CN114068734A - Manufacturing method of photovoltaic cell assembly - Google Patents
Manufacturing method of photovoltaic cell assembly Download PDFInfo
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- CN114068734A CN114068734A CN202111332920.XA CN202111332920A CN114068734A CN 114068734 A CN114068734 A CN 114068734A CN 202111332920 A CN202111332920 A CN 202111332920A CN 114068734 A CN114068734 A CN 114068734A
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- welding
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- battery piece
- welding strip
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 77
- 238000000034 method Methods 0.000 claims abstract description 18
- 229910000679 solder Inorganic materials 0.000 claims abstract description 16
- 238000010030 laminating Methods 0.000 claims abstract description 11
- 239000002390 adhesive tape Substances 0.000 claims abstract description 9
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 239000002313 adhesive film Substances 0.000 claims description 40
- 239000000853 adhesive Substances 0.000 claims description 16
- 230000001070 adhesive effect Effects 0.000 claims description 16
- 238000004806 packaging method and process Methods 0.000 claims description 12
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 9
- 229910052709 silver Inorganic materials 0.000 abstract description 9
- 239000004332 silver Substances 0.000 abstract description 9
- 238000004021 metal welding Methods 0.000 abstract description 6
- 239000012634 fragment Substances 0.000 abstract description 4
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 238000005336 cracking Methods 0.000 abstract 1
- 239000005022 packaging material Substances 0.000 abstract 1
- 210000004027 cell Anatomy 0.000 description 19
- 229910021419 crystalline silicon Inorganic materials 0.000 description 5
- 238000003475 lamination Methods 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 210000003850 cellular structure Anatomy 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910001174 tin-lead alloy Inorganic materials 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 230000006750 UV protection Effects 0.000 description 1
- NEIHULKJZQTQKJ-UHFFFAOYSA-N [Cu].[Ag] Chemical compound [Cu].[Ag] NEIHULKJZQTQKJ-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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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
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022433—Particular geometry of the grid contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0508—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module the interconnection means having a particular shape
-
- 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
- H01L31/1876—Particular processes or apparatus for batch treatment of the devices
- H01L31/188—Apparatus specially adapted for automatic interconnection of solar cells in a module
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention relates to a manufacturing method of a solar cell module, which comprises the following steps: the batteries are connected together through a conductive low-temperature metal welding strip, and a low-temperature melting component is arranged on the surface of the metal welding strip. The solder strip on the surface of the battery is provided with a high-light-transmission non-conductive positioning adhesive tape. A plurality of metal welding strips are arranged on the surface of the battery, the welding strips are parallelly placed on the surface of the battery piece at intervals, and after a plurality of battery welding strips are bonded and interconnected into a string, the battery welding strips enter a laminating machine after being typeset and formed according to various component circuits; the thin grid lines on the surface of the battery and the welding strips are fused to form alloy in the laminating process. According to the invention, the use amount of silver paste of the cell can be reduced, and due to the removal of the infrared welding process of the conventional photovoltaic cell, the hidden cracking and the fragment caused by high-temperature welding are avoided, the cell flaking is realized, and the comprehensive cost of the assembly is greatly reduced. The adhesive tape can prevent molten packaging materials (EVA, POE and the like) from entering the lower part of the welding strip in the laminating process, so that the conductivity of the thin grid line and the welding strip is influenced, the cost is lower, and the reliability is higher.
Description
Technical Field
The invention relates to a manufacturing scheme of a photovoltaic cell assembly, in particular to a manufacturing method of a photovoltaic cell assembly without a main grid line electrode.
Background
Photovoltaic is an important clean energy source, and is an important energy field and technical direction in the world; the photovoltaic cell assembly is a core component of photovoltaic power generation, and the crystalline silicon cell assembly accounts for more than 95% of the market. The cost of the crystalline silicon chip and the silver paste occupies a great proportion in the crystalline silicon component, and the reduction of the silver paste amount and the silicon chip amount is very important for reducing the comprehensive cost of the component, the battery power cost and the promotion of the photovoltaic market application.
