A reactor for producing negative electrode materials for lithium-ion batteries

Abstract

The present invention discloses a reactor for producing negative electrode materials for lithium ion batteries in the field of producing negative electrode materials for lithium ion batteries, comprising a reactor body, a stirring motor, a rotating rod, stirring blades, auxiliary stirring blades, a feeding pipe, an air inlet tube and an air outlet tube, wherein a main stirring rod is fixedly connected to the outer wall of the rotating rod, and two main stirring rods are arranged. The present invention arranges a sealing cylinder and a feeding mechanism, and after the negative electrode materials are mixed inside the reactor body, the rotating rod rotates to flip the side with the feeding hole on the sealing cylinder to the inside of the reactor body, and the evenly mixed liquid negative electrode materials are directly fed through the feeding pipe through the annular through pipe, and the block materials that are not completely mixed are blocked outside the sealing cylinder and continue to be stirred inside the reactor body, and can be directly screened during the feeding process, and has a simple structure, is easy to use, saves time, and can improve the production efficiency of motor materials.

Description

Technical Field

[0001] The invention relates to the field of production of negative electrode materials for lithium ion batteries, in particular to a reaction kettle for production of negative electrode materials for lithium ion batteries. Background Art

[0002] The negative electrode of a lithium-ion battery is made by mixing carbon material or non-carbon material, adhesive and additives to form a paste-like adhesive that is evenly applied on both sides of the copper foil, dried and rolled. The key to whether a lithium-ion battery can be successfully manufactured lies in whether a negative electrode material that can reversibly release / insert lithium ions can be prepared. When producing the negative electrode material of a lithium-ion battery, a reactor is required for mixing.

[0003] At present, in the existing reactor for producing negative electrode materials of lithium-ion batteries, after the negative electrode materials are mixed, there are still block materials that are not completely mixed in the liquid mixed materials. After screening operation, they need to be put back into the reactor for heating and mixing. The operation is cumbersome, wastes time, and affects the normal production efficiency of motor materials. Summary of the invention

[0004] The purpose of the present invention is to provide a reactor for producing negative electrode materials for lithium-ion batteries to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a reactor for producing negative electrode materials for lithium-ion batteries, comprising a reactor body, a stirring motor, a rotating rod, stirring blades, auxiliary stirring blades, a feeding pipe, an air inlet tube and an air outlet tube, a main stirring rod is fixedly connected to the outer wall of the rotating rod, two main stirring rods are provided, and one end of the two main stirring rods away from the rotating rod is fixedly connected to a U-shaped plate, the bottom of the reactor body is fixedly connected to a discharge box, the inner side wall of the discharge box is rotatably connected to a rotating rod, a sealing cylinder is fixedly sleeved on the outer wall of the rotating rod, and two symmetrically arranged filling plates are slidably sleeved on the outer wall of the sealing cylinder. The two filling plates are fixedly connected to the inner wall of the discharge box on one side, and a sealing plate is fixedly connected to the outer wall of the sealing cylinder. An annular through pipe is sleeved on the outer wall of the discharge box, and a discharge pipe is fixedly connected to the outer wall of the annular through pipe. A discharge mechanism is provided on the side of the rotating rod away from the sealing plate, and the discharge mechanism is located inside the sealing cylinder. One end of the rotating rod extends to the outside of the discharge box, and a driving motor is fixedly connected to the outer wall of the discharge box through an L-shaped support frame, and the output end of the driving motor is fixedly connected to one end of the rotating rod located in the discharge box, and a scraping mechanism is provided between the two vertical ends of the U-shaped plate.

[0006] As a further solution of the present invention, the unloading mechanism includes a partition plate, a unloading hole, an arched unloading plate, a unloading pipe and a docking pipe. Two partition plates are provided, and the two partition plates are both located on the side of the rotating rod away from the sealing plate. Both ends of the partition plate are fixedly connected to the inner side wall of the sealing tube. Two unloading pipes are provided, and the two unloading pipes are both located between the two partition plates. There are multiple unloading holes, and the multiple unloading holes are all located on the side of the partition plate away from the sealing plate. The multiple unloading holes are evenly opened on the side wall of the sealing tube. The arched unloading plate is located between the unloading hole and the unloading pipe. , one end of the arched blanking plate away from the blanking hole is fixedly connected to the partition plate, both ends of the blanking pipe extend to the outside of the envelope, the outer side wall of the blanking pipe located inside the envelope extends to the side of the partition plate close to the arched blanking plate, and the blanking pipe is arranged at the outer side wall opening between the partition plate and the blanking hole, four butt joints are arranged, and the four butt joints are distributed on both sides of the envelope in pairs, and both ends of each butt joint pass through the blanking box, and the end of each butt joint away from the envelope is fixedly connected to the annular through pipe, and the caliber of each butt joint is the same as the caliber of the two ends of the blanking pipe.

