A device for printing on the front and back surfaces of a battery piece

Abstract

The utility model relates to a battery piece front and back printing device, including multi -freedom movement platform, the screen board is connected in the multi -freedom movement platform, the screen board sets up the accommodating groove, the bottom array of accommodating groove sets up a plurality of screen holes, the doctor blade component, it includes doctor blade drive mechanism, connecting plate and the doctor blade of rotation connecting in the connecting plate, the doctor blade sets up in the accommodating groove top, doctor blade drive mechanism drives the connecting plate elevating, makes the doctor blade close or away from the screen board. The utility model can reduce the gap between the screen board and the doctor blade, improve the adhesion of screen board and doctor blade, also improve the positioning accuracy of screen board, thereby promote the quality of battery piece printing pattern.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic panel production technology, and in particular to a device for printing the front and back of solar cells. Background Technology

[0002] In photovoltaic cell manufacturing, a printing process is currently used to print on the cells. This process involves using a squeegee to scrape solder paste, adhesive, or copper paste into the mesh of a stencil. The printing paste, after passing through the mesh, is precisely coated onto the surface of the cell, forming characteristic patterns for electrical connections or mechanical fixation structures. The core quality control of this process hinges on the fit between the squeegee and the stencil. Higher fit results in more complete filling of the printing paste and more stable print quality. However, due to inherent errors in equipment processing and assembly, the squeegee and stencil are often not perfectly parallel, leading to small gaps in certain areas. These gaps prevent the printing paste from being fully scraped and pressed into the mesh, causing defects such as missing areas and uneven thickness in the printed pattern, affecting the yield of the cells and ultimately reducing product reliability. Summary of the Invention

[0003] Therefore, the technical problem to be solved by this utility model is to overcome the problem in the prior art that the adhesion between the squeegee and the screen is low, and the printing paste cannot be fully scraped into the mesh, resulting in defects such as partial missing parts and uneven thickness of the printed pattern. In this way, a battery cell front and back printing device is provided, which can reduce the gap between the screen and the squeegee, improve the adhesion between the screen and the squeegee, and improve the positioning accuracy of the screen, thereby improving the quality of the printed pattern of the battery cell.

[0004] To solve the above-mentioned technical problems, this utility model provides a device for printing on the front and back sides of a battery cell, comprising: Multi-degree-of-freedom motion platform; A mesh plate is connected to the multi-degree-of-freedom motion platform. The mesh plate is provided with a receiving groove, and the bottom of the receiving groove is arrayed with multiple mesh holes. A scraper assembly includes a scraper drive mechanism, a connecting plate, and a scraper rotatably connected to the connecting plate. The scraper is positioned above the receiving groove. The scraper drive mechanism drives the connecting plate to move up and down, causing the scraper to move closer to or away from the mesh plate.

[0005] In one embodiment of this utility model, it further includes a bracket and a lifting mechanism for driving the bracket to rise and fall, wherein the multi-degree-of-freedom motion platform and the scraper assembly are both connected to the bracket.

[0006] In one embodiment of the present invention, a transverse mechanism disposed on the bracket is further included, the transverse mechanism driving the scraper assembly to move in the horizontal direction.

[0007] In one embodiment of the present invention, a locking mechanism is further provided on the multi-degree-of-freedom motion platform. The locking mechanism includes a first driving cylinder and a conical lock head. The mesh plate is provided with a conical positioning hole. The first driving cylinder drives the conical lock head to insert into the conical positioning hole.

[0008] In one embodiment of the present invention, a push block and a second drive cylinder for driving the push block to rise and fall are also included. The push block is disposed below the bracket, and the second drive cylinder drives the push block to push the bracket to rise.

[0009] In one embodiment of this utility model, the bracket is provided with a guide rail, and the scraper assembly is slidably connected to the guide rail.

[0010] In one embodiment of this utility model, the bottom of both sides of the multi-degree-of-freedom motion platform is provided with sliding grooves, and the two ends of the mesh plate are respectively slidably disposed in the sliding grooves on both sides, and the bottom of the sliding grooves supports the mesh plate.

[0011] In one embodiment of the present invention, the scraper assembly further includes two sets of scraper units composed of the scraper, the scraper driving mechanism and the connecting plate, and the two sets of scraper units are symmetrically arranged.

[0012] In one embodiment of this utility model, the multi-degree-of-freedom motion platform is provided with a clearance opening, the scraper assembly is disposed directly above the clearance opening, and the mesh plate is located directly below the clearance opening.

[0013] In one embodiment of this utility model, the scraper driving mechanism further includes a ball screw assembly and a third driving cylinder. The ball screw assembly drives the third driving cylinder to rise and fall, and the third driving cylinder drives the connecting plate to move so that the scraper abuts against the mesh plate.

