Main-grid-free battery piece series welding production line and production method

Abstract

The invention relates to a main-grid-free battery piece series welding production line and a production method. The main-grid-free battery piece series welding production line comprises a rack, and a series welding machine device, a first silk-screen printing device, a battery string segmentation device and a second silk-screen printing device which are sequentially arranged on the rack in the machining direction of battery pieces; the first longitudinal transmission line is connected with the tail end of the series welding machine equipment and the front end of the first silk-screen printing equipment; the battery string segmentation device further comprises a second longitudinal transmission line, the second longitudinal transmission line is located on one side of the tail end of the battery string segmentation device, and a battery string turnover device is further arranged at the upper end of the second longitudinal transmission line. The third longitudinal transmission line is positioned on one side of the front end of the second silk-screen printing equipment; the device further comprises a transverse transfer mechanism used for transferring the overturned battery strings to the third longitudinal transmission line, and the device has the advantages that the binding force of the welding strips and the battery pieces is increased, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell production equipment, and in particular to a busbar-free battery cell string welding production line and a production method. Background Art

[0002] With the rapid development of the photovoltaic industry, various manufacturers are exploring ways to reduce costs and increase efficiency. As a result, a busbar-free cell has emerged. This type of busbar-free cell has only thin grid lines on its surface, and no busbar lines are set on the front and back. This can increase the effective photoelectric conversion area, reduce the loss of silver paste, and achieve the purpose of reducing costs and increasing efficiency. In the prior art, there are several processes for preparing such busbar-free cells into strings:

[0003] 1. Coating solution: Copper wire composite film or skin film is covered on the battery cell, and then laminated to alloy the welding strip with the battery cell.

[0004] 2. Glue dispensing solution: First apply glue dots on the battery cell, use UV lamp to glue and solidify the entire solder strip on the battery cell, and then laminate to achieve alloying of the solder strip and the battery cell.

[0005] Among them, the laminating solution completes the bonding of the soldering tape and the battery cell in the form of a film, which will increase the cost of the film, and poor EL can only be judged after lamination, which will also bring problems such as cost increase and optical obstruction; while the glue dispensing solution requires the addition of a skin film, and there will be a shadow under the soldering tape during EL detection, and the bonding strength between the soldering tape and the battery cell is insufficient.

[0006] Therefore, it is urgent for those skilled in the art to provide a busbar-free battery cell string welding production line and production method to increase the bonding strength between the welding ribbon and the battery cell and reduce the cost. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the defects in the prior art, thereby providing a busbar-free battery cell string welding production line and a production method.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] A busbar-free battery cell string welding production line comprises a frame, and a string welding device, a first screen printing device, a battery string segmenting device and a second screen printing device which are sequentially arranged on the frame along a battery cell processing direction;

[0010] Also included is a first longitudinal transmission line, the first longitudinal transmission line connecting the end of the stringer device and the front end of the first screen printing device;

[0011] It also includes a second longitudinal transmission line, which is located at one end of the battery string segmentation device, and a battery string flipping device is also provided at the upper end of the second longitudinal transmission line;

[0012] Also included is a third longitudinal transmission line, the third longitudinal transmission line being located at a front end side of the second screen printing device;

[0013] It also includes a lateral transfer mechanism, which is installed on the frame and located above the battery string flipping device and the third longitudinal transmission line to transfer the flipped battery string to the third longitudinal transmission line.

[0014] Preferably, the battery string segmenting device comprises a first platform assembly, a second platform assembly, a cutter assembly and a second X-axis adjustment assembly;

[0015] The first platform component is located on a side of the second platform component close to the first screen printing device;

[0016] The first platform component and the second platform component are slidably mounted;

[0017] The cutter assembly is mounted on the second platform assembly;

[0018] The second X-axis adjustment assembly drives the second platform assembly and the cutter assembly to slide synchronously along the X-axis direction.

[0019] Preferably, the longitudinal extension length of the battery string segmentation device is smaller than that of the second longitudinal transmission line;

[0020] When one end of the battery string is at a preset distance from the end of the second longitudinal transmission line, the cutter assembly is activated.

[0021] Preferably, the battery string flipping device comprises a first suction cup plate, a connecting member, a second Y-axis driving assembly, a rotating driving member and a first air supply system;

[0022] The first suction cup plates are provided in two groups and are symmetrically arranged on both sides of the connecting member, and each group of the first suction cup plates has a plurality of first suction holes connected with the first air supply system;

[0023] One end of the connecting member is connected to the rotation driving member to drive the first suction cup plate and the connecting member to rotate;

[0024] The second Y-axis driving assembly is at least used to drive the first suction cup plate, the connecting member and the rotating driving member to move along the Y-axis direction.

[0025] Preferably, the lateral transfer mechanism comprises a second suction cup plate, a second air supply system, a third X-axis drive assembly, a third Y-axis drive assembly and a third Z-axis drive assembly;

[0026] The second suction cup plate has a plurality of second suction holes connected with the second air supply system;

[0027] A third X-axis driving assembly drives the second suction cup plate and the second air supply system to move along the X-axis direction;

[0028] A third Y-axis driving assembly drives the second suction cup plate and the second air supply system to move along the Y-axis direction;

[0029] The third Z-axis driving assembly drives the second suction cup plate and the second air supply system to move along the Z-axis direction.

