Busbar-less solar cell wire welding device

Abstract

The present invention relates to a welding wire device for a solar cell without a main grid, comprising: a machine base, a welding mesh wiring board is provided on the machine base, longitudinal wire grooves and transverse wire grooves arranged in a vertical and horizontal cross arrangement are provided on the welding mesh wiring board, and the intersection of the longitudinal wire grooves and the transverse wire grooves is a cross welding point; a longitudinal wiring mechanism, the longitudinal wiring mechanism is used to arrange the welding wire in the longitudinal wire groove; a transverse wiring mechanism, the transverse wiring mechanism is used to arrange the welding wire in the transverse wire groove; a multi-head welding device, the multi-head welding device is located above the welding mesh wiring board, and the multi-head welding device is provided with a welding wire cross welding head matching the cross welding point, which is used to weld the vertical and horizontal cross welding wires into a welding mesh. The present invention adopts a pre-compiled welding mesh, and then the entire welding mesh is laid out before welding, which not only improves the efficiency of welding the battery cell, but also reduces the exposure of the battery cell, better guarantees the welding quality of the battery cell, and improves the conversion efficiency of the battery cell.

Description

Technical Field

[0001] The invention belongs to the technical field of automated manufacturing equipment, and in particular relates to a welding wire device for a solar cell sheet without a main grid. Background Art

[0002] Solar energy is a new type of energy that is pollution-free, has no regional restrictions, and is inexhaustible. Using solar energy to generate electricity has become a major trend, and how to improve the conversion efficiency of battery cell modules has also become the main direction of developing solar energy. Now there is a main grid-free anti-hidden crack battery group in the industry (such as a utility model patent for a main grid-free anti-hidden crack battery module, application number 201620971285.8). Compared with traditional cell groups, it has the advantages of low component loss and anti-hidden cracking, and will become a development trend of solar modules in the future. Because of this type of cell group, a new welding process is required, but the string welding machines on the market can no longer meet the requirements of welding quality and welding efficiency of the cell group, so it is urgent to develop a new equipment to achieve welding of the cell.

[0003] Reference patent documents:

[0004] Solar cell welding machine, application number: CN201910102605.4;

[0005] Solar cell welding machine, application number: CN201910101044.6;

[0006] Welding ribbon detection system and solar cell welding machine, CN201910508427.5;

[0007] Welding ribbon quick-change device and solar cell welding machine, application number: CN201910459737.2

[0008] Typesetting mechanism and solar cell welding machine, application number: CN201910103376.8;

[0009] Convergence welding device and solar cell welding machine, application number: CN201910103142.3;

[0010] Solar cell welding ribbon laying mechanism and solar cell welding machine, application number: CN201910103144.2;

[0011] Battery cell box loading and unloading device and solar cell welding machine, application number: CN201910103143.8;

[0012] Defective product marking system and solar cell welding machine, application number: CN201910153811.8;

[0013] Transmission mechanism of solar cell and solar cell welding machine, application number: CN201910103377.2;

[0014] Cell unloading device and solar cell welding machine, application number: CN201910103145.7;

[0015] Transmission welding table device and solar cell welding machine, application number: CN201910103141.9;

[0016] Flux cleaning device and solar cell sheet welding machine, application number: CN201910644228.7;

[0017] Glass inkjet printing mechanism and solar cell welding machine, application number: CN201910153812.2;

[0018] AI intelligent process anomaly identification and processing system and solar cell welding machine, application number: CN201910153769.X. Summary of the invention

[0019] The object of the present invention is to provide a main grid-free solar cell welding wire device. Compared with the traditional welding method using pulled welding wire, the present invention uses a pre-compiled welding mesh and then lays the entire welding mesh before welding, which not only improves the efficiency of welding solar cells, but also reduces the whitening of solar cells, better ensures the welding quality of solar cells, and improves the conversion efficiency of solar cells.

