Spraying device and battery production line

Abstract

The application relates to the technical field of battery manufacturing, and provides a spraying device and a battery production line. The spraying device comprises a spraying assembly, the spraying assembly comprises a cover shell and an immersion coating part, the cover shell comprises a bottom wall and a side wall, the side wall is arranged around the periphery of the bottom wall and defines a containing cavity with the bottom wall, and the immersion coating part is arranged around the bottom wall; the cover shell is used for covering the to-be-sprayed part and enabling the immersion coating part to be in contact with the to-be-sprayed surface of the to-be-sprayed part; the cover shell is provided with a first conveying channel which is in communication with the containing cavity and is used for conveying spraying slurry; and the immersion coating part is configured to be capable of absorbing and storing the spraying slurry and is used for coating the spraying slurry on the to-be-sprayed surface. Through the technical scheme, the production cost can be reduced, and the uniformity of the spraying slurry sprayed on the to-be-sprayed part can be improved.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, specifically to a spraying device and a battery production line. Background Technology

[0002] Currently, with the rapid development of the new energy industry, batteries are widely used in new energy vehicles, energy storage equipment, and many other fields. In actual battery use, for example, the end faces and side edges of cylindrical battery cells are critical areas subject to stress and wear. Excessive wear can lead to damage to the battery casing, electrolyte leakage, and even safety hazards such as short circuits and fires.

[0003] To address these issues, the industry commonly employs the method of spraying UV-curable adhesive onto the end faces and side edges of cylindrical battery cells to enhance edge abrasion resistance and fill minor imperfections on the end faces and edges. However, traditional UV-curable adhesive spraying equipment has a complex structure, high production and maintenance costs, poor spray uniformity, and unstable protective effects. Utility Model Content

[0004] The purpose of this application is to provide a spraying device and a battery production line, which simplifies the structure of the spraying device, reduces costs, and improves spraying uniformity. This objective is achieved through the following technical solutions:

[0005] In a first aspect, this application provides a spraying apparatus, comprising: a spraying component including a housing and a dip-coating element, the housing including a bottom wall and a side wall, the side wall surrounding the periphery of the bottom wall and defining a receiving cavity between the side wall and the bottom wall, the dip-coating element being arranged around the bottom wall, the housing being used to cover the workpiece to be sprayed and to make the dip-coating element contact the surface to be sprayed of the workpiece; wherein, the housing is provided with a first conveying channel communicating with the receiving cavity, the first conveying channel being used to convey spraying slurry, the dip-coating element being configured to absorb and store the spraying slurry and to coat the spraying slurry onto the surface to be sprayed.

[0006] According to the spraying apparatus provided in this application, by circling the dip-coating element around the bottom wall of the housing and opening a first conveying channel on the housing for conveying the spraying slurry, the spraying slurry is first conveyed to the dip-coating element in the receiving cavity through the first conveying channel before the spraying operation, and is absorbed and stored by the dip-coating element. During the spraying operation, taking a cylindrical battery cell as an example, one end face of the cylindrical battery cell can be pre-positioned facing the dip-coating element, and then the housing is driven to cover the cylindrical battery cell, so that one end face of the cylindrical battery cell contacts the dip-coating element. When one end face of the cylindrical battery cell contacts the dip-coating element, the spraying slurry can be evenly transferred to one end face of the cylindrical battery cell through the dipping action of the dip-coating element. This can improve the problem of spraying blind spots or local accumulation of spraying slurry caused by improper control of flow rate or spraying direction in traditional spraying methods, significantly improve the spraying uniformity, help ensure the consistency of the protective layer performance, and thus enhance the safety protection effect during battery use. Moreover, the product has a simple structure, which not only reduces the production and manufacturing costs of the equipment, but also facilitates later maintenance.

[0007] In addition, the spraying apparatus provided in this application may also have the following additional technical features:

[0008] In some embodiments of this application, the inner surface of the receiving cavity is provided with a flow groove, which is connected to the first conveying channel, and at least part of the dip-coated part is disposed in the flow groove.

[0009] By providing a flow channel connected to the first conveying channel on the inner surface of the receiving cavity, and with at least a portion of the dip-coated part disposed within the flow channel, the flow channel can guide the sprayed slurry to flow within the receiving cavity, reducing uneven adhesive absorption of the dip-coated part caused by localized accumulation of the sprayed slurry. Furthermore, the flow channel can form a buffer space for the sprayed slurry, enabling the dip-coated part to continuously and stably absorb the sprayed slurry, and ensuring a relatively uniform coating amount during contact, thus contributing to improved coating uniformity.

