Coating device and battery production system

Abstract

The embodiment of the utility model provides a coating device and a battery production system, and relates to the technical field of batteries. The coating device comprises a coating head and a filtering assembly, the filtering assembly comprises a filtering pipeline, an output unit, a recycling unit and a filtering piece, the filtering piece comprises a replacing part, a filtering part and a recycling part which are sequentially connected, the replacing part is connected to the output unit, and the filtering part is located in the filtering pipeline and used for filtering slurry in the filtering pipeline; the recycling part is connected to the recycling unit, the output unit is used for conveying the replacing part to the filtering pipeline, and the recycling unit is used for recycling the filtering part. When the filter part is replaced, only the replacement part needs to be conveyed to the filter pipeline through the output unit to replace the original filter part, and meanwhile, the replaced filter part is recycled by the recycling part, so that the replacement of the filter part can be realized, and the replacement efficiency can be improved to a certain extent.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a coating apparatus and a battery production system. Background Technology

[0002] In the electrode coating process of a battery device, slurry needs to be supplied to the coating head, and the slurry is filtered through filter screens and other filter elements during the slurry supply process.

[0003] After filtration, some particles remain inside the filter, affecting its filtration effect. Therefore, the filter needs to be replaced regularly. The replacement process is cumbersome, which reduces production efficiency. Therefore, how to improve the replacement efficiency of the filter is a research direction in battery technology. Utility Model Content

[0004] This application provides a coating apparatus and a battery production system that can improve filter replacement efficiency and reduce the possibility of slurry waste and foreign matter contamination.

[0005] In a first aspect, embodiments of this application provide a coating apparatus, including a coating head and a filtering assembly. The filtering assembly includes a filtering pipe, an output unit, a recovery unit, and a filter element. The filtering pipe is connected to the coating head. The pipe wall of the filtering pipe has a first interface and a second interface that are disposed opposite to each other along a first direction and are respectively openable and closable. The first direction intersects the extension direction of the filtering pipe. The output unit is connected to and communicates with the first interface, and the recovery unit is connected to and communicates with the second interface. The filter element includes a replacement part, a filtering part, and a recovery part connected in sequence. The replacement part is connected to the output unit. The filtering part is located inside the filtering pipe and is used to filter the slurry inside the filtering pipe. The recovery part is connected to the recovery unit. The output unit is used to deliver at least a portion of the replacement part to the filtering pipe to replace the filtering part. The recovery unit is used to recover the replaced filtering part and form part of the recovered part.

[0006] By adopting the above technical solution, when replacing the filter element, it is only necessary to send the replacement part to the filter pipeline through the output unit to replace the original filter part, and at the same time use the recycling unit to recover the replaced filter part, which can realize the replacement of the filter element. This can improve the replacement efficiency to a certain extent. Moreover, since the filter element is continuously transported in the filter pipeline, there is always a filter screen in the filter pipeline, so there is no need to stop the machine, reducing the impact of replacing the filter element on production efficiency. In addition, the replacement process does not require disassembling the filter pipeline, thus reducing the waste of coating slurry and reducing the possibility of the filter pipeline being exposed to the outside environment and causing pollution.

[0007] In some embodiments of this application, at least a portion of the replacement portion is wound within the output unit, which is used to unwind the replacement portion.

[0008] By adopting the above technical solution, the replacement part is wound around the output unit, and the output unit is used to unwind the replacement part. This can reduce the space occupied by the replacement part and meet the needs of replacing the filter elements in the filter pipeline multiple times.

[0009] In some embodiments of this application, the output unit includes a first storage chamber, a first connecting chamber, an unwinding mechanism, and a first valve body. The first storage chamber is used to store the replacement part. The first connecting chamber is connected and communicates between the first storage chamber and the first interface. Along the direction away from the first storage chamber, the unwinding mechanism and the first valve body are sequentially installed in the first connecting chamber. The unwinding mechanism is used to unwind the replacement part, and the first valve body is used to open and close the communication between the first interface and the first connecting chamber.

[0010] The above technical solution is adopted, and the output unit is designed to include a first storage chamber, a first connecting chamber, an unwinding mechanism and a first valve body. The first storage chamber is used to place the replacement part, and the unwinding mechanism is used to unwind the replacement part. When the filter part is replaced, the first valve body is opened to facilitate the unwinding mechanism. After the replacement is completed, the first valve body is closed to reduce the flow rate of coating slurry into the first storage chamber, thereby reducing the contamination of the replacement part.

[0011] In some embodiments of this application, the unwinding mechanism includes a first rotating shaft and a second rotating shaft, which are arranged parallel to each other along the extension direction of the filter pipe and are respectively connected to the first communicating chamber in a manner that allows them to rotate about their own axial direction. The first rotating shaft and the second rotating shaft are used to clamp and transport the replacement part.

[0012] The above technical solution is adopted, and the unwinding mechanism is designed to include a first rotating shaft and a second rotating shaft. When the filter part needs to be replaced, the first rotating shaft and / or the second rotating shaft are rotated. The first rotating shaft and the second rotating shaft rotate in opposite directions, driving the replacement part to be transported towards the filter pipe. The structure is simple and easy to implement.

[0013] In some embodiments of this application, the output unit further includes a second valve body, which is installed in the first communicating chamber. The unwinding mechanism is located between the first valve body and the second valve body. The second valve body is used to open or close the communication between the first communicating chamber and the first storage chamber.

[0014] Using the above technical solution, the output unit is designed to also include a second valve body. After the unwinding mechanism temporarily stores the replacement part, the second valve body is closed, thereby preventing the slurry from entering the first storage chamber and contaminating the replacement part during the process of the replacement part entering the first interface. Then, the replacement part temporarily stored by the unwinding mechanism can be replaced. After the temporary storage part is consumed, the first valve body is closed and the second valve body is opened. The unwinding mechanism continues to temporarily store the replacement part, which can also prevent the slurry from entering the first storage chamber and contaminating the replacement part during the process of the replacement part entering the first interface.

[0015] In some embodiments of this application, the unwinding mechanism further includes a first driving member located outside the first communicating cavity, the first driving member being connected to the first rotating shaft and used to drive the first rotating shaft to rotate.

[0016] By adopting the above technical solution, the first driving component is used to drive the first rotating shaft to rotate, which facilitates the rotation of the first rotating shaft.

[0017] In some embodiments of this application, the top of the first storage chamber is open and a first top cover is detachably installed.

[0018] Using the above technical solution, the first storage chamber is designed with a top opening, and a removable first top cover is installed at the top opening to facilitate the insertion of the filter element.

