Novel coating structure

Abstract

The utility model discloses a novel coating structure which comprises a drying device, a coating head, a winding device, an unwinding device, a driving piece, a Mobius ring type track and a driving device, an inlet and an outlet are formed in the two sides of the drying device, the unwinding device is arranged at the inlet, the winding device is arranged at the outlet, and the winding device is arranged at the outlet. One side of the winding device and one side of the unwinding device are respectively provided with a driving device, the Mobius ring type track is arranged in the drying device, the coating head is arranged at the inlet and extends into the drying device, the driving piece is arranged in the drying device or arranged on the outer side of the drying device, and the driving piece is in transmission connection with the Mobius ring type track. By arranging the Mobius ring type roller way in the drying device, coating and drying of the two faces of the foil can be completed at a time, and the phenomenon that due to the fact that the single face of the foil passes through the drying oven twice, the peeling strength of the two faces is inconsistent, and then the material falling risk exists in the follow-up procedure of the pole piece can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of coating equipment, in particular to a novel coating structure. Background Art

[0002] Coating is an essential process in the production of lithium-ion batteries and a key process that directly affects various performance characteristics such as battery safety, capacity, and consistency. Coating involves applying a prepared, viscous, paste-like slurry evenly, continuously, or intermittently to a substrate (aluminum or copper foil), ensuring consistent thickness at each coating location and keeping the coating thickness within the tolerances required by the process. Currently, the mainstream coating method in China is to coat side A first, then rewind the coating machine, and then return to the coating machine head to coat side B. This can lead to two drawbacks: First, coating side A first, then side B. This means that when coating side B, side A will pass through the oven twice, resulting in inconsistent peel strength between the A / B surfaces and the risk of material dropout in subsequent electrode processing steps. Second, when coating the A / B surfaces, the surface density is controlled through tolerances. This means that when coating side B, if the surface density of side A is at the upper limit, side B will be adjusted to the lower limit to ensure the total surface density is at the middle limit, ultimately resulting in uneven coating density between the A / B surfaces. The two risks will further affect the performance of the final battery cell. Utility Model Content

[0003] The purpose of this utility model is to provide a new coating structure for solving the above technical problems.

[0004] The technical solutions adopted in this utility model are as follows:

[0005] A novel coating structure includes a drying device, a coating head, a winding device, an unwinding device, a driving member, a Möbius ring track and a driving device, wherein an inlet and an outlet are provided on both sides of the drying device, the unwinding device is provided at the inlet, the winding device is provided at the outlet, and the driving device is provided on one side of the winding device and the unwinding device respectively. The Möbius ring track is provided in the drying device, the coating head is provided at the inlet and extends into the drying device, the driving member is provided in the drying device or on the outside of the drying device, and the driving member is connected to the Möbius ring track by transmission.

[0006] Preferably, the Möbius ring track includes track beams distributed in a Möbius ring shape, a plurality of conveying rollers are arranged between two of the track beams, the plurality of conveying rollers are distributed along the Möbius ring shape, and both ends of the conveying rollers are rotatably connected to the two track beams.

[0007] As a further preference, it also includes a pressure roller, and a plurality of the pressure rollers are arranged between the two track beams, and channels are formed between the plurality of pressure rollers and the plurality of conveying rollers, and the two ends of the pressure rollers are rotatably connected to the two track beams.

[0008] As a further preference, it further includes support legs, and a plurality of the support legs are provided at the lower ends of the two track beams.

[0009] As a further preference, it also includes a first driven gear, a chain and a first gear, one end of each of the conveying rollers passes through one of the track beams, and one end of each of the conveying rollers is provided with a first gear, the chain connects several of the first gears, and one of the conveying rollers is provided with a first driven gear.

[0010] As a further preference, the driving member is arranged in the drying device, and the driving member includes a driving motor and a first driving gear. The driving motor is located on the lower side of the track beam, and the first driving gear is provided on the output shaft of the driving motor. The first driving gear is engaged with the first driven gear.

