CN115945497A - Back plate stripping method of photovoltaic module - Google Patents
Back plate stripping method of photovoltaic module Download PDFInfo
- Publication number
- CN115945497A CN115945497A CN202310071940.9A CN202310071940A CN115945497A CN 115945497 A CN115945497 A CN 115945497A CN 202310071940 A CN202310071940 A CN 202310071940A CN 115945497 A CN115945497 A CN 115945497A
- Authority
- CN
- China
- Prior art keywords
- back plate
- photovoltaic module
- stripping
- peeling
- fluorine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 110
- 230000008569 process Effects 0.000 claims abstract description 78
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 66
- 239000011737 fluorine Substances 0.000 claims abstract description 66
- 239000000463 material Substances 0.000 claims abstract description 65
- 238000009659 non-destructive testing Methods 0.000 claims abstract description 25
- 238000004458 analytical method Methods 0.000 claims abstract description 19
- 239000010410 layer Substances 0.000 claims description 105
- 238000012360 testing method Methods 0.000 claims description 92
- 229920002620 polyvinyl fluoride Polymers 0.000 claims description 61
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 60
- 239000002033 PVDF binder Substances 0.000 claims description 35
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 32
- 230000032683 aging Effects 0.000 claims description 28
- 238000002834 transmittance Methods 0.000 claims description 28
- 238000004383 yellowing Methods 0.000 claims description 20
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 claims description 18
- 230000032798 delamination Effects 0.000 claims description 9
- 239000002344 surface layer Substances 0.000 claims description 9
- 238000002329 infrared spectrum Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- 238000004566 IR spectroscopy Methods 0.000 claims description 5
- 230000001066 destructive effect Effects 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 3
- 230000006378 damage Effects 0.000 abstract description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 abstract 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 10
- 239000005020 polyethylene terephthalate Substances 0.000 description 10
- 229920002799 BoPET Polymers 0.000 description 6
- 239000002313 adhesive film Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- 125000001153 fluoro group Chemical group F* 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 229910021419 crystalline silicon Inorganic materials 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229920009638 Tetrafluoroethylene-Hexafluoropropylene-Vinylidenefluoride Copolymer Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 238000012844 infrared spectroscopy analysis Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920001780 ECTFE Polymers 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 150000002221 fluorine Chemical class 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Photovoltaic Devices (AREA)
Abstract
The application provides a method for stripping a back plate of a photovoltaic module, and relates to the technical field of photovoltaic modules. The method for stripping the back plate of the photovoltaic module comprises the following steps: the method comprises the steps of analyzing the components of a back plate of a photovoltaic assembly to be peeled by using a nondestructive testing analysis method, determining whether the back plate contains fluorine, selecting a corresponding back plate peeling process according to whether the back plate contains fluorine, and peeling the back plate of the photovoltaic assembly. By using nondestructive testing without direct damage to the backboard, the component types of the backboard material of the photovoltaic module can be rapidly analyzed and determined, and then the corresponding stripping process is selected according to the backboard materials with different components, so that the photovoltaic modules with different backboard materials are efficiently disassembled and recycled.
Description
Technical Field
The application relates to the technical field of photovoltaic modules, in particular to a method for stripping a back plate of a photovoltaic module.
Background
The design life of a photovoltaic module in a photovoltaic power station is usually 20 years, and with the early construction of the photovoltaic power station, the design life cycle of the photovoltaic power station is reached or approached, and the material reliability of the photovoltaic module is relatively low, and part of the photovoltaic modules do not reach the design life, namely, the photovoltaic module cannot be used. According to the prediction of the international renewable energy resource agency (IRENA), the recovery amount of the global photovoltaic module in 2030 years can reach about 800 ten thousand tons; by 2050, there will be nearly 8000 million tons of photovoltaic modules to be handled globally. Therefore, the decommissioning and recycling of the waste photovoltaic modules are more and more important. At present, materials such as glass, copper, aluminum, silicon, silver, gallium, indium and the like in the photovoltaic module can be recycled, so that the recycled photovoltaic module has important economic value.
In the materials and the structure of the photovoltaic module, the photovoltaic back plate is a protective material used on the back surface of the module and is used for protecting the service life of a battery plate in the module in an outdoor severe environment for 25 years or even longer, the photovoltaic back plate is composed of a multilayer composite structure, most of the materials in the composite structure also contain fluorine materials, so that the back plate on the photovoltaic module has excellent weather resistance, water vapor barrier property, electric insulation property, dimensional stability, tearing resistance and the like. However, if the fluorine-containing back plate is not properly disassembled and disposed, the environment is greatly polluted, so that the clean energy product is not clean due to improper recycling. In addition, when the photovoltaic modules made of different backboard materials are disassembled, the peel strength between the photovoltaic backboard and the EVA adhesive layer in some photovoltaic modules can reach 40N/10mm under the test condition of 180 degrees, and the peel strength can reach more than 120N/10mm in some photovoltaic modules. This allows some of the backsheet material to remain adhered to the photovoltaic cell using the same recycling process.
Therefore, in order to more effectively recycle photovoltaic modules, it is necessary to find a method for peeling back sheets in different photovoltaic modules.