[0007] As a further solution of the present invention, two opposite inner walls of the docking tube are provided with annular grooves, both ends of the discharge pipe extend to the interior of the annular grooves, each end of the docking tube away from the annular through pipe is connected to the annular groove, and four blocking plates matched with the diameter of the docking tube are provided on the side of the rotating rod close to the sealing plate, and the four blocking plates are respectively slidably connected in pairs to the interior of the two annular grooves, and the four blocking plates are respectively fixedly connected in pairs to the opposite side walls of the sealing tube.

[0008] As a further solution of the present invention, a sealing gasket is provided between each of the blocking plates and the sealing tube, and each of the sealing gaskets is fixedly connected to an end of the butt joint tube away from the annular through pipe.

[0009] As a further scheme of the present invention, the scraping mechanism includes an outer cylinder, a push rod, a spring, a push piece and a scraper. The outer cylinder, the push rod, the spring and the push piece are each provided with two, the two outer cylinders are fixedly connected to the horizontal end of the U-shaped plate, one end of the two push rods is fixedly connected to the scraper, the scraper is slidably connected between the two vertical ends of the U-shaped plate, the sides of the two push rods away from the scraper are slidably connected to the inside of the outer cylinder, the two push pieces are fixedly connected to the end of the push rod located inside the outer cylinder, the ends of the two springs close to the push rod are fixedly connected to the push piece, and the ends of the two springs away from the push piece are fixedly connected to the side of the inner wall of the outer cylinder away from the scraper.

[0010] As a further solution of the present invention, a connecting plate is fixedly connected between the two outer cylinders, and scraping rings are slidably sleeved on the rod walls of the two push rods outside the outer cylinders, and the two scraping rings are fixedly connected to the outer cylinder on one side away from the scraper.

[0011] As a further solution of the present invention, two symmetrical sealing sleeves are arranged between the two filling plates, and the sides of the two sealing sleeves close to each other are fixedly connected to the two opposite outer walls of the sealing cylinder, and the sides of the two sealing sleeves far away from each other are against the inner wall of the discharge box.

[0012] As a further solution of the present invention, a plurality of evenly distributed auxiliary stirring blades are fixedly connected to the outer side wall of each main stirring rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention provides a sealing tube and a feeding mechanism. After the negative electrode materials are mixed in the reactor body, the rotating rod rotates to flip the side of the sealing tube with the feeding hole to the inside of the reactor body. The evenly mixed liquid negative electrode materials are directly fed through the discharge pipe through the annular through pipe. The block materials that are not completely mixed are blocked outside the sealing tube and continue to be stirred inside the reactor body. Screening can be performed directly during the feeding process. The structure is simple, easy to use, time-saving, and the production efficiency of motor materials can be improved.

[0015] 2. The present invention provides a scraping mechanism. During the process of unloading the negative electrode material after mixing in the reactor body, the scraper can move closely against the outer wall of the sealing cylinder with the unloading hole, and scrape off the negative electrode material blocked on the unloading hole, so as to avoid the block material that is not completely mixed from blocking the unloading hole, so that the unloading process of the evenly mixed negative electrode material can proceed normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 Schematic diagram of the internal structure of the sealing tube in the present invention;

[0018] Figure 3 It is a schematic diagram of the internal structure of the material box in the present invention;

[0019] Figure 4 for Figure 1 Enlarged schematic diagram of part A.

