CN114709286A - Photovoltaic module for realizing light transmission and collection of photovoltaic cell gaps - Google Patents
Photovoltaic module for realizing light transmission and collection of photovoltaic cell gaps Download PDFInfo
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- CN114709286A CN114709286A CN202210337957.XA CN202210337957A CN114709286A CN 114709286 A CN114709286 A CN 114709286A CN 202210337957 A CN202210337957 A CN 202210337957A CN 114709286 A CN114709286 A CN 114709286A
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- eva adhesive
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 23
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims abstract description 88
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 88
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 88
- 239000002313 adhesive film Substances 0.000 claims abstract description 32
- 230000003044 adaptive effect Effects 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 57
- 239000000853 adhesive Substances 0.000 claims description 32
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- 239000003292 glue Substances 0.000 claims description 6
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- 238000004140 cleaning Methods 0.000 claims description 4
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- 238000010849 ion bombardment Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 238000007781 pre-processing Methods 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 claims description 3
- 238000010248 power generation Methods 0.000 abstract description 5
- 238000004806 packaging method and process Methods 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 8
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- 239000011159 matrix material Substances 0.000 description 6
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- 229920006280 packaging film Polymers 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- -1 polyethylene vinyl acetate Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
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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
- H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
- H01L31/0547—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
Abstract
The invention relates to the technical field of photovoltaic power generation, and provides a photovoltaic module for realizing the light transmission and collection of gaps of photovoltaic cells, which comprises an EVA (ethylene vinyl acetate) adhesive film, a plurality of photovoltaic cells and a back plate, wherein the back plate comprises a plurality of areas adaptive to the photovoltaic cells; the light-gathering curved surface can reflect and gather sunlight which penetrates through the EVA adhesive film and irradiates the light-gathering curved surface to the photovoltaic cell piece. The invention sets the light-gathering curved surface at the boundary gap of the photovoltaic cell piece of the back plate, reflects the sunlight at the position to the photovoltaic cell piece for utilization by the light-gathering curved surface under the reflection and convergence action of the light-gathering curved surface, and makes the light-gathering curved surface into the microstructure, so that certain focusing action is formed during reflection, the reflected sunlight is gathered, and the utilization rate of solar energy is improved.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic module for realizing light transmission and collection of gaps among photovoltaic cells.
Background
Photovoltaic power generation utilizes solar energy to generate electricity, and utilizes the photovoltaic effect of a semiconductor interface to directly convert light energy into electric energy. The photovoltaic power generation equipment mainly comprises three parts, namely a solar cell panel (photovoltaic module), a controller and an inverter, wherein the solar cell panel is packaged and protected after photovoltaic cells are connected in series to form a large-area solar cell, and then the photovoltaic power generation equipment is formed by matching with components such as a power controller and the like.
When the photovoltaic cell pieces are connected in series and assembled, gaps can exist between the adjacent photovoltaic cell pieces, when the photovoltaic cell pieces are irradiated by sunlight, part of the sunlight can form light leakage through the gaps, so that the part of the solar energy cannot be absorbed by the photovoltaic cell pieces and converted into electric energy, the utilization rate of the solar energy is reduced, and the photovoltaic cell pieces are another type of waste.
Disclosure of Invention
In order to solve the technical problems, the invention provides a photovoltaic module for realizing the light transmission and collection of the gaps of photovoltaic cells, which comprises an EVA (ethylene vinyl acetate) adhesive film, a plurality of photovoltaic cells and a back plate, wherein the back plate comprises a plurality of areas adaptive to the photovoltaic cells, the adjacent boundary positions of the areas are provided with light-gathering curved surfaces, the photovoltaic cells are connected in series and are respectively arranged in each area of the back plate, and the EVA adhesive film is used for packaging the photovoltaic cells and the back plate into a whole; the light-gathering curved surface can reflect and gather sunlight which penetrates through the EVA adhesive film and irradiates the light-gathering curved surface to the photovoltaic cell piece.
Optionally, the light-gathering curved surface is provided with a reflecting layer, and the reflecting layer adopts low-temperature glaze or modified TiO2A material.
Optionally, the light-gathering curved surface is a single curved surface, and a light-gathering focus of the light-gathering curved surface is located on the photovoltaic cell piece on one side of the gap.
Optionally, the light-gathering curved surfaces are hyperboloids, and light-gathering focuses of the two curved surfaces are respectively located on the photovoltaic cell pieces on two sides of the gap.
