CN212998653U

CN212998653U - Coating slurry filtering device

Info

Publication number: CN212998653U
Application number: CN202021779900.8U
Authority: CN
Inventors: 曹笃笃
Original assignee: Henan Fusen New Energy Technology Co ltd
Current assignee: Henan Fusen New Energy Technology Co ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-04-20
Anticipated expiration: 2030-08-24

Abstract

The utility model provides a coating slurry filtering device, which belongs to the technical field of lithium battery production and comprises a barrel body, wherein an iron removing device for absorbing iron impurities and a plurality of filter screens for filtering particle impurities are arranged in the barrel body, and a vibrating device is arranged outside the barrel body; the filter screens are all of circular net structures and are arranged at intervals along the axial direction of the barrel body; the iron removing device is of a cylindrical structure and is arranged between the two topmost layers of filter screens; a plurality of cylindrical magnetic rods which are parallel to each other are arranged in the iron removing device. The utility model is provided with a plurality of layers of filter screens, which can more effectively filter the particle impurities in the slurry, the mesh number of the filter screens is increased accordingly, the particle impurities from large to small can be respectively filtered, and the blockage of the filter screens can be avoided; the utility model is provided with the iron removing device, so that fine iron impurities in the slurry can be effectively adsorbed, and the purity of the lithium battery slurry is improved; the utility model discloses set up vibrating device, can disperse thick liquids and make thick liquids evenly pass through the filter screen, can vibrate granule impurity again and prevent that it from blockking up the filter screen.

Description

Coating slurry filtering device

Technical Field

The utility model belongs to the technical field of lithium cell production, concretely relates to coating slurry filter equipment.

Background

In the production process of the lithium battery, special solvent, adhesive and powdery positive and negative active substances are required to be mixed and stirred to prepare positive and negative electrode slurry, and then the slurry is coated on the metal foil. During the preparation of the slurry, impurities may be mixed in, and the slurry may have gel particles if not uniformly mixed. Impurities or gel particles in the slurry can block the knife edge of the coating machine, so that the coated pole piece is exposed, if the pole piece is coated on the pole piece, granular bulges can be formed on the pole piece, and the impurities or gel particles can seriously influence the stability of the coating process and the consistency of the product quality. And iron impurities are easily mixed in the slurry in the preparation and conveying processes, and the iron impurities can cause overlarge self-discharge of the battery cell, so that the performance of the battery cell is influenced. Therefore, impurities and gel particles in the slurry need to be filtered, a single-layer filter screen is mostly used in the filtering of the slurry at present, if the mesh number of the filter screen is small, tiny particles cannot be filtered, and if the mesh number of the filter screen is large, large-particle impurities can block gaps of the filter screen to influence the conveying of the slurry in the coating process.

In view of these circumstances, some improvements have been proposed, for example, in the utility model with the publication number CN211273851U, which is published in 8/18/2020, a multi-stage filtration device for battery materials used in the production of lithium batteries is proposed, which is provided with a plurality of filter plates, and can realize multi-stage filtration of slurry, but the filter plates of the device have no clear mesh number, and if the same mesh number or the mesh number is not properly set, the particulate impurities in the slurry are mostly filtered by the preceding filter plate, and the preceding filter plate is easily blocked; the filter plates in the device are vertically arranged, slurry horizontally flows through each filter plate, the flow velocity is slow, and the filtering efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, to prior art not enough, provide a coating slurry filter equipment.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the coating slurry filtering device comprises a barrel body, wherein the barrel body is of a vertically arranged cylindrical barrel-shaped structure, the top of the barrel body is not provided with a cover, and the bottom of the barrel body is provided with a discharge hole; an iron removal device for adsorbing iron impurities and a plurality of filter screens for filtering particle impurities are arranged in the barrel body, and a vibration device is arranged outside the barrel body; the filter screens are all of circular net structures, the outer diameters of the filter screens are consistent with the inner diameter of the barrel body, the filter screens are arranged at intervals along the axial direction of the barrel body, and the axial direction of the filter screens is consistent with the axial direction of the barrel body; the iron removing device is of a cylindrical structure with two through ends, a plurality of cylindrical magnetic rods which are parallel to each other are arranged in the iron removing device, the outer diameter of the iron removing device is consistent with the inner diameter of the barrel body, the iron removing device is arranged between the two uppermost layers of filter screens, and the axial direction of the iron removing device is consistent with the axial direction of the barrel body; the vibration device is used for vibrating the barrel body.