[0010] In some embodiments of this application, the flow groove ring is disposed on the inner surface of the side wall, or the flow groove ring is disposed on the side of the bottom wall facing the dip-coated part.

[0011] The flow channel is located on the inner surface of the side wall or on the bottom wall facing the dip-coated part. Both the flow channel located on the inner surface of the side wall or the flow channel located on the bottom wall can supply the spraying slurry to the dip-coated part and make it easy for the dip-coated part to fully absorb the adhesive in the area to be sprayed corresponding to the part to be sprayed, so as to improve the accuracy and uniformity of spraying.

[0012] In some embodiments of this application, the dip-coated part includes a first dip-coating body and a second dip-coating body. The first dip-coating body is arranged around the bottom wall, and the second dip-coating body is arranged around the outer periphery of the first dip-coating body and in contact with the inner surface of the side wall. The second dip-coating body protrudes from the side of the first dip-coating body away from the bottom wall.

[0013] Taking a cylindrical battery cell as an example, the dip-coating process employs a first dip coating and a second dip coating surrounding its outer periphery. When the second dip coating protrudes from the side of the first dip coating away from the bottom wall, it can adapt to the arc-shaped transition area between the end face and the side edge of the cylindrical battery cell. The first dip coating focuses on coating the end face of the cylindrical battery cell, while the second dip coating conforms to the arc-shaped area of ​​the side edge, achieving integrated coating of the end face and side edge. This reduces the uneven coating problem at the interface that may occur due to separate coating in traditional equipment. Simultaneously, the second dip coating protruding from the first dip coating enhances the contact effect with the side edge of the part to be coated, improves the integrity of the protective layer, and further enhances the battery's wear resistance.

[0014] In some embodiments of this application, the dip-coated part includes a sponge.

[0015] The coating material is a sponge. The sponge's porous structure allows it to quickly absorb and store sufficient coating material. Its excellent elasticity allows it to conform to the surface contours of the part being coated through deformation, making it particularly suitable for the complex shapes of the end faces and side edges of cylindrical battery cells, reducing coating dead zones. Furthermore, the sponge's soft material prevents scratches and damage to the battery casing, helping to maintain its integrity. The sponge is also inexpensive and easy to replace, reducing equipment maintenance costs.

[0016] In some embodiments of this application, the sponge has a plurality of evenly distributed pores, and the pore diameter of the plurality of pores gradually increases along the arrangement direction from the dip-coated part to the bottom wall.

[0017] By designing the multiple pores of the sponge to gradually increase in diameter along the arrangement direction from the dip-coated part to the bottom wall, the area near the bottom wall can serve as a storage area, while the side away from the bottom wall can serve as a contact area. This not only guides the sprayed slurry to form an orderly penetration path within the sponge, allowing the sprayed slurry to be smoothly transferred from the storage area to the contact area, reducing material transfer problems or local accumulation that may occur due to uniform pore diameters, but also ensures that the area in contact between the dip-coated part and the part to be sprayed always maintains a relatively uniform adhesive content, thereby further improving the uniformity and stability of the coating.

[0018] In some embodiments of this application, the spraying device further includes a guide sleeve, which includes a main body and a guide portion connected to the main body. The main body is sleeved on the outside of the cover, and the guide portion is used to guide the connection of the part to be sprayed. The main body is provided with a second conveying channel connected to the first conveying channel, and the diameter of the guide portion gradually increases along the arrangement direction from the main body to the guide portion.

[0019] The main body of the guide sleeve is used to install and fix the cover. The guide section, with its gradually increasing diameter, forms a flared guide channel, allowing the workpiece to be coated to smoothly enter from the larger diameter end of the guide section. The gradual change in the guide section guides the workpiece closer and closer to the dip-coated part inside the cover, reducing the difficulty of inserting the workpiece, improving feeding efficiency, adapting to continuous production needs, and effectively reducing the probability of the workpiece shifting, becoming eccentric, or colliding during the docking process. This ensures that the contact position between the workpiece and the dip-coated part remains consistent, thus contributing to improved coating uniformity. Simultaneously, the fitting of the main body and the cover makes the connection between the guide sleeve and the overall structure of the device more stable, resulting in more consistent guiding accuracy. Furthermore, the guide sleeve also provides some protection for the dip-coated part and the receiving cavity, reducing the possibility of external impurities entering and ensuring the cleanliness of the sprayed slurry.

