A dryer for lithium-ion battery anode material precursors and its drying process

Abstract

This invention discloses a lithium-ion battery anode material precursor dryer and its drying process, including a lower positioning frame, an upper flipping frame, an external annular chamber, an internal annular chamber, an airflow conveying mechanism, a lower exhaust pipe, a filter element, and a vibrating support assembly. When drying the lithium-ion battery anode material precursor, the invention uses a vibrating support assembly installed within the annular cavity to support the precursor. This vibrating support assembly disperses and vibrates the precursor, allowing hot airflow to fully penetrate it, thus improving the drying efficiency. Furthermore, the vibration method facilitates the separation of fine impurities from the precursor during the drying process, avoiding the tedious process of later separation after adhesion.

Description

Technical Field

[0001] This invention relates to a dryer for lithium battery anode material precursors and its drying process. Background Technology

[0002] Currently, lithium batteries are being used more and more widely, and the demand for their use in industry is increasing. In the existing technology, precursor raw materials are required for the preparation of lithium battery anodes. Precursor raw materials usually need to be dried during processing. The existing drying process generally involves stacking or spreading the lithium battery anode material precursor in a heating chamber, and then drying it by introducing hot air into the heating chamber, or by drying it through heating tubes. However, this drying method generally takes a long time, the drying is relatively uneven, and some fine impurities will directly adhere to the lithium battery anode material precursor during drying, making it difficult to purify it later. Summary of the Invention

[0003] To address the shortcomings of the existing technology, the present invention provides a uniform and efficient drying machine for lithium battery anode material precursors and its drying process.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0005] A lithium-ion battery anode material precursor dryer includes a lower positioning frame, an upper tilting frame, an outer annular chamber, an inner annular chamber, an airflow conveying mechanism, a lower exhaust pipe, a filter element, and a vibrating support assembly. The upper tilting frame is tilted and mounted above the lower positioning frame. The outer annular chamber is mounted inside the lower positioning frame. The inner annular chamber is mounted around the inner perimeter of the outer annular chamber. Annular cavities are provided on the outer perimeter of the inner annular chamber and the inner perimeter of the outer annular chamber. The vibrating support assembly is installed within the annular cavities. The filter element is installed within the lower exhaust pipe, which is mounted at the lower end of the outer annular chamber and communicates with the annular cavity. The airflow conveying mechanism is mounted inside the upper tilting frame. The airflow conveying mechanism includes an internal docking ring, an external docking ring, a movable cover, an air intake heating box, vent pipes, and jet nozzles. The external docking ring is fixedly installed around the inner perimeter of the upper tilting frame, and the internal docking ring is installed around the inner perimeter of the external docking ring, forming a closed annular cavity between the external and internal docking rings. A movable cover is installed at the upper end of both the internal and external docking rings. An air intake heating box is installed in the middle of the upper end of the movable cover, and multiple vent pipes are connected around the air intake heating box. The outer ends of the multiple vent pipes pass through the movable cover and extend into the closed annular cavity, and the outer ends of the vent pipes are connected to jet nozzles. An air intake pipe and an induced draft fan are provided at the upper end of the air intake heating box.

[0006] Furthermore, the vibratory bearing assembly includes a support ring, support springs, a vibrator, and an annular dense mesh; support rings are installed around the inner and outer sides of the annular cavity, and multiple support springs are evenly installed around the upper end of the support rings, with an annular dense mesh installed on the upper side of the multiple support springs; multiple vibrators are installed on the lower side of the annular dense mesh.

[0007] Furthermore, the inner ends and outer ends of both sides of the annular dense mesh are provided with longitudinal limiting teeth; the annular cavity is provided with a longitudinal limiting groove; the longitudinal limiting teeth are floating and engaging with the longitudinal limiting groove.

[0008] Furthermore, the airflow conveying mechanism also includes a rotary motor and a positioning plate; the upper ends of the built-in docking ring and the external docking ring are rotatably mounted on the movable cover; a positioning plate is installed in the middle of the built-in docking ring, the upper side of the positioning plate is connected to the rotary motor, and the upper end of the rotary motor is rotatably connected to the lower center of the movable cover through a power shaft.

[0009] Furthermore, both the inner and outer docking rings have annular grooves at their upper ends; the lower end of the movable cover has positioning rings on its inner and outer sides; the positioning rings are rotatably engaged with the annular grooves.

