Front-pass welding strip processing mechanism and compatible battery string step-by-step complete machine
By using a compatible step-by-step battery string welding machine, and by employing a welding strip head and a flipping mechanism, the problems of low welding efficiency and warping of BC battery cells were solved, achieving efficient and low-cost battery cell welding and ensuring product quality.
Patent Information
- Application Number
- CN202422526046.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-10-18
AI Technical Summary
Existing string welding machines are inefficient, have complex structures, and are costly when welding BC solar cells, and cell warping issues affect product quality.
The machine adopts a step-by-step design compatible with battery strings, including a front-end solder strip processing mechanism and a battery cell processing mechanism. It uses two solder strip pulling heads to control the movement of different groups of solder strips, and adjusts the position of the battery cells through a flipping mechanism. Combined with an ultraviolet curing mechanism, it ensures the welding quality.
It improves the welding efficiency of battery cells of different specifications, reduces equipment costs, prevents warping problems, and ensures controllable product quality before lamination.
Smart Images
Figure CN223572253U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of battery string processing, and in particular to a front-end welding strip processing mechanism and a step-by-step complete machine compatible with battery strings. Background Technology
[0002] In photovoltaic modules, the number of busbars in a solar cell is a major factor determining the cell's manufacturing process. SMBB cells are common types of cells with an extremely high number of busbars, and mainstream stringing machines are designed for these cells.
[0003] The existing BC solar cell is a novel zero-busbar solar cell. The BC solar cell has no main grid lines on the front; all main grid lines are located on the back. The back of the BC solar cell has A-group and B-group grid lines, which are arranged alternately. A-group solder ribbons need to be soldered onto A-group grid lines, and B-group solder ribbons need to be soldered onto B-group grid lines. However, in the existing stringing process, a conventional stringing machine consists of a head and a tail on one side. The head contains two sets of ribbon feeding and solder ribbon traction mechanisms, which alternately traction the A and B groups of solder ribbons. Each head needs to work repeatedly, resulting in low efficiency. This structure makes the conventional stringing machine head complex and expensive.
[0004] Meanwhile, in the existing cell processing technology, the cells are directly connected to the welding strip, which can easily cause cell warping during the welding process, affecting subsequent product processing. Utility Model Content
[0005] Purpose of the invention: The purpose of this utility model is to provide a compatible battery string split-type complete machine, which solves the problem of inconvenient welding of solder strips in battery cells of different specifications in the prior art.
[0006] Technical solution
[0007] A front-end solder strip processing mechanism includes a body, which includes a solder strip tray, a solder strip pressure plate, and a guide mechanism for moving the solder strip of the battery cell arranged in sequence. The guide mechanism has two solder strip pulling heads on both sides, and the two solder strip pulling heads are located on the same straight line.
[0008] Preferably, the guide mechanism is equipped with an ultraviolet curing mechanism.
[0009] A compatible battery string step-by-step assembly includes a front-end solder strip processing mechanism and a front-end cell processing mechanism. The front-end cell processing mechanism and the front-end solder strip processing mechanism are connected to an installation platform. A middle-end transfer mechanism is connected to one side of the installation platform of the front-end cell processing mechanism. A cell flipping mechanism for flipping the cells is provided between the middle-end transfer mechanism and the front-end cell processing mechanism.
[0010] Preferably, a handling robot for transporting battery cells is provided between the front-end cell processing mechanism and the guiding mechanism.
[0011] Preferably, the flipping mechanism includes a movable frame with a rotating shaft mounted on it. The rotating shaft is connected to a flipping plate for flipping the battery cells, and the flipping plate is located above the intermediate transmission mechanism.
[0012] Preferably, the mounting platform is provided with a track platform, and the movable frame and the track platform are slidably connected.
[0013] Preferably, the front-end cell processing mechanism includes a material box and a conveyor belt, the handling robot is located on one side of the conveyor belt, and the cell flipping mechanism is located between the middle-end conveyor mechanism and the conveyor belt.
