Gluing device and pole piece processing equipment
The coating device, which combines coating rollers and transfer rollers, solves the problem of slow coating speed in dispensing machines, enabling continuous coating of electrode sheets and improving the efficiency of battery cell production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SVOLT ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-24
AI Technical Summary
In existing technologies, the speed at which dispensing machines can coat electrodes is limited, resulting in low battery production efficiency.
The adhesive coating device, which uses a coating roller and a transfer roller in combination, peels off the insulating adhesive from the coating roller through the raised structure on the transfer roller and coats it onto the electrode sheet. Combined with the scraping component to adjust the adhesive layer thickness and the support roller to provide stable support, continuous adhesive coating is achieved.
It improves the efficiency of electrode coating, ensures the consistency and accuracy of coating effect, and enhances the efficiency of cell production.
Smart Images
Figure CN224542136U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery manufacturing technology, and in particular to a coating device and electrode processing equipment. Background Technology
[0002] During battery production, pressure treatment is required. Because of the thickness difference between the edges of the positive and negative electrodes, the electrolyte membrane between them can easily be damaged during this process. Therefore, insulating adhesive needs to be applied to the edges of the positive electrode to eliminate this thickness difference.
[0003] Currently, dispensing machines are commonly used to apply adhesive to the electrodes. The dispensing head of the machine is driven to move along the edge of the electrode to apply insulating adhesive. However, the speed of the dispensing head movement and the adhesive application are limited, resulting in low work efficiency and hindering the improvement of battery production efficiency. Utility Model Content
[0004] In view of this, the present application aims to provide a coating device to improve the efficiency of coating electrodes.
[0005] To achieve the above objectives, the technical solution of this application is implemented as follows: An adhesive application apparatus includes an application roller and a transfer roller that are driven to rotate and arranged adjacent to each other, and a slurry tank; The transfer roller is arranged adjacent to and located on the side of the electrode sheet to be coated with adhesive; The slurry tank contains insulating adhesive, and part of the outer peripheral surface of the coating roller is immersed in the insulating adhesive in the slurry tank; The transfer roller has a raised structure on its outer periphery. As the transfer roller rotates, the insulating adhesive on the coating roller can be peeled off by the raised structure and adhered to the raised structure. The insulating adhesive is also coated on the preset area of the electrode as the raised structure moves.
[0006] Furthermore, the rotation direction of the transfer roller is the same as that of the coating roller.
[0007] Furthermore, the raised structures are multiple structures spaced apart circumferentially along the transfer roller, and the end faces of the raised structures are provided with patterns and / or grooves.
[0008] Furthermore, a glue collection groove corresponding to the protruding structure is formed in the recess on the outer periphery of the coating roller, and the coating roller and the transfer roller rotate synchronously in opposite directions; As the transfer roller rotates, the protruding structure can be inserted into the adhesive collection tank and pick up the insulating adhesive in the adhesive collection tank.
[0009] Furthermore, it also includes a scraping assembly that can be operated to scrape the insulating adhesive off the coating roller to adjust the thickness of the insulating adhesive on the coating roller.
[0010] Furthermore, the scraping assembly includes a scraper roller having scrapers protruding outward from the coating roller, and the width of the scrapers gradually decreases along the direction close to the coating roller, and the rotation angle of the scraper roller can be adjusted.
[0011] Furthermore, it also includes a rotatable support roller, with a gap between the support roller and the transfer roller for the electrode to pass through, and the electrode overlapping the support roller.
[0012] Furthermore, it also includes a coating unit having a die head disposed toward the transfer roller for applying release agent onto the raised structure.
[0013] Compared with related technologies, this application has the following advantages: (1) The coating device described in this application, through the cooperation of the coating roller and the transfer roller, when the transfer roller rotates, the protruding structure can peel off the insulating adhesive on the coating roller, and the protruding structure can coat the insulating adhesive attached to the protruding structure onto the electrode sheet as the transfer roller rotates. Since the protruding structure matches the preset coating area on the electrode sheet, continuous coating of the electrode sheet can be achieved, thereby improving the working efficiency of coating the electrode sheet, which in turn is conducive to improving the efficiency of battery cell production.