Optionally, the thickness of the photovoltaic cell is larger than the gap width of the adjacent photovoltaic cell.
Optionally, the cross section of the light-gathering curved surface is arc-shaped, and the curvature radius of the light-gathering curved surface is smaller than the thickness of the photovoltaic cell.
Optionally, the method for encapsulating the photovoltaic module by using the EVA adhesive film comprises the following steps:
s100, forming a first EVA (ethylene vinyl acetate) film layer on the upper surface of the back plate provided with the area grids by adopting a deposition process;
s200, mounting the photovoltaic cell pieces on each area of the backboard grid at a preset first process temperature;
s300, connecting all the photovoltaic cells in series;
s400, forming an EVA adhesive film filling layer in the gap between adjacent photovoltaic cell pieces by adopting a growth process at a preset second process temperature, and performing chemical mechanical polishing treatment;
s500, forming a second EVA film layer on the upper surface of the photovoltaic cell piece by adopting a deposition process again.
Optionally, the deposition process includes the following steps:
preprocessing a backboard provided with area grids, wherein the preprocessing comprises cleaning;
loading the pretreated back plate into an inner cavity of a process furnace, and carrying out process debugging;
vacuumizing the inner cavity of the process furnace, and heating after vacuumizing is finished;
carrying out ion bombardment treatment on the back plate;
heating and pre-melting the EVA adhesive;
heating the EVA adhesive again to evaporate the EVA adhesive, and depositing the evaporated EVA adhesive on the upper surface of the back plate within a first preset time to form an EVA adhesive deposition layer;
the temperature of the inner cavity of the process furnace is reduced, so that the EVA adhesive deposition layer is formed into the EVA adhesive film layer.
Optionally, the growth process includes the following steps:
heating to a second process temperature, and melting the EVA glue;
keeping the second process temperature, and slowly injecting the molten EVA glue into the gap between the adjacent photovoltaic cell pieces;
after the gap is filled, standing for a second preset time to enable the first EVA adhesive film layer to be fully combined with the injected molten EVA adhesive, and enabling no gap to be left in the gap between the adjacent photovoltaic cell pieces;
and cooling to enable the EVA adhesive to be molded, namely forming an EVA adhesive film filling layer in the gap between the adjacent photovoltaic cell pieces.
Optionally, when the photovoltaic module is packaged, error compensation is implemented for controlling the process temperature in the packaging process, and the error compensation mode is as follows:
measuring the ambient temperature and humidity in real time;
inputting the environmental temperature and humidity into a pre-constructed system error evaluation model for training;
obtaining a system error coefficient under the current condition through training;
and correcting the set process temperature according to the system error coefficient, and controlling the temperature in the packaging process by using the corrected process temperature.
According to the photovoltaic module for realizing the light transmission and collection of the photovoltaic cell piece gaps, the light-gathering curved surfaces are arranged at the boundary gaps of the photovoltaic cell pieces of the back plate, the light-gathering curved surfaces reflect and gather sunlight, the sunlight at the positions is reflected to the photovoltaic cell pieces to be utilized, and the microstructure of the light-gathering curved surfaces is manufactured, so that a certain focusing effect is formed during reflection, the reflected sunlight is gathered, and the solar energy utilization rate is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of a photovoltaic module for realizing light transmission and collection of gaps between photovoltaic cells according to an embodiment of the present invention;
FIG. 2 is a schematic view of a single curved surface adopted by a light-gathering curved surface of an embodiment of a photovoltaic module for realizing the light-transmitting collection of the gaps between photovoltaic cells according to the present invention;
FIG. 3 is a schematic view of a hyperboloid adopted by a light-gathering curved surface of an embodiment of a photovoltaic module for realizing light transmission and collection of gaps of photovoltaic cells according to the invention;
fig. 4 is a flowchart of a method for packaging an EVA film used in an embodiment of a photovoltaic module for realizing light transmission and collection of gaps between photovoltaic cells according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
As shown in fig. 1, an embodiment of the present invention provides a photovoltaic module for realizing light transmission and collection of gaps between photovoltaic cells, including an EVA film 1, a plurality of photovoltaic cells 2, and a back plate 3, where the back plate 3 includes a plurality of regions 4 adapted to the photovoltaic cells 2, a light-gathering curved surface 5 is disposed at a position of an adjacent boundary of the regions 4, the photovoltaic cells 2 are connected in series and are arranged and combined in a grid manner and installed in each region 4 of the back plate 3, respectively, and the EVA film 1 is used for packaging the plurality of photovoltaic cells 2 and the back plate 3 into a whole; the light-gathering curved surface 5 can reflect and gather sunlight which penetrates through the EVA adhesive film 1 and irradiates the light-gathering curved surface 5 to the photovoltaic cell piece 2.
