Diaphragm coating and winding equipment

Abstract

The utility model relates to the technical field of diaphragm winding devices, in particular to diaphragm coating and winding equipment which comprises a winding support and further comprises a deviation rectifying structure, a traction structure and a winding structure which are sequentially arranged on the winding support. The winding structure comprises a winding roller connected to the winding support and a driving assembly used for driving the winding roller. The wind-up roller is provided with an adjustable assembly, the adjustable assembly comprises a driving piece arranged in the wind-up roller, a plurality of appearance pieces arranged on the outer side of the driving piece in a wrapping mode, a connecting plate connected to the appearance pieces and a plurality of external expansion pieces connected to the connecting plate, and the multiple external expansion pieces are arranged in the circumferential direction of the wind-up roller. The driving piece of the adjustable assembly is used for driving the appearance piece, so that the appearance piece drives the external expansion piece to expand or shrink through the connecting plate so as to be close to or away from the winding drum, the tension of the diaphragm is adjusted, the winding structure can adapt to diaphragms with different winding diameters, and diaphragm winding damage caused when the winding diameters of the diaphragms are changed is prevented; and the winding quality and efficiency are improved.

Description

Technical Field

[0001] This application relates to the field of diaphragm winding device technology, and in particular to a diaphragm coating and winding device. Background Technology

[0002] In the construction of power batteries, the separator is a key component. Located inside the cell between the positive and negative electrodes, the separator primarily functions to isolate the positive and negative plates, allowing ions to pass through while retaining the electrolyte. Therefore, the manufacturing quality of the separator has a significant impact on the performance and lifespan of lithium batteries.

[0003] Diaphragm winding is a post-coating process. After coating, the diaphragm enters the winding equipment for winding and finishing. The winding diameter of the diaphragm varies depending on the process. As the winding diameter increases, the tension requirement of the diaphragm also increases. However, the winding tension provided by conventional winding equipment cannot adapt to changes in winding diameter, which can easily lead to unstable winding tension. For example, the diaphragm may become too tight during winding, causing damage or even micro-cracks; or it may shift during winding, resulting in uneven winding and wrinkles, all of which affect the quality of the finished diaphragm. Utility Model Content

[0004] The purpose of this application is to provide a diaphragm coating and winding device, which aims to improve the unstable winding tension of conventional winding devices and improve winding efficiency and quality.

[0005] This application provides a diaphragm coating and winding device, including a winding bracket, and further including a correction structure, a traction structure, and a winding structure sequentially arranged on the winding bracket; the winding structure includes a winding roller connected to the winding bracket and a driving assembly for driving the winding roller; the winding roller is provided with an adjustable assembly, the adjustable assembly including a driving member disposed inside the winding roller, a plurality of outer profile pieces covering the outside of the driving member, a connecting plate connected to the outer profile pieces, and a plurality of outer expansion pieces connected to the connecting plate, the plurality of outer expansion pieces being arranged along the circumferential direction of the winding roller.

[0006] Furthermore, the outer shape piece extends along the length direction of the drive member, the connecting plate corresponds one-to-one with the outer shape piece, the connecting plate passes through the take-up roller and connects with the outer expansion piece; the outer expansion piece extends along the length direction of the take-up roller.

[0007] Furthermore, the drive component includes an airbag disposed in the take-up roller and extending along the length direction of the take-up roller; the airbag has an air inlet connected to an air pipe.

[0008] Furthermore, the winding bracket is hinged to a connecting frame, and the winding roller is rotatably connected between the connecting frame and the winding bracket.

[0009] Furthermore, the traction structure includes a plurality of guide rollers and a traction roller rotatably connected to the winding bracket, and the traction roller is equipped with a tension sensor.

[0010] Furthermore, the correction structure includes a correction base, a sensing component disposed on the correction base, and a correction component; the correction component includes a rotating shaft rotatably connected to the correction base, a correction frame disposed on the rotating shaft, a correction roller rotatably connected to the correction frame, and a drive rod for driving the rotating shaft.

[0011] Furthermore, it also includes a pressing structure, which includes a pressing support seat disposed on the winding bracket, a swing arm hinged to the pressing support seat, and a connecting shaft disposed on the swing arm, wherein the connecting shaft is provided with a roller; the roller faces the winding roller.

