Pole lug pre-folding mechanism

Abstract

The utility model relates to a pole lug pre-folding mechanism which comprises a passing roller, a bending assembly used for bending a pole piece pole lug and an adjusting assembly, the pole lug pre-folding mechanism further comprises an edge sensor and a controller, and the edge sensor is arranged on the upstream of the passing roller and used for sensing the position of the edge of the pole piece pole lug end. The controller controls the adjusting assembly to drive the bending assembly to move in the direction parallel to the axial direction of the passing roller according to the edge position, sensed by the edge sensor, of the tab end of the pole piece, so that the bending assembly moves to the edge position of the tab end of the pole piece to pre-bend the tab. The edge sensor and the controller are arranged to be linked with the adjusting assembly, the edge sensor detects and senses the side edge position of a pole piece and a pole lug in real time, the position of the bending assembly is adjusted according to material line fluctuation or pole piece film width change, the consistency of the side edge of the pole piece and the pole lug and the edge position of the bending assembly is guaranteed, and the bending efficiency is improved. And the consistency of the pre-folding effect of the tabs is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to an ear pre-folding mechanism. Background Art

[0002] During the processing of cylindrical batteries, in order to solidify the state of the ears, prevent the ears from being inserted into the internal of the battery cell, causing internal short circuit of the battery, and at the same time to meet the welding requirements of the current collector plate and the top cover, it is necessary to compress the battery cell to a specified height and flatten the ears of the battery cell. To prevent the ears of the battery cell from being turned over, wrinkled and difficult to flatten during the flattening process, resulting in the ears being inserted into the separator, piercing the separator and the positive and negative electrode plates, causing internal short circuit of the battery cell, it is necessary to pre-fold the ears.

[0003] For example, the patent with the publication number of CN219683657U discloses an ear pre-folding mechanism, which includes a bracket, a guide roller, a bending assembly, a pressing assembly, and an adjusting assembly; the guide roller is rotatably arranged on the bracket, the bending assembly and the pressing assembly are arranged adjacent to the bracket, the pressing assembly is used to press the ears on the surface of the guide roller, and the bending assembly is used to bend the ears; the adjusting assembly is connected to the bending assembly and the pressing assembly, and the adjusting assembly is used to drive the pressing assembly and the bending assembly to move in a direction parallel to the axial direction of the guide roller. However, due to the change of the material line and the tolerance in the laser die-cutting process of the current equipment, the pre-folding mechanism at a fixed position will result in inconsistent pre-folding effects, and there may be batch pre-folding defects, and it cannot adapt to the changes of different incoming materials. Summary of the Utility Model

[0004] Based on this, aiming at the technical problem that the pre-folding angle of the bending roller of the current pre-folding mechanism cannot be adjusted and cannot meet the pre-folding angle requirements of different incoming materials, the utility model provides an ear pre-folding mechanism.

[0005] An ear pre-folding mechanism provided by the utility model includes a guide roller, a bending assembly for bending the ears of the electrode sheet, and an adjusting assembly. The ear pre-folding mechanism further includes an edge sensor and a controller. The edge sensor is arranged upstream of the guide roller and is used to sense the position of the edge of the end of the ear of the electrode sheet. The controller controls the adjusting assembly according to the position of the edge of the end of the ear of the electrode sheet sensed by the edge sensor to drive the bending assembly to move in a direction parallel to the axial direction of the guide roller, so that the bending assembly moves to the position of the edge of the end of the ear of the electrode sheet to pre-fold the ears.

[0006] In this utility model, by setting up an edge sensor and a controller to be linked with an adjustment component, the edge position of the tab side of the sensing tab is detected in real time by the edge sensor. When the material line fluctuates or the film width of the tab changes, the edge sensor detects the change in the edge position of the tab side of the tab. The controller controls the adjustment component to drive the bending component to move to the edge position of the tab side of the tab according to the edge information of the tab side of the tab, ensuring the consistency of the edge position between the tab side edge of the tab and the bending component, preventing the change of the pre-bending effect of the tab caused by the fluctuation of the material line or the change of the film width of the tab, and ensuring the consistency of the pre-bending effect of the tab.

