CN219897902U

CN219897902U - Mixed cladding device

Info

Publication number: CN219897902U
Application number: CN202321349416.5U
Authority: CN
Inventors: 易宇; 张磊; 杜浩杰; 李骕
Original assignee: Hunan Naneng Times Technology Development Co ltd
Current assignee: Hunan Naneng Times Technology Development Co ltd
Priority date: 2023-05-30
Filing date: 2023-05-30
Publication date: 2023-10-27
Anticipated expiration: 2033-05-30

Abstract

The utility model discloses a mixing coating device, which comprises a mixing coating tank, wherein a stirring paddle for driving materials in the mixing coating tank to move is arranged in the mixing coating tank, the stirring paddle comprises a stirring shaft and stirring blades, and the stirring blades comprise an upper layer blade, a middle layer blade and a lower layer blade which are arranged on the stirring shaft along different heights; one end of the upper layer blade, which is close to the stirring shaft, is in a flat plate shape, and a connecting line between the upper layer blade and the stirring shaft is kept horizontal; the middle layer blades are in a flat plate shape and are horizontally arranged; the lower layer blade is in a flat plate shape, the connecting line between the lower layer blade and the stirring shaft is an inclined straight line, and an included angle alpha between the inclined straight line and the rotation direction of the stirring shaft is an obtuse angle. The mixing and coating device disclosed by the utility model has the advantages that through the optimized arrangement of the stirring blades, the material mixing is more uniform, the material flowing direction can be conveniently controlled, the final material mixing uniformity is good, the uniformity of the coating process is better facilitated, and the coating effect is better.

Description

Mixed cladding device

Technical Field

The utility model belongs to the field of battery preparation, and particularly relates to a modification device of a carbon-based negative electrode material.

Background

In many industries and fields such as energy storage battery materials, nano materials, fine chemical engineering and the like, the surface of the materials is required to be coated to improve the performance of the materials. Along with the exhaustion of traditional energy sources and environmental pollution, the development of energy storage battery materials is rapid, wherein the carbon-based negative electrode material has great development prospect, but has the problems of low first-week coulomb efficiency, poor cycle performance and the like. The specific surface area of the material can be reduced by coating, the generation of a solid electrolyte membrane is reduced, and the first-week coulomb efficiency of the material is improved.

Two or more materials need to be fully mixed in the coating process so as to promote the reaction rate and the coating effect, and therefore, the mixing degree of the materials has an important influence on the performance of the coating material. Most of the existing cladding machines enable internal materials to move through stirring paddles and spoilers, so that the materials collide and mix with each other, a good mixing effect is achieved, however, stirring dead zones can occur on the spoilers in the mixing process, the mixing effect is affected, cladding is uneven, dynamics of active ions are reduced due to the fact that the cladding is too thick, excessive solid electrolyte interface films are easy to form due to the fact that the cladding is too thin, and initial coulomb efficiency of the materials is low.

Therefore, the mixing coating device with good stirring and mixing effects is provided to improve the coating modification effect, and has great significance for improving the electrochemical performance of the carbon-based anode material.

Disclosure of Invention

The utility model aims to overcome the defects and the shortcomings in the background art, and provides the mixing and coating device with good stirring and mixing effects so as to achieve good coating effects. In order to solve the technical problems, the technical scheme provided by the utility model is as follows:

the mixing coating device comprises a mixing coating groove (sealing groove body), wherein stirring paddles for driving materials in the mixing coating groove to move are arranged in the mixing coating groove, each stirring paddle comprises a stirring shaft and stirring blades, and each stirring blade comprises an upper layer blade, a middle layer blade and a lower layer blade which are arranged on the stirring shaft along different heights;

one end of the upper layer blade, which is close to the stirring shaft, is in a flat plate shape, and a connecting line between the upper layer blade and the stirring shaft is kept horizontal;

the middle layer blades are in a flat plate shape and are horizontally arranged;

the lower layer blade is in a flat plate shape, the connecting line between the lower layer blade and the stirring shaft is an inclined straight line, and an included angle alpha between the inclined straight line and the rotation direction of the stirring shaft is an obtuse angle.