[0019] In some embodiments of this application, a first spool is detachably mounted in the first storage chamber, and the first spool is wound around the first spool.

[0020] Using the above technical solution, a first reel is detachably installed in the first storage chamber, which facilitates the winding of the replacement part and allows it to be disassembled and assembled together with the replacement part.

[0021] In some embodiments of this application, at least a portion of the recycling section is wound within the recycling unit, which is used to wind up the filter section.

[0022] By adopting the above technical solution, the recycling section is wound around the recycling unit, which is used to rewind the filter section. This reduces the space occupied by the recycling section and facilitates the recycling of the filter section.

[0023] In some embodiments of this application, the recycling unit includes a second storage chamber, a second connecting chamber, a recycling mechanism, and a third valve body. The second storage chamber is used to store the recycled part. The second connecting chamber is connected to the second storage chamber and the second interface respectively. Along the direction away from the second storage chamber, the recycling mechanism and the third valve body are sequentially installed in the second connecting chamber. The recycling mechanism is used to transport the recycled part to the second storage chamber, and the third valve body is used to open and close the connection between the second interface and the second connecting chamber.

[0024] Using the above technical solution, the recycling unit is designed to include a second storage chamber, a second connecting chamber, a recycling mechanism, and a third valve body. The second storage chamber is used to place the replacement part, and the recycling mechanism is used to recycle the filter part. When the filter part is replaced, the third valve body is opened to facilitate the recycling mechanism to rewind it. After the replacement is completed, the third valve body is closed to reduce the flow rate of coating slurry entering the second storage chamber.

[0025] In some embodiments of this application, the recycling mechanism includes a third rotating shaft and a fourth rotating shaft, which are arranged parallel to each other along the extension direction of the filter pipe and are respectively connected to the second communicating chamber in a manner that allows them to rotate about their own axial direction. The third rotating shaft and the fourth rotating shaft are used to clamp and convey the recycling section.

[0026] Using the above technical solution, the recycling mechanism is designed to include a third rotating shaft and a fourth rotating shaft. When the filter needs to be recycled, the first rotating shaft and / or the second rotating shaft are rotated. The first rotating shaft and the second rotating shaft rotate in opposite directions, driving the recycling part into the second storage chamber for recycling. The structure is simple and easy to implement.

[0027] In some embodiments of this application, the recycling mechanism further includes a second driving member located outside the second communicating chamber, the second driving member being connected to the third rotating shaft and used to drive the third rotating shaft to rotate.

[0028] By adopting the above technical solution, the second driving component is used to drive the third rotating shaft to rotate, which facilitates the rotation of the third rotating shaft.

[0029] In some embodiments of this application, the output unit further includes a fourth valve body, which is installed in the second communicating chamber, and the recycling mechanism is located between the third valve body and the fourth valve body. The fourth valve body is used to open or close the communication between the second communicating chamber and the second storage chamber.

[0030] By adopting the above technical solution, the recycling unit is designed to also include a fourth valve body. After the recycling mechanism temporarily stores the filter section, the fourth valve body is closed, thereby preventing the possibility of slurry entering the second storage chamber during the process of the filter section leaving the second interface, reducing slurry waste. When the amount of filter section temporarily stored by the recycling mechanism reaches a certain amount, the third valve body is closed and the fourth valve body is opened, and the recycling mechanism transports the temporarily stored filter section to the second storage chamber, which can also prevent the possibility of slurry entering the second storage chamber during the process of the filter section leaving the second interface, further reducing slurry waste.

[0031] In some embodiments of this application, the second storage chamber has an opening at the top and is detachably fitted with a second top cover.

[0032] Using the above technical solution, the second storage chamber is designed with a top opening, and a detachable second top cover is installed at the top opening to facilitate the removal of the filter element.

[0033] In some embodiments of this application, a second reel is detachably mounted in the second storage chamber for winding the recovery unit.

[0034] Using the above technical solution, a second reel is detachably installed in the second storage chamber to facilitate the recycling and winding of the filter section. Moreover, after the filter element is completely recycled, the second reel can be removed together with the filter element.

[0035] In some embodiments of this application, the filter pipe is provided with a first pipe joint and a second pipe joint communicating with its interior on both sides along the first direction, the first pipe joint being provided with the first interface and the second pipe joint being provided with the second interface.

[0036] By adopting the above technical solution, the filter pipe is designed with a first pipe joint and a second pipe joint on both sides. A first interface is opened on the first pipe joint and a second interface is opened on the second pipe joint. The first pipe joint and the second pipe joint not only facilitate the connection of the filter pipe to the output unit and the recovery unit, but also extend the distance between the first interface and the second interface, thereby increasing the size of the filter part in the filter pipe and improving the filtration effect and efficiency.

[0037] Secondly, embodiments of this application provide a battery production system, including a coating apparatus as described in any of the above technical solutions. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0039] Figure 1 A schematic diagram of the coating apparatus provided in some embodiments of this application from one viewpoint;

[0040] Figure 2 A schematic diagram of the coating apparatus provided in some embodiments of this application from another perspective;

[0041] Figure 3 A partial structural schematic diagram (I) of a coating apparatus provided in some embodiments of this application;

[0042] Figure 4 for Figure 3 Enlarged view of part A;

[0043] Figure 5 A partial structural schematic diagram (II) of the coating apparatus provided in some embodiments of this application;

[0044] Figure 6 for Figure 5 Enlarged view of part b;

[0045] Figure 7 A schematic diagram of the coating apparatus provided in some embodiments of this application after the first and second upper covers are opened;

[0046] Figure 8 A partial structural schematic diagram (III) of the coating apparatus provided in some embodiments of this application.

[0047] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0048] 100. Filter components;

[0049] 10. Filter pipe; 11. First pipe fitting; 111. First interface; 12. Second pipe fitting; 121. Second interface;

[0050] 20. Output unit; 21. First storage chamber; 211. First top cover; 212. First reel; 22. First connecting chamber; 23. Unwinding mechanism; 231. First rotating shaft; 232. First driving component; 24. First valve body; 241. First valve plate; 242. First operating handle; 25. Second valve body; 251. Second valve plate; 252. Second operating handle;

[0051] 30. Recycling unit; 31. Second storage chamber; 311. Second top cover; 312. Second reel; 32. Second connecting chamber; 33. Recycling mechanism; 331. Third rotating shaft; 332. Second driving component; 34. Third valve body; 341. Third valve plate; 342. Third operating handle; 35. Fourth valve body; 351. Fourth valve plate; 352. Fourth operating handle;

[0052] 40. Filter element; 41. Replacement section; 42. Filter section; 43. Recovery section;

[0053] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0055] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "including," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0056] In this application, the reference to "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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0057] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0058] 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 three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0059] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0060] In this application, "multiple" means two or more (including two).