[0012] Furthermore, it also includes a heat dissipation structure, which includes a heat dissipation base on which the winding bracket is mounted, a plurality of heat dissipation fans mounted on the heat dissipation base, and a heat dissipation plate. The heat dissipation plate has a plurality of heat dissipation holes. The heat dissipation fans face the heat dissipation holes, and the heat dissipation holes face the correction structure, the traction structure, and the winding structure.

[0013] The beneficial effects of this application are:

[0014] 1. This application provides a diaphragm coating and winding device, which sequentially sets a correction structure, a traction structure, and a winding structure on the winding bracket. After the diaphragm enters the winding device, it passes through the correction structure and the traction structure for directional correction, and then enters the winding structure. The winding structure is equipped with an adjustable component, and the driving component of the adjustable component drives the outer sheet, so that the outer sheet drives the outer expansion piece to expand or shrink through the connecting plate to move closer to or away from the roll, thereby adjusting the frictional resistance between the roll and the winding roller. The roll generates a certain slip on the outer wall of the winding roller, thereby changing the roll speed and adjusting the diaphragm tension. This allows the winding structure to adapt to diaphragms of different roll diameters, preventing diaphragm winding damage caused by changes in diaphragm roll diameter, and improving winding quality and efficiency.

[0015] 2. The winding equipment provided in this application uses an airbag as a driving component. By inflating and deflating the airbag through an air pipe, the outer expansion plate can be quickly controlled to open outward or contract inward. On the one hand, it can be used to adjust the diaphragm tension during winding. On the other hand, the diameter of the roll can be reduced by the contraction of the outer expansion plate to facilitate quick disassembly of the roll. The roll can be quickly installed and fixed by opening the outer expansion plate outward.

[0016] 3. The winding equipment is equipped with rollers facing the winding rollers. When winding the diaphragm, the rollers press against the outer wall of the roll film. The rollers' own weight can squeeze the diaphragm, causing it to continuously adhere to the winding, making the diaphragm smoother during winding and preventing wrinkles or damage caused by uneven winding. At the same time, by setting up a correction structure, when the diaphragm deviates, a drive rod can drive the rotating shaft to rotate, causing the correction frame and correction roller to swing. The swinging correction frame and correction roller correct the diaphragm, ensuring the positional accuracy of the diaphragm during winding and improving the winding quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a diaphragm coating and winding device provided in an embodiment of this application;

[0018] Figure 2 This is a top view of the structure of a diaphragm coating and winding device provided in an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the correction structure in the embodiments of this application;

[0020] Figure 4 This is a schematic diagram of the structure of the adjustable component in different states in the embodiments of this application;

[0021] Figure 5 This is a cross-sectional schematic diagram of the adjustable component in an embodiment of this application;

[0022] Figure 6 This is another structural schematic diagram of a diaphragm coating and winding device provided in an embodiment of this application;

[0023] Figure 7 This is a schematic diagram of the heat dissipation structure in an embodiment of this application.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Rewinding bracket; 11. Connecting frame; 2. Correction structure; 21. Correction base; 22. Sensing component; 221. Correction sensor; 23. Correction assembly; 231. Rotating shaft; 232. Correction frame; 233. Correction roller; 234. Drive rod; 235. Connecting rod; 3. Traction structure; 31. Traction roller; 32. Tension sensor; 4. Rewinding structure; 41. Rewinding roller; 42. Drive assembly; 43. Adjustable components; 431, drive unit; 4311, airbag; 43111, air inlet; 4312, air pipe; 4313, air pump; 432, outer shell; 433, connecting plate; 434, outer expansion plate; 5, pressing structure; 51, pressing support base; 52, swing arm; 53, connecting shaft; 54, roller; 6, heat dissipation structure; 61, heat dissipation base; 62, heat dissipation fan; 63, heat dissipation plate; 64, connecting fasteners. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0027] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0029] Reference Figure 1 as well as Figure 2 This application provides a diaphragm coating and winding device, including a winding bracket 1, and a correction structure 2, a traction structure 3, and a winding structure 4 sequentially disposed on the winding bracket 1. After the diaphragm enters the winding device, it undergoes directional correction by the correction structure 2 and the traction structure 3, and then enters the winding structure 4 for winding. When the diaphragm passes through the traction structure 3, the traction structure 3 acquires the diaphragm tension, and the winding structure 4 adjusts the tension according to the diaphragm tension to ensure winding quality.

