CN220918890U

CN220918890U - Transfer tank of battery slurry and treatment system of battery coating slurry

Info

Publication number: CN220918890U
Application number: CN202322554571.7U
Authority: CN
Inventors: 冯言华
Original assignee: Beijing CHJ Automobile Technology Co Ltd
Current assignee: Beijing CHJ Automobile Technology Co Ltd
Priority date: 2023-09-19
Filing date: 2023-09-19
Publication date: 2024-05-10
Anticipated expiration: 2033-09-19

Abstract

The embodiment of the utility model provides a transfer tank of battery slurry and a treatment system of battery coating slurry. The transfer tank for the battery slurry comprises a tank body, a first stirring piece and a second stirring piece. The tank body is a vertical tank body; the first stirring piece with the second stirring piece rotationally sets up on the jar body, just the rotational speed of first stirring piece is less than the stirring speed of second stirring piece, first stirring piece is located the below of second stirring piece, first stirring piece is including continuous first actuating lever and first stirring rake, first stirring rake is relative first actuating lever slope sets up. Therefore, the transfer tank of the battery slurry has the advantage of improving the uniformity of slurry uniformity, and simultaneously avoids the problems of bubbles and sedimentation of the slurry.

Description

Transfer tank of battery slurry and treatment system of battery coating slurry

Technical Field

The utility model relates to the technical field of battery processing, in particular to a transfer tank of battery slurry and a battery coating slurry treatment system of the transfer tank with the battery slurry.

Background

The manufacturing of the lithium ion battery pole piece is a key process of battery production, so the quality of a lithium ion battery product is directly determined by the pole piece coating process. In the pole piece coating process, the viscosity of the slurry changes along with the temperature change of the slurry during storage, the fluctuation of the viscosity causes poor pole piece coating effect, and finally poor consistency of battery products is caused. In the preparation process of the battery, discharged slurry can be temporarily stored in a transfer tank for coating, and the storage quality of the slurry in the transfer tank is critical for the next coating process, so that the consistency of the appearance, thickness and surface density of the pole piece is affected, and the quality of the lithium ion battery is further affected.

In the related art, a stirring paddle with a motor is generally disposed in a transfer tank of battery slurry. In practical application, if the rotation speed of the stirring paddle is higher, bubbles can possibly be introduced, the slurry is coated with films often to generate bubbles, exposed foils, empty foils and other defects during coating, so that quality is abnormal, the lower rotation speed can not guarantee the stirring effect of the slurry, the slurry is easy to settle, the filter element can be blocked, and the problem that the slurry cannot be coated exists.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems in the related art to some extent. To this end, an embodiment of the present utility model proposes a transfer pot for battery paste. The transfer tank of the battery slurry has the advantage of improving uniformity of slurry homogenization, and simultaneously, the problems of bubbles and sedimentation of the slurry are avoided.

The embodiment of the utility model also provides a processing system of the battery coating slurry.

The transfer tank for the battery slurry comprises a tank body, a first stirring piece and a second stirring piece.

The tank body is a vertical tank body; the first stirring piece with the second stirring piece rotationally sets up on the jar body, just the rotational speed of first stirring piece is less than the stirring speed of second stirring piece, first stirring piece is located the below of second stirring piece, first stirring piece is including continuous first actuating lever and first stirring rake, first stirring rake is relative first actuating lever slope sets up.

According to the transfer tank for the battery slurry, the first stirring piece and the second stirring piece which are arranged in the up-down direction are arranged, the rotation speed of the first stirring piece is smaller than that of the second stirring piece, two different stirring speeds in the up-down direction can be formed through the additionally arranged first stirring piece positioned below the tank body, and meanwhile, the first stirring paddles are obliquely arranged relative to the first driving rod, so that fluid flows along the extending direction of the tank body and the radial direction of the transfer tank, and further, the shearing force is increased, and the slurry with higher viscosity needs to be increased in rotation speed, so that high-speed shearing is generated on the slurry to achieve the effect of uniform dispersion. Furthermore, the stirring effect is improved, so that uniformity of slurry homogenization is improved, and the problem of slurry viscosity delamination is avoided, because slurry viscosity delamination can lead to uniformity of thickness and surface density of coating. Therefore, the quality of the lithium battery is improved.

