Mixing device for producing negative electrode material of lithium battery
By adopting a splined connection and gear transmission stirrer design in the lithium battery anode material production device, the problems of uneven mixing and uneven discharge at low material levels are solved, achieving efficient mixing and simple maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUILIN UNIV OF AEROSPACE TECH
- Filing Date
- 2025-05-23
- Publication Date
- 2026-05-22
AI Technical Summary
In existing lithium battery anode material production equipment, the upper agitator cannot effectively participate in mixing when the material level is low, resulting in uneven mixing. Furthermore, traditional discharge components are prone to clogging or uneven flow.
The upper agitator and screw, along with the gear transmission mechanism, are connected by a spline. The smooth rod provides a sliding guide, ensuring that the upper agitator moves down and immerses itself in the material layer. The screw shaft with a three-way structure enables quantitative discharge, avoiding blockage.
It enables the effective participation of the agitator at low material levels, improves the uniformity of mixing, and solves the clogging problem through threaded connection and T-junction structure, simplifying operation and maintenance.
Smart Images
Figure CN224265741U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lithium battery anode material manufacturing technology, specifically to a mixing device for lithium battery anode material production. Background Technology
[0002] Lithium-ion batteries, as a new type of recyclable green energy, have advantages such as high operating voltage, high specific energy, long cycle life, wide operating range, good safety performance, and no memory effect. In recent years, they have been widely used in many fields and have developed very rapidly. However, when producing lithium battery anode materials, a mixing operation is required first, that is, the raw materials are put into a mixing tank and stirred.
[0003] The patent document with publication number CN112774524A discloses a pulp mixing device for easy cleaning and environmentally friendly paper processing. The technical solution uses two vertically arranged mixing blades in the main body of the mixing device to mix the material. When there is little material in the main body of the mixing device, the upper mixing blade cannot effectively participate in the mixing of the material.
[0004] The patent document with publication number CN221558135U discloses a mixing device for producing lithium battery anode materials. In this technical solution, two stirring units arranged vertically are set in a stirring tank to stir the lithium battery anode materials. However, the problem remains that when there is a small amount of lithium battery anode material in the stirring tank, the upper stirring unit cannot effectively participate in the stirring. Utility Model Content
[0005] The main purpose of this invention is to provide a mixing device that can adjust the height of the upper stirrer, enabling the upper stirrer to effectively stir the lithium battery negative electrode material in the tank when there is little lithium battery negative electrode material in the tank.
[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:
[0007] A mixing device for producing lithium battery anode materials includes a tank, with a feed pipe fixedly connected to the upper end of the tank. A power assembly is installed at the upper end of the tank. A stirring rod is concentrically rotated inside the tank. The power assembly is connected to the stirring rod. Two agitators are sleeved on the outside of the stirring rod, one above the other. The lower agitator is fixedly connected to the stirring rod, and the upper agitator is splinedly connected to the stirring rod. The upper agitator can slide along the axial direction of the stirring rod. A smooth rod is fixed to the lower agitator, passing through the upper agitator and slidably connected to it. A screw is rotatably connected to the lower agitator, passing through the upper agitator and threadedly connected to it. A drive unit is installed at the upper end of the tank, capable of driving the screw to rotate. The drive unit can rotate with the stirring rod. A discharge assembly is fixedly connected to the lower end of the tank.
[0008] Specifically, the tank body is fixed with support legs on the outside.
[0009] Specifically, the power assembly includes a reducer fixed to the upper end of the tank, an upper motor fixed to the upper end of the reducer, the main shaft of the upper motor being concentrically and fixedly connected to the input shaft of the reducer, the output shaft of the reducer being fixedly connected to the upper end of the stirring rod via a coupling, and a drive unit being rotatably sleeved on the outside of the output shaft of the reducer, with the upper end of the drive unit protruding above the tank.
[0010] Specifically, the drive unit includes a gear ring rotatably sleeved on the outside of the output shaft of the reducer, a bushing concentrically fixed at the upper end of the gear ring, the upper end of the bushing protruding above the tank body, and a gear concentrically fixed at the upper end of the screw, the gear meshing with the gear ring.