[0061] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack. A battery generally includes a battery housing for encapsulating one or more battery cells. The battery housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0062] The battery cells mentioned in the embodiments of this application can be lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, etc., and the embodiments of this application are not limited in this regard. The battery cells can be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited in this regard either.

[0063] The battery cell mentioned in the embodiments of this application may include an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode, a negative electrode, and a separator. The battery cell mainly relies on the movement of metal ions between the positive and negative electrode plates to operate. The positive electrode includes a positive current collector and a positive active material layer, with the positive active material layer coated on the surface of the positive current collector. The positive current collector includes a positive electrode coating area and a positive electrode tab connected to the positive electrode coating area. The positive electrode coating area is coated with the positive active material layer, while the positive electrode tab is not coated with the positive active material layer. Taking a lithium-ion battery cell as an example, the material of the positive current collector can be aluminum, and the positive active material layer includes positive active material, which can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer being coated on the surface of the negative electrode current collector. The negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area. The negative electrode coating area is coated with the negative electrode active material layer, while the negative electrode tab is not coated with the negative electrode active material layer. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes negative electrode active material, which can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0064] The battery cells described in this application are applicable to batteries and electrical devices that use batteries. Electrical devices can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0065] The embodiments of this application will now be described in detail.

[0066] Currently, battery devices are being used more and more widely. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0067] During the production of battery devices, active material slurry is applied to the electrode sheets. The slurry is filtered by a filtration system as it is output to the coating head. However, even after filtration, a certain number of particles and agglomerates still enter the coating extrusion head along with the anode and cathode slurry. Eventually, these particles become clogged between the extrusion head lip and the coating back roller, causing production abnormalities such as particle scratches, dark marks, and scraping. Scratches can break the anode and cathode battery films that are being produced. Battery films with particle scratches will be detected as defective products in the material preparation process. Dark marks may flow into the battery cells, causing lithium plating and affecting product yield.

[0068] The relevant technology usually involves using clips to fix the filter screen at the connection of the slurry conveying pipeline for secondary filtration. This filtration method requires disassembling the pipeline to replace the filter screen, which is inefficient, wastes a lot of production time, reduces production efficiency, and may also lead to waste of battery slurry and contamination of the slurry in the pipeline by foreign objects.

[0069] Therefore, improving the efficiency of filter replacement and reducing the possibility of wasting battery slurry and causing foreign objects to contaminate the slurry in the pipeline is an important issue in battery production and processing.

[0070] In view of this, this application provides a technical solution in which an output unit for outputting filter elements and a recycling unit for recycling filter elements are arranged on both sides of the filter pipe. When replacing the filter element, the output unit provides a replacement part for the filter element, and the recycling unit recycles the original filter element. The entire replacement process only passes through the internal space of the pipe and the filter element can be replaced without disassembling the pipe, thereby solving the above-mentioned technical problems.

[0071] The following is in conjunction with the appendix Figure 1-8 The coating apparatus provided in the embodiments of this application will be described.

[0072] Combined with appendix Figure 1-3As shown in the figure, this application provides a coating apparatus, including a coating head and a filter assembly 100. The filter assembly 100 includes a filter pipe 10, an output unit 20, a recovery unit 30, and a filter element 40. The filter pipe 10 is connected to the coating head. The pipe wall of the filter pipe 10 has a first interface 111 and a second interface 121 that are arranged opposite to each other along a first direction X and are respectively openable and closable. The first direction X intersects the extension direction of the filter pipe 10. The output unit 20 is connected to and communicates with the first interface 111, and the recovery unit 30 is connected to the first interface 111. The two interfaces 121 are connected and communicated; the filter element 40 includes a replacement part 41, a filter part 42 and a recovery part 43 connected in sequence. The replacement part 41 is connected to the output unit 20. The filter part 42 is located in the filter pipe 10 and is used to filter the slurry in the filter pipe 10. The recovery part 43 is connected to the recovery unit 30. The output unit 20 is used to deliver the replacement part 41 to the filter pipe 10 to replace the filter part 42. The recovery unit 30 is used to recover the replaced filter part 42 and form the replaced filter part 42 into part of the recovery part 43.

[0073] The coating head (not shown in the figure) is directly connected to and communicates with the filter pipe 10, or indirectly connected and communicates with it through an intermediate pipe. The coating head is mainly used to uniformly coat the slurry on the electrode substrate. In some embodiments, it can be an extrusion coating head in related technologies. Therefore, this embodiment does not include a description of its figure and structure.

[0074] In addition to the coating head and the filter assembly 100, the coating apparatus provided in this application embodiment may also include a slurry supply assembly (not shown in the figure), which is connected and communicates with the filter assembly 100 and is used to supply coating slurry to the filter pipe 10.

[0075] The filter pipe 10 is a structure for conveying slurry to the coating head and filtering the slurry. The filter pipe 10 can be a structure with openings at both ends along its extension direction (the third direction Z in the figure). The pipe wall of the filter pipe 10 is provided with a first interface 111 and a second interface 121 arranged opposite to each other along the first direction X. The first direction X intersects the extension direction of the filter pipe 10. In some embodiments, the first direction X is a radial direction perpendicular to the extension direction of the filter pipe 10.

[0076] The first interface 111 and the second interface 121 are both openable and closable interfaces. It can be understood that the "openability and closability" of the first interface 111 can be achieved by directly configuring a switch structure on the first interface 111 to open and close it, or indirectly by opening and closing a structure connected to the first interface 111 (such as the first connecting chamber 22 described below). Similarly, the "openability and closability" of the second interface 121 should be understood in the same way.

[0077] Unlike traditional methods where filters are directly installed inside pipes, the filter element 40 in this embodiment, in addition to the filter section 42 located inside the filter pipe 10, also has a replacement section 41 located inside the output unit 20 and a recovery section 43 located inside the recovery unit 30. It can be understood that the replacement section 41, the filter section 42, and the recovery section 43 are only different in position. When the replacement section 41 enters the filter pipe 10 and performs the filtering function, the replacement section 41 becomes the filter section 42. Similarly, when the filter section 42 enters the recovery unit 30, the filter section 42 becomes the recovery section 43.

[0078] In some embodiments, the replacement part 41, the filtering part 42, and the recycling part 43 are integrally formed, and the replacement part 41 can be as follows: Figure 7 and 8 The filter section 42 shown is present in a wound manner, but it can also be present in a stacked or other arrangement manner. The replacement section 41 needs to have a certain radial dimension along the filter pipe 10 after being unfolded, so that the filter section 42 can be replaced once or multiple times. Similarly, the recycling section 43 can also be present in a wound, stacked, or other manner.

