Curved surface curling winding device and winding method thereof

Abstract

The invention relates to the technical field of battery pole pieces, and provides a curved surface curling and winding device and a winding method thereof. A deviation correcting mechanism; a swing roller assembly; an approach roller assembly; the rotating tower is provided with a first winding drum, and the first winding drum receives the pole pieces transmitted by the swing roller assembly; wherein after the approaching roller assembly is close to the first winding drum, the approaching roller assembly gradually gets away from the first winding drum while the winding diameter is increased along with the increase of the winding diameter of the pole piece wound by the first winding drum, so that the approaching roller keeps in contact and pressing with the pole piece in the winding process of the pole piece. Through the follow-up design of the approaching rollers, the distance between the last roller of a traditional winding swing arm and a winding shaft is reduced, the phenomena of irregular end faces, blank leaving, wrinkling and the like caused by fluctuation due to the fact that a path is too long in the winding process are avoided, meanwhile, the winding tension can be reduced through the use of the winding pressing rollers, and the wrinkling phenomenon in the winding process is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pole pieces, and in particular to a curved surface curling and winding device and a winding method thereof. Background Art

[0002] Battery pole pieces are important components to ensure battery performance, safety and reliability. Current lithium battery coating machines use high-tension winding to ensure the uniformity of the end face during winding after coating. High tension requires a larger tightening area, so the width of the blank space in the middle of the coating area is large during winding. The large width of the blank space combined with high tension will cause fish-scale patterns during winding. The tension control is difficult, so deviations are prone to occur, which can easily cause wrinkles in the foil and uneven end faces, leading to quality problems in the pole pieces. Summary of the Invention

[0003] The purpose of the present invention is to provide a curved surface curling and winding device and a winding method thereof, aiming to solve the technical problem that the existing curved surface curling and winding devices are difficult to ensure quality.

[0004] In a first aspect, the present application provides a curved surface curling and winding device comprising:

[0005] A pulling roller, comprising a driving roller and a driven roller, wherein the driving roller and the driven roller are used for pressing the pole piece;

[0006] The deflection correction mechanism is fixedly installed on the side where the pressed pole piece is output from the pulling roller, close to the pulling roller, and is used to detect the edge deviation of the pole piece and correct the deflection;

[0007] The swing roller assembly includes a first swing roller assembly and a second swing roller assembly. The swing roller assemblies are arranged on one side of the input pole piece of the pulling roller and one side of the output pole piece. The pole piece tension is controlled by the swing rollers. The first swing roller assembly is arranged on one side of the input pole piece of the pulling roller, and the second swing roller assembly is arranged on one side of the output pole piece of the pulling roller. The swing roller assembly is used to detect fluctuations in pole piece tension, adjust the rotation speed of the pulling roller, and absorb sudden changes in pole piece tension caused by speed differences.

[0008] The approach roller assembly is movably installed near the output roller from the side where the pressed electrode sheet is output from the output roller, and is used to adaptively adjust the position according to the size of the coil diameter;

[0009] The tape splicing assembly is movably installed near the side where the lamination electrode piece is output from the output roller and close to the output roller. The tape splicing assembly receives the electrode piece transferred by the swing roller assembly.

[0010] A turret, wherein the turret is provided with a first winding drum, the first winding drum receiving the pole piece delivered by the splicing assembly;

[0011] Among them, after the approach roller assembly approaches the first winding drum, the winding diameter increases as the first winding drum winds the pole piece, and the approach roller assembly gradually moves away from the first winding drum while the winding diameter increases, so that the approach roller assembly maintains contact and pressure with the pole piece during the winding process of the pole piece.

[0012] In a second aspect, the present application provides a winding method using the curved surface winding device, the winding method comprising the following steps:

[0013] S101, the pole piece enters the pulling roller;

[0014] S201, the correction mechanism detects the edge deviation of the pole piece and corrects the deviation;

[0015] S301, the swing roller assembly detects the fluctuation of the pole piece tension and adjusts the pulling roller speed to absorb the sudden change of the pole piece tension caused by the speed difference;

[0016] S401: The tape splicing assembly receives the pole piece transferred by the swing roller assembly, the tape splicing assembly approaches the first winding reel, and the first winding reel receives the pole piece transferred by the tape splicing assembly;

[0017] S501, the tape splicing assembly moves away from the first winding reel;

[0018] S601. After the approach roller assembly approaches the first winding drum, as the first winding drum winds the pole piece, the winding diameter increases, and the approach roller assembly gradually moves away from the first winding drum while the winding diameter increases.

