Solder strip preparation device for releasing welding stress of battery piece

Abstract

The utility model relates to the technical field of solder strip preparation, in particular to a solder strip preparation device for releasing welding stress of a battery piece, which comprises a base for equipment installation; the bending mechanism is used for extruding and bending a welding strip, the bending mechanism is arranged on the base, the bending mechanism comprises a bending rack, a bending power part, an upper pressing plate and a lower pressing plate, the bending rack is arranged on the base, the lower pressing plate is fixedly connected with the bending rack, the bending power part is fixedly connected with the bending rack, and the upper pressing plate and the lower pressing plate are arranged on the base. The output end of the bending power piece is fixedly connected with the upper pressing plate, a plurality of extrusion protrusions are formed on the top face of the lower pressing plate in a protruding mode, and extrusion grooves are formed in the bottom face of the upper pressing plate in a sunken mode. The problem of battery piece warping caused by welding strip warping deformation is solved.

Description

Technical Field

[0001] This utility model relates to the field of welding strip preparation technology, and in particular to a welding strip preparation device for relieving welding stress in battery cells. Background Technology

[0002] BC solar cells, short for "full back contact (full reverse electrode contact) crystalline silicon photovoltaic cells," are welded to solder ribbons using infrared welding. This involves overall heating, and upon cooling, the solder ribbons experience shrinkage, causing the cells to warp. Because BC cells have a single-sided solder ribbon structure, this problem is particularly prevalent. Therefore, before stringing, the flat solder ribbons need to be processed into a textured structure, with a raised or recessed area between adjacent welding points. However, existing equipment has low fabrication efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to overcome the problem that the existing equipment has low preparation efficiency, it is necessary to process the straight welding strip into a concave-convex structure before string welding, and there is a concave-convex structure between two adjacent welding points. Therefore, this utility model provides a welding strip preparation device for releasing welding stress in battery cells.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a welding strip preparation device for releasing welding stress in battery cells, comprising:

[0005] Base, used for equipment mounting;

[0006] The system includes a bending mechanism for extruding and bending the welding strip. The bending mechanism is mounted on a base and comprises a bending frame, a bending power component, an upper pressure plate, and a lower pressure plate. The bending frame is fixedly connected to the lower pressure plate, and the bending power component is also fixedly connected to the bending frame. The output end of the bending power component is fixedly connected to the upper pressure plate. The bending power component provides power to move the upper pressure plate closer to or further away from the lower pressure plate. Several extrusion protrusions are formed on the top surface of the lower pressure plate, and extrusion grooves matching the extrusion protrusions are formed on the bottom surface of the upper pressure plate. When the upper and lower pressure plates are closed, they extrude the straight welding strip into a concave-convex welding strip. The design of the bending mechanism transforms the straight welding strip into a welding strip with a concave-convex structure, solving the problem of cell warping caused by welding strip warping. The welding strip with a concave-convex structure has a certain shrinkage allowance, which reduces or even eliminates the impact of welding strip shrinkage on the cell after the welding strip is welded onto the cell.

[0007] To address the issue of the fixed and unadjustable position of the bending mechanism, the system further includes an adjustable guide rail on the base. The bending mechanism comprises a bending drive and a bending slider that matches the adjustable guide rail. The bending slider and the adjustable guide rail are slidably connected, the bending slider and the bending frame are fixedly connected, the bending drive and the base are fixedly connected, and the output end of the bending drive is drivenly connected to the bending frame. The bending drive provides power for the movement of the bending frame.

[0008] To address the issue of low automation in existing equipment where the solder strip needs to be cut to match the solar cells, the solder strip preparation device further includes a cutting mechanism for cutting the solder strip. The cutting mechanism is mounted on a base and includes a cutting frame, an upper cutting power component, an upper mounting base, an upper cutting blade, a lower cutting power component, a lower mounting base, and a lower cutting blade. The cutting frame and the base are fixedly connected.

