CN114512573A - Welding process for stress-free welding equipment for cell in photovoltaic industry - Google Patents
Welding process for stress-free welding equipment for cell in photovoltaic industry Download PDFInfo
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- CN114512573A CN114512573A CN202210330056.8A CN202210330056A CN114512573A CN 114512573 A CN114512573 A CN 114512573A CN 202210330056 A CN202210330056 A CN 202210330056A CN 114512573 A CN114512573 A CN 114512573A
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- 238000003466 welding Methods 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000008569 process Effects 0.000 title claims abstract description 31
- 239000003292 glue Substances 0.000 claims abstract description 71
- 238000007639 printing Methods 0.000 claims abstract description 17
- 230000000007 visual effect Effects 0.000 claims abstract description 6
- 238000007664 blowing Methods 0.000 claims description 15
- 238000001723 curing Methods 0.000 claims description 12
- 238000005286 illumination Methods 0.000 claims description 12
- 238000007650 screen-printing Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000004026 adhesive bonding Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 238000003848 UV Light-Curing Methods 0.000 claims description 2
- 239000012943 hotmelt Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 238000012858 packaging process Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920005749 polyurethane resin Polymers 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
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- 229920006305 unsaturated polyester Polymers 0.000 description 1
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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
- H01L31/18—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
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
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- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/12—Stencil printing; Silk-screen printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/009—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using thermal means, e.g. infrared radiation, heat
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—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
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
-
- 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
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Abstract
The invention belongs to the technical field of photovoltaics, and particularly relates to a welding process for a cell piece stress-free welding device in the photovoltaic industry, which comprises a plurality of steps of cell piece visual positioning, front and back surface glue printing, cell piece one-side welding strip laying, cell piece other-side welding strip laying, glue solidification and string manufacturing.
Description
Technical Field
The invention relates to the technical field of photovoltaics, in particular to a welding process of a cell stress-free welding device in the photovoltaic industry.
Background
The photovoltaic industry is rapidly developed under the energy crisis, and the key for further popularization of photovoltaic application is to improve the photoelectric conversion efficiency of the solar cell and reduce the manufacturing cost of the cell. The welding process in the existing battery piece production process is mostly divided into two types:
the traditional dense grid welding process comprises the following steps: welding by adopting a high-temperature packaging process, namely coating the soldering flux on the welding strip, and melting the soldering tin on the surface of the welding strip in a heating mode to fix the welding strip on the surface of the battery piece; the direct-connection welding and packaging process of the welding strip and the battery piece is adopted, and the heating temperature is high. With the thickness of the battery piece becoming thinner and thinner, the battery piece can be bent more greatly in the traditional welding belt and battery piece direct connection welding packaging mode due to too large stress difference after welding, so that the welded battery string can generate more defective rates of welding, desoldering, fragment and the like;
and (3) dispensing welding process: glue is dispensed at a designated position by a dispensing system, and then the welding strip is placed at the designated position of the cell, so that the welding strip is just pressed at the glue dispensing position. Heating the battery piece again, and solidifying the glue to achieve the purpose of fixing the welding strip on the surface of the battery piece; however, in this way, the number of welding points on the surface of each battery piece is large, and the dispensing method is low in efficiency; the glue dispensing mode has the advantages that the glue body is single in shape (circular), the glue amount is large, and the shape consistency is lower than that of the printing mode.
Disclosure of Invention
The invention aims to provide a welding process for a cell stress-free welding device in the photovoltaic industry, and aims to solve the problems that the cell is bent greatly due to too large post stress difference, the dispensing mode is low in efficiency, and the glue amount is large in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a welding process for a stress-free welding device of a cell in the photovoltaic industry comprises the following steps:
step 1: the battery piece is visually positioned, the photographing position finishes photographing through a camera, and the visual system analyzes and then sends positioning data to the motion system to finish positioning of the battery piece;
step 2: performing front and back glue printing, blowing dust and impurities on one surface of the battery piece to be printed by a spray gun, and uniformly coating glue on the designated position of the front or back of the battery piece by a screen printing process;
and step 3: laying a welding strip on one surface of the battery piece, laying one welding strip on the front surface or the back surface of the battery piece which is subjected to glue printing in the step 2, and bonding the welding strip with the front surface or the back surface of the battery piece through glue;
and 4, step 4: laying a welding strip on the other surface of the battery piece, laying another welding strip on the other surface of the battery piece, on which the welding strip is not laid in the step (3), and bonding the welding strip with the other surface of the battery piece through glue;
and 5: glue curing, namely performing hot air blowing or UV illumination on the glue on the two sides of the cell in the step 4 to quickly cure the glue;
step 6: and (4) making the battery string, and repeating the step (3), the step (4) and the step (5) in sequence to enable a plurality of battery pieces to be connected in series to form a battery string.
