Lithium battery coating die and coating apparatus
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HEFEI GUOXUAN HIGH TECH POWER ENERGY
- Filing Date
- 2023-08-31
- Publication Date
- 2026-07-21
Smart Images
Figure CN117160789B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of lithium-ion battery electrode coating equipment technology, and more specifically, to a lithium battery coating die and coating equipment. Background Technology
[0002] Lithium-ion batteries have high energy density and a wide operating temperature range, approximately -20℃ to 60℃. They exhibit excellent cycle performance, rapid charging and discharging, high charging efficiency, high output power, and long service life. They also do not contain toxic or harmful substances, and their cell materials can be recycled, thus earning them the title of "green batteries."
[0003] Currently, lithium batteries are widely used in various new energy vehicles and energy storage fields. In the energy storage field, lithium batteries, mainly lithium iron phosphate, have demonstrated significant advantages, such as expanding charging capacity and peak shaving / valley filling. With the booming development of the battery industry, applying lithium batteries to portable and backup power applications will expand their service scope, leverage their advantages, and have potential for widespread promotion and commercial application.
[0004] In the battery manufacturing industry, especially in the field of lithium-ion power batteries for new energy vehicles and energy storage, the requirements for battery consistency are becoming increasingly stringent. The consistency of electrode coating is particularly critical. To ensure the consistency of battery electrodes, multiple servo-motor driven flow-blocking blocks are used during coating to adjust the gap at the slurry outlet. The size of the outlet is adjusted in real-time using a closed-loop system based on the measured coating surface density to achieve a uniform coating surface density.
[0005] To control the thickness of foil coatings, the traditional solution is to install several manually adjustable micrometers on the coating die head to adjust the height of the adjusting blocks, thereby controlling the slurry flow rate and thus controlling the coating thickness.
[0006] However, the traditional solution has the following drawbacks: 1. Manual adjustment of the micrometer is prone to operational errors, which is time-consuming, labor-intensive, and has poor adjustment accuracy and low efficiency; 2. When there is a height difference between several adjustment blocks, a significant step-like layer difference will also be generated on the resulting foil coating, which will lead to adverse phenomena such as lithium plating in lithium batteries. Summary of the Invention
[0007] The main objective of this invention is to provide a lithium battery coating die and coating equipment that can improve the adjustment efficiency of the lithium battery coating die, reduce the step-like layer difference on the coating, and improve the coating effect.
[0008] To achieve the above objectives, according to one aspect of the present invention, a lithium battery coating die head is provided, comprising: Lower mold; The upper mold is set on the upper side of the lower mold and forms a material passage gap between them. The material passage gap forms a material outlet at the end. At least two adjustment mechanisms are installed on the upper mold. The adjustment mechanism includes an adjustment block assembly capable of adjusting the coating thickness at the discharge port. The adjustment block assembly includes a fixed block and a floating block.
[0009] Furthermore, at least two floating blocks are provided on at least one side of the fixed block along the arrangement direction of the adjustment mechanism, and the floating blocks can adjust their floating height according to the extrusion pressure of the slurry.
[0010] Furthermore, there is friction between adjacent floating blocks and between floating blocks and fixed blocks. This friction can generate interaction between the floating blocks and adjacent floating blocks or fixed blocks when the floating blocks are subjected to the squeezing force of the slurry.
[0011] Furthermore, a top plate is provided on the top of the fixed block, and the floating block is elastically connected to the top plate through an elastic element.
[0012] Furthermore, a guide post is provided on the upper surface of the floating block. The guide post passes through the top plate and can slide relative to the top plate. An elastic element is sleeved on the outside of the guide post. The first end of the elastic element is fixedly connected to the top plate, and the second end of the elastic element is fixedly connected to the floating block.
[0013] Furthermore, a limit ring is fixedly provided at the end of the guide post near the floating block; and / or, a limit ring is fixedly provided at the end of the guide post away from the floating block.
[0014] Furthermore, the incoming flow side of the fixed block and the floating block is provided with a guide ramp; and / or, in the natural state, the bottom surface height of the floating block is lower than the bottom surface height of the fixed block.
[0015] Furthermore, the bottom of the floating block is either a flat surface or a convex arc surface.
[0016] Furthermore, the adjusting block assembly also includes a column, and the adjusting mechanism also includes a servo motor. One end of the column is fixedly connected to the fixed block, and the other end of the column is connected to the drive end of the servo motor, and the fixed block moves up and down under the drive of the servo motor.
