A vertical reaction kettle for coating lithium battery negative electrode material

Abstract

The utility model relates to lithium battery production technical field discloses a vertical reaction kettle for lithium battery negative material coating, including the kettle body, the kettle body top fixedly connected with motor, motor drive end fixedly connected with connecting shaft, the connecting shaft outer periphery middle part fixedly connected with limit block no.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production technology, and in particular to a vertical reactor for coating negative electrode materials of lithium batteries. Background Technology

[0002] Lithium-ion batteries are globally recognized as a green energy source. Anode materials are the most mature materials used in lithium-ion batteries and are also one of the main factors affecting the energy density of lithium-ion batteries. An ideal lithium-ion battery should have properties such as low potential, stable structure, small potential variation, good reversibility of lithium-ion insertion / extraction, good conductivity, good interface stability, and low interface AC impedance, in order to meet the requirements of lithium-ion batteries to have higher energy density and charge / discharge functions.

[0003] The most crucial step in manufacturing the artificial graphite anode material for lithium-ion batteries is the coating and carbonization process. Firstly, the reaction temperatures required for anode material production are increasingly higher. Secondly, the materials used in lithium-ion battery anode material production include powders and pitch coke, which are extremely difficult to mix and have high flow resistance. Therefore, the effectiveness of material mixing during anode material production becomes one of the most critical factors determining product quality.

[0004] Traditional reactors typically use fixed-height stirring paddles, which can only create a stirring flow field in a specific area. For high-viscosity coating systems or equipment with a large vessel height, problems such as material stratification and uneven distribution of coating agent are likely to occur. Therefore, a vertical reactor for coating lithium battery anode materials is used to solve these problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a vertical reactor for coating lithium battery anode materials. It aims to improve the existing technology where the height of the stirring component is fixed, which cannot adapt to the stirring requirements of different height areas. This results in material stratification in high-viscosity coating systems or tall reactors, and uneven distribution of the coating agent in the material due to the limited stirring flow field, thus affecting the consistency of anode material coating quality.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A vertical reactor for coating lithium battery anode materials includes a reactor body, a motor fixedly connected to the top of the reactor body, a connecting shaft fixedly connected to the drive end of the motor, a limiting block one fixedly connected to the top of the outer periphery of the connecting shaft, a limiting block two fixedly connected to the middle of the outer periphery of the connecting shaft, and a transmission assembly installed on the outer periphery of the connecting shaft.

[0008] The transmission assembly includes a lifting base, which is threaded to the outer periphery of the connecting shaft. The bottom of the lifting base abuts against the top of the limiting block two. A threaded hole is provided on the top of the lifting base, and the connecting shaft is threaded into the threaded hole. Multiple evenly distributed stirring blades are fixedly connected to the outer periphery of the lifting base.

[0009] As a further description of the above technical solution:

[0010] The limiting block 2 has fixing holes on both the front and rear sides. The bottom of the lifting base is slidably connected to the limiting rods at both the front and rear. The limiting rods are fixedly connected to the outer periphery of the limiting plate. A spring is fixedly connected to the top rear side of the limiting plate. The spring is sleeved on the outer periphery of the limiting rod. A fixing rod is fixedly connected to the bottom front side of the limiting plate. The fixing rod is slidably connected in the fixing hole.

[0011] As a further description of the above technical solution:

[0012] The lifting base has limit grooves at both the front and rear, and the rear end of the limit rod is slidably connected in the limit groove.

[0013] As a further description of the above technical solution:

[0014] The lifting base has telescopic grooves at both the front and rear of its bottom. The top of the limiting plate is slidably connected to the telescopic groove, and the other end of the spring abuts against the telescopic groove.

[0015] As a further description of the above technical solution:

[0016] Multiple evenly distributed connecting rods are fixedly connected to the outer periphery of the connecting shaft, and a scraper is fixedly connected to the front end of the connecting rod, with the scraper abutting against the inner wall of the vessel.

[0017] As a further description of the above technical solution:

[0018] A connecting plate 1 is fixedly connected to the middle of the outer periphery of the connecting shaft, and a connecting plate 2 is fixedly connected to the bottom of the outer periphery of the connecting shaft. A scraper 2 is fixedly connected to the front end of the connecting plate 1 and the connecting plate 2, and the scraper 2 abuts against the inner wall of the vessel.

