Dispersion machine for processing conductive slurry

Abstract

The utility model discloses a dispersion machine for processing conductive slurry. The dispersion machine comprises a stock bin, a stirring assembly, a diffusion assembly and a top sealing cover, a stirring assembly is connected to the lower portion of the stock bin shell and comprises a stirring assembly shell, a stirring motor is vertically and upwards arranged in the stirring assembly shell, an output shaft of the stirring motor penetrates through a bottom plate of the stock bin shell, and a stirrer is arranged at the tail end of the output shaft of the stirring motor. A diffusion assembly is arranged on the side face of the stock bin shell and comprises an air pump arranged on the outer side wall of the stock bin shell, the air pump is connected with a ventilation pipe vertically and downwards leading to the bottom of the stock bin shell, and the top of the stock bin shell is sealed by a top sealing cover. According to the device provided by the utility model, full stirring can be carried out, a stirring dead zone is reduced, and the stirring effect is improved; and the diffuser is arranged to generate turbulent flow in the slurry, so that scattering is facilitated, and the agglomeration effect of the powder is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of conductive paste processing equipment, and particularly relates to a dispersing machine for conductive paste processing. Background Art

[0002] The dispersion process of lithium battery conductive paste is a key step in the production process of lithium batteries, which directly affects the performance and quality of the batteries.

[0003] The main purpose of the dispersion process of lithium battery conductive paste is to uniformly disperse powder materials such as active substances, conductive agents, and binders into a solvent to form a stable and uniform paste. This process generally includes three stages: wetting, dispersion, and stabilization of the powder materials.

[0004] The uniformly dispersed paste is beneficial to form a good conductive network, reduce the internal resistance of the battery. The full contact between the active substance and the conductive agent can improve the capacity utilization rate of the battery, and the stable paste can reduce the shedding and agglomeration of the electrode material and extend the cycle life of the battery.

[0005] Using mechanical energy such as external shear force or impact force to break the adhesion between particles and make the powder particles fully dispersed in the medium is the most widely used dispersion method at present. However, mechanical stirring is prone to produce dead zones, affecting the mixing uniformity. And with the continuous progress of lithium-ion battery materials, the particle size of raw materials is getting smaller and smaller, which not only improves the performance of lithium-ion batteries but also very easily forms aggregates during dispersion processing, thus increasing the difficulty of the mixing and dispersion process. Content of the Utility Model

[0006] In order to solve the above technical problems, the utility model provides the following technical solution: a dispersing machine for conductive paste processing, including a material bin, a stirring assembly, a diffusion assembly, and a top cover.

[0007] The material bin includes a material bin housing, the outer shape of the material bin housing is an open cylinder, and a discharge pipe is provided on the side of the bottom of the material bin housing, and a discharge electromagnetic valve is provided on the discharge pipe.

[0008] The stirring assembly is connected below the material bin housing. The stirring assembly includes a stirring assembly housing, a stirring motor is vertically arranged upward in the stirring assembly housing, the output shaft of the stirring motor passes through the bottom plate of the material bin housing, and a stirrer is provided at the end of the output shaft of the stirring motor.

[0009] Further, the stirrer is located at the bottom of the material bin housing. The stirrer includes a horizontally arranged disc and stirring blades provided thereon.

[0010] Further, the outer shape of the stirring blade is a rectangular thin plate, several of the stirring blades are arranged around the edge of the disc, and the outer edge of the stirring blade is closely attached to the inner wall of the material bin housing.

[0011] The side of the silo housing is provided with the diffusion assembly, and the diffusion assembly includes an air pump disposed on the outer side wall of the silo housing. The air pump is connected with an air pipe that vertically extends downward to the bottom of the silo housing.

[0012] Furthermore, a diffuser is provided at the end of the air pipe. The diffuser has a hollow cylindrical shape, and multiple groups of protruding air guide pipes are arranged around the diffuser.

[0013] The top of the silo housing is covered by the top cover.

