CN117594507A - Method for shortening lamination time of photovoltaic module, circulating belt and laminating machine used by method - Google Patents
Method for shortening lamination time of photovoltaic module, circulating belt and laminating machine used by method Download PDFInfo
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- CN117594507A CN117594507A CN202311608346.5A CN202311608346A CN117594507A CN 117594507 A CN117594507 A CN 117594507A CN 202311608346 A CN202311608346 A CN 202311608346A CN 117594507 A CN117594507 A CN 117594507A
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- 238000010030 laminating Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000004904 shortening Methods 0.000 title claims abstract description 11
- 238000003475 lamination Methods 0.000 title claims description 31
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims description 37
- 230000008719 thickening Effects 0.000 claims description 34
- 239000000853 adhesive Substances 0.000 claims description 19
- 230000001070 adhesive effect Effects 0.000 claims description 19
- 230000008018 melting Effects 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 5
- 239000002313 adhesive film Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000009958 sewing Methods 0.000 description 3
- 238000012858 packaging process Methods 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67739—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations into and out of processing chamber
- H01L21/6776—Continuous loading and unloading into and out of a processing chamber, e.g. transporting belts within processing chambers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67121—Apparatus for making assemblies not otherwise provided for, e.g. package constructions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67739—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations into and out of processing chamber
- H01L21/67742—Mechanical parts of transfer devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Electromagnetism (AREA)
- Robotics (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention provides a method for shortening the laminating time of a photovoltaic module, a laminating machine and a circulating belt, wherein the circulating belt is provided with a thickened part for supporting and carrying the photovoltaic module, the laminating machine comprises a lower circulating belt, a laminating workbench, an upper cover and a lower box, a sealing strip is arranged at the lower end of the upper cover, and the lower circulating belt runs along the laminating workbench.
Description
Technical Field
The invention relates to a method for shortening the time of laminating a photovoltaic module, a circulating belt and a laminating machine used by the method.
Background
In the lamination production link of the photovoltaic module, the structure, the performance and the lamination process of the laminating machine determine the production efficiency of the photovoltaic module.
The encapsulation of the photovoltaic module is carried out in a sealed vacuum cavity with a certain temperature, and the adhesive is melted and then laminated and solidified in a vacuum environment, so that glass, welded battery pieces and a back plate (or glass) are bonded into a whole, and the whole lamination process time is mainly determined by the melting lamination and solidification time of the adhesive; when the quality of the packaged photovoltaic module is inspected, an important index is that bubbles cannot exist in the packaged module, and the strength of the integrated module is controlled by the crosslinking degree index after the curing of the adhesive; to ensure that no bubbles exist in the packaged assembly, after the assembly enters the cavity, high vacuum must be formed in the cavity before the adhesive (mainly EVA and POE) in the assembly melts, and the vacuum degree is required to be lower than 100 Pa within 60 seconds; in the prior art, the temperature of a heating plate is limited, the heating speed of the adhesive at two stages is controlled in the process of conveying the photovoltaic module above the heating plate and before the cavity is covered by the upper box and the lower box to reach high vacuum, so that the adhesive is not melted before the module to be packaged forms high vacuum in the cavity, and the temperature in the cavity cannot exceed an upper limit before the vacuum in the cavity reaches a specified requirement, otherwise, after the photovoltaic module enters the upper part of the heating plate, the photovoltaic module starts to absorb heat and heat, so that the adhesive of the photovoltaic module is melted in advance, and bubbles are easily generated in the photovoltaic module; therefore, after the vacuum degree in the cavity reaches the prescribed requirement, the heating rate of the cavity is limited, which makes it necessary for the adhesive to melt and cure for a long time, and the time of the entire lamination process is prolonged. In addition, as shown in fig. 1 and 2, the lower circulating belt for conveying the photovoltaic module and the upper circulating belt for conveying the photovoltaic module of the existing laminating machine need to cross the sealing strip of the cavity in the conveying direction, the thickness of the circulating