Slurry mixing device for positive electrode slurry of lithium battery

Abstract

The utility model discloses a slurry mixing device of lithium battery positive electrode slurry, including bracing frame and mixing tank, the mixing tank is installed and connected on the upper end position of the inner side of bracing frame, in the utility model, through the cooperation use of filtration subassembly, cylinder, rolling subassembly and feed hopper, can filter the lithium battery positive electrode slurry, and the mixing tank is installed and connected on the upper end position of the inner side of the bracing frame. When the filter assembly is installed, the filter assembly is conveniently clamped in the corresponding clamping grooves of the feeding hopper through the connecting grooves in the ends of the two sides of the fixing frame, and the filter assembly is connected and installed in a clamping mode, so that disassembly and assembly are convenient, and follow-up disassembly, cleaning or replacement are facilitated; according to the lithium battery positive electrode slurry filtering device, the lithium battery positive electrode slurry can be filtered, large blocky particle raw materials are intercepted at the upper end of the filtering steel plate by the filtering net holes, and after filtering, subsequent better stirring is facilitated, mixing is more sufficient and uniform, and therefore the quality of the lithium battery positive electrode slurry can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a slurry mixing device for lithium battery positive electrode slurry. Background Art

[0002] The lithium battery industry mostly uses oily slurry, which is a mixture formed by stirring, kneading and dispersing active substances, binders, conductive agents, solvents, etc. in a certain ratio and sequence. The production of positive electrode slurry for lithium-ion batteries is the first step in the battery manufacturing process. It is the basis of the battery cell production and manufacturing process and one of the important processes that determines whether the electrode sheet can meet the design requirements of the battery cell. When the positive electrode slurry of the lithium battery is mixed, a mixing device for the positive electrode slurry of the lithium battery is needed.

[0003] The existing Chinese patent CN210229707U disclosed a lithium battery slurry stirring device on April 3, 2020, including a stirring tank and a stirring assembly. A stirring chamber is provided in the stirring tank, and a feed inlet is provided at the top of the stirring tank. The stirring assembly includes a motor, a first stirring blade, and a motor protection cover; an annular block is fixed to the bottom of the stirring chamber, and a plurality of elastic convex balls are provided on the top of the annular block, and the top of the elastic convex balls is connected to the top of the stirring chamber; the motor is installed and fixed at the bottom center of the stirring chamber, and the motor shaft of the motor is vertically upward, and the first stirring blade and the motor protection cover are both installed and fixed on the motor shaft of the motor; the top surface of the motor protection cover is an arc-shaped structure; and a plurality of second stirring blades are fixed on the side of the motor protection cover. The above patent can stir dead corners during the stirring process, thereby improving the stirring effect of the lithium battery slurry; it can effectively remove iron filings in the lithium battery slurry, and the iron filings can be stored inside. However, the above lithium battery slurry stirring device lacks a filtering mechanism during use. If the slurry contains block-like granular raw material impurities, it will affect the mixing and stirring of the slurry, causing uneven mixing between the ingredients, thereby affecting the performance of the battery. Therefore, further improvement is needed. Utility Model Content

[0004] The purpose of the utility model is to provide a slurry mixing device for lithium battery positive electrode slurry, so as to solve the problem that an existing lithium battery slurry stirring device proposed in the above background technology lacks a filtering mechanism during use. If the slurry contains block-shaped particle raw material impurities, it will affect the mixing and stirring of the slurry, causing uneven mixing between the ingredients, thereby affecting the battery performance.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a slurry mixing device for lithium battery positive electrode slurry, comprising a support frame and a mixing tank, the mixing tank is installed and connected to the inner upper end position of the support frame, the lower end of the support frame is provided with supporting legs, an L-shaped fixing plate is provided at the left edge of the support frame, a cylinder is provided at the upper end of the L-shaped fixing plate, a rolling assembly is provided at the front end of the cylinder, a filtering assembly is provided at the lower end of the rolling assembly, a feeding hopper is provided on the support frame around the outer side of the filtering assembly, a stirring motor is provided on the support frame at the top end of the mixing tank, a stirring paddle is provided at the bottom end of the stirring motor, and a slurry discharge pipe is provided on the lower side of the front end of the mixing tank.

