CN112349805B - Photovoltaic module preparation method - Google Patents
Photovoltaic module preparation method Download PDFInfo
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- CN112349805B CN112349805B CN201910730504.1A CN201910730504A CN112349805B CN 112349805 B CN112349805 B CN 112349805B CN 201910730504 A CN201910730504 A CN 201910730504A CN 112349805 B CN112349805 B CN 112349805B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000003466 welding Methods 0.000 claims abstract description 71
- 239000012528 membrane Substances 0.000 claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims description 5
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 5
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 5
- 229920006124 polyolefin elastomer Polymers 0.000 claims description 5
- 239000004800 polyvinyl chloride Substances 0.000 claims description 5
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 5
- 229920005992 thermoplastic resin Polymers 0.000 claims description 5
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000010030 laminating Methods 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013082 photovoltaic technology Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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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
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention provides a preparation method of a photovoltaic module, which comprises the steps of pre-fixing a first conductive wire and a first membrane; pre-fixing a second conductive wire with a second membrane; pre-welding a first conductive wire and a second conductive wire into a conductive wire, wherein the first membrane and the second membrane are respectively positioned on two sides of the conductive wire; and welding the front electrode of one cell with the first conductive wire, and welding the back electrode of the adjacent cell with the second conductive wire. On one hand, the first conductive wire and the second conductive wire are respectively fixed through the first diaphragm and the second diaphragm, so that the first conductive wire and the second conductive wire can be prevented from moving, and the generation of offset welding is avoided; on the other hand, the two sectional conductive wires are pre-welded to form the conductive wires, so that the shapes, structures, welding parameters and the like of the first conductive wire and the second conductive wire can be adaptively adjusted according to different requirements of the front side and the back side of the battery piece, and the selection range of the conductive wires is enlarged.
Description
Technical Field
The invention relates to the field of photovoltaics, in particular to a preparation method of a photovoltaic module.
Background
With the rapid development of photovoltaic technology, photovoltaic power stations occupy a large market at home and abroad, the demand for high-power components is increasing, the cost of the photovoltaic components is reduced, the efficiency and the reliability of the photovoltaic components are improved, and the photovoltaic power generation is always in the direction of effort.
The photovoltaic laminated tile assembly, the splicing technology and the like utilize the area of the assembly to the maximum extent by eliminating or reducing the gaps between the pieces, improve the power of the assembly and become the direction of important development of the industry.
However, the existing solder strip welding method has the problems of splintering/hidden splintering, solder strip welding deviation, small welding tension, solder strip fracture and the like in the laminating process. In view of the above, there is a need for an improved method for manufacturing a photovoltaic module, which solves the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a preparation method of a photovoltaic module.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a photovoltaic module comprises the following steps:
pre-fixing a first conductive line with a first membrane;
pre-fixing a second conductive wire with a second membrane;
prewelding the first conductive wire and the second conductive wire into a conductive wire, wherein the first membrane and the second membrane are respectively positioned on two sides of the conductive wire;
and welding the battery pieces, namely welding the front electrode of one battery piece with the first conductive wire, and welding the back electrode of the adjacent battery piece with the second conductive wire.
Further, the first conductive wire is a circular conductive wire or a triangular conductive wire.
Further, the second conductive wire is a flat conductive wire or a triangular conductive wire.
Further, the first conductive wire is a round conductive wire, the diameter of the round conductive wire is 0.1 mm-0.5 mm, and the thickness of the first membrane is 01 mm-4.5 mm.
Further, the first membrane and the second membrane are thermoplastic resin, and the thermoplastic resin is selected from EVA (ethylene vinyl acetate) films, PVC (polyvinyl chloride) films or POE (polyolefin elastomer) films.
Further, the pre-fixing temperature is 100-150 ℃.
Furthermore, the first conductive wire and the second conductive wire are welded by means of infrared welding, laser welding, electromagnetic welding or hot-press welding.
Furthermore, after the battery pieces are welded, the welding points of the first conducting wire and the second conducting wire are positioned on the front surfaces of the battery pieces, the back surfaces of the battery pieces or between the battery pieces.
Furthermore, after the battery pieces are welded, the distance between every two adjacent battery pieces is-1.8 mm-0.5 mm.
Further, in the laminated assembly, the edge portions of two adjacent battery pieces are overlapped, and the sum of the thicknesses of the first membrane and the second membrane in the overlapped area is not less than the thickness of the conducting wire.
