Gluing mechanism

Abstract

The utility model belongs to the technical field of gluing, and discloses a gluing mechanism which comprises a gluing roller, a supporting assembly, a glue scraping assembly and a gluing driving piece. At least one glue groove is formed in the peripheral surface of the gluing roller; the supporting assembly is provided with a glue containing cavity, the glue containing cavity is provided with an opening, and the opening faces the glue spreading roller. The glue scraping assembly is arranged between the glue containing cavity and the glue spreading roller and avoids the opening, and the glue scraping assembly is used for scraping glue on the glue spreading roller to be flat; the gluing driving part is connected to the gluing roller and used for driving the gluing roller to rotate. The gluing mechanism provided by the utility model has relatively high gluing uniformity and does not cause waste of glue solution.

Description

Technical Field

[0001] This utility model relates to the field of adhesive coating technology, and in particular to an adhesive coating mechanism. Background Technology

[0002] Lithium-ion batteries typically consist of a positive electrode, a negative electrode, and a separator between the positive and negative electrodes. The separator prevents short circuits between the positive and negative electrodes. To improve the bonding effect between the electrodes and the separator, an adhesive is applied to the surface of the separator where the positive or negative electrode needs to be bonded.

[0003] In existing technologies, a spraying device is used to spray adhesive onto the diaphragm. This device typically includes a nozzle and an adhesive pump. The pump injects adhesive into the nozzle, which then sprays the adhesive onto the diaphragm. However, the adhesive layer formed on the diaphragm by spraying has low uniformity, affecting the adhesion between the diaphragm and the electrode, and also easily leads to adhesive waste and poor reliability. Utility Model Content

[0004] The purpose of this invention is to provide a glue application mechanism that has high glue application uniformity and does not cause glue waste.

[0005] The adhesive application mechanism includes:

[0006] A glue-applying roller, wherein at least one glue groove is provided on the outer peripheral surface of the glue-applying roller;

[0007] A support assembly is provided with an adhesive cavity, the adhesive cavity having an opening facing the coating roller;

[0008] A scraper assembly is disposed between the glue-containing cavity and the glue-applying roller, avoiding the opening. The scraper assembly is used to scrape the glue on the glue-applying roller to smooth the glue liquid.

[0009] A glue-applying drive unit is connected to the glue-applying roller and is used to drive the glue-applying roller to rotate.

[0010] The beneficial effects of this utility model are:

[0011] The gluing mechanism provided by this utility model has a glue groove on the outer circumferential surface of the gluing roller, which can increase the amount of glue carried by the gluing roller, thereby increasing the amount of glue applied to the diaphragm by the gluing roller. This prevents the problem of low adhesion reliability between the diaphragm and the electrode due to insufficient glue on the diaphragm, and improves the adhesion strength between the diaphragm and the electrode. By setting a scraper component, the glue on the gluing roller can be scraped flat, so that the glue is more evenly distributed on the gluing roller, reducing the risk of empty glue areas on the gluing roller, improving the uniformity of gluing, and ensuring that the diaphragm is completely covered by glue, thereby improving the adhesion effect between the diaphragm and the electrode. In addition, the scraper component can scrape off excess glue on the gluing roller, preventing the problem of glue dripping due to excess glue on the gluing roller, avoiding glue waste, and thus reducing gluing costs. 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 of this utility model 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 the content of the embodiments of this utility model and these drawings without creative effort.

[0013] Figure 1 This is a first structural schematic diagram of the adhesive application mechanism provided in this embodiment of the utility model;

[0014] Figure 2 This is a utility model Figure 1 The BB section view shown;

[0015] Figure 3 This is a schematic diagram of the second structure of the adhesive application mechanism provided in this embodiment of the utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the coating roller provided in this embodiment of the utility model;

[0017] Figure 5 This is a utility model Figure 4 The shown is a CC section view;

[0018] Figure 6 This is a utility model Figure 5 The enlarged view at point D is shown below;

[0019] Figure 7 This is a schematic diagram of the third structure of the adhesive application mechanism provided in this embodiment of the utility model;

[0020] Figure 8 This is a schematic diagram of the fourth structure of the adhesive application mechanism provided in this embodiment of the utility model;

[0021] Figure 9This is a first structural schematic diagram of the composite winding device provided in this embodiment of the present invention;

[0022] Figure 10 This is a second structural schematic diagram of the composite winding device provided in this embodiment of the present invention;

[0023] Figure 11 This is a schematic diagram of the first structure of the first cutting mechanism provided in this embodiment of the utility model;

[0024] Figure 12 This is a schematic diagram of the second structure of the first cutting mechanism provided in this embodiment of the present invention;

[0025] Figure 13 This is an exploded view of the first cutting mechanism provided in this embodiment of the utility model;

[0026] Figure 14 This is a third structural schematic diagram of the composite winding device provided in this embodiment of the utility model;

[0027] Figure 15 This is a utility model Figure 14 The enlarged view of point A shown.

[0028] In the picture:

[0029] 100. First composite mechanism; 200. Winding mechanism;

[0030] 310. First glue application mechanism; 320. Second glue application mechanism; 330. Third glue application mechanism; 340. Fourth glue application mechanism; 1. Glue application roller; 11. Glue tank; 12. Recess; 2. Support assembly; 21. Glue receiving cavity; 211. Opening; 22. Support frame; 23. Glue container; 3. Glue scraper assembly; 31. First scraper; 32. Second scraper; 4. Glue application drive component; 5. First drive component; 6. Second drive component; 7. First guide roller; 8. Second guide roller; 9. Base; 1a. Glue tray;

[0031] 400, Second composite mechanism; 410, First composite roller; 420, Second composite roller; 430, Composite drive component;

[0032] 500. First cutting mechanism; 510. Cutting frame; 520. Cutting drive component; 530. Cutting blade; 540. Cutting conveying assembly; 541. Rotation drive component; 542. Main conveying roller; 543. Gap drive component; 544. Secondary conveying roller; 550. Support platform; 551. First arc-shaped clearance groove; 552. Support surface; 560. Support platform; 561. Second arc-shaped clearance groove; 562. Support surface; 563. Groove;

[0033] 600, Mounting housing; 700, Support frame; 710, First region; 720, Second region; 730, Third region; 800, Electrode unwinding mechanism; 900, Diaphragm unwinding mechanism; 1000, Second cutting mechanism;

[0034] 10. First diaphragm; 20. Second diaphragm; 30. Negative electrode; 40. Positive electrode. Detailed Implementation

[0035] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 based on the specific circumstances.

