Curved surface curling and winding device

Abstract

The utility model relates to a battery pole piece technical field provides a curved surface curling and winding device, it includes: the outgoing pull roller, the rectification mechanism, the swing roller subassembly, the approach roller subassembly, the turret, the turret is equipped with the first winding reel, and the first winding reel receives the pole piece by swing roller subassembly transmission, wherein, the approach roller subassembly is after approaching the first winding reel, with the first winding reel curling pole piece, and the winding diameter increases, and the approach roller subassembly is away from the first winding reel gradually while winding diameter increases, thereby the approach roller keeps the contact pressing with pole piece in the pole piece winding process. Through the follow -up design of approach roller, reduce the distance of traditional winding swing arm last roller to winding shaft, avoid the fluctuation caused by the too long path in the winding process to cause the end face misalignment, white space and wrinkle phenomenon, and the use of winding pressure roller can make the tension of winding reduce and avoid the wrinkling phenomenon in the winding process.

Description

Technical Field

[0001] This utility model relates to the field of battery electrode technology, and in particular to a curved surface winding and coiling device. Background Technology

[0002] Battery electrodes are crucial components for ensuring battery performance, safety, and reliability. Modern lithium battery coating machines use high tension during the post-coating winding process to ensure neat end-face winding. High tension requires a larger clamping area, resulting in a wider blank space in the center of the coating area during winding. This wide blank space combined with high tension leads to a fish-scale pattern during winding, making tension control difficult and prone to deviations. This can easily cause wrinkles in the foil, uneven end faces, and ultimately, electrode quality issues. Utility Model Content

[0003] The purpose of this invention is to provide a curved surface curling and winding device, which aims to solve the technical problem that existing curved surface curling and winding devices cannot guarantee quality.

[0004] This application provides a curved surface curling and winding device, comprising:

[0005] The output roller includes a driving roller and a driven roller, which are used to press the electrode sheets together;

[0006] The correction mechanism is installed close to and fixedly mounted on the side of the output pull roller where the pressed electrode sheet is output. It is used to detect and correct edge deviation of the electrode sheet.

[0007] The oscillating roller assembly consists of a first oscillating roller assembly and a second oscillating roller assembly. The oscillating roller assembly is located on one side of the input electrode sheet and the other side of the output electrode sheet of the output traction roller. The oscillating roller assembly controls the electrode sheet tension. The first oscillating roller assembly is located on the input electrode sheet side of the output traction roller, and the second oscillating roller assembly is located on the output electrode sheet side of the output traction roller. The oscillating roller assembly is used to detect electrode sheet tension fluctuations, adjust the output traction roller speed, and absorb sudden changes in electrode sheet tension caused by speed differences.

[0008] The proximity roller assembly is located near the exit pull roller from the side where the pressed electrode sheet exits and is movably mounted for adaptive position adjustment according to the roll diameter.

[0009] A turret, the turret being provided with a first take-up drum, the first take-up drum receiving the electrode sheet transmitted by the tape assembly;

[0010] As the approach roller assembly approaches the first winding drum, the diameter of the winding drum increases as the first winding drum winds the electrode sheet. Simultaneously, the approach roller assembly gradually moves away from the first winding drum as the diameter of the winding drum increases, thereby maintaining contact and pressing with the electrode sheet during the electrode sheet winding process.

[0011] The beneficial effects of the curved surface winding and take-up device provided by this utility model are as follows: After the tape is attached to the take-up drum, the follow-up design of the proximity roller, that is, the proximity roller assembly is movable, approaches the take-up tape, or directly contacts the coiled electrode sheet, or always maintains a 1-2mm gap with the coiled electrode sheet. Compared with the traditional take-up swing arm that immediately coils after attaching the tape, although the traditional take-up swing arm shortens the distance between the take-up roller and the drum, it still cannot solve the problem of electrode sheet fluctuation. However, this utility model, through the proximity pressing or loose contact of the proximity roller assembly, can prevent electrode sheet fluctuation by limiting the position of the electrode sheet throughout the entire take-up process. Compared with the traditional take-up swing arm that can shorten the distance from the last roller to the take-up shaft, this utility model can directly prevent electrode sheet fluctuation by limiting the position of the electrode sheet, avoiding uneven electrode sheet end faces, white marks, wrinkles, and other phenomena caused by electrode sheet fluctuation during the take-up process. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A perspective view of the proximity roller assembly provided in an embodiment of this utility model;

[0014] Figure 2 A perspective view of the lifting connector assembly provided in an embodiment of this utility model;

[0015] Figure 3 To and Figure 2 3D images from different angles;

[0016] Figure 4 A schematic diagram of the overall winding assembly provided in an embodiment of this utility model;

[0017] Figure 5 A schematic diagram of the overall winding assembly provided in an embodiment of this utility model;

[0018] Figure 6 A schematic diagram of the overall winding assembly provided in an embodiment of this utility model.