[0014] In one embodiment of this utility model, baffles are provided at both ends of the scraper.

[0015] In one embodiment of this utility model, a support is also included, and the lifting mechanism and the second drive cylinder are both disposed on the support.

[0016] In one embodiment of this utility model, the lifting mechanism further includes a first drive motor, a first lead screw, and a first nut threadedly connected to the first lead screw. The first lead screw is rotatably connected to the support, and the bracket is connected to the first nut. The first drive motor drives the first lead screw to rotate.

[0017] In one embodiment of the present invention, a positioning camera is also provided on one side of the bracket.

[0018] In one embodiment of this utility model, a conveyor belt or a workbench is provided below the mesh plate.

[0019] In one embodiment of this utility model, the multi-degree-of-freedom motion platform is configured as a UVW platform.

[0020] In one embodiment of the present invention, the transverse mechanism includes a timing belt and a second drive motor for driving the timing belt to rotate, the timing belt being connected to the mounting base of the scraper assembly.

[0021] In one embodiment of the present invention, the scraper driving mechanism further includes a mounting base slidably connected to the guide rail, and the ball screw assembly is connected to the mounting base.

[0022] In one embodiment of this utility model, the ball screw assembly includes a second screw rotatably connected to the mounting base, a second nut threadedly connected to the second screw, and a third drive cylinder connected to the second nut.

[0023] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects: The battery cell front and back printing device of this utility model has a multi-degree-of-freedom motion platform that can move horizontally and rotate in multiple directions, driving the screen to move and rotate in multiple directions. The multi-degree-of-freedom motion platform has high repeatability and positioning accuracy, which can improve the positioning accuracy of the screen and ensure that the mesh is aligned with the battery cell, thereby improving the printing accuracy. The squeegee is rotatably connected to the connecting plate, and the squeegee drive mechanism drives the blade of the squeegee to stick to the surface of the screen. When the screen rotates, the squeegee rotates flexibly and adaptively sticks to the surface of the screen, eliminating local micro gaps between the two, eliminating the inherent errors of equipment processing and assembly, and ensuring the fit between the two, so that the squeegee can fully scrape the printing paste into the mesh. Attached Figure Description

[0024] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. Figure 1 This is a schematic diagram of the front and back printing device for the battery cell in a preferred embodiment of the present invention; Figure 2 for Figure 1 The diagram shows the structure of the scraper assembly. Figure 3 for Figure 1 The diagram shows the structure of the mesh panel. Figure 4 for Figure 1 The diagram shows the structure of the multi-degree-of-freedom motion platform. Figure 5 for Figure 1 The diagram shows the structure of the multi-degree-of-freedom motion platform, support frame, and lateral movement mechanism. Figure 6 for Figure 1 The diagram shows a support structure with a lifting mechanism, a push block, and a second drive cylinder.

[0025] Figure 7 for Figure 5 Another structural schematic diagram of the multi-degree-of-freedom motion platform, support, and lateral movement mechanism shown.

[0026] Explanation of reference numerals in the accompanying drawings: 1. Multi-degree-of-freedom motion platform; 11. Clearance opening; 12. Connecting plate; 13. Base plate; 14. Driver; 15. Slide groove; 2. Mesh plate; 21. Mesh hole; 22. Receiving groove; 24. Positioning block; 241. Conical positioning hole; 3. Scraper assembly; 31. Scraper; 32. Rotating shaft; 33. Connecting plate; 34. Mounting base; 35. Third drive cylinder; 36. Second lead screw; 37. Third drive motor; 38. Second nut; 39. Baffle; 4. Lifting mechanism; 41. First lead screw; 42. First nut; 5. Bracket; 51. Guide rail; 52. Clearance opening; 6. Lateral movement mechanism; 7. Positioning camera; 8. First drive cylinder; 9. Support; 91. Second drive cylinder; 92. Push block; 10. Conveyor belt. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0028] For reference Figure 1 , Figure 2 As shown, in one embodiment of this utility model, a battery cell front and back printing device is disclosed, comprising, Multi-degree-of-freedom motion platform 1; A mesh plate 2 is connected to the multi-degree-of-freedom motion platform 1. The mesh plate 2 is provided with a receiving groove 22. The bottom of the receiving groove 22 is provided with a plurality of mesh holes 21. The multi-degree-of-freedom motion platform 1 is configured to adjust the horizontal position and angle of the mesh plate 2. The scraper assembly 3 includes a scraper drive mechanism, a connecting plate 33, and a scraper 31 rotatably connected to the connecting plate 33. The scraper 31 is disposed above the receiving groove 22. The scraper drive mechanism drives the connecting plate 33 to rise and fall, so that the scraper 31 moves closer to or away from the mesh plate 2.

