Solar cell welding machine

Abstract

The present invention discloses a solar cell welding machine, comprising a machine base, a welding mesh forming device, a conveying device, a cell transferring device, a welding mesh transferring device and a welding device. The welding mesh forming device is located at a welding strip processing station, and welds a plurality of welding strips into a welding mesh; the conveying device has a forward and backward conveying stroke and passes through a paving station and a welding station in sequence; the cell transferring device is arranged corresponding to the paving station, and is used to transfer a plurality of cell sheets to the conveying device at the paving station along the forward and backward directions; the welding mesh transferring device has a forward and backward conveying stroke, and is used to transfer the formed welding mesh from the welding strip processing station to the conveying device at the paving station, so that the welding mesh and the metal grid lines of the plurality of cell sheets on the conveying device are aligned and stacked; the conveying device is used to transfer the plurality of cell sheets and the welding mesh after the alignment and stacking are completed to the welding station, and the welding device is located at the welding station to weld the plurality of cell sheets and the plurality of welding meshes into one.

Description

Technical Field

[0001] The present invention relates to the technical field of solar cell welding, and in particular to a solar cell welding machine. Background Art

[0002] With rising energy prices, the development and utilization of new energy sources has become a major research topic in the energy sector. Due to the advantages of solar energy, such as being pollution-free, geographically independent, and inexhaustible, research into solar power generation has become a key focus of this new energy development and utilization. Using solar cells to generate electricity is a primary way people use solar energy today, so achieving a fast and stable soldering process for solar cells is a key research topic. Summary of the Invention

[0003] The main purpose of the present invention is to provide a solar cell welding machine, which aims to solve the problem of providing a processing equipment that uses welding ribbons to weave a welding mesh and then weld it to the solar cell, with high production efficiency and good stability.

[0004] To achieve the above objectives, the present invention provides a solar cell welding machine, comprising:

[0005] The machine base has a welding strip processing station, a slab laying station and a welding station arranged in sequence along the front and rear directions;

[0006] A welding mesh forming device, provided on the machine base and located at the welding strip processing station, for welding a plurality of welding strips into a welding mesh;

[0007] A conveying device is provided on the machine base, and the conveying device has a forward and backward conveying stroke, and the conveying stroke passes through the paving station and the welding station in sequence;

[0008] A cell transfer device is provided on the machine base and is arranged corresponding to the paving station, for transferring a plurality of cell sheets to the conveying device at the paving station in a front-to-back direction;

[0009] A welding mesh transfer device is provided on the machine base, and has a forward and backward transfer stroke for transferring the formed welding mesh from the welding ribbon processing station to the conveyor device at the paving station, and making the welding mesh aligned and stacked with the metal grid lines of the plurality of battery cells on the conveyor device; and

[0010] A welding device, provided on the machine base and located at the welding station;

[0011] The conveying device is used to transfer the multiple battery cells and the welding mesh after alignment and stacking to the welding station, and the welding device welds the multiple battery cells and the welding mesh into one.

[0012] Optionally, a cell feeding station is further arranged on the machine base, and the cell feeding station and the cell laying station are spaced apart in the left-right direction;

[0013] The solar cell welding machine also includes a cell picking device for adsorbing or releasing the cell. Driven by the cell transfer device, the cell picking device moves the cell from the cell feeding station to the conveying device at the paving station.

[0014] Optionally, the solar cell welding machine also includes a splitting device, which is located on the conveying formation of the conveying device and behind the welding station. The splitting device includes a splitting knife movably mounted on the machine base in the up and down directions, and the splitting knife is used to split and cut multiple stacked solar cells and multiple welding meshes conveyed through the welding station.

[0015] Optionally, the welding mesh forming device further includes:

[0016] A lower die base, fixedly mounted on the machine base;

[0017] An upper die base is movably mounted on the lower die base in the up-down direction, and a pressing plate structure is provided at the lower end of the upper die base;

[0018] A positioning device is provided at the upper end of the lower die base, wherein the positioning device is formed with a plurality of positioning grooves staggered in the left-right and front-back directions, wherein any two of the positioning grooves intersect to form an intersecting groove segment, and a first mounting hole is penetrated through the bottom wall of each intersecting groove segment; and

[0019] A cutting device, provided on the upper die base;

[0020] A mesh welding device, comprising a welding column movably mounted in each of the first mounting holes in an up-down direction, wherein the lower end of the welding column is connected to a heating device;

[0021] Wherein, each of the positioning grooves is correspondingly provided with a welding strip, the upper mold base moves downward, the pressure plate structure downwardly closes the notches of the plurality of positioning grooves, and the welding column moves upward to press against the intersection of the two welding strips, so that the two welding strips are heated and welded together;

[0022] The cutting device cuts a plurality of welding strips so that the plurality of welding strip segments located in the positioning device form a welding mesh.

[0023] Optionally, the positioning device includes:

[0024] A positioning plate, wherein the upper end surface of the positioning plate is provided with the plurality of positioning grooves;

[0025] A guide plate is movably mounted on the lower die base in the vertical direction and is located on one side of the positioning plate. A plurality of guide channels are formed on the upper end of the guide plate. The plurality of guide channels are respectively arranged corresponding to the plurality of positioning grooves. The plurality of guide channels are used to limit and guide the welding strips from the guide channels to pass through the positioning grooves; and

[0026] The guide driving device is arranged on the lower die base and is used for driving the guide plate to move.

[0027] Optionally, the welding column is arranged in a stepped manner, including a first welding column segment, a second welding column segment and a third welding column segment which are distributed from bottom to top and have gradually decreasing outer diameters;

[0028] The oil heating device also includes:

[0029] A heat conducting plate is attached to the heating shell and is arranged on the upper end surface of the heat conducting plate, the upper end surface of the heat conducting plate is provided with a second mounting groove, and the bottom wall of the second mounting groove is provided with a plurality of receiving grooves;

[0030] A synchronization holding block is disposed in the second mounting groove, and each of the synchronization holding blocks is penetrated by a plurality of second mounting holes;

[0031] A plurality of pre-tightening springs, wherein the lower end of each pre-tightening spring is correspondingly arranged in each of the receiving grooves;

[0032] a first limiting plate having a plurality of third mounting holes therethrough, the limiting plate being disposed on the upper end surface of the heat conducting plate and being used to close the notch of the second mounting slot; and

[0033] a second limiting plate, mounted on the lower die base and located above the first limiting plate, the second limiting plate being provided with a plurality of fourth mounting holes;

[0034] Wherein, the positioning plate is arranged on the upper end surface of the second limiting plate;

[0035] The lower end of each first welding column segment is pressed against the upper end of the preload spring, each second welding column segment is correspondingly inserted into the second mounting hole and the third mounting hole, and each third welding column segment is correspondingly inserted into the fourth mounting hole and is arranged in the first mounting hole.