[0030] Preferably, it further comprises a battery string positioning mechanism, wherein the battery string positioning mechanism comprises a rigid adjustment part and a flexible adjustment part;

[0031] The rigid adjustment part and the flexible adjustment part are respectively slidably installed on both sides of the second longitudinal transmission line, and / or the rigid adjustment part and the flexible adjustment part are respectively slidably installed on both sides of the third longitudinal transmission line.

[0032] A production method based on the above-mentioned busbar-free solar cell string welding production line comprises the following steps:

[0033] Soldering the ribbons to the battery cells to form a battery string;

[0034] Applying glue to the glue printing position on the first end surface of the battery string;

[0035] curing the glue on the glue printing position of the first end surface;

[0036] Applying glue to the glue printing position on the second end surface of the battery string;

[0037] The glue on the printed glue position of the second end surface is cured.

[0038] Preferably, applying glue to the glue printing position on the first end surface of the battery string includes the following steps:

[0039] When the battery string moves to the front end of the first screen printing device or the second screen printing device, detecting the position of the battery sheet;

[0040] According to the detected position of the battery cell, the glue penetration holes of the first screen printing device or the second screen printing device are adjusted to align with the glue printing position on the battery cell.

[0041] Preferably, the method further comprises the following steps:

[0042] When the battery string moves to a preset position of the second longitudinal transmission line, starting a battery string segmenting device to cut the battery string to form a battery string unit of a preset size;

[0043] Adjusting the position of the battery string unit so that the battery string unit is located directly below the battery string flipping device;

[0044] The battery string flipping device is used to absorb and flip the battery string units.

[0045] Preferably, the method further comprises the following steps:

[0046] The side wall surface of the rigid adjustment part is driven to abut against the side wall surface of the battery string unit, and the side wall surface of the flexible adjustment part is driven to abut against the side wall surface of the battery string unit, so as to realize the alignment of the battery string unit on the second longitudinal transmission line and / or the third longitudinal transmission line.

[0047] Compared with the prior art, the beneficial effect of the present invention is that: the above scheme provides a busbar-free battery cell string welding production line, by arranging the string welding machine equipment along the processing direction of the battery cell (i.e. Figure 1 In the direction of the middle arrow), the upstream of the battery string (in the direction of the middle arrow), so that in the process of battery string welding production, the battery cells can be first welded into battery strings to achieve the initial connection between the welding ribbon and the battery cells; then the battery cells are glued and cured to further eliminate the risk of unstable connection between the welding ribbon and the battery cells. This setting, on the one hand, can make the bonding force between the welding ribbon and the battery cell stronger, not easy to debond, and relatively strong in resistance to hot spots, and there is no need to introduce a skin membrane ("skin membrane" is a thin film covering the surface of the battery cell in the prior art), which can further reduce costs; on the other hand, the battery string can be alloyed before lamination, and the controllability is better. Before alloying, the cold welding and hidden cracks can be detected, which can further improve the yield rate and reduce costs. In addition, in the entire production line, the string welding machine equipment, the first screen printing equipment, the battery string segmentation equipment and the second screen printing equipment are arranged in sequence along the processing direction of the battery cells, and the production line can be expanded and upgraded based on the original string welding machine equipment, and the production line transformation cost is low. Correspondingly, the above-mentioned solution provides a production method based on the above-mentioned busbar-free battery cell string welding production line, which can increase the bonding strength between the welding ribbon and the battery cell, and at the same time, improve the yield rate and reduce the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0049] Figure 1 It is a distribution diagram of the production line of the present invention.

[0050] Figure 2 for Figure 1 Schematic diagram of the distribution of various equipment after the middle string welding machine.

[0051] Figure 3 for Figure 2 Schematic diagram of the connection positions of the first screen printing device, the battery string segmenting device, the battery string flipping device and the second screen printing device.

[0052] Figure 4 for Figure 2 Schematic diagram of the structure of the first screen printing device.

[0053] Figure 5 for Figure 4 Schematic diagram of the structure of the central integral part.

[0054] Figure 6 for Figure 4 Enlarged schematic diagram of position D in the middle.

[0055] Figure 7 for Figure 4 Schematic diagram of the structure of the first Z-axis adjustment component.

[0056] Figure 8 It is a schematic diagram of the structure of the printing unit.

[0057] Fig. 9 for Figure 8 Schematic diagram of the enlarged D2 position.

[0058] Fig.10 for Figure 8 A magnified schematic diagram of the D3 position in the figure.

[0059] Fig.11 for Figure 8 Schematic diagram of the explosion of the central printing section.

[0060] Fig.12 This is a schematic diagram of the structure of the battery string segmentation equipment.

[0061] Fig.13 This is a schematic diagram of the structure of the battery string flipping device.

[0062] Fig.14 for Fig.13 Schematic diagram of the enlarged D4 position.

[0063] Fig.15 It is a structural schematic diagram of the lateral transfer mechanism.