[0020] In the figure:

[0021] 1. Reactor body; 11. Stirring motor; 12. Rotating rod; 13. Stirring fan blade; 14. Auxiliary stirring blade; 15. Air inlet tube; 16. Air outlet tube; 17. Feed pipe;

[0022] 2. Main stirring rod; 21. Auxiliary stirring blade; 22. U-shaped plate;

[0023] 3. Scraping mechanism; 31. Outer cylinder; 32. Push rod; 33. Spring; 34. Push piece; 35. Scraping ring; 36. Scraping plate; 37. Connecting plate;

[0024] 4. Unloading box; 41. Sealing tube; 42. Rotating rod; 43. Driving motor; 44. L-shaped support frame; 45. Sealing plate; 46. Partition plate; 47. Filling plate; 48. Sealing sleeve;

[0025] 5. Feeding mechanism; 51. Feeding hole; 52. Arched feeding plate; 53. Feeding pipe; 54. Butt-joint pipe; 55. Annular through pipe; 56. Discharging pipe; 57. Sealing pad; 58. Blocking plate; 59. Annular slide groove. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-4In an embodiment of the present invention, a reactor for producing negative electrode materials for lithium-ion batteries includes a reactor body 1, a stirring motor 11, a rotating rod 12, a stirring fan blade 13, an auxiliary stirring blade 14, a feeding pipe 17, an air inlet tube 15 and an air outlet tube 16. A main stirring rod 2 is fixedly connected to the outer wall of the rotating rod 12. Two main stirring rods 2 are provided. One end of the two main stirring rods 2 away from the rotating rod 12 is fixedly connected to a U-shaped plate 22. The bottom of the reactor body 1 is fixedly connected to a discharge box 4. The inner side wall of the discharge box 4 is rotatably connected to a rotating rod 42. A sealing tube 41 is fixedly sleeved on the outer wall of the rotating rod 42. Two symmetrically arranged filling plates 47 are slidably sleeved on the outer wall of the sealing tube 41. The two filling plates 47 are symmetrically sleeved on the outer wall of the sealing tube 41. The side away from the filling plate 47 is fixedly connected to the inner wall of the discharge box 4, the outer wall of the sealing cylinder 41 is fixedly connected with a sealing plate 45, the outer wall of the discharge box 4 is sleeved with an annular through pipe 55, and the outer wall of the annular through pipe 55 is fixedly connected with a discharge pipe 56, and a discharge mechanism 5 is provided on the side of the rotating rod 42 away from the sealing plate 45, and the discharge mechanism 5 is located inside the sealing cylinder 41, and one end of the rotating rod 42 extends to the outside of the discharge box 4, and a driving motor 43 is fixedly connected to the outer wall of the discharge box 4 through an L-shaped support frame 44, and the output end of the driving motor 43 is fixedly connected to one end of the rotating rod 42 located in the discharge box 4, and a scraping mechanism 3 is provided between the two vertical ends of the U-shaped plate 22.

[0028] The unloading mechanism 5 includes a partition plate 46, an unloading hole 51, an arched unloading plate 52, an unloading pipe 53 and a butt joint pipe 54. Two partition plates 46 are provided. The two partition plates 46 are both located on the side of the rotating rod 42 away from the sealing plate 45. Both ends of the partition plate 46 are fixedly connected to the inner wall of the sealing cylinder 41. Two unloading pipes 53 are provided. The two unloading pipes 53 are both located between the two partition plates 46. The unloading hole 51 is provided with a plurality of The feed holes 51 are all located on the side of the partition plate 46 away from the sealing plate 45, and a plurality of the feed holes 51 are evenly arranged on the side wall of the sealing tube 41. The arched feed plate 52 is located between the feed holes 51 and the feed pipe 53. One end of the arched feed plate 52 away from the feed holes 51 is fixedly connected to the partition plate 46. Both ends of the feed pipe 53 extend to the outside of the sealing tube 41. The outer side wall of the feed pipe 53 located inside the sealing tube 41 extends to the partition plate 46 near the arched feed plate. On one side of 52, the discharge pipe 53 is arranged at the outer wall opening between the partition plate 46 and the discharge hole 51, and four docking pipes 54 are arranged, and the four docking pipes 54 are distributed on both sides of the sealing cylinder 41 in pairs, and both ends of each of the docking pipes 54 pass through the discharge box 4, and one end of each of the docking pipes 54 away from the sealing cylinder 41 is fixedly connected with the annular through pipe 55, and the caliber of each of the docking pipes 54 is the same as the caliber at both ends of the discharge pipe 53, and the evenly mixed negative electrode material can enter the interior of the sealing cylinder 41 through the discharge hole 51, and enter the interior of the discharge pipe 53 through the arched discharge plate 52, and the evenly mixed liquid negative electrode material is discharged directly through the discharge pipe 56 through the annular through pipe 55, and the block material that is not completely mixed is blocked outside the sealing cylinder 41, and continues to be stirred inside the reactor body 1 until it is mixed and formed, and then it can be discharged through the discharge hole 51, the discharge pipe 53, and the docking pipe 54, and can be directly screened during the discharge process.

