Iron removal device for lithium battery gravure coating slurry

Abstract

The utility model relates to the field of slurry iron removal device, and disclose a kind of lithium electric intaglio coating's slurry iron removal device, including jar body, the bottom outside of jar body is fixedly installed with the discharge pipe being communicated its inside, the top of jar body is provided with connecting ring, the inside of connecting ring is provided with rotatable rotary disc, the bottom of rotary disc is correspondingly jar body's inside annular equidistance installation multiple groups of magnetic bar, this lithium electric intaglio coating slurry iron removal device is combined by multiple groups of magnetic bar and rotary stirring structure, make magnetic bar fully rotate in slurry, greatly increase the contact area and contact time of magnetic bar and slurry, can efficiently adsorb the fine iron impurities dispersed in slurry, significantly improve iron removal thoroughness, effectively avoid the battery performance attenuation and security risk caused by iron impurities.

Description

Technical Field

[0001] This utility model relates to the field of slurry iron removal devices, specifically an iron removal device for lithium battery gravure coating slurry. Background Technology

[0002] In the production of lithium-ion batteries, the gravure coating process is one of the core steps, and the purity of the slurry directly determines the battery's electrochemical performance, cycle life, and safety. Iron impurities remaining in the slurry can lead to micro-short circuits inside the battery, accelerated capacity decay, and may even cause safety hazards such as thermal runaway. Therefore, iron removal from the slurry is an indispensable and critical process in lithium battery production.

[0003] Currently, most commonly used lithium battery slurry iron removal devices in the industry employ fixed magnetic rod adsorption, filter screen filtration, or a single stirring adsorption structure, which have significant limitations. On the one hand, the contact area between the fixed magnetic rod and the slurry is limited, and sufficient stirring is not possible, resulting in incomplete adsorption of iron impurities, especially making it difficult to remove uniformly dispersed fine iron particles from the slurry. On the other hand, after the magnetic rod adsorbs iron impurities, it needs to be manually disassembled and cleaned, which is cumbersome, inefficient, and may also cause secondary contamination of the slurry.

[0004] Meanwhile, existing iron removal devices lack precise guiding structures when the magnetic rods enter and exit the tank, which easily leads to positioning deviations and affects the iron removal effect. Some devices with rotatable magnetic rods have insufficient rotational stability and are not equipped with automatic cleaning mechanisms, making continuous iron removal operations impossible. As lithium-ion batteries develop towards higher energy density and higher safety, the requirements for slurry purity in gravure coating processes are becoming increasingly stringent. Existing iron removal devices can no longer meet the demands for efficient, thorough, and clean iron removal. Therefore, there is an urgent need for an iron removal device for lithium battery gravure coating slurry that can achieve full stirring and adsorption, precise guidance, and automatic cleaning. To this end, we propose an iron removal device for lithium battery gravure coating slurry. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides an iron removal device for slurry in lithium battery gravure coating, thus solving the aforementioned problems.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution: an iron removal device for slurry of lithium battery gravure coating, comprising a tank, wherein a discharge pipe communicating with the interior is fixedly installed on the outer bottom of the tank, a connecting ring is provided on the top of the tank, a rotatable rotating disk is provided on the inner side of the connecting ring, and multiple sets of magnetic rods are installed in a ring at equal intervals on the bottom of the rotating disk corresponding to the inner side of the tank.

[0007] Preferably, the inner wall of the connecting ring is provided with an annular groove, and the rotating disk is integrally formed with an annular protrusion at the position corresponding to the annular groove, and the annular protrusion is rotatably engaged with the annular groove.

[0008] Preferably, a second side protrusion is fixedly installed on both sides of the connecting ring, a guide rod is fixedly installed at the bottom of the second side protrusion, and a first side protrusion with a hole is fixedly installed on the outer side of the tank corresponding to the second side protrusion, and the guide rod passes through the hole on the first side protrusion.

[0009] Preferably, a motor assembly is provided on the top of one of the connecting rings, and a gear disk is fixedly installed on the top of the rotating disk, wherein the motor assembly meshes with the gear disk.

[0010] Preferably, the motor assembly includes a motor mounting base, a gear, and a motor, wherein an L-shaped motor mounting base is fixedly mounted on the top of a connecting ring on one side, the motor is fixedly mounted on the motor mounting base, the rotating shaft of the motor passes through the motor mounting base, and a gear is fixedly mounted on the rotating shaft of the motor, the gear meshing with a gear disc.