[0036] Optionally, the pressure plate structure includes:

[0037] A pressing plate is provided on the upper die base, wherein the lower end surface of the pressing plate is used to downwardly close the notches of the plurality of positioning grooves, and the lower end surface of the pressing plate is provided with a fourth mounting hole; and

[0038] The pressing member is movably installed in the fourth installation hole along the up-down direction, and is used to fix the welding mesh downward to the upper end of the lower mold base when the upper mold base is separated from the lower mold base.

[0039] Optionally, the pressing plate structure includes a pressing plate, and the pressing plate is movably and adjustably mounted on the upper die base in the up-down direction;

[0040] The pressing plate is provided with a fifth mounting hole, and the fifth mounting hole includes a third hole section and a fourth hole section arranged in a stepped manner in the vertical direction, the hole diameter of the third hole section is smaller than the hole diameter of the fourth hole section to form a second stepped surface arranged downward;

[0041] The elastic connection structure between the pressing plate and the upper die seat comprises:

[0042] A second connecting rod, wherein the upper end of the second connecting rod passes through the fifth mounting hole and is fixedly mounted on the upper die base, and a limiting boss is provided on the outer side of the lower end of the second connecting rod, and the limiting boss is used to allow the pressure plate to be hung on the lower end of the second connecting rod; and

[0043] An adjusting spring is arranged between the pressing plate and the upper die seat.

[0044] Optionally, the edge of the pressing plate structure is set inward relative to the upper mold base to form a first cutting space on the peripheral side of the pressing plate structure;

[0045] The cutting device comprises:

[0046] A fixed seat, provided on the upper die seat;

[0047] a cutting structure comprising a first cutting structure movably mounted on the fixing seat and arranged corresponding to the first cutting space, the first cutting structure having a cutting end and a connecting end opposite to each other; and

[0048] A cutting drive device is provided on the upper die base, and the cutting drive device is drivingly connected to the connecting end;

[0049] Wherein, the cutting end is driven by the cutting drive device to protrude downward from the pressing plate structure, so as to extend into the first cutting space to cut the welding strip.

[0050] Optionally, the first cutting structure includes a plurality of cutting knives, two ends of each cutting knife respectively forming the cutting end and the connecting end, and the middle position of each cutting knife is hingedly mounted on the fixing seat;

[0051] The cutting device further comprises a synchronous connection block, and the connection end of each cutting knife is rotatably connected to the synchronous connection block;

[0052] The cutting drive device drives the synchronous connecting block to move linearly.

[0053] Optionally, the pressing plate structure includes a plurality of pressing plates distributed along the front-to-back direction, and a second cutting space is formed between two adjacent pressing plates;

[0054] The cutting structure further includes a second cutting structure movably mounted on the fixing seat and arranged corresponding to the second cutting space.

[0055] Optionally, the welding mesh transferring device includes:

[0056] A transfer mounting seat, provided on the machine base; and

[0057] The transport mechanism is movably mounted on the transfer mounting seat. The transport mechanism has a transport stroke from the welding strip processing station to the paving station. The transport mechanism includes a welding mesh adsorption structure, which is used to adsorb or release the welding mesh.

[0058] Optionally, the welding mesh adsorption structure includes:

[0059] The mounting body has an adsorption surface and a mounting surface arranged opposite to each other in a front-to-back direction; and

[0060] The magnetic movable body is arranged on one side of the mounting surface of the mounting body. The position of the magnetic movable body along the front-back direction can be adjusted so that the adsorption surface can adsorb or release the welding mesh. The magnetic movable body includes multiple magnets, and the multiple magnets are used to correspond to the welding mesh layout.

[0061] Optionally, the magnetic movable body includes a plurality of magnets, and the plurality of magnets are used to correspond to the arrangement of the welding mesh.

[0062] Optionally, the welding mesh adsorption structure further includes a base, and the base includes:

[0063] a substrate; and

[0064] Two support plates, both extending along the first direction and disposed at both ends of the base plate, the two support plates being used to support the mounting body;

[0065] The magnetic movable body is movably installed between the two supporting plates.

[0066] Optionally, the transport mechanism further includes:

[0067] a first mounting frame, the first mounting frame being movably mounted on the transfer mounting seat in a left-right direction;

[0068] A second mounting frame, movably mounted on the first mounting frame in a front-to-back direction;

[0069] The third mounting frame is movably mounted on the second mounting frame in an up-down direction, and the third mounting frame is used for mounting the welding mesh adsorption structure.

[0070] Optionally, the transfer mounting seat is provided with a first guide rail extending in the left-right direction and a first traction drive system, the first mounting frame is provided with a first slider adapted to the first guide rail, the first slider is slidably mounted on the first guide rail, and the first traction drive system is used to drive the first slider to slide; and / or,

[0071] The first mounting frame is provided with a second guide rail and a second traction drive system extending in a front-to-rear direction, the second mounting frame is provided with a second slider adapted to the second guide rail, the second slider is slidably mounted on the second guide rail, and the second traction drive system is used to drive the second slider to slide; and / or,

[0072] The second mounting frame is provided with a third guide rail and a third traction drive system extending in the up and down directions. The third mounting frame is provided with a third slider adapted to the third guide rail. The third slider is slidably mounted on the third guide rail, and the third traction drive system is used to drive the third slider to slide.

[0073] Optionally, the first traction drive system includes a first conveyor belt provided on the transfer mounting seat, the first conveyor belt includes a first conveying section for conveying in the left and right directions, and the first conveying section is connected to the first mounting frame.

[0074] Optionally, the second traction drive system includes:

[0075] A drive motor having a drive shaft extending in a front-to-rear direction;

[0076] A screw rod is extended in the front-back direction, the screw rod is connected to the driving shaft, a matching nut is sleeved on the screw rod, and the nut is connected to the second mounting bracket.

