A method for welding a bus bar of an overlapping tile battery string and a welding device therefor

Abstract

The present invention provides a method for welding the bus bar of an overlapping tile battery string, which can solve the problems of high welding defect rate, high energy consumption and high pollution existing in the traditional welding method using thermal radiation heating; conductive adhesive is coated on the battery chip; the welding tape is placed on the conductive adhesive of the battery chip; the battery chip and the welding tape bonded by the conductive adhesive are heated integrally, so that the conductive adhesive is cured and the welding tape is fixedly connected to the battery chip by the cured conductive adhesive. The present invention also provides a welding device for the bus bar of an overlapping tile battery string, which includes a linear conveyor belt mechanism; a feeding mechanism for conveying the battery chips and welding tapes to be welded onto the linear conveyor belt mechanism; a conductive adhesive coating mechanism for coating conductive adhesive on the battery chips located on the feeding and coating section of the linear conveyor belt mechanism; a pressing and heating mechanism for pressing and heating the welding tapes to be welded and the battery chips coated with conductive adhesive, and a blanking mechanism for transporting the welded battery chips and welding tapes away from the linear conveyor belt mechanism as a whole.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic module production, and specifically to a welding method and a welding device for the bus bar of a shingled battery string. Background Art

[0002] At present, in this field, the welding operation of the bus bar of the shingled battery string is mostly achieved by means of heat radiation heating welding. It mainly uses a volatile soldering flux and irradiates and heats with an infrared lamp to weld the bus bar to the battery cell. It not only has problems of high welding defect rate and high energy consumption, but also has a problem of high pollution because the soldering flux will cause heavy pollution to the machine equipment, the battery cell and the surrounding environment. Summary of the Invention

[0003] In view of the above problems, the present invention provides a welding method for the bus bar of a shingled battery string, which can solve the problems of high welding defect rate, high energy consumption and high pollution existing in the traditional heat radiation heating welding method. For this reason, the present invention also provides a corresponding welding device.

[0004] A welding method for the bus bar of a shingled battery string, characterized in that it includes the following steps:

[0005] Step (1), coating a conductive adhesive on the battery cell;

[0006] Step (2), placing a welding tape on the conductive adhesive of the battery cell;

[0007] Step (3), heating the battery cell processed in step (2) so that the conductive adhesive cures and the welding tape is fixed to the battery cell by the cured conductive adhesive.

[0008] Further, step (1) specifically refers to dotting the conductive adhesive along the grid lines of the battery cell by means of dispensing or coating the conductive adhesive along the grid lines of the battery cell by means of printing.

[0009] Further, the specific operation of step (1) is that a loading mechanism places the battery cell on a linear conveyor belt mechanism, and a conductive adhesive coating mechanism is arranged outside the linear conveyor belt mechanism, and the conductive adhesive coating mechanism coats the conductive adhesive on the grid lines of the battery cell located on the linear conveyor belt mechanism.

[0010] Further, before the loading mechanism places the battery cell in front of the linear conveyor belt mechanism in step (1) and before placing the welding tape on the conductive adhesive of the battery cell in step (2), a vision positioning and detection mechanism respectively performs position positioning and detection on the battery cell.

[0011] Further, in step (1), the feeding mechanism places the battery cell in front of the linear conveyor mechanism, and the vision positioning and detection mechanism performs position positioning and detection on the battery cell; in step (2), before placing the welding tape on the conductive adhesive of the battery cell, the vision positioning and detection mechanism performs position positioning and detection on the welding tape.

[0012] Further, in step (3), first, the pressing and heating mechanism with heating function presses the battery cell processed in step (2) onto the linear conveyor mechanism with heating function. During the pressing process, the pressing and heating mechanism with heating function and the vacuum adsorption plate with heating function simultaneously perform overall heating on the battery cell; then, the pressing operation of the pressing and heating mechanism on the battery cell is released, and the linear conveyor mechanism with heating function continues to convey the battery cell to the blanking mechanism, and during this conveying process, the linear conveyor mechanism keeps heating the battery cell from the bottom.

[0013] Further, the heating time of the battery cell processed in step (2) is controlled within 25 seconds to 30 seconds, and the pressing and heating time of the pressing and heating mechanism on the welding tape is 3 seconds to 5 seconds.

[0014] A shingled battery string bus bar welding device, characterized in that it includes

[0015] A linear conveyor mechanism, which is sequentially provided with a feeding and coating section and a heating and blanking section along the conveying direction;

[0016] A feeding mechanism for conveying the battery cell and the welding tape to be welded to the feeding and coating section of the linear conveyor mechanism;

[0017] A conductive adhesive coating mechanism is arranged on one outer side of the feeding and coating section of the linear conveyor mechanism for coating the conductive adhesive on the battery cell located on the feeding and coating section of the linear conveyor mechanism;

[0018] A pressing and heating mechanism is arranged on one outer side of the heating and blanking section of the linear conveyor mechanism for pressing and heating the welding tape to be welded and the battery cell coated with the conductive adhesive;

[0019] A blanking mechanism for transporting the welded battery cell and the welding tape away from the linear conveyor mechanism as a whole.

[0020] Furthermore, the conductive glue coating mechanism is a glue dispensing mechanism, which includes a first support beam and a glue dispensing assembly. The first support beam is arranged above the side of the loading and coating section of the linear conveyor mechanism that is connected to the heating and unloading section. The first support beam is equipped with a first linear translation module that is perpendicular to the transmission direction of the linear conveyor mechanism. The glue dispensing assembly is installed on the first linear translation module of the first support beam through an adjustment assembly. The adjustment assembly includes a first lifting cylinder unit. The glue dispensing assembly is installed on the first linear translation module of the support beam through the first lifting cylinder unit.

[0021] Furthermore, the adjustment component also includes a horizontal cylinder unit, the dispensing component is installed on the horizontal cylinder unit, the horizontal cylinder unit is installed on the first lifting cylinder unit, the first lifting cylinder unit is installed on the first linear translation module of the first support beam through a cylinder fixing plate, and the guide rod of the horizontal cylinder unit is parallel to the conveying direction of the linear conveyor belt mechanism.

[0022] Furthermore, the conductive adhesive coating mechanism is a printing coating machine, and the printing coating machine is mounted above a side of the loading and coating section of the linear conveyor mechanism connected to the heating unloading section.

[0023] Furthermore, the pressing and heating mechanism is arranged above the heating unloading section of the linear conveyor mechanism, and includes a downward pressing drive assembly and a pressing plate. The pressing plate is connected to the downward pressing drive assembly, and a heating rod is installed in the pressing plate. The downward pressing drive assembly drives the pressing plate to move vertically downward; the downward pressing drive assembly is preferably a downward pressing cylinder, and the guide rod of the downward pressing cylinder is vertically downward and connected to the pressing plate through an adapter bracket.