[0014] Preferably, a glue-applying mechanism and a vision mechanism are provided above the conveyor belt.
[0015] Preferably, a battery cell unloading mechanism is provided between the middle conveying mechanism and the guiding mechanism.
[0016] Beneficial effects: The front-end ribbon handling mechanism uses two ribbon pulling heads to control the movement of different groups of ribbons, which can adapt to solar cells with different processes, making it highly applicable and compatible; the flipping mechanism controls the adjustment of different types of solar cells during the transfer process, making it easier for the solar cells to proceed to the next processing step after welding, thus improving work efficiency; applying adhesive and curing it on the solar cells before welding the ribbons effectively improves the warping problem of BC solar cell strings; it can prevent insufficient tensile strength between the solar cells and ribbons caused by poor welding; it achieves preliminary electrical connection, and EL testing can be performed before lamination, ensuring controllable product quality before lamination. Attached Figure Description
[0017] Figure 1 This is a top view of the overall structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the front-end battery cell processing structure of this utility model;
[0019] Figure 3 This is a schematic diagram of the flipping mechanism of this utility model;
[0020] Figure 4 This is a schematic diagram of the overall structure of the welding strip head of this utility model.
[0021] Reference numerals: 11. Front-end cell processing mechanism; 12. Front-end ribbon processing mechanism; 13. Middle-end transfer mechanism; 14. Rear-end welding mechanism; 21. Cell unloading mechanism; 22. UV curing mechanism; 23. Handling robot; 24. Conveyor belt; 25. Vision mechanism; 26. Cell flipping mechanism; 27. Mounting platform; 28. Cell material box; 29. Glue application mechanism; 31. Track platform; 32. Movable frame; 33. Flipping plate; 34. Rotating shaft; 41. Ribbon tray; 42. Ribbon pressure plate; 43. Ribbon pulling head; 44. Ribbon guiding mechanism. Detailed Implementation
[0022] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Example
[0023] like Figure 1 As shown, a battery string split-type assembly includes a front-end cell processing mechanism 11, a front-end ribbon processing mechanism 12, a middle-end transfer mechanism 13, and a rear-end welding mechanism 14. The front-end cell processing mechanism 11 and the front-end ribbon processing mechanism 12 are arranged side by side. This application also includes a mounting platform 27, on which both the front-end cell processing mechanism 11 and the front-end ribbon processing mechanism 12 are mounted.
[0024] like Figure 2 As shown, the front-end cell processing mechanism 11 includes a material box 28 and a conveyor belt 24. The material box 28 is located at the far end and is used to place the cells. The conveyor belt 24 is located on one side of the material box 28, and the other end of the conveyor belt 24 is close to the middle-end conveyor mechanism 13. The conveyor belt 24 is used to transport the cells to be processed. There is a module transport mechanism between the conveyor belt 24 and the material box 28. The mechanical claw of the module transport mechanism is lowered by a cylinder. After being lowered, it grabs the cell, adjusts it, and places it on the conveyor belt 24, which then moves along the conveyor belt 24.
[0025] The mounting platform 27 is equipped with a glue application mechanism 29 above the conveyor belt 24. When the solar cell moves on the conveyor belt 24 to the bottom of the glue application mechanism 29, the glue application mechanism 29 starts to work. The glue application screen descends, and the glue scraper moves back and forth on the steel mesh to apply UV glue to the solar cell through the holes of the steel mesh (the holes of the steel mesh correspond one-to-one with the grid lines of the solar cell). After the application is completed, the glue application screen rises, and then the conveyor belt 24 continues to drive the solar cell to move.
[0026] A vision mechanism 25 is provided at the other end of the conveyor belt 24. The vision mechanism 25 is located above the conveyor belt 24. The vision mechanism 25 judges the appearance and position information of the battery cells through intelligent vision recognition, which facilitates subsequent processing.
