation efficiency of the solar cell module, and reduction of the process manufacturing difficulty and the preparation cost.
The following describes a method for manufacturing a solar cell module and a solar cell module obtained by the method in detail by using several specific examples.
Example 1:
step A1: and cleaning the surface of the glass 10 by using a methanol cleaning solution to remove oil and impurities on the surface of the glass 10.
Step B1: the surface of the glass in the region where the pressure-resistant moisture-resistant insulating film 50 is formed on the glass 10 is subjected to surface activation treatment to promote the breaking activation of the Si — O bond. The formation region of the pressure-resistant wetting insulating film includes a peripheral edge region of one main surface (a-plane) of the glass and four side surfaces (C-plane).
Step C1: and coating a treating agent which is silicone grease on the formation area.
Step D1: under the action of an electric field, nitrogen/oxygen gas is ionized and accelerated in the electric field, and the treating agent in the formation region is bombarded, so that long-chain molecules of the treating agent are broken and bonded on silicon oxide on the glass surface of the formation region, and the pressure-resistant wetting insulation film 50 is formed.
Step E1: the anti-pressure wetting insulating film 50 is heat-treated at a temperature of 150 deg.c for 3min so that the anti-pressure wetting insulating film 50 is firmly combined with the glass 10.
Step F1: and sequentially laminating the front glass, the front packaging adhesive film, the battery piece, the back packaging adhesive film and the back glass, and laminating in a laminating machine to obtain the laminating piece.
Wherein, the front glass adopts glass with a pressure-resistant humidity-resistant insulating film formed through the steps A1 to E1, and the A side provided with the pressure-resistant humidity-resistant insulating film is far away from the cell slice; the back surface is made of glass without a pressure-resistant moisture-resistant insulating film.
The front and back packaging films are Polyolefin (PO) packaging films with resistivity of 1.0 × 10 16 Ω·cm。
Step G1: and a sealant 60 is arranged in the clamping groove of the frame 40.
Step H1: the frame 40 provided with the sealant 60 is mounted on the periphery of the laminate, and then the junction box is mounted on the back glass, so as to prepare the solar cell module shown in fig. 1.
Example 2:
step A2: and cleaning the surface of the glass 10 by using an acetone cleaning solution to remove oil and impurities on the surface of the glass 10.
Step B2: the surface of the glass 10 in the region where the pressure-resistant moisture-resistant insulating film 50 is formed on the glass 10 is subjected to surface activation treatment to promote the breaking and activation of the Si — O bond. The formation region of the moisture-resistant anti-stiction insulating film includes the peripheral edge region of one main surface (a-plane) of the glass and four side surfaces (C-plane).
Step C2: and coating a treating agent which is silicone oil on the forming areas (the surface A and the surface C).
Step D2: under the action of the electric field, nitrogen/oxygen gas is ionized and accelerated in the electric field, and the treating agent in the formation region is bombarded, so that long-chain molecules of the treating agent are broken and bonded to silicon oxide on the glass surface of the formation region, and the pressure-resistant humidity-resistant insulating film 50 is formed.
Step E2: the anti-pressure wetting insulating film 50 is heat-treated at a temperature of 130 deg.c for 5min so that the anti-pressure wetting insulating film 50 is firmly combined with the glass 10.
Step F2: and sequentially laminating the front glass, the front packaging adhesive film, the battery piece, the back packaging adhesive film and the back glass, and laminating in a laminating machine to obtain the laminating piece.
Wherein, the front glass and the back glass are both glass with the pressure-resistant humidity-resistant insulating film formed through the steps A2 to E2, and the A side provided with the pressure-resistant humidity-resistant insulating film is far away from the cell slice.
The front and back packaging films are Polyolefin (PO) packaging films, and the resistivity of the packaging film 20 is 2.0 × 10 16 Ω·cm。
Step G2: and a sealant 60 is arranged in the clamping groove of the frame 40.