[0077] Optionally, the third traction drive system includes a second conveyor belt provided on the second mounting frame, the second conveyor belt includes a second conveying section for conveying in an up-down direction, and the second conveying section is connected to the third mounting frame.

[0078] Optionally, the welding mesh transfer device also includes a welding mesh receiving frame, which is installed on the transfer mounting seat and arranged relative to the conveying mechanism in the upper and lower directions. The welding mesh receiving frame has a placement surface facing the conveying mechanism, and the welding mesh adsorption structure is installed on the placement surface.

[0079] Optionally, the solar cell welding machine includes a welding ribbon feeding device, which includes staggered horizontal feeding components and vertical feeding components, respectively used to convey multiple welding ribbons to the welding ribbon processing station along the front-to-back direction and the left-to-right direction.

[0080] Optionally, the lateral loading assembly includes a first mounting bracket and a plurality of first rollers rotatably mounted to the first mounting bracket in the left-right direction, the first mounting bracket is located at the front end of the machine base, the plurality of first rollers are spaced apart in the up-down direction and staggered in the front-back direction, and the plurality of first rollers are used for winding the welding ribbons so as to convey the plurality of welding ribbons in the front-back direction to the welding ribbon processing station; and / or,

[0081] The longitudinal loading assembly includes a second mounting bracket and a plurality of second rollers rotatably mounted to the second mounting bracket along the front-rear direction. The second mounting bracket is located at the right end of the machine base. The plurality of second rollers are spaced apart in the up-down direction and staggered in the left-right direction. The plurality of second rollers are used for winding the welding ribbons so as to convey the plurality of welding ribbons to the welding ribbon processing station along the left-right direction.

[0082] Optionally, the solar cell welding machine also includes two welding ribbon sorting assemblies, which are respectively located between the horizontal feeding assembly and the welding mesh forming device, and between the longitudinal feeding assembly and the welding mesh forming device, and are used to clamp the welding ribbon and flatten the welding points of the welding ribbon.

[0083] Optionally, each of the solder strip finishing assemblies includes a solder strip flattening device, and the solder strip flattening device includes:

[0084] A mounting base, provided on the machine base;

[0085] A first pressing roller is rotatably mounted on the mounting seat; and

[0086] a second pressing roller rotatably disposed on the mounting seat, the second pressing roller and the first pressing roller being arranged side by side, and a gap being formed between the first pressing roller and the second pressing roller, the gap being used for allowing the welding ribbon to pass through;

[0087] At least one of the first pressing roller and the second pressing roller is provided with a protrusion, so that when the welding strip passes through the gap, the welding points on the upper part of the welding strip are flattened by the protrusion.

[0088] Optionally, each of the welding ribbon arranging assemblies includes a cam pressing mechanism, and the cam pressing mechanism includes:

[0089] A base, located on the machine base, and having a bearing plate extending horizontally;

[0090] A holding device, comprising a movable plate extending in a horizontal direction and a plurality of holding rods provided on the movable plate, wherein the movable plate is movably mounted on the base in an up-down direction and is located above the supporting plate, wherein the plurality of holding rods extend in an up-down direction and are spaced apart along the length direction of the movable plate, and a holding space is formed between the lower ends of the plurality of holding rods and the supporting plate for holding the welding strip; and

[0091] The driving device includes a cam rotatably mounted to the base along an axis extending in the length direction of the movable plate, the cam is located above the movable plate and is drivingly connected to the movable plate, and the cam has the function of rotating to drive the movable plate downward so that the multiple holding rods press the welding strip to a pressing position, and driving the movable plate upward so that the multiple holding rods release the welding strip to a loose position.

[0092] In the technical solution of the present invention, the welding mesh forming device welds multiple welding ribbons located at the welding ribbon processing station into welding meshes, and cuts them to form a single formed welding mesh. The formed welding mesh is transferred from the welding ribbon processing station to the conveyor located at the paving station by the welding mesh transfer device. The cell transfer device transfers multiple cell sheets to the conveyor located at the paving station, so that the metal grid lines of multiple cell sheets and multiple welding meshes are aligned and stacked at the paving station. The stacked cell sheets and welding meshes are transferred from the paving station to the welding station by the conveyor device, and the cell sheets and corresponding welding meshes are welded by the welding device to complete the entire cell welding process. Multiple components function at corresponding stations, resulting in a high degree of automation, high production efficiency, and good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0093] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0094] Figure 1 A three-dimensional schematic diagram of an embodiment (one angle) of a solar cell welding machine provided by the present invention;

[0095] Figure 2 for Figure 1 A three-dimensional schematic diagram of an embodiment of a solar cell welding machine (from another angle);

[0096] Figure 3 for Figure 1 A three-dimensional schematic diagram of the middle welding mesh forming device;

[0097] Figure 4 for Figure 3 A three-dimensional schematic diagram of the middle cutting device;

[0098] Figure 5 for Figure 1 3D exploded diagram of the welding mesh transfer device;

[0099] Figure 6 for Figure 1 A three-dimensional schematic diagram of the middle welding strip flattening device;

[0100] Figure 7 for Figure 1 Schematic diagram of the cam clamping mechanism.

[0101] Description of Figure Numbers:

[0102]

[0103]

[0104] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0105] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0106] It should be noted that if a directional indication is involved in an embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0107] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0108] The present invention provides a solar cell welding machine, which involves the processes of loading welding strips, weaving welding meshes, loading and unloading solar cells, welding solar cells and welding meshes, and cutting solar cells. It has high automation, high production efficiency, and good stability. Figures 1 to 7 This is an embodiment of the solar cell welding machine provided by the present invention.

