CN113843502A - Solar cell module laser welding equipment and welding method thereof - Google Patents
Solar cell module laser welding equipment and welding method thereof Download PDFInfo
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- CN113843502A CN113843502A CN202010597294.6A CN202010597294A CN113843502A CN 113843502 A CN113843502 A CN 113843502A CN 202010597294 A CN202010597294 A CN 202010597294A CN 113843502 A CN113843502 A CN 113843502A
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- 238000003466 welding Methods 0.000 title claims abstract description 203
- 238000000034 method Methods 0.000 title claims description 33
- 238000012545 processing Methods 0.000 claims abstract description 88
- 238000012546 transfer Methods 0.000 claims abstract description 44
- 229910000679 solder Inorganic materials 0.000 claims description 63
- 230000000007 visual effect Effects 0.000 claims description 30
- 230000008569 process Effects 0.000 claims description 21
- 230000007246 mechanism Effects 0.000 claims description 11
- 238000003754 machining Methods 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 3
- 239000012634 fragment Substances 0.000 abstract description 6
- 239000005038 ethylene vinyl acetate Substances 0.000 description 11
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 11
- 239000011521 glass Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000003860 storage Methods 0.000 description 7
- 239000011343 solid material Substances 0.000 description 6
- 238000005452 bending Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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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
- B23K26/20—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
- B23K26/70—Auxiliary operations or equipment
-
- 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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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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
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- 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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- Optics & Photonics (AREA)
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- Manufacturing & Machinery (AREA)
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Abstract
The invention provides a laser welding device for a solar cell module, which comprises: the welding machine comprises a processing table board (1), wherein a welded battery assembly (7) can be placed on the processing table board (1); the transfer device (3), the transfer device (3) can move the welding strip and/or the battery piece in the battery assembly (7) to the position of the area of the processing table top (1) where the battery assembly (7) is placed; the laser processing device (2), the battery pack (7) can be welded in laser processing device (2), and the whole breadth of battery pack (7) can be covered in the processing scope of laser processing device (2). The laser processing device is used for welding all the welding strips and the whole battery pieces, and only all the battery pieces and the welding strips need to be moved and carried at one time, so that the risk of fragments of the battery pieces is reduced, and the welding efficiency is improved.
Description
Technical Field
The invention relates to the field of solar cell welding, in particular to solar cell module laser welding equipment and a welding method thereof.
Background
The solar cell module comprises a plurality of cell pieces and welding strips, and a bottom plate and a top plate which clamp the cell pieces and the welding strips, and the solar cell module is required to be welded and connected with the welding strips in the production and manufacturing process so as to manufacture a solar cell panel.
In the welding process, the conventional laser welding equipment for the solar cell module has more times of moving and overturning the cell, for example, patent CN103692086A discloses a series welding equipment for the solar cell, which comprises two welding heads and an overturning mechanism. After a first welding head of the series welding equipment welds the connecting band and the battery piece, the battery piece is required to be turned over by the turning mechanism, and then the battery piece is welded with the other connecting band by the second welding head. The battery piece needs to be turned and moved for many times in the welding process.
In the production process of the traditional solar cell module, the cell pieces and the welding strips need to be welded into a cell string with a specified length. After the multiple groups of battery strings are connected through the bus bars, packaging materials are paved for hot-pressing packaging to manufacture the solar battery assembly. Such production process complex operation, welding efficiency are low, and the number of times that the battery piece removed in welding process is more moreover, has increased the piece risk of battery piece.
Disclosure of Invention
The invention mainly aims to provide laser welding equipment for a solar cell module, which aims to solve the problem of fragment risk caused by a large number of times of moving a cell in the traditional cell welding process.
In order to achieve the above object, according to one aspect of the present invention, there is provided a solar cell module laser welding apparatus including: the processing table top can be used for placing the welded battery component; the transfer device can move the welding strips and/or the battery pieces in the battery assembly to the position of the area on the processing table top where the battery assembly is placed; the laser processing device can weld the battery pack, and the processing range of the laser processing device can cover the whole breadth of the battery pack. And the laser processing device is to all weld area, the whole welding of battery piece, only need all battery pieces and weld the area and only pass through once and move the year, reduced the risk of battery piece, improved welding efficiency moreover.