Meanwhile, the first stirring piece additionally arranged on the transfer tank of the battery slurry can further improve the stirring uniformity, avoids layering, and can reduce the rotating speed during stirring while achieving the purpose of improving the stirring uniformity compared with the stirring piece. Furthermore, the problem of slurry sedimentation is avoided while the generation of bubbles is reduced. Therefore, the quality of the lithium battery is further improved.

Therefore, the transfer tank of the battery slurry has the advantage of improving the uniformity of slurry uniformity, and simultaneously avoids the problems of air bubbles and sedimentation of the slurry.

In some embodiments, the first stirring paddle extends along the height direction of the tank body, and an included angle between the first stirring paddle and the first driving rod is 30 ° to 60 °.

In some embodiments, the ratio between the length a of the first stirring paddle extending in the radial direction of the tank and the radius of the tank is 4/7 to 6/7.

In some embodiments, the first stirring paddle has a root portion and a top portion which are oppositely disposed, the root portion of the first stirring paddle is connected with the first driving rod, and the direction from the root portion to the top portion of the first stirring paddle is obliquely disposed in the bottom-to-top direction.

In some embodiments, the first driving rod comprises a first rod body and a first driving motor, the first stirring paddle is arranged on the first rod body, the first rod body is rotatably inserted into the tank body from the bottom of the tank body, and the first driving motor is arranged outside the tank body and the free end of the first driving motor is connected with the first rod body.

In some embodiments, the ratio between the stirring speed of the second stirring member and the rotation speed of the first stirring member is 2/5 to 4/5.

In some embodiments, the first stirring paddles have a plurality, and the plurality of first stirring paddles are disposed at intervals along the circumferential direction of the first driving rod.

In some embodiments, the second stirring member includes a second rod body, a second driving motor and a second stirring paddle, wherein the second stirring paddle is arranged on the second rod body, the second rod body is rotatably inserted into the tank body from the top of the tank body, the second driving motor is arranged outside the tank body, and the free end of the second driving motor is connected with the second rod body.

In some embodiments, the second stirring paddle comprises a stirring frame and a reinforcing rod arranged in the stirring frame, and two ends of the reinforcing rod are respectively connected to two sides of the stirring frame.

In some embodiments, the stirring frame includes a first end portion having a first stirring portion obliquely disposed in a top-to-bottom direction along a center-to-rim direction of the can body, a second end portion having a second stirring portion obliquely disposed in a bottom-to-top direction along the center-to-rim direction of the can body, and a connecting rod connected between the first end portion and the second end portion.

In some embodiments, dimples and/or protrusions are provided on the surface of the first paddle.

The battery coating slurry treatment system comprises a feeding system, a solvent system, a stirring tank and a battery slurry transfer tank according to any one of the above, wherein each of the feeding system and the solvent system is communicated with a feed inlet of the stirring tank, and a discharge outlet of the stirring tank is communicated with the battery slurry transfer tank.

Drawings

Fig. 1 is an internal schematic view of a transfer pot according to an embodiment of the present utility model.

Fig. 2 is a schematic structural view of a second stirring member according to an embodiment of the present utility model.

Fig. 3 is a schematic structural view of a first stirring member according to an embodiment of the present utility model.

Fig. 4 is a schematic structural view of another first stirring member according to an embodiment of the present utility model.

Fig. 5 is a schematic view of the structure of fig. 4 in a.

Reference numerals:

a transfer pot 100;

a tank 1;

A first stirring member 2; a first drive lever 21; a first stirring paddle 22; a protrusion 221; root 222; top 223

A second stirring member 3; a second rod body 31; a second drive motor 32; a second stirring paddle 33; a stirring frame 331; a first end 3311; a second end 3312; a connecting rod 3313; reinforcing bars 332.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A transfer tank 100 for battery paste and a treatment system for battery coating paste according to an embodiment of the present utility model are described below with reference to fig. 1 to 5.

The transfer tank 100 for battery slurry according to an embodiment of the present utility model includes a tank body 1, a first stirring member 2, and a second stirring member 3.

The tank body 1 is a vertical tank body, the first stirring piece 2 and the second stirring piece 3 are rotatably arranged on the tank body 1, the rotation speed of the first stirring piece 2 is smaller than that of the second stirring piece 3, the first stirring piece 2 is located below the second stirring piece 3, the first stirring piece 2 comprises a first driving rod 21 and a first stirring paddle 22 which are connected, and the first stirring paddle 22 is obliquely arranged relative to the first driving rod 21.

