CN220678010U - Colloid mill for lithium battery material - Google Patents

Abstract

The utility model discloses a colloid mill for lithium battery materials, which comprises a first grinding disc and a second grinding disc which are oppositely arranged, wherein the first grinding disc is arranged on a top cover, and the second grinding disc is arranged on a cylinder body hinged with the top cover; when the top cover is turned over to the opening end of the cylinder body, a grinding cavity is formed between the top cover and the cylinder body in a surrounding manner; a cylinder core column extending into the grinding cavity is arranged in the cylinder body; a main shaft is arranged in the cylinder core column, the main shaft is connected to the motor through a sleeve part, a grinding disc base, a compression ring and a ceramic part are sequentially sleeved on the periphery of one end of the main shaft extending into the grinding cavity, a second grinding disc is clamped between the grinding disc base and the compression ring, and a plurality of ceramic paddles are arranged on the lower side of the grinding disc base; the top cover is provided with a feed hopper, and the cylinder body is provided with a discharge cylinder. The utility model aims to provide a colloid mill for lithium battery materials, which can effectively increase the grinding efficiency of the lithium battery materials and can effectively prevent magnetic foreign matters from being doped in the ground lithium battery materials when the rotating speed of a grinding disc is increased.

Description

Colloid mill for lithium battery material

Technical Field

The utility model relates to the technical field of lithium battery material processing, in particular to a colloid mill for lithium battery materials.

Background

An important influencing aspect of the safety performance of lithium ion batteries is the presence of magnetic foreign bodies in the electrode materials thereof. The magnetic foreign matter mainly exists in the form of simple substances such as Fe, cr, ni, zn or oxides, and exists in the product in the ppb order, so that the battery is damaged to different degrees, and the safety is reduced.

In the process of preparing the lithium ion battery, a colloid mill is required to be used for further processing lithium electric materials, and the existing colloid mill can only enter a grinding area inside the colloid mill under the action of self gravity and the collision action of a grinding disc when working, so that the grinding efficiency of the lithium electric materials is difficult to be effectively increased when the rotating speed of the grinding disc is improved, and meanwhile, a nut for fixing the grinding disc on a main shaft and a paddle for assisting the discharge of the lithium electric materials are used in the colloid mill, so that the lithium ion battery is easy to wear and easily generate magnetic foreign matters after long-time operation, and the safety of the lithium ion battery is difficult to be ensured.

Disclosure of Invention

The utility model aims to provide a colloid mill for lithium battery materials, which can effectively increase the grinding efficiency of the lithium battery materials and can effectively prevent magnetic foreign matters from being doped in the ground lithium battery materials when the rotating speed of a grinding disc is increased.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the colloid mill for the lithium battery material comprises a first millstone and a second millstone which are oppositely arranged, wherein through holes are formed in the first millstone and the second millstone, the first millstone is arranged on a top cover, and the second millstone is arranged on a cylinder body hinged with the top cover;

when the top cover is turned over to the opening end of the cylinder body, a grinding cavity is formed between the top cover and the cylinder body in a surrounding mode;

a cylinder core column extending into the grinding cavity is arranged in the cylinder body, and the cylinder core column is a hollow cylinder;

a main shaft is arranged in the cylinder core column, the main shaft is connected to a motor through a sleeve part, a grinding disc base, a compression ring and a ceramic part are sequentially sleeved on the periphery of one end of the main shaft extending to the grinding cavity, the second grinding disc is clamped between the grinding disc base and the compression ring, the ceramic part is in threaded connection with the end part of the main shaft, and a plurality of ceramic paddles are arranged on the lower side of the grinding disc base;

the top cover is provided with a feed hopper communicated with the through hole, the barrel is provided with a discharge barrel communicated with the grinding cavity, and the first grinding disc, the second grinding disc and the main shaft are coaxially arranged.

In a preferred embodiment of the present utility model, a plurality of groups of grinding grooves are formed on opposite sides of the first grinding disc and the second grinding disc, the distance between the opposite sides of the first grinding disc and the second grinding disc gradually decreases from the central axis to the direction extending around, and the opposite sides of the first grinding disc and the second grinding disc are arc-shaped.