belt has great influence on the vacuum degree of the cavity, and if the thickness of the circulating belt exceeds a certain range, the cavity is poorly sealed, so that the thickness of the circulating belt is limited, and the thicknesses of the upper circulating belt and the lower circulating belt are generally controlled within 0.5 millimeter; in addition, since the upper circulation belt is thin and is easy to generate wrinkles in the lamination process, in the prior art, the thickness of the upper circulation belt is generally increased as much as possible to prevent the upper circulation belt from generating wrinkles in the lamination process, under the same process temperature condition, the thinner the lower circulation belt is, the faster the photovoltaic module on the lower circulation belt absorbs heat in the transmission process and initially enters the cavity, the faster the binder melts, and the thickness of the lower circulation belt cannot be effectively increased, so that the quality of the photovoltaic module can be ensured, only the upper limit of the lamination process temperature can be limited, and therefore, the upper limit of the lamination process temperature is limited, the time of the whole lamination packaging process is prolonged, the total duration used in the whole packaging process is limited, and the production capacity per unit cavity area is limited. For this reason, industry has been structurally improved in order to increase laminator productivity. In terms of structure, the method for solving the problem is to increase the cavity area of the traditional laminating machine, so that more photovoltaic modules can be accommodated in the cavity, the productivity of the laminating machine is improved, and the novel multi-layer laminating machine is developed, and more than two lamination hosts arranged in three-dimensional directions work together at a time, so that the productivity of the laminating machine is improved. Both of the above methods use an increased number of components to be laminated at a time to increase the throughput of the laminator, however, the laminator cannot be increased in length and height without limitation due to process limitations. Thus, it is imperative to make comprehensive improvements to laminators and lamination processes.
Disclosure of Invention
Aiming at the technical problems that the laminating process temperature of the laminating machine is limited due to the limitation of the melting time point of the adhesive in the prior art, the packaging time of the whole photovoltaic module is prolonged, and the yield per unit cavity area is low, the invention provides a method for shortening the laminating time of the photovoltaic module, and the laminating machine and a circulating belt used by the method.
The technical aim of the invention is realized by the following technical scheme:
the circulating belt for the photovoltaic module laminating machine is provided with a thickened part, the thickened part is used for supporting and carrying the photovoltaic module, and the thickness of the thickened part of the circulating belt is larger than that of the circulating belt which can enable a cavity of the photovoltaic module laminating machine to be well sealed;
the thickened parts are continuous and are used for supporting all carried photovoltaic modules; or the thickened parts are discontinuous, and the size of the discontinuous thick parts is matched with the size of the carried single or multiple photovoltaic modules so as to support the carried photovoltaic modules;
the thickened part is a thickening layer; the thickening part is positioned below the circulating belt and fixedly connected with the circulating belt, or the thickening part is positioned above the circulating belt and fixedly connected with the circulating belt; the thickening layer is a piece of circulating cloth with the same quality as the circulating belt, and the total thickness of the thickening part of the circulating belt is 0.8-1.2 mm or 0.7-2 mm;
the thickened part is a thick circulating belt to form a thickened circulating belt, two sides of the length direction of the thick circulating belt are respectively provided with a thin circulating belt to form a reference circulating belt, the thickened circulating belt is sewn or bonded and fixedly connected with the end part of the reference circulating belt, and the total thickness of the thickened part of the circulating belt is 0.8-1.2 mm or 0.7-2 mm;
the thickening layer is a circulating cloth with the same material as the circulating belt.
The utility model provides a photovoltaic module laminator, includes down circulation area, lamination workstation, upper cover and lower case, and the upper cover lower extreme sets up the sealing strip, and lower circulation area is along lamination workstation operation, and upper cover and lower case constitute the cavity and lower circulation area is located between upper cover and lower case on length direction when upper cover and lower case are closed, and the sealing strip presses in lower circulation area top and sealed cavity, lower circulation area adopt foretell circulation area structure, the thickening position of lower circulation area is located the sealing area of the cavity that the sealing strip formed.