According to the transfer tank 100 for battery slurry in the embodiment of the utility model, the first stirring member 2 and the second stirring member 3 are arranged in the vertical direction, the rotation speed of the first stirring member 2 is smaller than that of the second stirring member 3, two different stirring speeds in the vertical direction (for example, the vertical direction shown in fig. 1) can be formed by additionally arranging the first stirring member 2 positioned below the tank body 1, and meanwhile, the first stirring paddle 22 is obliquely arranged relative to the first driving rod 21, so that fluid can flow along the extending direction (for example, the vertical direction shown in fig. 1) of the tank body 1 and the radial direction of the transfer tank 100, and further the shearing force is increased, and because the rotation speed needs to be increased to be larger for slurry with higher viscosity, and high-speed shearing is generated for slurry to achieve the effect of uniform dispersion. Furthermore, the stirring effect is improved, so that uniformity of slurry homogenization is improved, and the problem of slurry viscosity delamination is avoided, because slurry viscosity delamination can lead to uniformity of thickness and surface density of coating. Thus, the transfer pot 100 contributes to improving the quality of the lithium battery.

Meanwhile, the first stirring piece 2 additionally arranged on the transfer tank 100 of the battery slurry can further improve the stirring uniformity, avoid layering, and further reduce the rotating speed during stirring while achieving the purpose of improving the stirring uniformity compared with the situation that one stirring piece is arranged. Furthermore, the problem of slurry sedimentation is avoided while the generation of bubbles is reduced. Thus, the transfer pot 100 further improves the quality of the lithium battery.

Therefore, the transfer pot 100 of the battery slurry according to the embodiment of the present utility model has an advantage of improving uniformity of slurry uniformity while also avoiding occurrence of bubbles and sedimentation problems.

The first stirring paddle 22 extends in the height direction of the tank 1, and an included angle α between the first stirring paddle 22 and the first driving rod 21 is 30 ° to 60 °. For example, the angle between the first stirring paddle 22 and the first driving rod 21 may be 45 °.

According to the transfer tank 100 for battery slurry in the embodiment of the utility model, the included angle alpha between the first stirring paddle 22 and the first driving rod 21 is set to be 30-60 degrees, so that the effect of flowing in the vertical direction of fluid and the radial direction of the transfer tank 100 can be improved, the shearing force is increased, and the stirring effect of the first stirring piece 2 is further improved.

Alternatively, the first stirring paddle 22 may be made of a corrosion-resistant metallic material. Such as stainless steel. Thus, the first stirring paddle 22 has an advantage of high structural strength.

The ratio between the length a of the first stirring paddle 22 extending in the radial direction of the tank 1 and the radius of the tank 1 is 4/7 to 6/7.

The transfer tank 100 for battery slurry according to the embodiment of the present utility model is configured such that the ratio between the length of the first stirring paddle 22 extending in the radial direction of the tank 1 and the radius of the tank 1 is set to 4/7 to 6/7. Therefore, the back flow of the slurry can be formed in the area between the top of the first stirring paddle 22 and the tank 1, and the advantage that the stirring effect is influenced by too small length of the first stirring paddle 22 can be avoided. Thereby, the transfer pot 100 further improves the stirring effect of the first stirring member 2.

As shown in fig. 1 and 3, the first stirring paddle 22 has a root 222 and a tip 223 which are oppositely disposed, the root of the first stirring paddle 22 is connected to the first driving rod 21, and the direction of the first stirring paddle 22 from the root to the tip thereof is inclined in the bottom-to-top direction. During stirring, the slurry forms a return flow path, i.e. the slurry in the first stirring paddle 22 moves in a top-down direction, and the area between the first stirring paddle 22 and the pipe body moves from bottom to top. Thus, the transfer pot 100 can further improve the uniformity of stirring.

As shown in fig. 1 and 3, the first driving lever 21 includes a first lever body on which the first stirring paddle 22 is disposed and a first driving motor (not shown) rotatably inserted into the can body 1 from the bottom of the can body 1, the first driving motor being disposed outside the can body 1 and the free end of the first driving motor being connected with the first lever body.

