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 die head and a first cleaning mechanism, a first cavity is formed in the coating die head, and the first cavity is provided with a first connector and a second connector; the first cleaning mechanism communicates with the first connector and is detachably connected with the first connector, and is configured to communicate with the second connector and is detachably connected with the second connector. A cleaning solvent of the first cleaning mechanism can be discharged through the second connector after entering from the first connector, so that the first cavity is cleaned, and compared with the mode that the coating die head is manually disassembled for cleaning, the cleaning efficiency can be improved; in addition, the liquid inlet and outlet direction of the cleaning solvent can be changed by releasing the connection between the first cleaning mechanism and the first connector and connecting the first cleaning mechanism and the second connector, so that the washing direction is changed, and a better cleaning effect can be achieved.

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 production process of battery devices, a coating device is needed to coat the electrode sheets with slurry. During the operation of the coating device, a gel will gradually form in the cavity of the coating die head. The gel will affect the coating quality. Therefore, the coating die head needs to be cleaned regularly.

[0003] The relevant technologies usually involve manually disassembling the coating die head for cleaning, which is inefficient. Therefore, how to improve the cleaning efficiency of the coating die head 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 the cleaning efficiency of the coating die head.

[0005] In a first aspect, embodiments of this application provide a coating apparatus, including a coating die head and a first cleaning mechanism. The coating die head is provided with a first cavity and a first interface and a second interface respectively communicating with the first cavity. The first cleaning mechanism is connected to and detachably connected to the first interface, and is configured to be connected to and detachably connected to the second interface after being disconnected from the first interface. The cleaning mechanism is used to provide cleaning solvent to the first cavity.

[0006] By adopting the above technical solution, the coating die head of the coating device is designed to include a first interface and a second interface, and has a cleaning mechanism that can provide cleaning solvent to the first cavity. The cleaning solvent enters from the first interface and can be discharged through the second interface, thereby cleaning the first cavity. Compared with the method of manually disassembling the coating die head for cleaning, the cleaning efficiency can be improved. In addition, by disconnecting the first cleaning mechanism from the first interface and connecting the first cleaning mechanism to the second interface, the direction of liquid flow of the cleaning solvent can be changed, thereby changing the rinsing direction and achieving a better cleaning effect.

[0007] In some embodiments of this application, the first cleaning mechanism includes a first solvent output line and a solvent supply assembly connected and communicating with each other. The first solvent output line is detachably connected to the first interface and is configured to be detachably connected to the second interface after being disconnected from the first interface. The solvent supply assembly is used to supply cleaning solvent to the first solvent output line.

[0008] By adopting the above technical solution, the first cleaning mechanism is designed to include a first solvent output pipeline and a solvent supply component. The solvent supply component provides cleaning solvent to the first solvent output pipeline, and the cleaning solvent is output through the first solvent output pipeline. The structure is simple, and the cleaning solvent can be directly delivered into the first cavity, ensuring that the cleaning solvent can be evenly distributed and improving the cleaning efficiency.

[0009] In some embodiments of this application, the detachable connection method includes at least one of threaded connection, plug-in connection and snap-fit ​​connection.

[0010] By adopting the above technical solution, the detachable connection method is designed to include at least one of threaded connection, plug-in and snap-fit. Threaded connection, plug-in and snap-fit ​​all have the advantages of simple structure, convenient processing and convenient disassembly and assembly.

[0011] In some embodiments of this application, the first solvent output pipeline is provided with a first external thread, the first interface is provided with a first internal thread that is threadedly connected to the first external thread, and the second interface is provided with a second internal thread that is adapted to the first external thread.

[0012] By adopting the above technical solution, the first solvent output pipeline is provided with a first external thread, the first interface is provided with a first internal thread, and the second interface is provided with a second internal thread. It is only necessary to rotate the first solvent output pipeline to realize its disassembly and assembly with the first interface or the second interface, which is convenient to operate. Moreover, the internal threads on the first interface and the second interface are also convenient to process.

[0013] In some embodiments of this application, the solvent supply assembly includes a compressed air supply unit, a clean solvent supply unit, and a mixing unit. The compressed air supply unit and the clean solvent supply unit are respectively connected to and communicate with the mixing unit, and the mixing unit is connected to and communicates with the first solvent output pipeline.

[0014] Using the above technical solution, the solvent supply component is designed to include a compressed air supply unit, a cleaning solvent supply unit, and a mixing unit. The compressed air provided by the compressed air supply unit and the cleaning solvent provided by the cleaning solvent supply unit are mixed in the mixing unit and then delivered to the first solvent output pipeline. The power provided by the compressed air can enhance the impact force of the cleaning solvent, making the solvent more evenly distributed throughout the cavity, which can more effectively impact and peel off the gel in the cavity, reduce cleaning time, and improve cleaning efficiency.

[0015] In some embodiments of this application, the compressed air supply assembly includes a compressed air storage device, a compressed air supply pipeline, and a first valve body. The compressed air storage device is connected to and communicates with one end of the compressed air supply pipeline, and the other end of the compressed air supply pipeline is connected to and communicates with the mixing unit. The first valve body is connected to the compressed air supply pipeline and is used to open and close the compressed air supply pipeline.

[0016] Using the above technical solution, when cleaning the first cavity, the compressed air supply pipeline can be opened and closed through the first valve body to release the compressed air. When cleaning is not required, the compressed air supply pipeline can be closed through the first valve body to reduce the loss of compressed air in the compressed air storage device.

[0017] In some embodiments of this application, the compressed air supply unit further includes a pressure detection element connected to the compressed air supply pipeline and used to detect the pressure of the compressed air supply pipeline.

