A kind of spherical mill for producing lithium ion battery negative material

Abstract

The utility model relates to lithium ion battery negative material production device technical field, and disclose a kind of spherical mill for lithium ion battery negative material production, including drive base, and grinding cylinder is rotatably installed on the drive base;By rotating limit ring and cooperating with pressure bolt to realize positioning, the positioning slot hole will be misaligned with relative movable slot hole at this time, and further change the width of overlapping gap between fixed slot hole and movable slot hole, the gap is the discharge hole of grinding material, when using, the size of discharge hole width is flexibly controlled, so that spherical mill can satisfy the demand of different negative material particle grinding, by controlling the inclined hydraulic cylinder to make drive base rotate around bracket under the clamping of limit frame, make grinding cylinder keep inclined state, further control electric telescopic rod to make support move downward to be in contact with the inner wall of guide plate and grinding cylinder, control grinding cylinder rotation simultaneously, grinding ball can be discharged quickly from grinding cylinder under the action of guide plate.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium-ion battery anode material production equipment, specifically a spherical mill for lithium-ion battery anode material production. Background Technology

[0002] A lithium-ion battery is a rechargeable battery that achieves charging and discharging by the migration of lithium ions between the positive and negative electrodes. The negative electrode material, as the main component for storing lithium ions in the battery, is mainly divided into carbon materials and non-carbon materials. In the production process of lithium-ion battery negative electrode materials, mechanical force is used to refine the particles of materials such as graphite to the micron or nanometer scale in order to improve their electrochemical performance. This process requires the use of a spherical mill for the production of negative electrode materials.

[0003] Chinese Patent Publication No. CN215694637U discloses a spherical mill suitable for producing lithium-ion battery anode materials. The spherical mill includes a cylinder and a feed hopper. A cavity is formed inside the cylinder. A connecting cylinder is fixed to the top of the cylinder and communicates with the cavity. A feeding device is connected to one end of the connecting cylinder. Multiple circular holes communicating with the cavity are formed at the bottom of the cylinder. A crushing device and a rolling device are movably connected from top to bottom to the inner walls of both sides of the cylinder. The rolling device includes a connecting shaft movably connected to the inner walls of both sides of the cylinder and two circular plates, with the circular plates fixed to both sides of the connecting shaft. This invention includes a crushing device, a rolling device, a first fixed shaft, a roller, a second fixed shaft, and scrapers. The baffles and protrusions on the crushing device can impact and crush the graphite flowing down from the connecting cylinder. The crushed graphite is then further pulverized under the pressure of the roller.

[0004] The aforementioned spherical mill has the effect of multi-stage crushing of negative electrode materials. However, in order to ensure sufficient grinding of negative electrode materials, a spherical mill usually uses grinding balls of various sizes. When a grinding ball is used up, it needs to be picked up and replaced with grinding balls of other sizes. However, it is difficult and time-consuming to pick up the grinding balls from the spherical mill. At the same time, traditional spherical mills can only grind negative electrode material particles smaller than or equal to the discharge port size, which cannot meet the grinding requirements of large-particle negative electrode materials. Therefore, it is necessary to provide a spherical mill for the production of lithium-ion battery negative electrode materials. Utility Model Content

[0005] The purpose of this invention is to provide a spherical mill for the production of lithium-ion battery anode materials, so as to solve the problems of time-consuming and laborious replacement of grinding balls in existing spherical mills, and the inability to simultaneously meet the grinding requirements of different anode material particles.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a spherical mill for producing lithium-ion battery negative electrode materials, comprising a drive base, a grinding cylinder rotatably mounted on the drive base, and a filter material mechanism provided on the grinding cylinder; the filter material mechanism includes two hoop rings, which are fixedly mounted side by side on the outside of the grinding cylinder, and a limiting ring is rotatably mounted between the two hoop rings and the grinding cylinder; the outside of the grinding cylinder has several fixed slots, and the outside of the limiting ring has several movable slots; two pressure bolts are threaded through one side of the hoop rings.

[0007] Preferably, the fixed slot is centrally located between the two side rings, and the number of the fixed slots is the same as the number of movable slots.

[0008] Preferably, a plurality of fixed slots are equidistantly formed on the grinding cylinder, a plurality of movable slots are equidistantly formed on the limiting ring, and the distance between the plurality of movable slots is greater than the width of the movable slots.

[0009] Preferably, the limiting ring has protrusions on both sides, and the protrusions are clamped between the two pressure bolts.

[0010] Preferably, a ball guide mechanism is provided on the drive base and the grinding cylinder. The ball guide mechanism includes a bracket. One end of the drive base is rotatably mounted on the bracket. Limiting frames are fixedly mounted on both sides of the bracket. An inclined hydraulic cylinder is rotatably mounted between one end of the bracket and the drive base. An electric telescopic rod is fixedly mounted on the other end of the drive base. A bracket is fixedly mounted on the output end of the electric telescopic rod. A guide plate is fixedly mounted on the lower side of the bracket.