[0009] The upper cutting power unit is fixedly connected to the cutting machine frame, the output end of the upper cutting power unit is fixedly connected to the upper mounting base, and the upper cutting blade is fixedly connected to the upper mounting base. The upper cutting power unit is used to provide power for the upper cutting blade to move closer to or further away from the lower cutting blade.

[0010] The lower cutting power unit is fixedly connected to the cutting machine frame, the output end of the lower cutting power unit is fixedly connected to the lower mounting base, the lower cutting blade is fixedly connected to the lower mounting base, and the lower cutting power unit is used to provide power for the lower cutting blade to move closer to or further away from the upper cutting blade.

[0011] To address the issue of low movement stability of the upper and lower mounting bases, the system further includes a sliding connection between the upper mounting base and the cutting frame, a sliding connection between the lower mounting base and the cutting frame, a guide rail on the cutting frame, an upper guide slider matching the guide rail on the upper mounting base, and a sliding connection between the upper guide slider and the guide rail. Similarly, a lower guide slider matching the guide rail is arranged on the lower mounting base, and the lower guide slider is also slidingly connected to the guide rail.

[0012] To address the issue that bending of the welding strip after passing through the bending mechanism affects the spacing between the two connected concave and convex structures formed after processing, thus affecting stress release, the welding strip preparation device further includes two tensioning mechanisms, with the bending mechanism arranged between the two tensioning mechanisms. The tensioning mechanisms clamp the welding strip, ensuring that the welding strip located at the bending mechanism is in a taut state.

[0013] The tensioning mechanism further includes a tensioning frame, a lower clamping plate, a tensioning power component, a connecting plate, and several upper clamping blocks. The tensioning frame is arranged on the base, the lower clamping plate is fixedly connected to the tensioning frame, the tensioning power component is fixedly connected to the tensioning frame, the output end of the tensioning power component is fixedly connected to the connecting plate, and the upper clamping blocks are arranged on the connecting plate. The tensioning power component is used to provide power for the upper clamping blocks to move away from or closer to the lower clamping blocks.

[0014] To address the problem of over-clamping of the welding strip due to the direct connection between the upper clamping block and the tensioning power component, which can lead to welding strip deformation or even breakage, a further tensioning mechanism is included, comprising a connecting shaft and a buffer element. The connecting shaft corresponds one-to-one with the upper clamping block, the connecting shaft is slidably connected to the connecting plate, and the bottom end of the connecting shaft is fixedly connected to the upper clamping block. The buffer element corresponds one-to-one with the connecting shaft, and the buffer element is sleeved on its corresponding connecting shaft. One end of the buffer element abuts against the connecting plate, and the other end abuts against the upper clamping block.

[0015] To address the issue of the fixed and unadjustable position of the tensioning mechanism, the mechanism further includes a tensioning slider that matches the adjusting slide rail and a tensioning drive component. The tensioning drive component is fixedly connected to the base, and the output end of the tensioning drive component is fixedly connected to the tensioning frame. The tensioning drive component provides power for the movement of the tensioning frame, and the tensioning slider is slidably connected to the adjusting guide rail.

[0016] Furthermore, the positions of the extrusion protrusions and the extrusion grooves can be interchanged.

[0017] The beneficial effects of this utility model are: The battery cell welding strip preparation device provided by this utility model for releasing welding stress, through the design of the bending mechanism, transforms the straight welding strip after the bending mechanism into a welding strip with a concave and convex structure, which solves the problem of battery cell warping caused by welding strip warping deformation. The welding strip with concave and convex structure has a certain shrinkage allowance. After the welding strip is welded onto the battery cell, the effect of welding strip shrinkage on the battery cell can be reduced or even eliminated. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 This is a utility model Figure 1 Enlarged structural diagram at point A;

[0021] Figure 3 This is a utility model Figure 1 Enlarged structural diagram at point B;

[0022] Figure 4 This is a utility model Figure 2 Enlarged structural diagram at point C;

[0023] Figure 5 This is a front view structural diagram of the present invention;

[0024] Figure 6 This is a utility model Figure 5 A magnified structural diagram at point D.