[0011] Preferably, a lead screw assembly is provided at the top of the gear disk, and a disc is provided at the bottom of the connecting ring. The disc is connected to the lead screw structure, which is used to drive the disc to move up and down. A through hole is provided at the position of the disc corresponding to the magnetic rod, and the through hole passes through the disc.

[0012] Preferably, the lead screw assembly includes a second motor and a threaded rod. The second motor is fixedly mounted on the top of the gear disk. The rotating shaft of the second motor passes through the rotating disk, and a threaded rod is fixedly mounted on its rotating shaft. The threaded rod is threadedly connected to the disk.

[0013] Compared with the prior art, this utility model provides an iron removal device for the slurry of lithium battery gravure coating, which has the following beneficial effects:

[0014] This lithium battery gravure coating slurry iron removal device combines multiple sets of magnetic rods with a rotating stirring structure, allowing the magnetic rods to rotate fully inside the slurry. This significantly increases the contact area and contact time between the magnetic rods and the slurry, enabling efficient adsorption of fine iron impurities dispersed in the slurry. This significantly improves the thoroughness of iron removal and effectively avoids battery performance degradation and safety hazards caused by iron impurities.

[0015] By utilizing the guide rod in conjunction with the first and second side protrusions, as well as the rotating snap-fit ​​design of the annular groove and the annular protrusion, the precise guidance of the magnetic rod when entering and exiting the tank is ensured, avoiding positioning deviations that could affect the iron removal effect. This also improves the stability of the rotating disk driving the magnetic rod to rotate, making the iron removal process more stable and reliable.

[0016] The disc moves up and down by being driven by a lead screw assembly, which can automatically scrape off iron impurities adsorbed on the surface of the magnetic rod without the need for manual disassembly and cleaning. This not only simplifies the operation process and reduces labor costs, but also avoids secondary pollution of the slurry caused by manual cleaning, realizing continuous iron removal operation and meeting the high-efficiency needs of industrial production.

[0017] The overall structure is compact and reasonable. The magnetic rod loading and unloading, rotation stirring and automatic cleaning functions are smoothly connected. It is easy to operate and adapts to the production rhythm of lithium battery gravure coating process. While improving the purity of slurry, it indirectly ensures the quality of subsequent coating and the electrochemical performance, cycle life and safety of the finished battery. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 for Figure 1 A magnified view of part A in the diagram;

[0020] Figure 3 This is a top view of the present invention;

[0021] Figure 4 for Figure 3 BB cross-sectional diagram in the middle;

[0022] Figure 5 for Figure 4 A magnified view of part C in the diagram;

[0023] Figure 6 for Figure 4 A magnified view of part D in the diagram.

[0024] In the diagram: 1. Tank body; 2. Discharge pipe; 3. Side protrusion one; 4. Guide rod; 5. Connecting ring; 6. Side protrusion two; 7. Gear disk; 8. Motor mounting base; 9. Gear; 10. Motor one; 11. Rotary disk; 12. Magnetic rod; 13. Disc; 14. Through hole; 15. Threaded rod; 16. Motor two; 17. Annular groove; 18. Annular protrusion. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-6A device for removing iron from the slurry used in the gravure coating of lithium batteries includes a tank 1. A discharge pipe 2, which connects to the inside of the tank 1, is fixedly installed on the outer bottom of the tank 1. A connecting ring 5 is provided on the top of the tank 1. A rotating disk 11 is provided on the inner side of the connecting ring 5. Multiple sets of magnetic rods 12 are installed in a ring at equal intervals on the bottom of the rotating disk 11 corresponding to the inner side of the tank 1. When it is necessary to remove iron from the slurry used in the gravure coating of lithium batteries, the connecting ring 5 is installed on a hoisting device. Then, the slurry used in the gravure coating of lithium batteries is injected into the tank 1. The hoisting device then extends and retracts downward, and the magnetic rods 12 move into the inside of the tank 1 to contact the slurry used in the gravure coating of lithium batteries. Then, the rotating disk 11 rotates, driving the multiple sets of magnetic rods 12 to rotate, stirring and fully contacting the slurry used in the gravure coating of lithium batteries. Then, the iron in the slurry is adsorbed. Then, the hoisting device is restarted and retracted upward, the connecting ring 5 moves upward, and the magnetic rods 12 move to the outer side of the tank 1.

[0027] Furthermore, an annular groove 17 is provided on the inner wall of the connecting ring 5, and an annular protrusion 18 is integrally formed on the rotating disk 11 at the position corresponding to the annular groove 17. The annular protrusion 18 is rotatably engaged with the annular groove 17.