[0010] Furthermore, the lower outer sides of the built-in ring compartment and the lower inner sides of the external ring compartment are fixedly connected by horizontal columns.

[0011] Furthermore, a rotating column is provided on one side of the upper flip frame; a connecting slot is provided on one side of the lower positioning frame, and a positioning pin is provided on the connecting slot; the outer end of the rotating column is rotatably mounted on the positioning pin.

[0012] Furthermore, the lower end of the exhaust pipe is provided with an internal threaded annular surface; the lower end of the filter element is provided with an external threaded cylinder around its perimeter; the external threaded cylinder is threadedly screwed onto the internal threaded annular surface.

[0013] A drying process for a lithium-ion battery anode material precursor dryer includes the following steps: The lithium-ion battery anode material precursor is injected into an annular cavity. A vibratory bearing assembly is activated, causing the lithium-ion battery anode material precursor to vibrate continuously. Then, the upper rotating frame is rotated onto the lower positioning frame, so that the outer docking ring covers the upper periphery of the outer ring chamber, and the inner docking ring covers the upper periphery of the inner ring chamber. A rotary motor is activated, driving the movable cover, vent pipe, and jet nozzles to rotate continuously. Finally, hot air is input through the intake heating box. The hot air is then sprayed downwards through multiple rotating jet nozzles onto the lithium-ion battery anode material precursor within the annular cavity. Finally, the airflow is discharged from the lower exhaust pipe and filtered through a filter element.

[0014] The beneficial effects of this invention are as follows:

[0015] In the drying process of lithium-ion battery anode material precursor, this invention uses a vibrating support component installed in an annular cavity to support the precursor. The vibrating support component disperses the vibration of the precursor, allowing hot airflow to fully penetrate it, thus improving the drying efficiency. Furthermore, the vibration method facilitates the separation of fine impurities from the precursor during the drying process, avoiding the tedious process of separation after adhesion.

[0016] This invention uses a rotary motor to drive the movable cover to rotate, which in turn drives multiple air pipes and multiple air jets to rotate, thus ensuring uniform airflow around the annular cavity and improving drying efficiency and uniformity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the flipping frame after it has been flipped.

[0019] Figure 3 For the present invention Figure 1 A schematic diagram of the upper structure.

[0020] Figure 4 For the present invention Figure 1 A schematic diagram of the lower part of the structure.

[0021] Figure 5 For the present invention Figure 4 A partially enlarged structural diagram.

[0022] Figure 6 This is a schematic diagram of the connection structure between the rotating column and the lower positioning frame of the present invention. Detailed Implementation

[0023] The invention will now be described in further detail with reference to the accompanying drawings.

[0024] like Figures 1 to 6As shown, a lithium-ion battery anode material precursor dryer includes a lower positioning frame 1, an upper flipping frame 2, an outer annular chamber 3, an inner annular chamber 4, an airflow conveying mechanism 5, a lower exhaust pipe 6, a filter element 7, and a vibrating support assembly 8. The upper flipping frame 2 is flipped and installed above the lower positioning frame 1. The outer annular chamber 3 is installed inside the lower positioning frame 1. The inner annular chamber 4 is installed around the inner periphery of the outer annular chamber 4. Annular cavities 31 are provided on the outer periphery of the inner annular chamber 4 and the inner periphery of the outer annular chamber 3. The vibrating support assembly 8 is installed inside the annular cavity 31. The filter element 7 is installed inside the lower exhaust pipe 6, which is installed at the lower end of the outer annular chamber 3 and communicates with the annular cavity 31. The airflow conveying mechanism 5 is installed inside the upper flipping frame 2. The airflow conveying mechanism 5 includes an internal docking mechanism. The system comprises a ring 51, an external docking ring 52, a movable cover 53, an air intake heating box 54, a vent pipe 55, and a jet nozzle 56. The external docking ring 52 is fixedly installed around the inner perimeter of the upper flip frame 2, and the internal docking ring 51 is installed around the inner perimeter of the external docking ring 52, forming a closed annular cavity 521 between the external docking ring 52 and the internal docking ring 51. A movable cover 53 is installed on the upper end of the internal docking ring 51 and the external docking ring 52. The air intake heating box 54 is installed in the middle of the upper end of the movable cover 53. Multiple vent pipes 55 are connected around the air intake heating box 54. The outer ends of the multiple vent pipes 55 pass through the movable cover 53 and extend into the closed annular cavity 521. The outer ends of the vent pipes 55 are connected to the jet nozzles 56. An air inlet pipe 541 and an induced draft fan 542 are provided on the upper end of the air intake heating box 54.