[0007] As a further improvement of the above solution of this utility model, it further includes a signal amplifier, and the signal amplifier is communicatively connected to the edge sensor and the controller.

[0008] As a further improvement of the above solution of this utility model, it further includes a bracket, and the idler roller is rotatably installed on the bracket through a rotating shaft.

[0009] As a further improvement of the above solution of this utility model, the bending component includes a bending roller, the bending roller is located at one end of the idler roller and is fixedly installed on the rotating shaft, and the bending roller has a frustum-shaped structure.

[0010] As a further improvement of the above solution of this utility model, it further includes a pressing component for pressing the tab on the surface of the idler roller, and the pressing component includes a pressing roller, a pressing frame and a pressing cylinder; the pressing cylinder is installed on the bracket and its telescopic end faces the idler roller, the pressing frame is installed on the telescopic end of the pressing cylinder, the pressing roller is located above the idler roller and is parallel to the idler roller, and the pressing roller is rotatably installed on the pressing frame.

[0011] As a further improvement of the above solution of this utility model, it further includes a mounting frame, the mounting frame is arranged upstream of the idler roller, and the edge sensor is installed on the mounting frame.

[0012] As a further improvement of the above solution of this utility model, it further includes a manual adjustment component, and the manual adjustment component includes an adjustment lead screw and a fixed frame. The adjustment lead screw is rotatably installed on the fixed frame, a moving block is in threaded engagement with the adjustment lead screw and the moving block is slidably installed on the fixed frame. The length direction of the adjustment lead screw is perpendicular to the moving direction of the tab and one end of the adjustment lead screw is provided with a knob and the knob is provided with scales, and the mounting frame is connected to the moving block.

[0013] As a further improvement of the above solution of this utility model, it further includes a purging air block, and the purging air block is installed on the mounting frame and is used for blowing air to the edge sensor.

[0014] As a further improvement to the above solution of the present utility model, the adjustment assembly includes a base, a servo motor, a guide rail, a sliding table and a lead screw; the servo motor and the guide rail are both installed on the base, the sliding table is slidably installed on the guide rail and the bracket is installed on the sliding table, the lead screw passes through the sliding table and is in threaded cooperation with the sliding table, and the output end of the servo motor is connected to the lead screw.

[0015] As a further improvement to the above solution of the present utility model, the adjustment assembly further includes an angular position table, the angular position table is installed on the sliding table, and the bracket is installed on the angular position table.

[0016] Compared with the prior art, the present utility model has the following beneficial effects:

[0017] 1. By setting an edge sensor and a controller to be linked with the adjustment assembly, the present utility model can detect the position of the side edge of the tab of the sensing pole piece in real time through the edge sensor. When the material line fluctuates or the film width of the pole piece changes, the edge sensor detects the change in the position of the side edge of the tab of the pole piece, and the controller controls the adjustment assembly to drive the bending assembly to move to the position of the side edge of the tab of the pole piece according to the side edge information of the tab of the pole piece, ensuring the consistency of the side edge position of the tab of the pole piece and the bending assembly, preventing the change of the pre-bending effect of the tab due to the fluctuation of the material line or the change of the film width of the pole piece, and ensuring the consistency of the pre-bending effect of the tab.

[0018] 2. By setting a manual adjustment assembly to adjust the position of the edge sensor, the present utility model can ensure compatibility with pole pieces of different widths.

[0019] 3. By setting a purging air block to purge the edge sensor, the present utility model can prevent dust from accumulating on the edge sensor and ensure the accuracy of the detection by the edge sensor. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of an ear pre-bending mechanism proposed in an embodiment of the present utility model;

[0021] Figure 2 For Figure 1 Another perspective view;

[0022] Figure 3 It is a schematic structural diagram of an angular position table in an ear pre-bending mechanism proposed in an embodiment of the present utility model;

[0023] Figure 4 It is a schematic installation diagram of an edge sensor and a purging air block in an ear pre-bending mechanism proposed in an embodiment of the present utility model;

[0024] Figure 5 It is a schematic structural diagram of a manual adjustment assembly in an ear pre-bending mechanism proposed in an embodiment of the present utility model.