The thickness of a silicon wafer for a mainstream photovoltaic cell in the market is about 170-180 um, silver (or silver copper) slurry needs to be printed on the surface of the cell in the cell processing process of the crystalline silicon wafer, and after the crystalline silicon wafer is dried or sintered, photo-generated current in the cell is led out through the metal slurry. In a mainstream photovoltaic module, products among batteries are interconnected through a metal welding strip, a tin-lead alloy is arranged on the surface of the welding strip, the welding strip and a battery piece are welded together through a special infrared welding machine at high temperature, the typical welding temperature is 220-350 ℃, and the tin-lead alloy is melted at high temperature to fuse silver slurry on the surfaces of the welding strip and the batteries together. According to the traditional battery pack interconnection scheme, due to the adoption of a high-temperature process, stress warping of a silicon wafer is easy to crack and break, and flaking is difficult to realize; meanwhile, in order to realize effective welding, a large amount of silver needs to be used below the welding strip as a main grid electrode, and the large amount of silver main grids bring high silver paste and battery cost. Meanwhile, the temperature fluctuation of the welding machine can influence the welding tension, and the insufficient tension can influence the reliability; therefore, in the traditional battery assembly manufacturing process, a large amount of welding tension is needed to repair, fragment repair and the like, and the repair rate is about 20%. These reworks all need artifical the completion, bring very big manpower waste and artifical the rework risk of bringing the reliability.
The first type is a laminated assembly, the batteries are not interconnected by adopting welding, the batteries are bonded by conductive paste, and the assembly needs to be overlapped, so that 2-3 batteries are additionally wasted by each assembly, and the cost is increased; the metal main grid and the fine grid still need to be used on the surface of the battery, and the additional high-price conductive paste further increases the cost of the battery. Meanwhile, the hard contact between the battery plates in the laminated assembly easily causes hidden cracks and fragments under the mechanical load pressure; the product has high cost and high reliability risk, so the market share is very low.
The second is smart wire technology, in the technology, the surface of a battery is also free of main grid lines, the batteries are interconnected through a low-temperature welding strip, but an infrared welding process is not performed, wherein the metal welding strip adopts a special packaging adhesive film to fix the welding strip on the adhesive film in advance; and part of the welding strip is embedded into the adhesive film, part of the welding strip is exposed outside, the exposed part of the welding strip is in contact with the battery, and the part of the welding strip exposed out of the adhesive film in the laminating process is fused with the battery to realize interconnection. In the scheme, an expensive special adhesive film is needed to be used for fixing the solder strip, and then in the laminating process, the molten adhesive film easily flows between the solder strip and the battery, so that the battery and the solder strip cannot be in limited contact fusion, the resistance is increased, the power is reduced, and the problem of reliability of hot spots can be caused due to the fact that the contact resistance is large for a long time. The market is largely free of large-scale applications.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the manufacturing method of the photovoltaic cell component is provided, and aims to provide a manufacturing method of a low-cost and high-reliability non-main-grid cell component; the surface of the battery is not provided with main grid lines, only thin grid lines for collecting current are arranged, the batteries are connected through a metal tin-coated welding strip, and the tin-coated welding strip is a low-temperature welding strip; the battery and the welding strip are not welded through traditional infrared high temperature welding, and the cost of the photovoltaic battery assembly is reduced.
In order to solve the technical problems, the technical scheme of the invention is as follows: a manufacturing approach of the photovoltaic battery pack, the photovoltaic battery pack formed by interconnecting a plurality of battery slices, according to the circuit typesetting shaping; each battery piece is provided with a surface and a back, fine grid line electrodes for collecting current are arranged on the surface and the back, and main grid line electrodes are not arranged;
the manufacturing method comprises the following steps: fixing one side of a welding strip on the surface of the battery piece through an adhesive positioning adhesive film, wherein a plurality of welding strips are arranged and arranged on the surface of the battery piece in parallel, and preliminarily pressing the welding strip and the surface of the battery piece; fixing the other side of the welding strip on the back of the adjacent battery piece through a bonding and positioning adhesive film, and preliminarily pressing the welding strip and the back of the battery piece;
connecting a plurality of battery pieces to form a battery piece assembly through the method;
arranging and forming the positioned battery piece assembly according to a circuit, adding a packaging assembly, inputting the packaging assembly into a laminating machine, and laminating the welding strip and the bonding positioning adhesive film to fuse the welding strip and the fine grid line electrode on the surface of the battery piece;
and finally, mounting the junction box and the frame to finish the manufacture of the photovoltaic cell assembly.
Furthermore, the solder strip adopts a low-temperature solder strip which is a tin-coated metal solder strip, and the melting temperature of a tin layer is not higher than 150 ℃, preferably 130-150 ℃.
Furthermore, the adhesive positioning film is provided with a plurality of air holes, so that the adhesive tape is melted and exhausted during lamination, the air holes are micro holes, the size of each micro hole is smaller than 0.1um, air is exhausted, but the melted packaging adhesive film cannot flow into the lower surface of the adhesive tape, and the reliability of the assembly is ensured.
Furthermore, the adhesive positioning adhesive film has high light transmission and UV resistance; the light transmittance reaches more than 90 percent.