The working principle and the beneficial effects of the technical scheme are as follows: in the scheme, the adjacent boundary positions of the areas correspond to the boundary gaps of the photovoltaic cells, the light-gathering curved surfaces are arranged in the boundary gaps of the photovoltaic cells on the back plate, sunlight at the positions is reflected to the photovoltaic cells to be utilized by the light-gathering curved surfaces to reflect and gather the sunlight, and the light-gathering curved surfaces are made into microstructures of the light-gathering curved surfaces, so that certain focusing effect is formed while reflection is carried out, the reflected sunlight is gathered, and the solar energy utilization rate is improved; among them, eva (polyethylene vinyl acetate) is a short for polyethylene-polyvinyl acetate copolymer, and has low melting point, easy flow, high transparency (light transmittance greater than 90%), high adhesion and good durability, can resist high temperature, moisture, ultraviolet rays, etc., and is suitable for use as a packaging film of a photovoltaic module; the photovoltaic cell pieces can be arranged and combined in a grid mode by adopting the mode that the upper surfaces of the photovoltaic cell pieces are flush and are respectively installed.
In one embodiment, as shown in fig. 2 and 3, the light-gathering curved surface 5 is provided with a reflective layer, and the reflective layer may be low-temperature glaze or modified TiO2A material; the light-gathering curved surface 5 can be a single curved surface or a double curved surface: when the solar cell is a single-curved surface, the light-gathering focus of the single-curved surface is positioned on the photovoltaic cell 2 on one side of the gap; when the solar cell is a hyperbolic surface, the light-gathering focuses of the two curved surfaces are respectively positioned on the photovoltaic cell pieces 2 at the two sides of the gap.
The working principle and the beneficial effects of the technical scheme are as follows: according to the scheme, the reflecting layer is arranged on the light-gathering curved surface and can be low-temperature glaze or modified TiO2The material can further enhance the reflection and convergence effect of the light-gathering curved surface on sunlight and reduce the energy loss of solar energy in the light transmission process; the light-gathering curved surface is made into a single curved surface, so that sunlight can be reflected and gathered on the photovoltaic cell piece on the opposite side of the curved surface; if the light-gathering curved surface is made into a hyperboloid, the hyperboloids are symmetrically arranged in the vertical direction, any one of the hyperboloids is provided with a photovoltaic cell sheet opposite to the other, namely the photovoltaic cell sheets on two sides of the gap, and each curve can reflect and gather sunlight to the photovoltaic cell sheet on the opposite side of the curve; and the received photovoltaic cell is used for energy conversion, so that the high-efficiency collection and utilization of solar energy are realized.
In one embodiment, the thickness of the photovoltaic cell sheet 2 is greater than the gap width of the adjacent photovoltaic cell sheets; the section of the light-gathering curved surface is arc-shaped, and the curvature radius of the light-gathering curved surface is smaller than the thickness of the photovoltaic cell 2.
The working principle and the beneficial effects of the technical scheme are as follows: according to the scheme, the relation between the thickness of the photovoltaic cell and the width of the gap between the adjacent photovoltaic cells is limited, so that on one hand, the condensing curved surface can be ensured to reflect and gather sunlight onto the adjacent photovoltaic cells for utilization, and on the other hand, the photovoltaic module can be more compact in structure; if the section of the adopted light-gathering curved surface is arc-shaped, the relation between the curvature radius of the light-gathering curved surface and the thickness of the photovoltaic cell piece is limited, so that the light-gathering curved surface can be ensured to easily reflect and gather sunlight onto the adjacent photovoltaic cell piece for utilization, and the reflection deviation is reduced.