In the above mixing and coating device, preferably, the upper layer blade is horizontally arranged near one end of the stirring shaft, the upper layer blade is inclined away from the other end of the stirring shaft so as to drive the material contacted with the upper layer blade to move upwards, and the specific inclined mode can be the same as that of the lower layer blade, and can be integrally inclined slightly upwards.

In the above mixing and coating device, preferably, a material flow path control board is further disposed in the mixing and coating tank, the material flow path control board is a spherical cap cover plate disposed at the upper middle part of the inner cavity of the mixing and coating tank and above the stirring blade, and the inner cavity of the spherical cap cover plate faces the bottom of the mixing and coating tank.

In the above mixing and coating device, preferably, the edge of the spherical crown cover plate is tightly connected with the wall of the inner cavity of the mixing and coating groove, and the stirring shaft penetrates through the topmost end of the spherical crown cover plate.

According to the utility model, through the arrangement of the stirring blades, the materials can be more uniformly mixed, and the flow direction of the materials can be conveniently controlled. Specifically, the upper layer paddles are horizontally arranged at one end close to the stirring shaft and used for fully mixing materials, and the other end far away from the stirring shaft adopts the same arrangement mode as the lower layer paddles, so that the materials at the edge of the tank can continuously rise along the tank wall; the middle layer blade is used for fluidization and full mixing of materials; the connecting line of the lower layer blade and the stirring shaft is an inclined straight line, and an included angle alpha between the inclined straight line and the rotation direction of the stirring shaft is an obtuse angle, so that the material rises in the high-speed stirring process and is used for integrally rising. The specific number of upper layer paddle, middle level paddle and lower floor paddle all can be unlimited, and upper strata paddle is 2, and the middle level paddle has the multilayer, and every layer sets up 2, is the horizontal straight shape of arranging, and lower floor paddle is 2, the slope setting. The side edges of the upper layer blade, the middle layer blade and the lower layer blade avoid acute angles so as to prevent the morphology of particles from being damaged. Then, by matching with the action of the spherical crown cover plate and gravity, the materials can move downwards along the middle part of the mixing coating groove, so that vortex-like movement (the bottom materials move upwards along the groove wall and the materials at the center of the top move downwards) is formed when the materials are mixed at high speed, dead zones are reduced as much as possible, the flowability of the materials is strong, the mixing effect is good, the mixing uniformity is higher than 90%, and the motor can be protected.

In the above mixing and coating device, preferably, an ultrasonic device for providing ultrasonic waves to the material in the mixing and coating tank is disposed on the mixing and coating tank. Through setting up ultrasonic device and providing the ultrasonic wave, when ultrasonic wave propagates in the material, because ultrasonic wave and the interact of material, make the material take place physical and chemical change, provide high frequency vibration for the material, improve the dispersibility of material, reach good mixed effect, make its cladding even. The utility model provides ultra-high energy through the ultrasonic device, accelerates the high-frequency vibration of materials, strengthens the mixing and gas-solid contact process, inhibits the particle agglomeration in the mixing and coating process, strengthens the mixing effect, ensures that the mixing uniformity is higher than 97 percent, and realizes the coating uniformity.

In the above-mentioned hybrid coating device, preferably, the hybrid coating groove is a tapered groove with a large upper part and a small lower part. The conical groove is beneficial to controlling the flow direction of the material, and is more beneficial to the upward movement of the material along the groove.

In the above mixing and cladding device, preferably, a heating assembly, a heat preservation assembly and a cooling assembly are arranged on the outer wall of the mixing and cladding tank. The temperature of the materials can be controlled through the heating component and the cooling component; the heat loss in the mixing coating tank can be reduced by arranging the heat preservation component. The specific types of the heating component, the heat preservation component and the cooling component are not limited, such as an electric heating furnace, a heat preservation cover and a cooling water component.

In the above mixing and coating device, preferably, a feeding pipe is arranged above the mixing and coating tank, a through hole for the feeding pipe to pass through is formed in the spherical cap cover plate, a discharging pipe is arranged at the bottom of the mixing and coating tank, and a sealing flange is arranged on the feeding pipe and the discharging pipe. The material inlet and outlet can be controlled through the feeding pipe and the discharging pipe, and the sealing flange is used for sealing the feeding pipe and the discharging pipe.