[0038] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or it can be located in between the component.

[0041] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] For example, this embodiment provides an adhesive coating mechanism with high coating uniformity.

[0043] like Figures 1 to 8 As shown, the glue application mechanism includes a glue application roller 1, a support assembly 2, a glue scraping assembly 3, and a glue application drive component 4.

[0044] The outer circumferential surface of the coating roller 1 is provided with at least one glue groove 11. In this embodiment, by providing a glue groove 11 on the coating roller 1, the glue groove 11 can contain glue liquid. During the process of the coating roller 1 contacting the diaphragm, the glue liquid in the glue groove 11 can adhere to the diaphragm, so that the glue liquid in the part of the diaphragm corresponding to the glue groove 11 can be more, thereby increasing the amount of glue liquid between the diaphragm and the electrode.

[0045] It should be noted that, in order to avoid wasting adhesive, the part of the adhesive roller 1 with the adhesive groove 11 is in contact with the diaphragm during adhesive application.

[0046] In this embodiment, the support component 2 is provided with a glue-containing cavity 21, which has an opening 211 facing the coating roller 1. The glue-containing cavity 21 is used to contain the glue liquid, and the glue liquid in the glue-containing cavity 21 can flow out through the opening 211 and adhere to the coating roller 1. The glue scraper component 3 is disposed between the glue-containing cavity 21 and the coating roller 1, and the glue scraper component 3 is disposed away from the opening 211 so that the glue scraper component 3 will not affect the flow of glue liquid from the opening 211 and its adhesion to the coating roller 1. The glue scraper component 3 is used to smooth the glue liquid on the coating roller 1, so that the glue liquid is evenly distributed on the outer peripheral surface of the coating roller 1.

[0047] In this embodiment, the glue application drive 4 is connected to the glue application roller 1 and is used to drive the glue application roller 1 to rotate. During the rotation of the glue application roller 1, the glue liquid adhering to the outer peripheral surface can be coated onto the diaphragm, and at the same time, the glue liquid is carried at the opening 211 to achieve continuous glue application.

[0048] For example, the glue application drive 4 includes, but is not limited to, components capable of outputting torque, such as a motor. The output end of the glue application drive 4 can be directly connected to the glue application roller 1, or the output end of the glue application drive 4 can also be connected to the glue application roller 1 via a transmission assembly. The transmission assembly includes, but is not limited to, a drive gear, a driven gear, and a transmission belt. The transmission belt is connected to the drive gear and the driven gear. The drive gear is coaxially connected to the output shaft of the glue application drive 4, and the driven gear is coaxially connected to the glue application roller 1.

[0049] The gluing mechanism provided in this embodiment has a glue groove 11 on the outer peripheral surface of the gluing roller 1 to increase the amount of glue carried by the gluing roller 1, thereby increasing the amount of glue applied to the diaphragm by the gluing roller 1. This prevents the problem of low bonding reliability between the diaphragm and the electrode due to insufficient glue on the diaphragm, and improves the bonding strength between the diaphragm and the electrode. By setting the glue scraper component 3, the glue on the gluing roller 1 can be scraped flat, so that the glue is more evenly distributed on the gluing roller 1, reducing the risk of empty glue areas on the gluing roller 1, improving the uniformity of gluing, and allowing the diaphragm to be completely covered by the glue, thereby improving the bonding effect between the diaphragm and the electrode. In addition, the glue scraper component 3 can scrape off the excess glue on the gluing roller 1 to prevent the problem of dripping due to excess glue on the gluing roller 1, avoiding glue waste, and thus reducing the gluing cost.

[0050] For example, in this embodiment, the glue groove 11 extends in an annular shape along the circumferential direction of the coating roller 1 to increase the amount of glue carried in each region in the circumferential direction of the coating roller 1, thereby ensuring that the amount of glue in each region in the length direction of the diaphragm is consistent, thus ensuring the bonding effect between the diaphragm and the electrode sheet; in addition, the annular glue groove 11 can also increase the amount of glue carried.

[0051] To further improve the uniformity of the adhesive solution on the diaphragm in the diaphragm width direction, optionally, such as Figure 3 As shown, multiple glue tanks 11 are provided, and these multiple glue tanks 11 are spaced apart along the axial direction of the coating roller 1. The axial direction of the coating roller 1 is the same as the width direction of the diaphragm. By providing multiple glue tanks 11, the amount of glue carried by each part of the coating roller 1 in the axial direction can be increased, so that the glue liquid in each area of ​​the diaphragm in the width direction is not much different, avoiding the problem of uneven distribution of glue liquid on the diaphragm, and thus preventing uneven thickness of the diaphragm and electrode after bonding.

[0052] In some optional embodiments, the plurality of glue grooves 11 includes at least two glue grooves 11 with different widths. That is, the widths of the plurality of glue grooves 11 are not exactly the same, and the placement of the glue grooves 11 with different widths can be selected according to actual needs. This embodiment does not limit this. In this way, on the one hand, the number of glue grooves 11 can be reduced by setting glue grooves 11 with larger widths; on the other hand, glue grooves 11 with smaller widths can be set at the edge positions, without all glue grooves 11 needing to be wide, which has a high degree of flexibility.

[0053] For example, the coating roller 1 includes a first coating roller area, a second coating roller area, and a third coating roller area. The first coating roller area, the second coating roller area, and the third coating roller area are arranged sequentially along the axial direction of the coating roller 1, and each of the first coating roller area, the second coating roller area, and the third coating roller area is provided with at least one glue groove 11.

[0054] In some alternative embodiments, such as Figure 1 As shown, the first and third glue roller areas are located near the two ends of the coating roller 1, and the second glue roller area is located at the center along the axial direction of the coating roller 1. In some other optional embodiments, such as Figure 3 As shown, the first, second, and third glue roller areas can all be located near one end of the coating roller 1 for applying adhesive to a narrow diaphragm.

