A lithium battery slurry mixing device with a multi-layered mixing structure

Abstract

This utility model relates to the technical field of lithium battery slurry mixing equipment, specifically disclosing a lithium battery slurry mixing equipment with a multi-layer mixing structure. It includes a screw mixer body, a fixed shell fixedly installed on one side of the outer wall of the screw mixer body, and a premixing tank embedded at the top of the fixed shell. A guide hopper is inserted into the top of the premixing tank, and a stirring mechanism is provided inside the premixing tank. The stirring mechanism includes a stirring motor embedded in one side of the outer wall of the premixing tank. This utility model uses a rotating drum and a filter screen to drive the material to undergo centrifugal motion, and a connecting rod to drive the stirring rod, further stirring the material ejected from the rotating drum. This, combined with the screw stirring of the screw mixer body, achieves multi-layer mixing, dispersing and mixing the materials, ensuring thorough mixing of various materials, guaranteeing the uniformity and stability of the slurry, and thus ensuring the quality of the lithium battery slurry.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium battery slurry mixing equipment, and in particular to a lithium battery slurry mixing equipment with a multi-layer mixing structure. Background Technology

[0002] In lithium battery production, the first step is to mix and stir these components in a specific ratio to create a uniform slurry. Then, the slurry is evenly coated onto current collectors (e.g., aluminum foil for the positive electrode and copper foil for the negative electrode) using a coating process. Subsequent processes such as drying and rolling then form the final lithium battery electrode. The properties of the lithium battery slurry, such as viscosity, solid content, and particle size distribution, have a significant impact on the quality of the electrode and the overall performance of the battery. Therefore, appropriate lithium battery slurry mixing equipment is required for thorough mixing.

[0003] Existing technologies commonly use lithium battery slurry mixing equipment to mix and disperse battery slurry. The equipment consists of a stirring rod and stirring blades. After mixing, the slurry residue remains on the stirring rod and stirring blades, which is difficult to remove.

[0004] An existing patent (publication number: CN211537316U) discloses a lithium battery slurry mixer. In this device, slurry is poured into the mixing chamber, and a motor is driven to rotate via a motor switch. When the motor is working, the motor shaft, stirring rod, and stirring assembly rotate. The motor shaft is inserted into and enclosed by the stirring rod, and the stirring rod and motor shaft can be fixed with waterproof adhesive. The rotating stirring assembly mixes the slurry. The entire stirring assembly mainly consists of stirring blades and an elastic layer. Heat-conducting sheets on the elastic layer conduct heat, resulting in a higher temperature at the stirring assembly, facilitating the evaporation of any subsequently adhering slurry. The stirring blades are elastic hemispherical structures with curved surfaces, allowing for easy movement during the stirring process, making it difficult for the slurry to adhere.

[0005] To address the aforementioned issues, while existing patents can prevent slurry adhesion through the use of components such as stirring rods, in actual use, since the materials are introduced directly into the mixing tank sequentially, some materials may accumulate or be incompletely mixed during the mixing process, resulting in unevenness and affecting the quality of the slurry. Summary of the Invention

[0006] The purpose of this invention is to provide a lithium battery slurry mixing device with a multi-layer mixing structure, which can disperse and stir the materials to ensure that the various materials are fully mixed, thus ensuring the uniformity and stability of the slurry and guaranteeing the quality of the lithium battery slurry, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a lithium battery slurry mixing device with a multi-layer mixing structure, comprising a screw mixer body, a fixed shell fixedly installed on one side of the outer wall of the screw mixer body, and a premixing tank embedded at the top of the fixed shell, wherein a guide hopper is inserted through the top of the premixing tank, and a stirring mechanism is provided inside the premixing tank.

[0008] The stirring mechanism includes a stirring motor, which is embedded in one side of the outer wall of the premixing tank. A drive rod is fixedly installed at the power output end of the stirring motor. A drive gear is fixedly installed at one end of the drive rod, and a driven gear is rotatably connected to the outer wall of the drive gear. A rotating rod extends through the interior of the driven gear.

[0009] Preferably, a rotating cylinder is fixedly installed at the top end of the rotating rod, and a filter screen is embedded in the outer wall of the rotating cylinder.

[0010] Preferably, the inside of the fixed shell is provided with a storage groove, and a guide platform is fixedly installed at the bottom of the storage groove.

[0011] Preferably, a connecting rod is fixedly installed on one side of the driven gear on the outer wall of the rotating rod, and a stirring rod is fixedly installed on the outer wall of the connecting rod.

[0012] Preferably, a retaining ring is fixedly installed on the outer wall of the rotating cylinder, and a support mechanism is provided on the outside of the retaining ring.

[0013] Preferably, the support mechanism includes a sleeve block, which is sleeved on the outside of the retaining ring, and a retaining groove is formed inside the sleeve block corresponding to the position of the retaining ring, and an abutment roller is rotatably connected inside the retaining groove.