According to the transfer tank 100 for battery slurry, the first driving rod 21 is divided into the first rod body and the first driving motor, and the first rod body is rotatably inserted into the tank body 1 from the bottom of the tank body 1, so that the slurry close to the bottom wall is favorably stirred by the first stirring paddle 22, and the problem of poor homogenizing effect caused by stirring dead angles is avoided.

Further, the first driving motor is connected to the tank 1 through a flange and bolts.

As shown in fig. 1 and 4, the first stirring paddles 22 have a plurality of first stirring paddles 22 disposed at intervals in the circumferential direction of the first driving rod 21. Thereby, the transfer pot 100 further improves the uniformity of stirring.

Further, the plurality of first paddles 22 are disposed at regular intervals in the circumferential direction of the first driving rod 21.

The ratio between the stirring speed of the second stirring member 3 and the rotation speed of the first stirring member 2 is 2/5 to 4/5. In other words, the ratio between the stirring speed of the second stirring member 3 and the rotation speed of the first stirring member 2 is (2-4)/5.

According to the transfer tank 100 for the battery slurry, disclosed by the embodiment of the utility model, the ratio between the stirring speed of the second stirring piece 3 and the rotation speed of the first stirring piece 2 is set to be 2/5 to 4/5, so that the problems that the speed phase difference is too large, sedimentation is easy to occur at the bottom and bubbles are easy to occur due to the too large rotation speed are avoided.

Further, the rotation speed of the second stirring member 3 may be 15 r/min, and the rotation speed of the first stirring member 2 may be 7-12r/min, for example, 10r/min. The results are shown in Table 1.

As shown in fig. 1 and 2, the second stirring member 3 includes a second rod body 31, a second driving motor 32 and a second stirring paddle 33 connected to each other, the second stirring paddle 33 is provided on the second rod body 31, the second rod body 31 is rotatably inserted into the can body 1 from the top of the can body 1, the second driving motor 32 is provided outside the can body 1, and the free end of the first driving motor is connected to the second rod body 31.

In the transfer tank 100 for battery paste according to the embodiment of the present utility model, the second stirring member 3 is divided into the second rod body 31, the second driving motor 32 and the second stirring paddle 33, and the second stirring paddle 33 is disposed on the second rod body 31. Further, the transfer pot 100 has an advantage of simple structure.

Alternatively, the first stirring member 2 and the second stirring member 3 are disposed directly opposite to each other in the up-down direction.

As shown in fig. 1 and 2, the second stirring paddle 33 includes a stirring frame 331 and a reinforcing bar 332 disposed in the stirring frame 331, both ends of the reinforcing bar 332 are respectively connected to both sides of the stirring frame 331, and the second driving motor 32 is connected to the stirring frame 331.

In the transfer tank 100 for battery slurry according to the embodiment of the present utility model, the second stirring paddle 33 is divided into the stirring frame 331 and the reinforcing bar 332, and the reinforcing bar 332 may be provided to reinforce the structure of the stirring frame 331. Thus, the transfer tank 100 has the advantage of high structural stability.

For example, one end of the reinforcing rod 332 is connected to the upper side of the stirring frame 331, and the other end of the reinforcing rod 332 is connected to the lower side of the stirring frame 331. Or one end of the reinforcing rod 332 is connected to the left side of the stirring frame 331, and the other end of the reinforcing rod 332 is connected to the right side of the stirring frame 331.

The reinforcing bar 332 is disposed obliquely to the up-down direction. The reinforcing bar 332 is inclined to provide a certain stirring effect. Thus, the transfer pot 100 has an advantage of further improving the stirring effect.

As shown in fig. 1 and 2, the stirring frame 331 includes a first end portion 3311, a second end portion 3312, and a connecting rod 3313 connected between the first end portion 3311 and the second end portion 3312, which are sequentially arranged from bottom to top, the first end portion 3311 having a first stirring portion arranged obliquely in a direction from top to bottom in a center to edge direction of the can body 1, and the second end portion 3312 having a second stirring portion arranged obliquely in a direction from bottom to top in the center to edge direction of the can body 1.

Alternatively, the first end 3311 and the second end 3312 are symmetrically disposed at both ends of the connecting rod 3313 in the vertical direction. Mixing of the slurry may be achieved by the first end 3311 and the second end 3312 being disposed opposite to each other. Thus, the transfer pot 100 can further enhance the stirring effect.

As shown in fig. 4 and 5, pits and/or projections 221 are provided on the surface of the first stirring paddle 22.

