A Lithium-ion Battery Graphite Anode Material Shaping Machine

Abstract

This invention relates to the fields of material processing and battery manufacturing technology, specifically to a lithium battery graphite anode material shaping machine. The machine includes a cylinder, an upper moving grinding disc, an upper stationary grinding disc, a lower moving grinding disc, a lower stationary grinding disc, and an air blowing mechanism. The upper stationary grinding disc is fixed to the cylinder and forms an upper grinding channel with the upper moving grinding disc. A material drop gap is formed between the outer edge of the lower moving grinding disc and the inner wall of the cylinder. The lower stationary grinding disc is stacked on top of the lower moving grinding disc, and the stacked portion forms a laterally extending lower grinding channel. The lower stationary grinding disc has an inner outlet for receiving graphite ground by the upper grinding channel and an outer outlet directly connected to the material drop gap. This invention classifies the graphite particles after the initial grinding using airflow, allowing graphite reaching the standard particle size to be directly collected, while graphite not reaching the standard particle size is discharged into the lower grinding channel for secondary grinding. This avoids secondary grinding of graphite reaching the standard particle size, ensuring a high finished product qualification rate.

Description

Technical Field

[0001] This invention relates to the fields of materials processing and battery manufacturing technology, specifically to a lithium battery graphite anode material shaping machine. Background Technology

[0002] Graphite, with its excellent electrical conductivity, robust charge / discharge potential, high specific energy, and abundant resources on Earth, has long been the preferred anode material for lithium-ion batteries. To enhance the performance of graphite materials, particularly in improving battery cycle efficiency and energy storage density, shaping technology has become standard practice in the industry. This technique aims to refine graphite particles to near-spherical shapes to optimize their electrochemical behavior.

[0003] For example, the utility model patent with announcement number CN207753099U discloses a shaping machine for the production of graphite anode materials for lithium batteries. It adopts a three-stage grinding and shaping scheme, that is, through the synergistic effect between the grinding roller, the moving turntable and the grinding blocks on the stator gear ring, the deep processing of graphite materials is realized, thereby improving the shaping efficiency and quality of graphite particles.

[0004] However, while these shaping machines perform well in shaping graphite, they lack the function of classifying the ground graphite particles. This means that graphite particles that have reached the ideal particle size in the primary or secondary grinding stages will still be processed again by subsequent grinding structures, resulting in the generation of excessively fine graphite particles and thus reducing the overall yield of finished graphite. Given this limitation, there is an urgent need to develop a lithium-ion battery graphite anode material shaping machine that integrates shaping and classification to achieve more efficient and precise material processing and improve the quality of finished graphite products. Summary of the Invention

[0005] The purpose of this invention is to provide a lithium battery graphite anode material shaping machine to solve the problems mentioned in the background art.

[0006] This invention is achieved through the following technical solution:

[0007] A lithium battery graphite anode material shaping machine includes:

[0008] The cylinder has a feed inlet at the top and a discharge outlet at the bottom.

[0009] The upper grinding disc is located inside the cylinder and is driven to rotate by a drive device.

[0010] An upper stationary grinding disc is fixed on the cylinder and forms an upper grinding channel with the upper movable grinding disc;

[0011] The lower moving grinding disc is fixed relative to the upper moving grinding disc, and a material dropping gap is formed between its outer edge and the inner wall of the cylinder.

[0012] A lower stationary grinding disc, stacked on the lower movable grinding disc and fixed to the cylinder, forms a laterally extending lower grinding channel. The lower stationary grinding disc has an inner outlet communicating with the lower grinding channel and used to receive graphite ground by the upper grinding channel, and an outer outlet directly communicating with the lower material drop gap; and

[0013] An air blowing mechanism is disposed between the upper stationary grinding disc and the lower stationary grinding disc and is configured to blow air from the inner outlet toward the outer outlet.

[0014] Optionally, the lithium battery graphite anode material shaping machine further includes a central shaft with a hollow portion. The driving device drives the central shaft to rotate around its own axis. The central shaft fixes the upper moving grinding disc and the lower moving grinding disc together. The air blowing mechanism includes a first air hole and an air blowing device. The first air hole is disposed on the central shaft located between the upper stationary grinding disc and the lower stationary grinding disc. The first air hole is connected to the exhaust end of the air blowing device through the hollow portion of the central shaft.