Disclosure of Invention
The application aims to provide a method for stripping a back plate of a photovoltaic assembly.
In order to achieve the above purpose, the technical scheme of the application is as follows:
a method of stripping a back sheet of a photovoltaic module, comprising: and analyzing the components of the back plate of the photovoltaic module to be peeled off by using a nondestructive testing analysis method, determining whether the back plate contains fluorine, selecting a corresponding back plate peeling process according to whether the back plate contains fluorine, and peeling the back plate of the photovoltaic module.
Preferably, the non-destructive inspection analysis method comprises FTIR infrared spectroscopy analysis.
Preferably, if the back plate does not contain fluorine, a fluorine-free back plate stripping process is selected, and the fluorine-free back plate stripping process comprises mechanical stripping or manual stripping.
Preferably, if the back plate contains fluorine, a fluorine-containing back plate stripping process is selected, and the fluorine-containing back plate stripping process comprises the following steps:
and identifying the backboard to be made of PVF (polyvinyl fluoride) or PVDF (polyvinylidene fluoride) according to the detection and analysis result of the nondestructive detection and analysis, and selecting a corresponding fluorine-containing backboard stripping process according to the material.
Further preferably, the selecting a corresponding fluorine-containing back plate peeling process according to the material includes:
if the back plate is made of PVF or PVDF, performing nondestructive testing on the back plate, then comparing and analyzing the nondestructive testing result of the back plate with the nondestructive testing results of the PVF or PVDF standard back plate and the PVF or PVDF aging model back plate, confirming the actual service age of the back plate, and selecting a corresponding back plate stripping process according to the actual service age.
More preferably, the non-destructive test comprises at least one of an ultraviolet transmittance test, a light transmittance test, a yellowing index test, and a C-F bond content test;
the PVF or PVDF aging model back plate comprises PVF or PVDF standard aging back plates corresponding to different aging times.
More preferably, the selecting the corresponding back plate peeling process according to the actual age further comprises:
and establishing a process database, wherein the process database comprises corresponding nondestructive testing results of the back plates made of different materials under different use ages and a back plate stripping process.
Preferably, the back sheet of the photovoltaic module comprises a surface layer, an intermediate layer and an inner layer, and the peeling of the back sheet comprises:
and peeling the back plate integrally or peeling the back plate in a layering way.
Further preferably, the performing delamination comprises:
before each stripping, at least one of FTIR infrared spectrum test, ultraviolet transmittance test, light transmittance test, yellowing index test and C-F bond content test is carried out on the backboard to be stripped, the actual service age of the backboard to be stripped is confirmed, and a corresponding backboard stripping process is selected.
Preferably, the back sheet of the photovoltaic module is made of PVF material, and when the actual usage age is less than 0.5 year, the process parameters for peeling off the back sheet of the photovoltaic module include: softening temperature of the surface layer of the back plate: 170 ℃ or more, and the softening temperature of the back plate-EVA: more than or equal to 80 ℃, stripping speed: 1cm/min-3cm/min; peeling force: 130N/10mm-170N/10mm;
when the back plate of the photovoltaic module is made of PVF (polyvinyl fluoride) material and the actual use age is 15 years, the technological parameters for stripping the back plate of the photovoltaic module comprise: softening temperature of the surface layer of the back plate: not less than 150 ℃, back sheet-EVA softening temperature: the temperature is more than or equal to 70 ℃, and the stripping speed is as follows: 2cm/min-5cm/min; peeling force: 50N/10mm-70N/10mm.
The beneficial effect of this application:
this application is through using the nondestructive test who does not have direct destruction action to photovoltaic module, can be fast to the backplate material composition analysis of the photovoltaic module of different grade type, then confirm whether contain fluorine in its backplate, then select corresponding peeling process according to whether contain fluorine, realized dismantling the recovery to the photovoltaic module of different backplate materials more high-efficiently, especially to fluorine-containing old and useless photovoltaic backplate, through the stripping method of this application, can carry out complete recovery processing with it, prevent the follow-up polluted environment of fluorine-containing backplate.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention.
FIG. 1 is a flow chart of the stripping of a photovoltaic module back plate to be disassembled;
FIG. 2 is a flow chart of a selection of a stripping process for a photovoltaic module back panel to be disassembled;
FIG. 3 is a flow chart of a delamination of a PVF back sheet of a photovoltaic module to be disassembled;
FIG. 4 is a graph of yellowing indexes corresponding to PVF standard backplates with different service lives under standard irradiation dose;
FIG. 5 is a pictorial representation of certain photovoltaic modules of comparative example 1 after being integrally stripped;
fig. 6 is a schematic view of the PVDF photovoltaic backsheet in example 3 after peeling the outermost layer.
Detailed Description
The terms as used herein:
"prepared from … …" is synonymous with "comprising". As used herein, the terms "comprises," "comprising," "includes," "including," "has," "having," "contains" or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
The conjunction "consisting of … …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of … …" appears in a clause of the subject of the claims and not immediately after the subject, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4," "1 to 3," "1 to 2 and 4 to 5," "1 to 3 and 5," and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.