In the above mixing and cladding device, preferably, an air inlet pipe, an air outlet pipe, a safety valve port and a pressure gauge port are arranged above the mixing and cladding groove. The air inlet pipe and the air outlet pipe can be used for conveniently controlling the coating atmosphere of the mixed coating groove, and the pressure gauge can be connected with the pressure gauge through the pressure gauge port and used for monitoring the pressure in the mixed coating groove. The pressure in the mixing coating groove can be controlled in a proper range through the safety valve port and the pressure gauge port.

In the above-mentioned hybrid coating device, preferably, the stirring shaft is connected with a stirring motor. The stirring motor is not limited in type and model, and can be manufactured by adopting the conventional product.

In the utility model, the material mixing effect determines the coating uniformity, and the coating non-uniformity has a great influence on the electrochemical performance of the battery. Generally, "mixing uniformity" is used as an evaluation index of the mixing effect, and the following formula is specific:

CV＝s/x×100％；

M＝1-CV；

wherein CV is the variation coefficient (%) of the absorbance of the tracer of the mixture, M is the mixing uniformity (%) of the mixture, and s is the standard deviation of the absorbance of the tracer of the mixture; x is the average value of absorbance of the tracer of the mixed material; the detection method of the tracer is as follows: the tracer is carmine, the dosage is 1/10000 of the mass of the mixed material, 5g of sample (comprising carmine and the mixed material) is quantitatively weighed, water is added, heating is carried out to dissolve the carmine, the volume is fixed to 50mL, and the absorbance of the sample is measured at 508nm by using an ultraviolet-visible spectrophotometer. In the utility model, the smaller the variation coefficient is, the better the mixing uniformity of the mixed materials is, and the more uniform coating in the coating process is shown. According to the utility model, through the optimization of the mixing and coating device, the stirring paddles and the spherical crown cover plate are designed, the mixed material forms reflux in the cavity, and the mixed material (such as biomass hard carbon and pretreated asphalt) is pretreated under the action of ultrasound to vibrate at high frequency, so that the mixed material is fully mixed, the variation coefficient of the mixed material is lower than 3%, the mixing uniformity M is higher than 97%, the mixing uniformity of the material is good, the uniformity of the coating process is facilitated, and the coating effect is better.

The working process of the hybrid cladding device of the utility model can be as follows: the mixing coating tank is fixed through the fixed cross beam, materials are added into the feeding pipe, the sealing flange is opened to enable the materials to enter the mixing coating tank, the temperature and atmosphere are controlled, the stirring motor drives the stirring blade to rotate through the stirring shaft to provide upward thrust for the materials, the materials move downwards along the middle of the mixing coating tank under the action of the spherical cap cover plate to form vortex-shaped flow, the materials are fully stirred, and after the reaction is finished, the materials are discharged from the discharging pipe. Meanwhile, by matching with the ultrasonic device, the full mixing of materials can be realized, and the mixing uniformity M of the mixed materials is higher than 97%.

Compared with the prior art, the utility model has the advantages that:

the mixing and coating device disclosed by the utility model has the advantages that through the optimized arrangement of the stirring blades, the material mixing is more uniform, the material flowing direction can be conveniently controlled, the final material mixing uniformity is good, the uniformity of the coating process is better facilitated, and the coating effect is better.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a hybrid cladding apparatus in examples 1-2.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a schematic structural view of the stirring paddle in example 1.

Legend description:

1. a mixing coating tank; 2. stirring the leaves; 21. an upper layer blade; 22. middle layer blade; 23. lower layer paddles; 3. a feed pipe; 4. a sealing flange; 5. a stirring motor; 6. a stirring shaft; 7. an exhaust pipe; 8. a thermal insulation assembly; 9. a spherical cap cover plate; 10. fixing the cross beam; 11. a heating assembly; 12. a cooling assembly; 14. an ultrasonic device; 15. a discharge pipe; 17. an air inlet pipe; 18. a standby valve port; 19. a safety valve port; 20. a safety valve port.