[0025] In the diagram: 1. Base; 11. Adjustment rail;

[0026] 2. Bending mechanism; 21. Bending frame; 22. Bending power component; 23. Upper pressure plate; 231. Extrusion groove; 24. Lower pressure plate; 241. Extrusion protrusion; 25. Bending slider; 26. Bending drive component.

[0027] 3. Cutting mechanism; 31. Cutting frame; 32. Upper cutting power unit; 33. Upper mounting base; 331. Upper guide slider; 34. Upper cutting blade; 35. Lower cutting power unit; 36. Lower mounting base; 361. Lower guide slider; 37. Lower cutting blade; 38. Guide rail.

[0028] 4. Tensioning mechanism; 41. Tensioning frame; 42. Lower clamping plate; 43. Tensioning power component; 44. Connecting plate; 45. Upper clamping block; 46. Connecting shaft; 47. Buffer element; 48. Tensioning slider; 49. Tensioning drive component. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0030] like Figure 1 This is a schematic diagram of the structure of this utility model, a welding strip preparation device for relieving welding stress in battery cells, comprising:

[0031] Base 1, used for equipment installation;

[0032] like Figure 2 , Figure 4As shown, the bending mechanism 2 is used for extruding and bending welding strip. The bending mechanism 2 is arranged on the base 1 and includes a bending frame 21, a bending power component 22, an upper pressure plate 23, and a lower pressure plate 24. The bending frame 21 is arranged on the base 1, and the lower pressure plate 24 is fixedly connected to the bending frame 21. The bending power component 22 is fixedly connected to the bending frame 21, and the output end of the bending power component 22 is fixedly connected to the upper pressure plate 23. The bending power component 22 is used to provide power for the upper pressure plate 23 to move closer to or further away from the lower pressure plate 24. Several extrusion protrusions are formed on the top surface of the lower pressure plate 24. 241. An extrusion groove 231 matching the extrusion protrusion 241 is formed on the bottom surface of the upper pressure plate 23. When the upper pressure plate 23 and the lower pressure plate 24 are closed, the upper pressure plate 23 and the lower pressure plate 24 will extrude the straight welding strip into a concave-convex welding strip. Through the design of the bending mechanism 2, the straight welding strip after passing through the bending mechanism 2 is transformed into a welding strip with a concave-convex structure, which solves the problem of cell warping caused by welding strip warping deformation. The welding strip with a concave-convex structure has a certain shrinkage allowance. After the welding strip is welded onto the cell, it can reduce or even eliminate the impact of welding strip shrinkage on the cell. When the welding strip moves between the upper pressure plate 23 and the lower pressure plate 24, the bending power component 22 is activated, causing the upper pressure plate 23 to move closer to the lower pressure plate 24. The upper pressure plate 23 and the lower pressure plate 24 close and clamp the welding strip, so that the welding strip deformation has a concave-convex structure.

[0033] The bending power component 22 can be a power element such as a cylinder, hydraulic cylinder, electric actuator or lead screw transmission mechanism, and this application preferably uses a cylinder.

[0034] In another embodiment, the positions of the extrusion protrusion 241 and the extrusion groove 231 can be interchanged, that is, the extrusion groove 231 is arranged on the lower pressure plate 24, and the extrusion protrusion 241 is arranged on the upper pressure plate 23.

[0035] like Figure 2 As shown, the base 1 has an adjusting guide rail 11, and the bending mechanism 2 includes a bending drive component 26 and a bending slider 25 that matches the adjusting guide rail. The bending slider 25 and the adjusting guide rail 11 are slidably connected, the bending slider 25 and the bending frame 21 are fixedly connected, the bending drive component 26 and the base 1 are fixedly connected, and the output end of the bending drive component 26 is connected to the bending frame 21 for transmission. The bending drive component 26 is used to provide power for the movement of the bending frame 21. The bending drive component 26 can be a power element such as a cylinder, hydraulic cylinder, electric actuator or screw drive mechanism. In this application, a screw drive mechanism is preferred.