[0017] Furthermore, a threaded rod is provided at the top of the column, and the adjustment mechanism also includes a coupling and a sleeve. The drive end of the servo motor is provided with an output shaft. The first end of the coupling is connected to the output shaft, and the second end of the coupling is fixedly provided with a sleeve. The threaded rod is screwed to the sleeve.
[0018] Furthermore, the adjustment mechanism also includes a mounting plate, which is fixedly mounted on the upper mold.
[0019] Furthermore, the material passage gap forms a flow channel, which includes an inclined guide section located on the material receiving side of the fixed block and whose height increases along the direction close to the fixed block.
[0020] Furthermore, the incoming flow side of the fixed block and the floating block is provided with a guide slope, the inclined guide section extends toward the guide slope, and the end of the inclined guide section is provided corresponding to the beginning end of the guide slope.
[0021] Furthermore, a gasket is provided between the upper mold and the lower mold. The gasket has a U-shaped structure and its opening faces the discharge port. The upper mold, the gasket, and the lower mold are fixedly connected and form a sealed fit.
[0022] Furthermore, a dividing strip is provided in the middle area of the gasket, which extends toward the discharge port and divides the discharge port into multiple sections.
[0023] Furthermore, both the upper and lower dies include inclined guide surfaces, and the shim includes an inclined support section. The structure of the inclined support section is adapted to the gap formed by the inclined guide surfaces of the upper and lower dies. The upper die, lower die, and shim form a flow channel. The flow channel includes an inclined guide section, which is located on the material receiving side of the fixed block and increases in height along the direction close to the fixed block.
[0024] According to another aspect of the present invention, a coating apparatus is provided, including a lithium battery coating die, wherein the lithium battery coating die is the lithium battery coating die described above.
[0025] According to the technical solution of this invention, a lithium battery coating die head includes: a lower die; an upper die disposed on the upper side of the lower die, forming a material passage gap between the upper die and the lower die, the material passage gap forming a discharge port at its end; and at least two adjustment mechanisms installed on the upper die. Each adjustment mechanism includes an adjustment block assembly capable of adjusting the coating thickness at the discharge port, the adjustment block assembly including a fixed block and a floating block. The adjustment block assembly of this lithium battery coating die head includes fixed blocks and floating blocks, with the floating blocks located between adjacent floating blocks. During the material coating process, when there is a height difference between adjacent fixed blocks, the floating blocks, under the pressure of the slurry and / or the friction between them, will cause the height change area between the fixed blocks to become gradual, so that the height difference between adjacent fixed blocks forms a continuously changing height difference under the action of the floating blocks. This changes the abrupt change in coating thickness, improves the adjustment efficiency of the lithium battery coating die head, makes the thickness transition smoother, and effectively improves the coating effect. Attached Figure Description
[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1A three-dimensional structural diagram of a lithium battery coating die head according to an embodiment of the present invention is shown; Figure 2 A side view of the lithium battery coating die head according to an embodiment of the present invention is shown; Figure 3 yes Figure 1 Schematic diagram of the AA-direction cross-section structure; Figure 4 yes Figure 1 Schematic diagram of the BB-direction cross-section structure in the middle; Figure 5 yes Figure 1 Schematic diagram of the CC-direction cross-section structure in the middle; Figure 6 A schematic diagram of the structure of the lower mold of the lithium battery coating die head according to an embodiment of the present invention is shown; Figure 7 A schematic diagram of the structure of the gasket of the lithium battery coating die head according to an embodiment of the present invention is shown; Figure 8 A schematic diagram of the front structure of the upper mold of the lithium battery coating die head according to an embodiment of the present invention is shown; Figure 9 A schematic diagram of the back structure of the upper mold of the lithium battery coating die head according to an embodiment of the present invention is shown; Figure 10 A schematic diagram of the structure of the lithium battery coating die head after assembly of the gasket and the lower die is shown in an embodiment of the present invention. Figure 11 A front perspective view of the adjustment block assembly of the lithium battery coating die head according to an embodiment of the present invention is shown. Figure 12 A three-dimensional structural diagram of the back of the adjusting block assembly of the lithium battery coating die head according to an embodiment of the present invention is shown; Figure 13 A side view and a partially enlarged structural schematic diagram of the adjustment block assembly of the lithium battery coating die head according to an embodiment of the present invention are shown. Figure 14 This diagram shows a front view of the adjustment block assembly of a lithium battery coating die head according to an embodiment of the present invention. Figure 15 This diagram illustrates the initial state of the adjusting block assembly when the fixed block is at the same height and no slurry is introduced, according to an embodiment of the present invention. Figure 16 This diagram illustrates the state of the adjusting block assembly when slurry is introduced into the lithium battery coating die head according to an embodiment of the present invention, with the fixed block at the same height. Figure 17 The diagram illustrates the state of the adjusting block assembly when slurry is introduced into the lithium battery coating die head according to an embodiment of the present invention, with the fixed block at different heights.