[0055] In this embodiment, the width direction of the glue tank 11 is the same as the axial direction of the glue application roller 1. Please continue to refer to... Figure 1 or Figure 3 The width of the glue groove 11 in the second glue roller area is greater than the width of the glue groove 11 in the first glue roller area, and the width of the glue groove 11 in the second glue roller area is greater than the width of the glue groove 11 in the third glue roller area. Thus, the glue groove 11 used for applying glue to the center of the diaphragm in the width direction is wider, which on the one hand can hold more glue to ensure the amount of glue on the diaphragm, and on the other hand eliminates the need for densely packed glue grooves 11, facilitating the formation of the glue grooves 11 and the processing and manufacturing of the coating roller 1; and the glue groove 11 used for applying glue to the edges in the width direction of the diaphragm is narrower, thus ensuring sufficient glue at the edges of the diaphragm while preventing the glue from being pressed out of the diaphragm during the rolling process, thus avoiding glue waste.

[0056] For example, the width of the rubber groove 11 in both the first and third rubber roller areas ranges from 5.5mm to 6.5mm. For instance, the widths of the rubber groove 11 in the first and third rubber roller areas are 5.5mm, 5.8mm, 6mm, 6.3mm, and 6.5mm, respectively. The width of the rubber groove 11 in the second rubber roller area ranges from 12.5mm to 14mm. For instance, the widths of the rubber groove 11 in the second rubber roller area are 12.5mm, 12.8mm, 13mm, 13.2mm, 13.5mm, and 14mm, respectively.

[0057] For example, the depth of the glue tank 11 ranges from 0.8mm to 1.5mm. The depth of the glue tank 11 should not be too large, otherwise it will carry a large amount of glue at the opening 211, causing glue to drip and be wasted. The depth of the glue tank 11 should also not be too small, otherwise it will not have a good effect on improving the amount of glue carried by the coating roller 1. For example, the depth of the glue tank 11 is 0.8mm, 0.9mm, 1mm, 1.2mm, 1.5mm, etc.

[0058] To further increase the amount of adhesive applied by the coating roller 1, such as Figures 4 to 6 As shown, the wall of the glue tank 11 is provided with recesses 12 for holding the glue liquid. Because the recesses 12 are located on the wall of the glue tank 11, the glue liquid in the recesses 12 can be flung out during the rotation of the coating roller 1, thus adhering to the diaphragm and increasing the amount of glue. It should be noted that, since the glue tank 11 is relatively shallow, in this embodiment, the recesses 12 are located at the bottom of the glue tank 11.

[0059] The shape of the recess 12 affects the efficiency of adhesive entering and exiting the recess 12. Optionally, this embodiment provides a recess 12, such as... Figure 6 As shown, the recess 12 is hemispherical, and the diameter r of the recess 12 ranges from 0.1mm to 0.3mm. The diameter of the recess 12 cannot be too large, as this would store a large amount of adhesive, resulting in excess adhesive on the diaphragm and wasting it; the diameter of the recess 12 cannot be too small, as this would increase the difficulty of manufacturing the recess 12. For example, the diameter range of the recess 12 is 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, etc.

[0060] It is understood that the shape of the recess 12 is not limited to a hemispherical shape, but can also be square, cylindrical, etc. This embodiment does not limit this.

[0061] Understandably, each glue tank 11 has multiple recesses 12 on its tank wall to increase the amount of glue carried in each glue tank 11.

[0062] For example, the wall of the glue tank 11 is provided with multiple recesses 12, which are arranged in multiple rows along the axial direction of the coating roller 1, with each row including multiple recesses 12. The center distance between two adjacent rows of recesses 12 ranges from 1mm to 1.5mm. The center distance between two adjacent rows of recesses 12 is used to characterize the density of the recesses 12 along the axial direction of the coating roller 1. It should be noted that the center distance between two adjacent rows of recesses 12 cannot be too large, as this would reduce the number of rows of recesses 12 and affect the amount of glue carried by the coating roller 1; the center distance between two adjacent rows of recesses 12 cannot be too small, as this would increase the manufacturing difficulty of the recesses 12 and lead to excessive glue carried by the coating roller 1, resulting in glue waste. For example, the center distance between two adjacent rows of recesses 12 can be 1mm, 1.1mm, 1.2mm, 1.4mm, 1.5mm, etc.

[0063] Optionally, such as Figure 5 As shown, in the same row of recesses 12, the central angle corresponding to the arc between two adjacent recesses 12 in the circumferential direction of the coating roller 1 is R, where the value of R ranges from 6.5° to 8°. The central angle corresponding to the arc between two adjacent recesses 12 in the circumferential direction of the coating roller 1 represents the density of the recesses 12 in the circumferential direction of the coating roller 1. It should be noted that the central angle corresponding to the arc between two adjacent recesses 12 in the circumferential direction of the coating roller 1 in the same row of recesses 12 should not be too large, as this would reduce the number of recesses 12 in each row, affecting the amount of adhesive carried by the coating roller 1; conversely, the central angle corresponding to the arc between two adjacent recesses 12 in the circumferential direction of the coating roller 1 in the same row of recesses 12 should not be too small, as this would increase the manufacturing difficulty of the recesses 12 and lead to excessive adhesive carried by the coating roller 1, resulting in waste of adhesive. For example, the value of R can be 6.5°, 6.8°, 7°, 7.2°, 7.5°, 8°, etc.

[0064] For example, such as Figure 4 As shown, the middle adhesive groove 11 has 12 rows of recesses 12, the center distance between two adjacent rows of recesses 12 is 1.2 mm, and the value of R is 7.2°. The two adhesive grooves 11 on both sides of the middle adhesive groove 11 have 6 rows of recesses 12, the center distance between two adjacent rows of recesses 12 is 1.2 mm, and the value of R is 7.2°.

[0065] Optionally, the diameter of the coating roller 1 can be in the range of 45mm-55mm, for example, the diameter of the coating roller 1 can be 45mm, 48mm, 49.8mm, 50.2mm, 55mm, etc.