[0064] Fig.16 Schematic diagram of the battery string positioning mechanism and the position distribution of the third longitudinal transmission line.

[0065] Fig.17 for Fig.16 A magnified schematic diagram of the D5 position in the figure.

[0066] Description of reference numerals:

[0067] 101, first longitudinal transmission line; 102, second longitudinal transmission line; 103, third longitudinal transmission line; 1, rack; 2, string welding machine equipment; 3, first screen printing equipment; 31, visual inspection unit; 311, camera; 312, fill light; 32, UV lamp reinforcement unit; 33, screen; 34, positioning unit; 341, first installation frame; 342, second installation frame; 343, first X-axis adjustment assembly; 3431, first servo motor; 3432, first fixing seat; 3433, first nut adjustment block; 3434, first adjustment screw rod; 344, First Y-axis adjustment assembly; 3441, second servo motor; 3442, second fixing seat; 3443, second nut adjustment block; 3444, second adjustment screw; 345, first Z-axis adjustment assembly; 3451, driving wheel; 3452, driven wheel; 3453, adjustment wheel; 3454, synchronous belt; 3455, lifting guide rail; 3456, lifting slider; 3457, connecting plate; 3458, nut lifting block; 3459, lifting screw; 35, first angle adjustment assembly; 351, tension adjustment block; 352, fourth adjustment screw; 36, second Angle adjustment assembly; 361, micrometer; 362, elastic member; 37, indicating scale; 38, pointer; 30, printing unit; 301, servo motor; 302, scraper; 303, connecting plate; 3031, first connecting plate; 3032, second connecting plate; 304, first rotating shaft; 305, first adjusting frame; 306, second adjusting frame; 307, second rotating shaft; 308, scraper mounting unit; 3081, mounting plate; 3082, baffle; 4, battery string segmentation equipment; 41, first platform assembly; 42, second platform assembly; 43, cutter assembly; 44, The second X-axis adjustment component; 5. The second screen printing device; 6. The battery string flipping device; 61. The first suction cup plate; 611. The first suction hole; 62. The connecting piece; 63. The second Y-axis driving component; 7. The lateral transfer mechanism; 71. The second suction cup plate; 72. The third X-axis driving component; 73. The third Y-axis driving component; 74. The third Z-axis driving component; 8. The battery string positioning mechanism; 81. The rigid adjustment part; 811. The rigid baffle; 812. The fourth Y-axis driving component; 82. The flexible adjustment part; 821. The flexible baffle; 822. The fifth Y-axis driving component. DETAILED DESCRIPTION

[0068] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0069] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0070] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] See also Figures 1 to 17 The embodiment of the present invention provides a busbar-free battery cell string welding production line, comprising a frame 1, and a string welding machine device 2, a first screen printing device 3, a battery string segmenting device 4, and a second screen printing device 5 which are sequentially arranged on the frame 1 along the battery cell processing direction. The string welding machine device 2 is used to weld the welding strip to the battery cell to form a battery string, the first screen printing device 3 is used to apply glue to the glue printing position on the first end face of the battery string, and solidify the glue on the glue printing position on the first end face, thereby further reinforcing the welding strip and the battery cell; the battery string segmenting device 4 cuts the battery string to form a battery string unit of a preset size, so as to facilitate flipping the formed battery string unit, so that the second screen printing device 5 can apply glue to the glue printing position on the second end face of the battery string unit, and solidify the glue on the glue printing position on the second end face.

[0072] In order to realize the transfer of battery strings or battery string units between different devices and the flipping of battery string units, in this embodiment, it also includes a first longitudinal transmission line 101, a second longitudinal transmission line 102, a third longitudinal transmission line 103, a battery string flipping device 6 and a lateral transfer mechanism 7. Among them, the first longitudinal transmission line 101 connects the end of the string welding machine device 2 and the front end of the first screen printing device 3, and then transfers the battery string formed by the string welding machine device 2 to the first screen printing device 3; the second longitudinal transmission line 102 is located at the end side of the battery string segmentation device 4, and the upper end of the second longitudinal transmission line 102 is also provided with a battery string flipping device 6; the third longitudinal transmission line 103 is located at the front end side of the second screen printing device 5; the lateral transfer mechanism 7 is installed on the frame 1, and is located at the upper end of the battery string flipping device 6 and the third longitudinal transmission line 103, so as to transfer the flipped battery string to the third longitudinal transmission line 103.

[0073] It is worth noting that in order to realize the transportation of battery strings, some equipment may also have corresponding transmission lines. For example, the stringer device 2 is provided with relevant transportation lines, and the first screen printing device 3 is also provided with relevant transportation lines. One end of the first longitudinal transmission line 101 is connected to the relevant transportation line set in the stringer device 2, and the other end is connected to the relevant transportation line set in the first screen printing device 3 to ensure the stable operation of the battery string.