[0011] Preferably, the limiting frame has an arc-shaped groove centered at the connection between the bracket and the drive base, and the two sides of the drive base are embedded and slidably installed in the arc-shaped groove.

[0012] Preferably, the bracket is slidably mounted through one end of the drive base, and the front end of the guide plate is composed of an irregularly shaped plate that is inclined to fit the inner wall of the grinding cylinder.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1) This spherical mill for producing lithium-ion battery anode materials is positioned by rotating a limiting ring and using a pressure bolt. At this time, the positioning slot will be misaligned relative to the movable slot, thereby changing the width of the overlap gap between the fixed slot and the movable slot. This gap is the discharge hole of the grinding material. When in use, the size of the discharge hole can be flexibly controlled so that the spherical mill can meet the grinding needs of different anode material particles.

[0015] 2) The spherical mill for producing lithium-ion battery anode materials controls the tilting hydraulic cylinder to make the drive base rotate around the bracket under the clamping of the limit frame, so that the grinding cylinder is kept in an inclined state. Further control of the electric telescopic rod makes the bracket move downward so that the guide plate fits against the inner wall of the grinding cylinder. At the same time, control the rotation of the grinding cylinder so that the grinding balls can be quickly discharged from the grinding cylinder under the action of the guide plate. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a spherical mill used for producing lithium-ion battery negative electrode materials in an embodiment of this utility model;

[0017] Figure 2 This is a cross-sectional view of the spherical mill in an embodiment of this utility model;

[0018] Figure 3 This is a cross-sectional view of the drive base in an embodiment of the present invention;

[0019] Figure 4 This is a cross-sectional view of the filter media mechanism in an embodiment of the present invention.

[0020] Figure 5 As an embodiment of this utility model Figure 3 Enlarged view of A in the middle;

[0021] Figure 6 This is a three-dimensional structural exploded view of the ball guide mechanism in an embodiment of this utility model;

[0022] Figure 7 This is a cross-sectional view of the grinding cylinder in an embodiment of the present invention;

[0023] Figure 8 This is a three-dimensional structural diagram of the bracket and guide plate in an embodiment of this utility model.

[0024] In the diagram: 1. Drive base; 2. Grinding cylinder; 3. Filter media mechanism; 301. Hoop ring; 302. Limiting ring; 303. Fixed slot; 304. Movable slot; 305. Pressure bolt; 4. Ball guide mechanism; 401. Bracket; 402. Tilting hydraulic cylinder; 403. Limiting frame; 404. Electric telescopic rod; 405. Bracket; 406. Guide plate. 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] Example 1

[0027] Combination Figures 1-5 A spherical mill for producing lithium-ion battery negative electrode materials includes a drive base 1, a grinding cylinder 2 rotatably mounted on the drive base 1, and a filter material mechanism 3 provided on the grinding cylinder 2. The filter material mechanism 3 includes two hoop rings 301, which are fixedly mounted side by side on the outside of the grinding cylinder 2. A limiting ring 302 is rotatably mounted between the two hoop rings 301 and the grinding cylinder 2. The outside of the grinding cylinder 2 is provided with several fixed slots 303, and the outside of the limiting ring 302 is provided with several movable slots 304. Two pressure bolts 305 are threaded through one side of the hoop rings 301.

[0028] The fixed slots 303 are centrally located between the two hoop rings 301, and the number of fixed slots 303 and the number of movable slots 304 are the same. The fixed slots 303 are equidistantly opened on the grinding cylinder 2, and the movable slots 304 are equidistantly opened on the limiting ring 302. Due to the number of fixed slots 303 and movable slots 304 and their relationship, the overlap gap between adjacent fixed slots 303 and movable slots 304 is kept consistent, and the distance between the movable slots 304 is greater than the width of the movable slots 304, ensuring that the movable slots 304 can be completely offset from the fixed slots 303. The limiting ring 302 has protrusions on both sides, and the protrusions are clamped between two pressure bolts 305. By controlling the pressure bolts 305 on the protrusion side, the limiting ring 302 can be rotated and positioned relative to the grinding cylinder 2.

[0029] Example 2

[0030] See Figures 6-8 A ball guide mechanism 4 is provided on the drive base 1 and the grinding cylinder 2. The ball guide mechanism 4 includes a bracket 401. One end of the drive base 1 is rotatably mounted on the bracket 401. Limiting brackets 403 are fixedly mounted on both sides of the bracket 401. An inclined hydraulic cylinder 402 is rotatably mounted between one end of the bracket 401 and the drive base 1. An electric telescopic rod 404 is fixedly mounted on the other end of the drive base 1. A bracket 405 is fixedly mounted on the output end of the electric telescopic rod 404. A guide plate 406 is fixedly mounted on the lower side of the bracket 405.

