Lithium battery slurry mixing tool and circulating slurry mixing equipment

Abstract

The utility model discloses a lithium battery slurry mixing tool and circulating slurry mixing equipment, and belongs to the technical field of lithium battery slurry mixing equipment. According to the slurry mixing tool for the lithium battery, the rotor and the stator share the same center line, and the rotor rotates around the center line; the rotor comprises a blade center column and a fixed disc located at one end of the blade center column. A plurality of upper dispersing teeth are circumferentially arranged on the side, close to the blade center column, of the fixed disc, and a plurality of lower dispersing teeth are circumferentially arranged on the side, away from the blade center column, of the fixed disc; and the stator is arranged close to the upper dispersing teeth. On one hand, through the interaction of the stator and the rotor, slurry can be fully sheared and can also be fully dispersed, so that the slurry is more uniformly mixed; on the other hand, the slurry can be further sheared and dispersed by the lower dispersing teeth, so that the slurry which is more uniformly mixed and smaller in powder fineness is obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery slurry mixing equipment, and more specifically to a lithium battery slurry mixing tool and a circulating slurry mixing equipment. Background Art

[0002] With the booming development of the lithium battery industry, the requirements for lithium battery performance are getting higher and higher, and the factors that determine its performance include: materials, formula, manufacturing process, etc. Slurry mixing is the first process in lithium battery production. The quality of the prepared slurry determines the performance indicators of lithium batteries. The performance of the slurry is usually evaluated by the viscosity, solid content, fineness, stability and other characteristics of the slurry. These characteristics depend on whether the mixing is sufficient, the wetting effect and the degree of uniform dispersion during the slurry mixing process.

[0003] Different slurry mixing equipment exerts different forces on each component in the slurry, which in turn affects the various properties of the slurry. The circulating high-efficiency slurry mixing equipment adopts the method of mixing the powder evenly first and then gradually adding it, and the liquid is continuously circulated, so that the slurry is always at a low viscosity, ensuring that the slurry can be fully wetted, and can disperse each component evenly by changing the number of cycles and the line speed, further ensuring the consistency of the slurry. When the slurry is circulated and dispersed in the existing circulating slurry mixing equipment, the slurry between the rotor and the stator is insufficiently sheared, resulting in a high slurry fineness. It is difficult to screen when discharging, and it is easy to settle and agglomerate when slowly stirred, which is easy to cause blockage in the subsequent coating process, scratches and pitting on the surface of the pole piece; it will also cause uneven force when rolling the pole piece, which is easy to cause pole piece fracture and local microcracks. The occurrence of the above phenomena will seriously reduce the cycle, rate and safety performance of the lithium battery. Therefore, it is necessary to ensure that the solid particles in the slurry are completely dispersed so that the characteristics of the slurry meet the process requirements. Utility Model Content

[0004] The utility model provides a lithium battery slurry mixing tool and a circulating slurry mixing device, which solves the problem that the slurry is not subjected to sufficient shear force in the existing circulating slurry mixing device, resulting in high slurry fineness.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0006] A lithium battery slurry mixing tool, comprising:

[0007] stator;

[0008] a rotor, the rotor and the stator having a common centerline and the rotor rotating about the centerline;

[0009] The rotor comprises a blade center column and a fixed disc located at one end of the blade center column; a plurality of upper dispersion teeth are circumferentially arranged on a side of the fixed disc close to the blade center column, and a plurality of lower dispersion teeth are circumferentially arranged on a side away from the blade center column; the stator is arranged close to the dispersion teeth.

[0010] Furthermore, the stator comprises an outer ring and an inner ring spaced inside the outer ring, and the upper dispersion teeth are located between the outer ring and the inner ring.

[0011] Furthermore, the outer ring is provided with a plurality of outer through holes along its circumference, and the inner ring is provided with a plurality of inner through holes along its circumference.

[0012] Furthermore, the outer through hole and the inner through hole are waist-shaped holes.

[0013] Furthermore, the upper dispersing teeth and the lower dispersing teeth are chamfered on a side facing the rotational shearing of the rotor.

[0014] Furthermore, the chamfer is set at 45°.

[0015] Furthermore, the upper dispersing teeth are spaced apart near the edge of the fixed disk; the lower dispersing teeth are spaced apart near the edge of the fixed disk, and there is an inclination angle α between the plane where the lower dispersing teeth are located and the edge tangent of the fixed disk.

[0016] Furthermore, the inclination angle α is between 30° and 45°.

[0017] Furthermore, a plurality of blades are arranged on the blade center column at intervals along its circumference.