[0109] Please refer to Figures 1 to 2 The solar cell welding machine 100 includes a machine base 1, a welding mesh forming device 3, a conveying device 2, a cell transfer device 5, a welding mesh transfer device 4 and a welding device 7. The machine base 1 has a welding ribbon processing station, a paving station and a welding station arranged in sequence along the front-to-back direction; the welding mesh forming device 3 is arranged on the machine base 1 and is located at the welding ribbon processing station, for welding multiple welding ribbons into welding meshes; the conveying device 2 is arranged on the machine base 1, and the conveying device 2 has a front-to-back conveying stroke, and the conveying stroke passes through the paving station and the welding station in sequence; the cell transfer device 5 is arranged on the machine base 1 and is arranged corresponding to the paving station, for conveying multiple welding ribbons in the front-to-back direction. A plurality of battery cells are transferred to the conveying device 2 at the paving station; the welding mesh transfer device 4 is arranged on the machine base 1, and the welding mesh transfer device 4 has a forward and backward transfer stroke, which is used to transfer the formed welding mesh from the welding strip processing station to the conveying device 2 at the paving station, and make the welding mesh and the metal grid lines of the plurality of battery cells on the conveying device 2 aligned and stacked; the welding device 7 is arranged on the machine base 1 and is at the welding station; wherein, the conveying device 2 is used to transfer the plurality of battery cells and the welding mesh after alignment and stacking to the welding station, and the welding device 7 welds the plurality of battery cells and the plurality of welding meshes into one.

[0110] In the technical solution of the present invention, the welding mesh forming device 3 welds multiple welding ribbons located at the welding ribbon processing station into welding meshes, and cuts them into single formed welding meshes. The formed welding meshes are then transferred from the welding ribbon processing station to the conveyor device 2 located at the paving station by the action of the welding mesh transfer device 4. The cell transfer device 5 transfers multiple cells to the conveyor device 2 located at the paving station, so that the metal grid lines of multiple cells and the multiple welding meshes are aligned and stacked at the paving station. The stacked cells and welding meshes are transferred from the paving station to the welding station by the drive of the conveyor device 2. The cells and corresponding welding meshes are welded by the welding device 7 to complete the entire cell welding process. Multiple components function at corresponding stations, resulting in a high degree of automation, high production efficiency, and good stability.

[0111] Furthermore, the base 1 is provided with a cell feeding station, which is spaced apart from the paving station in the left-right direction. The solar cell welding machine 100 also includes a cell pickup device for absorbing or releasing cells. Driven by the cell transfer device 5, the cell pickup device moves cells from the cell feeding station to the conveyor device 2 located at the paving station. The present invention does not limit the structure of the cell pickup device and the cell transfer device 5. Cell pickup can be performed by vacuum suction cups, magnetic suction cups, or by transfer via a robotic arm, cam drive, or mechanical transmission structure, which will not be described in detail.

[0112] Specifically, each welding mesh is covered with two solar cells. The two solar cells are located on the lower end surfaces of the front and rear half of the welding mesh, respectively, along the front-to-back direction. Multiple solar cells are sequentially laid out along the front-to-back direction, overlapping the corresponding two welding meshes. Specifically, between the two connected welding meshes, solar cells are placed between the rear half of the front welding mesh and the front half of the rear welding mesh. In the present invention, the solar cell welding machine 100 further includes a splitting device 8, which is located on the conveyor 2 and behind the welding station. The splitting device 8 includes a splitting knife movably mounted on the machine base 1 in the vertical direction. The splitting knife is used to split and cut the stacked solar cells and multiple welding meshes conveyed by the welding station. The welding device 7 welds the stacked solar cells to the corresponding two welding meshes. The splitting knife cuts the welding mesh connecting two adjacent solar cells along the front-to-back direction, separating each solar cell string to form a finished product that can be directly assembled with other components. Facilitates subsequent processes.

[0113] It should be noted that the dividing device 8 also includes a driving component to realize the up and down movement of the dividing knife, which will not be explained in detail here.

[0114] See also Figures 3 and 4The welding mesh forming device 3 includes a lower die base 31, an upper die base 32, a positioning device 33, a welding mesh welding device 35 and a cutting device 34. The upper die base 32 is movably installed on the lower die base 31 along the up and down directions. The lower end of the upper die base 32 is provided with a pressure plate structure 321. The positioning device 33 is provided at the upper end of the lower die base 31. A plurality of positioning grooves 331 staggered along the left and right and front and back directions are formed on the positioning device 33. Any two of the positioning grooves 331 intersect with each other to form an intersecting groove section. The bottom wall of each intersecting groove section is penetrated with a first mounting hole. The welding mesh welding device 35 includes A welding column 351 is movably installed in each of the first mounting holes along the up and down directions, and the lower end of the welding column 351 is connected to a heating device. The cutting device 34 is arranged on the upper mold base 32, wherein each of the positioning grooves 331 is respectively passed through a corresponding welding strip. The upper mold base 32 moves downward, and the pressure plate structure 321 closes the notches of the multiple positioning grooves 331 downward. The welding column 351 moves upward to press against the intersection of the two welding strips so that the two welding strips are heated and welded together. The cutting device 34 cuts multiple welding strips so that the multiple welding strip segments located in the positioning device 33 form a welding network.

[0115] In the technical solution of the present invention, the upper die base 32 is movably mounted on the lower die base 31 along the vertical direction, and a pressure plate structure 321 is provided at the lower end of the upper die base 32. The positioning device 33 is provided at the upper end of the lower die base 31. A plurality of positioning grooves 331 staggered along the left and right and front and back directions are formed on the positioning device 33. Any two of the positioning grooves 331 intersect with each other to form an intersecting groove section. The bottom wall of each of the intersecting groove sections is penetrated with a first mounting hole. The welding mesh welding device 35 includes a welding column 351 movably mounted on each of the first mounting holes along the vertical direction. The welding column 351 The lower end of 51 is connected to a heating device, and the cutting device 34 is arranged on the upper mold base 32. In this arrangement, after the welding strips are positioned in each of the positioning grooves 331 by the positioning device 33, the upper mold base 32 moves downward to allow the pressure plate structure 321 to downwardly close the notches of the multiple positioning grooves 331, and then the welding column 351 moves upward to press against the intersection of the two welding strips so that the two welding strips are heated and welded together. After the welding is completed, the multiple welding strips are cut by the cutting device 34 so that the multiple welding strip segments located in the positioning device 33 form a welding network.

[0116] There are many implementation forms of the heating method of the heating device, such as electric heating, steam heating, etc., which are not limited in this application.

