CN110649118A - Piece-splicing photovoltaic module - Google Patents
Piece-splicing photovoltaic module Download PDFInfo
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- CN110649118A CN110649118A CN201910821751.2A CN201910821751A CN110649118A CN 110649118 A CN110649118 A CN 110649118A CN 201910821751 A CN201910821751 A CN 201910821751A CN 110649118 A CN110649118 A CN 110649118A
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- benzophenone
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- 238000003466 welding Methods 0.000 claims abstract description 45
- 238000000576 coating method Methods 0.000 claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 230000007704 transition Effects 0.000 claims abstract description 16
- -1 acryloxy Chemical group 0.000 claims description 26
- 239000012965 benzophenone Substances 0.000 claims description 23
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 claims description 18
- 239000000178 monomer Substances 0.000 claims description 14
- 229920002050 silicone resin Polymers 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 11
- 125000002091 cationic group Chemical group 0.000 claims description 9
- 239000003999 initiator Substances 0.000 claims description 9
- 238000006116 polymerization reaction Methods 0.000 claims description 9
- 238000009966 trimming Methods 0.000 claims description 8
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 claims description 6
- 150000004982 aromatic amines Chemical group 0.000 claims description 6
- 150000008365 aromatic ketones Chemical class 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 4
- 125000003356 phenylsulfanyl group Chemical group [*]SC1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 claims description 4
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 claims description 4
- 244000028419 Styrax benzoin Species 0.000 claims description 3
- 235000000126 Styrax benzoin Nutrition 0.000 claims description 3
- 235000008411 Sumatra benzointree Nutrition 0.000 claims description 3
- 150000001336 alkenes Chemical class 0.000 claims description 3
- WURBFLDFSFBTLW-UHFFFAOYSA-N benzil Chemical compound C=1C=CC=CC=1C(=O)C(=O)C1=CC=CC=C1 WURBFLDFSFBTLW-UHFFFAOYSA-N 0.000 claims description 3
- 229960002130 benzoin Drugs 0.000 claims description 3
- ISAOCJYIOMOJEB-UHFFFAOYSA-N desyl alcohol Natural products C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 claims description 3
- 235000019382 gum benzoic Nutrition 0.000 claims description 3
- MGFYSGNNHQQTJW-UHFFFAOYSA-N iodonium Chemical compound [IH2+] MGFYSGNNHQQTJW-UHFFFAOYSA-N 0.000 claims description 3
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium Chemical compound [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- 229910000679 solder Inorganic materials 0.000 abstract description 9
- 238000010030 laminating Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000010949 copper Substances 0.000 abstract description 3
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 239000010410 layer Substances 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 4
- OZMLUMPWPFZWTP-UHFFFAOYSA-N 2-(tributyl-$l^{5}-phosphanylidene)acetonitrile Chemical compound CCCCP(CCCC)(CCCC)=CC#N OZMLUMPWPFZWTP-UHFFFAOYSA-N 0.000 description 3
- 101100226004 Rattus norvegicus Erc2 gene Proteins 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 229910021419 crystalline silicon Inorganic materials 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- OZIZEXQRIOURIJ-UHFFFAOYSA-N 1-(4-benzoylphenyl)pyrrole-2,5-dione Chemical compound C=1C=C(N2C(C=CC2=O)=O)C=CC=1C(=O)C1=CC=CC=C1 OZIZEXQRIOURIJ-UHFFFAOYSA-N 0.000 description 1
- CWDCEIXHDGFNRS-UHFFFAOYSA-N 1-[4-(4-chlorobenzoyl)phenyl]pyrrole-2,5-dione Chemical compound C1=CC(=CC=C1C(=O)C2=CC=C(C=C2)Cl)N3C(=O)C=CC3=O CWDCEIXHDGFNRS-UHFFFAOYSA-N 0.000 description 1
- SPUXJPOMOTYFAY-UHFFFAOYSA-N 1-[4-[4-[4-(2,5-dioxopyrrol-1-yl)phenyl]sulfanylbenzoyl]phenyl]pyrrole-2,5-dione Chemical compound O=C(c1ccc(Sc2ccc(cc2)N2C(=O)C=CC2=O)cc1)c1ccc(cc1)N1C(=O)C=CC1=O SPUXJPOMOTYFAY-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- JUJWROOIHBZHMG-UHFFFAOYSA-N pyridine Substances C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- 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
- H01L31/04—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
- H01L31/0512—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 made of a particular material or composition of materials
-
- 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
Abstract
The invention discloses a spliced photovoltaic module, which comprises a welding strip and a battery piece, wherein the welding strip is divided into a middle section, head sections at two ends and a transition section between the middle section and the head sections, and the thickness D of the head sections1Thickness D of middle section2Thickness of the transition section from D1To D2Gradually change, the solder strip is bent with the zigzag, and its vertical section department is in between the side cut of two adjacent battery pieces and with the side cut laminating, and vertical section is the partly of middle section, a side surface of head and the surface laminating of battery piece, has insulating coating in the position with the side cut laminating on the vertical section. According to the invention, through optimizing the structure of the welding strip and optimizing the connection between the welding strip and the battery piece through the insulating coating, the soft contact between the welding strip and the battery piece is realized, the coating is complete in the welding and laminating processes of the welding strip and the battery piece, the welding strip and the battery piece are insulated and have no short circuit, and the insulating coating and the copper welding strip have good bonding performance, so that the piece gap between the battery pieces is infinitely close to 0 and has higher CTM.