[0020] To achieve the above object, the technical solution adopted by the present invention is:

[0021] A busbar-free solar cell sheet welding wire welding device, characterized by comprising:

[0022] A machine base 100, on which a welding mesh wiring board 200 is disposed, on which longitudinal wire grooves 211 and transverse wire grooves 210 arranged in a vertical and horizontal cross pattern are disposed, and the intersection of the longitudinal wire grooves 211 and the transverse wire grooves 210 is a cross welding point 212;

[0023] A longitudinal wiring mechanism 500, the longitudinal wiring mechanism 500 is used to arrange the welding wire in the longitudinal wire groove 211;

[0024] A transverse wiring mechanism 400, the transverse wiring mechanism 400 is used to arrange welding wires in the transverse wire duct 210;

[0025] A multi-head welding device 300 is located above the welding mesh wiring board 200. The multi-head welding device 300 is provided with a welding wire cross welding head 310 matching the cross welding point 212, which is used to weld the cross welding wires into a welding mesh.

[0026] Furthermore, the transverse wiring mechanism 400 includes a transverse wire pay-off bracket 410, on which a transverse wire pay-off reel 420 and a transverse wire pay-off direction-changing wheel 430 are provided; it also includes a transverse welding wire cutting mechanism 470, a welding wire pressing mechanism 471 and a transverse wire pulling manipulator 460, on which a transverse wire pulling manipulator 460 is provided with a transverse wire pulling clamp 450; the welding wire is wound around the transverse welding wire pay-off reel 420, and the welding wire passes through the transverse wire pay-off direction-changing wheel 430, the welding wire pressing mechanism 471 and the transverse welding wire cutting mechanism 470 in sequence, and then is pulled through the welding mesh wiring board 200 by the transverse wire pulling clamp 450 and placed in the transverse wire groove 210.

[0027] Furthermore, the transverse wiring mechanism 400 also includes a flux box 480, and the flux box 480 contains flux; the welding wire first passes through the flux box 480 to be coated with a layer of flux, and then passes through the welding wire clamping mechanism 471 and the transverse welding wire cutting mechanism 470 in sequence.

[0028] Furthermore, the transverse welding wire cutting mechanism 470 includes a cutting mechanism bracket 472, on which an upper cutter 473 and a lower cutter 474 are installed. The upper cutter 473 and the lower cutter 474 are driven by an upper cutter driving cylinder 475 and a lower cutter driving cylinder 476 to move in opposite directions to shear the welding wire.

[0029] Furthermore, a guide fork 477 for guiding the welding wire is provided at the front side of the transverse welding wire cutting mechanism 470 .

[0030] Furthermore, the transverse wire-laying support 410 is also provided with a transverse welding wire butt-jointing mechanism 440 for butt-jointing the ends of two welding wires.

[0031] Furthermore, the transverse welding wire docking mechanism 440 includes a docking mechanism bracket 441 installed on the transverse wire-releasing bracket 410, and a wire-passing plate 442 is provided on the docking mechanism bracket 441, and a wire-passing groove 446 for the welding wire to pass through is provided on the wire-passing plate 442 along the welding wire direction, and a docking position 447 is provided on the wire-passing groove 446; a pair of lifting drive cylinders 445 are provided on the docking mechanism bracket 441, and a pressure rod 443 is mounted on the pair of lifting drive cylinders 445, and the pressure rod 443 is located above the wire-passing plate 442, and a welding wire pressure head 448 matching the docking position 447 is provided on the lower surface of the pressure rod 443.

[0032] Furthermore, a wire wheel 444 for pressing the welding wire into the wire passing groove 446 is provided at the front and rear of the wire passing plate 442 .

[0033] Furthermore, the longitudinal wiring mechanism 500 includes a longitudinal wire pay-off bracket 501, a welding wire pressing mechanism 471, a longitudinal welding wire cutting mechanism 507 and a longitudinal wire pulling manipulator 506; the longitudinal wire pay-off bracket 501 is provided with a longitudinal welding wire pay-off reel 502 and a longitudinal wire pay-off changing wheel 503, and the longitudinal wire pulling manipulator 506 is provided with a longitudinal wire pulling clamp 505; the longitudinal wiring mechanism 500 has the same layout form and action process as the transverse wiring mechanism 400, and the wiring direction of the longitudinal wiring mechanism 500 is perpendicular to that of the transverse wiring mechanism 400.