The laminating method of the photovoltaic module comprises the steps of transmitting the photovoltaic module to a laminating workbench, vacuumizing the cavity after the cavity is closed to reach the process vacuum degree, melting, laminating and solidifying the adhesive after vacuumizing the cavity after the cavity is closed to reach the process vacuum degree, and reducing the heat transfer rate of a heating plate to the photovoltaic module after the stage of transmitting the photovoltaic module to the laminating workbench and the stage of reaching the process vacuum degree after the cavity is closed, so that the adhesive reaches the critical melting state when the cavity reaches the process vacuum degree; and/or the adhesive is an adhesive film;
reducing the heat transfer rate of the heater plate to the photovoltaic module by increasing the thickness of the lower endless belt in contact with the photovoltaic module;
the heat transfer rate of the heating plate to the photovoltaic module is reduced by fixedly arranging a thickening layer on the upper surface of the heating plate and/or the lamination workbench;
the thickness of the thickened part of the lower circulation belt is controlled to be 0.8-1.2 mm or 0.7-2 mm, and the thickness of the part of the lower circulation belt contacted with the sealing strip is controlled to be 0.2-0.5 mm.
According to the method and the laminating machine, the thickening layer is added between the photovoltaic module and the heating plate to increase the heat transfer resistance of the photovoltaic module at the stage of transmission on the laminating workbench and the stage before the cavity is formed into high vacuum after entering the cavity, and the adhesive can not be melted in the process under the condition of increasing the process temperature, so that the aim of shortening the whole packaging time of the module by increasing the process temperature under the condition of ensuring the quality of the module is fulfilled, and the yield per unit cavity area is improved.
The circulating belt for the laminating machine with the structure is provided with the thickened part for supporting and carrying the battery component, so that the thickness of the part of the circulating belt for supporting the battery component can be increased under the condition that the thickness of the part of the circulating belt, which is in contact with the sealing strip, is not changed, so that the heat transfer rate of the circulating belt is reduced, and the adhesive can not be melted before the cavity reaches the specified vacuum degree under the condition that the process temperature is increased.
Description of the reference numerals
1-a heating plate; 2-loading the box; 3, sealing strips; 4-up-circulating belt; 5-a lower endless belt; 510—a reference endless belt; 520-thickening the endless belt; 530-thickening layer; 6-assembly.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a prior art laminator circulation belt;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic view of an embodiment of an endless belt for a laminator in accordance with the invention;
FIG. 4 is a schematic top view of FIG. 3;
FIG. 5 is a schematic view of the structure of another embodiment of the endless belt of the present invention:
FIG. 6 is a schematic top view of FIG. 5;
FIG. 7 is a schematic view of the structure of a further embodiment of the endless belt of the present invention;
FIG. 8 is a schematic top view of FIG. 7;
FIG. 9 is a schematic structural view of an embodiment of a endless belt with discrete distribution of thickening layers;
fig. 10 is a schematic top view of fig. 9.
Detailed Description
Description: "inner-" as used herein refers to the interior of a cavity; "external" -means outside the cavity.
The method for shortening the lamination time of the photovoltaic module comprises the following steps: and reducing the heat transfer rate of the photovoltaic module at the stage of transmitting the photovoltaic module to the laminating workbench of the laminating machine and the stage before the cavity is closed to reach the process set vacuum degree, so as to improve the laminating process temperature of the laminating machine, and enabling the photovoltaic module to reach the critical melting state when the vacuum degree of the cavity reaches the set process vacuum degree.
For example, when the photovoltaic module is transmitted to the heating plate of the laminating machine, a thickening layer is arranged between the heating plate and the photovoltaic module to reduce the heat transfer rate of the heating plate to the photovoltaic module, so that the laminating and curing process temperature of the photovoltaic module can be improved, and the total laminating duration of the photovoltaic module is shortened. Specifically, the thickness of the part of the lower circulation belt corresponding to the bearing photovoltaic module can be increased to be larger than the thickness of the circulation belt acceptable by the sealing cavity, so that the thickness of the part is larger than the thickness of the circulation belt capable of sealing the cavity well, or a thickening layer is attached above the heating plate to increase the distance between the heating plate and the photovoltaic module, and/or a thickening layer is attached on the surface of the laminating workbench to increase the distance between the heating plate and the photovoltaic module. The connection structure of the thickening layer and the endless belt or the heating plate or the lamination table may be bonded, riveted, screwed, etc., but is not limited thereto.