[0014] Preferably, a sealing plate is fixedly installed on the outer wall of the sleeve block, and a reinforcing block is fixedly installed on the outer wall of the other sleeve block.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model uses a rotating drum and filter screen to drive the material to centrifugal motion, and in conjunction with the connecting rod to drive the stirring rod, the material thrown out of the rotating drum is stirred again, and in conjunction with the screw of the screw mixing equipment body, the materials are mixed. By setting up a multi-level mixing method, the materials can be dispersed and mixed, so that various materials are fully mixed, ensuring the uniformity and stability of the slurry, thereby ensuring the quality of lithium battery slurry;

[0017] 2. This utility model, through the use of a sleeve block and a reinforcing block, along with a slot and abutting rollers, can rotate and engage the retaining ring of the rotating cylinder, maintaining the stability and smoothness of the rotation process. At the same time, the sealing plate is attached to the rotating cylinder, opening and closing the filter screen during rotation, reducing the space for material to be thrown out, and allowing the materials to be mixed evenly before being dispersed and thrown out, thus preparing for the uniformity of material mixing. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is an overall structural view of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the premix tank of this utility model;

[0021] Figure 3 This is a schematic diagram of the storage slot structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the stirring rod structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the sleeve block structure of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Main body of screw mixer; 2. Fixed shell; 3. Premix tank; 4. Guide hopper; 5. Mixing mechanism; 501. Mixing motor; 502. Drive rod; 503. Drive gear; 504. Driven gear; 505. Rotating rod; 506. Rotating cylinder; 507. Filter screen; 508. Collection trough; 509. Guide platform; 6. Connecting rod; 7. Mixing rod; 8. Snap ring; 9. Support mechanism; 901. Sleeve block; 902. Snap groove; 903. Abutment roller; 904. Reinforcing block; 905. Sealing plate. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] This utility model provides a technical solution:

[0028] Please see Figures 1 to 5 A lithium battery slurry mixing device with a multi-layer mixing structure includes a screw mixer body 1, a fixed shell 2 fixedly installed on one side of the outer wall of the screw mixer body 1, and a premixing tank 3 embedded in the top of the fixed shell 2. A guide hopper 4 is inserted into the top of the premixing tank 3, and a stirring mechanism 5 is provided inside the premixing tank 3. The stirring mechanism 5 includes a stirring motor 501, which is embedded in one side of the outer wall of the premixing tank 3. A drive rod 502 is fixedly installed at the power output end of the stirring motor 501, and one end of the drive rod 502 is fixedly installed with... There is a driving gear 503, and a driven gear 504 is rotatably connected to the outer wall of the driving gear 503. A rotating rod 505 extends through the inside of the driven gear 504. A rotating cylinder 506 is fixedly installed at the top of the rotating rod 505, and a filter screen 507 is embedded in the outer wall of the rotating cylinder 506. A storage groove 508 is opened inside the fixed shell 2, and a guide platform 509 is fixedly installed at the bottom of the storage groove 508. A connecting rod 6 is fixedly installed on one side of the driven gear 504 on the outer wall of the rotating rod 505, and a stirring rod 7 is fixedly installed on the outer wall of the connecting rod 6.

[0029] By adopting the above technical solution, the material is first introduced into the rotating drum 506 inside the premix tank 3 through the guide hopper 4. Then, the stirring motor 501 works, and driven by the drive rod 502, the rotating drum 506 is rotated by the drive gear 503 and the driven gear 504, causing the material to undergo centrifugal motion. The material is then dispersed and mixed through the filter screen 507. In conjunction with the drive rod 502, the connecting rod 6 is driven, and the stirring rod 7 stirs the material thrown out of the rotating drum 506 into the premix tank 3. Finally, the material enters the fixed shell 2 and is guided into the screw mixer body 1 by the guide platform 509 inside the receiving trough 508 for further stirring and mixing. Through multiple stirring and mixing, the overall mixing effect is improved, and the accumulation or uneven mixing is avoided, which would affect the quality of the final product.

[0030] Specifically, such as Figure 2 and Figure 5As shown, a retaining ring 8 is fixedly installed on the outer wall of the rotating cylinder 506, and a support mechanism 9 is provided on the outside of the retaining ring 8. The support mechanism 9 includes a sleeve block 901, which is sleeved on the outside of the retaining ring 8. A retaining groove 902 is opened inside the sleeve block 901 corresponding to the position of the retaining ring 8. An abutment roller 903 is rotatably connected inside the retaining groove 902. A closing plate 905 is fixedly installed on the outer wall of the sleeve block 901, and a reinforcing block 904 is fixedly installed on the outer wall of another sleeve block 901.