[0030] Reference Figure 2 as well as Figure 3 Specifically, the winding bracket 1 is used to support and install various structures. The winding bracket 1 includes a frame, which is equipped with control components for controlling various structures. Side supports are respectively provided on both sides of the frame, and the two side supports and the frame form a cavity for accommodating and installing various structures. The correction structure 2 includes a correction base 21, a sensing component 22 disposed on the correction base 21, and a correction component 23. The sensing component 22 includes a support frame detachably connected to the correction base 21 and a correction sensor 221 disposed on the support frame. The correction sensor 221 consists of a light source and a photosensitive element. It uses the principle of light reflection or transmission to detect the positional deviation of the diaphragm. When the diaphragm shifts, the angle or intensity of the reflected or transmitted light changes. The photosensitive element receives the changed light, and its output electrical signal also changes accordingly, thereby determining the direction of the diaphragm shift.

[0031] The web guiding assembly 23 includes a rotating shaft 231 rotatably connected to the web guiding base 21, a web guiding frame 232 disposed on the rotating shaft 231, a web guiding roller 233 rotatably connected to the web guiding frame 232, and a drive rod 234 for driving the rotating shaft 231. To cooperate with the drive rod 234, a connecting rod 235 is fixedly connected to the web guiding frame 232. The connecting rod 235 is movably connected to the drive rod 234, which is fixedly installed inside the winding bracket 1. The drive rod 234 is a pneumatic telescopic rod. When web guiding is required, the drive rod 234 drives the web guiding frame 232 and the web guiding roller 233 to rotate around the rotating shaft 231 via the connecting rod 235, thereby correcting the misaligned diaphragm.

[0032] The traction structure 3 includes several guide rollers rotatably connected to the winding bracket 1 and a traction roller 31. The traction roller 31 provides the necessary traction force for the smooth movement of the diaphragm and ensures that the diaphragm is transported according to the predetermined production process. Tension sensors 32 are installed at both ends of the traction roller 31. Elastic elements are installed inside the tension sensors 32. Different tensions will cause the elastic elements to bend or stretch to different degrees, resulting in changes in resistance. The tension value of the diaphragm can be calculated according to the pre-calibrated relationship curve between resistance change and tension.

[0033] Reference Figure 4 as well as Figure 5 The winding structure 4 includes a winding roller 41 connected to the winding bracket 1 and a drive assembly 42 for driving the winding roller 41. The drive assembly 42 may specifically be a motor. The winding roller 41 is provided with an adjustable assembly 43 for cooperating with the winding of the diaphragm. The winding roller 41 is rotatably connected between the connecting frame 11 and the winding bracket 1. In order to cooperate in installing the winding roller 41, the winding bracket 1 is hinged to the connecting frame 11. The connecting frame 11 is a block structure with an arc groove in the middle. Correspondingly, the winding bracket 1 also has an arc structure that cooperates with the arc groove. One end of the winding roller 41 is sleeved between the arc groove and the arc structure and can rotate freely. The winding shaft can be quickly installed and disassembled by opening and closing the connecting frame 11, thereby facilitating the installation and removal of the diaphragm roll.

[0034] The adjustable component 43 includes a drive member 431 disposed within the take-up roller 41, a plurality of outer profile pieces 432 covering the outside of the drive member 431, a connecting plate 433 connected to the outer profile pieces 432, and a plurality of outwardly expanding pieces 434 connected to the connecting plate 433. The outwardly expanding pieces 434 are arranged along the circumferential direction of the take-up roller 41. Specifically, the outer profile pieces 432 extend along the length direction of the drive member 431, and the connecting plate 433 corresponds one-to-one with the outer profile pieces 432. The connecting plate 433 passes through the take-up roller 41 and connects with the outwardly expanding pieces 434, that is, one end of the connecting plate 433 is connected to the outer profile piece 432, and the other end of the connecting plate 433 is connected to the outwardly expanding piece 434. The outwardly expanding pieces 434 extend along the length direction of the take-up roller 41.