[0029] Among them, the two opposite inner walls of the docking tube 54 are both provided with annular grooves 59, and both ends of the discharge pipe 53 extend to the inside of the annular grooves 59. The end of each docking tube 54 away from the annular through pipe 55 is connected to the annular groove 59. The side of the rotating rod 42 close to the sealing plate 45 is provided with four blocking plates 58 adapted to the diameter of the docking tube 54. The four blocking plates 58 are respectively slidably connected in pairs inside the two annular grooves 59, and the four blocking plates 58 are respectively fixedly connected in pairs to the opposite side walls of the sealing tube 41. When the sealing tube 41 is flipped, it can drive the discharge pipe 53 to extend to the two ends of the annular groove 59 and dock with the docking tube 54.

[0030] Among them, a sealing gasket 57 is arranged between each of the blocking plates 58 and the sealing tube 41, and each of the sealing gaskets 57 is fixedly connected to one end of the butt joint 54 away from the annular through pipe 55. The sealing gasket 57 can improve the sealing performance between the butt joint 54 and the discharge pipe 53.

[0031] The scraping mechanism 3 includes an outer cylinder 31, a push rod 32, a spring 33, a push piece 34 and a scraper 36. The outer cylinder 31, the push rod 32, the spring 33 and the push piece 34 are each provided with two, the two outer cylinders 31 are fixedly connected to the horizontal end of the U-shaped plate 22, one end of the two push rods 32 is fixedly connected to the scraper 36, the scraper 36 is slidably connected between the two vertical ends of the U-shaped plate 22, the side of the two push rods 32 away from the scraper 36 is slidably connected to the inside of the outer cylinder 31, and the two push pieces 34 are fixedly connected to the The push rod 32 is located at one end inside the outer cylinder 31, and the ends of the two springs 33 close to the push rod 32 are fixedly connected to the push piece 34, and the ends of the two springs 33 away from the push piece 34 are fixedly connected to the side of the inner wall of the outer cylinder 31 away from the scraper 36. The scraper 36 between the two U-shaped plates 22 can move closely against the outer wall of the sealing cylinder 41 with the discharge hole 51 on the side, scrape off the negative electrode material blocked on the discharge hole 51, avoid the block material that is not completely mixed from blocking the discharge hole 51, and enable the process of discharging the mixed negative electrode material to proceed normally.

[0032] Among them, a connecting plate 37 is fixedly connected between the two outer cylinders 31, and the two top rods 32 are slidably sleeved with scraping rings 35 on the rod wall outside the outer cylinder 31. The two scraping rings 35 are fixedly connected to the outer cylinder 31 on one side away from the scraper 36. The connecting plate 37 can strengthen the connection between the two outer cylinders 31, and at the same time, when the main stirring rod 2 rotates, it can stir the negative electrode material.

[0033] Among them, two symmetrical sealing sleeves 48 are arranged between the two filling plates 47, and the sides of the two sealing sleeves 48 that are close to each other are fixedly connected to the two opposite outer side walls of the sealing cylinder 41, and the sides of the two sealing sleeves 48 that are far away from each other are both against the inner side wall of the discharge box 4. When the sealing plate 45 is inside the reactor body 1, the sealing sleeve 48 and the filling plate 47 can be filled in the gap between the sealing cylinder 41 and the inner side wall of the discharge box 4 to prevent leakage of the negative electrode material.

[0034] Wherein, a plurality of evenly distributed auxiliary stirring blades 21 are fixedly connected to the outer side wall of each main stirring rod 2 .