Furthermore, an auxiliary supporting device is arranged on the processing table top and can reduce the friction force of the movement of the battery pack.
Furthermore, the auxiliary supporting device is a roller or an air floating platform.
Further, the transfer device comprises a manipulator, and the moving range of the manipulator can cover the area of the processing table top where the battery component is placed.
Further, the manipulator is a four-axis linkage device.
Furthermore, the transfer device further comprises a sucker assembly, and the manipulator drives the sucker assembly to place the welding strip and/or the battery piece on the position of the processing table top corresponding to the battery assembly at any angle.
Furthermore, the sucker component can be used for separately transferring the welding strips or the battery pieces or simultaneously transferring the welding strips and the battery pieces. The welding strip and the battery piece can be simultaneously moved, and the working efficiency is improved.
Furthermore, the sucking disc subassembly includes the solder strip sucking disc that is used for adsorbing the solder strip and the battery piece sucking disc that is used for adsorbing the battery piece.
Further, the laser processing device comprises a motion module for realizing relative motion of the laser processing device and a laser module for realizing laser welding of the laser processing device.
Furthermore, the laser module can move along two directions which form a certain angle with each other relative to the battery component arranged on the processing table; or the battery component placed on the processing table top can move along one direction relative to the laser processing device, and the laser module can move along another direction which forms a certain angle with the one direction relative to the battery component placed on the processing table top.
Further, the directions forming a certain angle with each other are perpendicular to each other; or one direction may be perpendicular to the other at an angle.
Furthermore, the laser module comprises a first visual positioning device and a laser welding head, and the laser welding head can weld the battery pack under the guidance of the first visual positioning device.
Furthermore, the laser processing device also comprises a clamping module used for fixing the laser processing device and the battery component relatively.
Furthermore, the laser welding equipment also comprises a welding strip feeding device and/or a battery piece feeding device.
Further, the solder strip feeding device is provided with a solder strip position adjusting mechanism for adjusting the solder strip feeding posture.
Furthermore, a second visual positioning device is further arranged near the transfer device, the welding strip feeding device and/or the battery piece feeding device, and the second visual positioning device is used for identifying and judging the position of the welding strip and/or the battery piece in the transfer process.
According to another aspect of the present invention, there is provided a solar cell module laser welding method for laser welding a cell module using a solar cell module laser welding apparatus, including the steps of: a bottom layer laying step, namely laying the bottom layer of the battery assembly on the processing table top; a welding strip and/or battery piece transferring step, namely transferring the welding strip and/or battery piece to the bottom layer by using a transferring device; a top layer laying step, wherein the top layer of the battery assembly is laid on the transferred welding strip and the battery piece; and a welding step, wherein the battery pack is integrally welded by using a laser processing device. The top layer and the bottom layer of the battery component are pressed by the EVA films and the glass plates, meanwhile, the laser processing has the characteristics of short heating time, controllable input heat, small heat affected zone and the like, and the problems of bending and hidden cracking of the battery pieces caused by temperature rise in the welding process can be solved.
Further, a pre-welding step of the welding strips and/or the battery pieces is further included after the welding strip and/or battery piece transferring step and before the top layer laying step.
Further, in the step of transferring the welding strips and/or the battery slices, the step of transferring the welding strips and/or the battery slices onto the bottom layer is completed under the guidance of visual positioning.
Further, in the welding step, the laser processing device performs integral welding on the battery assembly under the guidance of visual positioning.
Further, in the welding strip and/or battery piece transferring step, the transferring device simultaneously transfers the welding strips and the battery pieces, and the transferring device places the battery pieces and the welding strips on the bottom layer.
The solar cell module laser welding equipment can be used for welding all the welding strips and the cell pieces integrally, and only the cell pieces and the welding strips need to be moved and carried once, so that the risk of cell piece fragments is reduced.
