Coating structure, coating equipment and battery production system
By setting an outlet channel structure with spaced coating cavities and staggered connecting plates on the coating die head, the problem of low coating efficiency is solved, and efficient coating of different areas on the current collector is achieved, reducing the cost of the battery production system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-04-07
AI Technical Summary
In existing technologies, the coating operation time is long and the coating efficiency is low. In particular, when different slurries are coated on different areas of the current collector, multiple adjustments and drying are required, resulting in low efficiency.
At least two spaced coating cavities are set on the coating die head, and a discharge channel is formed by a gasket. Adjacent connecting plates are staggered vertically to shorten the distance between the discharge ports, so as to achieve simultaneous coating of different slurries.
By shortening the coating area distance and simplifying operations, coating efficiency is improved, coating time is reduced, and the cost of the battery production system is lowered.
Smart Images
Figure CN224087158U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery manufacturing technology, and in particular to a coating structure, coating equipment and battery manufacturing system. Background Technology
[0002] Electrode coating is one of the core processes in battery cell manufacturing. Electrode coating refers to coating positive and negative electrode slurries onto the current collector to form positive and negative electrode sheets.
[0003] In existing technologies, a coating device is typically used to coat the slurry onto the current collector. When different slurries need to be coated onto different areas of the current collector, it is usually necessary to first coat one area of the current collector with the corresponding slurry using a coating device, and after the slurry in that area dries, then coat another area of the current collector with the corresponding slurry using another coating device, and so on, to complete the coating of different slurries onto multiple areas of the current collector.
[0004] However, the above coating operation takes a long time and has low coating efficiency. Utility Model Content
[0005] This application provides a coating structure, coating equipment, and battery production system to solve the problems of long coating operation time and low coating efficiency in the prior art.
[0006] In a first aspect, this application provides a coating structure comprising:
[0007] A coating die head having at least two spaced-apart coating cavities for supplying coating slurry flow;
[0008] A gasket is located inside the coating die head. The gasket includes at least two connecting plates. Two adjacent connecting plates are staggered vertically. A discharge channel is formed between the connecting plates and the coating die head. One end of the discharge channel is connected to the coating die cavity, and the other end of the discharge channel has a discharge port for the coating slurry to flow out.
[0009] In some possible implementations, the connecting plate has a guide surface on the side near the outlet, the guide surface being used to guide a portion of the coating slurry in the outlet to flow toward the side away from the outlet, and the guide surfaces of two adjacent connecting plates overlap vertically.
[0010] In some possible implementations, the guide surface is a chamfer provided on the connecting plate.
[0011] In some possible implementations, the guide surface is an arc surface.
[0012] In some possible implementations, at least one of the connecting plates includes a first mounting portion and a second mounting portion, with a portion of the first mounting portion inserted into the second mounting portion, and the first mounting portion being movable relative to the second mounting portion to adjust the width of the discharge channel.
[0013] In some possible implementations, at least one flow restrictor is also included, which is disposed on the side of the connecting plate facing the discharge channel.
[0014] In some possible implementations, the height of the flow restrictor is less than the height of the connecting plate.
[0015] In some possible implementations, the flow restrictor has a flow guide for guiding a portion of the coating slurry within the discharge channel toward a side away from the interior of the discharge channel.
[0016] In some possible implementations, the flow guide includes an arc-shaped flow guide surface.
[0017] In some possible implementations, the coating die head includes a first module and a second module, and the coating cavity is located on at least one of the first module and the second module;
[0018] The gasket is located between the first module and the second module, one side of the connecting plate abuts against one of the first module and the second module, and the other side of the connecting plate forms the discharge channel with the other of the first module and the second module.
[0019] In some possible implementations, the first module has at least two coating cavities, the second module has at least two coating cavities, and the coating cavities on the first module and the coating cavities on the second module are opposite each other.
[0020] In some possible implementations, the gasket further includes a mounting member connected to the side of the connecting plate away from the discharge port, with opposite sides of the mounting member abutting against the first module and the second module.
[0021] In some possible implementations, the gasket further includes two limiting members connected to the mounting member, with opposite sides of the limiting members abutting against the first module and the second module respectively;
[0022] Each of the connecting plates is disposed between the two limiting members.