[0117] Furthermore, the welding column 351 is arranged in a step-like manner, including a first welding column section, a second welding column section and a third welding column section distributed from bottom to top and arranged with gradually decreasing outer diameters. The heating device includes a heat conducting plate, a synchronous holding block, a plurality of preloaded springs, a first limit plate and a second limit plate. The upper end surface of the heat conducting plate is provided with a second mounting groove, and the bottom wall of the second mounting groove is provided with a plurality of receiving grooves. The synchronous holding block is provided in the second mounting groove, and each of the synchronous holding blocks is penetrated by a plurality of second mounting holes. The lower end of each of the preloaded springs is correspondingly provided on each of the receiving grooves. The first limiting plate is provided with a plurality of third mounting holes in the groove, and the limiting plate is provided on the upper end surface of the heat conducting plate to close the notch of the second mounting groove. The second limiting plate is installed to the lower mold base 31 and is located above the first limiting plate. The second limiting plate is provided with a plurality of fourth mounting holes, wherein the positioning plate 32 is provided on the upper end surface of the second limiting plate, and the lower end of each first welding column segment is correspondingly pressed against the upper end of the preloaded spring, and each second welding column segment is correspondingly provided in the second mounting hole and the third mounting hole, and each of the first The three welding column segments are correspondingly arranged through the fourth mounting hole and are arranged in the first mounting hole. With this arrangement, heat is transferred upward to the welding column 351 through the heat conducting plate, and the multiple welding columns 351 are installed in the second mounting slot through the synchronization holding block, which is beneficial for the installation of the welding column 351 and for keeping the multiple welding columns 351 synchronized. The synchronization holding block is fixed to the second mounting slot by the first limiting plate to prevent the synchronization holding block from being carried upward out of the second mounting slot by the welding column 351. The height of the welding column 351 is adjusted by the pre-tightening spring to prevent the welding column 351 from not contacting the welding ribbon due to inconsistent height, thereby affecting the welding quality. The aperture of the second mounting hole is smaller than the outer diameter of the first welding column segment to limit the upward movement of the first welding column segment and prevent the welding column 351 from popping up. Furthermore, the heat conducting plate, the synchronization holding block and the first limiting plate move upward relative to the second limiting plate. The aperture of the first mounting hole is smaller than the outer diameter of the second welding column segment to limit the upward movement of the second welding column segment.

[0118] In one embodiment of the present invention, the pressure plate structure 321 includes a pressure plate and a clamping member, the pressure plate is arranged on the upper mold base 32, the lower end surface of the pressure plate is used to downwardly close the notches of the multiple positioning grooves 331, the lower end surface of the pressure plate is provided with a fourth mounting hole, the clamping member is movably installed in the fourth mounting hole along the up and down directions, and is used to fix the welding mesh downward to the upper end of the lower mold base 31 when the upper mold base 32 is separated from the lower mold base 31. With such an arrangement, when the upper mold base 32 rises, the clamping member extends out of the fourth mounting hole to fix the welding mesh to the upper end of the lower mold base 31, preventing the welding mesh from adhering to the pressure plate structure 321, thereby facilitating the subsequent movement of the welding mesh.

[0119] The cam is secured to the upper mold base 32 with a spring which is secured to the bottom of the mold base 32 so that the cam can be secured to the bottom of the mold base 32.

[0120] See also Figure 4 The edge of the pressing plate structure 321 is set inward relative to the upper mold base 32 to form a first cutting space on the peripheral side of the pressing plate structure 321. The cutting device 34 includes a fixed seat 341, a cutting structure and a cutting drive device 343. The fixed seat 341 is set on the upper mold base 32. The cutting structure includes a first cutting structure 3421 movably mounted on the fixed seat 341 and corresponding to the first cutting space. The first cutting structure 3421 has opposite cutting ends and The connecting end, the cutting drive device 343 is provided on the upper mold base 32, and the cutting drive device 343 is driven and connected to the connecting end, wherein the cutting end protrudes downward from the pressure plate structure 321 under the drive of the cutting drive device 343, so as to extend into the first cutting space to cut the welding strip. In this way, the cutting drive device 343 drives the cutting structure to move, so that the cutting end protrudes downward from the pressure plate structure 321 and extends into the first cutting space to cut the welding strip.

[0121] It should be noted that the cutting method of the cutting device 34 can be implemented in many ways, such as rotation cutting, linear motion cutting of the welding strip, etc., which is not limited in this application.

[0122] See also Figure 5 The welding mesh transfer device includes a transfer mounting seat and a conveying structure. The transfer mounting seat is arranged on the machine base 1; the conveying mechanism 41 is movably mounted on the transfer mounting seat. The conveying mechanism 41 has a transfer stroke from the welding strip processing station to the paving station. The conveying mechanism 41 includes a welding mesh adsorption structure, which is used to adsorb or release the welding mesh.

[0123] Furthermore, the welding mesh adsorption structure includes a mounting body 411 and a magnetic movable body 412. The mounting body 411 has an adsorption surface and a mounting surface disposed opposite each other along a first direction. The magnetic movable body 412 is disposed on one side of the mounting surface of the mounting body 411. The position of the magnetic movable body 412 along the first direction is adjustable so that the adsorption surface can adsorb or release the welding mesh. When the welding mesh needs to be adsorbed, the magnetic movable body 412 is moved closer to the mounting surface, thereby increasing the magnetic force exerted by the magnetic movable body 412 on the adsorption surface, thereby adsorbing the welding mesh to the adsorption surface. When the welding mesh needs to be released from the adsorption surface, the magnetic movable body 412 is simply moved away from the mounting surface, thereby weakening the magnetic force exerted by the magnetic movable body 412 on the adsorption surface, thereby releasing the welding mesh from the adsorption surface. In this manner, because the welding mesh is attached to the adsorption surface, deformation of the welding mesh during transportation is avoided.

[0124] Furthermore, the magnetic movable body 412 includes multiple magnets 4121, and the multiple magnets 4121 are used to correspond to the welding mesh. With this arrangement, the welding mesh is adsorbed by the multiple magnets 4121 corresponding to the welding mesh, so that the welding mesh is evenly stressed, avoiding deformation of the welding mesh, and achieving good effect.

[0125] Furthermore, the adsorption surface is also provided with a plurality of magnetic holes 4a, and the plurality of magnetic holes 4a are used to correspond to the plurality of magnets 4121 respectively. Such arrangement makes the magnetism of the magnet 4121 acting on the magnetic holes 4a stronger, and the welding mesh can be stably adsorbed on the adsorption surface.