[0024] Furthermore, the linear conveyor belt mechanism includes a belt line assembly and a first vacuum adsorption assembly, the belt line assembly includes an annular transmission belt wound around the outside of an active roller and a driven roller, adsorption holes are evenly distributed on the annular transmission belt, and the first vacuum adsorption assembly is arranged in the annular transmission belt and horizontally arranged in sequence along the transmission direction of the linear conveyor belt mechanism.

[0025] Furthermore, a heating rod is installed in the first vacuum adsorption component located in the heating and unloading section of the linear conveyor mechanism.

[0026] Furthermore, it also includes a visual positioning detection mechanism, which includes a vacuum adsorption positioning platform and a first positioning camera. The vacuum adsorption platform is arranged at an outer end of the loading and painting section of the linear conveyor belt mechanism, and the first positioning camera is arranged above the vacuum adsorption platform.

[0027] Furthermore, the visual positioning and detection mechanism further includes a second positioning camera, which is disposed above the heating and loading area of the linear conveyor mechanism and located between the conductive adhesive coating mechanism and the pressing and heating mechanism.

[0028] Further, the loading mechanism and the unloading mechanism both include a cartridge conveying component, a linear conveying component, and a second vacuum adsorption component. The second vacuum adsorption component is installed on the linear conveying component, and the linear conveying component drives the second vacuum adsorption component to move linearly. The cartridge conveying component is used to convey the cartridge to the lower part of the second vacuum adsorption component, and the second vacuum adsorption component is used to adsorb the battery cell or the solder strip to be welded or the overall finished product of the battery cell and the solder strip that has been welded.

[0029] The cartridge conveying component includes a cartridge conveying frame, a cartridge bearing plate, and a cartridge conveying motor. A cartridge for stacking and laminating the battery cells or solder strips to be welded or the finished product of the battery cells and solder strips welded into one body is arranged on the cartridge bearing plate. The cartridge conveying frame includes a bottom plate, and two linear guide rails are arranged in parallel on the bottom plate. The cartridge bearing plate is slidably installed on the two linear guide rails. The output end of the cartridge conveying motor is connected to a synchronous belt unit. A connecting piece is installed on the cartridge bearing plate, and the connecting piece is fixedly connected to the synchronous belt of the synchronous belt unit.

[0030] The cartridge conveying component further includes a jacking unit. The bottom plate, the cartridge bearing plate, and the cartridge are respectively provided with vertically penetrating avoidance cavities. The jacking unit includes a jacking electric cylinder and a jacking plate. The jacking electric cylinder is installed at the bottom of the bottom plate through an electric cylinder fixing seat. The jacking plate is fixedly installed on the jacking plate fixing seat. The pushing end of the jacking electric cylinder faces vertically upward and passes through the avoidance cavity of the bottom plate and then is fixedly connected to the jacking plate fixing seat. The driving end of the jacking electric cylinder is connected to a jacking driving motor.

[0031] The linear conveying component includes a second support beam frame, and a second linear module is installed on the second support beam frame. The second vacuum adsorption component is installed on the second linear module.

[0032] The second vacuum adsorption component includes a vacuum chuck, a chuck fixing frame, and a second lifting cylinder unit. The vacuum chuck is fixedly installed at the bottom of the chuck fixing frame. The chuck fixing frame is connected to the second lifting cylinder unit through a connecting bracket. The second lifting cylinder unit is connected to the second linear module through a cylinder connecting plate.

[0033] Further, the cassette conveying assembly of the loading mechanism is provided with two groups, namely a cell cassette conveying assembly for conveying the cassette loaded with the cells to be welded and a solder tape cassette conveying assembly for conveying the cassette loaded with the solder tape to be welded; the second vacuum adsorption assembly of the loading mechanism is provided with two groups, namely a cell vacuum adsorption assembly and a solder tape vacuum adsorption assembly corresponding to the cell cassette conveying assembly and the solder tape cassette conveying assembly one by one; the cell cassette conveying assembly and the solder tape cassette conveying assembly are arranged side by side and parallel to one side of the vacuum adsorption platform; the second support beam frame of the linear conveying assembly of the loading mechanism is arranged above the vacuum adsorption platform, the cell cassette conveying assembly and the solder tape cassette conveying assembly, and the second lifting cylinder units of the cell vacuum adsorption assembly and the solder tape vacuum adsorption assembly are installed on the same cylinder connecting plate, and the cylinder connecting plate is connected to the second linear module.

[0034] Further, the loading mechanism further includes a manipulator grasping and transferring assembly, and the manipulator grasping and transferring assembly includes a manipulator unit arranged outside the feeding end of the loading and painting section of the linear conveyor mechanism. A third vacuum adsorption assembly is installed at the execution end of the manipulator unit, and the third vacuum adsorption assembly can adsorb the cells or solder tapes to be welded on the vacuum adsorption platform and place them on the loading and painting section of the linear conveyor mechanism under the drive of the manipulator unit.

[0035] Further, the loading mechanism further includes a solder tape loading assembly, and the solder tape loading assembly includes a solder tape drawing module, a solder tape punching and cutting module, and a solder tape wire transferring module. The raw solder tape is flattened and straightened by the solder tape drawing module, then punched and cut by the solder tape punching and cutting module, and then the cut solder tape is moved to the linear conveyor mechanism between the conductive adhesive painting mechanism and the pressing and heating mechanism by the solder tape wire transferring module.

[0036] The beneficial effects of a method for welding the bus bar of a shingled cell string of the present invention are as follows: By directly painting the conductive adhesive on the cell, then placing the solder tape on the conductive adhesive of the cell so that the solder tape and the cell are bonded through the conductive adhesive, and finally heating the whole of the solder tape and the cell bonded by the conductive adhesive to cure the conductive adhesive, the welding connection between the solder tape and the cell is completed. The present invention replaces the existing heat radiation heating welding method with a heat conduction welding method, which not only has low energy consumption. In particular, the overall heating in the method of the present invention adopts a heat conduction heating method of jointly heating by a pressing and heating mechanism and a bottom heating component, which can effectively avoid the problem of poor soldering, thereby improving the welding quality, making its conductivity better, and the bonding strength between the cell and the solder tape higher; In addition, the heat conduction heating welding method used in the method of the present invention no longer requires the use of a soldering agent as in the traditional heat radiation heating welding process, thus also avoiding the pollution problems of the equipment, the cells, and the environment caused by the use of the soldering agent, meeting the increasingly high environmental protection requirements. Brief Description of the Drawings

[0037] Figure 1 Fig. 1 is a top - view structural schematic diagram of the first embodiment of a shingled battery string bus bar welding device according to the present invention;

[0038] Figure 2 Fig. 2 is a three - dimensional schematic diagram of the first viewing direction of the first embodiment of a shingled battery string bus bar welding device according to the present invention;

