Anti-slip high-precision coating device
By combining the pressure roller and back roller and using a movable coating roller design, the slippage problem of lithium battery separator substrate during high-speed operation is solved, achieving accuracy in coating position and uniformity in thickness, thereby improving the coating quality of lithium battery separator and the process adaptability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-03-24
AI Technical Summary
Lithium-ion battery separator substrates are prone to slippage during high-speed operation, which can lead to coating position displacement and uneven thickness, affecting the consistency of ion permeability of the separator and battery safety performance.
The pressure roller and back roller work together, and the clamping force is adjusted by moving the pressure roller up and down. Combined with the movable coating roller design and the gap adjustment mechanism, the roller gap can be precisely adjusted to ensure the synchronous transmission of the diaphragm substrate and the back roller and the coating accuracy.
It effectively prevents the membrane substrate from slipping during high-speed operation, ensures the accuracy of coating position and thickness uniformity, and improves the process adaptability of the equipment and the coating quality.
Smart Images
Figure CN224025458U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of lithium battery separator, in particular to an anti-slip high-precision coating device. BACKGROUND
[0002] In the field of lithium battery separator manufacturing, coating equipment usually adopts a direct coating technology with an anilox roller to perform surface treatment on the separator substrate. A typical structure includes an anilox roller, a back roller and a substrate conveying system. The functional coating is transferred to the surface of the separator substrate by the contact between the anilox roller dipped with coating and the moving separator substrate. In this process, the conveying of the separator substrate is driven by the rotational friction force of the back roller, and the coating precision depends on the stability of the contact pressure between the anilox roller and the substrate.
[0003] Due to the smooth surface of the lithium battery separator substrate, only the friction force between the substrate and the back roller is used for transmission in the traditional equipment, which is easy to slip at high speed or when the tension fluctuates. Such slippage will cause the position deviation or thickness unevenness of the coating, which seriously affects the ion permeability consistency of the separator and further reduces the safety performance of the battery. CONTENT OF THE INVENTION
[0004] In order to reduce the possibility of slippage of the separator substrate during coating and further improve the coating quality, the present application provides an anti-slip high-precision coating device.
[0005] The anti-slip high-precision coating device provided by the present application adopts the following technical solution:
[0006] An anti-slip high-precision coating device comprises:
[0007] a rack;
[0008] a back roller arranged on the rack and used for driving the continuous movement of the separator substrate;
[0009] a compression roller movably installed on the rack and used for compressing the separator substrate on the surface of the back roller;
[0010] a coating roller movably arranged on the rack and used for coating glue on the surface of the separator substrate.
[0011] By adopting the above technical solution, the compression roller and the back roller cooperate with each other, the compression force is adjusted by the up-and-down movement of the compression roller, the slippage problem of the separator substrate at high speed is effectively prevented, the transmission synchronization of the separator substrate and the back roller is ensured, and the coating position deviation and thickness unevenness are avoided. At the same time, the movable design of the coating roller can adapt to different coating trajectories and glue pattern requirements, and the process adaptability of the equipment is improved.
[0012] Optionally, the coating roller is a dot coating roller, and a dot coating protrusion is arranged on a surface of the dot coating roller.
[0013] Optionally, a second base is arranged on the first base, and the second base is movably arranged on the first base, and a pattern roller is arranged on the second base, and a glue temporary storage groove is arranged on a surface of the pattern roller.
[0014] By adopting the above technical scheme, the left and right movement function of the first base allows the dot coating roller to be adjusted in the transverse direction, so as to match different width substrates or complex coating layout requirements. In addition, the glue temporary storage groove of the pattern roller is convenient for taking away and accommodating glue, and when the pattern roller is in contact with the dot coating roller, the dot coating roller can be continuously supplied with glue required for coating. The independent movement function of the second base allows the contact pressure between the pattern roller and the dot coating roller to be adjusted, so as to adapt to the transfer requirements of glue with different viscosities and prevent glue from splashing due to excessive extrusion.
[0015] Optionally, a third base is arranged on the second base, and the third base is movably arranged on the second base, and a glue tank for storing glue is arranged on the third base, and an opening of the glue tank is arranged to face the pattern roller.
[0016] By adopting the above technical scheme, the glue tank is dynamically aligned with the pattern roller through the third base, so as to ensure that the glue is continuously and stably supplied to the surface of the pattern roller, and avoid coating defects caused by glue supply interruption. The design that the opening of the glue tank faces the pattern roller optimizes the glue flow direction, reduces glue wall hanging and residue, and reduces cleaning frequency and maintenance cost.
[0017] Optionally, the rack is provided with a first gap adjusting mechanism for adjusting the gap between the pressure roller and the backing roller.