[0023] In some possible implementations, at least two feeding components are also included, which are correspondingly connected to the coating mold cavity and are used to transport the coating slurry into the coating mold cavity.
[0024] Secondly, this application provides a coating apparatus, comprising: an apparatus body and any of the coating structures described in the first aspect above disposed on the apparatus body.
[0025] Thirdly, this application provides a battery production system, including: a slurry storage structure and any of the above-mentioned coating equipment, wherein the slurry storage structure is used to provide coating slurry to the coating equipment.
[0026] This application discloses a coating structure, coating equipment, and battery production system. The coating structure includes at least two coating cavities on a coating die head for the flow of coating slurry. A gasket, comprising at least two connecting plates, is used. Adjacent connecting plates are staggered vertically to form a discharge channel between the connecting plates and the coating die head. One end of the discharge channel is connected to a corresponding coating cavity, and the other end has a discharge port. Furthermore, the staggered vertical arrangement of adjacent connecting plates, compared to the sequentially spaced discharge ports in existing technologies, shortens the distance between adjacent discharge ports, thereby reducing the distance between the corresponding coating areas on the current collector for adjacent discharge ports. Therefore, different coating slurries can be set in each coating mold cavity. The coating slurries can flow out sequentially through the discharge channels and discharge ports corresponding to the coating mold cavities. In this way, different coating slurries can be coated on the current collector at the same time through each discharge port, realizing the partitioned coating of different slurries on the current collector. Moreover, the distance between two adjacent coating areas on the current collector is small, the coating operation is relatively simple, the time required to coat different slurries on the current collector is reduced, and the coating efficiency of the coating slurry is improved. Attached Figure Description
[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0028] Figure 1 This is a schematic diagram of the coating structure provided in the embodiments of this application;
[0029] Figure 2 for Figure 1 A structural diagram of the first module, the second module, and the material conveying component;
[0030] Figure 3 for Figure 1 Schematic diagram of the structure of the middle gasket;
[0031] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.
[0032] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments.
[0033] Explanation of reference numerals in the attached figures:
[0034] 100 - Coating die head; 101 - Coating die cavity; 102 - Discharge channel; 103 - Discharge port; 110 - First module; 120 - Second module;
[0035] 200 - Flow limiting component; 210 - Flow guiding component;
[0036] 300 - Gasket; 310 - Connecting plate; 311 - Guide surface; 312 - First mounting part; 313 - Second mounting part; 320 - Mounting component; 330 - Limiting component;
[0037] 400 - Material conveyor. Detailed Implementation
[0038] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0039] In existing technologies, a coating device is typically used to coat the current collector with slurry. The coating device includes a slurry storage tank and a die head. The slurry storage tank is connected to the die head, which supplies slurry to the die head, which then coats the current collector with the slurry. When different slurries need to be coated on different areas of the current collector, it is usually necessary to first coat one area with the corresponding slurry using the coating device, and after the slurry in that area dries, another coating device is used to coat another area with the same slurry, and this process is repeated to complete the coating of multiple areas of the current collector. However, when different slurries need to be coated on different areas of the current collector, the above coating operation is time-consuming, and after each coating, the position of the coating device needs to be accurately adjusted to ensure that the coating device can accurately coat the required areas with slurry, resulting in low coating efficiency. Alternatively, the coating apparatus may include multiple coating dies and a baking system, with the baking system positioned between two adjacent coating dies. Each coating die applies a different slurry to the current collector, and the baking system dries the slurry on the current collector. However, the aforementioned coating apparatus is more complex in structure and more expensive.
