CN113042973A - Photovoltaic module welding strip flattening process welding method - Google Patents
Photovoltaic module welding strip flattening process welding method Download PDFInfo
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- CN113042973A CN113042973A CN202011230140.XA CN202011230140A CN113042973A CN 113042973 A CN113042973 A CN 113042973A CN 202011230140 A CN202011230140 A CN 202011230140A CN 113042973 A CN113042973 A CN 113042973A
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- welding
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- welding strip
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- 238000003466 welding Methods 0.000 title claims abstract description 148
- 238000000034 method Methods 0.000 title claims abstract description 44
- 229910000679 solder Inorganic materials 0.000 claims abstract description 33
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 description 13
- 239000002313 adhesive film Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 239000011324 bead Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005493 welding type Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram 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
- 230000008092 positive effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/186—Particular post-treatment for the devices, e.g. annealing, impurity gettering, short-circuit elimination, recrystallisation
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to a welding method for a photovoltaic module solder strip flattening process, which comprises the following steps: 1) taking a circular welding strip or a triangular welding strip which is a current welding strip; 2) welding the current welding strip on the front side of the battery piece; 3) flattening the unwelded section of the current welding strip to form a flattened welding section; 4) the flattening welding section is welded on the back surface of the battery piece; 5) and sequentially circulating the steps 1) to 4) until the last battery piece is welded.
Description
Technical Field
The invention relates to a photovoltaic module production process, in particular to a photovoltaic module welding strip flattening process welding method.
Background
The photovoltaic module technology development is diversified day by day, and the technical layer such as piece, plate interconnection, many main grids, stitch welding is endless, (photovoltaic) module shipment volume also is the growth promotion trend.
In the prior art, the (photovoltaic) module all uses the solder strip transmission current (series transmission), and the solder strip specification is various with the shape, and common solder strip shape has: the photovoltaic module comprises a circular welding strip, a triangular welding strip and a flat welding strip, wherein the circular welding strip and the triangular welding strip have certain gain effect on the surface of the photovoltaic module when the surface of the photovoltaic module is illuminated, and the circular welding strip and the triangular welding strip are mainly used in the actual production process of the photovoltaic module.
The above-mentioned solder strip that uses at present has the drawback: the circular welding strip and the triangular welding strip are usually welded on the front side of the battery for synergy and are not suitable for back side welding; particularly, the fillet bead is used for the back side, which easily causes hidden cracking of the battery piece; the gram weight of the packaging adhesive film can be improved when the back surface of the circular welding strip is welded; the stress on the cell at the interval between the circular welding strip welding assembly pieces is large, so that the edge is prone to crack and the interval between the small pieces is not facilitated; although the flat solder strip has large contact area and is easy to weld, the flat solder strip can be used for making small chip spacing and packaging by using a low-gram-weight adhesive film, but has no obvious light receiving gain on the surface of the battery piece compared with the triangular solder strip and the circular solder strip. Therefore, for the current solder strip defects, a corresponding solution, namely, an integrated segmented solder strip (refer to fig. 1), also exists at present. The integrated sectional welding strip scheme comprises the following steps: the production process of the welding strip adopts a flattening process. For example, an integral fillet bead (fig. 1, gray filled section) is formed by flattening a bead of a certain length at a certain distance, welding the normal non-flattened position to the front surface of the cell, and welding the flattened position to the back surface of the cell. But the integral segmented solder strip scheme also has the disadvantages that:
1. the manufacturing process of the welding strip needs to know the space between the (photovoltaic) component pieces, the size of the battery piece and the like in advance to set the flattening length, so that the customization is too strong, the difficulty in mass production of the welding strip is high, and the information leakage of a component manufacturer can be caused by purchasing the welding strip in a customized mode;
(photovoltaic) assemblies usually adopt multi-main grids (taking 9 main grids as an example), 9 welding strips need to be welded on each cell simultaneously, the adoption of the integrated segmented welding strips can cause that the flattening and non-flattening lengths of each welding strip are inconsistent, a part of the welding strip needs to be cut down separately, so that the flattening position of each welding strip is consistent, and the process has high requirements on equipment.
3. If the welding strip is cut according to the method, the welding strip positioning by the equipment is possibly abnormal and cannot be identified or misjudged, so that the welding strip at the corresponding position cannot be welded at the corresponding position of the battery piece.
Disclosure of Invention
The invention aims to provide a welding method of a photovoltaic module solder strip in the existing flattening process, which is used for directly welding the existing circular solder strip or triangular solder strip and solving the problems in the background.
In order to achieve the above purpose, the invention adopts the technical scheme that: a photovoltaic module solder strip flattening process welding method comprises the following steps:
1) taking a circular welding strip or a triangular welding strip which is a current welding strip;
2) welding the current welding strip on the front side of the battery piece;
3) flattening the unwelded section of the current welding strip to form a flattened welding section;
4) the flattening welding section is welded on the back surface of the battery piece;
5) and sequentially circulating the steps 1) to 4) until the last battery piece is welded.
Further, after the step 4), the back surface of the flattening solder strip section is packaged on the back surface of the cell sheet by adopting EVA.
And further, the flattening welding section is directly flattened by adopting a die.
Further preferably, the current solder strip is a circular solder strip.