The laser welding equipment is provided with the sucking disc subassembly, can weld area, battery piece simultaneously and move and carry, has improved work efficiency.
The welding strip positioning mechanism and the vision system ensure that the placing positions of the welding strip and the battery piece on the battery pack and the laser processing position are accurate.
By applying the laser welding method of the battery assembly, the battery pieces and the welding strips are positioned through the pre-welding step, and the top layer and the bottom layer adopt the EVA films and the glass plates to press all the battery pieces, so that the problems of bending and hidden cracking of the battery pieces caused by temperature rise in the welding process are solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic composition diagram of a laser welding apparatus for solar cell modules according to the present invention;
FIG. 2 is a schematic diagram showing the components of a laser processing apparatus for solar cell modules;
fig. 3 shows a schematic composition of a transfer device;
FIG. 4 shows a schematic composition of a solder strip feeding apparatus;
FIG. 5 shows a schematic structural view of the chuck assembly;
fig. 6 shows the battery assembly in the transfer process.
Wherein the figures include the following reference numerals:
1. processing a table top;
2. the device comprises a laser processing device 21, a long axis movement module 22, a first supporting beam 23, a short axis operation module 24, a laser module 25 and a clamping module;
3. the device comprises a transfer device 31, a second supporting beam 32, a fixed base 33, an air channel assembly 34 and a manipulator;
35. the device comprises a sucker component 351, a solder strip sucker 352, a battery piece sucker 353, a connecting part 354, a connecting plate 355 and a guide rail;
4. the welding strip feeding device 41, the welding strip tray assembly 42, the self-weight tensioning assembly 43, the scaling powder coating device 44, the welding strip pressing assembly 45, the cutting and shaping assembly 46, the welding strip temporary storage table 47, the welding strip traction mechanism 48, the mounting base plate 49 and the lower rack;
5. battery piece feedway, 6, second vision positioner, 7, battery pack.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The present invention is described in further detail below with reference to specific examples, which are not to be construed as limiting the scope of the invention as claimed. The term "comprising" when used indicates the presence of a feature but does not preclude the presence or addition of one or more other features; "first," "second," and the like are used to distinguish between different objects and are not limited to a particular order or number.
The solar cell module 7 comprises a plurality of cell pieces and solder strips, and a bottom plate and a top plate which clamp the cell pieces and the solder strips, and the cell pieces and the solder strips are welded by laser welding equipment in the manufacturing process of the solar cell module 7. Among them, the cell is a thin crystal silicon wafer, and when the cell is transferred many times, there is a risk of chipping.
In order to avoid the risk of fragments of the cell pieces during the process of manufacturing the solar cell panel, the invention provides a solar cell module laser welding device capable of integrally welding the cell module 7. The equipment can realize that all the battery pieces and the welding strips can be moved and carried once, and all the welding strips and the battery pieces of the battery assembly 7 can be welded and connected.
As shown in fig. 1, the laser welding apparatus for a solar cell module of the present invention at least includes: a processing table 1 for placing the welded battery assembly 7; the laser processing device 2 of the battery pack 7 is welded, and the processing range of the laser processing device 2 can cover the whole breadth of the battery pack 7; the transfer device 3 for moving the welding strips and/or the battery pieces can move the welding strips and/or the battery pieces to the position of the area of the processing table board 1 where the battery assembly 7 is placed, and the transfer device 3 can directly place all the welding strips and the battery pieces on the battery assembly 7 in sequence. The laser processing device 2 can weld the placed welding strip and the placed battery piece integrally, and in the process, all the battery pieces and the welding strip are only moved once, so that the risk of fragments of the battery pieces is reduced. And the laser processing device 2 integrally welds all welding strips and battery pieces, so that the production process of the battery component 7 is simple and the welding efficiency is high.
Wherein, the area of solar module laser welding equipment processing mesa 1 is greater than the area of battery pack 7, and processing mesa 1 not only can hold battery pack 7, can also bear laser beam machining device 2, move and carry device 3 etc. and processing mesa 1 provides a space basis for the whole welding that can realize battery pack 7.