Furthermore, the mesh number of the filter screen increases from top to bottom in turn.

Further, the discharge hole is flat.

Furthermore, the barrel body is made of stainless steel.

Furthermore, the filter screens are all made of stainless steel materials.

The utility model has the advantages as follows: the utility model is provided with a plurality of layers of filter screens, which can more effectively filter particle impurities in the coating slurry of the lithium battery and ensure that the particle impurities can not flow to the coating machine; the mesh number of the multi-layer filter screen is increased according to the utility model, the large-to-small particle impurities are respectively filtered, the larger particle impurities in the slurry are firstly filtered by the upper filter screen during the operation, and the small particle impurities in the slurry are filtered by the lower filter screen, thus effectively avoiding the blockage of the filter screen and ensuring the smooth production; the slurry of the utility model flows through the filter screen under the action of gravity, so that the particle impurities in the slurry can be prevented from passing through the filter screen after being deformed under the action of huge pressure; the utility model is provided with the iron removing device, so that fine iron impurities in the slurry can be effectively adsorbed, the purity of the lithium battery slurry is improved, and the iron impurities are prevented from influencing the performance of the lithium battery; the utility model discloses set up vibrating device, can disperse thick liquids and make thick liquids evenly pass through the filter screen, can avoid particle impurity to block the filter screen again for the velocity of flow when thick liquids filter.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1: the utility model discloses embodiment 1's cross-sectional structure picture.

FIG. 2: the utility model discloses the structure schematic diagram of deironing module.

FIG. 3: the utility model discloses embodiment 2's cross-sectional structure picture.

The device comprises a barrel body 1, a discharge hole 11, an iron removal device 2, a magnetic rod 21, a filter screen 3 and a vibration device 4.

Detailed Description

For a better understanding of the present invention, the following embodiments and the accompanying drawings are used to further clarify the content of the present invention, but the protection of the present invention is not limited to the following embodiments. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details.

Example 1:

as shown in figure 1, the utility model discloses a staving 1, staving 1 are the cylindrical tubbiness structure of perpendicular setting, adopt stainless steel to make, and the top does not have the lid, and the bottom is provided with discharge gate 11. The barrel body 1 is internally provided with a filter screen 3 and an iron removal device 2.

The filter screen 3 is used for filtering particle impurities in the lithium battery coating slurry; the filter screens 3 are all of circular net structures and are all made of stainless steel materials, and the outer diameters of the filter screens are consistent with the inner diameter of the barrel body 1; the filter screens 3 are arranged at intervals along the axial direction of the barrel body 1, and the axial direction is consistent with the axial direction of the barrel body 1; the mesh number of the filter screen 3 increases from top to bottom. In this embodiment, the barrel body 1 is provided with two layers of filter screens 3, the upper layer of filter screen 3 is 150 meshes, and the lower layer of filter screen 3 is 200 meshes. In the specific implementation process, the filter screens 3 with other meshes can be selected, but the meshes are ensured to be sequentially increased from top to bottom, so that the filter screens 3 from top to bottom can be ensured to respectively filter particle impurities from large to small, and the blockage of meshes can be avoided.

The iron removal device 2 is used for adsorbing iron impurities in the lithium battery coating slurry, the outer diameter of the iron removal device is consistent with the inner diameter of the barrel body 1, the iron removal device is arranged between the two layers of filter screens 3, and the axial direction of the iron removal device is consistent with the axial direction of the barrel body 1. As shown in fig. 2, the iron removing device 2 is a vertically through cylindrical structure, and a plurality of cylindrical magnetic rods 21 are arranged inside the iron removing device, wherein the cylindrical magnetic rods 21 are parallel to each other, and the magnetic rods 21 are all perpendicular to the axial direction of the iron removing device 2. Gaps are left between the magnetic rods 21, and the lithium battery coating slurry can flow through the gaps.