[0020] In some embodiments of this application, the inner wall surface of the guide portion is provided with a flexible layer.

[0021] By setting a flexible layer on the inner wall of the guide sleeve, the flexible layer can buffer the contact force between the part to be sprayed and the inner wall of the guide sleeve, reducing the risk of damage to the part to be sprayed due to collision or friction during the transportation process. At the same time, the flexible layer has a certain anti-slip property, which can reduce the sliding of the part to be sprayed during the transportation process and improve the stability of the transportation process.

[0022] In some embodiments of this application, the spraying apparatus further includes a blow-off assembly connected to a receiving cavity for introducing gas into the receiving cavity.

[0023] By incorporating a blow-off assembly connected to the receiving cavity, gas is introduced between the inner wall of the receiving cavity and the workpiece to be coated, thereby facilitating the detachment of the workpiece. Specifically, after coating, the gas forms an airflow within the receiving cavity to increase the pressure inside, thus allowing the workpiece to detach smoothly from the coated part and reducing the problem of the workpiece getting stuck due to excessive adhesion.

[0024] In some embodiments of this application, the blow-off assembly includes an air pump and a pipeline connected to the air pump, and the housing has a through hole through which the pipeline passes.

[0025] The blow-off assembly adopts a combination structure of air pump and pipeline, with the pipeline passing through the through hole of the cover. This allows the gas provided by the air pump to be accurately delivered through the pipeline to the inner wall of the receiving cavity and between the part to be sprayed, forming a directional airflow. This facilitates the removal of the part from the cover. The structure and principle are relatively simple and easy to implement.

[0026] In some embodiments of this application, the spraying apparatus further includes a drive assembly, which includes a drive member and a transmission member connected to the drive member. The transmission member is connected to a guide sleeve and is used to drive the guide sleeve to move toward or away from the workpiece to be sprayed.

[0027] The drive assembly can drive the guide sleeve to move through the cooperation of the drive component and the transmission component. That is, the drive component can drive the transmission component to move the guide sleeve to move closer to or away from the part to be sprayed, thereby adjusting the contact pressure and contact time between the part to be sprayed and the part to be dipped, thereby improving the reliability of the spraying slurry, improving the automation level of the product, and increasing production efficiency.

[0028] In a second aspect, this application provides a battery production line, including a spraying apparatus according to any one of the embodiments of the first aspect, the spraying apparatus being used to coat the end face and / or side face of a battery cell with a spraying slurry.

[0029] The battery production line provided in this application includes the spraying device of any of the first aspect embodiments, and therefore has the technical effects of any of the above embodiments, which will not be repeated here.

[0030] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0031] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0032] Figure 1 This is a schematic diagram of the structure of a spraying assembly provided in some embodiments of this application;

[0033] Figure 2 This is an exploded structural diagram of a spraying apparatus provided in some embodiments of this application.

[0034] The attached figures are labeled as follows:

[0035] 100. Spraying equipment; 200. Parts to be sprayed;

[0036] 10. Spraying assembly; 20. Guide sleeve; 30. Blow-off assembly; 40. Drive assembly;

[0037] 11. Cover; 111. Receiving cavity; 112. First conveying channel; 12. Dip-coated part; 121. First dip-coated body; 122. Second dip-coated body;

[0038] 21. Main body; 211. Second conveying channel; 22. Guide section;

[0039] 31. Air pump; 32. Piping; 33. Control valve;

[0040] 41. Driving components; 42. Transmission components. Detailed Implementation

[0041] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0043] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0044] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0045] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0046] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0047] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to 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 the embodiments of this application.

[0048] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0049] Currently, with the rapid development of the new energy industry, cylindrical battery cells are widely used in various fields such as consumer electronics, new energy vehicles, and energy storage equipment due to their advantages such as high energy density, compact structure, and long cycle life. For example, in the actual use of cylindrical battery cells, their end faces and side edges are key areas subject to stress and wear. On the one hand, when battery cells are assembled into battery packs or modules, the end faces and side edges are prone to friction and collision with the casing or adjacent battery cells. On the other hand, long-term charge-discharge cycles and environmental vibrations will exacerbate the wear of the end faces and edges. Excessive wear may lead to damage to the battery casing, electrolyte leakage, or even short circuits, fires, and other safety hazards, seriously affecting the safety and reliability of battery use.