[0027] The above figures include the following reference numerals: 10. Lower mold; 101. Inlet; 102. First storage tank; 103. Second storage tank; 104. Lower mold fastening hole; 20. Gasket; 201. Gasket fastening hole; 30. Upper mold; 301. Mounting groove; 302. Upper mold fastening hole; 40. Adjustment mechanism; 401. Servo motor; 402. Mounting plate; 403. Output shaft; 404. Coupling; 405. Sleeve; 406. Adjustment block assembly; 407. Sealing ring; 4061. Fixed block; 4062. Floating block; 4063. Top plate; 4064. Guide post; 4065. Spring; 4066. Limiting ring; 4067. Column; 4068. Threaded rod; 50. Flow channel; 501. Outlet. Detailed Implementation
[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0029] See also Figures 1 to 17 As shown, the present invention provides a lithium battery coating die head, comprising: a lower die 10; an upper die 30 disposed on the upper side of the lower die 10 and forming a material passage gap between the upper die 10 and the lower die 10, the material passage gap forming a material outlet at its end; and at least two adjustment mechanisms 40 mounted on the upper die 30, the adjustment mechanism 40 including an adjustment block assembly 406 capable of adjusting the coating thickness of the material outlet, the adjustment block assembly 406 including a fixed block 4061 and a floating block 4062.
[0030] In one embodiment, at least two floating blocks 4062 are provided on at least one side of the fixed block 4061 along the arrangement direction of the adjusting mechanism 40, and the floating blocks 4062 can adjust their floating height according to the extrusion pressure of the slurry.
[0031] The adjusting block assembly 406 of the lithium battery coating die head includes a fixed block 4061 and a floating block 4062. The floating block 4062 is located between adjacent fixed blocks 4061. During the material coating process, when there is a height difference between adjacent fixed blocks 4061, the floating block 4062, under the action of the slurry extrusion pressure and / or the friction between them, will promote the smoothing of the height change area between the fixed blocks 4061. This makes the height difference between adjacent fixed blocks 4061 continuously change under the action of the floating block 4062, thereby changing the degree of abrupt change in coating thickness, improving the adjustment efficiency of the lithium battery coating die head, making the thickness transition smoother, and effectively improving the coating effect.
[0032] In one embodiment, there is friction between adjacent floating blocks 4062 and between floating blocks 4062 and fixed blocks 4061. The friction can generate interaction between the floating blocks 4062 and adjacent floating blocks 4062 or fixed blocks 4061 when the floating blocks 4062 are subjected to the squeezing force of the slurry.
[0033] In this embodiment, the contact surfaces of adjacent floating blocks 4062 are not smooth surfaces, but have a certain amount of friction. This allows the adjacent floating blocks 4062 to move together when one of them moves, thanks to the interaction of friction. The closer the floating block is to the fixed block 4061, the greater the influence of the friction force from the fixed block 4061. In this way, when the heights of adjacent fixed blocks 4061 are different, the floating blocks 4062 can be positioned at different locations according to their distance from the fixed blocks 4061, under the combined action of the slurry's squeezing force and the friction force between them. This creates a continuously varying height difference, allowing the coating thickness of the slurry to also vary continuously, reducing the abrupt change in the coating thickness and improving the coating effect.
[0034] In one embodiment, a top plate 4063 is provided on the top of the fixed block 4061, and the floating block 4062 is elastically connected to the top plate 4063 through an elastic member.
[0035] In this embodiment, by providing a top plate 4063 on the top of the fixed block 4061, the floating block 4062 can be easily installed, allowing it to be suspended on the top plate 4063 and float up and down under the pressure of the slurry. The top plate 4063 can be integrally formed with the fixed block 4061, or it can be separately formed from the fixed block 4061 and then fixedly connected together by screws or welding.