[0079] Combined with appendix Figure 2 and 8 As shown, the area of ​​the filter section 42 in this embodiment should be greater than or equal to the flow area of ​​the filter pipe 10 between the output unit 20 and the recovery unit 30 (the cross-sectional area of ​​the filter pipe 10 for slurry flow), so that the slurry can be filtered when passing through the filter section 42.

[0080] In some embodiments, the filter element 40 may be a flexible filter structure, which facilitates winding or stacking.

[0081] In this embodiment, the output unit 20 is connected to and communicates with the first interface 111, the output unit 20 is connected to the replacement part 41 of the filter element 40, and is used to deliver the replacement part 41 to the filter pipe 10. The recycling unit 30 is connected to and communicates with the second interface 121, and is used to recycle the filter part 42.

[0082] When replacing the filter element 40, the replacement part 41 is simply conveyed to the filter pipe 10 through the output unit 20 to replace the original filter part 42, and the replaced filter part 42 is simultaneously recovered by the recycling unit 30. This can improve the replacement efficiency to a certain extent. Moreover, since the filter element 40 is continuously conveyed in the filter pipe 10, and the filter screen is always present in the filter pipe 10, there is no need to stop the machine, which reduces the impact of replacing the filter element 40 on production efficiency. In addition, the replacement process does not require disassembling the filter pipe 10, thus reducing the waste of coating slurry and the possibility of the filter pipe 10 being exposed to the outside environment and becoming contaminated.

[0083] In some examples, optionally, at least a portion of the replacement part 41 is wound within the output unit 20, which is used to unwind the replacement part 41.

[0084] The replacement section 41 is at least partially wound within the output unit 20, and the recovery section 43 is stored in the recovery unit 30 by means of winding or stacking. In some embodiments, the output unit 20 may include only one rotatable unwinding roller.

[0085] In this embodiment, the replacement part 41 is wound around the output unit 20, and the output unit 20 is used to unwind the replacement part 41. This can reduce the space occupied by the replacement part 41 and meet the need for multiple replacements of the filter element 40 in the filter pipe 10.

[0086] Combined with appendix Figure 1-3 As shown, in some examples, the output unit 20 optionally includes a first storage chamber 21, a first connecting chamber 22, an unwinding mechanism 23, and a first valve body 24. The first storage chamber 21 is used to store the replacement part 41. The first connecting chamber 22 is connected and communicates between the first storage chamber 21 and the first interface 111. Along the direction away from the first storage chamber 21, the unwinding mechanism 23 and the first valve body 24 are sequentially installed in the first connecting chamber 22. The unwinding mechanism 23 is used to unwind the replacement part 41, and the first valve body 24 is used to open and close the communication between the first interface 111 and the first connecting chamber 22.

[0087] The first storage chamber 21 is mainly used to wind and store most of the replacement part 41. The shape of the first storage chamber 21 can be a cylindrical chamber with an annular cross section, a rectangular chamber, or other shapes. The replacement part 41 is wound and placed in the first storage chamber 21.

[0088] The first connecting chamber 22 is mainly used to connect the first storage chamber 21 and the filter pipe 10, and it has a small number of replacement parts 41 inside. The first connecting chamber 22 is also used to install the unwinding mechanism 23 and the first valve body 24. The shape of the first connecting chamber 22 is not limited, such as the rectangular chamber in the figure, or the cylindrical chamber, etc., as long as it is a chamber structure with open ends. One end of the first connecting chamber 22 is used to connect and communicate with the first storage chamber 21, and the other end is used to connect and communicate with the filter pipe 10.

[0089] The unwinding mechanism 23 is used to connect the replacement part 41 located in the first communicating chamber 22 and to deliver the replacement part 41 to the filter pipe 10.

[0090] The first valve body 24 can be a mechanical valve, combined with the attached... Figure 4As shown, the first valve body 24 may include a first valve plate 241 located inside the first communicating chamber 22 and a first operating handle 242 located outside the first communicating chamber 22. The first valve plate 241 and the first operating handle 242 are connected. Rotating the first operating handle 242 can drive the first valve plate 241 to rotate, thereby opening and closing the communication between the first interface 111 and the first communicating chamber 22, and thus realizing the opening and closing of the first interface 111.

[0091] When the filter section 42 is replaced, the first valve body 24 is opened to facilitate the unwinding mechanism 23 to unwind. After the replacement is completed, the first valve body 24 is closed. At this time, the first valve body 24 presses against the replacement section 41 located in the first connecting chamber 22 and the inner wall of the first connecting chamber 22. Since the replacement section 41 is a filter screen structure with a small thickness, the first valve body 24 is not affected by the replacement section 41 when it is closed. It can close the connection between the first interface 111 and the first connecting chamber 22, thereby reducing the flow rate of coating slurry entering the first storage chamber 21 and thus reducing the contamination of the replacement section 41.

[0092] Combined with appendix Figure 3 and 4 As shown, in some examples, the unwinding mechanism 23 may optionally include a first rotating shaft 231 and a second rotating shaft (not shown in the figure), the first rotating shaft 231 and the second rotating shaft are arranged parallel to each other along the extension direction of the filter pipe 10 and are respectively connected to the first communicating chamber 22 in a manner that rotates about its own axis, the first rotating shaft 231 and the second rotating shaft are used to clamp the conveying replacement part 41.

[0093] Figure 4 This is a schematic diagram of the hidden portion of the first communicating chamber 22 of the coating apparatus according to an embodiment of this application. The purpose of hiding it is mainly to make it easier to see the internal structure of the first communicating chamber 22. It should be noted that, due to Figure 4 Due to the obstruction of the first rotating shaft 231 and the replacement part 41, the second rotating shaft is not shown in this embodiment.

[0094] The first rotating shaft 231 and the second rotating shaft extend along the second direction Y in the figure. The second direction Y intersects the extension direction of the filter pipe 10 and the arrangement direction of the output unit 20 to the recycling unit 30. In some embodiments, the second direction Y is perpendicular to the extension direction of the filter pipe 10 and the arrangement direction of the output unit 20 to the recycling unit 30, respectively.

[0095] The first rotating shaft 231 and the second rotating shaft can be arranged along the extension direction of the filter pipe 10 (the third direction Z in the figure), so that the first rotating shaft 231 and the second rotating shaft form a gap along the extension direction of the filter pipe 10.

