A device for separating spent lithium-ion battery cathode active material from current collector

Abstract

The application discloses a device for separating active material and current collector of a waste lithium ion battery, and relates to the technical field of lithium battery recycling. The device comprises a crushing bin, a crushing roller, a rubbing part, a scattering part, a screening cylinder, a screening mesh cylinder, a powder collecting cavity, a spiral conveying part, a grinding base and grinding bodies. The end face of the spiral conveying part towards the inner wall of the screening cylinder is provided with air holes. The device further comprises a powder collecting bin, a current collector collecting bin and a bag-type dust collector. The crushing roller crushes the battery pole piece to preliminarily separate the active material and the current collector. The rubbing part further separates the active material and the current collector. The scattering part applies a collision force to the rubbed battery pole piece to further separate the active material and the current collector. The active material is discharged into the powder collecting cavity. The airflow discharged from the air holes acts on the screening mesh cylinder to avoid the screening hole from being blocked. The active material and the current collector with a large particle size that cannot pass through the screening mesh cylinder are ground and separated again by the grinding bodies, so that the active material and the current collector are separated.

Description

Technical Field

[0001] This invention relates to the field of lithium battery recycling technology, specifically to a device for separating the positive electrode active material and current collector of waste lithium-ion batteries. Background Technology

[0002] Waste lithium battery positive and negative electrode sheets contain a large number of valuable metal materials (such as lithium, cobalt, nickel, aluminum, copper, etc.). If they are discarded at will, they will cause heavy metal pollution and waste resources. Therefore, recycling them can not only realize resource recycling, but also reduce environmental hazards. It is an important part of the green development of the current new energy industry.

[0003] In the recycling process of waste lithium battery positive and negative electrode sheets, the stripping and shredding machine is one of the core pieces of equipment. Its main function is to separate the active material powder from the metal foil (aluminum foil, copper foil) on the electrode sheets. Currently, the stripping and shredding machines commonly used in the industry are mostly drum-type crushers. The crushing parts inside the drum impact the electrode sheets, causing the active material powder to fall off, and then the powder is separated out through the filter holes of the filter cylinder.

[0004] However, the active material and the current collector have strong adhesion, making it difficult to separate the active material from the current collector in a single crushing process. Furthermore, the powdered active material can easily clog the filter pores, affecting the separation of the active material from the current collector. Summary of the Invention

[0005] The main objective of this invention is to provide a device for separating the positive electrode active material and the current collector of waste lithium-ion batteries, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides an apparatus for separating the positive electrode active material and the current collector of waste lithium-ion batteries, comprising: The crushing assembly includes a crushing chamber and crushing rollers that are rotatably and spaced apart within the crushing chamber. A kneading component is located below the crushing rollers within the crushing chamber. A kneading channel is provided between the kneading component and the crushing chamber, and a dispersing component is located below the kneading component. The kneading component reciprocates under external force, thereby kneading the battery electrode sheets that fall after being crushed by the crushing rollers. The dispersing component is fitted with the crushing chamber with a clearance, and rotates under external force, thereby dispersing the kneaded battery electrode sheets. The screening assembly includes a screening cylinder connected to a crushing chamber and a screening screen cylinder disposed inside the screening cylinder; a powder collection chamber is provided between the screening cylinder and the screening screen cylinder; a spiral conveyor is rotatably disposed inside the screening cylinder; and grinding bases are spaced apart on the screening screen cylinder; the spiral conveyor is clearance-fitted with the screening screen cylinder; air holes are provided on the end face of the spiral conveyor facing the inner wall of the screening cylinder; and grinding bodies are provided on the spiral conveyor; a grinding channel is provided between the grinding bodies and the grinding bases; and the air holes are connected to an external high-pressure air pump. The collection assembly includes a powder collection chamber connected to the powder collection cavity and a current collector collection chamber connected to the screening screen cylinder; the powder collection chamber is equipped with a bag filter and is connected to an external negative pressure pump.

[0007] As a further improvement of the present invention, a crushing motor is provided outside the crushing chamber; the output end of the crushing motor is connected to the crushing roller.

[0008] As a further improvement of the present invention, the crushing roller is provided with crushing shafts at both ends; a driven gear is provided at one end of the crushing shaft; and a transmission gear that meshes with the driven gear is provided at the output end of the crushing motor.

