CN217221745U

CN217221745U - Enhanced grinding device for lithium manganese phosphate material

Info

Publication number: CN217221745U
Application number: CN202220177096.9U
Authority: CN
Inventors: 苑永; 李积刚
Original assignee: Tianjin Skoland Technology Co ltd
Current assignee: Tianjin Skoland Technology Co ltd
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2022-08-19
Anticipated expiration: 2032-01-20

Abstract

The utility model discloses a strengthening grinding device for lithium manganese phosphate materials, which consists of a grinding cylinder shell, a grinding barrel, a rotating shaft, a screen separator and a driving motor, wherein the grinding barrel is positioned in the grinding cylinder shell, so that a grinding area positioned outside the grinding barrel and a grinding area positioned in the grinding barrel are formed in the grinding cylinder shell; one end of the grinding barrel is connected with the grinding cylinder shell through a connecting shaft, and the other end of the grinding barrel is provided with a through hole for the rotating shaft to pass through; the rotating shaft is a hollow shaft, one end of the rotating shaft penetrates through the through hole of the grinding barrel to be connected with the grinding barrel and penetrates through the outer shell of the grinding cylinder to be rotatably connected with the rotary joint, the other end of the rotating shaft is provided with a screen separator, and the rotating shaft is driven by a driving motor to drive the grinding barrel to rotate; the top of the grinding cylinder shell is provided with a primary grinding feed inlet on one side close to the connecting shaft, and a secondary grinding feed inlet is arranged on the side wall of the grinding barrel end far away from the primary grinding feed inlet side. The utility model provides high grinding efficiency and grinding quality can grind big batch material.

Description

Enhanced grinding device for lithium manganese phosphate material

Technical Field

The utility model belongs to the technical field of the lithium cell, especially, relate to a strenghthened grinding device of manganese lithium phosphate material.

Background

At present, the domestic electric automobile industry rises unprecedentedly, and the consumption of electronic products is continuously enlarged, so that the demand on lithium ion batteries is increasingly increased. Lithium manganese phosphate has an olivine-like crystal structure, resulting in its physicochemical stability as an electrode material. And the lithium manganese phosphate has a specific capacity of 171mAh/g and a discharge platform (vs Li/Li +) of about 4.1V, so that the lithium manganese phosphate becomes an ideal material of a new-generation lithium ion power battery. At present, lithium manganese phosphate is mainly used for research and development of a new generation of lithium ion battery anode material at the laboratory stage, and different from lithium iron phosphate, large-batch commercial application of lithium manganese phosphate cannot be achieved at home due to the difficulties of large-batch synthesis of lithium manganese phosphate, the difficulty of improvement of conductivity and the like. The common preparation methods of lithium manganese phosphate mainly comprise a solid phase method and a liquid phase method. The solid phase method adopts solid lithium salt, manganese salt and phosphate to be ball-milled, mixed and sintered at high temperature in the atmosphere of protective gas. The liquid phase method is divided into a polyol method, a sol-gel method and a hydrothermal method, and the liquid phase method for synthesizing the lithium manganese phosphate also has the problem of incomplete crystallization and often needs further annealing and firing. In the preparation process of lithium manganese phosphate, the grinding quality directly determines the physical and electrochemical properties of the battery. Therefore, the grinding quality of the material is improved, so that the comprehensive performance of the battery can be improved.

The existing method for grinding lithium manganese phosphate mainly comprises the following steps: grinding is carried out by adopting a grinder. The main design idea is as follows: adding zirconia balls into the grinding cylinder, and grinding the lithium manganese phosphate material by using the zirconia balls. The main drawbacks of this technique are:

1. the grinding device is too simple, so that the grinding of the material is insufficient, and the grinding quality is not high.

2. If the grinding quality of the material needs to be improved, repeated grinding is needed, the production efficiency is low, and the production cost is high.

Disclosure of Invention

The utility model provides a solve the problem that prior art exists, provide a grinding device is reinforceed to manganese lithium phosphate material, should reinforce grinding device has simple structure, easy and simple to handle, production efficiency is high, low cost, can grind in batches, the practicality is strong, and can effectively promote manganese lithium phosphate material grinding quality, comparatively simple promotion the grinding quality of manganese lithium phosphate on the basis that does not increase manufacturing cost, and the effect is obvious.