[0096] The first rotating shaft 231 and the second rotating shaft clamp the replacement part 41 between them. When the replacement part 41 needs to be transported, the first rotating shaft 231 can rotate in one circumferential direction and the second rotating shaft can rotate in the opposite circumferential direction, thereby driving the replacement part 41 to move towards the filter pipe 10 to complete the replacement of the filter part 42. During this process, the recycling unit 30 performs recycling operations simultaneously.

[0097] The first rotating shaft 231 and the second rotating shaft can be one that rotates actively and the other that rotates passively, or both of them can rotate actively. This embodiment does not impose too many limitations on this, as long as the replacement part 41 can be conveyed towards the filter pipe 10.

[0098] The unwinding mechanism 23 is designed to include a first rotating shaft 231 and a second rotating shaft. When the filter part 42 needs to be replaced, the first rotating shaft 231 and / or the second rotating shaft are rotated. The first rotating shaft 231 and the second rotating shaft rotate in opposite directions, driving the replacement part 41 to be conveyed towards the filter pipe 10. The structure is simple and easy to implement.

[0099] Combined again with the appendix Figure 3 and 4 As shown, in some examples, the output unit 20 may optionally include a second valve body 25, which is installed in the first communicating chamber 22. The unwinding mechanism 23 is located between the first valve body 24 and the second valve body 25. The second valve body 25 is used to open or close the communication between the first communicating chamber 22 and the first storage chamber 21.

[0100] The second valve body 25 has the same or similar structure as the first valve body 24. It may include a second valve plate 251 located inside the first communicating chamber 22 and a second operating handle 252 located outside the first communicating chamber 22. The second valve plate 251 and the second operating handle 252 are connected. Rotating the second operating handle 252 can drive the second valve plate 251 to rotate, thereby opening and closing the communication between the first communicating chamber 22 and the first storage chamber 21.

[0101] The reason for configuring the second valve body 25 is that during the conveying process of the replacement section 41, due to the opening of the first valve body 24, some slurry will flow into the first communicating chamber 22 through the first interface 111 and enter the first storage chamber 21, contaminating the unused replacement section 41.

[0102] Therefore, this embodiment is equipped with a second valve body 25. When the filter section 42 needs to be replaced, the first valve body 24 is closed and the second valve body 25 is opened. Then, the first rotating shaft 231 and the second rotating shaft are used for unwinding, so that the replacement section 41 of a certain size is stored in the first connecting chamber 22. During this process, because the second valve body 25 is closed, the slurry will not enter the first connecting chamber 22 and the first storage chamber 21, thus reducing the possibility of slurry contaminating the replacement section 41.

[0103] Subsequently, the second valve body 25 is closed and the first valve body 24 is opened. Through the conveying action of the first rotating shaft 231 and the second rotating shaft, and the recycling action of the recycling unit 30, the replacement part 41 stored in the first connecting chamber 22 replaces the original filter part 42. In this process, because the second valve body 25 is closed, the possibility of slurry in the first connecting chamber 22 entering the first storage chamber 21 is reduced, thus reducing the possibility of slurry contaminating the replacement part 41.

[0104] As can be seen from the above description, the output unit 20 in this embodiment is designed to also include a second valve body 25. After the unwinding mechanism 23 temporarily stores the replacement part 41, the second valve body 25 is closed, thereby preventing the slurry from entering the first storage chamber 21 and contaminating the replacement part 41 during the process of the replacement part 41 entering the first interface 111. Then, the replacement part 41 temporarily stored by the unwinding mechanism 23 can be replaced. After the temporary storage part is consumed, the first valve body 24 is closed and the second valve body 25 is opened. The unwinding mechanism 23 continues to temporarily store the replacement part 41, which can also prevent the slurry from entering the first storage chamber 21 and contaminating the replacement part 41 in advance during the process of the replacement part 41 entering the first interface 111.

[0105] Combined with appendix Figure 1-6 As shown, in some examples, the unwinding mechanism 23 may optionally include a first drive member 232 located outside the first communicating chamber 22, the first drive member 232 being connected to the first rotating shaft 231 and used to drive the first rotating shaft 231 to rotate.

[0106] The first driving component 232 can be an active driving component, such as a motor or other structure that outputs torque. The first driving component 232 can also be a passive driving component, similar to a rotary handle, as shown in the figure. In this case, the first driving component 232 can be rotated manually or by other instruments to drive the rotation of the first rotating shaft 231, so that the first rotating shaft 231 can be rotated.

[0107] When the first rotating shaft 231 is driven to rotate by the first driving member 232 in this embodiment, the first rotating shaft 231 is the driving shaft and the second rotating shaft is the driven shaft during the conveying process of the replacement part 41.

[0108] Of course, a drive structure (not shown in the figure) can also be configured to drive the second shaft to rotate, but this method is more complex and costly than configuring only the first drive component 232.

[0109] In addition, the structure of the unwinding mechanism 23 in this embodiment is not limited to the above-mentioned rotating shaft structure, but can also be other structures that can transport the filter element 40, such as a robotic arm.

[0110] Combined with appendix Figure 1 Appendix Figure 7 and 8 As shown, in some examples, the top of the first storage chamber 21 is optionally open and a first cover 211 is removably mounted.

[0111] The first top cover 211 can be placed directly at the top opening of the first storage chamber 21, or it can be installed at the top opening of the first storage chamber 21 by mechanical connection methods such as snap-fit ​​or bolt connection.

[0112] The materials of the first top cover 211 and the first storage chamber 21 can be the same or different; for example, both can be made of metal.

[0113] The first storage chamber 21 is designed with a top opening, and a detachable first top cover 211 is installed at the top opening, so that the filter element 40 can be directly opened for placement and removal.

[0114] In some embodiments, the first communicating chamber 22 and the second communicating chamber 32 described below may also be designed with an openable upper end, thereby facilitating the replacement of the entire filter element 40.

[0115] Combined again with the appendix Figure 7 and 8 As shown, in some examples, optionally, a first spool 212 is detachably mounted in the first storage chamber 21, and the first spool 212 is wound around the first spool 212.

[0116] The first reel 212 can be inserted into or threadedly connected to the bottom wall of the first storage chamber 21 via the mounting structure. The first reel 212 is installed on the mounting structure in a manner that allows it to rotate around its own axis. Alternatively, the first reel 212 can be directly inserted into the bottom wall of the first storage chamber 21 in a manner that allows it to rotate around its own axis.

[0117] The first reel 212 can be connected to one end of the filter element 40. After the filter element 40 is fully installed, most of the replacement part 41 is wound around the first reel 212. When the replacement part 41 is conveyed toward the filter pipe 10, the first reel 212 can rotate around its own axis, thereby facilitating the unwinding of the replacement part 41.

