An internal high-efficiency circulating material homogenizing and dispersing device

Abstract

The utility model provides a kind of inner efficient circulation formula material homogenate dispersion device, it is related to battery material dispersion technical field, specifically including shell, the inside of shell is provided with stirring box, is provided with conical cavity on stirring box, conical cavity is rotatably connected with stirring rod and helical stirring blade in its inside, stirring rod and helical stirring blade fixedly connected, stirring rod is inserted into the inside of stirring box and is rotatably connected with it.The application is combined with the structure of conical cavity and helical stirring blade, the narrowing design of conical cavity is used to enhance stirring shear force, and initial agglomerate can be efficiently dispersed, further, the inside diameter of shell is greater than the outside diameter of stirring box to form annular gap, and fixed plate with stirring paddle is arranged in the gap, so that the material shunted to the edge can be stirred again, and the flow path of the material from the center to the edge is formed by the cooperation of the inclined annular guide plate, to improve the stirring effect.

Description

Technical Field

[0001] This utility model relates to the field of battery material dispersion technology, specifically to an internal high-efficiency circulating material homogenization and dispersion device. Background Technology

[0002] In numerous industrial sectors such as chemical engineering, pharmaceuticals, new energy, and food processing, the homogenization and dispersion of materials is a critical production step, and its quality directly determines the performance and quality of the final product. For example, in the preparation of positive and negative electrode materials for lithium batteries, components such as active materials, conductive agents, and binders need to be uniformly dispersed at the nanoscale; otherwise, the energy density and cycle life of the battery will be severely affected. In the biopharmaceutical field, the homogenization and dispersion effect of drug formulations is directly related to the bioavailability and clinical efficacy of the drugs.

[0003] Chinese Patent Publication No. CN213032357U discloses a special dispersion device for lithium battery cathode materials in electric vehicles, including a stirring assembly, an auxiliary heating and filtration assembly, an auxiliary assembly, and a controller. The stirring assembly includes a frame, a feed inlet, a stirring chamber, an electric telescopic rod, a fixing block, a motor, the stirring rod, and a base. The feed inlet is fixedly installed on the top left side of the frame, and the stirring chamber is fixedly installed inside the frame. The feed inlet penetrates the frame, and the stirring chamber is fixedly installed at the bottom of the feed inlet. The electric telescopic rod is fixedly installed on the right side of the inner wall of the frame, and the fixing block is fixedly installed on the top of the inner wall of the frame. This invention improves existing lithium battery cathode material dispersion devices by allowing for timely re-stirring of dispersible materials that do not meet the requirements after stirring, until the stirring requirements are met. This improves the quality of subsequent lithium battery production and enhances overall work efficiency.

[0004] In existing technologies, the use of a dispersion device for lithium battery cathode materials in electric vehicles is only generally described as including "frame, stirring chamber, motor, and stirring rod," without mentioning any structural optimizations for the agglomeration characteristics of cathode materials (such as special cavity shapes, blade designs to enhance shear force, etc.). The stirring method is more inclined towards "conventional mixing" rather than "efficient dispersion" of lithium battery cathode materials, making it difficult to actively solve the problem of material agglomeration and resulting in low dispersion efficiency. Therefore, we have made improvements and proposed an internally efficient circulating material homogenization and dispersion device. Utility Model Content

[0005] The purpose of this invention is to address the problem that current dispersion devices for lithium battery cathode materials used in electric vehicles have simple stirring structures and lack targeted dispersion enhancement designs.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0007] An internally efficient circulating material homogenizing and dispersing device improves the above-mentioned problems by using a combination structure of a conical cavity and a spiral stirring blade, and by forming an annular gap with the inner diameter of the shell larger than the outer diameter of the mixing box, and setting a fixed plate with a stirring paddle in the gap.