[0009] As a further improvement of the present invention, the kneading component includes a kneading base and a kneading plate installed on the inner wall of the crushing chamber; the kneading plate and the kneading base are fitted together to form a kneading channel, and the kneading plate is slidably installed in the crushing chamber; the output end of the crushing motor is provided with a missing gear; a reciprocating sleeve connected to the kneading plate is slidably provided on the outer wall of the crushing chamber; a rack that meshes with the missing gear is provided at intervals in the reciprocating sleeve.

[0010] As a further improvement of the present invention, two sets of slide rails are installed at intervals on the outer wall of the crushing chamber; the reciprocating sleeve is provided with a slide groove that slides with the slide rails; and a guide plate is inclinedly provided on the inner wall of the crushing chamber between the crushing roller and the kneading plate.

[0011] As a further improvement of the present invention, the dispersing component includes a dispersing shaft rotatably disposed in the crushing chamber and dispersing rods spaced apart and staggered in the circumferential direction of the dispersing shaft; a dispersing motor connected to the dispersing shaft is provided on the outer wall of the crushing chamber; a secondary gear is provided on the dispersing shaft; and a main gear meshing with the secondary gear is provided at the output end of the dispersing motor.

[0012] As a further improvement of the present invention, the bottom end of the crushing chamber is provided with a transition chamber communicating with the screening cylinder; the spiral conveyor includes a drive shaft rotatably mounted on the screening cylinder and a spiral auger connected to the drive shaft; the drive shaft is provided with a rotating gear meshing with the main gear; the spiral auger is located inside the screening cylinder and is in clearance fit with the inner wall of the screening cylinder.

[0013] As a further improvement of the present invention, the spiral auger is provided with a vent pipe parallel to the screening screen cylinder; the air holes are spaced apart on the vent pipe; the inside of the drive shaft is provided with an air supply channel communicating with the vent pipe, and the drive shaft is provided with a rotary joint communicating with the air supply channel; the rotary joint is connected to an external high-pressure air pump.

[0014] As a further improvement of the present invention, the bottom end of the crushing chamber is provided with a collection chamber that communicates with the powder collection chamber.

[0015] The beneficial effects of this invention are reflected in: By incorporating a crushing roller, a kneading component, a dispersing component, and a grinding body, the crushing roller initially separates the active material from the current collector by crushing the battery electrode. The kneading component then further separates the active material from the current collector by kneading the battery electrode. Next, the dispersing component applies a collision force to the kneaded battery electrode, further separating the active material from the current collector. Simultaneously, it separates any active material that has detached but is still encased in the current collector. Under the action of a screw conveyor, the active material is discharged into a powder collection chamber. An accelerated airflow is discharged through the air vents onto the screening cylinder, maintaining the unobstructed flow of the screen holes and preventing clogging. Larger particles of active material and current collector that cannot pass through the screening cylinder are further ground and separated by the grinding body, thus separating the active material from the current collector. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a device for separating the positive electrode active material and the current collector of a waste lithium-ion battery according to the present invention; Figure 2 This is a schematic diagram of the crushing chamber structure of a device for separating the positive electrode active material and the current collector of a waste lithium-ion battery according to the present invention; Figure 3 This is a schematic diagram of the disassembly assembly structure of a device for separating the positive electrode active material and the current collector of a waste lithium-ion battery according to the present invention; Figure 4 This is a schematic diagram of the internal structure of the crushing chamber of a device for separating the positive electrode active material and the current collector of a waste lithium-ion battery according to the present invention; Figure 5 This is a schematic diagram of the connection structure between the crushing motor and the crushing roller in the device for separating the positive electrode active material and the current collector of waste lithium-ion batteries according to the present invention; Figure 6 This is a schematic diagram of the internal structure of the screening cylinder of the device for separating the positive electrode active material and the current collector of waste lithium-ion batteries according to the present invention; Explanation of reference numerals in the attached figures: 1. Crushing chamber; 2. Crushing roller; 3. Kneading component; 301. Kneading base; 302. Kneading plate; 4. Kneading channel; 5. Dispersing component; 501. Dispersing shaft; 502. Dispersing rod; 503. Dispersing motor; 504. Secondary gear; 505. Main gear; 6. Screening cylinder; 7. Screening screen cylinder; 8. Powder collection chamber; 9. Screw conveyor component; 901. Drive shaft; 902. Screw auger; 903. Rotating gear; 10. Grinding base; 11. Air vent; 12. Grinding body; 13. Grinding channel; 14. High-pressure air 15. Pump; 16. Powder collection bin; 17. Current collector collection bin; 18. Bag filter; 19. Negative pressure pump; 20. Crusher motor; 21. Crusher shaft; 22. Driven gear; 23. Transmission gear; 24. Missing gear; 25. Reciprocating sleeve; 26. Rack; 27. Channel; 28. Connecting column; 29. ​​Slide rail; 30. Slide groove; 31. Guide plate; 32. Transition bin; 33. Vent pipe; 34. Air supply channel; 35. Rotary joint; 36. Screen hole; 37. Collection bin; 38. Sealing sleeve; 39. Discharge valve. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are merely some, not all, of the embodiments of this invention. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0018] In one embodiment, see Figure 1 , 6 The present invention provides an apparatus for separating the positive electrode active material and current collector of waste lithium-ion batteries, comprising a crushing component, a screening component, and a collecting component.