[0039] Figure 3 Fig. 3 is a three - dimensional schematic diagram of the second viewing direction of the first embodiment of a shingled battery string bus bar welding device according to the present invention;

[0040] Figure 4 Fig. 4 is a structural schematic diagram of the dispensing mechanism in the first embodiment of a shingled battery string bus bar welding device according to the present invention;

[0041] Figure 5 Fig. 5 is a structural schematic diagram of the pressing and heating mechanism in the first embodiment of a shingled battery string bus bar welding device according to the present invention;

[0042] Figure 6 Fig. 6 is a structural schematic diagram of the first vacuum adsorption component with a heating rod in the first embodiment of a shingled battery string bus bar welding device according to the present invention;

[0043] Figure 7 Fig. 7 is a structural schematic diagram of the manipulator grasping and transporting component in the first embodiment of a shingled battery string bus bar welding device according to the present invention;

[0044] Figure 8 Fig. 8 is a structural schematic diagram of the feeding mechanism in the first embodiment of a shingled battery string bus bar welding device according to the present invention;

[0045] Figure 9 Fig. 9 is an enlarged schematic diagram of the battery sheet cassette conveying component in the first embodiment of the welding device according to the present invention;

[0046] Figure 10 is Figure 8 a structural schematic diagram of the ejecting unit of the middle cassette conveying component;

[0047] Figure 11 Fig. 10 is a three - dimensional schematic diagram of the third embodiment of a shingled battery string bus bar welding device according to the present invention;

[0048] Figure 12 Fig. 11 is a structural schematic diagram of the third embodiment of a shingled battery string bus bar welding device according to the present invention.

[0049] Reference Numerals:

[0050] 10 - Linear conveyor mechanism, 10a - Loading and painting section, 10b - Heating and unloading section, 11 - Belt line assembly, 12 - First vacuum adsorption assembly, 13 - Ring transmission belt, 14 - Heating rod, 15 - Thermocouple, A - Conveying direction of the linear conveyor mechanism;

[0051] 20 - Loading mechanism, 21a - Battery cell cartridge, 21b - Welding tape cartridge, 21c - Finished product cartridge, 22 - Manipulator grasping and transfer assembly, 221 - Manipulator unit, 222 - Third vacuum adsorption assembly, 222a - Battery cell adsorption unit, 222b - Welding tape adsorption unit, 223 - Top plate, 224 - Vertical linear guide unit, 225 - Cylinder unit, 23 - Welding tape loading assembly, 231 - Welding tape drawing module, 232 - Welding tape stamping and cutting module, 233 - Welding tape wire transfer module;

[0052] 31 - Dispensing mechanism, 311 - First support beam frame, 312 - Dispensing assembly, 313 - First linear translation module, 314 - First lifting cylinder unit, 315 - Horizontal cylinder unit, 316 - Glue wiping assembly, 32 - Printing and coating machine;

[0053] 40 - Pressing and heating mechanism, 41 - Lower pressing cylinder, 42 - Pressing plate, 43 - Heating rod, 44 - Adapter bracket, 45 - Fixed bracket;

[0054] 50 - Unloading mechanism;

[0055] 60 - Vision positioning and detection mechanism, 61 - Vacuum adsorption positioning platform, 62 - First positioning camera, 63 - Second positioning camera;

[0056] 71 - Cartridge conveying assembly, 71a - Battery cell cartridge conveying assembly, 71b - Welding tape cartridge conveying assembly, 711 - Cartridge conveying frame, 711a - Bottom plate, 711b - Support plate, 711c - Linear guide, 712 - Cartridge bearing plate, 713 - Cartridge conveying motor, 714 - Synchronous belt unit, 715 - Connecting piece, 716 - Pushing unit, 716a - Pushing electric cylinder, 716b - Pushing plate, 716c - Electric cylinder fixed seat, 716d - Pushing plate fixed seat, 716e - Pushing drive motor, 717 - Air knife module, 72 - Linear conveying assembly, 721 - Second support beam frame, 722 - Second linear module, 73 - Second vacuum adsorption assembly, 73a - Battery cell vacuum adsorption assembly, 73b - Welding tape vacuum adsorption assembly, 731 - Vacuum suction cup, 732 - Suction cup fixed frame, 733 - Second lifting cylinder unit, 734 - Connecting bracket, 735 - Cylinder connecting plate. Detailed implementation mode

[0057] A method for welding the bus bar of an overlapping tile battery string according to the present invention includes the following steps.

[0058] Step (1): Coat the conductive adhesive on the battery cell.

[0059] Step (2): Place the welding tape on the conductive adhesive of the battery cell.

[0060] Step (3): Heat the battery cell processed in step (2) so that the conductive adhesive cures and the welding tape is fixed to the battery cell by the cured conductive adhesive.

[0061] Among them, step (1) specifically refers to dotting the conductive adhesive along the grid lines of the battery cell by means of dispensing or coating the conductive adhesive along the grid lines of the battery cell by means of printing; the specific operation is that the loading mechanism places the battery cell on the linear conveyor belt mechanism, and the conductive adhesive coating mechanism is arranged outside the linear conveyor belt mechanism. While the battery cell linearly translates driven by the linear conveyor belt mechanism, the conductive adhesive coating mechanism coats the conductive adhesive on the grid lines of the battery cell; in another way, after the battery cell linearly translates to directly below the conductive adhesive coating mechanism driven by the linear conveyor belt mechanism, the linear conveyor belt mechanism pauses linear transportation, and the conductive adhesive coating mechanism directly applies the conductive adhesive to the grid lines of the battery cell below.

[0062] In step (3), first, the pressing and heating mechanism with heating function presses the battery cell processed in step (2) onto the linear conveyor belt mechanism with heating function. During the pressing process, the pressing and heating mechanism with heating function and the vacuum adsorption plate with heating function simultaneously heat the battery cell as a whole; then, the pressing operation of the pressing and heating mechanism on the battery cell is released, and the linear conveyor belt mechanism with heating function continues to transport the battery cell to the unloading mechanism, and during this transportation process, the linear conveyor belt mechanism keeps heating the battery cell from the bottom; among them, the total heating time for the battery cell processed in step (2) is controlled within 25 seconds to 30 seconds, and the pressing and heating time of the pressing and heating mechanism on the welding tape is 3 seconds to 5 seconds.