[0066] The distance between the coating roller 1 and the opening 211 affects the amount of adhesive applied to the coating roller 1. Optionally, such as Figure 2 and Figure 3As shown, the adhesive application mechanism also includes a first driving member 5. The support assembly 2 includes a support frame 22 and an adhesive container 23 disposed on the support frame 22. An adhesive cavity 21 is disposed on the adhesive container 23. The first driving member 5 is connected to the adhesive container 23 and is used to drive the adhesive container 23 to move closer to or away from the adhesive application roller 1, thereby adjusting the distance between the opening 211 and the adhesive application roller 1. When the distance between the opening 211 and the adhesive application roller 1 is large, the contact area between the adhesive application roller 1 and the adhesive at the opening 211 is small, resulting in a decrease in the amount of adhesive applied to the adhesive application roller 1. When the distance between the opening 211 and the adhesive application roller 1 is small, the contact area between the adhesive application roller 1 and the adhesive at the opening 211 is large, resulting in an increase in the amount of adhesive applied to the adhesive application roller 1.

[0067] For example, the first drive member 5 is disposed on the support frame 22 and connected to the side of the adhesive container 23 facing away from the coating roller 1. The first drive member 5 includes, but is not limited to, linear drive components such as cylinders.

[0068] To improve the flexibility of the coating roller 1, in some optional embodiments, such as Figure 2 and Figure 3 As shown, the coating roller 1, the scraper assembly 3, and the coating drive component 4 are all mounted on the support assembly 2. Specifically, the coating roller 1, the scraper assembly 3, and the coating drive component 4 are all mounted on the support frame 22. For example, the coating roller 1 can be rotatably mounted on the support frame 22 to improve the stability of the rotation of the coating roller 1.

[0069] like Figure 3 As shown, the adhesive coating mechanism also includes a second drive member 6, which is connected to the support assembly 2 and is used to drive the support assembly 2 to move, thereby moving the adhesive coating roller 1 closer to or away from the object to be coated (e.g., a diaphragm), and adjusting the distance between the adhesive coating roller 1 and the object to be coated. When it is not necessary to apply adhesive to the diaphragm, the second drive member 6 can drive the adhesive coating roller 1 to move away from the object to be coated, and the diaphragm continues to be conveyed, thus forming a glue-free area on the diaphragm.

[0070] For example, the second driving component 6 is disposed on the base 9. The second driving component 6 includes, but is not limited to, linear drive components such as cylinders. In this embodiment, the support frame 22 of the support assembly 2 can be slidably connected to the base 9 through a guide rail slider structure to ensure the moving direction and stability of the support assembly 2. For example, the second driving component 6 can be directly connected to the support assembly 2, or the second driving component 6 can also be connected to the support assembly 2 through a transmission component; this embodiment does not limit this.

[0071] Optionally, such as Figure 2 and Figure 7 As shown, the adhesive scraping assembly 3 includes a first scraper 31 and a second scraper 32 disposed opposite to each other, both of which are connected to the support assembly 2. Both the first scraper 31 and the second scraper 32 are used to smooth the adhesive on the coating roller 1.

[0072] In some alternative embodiments, such as Figure 2 As shown, the first scraper 31 and the second scraper 32 can cooperate with the support component 2 to form an adhesive cavity 21, and an opening 211 of the adhesive cavity 21 is formed between the first scraper 31 and the second scraper 32.

[0073] In some other alternative embodiments, the adhesive body 23 of the support component 2 forms an adhesive cavity 21 separately, and the gap between the first scraper 31 and the second scraper 32 communicates with the opening 211 of the adhesive cavity 21, so that the adhesive overflows from the opening 211, flows through the gap between the first scraper 31 and the second scraper 32, contacts the coating roller 1, and adheres to the coating roller 1.

[0074] To improve the adhesive application effect of the first scraper 31 and the second scraper 32, such as Figure 2 As shown, the lower end of the first scraper 31 and the upper end of the second scraper 32 are both inclined toward the glue-applying roller 1 and both have pointed tips. This prevents interference between the first scraper 31 and the second scraper 32 and the glue-applying roller 1, and the pointed tips can guide the scraped glue liquid, making it easier for the glue liquid to be recycled into the glue-receiving cavity 21.

[0075] When there is too much adhesive on the coating roller 1, it will drip off under gravity. Based on this, as follows: Figure 3 or Figure 7 As shown, the glue coating mechanism also includes a glue tray 1a, which is located below the glue coating roller 1 and is used to collect the glue dripping from the glue coating roller 1 and the opening 211, so as to facilitate the recycling and reuse of the glue.

[0076] To further improve the coating effect on the diaphragm, optionally, such as Figure 8 As shown, the adhesive coating mechanism also includes a first guide roller 7 and a second guide roller 8. Both the first guide roller 7 and the second guide roller 8 are used to wrap around the object to be coated (e.g., a diaphragm or a structure composed of two diaphragms and two electrode sheets). The first guide roller 7 and the adhesive coating roller 1 are configured to be located on one side of the object to be coated, and the second guide roller 8 is configured to be located on the other side of the object, allowing the object to be supported and guided by the first guide roller 7 and the second guide roller 8. The portion of the object to be coated located between the first guide roller 7 and the second guide roller 8 is tangent to the adhesive coating roller 1, allowing the adhesive coating roller 1 to uniformly coat the object with adhesive. The contact area between the adhesive coating roller 1 and the object remains consistent, ensuring a consistent amount of adhesive applied to all areas of the object, further improving the uniformity of the adhesive amount. Exemplarily, the portion of the object to be coated located between the first guide roller 7 and the second guide roller 8 extends vertically.

[0077] This embodiment also provides a composite winding device for composite electrode sheets and separators, and for winding the composite electrode sheets and separators to form a battery cell.

[0078] It should be noted that the battery cell in this embodiment includes two electrodes and two separators. The two separators and the two electrodes are alternately arranged and bonded to each other by an adhesive layer. The two electrodes are a positive electrode and a negative electrode, and the two separators are a first separator and a second separator. The stacking order of the positive electrode, negative electrode, first separator, and second separator is negative electrode, first separator, positive electrode, and second separator. During winding, the second separator is located in the inner ring.

[0079] like Figure 9 and Figure 10 As shown, the composite winding device includes four adhesive coating mechanisms, a first composite mechanism 100, and a winding mechanism 200. The four adhesive coating mechanisms correspond one-to-one with the four surfaces of the two separators. Each adhesive coating mechanism is used to apply an adhesive layer to the corresponding surface, ensuring that both surfaces of each separator have an adhesive layer. This facilitates bonding between the separator and the electrode, as well as between different layers of the battery cell, via the adhesive layer. The adhesive coating mechanism in this embodiment is the one described above.