In these embodiments, unless otherwise specified, "and/or" is used to indicate that one or both of the stated conditions may occur, e.g., a and/or B includes (a and B) and (a or B).
The application provides a method for stripping a back plate of a photovoltaic module, which comprises the following steps: the method comprises the steps of analyzing the components of a back plate of a photovoltaic assembly to be peeled by using a nondestructive testing analysis method, determining whether the back plate contains fluorine, selecting a corresponding back plate peeling process according to whether the back plate contains fluorine, and peeling the back plate of the photovoltaic assembly.
Photovoltaic module generally refers to solar photovoltaic module, wherein except the frame, main material and structure among the photovoltaic module mainly have from top to bottom: glass, a photovoltaic adhesive film (mainly an EVA material), a crystalline silicon solar cell, a photovoltaic adhesive film, a back plate and the like. The photovoltaic back plate is a packaging material on the back of the photovoltaic module, and is mainly used for resisting the corrosion of the environment such as damp and hot to the materials such as a battery plate and a packaging adhesive film, blocking oxygen to prevent the internal oxidation of the module, and playing the roles of weather resistance and insulation protection.
For the structure of the photovoltaic back plate, the composite layer film is the mainstream technology, and the core of the composite layer film mainly has a three-layer structure, which comprises:
(1) Outer protective layer (weather-resistant layer): for good weather resistance, most of the outer layer materials are fluorine-containing, and specifically, the outer layer materials can be divided into a fluorine film layer and a fluorine coating layer, and two common films in the fluorine film layer are PVF (polyvinyl fluoride, commonly called T film) and PVDF (polyvinylidene fluoride, commonly called K film). Further, there are an ETFE film (ethylene-tetrafluoroethylene copolymer), an ECTFE film (ethylene-vinylidene fluoride copolymer), a THV film (tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymer), and the like, but they have not been applied to photovoltaic back sheets on a large scale due to raw material supply capacity and cost. The fluorine-containing film layer has good weather resistance mainly due to the fact that C-F bonds exist in the fluorine-containing film layer, the C-F bonds have high bonding energy (485 KJ/mol), the C-F bonds are the largest in organic compound covalent bonds, and F atoms have extremely low polarizability, high electronegativity and smaller van der Waals radii.
(2) An intermediate layer: the support function is achieved, the high and low temperature resistance is achieved, the mechanical performance is stable, the electric insulation is excellent, the creep resistance, the fatigue resistance, the friction resistance and the dimensional stability are good, the gas and steam permeability is low, and the PET material (polyethylene terephthalate) is generally used.
(3) Inner layer (laminate tie layer): a modified fluorine-containing material or a highly adhesive EVA, PE, PA film or the like is generally used because of its excellent adhesion to a photovoltaic adhesive film, but a fluorine-containing film layer is often used as a lamination adhesive layer in the market.
For fluorine-containing backsheets, because the fluorocarbon polymer has a strong chemical structure, typical landfill treatments cannot degrade the composition even for thousands of years, and if incinerated, colorless, pungent, toxic hydrogen fluoride gas is produced. Therefore, for old and useless photovoltaic module, in order to prevent fluorine-containing photovoltaic backplate polluting the environment, need when dismantling old and useless subassembly, peel off fluorine-containing backplate as far as possible totally, prevent its adhesion on the battery piece, and then discharge in the environment along with battery piece treatment waste liquid.
The photovoltaic module is mainly prepared by a hot pressing process, the laid battery module is placed in a laminating machine, air in the module is pumped out by vacuumizing and laminated, and the EVA is melted by heating to bond the battery piece, the glass and the back plate together to form a sealing module. After lamination, the peel strength between the photovoltaic back plate and the adhesive film EVA material has a large difference due to the difference of the back plate materials. In addition, in the structure of the photovoltaic back plate, silica gel is used as an adhesive between layers, so that the peel strength between the back plate material and the silica gel can reach more than 10N/10mm under the test condition of 180 degrees.
In order to recover the crystalline silicon photovoltaic modules of different product categories more effectively and more environmentally, the crystalline silicon photovoltaic modules to be stripped are placed on the stripping device, the components of the back plates of the photovoltaic modules to be stripped are analyzed by using a nondestructive testing analysis test method, then corresponding back plate stripping processes are selected according to the component analysis results of the back plates, and the back plates of the photovoltaic modules are stripped, as shown in fig. 1.
Further, whether the photovoltaic back sheet to be stripped contains fluorine or not can be confirmed according to the composition analysis result of the back sheet, and the selection is carried out according to whether the photovoltaic back sheet contains fluorine or not. As shown in fig. 2, according to the detection result of the nondestructive testing analysis of the photovoltaic back sheet, it is determined whether the photovoltaic back sheet contains fluorine, if the back sheet does not contain fluorine, the back sheet is a fluorine-free back sheet, and then a peeling process in a corresponding manner, such as mechanical peeling, manual peeling, etc., is performed according to the fluorine-free back sheet. And if the back plate contains fluorine according to the component detection result of the photovoltaic back plate, selecting a stripping process of the fluorine-containing back plate to strip the photovoltaic back plate.