[0034] Furthermore, the multi-head welding device 300 is a spot welding machine, and a mounting frame 320 is provided at the bottom thereof. The mounting frame 320 is directly connected to the spot welding machine through a downward pressure cylinder 330, and a welding wire cross welding head 310 matching the cross welding point 212 is provided on the lower surface of the mounting frame 320.

[0035] Furthermore, an elastic connector is provided between the welding wire cross welding head 310 and the mounting bracket 320 .

[0036] The beneficial effects of the present invention are as follows: compared with the traditional welding method using pulled welding wire, the present invention uses a pre-compiled welding mesh, and then lays the entire welding mesh before welding, which not only improves the efficiency of welding battery cells, but also reduces the whitening of battery cells, better ensures the welding quality of battery cells, and improves the conversion efficiency of battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 1 is an overall schematic diagram of a busbar-less solar cell sheet welding wire welding device in an embodiment.

[0038] Figure 2 2 is a schematic plan view of a welding mesh wiring board in an embodiment.

[0039] Figure 3 2 is a three-dimensional schematic diagram of a multi-head welding device in an embodiment.

[0040] Figure 4 Schematic diagram of the horizontal wiring mechanism in the embodiment.

[0041] Figure 5 Schematic diagram of the transverse wire drawing clamp in the embodiment.

[0042] Figure 6 Schematic diagram of the transverse welding wire butt joint mechanism in the embodiment Figure 1 .

[0043] Figure 7Schematic diagram of the transverse welding wire butt joint mechanism in the embodiment Figure 2 .

[0044] Figure 8 Schematic diagram of the pressure rod in the embodiment.

[0045] Fig. 9 This is a partial schematic diagram of the transverse welding wire butt joint mechanism in the embodiment. Figure 1 .

[0046] Fig.10 This is a partial schematic diagram of the transverse welding wire butt joint mechanism in the embodiment. Figure 2 .

[0047] Fig.11 Schematic diagram of the longitudinal wiring mechanism in the embodiment.

[0048] In the figure: 100- base;

[0049] 200-welding mesh wiring board, 210-transverse wire trough, 211-longitudinal wire trough, 212-cross solder joint;

[0050] 300-multi-head welding device, 310-cross-wire welding head, 320-mounting frame, 330-down-pressure cylinder;

[0051] 400- transverse wiring mechanism, 410- transverse wire pay-off bracket, 420- transverse welding wire pay-off reel, 430- transverse wire pay-off direction-changing wheel, 440- transverse welding wire docking mechanism, 441- docking mechanism bracket, 442- wire-passing plate, 443- pressure rod, 444- wire wheel, 445- lifting drive cylinder, 446- wire-passing slot, 447- docking position, 448- welding wire pressure head, 450- transverse wire pulling clamp, 460- transverse wire pulling manipulator, 461- rotating shaft, 462- connecting rod, 463- rotating drive cylinder, 470- transverse welding wire cutting mechanism, 471- welding wire pressing mechanism, 472- cutting mechanism bracket, 473- upper cutter, 474- lower cutter, 475- upper cutter drive cylinder, 476- lower cutter drive cylinder, 477- guide fork, 480- flux box;

[0052] 500-longitudinal wiring mechanism, 501-longitudinal wire pay-off bracket, 502-longitudinal welding wire pay-off reel, 503-longitudinal wire pay-off changing wheel, 504-longitudinal welding wire docking mechanism, 505-longitudinal wire pulling clamp, 506-longitudinal wire pulling manipulator, 507-longitudinal welding wire cutting mechanism. DETAILED DESCRIPTION

[0053] In order to better understand the present invention, the technical solution of the present invention is further described below in conjunction with embodiments and drawings.

[0054] like Figure 1As shown, a busbar-free solar cell sheet welding wire welding device comprises:

[0055] like Figure 1 , 2 As shown, the machine base 100 is provided with a welding mesh wiring board 200 , and the welding mesh wiring board 200 is provided with longitudinal wire grooves 211 and transverse wire grooves 210 arranged in a vertical and horizontal cross pattern, and the intersection of the longitudinal wire grooves 211 and the transverse wire grooves 210 is a cross welding point 212 .