[0018] The utility model also provides a circulating slurry mixing device, comprising the lithium battery slurry mixing tooling.

[0019] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects: the lithium battery slurry mixing tooling includes a stator and a rotor, and the upper dispersing teeth are arranged on the side of the fixed disc of the rotor close to the central column of the blade, and the lower dispersing teeth are arranged on the side away from the central column of the blade; the stator is arranged close to the upper dispersing teeth. On the one hand, through the interaction between the stator and the rotor, the slurry can be fully sheared and dispersed, so that the slurry is mixed more evenly; on the other hand, the slurry can be further sheared and dispersed by the lower dispersing teeth, thereby obtaining a slurry with a more even mixing and smaller powder fineness, and also improving the quality and stability of the slurry, so as to obtain better quality and production efficiency of the finished battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the stator structure;

[0021] Figure 2 is a schematic diagram of the rotor structure;

[0022] Figure 3 for Figure 2 Schematic diagram of the middle rotor in direction A;

[0023] Figure 4 This is a schematic diagram of the slurry combining tooling structure formed after the stator and rotor are connected.

[0024] Description of labels:

[0025] 1. stator; 11. outer ring; 110. outer through hole; 12. inner ring; 120. inner through hole;

[0026] 2. Rotor; 21. Blade center column; 210. Blade; 22. Fixed disk; 23. Upper dispersion teeth; 24. Lower dispersion teeth. DETAILED DESCRIPTION

[0027] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the drawings and embodiments.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0029] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or positional relationship, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances. "Including" or "comprising" and similar words mean that the elements or objects appearing before "including" or "comprising" include the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects.

[0030] The terms "installed", "set", "provided with", and "connected" referred to herein should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or a drive connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] like Figure 4 As shown, in this embodiment, a lithium battery slurry mixing tool is provided, including a stator 1 and a rotor 2. The rotor 2 and the stator 1 have a common center line, and when the rotor 2 rotates, it rotates around the center line.

[0032] Combination Figure 2 As shown, the rotor 2 includes a blade center column 21 and a fixed disk 22 located at one end of the blade center column 21. A plurality of blades 210 are arranged at intervals along the circumference of the blade center column 21, and the outer diameter of the blade center column 21 gradually increases toward the direction close to the fixed disk 22. The blades 210 are arranged at intervals along the circumference of the blade center column 21 outside, and the blades 210 twist in the process of extending toward the direction close to the fixed disk 22, so that the blades 210 are spiral. A plurality of dispersion teeth are connected to the fixed disk 22, and the dispersion teeth include upper dispersion teeth 23 and lower dispersion teeth 24. Specifically, a plurality of upper dispersion teeth 23 are arranged circumferentially on one side of the fixed disk 22 close to the blade center column 21, and the upper dispersion teeth 23 are arranged at intervals; a plurality of lower dispersion teeth 24 are arranged circumferentially on the side away from the blade center column 21, and the lower dispersion teeth 24 are arranged at intervals. The stator 1 is arranged close to the upper dispersion teeth 23. In the slurry mixing device, the slurry formed by mixing solid powder and liquid is guided to the upper dispersing teeth 23 through the blades 210. Since the initial slurry viscosity is low, when the rotor 2 rotates rapidly, the upper dispersing teeth 23 quickly shear and disperse the slurry, and then the slurry flows to the lower dispersing teeth 24, which further shear and disperse the slurry. Dispersing teeth are arranged on both sides of the fixed disc 22 of the rotor 2, and the slurry is fully sheared and dispersed by the upper dispersing teeth 23 and the lower dispersing teeth 24, so as to obtain a slurry with more uniform mixing and smaller powder fineness.

[0033] Furthermore, the upper dispersing teeth 23 are arranged at intervals near the edge of the fixed disc 22, and the intervals between two adjacent upper dispersing teeth 23 are consistent; the lower dispersing teeth 24 are arranged at intervals near the edge of the fixed disc 22, and the intervals between two adjacent lower dispersing teeth 24 are consistent. At the same time, the upper dispersing teeth 23 and the lower dispersing teeth 24 are chamfered on the side facing the rotation shearing of the rotor 2. In this embodiment, the chamfer is set to 45°. The upper dispersing teeth 23 and the lower dispersing teeth 24 are chamfered on the side facing the shearing slurry, so that the shearing sides of the upper dispersing teeth 23 and the lower dispersing teeth 24 are set sharper, which can better shear the slurry.