[0080] In this embodiment, the first composite mechanism 100 is used to composite two electrodes and two separators. Before being conveyed to the first composite mechanism 100, the two electrodes and two separators are stacked in a specific order. After passing through the first composite mechanism 100, the two electrodes and two separators can adhere to each other, thereby ensuring that the relative positions of the two electrodes are fixed, allowing the battery cell to function normally. In this embodiment, the winding mechanism 200 is located downstream of the first composite mechanism 100. Specifically, the winding mechanism 200 is located downstream of the first composite mechanism 100 in the electrode conveying direction. The winding mechanism 200 is used to wind the composited two electrodes and two separators to form a wound battery cell.

[0081] For example, the first composite mechanism 100 can be a structure found in the prior art. For instance, the first composite mechanism 100 includes two composite rollers arranged opposite to each other and capable of rolling two electrode sheets and two diaphragms to achieve composite bonding. Of course, it is understood that the first composite mechanism 100 can also achieve the bonding between the two electrode sheets and the two diaphragms through a composite plate, and this embodiment does not limit this.

[0082] Optionally, the winding mechanism 200 can be a winding needle in the prior art, which will not be described in detail in this embodiment.

[0083] The composite winding device provided in this embodiment, by setting four adhesive coating mechanisms, can coat each surface of the two diaphragms with an adhesive layer, making each surface of the two diaphragms adhesive. One diaphragm is used to bond two electrodes with different polarities on both sides, and the other diaphragm is bonded to one electrode on one side, while the other side can bond two adjacent layers of the battery cell during the winding process. This allows the diaphragm located between the two electrodes to be bonded to both electrodes without relative movement. Adjacent layers of the battery cell can also be bonded to each other through the adhesive layer, thereby improving the compactness of the wound battery cell, reducing the probability of the battery cell becoming loose, and improving the integrity and strength of the battery cell.

[0084] Furthermore, by setting up four gluing mechanisms, the four gluing mechanisms can perform gluing work simultaneously, which meets the requirements of continuous operation of the composite winding device and improves the efficiency of composite winding of battery cells.

[0085] For example, the composite winding device further includes two second composite mechanisms 400, each corresponding to an electrode and a separator, and each second composite mechanism 400 is used to composite a corresponding electrode and a separator. Specifically, one second composite mechanism 400 is used to composite the negative electrode 30 and the first separator 10, and the other second composite mechanism 400 is used to composite the positive electrode 40 and the second separator 20.

[0086] For ease of distinction, in this embodiment, as Figure 10 As shown, the four coating mechanisms are a first coating mechanism 310, a second coating mechanism 320, a third coating mechanism 330, and a fourth coating mechanism 340. The first coating mechanism 310 and the second coating mechanism 320 are used to coat the two surfaces of one of the two separators with an adhesive layer. In the electrode conveying direction, one of the two second composite mechanisms 400 is located downstream of the first coating mechanism 310 and is used to composite the negative electrode 30 and the first separator 10. Composite formation immediately after coating improves the adhesion between the negative electrode 30 and the first separator 10 and reduces the likelihood of dust and debris depositing on the adhesive layer. The first coating mechanism 310 coats one surface of the first separator 10 with an adhesive layer, and the second coating mechanism 320 is located downstream of this second composite mechanism 400 to coat the other surface of the first separator 10, facilitating adhesion between the other surface of the first separator 10 and the positive electrode 40. It should be noted that in this embodiment, in the conveying direction of the negative electrode sheet 30, one of the two second composite mechanisms 400 is located downstream of the first coating mechanism 310 and upstream of the second coating mechanism 320.

[0087] Optionally, in the electrode conveying direction, the second adhesive coating mechanism 320 is located upstream of the first composite mechanism 100, such that after the second adhesive coating mechanism 320 applies adhesive to the surface of the first separator 10 facing the positive electrode 40, the first composite mechanism 100 composites the two electrodes and the two separators, so that the positive electrode 40 is bonded to the second separator 20. It should be noted that, in this embodiment, in the conveying direction of the negative electrode 30, the second adhesive coating mechanism 320 is located upstream of the first composite mechanism 100.

[0088] Please continue reading Figure 10 The third coating mechanism 330 and the fourth coating mechanism 340 are used to coat the two surfaces of the other of the two separators with a coating layer. In the electrode conveying direction, the other of the two second composite mechanisms 400 is located downstream of the third coating mechanism 330 and upstream of the second coating mechanism 320. In this embodiment, in the positive electrode 40 conveying direction, the other of the two second composite mechanisms 400 is located downstream of the third coating mechanism 330 and upstream of the second coating mechanism 320. The other of the two second composite mechanisms 400 is used to composite the positive electrode 40 and the second separator 20. The two second composite mechanisms 400, in conjunction with the three coating mechanisms, can coat the two surfaces of the first separator 10 and one surface of the second separator 20 with a coating layer before the first composite mechanism 100, so that the negative electrode 30, the first separator 10, the positive electrode 40 and the second separator 20 can be firmly bonded together.

[0089] In some alternative embodiments, in the electrode conveying direction, the fourth coating mechanism 340 is located downstream of the first composite mechanism 100 and upstream of the winding mechanism 200. The fourth coating mechanism 340 is used to coat the surface of the second separator 20 facing away from the positive electrode 40 with a coating layer, so that during winding, the adjacent layers of the cell can be firmly bonded together.

[0090] It should be noted that, as Figure 10 As shown, the distance between the first coating mechanism 310 and the second composite mechanism 400 for bonding the first separator 10 and the negative electrode 30 is small; the distance between the second coating mechanism 320 and the first composite mechanism 100 is small; the distance between the third coating mechanism 330 and the second separator 20 and the positive electrode 40 is small; and the distance between the fourth coating mechanism 340 and the winding mechanism 200 is small. This allows the separator to be bonded as quickly as possible after coating, the properties of the adhesive do not change significantly, it can maintain high viscosity, and it is free from impurities and has high purity, thereby further improving the bonding effect.

