Double-station gap coating device for lithium battery

Abstract

The utility model discloses a lithium battery double-station clearance coating device, including frame and install the roller mechanism and coating mechanism on the frame, the both sides of roller mechanism are provided with the coating mechanism, coating mechanism include intaglio roller subassembly, back and forth moving subassembly, scraper adjusting subassembly and magazine elevating subassembly, and the intaglio roller subassembly is provided with the intaglio roller subassembly, back and forth moving subassembly, scraper adjusting subassembly and magazine elevating subassembly. The gravure roller assembly and the scraper adjusting assembly are both arranged on the front-back moving assembly, the front-back moving assembly is used for driving the coating mechanism to move front and back, the gravure roller assembly comprises a gravure roller and coating rollers, the coating rollers are arranged on the two sides of the roller passing mechanism and tangent to the gravure roller, and the coating rollers are arranged on the two sides of the roller passing mechanism. The scraper adjusting assembly abuts against the gravure roller, and the material box lifting assembly is arranged at the lower end of the gravure roller. According to the gap coating device, gap coating and secondary overprinting are integrated, more customer requirements are met, the length of a blank area in the middle of the foil can be adjusted at will, the device is easy and fast to debug, and the production efficiency is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of coating technology, specifically to a dual-station gap coating device for lithium batteries. Background Technology

[0002] Existing coating equipment has only one coating station. During gap coating, the gravure roller is driven by a drive mechanism to move back and forth towards or away from the electrode. Coating is performed when the roller is close to the electrode and the coating is interrupted when the roller is far away from the electrode, thus achieving gap coating of the electrode. However, since the operating frequency of the drive mechanism is usually fixed, when the length of the blank area of ​​the electrode is small, the belt speed of the electrode needs to be reduced to ensure that the time for the electrode to pass through the gap is sufficient for the drive mechanism to drive the gravure roller to perform one reciprocating movement, resulting in low production efficiency. If a secondary overprint coating is used to achieve the gap coating spacing, two coating operations are required, which also results in low production efficiency. Furthermore, the secondary coating process is not only costly, inefficient, and time-consuming, but also prone to foil scrapping during the two coating unwinding and rewinding processes, resulting in wasted additional costs.

[0003] Therefore, there is a need to provide a dual-station gap coating device for lithium batteries to solve the above problems. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a dual-station gap coating device for lithium batteries, which integrates gap coating and secondary overprinting into one unit, meeting more customer needs. It also allows for easy adjustment of the length of the blank area in the middle of the foil, and the device is simple and quick to debug, effectively improving production efficiency.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A dual-station gap coating apparatus for lithium batteries includes a frame and a roller conveying mechanism and a coating mechanism mounted on the frame. The coating mechanism is located on both sides of the roller conveying mechanism. Each coating mechanism includes a gravure roller assembly, a forward and backward moving assembly, a doctor blade adjusting assembly, and a material box lifting assembly. The gravure roller assembly and the doctor blade adjusting assembly are both mounted on the forward and backward moving assembly, which drives them to move back and forth. The gravure roller assembly includes a gravure roller and a coating roller. The coating roller is located on both sides of the roller conveying mechanism and is tangent to the gravure roller. The doctor blade adjusting assembly abuts against the gravure roller. The material box lifting assembly is located at the lower end of the gravure roller and provides slurry to the gravure roller. The doctor blade adjusting assembly evenly distributes the slurry on the gravure roller.

[0007] As a further improvement to the above technical solution, the forward and backward moving assembly includes a mounting base plate, a linear motor, forward and backward moving guide rails, a cable chain, and a movable mounting plate. The linear motor and the forward and backward moving guide rails are connected between the mounting base plate and the movable mounting plate, and the forward and backward moving guide rails are disposed on both sides of the linear motor. The cable chain is disposed on the outer end of the movable mounting plate, and one end of the cable chain is connected to the mounting base plate, and the other end of the cable chain is connected to the movable mounting plate.