[0035] The working principle of the present invention is as follows: when the present invention is used, a power source is connected. After the negative electrode material is mixed inside the reactor body 1, the driving motor 43 is started, and its output end drives the rotating rod 42 to rotate, thereby driving the sealing tube 41 to rotate between the two filling plates 47, flipping the sealing plate 45 to the inner bottom end of the discharge box 4, and flipping the side with the discharge hole 51 on the sealing tube 41 to the inside of the reactor body 1. The evenly mixed negative electrode material can enter the inside of the sealing tube 41 through the discharge hole 51, and enter the inside of the discharge pipe 53 through the arched discharge plate 52. When the sealing tube 41 is flipped, it can drive the discharge pipe 53 to extend to both ends of the annular chute 59 and dock with the docking pipe 54. The evenly mixed liquid negative electrode material is discharged directly through the discharge pipe 56 through the annular through pipe 55. The block material that is not completely mixed is blocked outside the sealing tube 41, and continues to be stirred inside the reactor body 1 until it is mixed and formed. The material can be discharged through the discharge hole 51, the discharge pipe 53, and the docking pipe 54, and screening can be performed directly during the discharge process. The structure is simple, easy to use, time-saving, and the production efficiency of motor materials can be improved. When the sealing plate 45 is inside the reactor body 1, the sealing sleeve 48 and the filling plate 47 can be filled in the gap between the sealing cylinder 41 and the inner wall of the discharge box 4 to prevent leakage of the negative electrode material. By setting the scraping mechanism 3, in the process of discharging the negative electrode material after mixing in the reactor body 1, the stirring motor 11 is started, and the two main stirring rods 2 are driven to rotate by the rotating rod 12. The scraper 36 between the two U-shaped plates 22 can move closely against the outer wall of the sealing cylinder 41 with the discharge hole 51 on one side, scrape off the negative electrode material blocked on the discharge hole 51, avoid the block material that is not completely mixed from blocking the discharge hole 51, and make the process of discharging the mixed negative electrode material proceed normally.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A reactor for producing negative electrode materials for lithium-ion batteries, comprising a reactor body (1), a stirring motor (11), a rotating rod (12), a stirring fan blade (13), an auxiliary stirring blade (14), a feed pipe (17), an air inlet cylinder (15) and an air outlet cylinder (16), characterized in that: A main stirring rod (2) is fixedly connected to the outer wall of the rotating rod (12), two main stirring rods (2) are provided, and one end of the two main stirring rods (2) away from the rotating rod (12) is fixedly connected to a U-shaped plate (22). The bottom of the reactor body (1) is fixedly connected to a material discharge box (4), and the inner wall of the material discharge box (4) is rotatably connected to a rotating rod (42). A sealing cylinder (41) is fixedly sleeved on the outer wall of the rotating rod (42), and two symmetrically arranged filling plates (47) are slidably sleeved on the outer wall of the sealing cylinder (41). The two sides of the two filling plates (47) away from each other are fixedly connected to the inner wall of the material discharge box (4), and the outer wall of the sealing cylinder (41) is fixedly connected to a sealing plate ( 45), an annular through-tube (55) is sleeved on the outer wall of the material discharge box (4), a discharge pipe (56) is fixedly connected to the outer wall of the annular through-tube (55), a material discharge mechanism (5) is arranged on the side of the rotating rod (42) away from the sealing plate (45), the material discharge mechanism (5) is located inside the sealing cylinder (41), one end of the rotating rod (42) extends to the outside of the material discharge box (4), a driving motor (43) is fixedly connected to the outer wall of the material discharge box (4) via an L-shaped support frame (44), the output end of the driving motor (43) is fixedly connected to one end of the rotating rod (42) located in the material discharge box (4), and a scraping mechanism (3) is arranged between the two vertical ends of the U-shaped plate (22); The material discharge mechanism (5) comprises a partition plate (46), a material discharge hole (51), an arched material discharge plate (52), a material discharge pipe (53) and a butt joint pipe (54); two partition plates (46) are provided, and the two partition plates (46) are both located on the side of the rotating rod (42) away from the sealing plate (45); both ends of the partition plate (46) are fixedly connected to the inner side wall of the sealing cylinder (41); two material discharge pipes (53) are provided, and the two material discharge pipes (53) are both located between the two partition plates (46); a plurality of material discharge holes (51) are provided, and the plurality of material discharge holes (51) are all located on the side of the partition plate (46) away from the sealing plate (45); the plurality of material discharge holes (51) are evenly arranged on the side wall of the sealing cylinder (41); the arched material discharge plate (52) is located between the material discharge hole (51) and the material discharge pipe (53); One end of the arched material discharge plate (52) away from the material discharge hole (51) is fixedly connected to the partition plate (46), both ends of the material discharge pipe (53) extend to the outside of the sealing tube (41), the outer wall of the material discharge pipe (53) located inside the sealing tube (41) extends to the side of the partition plate (46) close to the arched material discharge plate (52), the material discharge pipe (53) is arranged at the outer wall opening between the partition plate (46) and the material discharge hole (51), four butt joint pipes (54) are arranged, and the four butt joint pipes (54) are distributed in pairs on both sides of the sealing tube (41), both ends of each butt joint pipe (54) pass through the material discharge box (4), and one end of each butt joint pipe (54) away from the sealing tube (41) is fixedly connected to the annular through pipe (55), and the caliber of each butt joint pipe (54) is the same as the caliber of the two ends of the material discharge pipe (53); The scraping mechanism (3) comprises an outer cylinder (31), a push rod (32), a spring (33), a push piece (34) and a scraper (36); two of the outer cylinder (31), the push rod (32), the spring (33) and the push piece (34) are provided; the two outer cylinders (31) are fixedly connected to the horizontal end of the U-shaped plate (22); one end of the two push rods (32) is fixedly connected to the scraper (36); the scraper (36) is slidably connected to the U-shaped plate (22); Between the two vertical ends, the sides of the two push rods (32) away from the scraper (36) are slidably connected to the inside of the outer tube (31), the two push pieces (34) are fixedly connected to one end of the push rod (32) located inside the outer tube (31), the ends of the two springs (33) close to the push rod (32) are fixedly connected to the push piece (34), and the ends of the two springs (33) away from the push piece (34) are fixedly connected to a side of the inner wall of the outer tube (31) away from the scraper (36).