In some alternatives of the present application, the non-destructive inspection analysis method comprises an FTIR infrared spectroscopy analysis method. The method has the characteristics that: (1) fast; (2) non-contact; (3) no direct damage to the backing plate; (4) A qualitative measurement result can be formed, whether the back plate contains fluorine or does not contain fluorine can be judged, and particularly, the fluorine-containing back plate can be judged to be a PVF back plate, a PVDF back plate or other back plate materials; (5) According to the comparison between the generated infrared absorption spectrum and the corresponding standard spectrum, the component types of the materials contained in the back plate can be rapidly determined.
It should be noted that, in a photovoltaic cell product, a plurality of different crystalline silicon solar cells are arranged, and voids often remain between the different cells, and when a hot pressing process is performed subsequently, air between the cells is exhausted, and only a glass plate, an EVA glue layer and a back plate remain in the voids, while the EVA glue layer and the glass are substantially transparent. Therefore, when nondestructive testing is performed, the testing can be performed through the pores between the battery pieces, and the composition of the back sheet material can be confirmed.
In some preferred embodiments, after confirming that the photovoltaic back sheet to be peeled contains fluorine, it is further required to identify whether the back sheet is made of PVF or PVDF according to the result of nondestructive testing analysis, and then select a corresponding fluorine-containing back sheet peeling process according to the actual fluorine-containing material.
Specifically, if the photovoltaic back plate is determined to be made of PVF material after FTIR infrared spectrum analysis test results, other types of nondestructive tests need to be performed on the photovoltaic back plate to determine the actual aging service age of the photovoltaic module, and then the corresponding back plate stripping process is selected according to the actual aging service age.
Optionally, the other types of non-destructive tests include at least one of an ultraviolet transmittance test, a light transmittance test, a yellowing index test, and a C-F bond content test.
When the actual aging service age of the photovoltaic module is determined, a standard back plate made of PVF (namely, a PVF back plate which is not subjected to aging treatment) needs to be subjected to nondestructive testing; meanwhile, the PVF aging model backplane also needs to be subjected to nondestructive testing, that is, a plurality of PVF backplates with different aging times are tested, for example, the PVF backplane aged for 1 year, the PVF backplane aged for 2 years, the PVF backplane aged for 3 years, …, the PVF backplane aged for 24 years, and the PVF backplane aged for 25 years can be respectively tested; or testing a PVF back plate aged for 5 years, a PVF back plate aged for 10 years, a PVF back plate aged for 15 years, a PVF back plate aged for 20 years and a PVF back plate aged for 25 years respectively; the test may be performed on a PVF backplane aged for 1 year, a PVF backplane aged for 3 years, a PVF backplane aged for 5 years, a PVF backplane aged for 10 years, and a PVF backplane aged for 25 years, respectively.
After the test result of the photovoltaic backboard to be peeled off, the test result of the PVF standard backboard and the test result of the PVF aging model backboard are obtained, the test result of the photovoltaic backboard to be peeled off is compared with other test results for analysis, the actual use age, namely the aging degree, of the backboard to be peeled off can be confirmed, and the corresponding backboard peeling process is selected according to the actual use age.
It can be understood that, the back sheet material will gradually generate yellowing and other reactions along with the change of the external environment, so that the nondestructive testing results of the back sheets with different aging use ages will also show a certain rule, and the higher the aging degree is, that is, the longer the actual use age is, the lower the softening temperature, the peeling force and the like required by the back sheet during peeling. For example, the light transmittance test results for a brand new backsheet are generally in certain ranges and require certain temperatures and peel forces when peeled; on the other hand, in the case of the back sheet placed outdoors for several years, since yellowing occurs, the test result is lowered to a certain range when the transmittance test is performed, and the temperature and the peeling force required when peeling is performed are also lowered to some extent. Therefore, the aging degree of the backboard to be stripped, namely the actual use age, can be obtained by comparing the test results of the backboard to be stripped with the test results of the backboards with different aging degrees, and then the corresponding stripping process is selected, so that complete stripping can be realized, and the energy loss during stripping can be greatly reduced.
Certainly, if the photovoltaic back panel is determined to be made of the PVDF material, in addition to performing the nondestructive test on the photovoltaic back panel to be peeled off, the nondestructive test on the PVDF standard back panel and the PVDF aging model back panel is also required, the actual use age of the PVDF back panel to be peeled off is determined by performing comparative analysis on the test result, and then the corresponding back panel peeling process is selected according to the actual use age.
In some preferred embodiments, the disassembling process of the back plate according to the age of the practical use further comprises: and establishing a process database, wherein the process database comprises corresponding nondestructive testing results of the back plates made of different materials under different use ages and corresponding back plate stripping processes.
It can be understood that, by establishing a process database for various different backsheet materials, only the photovoltaic backsheet to be peeled off can be detected, and then, the actual usage age of the backsheet corresponding to the actual test result and the corresponding peeling process can be quickly compared and analyzed through data in the process database. Therefore, the back plate can be quickly and accurately peeled off, and the disassembling efficiency of the photovoltaic module is greatly accelerated.