[0019] As a further description of the above technical solution:

[0020] The top of the vessel body is provided with a maintenance port, the front of the vessel body is provided with a feed port, and the bottom of the vessel body is provided with a discharge port;

[0021] As a further description of the above technical solution:

[0022] The middle part of the connecting shaft is threaded, and the second scraper is triangular and elongated.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the connecting shaft and the lifting base are threaded together, which can drive the stirring blade to move up and down smoothly along the connecting shaft axis, so as to realize the stirring operation of materials in different height areas in the reactor, avoid material stratification, ensure that the coating agent and the negative electrode material particles are in full contact and evenly distributed, significantly improve the consistency of the coating layer thickness, and reduce the risk of product performance fluctuations caused by uneven local coating.

[0025] 2. In this utility model, the fixing rod and the fixing hole are engaged and fixed, which can make the stirring blade stably located in the lower part of the vessel body. This area is a key position where materials are easy to accumulate. Stable stirring can form a continuous shearing and dispersing effect on the accumulated materials, prevent the materials from settling and clumping during the coating process, and at the same time ensure the dynamic exchange between the bottom material and the upper material, further enhancing the overall mixing effect. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a vertical reactor for coating lithium battery negative electrode materials according to the present invention.

[0027] Figure 2 This is a schematic diagram of the connecting shaft of a vertical reactor for coating lithium battery negative electrode materials, as proposed in this utility model.

[0028] Figure 3 This is a schematic diagram of the structure of a scraper in a vertical reactor for coating lithium battery negative electrode materials, as proposed in this utility model.

[0029] Figure 4 This is a schematic diagram of the stirring blades of a vertical reactor for coating lithium battery negative electrode materials, as proposed in this utility model.

[0030] Figure 5 This is a schematic diagram of the lifting base of a vertical reactor for coating lithium battery negative electrode materials, as proposed in this utility model.

[0031] Legend:

[0032] 1. Kettle body; 2. Inlet; 3. Outlet; 4. Maintenance port; 5. Motor; 6. Connecting shaft; 7. Limiting block one; 8. Connecting rod; 9. Scraper one; 10. Limiting block two; 11. Lifting base; 12. Threaded hole; 13. Stirring blade; 14. Connecting plate one; 15. Connecting plate two; 16. Scraper two; 17. Fixing hole; 18. Limiting rod; 19. Limiting plate; 20. Fixing rod; 21. Limiting groove; 22. Telescopic groove; 23. Spring. Detailed Implementation

[0033] 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.

[0034] Reference Figures 1-5 This utility model provides an embodiment of a vertical reactor for coating lithium battery anode materials, comprising a reactor body 1. The reactor body 1 serves as the container for the entire reaction, providing a closed reaction space for coating lithium battery anode materials. It can accommodate anode materials, coating agents, and other materials, and maintain the temperature, pressure, and inert gas atmosphere required for the reaction. A motor 5 is fixedly connected to the top of the reactor body 1, and a connecting shaft 6 is fixedly connected to the drive end of the motor 5. The motor 5 provides a power source for the entire stirring and lifting mechanism, and drives the connecting shaft 6 to rotate by outputting torque. The middle part of the connecting shaft 6... The connecting shaft 6 is threaded and its threaded structure engages with the threaded hole 12 at the top of the lifting base 11. When the motor 5 drives the connecting shaft 6 to rotate in both directions, the lifting base 11 can be driven to rise and fall axially through the threaded transmission, thereby achieving the height adjustment of the stirring blade 13. A limit block 7 is fixedly connected to the top of the outer periphery of the connecting shaft 6. The limit block 7 restricts the upward stroke of the lifting base 11. A limit block 10 is fixedly connected to the middle of the outer periphery of the connecting shaft 6. The limit block 10 is the reference position of the lifting base 11 when it is fixed for stirring. A transmission component is installed on the outer periphery of the connecting shaft 6.

[0035] The transmission assembly includes a lifting base 11, which is threaded to the outer periphery of the connecting shaft 6. The lifting base 11 is the carrier for mounting the stirring blades 13. It achieves its own lifting by threaded engagement with the connecting shaft 6. The bottom of the lifting base 11 abuts against the top of the limiting block 2 10. The top of the lifting base 11 has a threaded hole 12, and the connecting shaft 6 is threaded into the threaded hole 12. The threaded hole 12 is the key structure for realizing the threaded transmission between the lifting base 11 and the connecting shaft 6. Multiple evenly distributed stirring blades 13 are fixedly connected to the outer periphery of the lifting base 11. When the stirring blades 13 rotate, they can stir the material in the vessel 1, so that the negative electrode material and the coating agent are fully mixed. Multiple evenly distributed stirring blades 13 can enhance the uniformity of stirring and avoid local accumulation of material.