[0029] The battery cell front and back printing device described in this embodiment has a receiving groove 22 for placing printing paste. The printing paste can be scraped and pressed into the mesh 21 by the squeegee 31, thereby accurately printing on the battery cell located below the screen plate 2. The multi-degree-of-freedom motion platform 1 is configured to move horizontally and rotate in multiple degrees of freedom to drive the screen plate 2 to move and rotate in multiple directions. The multi-degree-of-freedom motion platform 1 has high repeatability and positioning accuracy, which can improve the positioning accuracy of the screen plate 2 and ensure that the mesh 21 is aligned with the battery cell, thereby improving the printing accuracy. The squeegee 31 is rotatably connected to the connecting plate 33. The squeegee driving mechanism drives the blade of the squeegee 31 to stick to the surface of the screen plate 2. When the screen plate 2 rotates, the squeegee 31 rotates flexibly and adaptively sticks to the surface of the screen plate 2, eliminating the local micro gaps between the two, eliminating the inherent errors of equipment processing and assembly, and ensuring the fit between the two, so that the squeegee 31 can fully scrape the printing paste into the mesh 21.

[0030] For reference Figure 2 As shown, in one embodiment of this utility model, the scraper 31 is rotatably connected to the connecting plate 33 via the rotating shaft 32 to achieve rotation. Limiting structures are provided on both sides of the connecting plate 33. The limiting structures are used to limit the scraper 31 and limit the rotation angle of the scraper 31 within a specific range.

[0031] For reference Figure 6 As shown, in one embodiment of this utility model, it also includes a bracket 5 and a lifting mechanism 4 for driving the bracket 5 to rise and fall. The multi-degree-of-freedom motion platform 1 and the scraper assembly 3 are both connected to the bracket 5. The lifting mechanism 4 is used to adjust the height of the multi-degree-of-freedom motion platform 1 and the scraper assembly 3 so that the screen 2 and the scraper 31 can be attached to the battery cell located at the printing station.

[0032] For reference Figure 1 As shown, in one embodiment of this utility model, a transverse mechanism 6 is also provided on the support 5. The transverse mechanism 6 drives the scraper assembly 3 to move in the horizontal direction, so that the scraper 31 can move back and forth on the surface of the screen plate 2, and fully scrape and press the printing paste in the receiving groove 22 into the mesh 21.

[0033] For reference Figure 7As shown, in one embodiment of this utility model, a locking mechanism is further provided on the multi-degree-of-freedom motion platform 1. The locking mechanism is used to lock the screen plate 2 on the multi-degree-of-freedom motion platform 1 to prevent the screen plate 2 from shifting when the multi-degree-of-freedom motion platform 1 moves, which would reduce the printing accuracy. Specifically, the locking mechanism includes a first driving cylinder 8 and a conical lock head (not shown). The screen plate 2 is provided with a conical positioning hole 241. When the screen plate 2 is placed on the multi-degree-of-freedom motion platform 1, the first driving cylinder 8 drives the conical lock head to insert into the conical positioning hole 241, thereby locking the screen plate 2. Further, the first driving cylinder 8 drives the conical lock head to rise and fall. When locking the screen plate 2, the first driving cylinder 8 drives the conical lock head to insert into the conical positioning hole 241 from top to bottom.

[0034] For reference Figure 6 As shown, in one embodiment of this utility model, it further includes a push block 92 and a second drive cylinder 91 for driving the push block 92 to rise and fall. The push block 92 is disposed below the bracket 5. During the process of the bracket 5 rising and resetting, the second drive cylinder 91 drives the push block 92 to push the bracket 5 to rise, thereby accelerating the rising speed of the bracket 5 and improving the printing cycle time.

[0035] For reference Figure 1 As shown, in one embodiment of this utility model, the bracket 5 is provided with a guide rail 51, and the scraper assembly 3 is slidably connected to the guide rail 51, so as to ensure that the scraper assembly 3 moves smoothly and accurately through the guide rail 51.

[0036] For reference Figure 7 As shown, in one embodiment of this utility model, the bottom of both sides of the multi-degree-of-freedom motion platform 1 is provided with "L"-shaped grooves 15. The two ends of the screen plate 2 are respectively slidably disposed in the grooves 15 on both sides, and the bottom of the grooves 15 supports the screen plate 2. The grooves 15 can stably connect the screen plate 2 to the bottom of the multi-degree-of-freedom motion platform 1, and can also quickly replace the screen plate 2 and different mesh size combinations 21 to achieve different pattern printing.