Preferably, in the step 1, the battery piece is arranged on the welding panel, and the welding panel is provided with a protrusion for preventing the battery piece from moving.
Preferably, in the step 2, the screen printing process is to apply glue to the specified positions of the front or back of the cell piece in a strip shape by a gluing machine.
Preferably, the glue in step 2 comprises a hot melt adhesive or a UV glue.
Preferably, the temperature of the air blowing or the UV light in the step 5 is 60-100 degrees, and the UV light curing mode in the step 5 is not limited to an LED lamp or a UV lamp tube.
Preferably, in the step 6, adjacent battery pieces in the plurality of battery pieces are connected in series to form a battery string, and the welding strip is electrically connected with the battery pieces.
Preferably, the front electrode of one battery between the adjacent battery pieces is welded to the back electrode of the other battery, the single battery pieces are connected in series in sequence, and the welding mode is laser welding.
Compared with the prior art, the invention has the beneficial effects that:
1) reducing the stress of welding the welding strip and the battery piece: according to the traditional dense grid welding process, a high-temperature packaging process is adopted, and a welding strip is directly welded on the surface of a cell; the process adopts glue to assist glue connection welding, the welding strip is welded on the surface of the battery piece through the glue, a buffer strip is provided, the stress is small, the stress difference generated between the battery piece and the welding strip can be reduced to the maximum extent, and the reduction of reject ratio such as desoldering and fragment is achieved.
2) Reducing the usage amount of silver paste on the surface of the cell: the welding points of the battery piece used in the process are smaller than those of the dense grid, and welding point silver paste is reduced.
3) Accurately controlling the shape of printing glue dots and the glue using amount: the glue is applied by adopting a printing mode, the glue amount and the shape can be accurately controlled by controlling the shape and the size of the openings of the screen printing plate, and the glue is uniform and consistent.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic view of a series connection structure of a plurality of battery plates according to the present invention;
FIG. 3 is a schematic diagram of the front or back side welding of the battery piece of the present invention.
In the figure: 1 battery piece, 2 colloids and 3 welding strips.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-3, the present invention provides a technical solution:
example 1:
a welding process for a stress-free welding device of a cell in the photovoltaic industry comprises the following steps:
step 1: the method comprises the following steps of visually positioning a battery piece, namely arranging the battery piece on a welding panel, arranging a bulge for preventing the battery piece from moving on the welding panel, limiting the battery piece, finishing photographing by a camera at a photographing position, and sending positioning data to a motion system after the analysis of a visual system to finish the positioning of the battery piece;
step 2: carrying out glue printing on the front side and the back side, blowing off dust and impurities on the side, which is required to be printed, of the battery piece through a spray gun, and simultaneously, uniformly coating epoxy resin in a strip shape on a designated position on the front side or the back side of the battery piece through a gluing machine;
and step 3: laying a welding strip on one surface of the battery piece, laying one welding strip on the front surface or the back surface of the battery piece which is subjected to glue printing in the step 2, and bonding the welding strip with the front surface or the back surface of the battery piece through glue;
and 4, step 4: laying a welding strip on the other surface of the battery piece, laying another welding strip on the other surface of the battery piece, on which the welding strip is not laid in the step (3), and bonding the welding strip with the other surface of the battery piece through glue;
and 5: curing the glue, namely blowing and heating the glue on the two sides of the battery piece in the step 4 or quickly curing the glue by adopting a UV illumination mode, wherein the blowing or UV illumination temperature is 60 ℃, and the UV illumination curing mode is not limited to an LED lamp or a UV lamp tube;
step 6: and (3) manufacturing a string, and repeating the step (3), the step (4) and the step (5) in sequence to enable a plurality of battery pieces to be connected in series to form a battery string, wherein adjacent battery pieces in the plurality of battery pieces are connected in series to form the battery string, the welding strip is electrically connected with the battery pieces, the front electrode of one battery between the adjacent battery pieces is welded to the back electrode of the other battery, the single battery pieces are connected in series in sequence, and the welding mode adopts laser welding.
The process can reduce the stress difference between the battery piece and the welding strip to the maximum extent, reduce the reject ratio of desoldering, chipping and the like, apply glue by adopting a printing mode, accurately control the glue amount and shape by controlling the shape and size of the opening of the screen printing plate, and have good uniformity and consistency of glue application.