Fig. 2 shows a laser machining device 2, the laser machining device 2 comprising a movement module, a laser module 24, a first support beam 22. The movement module can be a gantry structure and comprises a long axis movement module 21 and a short axis operation module 23, the short axis operation module 23 is connected with the long axis movement module 21 through a first supporting beam 22, a laser module 24 is fixed on the short axis operation module 23, and under the driving of the long axis movement module 21 and the short axis operation module 23, the laser module 24 and the battery component 7 can move relatively at a certain angle, preferably 90 degrees, and the laser welding operation of all battery pieces and welding strips is realized.
The laser module 24 includes a laser welding head and may also include a first visual positioning device, which may be a separate visual positioning device. The laser welding head can weld the battery pack 7 under the guidance of the first visual positioning device, namely before laser processing at each time, the first visual positioning device positions the battery piece and the welding strip at the processing position and feeds back position data to a laser system, so that the accurate laser processing of the welding strip and the grid line part of the battery piece is ensured.
As another possible embodiment, the laser processing apparatus 2 further includes a clamping module 25. As shown in fig. 1, the clamping module 25 fixes the laser processing device 2 and the battery module 7 relative to each other, and the clamping module 25 clamps the battery module 7. The battery component 7 can be driven to move along the long axis direction under the driving of the long axis movement module 21; the short-axis running module 23 is arranged on the long-axis moving module 21 through the first supporting beam 22, the short-axis running module 23 can drive the laser module 24 to move along the short-axis direction under the driving of the short-axis running module 23, and the laser processing device 2 can realize that the processing range of the laser module 24 covers the whole breadth of the battery component 7 under the action matching of the long-axis moving module 21, the short-axis running module 23 and the clamping module 25.
As one way, the clamping module 25 clamps the battery assembly 7, and the long axis moving module 21 drives the battery assembly 7 to move for a distance along the long axis direction, and then releases the clamping, so as to realize the movement along the long axis direction. The laser module 24 is driven by the short-axis running module 23 to move along the short-axis direction, so that the battery assembly 7 and the laser module 24 mutually move at a certain angle relatively, and the laser welding operation of all battery pieces and welding strips is realized. Of course, the clamping module 25 may be provided separately from the laser processing apparatus 2 to move the battery assembly 7 along the long axis.
Alternatively, the battery assembly 7 is moved in two directions at an angle to each other, and the laser processing device 2 is substantially stationary, so that the laser module 24 processes the entire surface of the battery assembly 7. As a practical matter, the battery assembly 7 can be driven by the movement mechanism to move in two directions at an angle to each other.
Optionally, an auxiliary supporting device capable of making the battery assembly 7 smoother is arranged on the processing table top 1, and the auxiliary supporting device can reduce the friction force of the movement of the battery assembly 7. The auxiliary supporting device may be a roller or an air floating platform, and the auxiliary supporting device makes the battery assembly 7 move more smoothly relative to the processing platform 1. The air floatation platform is arranged, so that the battery assembly 7 is placed more smoothly, and the processing precision is improved.
The transfer device 3 in fig. 1 is fixedly installed on a solar cell module laser welding device, drives a welding strip and/or a cell to transfer, and moves through the laser processing device 2 and the cell module 7 to realize laser processing of the whole breadth of the cell module 7. The battery pack 7 may be fixed and the transfer device 3 may be moved according to actual needs. For example, the fixing base 32 of the transfer device 3 and the clamping module 25 of the laser processing device 2 may be eliminated, and the transfer device 3 and the laser processing device 2 may be connected, so that the transfer device 3 is moved under the driving of the movement module of the laser processing device 2, or a driving device is separately added to the transfer device 3 so that the transfer device 3 can be moved, thereby achieving laser processing of the entire width of the battery assembly 7.