In an optional mode of the present application, the backsheet of the photovoltaic module includes a surface layer, an intermediate layer, and an inner layer, and thus the backsheet of the photovoltaic module is peeled off, specifically including: and peeling the back plate integrally or peeling the back plate layer by layer.
It should be noted that most of the fluorine-containing photovoltaic back panels prepared in the existing production processes are made of a TPT material (an outer layer is a fluorine-containing PVF film layer, a middle layer is a fluorine-free PET film layer, and an inner layer is a fluorine-containing PVF film layer) or a KPK material (an outer layer is a fluorine-containing PVDF film layer, a middle layer is a fluorine-free PET film layer, and an inner layer is a fluorine-containing PVDF film layer). Therefore, the fluorine-containing back plate and the EVA film in the photovoltaic module can be disassembled and peeled off at one time, and the different layers of the fluorine-containing back plate and the different layers can be further peeled off in a layering manner, so that the fluorine-containing back plate material can be recovered more accurately.
In a preferred embodiment, the delamination includes: before each stripping, at least one of FTIR infrared spectrum test, ultraviolet transmittance test, light transmittance test, yellowing index test and C-F bond content test is carried out on the backboard to be stripped, the actual service age of the backboard to be stripped is confirmed, and a corresponding backboard stripping process is selected.
The specific flow chart of delamination is shown in fig. 3. After the fluorine-containing back plate of which the photovoltaic back plate is made of the PVF material is determined according to the FTIR infrared test result, the infrared spectrum result can be further analyzed to determine what the specific component material of the non-fluorine-containing intermediate layer is. Before the first layer is stripped, the back plate of the photovoltaic module is subjected to ultraviolet transmittance test, light transmittance test, yellowing index test and C-F bond content test, then the actual use age of the PVF material of the outermost layer is found from a process database, and then the stripping process of the PVF film layer and the middle layer is selected correspondingly to strip the outermost layer of the back plate.
Then, when the second layer of the photovoltaic back sheet, i.e., the intermediate layer not containing fluorine, is peeled off after the outermost layer of the back sheet is absent, FTIR infrared test may be performed to determine the specific composition materials of the intermediate layer and the inner layer. Most of the non-fluorine containing intermediate layers are of PET and the inner layer is substantially the same as the outermost layer, but it is not excluded that individual manufacturers do not use a fluorine containing film layer in the inner layer and therefore need to determine this by non-destructive testing by FTIR. After the middle layer is determined to be made of the PET material and the inner layer is made of the PVF material containing fluorine, light transmittance testing and yellowing index testing are carried out, then the actual use age of the middle layer is found from a process database, and then the middle layer of the back plate is peeled by selecting the peeling process of the corresponding PET film layer and the inner layer.
And then, when the remaining inner layer of the photovoltaic backboard is stripped, after the material of the film layer is determined to be PVF material, carrying out ultraviolet transmittance test, light transmittance test, yellowing index test and C-F bond content test on the photovoltaic module of the backboard with the remaining inner layer film, finding out the actual service age of the inner layer from a process database, selecting a stripping process of the corresponding PVF film layer and the EVA adhesive film, and stripping the inner layer of the backboard.
In an optional embodiment of the present application, if the back sheet of the photovoltaic module is a PVF back sheet and the service life is less than 0.5 years, the process parameters for peeling off the back sheet of the photovoltaic module include: softening temperature of the surface layer of the back plate: 170 ℃ or more, the back sheet-EVA softening temperature: more than or equal to 80 ℃, stripping speed: 1cm/min-3cm/min; peeling force: 130N/10mm-170N/10mm. Further, if the whole peeling is carried out, the peeling depth is 300 μm to 400 μm; when delamination is performed, the peeling depth of the outermost layer is 35 μm to 45 μm, the peeling depth of the intermediate layer is 250 μm to 300 μm, and the peeling depth of the inner layer is 35 μm to 45 μm.
In an optional embodiment of the present application, if the backsheet of the photovoltaic module is a PVF backsheet and is used for 15 years, the process parameters for peeling the backsheet of the photovoltaic module include: softening temperature of the surface layer of the back plate: not less than 150 ℃, back sheet-EVA softening temperature: at least 70 ℃, peeling speed: 2cm/min-5cm/min; peeling force: 50N/10mm-70N/10mm.
Embodiments of the present invention will be described in detail below with reference to specific examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
The embodiment provides a method for stripping a back plate of a photovoltaic module, which specifically comprises the following steps:
in a pile of photovoltaic module that need disassemble, select one of them photovoltaic module, demolish photovoltaic module's aluminium frame and terminal box earlier through mechanical means after, carry out the nondestructive test of FTIR infrared spectrum to remaining photovoltaic module again, it does not contain fluorine in this photovoltaic module's the backplate to have confirmed through the testing result, consequently select the technology that machinery was demolishd, carry out whole peeling off to the backplate on this photovoltaic module.