[0036] In this embodiment, the top two sides of the fixed block 4061 extend laterally to form a top plate 4063. Multiple floating blocks 4062 are suspended on the top plates 4063 on both sides, so that a floating structure can be formed on both sides of the fixed block 4061. This allows the adjacent fixed blocks 4061 to form a small height difference between them through the floating blocks 4062, thereby improving the coating effect.
[0037] A top plate 4063 is provided on top of the fixed block 4061, which can make full use of the space on both sides of the fixed block 4061. The floating block 4062 can be designed with a similar structure to the fixed block 4061, so that the floating performance of the floating block 4062 can be more easily controlled and the desired coating pattern can be obtained. The elastic element can apply an elastic force to the floating block 4062, so that when the floating block 4062 is subjected to the squeezing action of the slurry, a balance will be formed between the floating block 4062 and the elastic element. This allows the floating of the floating block 4062 to change continuously, and the position adjustment of the floating block 4062 can always be achieved by utilizing the balance between the squeezing action of the slurry and the elastic force of the elastic element, which more effectively ensures the continuity of the height change of the floating block 4062 at different positions.
[0038] In one embodiment, a guide post 4064 is provided on the upper surface of the floating block 4062. The guide post 4064 passes through the top plate 4063 and can slide relative to the top plate 4063. An elastic element is sleeved on the outside of the guide post 4064. The first end of the elastic element is fixedly connected to the top plate 4063, and the second end of the elastic element is fixedly connected to the floating block 4062.
[0039] In this embodiment, by providing guide posts 4064 on the upper surface of the floating block 4062, the floating block 4062 can be guided by the guide posts 4064, avoiding deviation during the floating process of the floating block 4062, ensuring the accuracy of the movement direction of the floating block 4062, and facilitating precise control of the movement of the floating block 4062.
[0040] In one embodiment, a limit ring 4066 is fixedly provided at one end of the guide post 4064 near the floating block 4062.
[0041] In one embodiment, a limit ring 4066 is fixedly provided at the end of the guide post 4064 away from the floating block 4062.
[0042] In one embodiment, the elastic element is a spring 4065, and the adjusting block assembly 406 mainly consists of a fixed block 4061, a floating block 4062, a top plate 4063, a column 4067, and a threaded rod 4068. The top plate 4063 is fixedly connected to the fixed block 4061 and the column 4067. Several floating blocks 4062 are respectively arranged on both sides of the fixed block 4061. The two ends of the spring 4065 are fixed to the lower surface of the top plate 4063 and the upper surface of the floating blocks 4062. The end of the guide post 4064 is fixed to the upper surface of the floating block 4062, and the guide post 4064 is located within the inner ring of the spring 4065. The guide post 4064 passes through the top plate 4063 and can move freely in the vertical direction. A limit ring 4066 is fixedly arranged near the tail end of the guide post 4064. The limit ring 4066 is located within the inner ring of the spring 4065, and its function is to prevent the spring 4065 from being subjected to extreme pressure. A limit ring 4066 is also fixedly installed on the guide post 4064 near the top and above the top plate 4063. Its function is to prevent the spring 4065 from being stretched to the limit and to prevent the guide post 4064 from detaching from the top plate 4063.
[0043] In one embodiment, the incoming flow sides of the fixed block 4061 and the floating block 4062 are provided with guide slopes. In this embodiment, by setting the incoming flow sides of the fixed block 4061 and the floating block 4062 as guide slopes, the flow of the slurry can be guided by the guide slopes, reducing the impact of the slurry on the fixed block 4061 and the floating block 4062 during the slurry flow. This makes it easier for the slurry to enter the gap formed between the fixed block 4061 and the floating block 4062 and the lower mold 10. This not only improves the structural stability of the fixed block 4061 and the floating block 4062 during the slurry flow, but also makes it easier to adjust the vertical floating of the floating block 4062. This ensures that the force exerted by the slurry on the floating block 4062 is obliquely upward, thereby squeezing the floating block 4062 to move vertically upward.
[0044] For a single adjusting block assembly 406, the slope angles of the fixed block 4061 and the floating block 4062 can be the same or different. The width, bottom height, and slope angle of several floating blocks 4062 can be the same or different from each other.
[0045] In one embodiment, the bottom of the floating block 4062 is a flat surface or a convex arc surface.