Description
Technical Field
The invention relates to a photovoltaic assembly, in particular to a spliced photovoltaic assembly.
Background
At present, the higher electricity consumption cost is still the main factor restricting the photovoltaic to occupy the energy mainstream market, and the current bottleneck can be broken through only by reducing cost and improving efficiency. At present, the efficiency improving method for mass production comprises technologies such as half-chip, double-sided, multi-main grid and tile stacking, which leads to the great increase of the power of the photovoltaic module monomer, and the reported power of the module monomer breaks through 450W.
However, the power of a half-piece lifting photovoltaic module is limited, about 5W can be lifted, the superposition multi-main-grid technology can be further lifted to 10W, and the power gain of the laminated tile can be further improved to 30W, but the lifting space of the half-piece and multi-main-grid technology is limited, the laminated tile is realized by the staggered superposition of the battery pieces, the piece spacing is 0, and the number of the battery pieces is increased, but the CTM of the laminated tile assembly is low, so that the cost of a single tile is high, and meanwhile, the conductive adhesive system is lack of outdoor long-term application experience.
A back plate, a second EVA (ethylene-vinyl acetate copolymer), a cell sheet layer, a first EVA and a glass panel are sequentially arranged on a frame from inside to outside, an EPE (ethylene-propylene-diene monomer) insulating strip and an EPE insulating block are arranged at one end of the cell sheet layer in a matched mode, the cell sheet layer comprises 36-72 cells, thin grids are transversely arranged on the cells, 9-15 main grids are vertically arranged on the cells, interconnecting strips of the cell sheet layer are connected with bus bars in a matched mode, the interconnecting strips are metal wire circular tin-coated welding strips, and the diameter of the metal wire circular tin-coated welding strips is 0.3-0.5 mm. According to the multi-main-grid solar photovoltaic module, the metal wire circular welding strips are adopted for welding, the elongation is larger than or equal to 30%, and the tensile strength is larger than or equal to 150 Mpa; by adopting the MBB12 main grid battery, the silver paste consumption can be reduced by 64 percent, and the production cost is greatly reduced; the conversion efficiency of the component is more than or equal to 16.8 percent.
However, in the prior art, the connection is realized through the circular welding strips, certain battery piece gaps need to be reserved to reduce the stress borne by the battery, and the existence of the gaps tends to increase the module type and reduce the module efficiency.
A photovoltaic laminated assembly (China, publication number: 106449818A, publication date: 2017-02-22) with bypass diodes comprises 4 regions, each region comprises a plurality of battery strings consisting of crystalline silicon batteries or crystalline silicon sliced batteries, the battery strings in each region are connected in parallel, circuits among the regions are connected in series, a bypass diode is used for protecting a first region and a second region, a bypass diode is used for protecting a third region and a fourth region, the bypass diode is positioned in the center of the assembly, and positive and negative cables of the assembly are led out from a junction box, close to the edge of the assembly, of the assembly.
However, in the prior art, the battery is staggered in an interactive manner through the conductive adhesive, on one hand, the conductive adhesive system still lacks sufficient outdoor verification, and meanwhile, the efficiency of the assembly is further reduced due to the non-reflective design of the battery.