[0037] For reference Figure 2 As shown, in one embodiment of the present invention, the scraper assembly 3 further includes two sets of scraper units composed of the scraper 31, the scraper driving mechanism and the connecting plate 33, and the two sets of scraper units are symmetrically arranged to ensure that the scraper assembly 3 can produce the same scraping effect when it reciprocates and presses.

[0038] For reference Figure 4As shown, in one embodiment of this utility model, the multi-degree-of-freedom motion platform 1 is provided with a clearance opening 11, the scraper assembly 3 is disposed directly above the clearance opening 11, and the mesh plate 2 is located directly below the clearance opening 11. The clearance opening 11 provides clearance for the scraper assembly 3, so that when the scraper 31 descends, it can pass through the clearance opening 11 and the blade can be pressed against the upper surface of the mesh plate 2, and it can also move without interfering with the multi-degree-of-freedom motion platform 1.

[0039] For reference Figure 2 As shown, in one embodiment of this utility model, the squeegee driving mechanism further includes a ball screw assembly and a third driving cylinder 35. The output end of the third driving cylinder 35 is connected to the connecting plate 33. The ball screw assembly is used to drive the third driving cylinder 35 to rise and fall, so that the squeegee 31 can abut against the surface of the screen plate 2 or move away from the screen plate 2. The ball screw assembly has high motion precision and can accurately adjust the height of the squeegee 31. The third driving cylinder 35 is used to further drive the squeegee to abut against the screen plate 2, so as to adjust the pressure between the squeegee 31 and the screen plate 2, adapt to different process requirements, and ensure printing uniformity.

[0040] For reference Figure 2 As shown, in one embodiment of the present invention, baffles 39 are provided at both ends of the squeegee 31. The baffles 39 are used to effectively limit the printing paste within the printing width range of the squeegee 31, reduce its leakage from both ends of the squeegee 31, and improve the printing effect.

[0041] For reference Figure 6 As shown, in one embodiment of this utility model, a support 9 is also included, and the lifting mechanism 4 and the second drive cylinder 91 are both disposed on the support 9.

[0042] For reference Figure 6 As shown, in one embodiment of this utility model, the lifting mechanism 4 further includes a first drive motor (not shown), a first lead screw 41, and a first nut 42 threadedly connected to the first lead screw 41. The first lead screw 41 is rotatably connected to the support 9, and the bracket 5 is connected to the first nut 42. The first drive motor drives the first lead screw 41 to rotate, and the first lead screw 41 converts its rotation into linear movement of the first nut 42, thereby driving the bracket 5 to rise and fall.

[0043] For reference Figure 1 As shown, in one embodiment of the present invention, a conveyor belt 10 for transporting the battery cells to the printing station is provided below the screen 2. In other embodiments, a workbench can be placed at the printing station, which can also carry the battery cells to be printed.

[0044] For reference Figure 1As shown, in one embodiment of this utility model, a positioning camera 7 is also provided on one side of the bracket 5. The positioning camera 7 is used to take pictures of the battery cells on the conveyor belt 10 or the workbench to obtain position information, so that the multi-degree-of-freedom motion platform 1 can adjust the position of the mesh plate 2 according to the position information of the battery cells.

[0045] In one embodiment of this utility model, the multi-degree-of-freedom motion platform 1 is configured as a UVW platform. The UVW platform is typically composed of multiple drivers 14, lead screw modules, cross guide rails 51, base plate 13, and connecting plate 12. The base plate 13 is connected to the support 5, and the mesh plate 2 is connected to the connecting plate 12. Both the base plate 13 and the connecting plate 12 are provided with clearance openings 11. The UVW platform is prior art and will not be described in detail here.

[0046] For reference Figure 2 As shown, in one embodiment of the present invention, the scraper driving mechanism further includes a mounting base 34 that is slidably connected to the guide rail 51, and the ball screw assembly is connected to the mounting base 34.

[0047] In one embodiment of the present invention, the transverse mechanism 6 includes a timing belt and a second drive motor that drives the timing belt to rotate. The timing belt is connected to the mounting base 34 of the scraper assembly 3 and drives it to move in the horizontal direction.

[0048] For reference Figure 1 As shown, in one embodiment of this utility model, the ball screw assembly includes a second screw 36 rotatably connected to the mounting base 34 and a second nut 38 threadedly connected to the second screw 36. The third drive cylinder 35 is connected to the second nut 38. The rotation of the second screw 36 is converted into linear movement of the second nut 38, thereby realizing the lifting and lowering of the third drive cylinder 35. The second screw 36 is driven to rotate by a third drive motor 37 disposed on the mounting base 34.