Step H2: the frame 40 provided with the sealant 60 is mounted on the periphery of the laminate, and then the junction box is mounted on the back glass, so as to prepare the solar cell module shown in fig. 2.
Example 3:
step A3: and cleaning the surface of the glass 10 by using deionized water cleaning solution to remove oil and impurities on the surface of the glass 10.
Step B3: the surface of the glass 10 in the region where the pressure-resistant moisture-resistant insulating film 50 is formed on the glass 10 is subjected to surface activation treatment to promote the breaking and activation of the Si — O bond. The formation region of the moisture-resistant anti-stiction insulating film includes the peripheral edge regions of the two main surfaces (a-plane and B-plane) of the glass and four side surfaces (C-plane).
Step C3: and coating a treating agent on the forming area, wherein the treating agent is fluorosilicone oil.
Step D3: under the action of an electric field, nitrogen/oxygen gas is ionized and accelerated in the electric field, and the treating agent in the formation region is bombarded, so that long-chain molecules of the treating agent are broken and bonded on silicon oxide on the glass surface of the formation region, and the pressure-resistant wetting insulation film 50 is formed.
Step E3: the moisture resistant resistive insulating film 50 is heat-treated at 60 c for 10min so that the moisture resistant resistive insulating film 50 is firmly bonded to the glass 10.
Step F3: and sequentially laminating the front glass, the front packaging adhesive film, the battery piece, the back packaging adhesive film and the back glass, and laminating in a laminating machine to obtain the laminating piece.
Wherein, the front glass and the back glass are both glass with the pressure-resistant humidity-resistant insulating film formed through the steps A3 to E3.
The front and back packaging films 20 are Polyolefin (PO) packaging films, and the packaging film 20 has a resistivity of 4.0 × 10 16 Ω·cm。
Step G3: and a sealant 60 is arranged in the clamping groove of the frame 40.
Step H3: the frame 40 provided with the sealant 60 is mounted on the periphery of the laminate, and then the junction box is mounted on the back glass, so as to prepare the solar cell module shown in fig. 3.
Example 4:
the steps of this example were identical to those of example 3 except that the heat treatment was carried out at 130 ℃ for 10min in step E4.
Comparative example:
the respective steps of this embodiment are identical to those of embodiment 1 except that the step of producing the pressure-resistant moisture-resistant insulating film 50 on the glass 10 (steps a to E) is not performed.
The PID test of the solar cell module according to the present invention and the untreated conventional solar cell module in each of the above examples was performed according to the standard (IEC TS 62804-1: 2015 at 85 ℃/RH 85%, 96 hours, maximum system voltage 2000V), and the obtained PID attenuation data are specifically shown in table 1 below.
According to the test results, the solar cell module prepared by the preparation method of the solar cell module provided by the embodiment of the invention has the advantages that the pressure-resistant and moisture-resistant insulating film capable of preventing cations from flowing into the cell piece is arranged on the glass, so that the PID effect of the solar cell module under a high-voltage system is remarkably reduced, the tested PID is less than or equal to 5%, and the corresponding standard is met.
The embodiment of the invention provides the following technical schemes and combinations of the technical schemes.
Technical solution 1, a solar cell module includes: a laminate, and a bezel 40 disposed at a side of the laminate;
the laminate comprises a glass (10) having a glass core,
an encapsulation film 20 and a battery sheet 30 disposed on the first major surface of the glass 10,
and a moisture and pressure resistant insulating film 50 disposed on a second main surface of the glass 10 away from the battery piece 30 and on a side surface of the glass 10 close to the frame 40;
wherein the pressure resistant wetting insulation film 50 can prevent cations from flowing into the cell sheet 30;
the covering length of the moisture-resistant and pressure-resistant insulating film 50 on the second main surface of the glass 10 is longer than the covering length of the frame 40 on the second main surface of the glass 10, and the moisture-resistant and pressure-resistant insulating film 50 does not cover the entire second main surface of the glass 10.