[0040] Based on this, embodiments of this application provide a coating structure with at least two coating cavities on a coating die head for the flow of coating slurry. A gasket, comprising at least two connecting plates, is provided, with adjacent connecting plates staggered vertically to form a discharge channel between the connecting plates and the coating die head. One end of the discharge channel is connected to a corresponding coating cavity, and the other end has a discharge port. Furthermore, the staggered vertical arrangement of adjacent connecting plates, compared to the prior art where discharge ports are sequentially spaced, shortens the distance between adjacent discharge ports, thereby reducing the distance between the corresponding coating areas on the collector for adjacent discharge ports. Therefore, different coating slurries can be set in each coating mold cavity. The coating slurries can flow out sequentially through the discharge channels and discharge ports corresponding to the coating mold cavities. In this way, different coating slurries can be coated on the current collector at the same time through each discharge port, realizing the partitioned coating of different slurries on the current collector. Moreover, the distance between two adjacent coating areas on the current collector is small, the coating operation is relatively simple, the time required to coat different slurries on the current collector is reduced, and the coating efficiency of the coating slurry is improved.
[0041] The embodiments of this application are described below with reference to the accompanying drawings.
[0042] Reference Figure 1 and Figure 2 The coating structure provided in this application embodiment includes: a coating die head 100 and a gasket 300. The coating die head 100 has at least two spaced-apart coating cavities 101 for supplying coating slurry flow.
[0043] The gasket 300 is located inside the coating die head 100. The gasket 300 includes at least two connecting plates 310 arranged in sequence. The two adjacent connecting plates 310 are staggered vertically. A discharge channel 102 is formed between the connecting plates 310 and the coating die head 100. One end of the discharge channel 102 is connected to the coating die cavity 101. The other end of the discharge channel 102 has a discharge port 103 for the coating slurry to flow out.
[0044] The connecting plate 310 has a guide surface 311 on the side near the outlet 103. The guide surface 311 is used to guide part of the coating slurry in the outlet 103 to flow toward the side away from the outlet 103. The guide surfaces 311 of two adjacent connecting plates 310 overlap vertically.
[0045] The coating mold cavities 101 are at least two in number and are spaced apart to ensure that each cavity is independently arranged and not interconnected. This allows different coating slurries to be filled into different mold cavities 101. Each mold cavity 101 is connected to a corresponding discharge channel 102, allowing the coating slurry within the mold cavity 101 to flow into the corresponding discharge channel 102 and out through the discharge port 103 of that channel. Thus, different slurries can be simultaneously coated onto the current collector through each discharge port 103.
[0046] It should be noted that the type of coating slurry can be adapted to actual needs, and this application embodiment does not impose any restrictions.
[0047] For example, each outlet 103 is located on the same side of the coating die 100, so that the coating slurry can be coated onto the current collector through each outlet 103. The shape of the outlet 103 can be rectangular, so that the thickness of the coating slurry flowing out of the outlet 103 is more uniform. The shape and size of each outlet 103 can be the same or different, and can be adapted according to actual needs. Furthermore, each outlet 103 can be located on the same plane.
[0048] Specifically, the coating slurry in the coating mold cavity 101 flows into the discharge channel 102 and then flows out through the discharge port 103 to coat the current collector. The coating slurry in each coating mold cavity 101 can be a different coating slurry, thus different coating slurries can be coated in different areas of the current collector.
[0049] In some examples, there are three discharge ports 103, three discharge channels 102, and three coating cavities 101, all arranged sequentially. The coating slurry in the middle coating cavity 101 is one type, while the coating slurry in the two end coating cavities 101 is another type. In practice, the solid content of the two coating slurries and the dimensions of each discharge channel 102 can be adjusted to achieve a higher surface density and compaction of the coating portion of the discharge channels 102 on the current collector than the middle discharge channel 102, thus making the central region of the formed electrode easier to wet. Alternatively, the characteristics of the two coating slurries can be designed so that after coating on the current collector, the thickness of the coating slurry in the center of the current collector is greater than the thickness of the coating slurry on both sides, thus solving the problems of over-pressure and wetting at the edge of the electrode during rolling.
[0050] In some embodiments, there are at least three coating cavities 101, and the coating slurry in each coating cavity 101 is different. In this case, the different characteristics of different coating slurries can be used to improve the conductivity of the electrode, or the different characteristics of particles with different particle sizes in different coating slurries can be used to improve the solid-phase diffusion performance of the electrode.