[0008] The application is as follows:

[0009] An internally efficient circulating material homogenizing and dispersing device includes a shell, inside which is a mixing tank. A conical cavity is formed in the mixing tank. A stirring rod and a spiral stirring blade are rotatably connected inside the conical cavity. The stirring rod and spiral stirring blade are fixedly connected. The stirring rod is inserted into and rotatably connected to the mixing tank. A spiral guide groove is formed on the inner wall of the mixing tank, outside the conical cavity. An inclined annular guide plate is fixedly installed on the top of the mixing tank, at the top of the conical cavity. Fixing plates are provided on opposite sides of the mixing tank inside the shell. Several stirring paddles are fixedly installed on both sides of the two fixing plates, and the stirring paddles are slidably connected to the inner wall of the shell.

[0010] As a preferred technical solution of this application, a filter plate is provided inside the shell, and the filter plate is inserted into the shell and slidably connected thereto. Both of the fixed plates pass through the filter plate and are fixedly connected thereto. The mixing tank is inserted into the filter plate and slidably connected thereto.

[0011] As a preferred technical solution of this application, a scraper is slidably connected to the bottom of the inner wall of the housing, and both fixing plates are fixedly installed on the top of the scraper.

[0012] As a preferred technical solution of this application, a second servo motor is fixedly installed inside the housing, and a connecting rod is fixedly installed at the output end of the second servo motor. The connecting rod passes through the top of the housing and is rotatably connected to it. The connecting rod is fixedly connected to the scraper.

[0013] As a preferred technical solution of this application, a first servo motor is fixedly installed inside the mixing tank, and an elastic coupling is fixedly installed at the output end of the first servo motor. A planetary gear reducer is provided inside the mixing tank and on the side of the mixing rod near the elastic coupling. The planetary gear reducer is fixedly connected to the bottom of the mixing rod and the output end of the elastic coupling.

[0014] As a preferred technical solution of this application, trapezoidal blocks are fixedly installed on both sides of the mixing tank. The inclined annular guide plate is inserted into the interior of the two trapezoidal blocks and fixedly connected to them. The two trapezoidal blocks are inserted into the interior of the shell and slidably connected to it. The top of the two trapezoidal blocks is provided with fixing screws. The two fixing screws are inserted into the interior of the shell and threadedly connected to it. The two fixing screws pass through the two trapezoidal blocks respectively and are threadedly connected to them.

[0015] As a preferred technical solution of this application, a spiral heating tube is fixedly installed inside the shell, a feeding pipe is fixedly installed on one side of the shell, a feeding groove that cooperates with the feeding pipe is opened on the shell, and a control valve is fixedly installed on the outside of the shell and on the feeding pipe.

[0016] As a preferred technical solution of this application, a torque sensor and a pressure sensor are embedded in one side of the inner wall of the shell and the mixing tank, and a controller is embedded in one side of the shell. The controller is electrically connected to the first servo motor, the second servo motor, the control valve, the torque sensor and the pressure sensor.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] In the scheme of this application:

[0019] (1) By combining the conical cavity and the spiral stirring blades, the narrowing design of the conical cavity enhances the stirring shear force, which can efficiently break up the initial agglomerates. Furthermore, the inner diameter of the shell is larger than the outer diameter of the mixing box to form an annular gap, and a fixed plate with stirring paddle is set in the gap so that the material diverted to the edge can be stirred a second time. In addition, the inclined annular guide plate guides the material to form a flow path from the center to the edge, thereby improving the stirring effect.

[0020] (2) The filter plate intercepts incompletely dispersed agglomerates and small impurities (such as metal shavings) to avoid uneven pores of the electrode sheet caused by large agglomerates. At the same time, the scraper slides along the inner wall of the shell to scrape up the battery material deposited at the bottom and re-stir to avoid component segregation. It also removes the sticky slurry remaining on the inner wall, thereby improving the material utilization rate. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a side sectional view of the present invention.

[0023] Figure 3 This is a partial structural diagram of the present invention;

[0024] Figure 4This is a front sectional view of the present invention.

[0025] Figure 5 This utility model Figure 4 Enlarged view of point A in the middle;

[0026] Figure 6 This is a top view cross-sectional structural diagram of the present invention.