The utility model is realized in such a way, the reinforced grinding device of the lithium manganese phosphate material comprises a grinding cylinder shell, a grinding barrel, a rotating shaft, a screen separator and a driving motor, wherein the grinding barrel is positioned in the grinding cylinder shell, so that an outer grinding area positioned outside the grinding barrel and an inner grinding area positioned in the grinding barrel are formed in the grinding cylinder shell; one end of the grinding barrel is connected with the grinding cylinder shell through a connecting shaft, and the other end of the grinding barrel is provided with a through hole for the rotating shaft to pass through; the grinding device comprises a grinding cylinder shell, a rotary joint, a rotary shaft, a screen separator, a driving motor, a grinding barrel, a grinding cylinder, a screen separator and a motor, wherein the rotary shaft is a hollow shaft, one end of the rotary shaft penetrates through a through hole of the grinding barrel to be connected with the grinding barrel and penetrates through the outside of the grinding cylinder shell to be rotatably connected with the rotary joint, the other end of the rotary shaft is provided with the screen separator, and the rotary shaft is driven to rotate by the driving motor and drives the grinding barrel to rotate; the grinding cylinder shell top is provided with the primary grinding feed inlet on one side of being close to the connecting axle, is keeping away from the primary grinding feed inlet side the grinding barrel end lateral wall is provided with the secondary grinding feed inlet.

In the technical scheme, preferably, a plurality of stirring blocks are distributed on the inner wall and the outer wall of the grinding barrel along the axial direction, so that materials are fully ground, and the grinding quality is improved.

In the above technical solution, preferably, the rotating shaft extends into the vicinity of the side wall of the grinding barrel on the side far away from the secondary grinding feed inlet at the end connected with the screen separator.

In the above technical solution, preferably, a protruding block is disposed at a connection position of the rotating shaft and the grinding barrel, so that the rotating shaft and the grinding barrel are limited mutually.

In the above technical solution, preferably, the rotating shaft is rotatably connected with the grinding cylinder housing through a bearing.

In the above technical solution, preferably, the grinding barrel and the rotating shaft are both made of silicon carbide or zirconia.

In the above technical solution, preferably, the connecting shaft is rotatably connected with the grinding barrel through a bearing, and the connecting shaft is fixedly connected with the grinding cylinder housing.

The utility model has the advantages and positive effects that:

compared with the prior art, the reinforced grinding device for the lithium manganese phosphate material has the advantages that due to the addition of the grinding barrel, the grinding chamber is divided into the outer grinding area and the inner grinding area, which is equivalent to the step grinding of the material, the material is firstly ground outside the grinding barrel and then ground inside the grinding barrel, the grinding path and the grinding time of the material are simply and effectively increased, and the material is quickly ground for multiple times, so that the grinding efficiency and the grinding quality are improved, and the grinding is more sufficient; the stirring blocks distributed on the inner wall and the outer wall of the grinding barrel further ensure the full grinding of the materials; the axis of rotation is hollow structure, and the thick liquids that grind can flow out through the filter, makes things convenient for the outflow and the collection of grinding material. The utility model has the advantages of simple structure, easy and simple to handle, efficient, grinding quality is good, with low costs, the practicality is strong, and the effect is obvious, can be to advantages such as big batch material grinding, application prospect is fine in actual production.

Drawings

Fig. 1 is a schematic structural diagram of an intensified grinding device for lithium manganese phosphate materials according to an embodiment of the present invention.

In the figure: 1. a grinding cylinder housing; 2. grinding the feed inlet for the first time; 3. stirring blocks; 4. a connecting shaft; 5. a screen separator; 6. a grinding barrel; 7. a bearing; 8. a rotating shaft; 9. a drive motor; 10. a rotary joint; 11. a transmission gear; 12. and (5) grinding the feed inlet for the second time.

Detailed Description

For further understanding of the contents, features and effects of the present invention, the following embodiments will be illustrated in detail with reference to the accompanying drawings:

referring to fig. 1, an embodiment of the present invention provides a strengthened grinding device for lithium manganese phosphate materials, which comprises a grinding cylinder housing 1, a grinding barrel 6, a rotating shaft 8, a screen separator 5, and a driving motor 9.

The grinding barrel 6 is positioned in the grinding cylinder shell 1, so that an outer grinding area positioned outside the grinding barrel 6 and an inner grinding area positioned in the grinding barrel 6 are formed in the grinding cylinder shell 1, grading grinding is formed, the rapid grinding of materials is guaranteed for multiple times, and the grinding efficiency is improved. The grinding barrel is characterized in that one end of the grinding barrel 6 is connected with the grinding cylinder shell 1 through a connecting shaft 4, specifically, the connecting shaft 4 is rotatably connected with the grinding barrel 6 through a bearing 7, the connecting shaft 4 is fixedly connected with the grinding cylinder shell 1, and the other end of the grinding barrel 6 is provided with a through hole for enabling the rotating shaft 8 to penetrate through.

The grinding device comprises a grinding cylinder shell 1, a rotating shaft 8, a screen separator 5, a driving motor 9 and a grinding barrel 6, wherein the rotating shaft 8 is a hollow shaft, one end of the rotating shaft 8 penetrates through a through hole of the grinding barrel 6 to be connected with the grinding barrel 6 and penetrates through the outside of the grinding cylinder shell 1 to be rotatably connected with a rotary joint 10, and the other end of the rotating shaft 8 is provided with the screen separator 5 and is driven to rotate by the driving motor 9 to drive the grinding barrel 6 to rotate; specifically, the axis of rotation 8 is provided with a lug with grinding barrel 6 junction for it is spacing each other between axis of rotation 8 and the grinding barrel 6, and axis of rotation 8 rotates and to drive grinding barrel 6 and rotate, axis of rotation 8 passes through bearing 7 and is connected with grinding cylinder shell 1 rotation, driving motor 9 passes through drive gear 11 and is connected with axis of rotation 8, drives axis of rotation 8 and rotates.