[0011] Preferably, the winding device and the unwinding device both include:

[0012] Mounting rack;

[0013] A roller, the roller is arranged in the mounting frame, and connecting shafts are provided at both ends of the roller, wherein one end of the connecting shaft passes through the mounting frame and is connected to the second driven gear;

[0014] A bracket is provided on one side of the mounting frame, and the driving device is provided on the bracket.

[0015] As a further preference, the driving device includes a motor, the motor is arranged on the bracket, a second driving gear is arranged on the output shaft of the motor, and the second driving gear is meshed with the second driven gear.

[0016] Preferably, an inspection door is further included, and the inspection door is respectively provided in the inlet and the outlet.

[0017] As a further preference, it further includes guide rollers, which are respectively provided in the inlet and the outlet, and are located at the lower side of the inspection door.

[0018] The above technical solution has the following advantages or beneficial effects:

[0019] In the utility model, a Möbius ring roller is arranged inside the drying device, the foil is first wound on the Möbius ring roller, and then a mark is applied at the position opposite to the coating head, and then coating is started from the marked position. During the coating process, the Möbius ring roller drives the foil to rotate, and at the same time the drying device starts to operate to dry the coating position. When the mark is recognized for the third time, the coating and drying of both sides of the foil are completed. The coating and drying of both sides of the foil can be completed at one time, which can avoid the single side of the foil passing through the oven twice, resulting in inconsistent peeling strength on the two sides, and further leading to the risk of material falling in subsequent processes of the electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the novel coating structure in the utility model;

[0021] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 It is a structural schematic diagram of the Möbius ring track in the present utility model;

[0023] Figure 4 It is a top view of the novel coating structure in the present utility model.

[0024] In the figure: 1. Drying device; 2. Coating head; 3. Winding device; 4. Unwinding device; 5. Möbius ring track; 6. Driving device; 7. Conveyor roller; 8. Pressure roller; 9. Support leg; 10. Mounting frame; 11. Bracket; 12. Roller; 13. Connecting shaft; 14. Second driven gear; 15. Motor; 16. Second driving gear; 17. Inspection door; 18. Guide roller; 19. Track beam; 20. First driving gear; 21. First driven gear; 22. First gear; 23. Driving motor. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like are used to indicate positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of this utility model and to simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used solely for descriptive purposes and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] Figure 1 It is a structural schematic diagram of the novel coating structure in the utility model; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 It is a structural schematic diagram of the Möbius ring track in the present utility model; Figure 4 This is a top view of the new coating structure in the utility model, see Figures 1 to 4 As shown, a preferred embodiment is shown, which shows a new coating structure, including a drying device 1, a coating head 2, a winding device 3, an unwinding device 4, a driving member, a Möbius ring track 5 and a driving device 6. An inlet and an outlet are provided on both sides of the drying device 1. The unwinding device 4 is provided at the inlet, and the winding device 3 is provided at the outlet. A driving device 6 is provided on one side of the winding device 3 and the unwinding device 4, respectively. The Möbius ring track 5 is provided in the drying device 1, and the coating head 2 is provided at the inlet and extends into the drying device 1. The driving member is provided in the drying device 1 or on the outside of the drying device 1, and the driving member is connected to the Möbius ring track 5 in a transmission manner. In this embodiment, the drying device 1 is a prior art, and its specific structure and working principle are no longer specifically limited here. See. Figure 1As shown, an inlet and an outlet are provided on both sides of the drying device 1 for the foil to enter and leave. A coating trough is provided on the drying device 1 below the inlet. The coating trough runs through the side wall of the drying device 1, so that the coating head 2 can extend into the interior of the drying device 1 through the coating trough to evenly spray the slurry on the surface of the foil. The drying device 1 is used to dry the slurry on the surface of the foil. A slurry tank can be provided on the outside, and two coating heads 2 can be provided, both of which extend into the drying device 1 through the coating trough and can be positioned directly opposite the foil. The two coating heads 2 can be connected to the two slurry tanks through two slurry pumps. The two slurry tanks are filled with different slurries to provide two different slurries for the coating head 2.