[0019] The beneficial effect of the curved surface curling and winding device provided by the present invention is: through the follow-up design of the approach roller, that is, the approach roller assembly is movable, and the splicing assembly is moved away after splicing, thereby making approach space for the approach roller, and the approach roller assembly moves close to the wound tape at this time, or directly contacts the curling pole piece, or always maintains a 1-2mm gap with the curling pole piece. Compared with the traditional winding swing arm that curls immediately after splicing the tape, although the traditional winding swing arm shortens the distance between the roller and the reel before winding compared with the previous winding method, the present invention greatly shortens the distance between the roller and the reel before winding through the successive movement of the splicing assembly and the approach roller assembly. Compared with the distance from the last roller of the traditional winding swing arm to the winding shaft, the present invention can reduce the distance to the theoretical minimum value through the continuous cooperation of the splicing assembly and the approach roller assembly, avoiding fluctuations caused by the excessively long path during the winding process, thereby causing uneven end faces, blank spaces, wrinkles, and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A perspective view of an approach roller assembly provided in an embodiment of the present invention;

[0022] Figure 2 A three-dimensional diagram of a lifting type splicing assembly provided in an embodiment of the present invention;

[0023] Figure 3 For Figure 2 Stereoscopic images from different angles;

[0024] Figure 4 A schematic diagram of an overall winding assembly provided in an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of an overall winding assembly provided in an embodiment of the present invention;

[0026] Figure 6 A schematic diagram of the overall winding assembly provided in an embodiment of the present invention.

[0027] Among them, the reference numerals in the figures are:

[0028] 1—pulling roller,

[0029] 11 - driving roller, 12 - driven roller,

[0030] 2—Correction mechanism,

[0031] 3—swing roller assembly,

[0032] 4—Approach roller assembly,

[0033] 41 - proximity roller mounting plate, 42 - proximity rubber roller, 43 - propulsion cylinder, 44 - proximity rubber roller direct drive, 45 - sliding guide rail, 46 - proximity roller assembly drive, 47 - drive gear,

[0034] 5—Tape splicing assembly,

[0035] 51 - Splicing rubber roller, 52 - Lifting splicing assembly, 53 - Sheet metal guard, 54 - Lifting guide rail, 55 - Transition guide roller, 56 - Splicing cutter, 57 - Screw lift,

[0036] 6—turret,

[0037] 61—first winding drum, 62—first winding drum, 63—first winding pressure roller, 64—second winding pressure roller. DETAILED DESCRIPTION

[0038] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0039] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in another embodiment of the present application," "in one embodiment," or "in some embodiments" appear in various places throughout this specification, not all references are to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0040] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0042] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0043] Please refer to Figure 1-6 Now, the curved surface curling and winding device in the embodiment of the present invention is described.

[0044] Please refer to Figure 1-4 、 Figure 6The present application provides a curved surface curling and winding device including: a delivery roller 1, the delivery roller 1 including an active roller 11 and a driven roller 12, the active roller 11 and the driven roller 12 are used to press the pole piece; a correction mechanism 2, used to detect the edge offset of the pole piece and correct the deviation; a swing roller assembly 3, used to detect the fluctuation of the pole piece tension, adjust the rotation speed of the delivery roller, and absorb the sudden change of the pole piece tension caused by the speed difference; an approach roller assembly 4; a turret 6, the turret 6 is provided with a first winding reel 61, the first winding reel 61 receives the pole piece transmitted by the swing roller assembly 3; wherein, after the approach roller assembly 4 approaches the first winding reel 61, as the first winding reel 61 curls the pole piece, the winding diameter increases, and the approach roller assembly 4 gradually moves away from the first winding reel 61 while the winding diameter increases, so that the approach roller assembly 4 maintains contact and pressure with the pole piece during the winding process of the pole piece.

[0045] The approach roller assembly 4 includes an approach roller mounting plate 41, an approach rubber roller 42, a propulsion cylinder 43, an approach rubber roller direct drive 44, a sliding guide rail 45, an approach roller assembly drive 46, and a drive gear 47. The approach roller mounting plate 41 is provided with the approach rubber roller 42, the propulsion cylinder 43, the approach rubber roller direct drive 44, and the sliding guide rail 45. The approach roller assembly drive 46 drives the drive gear 47, and 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.