[0051] Specifically, the coating die 100 has a receiving portion, and the gasket 300 is located within the receiving portion. The connecting plate 310 has opposing first and second sides. One of the first and second sides of the connecting plate 310 abuts against the coating die 100, and the other side has a gap with the coating die 100 to form a discharge channel 102. In the prior art, the discharge ports of the coating structure are arranged sequentially and at intervals in the same direction. The distance between two adjacent discharge ports is relatively large, resulting in a large distance between the corresponding coating areas of two adjacent discharge ports on the current collector, which leads to discontinuity in the coating area of the coating structure on the current collector. In this embodiment, each connecting plate 310 is arranged sequentially along a preset direction. Two adjacent connecting plates 310 are staggered vertically and at least partially connected, so that the discharge channel 102 formed between the connecting plate 310 and the coating die head 100 is staggered vertically. The discharge port 103 is located at one end of the discharge channel 102, and each discharge port 103 is on the same side of the coating structure. Two adjacent discharge ports 103 are staggered vertically, and the distance between two adjacent discharge ports 103 is relatively short, thereby shortening the distance between the corresponding coating areas of two adjacent discharge ports 103 on the collector.
[0052] In some embodiments, in two adjacent connecting plates 310, the sidewall of one connecting plate 310 and the sidewall of the other connecting plate 310 are located on the same vertical plane, so as to further shorten the distance between two adjacent discharge ports 103, so that the corresponding coating areas of the two adjacent discharge ports 103 on the current collector overlap each other, thereby realizing continuous coating on the current collector.
[0053] A guide surface 311 is provided on the connecting plate 310. The guide surface 311 allows the coating slurry in the discharge channel 102 to flow towards the side away from the inside of the discharge port 103, thereby expanding the width of the coating area corresponding to the discharge port 103 on the collector. The guide surfaces 311 of two adjacent connecting plates 310 overlap vertically so that the coating areas corresponding to the two adjacent discharge ports 103 partially overlap on the collector. This ensures that the coating area of the coating structure on the collector is a complete and continuous area, while preventing foil leakage between the coating areas corresponding to the two adjacent discharge ports 103.
[0054] It should be noted that the coating area corresponding to the discharge port 103 on the current collector refers to the area coated on the current collector after the coating slurry in the discharge channel 102 flows out through the discharge port 103. The foil leakage phenomenon refers to the situation where, during the coating process, the surface of the current collector is not completely covered by the coating slurry, resulting in some of the metal foil of the current collector being exposed.
[0055] In some examples, the coating areas of two adjacent discharge ports 103 on the current collector may or may partially overlap.
[0056] It is understood that the thickness of the connecting plate 310 is the same as the height of the discharge channel 102. By adjusting the thickness of the connecting plate 310, the height of the discharge channel 102 can be adjusted, thereby adjusting the thickness of the coating slurry flowing through the discharge channel 102 and the discharge port 103 onto the collector. For example, the thickness of each connecting plate 310 can be the same.
[0057] The coating structure provided in this application embodiment, by setting at least two coating mold cavities 101, forms a discharge channel 102 between the connecting plate 310 and the coating die head 100. One end of the coating mold cavity 101 and the discharge channel 102 are correspondingly connected, and the other end of the discharge channel 102 has a discharge port 103. Thus, different coating slurries can be respectively set in each coating mold cavity 101, and then different coating slurries can be simultaneously coated onto the current collector through the corresponding discharge channel 102 and discharge port 103, achieving zoned coating of different slurries on the current collector. Different coating slurries can be coated onto different areas of the current collector in a single coating process using the battery production system, eliminating the need for multiple battery production systems or multiple coating dies to repeatedly coat different areas of the current collector with different coating slurries. The coating operation is simpler, reducing the time spent coating the current collector, improving the coating efficiency of the coating slurry, and reducing the cost of the battery production system. The coating structure provided in this embodiment of the application, by providing a guide surface 311 on the connecting plate 310, allows the coating slurry in the discharge channel 102 to flow towards the side away from the interior of the discharge port 103, thereby expanding the width of the coating area corresponding to the discharge port 103 on the collector. By making the guide surfaces 311 of two adjacent connecting plates 310 overlap vertically, the coating areas corresponding to two adjacent discharge ports 103 on the collector partially overlap, preventing foil leakage between the coating areas corresponding to two adjacent discharge ports 103. In this way, the coating slurry flowing out of two adjacent discharge ports 103 can overlap with each other on the collector, thereby making the coating area of the coating structure on the collector a complete and continuous area. Thus, the coating of the coating slurry on the collector can be completed in one coating operation by the coating structure.