[0027] The front-end welding strip processing mechanism 12 includes a welding strip tray 41, a welding strip pressure plate 42, and a welding strip pulling head 43 arranged in sequence. The welding strip tray 41 is set according to the number of grid lines of the battery cell, and the two correspond one-to-one. The welding strip tray 31 is mounted on a motor for easy rotation and feeding. After the welding strip is fed through the welding strip tray 31, it is first immersed in flux for casting and welding before being transferred to the welding strip pressure plate 42, where it is squeezed into a flat shape by rollers for subsequent processing.
[0028] The welding strip pulling head 43, located on one side of the welding strip pressure plate 42, includes small grippers. The number of small grippers is the same as the number of welding strips, and they are used to grip the welding strips one by one. After the small grippers grip the welding strips, they drag the welding strips a certain distance and then cut the welding strips through the cutting mechanism.
[0029] After the welding strip is cut, it needs to be connected to the solar cell. The mounting platform 27 is equipped with a transport robot 23 between the front-end solar cell processing mechanism 11 and the front-end welding strip processing mechanism 12. The transport robot 23 is located on one side of the vision mechanism 25 in the front-end solar cell processing mechanism 11. The transport robot 23 will transport the solar cell identified by the vision mechanism 25 to the bottom of the welding strip machine head 43. The welding strip machine head 43 controls the cut welding strip to move and descend at the same time, and places the welding strip on the solar cell.
[0030] like Figure 4 As shown, in order to adapt to the dual grid lines of BC solar cells, it is necessary to control the two grid lines to be transported separately. Therefore, there are two welding strip heads 43, and the two welding strip heads 43 are installed on a straight line. Both large welding strip heads 43 are equipped with independent movable brackets. One welding strip head 43 is located on the upper side, and the other welding strip head 43 is located on the lower side. At the same time, the welding strip head 43 is also connected to the mounting bracket with an up and down movable mechanism to facilitate the adjustment of the welding strip position and contact with the solar cell.
[0031] Two welding strip pulling heads 43 are arranged back and forth along the welding strip processing direction to facilitate the movement of the welding strip in a staggered manner. A welding strip guiding mechanism 44 is provided below the two welding strip pulling heads 43. The lower welding strip pulling head 43 moves to the top of the welding strip guiding mechanism 44 through an up-and-down sliding movable mechanism, thereby controlling the contact between the welding strip and the welding strip guiding mechanism 44. The cut welding strip moves along the welding strip guiding mechanism 44 to the battery cell, so that the welding strip can accurately correspond to the grid line position.
[0032] Meanwhile, an ultraviolet curing mechanism 22 is provided below the welding strip drawing head 43 and the welding strip guiding mechanism. The handling robot 23 places the battery cell on the ultraviolet curing mechanism 22. The welding strip moves to the battery cell through the welding strip guiding mechanism. The curing platform of the ultraviolet curing mechanism 22 is equipped with a curing lamp source and a welding strip pressing mechanism. During operation, the curing lamp source and the welding strip pressing mechanism descend simultaneously. The welding strip pressing mechanism presses each welding strip to ensure that each welding strip is pressed tightly on the surface of the battery cell. After the curing lamp source is lit, the UV adhesive will cure.
[0033] To ensure compatibility between conventional cell welding and BC cell welding processes, and to control both types of cells to move to the next workstation on the same transmission line to reduce errors, a cell unloading mechanism 21 is provided between the intermediate transmission mechanism 13 and the UV curing mechanism 22. When the cell unloading mechanism 21 is in place, the Z-axis cylinder descends to grab the cured cell with the weld strip and transport it to different workstations.
[0034] The intermediate conveying mechanism 13 will transfer the processed welding strip to the subsequent welding mechanism 14 for welding work.
[0035] If welding conventional battery strings, the cell unloading mechanism 21 will place the cured cells with solder ribbons directly onto the intermediate conveyor mechanism 13. The motor drives the conveyor belt to transport the cells to the next intelligent vision inspection station for photographing and judging the appearance and position information of the cells and solder ribbons. Since the welding is of conventional battery strings, the cells and solder ribbons are joined at the same position on both welding heads. The two robots in the subsequent process can take turns or pick up cells from either of the two intermediate conveyor belts and place them on the welding belt for welding.