[0015] Optionally, the central shaft is rotatably connected to the cylinder, the first end of the central shaft extends through the outside of the cylinder and is open, the second end of the central shaft is connected to a drive device, the blowing device is a blower, the exhaust end of the blower is provided with an exhaust nozzle, the exhaust nozzle is fixed on the cylinder and covers the outside of the opening of the central shaft.

[0016] Optionally, the lower stationary grinding disc includes at least two stationary grinding rings with the same center but different diameters. The at least two stationary grinding rings and the lower moving grinding disc form multiple grinding spaces arranged laterally. The multiple grinding spaces constitute the lower grinding channel. A central discharge port is formed between two adjacent stationary grinding rings. The central hole of the innermost stationary grinding ring is the inner discharge port, and the outermost stationary grinding ring is formed between the inner wall of the cylinder and the outer discharge port.

[0017] Optionally, two adjacent static grinding rings are fixedly connected by a plurality of first connecting posts, wherein the static grinding ring with a larger diameter is fixedly connected to the inner wall of the cylinder by a plurality of second connecting posts.

[0018] Optionally, the cross-sections of the static grinding ring, the first connecting post, and the second connecting post are all triangular.

[0019] Optionally, the upper moving grinding disc and the upper stationary grinding disc constitute an upper grinding mechanism, and the lower moving grinding disc and the lower stationary grinding disc constitute a lower grinding mechanism. The lower grinding mechanism is provided in at least two sets, which are arranged vertically at intervals. A downwardly protruding conical lower guide cylinder is provided on the cylinder between two adjacent sets of the lower grinding mechanism. The top opening of the conical lower guide cylinder is connected to the inner wall of the cylinder, and the bottom opening of the conical lower guide cylinder is directly opposite the inner outlet of the lower stationary grinding disc located below. A second air hole is provided on the central shaft between two adjacent sets of the lower grinding mechanism. The second air hole is located below the bottom opening of the conical lower guide cylinder and communicates with the hollow part of the central shaft.

[0020] Optionally, the cylinder includes a cylinder body and a bottom plate disposed at the bottom of the cylinder body. The bottom plate has an upwardly projecting frustum structure, and a material collection trough is formed between the bottom plate and the cylinder body. The discharge port is disposed at the bottom of the material collection trough.

[0021] Optionally, a scraper adapted to the shape of its bottom is provided in the collection trough, and the scraper is fixedly connected to the central shaft through a connecting shaft.

[0022] Optionally, a valve is provided at the feed inlet, and the lithium battery graphite anode material shaping machine further includes a dust removal device. The dust removal device includes a water storage tank and an exhaust pipe. The top of the water storage tank is open, and one end of the exhaust pipe is connected to the inside of the cylinder, while the other end is inserted into the water in the water storage tank from the top opening of the water storage tank.

[0023] Compared with the prior art, the present invention provides a lithium battery graphite anode material shaping machine, which has the following beneficial effects:

[0024] 1. This invention uses an upper moving grinding disc and an upper stationary grinding disc to form a preliminary grinding channel, and a lower moving grinding disc and a lower stationary grinding disc to form a secondary grinding channel. With the air blowing mechanism located between the two, grinding and grading operations can be carried out simultaneously. When graphite falls down from the upper grinding channel, the air blowing mechanism blows the graphite particles that meet the standard directly to the outer discharge port for collection, while the particles that do not meet the standard enter the lower grinding channel for re-grinding. This structure not only optimizes the production process and reduces material loss, but also improves production efficiency and graphite quality.

[0025] 2. The present invention sets a central shaft with a hollow part as an airflow channel and arranges the first air hole on the central shaft. This design allows the blowing mechanism to rotate with the central shaft, thereby achieving an all-round blowing effect and optimizing the classification process of graphite particles falling from the upper grinding channel.

[0026] 3. This invention achieves further precise classification and grinding of substandard graphite particles by setting a lower stationary grinding disc with multiple stationary grinding rings and adding at least one central discharge port between the inner and outer discharge ports. This structure allows the air blowing device to allocate graphite particles to different grinding spaces for specific grinding times based on their weight and the required degree of grinding, optimizing grinding efficiency and reducing the possibility of over-grinding.