[0063] Before the feeding mechanism in step (1) places the battery cell in front of the linear conveyor belt mechanism and before step (2) places the welding tape on the conductive adhesive of the battery cell, the vision positioning and detection mechanism respectively performs position positioning and detection on the battery cell; the vision positioning and detection mechanism performs position positioning and detection on the battery cell twice. Among them, the vision positioning and detection mechanism performs the first position positioning and detection on the battery cell before the battery cell is placed on the linear conveyor belt mechanism. The feeding mechanism can adjust the feeding angle and attitude of the battery cell according to the result of the first position positioning and detection, so that when the battery cell is conveyed by the linear conveyor belt mechanism to below the conductive adhesive coating mechanism, the grid lines on the battery cell where the conductive adhesive is to be coated are exactly below the conductive adhesive coating mechanism; and when the conductive adhesive coating mechanism finishes coating the conductive adhesive on the battery cell (i.e., before placing the welding tape on the coated conductive adhesive of the battery cell), the vision positioning and detection mechanism performs secondary position positioning and detection on the battery cell. The feeding mechanism adjusts the feeding position of the welding tape according to the result of the secondary position positioning and detection of the battery cell, so that the feeding of the welding tape can adapt to the position of the battery cell, ensuring that the welding tape can be accurately placed on the conductive adhesive coated on the battery cell; thus, the two position positioning and detections of the battery cell and the adjustment of the feeding angle and attitude of the battery cell and the feeding angle and attitude of the welding tape according to the results of the two position positioning and detections, on the one hand, ensure the coating accuracy of the conductive adhesive on the battery cell, and on the other hand, ensure the bonding accuracy between the welding tape and the battery cell through the conductive adhesive, thereby greatly improving the welding accuracy and effectively avoiding phenomena such as poor soldering.

[0064] Another implementation manner of the method of the present invention. Similarly, in step (1), the feeding mechanism places the battery cell in front of the linear conveyor belt mechanism, and the vision positioning and detection mechanism performs position positioning and detection on the battery cell. The feeding mechanism can adjust the feeding angle and attitude of the battery cell according to the result of the first position positioning and detection; then, before step (2) places the welding tape on the conductive adhesive of the battery cell, the vision positioning and detection mechanism performs position positioning and detection on the welding tape, and the feeding mechanism adjusts the feeding angle and attitude of the welding tape according to the result of the position positioning and detection of the welding tape by the vision positioning and detection mechanism, so that the feeding of the welding tape can adapt to the angle of the battery cell, ensuring that the welding tape can be accurately placed on the conductive adhesive coated on the battery cell.

[0065] The present invention also provides a special welding device for the above-described method of welding the bus bar of the overlapping tile battery string. The implementation manner of the special welding device will be specifically described below.

[0066] Embodiment 1:

[0067] The special welding device for the method of welding the bus bar of the overlapping tile battery string of the present invention is shown in Figures 1 to 3 and includes

[0068] A linear conveyor belt mechanism 10, wherein the linear conveyor belt mechanism 10 is provided with a loading and coating section 10a and a heating and unloading section 10b in sequence along a conveying direction A;

[0069] The feeding mechanism 20 is used to convey the battery cells and welding strips to be welded to the feeding and coating section 10a of the linear conveyor mechanism 10;

[0070] The conductive adhesive coating mechanism is disposed on an outer side of the feeding and coating section 10a of the linear conveyor mechanism 10 and is used to coat the conductive adhesive on the battery cells on the feeding and coating section 10a of the linear conveyor mechanism 10;

[0071] The pressing and heating mechanism 40 is arranged at an outer side of the heating and unloading section 10b of the linear conveyor mechanism 10, and is used to press and heat the solder strip to be welded and the battery cell coated with the conductive adhesive;

[0072] The unloading mechanism 50 is used to transport the welded battery cells and welding ribbons away from the linear conveyor mechanism 10 as a whole.

[0073] In this embodiment, the conductive glue coating mechanism is a glue dispensing mechanism 31. Figure 4 The glue dispensing mechanism 31 includes a first support beam 311 and a glue dispensing assembly 312. The first support beam 311 is arranged above the loading and coating section 10a of the linear conveyor belt mechanism 10. A first linear translation module 313 perpendicular to the transmission direction A of the linear conveyor belt mechanism 10 is installed on the first support beam 311. The glue dispensing assembly 312 is installed on the first linear translation module 313 of the first support beam 311 through an adjustment assembly; the adjustment assembly includes a first lifting cylinder unit 314 and a horizontal cylinder unit 315, the glue dispensing assembly 312 is installed on the horizontal cylinder unit 315, and the horizontal cylinder unit 315 is installed on the first lifting cylinder unit 314. The first lifting cylinder unit 314 is connected to the slide plate of the first linear translation module 313 through a cylinder fixing plate and is connected to the drag chain; in this embodiment, the glue dispensing assembly 312 is a commercially available general module assembly.

[0074] The pressing and heating mechanism 40 is arranged above the heating and unloading section 10b of the linear conveyor mechanism 10. In order to simplify the device structure, the pressing and heating mechanism 40 is installed on the first support beam 311 through a fixing frame 45 in this embodiment; it includes a pressing drive assembly and a pressing plate 42, as shown in FIG. Figure 5 The pressing plate 42 is connected to the pressing drive assembly, a heating rod 43 is installed in the pressing plate 42, and the pressing drive assembly drives the pressing plate 42 to move vertically downward; the pressing drive assembly is preferably a pressing cylinder 41, the guide rod of the pressing cylinder 41 is vertically downward and connected to the pressing plate 42 through an adapter bracket 44.

[0075] The linear conveyor mechanism 10 includes a belt line assembly 11 and a first vacuum adsorption assembly 12. The belt line assembly 11 includes an annular transmission belt 13 wound around the outside of a driving roller and a driven roller. Adsorption holes are evenly arranged on the annular transmission belt 13. The first vacuum adsorption assembly 12 is arranged inside the annular transmission belt 13 and is horizontally arranged in sequence along the transmission direction A of the linear conveyor mechanism 10. The first vacuum adsorption assembly is a flat plate, and a number of adsorption holes are also arranged on the flat plate. Moreover, a heating rod 14 is installed inside the first vacuum adsorption assembly located in the heating and blanking section 10b of the linear conveyor mechanism 10, see Figure 6 .

[0076] The special welding device of the embodiment of the present invention further includes a vision positioning and detection mechanism 60. The vision positioning and detection mechanism 60 includes a vacuum adsorption positioning platform 61 and a first positioning camera 62. The vacuum adsorption platform 61 is arranged at an outer end of the feeding and painting section 10a of the linear conveyor mechanism 10, and the first positioning camera 62 is arranged above the vacuum adsorption platform 61.

[0077] The feeding mechanism 20 and the blanking mechanism 50 of this embodiment both include a cartridge conveying assembly 71, a linear conveying assembly 72, and a second vacuum adsorption assembly 73. The second vacuum adsorption assembly 73 is installed on the linear conveying assembly 72. The linear conveying assembly 72 drives the second vacuum adsorption component 73 to move linearly. The cartridge conveying assembly 71 is used to convey the cartridge to the lower part of the second vacuum adsorption assembly 73. The second vacuum adsorption assembly 73 is used to adsorb the battery cell or the welding tape to be welded or the overall finished product of the battery cell and the welding tape that has been welded.