[0025] like Figures 1 to 6 As shown, to facilitate vibration of the lithium battery anode material precursor, the vibration-type bearing assembly 8 further includes a support ring 81, support springs 82, a vibrator 83, and an annular dense mesh 84. Support rings 81 are installed around the inner and outer sides of the annular cavity 31. Multiple support springs 82 are evenly installed around the upper edge of the support rings 81, and an annular dense mesh 84 is installed on the upper side of the multiple support springs 82. Multiple vibrators 83 are installed on the lower side of the annular dense mesh 84. Furthermore, longitudinal limiting teeth 841 are provided at both the inner and outer ends of the annular dense mesh 84. A longitudinal limiting groove 311 is provided inside the annular cavity 31. The longitudinal limiting teeth 841 float and engage with the longitudinal limiting groove 311.

[0026] like Figures 1 to 6As shown, in order to facilitate the rotation of multiple jet heads 56 to improve the uniformity and efficiency of drying, the airflow conveying mechanism 5 further includes a rotary motor 57 and a positioning plate 58; the upper ends of the built-in docking ring 51 and the external docking ring 52 are rotatably mounted on the movable cover 53; a positioning plate 58 is installed in the middle of the built-in docking ring 51, the upper side of the positioning plate 58 is connected to the rotary motor 57, and the upper end of the rotary motor 57 is rotatably connected to the lower center of the movable cover 53 through a power shaft 571.

[0027] like Figures 1 to 6 As shown, to improve the rotational stability of the movable cover 53, the upper ends of both the built-in docking ring 51 and the external docking ring 52 are provided with annular grooves 511; the lower inner and outer sides of the movable cover 53 are provided with positioning rings 531; the positioning rings 531 are rotatably engaged with the annular grooves 511. Furthermore, the lower outer sides of the built-in ring chamber 4 and the lower inner sides of the external ring chamber 3 are fixedly connected by horizontal columns 41. Furthermore, a rotating column 21 is provided on one side of the upper flip frame 2; a connecting slot 11 is provided on one side of the lower positioning frame 1, and a positioning pin 12 is provided on the connecting slot 11; the outer end of the rotating column 21 is rotatably mounted on the positioning pin 12. Furthermore, the lower inner lower end of the lower exhaust pipe 6 is provided with an internally threaded annular surface; the lower periphery of the filter element 7 is provided with an externally threaded cylinder 71; the externally threaded cylinder 71 is threadedly screwed onto the internally threaded annular surface.

[0028] like Figures 1 to 6 As shown, a drying process for a lithium-ion battery anode material precursor dryer includes the following steps: The lithium-ion battery anode material precursor is injected into the annular cavity 31. The vibration-type bearing assembly 8 is turned on, causing the lithium-ion battery anode material precursor to vibrate continuously. Then, the upper flipping frame 2 is rotated onto the lower positioning frame 1, so that the outer docking ring 52 covers the upper periphery of the outer ring chamber 3 and the inner docking ring 51 covers the upper periphery of the inner ring chamber 4. The rotary motor 57 is turned on, driving the movable cover 53, the vent pipe 55, and the jet nozzle 56 to rotate continuously. Finally, hot air is input through the suction heating box 54. The hot air is sprayed downwards into the lithium-ion battery anode material precursor in the annular cavity 31 through multiple rotating jet nozzles 56. Finally, the air is discharged from the lower exhaust pipe 6 and filtered through the filter element 7.

[0029] In the drying process of lithium-ion battery anode material precursor, the present invention supports the lithium-ion battery anode material precursor by means of a vibrating support component 8 installed in the annular cavity 31. The vibrating support component 8 can disperse and vibrate the lithium-ion battery anode material precursor, so that the hot airflow can fully pass through the lithium-ion battery anode material precursor, thereby improving the drying efficiency of the lithium-ion battery anode material precursor. At the same time, the vibration method makes it easier for the lithium-ion battery anode material precursor to separate from the fine impurities during the drying process, avoiding the tedious operation of separating them after adhesion.