[0025] Reference numerals: 1, over-roller; 2, pole piece; 3, edge sensor; 4, bracket; 5, bending roller; 6, pressing roller; 7, pressing frame; 8, pressing cylinder; 9, mounting frame; 10, adjusting lead screw; 11, fixing frame; 12, moving block; 13, knob; 14, purging air block; 15, servo motor; 16, guide rail; 17, slide table; 18, base; 19, angular position table. Detailed implementation manners

[0026] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below in conjunction with specific embodiments. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0028] Referring to Figure 1 、 Figure 2 , this embodiment provides an ear pre-bending mechanism, which includes an over-roller 1, a bending assembly, an adjusting assembly, an edge sensor 3 and a controller (not shown in the figure), and may further include a signal amplifier (not shown in the figure), a bracket 4, a pressing assembly and a mounting frame 9.

[0029] The bracket 4 provides an installation basis for the over-roller 1, the bending assembly and the pressing assembly. A horizontally arranged rotating shaft is rotatably installed on the bracket 4, and the over-roller 1 is installed on the rotating shaft. The pole piece 2 being conveyed passes through the over-roller 1.

[0030] The pressing assembly includes a pressing roller 6, a pressing frame 7 and a pressing cylinder 8. The cylinder body of the pressing cylinder 8 is fixedly installed at the top of the bracket 4 and its output end faces the over-roller 1, and the pressing frame 7 is installed at the output end of the pressing cylinder 8. The pressing roller 6 is rotatably installed on the pressing frame 7. The pressing roller 6 is located above the over-roller 1 and is parallel to the over-roller 1, and one end face of the pressing roller 6 and one end face of the over-roller 1 are in the same vertical plane. When the pole piece 2 passes through the over-roller 1, the pressing cylinder 8 extends to make the pressing roller 6 press against the pole piece 2, and the moving pole piece 2 can drive the over-roller 1 and the pressing roller 6 to rotate.

[0031] The bending assembly is used to bend the tabs of the pole piece 2. In this embodiment, the bending assembly includes a bending roller 5, which is also installed on the transfer shaft and is arranged at one end of the rotating shaft close to the pressing roller 6. The bending roller 5 has a frustum structure and its small-diameter end faces the passing roller 1. During the conveying process of the pole piece 2, the tab end of the pole piece 2 needs to face the bending roller 5. When the pole piece 2 passes through the passing roller 1, since the pole piece 2 is pressed by the pressing roller 6, under the action of the bending roller 5, the tab of the pole piece 2 is pre-bent by the bending roller 5.

[0032] The adjusting assembly includes a base 18, a servo motor 15, a guide rail 16, a sliding table 17, a lead screw, and an angular position table 19. The base 18 is fixed to the wall or an external device. The servo motor 15 and the guide rail 16 are both installed on the base 18. The extending direction of the guide rail 16 is parallel to the axial direction of the passing roller 1. The sliding table 17 is slidably installed on the guide rail 16. The lead screw passes through the sliding table 17 and is in threaded cooperation with the sliding table 17. The output end of the servo motor 15 is connected to the lead screw. The angular position table 19 is installed on the sliding table 17, and the bottom of the bracket 4 is installed on the angular position table 19. When the servo motor 15 is started, it drives the lead screw to rotate forward and backward, driving the sliding table 17 to move horizontally left and right, thereby driving the passing roller 1, the pressing roller 6, and the bending roller 5 to move horizontally left and right to ensure that the bending roller 5 can bend the tabs of the pole piece 2. Moreover, by manually adjusting the inclination angle of the bracket through the angular position table 19, the inclination angle of the bending roller 5 is adjusted, thereby adjusting the pre-bending angle of the tabs. The angular position table 19 is used, and the angular position table 19 is equipped with a micrometer for convenient and precise adjustment. In this embodiment, the angular position table 19 adopts the existing technology, and its structure is as Figure 3 shown and will not be elaborated here.