[0028] Furthermore, side protrusions 6 are fixedly installed on both sides of the connecting ring 5, and guide rods 4 are fixedly installed at the bottom of the side protrusions 6. A side protrusion 3 with a hole is fixedly installed on the outer side of the tank body 1 at the position corresponding to the side protrusions 6. The guide rods 4 pass through the holes on the side protrusions 3. When the connecting ring 5 moves up and down, the guide rods 4 can provide guidance.

[0029] Furthermore, a motor assembly is provided on the top of the connecting ring 5 on one side, and a gear disk 7 is fixedly installed on the top of the rotating disk 11. The motor assembly meshes with the gear disk 7. When the motor assembly is started, it drives the rotating disk 11 to rotate, thereby enabling multiple sets of magnetic rods 12 to stir inside the slurry coated on the lithium battery gravure plate.

[0030] Furthermore, the motor assembly includes a motor mounting base 8, a gear 9, and a motor 10. An L-shaped motor mounting base 8 is fixedly mounted on the top of a connecting ring 5 on one side. The motor 10 is fixedly mounted on the motor mounting base 8. The rotating shaft of the motor 10 passes through the motor mounting base 8. A gear 9 is fixedly mounted on the rotating shaft of the motor 10. The gear 9 meshes with a gear disk 7. When the rotating disk 11 needs to rotate, the motor 10 starts, driving the gear 9 to rotate. Under the action of meshing, the rotating disk 11 rotates, thereby driving multiple sets of magnetic rods 12 to rotate around the rotating disk 11 as the center, stirring the slurry coated with lithium battery gravure inside the tank 1.

[0031] Furthermore, a lead screw assembly is provided on the top of the gear disk 7, and a disc 13 is provided on the bottom of the connecting ring 5. The disc 13 is connected to the lead screw structure, which is used to drive the disc 13 to move up and down. A through hole 14 is provided on the disc 13 at the position corresponding to the magnetic rod 12. The through hole 14 passes through the disc 13. When the magnetic rod 12 moves to the outside of the tank 1, the outside of the magnetic rod 12 adsorbs iron impurities in the slurry of the lithium battery gravure coating. Then the discharge pipe 2 is opened to discharge the slurry of the lithium battery gravure coating after iron removal. Then the lead screw assembly is started, driving the disc 13 to move downward. Then the disc 13 scrapes off the iron material attached to the surface of the magnetic rod 12, cleaning the magnetic rod 12.

[0032] Furthermore, the lead screw assembly includes a second motor 16 and a threaded rod 15. The second motor 16 is fixedly mounted on the top of the gear disk 7. The rotating shaft of the second motor 16 passes through the rotating disk 11, and the threaded rod 15 is fixedly mounted on its rotating shaft. The threaded rod 15 is threadedly connected to the disk 13. When it is necessary to clean the magnetic rod 12, the second motor 16 is started, driving the threaded rod 15 to rotate, and then the disk 13 moves.

[0033] Working principle: When iron removal is required from the slurry used for gravure coating of lithium batteries, the connecting ring 5 is installed on the hoisting equipment. Then, the slurry is injected into the tank 1. The hoisting equipment then extends and retracts downwards, moving the magnetic rods 12 into the tank 1 to contact the slurry. Subsequently, the rotating disk 11 rotates, causing multiple sets of magnetic rods 12 to rotate, stirring and ensuring thorough contact with the slurry. This process adsorbs the iron in the slurry. The hoisting equipment then restarts and retracts upwards, while the connecting ring 5 moves upwards. Simultaneously, the magnetic rod 12 moves to the outside of the tank 1. When the magnetic rod 12 moves to the outside of the tank 1, the outer side of the magnetic rod 12 adsorbs iron impurities in the slurry of the lithium battery gravure coating. Then, the discharge pipe 2 is opened to discharge the iron-removed lithium battery gravure coating slurry. Subsequently, the lead screw assembly is started, driving the disc 13 to move downwards. Then, the disc 13 scrapes off the iron material attached to the surface of the magnetic rod 12, cleaning the magnetic rod 12.

[0034] The structure is as follows:

[0035] Tank 1

[0036] This space, used to hold the lithium battery gravure coating slurry to be removed from the iron, is the core storage space for the iron removal operation. A discharge pipe 2, communicating with the interior, is fixedly installed on the bottom outer side. The top can be fitted with a connecting ring 5, allowing the magnetic rod 12 to extend into the interior to contact the slurry and complete the iron removal. A perforated side protrusion 3 is fixedly installed on the outer side at the position corresponding to the second side protrusion 6, for use with the guide rod 4 for guidance.