[0036] In another embodiment, the output end of the bending drive 26 is fixedly connected to the bending frame 21.

[0037] like Figure 1 , Figure 3 , Figure 6As shown, the welding strip preparation device includes a cutting mechanism 3 for cutting the welding strip. The cutting mechanism 3 is arranged on the base 1 and includes a cutting frame 31, an upper cutting power component 32, an upper mounting base 33, an upper cutting blade 34, a lower cutting power component 35, a lower mounting base 36, and a lower cutting blade 367. The cutting frame 31 and the base 1 are fixedly connected.

[0038] The upper cutting power unit 32 is fixedly connected to the cutting frame 31. The output end of the upper cutting power unit 32 is fixedly connected to the upper mounting base 33. The upper cutting blade 34 is fixedly connected to the upper mounting base 33. The upper cutting power unit 32 is used to provide power for the upper cutting blade 34 to move closer to or further away from the lower cutting blade 367. The upper cutting power unit 32 can be a power element such as a cylinder, hydraulic cylinder, electric push rod or lead screw transmission mechanism. In this application, a cylinder is preferred.

[0039] The lower cutting power component 35 is fixedly connected to the cutting frame 31. The output end of the lower cutting power component 35 is fixedly connected to the lower mounting base 36. The lower cutting blade 367 is fixedly connected to the lower mounting base 36. The lower cutting power component 35 is used to provide power for the lower cutting blade 367 to move closer to or further away from the upper cutting blade 34. The lower cutting power component 35 can be a power element such as a cylinder, hydraulic cylinder, electric push rod or lead screw transmission mechanism. In this application, a cylinder is preferred.

[0040] The upper mounting base 33 and the cutting machine frame 31 are slidably connected, and the lower mounting base 36 and the cutting machine frame 31 are slidably connected. The cutting machine frame 31 is provided with a guide rail 38, and the upper mounting base 33 is provided with an upper guide slider 331 that matches the guide rail 38. The upper guide slider 331 and the guide rail 38 are slidably connected. The lower mounting base 36 is provided with a lower guide slider 361 that matches the guide rail 38. The lower guide slider 361 and the guide rail 38 are slidably connected.

[0041] like Figure 2 , Figure 3 As shown, the welding strip preparation device includes two tensioning mechanisms 4 and a bending mechanism 2 arranged between the two tensioning mechanisms 4. The tensioning mechanisms 4 clamp the welding strip so that the welding strip located at the bending mechanism 2 is in a tensioned state.

[0042] The tensioning mechanism 4 includes a tensioning frame 41, a lower clamping plate 42, a tensioning power component 43, a connecting plate 44, and several upper clamping blocks 45. The tensioning frame 41 is arranged on the base 1. The lower clamping plate 42 is fixedly connected to the tensioning frame 41. The tensioning power component 43 is fixedly connected to the tensioning frame 41. The output end of the tensioning power component 43 is fixedly connected to the connecting plate 44. The upper clamping blocks 45 are arranged on the connecting plate 44. The tensioning power component 43 is used to provide power for the upper clamping blocks 45 to move away from or closer to the lower clamping blocks. The tensioning power component 43 can be a power element such as a cylinder, a hydraulic cylinder, an electric actuator, or a lead screw transmission mechanism. In this application, a cylinder is preferred.

[0043] The tensioning mechanism 4 includes a connecting shaft 46 and a buffer element 47. The connecting shaft 46 corresponds to an upper clamping block 45, and the connecting shaft 46 is slidably connected to a connecting plate 44. The bottom end of the connecting shaft 46 is fixedly connected to the upper clamping block 45. The buffer element 47 corresponds to a connecting shaft 46, and is sleeved on its corresponding connecting shaft 46. One end of the buffer element 47 abuts against the connecting plate 44, and the other end abuts against the upper clamping block 45. The buffer element 47 is a steel coil spring or a rubber spring, etc. Through the design of the connecting shaft 46 and the buffer element 47, the buffer element 47 can control the clamping force of the welding strip, preventing the tensioning mechanism from excessively clamping the welding strip.