[0050] To address these issues, the industry commonly employs a method of spraying UV-curable adhesive onto the end faces and side edges of cylindrical battery cells. The protective layer formed by the UV-cured adhesive enhances edge abrasion resistance, isolates external moisture and impurities, and fills in minor imperfections on the end faces and edges, further improving the battery's structural integrity and safety protection capabilities. However, traditional UV-curable adhesive spraying equipment is complex in structure, has high production and maintenance costs, poor spray uniformity, and unstable protective effects.

[0051] To address the problems of complex structure, high production and maintenance costs, poor coating uniformity, and unstable protective effect of traditional UV-curable adhesive spraying equipment, this application provides a spraying apparatus and a battery production line including the spraying apparatus. The spraying apparatus provided by this application simplifies product structure, reduces production and maintenance costs, and helps improve the uniformity of UV-curable adhesive coating on the parts to be sprayed (e.g., cylindrical battery cells).

[0052] The spraying apparatus disclosed in this application includes, but is not limited to, spraying protective materials such as ultraviolet-cured adhesive onto the end faces and sides of cylindrical or prismatic battery cells, and can also be used to spray anti-corrosion materials onto the weld seams of cylindrical or prismatic battery cells.

[0053] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a spraying assembly provided in some embodiments of this application. Embodiments of this application provide a spraying device 100, including a spraying assembly 10. The spraying assembly 10 includes a housing 11 and a dip-coating element 12. The housing 11 includes a bottom wall and side walls. The side walls surround the periphery of the bottom wall and define a receiving cavity 111 between the side walls and the bottom wall. The dip-coating element 12 is arranged around the bottom wall of the housing 11. The housing 11 is used to cover the workpiece 200 to be sprayed and to make the dip-coating element 12 contact the surface of the workpiece 200 to be sprayed. The housing 11 has a first conveying channel 112 communicating with the receiving cavity 111. The first conveying channel 112 is used to convey spraying slurry. The dip-coating element 12 is configured to absorb and store the spraying slurry and is used to coat the spraying slurry onto the surface of the workpiece 200 to be sprayed.

[0054] As an example, the part to be coated 200 is a cylindrical battery cell, and the dip-coating part 12 is used to coat the end face of the cylindrical battery cell and the side edge connected to the end face with a protective material such as ultraviolet-curable adhesive. The end face is located at one end of the cylindrical battery cell along its length.

[0055] Of course, the part to be painted 200 can also be a square battery cell.

[0056] As an example, when the part to be coated 200 is a cylindrical battery cell, the cross-sectional shape of the cover 11 is circular, and the inner diameter of the cover 11 is adapted to the outer diameter of the cylindrical battery cell, such as being slightly larger than the outer diameter of the cylindrical battery cell. When the part to be coated 200 is a prismatic battery cell, the cross-sectional shape of the cover 11 is rectangular.

[0057] As an example, when the part to be coated 200 is a cylindrical battery cell, the dip-coated part 12 is arranged in a ring.

[0058] As an example, the dip-coating element 12 can be a sponge, fiber felt, felt, etc. The dip-coating element 12 is flexible and can be compressed when it comes into contact with the workpiece 200 to release the stored spraying slurry, thereby allowing the spraying slurry to be coated on the workpiece 200. When the dip-coating element 12 is separated from the workpiece 200, it can return to its initial state.

[0059] As an example, the dip-coated part 12 is disposed on the inner bottom wall of the receiving cavity 111.

[0060] As an example, the first conveying channel 112 is a channel that passes through the housing 11 and is used to connect with a feeding device via a conveying pipe. The feeding device is used to provide the spraying slurry. The first conveying channel 112 can be located at the bottom or side of the housing 11.

[0061] In some embodiments, the inner surface of the housing 11 is coated with lubricating oil or impregnated with polyacrylic resin.

[0062] In some embodiments, a driving device connected to the housing 11 may be provided. The driving device drives the housing 11 to move closer to or further away from the workpiece 200 to be sprayed, so that the dip coating 12 can contact the surface of the workpiece 200 to be sprayed to generate a compressive force. Alternatively, after the dip coating 12 contacts the surface of the workpiece 200 to be sprayed, the driving device may further drive the housing 11 and the dip coating 12 to rotate relative to the workpiece 200 to be sprayed, thereby coating the spray slurry onto the surface of the workpiece 200 to be sprayed.