Detailed Description

The present utility model will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown, for the purpose of illustrating the utility model, but the scope of the utility model is not limited to the specific embodiments shown.

Unless defined otherwise, all technical and scientific terms used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the scope of the present utility model.

Unless otherwise specifically indicated, the various raw materials, reagents, instruments, equipment and the like used in the present utility model are commercially available or may be prepared by existing methods.

Example 1:

as shown in fig. 1 and fig. 2, the hybrid cladding device of the embodiment includes a hybrid cladding tank 1, a stirring paddle for driving materials in the hybrid cladding tank 1 to move is arranged in the hybrid cladding tank 1, the stirring paddle includes a stirring shaft 6 and a stirring blade 2, the stirring shaft 6 is connected with a stirring motor 5, the stirring blade 2 includes an upper layer blade 21, a middle layer blade 22 and a lower layer blade 23 which are arranged on the stirring shaft 6 along different heights, specifically, the upper layer blade 21 is integrally in a flat plate shape, and a connecting line with the stirring shaft 6 is kept horizontal, and is integrally horizontally arranged; the middle layer blade 22 is in a flat plate shape and is horizontally arranged; the lower paddle 23 has a flat plate shape, and the connecting line with the stirring shaft 6 is an inclined straight line, and an included angle α between the inclined straight line and the rotation direction of the stirring shaft 6 is an obtuse angle (as shown in fig. 3, the included angle α is an included angle between the inclined straight line and the rotation direction of the stirring shaft 6).

Specifically, as shown in fig. 3, in this embodiment, the upper layer of paddles 21 has 2 sheets, the whole is horizontally arranged, the middle layer of paddles 22 has 2 sheets, each layer has 2 sheets, the lower layer of paddles 23 has 2 sheets and is obliquely arranged. In the above arrangement, the upper blade 21 and the middle blade 22 mainly play a role in stirring, and the lower blade 23 plays a role in stirring and lifting materials.

In this embodiment, a material flow path control board is further disposed in the mixing and cladding tank 1, the material flow path control board is a spherical cap cover plate 9 disposed at the upper middle portion of the inner cavity of the mixing and cladding tank 1 and above the stirring blade 2, and the inner cavity of the spherical cap cover plate 9 faces the bottom of the mixing and cladding tank 1. The edge of the spherical crown cover plate 9 is closely connected with the inner cavity wall of the mixing coating groove 1, and the stirring shaft 6 penetrates through the topmost end of the spherical crown cover plate 9.

In this embodiment, the ultrasonic device 14 for providing ultrasonic waves to the material in the mixing and cladding tank 1 is provided on the mixing and cladding tank 1.

In this embodiment, the hybrid coating groove 1 is a tapered groove with a large upper part and a small lower part.

In this embodiment, the outer wall of the mixing and cladding tank 1 is provided with a heating component 11, a heat preservation component 8 and a cooling component 12.

In this embodiment, the feeding pipe 3 is arranged above the mixing coating tank 1, the spherical cap cover plate 9 is provided with a through hole for the feeding pipe 3 to pass through, the bottom of the mixing coating tank 1 is provided with the discharging pipe 15, and the feeding pipe 3 and the discharging pipe 15 are provided with the sealing flange 4.

In this embodiment, an air inlet pipe 17, an air outlet pipe 7, a standby valve port 18, a safety valve port 19 and a pressure gauge port 20 are arranged above the mixing and cladding tank 1.

In this embodiment, the mixing and cladding tank 1 is fixed by the fixed cross beam 10, materials (such as biomass hard carbon and pretreated asphalt) are added into the feed pipe 3, and the sealing flange 4 is opened to allow the materials to enter the mixing and cladding tank 1. Through heating element 11 control temperature, through intake pipe 17 control inslot atmosphere, agitator motor 5 drives stirring leaf 2 through (mixing) shaft 6 and rotates, provides ascending thrust for the material, and the material forms the vortex form and flows along mixing cladding groove 1 middle part downward movement under spherical cap apron 9 and the action of gravity, realizes the intensive mixing of material, and the cladding is effectual. After the mixed coating is finished, the material can be discharged by opening the sealing flange 4 on the discharging pipe 15, and the mixed coating is finished. Meanwhile, the ultrasonic device 14 is matched, so that the materials can be fully mixed, the mixing uniformity of the mixed materials is higher than 97%, the coating uniformity is improved, and the coating effect is better.