[0078] The cartridge conveying assembly 71 includes a cartridge conveying frame 711, a cartridge bearing plate 712, and a cartridge conveying motor 713. A cartridge for loading stacked battery cells or welding tapes or the finished product of the battery cell and the welding tape welded into one body is arranged on the cartridge bearing plate 712. Among them, the cartridge for loading stacked battery cells to be welded in the feeding mechanism 20 is a battery cell cartridge 21a, the cartridge for loading stacked welding tapes to be welded is a welding tape cartridge 21b, and the cartridge for loading the finished product of the battery cell and the welding tape welded into one body in the blanking mechanism is a finished product cartridge 21c. The cartridge conveying frame 711 includes a bottom plate 711a, see Figure 9 , the bottom plate 711a is provided with two parallel support plates 711b. Two parallel support plates 711b are also provided with two linear guide rails 711c extending along the length direction and parallel to each other. The cartridge bearing plate 712 is slidably installed on the two linear guide rails 711c. The output end of the cartridge conveying motor 713 is connected to a synchronous belt unit 714. The cartridge bearing plate 712 is provided with a connecting piece 715, and the connecting piece 715 is fixedly connected to the synchronous belt of the synchronous belt unit 714.

[0079] The cartridge conveying assembly 71 further includes a jacking unit 716, seeFigure 10 , the bottom plate 711a, the cartridge carrier plate 712, and the corresponding cartridges are respectively provided with vertically penetrating avoidance cavities. The blanking unit 716 includes a blanking electric cylinder 716a and a blanking plate 716b. The blanking electric cylinder 716a is installed at the bottom of the bottom plate 711a through an electric cylinder fixing seat 716c. The blanking plate 716b is fixedly installed on the blanking plate fixing seat 716d. The pushing end of the blanking electric cylinder 716a faces vertically upward and passes through the avoidance cavity of the bottom plate 711a and is fixedly connected to the blanking plate fixing seat 716d. The driving end of the blanking electric cylinder 716a is connected to the blanking driving motor 716e;

[0080] The linear conveying assembly 72 includes a second support beam frame 721, see Figure 8 , a second linear module 722 is installed on the second support beam frame 721, and a second vacuum adsorption assembly 73 is installed on the second linear module 722. Thus, the second vacuum adsorption assembly 73 can perform linear translation along the second support beam frame 721 under the drive of the second linear module 722, so as to realize the feeding of the battery cells or welding tapes to be welded, or the discharging operation of the whole battery cells and welding tapes that have been welded;

[0081] The second vacuum adsorption assembly 73 includes a vacuum suction cup 731, a suction cup fixing frame 732, and a second lifting cylinder unit 733. The vacuum suction cup 731 is fixedly installed at the bottom of the suction cup fixing frame 732. The suction cup fixing frame 732 is connected to the second lifting cylinder unit 733 through a connecting bracket 734. The second lifting cylinder unit 733 is connected to the second linear module 722 through a cylinder connecting plate 735.

[0082] In this embodiment, two groups of cartridge conveying assemblies 71 of the feeding mechanism 20 are provided, see Figure 8, respectively, a cell cassette conveying assembly 71a for conveying a cell cassette 21a loaded with cells to be welded and a solder tape cassette conveying assembly 71b for conveying a solder tape cassette 21b loaded with solder tapes to be welded; and two sets of second vacuum adsorption assemblies 73 of the loading mechanism 20 are also provided, namely a cell vacuum adsorption assembly 73a and a solder tape vacuum adsorption assembly 73b corresponding to the cell cassette conveying assembly 71a and the solder tape cassette conveying assembly 71b one by one; at the same time, two suction cup fixing frames 732 of the cell vacuum adsorption assembly 73a and the solder tape vacuum adsorption assembly 73b are provided, that is, two cells and two solder tapes can be adsorbed at one time, and the cell cassette conveying assembly 71a and the solder tape cassette conveying assembly 71b are arranged side by side and parallel to one side of the vacuum adsorption platform 61; the second support beam frame 721 of the linear conveying assembly 72 of the loading mechanism 20 is arranged above the vacuum adsorption platform 61, the cell cassette conveying assembly 71a and the solder tape cassette conveying assembly 71b, and the second lifting cylinder units 733 of the cell vacuum adsorption assembly 73a and the solder tape vacuum adsorption assembly 73b are installed on the same cylinder connecting plate 735, and the cylinder connecting plate 735 is connected to the second linear module 722.

[0083] The loading mechanism 20 further includes a manipulator grasping and transferring assembly 22, as shown in Figure 7 , the manipulator grasping and transferring assembly 22 includes a manipulator unit 221 arranged outside the feeding end of the loading and painting section 10a of the linear conveyor mechanism 10, and a third vacuum adsorption assembly 222 is installed at the execution end of the manipulator unit 221. The third vacuum adsorption assembly 222 can adsorb the cells or solder tapes to be welded located on the vacuum adsorption platform 61 and place the adsorbed cells or solder tapes on the loading and painting section 10a of the linear conveyor mechanism 10 under the drive of the manipulator unit 221; wherein, the third vacuum adsorption assembly 222 includes a cell adsorption unit 222a dedicated to adsorbing cells to be welded and a solder tape adsorption unit 222b dedicated to adsorbing solder tapes to be welded; a top plate 223 is fixedly connected to the execution end of the manipulator unit 221, and two sets of each of the cell adsorption unit 222a and the solder tape adsorption unit 222b are installed on the bottom surface of the top plate 223. Among them, the two sets of solder tape adsorption units 222b are respectively arranged outside the two sets of cell adsorption units 222a in a vertically liftable manner through vertical linear guide units 224, and two cylinder units 225 are arranged on the top plate 223. The guide rods of the cylinder units 225 face downward and pass through the top plate 223 and are connected to a corresponding set of solder tape adsorption units 222b.