[0018] By adopting the above technical solution, the pressure of the compressed air supply pipeline can be detected by configuring a pressure detection device, thereby facilitating the control of the pressure of the compressed air supply pipeline.

[0019] In some embodiments of this application, the cleaning solvent supply unit includes a cleaning solvent supply pipeline and a pressurizing component. One end of the cleaning solvent supply pipeline is connected to and communicates with a solution storage device, and the other end is connected to and communicates with the mixing unit. The pressurizing component is connected to the cleaning solvent supply pipeline and is used to increase the solvent delivery pressure in the cleaning solvent supply pipeline.

[0020] Using the above technical solution, the cleaning solvent supply unit is designed to include a cleaning solvent supply pipeline and a pressurizing component. The pressurizing component can increase the delivery pressure of the cleaning solvent, so that the cleaning solvent and compressed air can be mixed better. Under the joint drive of the pressurizing component and compressed air, the cleaning solvent can more easily enter the first cavity through the first solvent output pipeline, and the rinsing pressure can also be increased.

[0021] In some embodiments of this application, the coating die head is provided with a second cavity and a third interface and a fourth interface respectively communicating with the second cavity. The coating device further includes a second cleaning mechanism, which is connected to and detachably connected to the third interface and configured to be connected to and detachably connected to the fourth interface. The second cleaning mechanism is used to provide cleaning solvent to the second cavity.

[0022] By adopting the above technical solution, the coating die head is provided with a second cavity. The second cavity and the first cavity jointly receive the coating slurry, which can better buffer the slurry and improve the stability of the coating slurry output. In addition, the second cleaning mechanism can clean the second cavity. Furthermore, by disconnecting the second cleaning mechanism from the third interface and connecting the second cleaning mechanism to the fourth interface, the direction of the cleaning solvent inlet and outlet can be changed, thereby changing the rinsing direction and achieving a better cleaning effect.

[0023] In some embodiments of this application, the second cleaning mechanism includes a second solvent output line, which is detachably connected to the third interface and configured to be detachably connected to the fourth interface.

[0024] By adopting the above technical solution, the second cleaning mechanism is designed to include a second solvent output pipeline, which outputs cleaning solvent. The structure is simple and can directly deliver the cleaning solvent into the second cavity, ensuring that the cleaning solvent can be evenly distributed and improving cleaning efficiency.

[0025] In some embodiments of this application, the first cleaning mechanism includes a first solvent output pipeline and a solvent supply assembly. The first solvent output pipeline is detachably connected to the first interface and configured to be detachably connected to the second interface. The first solvent output pipeline and the second solvent output pipeline are respectively connected to and communicate with the solvent supply assembly.

[0026] By adopting the above technical solution, the first solvent output pipeline and the second solvent output pipeline are respectively connected to the solvent supply component, eliminating the need to configure a solvent supply structure for the second solvent output pipeline, which simplifies the structure of the coating device and reduces costs.

[0027] In some embodiments of this application, the coating apparatus further includes a recycling mechanism, which is detachably connected to the second interface and configured to be detachably connected to the first interface. The recycling mechanism is used to recycle the cleaning solvent in the first cavity.

[0028] By adopting the above technical solution, the cleaning solvent in the first chamber can be recovered by the recycling mechanism, which reduces the pollution of the cleaning solvent and allows for the utilization of waste liquid, thus saving energy and protecting the environment.

[0029] In some embodiments of this application, the recovery mechanism includes a first solvent recovery line, which is detachably connected to the second interface and configured to be detachably connected to the first interface.

[0030] By adopting the above technical solution, the first solvent recovery pipeline is designed to be detachable from both the second interface and the first interface. After the first cleaning mechanism is disconnected from the first interface, the first solvent recovery pipeline can be easily disconnected from the second interface and then reconnected to the first interface to perform solvent recovery and cleaning operations again.

[0031] 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

[0032] 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.

[0033] Figure 1 This is a schematic diagram of the structure of the coating die head of the coating apparatus provided in some embodiments of this application;

[0034] Figure 2 This is a schematic diagram of the cleaning mechanism of the coating apparatus provided in some embodiments of this application.

[0035] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0036] 100. Coating apparatus;

[0037] 10. Coating die head; 11. First die head; 12. Second die head; 121. First cavity; 1211. First interface; 1212. Second interface; 122. Second cavity; 1221. Third interface; 1222. Fourth interface; 123. Feed inlet;

[0038] 20. First cleaning mechanism; 21. First solvent output pipeline; 211. Second valve body; 212. First flange; 22. Solvent supply assembly; 221. Compressed air supply unit; 2211. Compressed air storage unit; 2212. Compressed air supply pipeline; 2213. First valve body; 2214. Pressure detection unit; 222. Cleaning solvent supply unit; 2221. Cleaning solvent supply pipeline; 2222. Pressurization unit; 223. Mixing unit; 2231. Mixing valve;

[0039] 30. Second cleaning mechanism; 31. Second solvent output pipeline;

[0040] 40. Recycling mechanism; 41. First solvent recovery pipeline; 42. Second solvent recovery pipeline;

[0041] X, the first direction; Y, the second direction. Detailed Implementation

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0047] 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.

[0048] In this application, "multiple" means two or more (including two).

[0049] Currently, battery devices are being used more and more widely. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively 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 for them is also constantly increasing.

[0050] In the production process of battery devices, electrode coating is required. Among them, extrusion coating can control the thickness of the electrode within a wide range, and has the advantages of fast coating speed, less susceptibility to external influences, and precise control of coating weight.