[0027] 4. By setting up multiple sets of lower grinding mechanisms and a conical lower guide cylinder, the graphite particles are effectively guided to the next lower grinding mechanism for re-grinding after the initial classification and grinding. At the same time, the second air hole is used to achieve secondary classification, ensuring that only graphite particles that meet the standards can fall to the bottom of the cylinder and be collected, further improving the qualification rate of graphite products. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of Embodiment 3 of the present invention.

[0034] In the diagram: 1. Cylinder body; 100. Cylinder body; 101. Bottom plate; 2. Feed inlet; 3. Discharge outlet; 4. Upper moving grinding disc; 5. Upper stationary grinding disc; 6. Drive device; 7. Lower moving grinding disc; 8. Lower material drop gap; 9. Lower stationary grinding disc; 90. Stationary grinding ring; 91. First connecting column; 92. Second connecting column; 10. Inner discharge port; 92. Second connecting column; 10. Inner discharge port; 11. Outer discharge port; 12. Central shaft; 13. First air hole; 14. Second air hole; 15. Air blowing device; 16. Hollow part; 17. Exhaust nozzle; 18. Middle discharge port; 19. Conical upper guide cylinder; 20. Conical lower guide cylinder; 21. Upper material drop gap; 22. Collection trough; 23. Scraper; 24. Connecting shaft; 25. Valve; 26. Water storage tank; 27. Exhaust pipe; 28. Upper grinding teeth; 29. ​​Lower grinding teeth; 30. Inner hole. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figures 1 to 4 A lithium battery graphite anode material shaping machine includes a cylinder 1, an upper moving grinding disc 4, an upper stationary grinding disc 5, a lower moving grinding disc 7, a lower stationary grinding disc 9, and an air blowing mechanism. The cylinder 1 has an inlet 2 at the top and an outlet 3 at the bottom. The upper moving grinding disc 4 is disposed inside the cylinder 1 and driven to rotate by a drive device 6. The upper stationary grinding disc 5 is fixed to the cylinder 1 and forms an upper grinding channel with the upper moving grinding disc 4. The lower moving grinding disc 7 is fixed relative to the upper moving grinding disc 4, and its outer edge is flush with the inner wall of the cylinder 1. A material drop gap 8 is formed between the upper stationary grinding disc 5 and the lower stationary grinding disc 7; the lower stationary grinding disc 9 is stacked on the lower moving grinding disc 7 and fixed to the cylinder 1, and the stacked part forms a lower grinding channel that extends laterally. The lower stationary grinding disc 9 has an inner outlet 10 that communicates with the lower grinding channel and is used to receive graphite after grinding by the upper grinding channel, and an outer outlet 11 that is directly connected to the material drop gap 8; the air blowing mechanism is located between the upper stationary grinding disc 5 and the lower stationary grinding disc 9 and is configured to blow air from the position of the inner outlet 10 toward the direction of the outer outlet 11. In practice, graphite to be shaped is added into the cylinder 1 through the feed inlet 2. The graphite entering through the feed inlet 2 falls into the upper grinding channel for preliminary grinding. As the pre-ground graphite falls downward from the upper grinding channel, the air blowing mechanism blows air simultaneously. Some graphite particles that meet the grinding particle size standard are blown by the airflow to the outer discharge port 11, which is located at a farther position, and fall into the bottom of the cylinder 1 through the drop gap 8 directly connected to the outer discharge port 11 for collection. Meanwhile, the graphite particles that are not fully ground fall to the bottom of the cylinder 1 under the action of gravity. The graphite enters the lower grinding channel through the inner discharge port 10 for secondary grinding. After secondary grinding, the graphite finally falls into the bottom of the cylinder 1 through the lower discharge gap 8 and is collected. Therefore, this lithium battery graphite anode material shaping machine can classify the graphite particles after the first grinding by airflow, so that the graphite that reaches the standard particle size is directly collected, while the graphite that does not reach the standard particle size is discharged into the lower grinding channel for secondary grinding, thereby avoiding secondary grinding of the graphite that reaches the standard particle size and ensuring the finished product qualification rate of graphite.