[0063] According to the spraying apparatus 100 provided in this application, by circling the bottom wall of the housing 11 with the dip-coating element 12 and opening a first conveying channel 112 for conveying the spraying slurry on the housing 11, before the spraying operation, the spraying slurry is first conveyed to the dip-coating element 12 in the receiving cavity 111 through the first conveying channel 112 and absorbed and stored by the dip-coating element 12. During the spraying operation, taking a cylindrical battery as an example, the cylindrical battery can be pre-positioned so that one end face faces the coating element 12. Then, the drive cover 11 is placed over the cylindrical battery, and one end face of the cylindrical battery contacts the coating element 12. When the cylindrical battery cell contacts the coating element 12, the entire surrounding coating element 12 absorbs and stores the spraying slurry. The spraying slurry can be evenly transferred to one end face of the cylindrical battery cell through the dipping action of the coating element 12. This improves the problem of blind spots or local accumulation of spraying slurry caused by improper control of flow rate or spraying direction in traditional spraying methods, significantly improving the uniformity of spraying, helping to ensure the consistency of the protective layer performance, and thus enhancing the safety protection effect during battery use. Moreover, the product structure is simple, which not only reduces the production and manufacturing cost of the equipment, but also facilitates later maintenance.

[0064] According to some embodiments of this application, the inner surface of the receiving cavity 111 is provided with a flow groove (not shown in the figure), the flow groove is connected to the first conveying channel 112, and at least a portion of the dip-coated part 12 is disposed in the flow groove.

[0065] As an example, the flow channel is formed by milling a portion of the structure on the inner surface of the receiving cavity 111.

[0066] By providing a flow channel communicating with the first conveying channel 112 on the inner surface of the receiving cavity 111, and with at least a portion of the dip-coated part 12 disposed within the flow channel, the flow channel can guide the sprayed slurry to flow within the receiving cavity 111, reducing the uneven adhesive absorption of the dip-coated part 12 caused by localized accumulation of the sprayed slurry. Furthermore, the flow channel can form a buffer space for the sprayed slurry, enabling the dip-coated part 12 to continuously and stably absorb the sprayed slurry, and ensuring that the part to be coated 200 obtains a relatively uniform coating amount during contact, thus contributing to improved coating uniformity.

[0067] Please see Figure 1 According to some embodiments of this application, the flow groove ring is disposed on the inner surface of the side wall, or the flow groove ring is disposed on the side of the bottom wall facing the dip-coated part 12.

[0068] In this embodiment, taking the part to be coated 200 as a cylindrical battery cell as an example, the bottom wall is circular, and the side walls are arranged around the outer periphery of the bottom wall. The part to be coated 12 is arranged around the bottom wall and contacts the inner wall surface of the side wall.

[0069] The flow groove is ring-shaped on the inner surface of the side wall or the bottom wall facing the dip-coated part 12. The flow groove ring-shaped on the inner surface of the side wall or the flow groove ring-shaped on the bottom wall can realize the supply of spraying slurry to the dip-coated part 12 and make it easy for the dip-coated part 12 to fully absorb the glue in the area to be sprayed on the part to be sprayed 200, so as to improve the accuracy and uniformity of spraying.

[0070] Please see Figure 1 According to some embodiments of this application, the dip-coated part 12 includes a first dip-coated body 121 and a second dip-coated body 122 surrounding the outer periphery of the first dip-coated body 121, the second dip-coated body 122 protruding from the side of the first dip-coated body away from the bottom wall.

[0071] In this embodiment, taking a cylindrical battery cell as an example, the first coating body 121 and the second coating body 122 are both annular. The second coating body 122 is arranged in contact with the side wall of the cover 11.

[0072] The dip-coated part 12 employs a first dip-coating body and a second dip-coating body surrounding its outer periphery. When the second dip-coating body protrudes from the side of the first dip-coating body away from the bottom wall, it can adapt to the arc-shaped transition area between the end face and side edge of the cylindrical battery cell. The first dip-coating body focuses on coating the end face of the cylindrical battery cell, while the second dip-coating body conforms to the arc-shaped area of ​​the side edge, achieving integrated coating of the end face and side edge. This reduces the uneven coating problem at the interface that may occur due to separate coating in traditional equipment. Simultaneously, the second dip-coating body protruding from the first dip-coating body enhances the contact effect with the side edge of the part to be coated 200, improves the integrity of the protective layer, and further enhances the battery's wear resistance.