[0029] The driving device 6 is used to drive the winding device 3 and the unwinding device 4 to control the winding and unwinding of the foil.

[0030] The provided drive element can drive the conveyor roller 7 in the Möbius loop track 5 to rotate, thereby driving the foil to move on the Möbius loop track 5, so that the foil's movement trajectory forms a Möbius loop. In this embodiment, a camera can be installed on the outside of the drying device 1, directly opposite the coating tank, to identify the markings on the foil and transmit the identified information to a controller (PLC controller), which controls the operation of the drive device 6, the drive element, the drying device 1, and the two slurry pumps.

[0031] Furthermore, as a preferred embodiment, the Möbius ring track 5 includes track beams 19 distributed in a Möbius ring shape, and a plurality of conveying rollers 7 are provided between the two track beams 19. The plurality of conveying rollers 7 are distributed along the Möbius ring shape, and the two ends of the conveying rollers 7 are rotatably connected to the two track beams 19. For the specific structure of the Möbius ring track 5, see Figure 3 As shown, the Möbius ring track 5 includes two track beams 19, and the conveying rollers 7 are arranged between the track beams 19. The distribution of the conveying rollers 7 can be seen in FIG. Figure 3 As shown, both ends of the conveyor roller 7 may have a rotating shaft, which may be a part of the conveyor roller 7 itself. A mounting hole is provided on the side wall of the track beam 19, and the rotating shaft can be rotatably inserted into the mounting hole to facilitate the rotation of the conveyor roller 7. Similarly, the connection method between the pressure roller 8 and the track beam 19 is the same as the connection method between the conveyor roller 7 and the track beam 19, except that the rotating shafts at both ends of the pressure roller 8 do not pass through the track beam 19.

[0032] Furthermore, as a preferred embodiment, the Möbius loop track 5 also includes a pressure roller 8. Several pressure rollers 8 are also provided between the two track beams 19. A channel is formed between the pressure rollers 8 and the conveyor rollers 7. The ends of the pressure rollers 8 are rotatably connected to the two track beams 19. The number of pressure rollers 8 can be less than the number of conveyor rollers 7. The pressure rollers 8 are used to press the foil and cooperate with the conveyor rollers 7 to limit the movement trajectory of the foil, so that the movement trajectory of the foil ultimately forms a Möbius loop. The position of the pressure rollers 8 can be set as needed, for example, they can be set at the curvature of the foil to prevent the foil from falling. The rotation of the pressure rollers 8 can be driven by the foil. Since the foil is in contact with the pressure rollers 8, the movement of the foil naturally drives the pressure rollers 8 to rotate.

[0033] Furthermore, as a preferred embodiment, the Möbius loop track 5 further includes support legs 9, with a plurality of support legs 9 disposed at the lower ends of the two track beams 19. These support legs 9 are used to support the Möbius loop track 5 and are specifically connected to the track beams 19 within the Möbius loop track 5. The support legs 9 are connected to the lower inner wall of the drying device 1 to facilitate securing the position of the track beams 19. The number of support legs 9 can be adjusted as needed.

[0034] Furthermore, as a preferred embodiment, the Möbius ring track 5 also includes a first driven gear 21, a chain (not shown) and a first gear 22. One end of each conveyor roller 7 passes through a track beam 19, and one end of each conveyor roller 7 is provided with a first gear 22. The chain connects a plurality of first gears 22, and one of the conveyor rollers 7 is provided with a first driven gear 21. The driving member can be provided in the drying device 1, and the driving member includes a driving motor 23 and a first driving gear 20. The driving motor 23 is located on the lower side of the track beam 19. The first driving gear 20 is provided on the output shaft of the driving motor 23, and the first driving gear 20 is meshed with the first driven gear 21. The driving motor 23 can be installed on the support leg 9 through the motor 15 mounting bracket 10. For details, please refer to Figure 3 The drive motor 23 is used to drive the first driving gear 20 to rotate, and then the first driving gear 20 drives the first driven gear 21 to rotate. When the first driven gear 21 rotates, it can drive the corresponding conveying roller 7 to rotate. The conveying roller 7 can drive the first gear 22 thereon to rotate, thereby driving the chain to rotate. The chain can then drive several first gears 22 to rotate, and then drive several conveying rollers 7 to rotate, facilitating the conveying of foil.