[0051] During the extrusion coating process, due to the physicochemical properties of the slurry and the structure of the coating device itself, a gel will gradually form in the cavity of the coating die during operation. If the gel flows out with the slurry or blocks the die outlet, it will form dark marks or particle scratches, which will seriously affect the appearance of the electrode and even affect the consistency of the electrode coating weight, bringing serious quality and safety risks.

[0052] Currently, the common method for handling gel clogging of the die head is to shut down the coating unit, manually disassemble the die head, clean it with solvent, and then reinstall and restart the equipment for debugging. This process usually takes several hours or even more than ten hours and is not automated. It is not only time-consuming and labor-intensive, but also results in a significant loss of production capacity and a large amount of debugging waste. Moreover, it is impossible to guarantee the consistency of the gasket installation position before and after the die head is disassembled and reassembled, thus making it impossible to guarantee the stability of the electrode thinning data. It needs to be adjusted step by step during production, which further wastes time and costs.

[0053] Therefore, improving the gel cleaning efficiency of the coating die head and ensuring the consistency of the gasket installation position before and after the die head is disassembled is an important issue in battery production and processing.

[0054] In view of this, this application provides a technical solution that solves the above-mentioned technical problem by adding a first cleaning mechanism to the coating die head and providing a cleaning solvent to the first cavity of the coating die head to remove the gel.

[0055] The following is in conjunction with the appendix Figure 1 and attached Figure 2 The coating apparatus 100 provided in the embodiments of this application will be described.

[0056] Combined with appendix Figure 1 and attached Figure 2 As shown, this application provides a coating apparatus 100, including a coating die 10 and a first cleaning mechanism 20. The coating die 10 has a first cavity 121 and a first interface 1211 and a second interface 1212 respectively communicating with the first cavity 121. The first cleaning mechanism 20 is connected to the first interface 1211 and is detachably connected and configured to be able to connect to the second interface 1212 and be detachably connected after being disconnected from the first interface 1211. The cleaning mechanism is used to provide cleaning solvent to the first cavity 121.

[0057] It should be noted that the appendix of this embodiment... Figure 1 Some internal structures of the coating die 10 that are not visible from the outside (such as the first interface 1211, the second interface 1212, and the feed port 123, etc.) are shown for ease of understanding.

[0058] In some embodiments, the coating apparatus 100 may include, in addition to the coating die head 10, an unwinding mechanism and a feeding mechanism (not shown in the figure), wherein the unwinding mechanism is used to unwind the electrode sheet and the feeding mechanism is used to supply coating slurry to the coating die head 10.

[0059] The coating die 10 can be an extrusion coating die. The coating die 10 includes a first die 11, a second die 12 and a gasket (not shown in the figure). In some embodiments, the first die 11 is an upper die and the second die 12 is a lower die.

[0060] The first mold head 11 and the second mold head 12 form a coating cavity through the sealing surface. The rear end of the first mold head 11 may be connected to the second mold head 12 by a hinge, which facilitates installation and maintenance.

[0061] The second mold head 12 is provided with a main material groove and a discharge groove inside. The main material groove and the first mold head 11 enclose a first cavity 121, and the discharge groove and the first mold head 11 enclose a second cavity 122. Since the main material groove is part of the first cavity 121 and the two are in the same position, this embodiment only describes the first cavity 121 with drawings. Similarly, the relationship between the discharge groove and the second cavity 122 is also the same.

[0062] The second mold head 12 is provided with a feed port 123 for introducing slurry, and the feed port 123 can be connected to the aforementioned feeding mechanism.

[0063] A gasket (not shown in the figure) is placed between the first die head 11 and the second die head 12 to seal and adjust the gap. The gasket may have a discharge notch to form a discharge port that communicates with the discharge cavity.

[0064] Unlike the cavity structure of the coating die head 10 in related technologies, the coating die head 10 in this embodiment is designed to include a first interface 1211 and a second interface 1212 that are respectively connected to the first cavity 121. In some embodiments, the first interface 1211 and the second interface 1212 may be located at both ends of the coating die head 10 along the first direction X in the figure. The first direction X may be the length direction of the second die head 12.

[0065] It should be noted that the "mouth" in the first interface 1211 and the second interface 1212 in this embodiment should be interpreted in a broad sense. It can refer to an opening or a hole. For example, the first interface 1211 and the second interface 1212 are both through-hole structures extending along the first direction X.

[0066] Furthermore, the coating apparatus 100 in this embodiment is provided with a first cleaning mechanism 20. The first cleaning mechanism 20 is detachably connected to the first interface 1211, which means that the first cleaning mechanism 20 and the first interface 1211 can be removed after installation, and the original structure of the first interface 1211 and the first cleaning mechanism 20 will not be damaged after removal. The same applies to the detachable connection between the first cleaning mechanism 20 and the second interface 1212.

[0067] When the first cleaning mechanism 20 is connected to the first interface 1211, the first cleaning mechanism 20 delivers cleaning solvent to the first cavity 121 through the first interface 1211. The cleaning solvent flows in the direction from the first interface 1211 to the second interface 1212. During the cleaning process, the color and state of the solvent discharged from the coating die 10 can be observed at any time. If the solvent remains clear, it indicates that the gel in the first cavity 121 has been basically removed, and the cleaning work is basically completed. If the discharged solvent is still turbid, it indicates that the cleaning is not thorough, and it is necessary to continue to supply solvent for cleaning until the discharged solvent is clear.

[0068] However, during the cleaning process, some gel in the first cavity 121 still cannot be completely removed. Therefore, the connection between the first cleaning mechanism 20 and the first interface 1211 can be disconnected, and the first cleaning mechanism 20 can be connected and communicated with the second interface 1212, so that the cleaning solvent flows along the direction from the second interface 1212 to the first interface 1211, which can better remove some dead corners and thus improve the cleaning effect.