[0074] It is not difficult to understand that in the above scheme, by arranging the stringer device 2 on the first screen printing device 3 along the processing direction of the battery cell (i.e. Figure 1 In the direction of the middle arrow), the upstream of the battery string (in the direction of the middle arrow), so that in the process of battery string welding production, the battery cells can be first welded into a battery string to achieve a preliminary connection between the welding ribbon and the battery cell; then the battery cell is glued and cured to further eliminate the risk of unstable connection between the welding ribbon and the battery cell. This setting, on the one hand, can make the bonding force between the welding ribbon and the battery cell stronger, not easy to fall off the grid, and relatively strong in resistance to hot spots, and there is no need to introduce a skin membrane ("skin membrane" is a thin film covering the surface of the battery cell in the prior art), which can further reduce costs; on the other hand, it can make the battery string form an alloy before lamination, and the controllability is better. Before alloying, the cold welding and hidden cracks can be detected, which can further improve the yield rate and reduce costs.

[0075] In addition, in the entire production line, the stringer equipment 2, the first screen printing equipment 3, the battery string segmentation equipment 4 and the second screen printing equipment 5 are arranged in sequence along the battery cell processing direction, and the production line can be expanded and upgraded based on the original stringer equipment 2, and the production line transformation cost is low.

[0076] For the convenience of explanation, Figure 2In the three-dimensional coordinate system shown, the X-axis direction represents the positive direction and negative direction along the X-axis, the Y-axis direction represents the positive direction and negative direction along the Y-axis, and the Z-axis represents the positive direction and negative direction along the Z-axis. The X-axis direction is also the longitudinal direction, and the Y-axis direction is also the transverse direction.

[0077] See also Figures 4 to 11 The first screen printing device 3 includes a visual inspection unit 31, a UV lamp reinforcement unit 32, a screen 33, a positioning unit 34 and a printing unit 30. The visual inspection unit 31 and the UV lamp reinforcement unit 32 are respectively located at the front end and the end of the first screen printing device 3; the screen 33 is installed on the positioning unit 34, and the positioning unit 34 drives the screen 33 to move along the X-axis direction, the Y-axis direction or the Z-axis direction; the printing unit 30 is located above the screen 33.

[0078] See also Figure 4 The visual inspection unit 31 includes a camera 311 and a fill light 312, wherein the fill light 312 can illuminate the battery string to increase the imaging effect of the camera 311. It is not difficult to understand that after the battery string welded by the string welding machine 2 is transported from the first longitudinal transmission line 101 to the first screen printing device 3, the camera 311 can detect the position of the battery string (actually detect the glue dispensing position on the battery cell), and then according to the position of the battery cell detected by the camera 311, the positioning unit 34 can be controlled to adjust the position of the screen 33, so that the glue penetration holes on the screen 33 can be aligned with the glue position of the battery cell, which can not only ensure the glue printing accuracy, but also save glue liquid.

[0079] See also Figures 5 to 7 The positioning part 34 includes a first mounting frame 341, a second mounting frame 342, a first X-axis adjustment component 343, a first Y-axis adjustment component 344 and a first Z-axis adjustment component 345; wherein the first mounting frame 341 is used to mount the screen 33; the first X-axis adjustment component 343 drives the first mounting frame 341 and the second mounting frame 342 to slide along the X-axis direction; the first Y-axis adjustment component 344 drives the first mounting frame 341, the second mounting frame 342 and the first X-axis adjustment component 343 to slide along the Y-axis direction; the first Z-axis adjustment component 345 drives the first mounting frame 341, the second mounting frame 342, the first X-axis adjustment component 343 and the first Y-axis adjustment component 344 to slide along the Z-axis direction.

[0080] Specifically, the first installation frame 341 and the second installation frame 342 are both configured to be rectangular, and the first installation frame 341 and the second installation frame 342 are configured to be staggered, and the screen 33 can be detachably mounted on the first installation frame 341 .

[0081] Further, the first X-axis adjustment assembly 343 includes a first servo motor 3431, a first fixed seat 3432, a first nut adjustment block 3433 and a first adjustment screw 3434; the first servo motor 3431 and the first fixed seat 3432 are both fixedly mounted on the second mounting frame 342; the first nut adjustment block 3433 is fixedly mounted on the first mounting frame 341; one end of the first adjustment screw 3434 is rotatably mounted on the first fixed seat 3432, and is driven by the first servo motor 3431 (the first servo motor 3431 and the first adjustment screw 3434 can be connected by a coupling), and the other end is threadedly connected to the first nut adjustment block 3433.

[0082] Further, the first Y-axis adjustment component 344 includes a second servo motor 3441, a second fixed seat 3442, a second nut adjustment block 3443 and a second adjusting screw 3444; the second servo motor 3441 and the second fixed seat 3442 are both fixedly mounted on the first Z-axis adjustment component 345; the second nut adjustment block 3443 is fixedly mounted on the second mounting frame 342; one end of the second adjusting screw 3444 is rotatably mounted on the second fixed seat 3442, and is driven by the second servo motor 3441 (the second servo motor 3441 and the second adjusting screw 3444 can be connected by a coupling), and the other end is threadedly connected to the second nut adjustment block 3443.