[0030] The present invention drives the movable cover 53 to rotate by a rotary motor 57. The movable cover 53 drives multiple air pipes 55 and multiple air nozzles 56 to rotate, so that the annular cavity 31 receives uniform airflow around it, thereby improving drying efficiency and uniformity.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lithium anode material precursor drying machine, characterized in that, The device includes a lower positioning frame, an upper flipping frame, an outer annular compartment, an inner annular compartment, an airflow conveying mechanism, a lower exhaust pipe, a filter element, and a vibrating load-bearing assembly. The upper flipping frame is flipped and installed above the lower positioning frame. The outer annular compartment is installed inside the lower positioning frame. The inner annular compartment is installed around the inner perimeter of the outer annular compartment. Annular cavities are provided on the outer perimeter of the inner annular compartment and the inner perimeter of the outer annular compartment. The vibrating load-bearing assembly is installed within the annular cavities. The filter element is installed inside the lower exhaust pipe, which is installed at the lower end of the outer annular compartment and communicates with the annular cavity. The airflow conveying mechanism is installed inside the upper tilting frame; the airflow conveying mechanism includes an internal docking ring, an external docking ring, a movable cover, an air intake heating box, vent pipes, and a jet nozzle; the external docking ring is fixedly installed around the inner perimeter of the upper tilting frame, and the internal docking ring is installed around the inner perimeter of the external docking ring, forming a closed annular cavity between the external and internal docking rings; a movable cover is installed at the upper end of the internal and external docking rings; an air intake heating box is installed in the middle of the upper end of the movable cover, and multiple vent pipes are connected around the air intake heating box, providing multiple air intakes. The outer ends of the tubes pass through the movable cover and extend into the closed annular cavity, and the outer ends of the vent pipes are connected to the jet nozzles; the upper end of the intake heating box is equipped with an air inlet pipe and an induced draft fan; the vibrating load-bearing assembly includes a support ring, support springs, a vibrator, and an annular dense mesh; support rings are installed around the inner and outer sides of the annular cavity, and multiple support springs are evenly installed around the upper end of the support rings, with an annular dense mesh installed on the upper side of the multiple support springs; multiple vibrators are installed on the lower side of the annular dense mesh; the airflow conveying mechanism also includes a rotary motor. The inner and outer docking rings are fitted with a positioning plate; the upper ends of the inner and outer docking rings are rotatably mounted on the movable cover; a positioning plate is installed in the middle of the inner docking ring, and a rotary motor is connected to the upper side of the positioning plate. The upper end of the rotary motor is rotatably connected to the lower center of the movable cover via a power shaft; annular slots are provided at the upper ends of both the inner and outer sides of the lower end of the movable cover; the positioning slots are rotatably engaged with the annular slots; so that the outer docking ring covers the upper periphery of the outer ring compartment, and the inner docking ring covers the upper periphery of the inner ring compartment.

2. The lithium anode material precursor dryer of claim 1, wherein, The annular dense mesh is provided with longitudinal limiting teeth at both the inner and outer ends of both sides; the annular cavity is provided with a longitudinal limiting groove; the longitudinal limiting teeth are engaged with the longitudinal limiting groove by floating up and down.

3. The lithium-ion battery anode material precursor dryer according to claim 1, characterized in that, The lower outer sides of the built-in ring compartment and the lower inner sides of the external ring compartment are fixedly connected by horizontal columns.

4. The lithium-ion battery anode material precursor dryer according to claim 1, characterized in that, The upper flipping frame has a rotating column on one side; the lower positioning frame has a connecting slot on one side, and a positioning pin is provided on the connecting slot; the outer end of the rotating column is rotatably mounted on the positioning pin.

5. The lithium-ion battery anode material precursor dryer according to claim 1, characterized in that, The lower end of the exhaust pipe is provided with an internal threaded annular surface; the lower end of the filter element is provided with an external threaded cylinder around its perimeter; the external threaded cylinder is threadedly screwed onto the internal threaded annular surface.

6. A drying process for a lithium-ion battery anode material precursor dryer according to claim 1, characterized in that, The steps are as follows: Inject the lithium battery anode material precursor into the annular cavity, turn on the vibration bearing assembly to make the lithium battery anode material precursor vibrate continuously, then rotate the upper flip frame onto the lower positioning frame, turn on the rotary motor to drive the movable cover, vent pipe and jet head to rotate continuously, and finally input hot air through the intake heating box. The hot air is sprayed downward into the lithium battery anode material precursor in the annular cavity through multiple rotating jet heads. Finally, the air is discharged from the lower exhaust pipe and filtered through the filter element.

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