The top of the grinding cylinder shell 1 is provided with a primary grinding feed port 2 on one side close to the connecting shaft 4, and a secondary grinding feed port 12 is arranged on the side wall of the grinding barrel 6 far away from the primary grinding feed port 2, so that the flow path and the grinding time of materials are increased, and the grinding is more sufficient.

Along axial direction it has a plurality of stirring pieces 3 to distribute on the inside and outside wall of grinding vessel 6, guarantees that the material carries out abundant grinding, promotes and grinds the quality.

The shaft 8 extends at the end of the connecting screen separator 5 into the vicinity of the side wall of the grinding drum 6 remote from the secondary grinding feed opening 12, so that the material flow path is maximized as far as possible.

The grinding barrel 6 and the rotating shaft 8 are both made of silicon carbide or zirconia materials, and abrasion is avoided.

The utility model discloses a concrete working process as follows:

in the grinding barrel 6, zirconia ball is added respectively to the outer grinding district, lithium manganese phosphate material gets into by once grinding feed inlet 2, driving motor 9 drive axis of rotation 8 rotates and then drives grinding barrel 6 and rotate, the material is ground in the outer grinding district outside grinding barrel 6 earlier, back through the secondary grinding feed inlet 12 on the grinding barrel 6 get into in the grinding barrel 6, grind once more in the interior grinding district of grinding barrel 6, the arrow direction flow direction represents the flow path of material, grinding barrel 6 has increased the flow path of material, thereby the grinding time who has increased the material guarantees to reach the effect of intensive grinding. Finally, the grinded lithium manganese phosphate material is collected from the hollow rotating shaft 8 through the screen separator 5 and the rotary joint 10.

The utility model discloses can promote the grinding quality and the grinding efficiency of material well, have simple structure, easy and simple to handle, with low costs, the effect is obvious, and the practicality is strong, can grind advantages such as in batches greatly.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.

Claims

1. The reinforced grinding device for the lithium manganese phosphate material is characterized by comprising a grinding cylinder shell, a grinding barrel, a rotating shaft, a screen separator and a driving motor, wherein the grinding barrel is positioned in the grinding cylinder shell, so that an outer grinding area positioned outside the grinding barrel and an inner grinding area positioned in the grinding barrel are formed in the grinding cylinder shell; one end of the grinding barrel is connected with the grinding cylinder shell through a connecting shaft, and the other end of the grinding barrel is provided with a through hole for the rotating shaft to pass through; the grinding device comprises a grinding cylinder shell, a rotary joint, a rotary shaft, a screen separator, a driving motor, a grinding barrel, a grinding cylinder, a screen separator and a motor, wherein the rotary shaft is a hollow shaft, one end of the rotary shaft penetrates through a through hole of the grinding barrel to be connected with the grinding barrel and penetrates through the outside of the grinding cylinder shell to be rotatably connected with the rotary joint, the other end of the rotary shaft is provided with the screen separator, and the rotary shaft is driven to rotate by the driving motor and drives the grinding barrel to rotate; the grinding cylinder shell top is provided with the primary grinding feed inlet on one side of being close to the connecting axle, is keeping away from the primary grinding feed inlet side the grinding barrel end lateral wall is provided with the secondary grinding feed inlet.

2. The apparatus for intensively grinding lithium manganese phosphate material as claimed in claim 1, wherein a plurality of stirring blocks are distributed on the inner and outer walls of the grinding barrel in the axial direction.

3. The apparatus for intensive milling of lithium manganese phosphate material according to claim 1, wherein the rotating shaft is extended into the vicinity of the side wall of the milling barrel on the side away from the secondary milling feed port at the end connected to the screen separator.

4. The apparatus for enhancing the grinding efficiency of lithium manganese phosphate material as claimed in claim 1, wherein the rotating shaft is provided with a protrusion at the connection with the grinding barrel, so that the rotating shaft and the grinding barrel are mutually limited.

5. The apparatus for enhanced milling of lithium manganese phosphate material according to claim 1, wherein said rotating shaft is rotatably connected to the mill cylinder housing by a bearing.

6. The apparatus as claimed in claim 1, wherein the grinding barrel and the rotating shaft are made of silicon carbide or zirconia.

7. The reinforced grinding device for the lithium manganese phosphate material as claimed in claim 1, wherein the connecting shaft is rotatably connected with the grinding barrel through a bearing, and the connecting shaft is fixedly connected with the grinding cylinder shell.