Furthermore, the first conductive wire and the second conductive wire are pre-welded and then the battery piece is welded, and the second membrane is placed first, so that the second conductive wire faces upwards; then placing the first battery piece on the second membrane, and aligning and welding the back electrode of the first battery piece with the second conducting wire; placing the pre-welded conductive wire of the first conductive wire and the second conductive wire, and welding the first conductive wire and the front electrode of the first battery piece in an aligned manner; then placing a second battery piece and aligning and welding a back electrode of the second battery piece with a second conductive wire; and repeating the steps to the last battery piece, placing a first membrane on the front surface of the last battery piece, and aligning and welding the first conducting wire and the front electrode of the last battery piece.
The invention has the beneficial effects that: according to the preparation method of the photovoltaic module, on one hand, the first conducting wire and the second conducting wire are respectively fixed through the first membrane and the second membrane, so that the first conducting wire and the second conducting wire can be prevented from moving, and the generation of offset welding is avoided; on the other hand, the two sectional type conductive wires are pre-welded to form the conductive wires, so that the shapes, structures, welding parameters and the like of the first conductive wires and the second conductive wires can be adaptively adjusted according to different requirements of the front side and the back side of the cell piece, the selection range of the conductive wires is enlarged, and the efficiency of the photovoltaic module can be effectively improved.
Drawings
FIG. 1 is a schematic view of the present invention after a first conductive line is pre-attached to a first membrane;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a schematic view of the present invention after the conductive wire and the second membrane are pre-fixed;
FIG. 4 is a side view of FIG. 3;
FIG. 5 is a schematic illustration of the first conductive wire of FIG. 1 pre-soldered with the second conductive wire of FIG. 3;
FIG. 6 is a side view of FIG. 5;
FIG. 7 is a schematic view of the battery plate before being welded with the conductive wire;
FIG. 8 is a schematic view of another arrangement of battery plates before welding with the conductive wires;
FIG. 9 is a schematic view of another arrangement of battery plates before being welded with the conductive wires;
fig. 10 is a schematic view of the battery piece after welding.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The present application will now be described in detail with reference to specific embodiments thereof as illustrated in the accompanying drawings. These embodiments are not intended to limit the present application, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present application.
In the various illustrations of the present application, certain dimensions of structures or portions may be exaggerated relative to other structures or portions for ease of illustration and, thus, are merely used to illustrate the basic structure of the subject matter of the present application.
Referring to fig. 1 to 10, a method for manufacturing a photovoltaic device according to a preferred embodiment of the present invention will be described.
The preparation method of the photovoltaic module comprises the following steps: s1, pre-fixing the first conductive line 11 and the first diaphragm 12, wherein the pre-fixed structure is as shown in fig. 1 and fig. 2; s2 pre-fixing the second conductive line 21 and the second diaphragm 22, wherein the pre-fixed structure is as shown in fig. 3 and 4; s3 pre-welding the first conductive line 11 and the second conductive line 21 to form a conductive line, where the first membrane 12 and the second membrane 22 are respectively located at two sides of the conductive line, and the pre-welded structure is as shown in fig. 5 and 6; s4 welding the battery plates 4, please refer to fig. 7-10, in which the front electrode of one battery plate 4 is welded to the first conductive wire 11, and the back electrode of the adjacent battery plate 4 is welded to the second conductive wire 21.
According to the method for the photovoltaic module, on one hand, the first conductive line 11 and the second conductive line 21 are respectively fixed through the first membrane 12 and the second membrane 22, so that the first conductive line 11 and the second conductive line 21 can be prevented from moving, and the generation of offset welding is avoided; on the other hand, the two sectional conductive wires are pre-welded to form the conductive wires, so that the shapes, structures, welding parameters and the like of the first conductive wire 11 and the second conductive wire 21 can be adaptively adjusted according to different requirements of the front side and the back side of the battery piece 4, the selection range of the conductive wires is enlarged, and the efficiency of the photovoltaic module can be effectively improved.
It will be understood by those skilled in the art that S1-S4 are for descriptive convenience only and do not represent the order of the steps before and after the preparation process, e.g., the order of the steps of S1 and S2 may be interchanged; s3 and S4 must be located after S1 and S2, and the sequence of steps of S3 and S4 can be interchanged.
Specifically, as shown in fig. 1 and fig. 2, the first conductive wire 11 is located below the first membrane 12, and includes, but is not limited to, a round conductive wire and a triangular conductive wire, and is welded to the front electrode of the cell 4, so that the light acceptance rate of the front of the cell 4 can be increased compared to a conventional flat conductive wire, thereby increasing the cell efficiency.