[0058] In practice, the guide surface 311 is a chamfer set on the connecting plate 310. This makes the width of the overlapping area of the corresponding coating area of two adjacent discharge ports 103 on the collector smaller, which is beneficial to achieving the requirement of low-interval splicing of different slurries.
[0059] For example, the connecting plate 310 can be a cuboid, the discharge channel 102 is a rectangular channel, and the discharge port 103 is a rectangular port, so that the flow rate of the coating slurry flowing out through the discharge channel 102 and the discharge port 103 is more uniform, and the coating of the coating slurry flowing out through the discharge port 103 on the current collector is more uniform.
[0060] In practice, the guide surface 311 is an arc surface.
[0061] This facilitates the flow of coating slurry in the discharge channel 102 through the discharge port 103, improves the smoothness of the slurry coating in the junction area of the corresponding coating areas of two adjacent discharge ports 103 on the collector, and improves the accuracy of the boundary of the corresponding coating area of the discharge port 103 on the collector.
[0062] For example, the angle of the arc surface can be 30°-60°, and the radius of the arc surface can be adapted to actual needs.
[0063] In some embodiments, at least one connecting plate 310 includes a first mounting portion 312 and a second mounting portion 313, with a portion of the first mounting portion 312 inserted into the second mounting portion 313. The first mounting portion 312 moves relative to the second mounting portion 313 to adjust the width of the discharge channel 102.
[0064] The first mounting part 312 moves relative to the second mounting part 313 along a preset direction to adjust the width of the connecting plate 310 in the preset direction. This, in turn, adjusts the width of the discharge channel 102 and the discharge port 103 in the preset direction, thereby adjusting the width of the coating area corresponding to the discharge port 103 on the current collector. This improves the applicability of the gasket 300 and expands the applicable range of the coating structure.
[0065] Reference Figure 1 and Figure 3 In some embodiments, the coating structure provided in this application also includes at least one flow restrictor 200, which is disposed on the side of the connecting plate 310 facing the discharge channel 102.
[0066] The flow restrictor 200 is used to reduce the amount of coating slurry in the junction area of the coating areas corresponding to two adjacent discharge channels 102, thereby reducing the thickness of the coating slurry in the junction area and preventing the coating slurry in the junction area from being too thick.
[0067] For example, the discharge channel 102 includes a first discharge channel and a second discharge channel. One end of the first discharge channel has a first discharge port, and one end of the second discharge channel has a second discharge port. The first discharge port and the second discharge port are arranged alternately vertically. The flow restrictor 200 is disposed on the side of the first discharge channel near the second discharge channel to reduce the amount of coating slurry in the junction area of the coating area corresponding to the first discharge channel and the coating area corresponding to the second discharge channel.
[0068] In practice, the height of the flow limiting component 200 is less than the height of the connecting plate 310.
[0069] In this way, while reducing the thickness of the coating slurry at the junction of the coating areas corresponding to the two adjacent discharge channels 102, the width of the coating areas corresponding to the two adjacent discharge channels 102 remains unchanged, ensuring that the coating areas corresponding to the two adjacent discharge channels 102 on the current collector are continuous.
[0070] For example, the height of the current restrictor 200 can be 1 / 10 to 1 / 5 of the thickness of the gasket 300. For instance, the height of the current restrictor 200 can be 0.1 mm to 0.5 mm.
[0071] Reference Figure 1 , Figure 3 and Figure 4 In a specific implementation, the flow restrictor 200 has a flow guide 210, which is used to guide the coating slurry in the discharge channel 102 to flow toward the side away from the interior of the discharge channel 102.
[0072] In this process, by setting the flow guide 210, part of the coating slurry is guided to the junction area of the coating areas corresponding to the two adjacent discharge channels 102, which further prevents foil leakage in the junction area.