[0014] (2) By setting the transfer roller and the coating roller to rotate in the same direction, when the protrusion on the transfer roller comes into contact with the insulating adhesive layer on the coating roller, the protrusion and the insulating adhesive move in opposite directions, which helps to improve the peeling effect of the protrusion on the insulating adhesive on the coating roller, and thus helps to increase the amount of insulating adhesive adhering to the protrusion, thereby ensuring the coating effect on the electrode sheet.
[0015] (3) By setting multiple raised structures, the amount of adhesive applied in a single rotation cycle of the transfer roller can be increased, further improving the continuity of the adhesive application operation. At the same time, by setting patterns on the end face of the raised structure, the adhesion effect of the insulating adhesive on the raised structure can be improved to a certain extent. Furthermore, by setting grooves on the end face of the raised structure, sufficient storage space is provided for the insulating adhesive, which can improve the amount of insulating adhesive adhered to the raised structure.
[0016] (4) By setting the glue collection groove on the coating roller, the glue collection groove matches the protrusion structure on the transfer roller, so that the protrusion structure can be accurately inserted into the glue collection groove to pick up the insulating glue, ensuring the consistency of the amount of insulating glue picked up. In addition, it can reduce the residue and waste of insulating glue in other areas of the coating roller.
[0017] (5) By setting the scraping component, the scraping component can be operated to scrape off the insulating adhesive on the coating roller and adjust its thickness, thereby controlling the amount of insulating adhesive adhering to the coating roller and ensuring that the adhesive layer thickness is uniform. At the same time, the thickness of the insulating adhesive layer can be flexibly adjusted according to the coating requirements of the electrode sheet, thereby changing the amount of insulating adhesive adhering to the raised structure and meeting different coating requirements.
[0018] (6) By setting a scraper roller and a scraper with gradually decreasing width, the distance between the scraper and the coating roller can be changed by adjusting the rotation angle of the scraper roller, thereby realizing the adjustment of the thickness of the insulating adhesive layer on the coating roller. The structure is simple and reliable, and can further improve the accuracy and flexibility of the insulation adhesive thickness adjustment.
[0019] (7) By setting the support roller, the electrode overlaps on the support roller, which can provide stable support and guidance for the electrode, and prevent the electrode from shaking or shifting due to its own weight or movement during the coating process, thus ensuring the accurate relative position of the electrode and the transfer roller.
[0020] (8) By setting the coating unit, a release agent can be applied to the raised structure, thereby weakening the adhesion between the insulating adhesive and the raised structure to a certain extent, making it easier for the insulating adhesive to transfer from the raised structure to the preset area of the electrode when it comes into contact with the electrode, and reducing the adhesive residue on the raised structure.
[0021] Another object of this application is to provide an electrode processing apparatus, including an unwinding device, a winding device, and an adhesive coating device as described above disposed between the unwinding device and the winding device.
[0022] Furthermore, a set of guiding rollers is provided between the unwinding device and the coating device, the set of guiding rollers including multiple rollers for winding the electrode sheet; and / or, A baking device is provided between the coating device and the winding device, and the baking device has a baking channel through which the electrode sheet passes.
[0023] The electrode processing equipment described in this application and / or the adhesive coating device described above have the same technical effects as related technologies, and will not be described in detail here. Attached Figure Description
[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the adhesive application apparatus described in an embodiment of this application; Figure 2 This is a schematic diagram of the coating device structure when the coating roller is provided with a glue collection trough, as described in the embodiments of this application; Figure 3 This is a schematic diagram of the protrusion structure described in the embodiments of this application; Figure 4 This is a schematic diagram of another embodiment of the protrusion structure described in this application; Figure 5 This is a schematic diagram of the overall structure of the electrode processing equipment described in the embodiments of this application; Explanation of reference numerals in the attached figures: 1. Glue application device; 101. Coating roller; 1011. Glue collection tank; 102. Transfer roller; 1021. Raised structure; 1022. Pattern; 1023. Groove; 103. Slurry tank; 1031. Baffle; 104. Scraper roller; 105. Support roller; 106. Coating unit; 1061. Die head; 2. Insulating adhesive; 3. Electrode; 4. Unwinding device; 5. Winding device; 6. Correcting roller assembly; 601. Roller; 7. Baking equipment; 8. Visual inspection device. Detailed Implementation
[0025] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.