[0035] In this embodiment, the drive component 431 includes an airbag 4311, which is disposed in the take-up roller 41 and extends along the length of the take-up roller 41. An outer sheet 432 is bonded to the outer wall of the airbag 4311. The airbag 4311 has an air port 43111, which is connected to an air pipe 4312. The drive component 431 also includes an air pump 4313 disposed in the take-up bracket 1. The air pipe 4312 passes through the take-up roller 41 and is connected to the air pump 4313. A sealing ring (not shown in the figure) is provided at the connection between the air pipe 4312, the take-up roller 41, and the air port 43111. The sealing ring ensures that the air pump 4313 accurately inflates the airbag 4311 through the air pipe 4312 without affecting its normal rotation.

[0036] When tension adjustment is required, the air pump 4313 introduces gas into the air bag 4311 or extracts gas from the air bag 4311. The air bag 4311 expands or contracts, which in turn drives the outer shape plate 432 on its outer wall to expand or contract. The expanded or contracted outer shape plate 432 drives the corresponding outer expansion plate 434 to unfold outward or contract inward through the connecting plate 433, thereby adjusting the diameter of the roller formed by the outer expansion plate 434, thereby adjusting the frictional resistance between the roller and the inner wall of the drum, thereby controlling the drum speed to adjust the diaphragm tension.

[0037] Reference Figure 6 To further improve the winding quality, the coating equipment also includes a pressing structure 5. Specifically, the pressing structure 5 includes two pressing supports 51 disposed on the winding bracket 1, swing arms 52 respectively hinged to the two pressing supports 51, and a connecting shaft 53 disposed between the two swing arms 52. The connecting shaft 53 is equipped with a roller 54; the roller 54 faces the winding roller 41. In this embodiment, the roller 54 is located above the winding roller 41, and the roller 54 can rotate freely at the connecting shaft 53, so that its normal rotation is not affected when flattening the diaphragm roll. During winding, the roller 54 abuts against the continuously winding diaphragm under the action of gravity, thereby applying a compressive force to the diaphragm and preventing wrinkles or damage to the diaphragm due to uneven winding during winding.

[0038] Reference Figure 6 as well as Figure 7In addition, the coating equipment also includes a heat dissipation structure 6, which includes a heat dissipation base 61 with a winding bracket 1, several cooling fans 62 mounted on the heat dissipation base 61, and a heat dissipation plate 63. The cooling fans 62 are connected and fixed by multiple sets of connecting fasteners 64. The heat dissipation plate 63 is detachably connected to the upper outer surface of the heat dissipation base 61. The heat dissipation plate 63 has several heat dissipation holes, with the cooling fans 62 facing the heat dissipation holes, which in turn face the correction structure 2, the traction structure 3, and the winding structure 4. When the diaphragm passes through the upper end of the heat dissipation base 61, the cooling fans 62 can cool the passing diaphragm to prevent the diaphragm surface temperature from becoming too high and causing it to stick together during winding.

[0039] The working principle of the diaphragm coating and winding device disclosed in this application is as follows: First, the roll is sleeved on the outer wall of the winding roller 41. Air is pumped into the air bladder 4311 via the air pipe 4312 using an air pump 4313, causing it to expand and thus move the outer sheet 432 towards the inner wall of the winding roller 41. The outer sheet 432, through the connecting plate 433, drives the outer expansion sheet 434 towards the inner wall of the roll until the roll is fixed. The roll can rotate with the rotation of the winding roller 41 to wind up the diaphragm. When the diaphragm passes the correction sensor 221, the correction sensor 221 can detect whether the passing diaphragm has deviated. If deviation occurs, the drive rod 234 is used to extend and retract, causing the correction frame 232 and the correction roller 233 to swing and correct the diaphragm.