In one embodiment, as shown in fig. 4, the method for encapsulating the photovoltaic module by using the EVA adhesive film 1 is as follows:
s100, forming a first EVA (ethylene vinyl acetate) film layer on the upper surface of the back plate provided with the area grids by adopting a deposition process;
s200, mounting the photovoltaic cell pieces on each area of the backboard grid at a preset first process temperature;
s300, connecting all the photovoltaic cells in series;
s400, forming an EVA adhesive film filling layer in the gap between adjacent photovoltaic cell pieces by adopting a growth process at a preset second process temperature, and performing chemical mechanical polishing treatment;
s500, forming a second EVA film layer on the upper surface of the photovoltaic cell piece by adopting a deposition process again.
The working principle and the beneficial effects of the technical scheme are as follows: according to the scheme, for the photovoltaic module packaging, an EVA adhesive film is adopted for packaging; during packaging, the first EVA adhesive film layer is formed by a deposition process, so that the uniformity and the flatness of the first EVA adhesive film layer can be guaranteed, and the mounting quality of the photovoltaic cell piece can be guaranteed; the reliability and firmness of the mounting of the photovoltaic cell are guaranteed by controlling the first process temperature; the growth molding quality of the EVA adhesive film filling layer can be guaranteed by controlling the temperature of the second process, and the phenomenon that a small cavity which is not filled in a real manner is formed inside the EVA adhesive film filling layer to influence the normal transmission of sunlight is avoided; the upper surface of the EVA adhesive film filling layer can be flush with the upper surface of the photovoltaic cell piece through chemical mechanical polishing treatment, and the EVA adhesive film filling layer has both aesthetic property and guarantee performance; the second EVA adhesive film layer also adopts a deposition process to ensure the uniformity and the flatness of the second EVA adhesive film layer and improve the surface quality of the photovoltaic module; the set values of the first process temperature and the second process temperature are determined according to the physical properties of the adopted EVA adhesive.
In one embodiment, the deposition process proceeds as follows:
pretreating the backboard provided with the area grids, wherein the pretreatment comprises cleaning treatment;
loading the pretreated back plate into an inner cavity of a process furnace, and carrying out process debugging;
vacuumizing the inner cavity of the process furnace, and heating after vacuumizing is finished;
carrying out ion bombardment treatment on the back plate;
heating and pre-melting the EVA adhesive;
heating the EVA adhesive again to evaporate the EVA adhesive, and depositing the evaporated EVA adhesive on the upper surface of the back plate within a first preset time to form an EVA adhesive deposition layer;
the temperature of the inner cavity of the process furnace is reduced, so that the EVA adhesive deposition layer is formed into the EVA adhesive film layer.
The working principle and the beneficial effects of the technical scheme are as follows: the scheme embodies the deposition process adopted in the photovoltaic module packaging, and the adopted deposition process is selected to carry out the surface cleaning and other treatments of the back plate through pretreatment, so that the influence of foreign matter pollution on the process quality is avoided, and the adhesion between the surface of the back plate and the EVA adhesive is enhanced; the deposition process is carried out in a vacuum state, so that adverse effects caused by substances in the air can be prevented; the adhesion between the surface of the back plate and the EVA adhesive can be further enhanced by carrying out ion bombardment treatment on the back plate; then, the EVA adhesive is heated in a segmented manner, and is pre-melted and then evaporated, so that the evaporation rate level can be improved, the utilization rate of the EVA adhesive material is improved, and the cost is saved; the evaporated EVA adhesive is deposited to form an EVA adhesive deposition layer, so that the uniformity and the flatness of the EVA adhesive deposition layer can be guaranteed.
In one embodiment, the growth process proceeds as follows:
heating to a second process temperature, and melting the EVA glue;
keeping the second process temperature, and slowly injecting the molten EVA glue into the gap between the adjacent photovoltaic cell pieces;
after the gap is filled, standing for a second preset time to enable the first EVA adhesive film layer to be fully combined with the injected molten EVA adhesive, and enabling no gap to be left in the gap between the adjacent photovoltaic cell pieces;
and cooling to enable the EVA adhesive to be molded, namely forming an EVA adhesive film filling layer in the gap between the adjacent photovoltaic cell pieces.
The working principle and the beneficial effects of the technical scheme are as follows: the growth technology that this scheme adopted in to the photovoltaic module encapsulation has carried out concretization and has selected, and the growth technology goes on under second technology temperature state, is filled the back in the clearance, carries out the second and predetermines standing of time for EVA is glued and is fully combined with first EVA glued membrane layer, can ensure EVA glued membrane filling layer growth shaping quality, avoids inside to form and fills the not real little cavity, influences the normal transmission to the sunlight.