[0035] In this embodiment, the drive motor 23 can be set on the outside of the drying device 1 through a motor mounting bracket. In this case, the output shaft of the drive motor 23 will pass through the side wall of the drying device 1 and extend into the lower side of the first driven gear 21, and then mesh with the first driven gear 21 through the first driving gear 20.

[0036] In this embodiment, the number of conveying rollers 7 can be set as needed. Figure 3 The diagram provided is merely a schematic diagram of the Möbius loop track 5 and does not limit the angle between the first gear 22 and the track beam 19. It is sufficient that the chain can be connected to a plurality of first gears 22 and drive the plurality of first gears 22 to rotate normally. The chain does not contact the track beam 19 during rotation. In other embodiments, a guide plate may be provided on the side of the track beam 19 near the first gear 22. The guide plate is distributed along the Möbius loop and connected to the track beam 19 via a connecting rod. The side of the chain near the track beam 19 may abut against the guide plate, thereby limiting the movement of the chain and preventing the chain from contacting the track beam 19.

[0037] Furthermore, as a preferred embodiment, the winding device 3 and the unwinding device 4 both include:

[0038] Mounting frame 10;

[0039] The roller 12 is disposed in the mounting frame 10. Connecting shafts 13 are provided at both ends of the roller 12. One end of the connecting shaft 13 passes through the mounting frame 10 and is connected to a second driven gear 14.

[0040] Bracket 11, a bracket 11 is provided on one side of the mounting frame 10, and a driving device 6 is provided on the bracket 11. In this embodiment, the structure of the mounting frame 10 can be seen in FIG. Figure 1 As shown, bracket 11 is provided on one side of mounting frame 10 for mounting a drive unit 6. Drive unit 6 can rotate roller 12 to reel or unreel the foil. Connecting shafts 13 at both ends of roller 12 are rotatably connected to both sides of mounting frame 10. Holes for mounting connecting shafts 13 can be provided on both sides of mounting frame 10.

[0041] Furthermore, as a preferred embodiment, the drive device 6 includes a motor 15 mounted on the bracket 11. A second driving gear 16 is mounted on the output shaft of the motor 15, meshing with the second driven gear 14. The motor 15 can be mounted on the bracket 11 via bolts. When in operation, the motor 15 drives the second driving gear 16, which in turn rotates the second driven gear 14. The second driven gear 14, in turn, rotates the connecting shaft 13, which in turn rotates the roller 12, thereby winding or unwinding the foil. The motor 15 and the drive motor 23 are each connected to a controller.

[0042] Furthermore, as a preferred embodiment, an inspection door 17 is further included, and an inspection door 17 is provided in the inlet and outlet. The inspection door 17 is made of a transparent material to facilitate observation of the internal situation of the drying device 1. The outer wall of the inspection door 17 can be welded or bolted to the inner wall of the inlet or outlet.

[0043] Furthermore, as a preferred embodiment, guide rollers 18 are provided at the inlet and outlet, respectively, and are located below access door 17. These guide rollers 18 facilitate automatic adjustment of the foil's trajectory as it enters or leaves drying device 1, allowing it to be wound around Möbius track 5 or roller 12 of winding device 3. The ends of guide rollers 18 can be rotatably connected to the inner walls of the outlet or inlet via a rotating shaft, and connection holes that mate with the rotating shaft can be provided on the inner walls of the outlet or inlet.

[0044] The upper end of the drying device 1 is provided with an openable end cover.