Disclosure of Invention
The purpose of the invention is as follows: in view of the above problems, an object of the present invention is to provide a tiled photovoltaic module, which reduces the gap between the cells for solder ribbon interconnection and improves the module CTM.
The technical scheme is as follows: the utility model provides a piece-splicing photovoltaic module, is including welding area, battery piece, weld the area and divide into the head segment at middle section, both ends and be in the middle section with changeover portion between the head segment, the thickness D of head segment1Thickness D of the middle section2The thickness of said transition section is from D1To D2Gradually changing, bending the welding strip in a Z shape, enabling a vertical section of the welding strip to be located between the trimming edges of the two adjacent battery pieces and attached to the trimming edges, enabling the vertical section to be a part of the middle section, attaching the surface of one side of the head to the surface of the battery piece, and enabling the vertical section to be provided with an insulating coating at the portion attached to the trimming edges.
Further, the thickness D10.2-0.4 mm, the thickness D2To said thickness D 11/2-1/5, the length L of the transition section is 2D1～10D1。
Further, the transition section is gradually changed in the thickness direction of one side.
Furthermore, the transition section is symmetrically gradually changed in the thickness direction of two sides.
Furthermore, the thickness of the insulating coating is 15-200 mu m.
The insulating coating layer is formed by spraying a polymerization substrate on the surface of the solder strip, and then performing ultraviolet curing by using a photoinitiator or a cationic initiator, wherein the polymerization substrate is one of an epoxy-based silicone resin, an acryloxy-based or methacryloxy-based silicone resin, an olefin-based silicone resin, and a silanol-based silicone resin, the photoinitiator is an aromatic amine-based monomer or an aromatic ketone-based monomer, the cationic initiator is one of iodonium, sulfonium alkali, and alkoxypyridine, and the amount of the photoinitiator or the cationic initiator is 0.1 to 2mol/g of the polymerization substrate.
Further, the aromatic amine monomer is one of benzoin ethers, benzil ketals and acetophenone, and the aromatic ketone monomer is one of benzophenone, polyethylene glycol-benzophenone, 4-maleimide benzophenone, 4-chloro-4 '-maleimide benzophenone and 4-maleimide-4' - [ (4-maleimide) phenylthio ] benzophenone.
Has the advantages that: compared with the prior art, the invention has the advantages that: through optimizing the welding strip structure and optimizing the connection between the welding strip and the battery piece through the insulating coating, the soft contact between the welding strip and the battery piece is realized, the coating is complete in the welding process of the welding strip and the battery piece and the laminating process of the welding strip and the battery piece, the welding strip and the battery piece are insulated and have no short circuit, and the insulating coating and the copper welding strip have good combination performance, so that the piece gap between the battery pieces is infinitely close to 0 and has higher CTM.
Drawings
FIG. 1 is a schematic view of a connection cross section of a solder strip and a battery plate;
FIG. 2 is a front view of the weld bead;
FIG. 3 is a cross-sectional view of FIG. 2, showing one of the weld beads;
FIG. 4 is a cross-sectional view of FIG. 2, showing a second embodiment of the solder strip;
fig. 5 is a cross-sectional view of fig. 2, showing a third structural view of the solder strip.
Detailed Description
The invention is further elucidated with reference to the drawings and the embodiments. These examples are intended to illustrate the invention and are not intended to limit the scope of the invention.
A tiled photovoltaic module, as shown in figure 1, comprises solder strips 1 and battery pieces 2.
Referring to fig. 2 and 3, the solder strip 1 is divided into a middle section 11, two end head sections 12, and a transition section 13 between the middle section 11 and the head sections 12, wherein the thickness D of the head sections 121Thickness D of middle section 112The thickness of the transition section 13 is from D1To D2Gradual change of thickness D10.2-0.4 mm, thickness D2Is a thickness D 11/2-1/5, the length L of the transition section 13 is 2D1～10D1。
The welding strip 1 is bent in a Z shape, a vertical section 14 of the welding strip is located between the cutting edges 21 of the two adjacent battery pieces 2 and attached to the cutting edges 21, the vertical section 14 is a part of the middle section 11, at least the part, attached to the cutting edges 21, of the vertical section 14 is provided with an insulating coating 3, the thickness of the insulating coating 3 is 15-200 mu m, and one side surface of the head 12 is attached to the surfaces of the battery pieces 2.