In one embodiment, during photovoltaic module packaging, error compensation is performed for control of process temperature during packaging in the following manner:
measuring the ambient temperature and humidity in real time;
inputting the environmental temperature and humidity into a pre-constructed system error evaluation model for training;
obtaining a system error coefficient under the current condition through training;
and correcting the set process temperature according to the system error coefficient, and controlling the temperature in the packaging process by using the corrected process temperature.
The working principle and the beneficial effects of the technical scheme are as follows: according to the scheme, when the photovoltaic module is packaged, error compensation is implemented on the control of the process temperature in the packaging process, so that the system error generated by a control system under the influence of the difference of the ambient temperature and the humidity is made up, the control precision of the process temperature is improved, the process quality and the product quality are guaranteed, the quality difference caused under the conditions of different ambient temperatures and different humidities is avoided, and the consistency and the yield of the product quality are improved; the process temperature in the packaging process comprises a first process temperature and a second process temperature.
In one embodiment, the systematic error assessment model includes a Convolutional Neural Network (CNN) optimized by training with a known data set, the Convolutional Neural Network (CNN) being trained using the following loss function:
in the above formula, N represents the data number of the data set; n represents the total number of nodes of the neural network; w denotes a mask matrix of the data set, WijData corresponding to the ith row and the jth column in a mask matrix representing the data set; p represents a scoring matrix for each point of the process control system, PijRepresenting the score value corresponding to the ith row and the jth column in the score matrix; f represents a weight matrix for each point of the process control system, FijRepresenting the weight value corresponding to the ith row and the jth column in the weight matrix; KL represents the Kullback-Leibler divergence; q (H)k||X,Ak) A single temperature parameter or a learned hidden representation of a single humidity parameter profile k representing an ambient temperature and humidity profile image; m (H) represents a standard Gaussian distribution prior.
The working principle and the beneficial effects of the technical scheme are as follows: according to the scheme, a known data set is used as a data sample for training a system error evaluation model, so that the trained convolutional neural network is more suitable for being used for evaluating a system error coefficient under a process environment in the packaging process, and the convolutional neural network is adapted to the real scene of the process environment in the packaging process; and then the trained convolutional neural network is used for processing the subsequently received environmental temperature and humidity data, so that the high efficiency and reliability of the data processing module for processing the environmental temperature and humidity data can be improved, and the evaluation accuracy of the system error coefficient is improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A photovoltaic module for realizing light transmission collection of gaps among photovoltaic cells is characterized by comprising an EVA (ethylene vinyl acetate) adhesive film, a plurality of photovoltaic cells and a back plate, wherein the back plate comprises a plurality of areas adaptive to the photovoltaic cells; the light-gathering curved surface can reflect and gather sunlight which penetrates through the EVA adhesive film and irradiates the light-gathering curved surface to the photovoltaic cell piece.
2. The photovoltaic module for realizing the light transmission and collection of the gaps between the photovoltaic cells as claimed in claim 1, wherein the light-gathering curved surface is provided with a reflecting layer, and the reflecting layer is made of low-temperature glaze or modified TiO2A material.
3. The photovoltaic module for realizing the light transmission and collection of the gap between the photovoltaic cells according to claim 1, wherein the light-gathering curved surface is a single curved surface, and the light-gathering focus of the light-gathering curved surface is located on the photovoltaic cell at one side of the gap.
4. The photovoltaic module for realizing the light transmission and collection of the gaps of the photovoltaic cells as claimed in claim 1, wherein the light-gathering curved surfaces are hyperboloids, and the light-gathering focuses of the two curved surfaces are respectively located on the photovoltaic cells at two sides of the gap.
5. The photovoltaic module for realizing the light transmission collection of the gaps of the photovoltaic cell sheets according to claim 1, wherein the thickness of the photovoltaic cell sheet is larger than the width of the gaps of the adjacent photovoltaic cell sheets.
6. The photovoltaic module for realizing the light transmission and collection of the gaps of the photovoltaic cells as claimed in claim 1, wherein the cross section of the light-gathering curved surface is arc-shaped, and the curvature radius of the light-gathering curved surface is smaller than the thickness of the photovoltaic cells.