In a preferred embodiment of the utility model, an annular ceramic seat is arranged on one side of the grinding disc base, facing the second grinding disc, and the outer edge of the annular ceramic seat is coated on the periphery of the second grinding disc.

In a preferred embodiment of the utility model, the ceramic piece comprises a fastening nut in threaded connection with the end part of the main shaft and a ceramic sleeve sleeved on the fastening nut, wherein a plurality of screws propped against the periphery of the ceramic piece are screwed on the fastening nut, a plurality of distributing wing plates are uniformly arranged on the periphery of the ceramic sleeve at intervals, and each distributing wing plate is tangential to the periphery of the ceramic sleeve.

In a preferred embodiment of the present utility model, the ceramic blade includes a first plate and a second plate, an included angle is formed between the first plate and the second plate, and a rib plate perpendicular to the first plate is arranged between the first plate and the second plate.

In a preferred embodiment of the utility model, a limiting block is arranged on the periphery of the top cover, a fastening handle corresponding to the limiting block is arranged on the periphery of the cylinder body, the fastening handle is rotatably connected to the cylinder body, and a limiting plate capable of being abutted against the upper side of the limiting block is arranged on the fastening handle.

Advantageous effects

(1) When the top cover is turned over to the position right above the cylinder body, a grinding cavity is formed between the top cover and the cylinder body, lithium battery materials enter the position right above the top cover from the feeding hopper between a first grinding disc and a second grinding disc in the grinding cavity, a motor driving main shaft drives the second grinding disc to rotate, the first grinding disc is fixed on the top cover, the second grinding disc and a ceramic piece rotate at a high speed, the lithium battery materials entering the grinding cavity are stirred down, the lithium battery materials can move towards a grinding area between the first grinding disc and the second grinding disc rapidly, and then the grinding efficiency of the lithium battery materials can be effectively increased by increasing the rotating speed.

(2) Through connect a ceramic sleeve in fastening nut's periphery to set up the branch material pterygoid lamina in ceramic sleeve's periphery, not only can increase the work efficiency of colloid mill when the main shaft high-speed rotates, ceramic sleeve and ceramic paddle itself have good wearability simultaneously, not only can increase life, when ceramic sleeve, ceramic paddle are impaired in the friction, still can not produce magnetic foreign matter, can effectually guarantee lithium ion battery's security.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic view showing the structure of a colloid mill according to a preferred embodiment of the present utility model;

FIG. 2 is a schematic view of the partial enlarged structure at B of FIG. 1 in a preferred embodiment of the utility model;

FIG. 3 is a schematic top view of FIG. 1 in a preferred embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of FIG. 3 at A-A in accordance with a preferred embodiment of the present utility model;

FIG. 5 is a schematic view of the enlarged partial structure of FIG. 4 at C in accordance with the preferred embodiment of the present utility model;

FIG. 6 is a schematic view of the ceramic blade in a preferred embodiment of the present utility model mounted to the bottom of the base of the abrasive disc;

FIG. 7 is a schematic view of the structure of the first abrasive disc or the second abrasive disc in the preferred embodiment of the present utility model;

FIG. 8 is a schematic view of the structure of a ceramic member in a preferred embodiment of the utility model;

1, a first grinding disc; 2. a second abrasive disc; 3. a top cover; 4. a cylinder; 5. a barrel stem; 6. a main shaft; 7. a sleeve member; 8. a motor; 9. a grinding disc base; 10. a clamp ring; 11. a ceramic member; 12. ceramic paddles; 13. a feed hopper; 14. a discharging cylinder; 15. grinding the groove; 16. an annular ceramic seat; 17. a fastening nut; 18. a ceramic sleeve; 19. a screw; 20. a material distributing wing plate; 21. a limiting block; 22. a fastening handle; 23. a limiting plate; 1201. a first plate; 1202. a second plate; 1203. and rib plates.