[0037] Discharge pipe 2

[0038] It is fixedly installed on the outside of the bottom of tank 1 and connected to the inside of tank 1. Its main function is to open the valve after the iron removal of the slurry to discharge the iron-removed lithium battery gravure coating slurry from tank 1.

[0039] Side protrusion 13

[0040] It is fixedly installed on the outside of the tank body 1, and its position corresponds to the side protrusion 26 on the connecting ring 5. It has a hole for the guide rod 4 to pass through, and through cooperation with the guide rod 4, it provides stable support and a guiding foundation for the up and down movement of the connecting ring 5.

[0041] Guide rod 4

[0042] It is fixedly installed at the bottom of the second side protrusion 6, and passes vertically downward through the hole on the first side protrusion 3. When the connecting ring 5 moves up and down under the drive of the hoisting equipment, it plays a precise guiding role, preventing the connecting ring 5 from deviating and ensuring that the magnetic rod 12 can accurately enter and exit the tank 1.

[0043] Connecting ring 5

[0044] The entire structure is used to connect with hoisting equipment and is the core support structure for supporting components such as the rotating disk 11 and magnetic rod 12. An annular groove 17 is provided on the inner wall to cooperate with the annular protrusion 18 of the rotating disk 11 to achieve a rotatable connection; side protrusions 6 are fixedly installed on both sides, and an L-shaped motor mounting seat 8 is fixedly installed on one side of the top, through which the gear disk 7, motor assembly, etc. are installed and fixed.

[0045] Side protrusion 26

[0046] It is fixedly installed on both sides of the connecting ring 5, and its bottom is fixedly connected to the guide rod 4. As the connecting carrier between the connecting ring 5 and the guide rod 4, the stability of the connecting ring 5's up and down movement is ensured through the cooperation between the guide rod 4 and the side protrusion 3.

[0047] Gear disk 7

[0048] It is fixedly installed on the top of the rotating disk 11 and meshes with the gear 9 in the motor assembly. The second motor 16 is also fixedly installed on the top. It is a key component for transmitting the power of the first motor 10. It drives the rotating disk 11 to rotate by meshing with the gear 9, and at the same time provides a mounting base for the lead screw assembly.

[0049] Motor mounting bracket 8

[0050] It has an L-shaped structure and is fixedly installed on one side of the top of the connecting ring 5. It is mainly used to fix and install motor 10, providing stable mounting support for motor 10 and ensuring that the rotating shaft of motor 10 can be accurately connected to gear 9.

[0051] Gear 9

[0052] It is fixedly installed on the rotating shaft of motor 10 and meshes with gear disk 7. It is an intermediate component for power transmission of motor 10. By rotating itself, it drives gear disk 7 to rotate, thereby realizing the rotation of rotating disk 11 and magnetic rod 12.

[0053] Motor 10

[0054] It is fixedly installed on the motor mounting base 8, and the rotating shaft passes through the motor mounting base 8 and is fixedly connected to the gear 9. It is the power source for driving the magnetic rod 12 to rotate. After starting, it drives the rotating disk 11 and multiple sets of magnetic rods 12 to rotate and stir in the slurry through the meshing of the gear 9 and the gear disk 7.

[0055] Rotating disk 11

[0056] Installed on the inner side of the connecting ring 5, it can rotate around the connecting ring 5. Multiple sets of magnetic rods 12 are installed in a ring at equal intervals at the bottom, and a gear disk 7 is fixedly installed at the top. The edge is integrally formed with an annular protrusion 18. It achieves limit by rotating and engaging with the annular groove 17. Driven by the motor 10, it drives the magnetic rods 12 to rotate, so that the magnetic rods 12 can fully contact the slurry.

[0057] Magnetic rod 12

[0058] The ring-shaped, equidistantly fixed component at the bottom of the rotating disk 11 is the core component for adsorbing iron substances in the slurry. Driven by a hoisting device, it can extend into the tank 1 and, upon contact with the slurry, adsorb iron impurities through its own magnetism. As the rotating disk 11 rotates, the component rotates together with it to stir the slurry, improving iron removal efficiency.

[0059] 13 disks

[0060] It is located at the bottom of the connecting ring 5 and is threadedly connected to the threaded rod 15. A through hole 14 is provided at the position corresponding to the magnetic rod 12, through which the magnetic rod 12 can pass; it can move up and down under the drive of the lead screw assembly. When it moves downward, it can scrape off the iron impurities attached to the surface of the magnetic rod 12, thereby cleaning the magnetic rod 12.