[0027] Explanation of reference numerals in the accompanying drawings: 1. Shell; 2. Mixing tank; 3. Conical cavity; 4. Spiral guide groove; 5. Stirring rod; 6. Spiral stirring blade; 7. Inclined annular guide plate; 8. First servo motor; 9. Flexible coupling; 10. Planetary gear reducer; 11. Second servo motor; 12. Connecting rod; 13. Scraper; 14. Filter plate; 15. Fixing plate; 16. Stirring paddle; 17. Spiral heating tube; 18. Trapezoidal block; 19. Fixing screw; 20. Controller. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings.

[0029] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] 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.

[0034] Example 1: Please refer to the appendix of the instruction manual. Figure 1-3 A high-efficiency circulating material homogenizing and dispersing device includes a shell 1, a mixing tank 2 inside the shell 1, a conical cavity 3 on the mixing tank 2, a stirring rod 5 and a spiral stirring blade 6 rotatably connected inside the conical cavity 3, the stirring rod 5 and the spiral stirring blade 6 are fixedly connected, the stirring rod 5 is inserted into the mixing tank 2 and rotatably connected thereto, a spiral guide groove 4 is provided on the inner wall of the mixing tank 2 and on the outer side of the conical cavity 3, an inclined annular guide plate 7 is fixedly installed on the top of the mixing tank 2 and on the top of the conical cavity 3, the inner diameter of the shell 1 is larger than the outer diameter of the mixing tank 2, a fixing plate 15 is provided inside the shell 1 and on the corresponding sides of the mixing tank 2, a plurality of stirring paddles 16 are fixedly installed on both sides of the two fixing plates 15, and the stirring paddles 16 are slidably connected to the inner wall of the shell 1.

[0035] In this embodiment of the invention, the battery material (taking the positive electrode slurry as an example, which contains a mixture of multiple components such as positive electrode active material, conductive agent, binder, and solvent) is first put into the conical cavity 3 of the mixing tank 2 after being put into the device. The stirring rod 5 drives the spiral stirring blade 6 to rotate at high speed. The narrowing structure of the conical cavity 3 enhances the shear force on the battery material, quickly breaking up the initial agglomerates of active material (such as ternary material, lithium iron phosphate) and conductive agent (such as carbon black, graphene), and achieving preliminary mixing. At the same time, the spiral lift of the spiral stirring blade 6 pushes the initially dispersed battery material to the inclined annular guide plate 7 at the top of the mixing tank 2. The guide plate guides the material to flow outward through the inclined angle and enters the annular gap between the shell 1 and the mixing tank 2 (formed because the inner diameter of the shell 1 is larger than the outer diameter of the mixing tank 2). At this time, the fixed plate 15 in the annular gap drives the stirring paddle 16 to rotate, and performs secondary stirring on the battery material diverted here, further eliminating the local aggregation of conductive agent and active material, ensuring that the binder is evenly dispersed in the solvent, and avoiding the problems of "material shortage" and "uneven thickness" during electrode sheet preparation.

[0036] In this embodiment of the invention, considering the multi-component and easily agglomerated characteristics of battery materials, the combination of "conical cavity 3 + spiral stirring blade" enhances shear force, which can control the particle size of positive electrode active material agglomerates and improve the uniformity of conductive agent dispersion, laying the foundation for high-rate discharge performance of the battery. The inclined annular guide plate 7 guides the material to form a flow path of "center stirring → edge secondary dispersion", avoiding component segregation caused by gravity settling of high-density active materials (such as ternary materials) in the battery material. The fixed plate 15 and the stirring paddle 16 cover the annular gap between the shell 1 and the stirring box 2, filling the "edge stirring blind zone" of the traditional device, solving the problem of adhesive agglomeration caused by insufficient stirring of battery materials at the edge of the device, and reducing the defect rate during electrode sheet preparation.