2. A reaction kettle for producing negative electrode materials for lithium-ion batteries according to claim 1, characterized in that: The two opposite inner side walls of the butt joint tube (54) are provided with annular grooves (59), both ends of the feed tube (53) extend into the inside of the annular grooves (59), and one end of each butt joint tube (54) away from the annular through tube (55) is connected to the annular groove (59), and four blocking plates (58) adapted to the diameter of the butt joint tube (54) are provided on the side of the rotating rod (42) close to the sealing plate (45), and the four blocking plates (58) are respectively slidably connected in pairs to the inside of the two annular grooves (59), and the four blocking plates (58) are respectively fixedly connected in pairs to the opposite side walls of the sealing tube (41).

3. A reaction kettle for producing negative electrode materials for lithium-ion batteries according to claim 2, characterized in that: A sealing gasket (57) is provided between each of the blocking plates (58) and the sealing cylinder (41), and each of the sealing gaskets (57) is fixedly connected to an end of the butt joint pipe (54) away from the annular through pipe (55).

4. A reaction kettle for producing negative electrode materials for lithium-ion batteries according to claim 3, characterized in that: A connecting plate (37) is fixedly connected between the two outer cylinders (31), and scraping rings (35) are slidably sleeved on the rod walls of the two push rods (32) located outside the outer cylinder (31), and the two scraping rings (35) are fixedly connected to the outer cylinder (31) on the sides away from the scraper (36).

5. A reaction kettle for producing negative electrode materials for lithium-ion batteries according to claim 4, characterized in that: Two symmetrical sealing sleeves (48) are arranged between the two filling plates (47); the adjacent sides of the two sealing sleeves (48) are respectively fixedly connected to the two opposite outer side walls of the sealing cylinder (41); and the distant sides of the two sealing sleeves (48) are both in contact with the inner side wall of the discharge box (4).

6. A reaction kettle for producing negative electrode materials for lithium-ion batteries according to claim 5, characterized in that: A plurality of evenly distributed auxiliary stirring blades (21) are fixedly connected to the outer side wall of each main stirring rod (2).

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