[0056] like Figure 4 , 11 As shown, the longitudinal wiring mechanism 500 is used to arrange welding wires (such as round, flat, and triangular copper wires) in the longitudinal wire groove 211; the transverse wiring mechanism 400 is used to arrange welding wires in the transverse wire groove 210. The structure, arrangement, and operation process of the longitudinal wiring mechanism 500 and the transverse wiring mechanism 400 are basically the same; the difference is that the wiring direction of the longitudinal wiring mechanism 500 is perpendicular to that of the transverse wiring mechanism 400, and adaptive adjustment is made according to the number and spacing of welding wires. The following focuses on the transverse wiring mechanism 400 to explain the details.

[0057] like Figure 4 As shown, the transverse wiring mechanism 400 includes a transverse wire pay-off bracket 410, on which a transverse wire pay-off reel 420 and a transverse wire pay-off direction-changing wheel 430 are provided; it also includes a transverse wire cutting mechanism 470, a wire pressing mechanism 471 and a transverse wire pulling manipulator 460, on which a transverse wire pulling manipulator 460 is provided a transverse wire pulling clamp 450; the welding wire is wound around the transverse wire pay-off reel 420, and the welding wire passes through the transverse wire pay-off direction-changing wheel 430, the welding wire pressing mechanism 471 and the transverse welding wire cutting mechanism 470 in sequence, and then is pulled by the transverse wire pulling clamp 450 through the welding mesh wiring board 200 and placed in the transverse wire groove 210.

[0058] like Figure 4 As shown, the horizontal wire pulling robot 460 is a linear module, which only needs to provide one-dimensional operation according to the needs, which is more cost-effective. One dimension can also be added according to the needs, such as Figure 5As shown, a rotating shaft 461 is added to the linear module, and a corresponding number and position of horizontal wire pulling clamps 450 are set on the rotating shaft 461 according to the number and spacing of wiring. One end of the rotating shaft 461 is fixedly connected to a connecting rod 462, and the other end of the connecting rod 462 is hinged to the output end of a rotating drive cylinder 463. The connecting rod 462 is driven to rotate by the rotating drive cylinder 463 to increase the dimension. The longitudinal wire pulling manipulator 506 can also be made in the same form. In order to avoid mutual interference between the longitudinal wire pulling manipulator 506 and the horizontal wire pulling manipulator 460, the longitudinal wire pulling manipulator 506 and the horizontal wire pulling manipulator 460 can be respectively set above and below the machine base 100.

[0059] like Fig.11 As shown, the longitudinal wiring mechanism 500 includes a longitudinal wire pay-off bracket 501, a welding wire pressing mechanism 471, a longitudinal welding wire cutting mechanism 507 and a longitudinal wire pulling manipulator 506, the longitudinal wire pay-off bracket 501 is provided with a longitudinal welding wire pay-off reel 502 and a longitudinal wire pay-off changing wheel 503, and the longitudinal wire pulling manipulator 506 is provided with a longitudinal wire pulling clamp 505; the longitudinal wiring mechanism 500 has the same layout form and action process as the transverse wiring mechanism 400, and the wiring direction of the longitudinal wiring mechanism 500 is perpendicular to that of the transverse wiring mechanism 400.

[0060] like Fig. 9 As shown, the transverse wiring mechanism 400 also includes a flux box 480, and the flux box 480 contains flux; the welding wire first passes through the flux box 480 to be coated with a layer of flux, and then passes through the welding wire pressing mechanism 471 and the transverse welding wire cutting mechanism 470 in sequence.

[0061] like Fig. 9 , 10 As shown, the transverse welding wire cutting mechanism 470 includes a cutting mechanism bracket 472, on which an upper cutter 473 and a lower cutter 474 are mounted. The upper cutter 473 and the lower cutter 474 are driven to move in opposite directions by an upper cutter driving cylinder 475 and a lower cutter driving cylinder 476, respectively, to shear the welding wire. A guide fork 477 for guiding the welding wire is also provided at the front side of the transverse welding wire cutting mechanism 470.