[0045] During use, the controller controls the motor 15 of the unwinding device 4 to work, the foil on the unwinding device 4 is pulled out, and manually wound on the Möbius ring roller. After winding one circle, the foil is cut, and the two ends of the foil wound on the Möbius ring roller are connected together. Then, a mark is marked on the foil at the position opposite to the coating head 2. At this time, the camera recognizes the mark for the first time and sends a start control signal to the controller. At this time, the controller controls the slurry pump, the drying device 1, and the drive motor 23 to work. One of the slurry pumps pumps the first slurry into a coating head 2, and the first slurry is applied to one side of the foil through the coating head 2. At the same time, the drive motor 23 drives the first driving gear 20 to rotate, and finally drives the conveyor roller 7 to rotate. The conveyor roller 7 drives the foil to move along a preset trajectory (Mobius ring trajectory). When the camera recognizes the mark for the second time, the controller controls another slurry pump to pump the second slurry into another coating head 2, and the second slurry is applied to the other side of the foil through the coating head 2. When the camera recognizes the mark for the third time, both sides of the foil are coated and dried. At this time, the slurry pump, drive motor 23 and drying device 1 are turned off, and then the drying device 1 is turned on, the foil is cut, and then the foil is passed through the outlet and wound on the roller 12 of the winding device 3.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the implementation method and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A new coating structure, characterized in that: It includes a drying device, a coating head, a winding device, an unwinding device, a driving member, a Möbius ring track and a driving device. An inlet and an outlet are provided on both sides of the drying device. The unwinding device is provided at the inlet, and the winding device is provided at the outlet. The driving device is provided on one side of the winding device and the unwinding device respectively. The Möbius ring track is provided in the drying device. The coating head is provided at the inlet and extends into the drying device. The driving member is provided in the drying device or on the outside of the drying device. The driving member is connected to the Möbius ring track by transmission.

2. The novel coating structure according to claim 1, characterized in that: The Möbius ring track includes track beams distributed in a Möbius ring shape, and a plurality of conveying rollers are arranged between two track beams. The plurality of conveying rollers are distributed along the Möbius ring shape, and both ends of the conveying rollers are rotatably connected to the two track beams.

3. The novel coating structure according to claim 2, characterized in that: It also includes a pressure roller, and a plurality of the pressure rollers are arranged between the two track beams. Channels are formed between the pressure rollers and the conveying rollers, and the two ends of the pressure rollers are rotatably connected to the two track beams.

4. The novel coating structure according to claim 2, characterized in that: It also includes supporting legs, and a plurality of the supporting legs are provided at the lower ends of the two track beams.

5. The novel coating structure according to claim 2, characterized in that: It also includes a first driven gear, a chain and a first gear. One end of each of the conveying rollers passes through one of the track beams, and one end of each of the conveying rollers is provided with a first gear. The chain connects several of the first gears, and one of the conveying rollers is provided with a first driven gear.

6. The novel coating structure according to claim 5, characterized in that: The driving member is arranged in the drying device, and the driving member includes a driving motor and a first driving gear. The driving motor is located at the lower side of the track beam. The first driving gear is provided on the output shaft of the driving motor, and the first driving gear is meshed with the first driven gear.

7. The novel coating structure according to claim 1, characterized in that: The reeling device and the unreeling device both include: Mounting rack; A roller, the roller is arranged in the mounting frame, and connecting shafts are provided at both ends of the roller, wherein one end of the connecting shaft passes through the mounting frame and is connected to the second driven gear; A bracket is provided on one side of the mounting frame, and the driving device is provided on the bracket.

8. The novel coating structure according to claim 7, characterized in that: The driving device includes a motor, which is arranged on the bracket. A second driving gear is arranged on the output shaft of the motor, and the second driving gear is meshed with the second driven gear.

9. The novel coating structure according to claim 1, characterized in that: It also includes an inspection door, which is respectively provided in the inlet and the outlet.

10. The novel coating structure according to claim 7, characterized in that: It also includes guide rollers, which are respectively arranged in the inlet and the outlet, and the guide rollers are located at the lower side of the inspection door.

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