[0083] Furthermore, the first Z-axis adjustment component 345 includes two lifting drive parts symmetrically arranged about the second installation frame 342, and a linkage drive part that drives the two lifting drive parts to move synchronously. Through the symmetrically arranged lifting drive devices, the screen 33 can move stably during the lifting adjustment process to ensure the level of the screen 33.

[0084] Furthermore, the linkage drive unit includes a driving wheel 3451, a driven wheel 3452, an adjusting wheel 3453 and a synchronous belt 3454; the driven wheel 3452 is arranged one by one with the lifting drive unit, and the synchronous belt 3454 is arranged on the driving wheel 3451, the driven wheel 3452 and the adjusting wheel 3453 to drive the driving wheel 3451, the driven wheel 3452 and the adjusting wheel 3453 to rotate synchronously; the adjusting wheel 3453 is used to adjust the shape surrounded by the synchronous belt 3454. It can be known that there are two adjusting wheels 3453, and the two adjusting wheels 3453 are parallel to the tangential direction of the driven wheel 3452 along the tangential direction of the synchronous belt 3454 side, so that the part of the synchronous belt 3454 located between the driven wheel 3452 and the adjusting wheel 3453 and the part located between the two driven wheels 3452 are relatively parallel to increase the stability of the driven wheel 3452.

[0085] Specifically, the lifting drive unit includes a lifting rail 3455, a lifting slider 3456, a connecting plate 3457, a nut lifting block 3458, a lifting screw 3459 and a screw mounting seat. The lifting rail 3455 is fixed on the frame 1; the lifting slider 3456 is slidably mounted on the lifting rail 3455, specifically along the Z-axis direction, which is also the central axis direction of the lifting screw 3459. Two lifting sliders 3456 are provided, and the two lifting sliders 3456 are symmetrically arranged on both sides of the lifting screw 3459. The connecting plate 3457 is fixedly connected to the lifting slider 3456 and the nut lifting block 3458. The screw mounting seat is fixedly connected to the frame 1, the lifting screw 3459 is rotatably installed on the screw mounting seat, and is rotatably threadedly connected to the nut lifting block 3458. Two screw mounting seats are provided, which are rotatably connected to the two ends of the lifting screw 3459 respectively, and the nut lifting block 3458 is located in the area formed between the two screw mounting seats, so that the screw mounting seats on both sides can limit the nut lifting block 3458; one end of the lifting screw 3459 is fixedly connected to the driven wheel 3452.

[0086] It can be known that the specific process of driving the screen 33 to adjust along the Z-axis direction is: driving the active wheel 3451 to rotate, the active wheel 3451 drives the driven wheel 3452 to rotate through the synchronous belt 3454, and then drives the lifting screw 3459 corresponding to the driven wheel 3452, the lifting screw 3459 and the nut lifting block 3458 cooperate with each other, and then drive the connecting plate 3457 to rise and fall, and further drive the second installation frame 342, the first installation frame 341 and the screen 33 to rise and fall.

[0087] See also Figure 4 ,as well as Figures 8 to 11 The printing unit 30 is installed on the frame 1 to slide along the X-axis direction, and is driven to slide back and forth by a horizontal driving unit installed on the frame 1. The horizontal driving unit can be set as a mechanical transmission structure such as a driving motor and a hinge, or can be directly set as a reciprocating cylinder, a reciprocating motor, etc., which can drive the printing unit 30 to move back and forth. Specifically, it can be known that during the process of printing glue, the horizontal driving unit drives the printing unit 30 to slide back and forth horizontally, and scrapes the glue on the end surface of the screen 33 to make the glue pass through the mesh of the screen 33 and be coated on the battery cell.

[0088] Specifically, the printing unit 30 includes two rubber printing units and a rubber supply unit located between the two adjacent rubber printing units. The rubber printing unit includes a servo motor 301 and a scraper 302. The telescopic end of the servo motor 301 is connected to the scraper 302 to drive the scraper 302 to approach or move away from the screen 33 in the vertical direction. It is worth noting that the rubber printing unit is provided with two symmetrical ones. When the rubber printing unit slides along a first direction, the rubber printing unit on one side approaches the screen 33 to achieve actual printing, and the rubber printing unit on the other side moves away from the screen 33. When the rubber printing unit moves in the opposite direction of the first direction, the rubber printing units on both sides are interchanged to achieve alternating printing of the two rubber printing units.

[0089] In order to meet the adjustment requirements of the scraper 302 , in this embodiment, a connecting component for connecting the servo motor 301 and the scraper 302 is also included.

[0090] Specifically, the connecting assembly includes a connecting plate 303, a first rotating shaft 304, a first adjusting frame 305, a second adjusting frame 306, a second rotating shaft 307 and a scraper mounting portion 308; the first rotating shaft 304 is fixed on the connecting plate 303, and is rotatably connected with the first adjusting frame 305, and a first angle adjustment assembly 35 is provided between the first rotating shaft 304 and the first adjusting frame 305, which is used to adjust the inclination angle of the scraper 302 along the first direction; the first adjusting frame 305, the second adjusting frame 306 and the scraper mounting portion 308 are rotatably connected through the second rotating shaft 307, and a second angle adjustment assembly 36 is provided between the second rotating shaft 307 and the second adjusting frame 306, which is used to adjust the lower end of the scraper 302 to face and be parallel to the screen 33 along the second direction; the first direction and the second direction are perpendicular to each other.