The laser module 24 of the laser processing device 2 and the battery component 7 move relatively, namely the battery component 7 is fixed, and the laser module 24 moves along two directions which form a certain angle with each other; or the battery component 7 moves along one direction, and the laser module 24 moves along the other direction; or the laser module 24 is substantially stationary and the battery assembly 7 is moved in two directions at an angle to each other. The two movement directions of the laser module 24 relative to the battery assembly 7 form a certain angle with each other, which may be perpendicular to each other or substantially perpendicular to each other, and the value of the angle may also be a certain range value, such as 70 ° to 120 °, according to the actual situation, or one of the directions is perpendicular to the other direction forming a certain angle with each other. The relative movement between the laser module 24 and the battery assembly 7 is flexible, and the battery assembly 7 can move in one direction, while the laser module 24 is basically fixed; in the other direction, the laser module 24 is moved and the battery assembly 7 is fixed.
Fig. 3 shows the transfer device 3, and the transfer device 3 includes an air path assembly 33, a robot 34, and a suction cup assembly 35. The air channel assembly 33, the manipulator 34 and the battery piece feeding device 5 may be mounted on the second supporting beam 31 and fixed by the fixing base 32, or may be mounted and fixed in other manners according to actual application conditions. Wherein the movement range of the robot 34 can cover the area of the processing table 1 where the battery assembly 7 is placed. The robot 34 may be a four-axis linkage, or may be a linkage having a range of motion that covers the area of the battery assembly 7. The robot 34 drives the suction cup assembly 35 to place the solder strip and/or the battery piece on the corresponding position of the processing table top 1 of the battery assembly 7 at any angle.
Fig. 4 shows the suction cup assembly 35 in more detail, the suction cup assembly 35 is provided with a solder strip suction cup 351 for sucking a solder strip and a battery plate suction cup 352 for sucking a battery plate, the solder strip suction cup 351 and the battery plate suction cup 352 are connected by a connecting portion 353, a connecting plate 354 is provided between the connecting portion 353 and the solder strip suction cup 351 and/or the battery plate suction cup 352, and a guide rail 355 and a guide rail mounting plate are also provided. The solder strip suction cups 351 and/or the cell plate suction cups 352 can move up and down along the guide rails 355, and a buffer device, such as a tension spring and the like, is arranged between the guide rail mounting plate and the connecting plate 354, so that the pressure on the cell plate is reduced, and the risk of the cell plate being broken is further reduced.
The suction cup assembly 35 can realize independent transfer and/or position correction of the solder strip or the battery piece, or can realize simultaneous transfer and/or position correction of the solder strip and the battery piece. The sucker component 35 simultaneously moves the solder strip and the battery piece, and the working efficiency is improved.
Optionally, the solar cell module laser welding equipment further comprises a solder strip feeding device 4 and/or a cell piece feeding device 5.
Fig. 5 shows the solder strip feeding device 4, and the solder strip feeding device 4 includes a solder strip tray assembly 41, a self-weight tensioning assembly 42, a soldering flux coating device 43, a solder strip pressing assembly 44, a cutting and shaping assembly 45, a solder strip temporary storage table 46, a solder strip pulling mechanism 47, a mounting base plate 48, a lower frame 49, and the like. Unlike the feeding portion of the conventional series welding apparatus, the solder strip temporary storage table 46 is provided with a solder strip position adjusting mechanism that adjusts the solder strip supply posture, and can adjust the position of the solder strip before transfer, ensuring that the solder strip pitch strictly corresponds to the cell grid pitch.
Fig. 3 shows a cell supply device 5, and the cell supply device 5 may be fixed to the transfer device 3 to provide cells for welding.
Optionally, the laser welding equipment for solar cell modules further includes a second visual positioning device 6, as shown in fig. 1, the second visual positioning device 6 is installed near the transfer device 3, the welding strip feeding device 4 and/or the cell piece feeding device 5, and is used for identifying and judging the positions of the welding strips and/or the cells, so that the accuracy of the placement positions of the welding strips and/or the cells in the transfer process is ensured.
The first visual positioning device of the solar cell module laser welding equipment ensures that the laser processing position is accurate, and the second visual positioning device 6 ensures that the placing positions of the welding strip and the cell piece are accurate. Under the condition that the depth of field parameter of the camera of the first visual positioning device is met, the second visual positioning device 6 can be cancelled, and the placing and positioning of the welding strip and the battery piece and the laser processing and positioning can be realized only by the first visual positioning device.