[0037] Example 2: Please refer to the appendix of the instruction manual. Figure 1-6 In a preferred embodiment of the present invention, a filter plate 14 is provided inside the housing 1, and the filter plate 14 is inserted into the housing 1 and slidably connected thereto. Two fixing plates 15 pass through the filter plate 14 and are fixedly connected thereto. The mixing tank 2 is inserted into the filter plate 14 and slidably connected thereto.

[0038] A scraper 13 is slidably connected to the bottom of the inner wall of the housing 1, and two fixing plates 15 are fixedly installed on the top of the scraper 13.

[0039] A second servo motor 11 is fixedly installed inside the housing 1. A connecting rod 12 is fixedly installed at the output end of the second servo motor 11. The connecting rod 12 passes through the top of the housing 1 and is rotatably connected to it. The connecting rod 12 is fixedly connected to the scraper 13.

[0040] A first servo motor 8 is fixedly installed inside the mixing tank 2. A flexible coupling 9 is fixedly installed at the output end of the first servo motor 8. A planetary gear reducer 10 is provided inside the mixing tank 2 and on the side of the mixing rod 5 near the flexible coupling 9. The planetary gear reducer 10 is fixedly connected to the bottom of the mixing rod 5 and the output end of the flexible coupling 9.

[0041] Trapezoidal blocks 18 are fixedly installed on both sides of the mixing tank 2. Inclined annular guide plates 7 are inserted into the interior of the two trapezoidal blocks 18 and fixedly connected to them. The two trapezoidal blocks 18 are inserted into the interior of the shell 1 and slidably connected to it. The top of the two trapezoidal blocks 18 is provided with fixing screws 19. The two fixing screws 19 are inserted into the interior of the shell 1 and threadedly connected to it. The two fixing screws 19 pass through the two trapezoidal blocks 18 respectively and are threadedly connected to them.

[0042] A spiral heating tube 17 is fixedly installed inside the housing 1. A feeding pipe is fixedly installed on one side of the housing 1. A feeding groove that cooperates with the feeding pipe is opened on the housing 1. A control valve is fixedly installed on the outside of the housing 1 and on the feeding pipe.

[0043] Torque sensors and pressure sensors are embedded on one side of the inner wall of both the shell 1 and the mixing tank 2. A controller 20 is embedded on one side of the shell 1. The controller 20 is electrically connected to the first servo motor 8, the second servo motor 11, the control valve, the torque sensor, and the pressure sensor.

[0044] In this embodiment of the invention, during the process of the battery material completing "central stirring → edge secondary dispersion", when the material flows downward from the annular gap, it will first pass through the filter plate 14. The filter plate 14 can intercept the incompletely dispersed active material agglomerates, conductive agent clumps and possible tiny impurities in the battery material. At the same time, the fixing plate 15 drives the filter plate 14 to rotate synchronously, and the centrifugal force is used to make the battery material pass through the filter screen quickly, so as to avoid the filter screen being blocked by the viscous battery slurry and ensure that the filtration is continuously effective.

[0045] When the fixed plate 15 rotates, it drives the scraper 13 at the bottom to slide synchronously along the bottom of the inner wall of the housing 1. In view of the characteristic that the active material with a high density in the battery material is easy to deposit, the scraper 13 will scrape up the battery material deposited at the bottom of the housing 1 when it slides, and bring it back into the annular gap to participate in secondary stirring; at the same time, the scraper 13 is in close contact with the inner wall of the housing 1, which can remove the sticky battery slurry residue attached to the bottom and prevent the residue material from solidifying after being left for a long time.

[0046] To address the viscosity differences of different types of battery materials, after the device is started, the controller 20 controls the second servo motor 11 to run according to a preset program. The output torque of the second servo motor 11 is transmitted to the scraper 13 through the connecting rod 12, causing the scraper 13 to rotate along the bottom of the inner wall of the housing 1, synchronously driving the fixed plate 15, the stirring paddle 16, and the filter plate 14 to rotate. The second servo motor 11 supports precise speed adjustment. For high-viscosity negative electrode slurry, a low speed and high torque output are used to avoid damage to the stirring paddle 16 due to excessive resistance. For low-viscosity positive electrode slurry, a high speed is used to improve dispersion efficiency.