[0091] Specifically, the first angle adjustment assembly 35 includes a tension adjustment block 351 and a fourth adjustment screw 352, and the two ends of the tension adjustment block 351 are connected by the fourth adjustment screw 352; the fourth adjustment screw 352 is rotated to adjust the force between the inner wall surface of the tension adjustment block 351 and the first rotating shaft 304. When adjustment is required, the fourth adjustment screw 352 is loosened to reduce the force between the inner wall surface of the tension adjustment block 351 and the first rotating shaft 304. At this time, the first adjustment frame 305 and the structure connected to the first adjustment frame 305 (such as the second adjustment frame 306, the scraper mounting portion 308, and the scraper 302) can be rotated along the first rotating shaft 304, thereby adjusting the inclination angle of the scraper 302.

[0092] In order to detect the inclination angle of the scraper 302 , an indicating scale 37 and a pointer 38 are also included. The indicating scale 37 is arranged on the tension adjustment block 351 , and the pointer 38 is arranged on the first rotating shaft 304 to indicate the inclination angle of the scraper 302 .

[0093] Further, the second angle adjustment assembly 36 includes a micrometer 361 and an elastic member 362. The micrometer 361 is mounted on the second adjustment frame 306, and one end of the micrometer 361 is against the scraper mounting portion 308. One end of the elastic member 362 is connected to the scraper mounting portion 308, and the other end is connected to the second adjustment frame 306. The elastic member 362 and the micrometer 361 are symmetrically arranged on both sides of the second rotating shaft 307. It can be known that the lower end of the micrometer 361 is against the scraper mounting portion 308, and the other end of the scraper mounting portion 308 is connected through the elastic member 362. The first adjustment frame 305, the second adjustment frame 306 and the scraper mounting portion 308 are rotatably connected through the second rotating shaft 307. According to the lever principle, the scraper mounting portion 308 can be adjusted by applying force to the scraper mounting portion 308 through the micrometer 361, thereby achieving the adjustment of the scraper 302.

[0094] In this embodiment, the scraper mounting portion 308 includes a mounting plate 3081 and a baffle 3082 ; the mounting plate 3081 is fixedly connected to the scraper 302 ; the baffle 3082 is located on both sides of the scraper 302 , and the baffle 3082 is partially inclined away from the scraper 302 .

[0095] In order to adjust the pressure applied by the scraper 302 to the screen 33, in the present embodiment, the connecting assembly is connected to the telescopic end of the servo motor 301 via a guide rail frame; the connecting plate 303 includes a first connecting plate 3031 and a second connecting plate 3032 which are separated from each other; the first connecting plate 3031 and the second connecting plate 3032 are both slidably installed on the guide rail frame; a pressure regulating cylinder is provided between the first connecting plate 3031 and the second connecting plate 3032; one of the fixed end and the telescopic end of the pressure regulating cylinder is installed on the first connecting plate 3031, and the other is installed on the second connecting plate 3032, which can not only not affect the lifting and lowering of the scraper 302, but also realize the adjustment of the pressure of the scraper 302.

[0096] It is worth noting that the second screen printing device 5 is configured to have the same structure as the first screen printing device 3, and the two are only configured at different positions, so no further description is given. Of course, it should be understood that if the positions of the glue dots printed on the second end face of the battery cell are different from those on the first end face, a screen 33 of different specifications and styles can be configured.

[0097] See also Figure 3 and Fig.12 In this embodiment, the battery string segmentation device 4 includes a first platform component 41, a second platform component 42, a cutter component 43 and a second X-axis adjustment component 44; the first platform component 41 is located on the side of the second platform component 42 close to the first screen printing device 3; the first platform component 41 and the second platform component 42 are slidably installed; the cutter component 43 is installed on the second platform component 42; the second X-axis adjustment component 44 drives the second platform component 42 and the cutter component 43 to slide synchronously along the X-axis direction.

[0098] It should be understood that the positions of the first platform assembly 41 and the second platform assembly 42 can be adjusted by the second X-axis adjustment assembly 44, and the position of the cutter assembly 43 can be adjusted so that the production line can adapt to battery strings of different specifications, and the position of the cutter assembly 43 in the X-axis direction can be adjusted according to the position area to be cut.

[0099] It is worth noting that the second X-axis adjustment component 44 can also be configured as a combination structure of a motor, a slider, a guide rail and a screw rod, so it will not be described in detail.

[0100] Furthermore, the longitudinal extension length of the battery string segmentation device 4 is less than the second longitudinal transmission line 102; when one end of the battery string is at a preset distance from the end of the second longitudinal transmission line 102, the cutter assembly 43 is activated. This arrangement eliminates the need for an extra transfer structure between the battery string segmentation device 4 and the second longitudinal transmission line 102, and enables the cut battery string unit to be moved to the bottom of the battery string flipping device 6 to achieve positioning in the X-axis direction, making it easier for the subsequent battery string flipping device 6 to absorb the battery string unit and avoid damage to the battery string.