With reference to the laser welding apparatus for solar cell modules, a welding method for laser welding the solar cell module 7 by the laser welding apparatus for solar cell modules will be described below, the welding method including the steps of:
1) bottom layer laying: the bottom layer of the battery assembly 7 is laid on the processing table top 1, and the bottom layer at least comprises a layer of rigid solid material and can also comprise a layer of flexible fixing material. Wherein the rigid solid material is glass, the flexible solid material is EVA (ethylene-vinyl acetate copolymer), and the glass and the EVA are sequentially placed on the laser processing table-board 1.
2) And (3) transferring the welding strip and/or the battery piece: firstly, the manipulator 34 drives the sucker assembly 35 to move to the position above the solder strip temporary storage table 46 of the solder strip feeding device 4 to take out the solder strip; and moving to the position below the second visual positioning device 6 for photographing and positioning, moving to the position of the first battery piece on the battery component 7, and putting down the welding strip after adjusting the position of the welding strip by the manipulator 34 to complete the placement of the first group of welding strips. Then, the manipulator 34 drives the sucker assembly 35 to move to the position above the battery piece feeding device 5 to take the battery piece, and simultaneously moves to the position above the solder strip temporary storage table 46 to take the solder strip; the manipulator 34 moves below the second visual positioning device 6, and after stopping, the welding strip and the battery piece are respectively photographed and positioned to perform position identification and judgment; and then moving to the position above the first group of solder strips, putting down the first battery piece after adjusting the position, adjusting the position of the solder strips after rotating the sucker assembly 35 by 180 degrees, and putting down the second group of solder strips. The second group of welding strips are Z-shaped welding strips, one end of each welding strip is placed above the first battery piece, and the other end of each welding strip extends to the position below the second battery piece to be placed, so that the welding strips and the battery pieces are sequentially connected in series. The above is a transfer process of a group of solder strips and battery pieces, the transfer device 3 simultaneously transfers the solder strips and/or battery pieces, and transfers the solder strips and/or battery pieces onto the bottom layer under the guidance of visual positioning. Fig. 6 shows the battery assembly in the transfer process. The battery assembly comprises a plurality of groups of welding strips and battery pieces, and in the step of transferring the welding strips and/or the battery pieces, the following groups of welding strips and battery pieces are transferred by referring to the transferring process.
3) A top layer laying step: the top layer is laid on the battery assembly 7 after the transfer and the pre-welding are completed. The top layer comprises at least one layer of a rigid solid material and further comprises a layer of a flexible fastening material. Wherein the rigid solid material is glass, and the flexible solid material is EVA. The EVA and the glass are placed on the solar cell module 7 in this order.
4) A welding step: the battery pack 7 is integrally welded under visual alignment guidance using the laser processing apparatus 2. Specifically, through the cooperation of the long axis movement module 21, the short axis movement module 23 and the clamping module 25, the laser module 24 moves to the upper part of each battery piece in sequence, and the EVA film and the glass plate are penetrated to perform photographing positioning and laser welding operation, so that the whole welding operation of the battery assembly 7 is completed. To achieve the positioning and laser welding operation of the above process, the top layer should be a transparent layer, capable of transmitting light, e.g., transparent glass and EVA film.
In the steps, the EVA film and the glass plate press all the battery pieces, and meanwhile, the laser processing has the characteristics of short heating time, controllable input heat, small heat affected zone and the like, so that the problems of bending and hidden cracking of the battery pieces caused by temperature rise in the welding process can be solved.