[0037] In this embodiment, to improve the shaping effect, the upper moving grinding disc 4 and the upper stationary grinding disc 5 are also stacked. Specifically, the upper moving grinding disc 4 is stacked on top of the upper stationary grinding disc 5, and a laterally extending upper grinding channel is formed between the upper moving grinding disc 4 and the upper stationary grinding disc 5. There is an upper material drop gap 21 between the edge of the upper moving grinding disc 4 and the inner wall of the cylinder 1. An inner hole 30 is provided at the center of the upper stationary grinding disc 5, corresponding to the position of the inner discharge hole of the lower stationary grinding disc 9. The upper grinding channel slopes downward from the side near the upper material drop gap 21 toward the inner hole 30. The upper grinding channel is also provided with The upper grinding teeth 28 are provided, including a part fixed to the upper moving grinding disc 4 and a part fixed to the upper stationary grinding disc 5. The two parts of the upper grinding teeth 28 mesh with each other but do not hinder the relative movement between the upper moving grinding disc 4 and the upper stationary grinding disc 5. In addition, the feed port 2 is provided at the top of the cylinder 1. A downwardly protruding conical upper guide cylinder 19 is provided inside the cylinder 1 located above the upper moving grinding disc 4. The top opening of the conical upper guide cylinder 19 is connected to the inner wall of the cylinder 1, and the bottom opening of the conical upper guide cylinder 19 is directly opposite the center position of the top of the upper moving grinding disc 4. With this setup, when graphite enters the cylinder 1 from the feed inlet 2, the graphite will be collected at the top center of the upper moving grinding disc 4. When the upper moving grinding disc 4 rotates, the graphite will move evenly to the surroundings under the action of centrifugal force, and then enter the upper grinding channel through the upper feeding gap 21 to be ground. During the grinding process, the graphite slides down along the upper grinding channel and finally falls from the inner hole 30 of the upper stationary grinding disc 5 into the inner discharge hole.

[0038] In this exemplary embodiment, the lithium battery graphite anode material shaping machine further includes a central shaft 12 with a hollow portion 16. The driving device 6 drives the central shaft 12 to rotate around its own axis. The central shaft 12 fixes the upper moving grinding disc 4 and the lower moving grinding disc 7 together. The air blowing mechanism includes a first air hole 13 and an air blowing device 15. The first air hole 13 is disposed on the central shaft 12 located between the upper stationary grinding disc 5 and the lower stationary grinding disc 9. The first air hole 13 is connected to the exhaust end of the air blowing device 15 through the hollow portion 16 of the central shaft 12. Using the hollow portion 16 of the central shaft 12 as an airflow channel, this air delivery method does not require additional piping, is simpler and more convenient, and is a preferred air delivery method. Meanwhile, the first air hole 13 is set on the central shaft 12 so that the first air hole 13 can rotate with the central shaft 12, thereby achieving an all-round air blowing effect and better classifying the graphite falling from the upper grinding channel. Of course, in order to further ensure the classification effect, there can be multiple first air holes 13, and multiple first air holes 13 are evenly arranged along the circumference of the central shaft 12.

[0039] In this exemplary embodiment, to improve the stability of the rotation of the central shaft 12, the central shaft 12 is rotatably connected to the cylinder 1. For example, the central shaft 12 and the cylinder 1 can be rotatably connected via bearings. To achieve a good sealed connection between the rotating central shaft 12 and the air blowing device 15, the first end of the central shaft 12 extends through the outside of the cylinder 1 and is provided as an opening. The second end of the central shaft 12 is connected to the drive device 6, which can specifically be a motor, engine, etc. The air blowing device 15 is a blower, and the exhaust end of the blower is provided with an exhaust nozzle 17. The exhaust nozzle 17 is fixed to the cylinder 1 by screws and covers the outside of the opening of the central shaft 12. Of course, the air blowing device 15 is not limited to a blower; for example, the air blowing device 15 can also be an air pump.

