Lithium battery mixed slurry filtering device

Abstract

The utility model provides a lithium battery slurry mixing and filtering device which comprises a filter cartridge with two through ends, a rod body is arranged on the central axis of the filter cartridge, a separation disc and a primary screening barrel are respectively sleeved at the two ends of the rod body, the barrel bottom of the primary screening barrel faces the separation disc and is movably connected with the rod body, and a re-filter cartridge arranged in the filter cartridge is arranged between the primary screening barrel and the separation disc. The two ends of the re-filtering cylinder, the separating disc and the primary screening barrel form a first filtering space, and an interlayer between the re-filtering cylinder and the filtering cylinder forms a secondary filtering space; large particles can be filtered out through the primary screening barrel, separation of the large particles and small particles is achieved, meanwhile, layered filtering can be conducted, the filtering efficiency is improved, and meanwhile the trouble of replacing the filter cylinder is reduced; according to the utility model, the primary screening barrel can slide in the filter cylinder, and the rotating speed of the primary screening barrel is constantly changed under the action of the tension spring, so that particles are effectively prevented from blocking the screening holes.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium batteries, and in particular to a lithium battery slurry filtration device. Background Technology

[0002] Slurry preparation is the first step in lithium battery manufacturing. It is also known as batching, homogenization, mixing, or pulping. Slurry preparation involves adding positive and negative electrode active materials, conductive agents, binders, additives, and solvents to a mixer in a specific ratio and order. After mixing, the slurry needs to be sieved and filtered to remove impurities such as electrolytes, thus ensuring the purity of the battery slurry.

[0003] Existing methods for filtering lithium battery slurry use filter cartridges. However, because the slurry contains electrolyte impurities of different sizes and has a certain viscosity, large electrolytic impurities can clog the filter mesh when using a filter cartridge, requiring the filter cartridge or filtration equipment to be replaced. This is inconvenient for filtering small particles. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a lithium battery slurry filtration device to solve the problem of cumbersome operation caused by the need to replace the filter cartridge every time the slurry is filtered.

[0005] Based on the technical problems existing in the background art, this utility model proposes a lithium battery slurry filtration device, including a filter cylinder with open ends, a rod set on the central axis of the filter cylinder, a separation plate and a primary screening barrel respectively sleeved at both ends of the rod, the bottom of the primary screening barrel facing the separation plate and movably connected to the rod, a secondary filter cylinder installed between the primary screening barrel and the separation plate and placed inside the filter cylinder, the two ends of the secondary filter cylinder, the separation plate and the primary screening barrel form a first filtration space, and the interlayer between the secondary filter cylinder and the filter cylinder forms a secondary filtration space.

[0006] In the above scheme, the slurry is initially screened through the primary screening tank to separate large and small particles. The large and small particles are then filtered separately. The reciprocating rotation of the rod drives the primary screening tank and the secondary filter cylinder to rotate, increasing the mobility of the particles. This prevents the particles from sticking to the inner wall of the cylinder and causing a centrifugal effect, thus accelerating the filtration of the particles.

[0007] Preferably, the outer ring wall of the primary screening barrel and the separation disc supports the inner wall of the secondary filter cylinder.

[0008] In the above scheme, the primary screening barrel and the separation disc can support the secondary filter cylinder, providing a supporting frame for the secondary filter cylinder and preventing the secondary filter cylinder from deforming or swaying inside the filter cylinder under high-speed rotation.

[0009] Preferably, the bottom of the primary screening barrel is provided with multiple screen holes, and the diameter of the screen holes gradually increases along the diameter direction of the primary screening barrel.

[0010] In the above scheme, the sieve holes at the bottom of the primary screening barrel are used to screen particles. The bottom of the barrel is hemispherical. When rotating, the particles will disperse from the center of the bottom of the barrel to the periphery of the barrel. The sieve holes gradually increase in size from the center of the bottom of the barrel to the edge of the bottom of the barrel. The particles are separated and fall in order from small to large, which can separate the particles in an orderly manner, while filtering out larger particles and avoiding clogging.

[0011] Preferably, the side of the primary screening barrel facing the separation disc is connected to a ring via a pull rod, and a disc is provided in the middle of the rod. The disc is located on the side of the ring facing the separation disc, and the ring and the disc are connected by a tension spring.

[0012] In the above scheme, when the rod rotates, the primary screening barrel can be slowly accelerated by the tension spring. Under the action of the tension spring, the primary screening barrel can rotate at a different speed than the rod. The rotation speed of the primary screening barrel is constantly changing, which can improve the particle separation effect of the primary screening barrel.