Optionally, a pre-welding step of the solder strip and/or the battery piece is further included after the solder strip and/or the battery piece transferring step and before the top layer laying step. Firstly, the manipulator 34 drives the sucker assembly 35 to move to the position above the solder strip temporary storage table 46 to take out the solder strip; and moving to the position below the second visual positioning device 6 for photographing and positioning, moving to the position of the first battery piece on the battery component 7, and putting down the welding strip after adjusting the position of the welding strip by the manipulator 34 to complete the placement of the first group of welding strips. Secondly, the mechanical arm 34 drives the sucker assembly 35 to move to the position above the battery sheet box to take the battery sheet, and simultaneously moves to the position above the welding strip temporary storage table 46 to take the welding strip; moving to the lower part of the second visual positioning device 6, and respectively photographing and positioning the welding strip and the battery piece; and moving to the position above the first group of welding strips, putting down the first battery piece after position adjustment, adjusting the position of the welding strips after the sucker assembly 35 rotates by 180 degrees, and putting down the second group of welding strips. Then, laser module 24 moves to the welding strip and the battery piece top of just putting, and the first vision positioner in laser module 24 confirms to welding the position of taking a picture of area, battery piece, and laser carries out spot welding through the process hole on sucking disc subassembly 35 to welding the area, battery piece, keeps welding the position of taking a picture and battery piece fixed.
After the pre-welding of one group of battery pieces and the welding strips is finished, the clamping module 25 clamps the battery assembly 7, and drives the battery assembly 7 to move forward by the distance of one battery piece under the driving of the long shaft moving module 21 to prepare for the pre-welding operation of the next group of welding strips and battery pieces; alternatively, the laser module 24 is moved forward along the battery assembly 7 by a distance of one battery piece by the long axis moving module 21, and is ready for performing a pre-welding operation of a next set of solder strips and battery pieces.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the laser welding equipment for the solar cell module realizes that the times of cell piece transferring and stress are less in the welding process of the cell module 7, and reduces fragments of the cell pieces caused by repeated transferring; the welding strip and the battery piece are placed on the battery component 7 and then integrally welded, so that the operation process is simple and the production efficiency is high; the sucker assembly 35 is designed, so that the welding strip and the battery piece can be moved and loaded at the same time, and the working efficiency is improved; a welding strip positioning mechanism and a visual system are designed to ensure that the placing positions of the welding strip and the battery piece on the battery component 7 and the laser processing position are accurate; a welding strip position adjusting mechanism is designed to adjust the spacing between welding strips and ensure that the placing position of the welding strips corresponds to the grid line position of the battery piece; when the battery component 7 is integrally welded, the EVA film and the glass plate press all the battery pieces, so that the bending and hidden cracking of the battery pieces caused by heating can be reduced.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (21)
1. A solar cell module laser welding apparatus, comprising: a processing table top (1), wherein the processing table top (1) can be used for placing a welded battery component (7); a transfer device (3), wherein the transfer device (3) can move the welding strips and/or the battery pieces in the battery assembly (7) to the position of the area on the processing table top (1) where the battery assembly (7) is placed; the laser processing device (2) can weld the battery pack (7), and the processing range of the laser processing device (2) can cover the whole breadth of the battery pack (7).
2. The laser welding apparatus for solar cell modules according to claim 1, characterized in that an auxiliary support device is arranged on the processing table (1), and the auxiliary support device can reduce the friction force of the movement of the cell module (7).
3. The laser welding apparatus for solar cell modules according to claim 2, wherein the auxiliary supporting device is a roller or an air floating platform.
4. The solar cell module laser welding apparatus according to claim 1, wherein the transfer device (3) includes a robot (34), and a moving range of the robot (34) is capable of covering an area of the processing table (1) where the cell module (7) is placed.
5. The solar cell module laser welding apparatus according to claim 4, wherein the robot (34) is a four-axis linkage.
6. The laser welding equipment for solar cell modules as claimed in claim 4, wherein the transfer device (3) further comprises a suction cup assembly (35), and the robot (34) drives the suction cup assembly (35) to place the solder strip and/or the cell slice on the position of the processing table (1) corresponding to the cell module (7) at any angle.
7. The laser welding apparatus for solar cell modules according to claim 6, wherein the suction cup assembly (35) is capable of transferring the solder ribbon or the cell sheet individually or simultaneously.