[0018] Optionally, the rack is provided with a second gap adjusting mechanism for adjusting the gap between the coating roller and the backing roller.
[0019] Optionally, the rack is provided with a third gap adjusting mechanism for adjusting the gap between the pattern roller and the dot coating roller.
[0020] By adopting the above technical scheme, the gap between the rollers is adjusted through the first gap adjusting mechanism, the second gap adjusting mechanism and the third gap adjusting mechanism, so that the coating device is applicable to substrates with different thicknesses, and the sliding of the substrate caused by too large gap or the indentation defect caused by too small gap is eliminated, and the coating quality is improved.
[0021] Optionally, the first gap adjusting mechanism comprises a driving module, a transmission module and a displacement amplification module, the driving module drives the displacement amplification module to move through the transmission module, and the displacement amplification module is connected with a bearing seat of the pressure roller.
[0022] Optionally, the driving module comprises a servo motor and a speed reducer connected with the servo motor, the transmission module comprises a lead screw connected with an output end of the speed reducer and a sliding block threadedly engaged with the lead screw, the displacement amplification module comprises first and second inclined blocks, the inclined surfaces of the first and second inclined blocks are oppositely arranged, the first inclined block is connected with the sliding block, and the second inclined block is connected with a bearing seat of the compression roller, and the bearing seat of the compression roller is further connected with an elastic reset member.
[0023] By adopting the technical scheme, high-torque output of the servo motor and the speed reducer ensures stability of lead screw transmission, and the sliding block and the first inclined block are designed to reduce axial movement of the lead screw in proportion and convert it into radial precise displacement through geometric displacement amplification principle. In use, the servo motor drives the lead screw to move the sliding block linearly, and the first and second inclined blocks and the elastic reset member are cooperated to realize bidirectional displacement adjustment: when the sliding block moves in a preset first direction, the second inclined block is extruded by the first inclined block to push the bearing seat of the compression roller to move outward to increase the gap; when the sliding block moves in a preset second direction, the elastic reset member releases the pre-tightening force to drive the bearing seat of the compression roller to reversely reset to reduce the gap between the two rollers, so as to realize precise adjustment of the gap between the compression roller and the back roller.
[0024] In summary, the application has the following beneficial technical effects:
[0025] 1. The application adjusts the compression force by the up-down movement of the compression roller through the cooperation of the compression roller and the back roller, effectively prevents the slip of the ultra-thin diaphragm substrate during high-speed operation, ensures the transmission synchronization of the diaphragm substrate and the back roller, thereby avoiding the deviation of the coating position and the uneven thickness; at the same time, the movable design of the coating roller can adapt to different coating trajectories and glue pattern requirements, and improves the process adaptability of the equipment. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 is a schematic view of the overall structure of an anti-slip high-precision coating device according to an embodiment of the application.
[0027] Figure 2 is a schematic view of the structure of the point coating roller and the anilox roller according to an embodiment of the application.
[0028] Figure 3 is a schematic view of the first gap adjusting mechanism according to an embodiment of the application.
[0029] Explanation of reference signs: 1, rack; 11, guide roller; 12, first base; 13, second base; 14, third base; 2, back roller; 3, compression roller; 4, dotting roller; 41, dotting protrusion; 5, anilox roller; 51, temporary glue storage groove; 6, material groove; 7, first gap adjusting mechanism; 71, driving module; 711, servo motor; 712, speed reducer; 72, transmission module; 721, screw rod; 722, sliding block; 73, displacement amplification module; 731, first inclined block; 732, second inclined block; 8, second gap adjusting mechanism; 9, third gap adjusting mechanism. DETAILED DESCRIPTION
[0030] The following Figures 1-3 , the application is further described in detail.
[0031] Embodiment:
[0032] The embodiment of the application discloses an anti-slip high-precision coating device. Referring to Figure 1 , an anti-slip high-precision coating device, comprising a rack 1, a back roller 2 and a plurality of guide rollers 11 rotatably installed on the rack 1, in use, the diaphragm substrate passes through the back roller 2 and the plurality of guide rollers 11, and the back roller 2 is used to drive the diaphragm substrate to move continuously. A coating roller is movably arranged on the rack 1 and used to coat glue onto the surface of the diaphragm substrate. In order to realize dynamic compression of the diaphragm substrate, a compression roller 3 is movably installed on the rack 1 and used to compress the diaphragm substrate onto the surface of the back roller 2.
[0033] When the coating device is used, the compression roller 3 adjusts the compression force on the diaphragm substrate by moving up and down, eliminates the slip problem caused by insufficient friction between the substrate and the back roller 2 in the traditional device, ensures the absolute synchronization of the diaphragm substrate and the back roller 2 during the coating process, and thus improves the defects of coating deviation and uneven thickness. Meanwhile, the mobility of the coating roller can flexibly adapt to different coating paths and pattern design requirements, and improves the compatibility of the device to different processes.