By adopting the method, as the photovoltaic module enters the stage of the transmission process of the laminating machine and before the cavity is closed to form high vacuum, the heat transfer mode of the heating plate to the module comprises three modes, wherein the first mode is heat conduction through the circulating belt, the second mode is convection heat conduction through air in the cavity, and the third mode is heat radiation of the heating plate; the phase after the high vacuum is formed in the cavity is also the phase that the binder melts, because the cavity is in a vacuum state at the phase, the convection heat transfer is negligible, therefore, the heat transfer mode of the heating plate to the component is mainly heat radiation and heat transfer through the lower circulating belt, and at the phase, the bottom of the photovoltaic component is contacted with the heating plate, glass deforms, so that the contact between the photovoltaic component and the heating plate is changed from full contact to partial contact, the contact surface is reduced, the heat transfer rate through the heat transfer mode is greatly reduced, and the heat transfer mode at the moment is mainly heat radiation. Therefore, when the thickness of the local lower circulation belt between the photovoltaic module and the heating plate is increased, the heat transfer resistance of the photovoltaic module in the transmission process of entering the cavity and before the photovoltaic module enters the cavity to start to form a high vacuum stage is increased, the heat transfer rate of the stage is reduced, and meanwhile, the heat transfer rate of the photovoltaic module after the cavity forms the high vacuum stage is not obviously influenced, so that the process temperature of the photovoltaic module can be increased, the temperature difference is increased, the heat transfer rate is increased, the whole packaging time of the module is shortened, and the purpose of improving the capacity of the unit cavity area is achieved.
In the prior art, in order to ensure good sealing, the thicknesses of the upper circulating belt and the lower circulating belt are generally less than or equal to 0.5 millimeter to 0.25 millimeter, the upper circulating belt is generally 0.25 millimeter or 0.3 millimeter, the thicker the upper circulating belt is, the better the thickness of the upper circulating belt is, but the comprehensive consideration of the sealing performance of the cavity is needed, therefore, the thicknesses of the upper circulating belt and the lower circulating belt are generally less than or equal to 0.5 millimeter, the thickness of the whole circulating belt is consistent, and therefore, when the upper cover and the lower box are combined to form the cavity, the sealing strip can reliably seal the cavity. In the method, the thickness of the lower circulating belt used for supporting the position of the photovoltaic module is at least increased to increase the interval distance between the photovoltaic module and the heating plate, so that the heat transfer rate between the photovoltaic module and the heating plate is reduced, and the adhesive is kept solid and not melted before the module transmission process and the cavity form high vacuum. Or a thickening layer is provided over the heating plate or over the lamination station to increase the thermal resistance between the heating plate and the photovoltaic module.
The invention also provides a circulating belt, which has inconsistent thickness and a thickened part, wherein the thickened part is used for supporting and carrying the photovoltaic module. The circulating belt structure can realize the method for shortening the lamination time of the photovoltaic module. Specifically, the thickness of at least the part of the circulating belt, which is matched with the sealing strip, is larger than the thickness of the part of the circulating belt, which is matched with the sealing strip. The thickness of the circulating belt in the matching position with the sealing strip can be the same as the thickness in the whole area, the thickness of the circulating belt is larger than the thickness of the matching position with the sealing strip, the thickness of the local part contacted with the photovoltaic module is larger than the thickness of the matching position with the sealing strip, the thickness of other parts is the same as the thickness of the matching position with the sealing strip, a plurality of thickened parts are formed in the area in the matching position with the sealing strip, the size and the shape of the thickened parts are matched with the size and the shape of the carried single or a plurality of battery modules, the battery modules can be stably supported, and the structure with inconsistent height is presented in the area. The specific structure for thickening the circulation belt is as follows: as shown in fig. 3-4, one is to adopt two kinds of circulating belts with different thicknesses, the thickness of the circulating belt at the middle part is greater than that of the circulating belts at the two sides to form a thickened circulating belt 520, the thickness of the circulating belts at the two sides is less than or equal to 0.5 mm, so