[0040] In this exemplary embodiment, the lower stationary grinding disc 9 includes at least two stationary grinding rings 90 with the same center but different diameters. The at least two stationary grinding rings 90 and the lower moving grinding disc 7 form a plurality of grinding spaces arranged laterally. The plurality of grinding spaces constitute a lower grinding channel. A central discharge port 18 is formed between two adjacent stationary grinding rings 90. The central hole of the innermost stationary grinding ring 90 is an inner discharge port 10. An outer discharge port 11 is formed between the outermost stationary grinding ring 90 and the inner wall of the cylinder 1. By adding at least one intermediate discharge port 18 between the inner discharge port 10 and the outer discharge port 11, the blowing force of the blowing device 15 can be controlled to further classify the substandard graphite. This allows the heavier graphite to selectively fall into the inner discharge port 10 and different intermediate discharge ports 18 according to their weight. In other words, the closer the intermediate discharge port 18 is to the inner discharge port 10, the longer the graphite is ground, and vice versa. This not only ensures that the graphite is fully ground, but also avoids over-grinding, thereby further improving the finished product qualification rate of graphite.

[0041] In addition, in this example, in order to improve the grinding effect of graphite in the lower grinding channel, each stationary grinding ring 90 and the lower moving grinding disc 7 is provided with a lower grinding tooth 29. The lower grinding tooth 29 includes a part fixed to the stationary grinding ring 90 and a part fixed to the lower moving grinding disc 7. The two parts of the lower grinding tooth 29 mesh with each other and do not hinder the relative movement between the lower moving grinding disc 7 and the lower stationary grinding disc 9.

[0042] In this exemplary embodiment, to achieve the connection and fixation between the lower stationary grinding disc 9 and the cylinder 1, two adjacent stationary grinding rings 90 are fixedly connected by a plurality of first connecting posts 91, wherein the stationary grinding ring 90 with a larger diameter is fixedly connected to the inner wall of the cylinder 1 by a plurality of second connecting posts 92. The cross-sections of the stationary grinding ring 90, the first connecting posts 91, and the second connecting posts 92 are all triangular. By setting the cross-sections of the stationary grinding ring 90, the first connecting posts 91, and the second connecting posts 92 to triangular structures, graphite residue on the lower stationary grinding disc 9 can be reduced.

[0043] Example 2: Please refer to Figure 5 The difference from Embodiment 1 is that, in this exemplary embodiment, the upper moving grinding disc 4 and the upper stationary grinding disc 5 constitute the upper grinding mechanism, and the lower moving grinding disc 7 and the lower stationary grinding disc 9 constitute the lower grinding mechanism. The lower grinding mechanism is provided in at least two sets, and the at least two sets of lower grinding mechanisms are arranged vertically at intervals. A downwardly protruding conical lower guide cylinder 20 is provided on the cylinder 1 located between two adjacent sets of lower grinding mechanisms. The top opening of the conical lower guide cylinder 20 is connected to the inner wall of the cylinder 1, and the bottom opening of the conical lower guide cylinder 20 is directly opposite the inner outlet 10 of the lower stationary grinding disc 9 located below. A second air hole 14 is provided on the central shaft 12 located between two adjacent sets of lower grinding mechanisms. The second air hole 14 is located below the bottom opening of the conical lower guide cylinder 20 and communicates with the inner hollow portion 16 of the central shaft 12. By setting up multiple sets of lower grinding mechanisms and a conical lower guide cylinder 20, the graphite particles that are larger and do not meet the standards after being ground by the upper lower grinding mechanism will be collected along the conical lower guide cylinder 20 and fall above the inner discharge port 10 of the lower stationary grinding disc 9 of the lower grinding mechanism located below. The gas blown out from the second air hole 14 will classify these graphite particles a second time. The graphite particles that do not meet the standards after secondary classification will be ground again by the lower grinding mechanism located below. The specific number of lower grinding mechanisms can be set according to the actual situation, as long as it is ensured that the graphite can be fully ground.

[0044] In this exemplary embodiment, the cylinder 1 includes a cylinder body 100 and a bottom plate 101 disposed at the bottom of the cylinder body 100. The bottom plate 101 has an upwardly projecting frustum structure, and a material collection groove 22 is formed between the bottom plate 101 and the cylinder body 100. The discharge port 3 is disposed at the bottom of the material collection groove 22. Graphite falling into the bottom of the cylinder 1 through the drop gap 8 can slide down along the bottom plate 101 to the edge of the bottom of the cylinder 1, thereby allowing the graphite in the cylinder 1 to be better cleaned out at the discharge port 3.