[0046] The specific operation is that when the pole piece enters the outgoing and rewinding mechanism, the outgoing and rewinding roller diagram is used to make a tension cutoff. A tension swing roller and a correction mechanism are set behind the traction roller. The tension swing roller only acts to control the tension at the rewinding end to stabilize at the set value. The correction mechanism ensures that the pole piece rewinding will not cause uneven rewinding end faces due to left and right deviations. The approaching rubber roller and the splicing mechanism are set after the correction mechanism. During the splicing operation, the swing roller assembly 3 first presses the coil against the empty reel, and then the cutter cuts the coil to realize automatic splicing of the empty reel. After the operation is completed, the swing roller assembly 3 withdraws, and the side approaching rubber roller 4 approaches the direction of the new empty reel, which can realize adaptive adjustment of the position according to the size of the reel diameter. The approaching rubber roller is directly driven by a servo motor and changes with the line speed set by the equipment during the rewinding process, effectively ensuring the neatness of the rewinding end face.

[0047] It should be noted that the swing roller assembly of this embodiment can be provided with a cutter, and the approach roller assembly does not limit the approaching method of approaching the first winding reel, and the approaching method can be any method.

[0048] In another embodiment of this application, please refer to Figure 1-4, which is different from Example 1, is that a splicing assembly 5 is added, and the splicing assembly includes a splicing rubber roller 51, a lifting splicing assembly 52, a shield sheet metal 53, a lifting guide rail 54, a transition guide roller 55, a splicing cutter 56, and a screw elevator 57, wherein the splicing rubber roller 51 is used to transfer the pole piece to the first winding reel 61, the lifting splicing assembly 52 is provided with the splicing rubber roller 51, the shield sheet metal 53 is provided with the lifting splicing assembly 52, the lifting guide rail 54, the transition guide roller 55, the splicing cutter 56, and the screw elevator 57, and the screw elevator 57 drives the lifting splicing assembly 52.

[0049] The swing arm splicing mechanism is replaced with one that splices from below. After the splicing action is completed, the entire splicing mechanism moves downward, and the approach roller is positioned close to the winding reel to maintain contact with the coil. As the coil diameter changes, the approach roller moves backward and always maintains contact with the coil during the winding process. The use of a lifting splicing mechanism makes the splicing operation more stable and avoids waste of bottom roll material caused by wrinkling of the bottom roll.

[0050] In another embodiment of this application, please refer to Figure 1-5 , which is different from the above embodiment in that, Figure 5 As shown in the figure, a first winding pressure roller 63 and a second winding pressure roller 64 are added. After the tape is connected, the winding pressure roller below presses the coil to complete the overall winding of the foil. Compared with the above embodiment, this embodiment adds the first winding pressure roller 63 and the second winding pressure roller 64. When winding the pole piece, it can be closer to the drum and less affected by the tension. At the same time, the use of the winding pressure roller can reduce the winding tension to avoid wrinkling during the winding process.

[0051] In another embodiment of this application, please refer to Figure 1-5 , which is different from the above embodiment in that, Figure 5 As shown, the second winding reel 62 is added, and after the first winding reel 61 completes the winding work, the turret 6 is immediately rotated to allow the second winding reel 62 to start the winding work immediately, thereby improving work efficiency.