[0046] When the bottom of the floating block 4062 is set as a convex arc surface, the flow resistance of the slurry flowing through the floating block 4062 can be further reduced, the pressure loss during the slurry flow process can be reduced, and the flow efficiency of the slurry can be improved.
[0047] In one embodiment, in its natural state, the bottom height of the floating block 4062 is lower than the bottom height of the fixed block 4061. In its natural state, the floating block 4062 is suspended. Therefore, the spring 4065 needs to overcome the weight of the floating block 4062 to keep it in equilibrium. When the spring force of the spring 4065 is zero, the bottom of the floating block 4062 needs to be flush with the fixed block 4061 to minimize the step difference between the floating block 4062's vertical movement and the fixed block 4061. Therefore, in its natural state, the bottom height of the floating block 4062 is lower than the bottom height of the fixed block 4061 to ensure that when the bottom of the floating block 4062 is flush with the fixed block 4061, the spring force of the spring 4065 is zero.
[0048] In one embodiment, the adjusting block assembly 406 further includes a column 4067, and the adjusting mechanism 40 further includes a servo motor 401. One end of the column 4067 is fixedly connected to the fixed block 4061, and the other end of the column 4067 is connected to the drive end of the servo motor 401, and drives the fixed block 4061 to move up and down under the driving action of the servo motor 401.
[0049] In this embodiment, by providing the column 4067, the connection between the fixed block 4061 and the servo motor 401 can be easily achieved, enabling the servo motor 401 to drive and control the fixed block 4061 up and down. The column 4067 is connected to the top of the fixed block 4061 and extends towards the servo motor 401, connecting with the drive end of the servo motor 401 to achieve drive engagement. The servo motor 401 can also be replaced by other drive mechanisms, such as a telescopic rod or a telescopic cylinder.
[0050] In one embodiment, the adjusting mechanism 40 further includes a coupling 404 and a sleeve 405. The drive end of the servo motor 401 is provided with an output shaft 403. The first end of the coupling 404 is connected to the output shaft 403, and the second end of the coupling 404 is fixedly provided with a sleeve 405. The threaded rod 4068 is screwed to the sleeve 405.
[0051] In this embodiment, by setting a coupling 404, the drive connection between the servo motor 401 and the column 4067 can be easily realized. One end of the coupling 404 is fixedly connected to the output shaft 403, and the other end is fixedly connected to the sleeve 405. The sleeve 405 has an internal thread, which facilitates screwing with the threaded rod 4068. The threaded rod 4068 is connected to the column 4067, and the drive connection between the column 4067 and the adjusting block assembly 406 is realized.
[0052] In one embodiment, the adjustment mechanism 40 further includes a mounting plate 402, which is fixedly mounted on the upper mold 30.
[0053] The mounting plate 402 has a Z-shaped structure, which facilitates installation and fixation on the upper mold 30, and also facilitates fixed connection with the servo motor 401 to support and fix the servo motor 401. Furthermore, the two support plates of the Z-shaped structure are located on different sides of the middle vertical plate, thus avoiding interference between the adjustment mechanism 40 and the lower support plate of the Z-shaped structure during installation.
[0054] In one embodiment, the material passage gap forms a flow channel 50, which includes an inclined guide section located on the material receiving side of the fixed block 4061 and increasing in height along the direction close to the fixed block 4061. This guide section can guide the flow of the slurry, making the slurry flow upward at an angle, which is more convenient for forming a flow fit with the fixed block 4061 and the floating block 4062, and reducing the flow resistance at the fixed block 4061 and the floating block 4062.
[0055] In one embodiment, the incoming flow side of the fixed block 4061 and the floating block 4062 is provided with a guide ramp. An inclined guide section extends toward the guide ramp, and the end of the inclined guide section corresponds to the beginning of the guide ramp. This allows the inclined guide section of the flow channel 50 to form a good connection with the guide ramps on the fixed block 4061 and the floating block 4062, constricting the flow of the slurry. While reducing the slurry flow resistance, this allows the slurry to be discharged along the discharge height defined by the discharge ends of the fixed block 4061 and the floating block 4062, achieving the required coating thickness. The floating block 4062 can be made of a wear-resistant and slurry corrosion-resistant metal material.
[0056] In one embodiment, a gasket 20 is provided between the upper mold 30 and the lower mold 10. The gasket 20 has a U-shaped structure and its opening faces the discharge port. The upper mold 30, the gasket 20, and the lower mold 10 are fixedly connected and form a sealed fit.
