A device for manufacturing a high-performance lithium-iron-phosphate electrode material based on nanotechnology

Abstract

The utility model relates to high performance lithium iron phosphate electrode material manufacturing technical field, and disclose a kind of manufacturing device of high performance lithium iron phosphate electrode material based on nanotechnology, including conveying frame, the conveying frame one side is fixedly connected with bearing table, the conveying frame top one side is fixedly connected with support.The utility model integrates mixed cylinder, coating head and roll assembly on the same conveying frame structure, realizes the full-process continuous production from slurry mixing, substrate coating to pole piece roll, mixed cylinder is directly connected with coating head by closed pipeline, avoids slurry settlement and viscosity change caused by traditional transfer storage, and main pressure roller is synchronously driven stirring paddle operation by belt pulley, to ensure that slurry mixing uniformity and coating speed dynamic matching, infrared, hot air composite drying system and roll assembly linkage design, make electrode porosity and compaction density can be accurately coordinated control.

Description

Technical Field

[0001] This utility model relates to the field of high-performance lithium iron phosphate electrode material manufacturing technology, and in particular to a manufacturing device for high-performance lithium iron phosphate electrode materials based on nanotechnology. Background Technology

[0002] High-performance lithium iron phosphate electrode materials are key materials widely used in lithium batteries, especially in electric vehicles and energy storage systems. Their main characteristics are excellent electrochemical performance, high safety and long cycle life. Lithium iron phosphate materials have strong structural stability and can effectively maintain their performance during battery charging and discharging. They also exhibit low thermal runaway risk under overcharge, over-discharge or high temperature environments. Therefore, they have become an ideal battery cathode material, especially in fields that require long-term, high-frequency use.

[0003] Existing high-performance lithium iron phosphate electrode materials still have some problems in the manufacturing process. For example, the preparation of lithium iron phosphate electrodes usually uses segmented independent equipment to complete the mixing, coating, drying and rolling processes. This discrete production method requires the slurry to be transferred, stored and transported after mixing, which can easily lead to the sedimentation of nanoscale active materials and the evaporation of solvents, resulting in fluctuations in the coating surface density. At the same time, there is a lack of process parameter linkage between the coating and rolling processes, making it difficult to achieve precise coordinated control of porosity and compaction density, which directly affects the ion and electron transport efficiency of the electrode. Moreover, the independent operation of each piece of equipment results in a large production line footprint and high energy consumption, which cannot meet the requirements of continuous production for high-performance nanomaterials.

[0004] To address these issues, we provide a fabrication apparatus for high-performance lithium iron phosphate electrode materials based on nanotechnology. Utility Model Content

[0005] The technical problem to be solved by this invention is that the existing technology has the disadvantage that each step of the manufacturing process needs to be completed in segments, which can easily affect the linkage between the steps and cannot meet the requirements of continuous production. To this end, we propose a manufacturing device for high-performance lithium iron phosphate electrode materials based on nanotechnology.

[0006] To achieve the above objectives, this application adopts the following technical solution: a manufacturing apparatus for high-performance lithium iron phosphate electrode materials based on nanotechnology, comprising a conveyor frame, a support platform fixedly connected to one side of the conveyor frame, and a bracket fixedly connected to the top side of the conveyor frame; a coating assembly is provided on the surface of the bracket, the coating assembly comprising a mixing cylinder fixedly connected to the top of the bracket, a stirring paddle movably connected to the inner cavity of the mixing cylinder, a support plate fixedly connected to the inner cavity of the bracket, and a coating head fixedly connected to the bottom of the support plate, the coating assembly being used to coat electrode slurry onto the surface of the electrode substrate; a roller pressing assembly is provided on the top of the support platform, the roller pressing assembly comprising a concave frame fixedly connected to one side of the top of the support platform, a main pressure roller movably connected to the inner cavity of the concave frame, and a secondary pressure roller movably connected to one side of the inner cavity of the support platform, the roller pressing assembly being used to compact the slurry particles.

[0007] Preferably, a right-angle frame is fixedly connected to one side of the concave frame, and a motor is fixedly connected to one side of the right-angle frame. The output end of the motor is fixedly connected to one end of the main pressure roller.