[0006] Among them, the filter assembly includes a filter mesh, a filter steel plate, a fixed frame and a connecting groove. A filter steel plate is arranged on the inner side of the fixed frame, a filter mesh is arranged on the upper end face of the filter steel plate, connecting grooves are arranged at the ends of both sides of the fixed frame, and the fixed frame is connected to the feeding hopper through the connecting grooves.

[0007] Among them, the rolling assembly includes a connecting sleeve, a limiting steel bolt, a connecting block and a rolling block. A connecting sleeve is arranged on the outer side of the left end of the connecting block, a limiting steel bolt is arranged on the upper end of the connecting sleeve, a rolling block is arranged on the bottom end of the connecting block, and the connecting block is connected to the cylinder through the connecting sleeve.

[0008] Wherein, the cylinder and the rolling assembly are connected and installed by means of sleeve connection, and the rolling assembly is connected to the output rod of the cylinder.

[0009] The filter assembly and the feeding hopper are connected and installed by means of a snap-fitting manner, and the filter assembly is connected to the inner upper end position of the feeding hopper.

[0010] Wherein, a valve switch is also arranged at the upper end of the slurry discharge pipe.

[0011] In summary, due to the adoption of the above technology, the beneficial effects of the utility model are:

[0012] 1. In the utility model, the positive electrode slurry of the lithium battery can be filtered by the combination of the filter assembly, the cylinder, the rolling assembly and the feeding hopper, so as to facilitate subsequent stirring and mixing. When installing the filter assembly, first, the connecting grooves at the ends of both sides of the fixed frame are conveniently snapped into the corresponding slots of the feeding hopper, and the snap-on connection and installation make it easy to disassemble and assemble, and convenient for subsequent disassembly, cleaning or replacement. When in use, the positive electrode slurry of the lithium battery can be filtered through the filter mesh holes on the upper end face of the filter steel plate, so that the larger block-shaped particle raw materials are intercepted by the filter mesh holes at the upper end of the filter steel plate, and after filtering, so as to facilitate subsequent stirring, the mixing is more sufficient and uniform, thereby helping to improve the quality of the positive electrode slurry of the lithium battery.

[0013] 2. In the utility model, the block-shaped granular raw materials can be scattered by using the rolling assembly and the cylinder. When installing the rolling assembly, first, the connecting sleeve on the outer side of the left end of the connecting block is sleeved on the cylinder output rod, and further a limit steel bolt is used to limit and fix it so that it will not loosen during use. When in use, the cylinder output rod pushes the connecting block back and forth, so that the rolling block at the bottom of the connecting block rolls back and forth on the end face of the filter assembly. After rolling, the block-shaped granular raw materials can be scattered. This can avoid waste to the maximum extent on the one hand, and facilitate subsequent stirring and mixing more fully on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front structural schematic diagram of a slurry mixing device for lithium battery positive electrode slurry according to the utility model;

[0015] Figure 2 This is a structural schematic diagram of a slurry mixing device for lithium battery positive electrode slurry according to the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of a filter assembly of a slurry mixing device for lithium battery positive electrode slurry according to the utility model;

[0017] Figure 4 The utility model is a schematic diagram of the structure of a rolling assembly of a slurry mixing device for lithium battery positive electrode slurry.

[0018] In the figure: 1. Support leg; 2. Support frame; 3. L-shaped fixing plate; 4. Cylinder; 5. Rolling assembly; 51. Connecting sleeve; 52. Limiting steel bolt; 53. Connecting block; 54. Rolling block; 6. Stirring motor; 7. Mixing tank; 8. Slurry discharge pipe; 9. Filter assembly; 91. Filter mesh; 92. Filter steel plate; 93. Fixed frame; 94. Connecting groove; 10. Stirring paddle; 11. Feeding hopper. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0020] Embodiment 1