[0034] Referring to Figure 1 and Figure 2 , the coating roller is a dotting roller 4, the surface of the dotting roller 4 is integrally formed with a dotting protrusion 41, and the dotting roller 4 is movably arranged on the rack 1 through the first base 12; the first base 12 is further provided with a second base 13, the second base 13 is movably installed on the first base 12, and the anilox roller 5 is rotatably installed on the second base 13, and the surface of the anilox roller 5 is densely provided with temporary glue storage grooves 51.
[0035] When in use, the left and right movement function of the first base 12 allows the lateral position of the dotting roller 4 to be adjusted, which facilitates matching different width substrates or complex coating layout requirements. In addition, the glue temporary storage groove 51 of the anilox roller 5 facilitates the taking away and containing of glue, and when in contact with the dotting roller 4, it can continuously supply the dotting roller 4 with the glue required for coating; the independent movement function of the second base 13 makes the contact pressure of the anilox roller 5 and the dotting roller 4 adjustable, which can not only adapt to the transfer requirements of glue with different viscosities, but also prevent excessive extrusion from causing glue splashing.
[0036] With reference to Figure 1 , the third base 14 is further arranged on the second base 13, the third base 14 is movably arranged on the second base 13, and the tank 6 for storing glue is arranged on the third base 14, and the opening of the tank 6 is arranged towards the anilox roller 5. In this way, the tank 6 is dynamically aligned with the anilox roller 5 through the third base 14, which ensures that the glue solution is continuously and stably supplied to the surface of the anilox roller 5, avoids coating breakpoints or thickness fluctuations caused by glue supply interruption, and the design of the opening of the tank 6 towards the anilox roller 5 makes the glue solution flow direction coordinate with the rotation direction of the anilox roller 5, reduces the wall hanging residue caused by glue solution backflow, reduces glue waste and cleaning frequency, and the mobility of the tank 6 facilitates quick replacement of different types of glue, improving the efficiency of production line change.
[0037] With reference to Figure 1 , the first gap adjusting mechanism 7, the second gap adjusting mechanism 8 and the third gap adjusting mechanism 9 are arranged on the rack 1, and are respectively used for adjusting the gap between the compression roller 3 and the back roller 2, the gap between the coating roller and the back roller 2, and the gap between the anilox roller 5 and the dotting roller 4. Through the arrangement of the first gap adjusting mechanism 7, the second gap adjusting mechanism 8 and the third gap adjusting mechanism 9, the gap adjustment between the rollers is realized, so that the coating device is suitable for different thickness of the membrane substrate, eliminates the sliding of the substrate caused by the too large gap or the indentation defect caused by the too small gap, and improves the coating quality.
[0038] With reference to Figure 1 and Figure 3 , the first gap adjusting mechanism 7 includes a driving module 71, a transmission module 72 and a displacement amplification module 73, the driving module 71 drives the displacement amplification module 73 to move through the transmission module 72, and the displacement amplification module 73 is connected with the bearing seat of the compression roller 3.
[0039] Specifically, the driving module 71 comprises a servo motor 711 and a speed reducer 712 connected with the output end of the servo motor 711, the transmission module 72 comprises a lead screw 721 connected with the output end of the speed reducer 712 and a sliding block 722 threadedly matched with the lead screw 721, the displacement amplification module 73 comprises a first inclined block 731 and a second inclined block 732, the inclined surfaces of the first inclined block 731 and the second inclined block 732 are reversely abutted, the first inclined block 731 is fixed with the sliding block 722, the second inclined block 732 is connected with the bearing seat of the compression roller 3, and the bearing seat of the compression roller 3 is further connected with an elastic reset member, so that the inclined surface of the second inclined block 732 always abuts against the inclined surface of the first inclined block 731. In the embodiment, the elastic reset member is a spring. In this way, the high-torque output of the servo motor 711 and the speed reducer 712 ensures the stability of the transmission of the lead screw 721, and the design of the sliding block 722 and the first inclined block 731 converts the axial movement of the lead screw 721 into radial precise displacement by the geometric displacement amplification principle.
[0040] In use, the servo motor 711 drives the lead screw 721 to drive the sliding block 722 to move linearly, and the servo motor 711, the speed reducer 712, the sliding block 722, the first inclined block 731, the second inclined block 732 and the elastic reset member cooperatively realize bidirectional displacement adjustment: when the sliding block 722 moves in a preset first direction, the second inclined block 732 is extruded by the first inclined block 731, and the bearing seat of the compression roller 3 is pushed outwards to increase the gap; when the sliding block 722 moves in a preset second direction, the elastic reset member releases the pre-tightening force to drive the bearing seat of the compression roller 3 to reversely reset to reduce the gap between the two rollers, thereby achieving the purpose of precisely adjusting the gap between the compression roller 3 and the back roller 2.