[0008] As a further improvement to the above technical solution, the gravure roller assembly further includes a drive motor, a bearing support, a first mounting plate, a first transverse guide rail, and a lead screw drive assembly. The first mounting plate is slidably connected to the movable mounting plate via the first transverse guide rail. Both ends of the gravure roller are fixedly connected to the first mounting plate via the bearing support. The drive motor is mounted on the upper end of the first mounting plate, and one end of the gravure roller is connected to the drive motor. The lead screw drive assembly is mounted on the movable mounting plate and is used to drive the gravure roller to move along the first transverse guide rail.

[0009] As a further improvement to the above technical solution, the lead screw drive assembly includes a lead screw, a sliding pair, a bearing mounting base, and a handwheel. The two ends of the lead screw are mounted on the movable mounting plate through the bearing mounting base. The sliding pair is sleeved on the lead screw and is fixedly connected to the first mounting plate. The handwheel is connected to one end of the lead screw.

[0010] As a further improvement to the above technical solution, the scraper adjustment assembly includes a scraper, a scraper moving seat, a scraper flipping assembly, a linear sliding platform, a second mounting plate, a connecting seat, a second transverse guide rail, a moving connecting block, and a scraper translation drive assembly. The scraper abuts against the gravure roller. Both ends of the scraper are connected to the scraper moving seat. The scraper moving seat is connected to the linear sliding platform, which is fixed to the connecting seat. The scraper flipping assembly is connected to the inner end of the scraper moving seat and to the middle of the scraper. The second mounting plate is slidably connected to the moving mounting plate via the second transverse guide rail. The connecting seat is fixed to the second mounting plate. The scraper translation drive assembly is mounted on the moving mounting plate, and the drive end of the scraper translation drive assembly is connected to the second mounting plate via the moving connecting block.

[0011] As a further improvement to the above technical solution, the scraper flipping assembly includes a cylinder, a cylinder fixing pin, a cylinder base, a rotating connector, and a scraper fixing double ear seat. The scraper fixing double ear seat is fixedly connected to the scraper. One end of the rotating connector is hinged to the scraper fixing double ear seat, and the other end of the rotating connector is connected to the protruding end of the cylinder. The cylinder fixing pin is fixedly connected to the inner side of the scraper moving seat. The cylinder base is hinged to one end of the cylinder fixing pin, and the cylinder is fixedly mounted on the cylinder base.

[0012] As a further improvement to the above technical solution, the scraper translation drive assembly includes a stepper motor, an eccentric rotating shaft, a bearing, and a motor mounting base. The stepper motor is fixed to the movable mounting plate through the motor mounting base. The eccentric rotating shaft is connected to the drive end of the stepper motor, and the bearing is sleeved on the eccentric rotating shaft. The bearing is fixedly installed at one end of the movable connecting block.

[0013] As a further improvement to the above technical solution, the material box lifting assembly includes a material tray, a lifting rack, a rotating shaft, a moving worm gear, a lifting handwheel, and a support block. The material tray is located below the gravure roller, and the lifting rack is connected to both ends of the material tray. The lifting handwheel is connected to one end of the moving worm gear. A drive gear and a transmission gear are sleeved on the rotating shaft. The drive gear meshes with the moving worm gear, and the transmission gear meshes with the lifting rack. A fixing block is provided at the connection between the transmission gear and the lifting rack. The support block is connected to the fixing block and is fixedly connected to the frame.

[0014] As a further improvement to the above technical solution, the roller passing mechanism is also provided with a color mark sensor assembly, which is arranged in parallel on both sides of the roller passing mechanism.

[0015] As a further improvement to the above technical solution, the gap coating device is also provided with a receiving tray, a drive electrical box and an operating electrical box. The receiving tray is horizontally arranged at the bottom of the frame, the drive electrical box is arranged at one end of the frame, and the operating electrical box is arranged on the other side of the frame.