that the cavity can be well sealed to form a reference circulating belt 510, the thickness of the circulating belt at the middle part is 0.7 mm-2 mm, and preferably between 0.8 mm-1.2 mm, the thickened circulating belt and the reference circulating belt of the two kinds of circulating belts are firmly connected together, the connection mode can be bonding, sewing and the like, and the length of the thickened circulating belt is smaller than that of a sealing strip in sealing fit with the thickened circulating belt. The second structure for forming the circulating belt with different thickness is shown in fig. 5-6, a thickening layer is attached on the upper surface of the part of the reference circulating belt, which needs to be added with thickness, so that the total thickness of the reference circulating belt and the thickening layer is 0.7-2 mm, and optimally 0.8-1.2 mm; the reference endless belt and the thickened layer are firmly connected together by bonding and sewing, but the connection mode is not limited to the two modes. The third structure for forming the circulating belt with different thickness is shown in fig. 7-8, a thickening layer is attached to the lower surface of the part of the reference circulating belt, which needs to be added with the thickness, so that the total thickness of the two layers reaches 0.7-2 mm, and the optimal thickness is 0.8-1.2 mm; the two circulating belts are firmly connected together in a bonding and sewing mode, but the connecting mode is not limited to the two circulating belts. The thickening layer is made of high-temperature resistant material, and the surface of the thickening layer is wear-resistant and smooth, for example, a circulating cloth for manufacturing a circulating belt can be adopted.
The invention also provides a laminating machine capable of shortening the laminating time of the photovoltaic module, which comprises a laminating workbench and a lower circulating belt for conveying the photovoltaic module to the upper part of the laminating workbench, wherein a heating plate is arranged below the laminating workbench and is used for heating the photovoltaic module. The vacuum sealing device comprises a sealing strip, and is characterized by further comprising an upper cover, wherein a sealing strip is arranged on the lower end face of the upper cover and is used for sealing the upper cover and the lamination workbench to form a vacuum cavity when the upper cover and the lamination workbench are closed to form the cavity, the lower circulating belt adopts the circulating belt with the structure, and a thickened part arranged on the circulating belt is positioned in the sealing range of the sealing strip. Or a thickening layer is provided over the heating plate or over the lamination station to reduce the heat transfer rate between the assembly and the heating plate. The thickness of the thickened portion of the lower circulation belt is 0.7-2 mm, preferably 0.8-1.2 mm, and when the thickening layer is arranged on the heating plate, the sum of the thicknesses of the thickening layer and the lower circulation belt is 0.7-2 mm, preferably 0.8-1.2 mm. Alternatively, a thickening layer is provided on the upper surface of the heating plate and/or the upper surface of the laminating table so that the sum of the thicknesses of the lower endless belt and the thickening layer is 0.7 to 2.0 mm or less, preferably 0.8 mm to 1.2 mm. The laminating machine with the structure can increase the distance between the heating plate and the photovoltaic module, so that the heat absorption rate of the photovoltaic module is reduced under the non-vacuum condition, and the heat transfer rate of the photovoltaic module is not influenced under the vacuum condition. The method of the invention can be implemented.
The adhesive in the invention is preferably an adhesive film.
The following table 1 is a comparison table of the laminating time of the laminating machine and the method for shortening the laminating time and the time used for laminating the photovoltaic module of the laminating machine in the prior art, and as can be seen from the table, the process temperatures of the laminating stage and the curing stage are both improved by adopting the method of the invention, the laminating curing time is shortened, and the laminating efficiency is improved.
The component is double-sided glass, the binder is EVA, the packaging is completed in two sections, one section is laminated B1, and the other section is solidified B2; the process vacuum was less than 100 Pa in 60 seconds.
Component specification: the specification of the battery piece is 182; the component dimensions are: 1128x2260 mm;
experimental number: 5000 pieces, no bubble is produced in the photovoltaic module through detection, and all the pieces are qualified.
Table 1:
Claims (10)
1. the circulating belt for the photovoltaic module laminating machine is characterized by comprising a thickened part, wherein the thickened part is used for supporting and carrying the photovoltaic module, and the thickness of the thickened part of the circulating belt is larger than that of the circulating belt which can enable a cavity of the photovoltaic module laminating machine to be well sealed.