The invention has the technical effects that: 1. welding the current welding strip (namely the circular welding strip or the triangular welding strip) on the front side of the battery piece, wherein the gain effect of the current welding strip (the circular welding strip or the triangular welding strip) is achieved when the front side of the battery piece is illuminated;
2. the flattening welding section is welded on the back surface of the battery piece, the welding area of the current welding strip and the battery piece after flattening is increased, and the back surface false welding and the like are obviously improved;
3. the back side EVA adhesive film (flattening welding section) is thin, so that the gram weight of the back side EVA packaging using the flattening welding section is reduced;
4. the current solder strip flattening process can be compatible with small-space assemblies, and the welding efficiency of the (photovoltaic) assembly is improved;
5. the flattening process of the welding strip is suitable for the current mainstream production welding strip (a circular welding strip or a triangular welding strip);
6. the welding method of the flattening process of the welding strip has strong flexibility, and is suitable for battery plates with different sizes, different types of welding strips, different welding methods and the like;
7. the welding method of the present flattening process of the welding strip greatly reduces the difficulty of the manufacturing process of the welding strip, improves the yield of the welding strip, and can meet the requirement of the welding strip according to the normal process production.
Drawings
FIG. 1 is a block diagram of a one-piece segmented solder strip;
fig. 2 is a structural view of a solder ribbon (round solder ribbon) obtained by the present invention in a flattening process.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A photovoltaic module solder strip flattening process welding method comprises the following steps:
1) taking a circular welding strip or a triangular welding strip which is a current welding strip;
2) welding the current welding strip on the front side of the battery piece;
3) flattening the unwelded section of the current welding strip to form a flattened welding section;
4) the flattening welding section is welded on the back surface of the battery piece;
5) and sequentially circulating the steps 1) to 4) until the last battery piece is welded.
Further, after the step 4), the back surface of the flattening solder strip section is packaged on the back surface of the cell sheet by adopting EVA.
And further, the flattening welding section is directly flattened by adopting a die.
According to the background technology, the type of the current solder strip and the main advantages and disadvantages thereof are mentioned, the welding method of the solder strip flattening process provided by the invention has the following positive effects:
1. welding the current welding strip (namely the circular welding strip or the triangular welding strip) on the front side of the battery piece, wherein the gain effect of the current welding strip (the circular welding strip or the triangular welding strip) is achieved when the front side of the battery piece is illuminated;
2. the flattening welding section is welded on the back surface of the battery piece, the welding area of the current welding strip and the battery piece after flattening is increased, and the back surface false welding and the like are obviously improved;
3. the back side EVA adhesive film (flattening welding section) is thin, so that the gram weight of the back side EVA packaging using the flattening welding section is reduced;
4. the current solder strip flattening process can be compatible with small-space assemblies, and the welding efficiency of the (photovoltaic) assembly is improved;
5. the flattening process of the welding strip is suitable for the current mainstream production welding strip (a circular welding strip or a triangular welding strip);
6. the welding method of the flattening process of the welding strip has strong flexibility, and is suitable for battery plates with different sizes, different types of welding strips, different welding methods and the like;
7. the welding method of the present flattening process of the welding strip greatly reduces the difficulty of the manufacturing process of the welding strip, improves the yield of the welding strip, and can meet the requirement of the welding strip according to the normal process production;
the manufacturing process principle is that the welding strip has stress on the surface of the battery piece when the welding strip is welded, the smaller the distance between the pieces is, the worse the stress is released, the stress cannot be released, the contact surface of the welding strip is flattened to be enlarged, the welding of the welding strip is thinned, the stress can be released, and the welded part (flattening welding section) cannot crack when the battery piece is laminated; the flatter the racket is, the better the stress release is, the smaller the sheet spacing can be, the thinner EVA material can be used, the more the assembly efficiency can be improved, and the cost can be reduced.
This used welding strip of patent can be conventional circle welding strip or triangle welding strip and so on conventional volume production welding strip, and after normal welding battery piece was positive, take out the welding strip and flatten and weld in the battery piece back (the welding strip that flattens this moment has great contact surface with the battery piece surface), circulate current step in proper order until welding to last piece battery.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. A photovoltaic module solder strip flattening process welding method is characterized by comprising the following steps:
1) taking a circular welding strip or a triangular welding strip which is a current welding strip;
2) welding the current welding strip on the front side of the battery piece;
3) flattening the unwelded section of the current welding strip to form a flattened welding section;
4) the flattening welding section is welded on the back surface of the battery piece;
5) and sequentially circulating the steps 1) to 4) until the last battery piece is welded.
2. The photovoltaic module solder strip flattening process welding method according to claim 1, is characterized in that: and (4) packaging the back of the flattening solder strip section obtained in the step 4) on the back of the cell sheet by adopting EVA.
3. The photovoltaic module solder strip flattening process welding method according to claim 2, is characterized in that: and the flattening welding section is directly flattened by adopting a die.
4. The photovoltaic module solder strip flattening process welding method according to claim 3, characterized in that: the current welding strip is a circular welding strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011230140.XA CN113042973A (en) | 2020-11-06 | 2020-11-06 | Photovoltaic module welding strip flattening process welding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011230140.XA CN113042973A (en) | 2020-11-06 | 2020-11-06 | Photovoltaic module welding strip flattening process welding method |
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| Publication Number | Publication Date |
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| CN113042973A true CN113042973A (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011230140.XA Pending CN113042973A (en) | 2020-11-06 | 2020-11-06 | Photovoltaic module welding strip flattening process welding method |
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| Country | Link |
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| CN (1) | CN113042973A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113921640A (en) * | 2021-10-14 | 2022-01-11 | 云上新能源开发(杭州)有限公司 | Series welding process for interconnection material and battery string |
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| CN102412328A (en) * | 2011-10-13 | 2012-04-11 | 英利能源（中国）有限公司 | Injection molding bottom plate and method for packaging solar cell |
| CN102361043A (en) * | 2011-11-15 | 2012-02-22 | 阿特斯(中国)投资有限公司 | Ethylene vinyl acetate (EVA) for encapsulating solar cell |
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Application publication date: 20210629 |