[0013] Preferably, a spindle-shaped column is provided in the middle of the rod, and the ring can slide along the axial direction of the rod on the outer wall of the spindle-shaped column.

[0014] In the above scheme, the spindle-shaped column of the rod allows the ring to swing at the spindle-shaped column, thereby causing the entire primary screening barrel to swing and increase the filtration effect.

[0015] Preferably, the filter cartridge includes an inner membrane and an absorption membrane, with the inner membrane fitted over the outer side of the absorption membrane.

[0016] In the above scheme, the double-layer filtration of the filter cartridge 7 can achieve a better filtration effect.

[0017] Preferably, the side wall of the filter cartridge has multiple filter holes.

[0018] Compared with the prior art, the lithium battery slurry filtration device proposed in this utility model adopts the above-mentioned technical solution and achieves the following technical effects:

[0019] This invention can filter out larger particles through a primary screening barrel, achieving separation of large and small particles. It can also perform layered filtration, which not only improves filtration efficiency but also reduces the hassle of replacing filter cartridges. In this invention, the primary screening barrel can slide inside the filter cartridge, and its rotation speed can be changed at any time under the action of a tension spring, effectively preventing particles from clogging the screen holes. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall assembly of this utility model. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the overall assembly of this utility model. Figure 2 ;

[0022] Figure 3 Schematic diagram of the internal assembly of the filter cartridge of this utility model Figure 1 ;

[0023] Figure 4 Schematic diagram of the internal assembly of the filter cartridge of this utility model Figure 2 ;

[0024] Figure 5 This is a schematic diagram of the filter cartridge structure of this utility model;

[0025] Figure 6 This is a schematic diagram of the rod structure of this utility model;

[0026] Figure 7 This is a schematic diagram of the absorption filter membrane structure of this utility model;

[0027] Figure 8 This is a schematic diagram of the suction screening barrel structure of this utility model;

[0028] Figure 9 This is a schematic diagram of the bottom structure of the suction screening barrel of this utility model.

[0029] In the diagram: 1. Filter cylinder; 3. Rod; 4. Primary sieve; 7. Secondary filter cylinder; 41. Sieve hole; 63. Pull rod; 61. Ring; 32. Disc; 62. Tension spring; 31. Spindle-shaped column; 71. Inner membrane; 72. Absorption membrane; 11. Filter hole. Detailed Implementation

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] Example

[0033] Please refer to Figures 1-9 This utility model proposes a lithium battery slurry filtration device. Slurry filtration typically involves pouring slurry into the filtration device and then centrifugally stirring it using a motor. This design includes a filter cylinder 1 with open ends. A rod 3 is positioned along the central axis of the filter cylinder 1. A separation disc and a primary screening barrel 4 are respectively fitted onto the two ends of the rod 3. The end of the filter cylinder 1 furthest from the primary screening barrel 4 is sealed with a bottom plate. The bottom of the primary screening barrel 4 faces the separation disc and is movably connected to the rod 3. A secondary filter cylinder 7 is installed between the primary screening barrel 4 and the separation disc, placed inside the filter cylinder 1. The two ends of the secondary filter cylinder 7, together with the separation disc and the primary screening barrel 4, form a first filtration space. The interlayer between the secondary filter cylinder 7 and the filter cylinder 1... A secondary filtration space is formed. In operation, the slurry needs to be poured into one end of the primary screening tank 4 first. The rod 3 needs to be connected to the drive motor. The axis of the filter cylinder 1 needs to be perpendicular to the ground. When the motor is running, it can drive the primary screening tank 4 to rotate and separate large and small particles. Small particles will be screened into the secondary screening tank and gradually dissolved. Under the action of high-speed centrifugation, the slurry will adhere to the outer wall of the secondary filter cylinder 7 for filtration. The filtered slurry will be located in the secondary filtration space and flow out from the filter hole 11 on the side wall of the filter cylinder 1. In this scheme, large particles will not affect the filtration of small particles, thus improving the filtration effect.

[0034] In a specific embodiment, refer to Figures 1-7 The outer ring wall of the primary screening barrel 4 and the separation plate supports the inner wall of the secondary filter cylinder 7. In this application, the primary screening barrel 4 and the separation plate are located at the two ends supporting the secondary filter cylinder 7, so that the secondary filter cylinder 7 can form a cylindrical shape. In this application, the secondary filter cylinder 7 can also be combined with the separation plate to form a barrel body for installation.