[0101] See also Figure 3 , Fig.13 and Fig.14 The battery string flipping device 6 includes a first suction cup plate 61, a connecting member 62, a second Y-axis driving assembly 63, a rotating driving member and a first air supply system; the first suction cup plates 61 are provided in two groups and are symmetrically arranged on both sides of the connecting member 62, and each group of first suction cup plates 61 has a plurality of first suction holes 611 connected to the first air supply system; one end of the connecting member 62 is connected to the rotating driving member to drive the first suction cup plate 61 and the connecting member 62 to rotate; the second Y-axis driving assembly 63 is at least used to drive the first suction cup plate 61, the connecting member 62 and the rotating driving member to move along the Y-axis direction. Similarly, the second Y-axis driving assembly 63 can also be set as a combination structure of a motor, a slider, a guide rail and a screw rod, so it will not be described in detail.

[0102] See also Figure 2 and Fig.15 The lateral transfer mechanism 7 includes a second suction cup plate 71, a second air supply system, a third X-axis drive assembly 72, a third Y-axis drive assembly 73 and a third Z-axis drive assembly 74; the second suction cup plate 71 has a plurality of second suction holes connected to the second air supply system; the third X-axis drive assembly 72 drives the second suction cup plate 71 and the second air supply system to move along the X-axis direction; the third Y-axis drive assembly 73 drives the second suction cup plate 71 and the second air supply system to move along the Y-axis direction; the third Z-axis drive assembly 74 drives the second suction cup plate 71 and the second air supply system to move along the Z-axis direction. Similarly, the third X-axis drive assembly 72, the third Y-axis drive assembly 73 and the third Z-axis drive assembly 74 can also be set as a combination structure of a motor, a slider, a guide rail and a screw rod, so they are not described in detail.

[0103] See also Figure 3 , Fig.16 and Fig.17 In order to make the second end surface of the battery string unit print better, in this embodiment, a battery string positioning mechanism 8 is also included, and the battery string positioning mechanism 8 includes a rigid adjustment part 81 and a flexible adjustment part 82; the rigid adjustment part 81 and the flexible adjustment part 82 are respectively slidably installed on both sides of the third longitudinal transmission line 103. It can be understood that the rigid adjustment part 81 and the flexible adjustment part 82 can also be slidably installed on both sides of the second longitudinal transmission line 102, so as to realize the positioning of the battery string unit on the second longitudinal transmission line 102. In this embodiment, the rigid adjustment part 81 and the flexible adjustment part 82 are arranged on both sides of the third longitudinal transmission line 103 as an example for explanation.

[0104] Specifically, the rigid adjustment portion 81 includes a rigid baffle 811 and a fourth Y-axis drive assembly 812, and the flexible adjustment portion 82 includes a flexible baffle 821 and a fifth Y-axis drive assembly 822. Similarly, the fourth Y-axis drive assembly 812 and the fifth Y-axis drive assembly 822 can also be configured as a combination structure of a motor, a slider, a guide rail, and a lead screw, so they are not described in detail.

[0105] Specifically, the rigid baffle 811 is configured as a continuous rod extending along the X-axis direction, and a plurality of flexible baffles 821 are configured at intervals along the X-axis direction.

[0106] The present invention also provides a production method based on the above-mentioned busbar-free battery cell string welding production line, comprising the following steps:

[0107] Soldering the ribbons to the battery cells to form a battery string;

[0108] Apply glue to the glue printing position on the first end surface of the battery string;

[0109] Curing the glue on the printed glue position of the first end surface;

[0110] Apply glue to the glue printing position on the second end surface of the battery string;

[0111] The glue on the printed glue position of the second end surface is cured.

[0112] Specifically, applying glue to the glue printing position on the first end surface of the battery string includes the following steps:

[0113] When the battery string moves to the front end of the first screen printing device 3 or the second screen printing device 5, the position of the battery sheet is detected;

[0114] According to the detected position of the battery cell, the glue penetration holes of the first screen printing device 3 or the second screen printing device 5 are adjusted to align with the glue printing position on the battery cell.

[0115] Furthermore, the following steps are also included:

[0116] When the battery string moves to a preset position of the second longitudinal transmission line 102, the battery string segmenting device 4 is started to cut the battery string to form a battery string unit of a preset size;

[0117] Adjust the position of the battery string unit so that the battery string unit is located directly below the battery string flipping device 6;

[0118] The battery string flipping device 6 is used to absorb and flip the battery string units.

[0119] Specifically, the following steps are also included:

[0120] The side wall surface of the rigid adjustment part 81 is driven to abut against the side wall surface of the battery string unit, and the side wall surface of the flexible adjustment part 82 is driven to abut against the side wall surface of the battery string unit, so as to realize the alignment of the battery string unit on the second longitudinal transmission line 102 and / or the third longitudinal transmission line 103.