[0069] Cleaning solvents refer to solvent materials that can be dissolved in the coating slurry. Therefore, in addition to rinsing, the gel formed after the coating slurry has cured also needs to be dissolved in order to be completely removed.

[0070] The cleaning agent should be selected according to the different coating materials. For example, the cleaning solvent for the coating slurry of the cathode electrode can be ethanol or N-methylpyrrolidone (NMP), while the cleaning solvent for the coating slurry of the anode electrode can be ethanol or ultrapure water.

[0071] As can be seen from the above description, in this embodiment, the cleaning solvent enters through the first interface 1211 and is discharged through the second interface 1212 by the first cleaning mechanism 20, thereby cleaning the first cavity 121. Compared with the method of manually disassembling the coating die head 10 for cleaning, the cleaning efficiency can be improved. In addition, by disconnecting the first cleaning mechanism 20 from the first interface 1211 and connecting the first cleaning mechanism 20 to the second interface 1212, the direction of the cleaning solvent entering and exiting can be changed, thereby changing the rinsing direction and achieving a better cleaning effect.

[0072] In some examples, the first cleaning mechanism 20 may optionally include a first solvent output line 21 and a solvent supply assembly 22 connected and in communication with each other. The first solvent output line 21 is detachably connected to a first interface 1211 and configured to be detachably connected to a second interface 1212. The solvent supply assembly 22 is used to supply cleaning solvent to the first solvent output line 21.

[0073] One end of the first solvent output pipeline 21 is detachably connected to the first interface 1211, and the other end is connected to and communicates with the solvent supply component 22. The connection between the first solvent output pipeline 21 and the solvent supply component 22 can be direct or indirect, and it is necessary to ensure that the two can communicate.

[0074] The first solvent output pipe 21 can be a flexible pipe or a rigid pipe, and its material can be any pipe material that does not react with the coating slurry. For example, the material of the first solvent output pipe 21 can include non-metallic parts such as plastic, or metallic parts such as stainless steel.

[0075] The first solvent output pipe 21 allows for the direct, directional delivery of cleaning solvent into the first cavity 121, ensuring uniform solvent distribution and improving cleaning efficiency. Furthermore, the interface of the first solvent output pipe 21 facilitates connection to either the first interface 1211 or the second interface 1212, and also allows for easy connection to the solvent supply assembly 22. In addition, the first solvent output pipe 21 can be adjusted in terms of flow rate and pressure to meet different cleaning requirements.

[0076] In some embodiments, a second valve body 211 may be configured on the first solvent output line 21 to facilitate control of the amount of cleaning solvent used.

[0077] In some embodiments, a first flange 212 may be provided at one end of the first solvent output pipeline 21 to facilitate connection of the solvent supply assembly 22.

[0078] Of course, in addition to using the first solvent output pipe 21 to connect to the first interface 1211, the first interface 1211 can also be connected by configuring an interface on the first cleaning mechanism 20 (this embodiment is not shown in the figure).

[0079] In this embodiment, the first cleaning mechanism 20 is designed to include a first solvent output pipe 21 and a solvent supply component 22. The solvent supply component 22 provides cleaning solvent to the first solvent output pipe 21. The cleaning solvent is output through the first solvent output pipe 21. The structure is simple and can directly deliver the cleaning solvent into the first cavity 121, ensuring that the cleaning solvent can be evenly distributed and improving the cleaning efficiency.

[0080] In some examples, the detachable connection may optionally include at least one of threaded connection, plug-in and snap-fit.

[0081] A threaded connection is a fastening of two components through the mechanical engagement of threads. The installation and disassembly of a threaded connection are simple.

[0082] The threaded connection between the first solvent output pipe 21 and the first interface 1211 can include two implementation methods: one is that the first solvent output pipe 21 is connected to the first interface 1211 by bolts, and the other is that the first solvent output pipe 21 is provided with one of internal threads and external threads, and the first interface 1211 is provided with the other of internal threads and external threads.

[0083] The connection between the first solvent output pipe 21 and the first interface 1211 (this embodiment is not shown in the figure) refers to the insertion of one of the first solvent output pipe 21 and the first interface 1211 into the other. It can be that the first solvent output pipe 21 is provided with a plug and the first interface 1211 is a socket, or the first solvent output pipe 21 is provided with a socket and the first interface 1211 is a plug.

[0084] The installation and removal process of plug-in connections is very quick, usually taking only a few seconds. Plug-in connections typically have good sealing and vibration resistance, making them suitable for high-frequency connection and disconnection operations.

[0085] The snap-fit ​​connection between the first solvent output pipe 21 and the first interface 1211 (this embodiment is not shown in the figure) refers to one of them having a buckle and the other having a slot that engages with the buckle. The snap-fit ​​connection can also enable quick assembly and disassembly of the first solvent output pipe 21 and the first interface 1211.

[0086] Similarly, the connection between the first solvent output pipe 21 and the second interface 1212 can also be the threaded connection, plug-in connection or snap-fit ​​connection described above, which will not be elaborated in this embodiment.

[0087] The detachable connection method is designed to include at least one of threaded connection, plug-in and snap-fit, which has the advantages of simple structure, convenient processing and easy disassembly and assembly.

[0088] In some examples, optionally, the first solvent output line 21 is provided with a first external thread (not shown in the figure), the first interface 1211 is provided with a first internal thread (not shown in the figure) that is threadedly connected to the first external thread, and the second interface 1212 is provided with a second internal thread (not shown in the figure) that is adapted to the first external thread.