[0021] Reference Figure 1 , Figure 2 and Figure 3 A slurry mixing device for positive electrode slurry of lithium battery comprises a support frame 2 and a mixing tank 7. The mixing tank 7 is installed and connected to the inner upper end position of the support frame 2. Support legs 1 are arranged around the lower end of the support frame 2. An L-shaped fixing plate 3 is arranged at the left edge of the support frame 2. A cylinder 4 is arranged at the upper end of the L-shaped fixing plate 3. A rolling assembly 5 is arranged at the front end of the cylinder 4. A filtering assembly 9 is arranged at the lower end of the rolling assembly 5. A feeding hopper 11 is arranged on the support frame 2 around the outer side of the filtering assembly 9. A stirring motor 6 is arranged on the top of the mixing tank 7 on the support frame 2. A stirring paddle 10 is arranged at the bottom end of the stirring motor 6. A slurry discharge pipe 8 is arranged on the lower side of the front end of the mixing tank 7. When in use, first, pour the positive electrode slurry of lithium battery into the feeding hopper 1 1, and after being poured in, it is filtered under the action of the filtering component 9, and the larger block granular raw materials are intercepted at the upper end surface by the filtering component 9, and then the rolling component 5 is pushed back and forth by the output rod of the cylinder 4, so that the rolling component 5 rolls back and forth on the end surface of the filtering component 9, and after rolling, the block granular raw materials can be scattered, and then introduced into the mixing tank 7 by the feeding hopper 11, and then the stirring motor 6 drives the stirring paddle 10 to stir and mix the slurry in the mixing tank 7, and after mixing, the valve switch at the upper end of the slurry discharge pipe 8 is opened to release the slurry for collection, and in this way, the positive electrode slurry of the lithium battery can be filtered and scattered, so that it can be more fully stirred and mixed in the subsequent mixing, thereby helping to improve the quality of the positive electrode slurry of the lithium battery.

[0022] In the present invention, the filter assembly 9 and the feeding hopper 11 are connected and installed by a snap-fitting manner, and the filter assembly 9 is connected to the inner upper end position of the feeding hopper 11. The filter assembly 9 includes a filter mesh 91, a filter steel plate 92, a fixed frame 93 and a connecting groove 94. The inner side of the fixed frame 93 is provided with a filter steel plate 92, and the upper end surface of the filter steel plate 92 is provided with a filter mesh 91. The ends of the fixed frame 93 on both sides are provided with connecting grooves 94. The fixed frame 93 is connected to the feeding hopper 11 through the connecting grooves 94. When installing the filter assembly 9, first, through the fixed frame 93, The connecting grooves 94 at the ends of both sides of the fixed frame 93 are conveniently snapped into the corresponding slots of the feeding hopper 11, and the snap-on connection and installation make it easy to disassemble and assemble, and facilitate subsequent disassembly, cleaning or replacement. When in use, the positive electrode slurry of the lithium battery can be filtered through the filter mesh 91 on the upper end face of the filter steel plate 92, so that the larger block-like particle raw materials are intercepted by the filter mesh 91 at the upper end of the filter steel plate 92. After filtering, it is easier to stir it later and make it more fully and evenly mixed, which is beneficial to improving the quality of the positive electrode slurry of the lithium battery.

[0023] In the present invention, a valve switch is also provided at the upper end of the slurry discharge pipe 8. After the lithium battery positive electrode slurry is mixed, the valve switch at the upper end of the slurry discharge pipe 8 is opened to discharge the slurry for collection.

[0024] Working principle: When in use, first, pour the positive electrode slurry of the lithium battery into the feeding hopper 11, and after pouring, it is filtered under the action of the filtering component 9, and the larger block particle raw materials are intercepted at the upper end face by the filtering component 9, and then the output rod of the cylinder 4 pushes the rolling component 5 back and forth, so that the rolling component 5 rolls back and forth on the end face of the filtering component 9, and after rolling, the block particle raw materials can be scattered, and then introduced into the mixing tank 7 by the feeding hopper 11, and then the stirring motor 6 drives the stirring paddle 10 to stir and mix the slurry in the mixing tank 7, and after mixing, open the valve switch at the upper end of the slurry discharge pipe 8 to release the slurry for collection, and in this way, the positive electrode slurry of the lithium battery can be filtered and scattered, so that it can be more fully stirred and mixed in the subsequent mixing, thereby helping to improve the quality of the positive electrode slurry of the lithium battery.