[0019] The crushing assembly includes a crushing chamber 1, crushing rollers 2 that are rotatably and spaced apart within the crushing chamber 1, a kneading component 3 located below the crushing rollers 2 within the crushing chamber 1, a kneading channel 4 between the kneading component 3 and the crushing chamber 1, and a dispersing component 5 located below the kneading component 3. The kneading component 3 reciprocates under external force, thereby kneading the battery electrode sheets that fall after being crushed by the crushing rollers 2. The dispersing component 5 is fitted with the crushing chamber 1 with a clearance, and rotates under external force, thereby dispersing the kneaded battery electrode sheets. The screening assembly includes a screening cylinder 6 connected to the crushing chamber 1 and a screening screen cylinder 7 disposed within the screening cylinder 6, with a channel 4 between the screening cylinder 6 and the screening screen cylinder 7. The powder collection chamber 8 has a rotating spiral conveyor 9 inside the sieving cylinder 6, and a grinding base 10 is spaced apart on the sieving cylinder 7. The spiral conveyor 9 is clearance-fitted with the sieving cylinder 7, and the end face of the spiral conveyor 9 facing the inner wall of the sieving cylinder 6 has an air hole 11. The spiral conveyor 9 has a grinding body 12, and a grinding channel 13 is provided between the grinding body 12 and the grinding base 10. The air hole 11 is connected to an external high-pressure air pump 14. The collection assembly includes a powder collection chamber 15 connected to the powder collection chamber 8 and a current collector collection chamber 16 connected to the sieving cylinder 7. A bag filter 17 is provided inside the powder collection chamber 15, and the powder collection chamber 15 is connected to an external negative pressure pump 18.

[0020] In this embodiment, see Figure 2 , 3 The crushing chamber 1 is equipped with a crushing motor 19 on its outside. The output end of the crushing motor 19 is connected to the crushing roller 2. The crushing roller 2 is driven to rotate under the rotation of the crushing motor 19, thereby crushing the battery electrode sheets.

[0021] Specifically, the crushing chamber 1 is a hollow rectangular body with a trumpet-shaped top to facilitate the insertion of battery electrodes into it. Two sets of crushing rollers 2 are provided, with crushing shafts 20 at both ends. Bearings are installed on the crushing chamber 1, and the crushing shafts 20 are connected to the bearings. One end of the crushing shaft 20 passes through the bearing and is equipped with a driven gear 21. The output end of the crushing motor 19 is equipped with a transmission gear 22 that meshes with the driven gear 21. The rotation of the crushing motor 19 drives the transmission gear 22 to rotate. The transmission gear 22 meshes with the driven gear 21, causing the two sets of crushing rollers 2 to rotate in opposite directions to crush the battery electrodes. The crushed electrodes fall into the kneading component 3.

[0022] In this embodiment, see Figure 4During the crushing process of the crushing roller 2, some active material separates from the current collector and falls into the kneading component 3. In order to further separate the active material from the current collector, the crushed motor electrode is kneaded by the kneading component 3. The kneading component 3 includes a kneading base 301 and a kneading plate 302 installed on the inner wall of the crushing chamber 1. The kneading plate 302 and the kneading base 301 are fitted together to form a kneading channel 4. The kneading plate 302 is slidably installed in the crushing chamber 1. The output end of the crushing motor 19 is provided with a missing gear 23. A reciprocating sleeve 24 connected to the kneading plate 302 is slidably provided on the outer wall of the crushing chamber 1. A rack 25 that meshes with the missing gear 23 is provided in the reciprocating sleeve 24 at intervals.