[0091] In this embodiment, the electrode material is supplied continuously, but the electrodes bonded to the separator are in segments, not continuously. Therefore, the electrodes need to be cut before being laminated with the corresponding separator. Figure 9 and Figure 11 As shown, the composite winding device also includes two first cutting mechanisms 500. Each of the two first cutting mechanisms 500 corresponds one-to-one with one of the two second composite mechanisms 400. In the electrode conveying direction, each first cutting mechanism 500 is located upstream of a second composite mechanism 400. Both first cutting mechanisms 500 are used to cut electrode sheets; one first cutting mechanism 500 is used to cut the positive electrode sheet 40, and the other first cutting mechanism 500 is used to cut the negative electrode sheet 30.

[0092] In some optional embodiments, the first cutting mechanism 500 can be docked with the second composite mechanism 400 to shorten the conveying distance of the cut electrode sheet, and after the cut electrode sheet is bonded to the diaphragm, the electrode sheet and the diaphragm can be conveyed together.

[0093] For example, such as Figure 11 As shown, the first cutting mechanism 500 includes a cutting frame 510, a cutting drive 520, a cutting blade 530, and a cutting conveying assembly 540.

[0094] In this embodiment, a cutting drive 520 is disposed on the cutting frame 510 and is used to drive the cutting blade 530 to move towards or away from the electrode sheet, thereby controlling the cutting blade 530 to cut the electrode sheet. A cutting conveying assembly 540 is used to convey the electrode sheet. Exemplarily, the cutting drive 520 drives the cutting blade 530 to cut the electrode sheet into a composite portion (not shown in the figure) and a remaining portion (not shown in the figure). The composite portion refers to the portion to be composited with the diaphragm. In the electrode sheet conveying direction, the cutting conveying assembly 540 is disposed upstream of the cutting blade 530 and is used to intermittently convey the remaining portion, so that there is a gap between the composite portions composited on the diaphragm. In this embodiment, the second composite mechanism 400 is used to composite the diaphragm and the composite portion so that the composite portion is adhered to the diaphragm. Exemplarily, the cutting drive 520 can be a linear drive component such as a cylinder, and this embodiment is not limited to this.

[0095] It should be noted that before the electrode is cut, the end of the electrode with the cut surface is already in contact with the corresponding second composite mechanism 400. After the electrode is cut, the composite part moves under the traction of the second composite mechanism 400 and is composited with the diaphragm. The remaining part is conveyed by the cutting and conveying assembly 540 after a period of time, so that the cut surface of the remaining part at the cutter 530 can move to contact the corresponding second composite mechanism 400. When the length of the electrode on the side of the cutter 530 facing the second composite mechanism 400 meets the requirements, the cutter 530 drive drives the cutter 530 to cut the electrode, so as to achieve the composite of each composite part with the diaphragm.

[0096] This embodiment provides a cutting and conveying assembly 540. In some alternative embodiments, such as... Figure 12 As shown, the cutting and conveying assembly 540 includes a rotation drive 541, a main conveying roller 542, a gap drive 543, and a secondary conveying roller 544. Both the rotation drive 541 and the gap drive 543 are mounted on the cutting frame 510. The rotation drive 541 drives the main conveying roller 542 to rotate. The secondary conveying roller 544 is positioned opposite the main conveying roller 542 in the direction of the cutter 530's movement, and the secondary conveying roller 544 and the main conveying roller 542 cooperate to clamp the conveyed electrode sheet. The gap drive 543 drives the secondary conveying roller 544 to move closer to or further away from the main conveying roller 542, adjusting the gap between the main conveying roller 542 and the secondary conveying roller 544. This allows for the application of electrode sheets with different thicknesses, and when the electrode sheet does not need to be conveyed through the cutting and conveying assembly 540, the distance between the main conveying roller 542 and the secondary conveying roller 544 can be adjusted to be greater than the sum of the thicknesses of the electrode sheet and the diaphragm.

[0097] For example, the rotation drive 541 can be a component that can generate torque, such as a motor, and the gap drive 543 can be a linear drive component, such as a cylinder. This embodiment does not limit this.

[0098] To prevent the electrode between the cutter 530 and the second composite mechanism 400 from deforming under gravity, such as Figure 11 As shown, the first cutting mechanism 500 also includes a support platform 560, which is connected to the cutting frame 510. In the electrode conveying direction, the support platform 560 is located downstream of the cutter 530. The support platform 560 is used to support the electrode between the cutter 530 and the second composite mechanism 400 to prevent the electrode from bending and deforming under the action of gravity, thus ensuring the composite effect.

[0099] For example, the support platform 560 has a support surface 562 for supporting the electrode, so that the electrode can be supported between the cutter 530 and the second composite mechanism 400 by the support platform 560.

[0100] Optionally, the support platform 560 has a second arc-shaped clearance groove 561 at the end opposite to the cutter 530 for avoiding the second composite mechanism 400. For example... Figure 15 As shown, the second composite mechanism 400 includes a first composite roller 410 and a second composite roller 420 disposed opposite to each other. The shape of the second arc-shaped clearance groove 561 matches the shape of the first composite roller 410, and a portion of the first composite roller 410 is located in the second arc-shaped clearance groove 561. However, the support platform 560 does not cover the highest point of the first composite roller 410, so as not to affect the cooperation between the first composite roller 410 and the second composite roller 420 in clamping and conveying the electrode sheet.

[0101] For example, such as Figure 15 As shown, the second composite mechanism 400 also includes a composite drive member 430, which is driven to connect to the second composite roller 420 and is used to drive the second composite roller 420 to move closer to or away from the first composite roller 410 to adjust the gap between the first composite roller 410 and the second composite roller 420.

[0102] In some optional embodiments, the support surface 562 of the support platform 560 for supporting the electrode sheet is tangent to the first composite roller 410, such that the support surface 562 of the support platform 560 and the part of the first composite roller 410 used to contact the electrode sheet are coplanar. The support platform 560 can be as close as possible to the highest point of the first composite roller 410 used to contact the electrode sheet, realizing a smooth transition between the support platform 560 and the first composite roller 410. This ensures that the electrode sheet can be supported by the support platform 560 before it is conveyed to contact the first composite roller 410, reducing the probability of wrinkles in the electrode sheet and improving the conveying effect of the electrode sheet.