[0089] The first interface 1211 and the second interface 1212 are open or through-hole structures. Compared with setting external threads on them, it is more convenient to set internal threads on the first interface 1211 and the second interface 1212 respectively. Therefore, in this embodiment, the first interface 1211 is provided with a first internal thread and the second interface 1212 is provided with a second internal thread. The inner diameter of the first interface 1211 and the second interface 1212 are equal, and the thread pitch of the first internal thread and the second internal thread are equal.

[0090] Accordingly, in this embodiment, a first external thread is formed on the outer wall of the first solvent output pipe 21. The first external thread can be threadedly connected to the first internal thread and the second internal thread mentioned above. It is only necessary to rotate the first solvent output pipe 21 to realize its disassembly and assembly with the first interface 1211 or the second interface 1212. The operation is convenient. Moreover, it is also convenient to process the internal threads in the first interface 1211 and the second interface 1212.

[0091] Combined with appendix Figure 2 As shown, in some instances, the solvent supply assembly 22 may optionally include a compressed air supply unit 221, a clean solvent supply unit 222, and a mixing unit 223. The compressed air supply unit 221 and the clean solvent supply unit 222 are respectively connected to and communicate with the mixing unit 223, and the mixing unit 223 is connected to and communicates with the first solvent output pipeline 21.

[0092] The compressed air supply unit 221 can be any structure capable of providing compressed air, such as an air compressor (piston, screw, centrifugal, etc.), a compressed air generator, a compressed air storage tank, etc. This embodiment will not list them all.

[0093] The compressed air supply unit 221 and the mixing unit 223 can be connected by a pipeline or directly. The mixing unit 223 may include a mixing valve 2231.

[0094] The mixing valve 2231 is a device that can mix compressed air and cleaning solvent and deliver the mixture to the first solvent output line 21.

[0095] In some embodiments, the mixing valve 2231 may include a valve body, a valve core, a nozzle, an actuator (not shown), and other structures. The valve body has a mixing chamber with an air inlet and a liquid inlet. The air inlet is connected to the compressed air supply unit 221, and the liquid inlet is connected to the cleaning solvent supply unit 222. The mixing chamber can be designed to promote thorough mixing of the two fluids, such as a spiral or other complex geometric shape, to ensure uniform mixing of the fluids. The valve core is located within the valve body and is moved by the actuator. By adjusting its position or angle, the valve core can change the flow ratio of compressed air and cleaning solvent. The nozzle is connected to the mixing chamber and is used to deliver the mixed cleaning solvent to the first solvent output line 21.

[0096] During the cleaning of the first cavity 121, the compressed air supplied by the compressed air supply unit 221 and the cleaning solvent supplied by the cleaning solvent supply unit 222 are mixed in the mixing unit 223 and then delivered to the first solvent output pipeline 21. The power provided by the compressed air can enhance the impact force of the cleaning solvent, making the solvent more evenly distributed throughout the cavity, which can more effectively impact and peel off the gel in the cavity, reduce cleaning time, and improve cleaning efficiency.

[0097] In some examples, the compressed air supply assembly optionally includes a compressed air storage unit 2211, a compressed air supply line 2212, and a first valve body 2213. The compressed air storage unit 2211 is connected to and communicates with one end of the compressed air supply line 2212, and the other end of the compressed air supply line 2212 is connected to and communicates with the mixing unit 223. The first valve body 2213 is connected to the compressed air supply line 2212 and is used to open and close the compressed air supply line 2212.

[0098] The compressed air storage unit 2211 can be the compressed air storage tank mentioned above. The compressed air storage unit 2211 is connected to the mixing valve 2231 through the compressed air supply pipeline 2212.

[0099] The first valve body 2213 can be any type of valve body structure that can open and close the compressed air supply pipeline 2212, such as a solenoid valve, a ball valve, etc. This embodiment will not list them all.

[0100] The compressed air storage unit 2211 can have its own switch, or it can be indirectly switched on and off by directly opening and closing the compressed air supply pipeline 2212 through the first valve body 2213.

[0101] When cleaning the first chamber 121, the compressed air supply line 2212 can be opened and closed through the first valve body 2213 to release compressed air. When cleaning is not required, the compressed air supply line 2212 can be closed through the first valve body 2213 to reduce the loss of compressed air in the compressed air storage device 2211.

[0102] In some examples, the compressed air supply unit 221 may optionally include a pressure sensor 2214 connected to the compressed air supply line 2212 and used to detect the pressure of the compressed air supply line 2212.

[0103] In some embodiments, the pressure sensing element 2214 may be a pressure gauge, which can directly detect and display the gas pressure in the compressed air supply line 2212.

[0104] Of course, the pressure can also be a pressure sensor installed inside the pipeline, such as a piezoresistive pressure sensor, a capacitive pressure sensor, a fiber optic pressure sensor, a piezoelectric pressure sensor, etc. The pressure sensor can be directly or indirectly connected to a display structure (not shown in the figure).

[0105] By configuring the pressure detection element 2214, the pressure of the compressed air supply line 2212 can be detected, which makes it convenient for the operator or the control circuit of the coating device 100 to know the pressure of the compressed air supply line 2212, thereby facilitating the control of the pressure of the compressed air supply line 2212.

[0106] In some examples, the cleaning solvent supply unit 222 may optionally include a cleaning solvent supply line 2221 and a pressurizing element 2222. One end of the cleaning solvent supply line 2221 is connected to and communicates with a solution storage device, and the other end is connected to and communicates with a mixing unit 223. The pressurizing element 2222 is connected to the cleaning solvent supply line 2221 and is used to increase the solvent delivery pressure in the cleaning solvent supply line 2221.