[0062] like Figure 4 As shown, the horizontal wire-laying support 410 is also provided with a horizontal wire-jointing mechanism 440 for joining the ends of the new and old wires when the wires are used up (the longitudinal wiring mechanism 500 is also provided with a corresponding wire-jointing mechanism, as shown in FIG. Fig.11As shown), a copper wire cold welding machine can be used. The horizontal welding wire docking mechanism 440 includes a docking mechanism bracket 441 installed on the horizontal wire-releasing bracket 410, and a wire-passing plate 442 is provided on the docking mechanism bracket 441. A wire-passing groove 446 for the welding wire to pass through is provided on the wire-passing plate 442 along the welding wire direction, and a docking position 447 is provided on the wire-passing groove 446; a pair of lifting drive cylinders 445 are provided on the docking mechanism bracket 441, and a pressure rod 443 is mounted on the pair of lifting drive cylinders 445. The pressure rod 443 is located above the wire-passing plate 442, and a welding wire pressing head 448 matching the docking position 447 is provided on the lower surface of the pressure rod 443. When the copper wire is butt-welded, the copper wire pressing head 448 is used to press the copper wire, and then manual welding is adopted. A wire wheel 444 for pressing the copper wire in the wire-passing groove 446 is provided at the front and rear of the wire-passing plate 442.

[0063] like Figure 3 As shown, a multi-head welding device 300 is located above the welding mesh wiring board 200. The multi-head welding device 300 is provided with a cross welding head 310 of welding wires matching the cross welding points 212 (quantity and position), which is used to weld the cross welding wires into a welding mesh. The multi-head welding device 300 is a spot welding machine, and a mounting frame 320 is provided at the bottom thereof. The mounting frame 320 is directly connected to the spot welding machine through a downward pressure cylinder 330, and a cross welding head 310 of welding wires matching the cross welding points 212 is provided on the lower surface of the mounting frame 320. An elastic connecting member (such as a spring, etc.) is provided between the cross welding head 310 of welding wires and the mounting frame 320, so that each cross welding head 310 of welding wires can tightly press the welding wire.

[0064] The mesh welding process of this embodiment:

[0065] (1) First, the longitudinal wiring mechanism 500 is used to arrange the longitudinal welding wires in the longitudinal wire grooves 211 of the welding mesh wiring board 200.

[0066] (2) The transverse welding wire is arranged in the transverse wire groove 210 of the welding mesh wiring board 200 by using a transverse wiring mechanism. The transverse welding wire is coated with a layer of flux after passing through the flux box 480 to facilitate subsequent welding.

[0067] (3) The welding wire is cut by the transverse welding wire cutting mechanism 470 and the longitudinal welding wire cutting mechanism 507, and then the longitudinal welding wire and the transverse welding wire are welded by the multi-head welding device 300 to form an independent welding mesh.

[0068] (4) Finally, the welding mesh and the main grid-free solar cell are welded into a solar cell panel by a spot welding machine.

[0069] The above description is only an application embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the protection scope of the present invention.