[0023] Specifically, see Figure 5 The outer wall of the crushing chamber 1 is vertically provided with a channel 26, and the kneading plate 302 is provided with a connecting column 27 that passes through the channel 26. The connecting column 27 is connected to the reciprocating sliding sleeve 24. The reciprocating sliding sleeve 24 is a hollow rectangular frame. Racks 25 are installed on the two sets of vertical inner walls of the reciprocating sliding sleeve 24 respectively. During the rotation of the crushing motor 19, the missing gear 23 intermittently meshes with the two sets of racks 25, thereby driving the reciprocating sliding sleeve 24 to move up or down. The kneading plate 302 moves up or down accordingly to knead the crushed motor pole pieces, further separating the active material from the current collector.

[0024] Specifically, to ensure the stability of the kneading plate 302 installation, two sets of slide rails 28 are installed at intervals on the outer wall of the crushing chamber 1, and the reciprocating sleeve 24 is provided with a slide groove 29 that slides with the slide rail 28.

[0025] Specifically, a guide plate 30 is inclinedly provided on the inner wall of the crushing chamber 1 between the crushing roller 2 and the kneading plate 302. The crushed battery electrode sheets fall along the guide plate 30 into the kneading channel 4 to avoid the battery electrode sheets accumulating on the kneading base 301 or the top of the kneading plate 302.

[0026] In this embodiment, see Figure 4 The dispersing component 5 includes a dispersing shaft 501 rotatably disposed in the crushing chamber 1 and dispersing rods 502 spaced apart and staggered around the dispersing shaft 501. A dispersing motor 503 connected to the dispersing shaft 501 is provided on the outer wall of the crushing chamber 1.

[0027] Specifically, a bearing is installed between the crushing chamber 1 and the dispersing shaft 501. The dispersing shaft 501 is equipped with a secondary gear 504. The output end of the dispersing motor 503 is equipped with a main gear 505 that meshes with the secondary gear 504. When the dispersing motor 503 rotates, it drives the dispersing shaft 501 and the dispersing rod 502 to rotate, applying a striking force to the active material and battery electrode falling from the kneading channel 4, breaking up the battery electrode that has gathered together during the kneading process, and further separating the active material from the current collector.

[0028] In this embodiment, see Figure 2 , 6 The bottom end of the crushing chamber 1 is provided with a transition chamber 31 that communicates with the screening cylinder 7. The screw conveyor 9 includes a drive shaft 901 rotatably mounted on the screening cylinder 6 and a screw auger 902 connected to the drive shaft 901. The drive shaft 901 is provided with a rotating gear 903 that meshes with the main gear 505. The screw auger 902 is located inside the screening cylinder 7 and is in clearance fit with the inner wall of the screening cylinder 7.

[0029] Specifically, both the screening cylinder 6 and the screening screen cylinder 7 are hollow cylinders. The outer diameter of the screening screen cylinder 7 is smaller than the inner diameter of the screening cylinder 6, thus forming a powder collection chamber 8 between the screening cylinder 6 and the screening screen cylinder 7. A bearing is installed between the screening cylinder 6 and the rotating shaft. During the rotation of the dispersing motor 503, the main gear 505 meshes with the rotating gear 903, thereby driving the spiral auger 902 to rotate. The spiral auger 902 is a shaftless auger. After the dispersed active material and the current collector enter the screening screen cylinder 7 along the transition chamber 31, they move along the screening screen cylinder 7 under the push of the spiral auger 902. The powdered active material passes through the screening screen cylinder 7 and enters the powder collection chamber 8, and falls into the bag filter dust collector 17 for collection. Some of the active material and current collector with larger particle size move along the axial direction of the screening screen cylinder 7 with the spiral auger 902 and enter the grinding channel 13.

[0030] Specifically, the spiral auger 902 is equipped with a vent pipe 32 parallel to the screening cylinder 7, and air holes 11 are spaced apart on the vent pipe 32. The drive shaft 901 is equipped with an air supply channel 33 connected to the vent pipe 32. The drive shaft 901 is equipped with a rotary joint 34 connected to the air supply channel 33. The rotary joint 34 is connected to an external high-pressure air pump 14. During the rotation of the spiral auger 902, the vent pipe 32 rotates accordingly. The high-pressure air pump 14 inputs the pressurized airflow into the vent pipe 32 and discharges it from the air holes 11. The accelerated airflow discharged from the air holes 11 blows towards the screening cylinder 7, accelerating the passage of active material through the screen holes 35 on the screening cylinder 7. At the same time, the accelerated airflow cleans the screen holes 35 to prevent them from becoming clogged.