[0016] The beneficial effects of this utility model are:

[0017] This invention integrates two coating stations by setting coating mechanisms on both sides of the roller mechanism, thus combining gap coating and secondary overprinting into one unit. This meets more customer needs. When producing gap coating alone, the two coating stations can coat the same paste simultaneously, increasing the gap between the first coatings and reducing the impact of motor response speed on coating speed, thereby achieving high-speed gap coating. When performing secondary overprinting coating, the two stations coat different pastes, and the secondary overprinting can be completed in one go, reducing the number of unwinding and rewinding operations, reducing the difficulty of alignment in the secondary overprinting coating area, improving equipment debugging efficiency, reducing energy loss, and increasing production efficiency. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the intermittent coating device of this utility model;

[0020] Figure 2 This is a front view structural schematic diagram of the gap coating device of this utility model;

[0021] Figure 3 yes Figure 2 A cross-sectional view along the AA direction;

[0022] Figure 4 This is a schematic diagram of the coating mechanism of this utility model;

[0023] Figure 5 This is a schematic diagram of the gravure roller assembly of this utility model;

[0024] Figure 6 This is a schematic diagram of the scraper adjustment assembly of this utility model;

[0025] Figure 7 yes Figure 6 Enlarged view of point A in the middle;

[0026] Figure 8 yes Figure 6 Enlarged view of point B in the middle;

[0027] Figure 9 This is a structural schematic diagram of the material box lifting assembly of this utility model.

[0028] Reference numerals: 1. Frame; 2. Roller mechanism; 21. Coating roller; 3. Coating mechanism; 4. Gravure roller assembly; 41. Gravure roller; 42. Drive motor; 43. Bearing support seat; 44. First mounting plate; 441. Scale; 45. Transverse guide rail one; 46. Screw drive assembly; 461. Screw; 462. Sliding pair; 463. Bearing fixing seat; 464. Handwheel; 5. Forward and backward moving assembly; 51. Mounting base plate; 52. Linear motor; 53. Forward and backward moving guide rail; 54. Cable chain; 55. Moving mounting plate; 6. Scraper adjustment assembly; 61. Scraper; 62. Scraper moving seat; 63. Scraper flipping assembly; 631. Cylinder; 632. Cylinder fixing pin; 633. Cylinder base; 634. Rotary connector; 635. Scraper fixing double ear seat; 64. Linear sliding platform; 65. Second mounting plate; 66. Connecting seat; 67. Second transverse guide rail; 68. Moving connecting block; 69. Scraper translation drive assembly; 691. Stepper motor; 692. Eccentric rotating shaft; 693. Bearing; 694. Motor mounting seat; 7. Material box lifting assembly; 71. Material tray; 72. Lifting rack; 73. Rotating shaft; 74. Moving worm gear; 75. Lifting handwheel; 76. Support block; 77. Drive gear; 78. Transmission gear; 79. Fixing block; 8. Color mark sensor assembly; 9. Receiving tray; 10. Drive electrical box; 11. Operation electrical box. Detailed Implementation

[0029] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / connections involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / fixed installations can use screw connections, bolt connections, pin connections, key connections, adhesive connections, mortise and tenon connections, welding, riveting, etc., as needed. For detachable connections, screw connections, bolt connections, threaded connections, snap-fit ​​connections, mortise and tenon connections, Velcro connections, etc., can be used as needed. The various technical features in this utility model can be combined interactively without contradicting each other.