As shown in fig. 3 and 4, the second conductive wires 21 are located on the first membrane 12, and include but not limited to flat conductive wires or triangular conductive wires, and the contact surface with the back electrode of the battery plate 4 is a plane, so that the problem of cracking or subfissure in the lamination process can be effectively avoided.
In a specific embodiment, as shown in fig. 1 to 6, the first conductive wire 11 is a circular conductive wire, and the second conductive wire 21 is a flat conductive wire, so that different requirements of the front and back sides of the battery sheet 4 can be met. Furthermore, the diameter of the round conductive wire is 0.1mm to 0.5mm, and the thickness of the first membrane 12 is 0.1mm to 4.5mm, so that the round conductive wire can be held, not only is the subsequent operation convenient, but also the battery piece 4 and the round conductive wire can be quickly aligned when the battery string is formed, and the occurrence of offset welding is prevented.
In addition, the first conductive wire 11 and the second conductive wire 21 are made of conductive wire materials commonly used in the existing photovoltaic industry, and can be specifically selected according to the particularity of the cell 4 to be welded, which is not described herein again.
The first membrane 12 and the second membrane 22 are made of thermoplastic resin, including but not limited to EVA film, PVC film, or POE film, and can be pre-fixed with the first conductive wire 11 and the second conductive wire 21 by low-temperature crosslinking, so as to prevent the conductive wires from moving and avoid welding deviation; and the welding of the first conductive wire 11 and the second conductive wire 21 with the battery plate 4 is not affected.
Preferably, the pre-fixing temperatures described in S1 and S2 are 100 ℃ to 150 ℃, preferably 110 ℃ to 130 ℃, enabling rapid and efficient pre-fixing.
In S3, the welding manner of the first conductive line 11 and the second conductive line 21 includes, but is not limited to, infrared welding, laser welding, electromagnetic welding, hot-press welding, and the like, and the welding process is a common technical means in the art and will not be described in detail herein.
In S4, the distance between two adjacent battery plates 4 is-1.8 mm-0.5 mm, the photovoltaic assembly when the gap is less than 0 is called as a shingle assembly, and the photovoltaic assembly when the gap is not less than zero is called as a tile assembly. In the laminated assembly, the edge parts of two adjacent battery pieces 4 are partially overlapped, in the overlapping area, the sum of the thicknesses of the first membrane 12 and the second membrane 22 is not less than the thickness of a conductive wire, and in the laminating process, the conductive wire is not in direct contact with the surfaces of the battery pieces 4, so that the edge stress of the battery pieces 4 is reduced, and the hidden crack is avoided.
After the cell 4 is welded, the welding point 3 of the first conductive wire 11 and the second conductive wire 21 is located on the front side of the cell 4, the back side of the cell 4 or between the two cells 4.
When the photovoltaic module is a laminated module, please refer to fig. 7, the welding point 3 is located between the two battery pieces 4, that is, the welding point 3 is located at the overlapping portion of the two battery pieces 4, and the light absorption rate of the front side of the battery pieces is not affected; referring to fig. 8, the welding point 3 is located on the front surface of the cell 4, that is, the welding point 3 is located on the front surface outside the non-overlapping portion of any cell 4; referring to fig. 9, the welding point 3 is located on the back surface of the cell 4, that is, the welding point 3 is located on the back surface outside the non-overlapping portion of any cell 4, and the light absorption rate on the front surface of the cell is not affected.
When the photovoltaic assembly is a splicing assembly, the welding point 3 is positioned between the two battery pieces 4, namely the welding point 3 is positioned at a splicing gap of the two battery pieces 4; the welding point 3 is positioned on the front surface of the cell 4, namely the welding point 3 is positioned on the front surface of any cell 4; the welding point 3 is located on the back of the cell 4, namely the welding point 3 is located on the back of any cell 4.
In a specific embodiment, the welding of the battery piece 4 is performed after the first conductive wire 11 and the second conductive wire 21 are pre-welded, and the specific process includes: placing the second membrane 22 so that the second conductive wire 21 faces upwards; then, the first battery piece 4 is placed on the second membrane 22, and the back electrode of the first battery piece 4 is aligned and welded with the second conductive wire 21; placing the pre-welded conductive wires of the first conductive wire 11 and the second conductive wire 21, and welding the first conductive wire 11 and the front electrode of the first battery piece 4 in an aligned manner; then placing the second battery piece 4 and aligning and welding the back electrode of the second battery piece with the second conductive wire 21; repeating the steps to the last battery piece 4, placing a first membrane 12 on the front surface of the last battery piece 4, and aligning and welding a first conductive wire 11 with the front electrode of the last battery piece 4; the resulting battery string is shown in fig. 10.