[0073] According to some embodiments of this application, the dip-coated part 12 includes a sponge.

[0074] The coating component 12 is a sponge. The sponge itself has a porous structure, enabling it to quickly absorb and store sufficient amounts of coating slurry. Furthermore, the sponge has good elasticity, allowing it to conform to the surface contour of the component 200 upon contact with it, making it particularly suitable for the complex shapes of the end faces and side edges of cylindrical battery cells, reducing coating dead zones. In addition, the sponge's soft material will not cause scratches or damage to the casing of the component 200, helping to ensure the integrity of the battery casing. Simultaneously, the sponge is inexpensive and easy to replace, helping to reduce equipment maintenance costs.

[0075] According to some embodiments of this application, the sponge has a plurality of evenly distributed pores, and the pore diameter of the plurality of pores gradually increases along the arrangement direction from the dip-coated part 12 to the bottom wall.

[0076] In this embodiment, the multiple pores of the sponge are arranged in a gradient that gradually increases along the arrangement direction from the dip-coated part 12 to the bottom wall.

[0077] By designing the multiple pores of the sponge to gradually increase in diameter along the arrangement direction from the dip-coated part 12 to the bottom wall, the area near the bottom wall can serve as a storage area, and the side away from the bottom wall can serve as a contact area. This not only guides the sprayed slurry to form an orderly penetration path within the sponge, allowing the sprayed slurry to be smoothly transferred from the storage area to the contact area, reducing the possibility of poor material transfer or local accumulation due to uniform pore diameters, but also ensures that the area in contact between the dip-coated part 12 and the part to be sprayed 200 always maintains a relatively uniform adhesive content, thereby further improving the uniformity and stability of the coating.

[0078] Please see Figure 2 , Figure 2This is an exploded structural diagram of a spraying apparatus provided in some embodiments of this application. According to some embodiments of this application, the spraying apparatus 100 further includes a guide sleeve 20, which includes a main body 21 and a guide portion 22 connected to the main body 21. The main body 21 is sleeved on the outside of the cover 11, and the guide portion 22 is used to guide and connect the workpiece 200 to be sprayed. The main body 21 is provided with a second conveying channel 211 that communicates with the first conveying channel 112. Along the arrangement direction from the main body 21 to the guide portion 22, the diameter of the guide portion 22 gradually increases.

[0079] In this embodiment, the main body 21 has a mounting cavity. As an example, the cover 11 is installed in the mounting cavity and is interference-fitted with the main body 21.

[0080] In this embodiment, the guide portion 22 is a hollow structure, and a guide channel is formed inside it.

[0081] In this embodiment, the second conveying channel 211 is positioned corresponding to and connected to the first conveying channel 112, and the spraying slurry can be conveyed to the first conveying channel 112 through the second conveying channel 211.

[0082] The main body 21 of the guide sleeve 20 is used to install and fix the cover 11. The guide part 22, with its gradually increasing diameter, forms a flared guide channel, allowing the part to be coated 200 to smoothly enter from the larger diameter end of the guide part 22. The gradual change in the diameter of the guide part 22 guides the part to be coated 200 to gradually approach the dip-coated part 12 inside the cover 11, reducing the difficulty of inserting the part to be coated 200, improving feeding efficiency, adapting to continuous production needs, and effectively reducing the probability of the part to be coated 200 shifting, becoming eccentric, or colliding during the docking process. This ensures that the contact position between the part to be coated 200 and the dip-coated part 12 remains consistent, thus helping to improve the uniformity of the coating amount. Simultaneously, the fitting of the main body 21 and the cover 11 makes the connection between the guide sleeve 20 and the overall structure of the device more stable, and the guiding accuracy more stable. Furthermore, the guide sleeve 20 also provides a certain degree of protection for the dip-coated part 12 and the receiving cavity 111, reducing the possibility of external impurities entering and ensuring the cleanliness of the sprayed slurry.

[0083] According to some embodiments of this application, the inner wall surface of the guide sleeve 20 is provided with a flexible layer (not shown in the figure).

[0084] As an example, the flexible layer can be an elastic silicone pad or a rubber pad.

[0085] As an example, the thickness of the flexible layer is equal to or slightly greater than the thickness of the housing 11.