[0011] Specifically, both the gear ring and the bushing are rotatably connected to the output shaft of the reducer via bearings.
[0012] Specifically, the upper end of the tank is concentrically perforated, through which the bushing and the output shaft of the reducer pass.
[0013] Specifically, the upper end of the bushing is provided with flat grooves around all four sides.
[0014] Specifically, the discharge assembly includes a tee, the first end of which is fixedly connected to the lower end of the tank, the second and third ends of which are concentric, and the axes of the second and third ends of which are parallel to the horizontal plane. A valve is threadedly connected to the second end of the tee, and a threaded sleeve is threadedly connected to the third end of the tee. A lower motor is concentrically fixed to one end of the threaded sleeve, and a helical shaft is concentrically fixed to the main shaft of the lower motor. The helical shaft is located inside the second and third ends of the tee.
[0015] Specifically, a retaining ring is threaded onto the third end of the tee, and the retaining ring limits the movement of the threaded sleeve.
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0017] 1. The upper agitator, connected by a spline, is combined with a screw and gear transmission mechanism. This allows the upper agitator to be lowered when the material level is low, ensuring it is fully immersed in the material layer. This solves the problem of ineffective upper agitation in traditional double-layer agitators at low material levels, improving mixing uniformity. The smooth rod provides sliding guidance to prevent agitator misalignment; the precision thread drive of the screw enables accurate height adjustment.
[0018] 2. The drive unit and the stirring rod adopt a nested separate design. The screw rotation can be controlled by operating the bushing groove with an external wrench, so as to adjust the position of the stirrer. The operation is simple.
[0019] 3. The discharge assembly adopts a three-way structure, achieving quantitative and controllable discharge of materials through the rotation of the screw shaft, avoiding the blockage or uneven flow problems caused by direct discharge from traditional valves, and is especially suitable for high-viscosity negative electrode slurries. The threaded connection sleeve facilitates quick disassembly and maintenance.
[0020] 4. The second and third ends of the tee can be disassembled independently, making it easier to unclog the tee when blockage occurs, thus reducing maintenance costs. Attached Figure Description
[0021] Figure 1 This is a front view of the present invention.
[0022] Figure 2 for Figure 1 Sectional view along the AA direction.
[0023] Figure 3 for Figure 2 A magnified view of region B in the middle.
[0024] Figure 4 This is a schematic diagram of the internal structure of the tank.
[0025] Figure 5 This is a bottom view of the connection between the gear ring and the bushing.
[0026] Figure 6 This is a top view of the bushing.
[0027] Figure 7 This is a schematic diagram showing the separation of the threaded sleeve from the third end of the tee.
[0028] The components in the attached diagram are named as follows: 1. Tank body, 2. Support leg, 3. Discharge assembly, 4. Feed pipe, 5. Reducer, 6. Upper motor, 7. Agitator, 8. Agitator rod, 9. Coupling, 10. Smooth rod, 11. Screw, 12. Gear, 13. Gear ring, 14. Bushing, 15. Bearing, 16. Output shaft, 17. Flat groove, 301. T-joint, 302. Valve, 303. Retaining ring, 304. Spiral shaft, 305. Lower motor, 306. Screw sleeve. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0030] Example 1: Refer to Figures 1-6 As shown, a mixing device for producing lithium battery negative electrode materials includes a tank 1 with support legs 2 fixed to the outside of the tank 1. A feed pipe 4 is fixedly connected to the upper end of the tank 1, and a power assembly is provided at the upper end of the tank 1. A stirring rod 8 is concentrically rotatably arranged inside the tank 1, and the power assembly is connected to the stirring rod 8.
[0031] The power assembly includes a reducer 5 fixed to the upper end of the tank 1, an upper motor 6 fixed to the upper end of the reducer 5, the main shaft of the upper motor 6 being concentrically and fixedly connected to the input shaft of the reducer 5, and the output shaft 16 of the reducer 5 being fixedly connected to the upper end of the stirring rod 8 via a coupling 9.