[0019] The following are the labeling elements in the figure:

[0020] 1—Outgoing traction roller,

[0021] 11—Driver roller, 12—Driven roller

[0022] 2—Corrective action mechanism,

[0023] 3—Swing roller assembly,

[0024] 4—Proximity roller assembly,

[0025] 41—Approach roller mounting plate; 42—Approach roller; 43—Propulsion cylinder; 44—Direct drive for approach roller; 45—Sliding guide rail; 46—Approach roller assembly drive; 47—Drive gear.

[0026] 5—Connector assembly,

[0027] 51—Belt splicing roller; 52—Lifting belt splicing assembly; 53—Sheet metal protective cover; 54—Lifting guide rail; 55—Transition guide roller; 56—Belt splicing cutter; 57—Screw jack.

[0028] 6—Turret,

[0029] 61—First winding drum, 62—First winding drum, 63—First winding pressure roller, 64—Second winding pressure roller. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0031] Throughout this specification, references to "one embodiment" or "embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in another embodiment of this application," "in one embodiment," or "in some embodiments" appear in various places throughout the specification, and not all refer to the same embodiment. Furthermore, in one or more embodiments, particular features, structures, or characteristics may be combined in any suitable manner.

[0032] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] Please refer to Figures 1-6 The curved surface curling and winding device in the embodiments of this utility model will now be described.

[0036] Please refer to Figures 1-4 , Figure 6 This application provides a curved surface winding and rewinding device comprising: an output traction roller 1; a correction mechanism 2 for detecting and correcting electrode edge offset; a swing roller assembly 3 for detecting electrode tension fluctuations, adjusting the output traction roller speed, and absorbing sudden changes in electrode tension caused by speed difference; a proximity roller assembly 4; and a turret 6, the turret 6 having a first winding drum 61, the first winding drum 61 receiving the electrode transferred by the swing roller assembly 3; wherein, after the proximity roller assembly 4 approaches the first winding drum 61, as the first winding drum 61 winds the electrode and the drum diameter increases, the proximity roller assembly 4 gradually moves away from the first winding drum 61 while the drum diameter increases, thereby maintaining contact and pressing with the electrode during the electrode winding process.

[0037] The approach roller assembly 4 includes an approach roller mounting plate 41, an approach rubber roller 42, a propulsion cylinder 43, a direct drive for the approach rubber roller 44, a sliding guide rail 45, an approach roller assembly drive 46, and a drive gear 47. The approach roller mounting plate 41 houses the approach rubber roller 42, the propulsion cylinder 43, the direct drive for the approach rubber roller 44, and the sliding guide rail 45. The approach roller assembly drive 46 drives the drive gear 47, the drive gear 47 drives the sliding guide rail 45, the sliding guide rail 45 drives the approach roller mounting plate 41, and the approach roller mounting plate 41 drives the approach rubber roller 42.

[0038] Specifically, when the electrode enters the take-up mechanism, the tension is interrupted by the take-up roller. A tension swing roller and a correction mechanism are installed after the traction roller. The tension swing roller controls the tension at the take-up end to remain stable at the set value, while the correction mechanism ensures that the electrode take-up will not have uneven take-up ends due to left-right deviations. The approach roller and the tape-jointing mechanism are located after the correction mechanism. During tape-jointing, the swing roller assembly 3 first presses the roll material against the empty roll, and then the cutter cuts the roll material to achieve automatic tape-joining of the empty roll. After the action is completed, the swing roller assembly 3 retracts, and the side approach roller 4 approaches the direction of the newly joined empty roll. This allows for adaptive adjustment of the position according to the roll diameter. The approach roller is directly driven by a servo motor and changes with the linear speed set by the equipment during take-up, effectively ensuring the neatness of the take-up end face.

[0039] It should be noted that the swing roller assembly in this embodiment may be equipped with a cutter, and the approach roller assembly is not limited to the approach method to the first winding drum; the approach method can be any method.

[0040] In another embodiment of this application, please refer to Figures 1-4 The difference from Embodiment 1 is that a tape-connecting assembly 5 is added. The tape-connecting assembly includes a tape-connecting rubber roller 51, a lifting tape-connecting assembly 52, a protective sheet metal 53, a lifting guide rail 54, a transition guide roller 55, a tape-connecting cutter 56, and a screw jack 57. The tape-connecting rubber roller 51 is used to convey the electrode sheet to the first winding drum 61. The lifting tape-connecting assembly 52 is equipped with the tape-connecting rubber roller 51. The protective sheet metal 53 is equipped with the lifting tape-connecting assembly 52, the lifting guide rail 54, the transition guide roller 55, the tape-connecting cutter 56, and the screw jack 57. The screw jack 57 drives the lifting tape-connecting assembly 52.

[0041] The swing arm tape-joining mechanism is replaced with a bottom tape-joining mechanism. After the tape-joining action is completed, the entire tape-joining mechanism moves down and approaches the take-up drum to maintain contact with the roll material. As the roll diameter changes, the approach roller moves backward accordingly, maintaining contact with the roll material throughout the take-up process. Using a lifting tape-joining mechanism makes tape-joining operations more stable and avoids waste of bottom roll material caused by bottom roll wrinkling.