[0008] Preferably, a drive pulley is fixedly connected to one side of the surface of the main pressure roller, and a driven pulley is fixedly connected to one end of the stirring paddle. The drive pulley and the driven pulley are connected by belt drive.

[0009] Preferably, a drive gear is fixedly connected to one end of the main pressure roller, and a driven gear is fixedly connected to one end of the auxiliary pressure roller, with the drive gear meshing with the driven gear.

[0010] Preferably, a drying chamber is fixedly connected to one side of the top of the conveyor frame, an infrared lamp is fixedly connected to one side of the top of the drying chamber, and a hot air drying mechanism is provided on the other side of the top of the drying chamber.

[0011] Preferably, a discharge pipe is connected to one side of the surface of the mixing cylinder, one end of which is connected to the input end of the coating head, and a feed pipe is connected to the other side of the surface of the mixing cylinder. Solenoid valves are installed on the surfaces of both the discharge pipe and the feed pipe.

[0012] Preferably, a groove is provided on one side of the inner cavity of the bearing platform, and the two ends of the auxiliary pressure roller are rotatably connected to the two sides of the inner cavity of the groove via rotating shafts.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. This utility model integrates the mixing cylinder, coating head, and roller pressing assembly onto the same conveyor frame structure, realizing continuous production throughout the entire process from slurry mixing and substrate coating to electrode rolling. The mixing cylinder and coating head are directly connected through a closed pipeline, avoiding slurry sedimentation and viscosity changes caused by traditional transfer and storage. The main pressure roller synchronously drives the stirring paddle through a belt pulley, ensuring dynamic matching between slurry mixing uniformity and coating speed. The linkage design of the infrared and hot air composite drying system and the roller pressing assembly enables precise and coordinated control of electrode porosity and compaction density.

[0015] 2. This utility model effectively solves the coating cracking problem caused by temperature stress in traditional processes by using a two-way compaction structure of main and auxiliary pressure rollers with gear meshing, combined with adjustable temperature infrared lamps and gradient hot air drying. The electromagnetic valve-controlled inlet and outlet pipeline system realizes zero-contact slurry transportation, avoiding solvent evaporation and pollution. The rigid support design of the concave frame and right-angle frame reduces the vibration amplitude during the rolling process and effectively controls the electrode thickness deviation. These technologies fully meet the manufacturing requirements of high energy density power batteries. Attached Figure Description

[0016] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0017] Figure 1 A three-dimensional apparatus for manufacturing high-performance lithium iron phosphate electrode materials based on nanotechnology Figure 1 .

[0018] Figure 2 A three-dimensional apparatus for manufacturing high-performance lithium iron phosphate electrode materials based on nanotechnology Figure 2 .

[0019] Figure 3 This is an exploded view of the surface structure of the support in a manufacturing device for a high-performance lithium iron phosphate electrode material based on nanotechnology.

[0020] Figure 4 This is an exploded view of the internal structure of the drying chamber in a manufacturing apparatus for high-performance lithium iron phosphate electrode materials based on nanotechnology.

[0021] Figure 5 This is a schematic diagram of the surface structure of the support platform in a manufacturing device for high-performance lithium iron phosphate electrode materials based on nanotechnology.

[0022] Legend: 1. Conveyor frame; 2. Support platform; 3. Support bracket; 4. Mixing cylinder; 5. Stirring paddle; 6. Support plate; 7. Coating head; 8. Concave frame; 9. Main pressure roller; 10. Secondary pressure roller; 11. Right-angle frame; 12. Motor; 13. Drive pulley; 14. Driven pulley; 15. Drive gear; 16. Driven gear; 17. Drying oven; 18. Infrared lamp tube; 19. Hot air drying mechanism; 20. Discharge pipe; 21. Feed pipe; 22. Groove. Detailed Implementation