[0061] Through hole 14

[0062] It is cut on the disc 13, with its position corresponding to the magnetic rod 12, and penetrates the upper and lower surfaces of the disc 13. It is mainly used to avoid the magnetic rod 12, so that the magnetic rod 12 can pass smoothly through the disc 13 and enter the interior of the tank 1, while not affecting the up and down movement of the disc 13 to clean the magnetic rod 12.

[0063] Threaded rod 15

[0064] It is fixedly mounted on the rotating shaft of motor 2 16 and threadedly connected to disc 13. It is the core transmission component of the lead screw assembly. Driven by motor 2 16, it converts rotational motion into linear motion, which drives disc 13 to move up and down.

[0065] Motor 2 16

[0066] Fixedly mounted on the top of the gear disk 7, the rotating shaft passes through the rotating disk 11 and is fixedly connected to the threaded rod 15. It is the power source that drives the disk 13 to move. After starting, it drives the threaded rod 15 to rotate, thereby controlling the disk 13 to move up and down, realizing the cleaning operation of the magnetic rod 12.

[0067] Annular groove 17

[0068] It is formed on the inner wall of the connecting ring 5 in a ring structure. It is rotatably engaged with the annular protrusion 18 of the rotating disk 11, providing a rotation limit for the rotating disk 11 and ensuring that the rotating disk 11 can rotate stably around the connecting ring 5 without deviation.

[0069] 18 ring-shaped protrusions

[0070] It is integrally formed on the edge of the rotating disk 11, and its position corresponds to the annular groove 17 of the connecting ring 5. It rotates and engages with the annular groove 17, which not only realizes the connection between the rotating disk 11 and the connecting ring 5, but also ensures the flexibility and stability of the rotating disk 11 during rotation.

[0071] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for removing iron from the slurry used in lithium battery gravure coating, characterized in that, The container includes a tank (1), and a discharge pipe (2) that communicates with the inside of the tank is fixedly installed on the outer bottom of the tank (1). A connecting ring (5) is provided on the top of the tank (1). A rotating disk (11) is provided on the inner side of the connecting ring (5). Multiple sets of magnetic rods (12) are installed in a ring at equal intervals on the bottom of the rotating disk (11) corresponding to the inner side of the tank (1).

2. The iron removal device for the slurry in lithium battery gravure coating according to claim 1, characterized in that: The inner wall of the connecting ring (5) is provided with an annular groove (17), and the rotating disk (11) is integrally formed with an annular protrusion (18) at the position corresponding to the annular groove (17). The annular protrusion (18) and the annular groove (17) are rotatably engaged together.

3. The iron removal device for the slurry in lithium battery gravure coating according to claim 1, characterized in that: Both sides of the connecting ring (5) are fixedly installed with side protrusions two (6), and a guide rod (4) is fixedly installed at the bottom of the side protrusions two (6). A side protrusion one (3) with a hole is fixedly installed on the outer side of the tank body (1) at the position corresponding to the side protrusions two (6). The guide rod (4) passes through the hole on the side protrusion one (3).

4. The iron removal device for the slurry in lithium battery gravure coating according to claim 3, characterized in that: A motor assembly is provided on the top of the connecting ring (5) on one side, and a gear disk (7) is fixedly installed on the top of the rotating disk (11), wherein the motor assembly meshes with the gear disk (7).

5. The iron removal device for the slurry of lithium battery gravure coating according to claim 4, characterized in that: The motor assembly includes a motor mounting base (8), a gear (9), and a motor (10). An L-shaped motor mounting base (8) is fixedly mounted on the top of a connecting ring (5) on one side. The motor (10) is fixedly mounted on the motor mounting base (8). The rotating shaft of the motor (10) passes through the motor mounting base (8). The gear (9) is fixedly mounted on the rotating shaft of the motor (10). The gear (9) meshes with a gear disk (7).

6. The iron removal device for the slurry of lithium battery gravure coating according to claim 4, characterized in that: The top of the gear disk (7) is provided with a lead screw assembly, and the bottom of the connecting ring (5) is provided with a disc (13). The disc (13) is connected to the lead screw structure, and the lead screw structure is used to drive the disc (13) to move up and down. The disc (13) is provided with a through hole (14) at the position corresponding to the magnetic rod (12), and the through hole (14) passes through the disc (13).

7. The iron removal device for the slurry in lithium battery gravure coating according to claim 6, characterized in that: The lead screw assembly includes a second motor (16) and a threaded rod (15). The second motor (16) is fixedly mounted on the top of the gear disk (7). The rotating shaft of the second motor (16) passes through the rotating disk (11), and the threaded rod (15) is fixedly mounted on its rotating shaft. The threaded rod (15) is threadedly connected to the disk (13).

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