[0107] The materials of the cleaning solvent supply line 2221, the compressed air supply line 2212, and the aforementioned cleaning solvent output line can be the same or similar, such as plastic or metal.

[0108] One end of the cleaning solvent supply line 2221 is used to connect to a solution storage device (not shown in the figure). The solution storage device can be any structure capable of storing cleaning solvent, such as a tank, a box, etc. The solution storage device can be regarded as part of the cleaning solvent supply unit 222, or independent of the coating device 100 in this embodiment.

[0109] The other end of the cleaning solvent supply line 2221 is used to connect and communicate with the inlet of the mixing valve 2231. The cleaning solvent supply line 2221 can be connected to the solution storage device and the mixing valve 2231 through flanges or pipe fittings, etc. This embodiment does not impose too many limitations on this.

[0110] The booster component 2222 can be a booster pump, which can increase the solvent delivery pressure in the cleaning solvent supply line 2221. This not only makes it easier for the cleaning solvent supply line 2221 to draw the cleaning solvent from the solution storage device, but also facilitates the delivery of the cleaning solvent to the mixing valve 2231.

[0111] Of course, in addition to booster pumps, the booster component 2222 in this embodiment can also be a pump body structure that can increase pipeline pressure, such as a hydraulic pump, centrifugal pump, and screw pump. This embodiment will not list them all.

[0112] The cleaning solvent supply unit 222 is designed to include a cleaning solvent supply pipeline 2221 and a pressurizing component 2222. The pressurizing component 2222 can increase the delivery pressure of the cleaning solvent, so that the cleaning solvent and compressed air can be mixed better. Under the joint drive of the pressurizing component 2222 and compressed air, the cleaning solvent can more easily enter the first cavity 121 through the first solvent output pipeline 21, and the rinsing pressure can also be increased.

[0113] Combined again with the appendix Figure 1 As shown, in some examples, optionally, the coating die 10 is provided with a second cavity 122 and a third interface 1221 and a fourth interface 1222 respectively communicating with the second cavity 122. The coating apparatus 100 also includes a second cleaning mechanism 30, which is connected to and detachably connected to the third interface 1221 and configured to be connected to and detachably connected to the fourth interface 1222. The second cleaning mechanism 30 is used to provide cleaning solvent to the second cavity 122.

[0114] The coating die head 10 is provided with a second cavity 122. The second cavity 122 and the first cavity 121 jointly receive the coating slurry, which can better buffer the slurry and improve the stability of the coating slurry output.

[0115] The second cavity 122 is not connected to the first cavity 121 mentioned above. The second cavity 122 of this embodiment can be formed by the cooperation of the discharge groove and the first die head 11.

[0116] The length direction of the second cavity 122 is also set along the first direction X in the figure, and the first cavity 121 and the second cavity 122 are spaced apart along the second direction Y in the figure. The second direction Y intersects the first direction X. In some embodiments, the second direction Y is perpendicular to the first direction X. The second direction Y is the width direction of the second mold head 12.

[0117] In order to clean the slurry gel present in the second cavity 122, the coating device 100 of this embodiment is equipped with a second cleaning mechanism 30. The second cleaning mechanism 30 is connected to and detachably connected to the third interface 1221, and is configured to be connected to and detachably connected to the fourth interface 1222. The detachable connection can be the above-mentioned plug-in connection, threaded connection, snap-fit ​​connection, etc., which will not be described in detail in this embodiment.

[0118] The second cleaning mechanism 30 can clean the second cavity 122. Furthermore, by disconnecting the second cleaning mechanism 30 from the third interface 1221 and connecting the second cleaning mechanism 30 to the fourth interface 1222, the direction of the cleaning solvent entering and exiting can be changed, thereby changing the rinsing direction and achieving a better cleaning effect.

[0119] In some examples, the second cleaning mechanism 30 may optionally include a second solvent output line 31, which is detachably connected to a third interface 1221 and configured to be detachably connected to a fourth interface 1222.

[0120] The second solvent output pipe 31 has the same or similar structure as the first solvent output pipe 21 mentioned above. The second solvent output pipe 31 can be a flexible pipe or a rigid pipe, and its material can be non-metallic parts such as plastic or metal parts such as stainless steel.

[0121] The cleaning solvent can be directly and directionally delivered into the second cavity 122 through the second solvent output pipe 31, ensuring uniform distribution of the cleaning solvent and improving cleaning efficiency. Furthermore, the interface of the second solvent output pipe 31 is convenient for connection to the third interface 1221 or the fourth interface 1222.

[0122] In some examples, the first cleaning mechanism 20 may optionally include a first solvent output line 21 and a solvent supply assembly 22, the first solvent output line 21 being detachably connected to a first interface 1211 and configured to be detachably connected to a second interface 1212, and the first solvent output line 21 and the second solvent output line 31 being connected to and in communication with the solvent supply assembly 22, respectively.

[0123] The structural forms of the first solvent output pipeline 21 and the solvent supply assembly 22 have been given above, and will not be described again in this embodiment.

[0124] The first solvent output pipe 21 and the second solvent output pipe 31 are designed to be connected and communicated with the solvent supply component 22, respectively. Specifically, the first solvent output pipe 21 and the second solvent output pipe 31 can be connected and communicated with the above-mentioned mixing valve 2231 through pipes, so that the first solvent output pipe 21, the second solvent output pipe 31 and the above-mentioned solvent supply component 22 together form an integrated cleaning system.

[0125] This design can provide cleaning solvent to the first solvent output line 21 and the second solvent output line 31 through a solvent supply component 22, without the need to configure a separate solvent supply structure for the second solvent output line 31, which can simplify the structure of the coating device 100 and reduce costs.