[0031] In this embodiment, see Figure 6 Two sets of grinding bases 10 are arranged at intervals. The inner wall of the grinding base 10 and the inner wall of the sieve cylinder 7 are on the same plane. The grinding body 12 is connected to the spiral auger 902. During the rotation of the spiral auger 902, some active materials and current collectors are pushed to the grinding channel 13. The grinding body 12 rotates with the spiral auger 902 to grind the active materials and current collectors that enter the grinding channel 13, reduce the particle size of the active materials, and at the same time separate the active materials and current collectors. The ground active materials and current collectors move along the sieve cylinder 7. The active materials pass through the sieve cylinder 7 and enter the powder collection chamber 8. The current collectors are pushed into the current collector collection chamber 16 by the spiral auger 902.

[0032] Specifically, the grinding base 10 is a hollow cylinder with openings at both ends. The grinding base 10 is welded to the screening cylinder 7. A total of two sets of grinding bases 10 and three sets of screening cylinders 7 are set. The length of the grinding base 10 is controlled between 50mm and 80mm to shorten the moving distance of the active material and the current collector in the grinding channel 13, so that the active material and the current collector can pass through the grinding channel 13 quickly.

[0033] In this embodiment, see Figure 2 , 6 The bottom of the crushing chamber 1 is provided with a collection chamber 36 that is connected to the powder collection chamber 15. The collection chamber 36 has a triangular structure, which facilitates the guidance of active materials to the bag filter 17 inside the powder collection chamber 15. The powder collection chamber 15 has a hollow cylindrical structure. There is a gap between the bag filter 17 and the powder collection chamber 15. A sealing sleeve 37 is provided between one end of the bag filter 17 and the bottom end of the collection chamber 36. The negative pressure pump 18 is connected to the powder collection chamber 15. Under the suction of the negative pressure pump 18, a negative pressure is generated in the screening cylinder 7 to draw the active materials into the bag filter 17 for storage. The bottom end of the bag filter 17 is provided with a discharge valve 38 to remove the active materials. Under the action of negative pressure, external air enters the crushing chamber 1 and draws in the smoke and dust generated during the crushing process to prevent it from escaping.

[0034] In this embodiment, the bottom end of the current collector 16 is also provided with a discharge valve 38 to facilitate the removal of the current collector.

[0035] In this invention, the battery electrode sheets are crushed by the crushing roller 2 and then enter the kneading channel 4. During the crushing process, the active material and the current collector are separated. The kneading plate 302 applies kneading force to the battery electrode sheets, further separating the active material and the current collector. The separated battery electrode sheets fall into the dispersing component 5 area. The dispersing rod 502 further disperses and separates the active material and the current collector. The active material and the current collector enter the screening cylinder 7 and move along the screening cylinder 7 under the conveying of the spiral auger 902. Some of the active material passes through the screening cylinder 7 and enters the powder collection space, and is collected in the bag filter 17 under negative pressure. Some of the active material and the current collector with larger particle size enter the grinding channel 13 for grinding. The ground active material enters the bag filter 17 for collection. The current collector enters the current collector collection chamber 16 for collection under the conveying of the spiral auger 902, thereby completing the separation and collection of the active material and the current collector.

[0036] 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 device for separating the positive electrode active material and the current collector of waste lithium-ion batteries, characterized in that, include: The crushing assembly includes a crushing chamber (1) and a crushing roller (2) that is rotatably and spaced apart inside the crushing chamber (1); a kneading component (3) is provided inside the crushing chamber (1) and located below the crushing roller (2); a kneading channel (4) is provided between the kneading component (3) and the crushing chamber (1), and a dispersing component (5) is provided below the kneading component (3); the kneading component (3) moves back and forth under the action of external force, thereby kneading the battery electrode sheets that fall after being crushed by the crushing roller (2); the dispersing component (5) is fitted with the crushing chamber (1) with a clearance, and the dispersing component (5) rotates under the action of external force, thereby dispersing the kneaded battery electrode sheets; The screening assembly includes a screening cylinder (6) connected to the crushing chamber (1) and a screening screen cylinder (7) disposed inside the screening cylinder (6); a powder collection chamber (8) is provided between the screening cylinder (6) and the screening screen cylinder (7); a spiral conveyor (9) is rotatably disposed inside the screening cylinder (6); a grinding base (10) is provided on the screening screen cylinder (7) at intervals; the spiral conveyor (9) is clearance-fitted with the screening screen cylinder (7); an air hole (11) is provided on the end face of the spiral conveyor (9) facing the inner wall of the screening cylinder (6); a grinding body (12) is provided on the spiral conveyor (9); a grinding channel (13) is provided between the grinding body (12) and the grinding base (10); the air hole (11) is connected to an external high-pressure air pump (14); The collection assembly includes a powder collection chamber (15) connected to the powder collection cavity (8) and a current collector collection chamber (16) connected to the screening cylinder (7); the powder collection chamber (15) is equipped with a bag filter (17) and the powder collection chamber (15) is connected to an external negative pressure pump (18).