[0057] The lithium battery coating die head mainly consists of a lower die 10, a gasket 20, an upper die 30, and an adjustment mechanism 40. The gasket 20 is clamped between the lower die 10 and the upper die 30 to seal the gap between them. It can also plan the path of the flow channel 50 between the lower die 10 and the upper die 30, so that the slurry can flow along the preset path, improving the control accuracy of the slurry.
[0058] The lower mold 10 has an inlet 101, a first storage tank 102, and a second storage tank 103. The inlet 101 is connected to the first storage tank 102. The cross-sections of the first storage tank 102 and the second storage tank 103 are both semi-circular, and the cross-sectional radius of the first storage tank 102 is larger than that of the second storage tank 103. The first storage tank 102 serves both as a storage tank and a buffer, allowing the slurry to enter from the inlet 101 and form a buffer, reducing the impact force and flow velocity of the slurry, making the flow process of the slurry easier to control and the flow accuracy easier to control. After the slurry enters the first storage tank 102, part of it will be temporarily stored in the first storage tank 102, and the other part will continue to flow along the flow channel 50 into the second storage tank 103, where it will be buffered and temporarily stored again. After flowing out of the second storage tank 103, it will flow along the flow channel 50 to the discharge port 501, where it will be coated.
[0059] In one embodiment, a dividing strip is provided in the middle region of the gasket 20, the dividing strip extending toward the discharge port and dividing the discharge port into multiple parts.
[0060] In this embodiment, by setting a separator, the coating area can be easily divided according to the different numbers of lithium batteries to be coated, thereby enabling simultaneous coating of multiple lithium batteries and improving coating efficiency. Utilizing the structure of the spacer 20 to separate the coating area simplifies operation and reduces costs.
[0061] In one embodiment, both the upper mold 30 and the lower mold 10 include inclined guide surfaces, and the gasket 20 includes an inclined support section. The structure of the inclined support section is adapted to the gap formed by the inclined guide surfaces of the upper mold 30 and the lower mold 10. The upper mold 30, the lower mold 10, and the gasket 20 form a flow channel 50. The flow channel 50 includes an inclined guide section located on the material receiving side of the fixing block 4061 and increasing in height along the direction close to the fixing block 4061.
[0062] A mounting groove 301 is provided on the upper mold 30 for placing the adjusting block assembly 406. A sealing ring 407 is provided between the mounting groove 301 and the column 4067 to prevent slurry overflow. The mounting plate 402 on the adjusting mechanism 40 is fixedly mounted on the upper mold 30.
[0063] The adjustment mechanism 40 mainly consists of a servo motor 401, a mounting plate 402, a coupling 404, a sleeve 405, an adjustment block assembly 406, and a sealing ring 407. The servo motor 401 is mounted on the mounting plate 402. The two ends of the coupling 404 are fixedly connected to the output shaft 403 of the servo motor 401 and the sleeve 405, respectively. The inner ring of the sleeve 405 has a threaded structure and is threadedly connected to a threaded rod 4068 at its tail end.
[0064] After the gasket 20 is clamped between the lower mold 10 and the upper mold 30 by fastening bolts, a flow channel 50 is formed. The slurry flows sequentially through the inlet 101, the first storage tank 102, the second storage tank 103, and the flow channel 50, and finally flows to the outlet 501.
[0065] In the lower mold 10, the first storage tank 102 and the second storage tank 103 are both located in area S1. Areas S1 and S3 are both horizontal areas, while area S2 is a sloping area with a certain angle. Several lower mold fastening holes 104 are provided in areas S1 and S3, and all lower mold fastening holes 104 are located in the outer edge area.
[0066] The gasket 20 has a thin sheet structure, where regions T1 and T3 are horizontal planes, and region T2 is a sloping plane with a certain angle. Several gasket fastening holes 201 are provided in regions T1 and T3, and the gasket fastening holes 201 are all located in the outer edge area.
[0067] In the upper mold 30, areas M1 and M3 are both horizontal planes, while area M2 is a sloping plane with a certain angle. Several upper mold fastening holes 302 are provided in areas M1 and M3, and all upper mold fastening holes 302 are located within the outer edge area. A mounting groove 301 is formed in area M3.
[0068] The inclination angles of the inclined areas of the lower mold 10, the gasket 20, and the upper mold 30 can be the same or different. The flow channel 50 located between the second storage tank 103 and the placement tank 301 is inclined upward, so that the direction of the force applied by the slurry to the floating block 4062 is inclined upward, thereby squeezing the floating block 4062 to move upward in the vertical direction.