[0126] In order to make the position of the magnetic movable body 412 adjustable along the first direction, the welding mesh adsorption structure 100 also includes a linear drive mechanism, which is arranged on one side of the mounting surface. The linear drive mechanism drives the magnetic movable body 412 to move, thereby achieving the adjustable position of the magnetic movable body 412 along the first direction.

[0127] Specifically, the welding mesh adsorption structure 100 also includes a base 413, and the base 413 includes a substrate 4131 and two support plates 4132. The two support plates 4132 are both extended along the first direction and are respectively arranged at both ends of the substrate 4131. The mounting body 411 is supported by the two support plates 4132, and the magnetic movable body 412 is movably installed between the two support plates 4132. In this way, the installation of the mounting body 411 and the magnetic movable body 412 is realized, and the structure is simple and the effect is good.

[0128] Furthermore, the welding mesh adsorption structure 100 also includes a linear drive mechanism, which includes a cylinder 414. The cylinder body of the cylinder 414 is installed on the base plate 4131. The piston rod of the cylinder 414 has a movable stroke along the first direction, and the free end of the piston rod of the cylinder 414 is connected to the magnetic movable body 412. When the piston rod of the cylinder 414 is extended, the magnetic movable body 412 can be close to the installation surface. When the piston rod of the cylinder 414 is shortened, the magnetic movable body 412 can be moved away from the installation surface. The structure is simple and the effect is good.

[0129] It should be noted that the linear drive mechanism can also be a ball screw, a gear rack, etc., and this application does not limit this.

[0130] The transport mechanism also includes a first mounting frame 415, a second mounting frame 416, and a third mounting frame 417. The first mounting frame 415 is mounted on the transport mounting base in a horizontally movable manner; the second mounting frame 416 is mounted on the first mounting frame 415 in a front-to-back movable manner; and the third mounting frame 417 is mounted on the second mounting frame 416 in a vertically movable manner. The third mounting frame 417 is used to mount the welding mesh suction structure 100. This arrangement allows the welding mesh suction structure to move in the front-to-back, left-to-right, and vertical directions to suction and transport the welding mesh to the workstation, resulting in a simple structure and good performance.

[0131] Specifically, the transfer mounting seat is provided with a first guide rail and a first traction drive system extending in the left and right directions. The first mounting frame 415 is provided with a first slider adapted to the first guide rail. The first slider is slidably installed on the first guide rail, and the first slider is driven to slide by the first traction drive system, so that the first mounting frame 415 moves in the left and right directions.

[0132] Furthermore, the first traction drive system includes a first conveyor belt arranged on the transfer mounting seat, the first conveyor belt includes a first conveying section for conveying in the left and right directions, and the first conveying section is connected to the first mounting frame 415. In this way, when the first conveying section moves, it can drive the first mounting frame 415 to move.

[0133] Specifically, the first mounting frame 415 is provided with a second guide rail and a second traction drive system extending in the front-to-back direction, and the second mounting frame 416 is provided with a second slider adapted to the second guide rail. The second slider is slidably installed on the second guide rail, and the second traction drive system drives the second slider to slide, thereby making the second mounting frame 416 move in the front-to-back direction.

[0134] Furthermore, the second traction drive system includes a drive motor and a screw, the drive motor has a drive shaft extending in the front-to-back direction, the screw extends in the front-to-back direction, the screw is connected to the drive shaft, and a corresponding nut is mounted on the screw. When the screw rotates with the drive shaft, the nut moves linearly along the screw, thereby driving the second mounting frame 416 to move in the front-to-back direction.

[0135] It should be noted that, in order to enable the nut to move linearly along the screw rod, a rotation-stopping structure is further provided between the nut and the first mounting bracket 415 , which will not be described in detail here.

[0136] Specifically, the second mounting frame 416 is provided with a third guide rail and a third traction drive system extending in the up and down directions, and the third mounting frame 417 is provided with a third slider adapted to the third guide rail. The third slider is slidably installed on the third guide rail, and the third slider is driven to slide by the third traction drive system, so that the third mounting frame 417 moves in the up and down directions.

[0137] Furthermore, the third traction drive system includes a second conveyor belt arranged on the second mounting frame 416, the second conveyor belt includes a second conveying section for conveying in the up and down directions, and the second conveying section is connected to the third mounting frame 417, so that when the second conveying section moves, it can drive the third mounting frame 417 to move.

[0138] Reference Figure 2 The welding mesh transfer device 4 also includes a welding mesh receiving frame, which is installed on the transfer mounting seat and arranged relative to the conveying mechanism in the upper and lower directions. The welding mesh receiving frame has a placement surface facing the conveying mechanism, and the welding mesh adsorption structure as described above is installed on the placement surface. The welding mesh adsorption structure installed on the placement surface adsorbs the welding mesh transported by the conveying mechanism to prepare for the next step of processing of the welding mesh, and can avoid deformation of the welding mesh, with good effect.

[0139] In the technical solution of the present invention, to facilitate the transfer and weaving of the solder ribbons, the solar cell welding machine 100 includes a solder ribbon loading device. The device comprises a staggered horizontal loading assembly 91 and a vertical loading assembly 92, each used to transfer multiple solder ribbons to the solder ribbon processing station in the front-to-back direction and the left-to-right direction, respectively. The multiple solder ribbons entering the solder ribbon processing station are divided into two groups: one group extending in the front-to-back direction, and the other group extending in the left-to-right direction. These groups interlace to form a solder mesh, facilitating the operation of the solder mesh forming device.

[0140] To enable the front-to-back feeding of multiple solder ribbons, in one embodiment of the present invention, the lateral feeding assembly 91 includes a first mounting bracket and a plurality of first rollers rotatably mounted to the first mounting bracket. The first mounting bracket is located at the front end of the machine base. The plurality of first rollers are spaced apart vertically and staggered in the front-to-back direction. The plurality of first rollers are used to wind the solder ribbons and convey the plurality of solder ribbons in the front-to-back direction to the solder ribbon processing station. The diameters of the plurality of first rollers are different, and two rollers of different diameters are arranged adjacent to each other and spaced apart vertically for easy identification.