[0034] like Figure 3 As shown, there is an inclination angle α between the plane where the lower dispersing teeth 24 are located and the edge tangent of the fixed disc 22. In this embodiment, the inclination angle α is 30°. In other embodiments, the inclination angle α can also be set to other values ​​between 30° and 45°. The lower dispersing teeth 24 are inclined so that the lower dispersing teeth 24 can shear the slurry on the one hand and disperse the slurry better on the other hand during the rotation process.

[0035] like Figure 1 As shown, the stator 1 includes an outer ring 11 and an inner ring 12 located inside the outer ring 11. A certain gap is provided between the outer ring 11 and the inner ring 12. When the stator 1 is arranged close to the upper dispersion teeth 23, the upper dispersion teeth 23 are located between the outer ring 11 and the inner ring 12. A plurality of outer through holes 110 are provided along the circumference of the outer ring 11, and a plurality of inner through holes 120 are provided along the circumference of the inner ring 12. The outer through holes 110 and the inner through holes 120 are waist-shaped holes, and the waist-shaped holes are provided along the axial direction of the outer ring 11 and the inner ring 12. In other embodiments, the outer through holes 110 and the inner through holes 120 may also be long square holes.

[0036] Recombination Figure 4 As shown, in this embodiment, the outer through hole 110 and the inner through hole 120 can form a flow channel for the slurry. When the rotor 2 rotates at high speed, the slurry is driven to circulate at high speed, so that the slurry is also sheared by the outer through hole 110 and the inner through hole 120. The slurry flows down along the blade 210, enters through the inner through hole 120 and flows to the upper dispersion teeth 23, and the upper dispersion teeth 23 rotate at high speed to shear and disperse the slurry. In this process, the slurry is driven to flow through the outer through hole 110 and the inner through hole 120 at the same time, so that the outer through hole 110 and the inner through hole 120 can also shear the slurry. Afterwards, the slurry flows to the lower dispersion teeth 24 and is sheared and dispersed again. Through the interaction between the stator 1 and the rotor 2, the slurry can also be fully dispersed, so that the slurry is mixed more evenly.

[0037] A circulating slurry mixing device, comprising the lithium battery slurry mixing tooling, can obtain slurry with more uniform mixing and smaller powder fineness.

[0038] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A lithium battery slurry mixing tool, comprising: Stator (1); A rotor (2), wherein the rotor (2) and the stator (1) have a common center line and the rotor (2) rotates around the center line; Features: The rotor (2) comprises a blade center column (21) and a fixed disc (22) located at one end of the blade center column (21); a plurality of upper dispersion teeth (23) are circumferentially arranged on a side of the fixed disc (22) close to the blade center column (21), and a plurality of lower dispersion teeth (24) are circumferentially arranged on a side of the fixed disc (22) away from the blade center column (21); and the stator (1) is arranged close to the dispersion teeth.

2. The lithium battery slurry mixing tool according to claim 1, characterized in that: The stator (1) comprises an outer ring (11) and an inner ring (12) spaced inside the outer ring (11), and the upper dispersion teeth (23) are located between the outer ring (11) and the inner ring (12).

3. The lithium battery slurry mixing tool according to claim 2, characterized in that: The outer ring (11) is provided with a plurality of outer through holes (110) along its circumference, and the inner ring (12) is provided with a plurality of inner through holes (120) along its circumference.

4. The lithium battery slurry mixing tool according to claim 3, characterized in that: The outer through hole (110) and the inner through hole (120) are waist-shaped holes.

5. The lithium battery slurry mixing tool according to any one of claims 1 to 4, characterized in that: The upper dispersing teeth (23) and the lower dispersing teeth (24) are chamfered on the side facing the rotational shearing of the rotor (2).

6. The lithium battery slurry mixing tool according to claim 5, characterized in that: The chamfer is set at 45°.

7. The lithium battery slurry mixing tool according to claim 5, characterized in that: The upper dispersing teeth (23) are arranged at intervals close to the edge of the fixed disc (22); the lower dispersing teeth (24) are arranged at intervals close to the edge of the fixed disc (22), and an inclination angle α exists between the plane where the lower dispersing teeth (24) are located and the edge tangent of the fixed disc (22).

8. The lithium battery slurry mixing tool according to claim 7, characterized in that: The inclination angle α is between 30° and 45°.

9. The lithium battery slurry mixing tool according to claim 1, characterized in that: A plurality of blades (210) are arranged on the blade central column (21) at intervals along its circumferential direction.

10. A circulating pulping equipment, characterized in that: A lithium battery slurry mixing tool comprising the lithium battery slurry mixing tool as described in any one of claims 1 to 9.

Images