Furthermore, on the surface of the battery piece, the bonding positioning adhesive film is positioned above the welding strip; on the back of the battery piece, the bonding positioning adhesive film is positioned below the welding strip; namely, the welding strip is positioned between the bonding positioning adhesive film and the battery piece and is abutted against the battery piece.
Furthermore, the width of the bonding positioning adhesive film is 3-20 mm larger than that of the welding strip, so that the adhesive tape can effectively fix the welding strip.
Furthermore, the bonding positioning adhesive film and the welding strip are distributed in parallel.
Furthermore, the bonding positioning adhesive film is distributed in a sectional manner, and a plurality of sections are distributed on the battery piece.
Furthermore, the adhesive positioning adhesive film and the welding strip are distributed in an intersecting manner, and the intersecting angle is 60-90 degrees.
Compared with the prior art, the manufacturing method of the photovoltaic cell assembly provided by the invention has the advantages that the traditional main grid electrode is abandoned, the welding strip and the thin grid electrode are fused through lamination, the silver paste consumption of the cell piece can be reduced, the infrared welding process of the conventional photovoltaic cell is eliminated, the hidden crack and the fragment caused by high-temperature welding are avoided, the cell flaking is realized, and the comprehensive cost of the assembly is greatly reduced; the welding strip is fixed on the battery piece through the bonding positioning adhesive film, so that the contact between the packaging adhesive film and the welding strip is prevented, the fusion of the welding strip and the battery piece is effectively prevented from permeating the molten packaging adhesive film during lamination, the increase of resistance is reduced, and the cost of the packaging adhesive film is reduced.
Drawings
Fig. 1 shows a top view of the invention.
Fig. 2 shows a front view of the invention.
FIG. 3 shows a top view of a segmented arrangement of the adhesive positioning film of the present invention.
Fig. 4 shows a top view of a vertical arrangement of the adhesive positioning film of the present invention.
Wherein: 1. welding strips, 2, adhering and positioning adhesive films, 3, fine grid line electrodes and 4, battery pieces.
Detailed Description
As shown in the figure, the manufacturing method of the photovoltaic cell module comprises the steps that the photovoltaic cell module formed by connecting a plurality of cell pieces is formed according to circuit typesetting; each battery piece is provided with a surface and a back, fine grid line electrodes for collecting current are arranged on the surface and the back, and main grid line electrodes are not arranged; as shown in the figure, a plurality of thin grid line electrodes are transversely distributed on the surface of the battery piece;
the manufacturing method comprises the following steps: fixing one side of a welding strip on the surface of the battery piece through an adhesive positioning adhesive film, wherein a plurality of welding strips are arranged and arranged on the surface of the battery piece in parallel, and preliminarily pressing the welding strip and the surface of the battery piece; fixing the other side of the welding strip on the back of the adjacent battery piece through a bonding and positioning adhesive film, and preliminarily pressing the welding strip and the back of the battery piece;
connecting a plurality of battery pieces to form a battery piece assembly through the method;
arranging and forming the preliminarily laminated battery piece assembly according to a circuit, adding a packaging assembly, inputting the packaging assembly into a laminating machine, and laminating the welding strip and the bonding positioning adhesive film to fuse the welding strip and the fine grid line electrode on the surface of the battery piece;
and finally, mounting the junction box and the frame to finish the manufacture of the photovoltaic cell assembly.
Furthermore, the welding strip adopts a low-temperature welding strip which is a tin-coated metal welding strip, and the melting temperature of a tin layer is not higher than 150 ℃, preferably 130-150 ℃; the lamination temperature parameters of the photovoltaic module are adapted.
Furthermore, the adhesive positioning film is provided with a plurality of air holes, so that the adhesive tape is melted and exhausted during lamination, the air holes are micro holes, air is exhausted, but the melted packaging adhesive film cannot flow below the adhesive tape, and the reliability of the assembly is ensured.
Furthermore, the bonding positioning adhesive film has high light transmittance and anti-UV characteristics, and the shading rate of the cell is reduced.
Furthermore, on the surface of the battery piece, the bonding positioning adhesive film is positioned above the welding strip; on the back of the battery piece, the bonding positioning adhesive film is positioned below the welding strip; namely, the welding strip is positioned between the bonding positioning adhesive film and the battery piece and is abutted against the battery piece.
Furthermore, the width of the bonding positioning adhesive film is 3-20 mm larger than that of the welding strip, so that the adhesive tape can effectively fix the welding strip.
Furthermore, the bonding positioning adhesive film and the welding strip are distributed in parallel.
Furthermore, the bonding positioning adhesive film is distributed in a sectional manner, and a plurality of sections are distributed on the battery piece.