[0141] In order to realize the upward feeding of multiple welding ribbons along the left and right directions, the longitudinal feeding assembly 92 includes a second mounting bracket and a plurality of second rollers rotatably mounted to the second mounting bracket along the front and rear directions. The second mounting bracket is located at the right end of the machine base. The plurality of second rollers are spaced apart in the up and down directions and staggered in the left and right directions. The plurality of second rollers are used for winding welding ribbons to convey the plurality of welding ribbons along the left and right directions to the welding ribbon processing station.

[0142] In an embodiment of the present invention, the horizontal loading component 91 and the vertical loading component 92 can be set as two devices with the same structure, or they can be set with different structures, that is, the above two related technical features can be set at the same time or one of them can be set selectively. The structures of the above-mentioned horizontal loading component 91 and the vertical loading component 92 are set at the same time, and the structures of the two are similar, which is convenient for processing and saves costs.

[0143] For details, please refer to Figure 6 Each of the welding ribbon finishing components includes a welding ribbon flattening device 61, and the welding ribbon flattening device 61 includes a mounting seat 611, a first pressing roller 612 and a second pressing roller 613: the mounting seat 611 is arranged on the machine base 1; the first pressing roller 612 is rotatably arranged on the mounting seat 611; the second pressing roller 613 is rotatably arranged on the mounting seat 611, and the second pressing roller 613 is arranged side by side with the first pressing roller 612, and a gap is formed between the first pressing roller 612 and the second pressing roller 613, and the gap is used for the welding ribbon to pass through; wherein, at least one of the first pressing roller 612 and the second pressing roller 613 is provided with a protrusion, so that when the welding ribbon passes through the gap, the welding points on the upper part of the welding ribbon are flattened by the protrusion. By providing protrusions on the first pressing roller 612 and / or the second pressing roller 613, the protruding parts are flattened while the other parts are not flattened, so as to solve the problem of how to flatten the welding points while ensuring that other parts are not flattened in the same process.

[0144] Furthermore, in the technical solution provided by the present invention, the welding strip flattening device includes a first pressing roller 612 and a second pressing roller 613 arranged side by side. The first pressing roller 612 and the second pressing roller 613 are both rotatably arranged on the mounting seat 611, and a gap is formed between the two. When the welding strip passes through the gap, the first pressing roller 612 and the second pressing roller 613 rotate, so that the raised part is flattened and the other parts are not flattened.

[0145] Please refer to Figure 7 Each of the welding ribbon arranging components includes a cam pressing mechanism 62, and the cam pressing mechanism 62 includes a base 621, a holding device and a cam driving device. The base 621 is located on the machine base 1, and the base 621 has a supporting plate 6221 extending in the horizontal direction; the holding device includes a movable plate 6232 extending in the horizontal direction and a plurality of holding rods 6231 provided on the movable plate 6232. The movable plate 6232 is movably mounted on the base 621 in the vertical direction and is located above the supporting plate 6221. The plurality of holding rods 6231 extend in the vertical direction and along the length of the movable plate 6232. The movable plate 6232 is arranged at intervals, and a holding space is formed between the lower ends of the plurality of holding rods 6231 and the carrier plate 6221 for holding the welding strip. The cam driving device includes a cam rotatably mounted to the base 621 along an axis extending in the length direction of the movable plate 6232. The cam is located above the movable plate 6232 and is drivingly connected to the movable plate 6232. The cam has a function of rotating to drive the movable plate 6232 downward to cause the plurality of holding rods 6231 to press the welding strip, and to drive the movable plate 6232 upward to cause the plurality of holding rods 6231 to release the welding strip. With this configuration, the movement of the plurality of holding rods 6231 is directly controlled by the cam, resulting in good synchronization and faster beats. During the process of the holding rods 6231 being pressed and relaxed by the cam, the impact force on the welding strip is small, resulting in a better welding strip pressing effect and less likely to produce indentations.

[0146] Specifically, the cam rotates along the axis extending in the length direction of the movable plate, thereby driving the movable plate 6232 to move downward or upward, so that the multiple holding rods 6231 can be switched between the holding position and the relaxed position. Specifically, the cam is in the holding position, and the cam rotates to the convex point to contact the movable plate 6232. At this time, the movable plate 6232 moves downward, and the holding space formed by the multiple holding rods 6231 and the supporting plate 6221 is the smallest, which is used to press the welding strip; when the cam continues to rotate to the concave point to contact the movable plate, the cam is in the relaxed position, the movable plate 6232 is upward, and the holding space is the largest. At this time, the welding strip can move to enter the next process.

[0147] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A solar cell welding machine, characterized in that: It includes a machine base, a welding mesh forming device, a conveying device and a welding device, wherein: The machine base has a welding strip processing station, a slab laying station and a welding station arranged in sequence along the front and rear directions; The welding mesh forming device is arranged on the machine base and is located at the welding strip processing station. The welding mesh forming device also includes a lower die base, an upper die base, a positioning device, a cutting device, and a welding mesh welding device. The lower die base is fixedly installed on the machine base, and the upper die base is movably installed on the lower die base in the up and down directions. The lower end of the upper die base is provided with a pressure plate structure, and the positioning device is arranged at the upper end of the lower die base. A plurality of positioning grooves staggered along the left and right and front and back directions are formed on the positioning device. Any two of the positioning grooves intersect with each other to form an intersecting groove segment, and the bottom wall of each of the intersecting groove segments A first mounting hole is provided through the die base, the cutting device is provided on the upper die base, the welding mesh welding device includes a welding column movably mounted in each of the first mounting holes along the vertical direction, and the lower end of the welding column is connected to a heating device; wherein, a welding strip is respectively passed through each of the positioning grooves, the upper die base moves downward, the pressure plate structure downwardly closes the notches of the plurality of positioning grooves, and the welding column moves upward to press against the intersection of the two welding strips, so that the two welding strips are heated and welded together; the cutting device cuts the plurality of welding strips, so that the plurality of welding strip segments located in the positioning device form a welding mesh; The conveying device is used to transfer the multiple battery cells and welding mesh after alignment and stacking to the welding station, and the welding device welds the multiple battery cells and welding mesh into one; The welding column is arranged in a step-like manner, including a first welding column section, a second welding column section and a third welding column section distributed from bottom to top and with gradually decreasing outer diameters. The heating device includes a heat conducting plate, a synchronous holding block, a plurality of pre-tightening springs, a first limiting plate and a second limiting plate. The upper end surface of the heat conducting plate is provided with a second mounting groove, and the bottom wall of the second mounting groove is provided with a plurality of accommodating grooves. The synchronous holding block is arranged in the second mounting groove, and each of the synchronous holding blocks is penetrated by a plurality of second mounting holes. The lower end of each of the pre-tightening springs is correspondingly arranged in each of the accommodating grooves. A limit plate is provided with multiple third mounting holes, the first limit plate is provided on the upper end surface of the heat conducting plate to close the notch of the second mounting slot, the second limit plate is installed to the lower mold base and is located above the first limit plate, the second limit plate is provided with multiple fourth mounting holes, the lower end of each first welding column segment is pressed against the upper end of the preload spring, and each second welding column segment is correspondingly provided in the second mounting hole and the third mounting hole, and each third welding column segment is correspondingly provided in the fourth mounting hole and provided in the first mounting hole.