[0084] The working process of the special welding device of this embodiment is as follows:

[0085] The battery cells to be welded are stacked in the battery cell cassette 21a, and the cut welding tapes to be welded are stacked in the welding tape cassette 21b. The battery cell cassette conveying component 71a and the welding tape cassette conveying component 71b of the loading mechanism 20 respectively convey the battery cell cassette 21a and the welding tape cassette 21b to the lower part of the second support beam frame 721 of its linear conveying component 72. The battery cell vacuum adsorption component 73a extends downward into the battery cell cassette 21a under the drive of its second lifting cylinder unit 733 and adsorbs a battery cell to be welded, and then rises under the drive of its second lifting cylinder unit 733, so as to take out the battery cell to be welded from the battery cell cassette 21a, and then moves integrally under the drive of the second linear module 722 to the upper part of the vacuum adsorption positioning platform 61 of the vision positioning detection mechanism 60 and places the adsorbed battery cell to be welded on the vacuum adsorption positioning platform 61. The first positioning camera 62 takes pictures and performs positioning detection on the battery cell to be welded adsorbed on the vacuum adsorption positioning platform 61. Subsequently, the manipulator unit 221 of the manipulator grasping and transferring component 22 rotates to the upper part of the vacuum adsorption positioning platform 61, and the battery cell vacuum adsorption unit 222a of the third vacuum adsorption component 222 at the execution end of the manipulator unit 221 adsorbs the battery cell that has been photographed and positioned. The manipulator unit 221 rotates and places the battery cell on the loading and coating section 10a of the linear conveyor mechanism 10 and is adsorbed by the first vacuum adsorption component 12 in the belt assembly 11, and adjusts the angle and posture of the battery cell according to the angle and posture information of the battery cell detected by the photographed positioning during placement; then the belt line assembly 11 of the linear conveyor mechanism 10 operates, conveys the battery cell to be welded to the lower part of the dispensing mechanism 31 and then stops conveying. The first lifting cylinder unit 314 of the dispensing mechanism 31 operates to push the horizontal cylinder unit 315 and the dispensing component 312 as a whole to descend vertically until the dispensing head of the dispensing component 312 approaches the battery cell to be welded. Then the first linear translation module 313 operates and drives the first lifting cylinder unit 314, the horizontal cylinder unit 315 and the dispensing component 312 to move linearly as a whole, so that the dispensing component 312 moves linearly along the grid lines of the battery cell to be welded. During this linear movement, the dispensing head of the dispensing component 312 performs dot coating of conductive adhesive on the grid lines of the battery cell to be welded; then, the horizontal cylinder unit 315 operates and drives the dispensing component 312 to move linearly to the upper part of the next adjacent battery cell to be welded on the linear conveyor belt mechanism. The first linear translation module 313 operates reversely and drives the first lifting cylinder unit 314, the horizontal cylinder unit 315 and the dispensing component 312 to move linearly reversely as a whole, so that the dispensing component 312 moves linearly along the grid lines of the battery cell to be welded, and completes the conductive adhesive dispensing operation for adjacent battery cells;During the dotting process of the conductive adhesive, the feeding mechanism 20 synchronously conveys the solder tape to be welded onto the vacuum adsorption positioning platform 61 (this process is the same as the feeding process of the battery cells). The first positioning camera 62 takes pictures and conducts positioning detection on the solder tape on the vacuum adsorption positioning platform 61. Subsequently, the manipulator unit 221 of the manipulator grabbing and transferring assembly 22 adsorbs the solder tape after positioning detection and adjusts the angle and posture of the solder tape according to the results of the solder tape positioning detection by taking pictures, and then places it on the battery cell with the conductive adhesive already dotted and adhesively connects it to the battery cell. After that, the linear conveying mechanism 10 operates to convey the battery cell and the solder tape that have been adhesively connected by the conductive adhesive to its heating and discharging section 10b and locate them below the pressing plate 42 of the pressing and heating mechanism 40. The pressing cylinder 41 pushes the pressing plate 42 downward to press the adhesively connected battery cell and solder tape for 3 to 5 seconds. Since a heating rod 43 is provided in the pressing plate 42 and a heating rod 14 is provided in the first vacuum adsorption assembly 12 in the heating and discharging section 10b of the belt line assembly 11, during the pressing process, the battery cell and the solder tape are subjected to heat conduction from the upper pressing plate 42 and the lower first vacuum adsorption assembly 12, so that the conductive adhesive is quickly heated and cured. After that, the pressing cylinder 41 resets and drives the pressing plate 42 to move upward. The belt line assembly 11 continues to drive the integrally connected battery cell and solder tape to move to the discharging end. During the movement to the discharging end, the first vacuum adsorption assembly 12 in the belt line assembly 11 still continuously heats from below, which can better ensure the welding and curing effect. Finally, the discharging mechanism 50 adsorbs the integrally connected battery cell and solder tape after welding and places them into the finished product box 21c of the discharging mechanism.

[0086] Embodiment 2:

[0087] The difference between this embodiment and Embodiment 1 is that the adjustment assembly in the dispensing mechanism 31 only includes the first lifting cylinder unit 314. The dispensing assembly 312 is installed on the first lifting cylinder unit 314, and the first lifting cylinder unit 314 is installed on the first linear translation module 313 through a cylinder fixing plate. When the dispensing mechanism 31 in this embodiment performs the dispensing operation on the battery cell to be welded, the first lifting cylinder unit 314 operates to drive the dispensing head of the dispensing assembly 312 to vertically descend to a position close to the battery cell to be welded. The belt line assembly 11 of the linear conveyor belt mechanism 10 operates to drive the battery cell to be welded to linearly move along the conveying direction A below the dispensing head of the dispensing assembly 312. During this linear movement, the dispensing head of the dispensing assembly 312 performs the dotting operation of the conductive adhesive on the grid lines of the battery cell to be welded.

[0088] Embodiment 3:

[0089] The difference between this embodiment and Embodiment 1 and Embodiment 2 lies in that its conductive adhesive coating mechanism is a printing coater 32. The conductive adhesive coating mechanism is a printing coater 32, and the printing coater 32 is installed above one side of the feeding and coating section 10a of the linear conveyor mechanism 10 connecting the heating and discharging section 10b.

[0090] Embodiment 4:

[0091] The main difference between this embodiment and Embodiment 3 lies in the feeding mechanism 20. The following will be specifically described with reference to the drawings:

[0092] See Figure 11 and Figure 12 In this embodiment, the feeding mechanism 20 only includes a set of battery cell cassette conveying components 71a for conveying the battery cell cassettes 21a loaded with the battery cells to be welded. Correspondingly, it also only includes a set of battery cell vacuum adsorption components 73a for adsorbing the battery cells to be welded in the battery cell cassettes 21a. At the same time, the feeding mechanism 20 in this embodiment further includes a solder tape feeding component 23. The solder tape feeding component 23 includes a solder tape drawing module 231, a solder tape punching and cutting module 232, and a solder tape wire moving module 233. The raw solder tape is flattened and straightened by the solder tape drawing module 231, then punched and cut by the solder tape punching and cutting module 232, and then the cut solder tape is moved by the solder tape wire moving module 233 to the linear conveyor mechanism between the conductive adhesive coating mechanism and the pressing and heating mechanism 40. The conductive adhesive coating mechanism in the embodiment uses a printing coater 32. The solder tape drawing module 231, the solder tape punching and cutting module 232, and the solder tape wire moving module 233 in this embodiment are all existing devices in the technical field, and their specific structures will not be elaborated here.