[0023] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0024] Example 1

[0025] Please see Figures 1-5 This invention relates to a manufacturing apparatus for high-performance lithium iron phosphate electrode materials based on nanotechnology. The apparatus includes a conveyor frame 1, with an electrically driven conveyor belt inside to facilitate coating and rolling of the substrate. A support platform 2 is fixedly connected to one side of the conveyor frame 1, supporting the main pressure roller 9 and the auxiliary pressure roller 10, and temporarily storing the rolled substrate. A support 3 is fixedly connected to the top of the conveyor frame 1. A coating assembly is mounted on the surface of the support 3, including a mixing cylinder 4 fixedly connected to the top of the support 3 for mixing the electrode slurry, and a stirring paddle 5 movably connected to the inner cavity of the mixing cylinder 4. The stirring paddle 5 can mix the slurry in the mixing cylinder 4 in real time, ensuring that the slurry does not clump. Furthermore, the coating process is affected by the support plate 6 fixedly connected to the inner cavity of the bracket 3, and the coating head 7 fixedly connected to the bottom of the support plate 6. The coating head 7 is a common slit extrusion coating head 7, which facilitates uniform coating of the substrate. The coating assembly is used to coat the electrode slurry on the surface of the electrode substrate. The top of the support platform 2 is provided with a roller pressing assembly, which includes a concave frame 8 fixedly connected to one side of the top of the support platform 2, a main pressure roller 9 movably connected to the inner cavity of the concave frame 8, and a secondary pressure roller 10 movably connected to one side of the inner cavity of the support platform 2. The relative rotation between the main pressure roller 9 and the secondary pressure roller 10 can uniformly and effectively roll the coated substrate, ensuring the porosity and compaction density of the coated substrate and slurry. The roller pressing assembly is used to compact the slurry particles.

[0026] Example 2

[0027] Please see Figures 1-5Based on Example 1, a right-angle frame 11 is fixedly connected to one side of the concave frame 8. The right-angle frame 11 supports the motor 12. The output end of the motor 12 is fixedly connected to one end of the main pressure roller 9. A drive pulley 13 is fixedly connected to one side of the surface of the main pressure roller 9. A driven pulley 14 is fixedly connected to one end of the stirring paddle 5. The drive pulley 13 and the driven pulley 14 are made of polyurethane-based synchronous belts with an embedded steel wire rope tensile layer, which is resistant to solvent corrosion. There is a tensioning mechanism between the belt and the pulley to ensure normal transmission. The drive pulley 13 and the driven pulley 14 are connected by belt drive. A drive gear 15 is fixedly connected to one end of the main pressure roller 9, and a driven gear 16 is fixedly connected to one end of the auxiliary pressure roller 10. The drive gear 15 and the driven gear 16 mesh. A drying box 17 is fixedly connected to one side of the top of the conveyor frame 1. The bottom of both sides of the drying box 17 has inlets and outlets to facilitate the transfer of the coated substrate to the drying box 17. The drying chamber 17 is equipped with an infrared lamp tube 18 fixedly connected to one side of the top. The infrared lamp tube 18 can match the absorption characteristics of the material, avoiding the energy loss of traditional hot air heating. The other side of the top of the drying chamber 17 is equipped with a hot air drying mechanism 19. The hot air system blows away the solvent vapors volatilized on the surface and at the same time replenishes heat to prevent the electrode from cooling down too quickly and ensure that the deep solvent is completely removed. The hot air drying mechanism 19 is composed of a hot air generator, an air supply system and a waste gas treatment unit, etc., to facilitate the drying of the substrate surface. One side of the surface of the mixing cylinder 4 is connected to the discharge pipe 20. One end of the discharge pipe 20 is connected to the input end of the coating head 7. The other side of the surface of the mixing cylinder 4 is connected to the feed pipe 21. The discharge pipe 20 and the feed pipe 21 can ensure the delivery and addition of slurry. Solenoid valves are installed on the surface of the discharge pipe 20 and the feed pipe 21. A groove 22 is opened on one side of the inner cavity of the support platform 2. The two ends of the auxiliary pressure roller 10 are respectively connected to the two sides of the inner cavity of the groove 22 through a rotating shaft.