8. The solar cell module laser welding apparatus according to claim 7, wherein the suction cup module (35) includes a solder ribbon suction cup (351) for sucking the solder ribbon and a cell suction cup (352) for sucking the cell.
9. The laser welding apparatus for solar modules according to claim 1, characterized in that the laser machining device (2) comprises a movement module for effecting the relative movement thereof and a laser module (24) for effecting the laser welding thereof.
10. The solar module laser welding apparatus according to claim 9, characterized in that the laser module (24) is movable in two mutually angled directions relative to the cell module (7) placed on the processing table (1); or the battery component (7) placed on the processing table top (1) can move along one direction relative to the laser module (24), and the laser processing device (2) can move along another direction which forms a certain angle with the one direction relative to the battery component (7) placed on the processing table top (1).
11. The laser welding apparatus for solar cell modules according to claim 10, wherein the directions at an angle to each other are perpendicular to each other; or the one direction and the other direction at an angle are perpendicular to each other.
12. The laser welding apparatus for solar modules according to claim 9, characterized in that the laser module (24) comprises a first visual positioning device and a laser welding head, the laser welding head being capable of welding the solar module (7) under the guidance of the first visual positioning device.
13. The solar module laser welding apparatus according to any one of claims 1-12, wherein the laser machining device (2) further comprises a clamping module (25) for fixing the laser machining device (2) relative to the cell module (7).
14. The laser welding apparatus for solar cell modules according to any one of claims 1 to 12, characterized in that it further comprises a ribbon feeding device (4) and/or a cell sheet feeding device (5).
15. The solar cell module laser welding apparatus according to claim 14, wherein the solder ribbon feeding device (4) is provided with a solder ribbon position adjusting mechanism for adjusting a solder ribbon feeding posture.
16. The laser welding equipment for solar cell modules according to claim 14, further comprising a second visual positioning device (6) near the transfer device (3), the solder strip feeding device (4) and/or the cell slice feeding device (5), wherein the second visual positioning device (6) is used for identifying and judging the position of the solder strip and/or the cell slice during the transfer process.
17. A laser welding method for solar cell modules, characterized in that a solar cell module (7) is laser welded using the laser welding apparatus for solar cell modules according to any one of claims 1 to 16, comprising the steps of:
a bottom layer laying step, wherein the bottom layer of the battery component (7) is laid on the processing table top (1);
a welding strip and/or battery piece transferring step, wherein the welding strip and/or the battery piece are transferred to the bottom layer by using the transferring device (3);
a top layer laying step of laying the top layer of the battery assembly (7) on the transferred welding strip and the battery piece; and a welding step of integrally welding the battery assembly (7) by using the laser processing device (2).
18. The laser welding method for solar cell modules according to claim 17, further comprising a pre-welding step of the solder strip and/or the cell slice after the step of transferring the solder strip and/or the cell slice and before the step of laying the top layer.
19. The laser welding method for solar cell modules according to claim 17, wherein the transferring of the solder ribbon and/or the cell sheet onto the base layer in the solder ribbon and/or cell sheet transferring step is performed under visual alignment guidance.
20. The laser welding method for solar cell modules according to claim 17, wherein in the welding step, the laser processing device (2) performs the integral welding of the cell module (7) under visual positioning guidance.
21. The laser welding method for solar cell modules according to claim 17, wherein in the step of transferring the solder ribbon and/or the cell sheet, the transfer device (3) simultaneously transfers the solder ribbon and the cell sheet, and the transfer device (3) places the cell sheet and the solder ribbon on the base layer.
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Address after: No. 88 Jiulonghu Street, Donghu New Technology Development Zone, Wuhan City, Hubei Province, 430078 Applicant after: WUHAN DR LASER TECHNOLOGY Co.,Ltd. Applicant after: Dier Laser Technology (Wuxi) Co.,Ltd. Address before: No.5, 2nd huashiyuan Road, Donghu New Technology Development Zone, Wuhan, Hubei 430222 Applicant before: WUHAN DR LASER TECHNOLOGY Co.,Ltd. Applicant before: Dier Laser Technology (Wuxi) Co.,Ltd. |
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