[0030] Reference Figures 1-3A dual-station gap coating device for lithium batteries includes a frame 1, a roller conveying mechanism 2, and a coating mechanism 3. The roller conveying mechanism 2 is located in the middle of the frame 1 and is used to pull the coating foil. The coating mechanism 3 is located on both sides of the roller conveying mechanism 2, forming two coating stations, which can realize both gap coating and secondary overprint coating to meet more customer needs. The coating mechanism 3 includes a gravure roller assembly 4, a front-back moving assembly 5, a doctor blade adjusting assembly 6, and a material box lifting assembly 7. The gravure roller... Component 4 includes a gravure roller 41 and a coating roller 21. The coating roller 21 is disposed on both sides of the roller-passing mechanism 2, and the gravure roller 41 and the coating roller 21 are parallel and tangential. During coating, the foil is introduced from the roller-passing mechanism 2 onto the coating roller 21, and then passes between the coating roller 21 and the gravure roller 41. The gravure roller 41 can effectively coat the foil with the slurry. At the same time, the doctor blade adjusting component 6 abuts against the gravure roller 41, and the material box lifting component 7 is disposed at the lower end of the gravure roller 41. A paste is placed in a tray. The gravure roller 41 rotates to form a paste coating. The paste on the gravure roller 41 is then evenly scraped by the doctor blade adjusting component 6 to ensure uniform foil coating. Both the gravure roller assembly 4 and the doctor blade adjusting component 6 are mounted on the front-back moving component 5. The front-back moving component 5 can drive the gravure roller 41 to move back and forth. When coating is required, the front-back moving component 5 drives the gravure roller assembly 4 and the doctor blade adjusting component 6 to simultaneously approach the coating roller 21, so that the gravure roller 41 and the coating roller 21 clamp the foil for coating. When coating is required, the forward and backward moving component 5 drives the gravure roller component 4 and the doctor blade adjusting component 6 to move away from the coating roller 21 simultaneously, leaving a blank area on the foil, thereby achieving intermittent coating. In addition, the length of the intermediate blank area can be adjusted at will by controlling the reaction time of the forward and backward moving component 5, which is suitable for customers' multi-process production. It is also equipped with dual-station coating, which can set the same paste in both stations to achieve high-speed intermittent coating, or set different pastes to achieve secondary overprinting of foil coating, resulting in high production efficiency and convenient and quick debugging.

[0031] Reference Figure 4 , Figure 5In an embodiment of this utility model, the forward and backward moving assembly 5 includes a mounting base plate 51, a linear motor 52, forward and backward moving guide rails 53, a cable chain 54, and a movable mounting plate 55. The linear motor 52 and the forward and backward moving guide rails 53 are connected between the mounting base plate 51 and the movable mounting plate 55. The forward and backward moving guide rails 53 are disposed on both sides of the linear motor 52. The linear motor 52 includes a stator and a mover. The forward and backward moving guide rails 53 include a slide rail and a slider. The stator and the slide rail are fixedly connected to the mounting base plate 51, and the mover and the slider are fixedly connected to the movable mounting plate 55. When the linear motor 52 drives the movement, the mover slides on the stator, and at the same time drives the movable mounting plate 55 to slide along the front and rear moving guide rails 53. The gravure roller assembly 4 and the doctor blade adjustment assembly 6 are installed on the upper end of the movable mounting plate 55, thereby realizing the front and rear movement of the gravure roller 41, and thus realizing the adjustment of the length of the blank area on the foil. The drag chain 54 is set on the outer end of the movable mounting plate 55, and one end of the drag chain 54 is connected to the mounting base plate 51, and the other end is connected to the movable mounting plate 55, ensuring that the drag chain 54 protects the wires or air pipes from damage when the coating mechanism 3 moves back and forth.

[0032] Reference Figure 5 , Figure 6 , Figure 8 In an embodiment of this utility model, the gravure roller assembly 4 further includes a drive motor 42, a bearing support 43, a first mounting plate 44, a transverse guide rail 45, and a lead screw drive assembly 46. The first mounting plate 44 is slidably connected to the movable mounting plate 55 via the transverse guide rail 45, allowing the gravure roller assembly 4 to be mounted on the upper end of the front-rear moving assembly 5, thus enabling the gravure roller 41 to move back and forth. Both ends of the gravure roller 41 are fixedly connected to the first mounting plate 44 via the bearing support 43. The drive motor 42 is mounted on the upper end of the first mounting plate 44, and one end of the gravure roller 41 is connected to the drive motor 42, enabling the gravure roller 41 to perform... The screw drive assembly 46 is mounted on the movable mounting plate 55 and is used to drive the gravure roller 41 to move along the transverse guide rail 45. The position of the gravure roller 41 can be adjusted to achieve different coating requirements. In addition, the upper end of the bearing support seat 43 is provided with an open slot, and a pressure block is provided on the open slot. One end of the pressure block is rotatably connected to one end of the open slot. The rotating bearings connected to both ends of the gravure roller 41 are engaged in the open slot. The pressure block presses on the upper end of the rotating bearing and is fixed in the bearing support seat 43 by fastening screws passing through the other end of the pressure block, thus fixing the gravure roller 41 and making it easier to replace and maintain the gravure roller 41.