[0025] Embodiment 2

[0026] Reference Figure 1 , Figure 2 and Figure 4 , a slurry mixing device for lithium battery positive electrode slurry. Compared with the second embodiment, the cylinder 4 and the rolling assembly 5 are connected and installed by means of a sleeve connection, and the rolling assembly 5 is connected to the output rod of the cylinder 4. The rolling assembly 5 includes a connecting sleeve 51, a limiting steel bolt 52, a connecting block 53 and a rolling block 54. A connecting sleeve 51 is arranged on the outer side of the left end of the connecting block 53, a limiting steel bolt 52 is arranged on the upper end of the connecting sleeve 51, and a rolling block 54 is arranged on the bottom end of the connecting block 53. The connecting block 53 is connected to the cylinder 4 through the connecting sleeve 51.

[0027] Working principle: When installing the rolling component 5, first, the connecting sleeve 51 on the outer side of the left end of the connecting block 53 is sleeved on the output rod of the cylinder 4, and further a limiting steel bolt 52 is used to limit and fix it so that it will not loosen during use. When in use, the output rod of the cylinder 4 pushes the connecting block 53 back and forth, so that the rolling block 54 at the bottom end of the connecting block 53 rolls back and forth on the end face of the filter component 9. After rolling, the block-shaped granular raw materials can be scattered, which can avoid waste to the maximum extent on the one hand, and facilitate subsequent stirring and mixing more fully on the other hand.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A slurry mixing device for lithium battery positive electrode slurry, comprising a support frame (2) and a mixing tank (7), characterized in that: The mixing tank (7) is installed and connected to the inner upper end of the support frame (2), and the lower end of the support frame (2) is provided with support legs (1) around, and the left edge of the support frame (2) is provided with an L-shaped fixing plate (3), and the upper end of the L-shaped fixing plate (3) is provided with a cylinder (4), and the front end of the cylinder (4) is provided with a rolling assembly (5), and the lower end of the rolling assembly (5) is provided with a filtering assembly (9), and the outer side of the filtering assembly (9) is provided with a feeding hopper (11) on the support frame (2), and the top of the mixing tank (7) is provided with a stirring motor (6) on the support frame (2), and the bottom end of the stirring motor (6) is provided with a stirring paddle (10), and the lower side of the front end of the mixing tank (7) is provided with a slurry discharge pipe (8).

2. The device for mixing positive electrode slurry for lithium battery according to claim 1, characterized in that: The filter assembly (9) comprises a filter mesh (91), a filter steel plate (92), a fixed frame (93) and a connecting groove (94); the filter steel plate (92) is arranged inside the fixed frame (93); the filter mesh (91) is arranged on the upper end surface of the filter steel plate (92); connecting grooves (94) are arranged at the ends of both sides of the fixed frame (93); and the fixed frame (93) is connected to the feeding hopper (11) via the connecting grooves (94).

3. The slurry mixing device for lithium battery positive electrode slurry according to claim 1, characterized in that: The rolling assembly (5) comprises a connecting sleeve (51), a limiting steel bolt (52), a connecting block (53) and a rolling block (54); a connecting sleeve (51) is arranged on the outer side of the left end of the connecting block (53); a limiting steel bolt (52) is arranged on the upper end of the connecting sleeve (51); a rolling block (54) is arranged on the bottom end of the connecting block (53); and the connecting block (53) is connected to the cylinder (4) via the connecting sleeve (51).

4. The device for mixing positive electrode slurry for lithium battery according to claim 1, characterized in that: The cylinder (4) and the rolling assembly (5) are connected and installed in a sleeve-type manner, and the rolling assembly (5) is connected to the output rod of the cylinder (4).

5. The device for mixing positive electrode slurry for lithium battery according to claim 1, characterized in that: The filter assembly (9) and the feeding hopper (11) are connected and installed by means of a snap-fitting manner, and the filter assembly (9) is connected to the inner upper end position of the feeding hopper (11).

6. The device for mixing positive electrode slurry for lithium battery according to claim 1, characterized in that: The upper end of the slurry discharge pipe (8) is also provided with a valve switch.

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