[0073] In some embodiments, the flow guide 210 includes an arc-shaped flow guide surface.
[0074] In this process, by setting an arc-shaped guide surface to guide the coating slurry in the discharge channel 102, the slurry in the discharge channel 102 can flow along the arc-shaped guide surface toward the side away from the interior of the discharge channel 102, and flow through the discharge port 103 to the junction area of the coating areas corresponding to the two adjacent discharge channels 102. At the same time, the coating slurry flows more smoothly when passing through the guide part 210, thereby improving the smoothness of the coating slurry coated on the collector.
[0075] For example, the flow restrictor 200 also includes a connecting surface disposed on one side of the arc-shaped guide surface, through which the coating slurry in the discharge channel 102 can flow sequentially along the connecting surface and the arc-shaped guide surface to the discharge port 103. Furthermore, the arc-shaped guide surface and the connecting surface are smoothly transitioned to facilitate the flow of the coating slurry along the connecting surface and the arc-shaped guide surface.
[0076] In a specific implementation, the coating die head 100 includes a first module 110 and a second module 120, and the coating die cavity 101 is located on at least one of the first module 110 and the second module 120.
[0077] The gasket 300 is located between the first module 110 and the second module 120. One side of the connecting plate 310 abuts against one of the first module 110 and the second module 120, and the other side of the connecting plate 310 forms a discharge channel 102 with the other of the first module 110 and the second module 120.
[0078] The first module 110 and the second module 120 are arranged opposite to each other and spaced apart, so as to form a receiving portion for receiving the gasket 300 between the first module 110 and the second module 120.
[0079] By providing a gasket 300 between the first module 110 and the second module 120, a certain buffering effect is provided between the first module 110 and the second module 120, so that the first module 110 and the second module 120 do not come into direct contact and generate friction, thereby reducing the wear of the first module 110 and the second module 120 and extending the service life of the coating structure.
[0080] For example, the first module 110 has a first connecting portion, and the second module 120 has a second connecting portion. The first connecting portion and the second connecting portion are correspondingly connected to each other to connect the first module 110 and the second module 120. For example, the connection method of the first connecting portion and the second connecting portion can be snap-fit, threaded connection, or welding. Furthermore, the first module 110 and the second module 120 can be connected by screws in sequence through the first module 110 and the washer 300 to connect the washer 300 between the first module 110 and the second module 120.
[0081] The connecting plate 310 has a first side and a second side facing each other. The first side faces the first module 110, and the second side faces the second module 120. The first side abuts against the first module 110, and a discharge channel 102 is formed between the second side and the second module 120. Alternatively, the second side abuts against the second module 120, and a discharge channel 102 is formed between the first side and the first module 110.
[0082] Reference Figure 2 In a specific implementation, the first module 110 has at least two coating cavities 101; the second module 120 has at least two coating cavities 101, and the coating cavities 101 on the first module 110 and the coating cavities 101 on the second module 120 are one-to-one.
[0083] For example, the coating cavities 101 on the first module 110 are arranged at intervals along a preset direction, and the coating cavities 101 on the second module 120 are also arranged at intervals along a preset direction. The preset direction is... Figure 2 The direction indicated by the middle arrow.
[0084] Specifically, the discharge channel 102 is located between two opposing coating cavities 101, and at least one of the two opposing coating cavities 101 is connected to the discharge channel 102. The coating slurry in the two opposing coating cavities 101 can be the same coating slurry.
[0085] It is understood that the shapes of the first module 110 and the second module 120 can be adapted to actual needs, and the shape of the coating mold cavity 101 can also be adapted to actual needs. This application embodiment does not impose any limitations on these aspects.
[0086] In a specific implementation, the gasket 300 also includes a mounting member 320, which is connected to the side of the connecting plate 310 away from the discharge port 103, and the two opposite sides of the mounting member 320 abut against the first module 110 and the second module 120.