[0086] By providing a flexible layer on the inner wall of the guide sleeve 20, the flexible layer can buffer the contact force between the part to be sprayed 200 and the inner wall of the guide sleeve 20, reducing the risk of damage to the part to be sprayed 200 due to collision or friction during transportation. At the same time, the flexible layer has a certain anti-slip property, which can reduce the sliding of the part to be sprayed 200 during transportation and improve the stability of the transportation process.

[0087] Please see Figure 2 According to some embodiments of this application, the spraying apparatus 100 further includes a blow-off assembly 30, which is connected to the receiving cavity 111 and is used to introduce gas into the receiving cavity 111.

[0088] As an example, the blowout assembly 30 may include a gas supply unit and a conduit 32 connected to the gas supply unit, the conduit 32 being connected to the receiving cavity 111. The supply unit may be a compressed air source, an elastic air bladder, an air pump 31, etc.

[0089] By providing a blow-off assembly 30 connected to the receiving cavity 111, the blow-off assembly 30 is used to introduce gas between the inner wall of the receiving cavity 111 and the workpiece 200 to be coated, thereby facilitating the detachment of the workpiece 200. Specifically, after coating is completed, the gas forms an airflow in the receiving cavity 111 to increase the pressure inside the receiving cavity 111, thereby facilitating the smooth detachment of the workpiece 200 from the dip-coated workpiece 12 and reducing the problem of the workpiece 200 getting stuck due to excessive adhesion.

[0090] Please see Figure 2 According to some embodiments of this application, the blow-off assembly 30 includes an air pump 31 and a pipe 32 connected to the air pump 31. The housing 11 has a through hole, and the pipe 32 passes through the through hole.

[0091] In some embodiments, a control valve 33 is provided on the pipeline 32, for example, the control valve 33 is a flow regulating valve or a shut-off valve.

[0092] The blow-off assembly 30 adopts a combination structure of air pump 31 and pipeline 32, and the pipeline 32 passes through the through hole of the cover 11, so that the gas provided by air pump 31 can be accurately delivered through pipeline 32 to the inner wall of the receiving cavity 111 and the part to be sprayed 200, and form a directional airflow, thereby facilitating the part to be sprayed 200 to detach from the cover 11. The structure and principle are relatively simple and easy to implement.

[0093] According to some embodiments of this application, the spraying device 100 further includes a drive assembly 40, which includes a drive member 41 and a transmission member 42 connected to the drive member 41. The transmission member 42 is connected to the guide sleeve 20 and is used to drive the guide sleeve 20 to move toward or away from the workpiece 200 to be sprayed.

[0094] In some embodiments, the drive member 41 includes a motor. The transmission member 42 may include a transmission rod, one end of which is connected to the drive member 41 and the other end of which is connected to the outside of the guide sleeve 20. The transmission rod is configured to extend or retract under the driving action of the drive member.

[0095] In some embodiments, the transmission element may also be a telescopic rod that can extend or retract on its own.

[0096] As an example, the transmission rod and the guide sleeve 20 are detachably connected. For instance, one of the transmission rod and the guide sleeve 20 is provided with a groove, and the other is provided with a protrusion that engages with the groove.

[0097] In some embodiments, the transmission rod is also slidably connected to the guide sleeve. For example, one of the transmission member 42 and the guide sleeve is provided with a slide rail, and the other is provided with a slide groove, with the slide rail and the slide groove being slidably connected.

[0098] The drive assembly 40 can drive the guide sleeve 20 to move through the cooperation of the drive component 41 and the transmission component 42. That is, the drive component 41 can drive the transmission component 42 to move so that the guide sleeve 20 moves closer to or further away from the part to be sprayed 200. This can adjust the contact pressure and contact time between the part to be sprayed 200 and the dip-coated part 12, thereby improving the reliability of the spray slurry spraying, improving the automation level of the product, and increasing production efficiency.