Example 2:

the hybrid cladding apparatus of this embodiment is substantially the same as that of embodiment 1, with the main difference that the upper blade 21 is disposed horizontally near one end of the stirring shaft 6, and the other end of the upper blade 21 away from the stirring shaft 6 is disposed obliquely for driving the material in contact therewith to move upward, in the same manner as the lower blade 23 (even if the oblique manner of the other end of the upper blade 21 away from the stirring shaft 6 is replaced by the oblique manner of the lower blade 23). Through the setting of above-mentioned upper paddle 21, the one end that upper paddle 21 is close to (mixing) shaft 6 mainly plays the stirring effect, and the one end that keeps away from (mixing) shaft 6 still assists to make the material that is located the groove edge rise, cooperates with lower paddle 23, and material flow path control effect is better, and the cladding effect is mixed to the material better.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The mixing coating device is characterized by comprising a mixing coating groove (1), wherein stirring paddles for driving materials in the mixing coating groove (1) to move are arranged in the mixing coating groove (1), each stirring paddle comprises a stirring shaft (6) and stirring blades (2), and each stirring blade (2) comprises an upper layer paddle (21), a middle layer paddle (22) and a lower layer paddle (23) which are arranged on the stirring shaft (6) along different heights;

one end of the upper layer blade (21) close to the stirring shaft (6) is in a flat plate shape, and a connecting line between the upper layer blade and the stirring shaft (6) is kept horizontal;

the middle layer blade (22) is in a flat plate shape and is horizontally arranged;

the lower blade (23) is in a flat plate shape, a connecting line between the lower blade and the stirring shaft (6) is an inclined straight line, and an included angle alpha between the inclined straight line and the rotation direction of the stirring shaft (6) is an obtuse angle.

2. The hybrid cladding device according to claim 1, wherein the upper blade (21) is arranged horizontally near one end of the stirring shaft (6), and the other end of the upper blade (21) away from the stirring shaft (6) is arranged obliquely for driving the material in contact therewith to move upwards.

3. The mixing and coating device according to claim 1, wherein a material flow path control plate is further arranged in the mixing and coating tank (1), the material flow path control plate is a spherical cap cover plate (9) arranged at the upper middle part of the inner cavity of the mixing and coating tank (1) and positioned above the stirring blade (2), and the inner cavity of the spherical cap cover plate (9) faces the bottom of the mixing and coating tank (1).

4. A hybrid cladding device according to claim 3, wherein the edge of the spherical cap plate (9) is in close contact with the inner cavity wall of the hybrid cladding tank (1), and the stirring shaft (6) is arranged through the topmost end of the spherical cap plate (9).

5. The hybrid cladding device according to any one of claims 1-4, wherein the hybrid cladding tank (1) is provided with ultrasonic means (14) for providing ultrasonic waves to the material in the hybrid cladding tank (1).

6. The hybrid cladding device according to any one of claims 1-4, wherein the hybrid cladding tank (1) is a tapered tank with a large top and a small bottom.

7. The hybrid cladding device according to any one of claims 1-4, wherein the outer wall of the hybrid cladding tank (1) is provided with a heating assembly (11), a heat preservation assembly (8) and a cooling assembly (12).

8. The mixing and cladding device according to claim 3 or 4, wherein a feed pipe (3) is arranged above the mixing and cladding tank (1), a through hole for the feed pipe (3) to pass through is arranged on the spherical cap cover plate (9), a discharge pipe (15) is arranged at the bottom of the mixing and cladding tank (1), and sealing flanges (4) are arranged on the feed pipe (3) and the discharge pipe (15).

9. The hybrid cladding device according to any one of claims 1-4, wherein an air inlet pipe (17), an air outlet pipe (7), a safety valve port (19) and a pressure gauge port (20) are arranged above the hybrid cladding tank (1).

10. The hybrid cladding device according to any one of claims 1-4, wherein a stirring motor (5) is connected to the stirring shaft (6).