[0069] The lower mold fastening hole 104, the gasket fastening hole 201, and the upper mold fastening hole 302 are connected, and the lower mold 10, the gasket 20, and the upper mold 30 are fixed together by fastening bolts.
[0070] Figure 15 This is a schematic diagram of the initial state of the adjusting block assembly 406 when the fixed blocks 4061 are at the same height and no slurry is introduced. In this embodiment, the adjusting block assembly 406 located on the far left has a floating block 4062 only on the right side of the fixed block 4061, but it can also have floating blocks 4062 on both its left and right sides; the adjusting block assembly 406 located on the far right has a floating block 4062 only on the left side of the fixed block 4061, but it can also have floating blocks 4062 on both its left and right sides.
[0071] Figure 16This is a schematic diagram of the state of the adjusting block assembly 406 after the fixed block 4061 is at the same height and slurry is introduced. At this time, the inclined surface of the floating block 4062 is squeezed by the slurry and moves upward in the vertical direction, and its bottom height gradually becomes consistent with the bottom height of the fixed block 4061.
[0072] Figure 17 This diagram illustrates the state of the adjusting block assembly 406 after slurry is introduced when the fixed block 4061 is at different heights. At this time, the inclined surface of the floating block 4062 is affected by the combined effects of the slurry's compression and the friction between the floating blocks 4062, resulting in different height differences between each floating block 4062. Changing the installation position of the limiting ring 4066 can limit the maximum fluctuation range of the height difference of the floating blocks 4062.
[0073] The implementation process of the lithium battery coating die head is as follows: After installing several adjustment mechanisms 40 in the upper mold 30, the bottom surface height of each fixed block 4061 is kept consistent under initial conditions, such as... Figure 15 As shown.
[0074] The slurry enters through the inlet 101, flows sequentially through the first storage tank 102, the second storage tank 103, and the flow channel 50, gradually moving towards the outlet 501. The floating block 4062 moves vertically upwards due to the upward pressure exerted by the slurry. Figure 16 As shown.
[0075] Due to factors such as equipment manufacturing errors and long-term wear of parts by the slurry, if uneven coating thickness occurs, the coating thickness can be adjusted by controlling each individual adjustment mechanism 40.
[0076] At this time, when the servo motor 401 drives the output shaft 403 to rotate, the sleeve 405 rotates due to the connection of the coupling 404. It is worth noting that the sleeve 405 only rotates and cannot move in the vertical direction.
[0077] Since the inner ring of the sleeve 405 and the threaded rod 4068 are threadedly engaged, when the sleeve 405 rotates, the threaded rod 4068 will move in the vertical direction, thereby driving the adjusting block assembly 406 to move in the vertical direction, thus changing the discharge flow rate of the discharge port 501 and realizing the automatic adjustment of the coating thickness.
[0078] like Figure 17 As shown, the inclined surface of the floating block 4062 is subjected to the combined effects of the slurry's squeezing force and the friction between the floating blocks 4062, resulting in different height differences between each floating block 4062. These height differences can improve the degree of abrupt changes in coating thickness, making the thickness transition smoother.
[0079] According to an embodiment of the present invention, the coating equipment includes a lithium battery coating die head, which is the lithium battery coating die head described above.
[0080] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0081] It should be noted that the terms "first," "second," etc., used 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 so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.
[0082] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A lithium battery coating die head, characterized in that, include: Lower mold (10); The upper mold (30) is disposed on the upper side of the lower mold (10) and forms a material passage gap with the lower mold (10), and the material passage gap forms a material outlet at the end; At least two adjustment mechanisms (40) are installed on the upper mold (30) and arranged sequentially along the length of the discharge port. The adjustment mechanism (40) includes an adjustment block assembly (406) capable of adjusting the coating thickness of the discharge port. The adjustment block assembly (406) includes a fixed block (4061) and a floating block (4062). The floating block (4062) is located between adjacent fixed blocks (4061). During the coating process, when there is a height difference between adjacent fixed blocks (4061), the floating block (4062) causes the height change area between the fixed blocks (4061) to be smooth under the action of the slurry extrusion force and the friction force between them, so that the height difference between adjacent fixed blocks (4061) forms a continuously changing height difference under the action of the floating block (4062).