In the solar cell module according to claim 2 or 1, a covering length of the pressure-resistant moisture-resistant insulating film 50 on the second main surface of the glass 10 is less than or equal to a distance between the side surface of the cell sheet 30 and the side surface of the glass 10.
Technical solution 3, the solar cell module according to technical solution 1, the laminate further comprising: a pressure-resistant moisture-resistant insulating film 50 disposed on the first main surface of the glass 10, a covering length of the pressure-resistant moisture-resistant insulating film 50 on the first main surface of the glass 10 is longer than a covering length of the frame 40 on the second main surface of the glass 10, and the pressure-resistant moisture-resistant insulating film 50 does not cover the entire first main surface of the glass 10.
Technical solution 4, according to the solar cell module described in technical solutions 1 to 3, the thickness of the pressure-resistant moisture-resistant insulating film 50 is 10nm to 200 nm.
Technical scheme 5, according to the solar cell module described in technical schemes 1 to 3, the anti-piezoresistive moisture insulating film 50 is formed by bonding one or more of silicone oil, fluorosilicone oil, silicone and silicone grease with silicon oxide on the surface of the glass 10.
Technical solution 6, the solar cell module according to technical solution 1, wherein the solar cell module includes a piece of the glass 10, and the glass 10 is disposed on the front surface of the cell sheet 30;
alternatively, the solar cell module includes two pieces of glass 10 respectively disposed on the front side and the back side of the cell sheet 30, and at least one of the second main surfaces of the glass 10 far away from the cell sheet 30 and the side surfaces of the glass 10 close to the frame 40 are provided with the pressure-resistant humidity-resistant insulating film 50.
Technical solution 7, the method for manufacturing a solar cell module according to technical solution 1, comprising:
102, arranging an encapsulation film 20 and a battery piece 30 on the first main surface of the glass 10 in sequence, and forming a laminated piece through lamination;
103, arranging a frame 40 on the side surface of the laminated part;
wherein the pressure resistant wetting insulation film 50 can prevent cations from flowing into the cell sheet 30;
the covering length of the moisture-resistant and pressure-resistant insulating film 50 on the second main surface of the glass 10 is longer than the covering length of the frame 40 on the second main surface of the glass 10, and the moisture-resistant and pressure-resistant insulating film 50 does not cover the entire second main surface of the glass 10.
The method for manufacturing a solar cell module according to claim 8 or 7, wherein the step 101 includes:
step 1-1, cleaning the surface of the glass 10 by using a cleaning solution;
step 1-2, performing surface activation treatment on a formation region of the moisture-blocking resistant insulating film 50 on the glass 10 to activate the Si — O bond breakage on the surface of the glass 10;
step 1-3, adding a treatment agent to the formation region, performing plasma surface treatment on the formation region so that the treatment agent bonds with silicon oxide on the surface of the formation region, and performing heat treatment on the formation region to produce the pressure-resistant wetting insulating film 50.
Technical scheme 9, according to the method for manufacturing a solar cell module described in technical scheme 8, the cleaning solution includes one or more of methanol, acetone, and deionized water.
Technical scheme 11 and the preparation method of the solar cell module according to the technical scheme 8, wherein the heat treatment temperature is 60-150 ℃, and the heat treatment time is 3-10 min.
Technical solution 12, according to the method for manufacturing a solar cell module described in technical solution 7, the encapsulation film 20 is a polyolefin encapsulation film; the encapsulation film 20 has a resistivity of 1.0 x 10 or more 16 Ω·cm。
The method of manufacturing a solar cell module according to claim 13 or 7, wherein the step 103 includes: :
step 3-1, arranging a sealant 60 in the clamping groove of the frame 40;
and 3-2, fixing the laminated part by using the frame 40.
The above steps are provided only for helping to understand the method, structure and core idea of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the principles of the invention, and these changes and modifications also fall within the scope of the appended claims.