[0041] In the embodiment, the second gap adjusting mechanism 8 and the third gap adjusting mechanism 9 have similar structures to the first gap adjusting mechanism 7, and details are not repeated here.
[0042] The implementation principle of the anti-slip high-precision coating device in the embodiment is as follows: when working, the back roller 2 and the guide roller 11 rotate to drive the diaphragm substrate to move in a predetermined direction, the compression roller 3 is moved upwards until it contacts the diaphragm substrate, and the diaphragm substrate is pressed against the back roller 2 to prevent the diaphragm substrate from slipping on the back roller 2. The trough 6 is slid to the right on the third base 14 to contact the anilox roller 5, and the glue on the trough 6 is coated on the anilox roller 5. As the anilox roller 5 rotates, the glue is distributed on the surface of the anilox roller 5. The anilox roller 5 is moved to the right on the second base 13 to contact the point coating roller 4, and the glue on the surface of the anilox roller 5 is coated on the point coating roller 4. As the point coating roller 4 rotates, the glue is distributed on the surface of the point coating roller 4. The point coating roller 4 is moved to the right on the first base 12 to contact the diaphragm substrate and press the diaphragm substrate against the back roller 2, and the glue on the surface of the point coating roller 4 is coated on the diaphragm substrate. At this time, the diaphragm substrate continues to move in the predetermined direction, and the point coating roller 4 rotates, so that the glue on the surface of the point coating roller 4 is continuously coated on the surface of the diaphragm substrate, and the coating process is completed.
[0043] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.
Claims
1. A high-precision anti-slip coating device, characterized in that, include: Rack (1); Back roller (2), mounted on the frame (1), is used to drive the diaphragm substrate to move continuously; The pressure roller (3) is mounted on the frame (1) in a way that can move up and down, and is used to press the diaphragm substrate onto the surface of the back roller (2); A coating roller, movably mounted on the frame (1), is used to coat adhesive onto the surface of the diaphragm substrate.
2. The anti-slip high-precision coating device according to claim 1, characterized in that: The coating roller is a dotting roller (4), and the surface of the dotting roller (4) is provided with dotting protrusions (41). The dotting roller (4) is mounted on the frame (1) and can be moved left and right by the first base (12).
3. The anti-slip high-precision coating device according to claim 2, characterized in that: The first base (12) is provided with a second base (13), which is movably mounted on the first base (12) and is provided with an anilox roller (5). The surface of the anilox roller (5) is provided with a glue storage groove (51).
4. The anti-slip high-precision coating device according to claim 3, characterized in that: The second base (13) is provided with a third base (14), which is movably mounted on the second base (13). The third base (14) is provided with a material trough (6) for storing glue, and the opening of the material trough (6) is set towards the anilox roller (5).
5. The anti-slip high-precision coating device according to claim 1, characterized in that: The frame (1) is provided with a first gap adjustment mechanism (7) for adjusting the gap between the pressure roller (3) and the back roller (2).
6. The anti-slip high-precision coating device according to claim 1, characterized in that: The frame (1) is provided with a second gap adjustment mechanism (8) for adjusting the gap between the coating roller and the back roller (2).
7. The anti-slip high-precision coating device according to claim 3, characterized in that: The frame (1) is provided with a third gap adjustment mechanism (9) for adjusting the gap between the anilox roller (5) and the dotting roller (4).
8. The anti-slip high-precision coating device according to claim 5, characterized in that: The first gap adjustment mechanism (7) includes a drive module (71), a transmission module (72) and a displacement amplification module (73). The drive module (71) drives the displacement amplification module (73) to move through the transmission module (72). The displacement amplification module (73) is connected to the bearing seat of the pressure roller (3).
9. The anti-slip high-precision coating device according to claim 8, characterized in that: The drive module (71) includes a servo motor (711) and a reducer (712) connected to the servo motor (711). The transmission module (72) includes a lead screw (721) connected to the output end of the reducer (712) and a slider (722) threadedly engaged with the lead screw (721). The displacement amplification module (73) includes a first inclined block (731) and a second inclined block (732). The inclined surfaces of the first inclined block (731) and the second inclined block (732) are arranged in opposite directions. The first inclined block (731) is connected to the slider (722). The second inclined block (732) is connected to the bearing seat of the pressure roller (3). The bearing seat of the pressure roller (3) is also connected to an elastic reset member.