[0036] Reference Figures 1-3The second limiting block 10 has fixing holes 17 on both its front and rear sides. The fixing holes 17 provide space for the fixing rod 20 to be inserted. When the fixing rod 20 is inserted into the fixing hole 17, the lifting base 11 and the second limiting block 10 can be fixed relative to each other, preventing the lifting base 11 from shifting position during the stirring process. The bottom of the lifting base 11 is slidably connected to the front and rear of the limiting rod 18. The limiting rod 18 can drive the limiting plate 19 and the fixing rod 20 to slide back and forth. By pulling the limiting rod 18, the fixing rod 20 can be separated and connected to the fixing hole 17, which is convenient for operation. The limiting plate 19 is fixedly connected to the outer periphery of the limiting rod 18. A spring 23 is fixedly connected to the top rear side of the limiting plate 19. The spring 23 uses its own elastic deformation to push the limiting plate 19 in its natural state. Move forward to keep the fixing rod 20 inserted into the fixing hole 17. The spring 23 is sleeved on the outer periphery of the limiting rod 18. The fixing rod 20 is fixedly connected to the bottom front side of the limiting plate 19. The fixing rod 20 is slidably connected in the fixing hole 17. Limiting grooves 21 are opened at both the front and rear inside the lifting base 11. The limiting grooves 21 ensure that the limiting rod 18 and its connected parts will not fall off during lifting. The rear end of the limiting rod 18 is slidably connected in the limiting groove 21. Telescopic grooves 22 are opened at both the front and rear bottom of the lifting base 11. The top of the limiting plate 19 is slidably connected in the telescopic groove 22. The other end of the spring 23 abuts in the telescopic groove 22. The telescopic groove 22 provides installation and movement space for the limiting plate 19 and the spring 23, allowing the limiting plate 19 to slide smoothly in it.

[0037] Reference Figures 1-3 Multiple evenly distributed connecting rods 8 are fixedly connected to the outer periphery of the connecting shaft 6. A scraper 9 is fixedly connected to the front end of each connecting rod 8, and the scraper 9 abuts against the inner wall of the vessel body 1. The connecting rods 8 connect the connecting shaft 6 and the scraper 9, transmitting the rotational motion of the connecting shaft 6 to the scraper 9, causing the scraper 9 to rotate synchronously with the connecting shaft 6. This ensures the scraping effect of the scraper 9 and minimizes material residue on the upper part of the inner wall of the vessel body 1. A connecting plate 14 is fixedly connected to the middle of the outer periphery of the connecting shaft 6, and a connecting plate 15 is fixedly connected to the bottom of the outer periphery of the connecting shaft 6. A scraper 16 is fixedly connected to the front end of both the connecting plate 14 and the connecting plate 15. The scraper 16 is triangular and elongated, and abuts against the inner wall of the vessel body 1. When scraper 16 rotates with connecting shaft 6, it can scrape off the material residue in the lower middle part of the inner wall of the vessel body 1. In conjunction with scraper 9, it can achieve cleaning of the entire inner wall of the vessel body 1. A maintenance port 4 is provided at the top of the vessel body 1. The maintenance port 4 provides a channel for the inspection, maintenance and replacement of internal components of the equipment, making it convenient for operators to inspect and maintain components such as connecting shaft 6 and stirring blade 13. A feed port 2 is provided at the front of the vessel body 1. The feed port 2 is the channel for materials to enter the vessel body 1, making it convenient to add materials such as negative electrode material and coating agent into the reactor. A discharge port 3 is provided at the bottom of the vessel body 1. The discharge port 3 is the channel for the material to be discharged after the coating reaction is completed, making it convenient to transport the processed negative electrode material to the next process.

[0038] Working principle: When it is necessary to stir the material in different height areas within the vessel 1, the motor 5 is started to drive the connecting shaft 6 to rotate. Since the middle part of the connecting shaft 6 is threaded and matches the threaded hole 12 at the top of the lifting base 11, the rotation of the connecting shaft 6 will cause the lifting base 11 to move axially along the connecting shaft 6 through the threaded transmission. If the connecting shaft 6 rotates forward, the lifting base 11 will drive the stirring blade 13 to rise. If the connecting shaft 6 rotates in reverse, the lifting base 11 will drive the stirring blade 13 to fall. In this way, the stirring blade 13 can perform stirring operations in different height areas within the vessel 1, forming a mixed flow field that circulates up and down, ensuring that the coating agent and the negative electrode material particles are in full contact and evenly distributed, thus improving the consistency of the coating layer thickness.