Example 2
The embodiment provides a method for stripping a back plate of a photovoltaic module, which specifically comprises the following steps:
in a pile of same batch of scrapped same type photovoltaic modules, 3 photovoltaic modules are selected, after an aluminum outer frame and a junction box of each photovoltaic module are removed by mechanical means, nondestructive testing of FTIR infrared spectroscopy is carried out on the 3 photovoltaic modules respectively, the testing results show that the back plates of the photovoltaic modules in the batch contain fluorine, and the back plates are further analyzed and found to contain PVF materials. Therefore, the 3 photovoltaic modules to be disassembled are further subjected to an ultraviolet transmittance test, a light transmittance test, a yellowing index test and a C — F bond content test, and then compared with the related test results of the PVF standard backsheet and PVF backsheets used outdoors for 3 years, 5 years, 8 years, 10 years, 15 years, 20 years, 25 years.
Wherein, fig. 4 is a yellowing index diagram corresponding to PVF standard backplates with different service lives under standard irradiation. And comparing the tested yellowing index of the photovoltaic module backboard to be disassembled with the yellowing index under the standard irradiation amount to obtain the photovoltaic module to be disassembled, wherein the service life of the photovoltaic module to be disassembled is about 12 years, and the photovoltaic module belongs to the middle period of the life cycle of the photovoltaic module. Then adjusting the overall stripping technological parameters of the back plate according to the service life as follows: the softening temperature of the back plate-EVA layer is 155 ℃, the peeling speed is 2.2cm/min, and the peeling force is 67N/10mm. And performing FTIR infrared spectroscopy and C-F bond content test on the photovoltaic module after the back plate is stripped, and confirming that no fluorine element exists on the stripped photovoltaic module.
Example 3
The present embodiment provides a method for peeling off a back sheet of a photovoltaic module, which is the same as embodiment 2 except that: and after nondestructive testing through FTIR infrared spectroscopy, confirming that the photovoltaic modules in the same batch are the back plates made of PVDF materials, and then carrying out layered stripping on the back plates.
Firstly establishing a process database, and respectively carrying out ultraviolet transmittance test, light transmittance test, yellowing index test and C-F bond content test on standard back plates made of different materials such as PVDF (polyvinylidene fluoride), PET (polyethylene terephthalate), PA (polyamide) and the like, and back plates made of different materials and used for 1 year, 2 years, 3 years, …, 24 years and 25 years in an outdoor environment, and simultaneously testing the peeling process between PVDF and PET corresponding to different aging degrees, the peeling process between PVDF and EVA film layers with different aging degrees and the like. These test results are recorded in a process database along with the corresponding lift-off process data.
Then, preparing to peel off the outermost layer of the photovoltaic back sheet to be peeled off: firstly, confirming that the outermost layer and the middle layer of the photovoltaic back plate to be stripped are respectively made of PVDF (polyvinylidene fluoride) material and PET (polyethylene terephthalate) material through an FTIR (infrared Fourier transform infrared spectroscopy) infrared spectrum test result, then carrying out ultraviolet transmittance test, light transmittance test, yellowing index test and C-F bond content test on the photovoltaic module to be stripped, finding out the actual aging service time of the corresponding PVDF film layer and the stripping process between the PVDF film layer and the PET film layer corresponding to the aging time from a process database according to the test result, and stripping the outermost layer of the back plate according to the stripping process.
Stripping the intermediate layer of the photovoltaic back sheet: according to the FTIR infrared spectrum test result, determining that the middle layer and the inner layer are respectively made of a PET material and a PVDF material, then continuing to perform light transmittance test and yellowing index test on the photovoltaic module, meanwhile, finding out the actual aging use time of the PET film layer and the stripping process between the PET film layer and the PVDF film layer corresponding to the actual aging use time from a process database, and stripping the middle layer of the back plate according to the stripping process.
Stripping an inner layer of the photovoltaic back sheet: and after confirming that the inner layer of the photovoltaic back plate is made of PVDF, carrying out ultraviolet transmittance test, light transmittance test, yellowing index test and C-F bond content test on the photovoltaic modules only with the remaining inner layer of the back plate, finding out the actual aging use time of the PVDF film layer and the stripping process between the PVDF film layer and the EVA film layer corresponding to the time from a process database, and stripping the inner layer of the back plate according to the stripping process.
Wherein, the technological parameters of the delamination are as follows: the softening temperature of the film layer when the outermost layer is peeled is 160 ℃, the peeling speed is 3cm/min, the peeling force is 67N/10mm, the softening temperature of the film layer when the middle layer is peeled is 155 ℃, the peeling speed is 4.2cm/min, the peeling force is 60N/10mm, the softening temperature of the film layer when the inner layer is peeled is 150 ℃, the peeling speed is 4.5cm/min, and the peeling force is 55N/10mm.
And after the delamination is finished, the photovoltaic module without the back plate is subjected to FTIR (infrared Fourier transform) infrared spectroscopy and C-F bond content test, and the photovoltaic module after delamination is confirmed to have no fluorine element.