[0093] In this embodiment, since the battery cells to be welded and the solder tapes to be welded are fed separately, the vacuum adsorption positioning platform 61 and the first positioning camera 62 of the visual positioning and detection mechanism 60 can only be used for the positioning and detection of the battery cells to be welded before feeding. Therefore, the visual positioning and detection mechanism 60 in this embodiment further includes a second positioning camera 63. The second positioning camera 63 is arranged above the heating and discharging section 10b of the linear conveyor mechanism 10 and is located between the printing coater 32 and the pressing and heating mechanism 40. After the printing coater 32 coats the conductive adhesive on the grid lines of the battery cells to be welded, the second positioning camera 63 takes pictures and performs positioning and detection on the battery cells coated with the conductive adhesive. The solder tape wire moving module 233 adjusts the corresponding position of the punched solder tape according to the positioning and detection results of the second positioning camera 63 taking pictures of the battery cells and then places it on the battery cells to complete the preliminary bonding of the battery cells and the solder tapes.

[0094] In the above embodiments of the device of the present invention, in addition to taking pictures and positioning the detection of the battery wafers adsorbed by the vacuum adsorption platform 61, the first positioning camera 62 can also perform appearance detection on the battery wafers at the same time. If the appearance detection of the battery wafers fails, the manipulator grasping and transferring assembly 22 directly adsorbs the battery wafers with unqualified appearance detection and transfers them to the battery wafer waste table.

[0095] The specific implementation of the present invention has been described in detail above, but the content is only the preferred implementation of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. A method for welding busbars of a shingled battery string, characterized in that: It includes the following steps: Step (1): Coating conductive adhesive on the battery cell. Step (2): Placing the welding tape on the conductive adhesive of the battery cell. Step (3): Heating the battery cell processed in step (2) so that the conductive adhesive cures, and the welding tape is fixedly connected to the battery cell by the cured conductive adhesive. In step (3), first, the battery cell processed in step (2) is pressed by a pressing and heating mechanism with a heating function onto a linear conveyor belt mechanism with a heating function. During the pressing process, the pressing and heating mechanism with a heating function and the vacuum adsorption plate with a heating function simultaneously perform overall heating on the battery cell. Then, the pressing operation of the pressing and heating mechanism on the battery cell is released, and the linear conveyor belt mechanism with a heating function continues to convey the battery cell to the blanking mechanism, and during this conveying process, the linear conveyor belt mechanism maintains heating operation on the battery cell from the bottom. The pressing and heating mechanism is arranged above the heating and blanking section of the linear conveyor belt mechanism, and it includes a downward pressing drive assembly and a pressing plate. The pressing plate is connected to the downward pressing drive assembly, and heating rods are installed inside the pressing plate. The linear conveyor belt mechanism includes a belt line assembly and a first vacuum adsorption assembly. The belt line assembly includes an annular transmission belt wound around the outside of a driving roller and a driven roller. Adsorption holes are evenly formed in the annular transmission belt. The first vacuum adsorption assembly is arranged inside the annular transmission belt and is horizontally arranged in sequence along the transmission direction of the linear conveyor belt mechanism. Heating rods are also installed inside the first vacuum adsorption assembly located in the heating and blanking section of the linear conveyor belt mechanism.

2. The method for welding the bus bar of an overlapping tile battery string according to claim 1, wherein: Specifically, step (1) refers to dotting conductive adhesive along the grid lines of the battery cell by means of dispensing or coating conductive adhesive along the grid lines of the battery cell by means of printing.

3. A method for welding a busbar of an overlapping tile battery string according to claim 1 or 2, characterized in that: The specific operation of step (1) is that the loading mechanism places the battery cell on the linear conveyor belt mechanism, and a conductive adhesive coating mechanism is arranged outside the linear conveyor belt mechanism, and the conductive adhesive coating mechanism coats conductive adhesive on the grid lines of the battery cell located on the linear conveyor belt mechanism.

4. A method for welding the bus bar of an overlapping tile battery string according to claim 3, characterized in that: Before the loading mechanism places the battery cell on the linear conveyor belt mechanism in step (1) and before placing the welding tape on the conductive adhesive of the battery cell in step (2), a visual positioning and detection mechanism respectively performs position positioning and detection on the battery cell.

5. A method for welding a bus bar of an overlapping tile battery string according to claim 3, characterized in that: Before the loading mechanism places the battery cell on the linear conveyor belt mechanism in step (1), the visual positioning and detection mechanism performs position positioning and detection on the battery cell; before placing the welding tape on the conductive adhesive of the battery cell in step (2), the visual positioning and detection mechanism performs position positioning and detection on the welding tape.

6. A method for welding a bus bar of an overlapping tile battery string according to claim 1, characterized in that: The heating time of the battery cell processed in step (2) is controlled within 25 seconds to 30 seconds, and the pressing and heating time of the pressing and heating mechanism on the welding tape is 3 seconds to 5 seconds.

7. A welding device for the busbar of an overlapping tile battery string, characterized in that: It includes Linear conveyor belt mechanism, the linear conveyor belt mechanism is sequentially provided with a feeding and painting section and a heating and discharging section along the conveying direction; the linear conveyor belt mechanism includes a belt line assembly and a first vacuum adsorption assembly, the belt line assembly includes an annular transmission belt wound around the outside of a driving roller and a driven roller, adsorption holes are evenly formed in the annular transmission belt, and the first vacuum adsorption assembly is arranged inside the annular transmission belt and is horizontally arranged in sequence along the transmission direction of the linear conveyor belt mechanism; a heating rod is further installed in the first vacuum adsorption assembly located in the heating and discharging section of the linear conveyor belt mechanism; Feeding mechanism, used to convey the battery cells and welding tapes to be welded to the feeding and painting section of the linear conveyor belt mechanism; Conductive adhesive painting mechanism, arranged on one outer side of the feeding and painting section of the linear conveyor belt mechanism, used to paint conductive adhesive on the battery cells located on the feeding and painting section of the linear conveyor belt mechanism; Pressing and heating mechanism, arranged on one outer side of the heating and discharging section of the linear conveyor belt mechanism, used to press and heat the welding tapes to be welded and the battery cells already painted with conductive adhesive; the pressing and heating mechanism is arranged above the heating and discharging section of the linear conveyor belt mechanism, and it includes a downward pressing drive assembly and a pressing plate, the pressing plate is connected to the downward pressing drive assembly, heating rods are installed in the pressing plate, and the downward pressing drive assembly drives the pressing plate to move vertically downward; the downward pressing drive assembly is a downward pressing cylinder, and the guide rod of the downward pressing cylinder is vertically downward and is connected to the pressing plate through an adapter bracket; Discharging mechanism, used to transport the welded battery cells and welding tapes away from the linear conveyor belt mechanism as a whole; It further includes a vision positioning and detection mechanism, the vision positioning and detection mechanism includes a vacuum adsorption positioning platform and a first positioning camera, the vacuum adsorption positioning platform is arranged at one outer side end of the feeding and painting section of the linear conveyor belt mechanism, and the first positioning camera is arranged above the vacuum adsorption positioning platform.