According to the transfer tank 100 for the battery slurry, disclosed by the embodiment of the utility model, the micro-scale flow field can be formed by pits and/or protrusions 221 distributed on the surface of the first stirring paddle 22, so that the low-efficiency shearing area and the ineffective action area of the traditional stirring flow field are reduced, the solid-liquid/liquid-liquid mixture to be dispersed can be rapidly in a state of uniform macroscopic distribution and consistent microscopic dispersion, and the stirring efficiency and the slurry consistency are improved.

The battery coating paste processing system according to the embodiment of the utility model comprises a feeding system, a solvent system, a stirring tank and the battery paste transfer tank 100 according to any one of the above, wherein each of the feeding system and the solvent system is communicated with a feed inlet of the stirring tank, and a discharge outlet of the stirring tank is communicated with the battery paste transfer tank 100.

Therefore, the treatment system of the battery coating slurry according to the embodiment of the utility model has the advantage of improving the uniformity of slurry uniformity, and simultaneously avoids the problems of bubbles and sedimentation of the slurry.

Further, a discharge port of the transfer pot 100 is provided at the top end of the pot body 1 of the transfer pot 100.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a 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 at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. A transfer pot for battery slurry, comprising:

The tank body is a vertical tank body;

The first stirring piece and the second stirring piece, first stirring piece with the second stirring piece rotationally sets up on the jar body, just first stirring piece's rotational speed is less than the stirring speed of second stirring piece, first stirring piece is located the below of second stirring piece, first stirring piece is including continuous first actuating lever and first stirring rake, first stirring rake is relative first actuating lever slope sets up.

2. The transfer pot of battery slurry according to claim 1, wherein the first stirring paddle extends in a height direction of the pot body, and an included angle between the first stirring paddle and the first driving rod is 30 ° to 60 °.

3. The battery slurry transfer pot according to claim 2, wherein the first stirring paddle has a root portion and a tip portion which are oppositely disposed, the root portion of the first stirring paddle is connected to the first driving rod, and the direction from the root portion to the tip portion of the first stirring paddle is inclined in the direction from bottom to top.

4. The battery slurry transfer tank of claim 1, wherein the first driving rod comprises a first rod body and a first driving motor, the first stirring paddle is arranged on the first rod body, the first rod body is rotatably inserted into the tank body from the bottom of the tank body, the first driving motor is arranged outside the tank body, and the free end of the first driving motor is connected with the first rod body.

5. The transfer pot for battery slurry according to claim 1, wherein a ratio between a stirring speed of the second stirring member and a rotation speed of the first stirring member is 2/5 to 4/5.

6. The battery slurry transfer tank of claim 1, wherein the second stirring member comprises a second rod body, a second driving motor and a second stirring paddle which are connected, the second stirring paddle is arranged on the second rod body, the second rod body is rotatably inserted into the tank body from the top of the tank body, the second driving motor is arranged outside the tank body, and the free end of the second driving motor is connected with the second rod body.

7. The transfer pot of battery slurry according to claim 6, wherein the second stirring paddle comprises a stirring frame and reinforcing bars arranged in the stirring frame, and two ends of each reinforcing bar are connected to two sides of the stirring frame.

8. The transfer pot for battery slurry according to claim 7, wherein the stirring frame includes a first end portion having a first stirring portion provided obliquely in a direction from top to bottom in a center-to-edge direction of the pot body, a second end portion having a second stirring portion provided obliquely in a direction from bottom to top in the center-to-edge direction of the pot body, and a connecting rod connected between the first end portion and the second end portion.

9. The transfer pot for battery slurry according to claim 1, wherein pits and/or projections are provided on the surface of the first stirring paddle.

10. The transfer pot for battery slurry according to claim 1, wherein a ratio between a length a of the first stirring paddle extending in a radial direction of the pot body and a radius r of the pot body is 4/7 to 6/7.

11. The battery slurry transfer pot of claim 1, wherein the first paddles have a plurality of the first paddles disposed at spaced intervals along a circumference of the first drive rod.

12. A battery coating slurry treatment system comprising a dosing system, a solvent system, a stirred tank, and a transfer tank for battery slurry according to any one of claims 1-11, each of the dosing system and the solvent system being in communication with a feed port of the stirred tank, a discharge port of the stirred tank being in communication with the transfer tank for battery slurry.