Furthermore, the adhesive positioning adhesive film and the welding strip are distributed in an intersecting manner, and the intersecting angle is 60-90 degrees.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (8)
1. A manufacturing approach of the photovoltaic battery pack, the photovoltaic battery pack formed by interconnecting a plurality of battery slices, according to the circuit typesetting shaping; each battery piece is provided with a surface and a back, fine grid line electrodes for collecting current are arranged on the surface and the back, and main grid line electrodes are not arranged;
the manufacturing method is characterized by comprising the following steps: fixing one side of a welding strip on the surface of the battery piece through an adhesive positioning adhesive film, wherein a plurality of welding strips are arranged and arranged on the surface of the battery piece in parallel, and preliminarily pressing the welding strip and the surface of the battery piece; fixing the other side of the welding strip on the back of the adjacent battery piece through a bonding and positioning adhesive film, and preliminarily pressing the welding strip and the back of the battery piece;
connecting a plurality of battery pieces to form a battery piece assembly through the method;
arranging and forming the positioned battery piece assembly according to a circuit, adding a packaging assembly, inputting the packaging assembly into a laminating machine, and laminating the welding strip and the bonding positioning adhesive film to fuse the welding strip and the fine grid line electrode on the surface of the battery piece;
and finally, mounting the junction box and the frame to finish the manufacture of the photovoltaic cell assembly.
2. The method of claim 1, wherein the solder strip is a low temperature solder strip, and the solder strip is a tin-coated metal solder strip, and the melting temperature of the tin layer is not higher than 150 ℃.
3. The method as claimed in claim 1, wherein the adhesive positioning film has a plurality of air holes.
4. The method as claimed in claim 1, wherein the adhesive positioning film is located above the solder strip on the surface of the cell; on the back of the battery piece, the bonding positioning adhesive film is positioned below the welding strip; namely, the welding strip is positioned between the bonding positioning adhesive film and the battery piece and is abutted against the battery piece.
5. The manufacturing method of the photovoltaic cell module as claimed in claim 1, wherein the width of the adhesive positioning film is 3-20 mm larger than that of the solder strip, so as to ensure that the adhesive tape can effectively fix the solder strip.
6. The method as claimed in claim 5, wherein the adhesive positioning film is disposed parallel to the solder strip.
7. The method as claimed in claim 5, wherein the adhesive positioning film is disposed in a plurality of segments on the cell sheet.
8. The method as claimed in claim 5, wherein the adhesive positioning film intersects the solder strip at an angle of 60-90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111332920.XA CN114068734A (en) | 2021-11-11 | 2021-11-11 | Manufacturing method of photovoltaic cell assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111332920.XA CN114068734A (en) | 2021-11-11 | 2021-11-11 | Manufacturing method of photovoltaic cell assembly |
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| CN114068734A true CN114068734A (en) | 2022-02-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115050850A (en) * | 2022-07-13 | 2022-09-13 | 晶澳(扬州)新能源有限公司 | Battery string, photovoltaic module and preparation method |
| CN115188836A (en) * | 2022-06-02 | 2022-10-14 | 浙江爱康光电科技有限公司 | High-density photovoltaic module without main grid and preparation method thereof |
| CN115295655A (en) * | 2022-10-08 | 2022-11-04 | 浙江制能科技有限公司 | IBC battery pack and manufacturing method thereof |
| CN115295653A (en) * | 2022-10-08 | 2022-11-04 | 浙江制能科技有限公司 | Battery and welding strip connecting structure and battery assembly thereof |
| CN115295654A (en) * | 2022-10-08 | 2022-11-04 | 浙江制能科技有限公司 | IBC battery pack with conductive adhesive and manufacturing method thereof |
| CN115295656A (en) * | 2022-10-08 | 2022-11-04 | 浙江制能科技有限公司 | Manufacturing method of battery assembly |
| CN115302120A (en) * | 2022-09-16 | 2022-11-08 | 常州时创能源股份有限公司 | Welding method of battery piece and photovoltaic prefabricated part |
| CN115411127A (en) * | 2022-08-30 | 2022-11-29 | 苏州爱康光电科技有限公司 | Battery assembly and preparation method and application thereof |
| WO2023138709A1 (en) * | 2022-08-30 | 2023-07-27 | 苏州小牛自动化设备有限公司 | Photovoltaic module manufacturing method, battery module, battery string and photovoltaic module |
| CN116825902A (en) * | 2023-08-31 | 2023-09-29 | 浙江制能科技有限公司 | Film coating system for photovoltaic module, film coating method and preparation method of photovoltaic module |
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