[0099] According to some embodiments of this application, see Figure 1 and Figure 2 This application provides a spraying apparatus 100, including a spraying assembly 10 and a guide sleeve 20. The spraying assembly 10 includes a housing 11 and a dip-coating element 12. The housing 11 includes a bottom wall and side walls. The side walls surround the periphery of the bottom wall and define a receiving cavity 111 between the side walls and the bottom wall. The dip-coating element 12 is arranged around the bottom wall. The housing 11 is used to cover the workpiece 200 to be sprayed, so that the workpiece 200 contacts the dip-coating element 12. The housing 11 has a first conveying channel 112 communicating with the receiving cavity 111. The first conveying channel 112 is used to convey spraying slurry. The dip-coating element 12 is configured to absorb and store the spraying slurry and is used to coat the workpiece 200 with the spraying slurry. The guide sleeve 20 includes a main body 21 and a guide portion 22 connected to the main body 21. The main body 21 is fitted onto the cover 11, and the guide portion 22 is used to guide the connection of the part to be sprayed 200. The diameter of the guide portion 22 gradually increases along the arrangement direction from the main body 21 to the guide portion 22. This technical solution simplifies the structure of traditional spraying equipment, reduces product manufacturing costs, and helps improve the uniformity of the spray slurry coating on the part to be sprayed 200.

[0100] According to some embodiments of this application, this application also provides a battery production line, including a spraying device 100 according to any of the above embodiments, the spraying device 100 being used to coat the end face and / or side face of a battery cell with a spraying slurry.

[0101] In some embodiments, the battery production line further includes a material conveying mechanism for conveying battery cells.

[0102] The battery production line provided in this application includes the spraying device 100 of any of the above embodiments, and therefore has the technical effects of any of the above embodiments, which will not be repeated here.

[0103] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A spraying device, characterized in that, include: A spraying assembly includes a housing and a dip-coating element. The housing includes a bottom wall and a side wall. The side wall surrounds the periphery of the bottom wall and defines a receiving cavity between the side wall and the bottom wall. The dip-coating element is arranged around the bottom wall. The housing is used to cover the workpiece to be sprayed and to make the dip-coating element contact the surface of the workpiece to be sprayed. The cover is provided with a first conveying channel communicating with the receiving cavity. The first conveying channel is used to convey the spraying slurry. The dip-coating component is configured to absorb and store the spraying slurry and to apply the spraying slurry to the surface to be sprayed.

2. The spraying apparatus according to claim 1, characterized in that, The inner surface of the receiving cavity is provided with a flow groove, which is connected to the first conveying channel, and at least a portion of the dip-coated part is disposed in the flow groove.

3. The spraying apparatus according to claim 2, characterized in that, The flow groove is annularly disposed on the inner surface of the side wall, or the flow groove is annularly disposed on the side of the bottom wall facing the dip-coated part.

4. The spraying apparatus according to claim 3, characterized in that, The dip-coated part includes a first dip-coating body and a second dip-coating body. The first dip-coating body is arranged around the bottom wall, and the second dip-coating body is arranged around the outer periphery of the first dip-coating body and in contact with the inner surface of the side wall. The second dip-coating body protrudes from the side of the first dip-coating body away from the bottom wall.

5. The spraying apparatus according to claim 3 or 4, characterized in that, The dip-coated part includes a sponge.

6. The spraying apparatus according to claim 5, characterized in that, The sponge has a plurality of evenly distributed pores, and the pore diameter of the plurality of pores gradually increases along the arrangement direction from the dip-coated part to the bottom wall.

7. The spraying apparatus according to any one of claims 1-3, characterized in that, The spraying device further includes a guide sleeve, which includes a main body and a guide part connected to the main body. The main body is sleeved on the outside of the cover, and the guide part is used to guide and connect the part to be sprayed. The main body is provided with a second conveying channel that is connected to the first conveying channel, and the diameter of the guide gradually increases along the arrangement direction from the main body to the guide.

8. The spraying apparatus according to claim 7, characterized in that, The inner wall of the guide sleeve is provided with a flexible layer.

9. The spraying apparatus according to any one of claims 1-3, characterized in that, The spraying device also includes a blow-off assembly, which is connected to the receiving cavity and is used to introduce gas into the receiving cavity.

10. The spraying apparatus according to claim 9, characterized in that, The blow-off assembly includes an air pump and a pipeline connected to the air pump. The housing has a through hole, and the pipeline passes through the through hole.

11. The spraying apparatus according to claim 7, characterized in that, The spraying device further includes a drive assembly, which includes a drive component and a transmission component connected to the drive component. The transmission component is connected to the guide sleeve and is used to drive the guide sleeve to move toward or away from the workpiece to be sprayed.

12. A battery production line, characterized in that, The device includes a spraying apparatus according to any one of claims 1-11, the spraying apparatus being used to coat the spraying slurry onto the end face and / or side face of a battery cell.

Images