[0033] Specifically, the lead screw drive assembly 46 includes a lead screw 461, a sliding pair 462, a bearing mounting seat 463, and a handwheel 464. Both ends of the lead screw 461 are mounted on the movable mounting plate 55 via the bearing mounting seat 463. The sliding pair 462 is sleeved on the lead screw 461 and is fixedly connected to the first mounting plate 44. The handwheel 464 is connected to one end of the lead screw 461. By rotating the handwheel 464, the lead screw 461 is rotated, which in turn drives the sliding pair 462 to move the first mounting plate 44 left and right along the transverse guide rail 45. In addition, a scale 441 is provided on the first mounting plate 44, and a pointer is provided on the bearing mounting seat 463 at one end of the lead screw 461 to accurately determine the distance the gravure roller 41 moves, so as to achieve rapid adjustment.

[0034] Reference Figure 6 , Figure 7 In an embodiment of this utility model, the scraper adjustment assembly 6 includes a scraper 61, a scraper moving seat 62, a scraper flipping assembly 63, a linear sliding platform 64, a second mounting plate 65, a connecting seat 66, a transverse guide rail 67, a moving connecting block 68, and a scraper translation drive assembly 69. The scraper 61 abuts against the gravure roller 41 to evenly distribute the slurry on the gravure roller 41. Both ends of the scraper 61 are connected to the scraper moving seat 62, which is connected to the linear sliding platform 64. The distance between the scraper 61 and the gravure roller 41 can be adjusted via the linear sliding platform 64, thereby adjusting the thickness of the slurry coating. The linear sliding platform 64 is fixed to the connecting seat 66, and the scraper flipping assembly 63 is connected to the connecting seat 67. The inner end of the scraper moving seat 62 is connected to the middle of the scraper 61, and the scraper flipping assembly 63 is connected to the middle of the scraper 61. The scraper 61 can be controlled to abut or not abut against the gravure roller 41 through the scraper flipping assembly 63. The second mounting plate 65 is slidably connected to the movable mounting plate 55 through the transverse guide rail 67. The connecting seat 66 is fixed on the second mounting plate 65. The scraper translation drive assembly 69 is mounted on the movable mounting plate 55, and the drive end of the scraper translation drive assembly 69 is connected to the second mounting plate 65 through the movable connecting block 68. This allows the motor of the scraper translation drive assembly 69 to rotate and drive the movable connecting block 68 to move, thereby driving the scraper adjusting assembly 6 to move left and right, so as to ensure that the scraper 61 can evenly distribute the slurry on the entire gravure roller 41.

[0035] Specifically, the scraper flipping assembly 63 includes a cylinder 631, a cylinder fixing pin 632, a cylinder base 633, a rotating connector 634, and a scraper fixing double-ear seat 635. The scraper fixing double-ear seat 635 is fixedly connected to the scraper 61. The rotating connector 634 has an L-shaped structure; one end of the rotating connector 634 is hinged to the scraper fixing double-ear seat 635, and the other end is connected to the extended end of the cylinder 631. Both ends of the scraper 61 are connected to the cylinder base 632. The scraper moving seat 62 is rotatably connected, and the scraper 61 can be flipped by the extension and retraction of the cylinder 631. This can quickly and evenly distribute the paste on the gravure roller 41, and facilitate the installation and replacement of the gravure roller 41, making debugging convenient and quick. At the same time, the cylinder fixing pin 632 is fixedly connected to the inner side of the scraper moving seat 62, and the cylinder base 633 is hinged to one end of the cylinder fixing pin 632. The cylinder 631 is fixedly installed on the cylinder base 633 to fix the cylinder 631.