7. The photovoltaic module for realizing the light transmission and collection of the gaps between the photovoltaic cells as claimed in claim 1, wherein the method for encapsulating the photovoltaic module by using the EVA adhesive film comprises the following steps:
s100, forming a first EVA (ethylene vinyl acetate) film layer on the upper surface of the back plate provided with the area grids by adopting a deposition process;
s200, mounting the photovoltaic cell pieces on each area of the backboard grid at a preset first process temperature;
s300, connecting all the photovoltaic cells in series;
s400, forming an EVA adhesive film filling layer in the gap between adjacent photovoltaic cell pieces by adopting a growth process at a preset second process temperature, and performing chemical mechanical polishing treatment;
s500, forming a second EVA film layer on the upper surface of the photovoltaic cell piece by adopting the deposition process again.
8. The photovoltaic module for realizing the light transmission and collection of the photovoltaic cell gap according to claim 7, wherein the deposition process comprises the following steps:
preprocessing a backboard provided with area grids, wherein the preprocessing comprises cleaning;
loading the pretreated back plate into an inner cavity of a process furnace, and carrying out process debugging;
vacuumizing the inner cavity of the process furnace, and heating after vacuumizing is finished;
carrying out ion bombardment treatment on the back plate;
heating and pre-melting the EVA adhesive;
heating the EVA adhesive again to evaporate the EVA adhesive, and depositing the evaporated EVA adhesive on the upper surface of the back plate within a first preset time to form an EVA adhesive deposition layer;
the temperature of the inner cavity of the process furnace is reduced, so that the EVA adhesive deposition layer is formed into the EVA adhesive film layer.
9. The photovoltaic module for realizing the light transmission and collection of the gaps between the photovoltaic cells according to claim 7, wherein the growth process comprises the following steps:
heating to a second process temperature, and melting the EVA glue;
keeping the second process temperature, and slowly injecting the molten EVA glue into the gap between the adjacent photovoltaic cell pieces;
after the gap is filled, standing for a second preset time to enable the first EVA adhesive film layer to be fully combined with the injected molten EVA adhesive, and enabling no gap to be left in the gap between the adjacent photovoltaic cell pieces;
and cooling to enable the EVA adhesive to be molded, namely forming an EVA adhesive film filling layer in the gap between the adjacent photovoltaic cell pieces.
10. The photovoltaic module for realizing the transmission collection of the gaps of the photovoltaic cells according to any one of the claims 1 to 9, wherein during the encapsulation of the photovoltaic module, the error compensation is implemented for the control of the process temperature during the encapsulation process in the following manner:
measuring the ambient temperature and humidity in real time;
inputting the environmental temperature and humidity into a pre-constructed system error evaluation model for training;
obtaining a system error coefficient under the current condition through training;
and correcting the set process temperature according to the system error coefficient, and controlling the temperature in the packaging process by using the corrected process temperature.
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| CN104300023A (en) * | 2014-09-24 | 2015-01-21 | 苏州盛康光伏科技有限公司 | Solar photovoltaic module |
| CN104332521A (en) * | 2014-11-28 | 2015-02-04 | 浙江晶科能源有限公司 | Photovoltaic module and production method thereof |
| US20160268466A1 (en) * | 2015-03-13 | 2016-09-15 | Panasonic Intellectual Property Management Co., Ltd. | Solar cell module |
| JP2016171299A (en) * | 2015-03-13 | 2016-09-23 | パナソニックＩｐマネジメント株式会社 | Solar battery module |
| CN113611763A (en) * | 2021-08-02 | 2021-11-05 | 上海晶澳太阳能科技有限公司 | Photovoltaic module and preparation method thereof |
| CN114156359A (en) * | 2020-09-08 | 2022-03-08 | 广东尚瑞新材料有限公司 | Be applied to photovoltaic cell module's clearance membrane and photovoltaic cell module |
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Patent Citations (6)
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| CN104300023A (en) * | 2014-09-24 | 2015-01-21 | 苏州盛康光伏科技有限公司 | Solar photovoltaic module |
| CN104332521A (en) * | 2014-11-28 | 2015-02-04 | 浙江晶科能源有限公司 | Photovoltaic module and production method thereof |
| US20160268466A1 (en) * | 2015-03-13 | 2016-09-15 | Panasonic Intellectual Property Management Co., Ltd. | Solar cell module |
| JP2016171299A (en) * | 2015-03-13 | 2016-09-23 | パナソニックＩｐマネジメント株式会社 | Solar battery module |
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