[0027] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0028] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.
[0029] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0030] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.
[0031] An embodiment of the first aspect of this application provides an adhesive coating apparatus 1 for coating an insulating adhesive 2 onto an electrode sheet 3.
[0032] In related technologies, a dispensing machine is typically used to apply adhesive to the electrode sheet 3. The dispensing head of the dispensing machine is driven to move along the edge of the electrode sheet 3 to apply the insulating adhesive 2 onto the electrode sheet 3. However, the dispensing head has limited movement speed and dispensing speed. Furthermore, during the adhesive application process, the electrode sheet 3 needs to pause at the dispensing machine's station before being conveyed to the next station. This results in low work efficiency and hinders the improvement of battery production efficiency.
[0033] In view of this, in order to overcome the shortcomings of the related technology, the adhesive applicator 1 in this embodiment combines... Figure 1 As shown, the overall design includes a coating roller 101, a transfer roller 102, and a slurry tank 103.
[0034] The coating roller 101 and the transfer roller 102 are arranged adjacent to each other and can both be driven to rotate. The transfer roller 102 is arranged adjacent to each other and is located on the side of the electrode 3 to be coated with adhesive. The slurry tank 103 contains insulating adhesive 2, and part of the outer peripheral surface of the coating roller 101 is immersed in the insulating adhesive 2 in the slurry tank 103.
[0035] The transfer roller 102 has a raised structure 1021 on its outer periphery. As the transfer roller 102 rotates, the insulating adhesive 2 on the coating roller 101 can be peeled off by the raised structure 1021 and adhered to the raised structure 1021. At the same time, the insulating adhesive 2 attached to the raised structure 1021 can be coated onto the preset area of the electrode 3 as the raised structure 1021 moves.
[0036] Therefore, through the cooperative arrangement of the coating roller 101 and the transfer roller 102, when the transfer roller 102 rotates, the protruding structure 1021 can peel off the insulating adhesive 2 on the coating roller 101. Furthermore, as the transfer roller 102 rotates, the protruding structure 1021 can coat the insulating adhesive 2 attached to it onto the electrode sheet 3. Since the protruding structure 1021 matches the preset coating area on the electrode sheet 3, continuous coating of the electrode sheet 3 can be achieved, thereby improving the working efficiency of coating the electrode sheet 3 and thus contributing to the improvement of cell production efficiency.
[0037] Based on the above general introduction, specifically, there is a certain gap between the protruding structure 1021 on the transfer roller 102 and the coating roller 101, so that the protruding structure 1021 does not directly contact the outer peripheral surface of the coating roller 101, and ensures that the protruding structure 1021 can contact the insulating adhesive 2 on the coating roller 101.
[0038] It is understandable that, since the raised structure 1021 needs to peel off and pick up the insulating adhesive 2 on the coating roller 101, if the raised structure 1021 directly contacts the outer peripheral surface of the coating roller 101, the insulating adhesive 2 will be pressed to the edge of the raised structure 1021, resulting in insufficient insulating adhesive 2 attached to the end face of the raised structure 1021, which will affect the coating effect.
[0039] Therefore, the setting of this gap can not only avoid the protruding structure 1021 from contacting the coating roller 101 and reduce the wear of the protruding structure 1021 and the coating roller 101, but also ensure that there is a sufficient amount of insulating adhesive 2 on the end face of the protruding structure 1021, thereby ensuring the coating effect.
[0040] In addition, there is a certain gap between the protruding structure 1021 and the electrode 3. This gap can prevent the protruding structure 1021 from contacting the electrode 3 and thus prevent damage to the electrode 3. At the same time, it can ensure that the insulating adhesive 2 attached to the protruding structure 1021 can contact the electrode 3 and be coated onto the electrode 3, thereby ensuring the coating effect.