[0126] In some examples, the coating apparatus 100 may optionally include a recovery mechanism 40, which is detachably connected to the second interface 1212 and configured to be detachably connected to the first interface 1211. The recovery mechanism 40 is used to recover the cleaning solvent in the first chamber 121.

[0127] The recycling mechanism 40 can be any recycling structure that can be selectively and detachably connected to the first interface 1211 and the second interface 1212. The detachable connection forms of the recycling mechanism 40 to the first interface 1211 and the second interface 1212 can be the plug-in, snap-fit, or threaded connection mentioned above.

[0128] The first cleaning mechanism 20 delivers cleaning solvent to the first chamber through the first interface 1211. The cleaning solvent flushes and carries away the gel along the direction from the first interface 1211 to the second interface 1212. Then, it enters the recycling mechanism 40 of this embodiment through the first cleaning mechanism 20. The recycling mechanism 40 is used to recycle the cleaning solvent in the first chamber 121, which reduces cleaning solvent pollution and allows for waste liquid utilization, thus saving energy and protecting the environment.

[0129] In some examples, the recovery mechanism 40 may optionally include a first solvent recovery line 41, which is detachably connected to a second interface 1212 and configured to be detachably connected to a first interface 1211.

[0130] The first solvent recovery pipeline 41 is designed to be detachable from the second interface 1212 and the first interface 1211 respectively. After the first cleaning mechanism 20 is disconnected from the first interface 1211, the first solvent recovery pipeline 41 can be easily disconnected from the second interface 1212 and the first solvent recovery pipeline 41 can be connected to the first interface 1211 to perform solvent recovery and cleaning operations again.

[0131] The first solvent recovery pipeline 41 has the same or similar structure as the aforementioned first solvent output pipeline 21. When it is necessary to change the direction of the cleaning solvent flow, the first solvent output pipeline 21 can be disconnected from the first interface 1211, and the first solvent recovery pipeline 41 can be disconnected from the second interface 1212. Then, the first solvent output pipeline 21 is connected to the second interface 1212, and the first solvent recovery pipeline 41 is connected to the first interface 1211, thereby realizing the reversal of the cleaning solvent rinsing direction.

[0132] In some embodiments, the recycling mechanism 40 may further include a recycling storage structure (not shown in the figure), wherein a first solvent recycling pipeline 41 is connected to and communicates with the recycling storage structure, and the cleaning waste liquid collected by the first solvent recycling pipeline 41 can enter the recycling storage structure for storage or await subsequent processing.

[0133] When the coating die head 10 also includes the second cavity 122 mentioned above, the recovery mechanism 40 may also include a second solvent recovery pipeline 42. The second solvent recovery pipeline 42 is detachably connected to the fourth interface 1222 and is configured to be detachably connected to the third interface 1221. The connection between the second solvent recovery pipeline 42 and the fourth interface 1222 can be removed as needed, and the second solvent recovery pipeline 42 can be connected to the third interface 1221 to change the rinsing direction of the cleaning solvent in the second cavity 122.

[0134] The second solvent recovery pipeline 42 can also be connected to and communicate with the above-mentioned recovery storage structure, or it can be connected to other storage structures independently.

[0135] Secondly, embodiments of this application provide a battery production system, including the coating apparatus 100 as described above. Furthermore, the battery production system may also include a slurry production apparatus and a drying apparatus. The slurry production apparatus is used to produce coating slurry and supply the coating slurry to the coating apparatus 100, and the drying apparatus is used to dry the coated electrode sheets.

[0136] 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.

[0137] Combined with appendix Figure 1 and attached Figure 2As shown in the illustration, this application provides a coating apparatus 100, including a coating die 10 and a first cleaning mechanism 20. The coating die 10 has a first cavity 121 and a first interface 1211 and a second interface 1212 respectively communicating with the first cavity 121. The first cleaning mechanism 20 is connected to and detachably connected to the first interface 1211 and is configured to be detachably connected to the second interface 1212 after being disconnected from the first interface 1211. The cleaning mechanism is used to provide cleaning solvent to the first cavity 121. The first cleaning mechanism 20 includes a first solvent output pipe 21 and a solvent supply assembly 22 connected and communicating with each other. The first solvent output pipe 21 is detachably connected to the first interface 1211 and is configured to be detachably connected to the second interface 1212. The solvent supply assembly 22 is used to supply cleaning solvent to the first solvent output pipe 21. The detachable connection method includes at least one of threaded connection, plug-in connection, and snap-fit ​​connection. The first solvent output pipeline 21 is provided with a first external thread, the first interface 1211 is provided with a first internal thread that is threadedly connected to the first external thread, and the second interface 1212 is provided with a second internal thread that is adapted to the first external thread. The solvent supply assembly 22 includes a compressed air supply unit 221, a clean solvent supply unit 222, and a mixing unit 223. The compressed air supply unit 221 and the clean solvent supply unit 222 are respectively connected to and communicate with the mixing unit 223, and the mixing unit 223 is connected to and communicates with the first solvent output pipeline 21. The compressed air supply assembly includes a compressed air storage component 2211, a compressed air supply pipeline 2212, and a first valve body 2213. The compressed air storage component 2211 is connected to and communicates with one end of the compressed air supply pipeline 2212, and the other end of the compressed air supply pipeline 2212 is connected to and communicates with the mixing unit 223. The first valve body 2213 is connected to the compressed air supply pipeline 2212 and is used to open and close the compressed air supply pipeline 2212. The compressed air supply unit 221 also includes a pressure detection element 2214, which is connected to the compressed air supply line 2212 and used to detect the pressure of the compressed air supply line 2212. The cleaning solvent supply unit 222 includes a cleaning solvent supply line 2221 and a pressurizing element 2222. One end of the cleaning solvent supply line 2221 is connected to and communicates with a solution storage device, and the other end is connected to and communicates with a mixing unit 223. The pressurizing element 2222 is connected to the cleaning solvent supply line 2221 and is used to increase the solvent delivery pressure in the cleaning solvent supply line 2221. The coating die head 10 is provided with a second cavity 122 and a third interface 1221 and a fourth interface 1222 respectively communicating with the second cavity 122. The coating device 100 also includes a second cleaning mechanism 30, which is connected to and detachably connected to the third interface 1221, and is configured to be connected to and detachably connected to the fourth interface 1222. The second cleaning mechanism 30 is used to provide cleaning solvent to the second cavity 122.The second cleaning mechanism 30 includes a second solvent output pipe 31, which is detachably connected to a third interface 1221 and configured to be detachably connected to a fourth interface 1222. The first cleaning mechanism 20 includes a first solvent output pipe 21 and a solvent supply assembly 22. The first solvent output pipe 21 is detachably connected to a first interface 1211 and configured to be detachably connected to a second interface 1212. The first solvent output pipe 21 and the second solvent output pipe 31 are respectively connected to and communicate with the solvent supply assembly 22. The coating apparatus 100 also includes a recovery mechanism 40, which is detachably connected to the second interface 1212 and configured to be detachably connected to the first interface 1211. The recovery mechanism 40 is used to recover the cleaning solvent in the first chamber 121. The recovery mechanism 40 includes a first solvent recovery pipe 41, which is detachably connected to the second interface 1212 and configured to be detachably connected to the first interface 1211.