[0042] In another embodiment of this application, please refer to Figures 1-5 The difference from the above embodiments is that, as Figure 5 As shown, this embodiment adds a first winding pressure roller 63 and a second winding pressure roller 64. After the strip is spliced, the winding pressure roller below presses the roll material to complete the overall winding of the foil. Compared with the above embodiment, this embodiment adds a first winding pressure roller 63 and a second winding pressure roller 64, which can be closer to the roll when winding the electrode sheet and is less affected by tension. At the same time, the use of the winding pressure roller can reduce the winding tension and avoid wrinkling during the winding process.

[0043] In another embodiment of this application, please refer to Figures 1-5 The difference from the above embodiments is that, as Figure 5 As shown, a second take-up drum 62 has been added, which can immediately rotate the turret 6 after the first take-up drum 61 has completed the winding work, so that the second take-up drum 62 can start the winding work immediately, thus improving work efficiency.

[0044] In another embodiment of this application, please refer to Figures 1-4 The difference from the above embodiment is that the approach roller is located close to the winding drum, maintaining a gap of 1-2mm. As the drum diameter changes, the approach roller moves backward accordingly, maintaining a gap of 1-2mm with the drum throughout the winding process.

[0045] In another embodiment of this application, please refer to Figures 1-4 and Figure 5 The pull roller 1 includes a drive roller 11 and a driven roller 12, which are used to press the electrode sheets.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A curved surface curling and winding device, characterized in that, The curved surface curling and winding device includes: The pull roller (1) is used to press the electrode sheet; The correction mechanism (2) is fixedly installed near the output roller (1) on the side of the pressed electrode sheet output from the output roller (1) and is used to detect edge deviation of the pressed electrode sheet and correct it. The swing roller assembly (3) is disposed on one side of the input electrode and the other side of the output electrode of the output traction roller (1), and the tension of the electrode is controlled by the swing roller; The approach roller assembly (4) is located near the output pull roller (1) from the side where the pressed electrode sheet is output and is movably mounted, for adaptive adjustment of position according to the roll diameter. A turret (6) is located on the side near the output electrode of the swing roller assembly (3). The turret (6) is provided with a first winding drum (61) which receives the electrode transmitted by the swing roller assembly (3). As the first winding drum (61) winds up the electrode sheet, the diameter of the approach roller assembly (4) increases after it approaches the first winding drum (61). As the diameter of the approach roller assembly (4) increases, it gradually moves away from the first winding drum (61), thereby maintaining contact and pressing with the electrode sheet during the electrode sheet winding process.

2. The curved surface curling and winding device according to claim 1, characterized in that: The curved surface winding and take-up device also includes a tape receiving assembly (5), which receives the electrode sheet transmitted by the swing roller assembly (3), and the first take-up drum (61) receives the electrode sheet transmitted by the tape receiving assembly (5).

3. The curved surface curling and winding device according to claim 2, characterized in that: The turret (6) is provided with a first take-up pressure roller (63). After the first take-up drum (61) receives the electrode sheet, the first take-up pressure roller (63) approaches and maintains contact with the electrode sheet to press it.

4. The curved surface curling and winding device according to claim 3, characterized in that: The proximity roller assembly (4) includes a proximity roller mounting plate (41), a proximity rubber roller (42), a propulsion cylinder (43), a proximity rubber roller direct drive (44), a sliding guide rail (45), a proximity roller assembly drive (46), and a drive gear (47). The proximity roller mounting plate (41) is provided with the proximity rubber roller (42), the propulsion cylinder (43), the proximity rubber roller direct drive (44), and the sliding guide rail (45). The proximity roller assembly drive (46) drives the drive gear (47), the drive gear (47) drives the sliding guide rail (45), the sliding guide rail (45) drives the proximity roller mounting plate (41), and the proximity roller mounting plate (41) drives the proximity rubber roller (42).

5. The curved surface curling and winding device according to claim 3, characterized in that: The tape splicing assembly (5) includes a tape splicing roller (51), a lifting tape splicing assembly (52), a protective sheet metal cover (53), a lifting guide rail (54), a transition guide roller (55), a tape splicing cutter (56), and a screw jack (57). The tape splicing roller (51) is used to convey the electrode sheet to the first winding drum (61). The lifting tape splicing assembly (52) is provided with the tape splicing roller (51). The protective sheet metal cover (53) is provided with the lifting tape splicing assembly (52), the lifting guide rail (54), the transition guide roller (55), the tape splicing cutter (56), and the screw jack (57). The screw jack (57) drives the lifting tape splicing assembly (52).

6. The curved surface curling and winding device according to claim 1 or 2, characterized in that: The proximity roller assembly (4) maintains a 1-2 mm gap with the electrode during the electrode winding process. The pull roller (1) includes a drive roller (11) and a driven roller (12), which are used to press the electrode together.

7. The curved surface curling and winding device according to claim 6, characterized in that: The turret (6) is equipped with a second winding drum (62).

8. The curved surface curling and winding device according to claim 7, characterized in that: The turret (6) is equipped with a second winding pressure roller (64).

9. The curved surface curling and winding device according to claim 1 or 2, characterized in that: The turret (6) is equipped with a second winding drum (62).

10. The curved surface curling and winding device according to claim 1 or 2, characterized in that: The turret (6) is equipped with a second winding pressure roller (64).

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