The transition section 13 is symmetrically tapered in the thickness direction of both sides, or as shown in fig. 4 and 5, the transition section 13 is tapered in the thickness direction of one side.
The shape of the welding strip is a slender flat structure with gradually changed thickness formed by locally stamping the circular welding strip, and the thickness of the transition section is gradually changed, so that the welding strip is prevented from being broken due to over-concentrated stress. Because the metallographic phase in the welding strip in the stamping area is disordered, the internal stress is concentrated, the hardness is increased, and meanwhile, the battery trimming is fragile, if the battery trimming is welded with the stamping welding strip in a direct contact manner, the battery splitting is easily caused by the impact of the stress and the hardness, the welding contact between the stamping part and the battery needs to be avoided as much as possible, and therefore, the shapes of the welding strip are preferably shown in the attached drawings 3 and 5.
In order to further reduce the inter-cell distance between adjacent battery cells, a stamped welding strip region (i.e., a middle section 11) needs to be arranged in a vertical spacing region between adjacent battery cells, but short circuits may be caused by the fact that the battery cells have electric leakage at the cut edges and are connected through the welding strips when the inter-cell distance is reduced to 0, and therefore the stamping welding strip region needs to be subjected to insulation treatment, namely, an insulation coating 3 is arranged.
The insulating coating 3 is formed by spraying a polymerization substrate on the surface of the solder strip 1 and then performing ultraviolet curing by using a photoinitiator or a cationic initiator, wherein the polymerization substrate is one of epoxy-based silicone, acryloxy-based or methacryloxy-based silicone, olefin-based silicone and silanol-based silicone, the photoinitiator is an aromatic amine-based monomer or an aromatic ketone-based monomer, the aromatic amine-based monomer is one of benzoin ethers, benzil ketals and acetophenone, the aromatic ketone-based monomer is one of benzophenone, polyethylene glycol-benzophenone, 4-maleimidobenzophenone, 4-chloro-4 '-maleimidobenzophenone, 4-maleimido-4' - [ (4-maleimido) phenylthio ] benzophenone, and the cationic initiator is iodonium, and, One of sulfonium base and alkoxy pyridine, and the amount of the photoinitiator or cationic initiator is 0.1-2 mol/g of the polymerization matrix.
And (3) completely curing the resin in the surface drying time, covering filter paper on a curing film according to the national standard GB1728-79, pressing a 200g weight on the curing film for 30s, removing the weight, turning over the curing film, and considering that the surface is dried if the weight can freely fall at the moment.
Table 1 lists: taking acryloxy resin as a resin substrate, and taking benzophenone (namely BP), 4-maleimide benzophenone (namely MBP), 4-chloro-4 '-maleimide benzophenone (namely CMBP), 4-maleimide-4' - [ (4-maleimide) phenylthio ] benzophenone (namely MMTBP) and polyethylene glycol-benzophenone polymer (namely PEG-BP) as photoinitiators respectively to form the technological parameters of the insulating coating.
TABLE 1
Table 2 lists: the preparation method comprises the steps of taking methacryloxy resin as a resin substrate, taking benzophenone (namely BP), 4-maleimide benzophenone (namely MBP), 4-chloro-4 '-maleimide benzophenone (namely CMBP), 4-maleimide-4' - [ (4-maleimide) phenylthio ] benzophenone (namely MMTBP) and polyethylene glycol-benzophenone polymer (namely PEG-BP) as photoinitiators, wherein the dosage of the photoinitiators is 0.24g/mol of that of a polymeric substrate, and the irradiation time of a 1KW ultraviolet lamp is 100s, the wavelength is 365nm to form insulating coatings, and the performance parameters of each insulating coating.
TABLE 2
Table 3 lists: acryloxy resin, methacryloxy resin, epoxy phenyl silicone resin, silanol silicone resin and methyl vinyl hydrocarbon silicone resin are respectively used as resin matrixes, 4-chloro-4' -maleimide benzophenone (namely CMBP) is used as a photoinitiator, the dosage of the photoinitiator is 0.24g/mol of the polymerized matrixes, 1KW ultraviolet lamp is used for irradiating for 50s and the wavelength is 365nm, so that insulating coatings are formed, and the performance parameters of each insulating coating are determined.