[0040] The diaphragm then passes through the traction structure 3, which detects the tension of the diaphragm via the tension sensor 32. The control component controls the air pump 4313 to inflate or deflate the airbag 4311 after comparing the tension. When the diaphragm is wound up, the change in the diaphragm roll diameter will cause the tension of the diaphragm to change. Inflating or deflating the airbag 4311 by the air pump 4313 can change the frictional resistance between the outer expansion plate 434 and the roll, so that a certain slippage is generated between the roll and the outer expansion plate 434, thereby changing the speed of the roll and thus adjusting the tension of the diaphragm to avoid diaphragm breakage.

[0041] Roller 54 is pressed against the outer wall of the film roll. The weight of roller 54 can squeeze the diaphragm, making the diaphragm flatter when it is wound up. The rotating swing arm 52 can make roller 54 move as the diameter of the film roll increases, so that it always adheres to the outer wall of the film roll. During this process, the heat dissipation structure 6 runs continuously to dissipate heat.

[0042] Exemplary embodiments of this disclosure have been specifically shown and described above. It should be understood that this disclosure is not limited to the detailed structures, arrangements, or implementations described herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. A diaphragm coating and winding device, comprising a winding bracket (1), characterized in that, It also includes a correction structure (2), a traction structure (3) and a winding structure (4) sequentially arranged on the winding bracket (1); the winding structure (4) includes a winding roller (41) connected to the winding bracket (1) and a drive assembly (42) for driving the winding roller (41); the winding roller (41) is provided with an adjustable assembly (43), the adjustable assembly (43) includes a drive member (431) disposed in the winding roller (41), a plurality of outer shape pieces (432) covering the outside of the drive member (431), a connecting plate (433) connected to the outer shape pieces (432) and a plurality of outer expansion pieces (434) connected to the connecting plate (433), the plurality of outer expansion pieces (434) being arranged along the circumferential direction of the winding roller (41).

2. The diaphragm coating and winding equipment according to claim 1, characterized in that, The outer shape piece (432) extends along the length direction of the drive member (431), and the connecting plate (433) corresponds one-to-one with the outer shape piece (432). The connecting plate (433) passes through the take-up roller (41) and is connected to the outer expansion piece (434). The outer expansion piece (434) extends along the length direction of the take-up roller (41).

3. The diaphragm coating and winding equipment according to claim 2, characterized in that, The drive unit (431) includes an airbag (4311), which is disposed in the take-up roller (41) and extends along the length direction of the take-up roller (41); the airbag (4311) has an air port (43111) and the air port (43111) is connected to an air tube (4312).

4. The diaphragm coating and winding equipment according to claim 1, characterized in that, The winding bracket (1) is hinged to a connecting frame (11), and the winding roller (41) is rotatably connected between the connecting frame (11) and the winding bracket (1).

5. The diaphragm coating and winding equipment according to claim 1, characterized in that, The traction structure (3) includes a plurality of rollers rotatably connected to the winding bracket (1) and a traction roller (31), wherein the traction roller (31) is provided with a tension sensor (32).

6. The diaphragm coating and winding equipment according to claim 1, characterized in that, The correction structure (2) includes a correction base (21), a sensing component (22) disposed on the correction base (21), and a correction component (23); the correction component (23) includes a rotating shaft (231) rotatably connected to the correction base (21), a correction frame (232) disposed on the rotating shaft (231), a correction roller (233) rotatably connected to the correction frame (232), and a drive rod (234) for driving the rotating shaft (231).

7. A diaphragm coating and winding device according to any one of claims 1-6, characterized in that, It also includes a pressing structure (5), which includes a pressing support (51) disposed on the winding bracket (1), a swing arm (52) hinged to the pressing support (51), and a connecting shaft (53) disposed on the swing arm (52). The connecting shaft (53) is provided with a roller (54); the roller (54) faces the winding roller (41).

8. A diaphragm coating and winding device according to any one of claims 1-6, characterized in that, It also includes a heat dissipation structure (6), which includes a heat dissipation base (61) on which the winding bracket (1) is mounted, a plurality of heat dissipation fans (62) mounted on the heat dissipation base (61), and a heat dissipation plate (63). The heat dissipation plate (63) has a plurality of heat dissipation holes. The heat dissipation fans (62) face the heat dissipation holes, and the heat dissipation holes face the correction structure (2), the traction structure (3), and the winding structure (4).

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