[0039] When it is necessary to fix the stirring blade 13 in the lower area of ​​the vessel body 1 for stirring, the motor 5 is first reversed to lower the lifting base 11 until its bottom abuts against the top of the limiting block 2 10. At this time, under the elastic force of the spring 23, the limiting plate 19 drives the fixing rod 20 to slide forward and insert into the fixing holes 17 on both sides of the limiting block 2 10, fixing the lifting base 11 and the limiting block 2 10 relative to each other. Then, the motor 5 is started to drive the connecting shaft 6 to rotate, which drives the stirring blade 13 fixed at the bottom to continuously shear and disperse the area of ​​easy-to-accumulate materials in the lower part of the vessel body 1.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vertical reaction kettle for coating lithium battery negative electrode material, comprising a kettle body (1), characterized in that: A motor (5) is fixedly connected to the top of the vessel body (1), a connecting shaft (6) is fixedly connected to the driving end of the motor (5), a limiting block one (7) is fixedly connected to the top of the outer periphery of the connecting shaft (6), a limiting block two (10) is fixedly connected to the middle of the outer periphery of the connecting shaft (6), and a transmission assembly is installed on the outer periphery of the connecting shaft (6). The transmission assembly includes a lifting base (11), which is threaded to the outer periphery of the connecting shaft (6). The bottom of the lifting base (11) abuts against the top of the limiting block two (10). A threaded hole (12) is provided on the top of the lifting base (11). The connecting shaft (6) is threaded to the threaded hole (12). A plurality of evenly distributed stirring blades (13) are fixedly connected to the outer periphery of the lifting base (11). The limiting block 2 (10) has fixing holes (17) on both the front and rear sides. The bottom of the lifting base (11) is slidably connected to the limiting rod (18) at both the front and rear. The limiting rod (18) is fixedly connected to the outer periphery of the limiting plate (19). The top of the rear side of the limiting plate (19) is fixedly connected to a spring (23). The spring (23) is sleeved on the outer periphery of the limiting rod (18). The bottom of the front side of the limiting plate (19) is fixedly connected to a fixing rod (20). The fixing rod (20) is slidably connected in the fixing hole (17).

2. The vertical reactor for coating lithium battery anode materials according to claim 1, characterized in that: The lifting base (11) has limit grooves (21) at both the front and rear, and the rear end of the limit rod (18) is slidably connected in the limit groove (21).

3. The vertical reaction kettle for coating lithium battery negative electrode material according to claim 1, characterized in that: The lifting base (11) has telescopic grooves (22) at both the front and back of its bottom. The top of the limiting plate (19) is slidably connected in the telescopic groove (22), and the other end of the spring (23) abuts against the telescopic groove (22).

4. The vertical reaction kettle for coating lithium battery negative electrode material according to claim 1, characterized in that: Multiple evenly distributed connecting rods (8) are fixedly connected to the outer periphery of the connecting shaft (6), and a scraper (9) is fixedly connected to the front end of the connecting rod (8), and the scraper (9) abuts against the inner wall of the vessel body (1).

5. The vertical reaction kettle for coating lithium battery negative electrode material according to claim 1, characterized in that: A connecting plate 1 (14) is fixedly connected to the middle of the outer periphery of the connecting shaft (6), and a connecting plate 2 (15) is fixedly connected to the bottom of the outer periphery of the connecting shaft (6). A scraper 2 (16) is fixedly connected to the front end of the connecting plate 1 (14) and the connecting plate 2 (15), and the scraper 2 (16) abuts against the inner wall of the vessel body (1).

6. The vertical reaction kettle for coating lithium battery negative electrode material according to claim 1, characterized in that: The top of the vessel body (1) is provided with a maintenance port (4), the front of the vessel body (1) is provided with a feed port (2), and the bottom of the vessel body (1) is provided with a discharge port (3).

7. The vertical reaction kettle for coating lithium battery negative electrode material according to claim 5, characterized in that: The middle part of the connecting shaft (6) is threaded, and the scraper (16) is triangular strip-shaped.

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