[0045] To facilitate the removal of graphite from the collecting trough 22, in this exemplary embodiment, a scraper 23 adapted to the bottom shape of the collecting trough 22 is provided inside the collecting trough 22. The scraper 23 is fixedly connected to the central shaft 12 via a connecting shaft 24. During the entire grinding and shaping process, the central shaft 12 drives the scraper 23 to rotate. The scraper 23 rotates along the bottom of the collecting trough 22, which can scrape the graphite at the bottom of the collecting trough 22 out of the discharge port 3, preventing graphite from accumulating in the collecting trough 22.

[0046] Example 3: Please refer to Figure 6Unlike embodiment 2, in this exemplary embodiment, a valve 25 is provided at the feed inlet 2, and the lithium battery graphite anode material shaping machine also includes a dust removal device. The dust removal device includes a water storage tank 26 and an exhaust pipe 27. The top of the water storage tank 26 is open, and one end of the exhaust pipe 27 is connected to the inside of the cylinder 1, while the other end is inserted into the water inside the water storage tank 26 through the top opening. With this configuration, during the graphite grinding process, the valve 25 at the feed inlet 2 is closed, and the airflow passes through the exhaust pipe 27 and is discharged into the water inside the water storage tank 26. The water can reduce the graphite dust in the airflow, thereby achieving the purpose of dust reduction.

[0047] Working principle: First, the graphite to be shaped is added through the feed inlet 2 at the top of the cylinder 1. The graphite entering the cylinder 1 is collected at the center of the top of the upper moving grinding disc 4 by the action of the conical upper guide cylinder 19. Then, the upper moving grinding disc 4 is driven to rotate by the drive device 6, using centrifugal force to move the graphite evenly in all directions, and it enters the upper grinding channel for preliminary grinding through the upper drop gap 21. During the downward fall of the graphite after preliminary grinding, the air blowing mechanism exhausts air from the first air hole 13 on the central shaft 12, using the airflow to blow graphite particles that meet the particle size standard to the outer discharge port 11, where they fall directly into the bottom of the cylinder 1 for collection. Graphite particles that do not meet the standard continue to fall downward under gravity, entering the lower grinding channel through the inner discharge port 10 for secondary grinding. Finally, all graphite that meets the standard particle size is collected in the collection trough 22 at the bottom of the cylinder 1. The graphite is then removed from the discharge port 3 by a rotating scraper 23. Meanwhile, in order to reduce the impact of dust generated during the grinding process on the environment, a valve 25 is installed at the feed inlet 2 to close it tightly and is connected to a dust removal device to introduce the dust-laden airflow into the water in the water storage tank 26 to reduce dust.

[0048] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shaping machine for graphite anode materials in lithium batteries, characterized in that, include: The cylinder (1) has a feed inlet (2) at the top and a discharge outlet (3) at the bottom; The upper grinding disc (4) is located inside the cylinder (1) and is driven to rotate by the drive device (6); The upper stationary grinding disc (5) is fixed on the cylinder (1) and forms an upper grinding channel with the upper moving grinding disc (4); The lower moving grinding disc (7) is fixed relative to the upper moving grinding disc (4), and its outer edge forms a material drop gap (8) between it and the inner wall of the cylinder (1); The lower stationary grinding disc (9) is stacked on the lower moving grinding disc (7) and fixed to the cylinder (1). The stacked portion forms a lower grinding channel that extends laterally. The lower stationary grinding disc (9) has an inner outlet (10) that communicates with the lower grinding channel and is used to receive graphite after grinding by the upper grinding channel, and an outer outlet (11) that is directly connected to the lower material drop gap (8). as well as An air blowing mechanism is provided between the upper stationary grinding disc (5) and the lower stationary grinding disc (9) and is configured to blow air from the position of the inner outlet (10) toward the outer outlet (11); It also includes a central shaft (12) having a hollow portion (16), the driving device (6) drives the central shaft (12) to rotate about its own axis, the central shaft (12) fixes the upper moving grinding disc (4) and the lower moving grinding disc (7) together, the air blowing mechanism includes a first air hole (13) and an air blowing device (15), the first air hole (13) is disposed on the central shaft (12) located between the upper stationary grinding disc (5) and the lower stationary grinding disc (9), the first air hole (13) is connected to the exhaust end of the air blowing device (15) through the hollow portion (16) of the central shaft (12).