[0041] In addition, since the insulating adhesive 2 needs to be coated on the edge of the electrode 3, therefore, the bonding... Figure 3 , Figure 4As shown, the convex structure 1021 is also configured to fit the "mouth" - shaped or "day" - shaped structure of the preset area of the electrode tab 3. Of course, the convex structure 1021 can also be configured into other shapes, as long as the insulating glue 2 can be coated on the preset area of the electrode tab 3.
[0042] In some exemplary embodiments, the rotation direction of the transfer roller 102 is the same as that of the coating roller 101. It can be understood that if the rotation directions of the transfer roller 102 and the coating roller 101 are opposite, in the area where the insulating glue 2 layer on the coating roller 101 contacts the convex structure 1021, the moving directions of the insulating glue 2 and the convex structure 1021 are the same.
[0043] Therefore, from the contact area, the convex structure 1021 will move along the direction perpendicular to the moving directions of the insulating glue 2 and the convex structure 1021, that is, along the radial direction of the coating roller 101 towards the coating roller 101 to contact the insulating glue 2. Subsequently, the coating roller 101 still moves away from the coating roller 101 along the radial direction, so as to dip the insulating glue 2 from the coating roller 101 to achieve the peeling of the insulating glue 2. However, in this process, the insulating glue 2 in contact with the convex structure 1021 is only affected by the radial force due to the adhesion to the convex structure 1021. At the same time, since the insulating glue 2 in contact with the convex structure 1021 is still in contact with other parts of the insulating glue 2, due to the surface tension of the insulating glue 2, the adhesion of the insulating glue 2 on the coating roller 101 is relatively strong, ultimately resulting in that the insulating glue 2 is not easily attached to the convex structure ①021, thus causing insufficient glue amount on the convex structure 1021.
[0044] By setting the transfer roller 102 and the coating roller 101 to rotate in the same direction, when the convex structure 1021 on the transfer roller 102 contacts the insulating glue 2 layer on the coating roller 101, the moving directions of the convex structure 1021 and the insulating glue 2 are opposite. At this time, the convex structure 1021 moves along the tangential direction of the coating roller 101, and the insulating glue 2 layer can be subjected to the shearing force from the convex structure 1021. Since both the end face of the convex structure 1021 and the insulating glue 2 layer have arc - shaped surfaces, the insulating glue 2 can be smeared on the end face of the convex structure 1021, which is beneficial to improving the peeling effect of the insulating glue 2 on the coating roller 101 by the convex structure 1021, and further beneficial to increasing the adhesion amount of the insulating glue 2 on the convex structure 1021, thus ensuring the glue - coating effect on the electrode tab 3.
[0045] In addition, since the convex structure 1021 peels the insulating glue 2 by moving along the tangential direction of the coating roller 101, taking the coating roller 101 as a reference, the convex structure 1021 can sweep across the outer peripheral surface of the coating roller 101, which is beneficial to reducing the residue of the insulating glue 2 on the outer peripheral surface of the coating roller 101.
[0046] It should be noted that there is a "①" in the original text of item which seems to be an error. I have translated it as "①021" as it is in the original text. If this is incorrect, please provide the correct content for a more accurate translation.In addition, it is worth mentioning that in the area where the protruding structure 1021 contacts the electrode 3, the moving direction of the protruding structure 1021 is consistent with the conveying direction of the electrode 3, so that the insulating adhesive 2 on the protruding structure 1021 can be abutted against the preset area of the electrode 3, rather than being applied to a large area on the electrode 3, thereby effectively ensuring the accuracy of the adhesive application position of the electrode 3.
[0047] In some of the exemplary implementations, combined with Figure 3 , Figure 4 As shown, the raised structures 1021 are multiple structures spaced apart along the circumference of the transfer roller 102. The end face of the raised structure 1021 is provided with a pattern 1022. At the same time, the end face of the raised structure 1021 may also be provided with a groove 1023.
[0048] By setting multiple raised structures 1021, the amount of adhesive applied in a single rotation cycle of the transfer roller 102 can be increased, further improving the continuity of the adhesive application operation. Simultaneously, by setting patterns 1022 on the end faces of the raised structures 1021, the adhesion of the insulating adhesive 2 to the raised structures 1021 can be improved to some extent. Furthermore, by setting grooves 1023 on the end faces of the raised structures 1021, sufficient storage space is provided for the insulating adhesive 2. When the raised structures 1021 come into contact with the insulating adhesive 2, the insulating adhesive 2 can enter the grooves 1023, thereby increasing the amount of insulating adhesive 2 adhered to the raised structures 1021.