[0033] The edge sensor 3 is located upstream of the passing roller 1 and is used to sense the position of the side edge of the tab of the pole piece 2. In this embodiment, in combination with Figure 4 , there are two edge sensors 3, and the two edge sensors 3 are arranged vertically opposite to each other. The mounting bracket 9 has a C-shaped structure, and both edge sensors 3 are installed on the mounting bracket 9. The pole piece 2 is conveyed within the C-shaped opening of the mounting bracket 9. In combination with Figure 5 , the tab pre-bending mechanism of this embodiment further includes a manual adjustment assembly. The manual adjustment assembly includes an adjustment lead screw 10 and a fixing bracket 11. The fixing bracket 11 is fixed to the wall or an external device. The adjustment lead screw 10 is horizontally rotatably installed on the fixing bracket 11. The length direction of the adjustment lead screw 10 is perpendicular to the conveying direction of the tabs. A moving block 12 is in threaded cooperation with the adjustment lead screw 10 and the moving block 12 is slidably installed on the fixing bracket 11. The mounting bracket 9 is connected to the moving block 12. In this embodiment, one end of the adjustment lead screw 10 is provided with a knob 13 and the knob 13 is provided with scales. When the adjustment lead screw 10 is rotated, the horizontal movement of the moving block 12 will drive the two edge sensors 3 to move horizontally, thereby adjusting the positions of the two edge sensors 3, ensuring compatibility with pole pieces 2 of different widths, and having scale adjustment, which is convenient for personnel to adjust and record parameters.

[0034] Since the edge sensor 3 is vulnerable to the influence of dust in the environment, which may cause the edge sensor 3 to be contaminated and result in errors, in this embodiment, two purging air blocks 14 are further installed on the mounting frame 9. The two purging air blocks 14 are connected to the air source and blow air to the two edge sensors 3 respectively. The purging air blocks 14 can adopt a porous design and are installed in parallel at the position of the edge sensors 3, effectively ensuring the purging effect on the surface of the edge sensors 3 and preventing dust from accumulating on the edge sensors 3.

[0035] The signal amplifier is communicatively connected to the two edge sensors 3 and also communicatively connected to the controller. The controller is communicatively connected to the servo motor 15. After the two edge sensors 3 detect the edge information of the tab side of the pole piece 2, they send the information to the signal amplifier. The signal amplifier amplifies and integrates the signals of the two edge sensors 3 and then transmits them to the controller. The controller controls the servo motor 15 to drive the slide table 17 to move according to the edge information of the tab side of the pole piece 2, thereby driving the passing roller 1, the pressing roller 6, and the bending roller 5 to move.

[0036] Through the above structural settings, when the tab pre-bending mechanism of this embodiment is working, the moving pole piece 2 passes through the C-shaped opening of the mounting frame 9 and then passes through the passing roller 1. The pressing cylinder 8 extends to make the pressing roller 6 press against the pole piece 2. The moving pole piece 2 drives the passing roller 1 and the pressing roller 6 to rotate. At this time, the tab of the pole piece 2 is bent by passing through the conical bending roller 5; during the whole process, the two edge sensors 3 continuously sense and detect the edge position of the tab side of the pole piece 2. If the material line fluctuates or the film width of the pole piece 2 changes, the two edge sensors 3 detect the change in the edge position of the tab side of the pole piece 2. The signal amplifier amplifies and integrates the signals of the two edge sensors 3 and then transmits them to the controller. The controller controls the servo motor 15 to drive the slide table 17 to move according to the edge information of the tab side of the pole piece 2, so that the bending roller 5 moves to the edge position of the tab side of the pole piece 2, ensuring the consistency between the edge position of the tab side of the pole piece 2 and the edge of the bending roller 5, and preventing the bending effect from being changed due to the fluctuation of the material line or the change in the film width of the pole piece 2.