[0014] The top cover includes a cover housing, and a convex ring corresponding to the shell edge of the silo housing is provided on the inner wall of the cover housing.

[0015] Furthermore, a rubber sealing ring is provided below the convex ring, and the rubber sealing ring is located between the convex ring and the shell edge of the silo housing.

[0016] Furthermore, a feed pipe is vertically provided on the top of the cover housing. A feed electromagnetic valve is provided on the feed pipe, and the feed pipe is connected with a guide pipe that eccentrically extends into the silo housing.

[0017] A dispersing machine for conductive paste processing provided by the present utility model has the following advantages: The stirring blades arranged around the disc fully stir the paste to be mixed. The outer edge of the stirring blade closely adheres to the inner wall of the silo housing, reducing the stirring dead zone and improving the stirring effect; A diffuser is provided, and the airflow ejected from the air guide pipes of the diffuser can generate relatively fast turbulent flow in the paste, which helps to break up and reduce the agglomeration effect of the powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic external view of a dispersing machine for conductive paste processing of the present utility model;

[0020] Figure 2 It is a three-dimensional sectional view of a dispersing machine for conductive paste processing of the present utility model;

[0021] Figure 3 It is a front sectional view of a dispersing machine for conductive paste processing of the present utility model.

[0022] Description of the reference numerals in the figures: 1. Silo, 101. Silo housing, 102. Discharge pipe, 1021. Discharge solenoid valve, 2. Stirring assembly, 201. Stirring assembly housing, 202. Stirring motor, 203. Stirrer, 2031. Disc, 2032. Stirring blade, 3. Diffusion assembly, 301. Air pump, 302. Vent pipe, 303. Diffuser, 3031. Guide pipe, 4. Top cover, 401. Cover housing, 4011. Convex ring, 4012. Rubber sealing ring, 402. Feed pipe, 403. Feed solenoid valve. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0025] As Figures 1-3 shown, an embodiment provided by the present utility model is a dispersing machine for conductive paste processing, including a silo 1, a stirring assembly 2, a diffusion assembly 3 and a top cover 4.

[0026] The silo 1 includes a silo housing 101. The outer shape of the silo housing 101 is an open cylinder, which is used to place the solvent for dispersing the powder. A discharge pipe 102 is provided on the side of the bottom of the silo housing 101, and a discharge solenoid valve 1021 is provided on the discharge pipe 102. The discharge solenoid valve 1021 is used to control the discharge.

[0027] The silo housing 101 is connected to a stirring assembly 2 below. The stirring assembly 2 includes a stirring assembly housing 201. A stirring motor 202 is vertically arranged upward in the stirring assembly housing 201. The output shaft of the stirring motor 202 passes through the bottom plate of the silo housing 101, and a stirrer 203 is provided at the end of the output shaft of the stirring motor 202.

[0028] Preferably, the stirrer 203 is located at the bottom of the bin housing 101. The stirrer 203 includes a horizontally arranged disc 2031 and stirring blades 2032 provided thereon.

[0029] Preferably, the outer shape of the stirring blade 2032 is a rectangular thin plate. A plurality of stirring blades 2032 are arranged around the edge of the disc 2031, and the outer edge of the stirring blade 2032 is closely attached to the inner wall of the bin housing 101. The stirring blades 2032 arranged in this way can generate mechanical stirring force on the conductive paste at various depths in the bin housing 101. The outer edge of the stirring blade 2032 being closely attached to the inner wall of the bin housing 101 can prevent the generation of stirring dead zones and avoid weak fluidity of the paste locally, resulting in uneven dispersion.

[0030] A diffusion assembly 3 is provided on the side of the bin housing 101. The diffusion assembly 3 includes an air pump 301 provided on the outer side wall of the bin housing 101. The air pump 301 is connected with an air pipe 302 that vertically extends downward to the bottom of the bin housing 101. The air pump 301 blows air into the air pipe 302, which can ventilate the conductive paste.