2. The lithium battery graphite anode material shaping machine according to claim 1, characterized in that: The central shaft (12) is rotatably connected to the cylinder (1). The first end of the central shaft (12) extends through the outside of the cylinder (1) and is open. The second end of the central shaft (12) is connected to the drive device (6). The blowing device (15) is a blower. The exhaust end of the blower is provided with an exhaust nozzle (17). The exhaust nozzle (17) is fixed on the cylinder (1) and covers the outside of the opening of the central shaft (12).

3. The lithium battery graphite anode material shaping machine according to claim 1, characterized in that: The lower stationary grinding disc (9) includes at least two stationary grinding rings (90) with the same center and different diameters. The at least two stationary grinding rings (90) and the lower moving grinding disc (7) form a plurality of grinding spaces arranged laterally. The plurality of grinding spaces constitute the lower grinding channel. A central discharge port (18) is formed between two adjacent stationary grinding rings (90). The central hole of the innermost stationary grinding ring (90) is the inner discharge port (10). The outermost stationary grinding ring (90) and the inner wall of the cylinder (1) form the outer discharge port (11).

4. A lithium battery graphite anode material shaping machine according to claim 3, characterized in that: Two adjacent static grinding rings (90) are fixedly connected by a plurality of first connecting posts (91), wherein the static grinding ring (90) with a larger diameter is fixedly connected to the inner wall of the cylinder (1) by a plurality of second connecting posts (92).

5. A lithium battery graphite anode material shaping machine according to claim 4, characterized in that: The static grinding ring (90), the first connecting post (91), and the second connecting post (92) all have triangular cross-sections.

6. A lithium battery graphite anode material shaping machine according to claim 1 or 2, characterized in that: The upper moving grinding disc (4) and the upper stationary grinding disc (5) constitute the upper grinding mechanism, and the lower moving grinding disc (7) and the lower stationary grinding disc (9) constitute the lower grinding mechanism. The lower grinding mechanism is provided in at least two sets, and the at least two sets of lower grinding mechanisms are arranged vertically at intervals. A conical lower guide cylinder (20) protruding downward is provided on the cylinder (1) located between two adjacent sets of lower grinding mechanisms. The top opening of the conical lower guide cylinder (20) is connected to the inner wall of the cylinder (1), and the bottom opening of the conical lower guide cylinder (20) is directly opposite to the inner outlet (10) of the lower stationary grinding disc (9) located below. A second air hole (14) is provided on the central shaft (12) located between two adjacent sets of lower grinding mechanisms. The second air hole (14) is located below the bottom opening of the conical lower guide cylinder (20) and communicates with the hollow part (16) of the central shaft (12).

7. A lithium battery graphite anode material shaping machine according to claim 1 or 2, characterized in that: The cylinder (1) includes a cylinder body (100) and a bottom plate (101) located at the bottom of the cylinder body (100). The bottom plate (101) is a truncated cone structure protruding upwards. A material collection trough (22) is formed between the bottom plate (101) and the cylinder body (100). The discharge port (3) is located at the bottom of the material collection trough (22).

8. A lithium battery graphite anode material shaping machine according to claim 7, characterized in that: The material collection trough (22) is provided with a scraper (23) adapted to its bottom shape, and the scraper (23) is fixedly connected to the central shaft (12) through a connecting shaft (24).

9. A lithium battery graphite anode material shaping machine according to any one of claims 1 to 5, characterized in that: A valve (25) is provided at the feed inlet (2). The lithium battery graphite anode material shaping machine also includes a dust removal device. The dust removal device includes a water storage tank (26) and an exhaust pipe (27). The top of the water storage tank (26) is open. One end of the exhaust pipe (27) is connected to the inside of the cylinder (1), and the other end is inserted into the water in the water storage tank (26) from the top opening of the water storage tank (26).

Images