[0037] It should be noted that when a component is referred to as being "mounted on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intermediate component at the same time. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there may be an intermediate component at the same time.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of the present utility model in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "or / and" as used herein includes any and all combinations of one or more of the related listed items.

[0039] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0040] The above-described embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. An ear pre-bending mechanism, which comprises a passing roller (1), a bending assembly for bending the ear of a pole piece (2), and an adjusting assembly, and is characterized in that, The tab pre-bending mechanism further includes an edge sensor (3) and a controller. The edge sensor (3) is arranged upstream of the passing roller (1) and is used to sense the position of the edge of the tab end of the tab (2). The controller controls the adjusting assembly according to the position of the edge of the tab end of the tab (2) sensed by the edge sensor (3) to drive the bending assembly to move in a direction parallel to the axial direction of the passing roller (1), so that the bending assembly moves to the position of the edge of the tab end of the tab (2) to pre-bend the tab.

2. The tab pre-folding mechanism according to claim 1, wherein It further includes a signal amplifier, and the signal amplifier is communicatively connected to the edge sensor (3) and the controller.

3. The tab pre-folding mechanism according to claim 1, characterized in that, It further includes a bracket (4), and the passing roller (1) is rotatably mounted on the bracket (4) through a rotating shaft.

4. The tab pre-folding mechanism according to claim 3, characterized in that, The bending assembly includes a bending roller (5). The bending roller (5) is located at one end of the passing roller (1) and is fixedly mounted on the rotating shaft. The bending roller (5) has a frustum-shaped structure.

5. The tab pre-folding mechanism according to claim 3, wherein, It further includes a pressing assembly for pressing the tab (2) on the surface of the passing roller (1). The pressing assembly includes a pressing roller (6), a pressing frame (7) and a pressing cylinder (8); the pressing cylinder (8) is mounted on the bracket (4) and its telescopic end faces the passing roller (1). The pressing frame (7) is mounted on the telescopic end of the pressing cylinder (8). The pressing roller (6) is located above the passing roller (1) and is parallel to the passing roller (1). The pressing roller (6) is rotatably mounted on the pressing frame (7).

6. The tab pre-folding mechanism according to claim 1, wherein It further includes a mounting frame (9). The mounting frame (9) is arranged upstream of the passing roller (1), and the edge sensor (3) is mounted on the mounting frame (9).

7. The tab pre-folding mechanism according to claim 6, wherein It further includes a manual adjusting assembly. The manual adjusting assembly includes an adjusting lead screw (10) and a fixing frame (11). The adjusting lead screw (10) is rotatably mounted on the fixing frame (11). A moving block (12) is in threaded engagement with the adjusting lead screw (10) and the moving block (12) is slidably mounted on the fixing frame (11). The length direction of the adjusting lead screw (10) is perpendicular to the moving direction of the tab, and one end of the adjusting lead screw (10) is provided with a knob (13) and the knob (13) is provided with scales. The mounting frame (9) is connected to the moving block (12).

8. The tab pre-folding mechanism according to claim 1, characterized in that, It further includes a purging air block (14). The purging air block (14) is mounted on the mounting frame (9) and is used to blow air to the edge sensor (3).

9. The tab pre-folding mechanism according to claim 1, characterized in that, The adjusting assembly includes a base (18), a servo motor (15), a guide rail (16), a sliding table (17) and a lead screw; the servo motor (15) and the guide rail (16) are both mounted on the base (18). The sliding table (17) is slidably mounted on the guide rail (16) and the bracket (4) is mounted on the sliding table (17). The lead screw passes through the sliding table (17) and is in threaded engagement with the sliding table (17). The output end of the servo motor (15) is connected to the lead screw.

10. The tab pre-folding mechanism according to claim 9, characterized in that, The adjusting assembly further includes an angular position table (19). The angular position table (19) is mounted on the sliding table (17), and the bracket (4) is mounted on the angular position table (19).

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