[0032] Two agitators 7 are mounted on the outside of the stirring rod 8, one above the other. The lower agitator 7 is fixedly connected to the stirring rod 8, and the upper agitator 7 is splinedly connected to the stirring rod 8. The upper agitator 7 can slide along the axial direction of the stirring rod 8. A smooth rod 10 is fixed on the lower agitator 7, and the smooth rod 10 passes through the upper agitator 7. The smooth rod 10 and the upper agitator 7 are slidably connected. A screw 11 is rotatably connected to the lower agitator 7, and the screw 11 passes through the upper agitator 7. The screw 11 and the upper agitator 7 are threadedly connected. A drive unit capable of driving the screw 11 to rotate is provided at the upper end of the tank body 1. The drive unit can rotate with the stirring rod 8. The drive unit is rotatably mounted on the outside of the output shaft 16 of the reducer 5, and the upper end of the drive unit protrudes to the top of the tank body 1.
[0033] The drive unit includes a gear ring 13 rotatably sleeved on the outside of the output shaft 16 of the reducer 5. A bushing 14 is concentrically fixed to the upper end of the gear ring 13, and flat grooves 17 are formed around the upper end of the bushing 14. The upper end of the bushing 14 protrudes above the tank body 1. A gear 12 is concentrically fixed to the upper end of the screw 11, and the gear 12 meshes with the gear ring 13. Both the gear ring 13 and the bushing 14 are rotatably connected to the output shaft 16 of the reducer 5 through bearings 15.
[0034] The upper end of the tank body 1 has a concentric perforation through which the bushing 14 and the output shaft 16 of the reducer 5 pass.
[0035] Materials for preparing lithium battery anodes can be added to tank 1 through feed pipe 4. When it is necessary to stir the materials for preparing lithium battery anodes in tank 1, the upper motor 6 is started. The upper motor 6 causes the stirring rod 8 and the agitator 7 to rotate through the reducer 5 and coupling 9. The agitator 7 can stir the materials for preparing lithium battery anodes in tank 1. When the stirring rod 8 and the agitator 7 rotate, the drive unit, gear ring 13, screw 11 and guide rod 10 rotate accordingly.
[0036] When the amount of material for preparing the lithium battery negative electrode in the tank 1 is small, the output shaft 16 of the reducer 5 is stopped from rotating, so that the wrench holds the upper end of the bushing 14 relative to the part between the two flat grooves 17. When the bushing 14 rotates, the gear ring 13 rotates. When the gear ring 13 rotates, the screw 11 rotates through the gear 12. When the screw 11 rotates, the upper agitator 7 can move in the axial direction of the stirring rod 8. Adjust the rotation direction of the bushing 14 so that the upper agitator 7 moves downward, thereby ensuring that the upper agitator 7 can be submerged in the material for preparing the lithium battery negative electrode in the tank 1, so that the upper agitator 7 can effectively participate in the stirring of the material for preparing the lithium battery negative electrode in the tank 1.
[0037] Example 2: Based on Example 1, referring to... Figure 2 , Figure 4 and Figure 7 As shown, a discharge assembly 3 is fixedly connected to the lower end of the tank body 1.
[0038] The discharge assembly 3 includes a tee 301. The first end of the tee 301 is fixedly connected to the lower end of the tank 1. The second and third ends of the tee 301 are concentric. The axis of the second and third ends of the tee 301 is parallel to the horizontal plane. A valve 302 is threadedly connected to the second end of the tee 301. A threaded sleeve 306 is threadedly connected to the third end of the tee 301. A lower motor 305 is concentrically fixed to one end of the threaded sleeve 306. A spiral shaft 304 is concentrically fixed to the main shaft of the lower motor 305. The spiral shaft 304 is located inside the second and third ends of the tee 301.
[0039] A retaining ring 303 is threaded onto the third end of the tee 301, which limits the movement of the threaded sleeve 306.
[0040] During material discharge, valve 302 is opened and lower motor 305 is started. Lower motor 305 drives screw shaft 304 to rotate. During the rotation of screw shaft 304, the material for preparing lithium battery negative electrode that has entered the three-way valve 301 can be discharged quantitatively.