The outer side of the barrel body 1 is also provided with a vibrating device 4, and in the specific implementation process, the vibrating device 4 can be arranged on the side wall of the barrel body 1 or at the bottom of the barrel body 1; the vibration device 4 may be an eccentric vibrator, an electromagnetic vibrator, an ultrasonic vibrator, or the like. Vibrating device 4 is used for vibrating staving 1, drives filter screen 3 vibration during 1 vibration of staving, can disperse thick liquids and make thick liquids evenly pass through when filter screen 3 vibrates, can avoid particle impurity to block the mesh again for the velocity of flow when lithium cell coating thick liquids filter.

The utility model discloses can set up in the top of coating machine, at the during operation, lithium cell coating thick liquids flow in from the top, and great particle impurity in the thick liquids is filtered at first to upper filter screen 3 to make thick liquids disperse the back and flow through deironing device 2, iron impurity in the thick liquids is adsorbed to deironing device 2, filters the small particle impurity in the thick liquids by lower floor's filter screen 3 at last. The slurry after filtration is discharged from the discharge port 11 to the coating portion of the coater, and the coating process can be directly performed. The utility model discloses also can set up in other positions, the coating machine is carried to thick liquids accessible pipeline after the filtration. The slurry should be coated immediately after filtration to prevent the slurry from generating particles due to secondary agglomeration.

Example 2:

as shown in fig. 3, the main difference between this embodiment and embodiment 1 is: three layers of filter screens 3 are arranged in the barrel body 1, the iron removing device 2 is arranged between the two layers of filter screens 3 at the top, the discharge hole 11 at the bottom of the barrel body 1 is flat, and the horizontal direction of the outlet is vertical to the coating moving direction. The mesh number of the filter screen 3 of this embodiment from top to bottom is 150 meshes, 200 meshes and 400 meshes in proper order, and this embodiment adopts three-layer filter screen 3, can more effective filter granule impurity. In the specific implementation process, other mesh numbers can be selected according to actual conditions, but the mesh numbers are ensured to be increased from top to bottom.

The discharge port 11 of this embodiment is flat, the barrel 1 is disposed above the coater, and the slurry is directly flowed to the coating portion and then formed into a linear shape. The step of scraping to disperse the slurry may be omitted relative to using a circular outlet. In the specific implementation process, the length of the outlet of the discharge port 11 can be set according to the width of the coating part.

It should be noted that, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a coating slurry filter equipment, includes the staving, the staving is the cylindrical tubbiness structure of perpendicular setting, and the top is uncovered, and the bottom is provided with discharge gate, its characterized in that: an iron removal device for adsorbing iron impurities and a plurality of filter screens for filtering particle impurities are arranged in the barrel body, and a vibration device is arranged outside the barrel body; the filter screens are all of circular net structures, the outer diameters of the filter screens are consistent with the inner diameter of the barrel body, the filter screens are arranged at intervals along the axial direction of the barrel body, and the axial direction of the filter screens is consistent with the axial direction of the barrel body; the iron removing device is of a cylindrical structure with two through ends, a plurality of cylindrical magnetic rods which are parallel to each other are arranged in the iron removing device, the outer diameter of the iron removing device is consistent with the inner diameter of the barrel body, the iron removing device is arranged between the two uppermost layers of filter screens, and the axial direction of the iron removing device is consistent with the axial direction of the barrel body; the vibration device is used for vibrating the barrel body.

2. The coating slurry filtering device according to claim 1, characterized in that: the mesh number of the filter screen increases from top to bottom in turn.

3. The coating slurry filtering device according to claim 1, characterized in that: the discharge hole is flat.

4. The coating slurry filtering device according to claim 1, characterized in that: the barrel body is made of stainless steel.

5. The coating slurry filtering device according to claim 1, characterized in that: the filter screens are all made of stainless steel materials.