Comparative example 1
The present comparative example provides a method for stripping a backsheet of a photovoltaic module, specifically comprising: in a pile of different types of photovoltaic modules to be disassembled, after the aluminum outer frame and the junction box of the photovoltaic modules are firstly disassembled by mechanical means, the mechanical disassembling process is selected for the rest photovoltaic modules, so that the back plate is integrally stripped, and the integrally stripped technological parameters are as follows: the softening temperature of the back plate-EVA layer is 155 ℃, the peeling speed is 3cm/min, and the peeling force is 60N/10mm.
Fig. 5 is a physical diagram of some photovoltaic modules in comparative example 1 after being peeled off integrally, and it is obvious that the back sheet is peeled off incompletely, and a part of the back sheet material is still adhered to the cell sheet. Fig. 6 is a real image of the photovoltaic module in example 3 after the outermost layer of the backsheet is peeled, and it can be seen that no significant residue remains after the outermost layer is peeled. This has also shown that using the backplate peeling method of this application, realized dismantling the recovery to the photovoltaic module of different backplate materials, especially to fluoric old and useless photovoltaic backplate, can carry out complete recovery processing with it, prevent the follow-up polluted environment of fluoric backplate.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Moreover, those of skill in the art will appreciate that while some embodiments herein include some features included in other embodiments, not others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (10)
1. A method for stripping a back plate of a photovoltaic module is characterized by comprising the following steps:
the method comprises the steps of analyzing the components of a back plate of a photovoltaic assembly to be peeled by using a nondestructive testing analysis method, determining whether the back plate contains fluorine, selecting a corresponding back plate peeling process according to whether the back plate contains fluorine, and peeling the back plate of the photovoltaic assembly.
2. The method of stripping a backsheet of a photovoltaic module of claim 1, wherein said non-destructive inspection analysis method comprises FTIR infrared spectroscopy.
3. The method for peeling back sheet of photovoltaic module according to claim 1, wherein if the back sheet does not contain fluorine, a fluorine-free back sheet peeling process is selected, and the fluorine-free back sheet peeling process comprises mechanical peeling or manual peeling.
4. The method for stripping the back sheet of the photovoltaic module according to claim 1, wherein if the back sheet contains fluorine, a fluorine-containing back sheet stripping process is selected, and the fluorine-containing back sheet stripping process comprises:
and identifying the backboard to be made of PVF material or PVDF material according to the detection and analysis result of the nondestructive detection and analysis, and selecting a corresponding fluorine-containing backboard stripping process according to the material.
5. The method of claim 4, wherein selecting the corresponding fluorine-containing backsheet lift-off process based on the material comprises:
and if the back plate is made of PVF or PVDF, performing nondestructive testing on the back plate, then comparing and analyzing the nondestructive testing result of the back plate with the nondestructive testing results of the PVF or PVDF standard back plate and the PVF or PVDF aging model back plate, confirming the actual use age of the back plate, and selecting a corresponding back plate stripping process according to the actual use age.
6. The method of stripping a backsheet of a photovoltaic module of claim 5, wherein said non-destructive testing comprises at least one of an ultraviolet transmittance test, a light transmittance test, a yellowing index test, and a C-F bond content test;
the PVF or PVDF aging model back plate comprises PVF or PVDF standard aging back plates corresponding to different aging times.
7. The method of stripping a backsheet from a photovoltaic module of claim 5 wherein said selecting a corresponding backsheet stripping process based on said age of actual use further comprises:
and establishing a process database, wherein the process database comprises corresponding nondestructive testing results of the back plates made of different materials under different use ages and a back plate stripping process.
8. The method of peeling a backsheet of a photovoltaic module according to claim 1, wherein the backsheet of the photovoltaic module includes a surface layer, an intermediate layer, and an inner layer, and the peeling of the backsheet includes:
and peeling the back plate integrally or peeling the back plate layer by layer.
9. The method of stripping a backsheet of a photovoltaic module of claim 8, wherein said performing a delamination comprises:
before each stripping, at least one of FTIR infrared spectrum test, ultraviolet transmittance test, light transmittance test, yellowing index test and C-F bond content test is carried out on the backboard to be stripped, the actual service age of the backboard to be stripped is confirmed, and a corresponding backboard stripping process is selected.