[0031] The limiting frame 403 has an arc-shaped groove centered at the connection between the bracket 401 and the drive base 1, and the two sides of the drive base 1 are embedded and slidably installed in the arc-shaped groove. The limiting frame 403 provides stability for the drive base 1 when it rotates relative to the bracket 401. The bracket 405 is slidably installed through one end of the drive base 1, so that the bracket 405 can only move up or down relative to the grinding cylinder 2 under the action of the electric telescopic rod 404. The front end of the guide plate 406 is composed of an irregularly shaped plate that is inclined to fit the inner wall of the grinding cylinder 2. When the electric telescopic rod 404 is controlled to move the bracket 405 downward so that the guide plate 406 is in contact with the inner wall of the grinding cylinder 2, the guide plate 406 will act on the grinding ball and discharge it from the grinding cylinder 2.

[0032] In actual operation, thanks to the number and positional relationship between the fixed slot 303 and the movable slot 304, positioning is achieved by rotating the limiting ring 302 and cooperating with the pressure bolt 305, thereby changing the width of the overlapping gap between the fixed slot 303 and the movable slot 304. This gap is the discharge hole of the grinding material. When in use, the size of the discharge hole width can be flexibly controlled so that the ball mill can meet the grinding needs of different negative electrode material particles.

[0033] After the negative electrode material has been ground and discharged, the tilting hydraulic cylinder 402 is controlled to make the drive base 1 rotate around the bracket 401 under the clamping of the limit frame 403, so that the grinding cylinder 2 is kept in an inclined state. The electric telescopic rod 404 is further controlled to make the bracket 405 move downward so that the guide plate 406 is in contact with the inner wall of the grinding cylinder 2. At the same time, the grinding cylinder 2 is controlled to rotate, so that a number of grinding balls can be quickly discharged from the grinding cylinder 2 under the action of the guide plate 406.

[0034] 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 the 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 spherical mill for producing lithium-ion battery negative electrode materials, comprising a drive base (1), wherein a grinding cylinder (2) is rotatably mounted on the drive base (1), characterized in that: The grinding cylinder (2) is provided with a filter material mechanism (3); The filter media mechanism (3) includes two hoop rings (301), which are fixedly installed side by side on the outside of the grinding cylinder (2). A limiting ring (302) is rotatably installed between the two hoop rings (301) and the grinding cylinder (2). The grinding cylinder (2) has several fixed slots (303) on its outside. The limiting ring (302) has several movable slots (304) on its outside. Two pressure bolts (305) are threaded through one side of the hoop ring (301).

2. The spherical mill for producing lithium-ion battery anode materials according to claim 1, characterized in that: The fixed slot (303) is centrally located between the two side rings (301), and the number of the fixed slots (303) is the same as the number of movable slots (304).

3. The spherical mill for producing lithium-ion battery anode materials according to claim 2, characterized in that: A plurality of fixed slots (303) are equidistantly provided on the grinding cylinder (2), and a plurality of movable slots (304) are equidistantly provided on the limiting ring (302), and the distance between the plurality of movable slots (304) is greater than the width of the movable slots (304).

4. The spherical mill for producing lithium-ion battery anode materials according to claim 1, characterized in that: The limiting ring (302) has protrusions on both sides, and the protrusions are clamped between two pressure bolts (305).

5. A spherical mill for producing lithium-ion battery anode materials according to claim 1, characterized in that: A ball guide mechanism (4) is provided on the drive base (1) and the grinding cylinder (2). The ball guide mechanism (4) includes a bracket (401). One end of the drive base (1) is rotatably mounted on the bracket (401). Limiting frames (403) are fixedly mounted on both sides of the bracket (401). An inclined hydraulic cylinder (402) is rotatably mounted between one end of the bracket (401) and the drive base (1). An electric telescopic rod (404) is fixedly mounted on the other end of the drive base (1). A bracket (405) is fixedly mounted on the output end of the electric telescopic rod (404). A guide plate (406) is fixedly mounted on the lower side of the bracket (405).

6. A spherical mill for producing lithium-ion battery anode materials according to claim 5, characterized in that: The limiting frame (403) has an arc-shaped groove centered at the connection between the bracket (401) and the drive base (1), and the two sides of the drive base (1) are embedded and slidably installed in the arc-shaped groove.

7. A spherical mill for producing lithium-ion battery anode materials according to claim 6, characterized in that: The bracket (405) is slidably mounted through one end of the drive base (1), and the front end of the guide plate (406) is composed of an irregularly shaped plate that is inclined to fit the inner wall of the grinding cylinder (2).

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