Detailed Description

The utility model will now be described in further detail with reference to the drawings and examples, which are simplified schematic illustrations of the basic structure of the utility model, which are presented only by way of illustration, and thus show only the structures that are relevant to the utility model.

In this embodiment, if a directional instruction (such as up, down, bottom, top, etc.) is provided, the directional instruction is merely used to explain the relative positional relationship between the components, the movement condition, etc. in a certain specific posture, and if the specific posture is changed, the directional instruction is changed accordingly. The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. Unless specifically stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1-8, a colloid mill for lithium battery materials comprises a first grinding disc 1 and a second grinding disc 2 which are oppositely arranged, wherein through holes are formed in the first grinding disc 1 and the second grinding disc 2, the first grinding disc 1 is arranged on a top cover 3, and the second grinding disc 2 is arranged on a cylinder 4 hinged with the top cover 3;

when the top cover 3 is turned over to the opening end of the cylinder body 4, a grinding cavity is formed between the top cover 3 and the cylinder body 4 in a surrounding manner;

a cylinder core column 5 extending into the grinding cavity is arranged in the cylinder body 4, and the cylinder core column 5 is a hollow cylinder;

a main shaft 6 is arranged in the cylinder core column 5, the main shaft 6 is connected to a motor 8 through a sleeve member 7, a grinding disc base 9, a compression ring 10 and a ceramic member 11 are sequentially sleeved on the periphery of one end of the main shaft 6 extending into the grinding cavity, the second grinding disc 2 is clamped between the grinding disc base 9 and the compression ring 10, the ceramic member 11 is in threaded connection with the end part of the main shaft 6, and a plurality of ceramic paddles 12 are arranged on the lower side of the grinding disc base 9;

the top cover 3 is provided with a feed hopper 13 communicated with the through hole, the cylinder body 4 is provided with a discharge cylinder 14 communicated with the grinding cavity, and the first grinding disc 1, the second grinding disc 2 and the main shaft 6 are coaxially arranged.

Specifically, the top cover 3 is hinged with the cylinder 4, and the top cover 3 can be turned over to be horizontal with the cylinder 4, so that maintenance and replacement of wearing parts of the colloid mill are facilitated. When the top cover 3 is turned over to be right above the cylinder body 4, the top cover 3 and the cylinder body 4 form a barrel-shaped structure, a grinding cavity is formed between the top cover 3 and the cylinder body 4 at the moment, and the first grinding disc 1 fixed on the top cover 3 and the second grinding disc 2 on the grinding disc base 9 at the moment show a vertically opposite position relationship. When the lithium battery material is poured from the opening end of the feed hopper 13, the lithium battery material can enter a grinding area between the first grinding disc 1 and the second grinding disc 2 through the through hole on the first grinding disc 1, and the grinding area is the area between the first grinding disc 1 and the second grinding disc 2 which is closest to each other. Along with motor 8 drive main shaft 6 drives ceramic part 11, the high-speed rotation of second mill 2, second mill 2 and ceramic part 11 rotate at a high speed, get into the lithium electricity material of grinding the intracavity and stir down and under the effect of centrifugal force at ceramic part 11, can move towards first mill 1, the grinding district between the second mill 2 fast, can effectually increase the grinding efficiency of lithium electricity material through increasing the rotational speed of main shaft 6, ceramic part 11 and ceramic paddle 12 itself have good wearability simultaneously, not only can increase life, when the friction is impaired, can not produce the magnetism foreign matter, can effectually guarantee lithium ion battery's security.

Further, as shown in fig. 5 and 7, in order to further increase the grinding efficiency of the colloid mill, a plurality of groups of grinding grooves 15 are formed on opposite sides of the first grinding disc 1 and the second grinding disc 2, the distance between the opposite sides of the first grinding disc 1 and the second grinding disc 2 gradually decreases from the central axis to the extending direction around, and the opposite sides of the first grinding disc 1 and the second grinding disc 2 are arc-shaped. The lithium battery material moves towards the position with the closest distance between the first grinding disc 1 and the second grinding disc 2 under the fluctuation of the ceramic piece 11, and the staggered grinding grooves 15 on the first grinding disc 1 and the second grinding disc 2 can drive the lithium battery material to move and extrude, shear and grind the lithium battery material into particles with smaller granularity. The ground lithium battery material may fall to the bottom of the grinding chamber.