Example 2:
a welding process for a stress-free welding device of a cell in the photovoltaic industry comprises the following steps:
step 1: the method comprises the following steps of visually positioning a battery piece, namely arranging the battery piece on a welding panel, arranging a bulge for preventing the battery piece from moving on the welding panel, limiting the battery piece, finishing photographing at a photographing position through a camera, and sending positioning data to a motion system after the visual system analyzes the positioning data to finish positioning the battery piece;
step 2: carrying out glue printing on the front side and the back side, blowing off dust and impurities on the side, which is required to be printed, of the battery piece through a spray gun, and simultaneously, uniformly coating acrylic resin in a strip shape on a designated position on the front side or the back side of the battery piece through a gluing machine;
and step 3: laying a welding strip on one surface of the battery piece, laying one welding strip on the front surface or the back surface of the battery piece which is subjected to glue printing in the step 2, and bonding the welding strip with the front surface or the back surface of the battery piece through glue;
and 4, step 4: laying a welding strip on the other surface of the battery piece, laying another welding strip on the other surface of the battery piece, on which the welding strip is not laid in the step (3), and bonding the welding strip with the other surface of the battery piece through glue;
and 5: curing the glue, namely blowing and heating the glue on the two sides of the battery piece in the step 4 or quickly curing the glue by adopting a UV illumination mode, wherein the temperature of blowing or UV illumination is 70 ℃, and the UV illumination curing mode is not limited to an LED lamp or a UV lamp tube;
step 6: and (3) manufacturing a string, and repeating the step (3), the step (4) and the step (5) in sequence to enable a plurality of battery pieces to be connected in series to form a battery string, wherein adjacent battery pieces in the plurality of battery pieces are connected in series to form the battery string, the welding strip is electrically connected with the battery pieces, the front electrode of one battery between the adjacent battery pieces is welded to the back electrode of the other battery, the single battery pieces are connected in series in sequence, and the welding mode adopts laser welding.
The process can reduce the stress difference between the battery piece and the welding strip to the maximum extent, achieves the aim of reducing the reduction of reject welding, piece breaking and other reject ratios, applies glue by adopting a printing mode, can accurately control the glue amount and shape by controlling the shape and the size of the opening of the screen printing plate, and has good uniformity and consistency of glue application.
Example 3:
a welding process for a stress-free welding device of a cell in the photovoltaic industry comprises the following steps:
step 1: the method comprises the following steps of visually positioning a battery piece, namely arranging the battery piece on a welding panel, arranging a bulge for preventing the battery piece from moving on the welding panel, limiting the battery piece, finishing photographing by a camera at a photographing position, and sending positioning data to a motion system after the analysis of a visual system to finish the positioning of the battery piece;
step 2: carrying out glue printing on the front side and the back side, blowing off dust and impurities on the side, which is required to be printed, of the battery piece through a spray gun, and simultaneously, uniformly coating polyurethane resin in a strip shape on a designated position on the front side or the back side of the battery piece through a gluing machine;
and step 3: laying a welding strip on one surface of the battery piece, laying one welding strip on the front surface or the back surface of the battery piece which is subjected to glue printing in the step 2, and bonding the welding strip with the front surface or the back surface of the battery piece through glue;
and 4, step 4: laying a welding strip on the other surface of the battery piece, laying another welding strip on the other surface of the battery piece, on which the welding strip is not laid in the step (3), and bonding the welding strip with the other surface of the battery piece through glue;
and 5: curing the glue, namely blowing and heating the glue on the two sides of the battery piece in the step 4 or quickly curing the glue by adopting a UV illumination mode, wherein the temperature of blowing or UV illumination is 80 ℃, and the UV illumination curing mode is not limited to an LED lamp or a UV lamp tube;
step 6: and (3) manufacturing a string, and repeating the step (3), the step (4) and the step (5) in sequence to enable a plurality of battery pieces to be connected in series to form a battery string, wherein adjacent battery pieces in the plurality of battery pieces are connected in series to form the battery string, the welding strip is electrically connected with the battery pieces, the front electrode of one battery between the adjacent battery pieces is welded to the back electrode of the other battery, the single battery pieces are connected in series in sequence, and the welding mode adopts laser welding.
The glue used in the above embodiments 1 to 3 includes a hot melt adhesive or a UV curable adhesive, and specifically includes epoxy resin, acrylic resin, polyurethane resin, unsaturated polyester, butyl rubber, nitrile rubber, and the like.