[0044] The tensioning mechanism 4 includes a tensioning slider 48 that matches the adjusting slide rail and a tensioning drive 49. The tensioning drive 49 is fixedly connected to the base 1, and the output end of the tensioning drive 49 is fixedly connected to the tensioning frame 41. The tensioning drive 49 is used to provide power for the movement of the tensioning frame 41. The tensioning slider 48 is slidably connected to the adjusting guide rail 11. The tensioning drive 49 can be a power element such as a cylinder, hydraulic cylinder, electric actuator, or screw drive mechanism. In this application, a screw drive mechanism is preferred.

[0045] In another embodiment, the output end of the tensioning drive 49 is fixedly connected to the tensioning frame 41.

[0046] In use, the welding strip is conveyed to the welding strip preparation device via a transfer roller and passes between the upper clamping block 45 and the lower clamping plate 42, and between the upper pressure plate 23 and the lower pressure plate 24. Two tensioning mechanisms 4 clamp the welding strip, causing it to be taut at the bending mechanism 2. Specifically, the tensioning power component 43 is activated, causing the upper clamping block 45 to descend. With the cooperation of the lower clamping block 42, the upper clamping block 45 and the welding strip are aligned one-to-one, with the upper clamping block 45 and the lower clamping block 43 clamping their respective welding strips. When the welding strip is taut... Immediately afterwards, the bending power component 22 is activated, causing the upper pressure plate 23 to approach the lower pressure plate 24. The upper pressure plate 23 and the lower pressure plate 24 close and clamp the welding strip, causing the welding strip to deform into a concave-convex structure. After processing, the welding strip continues to be conveyed to the cutting mechanism 3 and is located between the upper cutting blade 34 and the lower cutting blade 367. After outputting the specified length, the upper cutting power component 32 and the lower cutting power component 35 are activated, causing the upper cutting blade 34 and the lower cutting blade 367 to approach each other to cut the welding strip and segment it.

[0047] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A welding strip preparation apparatus for relieving welding stress in battery cells, characterized in that, include: Base (1), for equipment installation; The bending mechanism (2) is used for extruding and bending the welding strip. The bending mechanism (2) is arranged on the base (1). The bending mechanism (2) includes a bending frame (21), a bending power component (22), an upper pressure plate (23), and a lower pressure plate (24). The bending frame (21) is arranged on the base (1). The lower pressure plate (24) is fixedly connected to the bending frame (21). The bending power component (22) is fixedly connected to the bending frame (21). The output end of the bending power component (22) is connected to the upper pressure plate. The plate (23) is fixedly connected. The bending power component (22) is used to provide power for the upper pressure plate (23) to move closer to or away from the lower pressure plate (24). The lower pressure plate (24) has a plurality of extrusion protrusions (241) protruding on its top surface. The upper pressure plate (23) has an extrusion groove (231) that matches the extrusion protrusions (241) recessed on its bottom surface. When the upper pressure plate (23) and the lower pressure plate (24) are closed, the upper pressure plate (23) and the lower pressure plate (24) will extrude the straight welding strip to form a concave-convex welding strip.

2. The electrode strip preparation apparatus for relieving welding stress in battery cells as described in claim 1, characterized in that: The base (1) has an adjusting guide rail (11), and the bending mechanism (2) includes a bending drive (26) and a bending slider (25) that matches the adjusting guide rail. The bending slider (25) and the adjusting guide rail (11) are slidably connected. The bending slider (25) and the bending frame (21) are fixedly connected. The bending drive (26) and the base (1) are fixedly connected. The output end of the bending drive (26) is drivenly connected to the bending frame (21). The bending drive (26) is used to provide power for the movement of the bending frame (21).

3. The electrode preparation apparatus for relieving welding stress in battery cells as described in claim 1, characterized in that: The welding strip preparation device includes a cutting mechanism (3) for cutting the welding strip. The cutting mechanism (3) is arranged on a base (1). The cutting mechanism (3) includes a cutting frame (31), an upper cutting power component (32), an upper mounting base (33), an upper cutting blade (34), a lower cutting power component (35), a lower mounting base (36), and a lower cutting blade (367). The cutting frame (31) and the base (1) are fixedly connected. The upper cutting power unit (32) and the cutting frame (31) are fixedly connected. The output end of the upper cutting power unit (32) and the upper mounting base (33) are fixedly connected. The upper cutting blade (34) and the upper mounting base (33) are fixedly connected. The upper cutting power unit (32) is used to provide power for the upper cutting blade (34) to move closer to or further away from the lower cutting blade (367). The lower cutting power unit (35) and the cutting frame (31) are fixedly connected. The output end of the lower cutting power unit (35) and the lower mounting base (36) are fixedly connected. The lower cutting blade (367) and the lower mounting base (36) are fixedly connected. The lower cutting power unit (35) is used to provide power for the lower cutting blade (367) to move closer to or away from the upper cutting blade (34).

4. The electrode strip preparation apparatus for relieving welding stress in a battery cell as described in claim 3, characterized in that: The upper mounting base (33) and the cutting frame (31) are slidably connected, the lower mounting base (36) and the cutting frame (31) are slidably connected, the cutting frame (31) is provided with a guide rail (38), the upper mounting base (33) is provided with an upper guide slider (331) that matches the guide rail (38), the upper guide slider (331) and the guide rail (38) are slidably connected, the lower mounting base (36) is provided with a lower guide slider (361) that matches the guide rail (38), the lower guide slider (361) and the guide rail (38) are slidably connected.

5. The electrode strip preparation apparatus for relieving welding stress in battery cells as described in claim 2, characterized in that: The welding strip preparation device includes two tensioning mechanisms (4), and the bending mechanism (2) is arranged between the two tensioning mechanisms (4). The tensioning mechanism (4) clamps the welding strip so that the welding strip located at the bending mechanism (2) is in a tensioned state.

6. The electrode strip preparation apparatus for relieving welding stress in a battery cell as described in claim 5, characterized in that: The tensioning mechanism (4) includes a tensioning frame (41), a lower clamping plate (42), a tensioning power component (43), a connecting plate (44), and several upper clamping blocks (45). The tensioning frame (41) is arranged on the base (1). The lower clamping plate (42) is fixedly connected to the tensioning frame (41). The tensioning power component (43) is fixedly connected to the tensioning frame (41). The output end of the tensioning power component (43) is fixedly connected to the connecting plate (44). The upper clamping blocks (45) are arranged on the connecting plate (44). The tensioning power component (43) is used to provide power for the upper clamping blocks (45) to move away from or closer to the lower clamping blocks.

7. The electrode strip preparation apparatus for relieving welding stress in a battery cell as described in claim 6, characterized in that: The tensioning mechanism (4) includes a connecting shaft (46) and a buffer element (47). The connecting shaft (46) and the upper clamping block (45) correspond one-to-one. The connecting shaft (46) and the connecting plate (44) are slidably connected. The bottom end of the connecting shaft (46) and the upper clamping block (45) are fixedly connected. The buffer element (47) and the connecting shaft (46) correspond one-to-one. The buffer element (47) is sleeved on its corresponding connecting shaft (46). One end of the buffer element (47) abuts against the connecting plate (44), and the other end abuts against the upper clamping block (45).

8. The electrode preparation apparatus for relieving welding stress in a battery cell as described in claim 6, characterized in that: The tensioning mechanism (4) includes a tensioning slider (48) that matches the adjusting slide rail and a tensioning drive (49). The tensioning drive (49) is fixedly connected to the base (1). The output end of the tensioning drive (49) is fixedly connected to the tensioning frame (41). The tensioning drive (49) is used to provide power for the movement of the tensioning frame (41). The tensioning slider (48) is slidably connected to the adjusting guide rail (11).

9. The electrode preparation apparatus for relieving welding stress in a battery cell as described in claim 1, characterized in that: The positions of the extrusion protrusion (241) and the extrusion groove (231) can be interchanged.

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