[0028] Working principle: First, nano-sized lithium iron phosphate active material, conductive agent, and binder enter the mixing cylinder 4 through the feed pipe 21. Under the high-speed shearing of the stirring paddle 5, a uniform slurry is formed and directly conveyed to the slot extrusion coating head 7 through a closed pipeline. Subsequently, the conveyor belt transports the aluminum foil substrate at a constant speed. The coating head 7 uniformly coats the substrate surface with the slurry to form a wet film of a predetermined thickness, and immediately enters the drying oven 17 for segmented drying. Infrared lamps 18 achieve rapid internal heating by matching the radiation wavelength of the solvent absorption, while the hot air system removes surface volatiles with oblique airflow to ensure the formation of ideal pores. The porous structure with high porosity allows the dried electrode sheets to be conveyed to the rolling zone via a conveyor belt. The main pressure roller 9, driven by motor 12, rotates the auxiliary pressure roller 10 in both directions through gear meshing, completing the electrode sheet compaction under controllable temperature and pressure. At the same time, the rotation speed of the stirring paddle 5 is synchronized with the coating speed through belt drive. Throughout the process, built-in sensors monitor key parameters in real time, and the external control system dynamically adjusts the process parameters of each stage. The final output is an electrode sheet with consistent thickness, ideal porosity, and compaction density, realizing continuous production from slurry preparation to electrode sheet forming, which significantly improves production efficiency and product quality.

[0029] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A device for manufacturing high-performance lithium iron phosphate electrode materials based on nanotechnology, characterized in that, Includes a conveyor frame (1), a support platform (2) is fixedly connected to one side of the conveyor frame (1), and a bracket (3) is fixedly connected to one side of the top of the conveyor frame (1). The support (3) is provided with a coating assembly, which includes a mixing cylinder (4) fixedly connected to the top of the support (3), a stirring paddle (5) movably connected to the inner cavity of the mixing cylinder (4), a support plate (6) fixedly connected to the inner cavity of the support (3), and a coating head (7) fixedly connected to the bottom of the support plate (6). The coating assembly is used to coat the electrode slurry onto the surface of the electrode substrate. The top of the support platform (2) is provided with a roller pressing assembly, which includes a concave frame (8) fixedly connected to one side of the top of the support platform (2), a main pressure roller (9) movably connected to the inner cavity of the concave frame (8), and a secondary pressure roller (10) movably connected to one side of the inner cavity of the support platform (2). The roller pressing assembly is used to compact the slurry particles.

2. The apparatus for manufacturing high-performance lithium iron phosphate electrode materials based on nanotechnology according to claim 1, characterized in that: A right-angle frame (11) is fixedly connected to one side of the concave frame (8), and a motor (12) is fixedly connected to one side of the right-angle frame (11). The output end of the motor (12) is fixedly connected to one end of the main pressure roller (9).

3. The apparatus for manufacturing high-performance lithium iron phosphate electrode materials based on nanotechnology according to claim 1, characterized in that: The main pressure roller (9) is fixedly connected to one side of the surface of the main pressure roller (9), and the driven pulley (14) is fixedly connected to one end of the stirring paddle (5). The main pulley (13) and the driven pulley (14) are connected by belt drive.

4. The apparatus for manufacturing high-performance lithium iron phosphate electrode materials based on nanotechnology according to claim 1, characterized in that: One end of the main pressure roller (9) is fixedly connected to a drive gear (15), and one end of the auxiliary pressure roller (10) is fixedly connected to a driven gear (16). The drive gear (15) meshes with the driven gear (16).

5. The apparatus for manufacturing high-performance lithium iron phosphate electrode materials based on nanotechnology according to claim 1, characterized in that: A drying box (17) is fixedly connected to one side of the top of the conveyor frame (1), an infrared lamp tube (18) is fixedly connected to one side of the top inside the drying box (17), and a hot air drying mechanism (19) is provided on the other side of the top inside the drying box (17).

6. The apparatus for manufacturing high-performance lithium iron phosphate electrode materials based on nanotechnology according to claim 1, characterized in that: The mixing cylinder (4) has a discharge pipe (20) connected to one side of its surface. One end of the discharge pipe (20) is connected to the input end of the coating head (7). The other side of the mixing cylinder (4) has a feed pipe (21) connected to it. Solenoid valves are installed on the surfaces of both the discharge pipe (20) and the feed pipe (21).

7. The apparatus for manufacturing high-performance lithium iron phosphate electrode materials based on nanotechnology according to claim 1, characterized in that: The bearing platform (2) has a groove (22) on one side of its inner cavity, and the two ends of the auxiliary pressure roller (10) are respectively connected to the two sides of the inner cavity of the groove (22) by a rotating shaft.

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