[0049] Based on this, in specific implementation, the slurry tank 103 of this embodiment may include an inclined baffle 1031 and side plates disposed at both ends of the baffle 1031. The two side plates are disposed at both ends of the baffle 1031 along the axial direction of the coating roller 101 and abut against both ends of the coating roller 101. At the same time, the lower edge of the baffle 1031 is tangent to the coating roller 101, and a small gap is provided between the baffle 1031 and the coating roller 101. Furthermore, the tangential direction of the lower side surface of the coating roller 101 extends towards the side plates, so that when the coating roller 101 rotates, it can drive the insulating adhesive 2 in the slurry tank 103 to have a tendency to move upward along the outer circumferential surface of the coating roller 101.
[0050] It is understandable that, through the above-described structure of the slurry tank 103, the coating roller 101 forms one side wall of the slurry tank 103. Simultaneously, due to the rotation direction of the coating roller 101 and the adhesiveness of the insulating adhesive 2, the aforementioned gap design ensures that the insulating adhesive 2 will not overflow through the gap, and also ensures that any residual insulating adhesive 2 on the coating roller 101 can re-enter the slurry tank 103 through the gap, avoiding waste. Of course, the slurry tank 103 in this embodiment can also adopt a conventional slurry tank structure well-known to those skilled in the art, as long as the insulating adhesive 2 adheres to the coating roller 101.
[0051] In some of the exemplary implementations, combined with Figure 2 As shown, a glue-collecting groove 1011 corresponding to the protruding structure 1021 is formed in the outer periphery of the coating roller 101. The coating roller 101 and the transfer roller 102 rotate synchronously in opposite directions, so that the transfer roller 102 and the coating roller 101 form an meshing motion state, ensuring that the protruding structure 1021 can be inserted into the glue-collecting groove 1011. As the transfer roller 102 rotates, the protruding structure 1021 can be inserted into the glue-collecting groove 1011, and the protruding structure 1021 picks up the insulating glue 2 in the glue-collecting groove 1011.
[0052] By setting the glue collection groove 1011 on the coating roller 101, the glue collection groove 1011 matches the protrusion structure 1021 on the transfer roller 102, so that the protrusion structure 1021 can be inserted into the glue collection groove 1011 to pick up the insulating glue 2, ensuring the consistency of the amount of insulating glue 2 picked up. In addition, it can reduce the residue and waste of insulating glue 2 in other areas of the coating roller 101.
[0053] It is worth mentioning that since the coating roller 101 is provided with a glue collection groove 1011, the slurry tank 103 can only use a conventional trough structure to prevent the insulating adhesive 2 from leaking out through the glue collection groove 1011. Therefore, in this embodiment, if the coating roller is provided with a glue collection groove, the coating roller and the transfer roller rotate synchronously in opposite directions, and the slurry tank adopts a conventional trough structure. However, in the embodiment without a glue collection groove, the coating roller and the transfer roller can preferably rotate in the same direction, and the slurry tank can adopt the structure described above that uses part of the outer peripheral surface of the coating roller as the sidewall of the slurry tank.
[0054] In some exemplary embodiments, the coating apparatus 1 further includes a scraping component that can be operated to scrape the insulating adhesive 2 on the coating roller 101 to adjust the thickness of the insulating adhesive 2 on the coating roller 101.
[0055] By setting up the scraping component, the scraping component can be operated to scrape off the insulating adhesive 2 on the coating roller 101 and adjust its thickness, thereby controlling the amount of insulating adhesive 2 adhering to the coating roller 101 and ensuring that the adhesive layer thickness is uniform. At the same time, the thickness of the insulating adhesive 2 layer can be flexibly adjusted according to the coating requirements of the electrode sheet 3, thereby changing the amount of insulating adhesive 2 adhering to the raised structure 1021 and meeting different coating requirements.