[0036] If it is welding BC battery strings, the battery cell unloading and gripping mechanism 21 will place the solidified battery cell with the solder strip on the flipping mechanism 26. The cylinder of the flipping mechanism 26 rotates to flip the BC battery cell 180° and then moves it through the battery cell unloading and gripping mechanism 21 to place the BC battery cell on the middle conveying mechanism 13.
[0037] like Figure 3 As shown, the flipping mechanism 26 includes a track platform 31, which is mounted on the mounting platform 27 and located below the intermediate transfer mechanism 13. A movable frame 32 is slidably mounted on the track platform 31. A rotating shaft 34 is provided on the end face of the movable frame 32 facing the intermediate transfer mechanism 13. A flipping plate 33 is fixedly mounted on the rotating shaft 34 and is located at the center of the rotating shaft 34. The flipping plate 33 rotates around its own axis. The cell feeding and gripping mechanism 21 will place the cell on the flipping plate 33 and rotate it. After rotation, the cell is moved to the intermediate transfer mechanism 13 by the cell feeding and gripping mechanism 21 and then transferred to the subsequent welding mechanism 14 for operation.
[0038] A motor drives a conveyor belt to transport the battery cells to the next intelligent vision inspection station for photographing and judging the appearance and position information of the battery cells and welding ribbon. Because BC battery strings are being welded, the two welding heads weld the battery cells at different positions relative to the welding ribbon; that is, if one welding head welds the positive grid line, the other head can only weld the negative grid line. Therefore, the two robots in the subsequent process can only pick up the battery cells from the two intermediate conveyor belts in the order of positive and negative and place them onto the welding belt for welding.
[0039] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.
Claims
1. A front-end strip processing mechanism, characterized by: Including a body (10), the body (10) includes a solder strip material disc (41), a solder strip pressing disc (42) and a guide mechanism (44) for battery piece solder strip movement arranged in sequence, both sides of the guide mechanism (44) are provided with a solder strip pulling machine head (43), and the two solder strip pulling machine heads (43) are located on the same straight line.
2. A pre-welding strip processing mechanism according to claim 1, characterized in that: The guide mechanism (44) is provided with an ultraviolet lamp curing mechanism.
3. A compatible battery string step-up system, characterized by: The front-end solder strip processing mechanism and the front-end battery piece processing mechanism (11) are connected with a mounting table (27), one side of the mounting table (27) is connected with a middle-end transmission mechanism (13), and the middle-end transmission mechanism (13) and the front-end battery piece processing mechanism (11) are provided with a piece turning mechanism (26) for turning the battery piece.
4. A step-by-step battery compatible battery string integrator according to claim 3, wherein: The front-end battery piece processing mechanism (11) and the guide mechanism (44) are provided with a carrying robot (23) for carrying the battery piece.
5. A step-by-step battery compatible battery string integrator according to claim 3, wherein: The piece turning mechanism (26) comprises a movable frame (32), a rotating shaft (34) is installed on the movable frame (32), a turning plate (33) for turning the battery piece is connected with the rotating shaft (34), and the turning plate (33) is located above the middle-end transmission mechanism (13).
6. A step-by-step battery compatible battery string integrator according to claim 5, wherein: The mounting table (27) is provided with a track table (31), and the movable frame (32) and the track table (31) are in sliding connection.
7. A step-by-step battery compatible battery string integrator according to claim 4, wherein: The front-end battery piece processing mechanism (11) comprises a material box (28) and a transmission belt (24), the carrying robot (23) is located on one side of the transmission belt (24), and the piece turning mechanism (26) is located between the middle-end transmission mechanism (13) and the transmission belt (24).
8. A step-by-step battery compatible battery string integrator according to claim 7, wherein: The transmission belt (24) is provided with a glue brushing mechanism (29) and a visual mechanism (25) above.
9. The step-by-step battery compatible battery string integrator of claim 7, wherein: The middle-end transmission mechanism (13) and the guide mechanism (44) are provided with a battery piece discharging mechanism (21).