[0118] In this embodiment, a first reel 212 is detachably installed in the first storage chamber 21 to facilitate the winding of the replacement part 41, and it can be disassembled and assembled together with the replacement part 41.

[0119] In some examples, the retraction section 43 is optionally wound at least partially within the retraction unit 30, which is used to rewind the retraction section 43.

[0120] The recycling section 43 is wound around the recycling unit 30, which is used to recycle the filter section 42. This reduces the space occupied by the recycling section 43 and makes it easier to recycle the filter section 42.

[0121] In some embodiments, the recovery unit 30 may include only one recovery roller (this embodiment is not shown in the figure), or it may include other winding structures.

[0122] Combined with appendix Figure 1-3 and appendix Figure 5 and attached Figure 6 As shown, in some examples, optionally, the recycling unit 30 includes a second storage chamber 31, a second connecting chamber 32, a recycling mechanism 33, and a third valve body 34. The second storage chamber 31 is used to store the recycling part 43. The second connecting chamber 32 is connected to the second storage chamber 31 and the second interface 121 respectively. Along the direction away from the second storage chamber 31, the recycling mechanism 33 and the third valve body 34 are sequentially installed in the second connecting chamber 32. The recycling mechanism 33 is used to transport the recycling part 43 to the second storage chamber 31, and the third valve body 34 is used to open and close the connection between the second interface 121 and the second connecting chamber 32.

[0123] Most of the recovery section 43 is wound and stored in the second storage chamber 31. The second storage chamber 31 has the same or similar structure as the first storage chamber 21 mentioned above. For example, the second storage chamber 31 can also be a cylindrical chamber. In some embodiments, the first storage chamber 21 is located on one side of the coating device along the first direction X, and the second storage chamber 31 is located on the other side of the coating device along the first direction X.

[0124] The second connecting chamber 32 is mainly used to connect the second storage chamber 31 and the filter pipe 10, and it has a small number of recovery parts 43 inside. At the same time, the second connecting chamber 32 is also used to install the recovery mechanism 33 and the third valve body 34. The shape of the second connecting chamber 32 is not limited, such as the rectangular chamber in the figure, or the cylindrical chamber, etc., as long as it is a chamber structure with open ends.

[0125] The recycling mechanism 33 is used to connect the recycling section 43 located in the second communicating chamber 32 and to transport the recycling section 43 to the second storage chamber 31 to facilitate the winding of the recycling section 43.

[0126] The third valve body 34 can be a mechanical valve, combined with the attached... Figure 4 As shown, the third valve body 34 may include a third valve plate 341 located inside the second communicating chamber 32 and a third operating handle 342 located outside the second communicating chamber 32. The third valve plate 341 and the third operating handle 342 are connected. Rotating the third operating handle 342 can drive the third valve plate 341 to rotate, thereby opening and closing the connection between the second interface 121 and the second communicating chamber 32, and thus realizing the opening and closing of the second interface 121.

[0127] In this embodiment, the recycling unit 30 is designed to include a second storage chamber 31, a second connecting chamber 32, a recycling mechanism 33, and a third valve body 34. The second storage chamber 31 is used to place the replacement part 41, and the recycling mechanism 33 is used to recycle the filter part 42. When the filter part 42 is replaced, the third valve body 34 is opened to facilitate the recycling mechanism 33 to rewind it. After the replacement is completed, the third valve body 34 is closed to reduce the flow rate of the coating slurry into the second storage chamber 31.

[0128] In some examples, the recycling mechanism 33 may optionally include a third rotating shaft 331 and a fourth rotating shaft (not shown in the figure), which are arranged parallel to each other along the extension direction of the filter pipe 10 and are respectively connected to the second communicating chamber 32 in a manner that allows them to rotate about their own axial direction. The third rotating shaft 331 and the fourth rotating shaft are used to clamp the conveying recycling section 43.

[0129] The third rotating shaft 331 and the fourth rotating shaft can be arranged along the extension direction of the filter pipe 10, so that the third rotating shaft 331 and the fourth rotating shaft are spaced apart along the extension direction of the filter pipe 10.

[0130] The third rotating shaft 331 and the fourth rotating shaft clamp the recovery part 43 between them. When it is necessary to transport the recovery part 43 to the second storage chamber 31, the third rotating shaft 331 can rotate in one circumferential direction and the fourth rotating shaft can rotate in the opposite circumferential direction, thereby driving the recovery part 43 to move towards the second storage chamber 31.

[0131] The third rotating shaft 331 and the fourth rotating shaft can be either actively rotating and passively rotating, or both can be actively rotating. This embodiment does not impose too many restrictions on this, as long as the recovery unit 43 can be transported towards the second storage chamber 31.

[0132] The recycling mechanism 33 is designed to include a third rotating shaft 331 and a fourth rotating shaft. When the filter section 42 needs to be recycled, the third rotating shaft 331 and / or the fourth rotating shaft are rotated. The third rotating shaft 331 and the fourth rotating shaft rotate in opposite directions, driving the recycling section 43 into the second storage chamber 31 for recycling. The structure is simple and easy to implement.

[0133] In some examples, the recycling mechanism 33 may optionally include a second drive member 332 located outside the second communicating chamber 32, the second drive member 332 being connected to the third rotating shaft 331 and used to drive the third rotating shaft 331 to rotate.

[0134] The second drive member 332 is coaxially connected to the third rotating shaft 331 and the two rotate synchronously. The structure of the second drive member 332 is the same as or similar to that of the first drive member 232 mentioned above.

[0135] The second driving component 332 can be an active driving component such as a motor, or a passive driving component such as a handle. When the second driving component 332 is a passive driving component, it can be driven to rotate by manual labor or a mechanical arm, thereby realizing the rotation of the third rotating shaft 331.

[0136] In some examples, the output unit 20 may optionally include a fourth valve body 35, which is installed in the second communication chamber 32, and the recovery mechanism 33 is located between the third valve body 34 and the fourth valve body 35. The fourth valve body 35 is used to open and close the communication between the second communication chamber 32 and the second storage chamber 31.

[0137] The fourth valve body 35 is mainly used to reduce the possibility of slurry in the second connecting chamber 32 entering the second storage chamber 31, thereby reducing slurry waste.

[0138] In some embodiments, the fourth valve body 35 includes a fourth valve plate 351 located in the second communicating chamber 32 and a fourth operating handle 352 located outside the second communicating chamber 32. The fourth operating handle 352 is coaxially connected to the fourth valve plate 351. By rotating the fourth operating handle 352, the fourth valve plate 351 is driven to open or close the communication between the second storage chamber 31 and the second communicating chamber 32.