[0056] Specifically, in some exemplary embodiments, the scraping assembly includes a scraper roller 104 having a scraper blade protruding outward from the coating roller 101, and the width of the scraper blade gradually decreases in the direction close to the coating roller 101, thereby causing the radial dimension of the scraper roller 104 to gradually decrease along its circumference. Furthermore, the rotation angle of the scraper roller 104 can be adjusted.
[0057] By setting a scraper roller 104 and a scraper with a gradually decreasing width, the distance between the scraper and the coating roller 101 can be changed by adjusting the rotation angle of the scraper roller 104, thereby adjusting the thickness of the insulating adhesive layer 2 on the coating roller 101. The structure is simple and reliable, and can further improve the accuracy and flexibility of the insulation adhesive layer 2 thickness adjustment.
[0058] In some exemplary embodiments, the adhesive applicator 1 further includes a rotatably configured support roller 105, with a gap between the support roller 105 and the transfer roller 102 for the electrode 3 to pass through, and the electrode 3 overlapping the support roller 105.
[0059] With the support roller 105 in place, the electrode 3 overlaps on the support roller 105, which can provide stable support and guidance for the electrode 3, and prevent the electrode 3 from shaking or shifting due to its own weight or movement during the coating process, thus ensuring the accurate relative position of the electrode 3 and the transfer roller 102.
[0060] In some exemplary embodiments, the adhesive applicator 1 further includes a coating unit 106 having a die 1061 disposed toward the transfer roller 102, the die 1061 being used to apply a release agent onto the raised structure 1021. It is understood that the release agent enables the adhesive strength between the insulating adhesive 2 and the raised structure 1021 to be less than the adhesive strength between the insulating adhesive 2 and the electrode 3, thereby ensuring the peeling and adhesion effect of the raised structure 1021 on the insulating adhesive 2 while making it easier for the insulating adhesive 2 on the raised structure 1021 to be bonded to the electrode 3.
[0061] Therefore, by setting the coating unit 106, a release agent can be coated on the raised structure 1021, thereby weakening the adhesion between the insulating adhesive 2 and the raised structure 1021 to a certain extent. This makes it easier for the insulating adhesive 2 to transfer from the raised structure 1021 to the preset area of the electrode 3 when it comes into contact with the electrode sheet 3, and reduces the amount of adhesive residue on the raised structure 1021.
[0062] In specific implementation, the insulating adhesive 2 of this embodiment can be a conventional release agent well known to those skilled in the art, and the coating unit 106 of this embodiment is also a conventional mechanism. The die head 1061 of this embodiment extends axially along the transfer roller 102. The die head 1061 can be connected to a conventional extrusion mechanism to extrude the release agent from the die head 1061 and coat it onto the raised structure 1021. Alternatively, the die head 1061 can also be configured as a spraying structure and connected to a spraying mechanism, allowing the release agent to be sprayed onto the raised structure 1021 through the die head 1061.
[0063] In addition, the specific structures of the coating unit 106 and the die body, as well as the drive mechanisms for driving the transfer roller 102, the coating roller 101, the doctor blade roller 104, and the support roller 105 to rotate are all conventional mechanisms well-known to those skilled in the art, so they will not be elaborated here.
[0064] It is worth mentioning that since only the convex structure 1021 contacts the insulating glue layer on the coating roller 101, the application of the release agent to other positions of the transfer roller 102 will not significantly affect the bonding process of the electrode sheet 3. At the same time, the coating unit 106 intermittently applies the release agent to the convex structure 102, so as to avoid excessive use of the release agent.
[0065] It should be noted that for the glue coating device 1 of this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it still consists of Figure 1 As shown, for example, it may include a coating roller 101, a transfer roller 102, and a slurry tank 103.
[0066] Among them, the coating roller 101 and the transfer roller 102 are arranged adjacent to each other and can both be driven to rotate. The transfer roller 102 is arranged adjacent to and on one side of the electrode sheet 3 to be coated with glue. The slurry tank 103 contains the insulating glue 2, and a part of the outer peripheral surface of the coating roller 101 is immersed in the insulating glue 2 in the slurry tank 103.