[0035] In a specific embodiment, refer to Figures 8-9 The bottom of the primary screening barrel 4 is provided with multiple sieve holes 41. The diameter of the sieve holes 41 gradually increases along the diameter direction of the primary screening barrel 4. The primary screening barrel 4 is a barrel with a hemispherical bottom that protrudes outward. When the entire device is running, the particles in the primary screening barrel 4 will be thrown from the bottom to the edge of the barrel. When the bottom of the barrel is hemispherical, it can make the movement of particles smoother, improve the dispersion effect of particles in the barrel, and improve efficiency.

[0036] In a specific embodiment, refer to Figure 1 The primary screening barrel 4, facing the separation disc, is connected to a ring 61 via a pull rod 63. A disc 32 is located in the middle of the rod 3, on the side of the ring 61 facing the separation disc. The ring 61 and the disc 32 are connected by a tension spring 62. The rod 3 rotates reciprocally. When the rod 3 rotates clockwise, the primary screening barrel 4 is stationary and thus has inertia. The rod 3 pulls the tension spring 62 through the disc 32, causing the tension spring 62 to extend. At this time, the primary screening barrel 4 moves closer to the disc 32. When the rod 3 rotates counterclockwise, the tension spring 62 contracts, causing the primary screening barrel 4 to rotate clockwise. The primary screening barrel 4 slides away from the disc 32. This allows the primary screening barrel 4 to slide along the rod 3 during reciprocating rotation, causing the particles on the primary screening barrel 4 to be shaken and their positions changed.

[0037] In a specific embodiment, refer to Figure 6 , Figure 8 , Figure 9 A spindle-shaped column 31 is provided in the middle of the rod body 3. The ring 61 can slide along the axis of the rod body 3 on the outer wall of the spindle-shaped column 31. In this solution, the primary screening barrel 4 only slides along the rod body 3. When the ring 61 connected to the primary screening barrel 4 passes the spindle-shaped column 31, the ring 61 will swing at this point because the diameter of the spindle-shaped column 31 is smaller than the diameter of the inner ring of the ring 61, causing the primary screening barrel 4 to swing. Of course, the connection between the primary screening barrel 4 and the rod body 3 needs to be softened with rubber.

[0038] In a specific embodiment, refer to Figure 2 , Figure 3 , Figure 4 , Figure 7 The double filter cartridge 7 includes an inner membrane 71 and an absorption filter membrane 72. The inner membrane 71 is fitted over the outer side of the absorption filter membrane 72. The double-layer filtration of the double filter cartridge 7 can achieve a better filtration effect.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lithium battery slurry filtration device, characterized in that, It includes a filter cartridge with open ends, a rod is set on the central axis of the filter cartridge, and a separation plate and a primary screening barrel are respectively fitted on both ends of the rod. The bottom of the primary screening barrel faces the separation plate and is movably connected to the rod. A secondary filter cartridge is installed between the primary screening barrel and the separation plate and placed inside the filter cartridge. The two ends of the secondary filter cartridge, the separation plate and the primary screening barrel form a first filtration space, and the interlayer between the secondary filter cartridge and the filter cartridge forms a secondary filtration space.

2. The lithium battery slurry filtration device according to claim 1, characterized in that, The outer ring wall of the primary screening barrel and the separation plate supports the inner wall of the secondary filter cylinder.

3. The lithium battery slurry filtration device according to claim 1, characterized in that, The bottom of the primary screening barrel is equipped with multiple sieve holes, and the diameter of the sieve holes gradually increases along the diameter direction of the primary screening barrel.

4. The lithium battery slurry filtration device according to claim 1, characterized in that, The primary screening barrel facing the separation disc is connected to a ring via a pull rod. A disc is located in the middle of the rod, on the side of the ring facing the separation disc. The ring and the disc are connected by a tension spring.

5. The lithium battery slurry filtration device according to claim 4, characterized in that, A spindle-shaped column is provided in the middle of the rod, and the ring can slide along the axis of the rod on the outer wall of the spindle-shaped column.

6. The lithium battery slurry filtration device according to claim 1, characterized in that, The double filter cartridge includes an inner membrane and an absorption filter membrane, with the inner membrane covering the outer side of the absorption filter membrane.

7. The lithium battery slurry filtration device according to claim 1, characterized in that, The side wall of the filter cartridge has multiple filter holes.

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