[0087] The mounting member 320 connects each connecting plate 310 to provide support for the connecting plates 310. The mounting member 320 has opposing third and fourth sides. The third side faces and abuts against the first module 110. The third side is on the same plane as the first side of a portion of the connecting plates 310, ensuring a good seal between the gasket 300 and the first module 110. The fourth side faces and abuts against the second module 120. The fourth side is on the same plane as the second side of the remaining connecting plates 310, ensuring a good seal between the gasket 300 and the second module 120.
[0088] Reference Figure 3 and Figure 4 In a specific implementation, the gasket 300 also includes two limiting members 330, which are connected to the mounting member 320. The two opposite sides of the limiting members 330 abut against the first module 110 and the second module 120 respectively; each connecting plate 310 is disposed between the two limiting members 330.
[0089] In this design, along the length of the mounting component 320, the limiting member 330 is correspondingly connected to the connecting plate 310 at the end, thereby limiting the coating slurry in the discharge channels 102 at both ends of the mounting component 320 along its length, preventing the coating slurry from flowing out of the sides of the discharge channels 102. The length of the mounting component 320 is... Figure 3The direction indicated by the middle arrow. The length direction of the mounting component 320 can be the same as the setting direction of the coating cavity 101 on the first module 110, that is, the same as the preset direction.
[0090] The side of the limiting member 330 facing the first module 110 abuts against the first module 110, and the side of the limiting member 330 facing the first module 110 is on the same plane as the third side of the mounting member 320. The side of the limiting member 330 facing the second module 120 abuts against the second module 120, and the side of the limiting member 330 facing the second module 120 is on the same plane as the fourth side of the mounting member 320.
[0091] Specifically, in this embodiment, the connecting plate 310 includes a first connecting plate and two spaced-apart second connecting plates. The first connecting plate overlaps the two second connecting plates. There are two limiting members 330, which are connected to the sides of the two second connecting plates away from the first connecting plate. The limiting members 330, the second connecting plates, and the first connecting plate together define a first groove, and the first connecting plate and the two second connecting plates together define a second groove. The opening of the first groove faces the first module 110, and the first groove and the first module 110 together define the discharge channel 102. The opening of the second groove faces the second module 120, and the second opening and the second module 120 together define the discharge channel 102.
[0092] The flow restrictor 200 is connected to the side of the first connecting plate facing the first groove. The projection of the flow guide 210 on the first connecting plate can be located on one side of the flow guide surface 311 of the first connecting plate, or the projection of the flow guide 210 on the first connecting plate can be at least partially located on the flow guide surface 311 of the first connecting plate. Similarly, the flow restrictor 200 is connected to the side of the second connecting plate facing the second groove. The projection of the flow guide 210 on the second connecting plate can be located on one side of the flow guide surface 311 of the second connecting plate, or the projection of the flow guide 210 on the second connecting plate can be partially located on the flow guide surface 311 of the second connecting plate, thereby facilitating the flow guide 210 and the flow guide surface 311 to guide part of the coating slurry.
[0093] Reference Figure 2 In a specific implementation, the coating structure provided in this application embodiment also includes at least two feeding components 400, which are connected to the coating mold cavity 101. The feeding components 400 are used to transport the coating slurry into the coating mold cavity 101.
[0094] The material conveying component 400 is connected to the external coating slurry to transport the external coating slurry into the coating mold cavity 101. Each material conveying component 400 is independently configured and is connected to each coating mold cavity 101 in a one-to-one correspondence. Each material conveying component 400 can be connected to different coating slurries to transport different coating slurries into the corresponding coating mold cavity 101.
[0095] For example, the feeder 400 can be a feed tube.
[0096] Based on the above embodiments, this application also provides a coating device, including: a device body and a coating structure disposed on the device body.
[0097] The specific structure of the coating structure has been described in detail in the above embodiments, and will not be repeated here.
[0098] The coating equipment provided in this application embodiment has a coating structure with at least two coating cavities 101, each corresponding to a discharge channel 102, and a discharge port 103 at one end of the discharge channel 102. Therefore, a slurry storage structure can provide different coating slurries to each coating cavity 101, allowing different slurries to be simultaneously coated onto the current collector via each discharge channel 102 and discharge port 103, eliminating the need for multiple separate coatings and reducing the cost of the battery production system.