[0139] When recycling the filter section 42, the third valve body 34 is opened first. At this time, the third rotating shaft 331 and the fourth rotating shaft temporarily store and transport the replaced recycling section 43 (the original filter section 42) into the second connecting chamber 32. The recycling section 43 exists in the second connecting chamber 32 in a folded or rolled manner. At this time, the fourth valve body 35 is closed, thereby preventing the possibility of slurry entering the second storage chamber 31 during the process of the filter section 42 leaving the second interface 121, reducing the waste of slurry.

[0140] When the amount of filter section 42 temporarily stored in the recycling mechanism 33 reaches a certain level, the third valve body 34 is closed and the fourth valve body 35 is opened. The recycling mechanism 33 then transports the temporarily stored filter section 42 to the second storage chamber 31. This also prevents the possibility of slurry entering the second storage chamber 31 during the process of the filter section 42 leaving the second interface 121, further reducing the waste of slurry.

[0141] In some examples, the second storage chamber 31 may optionally have an opening at the top and a second cover 311 may be removably mounted on it.

[0142] The second cover 311 can be placed directly at the top opening of the second storage chamber 31, or it can be installed at the top opening of the second storage chamber 31 by mechanical connection methods such as snap-fit ​​or bolt connection.

[0143] The materials of the first heating cover and the second storage chamber 31 can be the same or different; for example, both can be made of metal.

[0144] The second storage chamber 31 is designed with a top opening, and a detachable second top cover 311 is installed at the top opening, which can be opened directly to take out and put in the filter element 40.

[0145] Combined again with the appendix Figure 7 and 8 As shown, in some examples, optionally, a second reel 312 is detachably installed in the second storage chamber 31 for winding the recovery section 43.

[0146] The second spool 312 is mounted on the bottom wall of the second storage chamber 31 in a manner that allows it to rotate about its own axis. The mounting method can be a direct connection or an indirect connection, such as directly inserting the second spool 312 into the bottom wall of the second storage chamber 31.

[0147] A second reel 312 is detachably installed in the second storage chamber 31 to facilitate the recycling and winding of the filter section 42. Moreover, after the filter element 40 is completely recycled, the second reel 312 can be removed together with the filter element 40.

[0148] Combined with appendix Figure 1 and 2 As shown, in some examples, optionally, the filter pipe 10 is provided with a first pipe joint 11 and a second pipe joint 12 communicating with its interior on both sides along the first direction X. The first pipe joint 11 is provided with a first interface 111 and the second pipe joint 12 is provided with a second interface 121.

[0149] The end of the first pipe connector 11 near the filter pipe 10 is connected to and communicates with the side wall opening of the filter pipe 10, and the end of the first pipe connector 11 away from the filter pipe 10 is provided with a first interface 111.

[0150] The end of the second pipe connector 12 near the filter pipe 10 is connected to and communicates with the side wall opening of the filter pipe 10, and the end of the second pipe connector 12 away from the filter pipe 10 is provided with a second interface 121.

[0151] The first pipe connector 11 and the second pipe connector 12 can be used to easily connect the filter pipe 10 to the output unit 20 and the recovery unit 30, and the distance between the first interface 111 and the second interface 121 can be extended, thereby increasing the size of the filter section 42 in the filter pipe 10 and improving the filtration effect and efficiency.

[0152] In addition, the top of the first pipe joint 11, the second pipe joint 12, and the portion of the filter pipe 10 between them can also be designed as an openable structure to facilitate the installation of the filter element 40.

[0153] 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.

[0154] Finally, please see the appendix. Figure 1-8As shown in the figure, this application provides a coating apparatus, including a coating head and a filter assembly 100. The filter assembly 100 includes a filter pipe 10, an output unit 20, a recovery unit 30, and a filter element 40. The filter pipe 10 is connected to the coating head. The pipe wall of the filter pipe 10 has a first interface 111 and a second interface 121 that are arranged opposite to each other along a first direction X and are respectively openable and closable. The first direction X intersects the extension direction of the filter pipe 10. The output unit 20 is connected to and communicates with the first interface 111, and the recovery unit 30 is connected to the first interface 111. Two interfaces 121 are connected and interconnected; the filter element 40 includes a replacement part 41, a filter part 42, and a recovery part 43 connected in sequence. The replacement part 41 is connected to the output unit 20, the filter part 42 is located inside the filter pipe 10 and is used to filter the slurry inside the filter pipe 10, and the recovery part 43 is connected to the recovery unit 30. The output unit 20 is used to deliver the replacement part 41 to the filter pipe 10 to replace the filter part 42, and the recovery unit 30 is used to recover the replaced filter part 42 and form part of the recovery part 43 from the replaced filter part 42. At least a portion of the replacement part 41 is wound inside the output unit 20, and the output unit 20 is used to unwind the replacement part 41. The output unit 20 includes a first storage chamber 21, a first connecting chamber 22, an unwinding mechanism 23, and a first valve body 24. The first storage chamber 21 is used to store the replacement part 41. The first connecting chamber 22 is connected and communicates between the first storage chamber 21 and the first interface 111. Along the direction away from the first storage chamber 21, the unwinding mechanism 23 and the first valve body 24 are sequentially installed in the first connecting chamber 22. The unwinding mechanism 23 is used to unwind the replacement part 41, and the first valve body 24 is used to open and close the communication between the first interface 111 and the first connecting chamber 22. The unwinding mechanism 23 includes a first rotating shaft 231 and a second rotating shaft. The first rotating shaft 231 and the second rotating shaft are arranged parallel to each other along the extension direction of the filter pipe 10 and are respectively connected to the first connecting chamber 22 by rotating around their own axial direction. The first rotating shaft 231 and the second rotating shaft are used to clamp and convey the replacement part 41. The output unit 20 also includes a second valve body 25, which is installed in the first communicating chamber 22. An unwinding mechanism 23 is located between the first valve body 24 and the second valve body 25. The second valve body 25 is used to open and close the communication between the first communicating chamber 22 and the first storage chamber 21. The unwinding mechanism 23 also includes a first drive member 232 located outside the first communicating chamber 22. The first drive member 232 is connected to a first rotating shaft 231 and is used to drive the first rotating shaft 231 to rotate. The top of the first storage chamber 21 has an opening and a first top cover 211 is detachably installed thereon. A first reel 212 is detachably installed inside the first storage chamber 21, and the first reel 212 is wound around the filter section 42. At least a portion of the recovery section 43 is wound within the recovery unit 30, which is used to wind up the filter section 42.The recycling unit 30 includes a second storage chamber 31, a second connecting chamber 32, a recycling mechanism 33, and a third valve body 34. The second storage chamber 31 is used to store the recycled part 43. The second connecting chamber 32 is connected to the second storage chamber 31 and the second interface 121. Along the direction away from the second storage chamber 31, the recycling mechanism 33 and the third valve body 34 are sequentially installed in the second connecting chamber 32. The recycling mechanism 33 is used to transport the recycled part 43 to the second storage chamber 31, and the third valve body 34 is used to open and close the connection between the second interface 121 and the second connecting chamber 32. The recycling mechanism 33 includes a third rotating shaft 331 and a fourth rotating shaft. The third rotating shaft 331 and the fourth rotating shaft are arranged parallel to each other along the extension direction of the filter pipe 10 and are connected to the second connecting chamber 32 by rotating around their own axial direction. The third rotating shaft 331 and the fourth rotating shaft are used to clamp and transport the recycled part 43. The recycling mechanism 33 also includes a second drive member 332 located outside the second communicating chamber 32. The second drive member 332 is connected to the third rotating shaft 331 and is used to drive the third rotating shaft 331 to rotate. The output unit 20 also includes a fourth valve body 35, which is installed in the second communicating chamber 32. The recycling mechanism 33 is located between the third valve body 34 and the fourth valve body 35. The fourth valve body 35 is used to open and close the communication between the second communicating chamber 32 and the second storage chamber 31. The top of the second storage chamber 31 is open and a second top cover 311 is detachably installed. A second reel 312 is detachably installed inside the second storage chamber 31 and is used to wind the recycling section 43. The filter pipe 10 has a first pipe joint 11 and a second pipe joint 12 connecting its interior on both sides along the first direction X. The first pipe joint 11 has a first interface 111 and the second pipe joint 12 has a second interface 121.