2. The solar cell welding machine according to claim 1, wherein: Solar cell welding machine also includes: A cell transfer device is provided on the machine base and is arranged corresponding to the paving station, for transferring a plurality of cell sheets to the conveying device at the paving station in a front-to-back direction; The welding mesh transfer device is arranged on the machine base. The welding mesh transfer device has a forward and backward transfer stroke, which is used to transfer the formed welding mesh from the welding strip processing station to the conveying device at the paving station, and make the welding mesh and the metal grid lines of multiple battery cells on the conveying device aligned and stacked.

3. The solar cell welding machine according to claim 1, wherein: The edge of the pressing plate structure is set inward relative to the upper mold base to form a first cutting space on the peripheral side of the pressing plate structure; The cutting device comprises: A fixed seat, provided on the upper die seat; a cutting structure comprising a first cutting structure movably mounted on the fixing seat and arranged corresponding to the first cutting space, the first cutting structure having a cutting end and a connecting end opposite to each other; and A cutting drive device is provided on the upper die base, and the cutting drive device is drivingly connected to the connecting end; Wherein, the cutting end is driven by the cutting drive device to protrude downward from the pressing plate structure, so as to extend into the first cutting space to cut the welding strip.

4. The solar cell welding machine according to claim 1, wherein: The welding mesh transferring device comprises: A transfer mounting seat, provided on the machine base; and The transport mechanism is movably mounted on the transfer mounting seat. The transport mechanism has a transport stroke from the welding strip processing station to the paving station. The transport mechanism includes a welding mesh adsorption structure, which is used to adsorb or release the welding mesh.

5. The solar cell welding machine according to claim 4, characterized in that: The welding mesh adsorption structure includes: The mounting body has an adsorption surface and a mounting surface arranged opposite to each other in a front-to-back direction; and The magnetic movable body is arranged on one side of the mounting surface of the mounting body. The position of the magnetic movable body along the front-back direction can be adjusted so that the adsorption surface can adsorb or release the welding mesh. The magnetic movable body includes multiple magnets, and the multiple magnets are used to correspond to the welding mesh layout.

6. The solar cell welding machine according to claim 1, wherein: The solar cell welding machine includes a welding ribbon feeding device, which includes a staggered horizontal feeding component and a vertical feeding component, which are respectively used to transfer multiple welding ribbons to the welding ribbon processing station along the front-to-back direction and the left-to-right direction.

7. The solar cell welding machine according to claim 6, characterized in that: The lateral loading assembly includes a first mounting bracket and a plurality of first rollers rotatably mounted to the first mounting bracket in the left-right direction, the first mounting bracket is located at the front end of the machine base, the plurality of first rollers are spaced apart in the up-down direction and staggered in the front-back direction, the plurality of first rollers are used for winding the welding ribbons so as to convey the plurality of welding ribbons in the front-back direction to the welding ribbon processing station; and / or, The longitudinal loading assembly includes a second mounting bracket and a plurality of second rollers rotatably mounted to the second mounting bracket along the front-rear direction. The second mounting bracket is located at the right end of the machine base. The plurality of second rollers are spaced apart in the up-down direction and staggered in the left-right direction. The plurality of second rollers are used for winding the welding ribbons so as to convey the plurality of welding ribbons to the welding ribbon processing station along the left-right direction.

8. The solar cell welding machine according to claim 7, characterized in that: The solar cell welding machine also includes two welding ribbon sorting components, which are respectively located between the horizontal feeding component and the welding mesh forming device, and between the longitudinal feeding component and the welding mesh forming device, and are used to clamp the welding ribbon and flatten the welding points of the welding ribbon.

9. The solar cell welding machine according to claim 8, characterized in that: Each of the solder strip finishing assemblies includes a solder strip flattening device, and the solder strip flattening device includes: A mounting base, provided on the machine base; A first pressing roller is rotatably mounted on the mounting seat; and a second pressing roller rotatably disposed on the mounting seat, the second pressing roller and the first pressing roller being arranged side by side, and a gap being formed between the first pressing roller and the second pressing roller, the gap being used for allowing the welding ribbon to pass through; At least one of the first pressing roller and the second pressing roller is provided with a protrusion, so that when the welding strip passes through the gap, the welding points on the upper part of the welding strip are flattened by the protrusion.

10. The solar cell welding machine according to claim 8, characterized in that: Each of the welding ribbon arranging assemblies includes a cam pressing mechanism, and the cam pressing mechanism includes: A base, located on the machine base, and having a bearing plate extending horizontally; A holding device, comprising a movable plate extending in a horizontal direction and a plurality of holding rods provided on the movable plate, wherein the movable plate is movably mounted on the base in an up-down direction and is located above the supporting plate, wherein the plurality of holding rods extend in an up-down direction and are spaced apart along the length direction of the movable plate, and a holding space is formed between the lower ends of the plurality of holding rods and the supporting plate for holding the welding strip; and The driving device includes a cam rotatably mounted to the base along an axis extending in the length direction of the movable plate, the cam is located above the movable plate and is drivingly connected to the movable plate, and the cam has the function of rotating to drive the movable plate downward so that the multiple holding rods press the welding strip to a pressing position, and driving the movable plate upward so that the multiple holding rods release the welding strip to a loose position.

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