[0103] Optionally, the side of the support surface 562 closest to the cutter 530 is curved to avoid the cutter 530, allowing the cutter 530 to descend smoothly to the cutting position and avoiding interference between the support platform 560 and the cutter 530.

[0104] In some alternative embodiments, please continue to refer to Figure 11 The support surface 562 is provided with at least one groove 563. By providing the groove 563, it is possible to ensure that the support surface 562 and the electrode have a small contact area and a small frictional force, which reduces the difficulty of the second composite mechanism 400 pulling the electrode. In this embodiment, multiple grooves 563 are provided, and the multiple grooves 563 are spaced apart along the width direction of the support platform 560. Each groove 563 extends to the side of the support platform 560 near the cutter 530.

[0105] For example, such as Figures 13 to 15 As shown, the first cutting mechanism 500 also includes a support platform 550. The support platform 550 is connected to the cutting frame 510. Furthermore, in the electrode conveying direction, the support platform 550 is located upstream of the cutter 530. The support platform 550 is used to support the electrode between the cutting conveying assembly 540 and the cutter 530, so that the electrode can be smoothly conveyed to the cutter 530 and will not bend or deform under the action of gravity.

[0106] In some optional embodiments, the end of the support platform 550 away from the cutter 530 is provided with a first arc-shaped clearance groove 551, and part of the conveying main roller 542 is located in the first arc-shaped clearance groove 551, so that there can be an overlap between the support platform 550 and the conveying main roller 542, but the support platform 550 will not cover the highest point of the conveying main roller 542, so as not to affect the cooperation between the conveying main roller 542 and the conveying auxiliary roller 544 to clamp the conveying electrode sheet.

[0107] Optionally, the bearing surface 552 of the support platform 550 for supporting the electrode sheet is tangent to the main conveying roller 542, so that the bearing surface 552 of the support platform 550 and the part of the main conveying roller 542 that is in contact with the electrode sheet are coplanar. The support platform 550 can be as close as possible to the highest point of the main conveying roller 542, so that the electrode sheet can be supported by the support platform 550 in time after it is separated from the main conveying roller 542. This achieves a smooth transition between the support platform 550 and the main conveying roller 542, so that the electrode sheet can be located on the same plane during the conveying process, reducing the probability of the electrode sheet wrinkling and improving the conveying effect of the electrode sheet.

[0108] For example, such as Figure 9 As shown, the composite winding device also includes four mounting shells 600. Each of the four mounting shells 600 corresponds to one of the four adhesive application mechanisms, with each adhesive application mechanism housed within a mounting shell 600. Each mounting shell 600 has an inlet and an outlet for the diaphragm to pass through. The inlet and outlet can be located on two opposite walls of the mounting shell 600, or on two adjacent walls; this embodiment does not limit the location of the inlet and outlet.

[0109] Optionally, each mounting housing 600 is provided with an adsorption element (not shown in the figure) to adsorb gases containing adhesive molecules within the mounting housing 600, thereby preventing the escape of such gases. For example, the adsorption element may include, but is not limited to, activated carbon.

[0110] In this embodiment, the composite winding device further includes an electrode unwinding mechanism 800, a diaphragm unwinding mechanism 900, and a second cutting mechanism 1000. Two electrode unwinding mechanisms 800 and diaphragm unwinding mechanisms 900 are provided: one electrode unwinding mechanism 800 for unwinding and conveying the positive electrode 40, and the other electrode unwinding mechanism 800 for unwinding and conveying the negative electrode 30. One diaphragm unwinding mechanism 900 is used for unwinding and conveying the first diaphragm 10, and the other diaphragm unwinding mechanism 900 is used for unwinding and conveying the second diaphragm 20. The second cutting mechanism 1000 is located downstream of the fourth adhesive coating mechanism 340 and upstream of the winding mechanism 200, and is used to cut the two composite electrodes and two diaphragms after the diameter of the battery cell at the winding mechanism 200 reaches the required value. For example, both the electrode unwinding mechanism 800 and the diaphragm unwinding mechanism 900 include an unwinding component for unwinding and a conveying assembly for conveying, the conveying assembly including but not limited to conveying rollers, guide rollers, motors, etc. As another example, the second cutting mechanism 1000 can be a cutting device in the prior art, and this embodiment does not limit it to this.

[0111] In some alternative embodiments, such as Figure 10 As shown, the composite winding device also includes a support frame 700, and the first composite mechanism 100, the second composite mechanism 400, the first cutting mechanism 500, the mounting shell 600, the electrode unwinding mechanism 800, the diaphragm unwinding mechanism 900, the second cutting mechanism 1000, and four adhesive application mechanisms are all mounted on the support frame 700. The positions of the first composite mechanism 100, the second composite mechanism 400, the first cutting mechanism 500, the mounting shell 600, the electrode unwinding mechanism 800, the diaphragm unwinding mechanism 900, the second cutting mechanism 1000, and the four adhesive application mechanisms on the support frame 700 can be designed according to actual needs.

[0112] In this embodiment, as Figure 9 and Figure 10 As shown, the support frame 700 includes a first region 710, a second region 720, and a third region 730 arranged sequentially. The unwinding components of one of the two electrode unwinding mechanisms 800, one of the two diaphragm unwinding mechanisms 900, and the first adhesive coating mechanism 310 are all located in the first region 710. The first composite mechanism 100, two second composite mechanisms 400, the second adhesive coating mechanism 320, and the fourth adhesive coating mechanism 340 are all located in the second region 720. The unwinding components of the other electrode unwinding mechanism 800, the other diaphragm unwinding mechanism 900, and the third adhesive coating mechanism 330 are all located in the third region 730. This design fully utilizes the space on the support frame 700, optimizes the electrode conveying length, and ensures a more balanced stress distribution on the support frame 700.

[0113] In this embodiment, the adhesive coating mechanism can be a spray coating structure or a roller coating structure in the prior art; this embodiment does not limit it to either.

[0114] The composite winding device provided in this embodiment operates as follows: two electrode unwinding mechanisms 800 and two diaphragm unwinding mechanisms 900 unwind simultaneously. The first diaphragm 10 is conveyed to the first adhesive coating mechanism 310, which applies adhesive to one surface of the first diaphragm 10. The negative electrode 30 is conveyed to a first cutting mechanism 500, where a cutting drive 520 drives a cutter 530 to cut the negative electrode 30, resulting in a composite portion and a remaining portion of the negative electrode 30. The adhesive-coated first diaphragm 10 and the composite portion simultaneously reach a second composite mechanism 400, where they are composited by the clamping of the first composite roller 410 and the second composite roller 420, causing the negative electrode 30 to adhere to one surface of the first diaphragm 10.