[0047] To address the need for high shear force to break up agglomerates of active materials in battery materials, the high-speed power output of the first servo motor 8 is transmitted to the planetary gear reducer 10 via the flexible coupling 9 after startup. The reducer converts high speed and low torque into low speed and high torque, driving the stirring rod 5 and the spiral stirring blades 6 to rotate, ensuring sufficient shear force against the agglomerates of battery materials. The flexible coupling 9 can buffer the vibration during motor startup, preventing torque fluctuations from causing excessive instantaneous force on the stirring rod 5 and preventing the introduction of metallic impurities into the battery materials.

[0048] In this embodiment of the utility model, in response to the need for regular cleaning of the mixing tank 2 during the battery material production process, the mixing tank 2 is placed inside the housing 1 during device assembly. The trapezoidal block 18 is engaged with the sliding groove of the housing 1 to achieve initial positioning. Then, the trapezoidal block 18 is locked to the housing 1 by the fixing screw 19 to complete the fixing of the mixing tank 2. When cleaning is required, simply loosen the fixing screw 19 to pull out the mixing tank 2 along the sliding groove, which is convenient to operate.

[0049] In response to the characteristic that the viscosity of battery materials increases significantly at low temperatures, the spiral heating tube 17 can adjust the heating temperature according to the type of battery material during the operation of the device. After the battery material is homogenized and dispersed, the controller 20 controls the control valve on the feeding pipe to open, and the dispersed slurry is directly transported to the subsequent electrode coating process through the feeding trough and feeding pipe.

[0050] To address the critical impact of battery material dispersion quality on battery performance, during device operation, a torque sensor monitors the torque of the stirring rod 5 in real time, while a pressure sensor monitors the slurry pressure inside the housing 1. Sensor signals are transmitted to the controller 20. If the torque is too high (e.g., active material agglomerates in the positive electrode slurry are not dispersed), the controller automatically reduces the speed of the first servo motor 8 and increases the torque to enhance shear force. If the torque is too low (e.g., excessive slurry dispersion may damage the conductive agent structure), the stirring intensity is reduced. If the pressure is abnormal (e.g., the liquid level is too low), the controller 20 prompts for material replenishment. If a sudden increase in torque is detected (possibly due to filter blockage), the motor operation is immediately stopped and an alarm is triggered to prevent equipment damage. After dispersion is complete, the controller 20 automatically shuts off the motor and opens the control valve to transport the slurry to the coating process.

[0051] Example 3: Please refer to the appendix of the instruction manual. Figure 2 and Figure 3 In a preferred embodiment of this utility model, a U-shaped tube is provided on one side of the housing 1, and the U-shaped tube is inserted into the interior of the housing 1 and fixedly connected thereto. A negative pressure pump and a booster pump are provided inside the housing 1 and outside the U-shaped tube. An annular tube is fixedly installed inside the housing 1, and the U-shaped tube is fixedly connected to the annular tube. An input groove that mates with the U-shaped tube is opened on the annular tube. A plurality of nozzles are provided inside the housing 1 and on one side of the U-shaped tube. The plurality of nozzles pass through one side of the housing 1 and are fixedly connected thereto. The plurality of nozzles are fixedly connected to the annular tube. A plurality of output grooves that mate with the nozzles are opened on the annular tube. The controller 20 is electrically connected to the negative pressure pump and the booster pump.

[0052] In this embodiment of the utility model, after the negative pressure pump inside the shell 1 is started, a negative pressure field is formed by connecting with the U-shaped tube. The U-shaped tube serves as the main channel for material extraction, with both ends extending into the annular cavity formed by the shell 1 and the mixing tank 2 (i.e., the "external circulation area" of the device), and the openings facing the direction of material flow within the cavity.

[0053] The negative pressure suction generated by the negative pressure pump can efficiently collect all materials in the annular cavity, including materials thrown towards the inner wall of the shell 1 by the centrifugal force of stirring, materials suspended after being stirred by the stirring paddle 16, and fine particles settled on the edge of the filter plate 14.