Claims (10)
1. A solar cell module, comprising: a laminate, and a bezel (40) disposed at a side of the laminate;
the laminate comprises a glass (10),
an encapsulation film (20) and a battery sheet (30) disposed on a first major surface of the glass (10),
and a moisture and pressure resistant insulating film (50) arranged on a second main surface of the glass (10) far away from the battery piece (30) and on the side surface of the glass (10) close to the frame (40);
wherein the pressure resistant humidity resistant insulating film (50) can prevent cations from flowing into the cell sheet (30);
the covering length of the moisture-resistant and humidity-resistant insulating film (50) on the second main surface of the glass (10) is longer than the covering length of the frame (40) on the second main surface of the glass (10), and the moisture-resistant and humidity-resistant insulating film (50) does not cover the entire second main surface of the glass (10).
2. The solar cell module according to claim 1, wherein the covering length of the pressure-resistant moisture-resistant insulating film (50) on the second main surface of the glass (10) is less than or equal to the distance between the side surface of the cell sheet (30) and the side surface of the glass (10).
3. The solar cell assembly of claim 1 wherein the laminate further comprises: a pressure-resistant wet insulation film (50) disposed on the first main surface of the glass (10), a coverage length of the pressure-resistant wet insulation film (50) on the first main surface of the glass (10) is longer than a coverage length of the frame (40) on the second main surface of the glass (10), and the pressure-resistant wet insulation film (50) does not cover the entire first main surface of the glass (10).
4. The solar cell module according to any one of claims 1 to 3, wherein the thickness of the moisture-resistant pressure-resistant insulating film (50) is 10nm to 200 nm.
5. The solar cell module according to claims 1 to 3, wherein the anti-pressure-resistance moisture-resistance insulating film (50) is formed by bonding one or more of silicone oil, fluorosilicone oil, silicone and silicone grease with silicon oxide on the surface of the glass (10).
6. The solar cell module according to claim 1, characterized in that the solar cell module comprises a piece of the glass (10), the glass (10) being arranged on the front side of the cell sheet (30);
or the solar cell module comprises two pieces of glass (10) which are respectively arranged on the front surface and the back surface of the cell piece (30), and the pressure-resistant wet insulation film (50) is arranged on at least one second main surface of the glass (10) far away from the cell piece (30) and the side surface of the glass (10) close to the frame (40).
7. A method for manufacturing a solar cell module, comprising:
step 101, providing glass (10), wherein the glass (10) is provided with a first main surface, a second main surface opposite to the first main surface and a side surface; forming a pressure-resistant moisture-resistant insulating film (50) on the second main surface and the side surface of the glass (10);
102, arranging an encapsulation film (20) and a battery piece (30) on the first main surface of the glass (10) in sequence, and forming a laminated body through lamination;
103, arranging a frame (40) on the side surface of the laminated part;
wherein the pressure resistant wetting insulation film (50) can prevent cations from flowing into the cell sheet (30);
the covering length of the pressure-resistant moisture-resistant insulating film (50) on the second main surface of the glass (10) is longer than the covering length of the frame (40) on the second main surface of the glass (10), and the pressure-resistant moisture-resistant insulating film (50) does not cover the entire second main surface of the glass (10).
8. The method of claim 7, wherein the step 101 comprises:
step 1-1, cleaning the surface of the glass (10) by using a cleaning solution;
step 1-2, performing surface activation treatment on a formation region of a moisture-blocking resistant insulating film (50) on the glass (10) to break and activate Si-O bonds on the surface of the glass (10);
step 1-3, adding a treating agent to the formation region, performing plasma surface treatment on the formation region so that the treating agent bonds with silicon oxide on the surface of the formation region, and performing heat treatment on the formation region to produce the pressure-resistant wetting insulating film (50).
9. The method according to claim 8, wherein the treatment agent is one or more of silicone oil, fluorosilicone oil, silicone, and silicone grease.
10. The method for manufacturing a solar cell module according to claim 8, wherein the temperature of the heat treatment is 60 ℃ to 150 ℃ and the time of the heat treatment is 3min to 10 min.
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