[0049] For reference Figure 5 As shown, in one embodiment of the present invention, the bracket 5 is provided with a clearance opening 52, and the mesh plate 2 is disposed directly below the clearance opening 52.

[0050] For reference Figure 3 and Figure 7 As shown, in one embodiment of this utility model, a positioning block 24 is provided on the mesh plate 2, and the positioning block 24 is provided with the conical positioning hole 241.

[0051] The working principle of the battery cell front and back printing device described in this utility model is as follows: The printing paste is placed into the receiving groove 22 of the screen plate 2, and then the screen plate 2 is pushed into the bottom of the multi-degree-of-freedom motion platform 1. The screen plate 2 is locked and positioned by the conical lock head. The battery cell to be printed is transported to the bottom of the screen plate 2 by the conveyor belt 10. The positioning camera 7 obtains the position coordinate data of the battery cell. The multi-degree-of-freedom motion platform 1 moves under the guidance of the position coordinate data so that the mesh 21 is aligned with the position of the battery cell to be printed. Then, the lifting mechanism 4 drives the bracket 5 to descend so that the screen plate 2 is close to the surface of the battery cell. The ball screw assembly drives the squeegee 31 to press the blade against the surface of the screen plate 2. Then, the third drive cylinder 3 drives the squeegee 31 to adjust the pressure between the squeegee 31 and the screen plate 2. Finally, the transverse mechanism 6 drives the squeegee 31 to move back and forth along the surface of the screen plate 2, scraping the printing paste into the mesh 21. The printing paste is accurately scraped onto the battery cell. After printing is completed, the lifting mechanism 4 drives the bracket 5 to reset, and the squeegee drive mechanism drives the squeegee 31 to reset, so that the battery cell can be removed.

[0052] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A device for printing on the front and back sides of a battery cell, characterized in that, include, Multi-degree-of-freedom motion platform; A mesh plate is connected to the multi-degree-of-freedom motion platform. The mesh plate is provided with a receiving groove, and the bottom of the receiving groove is arrayed with multiple mesh holes. A scraper assembly includes a scraper drive mechanism, a connecting plate, and a scraper rotatably connected to the connecting plate. The scraper is positioned above the receiving groove. The scraper drive mechanism drives the connecting plate to move up and down, causing the scraper to move closer to or away from the mesh plate.

2. The battery cell front and back printing apparatus according to claim 1, characterized in that, It also includes a support frame and a lifting mechanism for driving the support frame to rise and fall. The multi-degree-of-freedom motion platform and the scraper assembly are both connected to the support frame.

3. The battery cell front and back printing apparatus according to claim 2, characterized in that, It also includes a lateral movement mechanism disposed on the bracket, which drives the scraper assembly to move in the horizontal direction.

4. The battery cell front and back printing apparatus according to claim 2, characterized in that, It also includes a locking mechanism disposed on the multi-degree-of-freedom motion platform. The locking mechanism includes a first drive cylinder and a conical lock head. The mesh plate is provided with a conical positioning hole. The first drive cylinder drives the conical lock head to insert into the conical positioning hole.

5. The battery cell front and back printing apparatus according to claim 2, characterized in that, It also includes a push block and a second drive cylinder for driving the push block to rise and fall. The push block is located below the bracket, and the second drive cylinder drives the push block to push the bracket to rise.

6. The battery cell front and back printing apparatus according to claim 2, characterized in that, The bracket is provided with a guide rail, and the scraper assembly is slidably connected to the guide rail.

7. The battery cell front and back printing apparatus according to claim 1, characterized in that, The bottom of both sides of the multi-degree-of-freedom motion platform is provided with sliding grooves, and the two ends of the mesh plate are respectively slidably disposed in the sliding grooves on both sides, and the bottom of the sliding grooves supports the mesh plate.

8. The battery cell front and back printing apparatus according to claim 1, characterized in that, The scraper assembly includes two sets of scraper units, each consisting of a scraper, a scraper drive mechanism, and a connecting plate, and the two sets of scraper units are arranged symmetrically.

9. The battery cell front and back printing apparatus according to claim 1, characterized in that, The multi-degree-of-freedom motion platform is provided with a clearance opening, the scraper assembly is located directly above the clearance opening, and the mesh plate is located directly below the clearance opening.

10. A battery cell front and back printing apparatus according to claim 1, characterized in that, The scraper drive mechanism includes a ball screw assembly and a third drive cylinder. The ball screw assembly drives the third drive cylinder to rise and fall, and the third drive cylinder drives the connecting plate to move so that the scraper abuts against the mesh plate.

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