[0155] Based on the coating apparatus described above, this application also provides a battery production system, including the coating apparatus as described above. In addition to the coating apparatus, the battery production system may also include a drying apparatus for drying the coated electrode sheets, and an electrode processing apparatus for cutting, winding, and other processes on the electrode sheets.

[0156] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0157] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A coating device characterized by comprising: The application relates to a coating head and a filter assembly. The filter assembly comprises a filter pipe connected to the coating head, a pipe wall of the filter pipe being provided with a first interface and a second interface oppositely arranged along a first direction intersecting an extension direction of the filter pipe and being respectively openable and closable; an output unit connected to and in communication with the first interface, and a recovery unit connected to and in communication with the second interface; and a filter element comprising a replacement part, a filter part and a recovery part connected in sequence, the replacement part being connected to the output unit, the filter part being located in the filter pipe and used for filtering slurry in the filter pipe, and the recovery part being connected to the recovery unit, the output unit being used for conveying at least part of the replacement part to the filter pipe to replace the filter part, and the recovery unit being used for recovering the replaced filter part and forming the recovered filter part into part of the recovery part.

2. The coating apparatus according to claim 1, wherein At least part of the replacement part is wound in the output unit, and the output unit is used for unwinding the replacement part.

3. The coating apparatus according to claim 2, wherein The output unit comprises a first storage chamber used for storing the replacement part, a first communication chamber connected and in communication between the first storage chamber and the first interface, a winding-off mechanism and a first valve body installed in the first communication chamber in sequence in a direction away from the first storage chamber, the winding-off mechanism being used for unwinding the replacement part, and the first valve body being used for opening and closing the communication between the first interface and the first communication chamber.

4. The coating apparatus according to claim 3, wherein The winding-off mechanism comprises a first rotating shaft and a second rotating shaft, the first rotating shaft and the second rotating shaft being arranged in parallel and at intervals along the extension direction of the filter pipe and being respectively connected to the first communication chamber in a manner of rotating around their own axes, and the first rotating shaft and the second rotating shaft being used for clamping and conveying the replacement part.

5. The coating apparatus according to claim 4, wherein The output unit further comprises a second valve body installed in the first communication chamber, the winding-off mechanism being located between the first valve body and the second valve body, and the second valve body being used for opening and closing the communication between the first communication chamber and the first storage chamber.

6. The coating apparatus according to claim 4, wherein The winding-off mechanism further comprises a first driving element located outside the first communication chamber, the first driving element being connected to the first rotating shaft and being used for driving the first rotating shaft to rotate.

7. The coating apparatus according to claim 3, wherein The first storage chamber is open at the top and detachably provided with a first upper cover.

8. The coating apparatus according to claim 3, wherein The first storage chamber is detachably provided with a first winding shaft, and the replacement part is wound on the first winding shaft.

9. The coating apparatus of claim 1, wherein At least part of the recovery part is wound in the recovery unit, and the recovery unit is used for winding the filter part.

10. The coating apparatus of claim 9, wherein The recycling unit comprises a second storage chamber for storing the recycling part, a second communication chamber in communication with the second storage chamber and the second interface respectively, a recycling mechanism and a third valve body, the recycling mechanism and the third valve body being sequentially installed in the second communication chamber in a direction away from the second storage chamber, the recycling mechanism being used for conveying the recycling part to the second storage chamber, and the third valve body being used for opening and closing the communication between the second interface and the second communication chamber.

11. The coating apparatus of claim 10, wherein The recycling mechanism comprises a third rotating shaft and a fourth rotating shaft, the third rotating shaft and the fourth rotating shaft being parallel and spaced apart along the extension direction of the filter pipe and being connected to the second communication chamber in a manner of rotating around their own axes, the third rotating shaft and the fourth rotating shaft being used for clamping and conveying the recycling part.

12. The coating apparatus of claim 11, wherein, The output unit further comprises a fourth valve body, the fourth valve body being installed in the second communication chamber, the recycling mechanism being located between the third valve body and the fourth valve body, and the fourth valve body being used for opening and closing the communication between the second communication chamber and the second storage chamber.

13. The coating apparatus of claim 11, wherein, The recycling mechanism further comprises a second driving member located outside the second communication chamber, the second driving member being connected with the third rotating shaft and being used for driving the third rotating shaft to rotate.

14. The coating apparatus of claim 10, wherein, The second storage chamber is open at the top and detachably installed with a second upper cover.

15. The coating apparatus of claim 10, wherein, The second storage chamber is detachably installed with a second reel, the second reel being used for winding the recycling part.

16. The coating apparatus according to any one of claims 1 to 15, wherein The filter pipe is provided with a first pipe joint and a second pipe joint in communication with the inside of the filter pipe on both sides of the first direction, the first pipe joint being provided with the first interface, and the second pipe joint being provided with the second interface.

17. A battery production system characterized by comprising: A coating device comprising any one of claims 1-16. A coating device comprising any one of claims 1-16.

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