[0115] Simultaneously, the second separator 20 is conveyed to the third adhesive coating mechanism 330, which applies adhesive to one surface of the second separator 20. The positive electrode 40 is conveyed to another first cutting mechanism 500, where a cutting drive 520 drives a cutter 530 to cut the positive electrode 40. A second composite mechanism 400 then bonds the positive electrode 40 to one surface of the second separator 20.

[0116] Next, the negative electrode 30 and the first separator 10 are conveyed to the second coating mechanism 320, and the positive electrode 40 and the second separator 20 are conveyed to the first composite mechanism 100. The second coating mechanism 320 coats the other surface of the first separator 10 with adhesive. After that, the coated first separator 10 and the negative electrode 30 are conveyed to the first composite mechanism 100. The first separator 10, the negative electrode 30, the positive electrode 40, and the second separator 20 are composited through the first composite mechanism 100, and the positive electrode 40 is bonded to the other surface of the first separator 10. During this process, the composite roller of the first composite mechanism 100 contacts the other surface of the second separator 20 and the surface of the negative electrode 30 facing away from the first separator 10. There is no adhesive on the other surface of the second separator 20 and the surface of the negative electrode 30 facing away from the first separator 10, ensuring the composite effect.

[0117] After the first composite mechanism 100 completes the composite process, the two diaphragms and two electrodes are conveyed to the fourth adhesive coating mechanism 340. The fourth adhesive coating mechanism 340 applies adhesive to the other surface of the second diaphragm 20. The coated structure is then conveyed to the winding mechanism 200, where it is wound to form a battery cell. Each layer of the battery cell is bonded together by the adhesive layer on the other surface of the second diaphragm 20. It should be noted that after the fourth adhesive coating mechanism 340 completes the adhesive coating, the guide rollers or conveyor rollers of the conveying assembly do not contact the other surface of the second diaphragm 20, but rather contact the surface of the negative electrode 30 facing away from the first diaphragm 10, so as not to stick.

[0118] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A gluing mechanism, characterized by, The application relates to a glue coating mechanism. The glue coating mechanism comprises a glue coating roller (1), an outer circumferential surface of the glue coating roller (1) is provided with at least one glue groove (11); a supporting assembly (2) is provided with a glue containing cavity (21), the glue containing cavity (21) is provided with an opening (211) facing the glue coating roller (1); a glue scraping assembly (3) is arranged between the glue containing cavity (21) and the glue coating roller (1) and avoids the opening (211), the glue scraping assembly (3) is used for scraping the glue liquid on the glue coating roller (1); and a glue coating driving element (4) is connected to the glue coating roller (1) and is used for driving the glue coating roller (1) to rotate. The glue groove (11) extends along the circumferential direction of the glue coating roller (1) and is annular. The glue groove (11) is provided with a plurality of glue grooves (11) which are arranged along the axial direction of the glue coating roller (1) and are spaced apart; and the plurality of glue grooves (11) comprise at least two glue grooves (11) with different widths. The glue coating roller (1) comprises a first glue roller area, a second glue roller area and a third glue roller area, the first glue roller area, the second glue roller area and the third glue roller area are sequentially arranged along the axial direction of the glue coating roller (1), and the first glue roller area, the second glue roller area and the third glue roller area are all provided with the glue groove (11).

2. The gluing mechanism according to claim 1, wherein The width of the glue groove (11) of the second glue roller area is greater than the width of the glue groove (11) of the first glue roller area; and / or the width of the glue groove (11) of the second glue roller area is greater than the width of the glue groove (11) of the third glue roller area. The width of the glue groove (11) of the first glue roller area and the third glue roller area ranges from 5.5 mm to 6.5 mm; and the width of the glue groove (11) of the second glue roller area ranges from 12.5 mm to 14 mm.

3. The gluing mechanism according to claim 2, wherein The groove wall of the glue groove (11) is provided with a pit (12). The pit (12) is semispherical, and the diameter of the pit (12) ranges from 0.1 mm to 0.3 mm.

4. The gluing mechanism according to claim 3, wherein The groove wall of the glue groove (11) is provided with a plurality of pits (12), and the plurality of pits (12) are arranged in multiple rows along the axial direction of the glue coating roller (1).

5. The gluing mechanism according to any one of claims 1-4, characterized in that, The center distance of two adjacent rows of the pits (12) ranges from 1 mm to 1.5 mm.

6. The gluing mechanism according to claim 5, wherein In the same row of the pits (12), the arc line between two adjacent pits (12) in the circumferential direction of the glue coating roller (1) corresponds to a central angle ranging from 6.5 degrees to 8 degrees.

7. The gluing mechanism according to claim 5, wherein The glue coating mechanism further comprises a first driving element (5), the supporting assembly (2) comprises a supporting frame (22) and a glue containing body (23) arranged on the supporting frame (22), the glue containing cavity (21) is arranged on the glue containing body (23), and the first driving element (5) is connected to the glue containing body (23) and is used for driving the glue containing body (23) to move close to or away from the glue coating roller (1). ​ ​ 8. The gluing mechanism according to any one of claims 1-4, wherein, ​ 9. The gluing mechanism according to any one of claims 1-4, wherein, The glue applying roller (1), the glue scraping assembly (3) and the glue applying driving member (4) are arranged on the support assembly (2), and the glue applying mechanism further comprises a second driving member (6) connected to the support assembly (2) and used for driving the support assembly (2) to move so as to drive the glue applying roller (1) to move close to or away from the object to be glued.

10. The gluing mechanism according to any one of claims 1-4, wherein, The glue applying mechanism further comprises a first guide roller (7) and a second guide roller (8), both of which are arranged around the object to be glued, the first guide roller (7) and the glue applying roller (1) are arranged on one side of the object to be glued, and the second guide roller (8) is arranged on the other side of the object to be glued, and the part of the object to be glued between the first guide roller (7) and the second guide roller (8) is tangent to the glue applying roller (1).

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