[0054] The material extracted through the U-tube first enters the booster pump inside the device. The booster pump automatically adjusts the output pressure according to the torque sensor and pressure sensor signals received by the controller 20. For high-hardness particles in battery materials (such as lithium iron phosphate cathode material and graphite anode material), the material pressure can be increased to form a material flow with high kinetic energy.

[0055] All nozzles are tilted toward the center of gravity of the device cavity (i.e., the central axis of the mixing tank 2 and the conical cavity 3), and the spray angles of adjacent nozzles are symmetrically distributed, forming a "multi-directional impact" spray pattern. Since the material flow sprayed from the nozzles in all directions has the same pressure and kinetic energy (based on the uniform distribution of the annular tube), an instantaneous impact force is generated when they converge. This impact force can directly act on the stubborn agglomerates in the material (especially for high-hardness particle agglomerates formed by van der Waals forces and electrostatic forces in battery materials), breaking the binding force inside the agglomerates and dispersing them into individual particles or small-sized agglomerate units. After the material flow impacts, the kinetic energy is converted into circumferential motion energy, forming a high-speed rotating vortex in the central region of the cavity. This vortex, together with the internal circulation flow generated by the spiral stirring blades 6 inside the mixing tank 2 and the external circulation flow generated by the stirring paddle 16, forms a "three-flow superposition". This not only further agitates the dispersed particles, but also allows the materials in different regions (such as fine particles in the central region and coarse particles in the edge region) to be fully mixed, eliminating the concentration difference of the material components.

[0056] After impact and vortex action, the material will be reintegrated into the annular cavity of the shell 1 and the mixing tank 2, and will be drawn out again by the U-shaped tube, pressurized by the booster pump, and sprayed by the nozzle, entering the next round of "extraction-pressurization-countercurrent" cycle. The entire system is linked with the sensor through the controller 20, and can automatically adjust the extraction rate of the negative pressure pump, the pressure of the booster pump, and the spraying frequency according to the degree of material dispersion (by detecting the stirring resistance by the torque sensor and the viscosity of the material by the pressure sensor) until the material reaches a uniform dispersion state.

[0057] In this embodiment of the invention, high-hardness particles in battery materials (such as lithium iron phosphate and ternary materials) are prone to forming dense agglomerates during drying and transportation. Traditional stirring devices can hardly break their internal structure by using only the shear force of the blades, resulting in "large particle dead zones" in the slurry, which affects the charge and discharge performance and cycle life of the battery.

[0058] The instantaneous impact force generated by the "high-pressure counter-impact" has an energy density far exceeding that of the shear force of traditional stirring blades. This force can directly tear the chemical bonds and physical bonds of high-hardness agglomerates, thereby increasing the dispersion rate of the agglomerates. At the same time, the eddy current effect after the impact can prevent the dispersed small particles from re-agglomerating, ensuring a uniform particle size distribution in the slurry and meeting the high-precision requirements of battery electrode coating.

[0059] In conventional homogenization and dispersion devices, the "internal circulation flow" inside the mixing tank 2 is independent of the "external circulation flow" between the shell 1 and the mixing tank 2. The exchange of materials between the two areas relies on slow diffusion, which easily leads to the problem of "polarization" where the material in the internal circulation area is over-mixed and the material in the external circulation area is under-dispersed. This device breaks down the barrier between the internal and external circulation through an "extraction-spraying" system. The material in the external circulation area is extracted through a U-shaped tube, and after being pressurized, it is sprayed into the core area of ​​the internal circulation (the center of the cavity). This allows the "material to be dispersed" in the external circulation and the "dispersed material" in the internal circulation to be directly mixed in the central area. At the same time, the eddy current pushes the mixed material back to the external circulation area, forming a "internal and external circulation linkage" full-domain mixing mode. This improves the mixing uniformity of each component (such as active material, binder, and solvent) in the homogenate and avoids local impedance differences in the battery electrode caused by uneven mixing.