2. The apparatus for separating the positive electrode active material and the current collector of waste lithium-ion batteries according to claim 1, characterized in that: The crushing chamber (1) is equipped with a crushing motor (19) on its exterior; the output end of the crushing motor (19) is connected to the crushing roller (2).

3. The apparatus for separating the positive electrode active material and the current collector of waste lithium-ion batteries according to claim 2, characterized in that: The crushing roller (2) has a crushing shaft (20) at both ends; a driven gear (21) is provided at one end of the crushing shaft (20); and a transmission gear (22) that meshes with the driven gear (21) is provided at the output end of the crushing motor (19).

4. The apparatus for separating the positive electrode active material and the current collector of a waste lithium-ion battery according to claim 3, characterized in that: The kneading component (3) includes a kneading base plate (301) and a kneading plate (302) installed on the inner wall of the crushing chamber (1); the kneading plate (302) and the kneading base plate (301) are fitted together to form a kneading channel (4), and the kneading plate (302) is slidably installed in the crushing chamber (1); the output end of the crushing motor (19) is provided with a missing gear (23); a reciprocating sleeve (24) connected to the kneading plate (302) is slidably provided on the outer wall of the crushing chamber (1); a rack (25) that meshes with the missing gear (23) is provided at intervals in the reciprocating sleeve (24).

5. The apparatus for separating the positive electrode active material and the current collector of a waste lithium-ion battery according to claim 4, characterized in that: Two sets of slide rails (28) are installed at intervals on the outer wall of the crushing chamber (1); the reciprocating slide sleeve (24) is provided with a slide groove (29) that slides with the slide rails (28); the inner wall of the crushing chamber (1) is provided with a guide plate (30) located between the crushing roller (2) and the kneading plate (302).

6. The apparatus for separating the positive electrode active material and the current collector of a waste lithium-ion battery according to claim 5, characterized in that: The dispersing component (5) includes a dispersing shaft (501) rotatably disposed in the crushing chamber (1) and dispersing rods (502) spaced apart and staggered around the dispersing shaft (501); a dispersing motor (503) connected to the dispersing shaft (501) is provided on the outer wall of the crushing chamber (1); a secondary gear (504) is provided on the dispersing shaft (501); and a main gear (505) meshing with the secondary gear (504) is provided at the output end of the dispersing motor (503).

7. The apparatus for separating the positive electrode active material and the current collector of a waste lithium-ion battery according to claim 6, characterized in that: The bottom end of the crushing chamber (1) is provided with a transition chamber (31) that communicates with the screening cylinder (7); the screw conveyor (9) includes a drive shaft (901) rotatably mounted on the screening cylinder (6) and a screw auger (902) connected to the drive shaft (901); the drive shaft (901) is provided with a rotating gear (903) that meshes with the main gear (505); the screw auger (902) is located inside the screening cylinder (7) and is in clearance fit with the inner wall of the screening cylinder (7).

8. The apparatus for separating the positive electrode active material and the current collector of a waste lithium-ion battery according to claim 7, characterized in that: The spiral auger (902) is provided with a vent pipe (32) parallel to the screening cylinder (7); the air holes (11) are spaced apart on the vent pipe (32); the drive shaft (901) is provided with an air supply channel (33) communicating with the vent pipe (32), and the drive shaft (901) is provided with a rotary joint (34) communicating with the air supply channel (33); the rotary joint (34) is connected to an external high-pressure air pump (14).

9. The apparatus for separating the positive electrode active material and the current collector of a waste lithium-ion battery according to claim 8, characterized in that: The bottom end of the crushing chamber (1) is provided with a collection chamber (36) that is connected to the powder collection chamber (15).

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