[0031] Preferably, a diffuser 303 is provided at the end of the air pipe 302. The diffuser 303 is in the shape of a hollow cylinder, and a plurality of groups of protruding air guide pipes 3031 are arranged around the diffuser 303. High-speed air flows out from the air guide pipes 3031, which can generate a relatively fast turbulent flow in the center of the paste, helping to break up and reduce the agglomeration effect of the powder.

[0032] The top of the bin housing 101 is covered by a top cover 4.

[0033] The top cover 4 includes a cover housing 401, and a convex ring 4011 corresponding to the shell edge of the bin housing 101 is provided on the inner wall of the cover housing 401.

[0034] Preferably, a rubber sealing ring 4012 is provided below the convex ring 4011. The rubber sealing ring 4012 is located between the convex ring 4011 and the shell edge of the bin housing 101. The rubber sealing ring 4012 is closely attached to the shell edge of the bin housing 101 by the gravity of the cover housing 401, achieving a good sealing effect.

[0035] Preferably, a feed pipe 402 is vertically provided on the top of the cover housing 401. A feed electromagnetic valve 403 is provided on the feed pipe 402. The feed pipe 402 is connected with a guide pipe 404 that eccentrically extends into the bin housing 101. After the feed electromagnetic valve 403 is opened, the powder to be dispersed can be fed into the bin housing 101. The arrangement of the guide pipe 404 can prevent the powder from being lifted and accurately fall into the solvent.

[0036] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or equivalently replace some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dispersing machine for processing conductive paste, characterized in that: It includes a silo (1), a stirring assembly (2), a diffusion assembly (3) and a top cover (4); The silo (1) includes a silo housing (101). The outer shape of the silo housing (101) is an open cylinder. A discharge pipe (102) is provided on the side of the bottom of the silo housing (101), and a discharge solenoid valve (1021) is provided on the discharge pipe (102); The stirring assembly (2) is connected below the silo housing (101). The stirring assembly (2) includes a stirring assembly housing (201). A stirring motor (202) is vertically arranged upward in the stirring assembly housing (201). The output shaft of the stirring motor (202) passes through the bottom plate of the silo housing (101), and a stirrer (203) is provided at the end of the output shaft of the stirring motor (202); The diffusion assembly (3) is provided on the side of the silo housing (101). The diffusion assembly (3) includes an air pump (301) provided on the outer wall of the silo housing (101). The air pump (301) is connected with a ventilation pipe (302) that vertically leads downward to the bottom of the silo housing (101); The top of the silo housing (101) is covered by the top cover (4); The top cover (4) includes a cover housing (401). A convex ring (4011) corresponding to the shell edge of the silo housing (101) is provided on the inner wall of the cover housing (401).

2. The dispersing machine for conductive paste processing according to claim 1, characterized in that: The stirrer (203) is located at the bottom of the silo housing (101). The stirrer (203) includes a horizontally arranged disc (2031) and a plurality of stirring blades (2032) provided thereon.

3. A dispersing machine for processing conductive paste according to claim 2, characterized in that: The outer shape of the stirring blade (2032) is a rectangular thin plate. A plurality of the stirring blades (2032) are vertically arranged around the edge of the disc (2031), and the outer edge of the stirring blade (2032) closely adheres to the inner wall of the silo housing (101).

4. A dispersing machine for processing conductive paste according to claim 1, characterized in that: A diffuser (303) is provided at the end of the ventilation pipe (302). The diffuser (303) is in the shape of a hollow cylinder, and multiple groups of protruding air guide pipes (3031) are arranged around the diffuser (303).

5. A dispersing machine for processing conductive paste according to claim 1, characterized in that: A rubber sealing ring (4012) is provided below the convex ring (4011). The rubber sealing ring (4012) is located between the convex ring (4011) and the shell edge of the silo housing (101).

6. A dispersing machine for processing conductive paste according to claim 1, characterized in that: A feed pipe (402) is vertically provided on the top of the cover housing (401). A feed solenoid valve (403) is provided on the feed pipe (402). The feed pipe (402) is connected with a guide pipe (404) that eccentrically extends into the silo housing (101).

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