[0036] Specifically, the scraper translation drive assembly 69 includes a stepper motor 691, an eccentric rotating shaft 692, a bearing 693, and a motor mounting base 694. The stepper motor 691 is fixed to the movable mounting plate 55 via the motor mounting base 694. The eccentric rotating shaft 692 is connected to the drive end of the stepper motor 691, and the bearing 693 is sleeved on the eccentric rotating shaft 692. One end of the movable connecting block 68 is provided with a mounting groove, and the bearing 693 is connected in the mounting groove. The stepper motor 691 drives the eccentric rotating shaft 692 to rotate, thereby driving the movable connecting block 68 to move left and right, thus realizing the left and right movement of the scraper 61.

[0037] Reference Figure 4 , Figure 9In an embodiment of this utility model, the material box lifting assembly 7 includes a material tray 71, a lifting rack 72, a rotating shaft 73, a moving worm gear 74, a lifting handwheel 75, and a support block 76. The material tray 71 is positioned below the gravure roller 41 and contains slurry; the gravure roller 41 rotates to pick up the slurry. The lifting rack 72 is connected to both ends of the material tray 71. The lifting handwheel 75 is connected to one end of the moving worm gear 74. A drive gear 77 and a transmission gear 78 are mounted on the rotating shaft 73. The drive gear 77 meshes with the moving worm gear 74. The transmission gear 78 is meshed with the lifting rack 72. By rotating the lifting handwheel 75, the moving worm gear 74 is driven to rotate, causing the drive gear 77 to rotate, which in turn drives the rotating shaft 73 to rotate. At the same time, the transmission gear 78 rotates, which in turn drives the lifting rack 72 to move up and down, thereby realizing the lifting of the material box to suit different sizes of gravure rollers 41. Meanwhile, a fixing block 79 is provided at the connection between the transmission gear 78 and the lifting rack 72. The support block 76 is connected to the fixing block 79 and is fixedly connected to the frame 1 to fix the material box lifting assembly 7.

[0038] Reference Figure 1 In an embodiment of this utility model, the roller passing mechanism 2 is further provided with a color mark sensor assembly 8, which is arranged in parallel on both sides of the roller passing mechanism 2 to detect the alignment of the coating on the front and back of the foil, so as to ensure the coating quality of the foil.

[0039] Reference Figure 1 , Figure 2 In an embodiment of this utility model, the gap coating device is further provided with a receiving tray 9, a drive electrical box 10, and an operation electrical box 11. The receiving tray 9 is horizontally arranged at the bottom of the frame 1 and can receive the dripping slurry to avoid slurry waste. The drive electrical box 10 is arranged at one end of the frame 1 and is used to install electrical components such as motors and reducers. The operation electrical box 11 is arranged on the other side of the frame 1 and is used to install the mechanical electrical components to realize the overall control of the device, which is convenient and quick.

[0040] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A dual-station gap coating apparatus for lithium batteries, characterized in that: The system includes a frame and a roller feeding mechanism and a coating mechanism mounted on the frame. The coating mechanism is located on both sides of the roller feeding mechanism. Each coating mechanism includes a gravure roller assembly, a forward and backward moving assembly, a doctor blade adjusting assembly, and a material box lifting assembly. The gravure roller assembly and the doctor blade adjusting assembly are both mounted on the forward and backward moving assembly, which drives them to move back and forth. The gravure roller assembly includes a gravure roller and a coating roller. The coating roller is located on both sides of the roller feeding mechanism and is tangent to the gravure roller. The doctor blade adjusting assembly abuts against the gravure roller. The material box lifting assembly is located at the lower end of the gravure roller and provides slurry to the gravure roller. The doctor blade adjusting assembly evenly distributes the slurry on the gravure roller.

2. The dual-station gap coating apparatus for lithium batteries according to claim 1, characterized in that: The forward and backward moving assembly includes a mounting base plate, a linear motor, forward and backward moving guide rails, a cable chain, and a movable mounting plate. The linear motor and the forward and backward moving guide rails are connected between the mounting base plate and the movable mounting plate. The forward and backward moving guide rails are located on both sides of the linear motor. The cable chain is located at the outer end of the movable mounting plate, with one end of the cable chain connected to the mounting base plate and the other end of the cable chain connected to the movable mounting plate.