[0067] Moreover, a convex structure 1021 is provided on the outer periphery of the transfer roller 102. As the transfer roller 102 rotates, the insulating glue 2 on the coating roller 101 can be peeled off by the convex structure 1021 and adhered to the convex structure 1021. At the same time, the insulating glue 2 adhered to the convex structure 1021 can be coated on the preset area of the electrode sheet 3 as the convex structure 1021 moves.
[0068] In addition, there is a certain gap between the convex structure 1021 on the transfer roller 102 and the coating roller 101, so that the convex structure 1021 does not directly contact the outer peripheral surface of the coating roller 101 and ensures that the convex structure 1021 can contact the insulating glue 2 on the coating roller 101. There is also a certain gap between the convex structure 1021 and the electrode sheet 3, which can prevent the convex structure 1021 from contacting the electrode sheet 3 and avoid damage to the electrode sheet 3. At the same time, the convex structure 1021 is also constructed as a "day" - shaped structure that fits the preset area of the electrode sheet 3. Grooves 1023 and patterns 1022 are provided on the end surface of the convex structure 1021, and the convex structures 1021 are arranged at intervals along the circumferential direction of the transfer roller 102.
[0069] Furthermore, the rotation direction of the transfer roller 102 is the same as that of the coating roller 101. The slurry tank 103 may include an inclined baffle 1031 and side plates at both ends of the baffle 1031. The two side plates are respectively disposed at both ends of the baffle 1031 along the axial direction of the coating roller 101 and abut against both ends of the coating roller 101. At the same time, the lower edge of the baffle 1031 is tangent to the coating roller 101, and a narrow gap is provided between the baffle 1031 and the coating roller 101. Moreover, the tangential direction of the lower side of the coating roller 101 extends towards the side plates, so that when the coating roller 101 rotates, it can drive the insulating adhesive 2 in the slurry tank 103 to have a tendency to move upward along the outer peripheral surface of the coating roller 101.
[0070] Furthermore, the coating apparatus 1 also includes a scraping assembly capable of being operated to scrape the insulating adhesive 2 from the coating roller 101, thereby adjusting the thickness of the insulating adhesive 2 on the coating roller 101. The scraping assembly includes a doctor blade roller 104, which has a doctor blade protruding outward from the coating roller 101, and the width of the doctor blade gradually decreases along the direction close to the coating roller 101, thereby causing the radial dimension of the doctor blade roller 104 to gradually decrease along its circumference. Moreover, the rotation angle of the doctor blade roller 104 can be adjusted.
[0071] Meanwhile, the coating device 1 also includes a rotatably mounted support roller 105, with a gap between the support roller 105 and the transfer roller 102 for the electrode 3 to pass through, and the electrode 3 overlapping the support roller 105. The coating device 1 also includes a coating unit 106, which has a die head 1061 facing the transfer roller 102, and the die head 1061 is used to coat the release agent onto the raised structure 1021.
[0072] In the preferred embodiment of the above-mentioned adhesive coating device 1, the specific configuration and arrangement of the transfer roller 102, coating roller 101, slurry tank 103, etc. can still be referred to the descriptions in the above-mentioned exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the transfer roller 102, coating roller 101, and slurry tank 103, etc., can also be referred to the descriptions in the above-mentioned exemplary embodiments.
[0073] The coating device 1 of this embodiment adopts the above design. Through the cooperation of the coating roller 101 and the transfer roller 102, when the transfer roller 102 rotates, the protruding structure 1021 can peel off the insulating adhesive 2 on the coating roller 101. Furthermore, the protruding structure 1021 can coat the insulating adhesive 2 attached to it onto the electrode 3 as the transfer roller 102 rotates. Since the protruding structure 1021 matches the preset coating area on the electrode 3, continuous coating of the electrode 3 can be achieved, thereby improving the working efficiency of coating the electrode 3 and thus improving the efficiency of battery cell production. It has good practicality.
[0074] An embodiment of the second aspect of this application provides an electrode 3 coating device, which, in terms of its overall structure, combines... Figure 5 As shown, the electrode coating equipment includes an unwinding device 4, a winding device 5, and a coating device 1 as described above, which is located between the unwinding device 4 and the winding device 5.