[0060] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. A high-efficiency internal circulation material homogenizing and dispersing device, comprising a shell (1), characterized in that, The shell (1) is equipped with a mixing tank (2), and a conical cavity (3) is provided on the mixing tank (2). A stirring rod (5) and a spiral stirring blade (6) are rotatably connected inside the conical cavity (3). The stirring rod (5) and the spiral stirring blade (6) are fixedly connected. The stirring rod (5) is inserted into the mixing tank (2) and rotatably connected to it. A spiral guide groove (4) is provided on the inner wall of the mixing tank (2) and on the outer side of the conical cavity (3). An inclined annular guide plate (7) is fixedly installed on the top of the mixing tank (2) and on the top of the conical cavity (3). A fixing plate (15) is provided on both sides of the shell (1) and on both sides of the two fixing plates (15). Several stirring paddles (16) are fixedly installed on both sides of the two fixing plates (15), and the stirring paddles (16) are slidably connected to the inner wall of the shell (1).

2. The internal high-efficiency circulating material homogenizing and dispersing device according to claim 1, characterized in that, The housing (1) is provided with a filter plate (14) inside, and the filter plate (14) is inserted into the housing (1) and slidably connected thereto. The two fixing plates (15) pass through the filter plate (14) and are fixedly connected thereto. The mixing tank (2) is inserted into the filter plate (14) and slidably connected thereto.

3. The internal high-efficiency circulating material homogenizing and dispersing device according to claim 1, characterized in that, A scraper (13) is slidably connected to the bottom of the inner wall of the housing (1), and two fixing plates (15) are fixedly installed on the top of the scraper (13).

4. The internal high-efficiency circulating material homogenizing and dispersing device according to claim 3, characterized in that, A second servo motor (11) is fixedly installed inside the housing (1). A connecting rod (12) is fixedly installed at the output end of the second servo motor (11). The connecting rod (12) passes through the top of the housing (1) and is rotatably connected to it. The connecting rod (12) is fixedly connected to the scraper (13).

5. The internal high-efficiency circulating material homogenizing and dispersing device according to claim 1, characterized in that, A first servo motor (8) is fixedly installed inside the mixing tank (2). An elastic coupling (9) is fixedly installed at the output end of the first servo motor (8). A planetary gear reducer (10) is provided inside the mixing tank (2) and on the side of the stirring rod (5) near the elastic coupling (9). The planetary gear reducer (10) is fixedly connected to the bottom of the stirring rod (5) and the output end of the elastic coupling (9).

6. The internal high-efficiency circulating material homogenizing and dispersing device according to claim 1, characterized in that, Trapezoidal blocks (18) are fixedly installed on both sides of the mixing tank (2). The inclined annular guide plate (7) is inserted into the interior of the two trapezoidal blocks (18) and fixedly connected to them. The two trapezoidal blocks (18) are inserted into the interior of the shell (1) and slidably connected to it. The top of the two trapezoidal blocks (18) is provided with a fixing screw (19). The two fixing screws (19) are inserted into the interior of the shell (1) and threadedly connected to it. The two fixing screws (19) pass through the two trapezoidal blocks (18) respectively and are threadedly connected to them.

7. The internal high-efficiency circulating material homogenizing and dispersing device according to claim 1, characterized in that, A spiral heating tube (17) is fixedly installed inside the housing (1). A feeding pipe is fixedly installed on one side of the housing (1). A feeding groove that cooperates with the feeding pipe is opened on the housing (1). A control valve is fixedly installed on the outside of the housing (1) and on the feeding pipe.

8. The internal high-efficiency circulating material homogenizing and dispersing device according to claim 1, characterized in that, Torque sensors and pressure sensors are embedded on one side of the inner wall of the housing (1) and the mixing tank (2). A controller (20) is embedded on one side of the housing (1). The controller (20) is electrically connected to the first servo motor (8), the second servo motor (11), the control valve, the torque sensor, and the pressure sensor.

Images