2. The lithium battery coating die head according to claim 1, characterized in that, The fixed block (4061) is provided with at least two floating blocks (4062) on at least one side of the arrangement direction of the adjustment mechanism (40), and the floating blocks (4062) can adjust their floating height according to the extrusion pressure of the slurry.
3. The lithium battery coating die head according to claim 1, characterized in that, The top of the fixed block (4061) is provided with a top plate (4063), and the floating block (4062) is elastically connected to the top plate (4063) through an elastic element.
4. The lithium battery coating die head according to claim 3, characterized in that, The upper surface of the floating block (4062) is provided with a guide post (4064), the guide post (4064) passes through the top plate (4063) and can slide relative to the top plate (4063). The elastic element is sleeved on the outside of the guide post (4064), the first end of the elastic element is fixedly connected to the top plate (4063), and the second end of the elastic element is fixedly connected to the floating block (4062).
5. The lithium battery coating die head according to claim 4, characterized in that, A limit ring (4066) is fixedly provided at one end of the guide post (4064) near the floating block (4062); and / or, a limit ring (4066) is fixedly provided at one end of the guide post (4064) away from the floating block (4062).
6. The lithium battery coating die head according to any one of claims 1 to 5, characterized in that, The fixed block (4061) and the floating block (4062) are provided with guide slopes on the incoming flow side; and / or, in the natural state, the bottom height of the floating block (4062) is lower than the bottom height of the fixed block (4061).
7. The lithium battery coating die head according to any one of claims 1 to 5, characterized in that, The bottom of the floating block (4062) is a flat surface or a convex arc surface.
8. The lithium battery coating die head according to any one of claims 1 to 5, characterized in that, The adjusting block assembly (406) also includes a column (4067), and the adjusting mechanism (40) also includes a servo motor (401). One end of the column (4067) is fixedly connected to the fixed block (4061), and the other end of the column (4067) is connected to the drive end of the servo motor (401), and the fixed block (4061) moves up and down under the driving action of the servo motor (401).
9. The lithium battery coating die head according to claim 8, characterized in that, The top of the column (4067) is provided with a threaded rod (4068). The adjustment mechanism (40) also includes a coupling (404) and a sleeve (405). The drive end of the servo motor (401) is provided with an output shaft (403). The first end of the coupling (404) is connected to the output shaft (403). The second end of the coupling (404) is fixedly provided with the sleeve (405). The threaded rod (4068) is screwed to the sleeve (405).
10. The lithium battery coating die head according to claim 8, characterized in that, The adjustment mechanism (40) also includes a mounting plate (402), and the adjustment mechanism (40) is fixedly mounted on the upper mold (30) via the mounting plate (402).
11. The lithium battery coating die head according to any one of claims 1 to 5, characterized in that, The material passage gap forms a flow channel (50), the flow channel (50) includes an inclined guide section, the inclined guide section is located on the material receiving side of the fixed block (4061), and the height increases along the direction close to the fixed block (4061).
12. The lithium battery coating die head according to claim 11, characterized in that, The fixed block (4061) and the floating block (4062) are provided with guide slopes on the incoming flow side, the inclined guide section extends toward the guide slope, and the end of the inclined guide section is provided corresponding to the starting end of the guide slope.
13. The lithium battery coating die head according to any one of claims 1 to 5, characterized in that, A gasket (20) is provided between the upper mold (30) and the lower mold (10). The gasket (20) has a U-shaped structure and its opening faces the discharge port. The upper mold (30), the gasket (20), and the lower mold (10) are fixedly connected and form a sealed fit.
14. The lithium battery coating die head according to claim 13, characterized in that, The middle area of the gasket (20) is provided with a dividing strip, which extends toward the discharge port and divides the discharge port into multiple parts.
15. The lithium battery coating die head according to claim 13, characterized in that, Both the upper mold (30) and the lower mold (10) include inclined guide surfaces. The gasket (20) includes an inclined support section. The structure of the inclined support section is adapted to the gap formed by the inclined guide surfaces of the upper mold (30) and the lower mold (10). The upper mold (30), the lower mold (10) and the gasket (20) form a flow channel (50). The flow channel (50) includes an inclined guide section. The inclined guide section is located on the material receiving side of the fixed block (4061) and its height increases along the direction close to the fixed block (4061).
16. A coating apparatus, comprising a lithium battery coating die, characterized in that, The lithium battery coating die head is the lithium battery coating die head according to any one of claims 1 to 15.