[0075] The electrode 3 coating equipment in this embodiment, through the setting of the above-mentioned coating device 1, can realize continuous coating of electrode 3, thereby improving work efficiency and thus facilitating the improvement of cell production efficiency.
[0076] Specifically, in this embodiment, a correction roller group 6 is provided between the unwinding device 4 and the gluing device 1. The correction roller group 6 includes multiple rollers 601 for winding the electrode sheet 3. By setting the correction roller group 6, the posture of the electrode sheet 3 during transportation is adjusted and the deviation is corrected, so as to prevent the electrode sheet 3 from curling or wrinkling and ensure the effect of gluing.
[0077] Meanwhile, a baking device 7 may be provided between the coating device 1 and the winding device 5. The baking device 7 has a baking channel through which the electrode sheet 3 passes. Specifically, the baking device 7 also has a heating part, which is located on the inner wall of the baking channel and is located at least on the side of the electrode sheet 3 coated with insulating adhesive 2, so as to bake the insulating adhesive 2, quickly cure the insulating adhesive 2, and prevent the electrode sheet 3 from sticking together during the subsequent winding process.
[0078] In specific implementation, the heating part can be an electric heating tube, and a visual inspection device 8 is provided between the baking device 7 and the winding device 5. The visual inspection device 8 can be a CCD camera, which can capture images of the glue-coated area of the electrode 3 to judge the glue coating effect.
[0079] The correction roller group 6, baking device 7 and visual inspection device 8 in this embodiment are all conventional mechanisms well known to those skilled in the art, and therefore will not be described in detail here.
[0080] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the protection scope of the claims of this application.
Claims
1. A glue-applying device, characterized in that: Includes coating rollers and transfer rollers that are driven to rotate and arranged adjacent to each other, as well as a slurry tank; The transfer roller is arranged adjacent to and located on the side of the electrode sheet to be coated with adhesive; The slurry tank contains insulating adhesive, and part of the outer peripheral surface of the coating roller is immersed in the insulating adhesive in the slurry tank; The transfer roller has a raised structure on its outer periphery. As the transfer roller rotates, the insulating adhesive on the coating roller can be peeled off by the raised structure and adhered to the raised structure. The insulating adhesive is also coated on the preset area of the electrode as the raised structure moves.
2. The adhesive applicator according to claim 1, characterized in that: The transfer roller rotates in the same direction as the coating roller.
3. The adhesive applicator according to claim 1, characterized in that: The raised structures are multiple structures spaced apart circumferentially along the transfer roller, and the end faces of the raised structures are provided with patterns and / or grooves.
4. The adhesive applicator according to claim 1, characterized in that: The coating roller has a recessed groove on its outer periphery that corresponds to the protruding structure, and the coating roller and the transfer roller rotate synchronously in opposite directions. As the transfer roller rotates, the protruding structure can be inserted into the adhesive collection tank and pick up the insulating adhesive in the adhesive collection tank.
5. The adhesive applicator according to claim 1, characterized in that: It also includes a scraping assembly that can be operated to scrape the insulating adhesive off the coating roller to adjust the thickness of the insulating adhesive on the coating roller.
6. The adhesive applicator according to claim 5, characterized in that: The scraping assembly includes a scraper roller having scrapers protruding outward from the coating roller, and the width of the scrapers gradually decreases in the direction close to the coating roller, and the rotation angle of the scraper roller can be adjusted.
7. The adhesive applicator according to any one of claims 1 to 6, characterized in that: It also includes a rotatable support roller, with a gap between the support roller and the transfer roller for the electrode to pass through, and the electrode overlapping the support roller.
8. The adhesive applicator according to any one of claims 1 to 6, characterized in that: It also includes a coating unit having a die head disposed toward the transfer roller for applying release agent onto the raised structure.
9. An electrode processing device, characterized in that: It includes an unwinding device, a winding device, and an adhesive applicator as described in any one of claims 1 to 8 disposed between the unwinding device and the winding device.
10. The electrode processing equipment according to claim 9, characterized in that: A set of guiding rollers is provided between the unwinding device and the coating device, the set of guiding rollers including multiple rollers for winding the electrode sheet; and / or, A baking device is provided between the coating device and the winding device, and the baking device has a baking channel through which the electrode sheet passes.