The process can reduce the stress difference between the battery piece and the welding strip to the maximum extent, achieves the aim of reducing the reduction of reject welding, piece breaking and other reject ratios, applies glue by adopting a printing mode, can accurately control the glue amount and shape by controlling the shape and the size of the opening of the screen printing plate, and has good uniformity and consistency of glue application.
| 10 times of | 50 times | 100 times (twice) | 200 times (one time) | |
| Example one | 0.9824 | 0.9826 | 0.9834 | 0.9841 |
| Example two | 0.9832 | 0.9835 | 0.9839 | 0.9844 |
| EXAMPLE III | 0.9864 | 0.9866 | 0.9870 | 0.9875 |
| Close bars welded battery piece | 0.9846 | 0.9856 | 0.9865 | 0.9877 |
| Battery piece for spot welding | 0.9854 | 0.9864 | 0.9876 | 0.9892 |
Through carrying out charge-discharge cycle performance tests on the battery piece adopting the dense grid welding process and the battery piece adopting the spot-gluing welding process in the embodiments 1-3 of the invention and monitoring the pressure value in the battery piece, the internal stress distribution and the change condition of the battery piece are obtained, and the results are shown in the table 1.
While there have been shown and described the fundamental principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A welding process for a stress-free welding device of a cell in the photovoltaic industry is characterized by comprising the following steps of: the method comprises the following steps:
step 1: the battery piece is visually positioned, the photographing position finishes photographing through a camera, and the visual system analyzes and then sends positioning data to the motion system to finish positioning of the battery piece;
step 2: performing front and back glue printing, blowing dust and impurities on one surface of the battery piece to be printed by a spray gun, and uniformly coating glue on the designated position of the front or back of the battery piece by a screen printing process;
and step 3: laying a welding strip on one surface of the battery piece, laying one welding strip on the front surface or the back surface of the battery piece which is subjected to glue printing in the step 2, and bonding the welding strip with the front surface or the back surface of the battery piece through glue;
and 4, step 4: laying a welding strip on the other surface of the battery piece, laying another welding strip on the other surface of the battery piece, on which the welding strip is not laid in the step (3), and bonding the welding strip with the other surface of the battery piece through glue;
and 5: curing the glue, namely blowing and heating the glue on the two sides of the cell in the step 4 or quickly curing the glue by adopting a UV illumination mode;
step 6: and (4) making the battery string, and repeating the step (3), the step (4) and the step (5) in sequence to enable a plurality of battery pieces to be connected in series to form a battery string.
2. The welding process for the stress-free welding equipment of the photovoltaic industry battery piece as claimed in claim 1, is characterized in that: in the step 1, the battery piece is arranged on the welding panel, and the welding panel is provided with a bulge for preventing the battery piece from moving.
3. The welding process for the stress-free welding equipment of the photovoltaic industry battery piece as claimed in claim 1, is characterized in that: and in the step 2, the screen printing process is to coat the glue in a strip shape on the specified position of the front or the back of the cell piece through a gluing machine.
4. The welding process for the stress-free welding equipment of the photovoltaic industry battery piece as claimed in claim 1, is characterized in that: the glue in the step 2 comprises hot melt glue or UV curing glue.
5. The welding process for the stress-free welding equipment of the photovoltaic industry battery piece as claimed in claim 1, is characterized in that: the temperature of the air blowing or the UV illumination in the step 5 is 60-100 degrees.
6. The welding process for the stress-free welding equipment of the photovoltaic industry battery piece as claimed in claim 1, is characterized in that: in the step 6, adjacent battery pieces in the plurality of battery pieces are connected in series to form a battery string, and the welding strips are electrically connected with the battery pieces.
7. The welding process for the stress-free welding equipment of the photovoltaic industry battery plates as claimed in claim 6, is characterized in that: the front electrode of one battery between the adjacent battery pieces is welded to the back electrode of the other battery, the single battery pieces are connected in series in sequence, and the welding mode is laser welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210330056.8A CN114512573A (en) | 2022-03-31 | 2022-03-31 | Welding process for stress-free welding equipment for cell in photovoltaic industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210330056.8A CN114512573A (en) | 2022-03-31 | 2022-03-31 | Welding process for stress-free welding equipment for cell in photovoltaic industry |
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| Publication Number | Publication Date |
|---|---|
| CN114512573A true CN114512573A (en) | 2022-05-17 |
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| CN202210330056.8A Pending CN114512573A (en) | 2022-03-31 | 2022-03-31 | Welding process for stress-free welding equipment for cell in photovoltaic industry |
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Cited By (2)
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| CN114951882A (en) * | 2022-07-11 | 2022-08-30 | 苏州沃特维自动化系统有限公司 | IBC multi-group gate battery string welding method |
| CN115213508A (en) * | 2022-07-11 | 2022-10-21 | 苏州沃特维自动化系统有限公司 | IBC multi-group grid battery string integral welding method |
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| CN114951882A (en) * | 2022-07-11 | 2022-08-30 | 苏州沃特维自动化系统有限公司 | IBC multi-group gate battery string welding method |
| CN115213508A (en) * | 2022-07-11 | 2022-10-21 | 苏州沃特维自动化系统有限公司 | IBC multi-group grid battery string integral welding method |
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