[0052] In another embodiment of this application, please refer to Figure 1-4 The difference from the above embodiment is that the approach roller is located close to the winding drum, maintaining a gap of 1-2 mm. As the roll diameter changes, the approach roller moves backward and always maintains a gap with the drum during the winding process.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A curved surface curling and winding device, characterized in that: The curved surface curling and winding device comprises: A pulling roller (1), the pulling roller (1) comprising a driving roller (11) and a driven roller (12), the driving roller (11) and the driven roller (12) being used for pressing the pole piece; A deflection correction mechanism (2), the deflection correction mechanism (2) is fixedly installed near the output roller (1) on the side where the output roller (1) outputs the pressed electrode piece, and is used to detect the edge deviation of the pressed electrode piece and correct the deflection; A swing roller assembly (3), wherein the swing roller assembly (3) comprises a first swing roller assembly (31) and a second swing roller assembly (32), wherein the swing roller assembly (3) is arranged on one side of the input pole piece and one side of the output pole piece of the output pulling roller (1), and the pole piece tension is controlled by the swing rollers, wherein the first swing roller assembly (31) is arranged on one side of the input pole piece of the output pulling roller (1), and the second swing roller assembly (32) is arranged on one side of the output pole piece of the output pulling roller (1); an approach roller assembly (4), the approach roller assembly (4) being movably mounted close to the output roller (1) from the side where the output roller (1) outputs the pressed electrode piece, and being used for adaptively adjusting the position according to the size of the coil diameter; a belt splicing assembly (5), the belt splicing assembly (5) being movably mounted near the output roller (1) from the side where the output roller (1) outputs the pressed electrode piece, and receiving the electrode piece transferred by the swing roller assembly (3); A turret (6), the turret (6) being arranged on a side close to the electrode output of the tape splicing assembly (5), the turret (6) being provided with a first winding drum (61), the first winding drum (61) receiving the electrode delivered by the tape splicing assembly (5); Wherein, after the approach roller assembly (4) approaches the first winding reel (61), as the first winding reel (61) winds the pole piece, the winding diameter increases, and the approach roller assembly (4) gradually moves away from the first winding reel (61) while the winding diameter increases, so that the approach roller assembly (4) maintains contact and pressing with the pole piece during the winding process of the pole piece.

2. The curved surface curling and winding device according to claim 1, characterized in that: The turret (6) is provided with a first winding roller (63). After the first winding reel (61) receives the pole piece delivered by the splicing assembly (5), the first winding roller (63) approaches and maintains contact and pressing with the pole piece.

3. The curved surface curling and winding device according to claim 2, characterized in that: The approach roller assembly (4) includes an approach roller mounting plate (41), an approach rubber roller (42), a propulsion cylinder (43), an approach rubber roller direct drive (44), a sliding guide rail (45), an approach roller assembly drive (46), and a drive gear (47). The approach roller mounting plate (41) is provided with the approach rubber roller (42), the propulsion cylinder (43), the approach rubber roller direct drive (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).

4. The curved surface curling and winding device according to claim 2, characterized in that: The tape splicing assembly (5) comprises a tape splicing rubber roller (51), a lifting type tape splicing assembly (52), a protective cover sheet metal (53), a lifting guide rail (54), a transition guide roller (55), a tape splicing cutter (56), and a screw elevator (57), wherein the tape splicing rubber roller (51) is used to transmit the pole piece to the first winding reel (61), the lifting type tape splicing assembly (52) is provided with the tape splicing rubber roller (51), the protective cover sheet metal (53) is provided with the lifting type tape splicing assembly (52), the lifting guide rail (54), the transition guide roller (55), the tape splicing cutter (56), and the screw elevator (57), and the screw elevator (57) drives the lifting type tape splicing assembly (52).

5. The curved surface curling and winding device according to claim 2, characterized in that: The approach roller assembly (4) maintains a 1-2 mm spacing with the pole piece during the pole piece winding process of the pole piece by the first winding reel (61).

6. The curved surface curling and winding device according to claim 5, characterized in that: The turret (6) is provided with a second winding drum (62).

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

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

9. The curved surface curling and winding device according to claim 2, characterized in that: The turret (6) is provided with a second winding roller (64).

10. A winding method, characterized in that: The winding method adopts the curved surface curling and winding device according to any one of claims 1 to 9, and the winding method comprises the following steps: S101, the pole piece enters the pulling roller (1); S201, the correction mechanism (2) detects the edge deviation of the pole piece and corrects the deviation; S301, the swing roller assembly (3) detects fluctuations in pole piece tension, adjusts the pulling roller speed, and absorbs sudden changes in pole piece tension caused by speed differences; S401, the tape splicing assembly (5) receives the pole piece transferred by the swing roller assembly (3), the tape splicing assembly (5) approaches the first winding reel (61), and the first winding reel (61) receives the pole piece transferred by the tape splicing assembly (5); S501, the tape splicing assembly (5) moves away from the first winding reel (61); S601: After the approach roller assembly (4) approaches the first winding drum (61), the winding diameter increases as the first winding drum (61) winds the pole piece, and the approach roller assembly (4) gradually moves away from the first winding drum (61) while the winding diameter increases.

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