In the above embodiment, the ceramic member 11 includes a fastening nut 17 screwed to the end of the spindle 6, and a ceramic sleeve 18 sleeved on the fastening nut 17, where a plurality of screws 19 abutting against the outer periphery of the ceramic member 11 are screwed to the fastening nut 17, and a plurality of distributing wings 20 are uniformly arranged on the outer periphery of the ceramic sleeve 18 at intervals, and each distributing wing 20 is tangent to the outer periphery of the ceramic sleeve 18. The high-speed rotating ceramic sleeve 18 uniformly hits and pulls out the lithium battery material falling from the upper feed hopper 13 to the periphery through the material distributing wing plate 20, so that the grinding and crushing efficiency of the lithium battery material is improved.

Further, as shown in fig. 5 and 6, the second grinding wheel 2 is prevented from being shifted in position during high-speed rotation. An annular ceramic seat 16 is arranged on one side of the grinding disc base 9 facing the second grinding disc 2, and the outer edge of the annular ceramic seat 16 is coated on the periphery of the second grinding disc 2.

In the above embodiment, as shown in fig. 6, the ceramic blade 12 includes a first plate 1201 and a second plate 1202, an included angle is formed between the first plate 1201 and the second plate 1202, and a rib plate 1203 perpendicular to the first plate 1201 is disposed between the first plate 1201 and the second plate 1202. An included angle between the first plate 1201 and the second plate 1202 is 165-175 deg, the ceramic blade 12 will rotate along with the grinding disc base 9 at high speed, and the rib plate 1203 on the ceramic blade 12 can shift the material to be dropped at the bottom of the grinding cavity in the above embodiment to the discharge cylinder 14, so as to increase the discharging efficiency of the colloid mill. The plane of the rib plate 1203 is not coincident with the central axis of the main shaft 6, and the rib plate 1203 is inclined at a certain angle.

Further, a stopper 21 is provided on the outer periphery of the top cover 3, a fastening handle 22 corresponding to the stopper 21 is provided on the outer periphery of the cylinder 4, the fastening handle 22 is rotatably connected to the cylinder 4, and a stopper plate 23 capable of abutting against the upper side of the stopper 21 is provided on the fastening handle 22. By rotating the fastening handle 22, the limiting plate 23 on the fastening handle 22 can be abutted against the upper side of the limiting block 21, so that the effect of fixing the position of the top cover 3 is achieved.

In this embodiment, the side walls of the top cover 3 and the cylinder 4 are of a double-layer structure, so that noise generated during operation of the colloid mill can be effectively reduced.

Working principle: the top cover 3 is turned over to the right above the cylinder 4, and the fastening handle 22 is twisted to enable the limiting plate 23 on the fastening handle 22 to be abutted against the limiting block 21 pressed on the top cover 3, so that the position between the top cover 3 and the cylinder 4 is relatively fixed. The upper top cover 3 and the cylinder body 4 are combined to form a barrel-shaped structure, a grinding cavity is formed between the top cover 3 and the cylinder body 4, and the first grinding disc 1 fixed on the top cover 3 and the second grinding disc 2 on the grinding disc base 9 are in a vertically opposite position relationship at the moment. Pouring lithium battery material into the opening end of the feed hopper 13, and the ceramic sleeve 18 rotating at a high speed, uniformly beating and scattering the lithium battery material falling from the feed hopper 13 above to the periphery through the material distributing wing plate 20, and rapidly moving towards the grinding area between the first grinding disc 1 and the second grinding disc 2 under the stirring of the ceramic piece 11 and the action of centrifugal force when the lithium battery material entering the grinding cavity is stirred to the discharge cylinder 14 by the material falling to the bottom of the grinding cavity. The grinding efficiency of lithium battery materials can be effectively increased by increasing the rotating speed of the main shaft 6, meanwhile, the ceramic piece 11 and the ceramic blade 12 have good wear resistance, the service life can be prolonged, magnetic foreign matters can not be generated when friction is damaged, and the safety of a lithium ion battery can be effectively ensured.