8. A welding device for the bus bar of an overlapping tile battery string according to claim 7, characterized in that: The conductive adhesive painting mechanism is a dispensing mechanism, the dispensing mechanism includes a first support beam frame and a dispensing assembly, the first support beam frame is arranged above one side where the feeding and painting section of the linear conveyor belt mechanism is connected to the heating and discharging section, a first linear translation module perpendicular to the transmission direction of the linear conveyor belt mechanism is installed on the first support beam frame, the dispensing assembly is installed on the first linear translation module of the support beam through an adjustment assembly, the adjustment assembly includes a first lifting cylinder unit, and the dispensing assembly is installed on the first linear translation module of the support beam through the first lifting cylinder unit.

9. The string welding device for the overlapping shingle cells according to claim 7, characterized in that: The conductive adhesive coating mechanism is a dispensing mechanism. The dispensing mechanism includes a first support beam frame and a dispensing assembly. The first support beam frame is arranged above one side of the connection between the loading and coating section and the heating and unloading section of the linear conveyor mechanism. A first linear translation module perpendicular to the transmission direction of the linear conveyor mechanism is installed on the first support beam frame. The dispensing assembly is installed on the first linear translation module of the support beam through an adjustment assembly. The adjustment assembly includes a first lifting cylinder unit and a horizontal cylinder unit. The dispensing assembly is installed on the horizontal cylinder unit, and the horizontal cylinder unit is installed on the first lifting cylinder unit. The first lifting cylinder unit is installed on the first linear translation module of the first support beam frame through a cylinder fixing plate. The guide rod of the horizontal cylinder unit is parallel to the conveying direction of the linear conveyor mechanism.

10. The shingled battery string bus bar welding device according to claim 7, characterized in that: The conductive adhesive coating mechanism is a printing and coating machine, which is installed above one side of the connection between the loading and coating section and the heating and unloading section of the linear conveyor mechanism.

11. A welding device for a shingled battery string busbar according to claim 7, characterized in that: Both the loading mechanism and the unloading mechanism include a cartridge conveying component, a linear conveying component, and a second vacuum adsorption component. The second vacuum adsorption component is installed on the linear conveying component. The linear conveying component drives the second vacuum adsorption component to move linearly. The cartridge conveying component is used to convey the cartridge to the lower part of the second vacuum adsorption component. The second vacuum adsorption component is used to adsorb the battery cells or solder tapes to be welded, or the overall finished products of the battery cells and solder tapes that have been welded. The cartridge conveying component includes a cartridge conveying frame, a cartridge bearing plate, and a cartridge conveying motor. A cartridge for stacking the battery cells or solder tapes to be welded or the finished products of the battery cells and solder tapes welded into one body is arranged on the cartridge bearing plate. The cartridge conveying frame includes a bottom plate. Two linear guide rails are arranged in parallel on the bottom plate. The cartridge bearing plate is slidably installed on the two linear guide rails. The output end of the cartridge conveying motor is connected to a synchronous belt unit. A connecting piece is installed on the cartridge bearing plate, and the connecting piece is fixedly connected to the synchronous belt of the synchronous belt unit. The linear conveying component includes a second support beam frame. A second linear module is installed on the second support beam frame. The second vacuum adsorption component is installed on the second linear module. The second vacuum adsorption component includes a vacuum chuck, a chuck fixing frame, and a second lifting cylinder unit. The vacuum chuck is fixedly installed at the bottom of the chuck fixing frame. The chuck fixing frame is connected to the second lifting cylinder unit through a connecting bracket. The second lifting cylinder unit is connected to the second linear module through a cylinder connecting plate.

12. The string welding device for shingled battery strings according to claim 11, wherein: The cartridge conveying component further includes a pushing unit. The bottom plate, the cartridge bearing plate, and the cartridge are respectively provided with vertically penetrating avoidance cavities. The pushing unit includes a pushing electric cylinder and a pushing plate. The pushing electric cylinder is installed at the bottom of the bottom plate through an electric cylinder fixing seat. The pushing plate is fixedly installed on the pushing plate fixing seat. The pushing end of the pushing electric cylinder faces vertically upward and passes through the avoidance cavity of the bottom plate and is fixedly connected to the pushing plate fixing seat. The driving end of the pushing electric cylinder is connected to a pushing driving motor.

13. A welding device for the bus bar of an overlapping tile battery string according to claim 12, characterized in that: The feeding mechanism further includes a manipulator grasping and transferring assembly. The manipulator grasping and transferring assembly includes a manipulator unit disposed outside the feeding end of the feeding and painting section of the linear conveyor belt mechanism. A third vacuum adsorption assembly is installed at the execution end of the manipulator unit. The third vacuum adsorption assembly can adsorb the battery cells or welding tapes to be welded located on the vacuum adsorption positioning platform and place them on the feeding and painting section of the linear conveyor belt mechanism under the drive of the manipulator unit.

14. A welding device for the bus bar of an overlapping tile battery string according to claim 13, characterized in that: The feeding mechanism is provided with two sets of cartridge conveying assemblies, namely a battery cell cartridge conveying assembly for conveying the cartridges loaded with battery cells to be welded and a welding tape cartridge conveying assembly for conveying the cartridges loaded with welding tapes to be welded; the feeding mechanism is provided with two sets of second vacuum adsorption assemblies, namely a battery cell vacuum adsorption assembly and a welding tape vacuum adsorption assembly corresponding to the battery cell cartridge conveying assembly and the welding tape cartridge conveying assembly respectively; the battery cell cartridge conveying assembly and the welding tape cartridge conveying assembly are arranged side by side and parallel to one side of the vacuum adsorption positioning platform; the second support beam frame of the linear conveying assembly of the feeding mechanism is disposed above the vacuum adsorption positioning platform, the battery cell cartridge conveying assembly and the welding tape cartridge conveying assembly. The second lifting cylinder units of the battery cell vacuum adsorption assembly and the welding tape vacuum adsorption assembly are installed on the same cylinder connection plate, and the cylinder connection plate is connected to the second linear module.

15. A welding device for a shingled battery string busbar according to claim 13, characterized in that: The feeding mechanism further includes a welding tape feeding assembly. The welding tape feeding assembly includes a welding tape wire drawing module, a welding tape stamping and wire cutting module, and a welding tape wire transferring module.

16. A welding device for a shingled battery string bus bar according to claim 15, characterized in that: The vision positioning and detection mechanism further includes a second positioning camera. The second positioning camera is disposed above the heating and feeding area of the linear conveyor belt mechanism and is located between the conductive adhesive painting mechanism and the pressing and heating mechanism.

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