10. The method for peeling the back sheet of the photovoltaic module according to any one of claims 1 to 9, wherein the back sheet of the photovoltaic module is made of PVF material, and the process parameters for peeling the back sheet of the photovoltaic module when the actual service age is less than 0.5 year comprise: softening temperature of the surface layer of the back plate: 170 ℃ or more, the back sheet-EVA softening temperature: more than or equal to 80 ℃, stripping speed: 1cm/min-3cm/min; peeling force: 130N/10mm-170N/10mm;
the photovoltaic module back plate is made of PVF (polyvinyl fluoride) material and the actual use age is 1 year, and the process parameters for stripping the photovoltaic module back plate comprise: softening temperature of the surface layer of the back plate: not less than 150 ℃, back sheet-EVA softening temperature: the temperature is more than or equal to 70 ℃, and the stripping speed is as follows: 2cm/min-5cm/min; peeling force: 50N/10mm-70N/10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310071940.9A CN115945497B (en) | 2023-02-01 | 2023-02-01 | Backboard stripping method of photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310071940.9A CN115945497B (en) | 2023-02-01 | 2023-02-01 | Backboard stripping method of photovoltaic module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115945497A true CN115945497A (en) | 2023-04-11 |
| CN115945497B CN115945497B (en) | 2024-06-25 |
Family
ID=87297891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310071940.9A Active CN115945497B (en) | 2023-02-01 | 2023-02-01 | Backboard stripping method of photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115945497B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202316491U (en) * | 2011-11-07 | 2012-07-11 | 英利集团有限公司 | Device for photovoltaic component recycling |
| WO2021077479A1 (en) * | 2019-10-25 | 2021-04-29 | 常州瑞赛环保科技有限公司 | Method for disassembling photovoltaic module |
| CN114769274A (en) * | 2022-05-16 | 2022-07-22 | 常州川海环保科技有限公司 | Photovoltaic module layering stripping and recycling device |
| WO2022167857A1 (en) * | 2021-02-04 | 2022-08-11 | National University Of Tainan | Solar cell module recycling apparatus and recycling method therefor |
| CN115338225A (en) * | 2022-08-16 | 2022-11-15 | 常州工学院 | Waste photovoltaic module fluorine-containing back plate harmless treatment device |
| CN115430692A (en) * | 2022-09-03 | 2022-12-06 | 宁夏大学 | Novel method for separating and recycling retired photovoltaic module |
-
2023
- 2023-02-01 CN CN202310071940.9A patent/CN115945497B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202316491U (en) * | 2011-11-07 | 2012-07-11 | 英利集团有限公司 | Device for photovoltaic component recycling |
| WO2021077479A1 (en) * | 2019-10-25 | 2021-04-29 | 常州瑞赛环保科技有限公司 | Method for disassembling photovoltaic module |
| WO2022167857A1 (en) * | 2021-02-04 | 2022-08-11 | National University Of Tainan | Solar cell module recycling apparatus and recycling method therefor |
| CN114769274A (en) * | 2022-05-16 | 2022-07-22 | 常州川海环保科技有限公司 | Photovoltaic module layering stripping and recycling device |
| CN115338225A (en) * | 2022-08-16 | 2022-11-15 | 常州工学院 | Waste photovoltaic module fluorine-containing back plate harmless treatment device |
| CN115430692A (en) * | 2022-09-03 | 2022-12-06 | 宁夏大学 | Novel method for separating and recycling retired photovoltaic module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115945497B (en) | 2024-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1292490C (en) | Regeneration method for solar cell module and solar cell module | |
| Wu et al. | Degradation of interfacial adhesion strength within photovoltaic mini‐modules during damp‐heat exposure | |
| US20120097219A1 (en) | Light weight solar cell modules | |
| JP4738167B2 (en) | Disassembly method of solar cell module | |
| WO2012140585A1 (en) | Encapsulating polymeric multilayer film for cells for photovoltaic modules, and protective integrated sheet, of the type of a backsheet or frontsheet, comprising such film | |
| CN102376805A (en) | Solar cell backplane and manufacturing method thereof | |
| Julien et al. | Characterizing photovoltaic backsheet adhesion degradation using the wedge and single cantilever beam tests, Part II: Accelerated tests | |
| Pern et al. | Adhesion strength study of EVA encapsulants on glass substrates | |
| Julien et al. | Characterizing photovoltaic backsheet adhesion degradation using the wedge and single cantilever beam tests, Part I: Field Modules | |
| Miller et al. | Degradation in photovoltaic encapsulation strength of attachment: Results of the first PVQAT TG5 artificial weathering study | |
| CN115945497B (en) | Backboard stripping method of photovoltaic module | |
| JP2011091081A (en) | Back protective sheet for solar cell, and solar cell module | |
| Oreski | Co-extruded backsheets for PV modules: Past approaches and recent developments | |
| CN105552168B (en) | The Forecasting Methodology of the packaging effect of the encapsulating material of solar photovoltaic assembly | |
| Perez et al. | Thermomechanical and sequential stress performance of photovoltaic backsheets | |
| JP2016036756A (en) | Recycling method of solar cell module | |
| WO2016121990A1 (en) | Sealing material sheet for solar battery module and solar battery module | |
| CN111900220A (en) | Photovoltaic module laminating method and photovoltaic module | |
| WO2013037640A1 (en) | Method for producing a laminate of photovoltaic cells and pressure-sensitive adhesive films by means of a release film | |
| Glassmaker et al. | Alumina tie layer promotes environmental durability of FEP adhesion to EVA | |
| CN110113002B (en) | Method for testing ultraviolet resistance of bonding surface of photovoltaic back plate | |
| Al Hasan et al. | Arrhenius Analysis of the Degradation Modes in BackFLIP Study of Emerging Photovoltaic Backsheets | |
| CN215184007U (en) | Front plate of photovoltaic cell assembly and photovoltaic cell assembly | |
| KR101721577B1 (en) | Backsheet for solor cells having Polyvinylidene fluoride film | |
| Li et al. | Re-use of c-Si solar cells from failed PV modules |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |