Tab guiding system

Abstract

The utility model discloses a tab guiding system, which comprises a guiding path, a tab guiding device, a tab guiding device, a tab guiding device, a tab guiding device and a tab guiding device, and is characterized in that a pole piece is conveyed on the guiding path and is provided with at least one tab; the unwinding shaft is arranged at one end of the guide path, and one end of the pole piece is wound on the unwinding shaft; the at least one tab flattening mechanism is arranged on the guide path; the tab flattening mechanism comprises a roller, a negative pressure mechanism, a moving mechanism and a guide part, through the application of the tab guiding system, the tab guiding system is suitable for battery manufacturing processes of thermal composite lamination, Z-shaped lamination, winding and unwinding and the like, the tab of a moving pole piece can be better guided and smoothed, and particularly, the tab can be better guided and smoothed when the moving mechanism drives the guiding piece to automatically adjust the position. And the negative pressure mechanism at the roller generates certain negative pressure adsorption on the pole piece, so that the risk of folding or tearing the pole lug is effectively avoided, and the production efficiency and the production quality are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a tab guiding system. Background Art

[0002] At present, in the manufacturing process of power lithium-ion batteries, the lithium battery core making process is more commonly involved, which is generally divided into lamination method or winding method. Preferably, hot composite lamination, Z-type lamination and winding and unwinding processes can be adopted.

[0003] When unwinding the pole piece, the existing technology still mainly adopts manual adjustment to achieve the limiting guidance of the pole piece and the pole ear, that is, the technician changes the position of one or more corresponding fixed pole ear guide plates through manual operation, so as to achieve adaptive guidance cooperation between the pole ear guide plate and the pole ear.

[0004] However, the above manual adjustment is not only time-consuming and labor-intensive, but also very likely to cause the position of the pole piece tab to shift after the pole piece is rewound due to factors such as changes in the unwinding direction, correction operations during the unwinding process, and reduction in the roll diameter during the unwinding process. This makes the position of the already adjusted pole piece guide plate still unreasonable, which can easily cause batches of pole pieces to fold or tear. In addition, moving the pole piece guide plate during the splicing process may also cause its position to change, thereby increasing the risk of the pole piece folding or tearing. Utility Model Content

[0005] In view of this, in order to solve the above problems, the purpose of the present invention is to provide a tab guiding system, comprising:

[0006] A guide path, on which a pole piece is conveyed, and the pole piece is provided with at least one pole lug;

[0007] an unwinding shaft, the unwinding shaft being arranged at one end of the guide path, and one end of the pole piece being wound on the unwinding shaft;

[0008] At least one tab smoothing mechanism, wherein the tab smoothing mechanism is arranged on the guide path;

[0009] Among them, the tab smoothing mechanism includes: a roller, a negative pressure mechanism, a moving mechanism and a guide member, the roller is rotatably arranged on the guide path, a plurality of adsorption holes are opened on the roller, the negative pressure mechanism is arranged in the roller, the negative pressure mechanism is used to generate adsorption force at the adsorption holes, the moving mechanism is arranged close to the roller, the moving end of the moving mechanism is connected to the guide member, the guide member has a guide surface, and the tab is movably arranged between the adsorption hole and the guide surface.

[0010] In another preferred embodiment, a plurality of the adsorption holes are arranged in a ring array around the outer circumference of one end of the roller, and the roller is rotatably arranged relative to the negative pressure mechanism.

[0011] In another preferred embodiment, the negative pressure mechanism has a negative pressure suction port, the negative pressure suction port is arranged in an arc shape, and the negative pressure suction port is arranged toward the guide surface.

[0012] In another preferred embodiment, the moving mechanism includes: a Y-axis rotating device, a Z-axis telescopic device and an X-axis telescopic device, the Y-axis rotating device, the Z-axis telescopic device and the X-axis telescopic device are connected in sequence, and the X-axis telescopic device is connected to the guide member.

[0013] In another preferred embodiment, the guide surface includes: a straight portion and an arc-shaped portion, the straight portion is arranged close to the roller, one end of the arc-shaped portion is connected to one end of the straight portion, and the other end of the arc-shaped portion is bent in a direction away from the pole piece.

[0014] In another preferred embodiment, it further comprises: a laser distance measuring device, wherein the laser distance measuring device is arranged between the unwinding shaft and the tab smoothing mechanism, and the laser distance measuring device is used to obtain the position of the pole piece.

[0015] In another preferred embodiment, it further comprises: a correction system, wherein the correction system is arranged on the guide path, and the pole piece is movably arranged to pass through the correction system.

[0016] In another preferred embodiment, the correction system is arranged between the tab smoothing mechanism and the unwinding shaft.

[0017] In another preferred embodiment, at least two tab smoothing mechanisms are arranged sequentially along the guide path.

[0018] In another preferred embodiment, the two tab smoothing mechanisms and the unwinding shaft are arranged in a 7-shape on the guide path.

[0019] Due to the adoption of the above technical solution, the present invention has the following positive effects compared with the prior art:

[0020] Through the application of the utility model, a tab guiding system suitable for battery manufacturing processes such as thermal composite lamination, Z-type lamination and winding and unwinding is provided, which can provide better guidance and smoothing of the tabs for the moving tabs. In particular, while the moving mechanism drives the guide to automatically adjust the position, the negative pressure mechanism at the roller can generate a certain negative pressure adsorption on the tab, effectively avoiding the risk of folding or tearing of the tabs, which is conducive to further improving production efficiency and production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an overall schematic diagram of a tab guide system of the present invention;

[0022] Figure 2 This is a partial schematic diagram of a tab guide system of the present invention;

[0023] Figure 3 This is a side schematic diagram of a tab guide system of the present invention;

[0024] Figure 4 This is a schematic diagram of a negative pressure mechanism of a tab guiding system of the present invention.

[0025] In the attached figure:

[0026] 1. Pole piece; 2. Tab; 3. Unwinding shaft; 4. Tab smoothing mechanism; 5. Roller; 6. Negative pressure mechanism; 7. Moving mechanism; 8. Guide; 9. Adsorption hole; 10. Negative pressure suction port; 11. Y-axis rotating device; 12. Z-axis telescopic device; 13. X-axis telescopic device; 14. Straight part; 15. Arc part; 16. Laser ranging device; 17. Correction system. DETAILED DESCRIPTION

[0027] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inside", "outside", "front", "back", "horizontal", and "vertical" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0029] like Figure 1 and Figure 2As shown, a preferred embodiment of a tab guiding system is shown, comprising: a guiding path, on which a pole piece 1 is conveyed, and at least one tab 2 is provided on the pole piece 1; a unwinding shaft 3, which is provided at one end of the guiding path, and one end of the pole piece 1 is wound on the unwinding shaft 3; at least one tab smoothing mechanism 4, which is provided on the guiding path; wherein the tab smoothing mechanism 4 comprises: a roller 5, a negative pressure mechanism 6, a moving mechanism 7 and a guide member 8, the roller 5 is rotatably provided on the guiding path, a plurality of adsorption holes 9 are provided on the roller 5, the negative pressure mechanism 6 is provided in the roller 5, the negative pressure mechanism 6 is used to generate adsorption force at the adsorption hole 9, the moving mechanism 7 is provided close to the roller 5, the moving end of the moving mechanism 7 is connected to the guide member 8, the guide member 8 has a guide surface, and the tab 2 is movably provided between the adsorption hole 9 and the guide surface. Furthermore, the above-mentioned guide path is the moving path of the pole piece 1. When the pole piece 1 moves over the roller at the corresponding roller 5, the negative pressure suction force generated by the negative pressure mechanism 6 acts on the side of the pole piece 1 close to the roller 5 through the adsorption hole 9, so that one side of the pole ear 2 at this location is appropriately fitted on the surface of the roller 5; at the same time, driven by the moving mechanism 7, the guide member 8 provides appropriate limiting and guidance for the other side of the pole ear 2 on the side of the pole piece 1 away from the roller 5; and especially in the process of the pole piece 1 splicing and other actions, the position of the guide member 8 relative to the roller 5 can be adjusted by the moving mechanism 7 to facilitate the normal progress of the splicing and other actions.

[0030] Furthermore, as a preferred embodiment, a plurality of adsorption holes 9 are arranged in an annular array around the outer circumference of the end of the roller 5 near the tab 2, and the roller 5 is rotatably arranged relative to the negative pressure mechanism 6. Furthermore, the negative pressure mechanism 6 is relatively fixed and does not rotate synchronously with the roller 5 so that the direction of its negative pressure suction is stable; while the roller 5 is relatively rotatably arranged outside the negative pressure mechanism 6.

[0031] Furthermore, as a preferred embodiment, it further includes a support member, the negative pressure hook is fixedly arranged on the support member, and the roller 5 is rotatably sleeved on the outer side of the support member.

[0032] like Figure 4 As shown, further, as a preferred embodiment, the negative pressure mechanism 6 has a negative pressure suction port 10, the negative pressure suction port 10 is arranged in an arc shape, and the negative pressure suction port 10 is arranged toward the guide surface.

[0033] Furthermore, as a preferred embodiment, the negative pressure mechanism 6 is preferably a negative pressure air knife.

[0034] Furthermore, as a preferred embodiment, the negative pressure suction port 10 is preferably arranged at a face angle of 180 degrees. Furthermore, the negative pressure force generated by the negative pressure suction port 10 extends at least from the upper end of the roller 5 on the side close to the electrode 1 to the lower end of the roller 5 on the side close to the electrode 1. That is, when the electrode 1 is fed into the roller, the tab 2 begins to contact the surface of the roller 5 at the upper end due to the adsorption force, and loses the adsorption effect at the lower end of the roller 5 and automatically detaches from the surface of the roller 5, thereby avoiding the tab 2 from folding due to stress or poor condition when passing through the roller.

[0035] Furthermore, as a preferred embodiment, the roller 5 can be actively driven or passively rotated by the friction of the pole piece 1 .

[0036] like Figure 3 As shown, further, as a preferred embodiment, the moving mechanism 7 includes: a Y-axis rotating device 11, a Z-axis telescopic device 12, and an X-axis telescopic device 13. The Y-axis rotating device 11, the Z-axis telescopic device 12, and the X-axis telescopic device 13 are connected in sequence, and the X-axis telescopic device 13 is connected to the guide member 8. Furthermore, the rotation axis of the Y-axis rotating device 11 is coaxially arranged with the central axis of the roller 5. When one end of the Y-axis rotating device 11 rotates around the rotation axis, it will drive the Z-axis telescopic device 12, the X-axis telescopic device 13, and the guide member 8 to rotate synchronously, and this rotation at least causes the guide member 8 to be displaced in the Y direction, and the Y direction is preferably close to the direction from the roller 5 to the unwinding shaft 3. Moreover, driven by the Z-axis telescopic device 12, the X-axis telescopic device 13 and the guide member 8 can be moved closer to or away from the roller 5 in the radial direction of the roller 5. The X-axis telescopic device 13 preferably adjusts the position of the guide member 8 in a direction parallel to the axis of the roller 5.

[0037] Furthermore, as a preferred embodiment, it can automatically achieve at least X-axis contraction and Z-axis extension to adjust the position of the guide member 8 during the pole roll replacement and tape splicing process, thereby facilitating the tape splicing action. The advantage can be that the guide member 8 is relatively far away from the pole piece 1 to avoid it or is tightly attached to the pole piece 1 to limit the stretching; and it automatically returns to a reasonable position after the tape splicing action is completed.

[0038] Furthermore, as a preferred embodiment, the guide surface includes: a straight portion 14 and an arcuate portion 15, the straight portion 14 is arranged close to the roller 5, one end of the arcuate portion 15 is connected to one end of the straight portion 14, and the other end of the arcuate portion 15 is bent in a direction away from the pole piece 1.

[0039] Furthermore, as a preferred embodiment, the guide member 8 is preferably a sheet-like structure.

[0040] Furthermore, as a preferred embodiment, it also includes: a laser ranging device 16, which is arranged between the unwinding shaft 3 and the pole ear smoothing mechanism 4, and the laser ranging device 16 is used to obtain the distance between the pole piece 1 and the base point of the laser ranging device 16.

[0041] Furthermore, as a preferred embodiment, it further comprises: a correction system 17, which is arranged on the guide path, and the pole piece 1 can move through the correction system 17. Furthermore, the correction system 17 is used to at least obtain the offset state of the pole piece 1 in the X direction.

[0042] Furthermore, as a preferred embodiment, the correction system 17 preferably adopts an EPC correction system 17 .

[0043] Furthermore, as a preferred embodiment, the deviation correction system 17 is arranged between the tab smoothing mechanism 4 and the unwinding shaft 3.

[0044] Furthermore, as a preferred embodiment, the correction system 17 at least includes a sensor component for obtaining the offset of the pole piece 1 in the X direction, and controls the moving mechanism 7 to move accordingly.

[0045] Furthermore, as a preferred embodiment, the correction system 17 may also preferably include a mechanical adjustment mechanism for adjusting the position of the pole piece 1 in the X direction.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the implementation manner and protection scope of the present invention.

[0047] The present invention also has the following implementation methods based on the above:

[0048] In a further embodiment of the present invention, the correction system 17 is connected to the mobile mechanism 7 via a control system, and the laser distance measuring device 16 is connected to the mobile mechanism 7 via a control system. Furthermore, the offset of the pole piece 1 can be fed back by the correction system 17 to selectively control the offset movement of the guide member 8 in the X direction through the mobile mechanism 7; and the distance measurement feedback of the laser distance measuring device 16 can be used to achieve real-time control of the angle change of the guide member 8 when the pole piece 1 is offset due to different unwinding directions and reduced winding diameter, through the Y-direction rotation device 11 of the mobile mechanism 7, and can simultaneously achieve real-time offset of the guide member 8 in the Z direction; preferably, it can be ensured that the distance between the guide member 8 and the pole piece 1 is maintained at 1mm to 5mm.

[0049] In a further embodiment of the present invention, it also includes: a PLC system, which can preferably send a splicing instruction to the mobile mechanism 7 through the PLC system when the pole piece 1 needs to be re-spliced ​​after the roll is changed, and the mobile mechanism 7 automatically drives the guide member 8 to move in the X and Z directions, so that the guide member 8 moves toward the edge and away from the roller 5; and after the splicing is completed, the PLC system sends a recovery instruction to the mobile mechanism 7, and the guide member 8 returns to a reasonable position.

[0050] In a further embodiment of the present invention, at least two tab smoothing mechanisms 4 are sequentially arranged along the guide path.

[0051] In a further embodiment of the present invention, the two tab smoothing mechanisms 4 and the unwinding shaft 3 are arranged in a 7-shaped manner on the guide path. Figure 1 As shown, one of the tab smoothing mechanisms 4 is provided at the upper left corner of the entire 7-shaped arrangement, another tab smoothing mechanism 4 is provided at the upper right corner, and a reel 3 is provided below.

[0052] The above description is only a preferred embodiment of the present invention and does not limit the implementation method and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A tab guiding system, characterized in that: include: A guide path, on which a pole piece is conveyed, and the pole piece is provided with at least one pole lug; an unwinding shaft, the unwinding shaft being arranged at one end of the guide path, and one end of the pole piece being wound on the unwinding shaft; At least one tab smoothing mechanism, wherein the tab smoothing mechanism is arranged on the guide path; Among them, the tab smoothing mechanism includes: a roller, a negative pressure mechanism, a moving mechanism and a guide member, the roller is rotatably arranged on the guide path, a plurality of adsorption holes are opened on the roller, the negative pressure mechanism is arranged in the roller, the negative pressure mechanism is used to generate adsorption force at the adsorption holes, the moving mechanism is arranged close to the roller, the moving end of the moving mechanism is connected to the guide member, the guide member has a guide surface, and the tab is movably arranged between the adsorption hole and the guide surface.

2. The tab guiding system according to claim 1, characterized in that: A plurality of adsorption holes are arranged in a ring array around the outer periphery of one end of the roller, and the roller is rotatably arranged relative to the negative pressure mechanism.

3. The tab guiding system according to claim 2, characterized in that: The negative pressure mechanism has a negative pressure suction port, which is arranged in an arc shape and faces the guide surface.

4. The tab guiding system according to claim 1, characterized in that: The moving mechanism includes: a Y-direction rotating device, a Z-direction telescopic device and an X-direction telescopic device, the Y-direction rotating device, the Z-direction telescopic device and the X-direction telescopic device are connected in sequence, and the X-direction telescopic device is connected to the guide member.

5. The tab guiding system according to claim 1, characterized in that: The guide surface includes a straight portion and an arc portion, the straight portion is arranged close to the roller, one end of the arc portion is connected to one end of the straight portion, and the other end of the arc portion is bent in a direction away from the pole piece.

6. The tab guiding system according to claim 1, characterized in that: Also includes: A laser distance measuring device is provided between the unwinding shaft and the tab smoothing mechanism, and is used to obtain the position of the pole piece.

7. The tab guiding system according to claim 1, characterized in that: Also includes: A correction system is provided on the guide path, and the pole piece is movably arranged through the correction system.

8. The tab guiding system according to claim 7, characterized in that: The deviation correction system is arranged between the tab smoothing mechanism and the unwinding shaft.

9. The tab guiding system according to claim 1, characterized in that: At least two tab smoothing mechanisms are arranged in sequence along the guide path.

10. The tab guiding system according to claim 9, characterized in that: The two tab smoothing mechanisms and the unwinding shaft are arranged in a 7-shape on the guide path.

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