The above-described preferred embodiments according to the present utility model are intended to suggest that, from the above description, various changes and modifications can be made by the person skilled in the art without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims (6)

1. A colloid mill for lithium electric material is characterized in that: the grinding device comprises a first grinding disc (1) and a second grinding disc (2) which are oppositely arranged, wherein through holes are formed in the first grinding disc (1) and the second grinding disc (2), the first grinding disc (1) is arranged on a top cover (3), and the second grinding disc (2) is arranged on a cylinder body (4) hinged with the top cover (3);

when the top cover (3) is turned over to the opening end of the cylinder body (4), a grinding cavity is formed between the top cover (3) and the cylinder body (4) in a surrounding mode;

a cylinder core column (5) extending into the grinding cavity is arranged in the cylinder body (4), and the cylinder core column (5) is a hollow cylinder;

a main shaft (6) is arranged in the cylinder core column (5), the main shaft (6) is connected to a motor (8) through a sleeve member (7), a grinding disc base (9), a compression ring (10) and a ceramic member (11) are sequentially sleeved on the periphery of one end of the main shaft (6) extending into the grinding cavity, the second grinding disc (2) is clamped between the grinding disc base (9) and the compression ring (10), the ceramic member (11) is in threaded connection with the end part of the main shaft (6), and a plurality of ceramic paddles (12) are arranged on the lower side of the grinding disc base (9);

the grinding device is characterized in that a feed hopper (13) communicated with the through hole is arranged on the top cover (3), a discharge cylinder (14) communicated with the grinding cavity is arranged on the cylinder body (4), and the first grinding disc (1), the second grinding disc (2) and the main shaft (6) are coaxially arranged.

2. The colloid mill for lithium battery material according to claim 1, wherein: the grinding device is characterized in that a plurality of groups of staggered grinding grooves (15) are formed in one side, opposite to the first grinding disc (1) and the second grinding disc (2), of the first grinding disc (1), the distance between one side, opposite to the second grinding disc (2), is gradually reduced from the direction extending around the central axis, and one side, opposite to the first grinding disc (1) and the second grinding disc (2), is arc-shaped.

3. The colloid mill for lithium battery material according to claim 1, wherein: an annular ceramic seat (16) is arranged on one side of the grinding disc base (9) facing the second grinding disc (2), and the outer edge of the annular ceramic seat (16) is coated on the periphery of the second grinding disc (2).

4. The colloid mill for lithium battery material according to claim 1, wherein: the ceramic piece (11) comprises a fastening nut (17) in threaded connection with the end part of the main shaft (6), and a ceramic sleeve (18) sleeved on the fastening nut (17), wherein a plurality of screws (19) propped against the periphery of the ceramic piece (11) are screwed on the fastening nut (17), a plurality of distributing wing plates (20) are uniformly arranged on the periphery of the ceramic sleeve (18) at intervals, and each distributing wing plate (20) is tangent to the periphery of the ceramic sleeve (18).

5. The colloid mill for lithium battery material according to claim 1, wherein: the ceramic blade (12) comprises a first plate (1201) and a second plate (1202), an included angle is formed between the first plate (1201) and the second plate (1202), and a rib plate (1203) perpendicular to the first plate (1201) is arranged between the first plate (1201) and the second plate (1202).

6. The colloid mill for lithium battery material according to claim 1, wherein: the utility model discloses a top cap, including barrel, stopper (21) are provided with in the periphery of top cap (3), the periphery of barrel (4) be equipped with fastening handle (22) that stopper (21) correspond, fastening handle (22) rotate and connect on barrel (4), be provided with on fastening handle (22) can with limiting plate (23) that stopper (21) upside supported.