[0121] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A busbar-free battery cell string welding production line, characterized in that: It comprises a frame (1), and a string welding device (2), a first screen printing device (3), a battery string segmenting device (4) and a second screen printing device (5) which are sequentially arranged on the frame (1) along the processing direction of the battery cells; It also includes a first longitudinal transmission line (101), wherein the first longitudinal transmission line (101) connects the end of the stringer device (2) and the front end of the first screen printing device (3); It also includes a second longitudinal transmission line (102), the second longitudinal transmission line (102) is located at one end of the battery string segmentation device (4), and a battery string flipping device (6) is also provided at the upper end of the second longitudinal transmission line (102); It also includes a third longitudinal transmission line (103), wherein the third longitudinal transmission line (103) is located at a front end side of the second screen printing device (5); It also includes a lateral transfer mechanism (7), which is installed on the frame (1) and located at the upper end of the battery string flipping device (6) and the third longitudinal transmission line (103) to transfer the flipped battery string to the third longitudinal transmission line (103).

2. A busbar-free solar cell string welding production line according to claim 1, characterized in that: The battery string segmenting device (4) comprises a first platform assembly (41), a second platform assembly (42), a cutter assembly (43) and a second X-axis adjustment assembly (44); The first platform component (41) is located on a side of the second platform component (42) close to the first screen printing device (3); The first platform component (41) and the second platform component (42) are slidably mounted; The cutter assembly (43) is mounted on the second platform assembly (42); The second X-axis adjustment component (44) drives the second platform component (42) and the cutter component (43) to slide synchronously along the X-axis direction.

3. A busbar-free solar cell string welding production line according to claim 2, characterized in that: The battery string segmenting device (4) has a longitudinal extension length that is shorter than the second longitudinal transmission line (102); When one end of the battery string is at a preset distance from the end of the second longitudinal transmission line (102), the cutter assembly (43) is activated.

4. The busbar-free solar cell string welding production line according to claim 1, characterized in that: The battery string flipping device (6) comprises a first suction cup plate (61), a connecting member (62), a second Y-axis driving assembly (63), a rotating driving member and a first air supply system; The first suction cup plates (61) are provided in two groups and are symmetrically arranged on both sides of the connecting member (62), and each group of the first suction cup plates (61) has a plurality of first suction holes (611) connected to the first air supply system; One end of the connecting member (62) is connected to the rotating driving member to drive the first suction cup plate (61) and the connecting member (62) to rotate; The second Y-axis driving component (63) is at least used to drive the first suction cup plate (61), the connecting member (62) and the rotating driving member to move along the Y-axis direction.

5. The busbar-free solar cell string welding production line according to claim 1, characterized in that: The lateral transfer mechanism (7) comprises a second suction cup plate (71), a second air supply system, a third X-axis drive assembly (72), a third Y-axis drive assembly (73) and a third Z-axis drive assembly (74); The second suction cup plate (71) has a plurality of second suction holes connected to the second air supply system; The third X-axis driving assembly (72) drives the second suction cup plate (71) and the second air supply system to move along the X-axis direction; The third Y-axis driving assembly (73) drives the second suction cup plate (71) and the second air supply system to move along the Y-axis direction; The third Z-axis driving assembly (74) drives the second suction cup plate (71) and the second air supply system to move along the Z-axis direction.

6. The busbar-free solar cell string welding production line according to claim 1, characterized in that: It also includes a battery string positioning mechanism (8), wherein the battery string positioning mechanism (8) includes a rigidity adjustment portion (81) and a flexibility adjustment portion (82); The rigid adjustment part (81) and the flexible adjustment part (82) are respectively slidably installed on both sides of the second longitudinal transmission line (102), and / or the rigid adjustment part (81) and the flexible adjustment part (82) are respectively slidably installed on both sides of the third longitudinal transmission line (103).

7. A production method for a busbar-free battery cell string welding production line based on any one of claims 1 to 6, characterized in that: The following steps are involved: Soldering the ribbons to the battery cells to form a battery string; Applying glue to the glue printing position on the first end surface of the battery string; curing the glue on the glue printing position of the first end surface; Applying glue to the glue printing position on the second end surface of the battery string; The glue on the printed glue position of the second end surface is cured.

8. The production method according to claim 7, characterized in that: Applying glue to the glue printing position on the first end surface of the battery string includes the following steps: When the battery string moves to the front end of the first screen printing device (3) or the second screen printing device (5), detecting the position of the battery sheet; According to the detected position of the battery cell, the glue penetration hole of the first screen printing device (3) or the second screen printing device (5) is adjusted to align the glue printing position on the battery cell.

9. The production method according to claim 7, characterized in that: The following steps are also included: When the battery string moves to a preset position of the second longitudinal transmission line (102), starting a battery string segmenting device (4) to cut the battery string to form a battery string unit of a preset size; Adjusting the position of the battery string unit so that the battery string unit is located directly below the battery string flipping device (6); The battery string flipping device (6) is used to absorb and flip the battery string units.

10. The production method according to claim 9, characterized in that: The following steps are also included: The side wall surface of the rigid adjustment part (81) is driven to abut against the side wall surface of the battery string unit, and the side wall surface of the flexible adjustment part (82) is driven to abut against the side wall surface of the battery string unit, so as to realize the alignment of the battery string unit on the second longitudinal transmission line (102) and / or the third longitudinal transmission line (103).

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