Claims

1. A busbar-less solar cell welding wire welding device, characterized in that: include: A machine base (100), wherein a welding mesh wiring board (200) is provided on the machine base (100), and longitudinal wire grooves (211) and transverse wire grooves (210) arranged in a cross-arranged manner are provided on the welding mesh wiring board (200), and the intersection of the longitudinal wire grooves (211) and the transverse wire grooves (210) is a cross welding point (212); A longitudinal wiring mechanism (500), the longitudinal wiring mechanism (500) being used to arrange welding wires in the longitudinal wire groove (211); A transverse wiring mechanism (400), the transverse wiring mechanism (400) being used to arrange welding wires in the transverse wire duct (210); The transverse wiring mechanism (400) comprises a transverse wire-paying support (410), on which a transverse wire-paying reel (420) and a transverse wire-paying direction-changing wheel (430) are provided; it also comprises a transverse wire-cutting mechanism (470), a wire-pressing mechanism (471) and a transverse wire-pulling manipulator (460), on which a transverse wire-pulling clamp (450) is provided; welding wire is wound around the transverse wire-paying reel (420), the welding wire passes through the transverse wire-paying direction-changing wheel (430), the wire-pressing mechanism (471) and the transverse wire-cutting mechanism (470), and then is pulled by the transverse wire-pulling clamp (450) through the welding mesh wiring board (200) and placed in the transverse wire slot (210); The transverse wire-paying support (410) is also provided with a transverse welding wire docking mechanism (440) for docking the ends of the new welding wire and the old welding wire when the welding wire is used up; The horizontal welding wire docking mechanism (440) comprises a docking mechanism bracket (441) mounted on a horizontal wire-releasing bracket (410), a wire-passing plate (442) being provided on the docking mechanism bracket (441), a wire-passing groove (446) for the welding wire to pass through being provided on the wire-passing plate (442) along the welding wire direction, and a docking position (447) being provided on the wire-passing groove (446); a pair of lifting drive cylinders (445) being provided on the docking mechanism bracket (441), a pressing rod (443) being mounted on the pair of lifting drive cylinders (445), the pressing rod (443) being located above the wire-passing plate (442), and a welding wire pressing head (448) matching the docking position (447) being provided on the lower surface of the pressing rod (443); wire guide wheels (444) for pressing the welding wire into the wire-passing groove (446) are provided at the front and rear sides of the wire-passing plate (442); The transverse wiring mechanism (400) further comprises a soldering flux box (480), wherein the soldering flux box (480) contains soldering flux; the soldering wire first passes through the soldering flux box (480) to be coated with a layer of soldering flux, and then passes through the soldering wire pressing mechanism (471) and the transverse soldering wire cutting mechanism (470) in sequence; The longitudinal wiring mechanism (500) and the transverse wiring mechanism (400) have the same arrangement form and operation process, and the wiring directions of the longitudinal wiring mechanism (500) and the transverse wiring mechanism (400) are perpendicular; A multi-head welding device (300) is located above a welding mesh wiring board (200), and is provided with welding wire cross welding heads (310) matching the cross welding points (212) for welding cross welding wires into a welding mesh.

2. The busbar-free solar cell welding wire welding device according to claim 1, characterized in that: The transverse welding wire cutting mechanism (470) comprises a cutting mechanism bracket (472), an upper cutting knife (473) and a lower cutting knife (474) are mounted on the cutting mechanism bracket (472), and the upper cutting knife (473) and the lower cutting knife (474) are driven to move in opposite directions by an upper cutting knife driving cylinder (475) and a lower cutting knife driving cylinder (476) respectively to shear the welding wire.

3. The busbar-free solar cell welding wire welding device according to claim 1, characterized in that: A guide fork (477) for guiding the welding wire is also provided on the front side of the transverse welding wire cutting mechanism (470).

4. The busbar-free solar cell welding wire welding device according to any one of claims 1 to 3, characterized in that: The longitudinal wiring mechanism (500) comprises a longitudinal wire-paying support (501), a welding wire pressing mechanism, a longitudinal welding wire cutting mechanism (507) and a longitudinal wire-pulling manipulator (506); the longitudinal wire-paying support (501) is provided with a longitudinal welding wire-paying reel (502) and a longitudinal wire-paying direction-changing wheel (503); the longitudinal wire-pulling manipulator (506) is provided with a longitudinal wire-pulling clamp (505); the longitudinal wiring mechanism (500) and the transverse wiring mechanism (400) have the same arrangement form and action process; the wiring directions of the longitudinal wiring mechanism (500) and the transverse wiring mechanism (400) are perpendicular.

5. The busbar-less solar cell welding wire welding device according to claim 1, characterized in that: The multi-head welding device (300) is a spot welding machine, a mounting frame (320) is provided at its lower portion, the mounting frame (320) is directly connected to the spot welding machine via a downward pressure cylinder (330), and a welding wire cross welding head (310) matching the cross welding point (212) is provided on the lower surface of the mounting frame (320).

6. The busbar-less solar cell welding wire welding device according to claim 5, characterized in that: An elastic connection piece is provided between the welding wire cross welding head (310) and the mounting frame (320).

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