[0041] When it is necessary to unclog the tee 301, remove the threaded sleeve 306 from the third end of the tee 301 and remove the valve 302 from the second end of the tee 301 to facilitate unclogging the tee 301.
[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A mixing device for producing lithium battery negative electrode materials, comprising a tank (1), a feed pipe (4) fixedly connected to the upper end of the tank (1), a power assembly provided at the upper end of the tank (1), and a stirring rod (8) concentrically rotatably arranged inside the tank (1), the power assembly being connected to the stirring rod (8), characterized in that, Two agitators (7) are mounted on the outside of the stirring rod (8), one above the other. The lower agitator (7) is fixedly connected to the stirring rod (8), and the upper agitator (7) is splined to the stirring rod (8). The upper agitator (7) can slide along the axial direction of the stirring rod (8). A smooth rod (10) is fixed on the lower agitator (7). The smooth rod (10) passes through the upper agitator (7) and is slidably connected to the upper agitator (7). A screw (11) is rotatably connected to the lower agitator (7). The screw (11) passes through the upper agitator (7) and is threadedly connected to the upper agitator (7). A drive unit capable of driving the screw (11) to rotate is provided at the upper end of the tank (1). The drive unit can rotate with the stirring rod (8). A discharge assembly (3) is fixedly connected to the lower end of the tank (1).
2. The mixing device for producing lithium battery anode materials according to claim 1, characterized in that, The tank body (1) is fixed with support legs (2) on the outside.
3. The mixing device for producing lithium battery anode materials according to claim 1, characterized in that, The power assembly includes a reducer (5) fixed to the upper end of the tank (1), an upper motor (6) fixed to the upper end of the reducer (5), the main shaft of the upper motor (6) being concentrically and fixedly connected to the input shaft of the reducer (5), the output shaft (16) of the reducer (5) being fixedly connected to the upper end of the stirring rod (8) through a coupling (9), and the drive unit being rotatably sleeved on the outside of the output shaft (16) of the reducer (5), with the upper end of the drive unit protruding above the tank (1).
4. The mixing device for producing lithium battery anode materials according to claim 3, characterized in that, The drive unit includes a gear ring (13) rotatably sleeved on the outside of the output shaft (16) of the reducer (5), a bushing (14) is concentrically fixed at the upper end of the gear ring (13), the upper end of the bushing (14) protrudes above the tank body (1), and a gear (12) is concentrically fixed at the upper end of the screw (11), the gear (12) meshes with the gear ring (13).
5. The mixing device for producing lithium battery anode materials according to claim 4, characterized in that, Both the gear ring (13) and the bushing (14) are rotatably connected to the output shaft (16) of the reducer (5) via bearings (15).
6. The mixing device for producing lithium battery anode materials according to claim 3, characterized in that, The upper end of the tank (1) is concentrically perforated, and the bushing (14) and the output shaft (16) of the reducer (5) pass through the perforation.
7. The mixing device for producing lithium battery anode materials according to claim 4, characterized in that, The bushing (14) has flat grooves (17) on all four sides of its upper end.
8. The mixing device for producing lithium battery anode materials according to claim 1, characterized in that, The discharge assembly (3) includes a tee (301). The first end of the tee (301) is fixedly connected to the lower end of the tank (1). The second and third ends of the tee (301) are concentric. The axis of the second and third ends of the tee (301) is parallel to the horizontal plane. A valve (302) is threadedly connected to the second end of the tee (301). A threaded sleeve (306) is threadedly connected to the third end of the tee (301). A lower motor (305) is concentrically fixed to one end of the threaded sleeve (306). A spiral shaft (304) is concentrically fixed to the main shaft of the lower motor (305). The spiral shaft (304) is located inside the second and third ends of the tee (301).
9. The mixing device for producing lithium battery anode materials according to claim 8, characterized in that, A retaining ring (303) is threaded onto the third end of the tee (301), and the retaining ring (303) limits the movement of the threaded sleeve (306).