[0138] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0139] 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 apparatus, characterized in that, include: The coating die head is provided with a first cavity and a first interface and a second interface respectively communicating with the first cavity; A first cleaning mechanism is connected to and detachably connected to the first interface, and is configured to be connected to and detachably connected to the second interface after being disconnected from the first interface. The cleaning mechanism is used to provide cleaning solvent to the first cavity.

2. The coating apparatus according to claim 1, characterized in that, The first cleaning mechanism includes a first solvent output line and a solvent supply assembly connected and communicating with each other. The first solvent output line is detachably connected to the first interface and is configured to be detachably connected to the second interface after being disconnected from the first interface. The solvent supply assembly is used to supply cleaning solvent to the first solvent output line.

3. The coating apparatus according to claim 2, characterized in that, The detachable connection method includes at least one of threaded connection, plug-in connection and snap-fit ​​connection.

4. The coating apparatus according to claim 3, characterized in that, The first solvent output pipeline is provided with a first external thread, the first interface is provided with a first internal thread that is threadedly connected to the first external thread, and the second interface is provided with a second internal thread that is adapted to the first external thread.

5. The coating apparatus according to claim 2, characterized in that, The solvent supply assembly includes a compressed air supply unit, a clean solvent supply unit, and a mixing unit. The compressed air supply unit and the clean solvent supply unit are respectively connected to and communicate with the mixing unit, and the mixing unit is connected to and communicates with the first solvent output pipeline.

6. The coating apparatus according to claim 5, characterized in that, The compressed air supply assembly includes a compressed air storage unit, a compressed air supply pipeline, and a first valve body. The compressed air storage unit is connected to and communicates with one end of the compressed air supply pipeline, and the other end of the compressed air supply pipeline is connected to and communicates with the mixing unit. The first valve body is connected to the compressed air supply pipeline and is used to open and close the compressed air supply pipeline.

7. The coating apparatus according to claim 6, characterized in that, The compressed air supply unit also includes a pressure detection element, which is connected to the compressed air supply pipeline and is used to detect the pressure of the compressed air supply pipeline.

8. The coating apparatus according to claim 5, characterized in that, The cleaning solvent supply unit includes a cleaning solvent supply pipeline and a pressurizing component. One end of the cleaning solvent supply pipeline is connected to and communicates with a solution storage device, and the other end is connected to and communicates with the mixing unit. The pressurizing component is connected to the cleaning solvent supply pipeline and is used to increase the solvent delivery pressure in the cleaning solvent supply pipeline.

9. The coating apparatus according to claim 1, characterized in that, The coating die head is provided with a second cavity and a third interface and a fourth interface respectively communicating with the second cavity. The coating device also includes a second cleaning mechanism. The second cleaning mechanism is connected to and detachably connected to the third interface, and is configured to be connected to and detachably connected to the fourth interface. The second cleaning mechanism is used to provide cleaning solvent to the second cavity.

10. The coating apparatus according to claim 9, characterized in that, The second cleaning mechanism includes a second solvent output line, which is detachably connected to the third interface and configured to be detachably connected to the fourth interface.

11. The coating apparatus according to claim 10, characterized in that, The first cleaning mechanism includes a first solvent output pipeline and a solvent supply assembly. The first solvent output pipeline is detachably connected to the first interface and is configured to be detachably connected to the second interface. The first solvent output pipeline and the second solvent output pipeline are respectively connected to and communicate with the solvent supply assembly.

12. The coating apparatus according to any one of claims 1-11, characterized in that, The coating apparatus further includes a recycling mechanism, which is detachably connected to the second interface and configured to be detachably connected to the first interface. The recycling mechanism is used to recycle the cleaning solvent in the first cavity.

13. The coating apparatus according to claim 12, characterized in that, The recovery mechanism includes a first solvent recovery pipeline, which is detachably connected to the second interface and configured to be detachably connected to the first interface.

14. A battery production system, characterized in that, Includes the coating apparatus as described in any one of claims 1-13.

Images