2. The endless belt for a photovoltaic module laminator of claim 1, wherein the thickened portion is continuous for supporting all of the photovoltaic modules carried; or the thickened portions are discontinuous, and the size of the discontinuous thickened portions is matched with the size of the carried single or multiple photovoltaic modules so as to support the carried photovoltaic modules.
3. The endless belt for a photovoltaic module laminator of claim 1 or 2, wherein the thickened portion is a thickening layer; the thickening part is positioned below the circulating belt and fixedly connected with the circulating belt, or the thickening part is positioned above the circulating belt and fixedly connected with the circulating belt; the thickening layer is a circulation cloth with the same quality as the circulation belt, and the total thickness of the thickening part of the circulation belt is 0.8-1.2 mm or 0.7-2 mm.
4. The circulation belt for a photovoltaic module laminator according to claim 1 or 2, wherein the thickened portion is a thick circulation belt constituting a thickened circulation belt, thin circulation belts constituting a reference circulation belt are respectively provided on both sides in a length direction of the thick circulation belt, the thickened circulation belt is sewn or fixedly bonded to an end portion of the reference circulation belt, and a total thickness of the thickened portion of the circulation belt is 0.8 mm to 1.2 mm, or 0.7 mm to 2 mm.
5. The endless belt for a photovoltaic module laminator of claim 3, wherein the thickening layer is endless cloth of the same material as the endless belt.
6. The utility model provides a photovoltaic module laminator, includes lower circulating belt, lamination workstation, upper cover and lower case, and the upper cover lower extreme sets up the sealing strip, and lower circulating belt moves along lamination workstation, and upper cover and lower case constitute the cavity and lower circulating belt is located between upper cover and lower case in the length direction when upper cover and lower case are closed, and the sealing strip presses in lower circulating belt top and sealed cavity, its characterized in that, lower circulating belt adopt the circulating belt structure of one of claims 1-5 each item, the thickening position of lower circulating belt is located the sealing region of the cavity that the sealing strip formed.
7. The method for shortening the lamination time of the photovoltaic module comprises the steps of transmitting the photovoltaic module to a lamination workbench, vacuumizing the cavity after the cavity is closed to reach the process vacuum degree, and melting, laminating and solidifying the adhesive after vacuumizing the cavity after the cavity is closed to reach the process vacuum degree, and is characterized in that: the heat transfer rate of the heating plate to the photovoltaic module is reduced at the stage of transmitting the photovoltaic module to the laminating workbench and the stage before the process vacuum degree is reached after the cavity is closed, so that the adhesive reaches a critical melting state when the cavity reaches the process vacuum degree; and/or the adhesive is an adhesive film.
8. The method of reducing the lamination time of a photovoltaic module according to claim 7, wherein: the heat transfer rate of the heater plate to the photovoltaic module is reduced by increasing the thickness of the lower endless belt in contact with the photovoltaic module.
9. The method of reducing the lamination time of a photovoltaic module according to claim 7, wherein: the heat transfer rate of the heating plate to the photovoltaic module is reduced by fixedly providing a thickening layer on the upper surface of the heating plate and/or the lamination table.
10. The photovoltaic module laminator of claim 9, wherein: the thickness of the thickened part of the lower circulation belt is controlled to be 0.8-1.2 mm or 0.7-2 mm, and the thickness of the part of the lower circulation belt contacted with the sealing strip is controlled to be 0.2-0.5 mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2023111201075 | 2023-09-01 | ||
| CN202311120107 | 2023-09-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117594507A true CN117594507A (en) | 2024-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311608346.5A Withdrawn CN117594507A (en) | 2023-09-01 | 2023-11-29 | Method for shortening lamination time of photovoltaic module, circulating belt and laminating machine used by method |
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| Country | Link |
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| CN (1) | CN117594507A (en) |
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2023
- 2023-11-29 CN CN202311608346.5A patent/CN117594507A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20240223 |
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| WW01 | Invention patent application withdrawn after publication |