3. The dual-station gap coating apparatus for lithium batteries according to claim 2, characterized in that: The gravure roller assembly further includes a drive motor, a bearing support, a first mounting plate, a first transverse guide rail, and a lead screw drive assembly. The first mounting plate is slidably connected to the movable mounting plate via the first transverse guide rail. Both ends of the gravure roller are fixedly connected to the first mounting plate via the bearing support. The drive motor is mounted on the upper end of the first mounting plate, and one end of the gravure roller is connected to the drive motor. The lead screw drive assembly is mounted on the movable mounting plate and is used to drive the gravure roller to move along the first transverse guide rail.

4. The dual-station gap coating apparatus for lithium batteries according to claim 3, characterized in that: The lead screw drive assembly includes a lead screw, a sliding pair, a bearing mounting base, and a handwheel. The two ends of the lead screw are mounted on the movable mounting plate through the bearing mounting base. The sliding pair is sleeved on the lead screw and is fixedly connected to the first mounting plate. The handwheel is connected to one end of the lead screw.

5. A dual-station gap coating apparatus for lithium batteries according to claim 2, characterized in that: The scraper adjustment assembly includes a scraper, a scraper moving seat, a scraper flipping assembly, a linear sliding platform, a second mounting plate, a connecting seat, a second transverse guide rail, a moving connecting block, and a scraper translation drive assembly. The scraper abuts against the gravure roller. Both ends of the scraper are connected to the scraper moving seat. The scraper moving seat is connected to the linear sliding platform, which is fixed to the connecting seat. The scraper flipping assembly is connected to the inner end of the scraper moving seat and to the middle of the scraper. The second mounting plate is slidably connected to the moving mounting plate via the second transverse guide rail. The connecting seat is fixed to the second mounting plate. The scraper translation drive assembly is mounted on the moving mounting plate, and its drive end is connected to the second mounting plate via the moving connecting block.

6. A dual-station gap coating apparatus for lithium batteries according to claim 5, characterized in that: The scraper flipping assembly includes a cylinder, a cylinder fixing pin, a cylinder base, a rotating connector, and a scraper fixing double ear seat. The scraper fixing double ear seat is fixedly connected to the scraper. One end of the rotating connector is hinged to the scraper fixing double ear seat, and the other end of the rotating connector is connected to the protruding end of the cylinder. The cylinder fixing pin is fixedly connected to the inner side of the scraper moving seat. The cylinder base is hinged to one end of the cylinder fixing pin, and the cylinder is fixedly mounted on the cylinder base.

7. A dual-station gap coating apparatus for lithium batteries according to claim 5, characterized in that: The scraper translation drive assembly includes a stepper motor, an eccentric rotating shaft, a bearing, and a motor mounting base. The stepper motor is fixed to the movable mounting plate via the motor mounting base. The eccentric rotating shaft is connected to the drive end of the stepper motor, and the bearing is sleeved on the eccentric rotating shaft. The bearing is fixedly installed at one end of the movable connecting block.

8. A dual-station gap coating apparatus for lithium batteries according to claim 1, characterized in that: The material box lifting assembly includes a material tray, a lifting rack, a rotating shaft, a moving worm gear, a lifting handwheel, and a support block. The material tray is located below the gravure roller. Both ends of the material tray are connected to the lifting rack. The lifting handwheel is connected to one end of the moving worm gear. A drive gear and a transmission gear are sleeved on the rotating shaft. The drive gear meshes with the moving worm gear, and the transmission gear meshes with the lifting rack. A fixing block is provided at the connection between the transmission gear and the lifting rack. The support block is connected to the fixing block and is fixedly connected to the frame.

9. A dual-station gap coating apparatus for lithium batteries according to claim 1, characterized in that: The roller-passing mechanism is also equipped with a color mark sensor assembly, which is arranged parallel to both sides of the roller-passing mechanism.

10. A dual-station gap coating apparatus for lithium batteries according to claim 1, characterized in that: The gap coating device is also equipped with a receiving tray, a drive box, and an operating box. The receiving tray is horizontally arranged at the bottom of the frame, the drive box is located at one end of the frame, and the operating box is located on the other side of the frame.

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