[0099] Based on the above embodiments, this application also provides a battery production system, including: a slurry storage structure and any of the above coating equipment, wherein the slurry storage structure is used to provide coating slurry to the coating equipment.
[0100] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.
[0101] In the embodiments of this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this application according to the specific circumstances.
[0102] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.
[0103] Unless otherwise stated, the term "multiple" means two or more.
[0104] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the scope of this application is limited only by the appended claims.
Claims
1. A coating structure, characterized in that, include: A coating die (100) having at least two spaced-apart coating cavities (101) for supplying coating slurry flow; A gasket (300) is located inside the coating die head (100). The gasket (300) includes at least two connecting plates (310). Two adjacent connecting plates (310) are staggered vertically. A discharge channel (102) is formed between the connecting plates (310) and the coating die head (100). One end of the discharge channel (102) is connected to the coating die cavity (101), and the other end of the discharge channel (102) has a discharge port (103) for the coating slurry to flow out.
2. The coating structure according to claim 1, characterized in that, The connecting plate (310) has a guide surface (311) on the side near the discharge port (103). The guide surface (311) is used to guide part of the coating slurry in the discharge port (103) to flow toward the side away from the discharge port (103). The guide surfaces (311) of two adjacent connecting plates (310) overlap vertically.
3. The coating structure according to claim 2, characterized in that, The guide surface (311) is a chamfer provided on the connecting plate (310).
4. The coating structure according to claim 2, characterized in that, The guide surface (311) is an arc surface.
5. The coating structure according to claim 1, characterized in that, At least one of the connecting plates (310) includes a first mounting portion (312) and a second mounting portion (313), a portion of the first mounting portion (312) is inserted into the second mounting portion (313), and the first mounting portion (312) moves relative to the second mounting portion (313) to adjust the width of the discharge channel (102).
6. The coating structure according to any one of claims 1-5, characterized in that, It also includes at least one flow restrictor (200) disposed on the side of the connecting plate (310) facing the discharge channel (102).
7. The coating structure according to claim 6, characterized in that, The height of the flow restrictor (200) is less than the height of the connecting plate (310).
8. The coating structure according to claim 6, characterized in that, The flow restrictor (200) has a flow guide (210) for guiding a portion of the coating slurry in the discharge channel (102) to flow toward a side away from the interior of the discharge channel (102).
9. The coating structure according to claim 8, characterized in that, The guide section (210) includes an arc-shaped guide surface.
10. The coating structure according to any one of claims 1-5, characterized in that, The coating die head (100) includes a first module (110) and a second module (120), and the coating cavity (101) is located on at least one of the first module (110) and the second module (120); The gasket (300) is located between the first module (110) and the second module (120). One side of the connecting plate (310) abuts against one of the first module (110) and the second module (120), and the other side of the connecting plate (310) forms the discharge channel (102) between the first module (110) and the second module (120).
11. The coating structure according to claim 10, characterized in that, The first module (110) has at least two coating cavities (101), and the second module (120) has at least two coating cavities (101), with the coating cavities (101) on the first module (110) and the coating cavities (101) on the second module (120) being opposite to each other.
12. The coating structure according to claim 10, characterized in that, The gasket (300) also includes a mounting member (320), which is connected to the side of the connecting plate (310) away from the discharge port (103), and the opposite two sides of the mounting member (320) abut against the first module (110) and the second module (120).
13. The coating structure according to claim 12, characterized in that, The gasket (300) also includes two limiting members (330), which are connected to the mounting member (320). The opposite two sides of the limiting members (330) abut against the first module (110) and the second module (120). Each of the connecting plates (310) is disposed between the two limiting members (330).
14. The coating structure according to any one of claims 1-5, characterized in that, It also includes at least two feeding components (400), which are connected to the coating mold cavity (101) and are used to transport the coating slurry into the coating mold cavity (101).
15. A coating apparatus, characterized in that, include: The device body and the coating structure according to any one of claims 1-14 disposed on the device body.
16. A battery production system, characterized in that, include: The slurry storage structure and the coating apparatus of claim 15, wherein the slurry storage structure is used to provide coating slurry to the coating apparatus.