By controlling the relative positions of the two battery pieces 4 and the conducting wire, the welding point 3 is positioned on the front side of the battery piece 4, the back side of the battery piece 4 or between the battery pieces 4; the cell sheets 4 include the overlapping area of the adjacent cell sheets 4 in the tile stack assembly, and also include the gap between the adjacent cell sheets 4 in the tile assembly.
In summary, according to the preparation method of the photovoltaic module of the present invention, on one hand, the first conductive line 11 and the second conductive line 21 are respectively fixed by the first membrane 12 and the second membrane 22, so that the positions of the first conductive line 11 and the second conductive line 21 can be prevented from moving, and the occurrence of off-set soldering can be avoided; on the other hand, the two sectional conductive wires are pre-welded to form the conductive wires, so that the shapes, structures, welding parameters and the like of the first conductive wire and the second conductive wire 21 can be adaptively adjusted according to different requirements of the front side and the back side of the cell 4, the selection range of the conductive wires is enlarged, and the efficiency of the photovoltaic module can be effectively improved.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above list of details is only for the concrete description of the feasible embodiments of the present application, they are not intended to limit the scope of the present application, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present application are intended to be included within the scope of the present application.
Claims (11)
1. A preparation method of a photovoltaic module is characterized by comprising the following steps: the method comprises the following steps:
pre-fixing a first conductive line with a first membrane;
pre-fixing a second conductive wire with a second membrane;
prewelding the first conductive wire and the second conductive wire into a conductive wire, wherein the first membrane and the second membrane are respectively positioned on two sides of the conductive wire;
and pre-welding the first conductive wire and the second conductive wire, then welding the battery pieces, welding the front electrode of one battery piece with the first conductive wire, and welding the back electrode of the adjacent battery piece with the second conductive wire.
2. The method of manufacturing a photovoltaic module according to claim 1, wherein: the first conductive wire is a circular conductive wire or a triangular conductive wire.
3. The method of manufacturing a photovoltaic module according to claim 1, wherein: the second conductive wire is a flat conductive wire or a triangular conductive wire.
4. The method of manufacturing a photovoltaic module according to claim 1, wherein: the first conductive wire is a round conductive wire, the diameter of the round conductive wire is 0.1 mm-0.5 mm, and the thickness of the first membrane is 0.1 mm-4.5 mm.
5. The method of manufacturing a photovoltaic module according to claim 1, wherein: the first membrane and the second membrane are thermoplastic resin, and the thermoplastic resin is selected from an EVA (ethylene vinyl acetate) membrane, a PVC (polyvinyl chloride) membrane or a POE (polyolefin elastomer) membrane.
6. The method of manufacturing a photovoltaic module according to claim 5, wherein: the pre-fixing temperature is 100-150 ℃.
7. The method of manufacturing a photovoltaic module according to claim 1, wherein: the welding mode of the first conducting wire and the second conducting wire is infrared welding, laser welding, electromagnetic welding or hot-press welding.
8. The method of manufacturing a photovoltaic module according to claim 1, wherein: after the battery pieces are welded, the welding points of the first conducting wire and the second conducting wire are positioned on the front sides of the battery pieces, the back sides of the battery pieces or between the battery pieces.
9. The method of manufacturing a photovoltaic module according to claim 1, wherein: after the battery pieces are welded, the distance between every two adjacent battery pieces is-1.8 mm-0.5 mm.
10. The method of manufacturing a photovoltaic module according to claim 1, wherein: in the laminated assembly, the edge parts of two adjacent battery plates are overlapped, and the sum of the thicknesses of the first membrane and the second membrane in the overlapped area is not less than the thickness of the conductive wire.
11. The method for producing a photovoltaic module according to any one of claims 1 to 10, wherein: the welding process of the battery plate comprises the following steps: placing a second membrane so that the second conductive wire faces upwards; then placing the first battery piece on the second membrane, and aligning and welding the back electrode of the first battery piece with the second conducting wire; then placing the conductive wires which are pre-welded with the first conductive wires and the second conductive wires, and welding the first conductive wires and the front electrodes of the first battery pieces in an aligning manner; placing a second battery piece and aligning and welding a back electrode of the second battery piece with a second conductive wire; and repeating the steps to the last battery piece, placing a first membrane on the front surface of the last battery piece, and aligning and welding the first conducting wire and the front electrode of the last battery piece.
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| CN208584119U (en) * | 2018-07-13 | 2019-03-08 | 无锡奥特维科技股份有限公司 | A kind of solar battery welding device |
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| CN112349805A (en) | 2021-02-09 |
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