From the comprehensive tables 1-3, the insulating coating has the advantages of softness, high temperature resistance, high impedance and no falling off, the softness ensures that the welding strip is in soft contact with the battery piece, the high temperature resistance ensures that the coating is complete in the welding and laminating processes, the high impedance ensures that the welding strip is insulated from the battery piece and has no short circuit, and the falling off does not ensure that the insulating coating and the copper welding strip have good bonding performance.
The spliced photovoltaic module can realize that the gap between the battery pieces is infinitely close to 0 and has higher CTM (namely, the power gain of the battery after being packaged into the module).
Claims (7)
1. A piece photovoltaic module which characterized in that: including welding area (1), battery piece (2), weld area (1) and divide into head segment (12) at middle section (11), both ends and be in middle section (11) with changeover portion (13) between head segment (12), the thickness D of head segment (12)1Thickness D of the middle section (11)2The thickness of the transition section (13) is from D1To D2Gradually changing, the welding strip (1) is bent in a Z shape, a vertical section (14) of the welding strip is located between the trimming edges (21) of the two adjacent battery pieces (2) and attached to the trimming edges (21), the vertical section (14) is a part of the middle section (11), one side surface of the head (12) is attached to the surface of the battery pieces (2), and an insulating coating (3) is arranged on the vertical section (14) at the position attached to the trimming edges (21).
2. The tile photovoltaic module of claim 1, wherein: the thickness D10.2-0.4 mm, the thickness D2To said thickness D11/2-1/5, the length L of the transition section (13) being 2D1～10D1。
3. The tile photovoltaic module of claim 1, wherein: the transition section (13) is gradually changed in the thickness direction of one side.
4. The tile photovoltaic module of claim 1, wherein: the transition section (13) is symmetrically gradually changed in the thickness direction of two sides.
5. The tile photovoltaic module of claim 1, wherein: the thickness of the insulating coating (3) is 15-200 mu m.
6. The tile photovoltaic module of claim 1, wherein: the insulating coating (3) is formed by spraying a polymerization substrate on the surface of the welding strip (1) and then performing ultraviolet curing by using a photoinitiator or a cationic initiator, wherein the polymerization substrate is one of an epoxy-based silicone resin, an acryloxy-based or methacryloxy-based silicone resin, an olefin-based silicone resin, and a silanol-based silicone resin, the photoinitiator is an aromatic amine-based monomer or an aromatic ketone-based monomer, the cationic initiator is one of iodonium, sulfonium alkali, and alkoxypyridine, and the amount of the photoinitiator or the cationic initiator is 0.1 to 2mol/g of the polymerization substrate.
7. The tile photovoltaic module of claim 6, wherein: the aromatic amine monomer is one of benzoin ethers, benzil ketals and acetophenone, and the aromatic ketone monomer is one of benzophenone, polyethylene glycol-benzophenone, 4-maleimide benzophenone, 4-chloro-4 '-maleimide benzophenone and 4-maleimide-4' - [ (4-maleimide) phenylthio ] benzophenone.
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| CN201910821751.2A CN110649118B (en) | 2019-09-02 | 2019-09-02 | Piece-splicing photovoltaic module |
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| CN201910821751.2A CN110649118B (en) | 2019-09-02 | 2019-09-02 | Piece-splicing photovoltaic module |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111430489A (en) * | 2020-04-29 | 2020-07-17 | 天合光能(宿迁)科技有限公司 | Photovoltaic module and preparation method thereof |
| CN111584684A (en) * | 2020-05-28 | 2020-08-25 | 苏州沃特维自动化系统有限公司 | Processing method of welding strip for welding solar cell piece assembly |
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| CN111933735A (en) * | 2020-08-06 | 2020-11-13 | 中节能太阳能科技（镇江）有限公司 | Laminated photovoltaic module and solder strip for same |
| CN111933735B (en) * | 2020-08-06 | 2024-03-29 | 中节能太阳能科技（镇江）有限公司 | Welding strip for laminated photovoltaic module and laminated photovoltaic module |
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Effective date of registration: 20211230 Address after: 100144 Building 1, No. 3, Xijing Road, Badachu high tech park, Shijingshan District, Beijing Patentee after: CECEP SOLAR ENERGY TECHNOLOGY Co.,Ltd. Address before: No.9, Beishan Road, New District, Zhenjiang City, Jiangsu Province Patentee before: CECEP SOLAR ENERGY TECHNOLOGY (ZHENJIANG) Co.,Ltd. Patentee before: Cecep Solar Energy Technology Co., Ltd |