[0031] By adopting the above technical solution, the three retaining rings 8 fixed on the outer wall of the rotating cylinder 506 are all fitted with fitting blocks 901. The uppermost fitting block 901 is fixed inside the premix tank 3 by the reinforcing block 904. At the same time, four sealing plates 905 are fixed between every two fitting blocks 901. When the rotating cylinder 506 is not rotating during the material feeding process, the filter screen 507 can be sealed to prevent the material from flowing out directly and failing to achieve the effect of mixing. At the same time, when the rotating cylinder 506 drives the material to make centrifugal motion, the area of ​​the material being thrown out is reduced to avoid excessive penetration and failure to mix evenly. The fitting block 901 is rotatably connected to the abutting roller 903 through the slot 902, which can support the rotating cylinder 506 while rotating and resisting, improving the smoothness and stability of the rotation process.

[0032] Working Principle: The main body 1 of the screw mixer is a twin-screw design, consisting of screws, a drive unit, a conveying channel, and a control system. The material is stirred and mixed by the rotation of the screws, a technology that will not be elaborated further here. Active substances, conductive agents, binders, and solvents are sequentially introduced into the rotating drum 506 inside the premixing tank 3 via the feed hopper 4. First, the material is sealed by a sealing plate 905 and a filter screen 507 to prevent direct material penetration or flow. Then, through the cooperation of the stirring motor 501 and the drive rod 502, the driving gear 503 and the driven gear 504 drive the rotating rod 505 to rotate the rotating drum 506, causing the material to undergo centrifugal motion. The material is dispersed by the filter screen 507 and thrown out for initial mixing. Simultaneously, the rotating rod 505 drives the connecting rod 6, causing the stirring rod 7 to stir and mix the material discharged into the premixing tank 3. The material then enters... The receiving trough 508 of the fixed shell 2, guided by the guide platform 509, flows into the conveying channel of the screw mixer body 1 and is mixed again by the screw, which has the function of multi-layer mixing and improves the mixing effect. Three retaining rings 8 are fixed on the outer wall of the rotating drum 506. The retaining rings 8 are rotatably connected to the retaining grooves 902 of the sleeve block 901. The uppermost sleeve block 901 is fixed inside the premix tank 3 by the reinforcing block 904, which can keep the stability of the sealing plate 905 and block the ejected material, so as to prevent the material from being ejected too fast when the rotating drum 506 and the filter screen 507 rotate, which would result in uneven mixing. The abutting roller 903 connected inside the retaining groove 902 rotates to abut the retaining rings 8, which improves the smoothness of the rotation process. When the mixing is completed and the mixing motor 501 is reset, the sealing plate 905 can seal the filter screen 507 to prevent the material from being directly separated when the guide enters the rotating drum 506 during the next mixing.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lithium battery slurry mixing apparatus having a multi-layer mixing structure, comprising a screw stirring apparatus main body (1), characterized in that: A fixed shell (2) is fixedly installed on one side of the outer wall of the screw mixer body (1), and a premixing tank (3) is embedded at the top of the fixed shell (2). A guide hopper (4) is inserted into the top of the premixing tank (3), and a stirring mechanism (5) is provided inside the premixing tank (3). The stirring mechanism (5) includes a stirring motor (501), which is embedded in one side of the outer wall of the premix tank (3). A drive rod (502) is fixedly installed at the power output end of the stirring motor (501). A drive gear (503) is fixedly installed at one end of the drive rod (502), and a driven gear (504) is rotatably connected to the outer wall of the drive gear (503). A rotating rod (505) extends through the interior of the driven gear (504).

2. The lithium battery slurry mixing device with a multi-layered mixing structure according to claim 1, characterized in that: The top end of the rotating rod (505) is fixedly installed with a rotating cylinder (506), and the outer wall of the rotating cylinder (506) is fitted with a filter screen (507).

3. The lithium battery slurry mixing device with a multi-layered mixing structure according to claim 1, characterized in that: The fixed shell (2) has a storage groove (508) inside, and a guide platform (509) is fixedly installed at the bottom of the storage groove (508).

4. The lithium battery slurry mixing equipment with a multi-layered mixing structure according to claim 1, characterized in that: A connecting rod (6) is fixedly installed on one side of the driven gear (504) on the outer wall of the rotating rod (505), and a stirring rod (7) is fixedly installed on the outer wall of the connecting rod (6).

5. A lithium battery slurry mixing device with a multi-layered mixing structure according to claim 2, characterized in that: The outer wall of the rotating cylinder (506) is fixedly installed with a retaining ring (8), and a support mechanism (9) is provided on the outside of the retaining ring (8).

6. A lithium battery slurry mixing device with a multi-layered mixing structure according to claim 5, characterized in that: The support mechanism (9) includes a sleeve block (901), which is sleeved on the outside of the retaining ring (8), and a retaining groove (902) is provided inside the sleeve block (901) corresponding to the position of the retaining ring (8). An abutment roller (903) is rotatably connected inside the retaining groove (902).

7. A lithium battery slurry mixing device with a multi-layered mixing structure according to claim 6, characterized in that: A sealing plate (905) is fixedly installed on the outer wall of the sleeve block (901), and a reinforcing block (904) is fixedly installed on the outer wall of the other sleeve block (901).

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