Mixing device for negative electrode material of lithium battery

Abstract

The utility model belongs to the technical field of lithium battery materials, and particularly discloses a mixing device for lithium battery cathode materials, which comprises a device frame, a material mixing box is fixedly mounted at the top of the device frame, a box cover is movably mounted at the top of the material mixing box, and a discharge valve is arranged at the bottom end of the material mixing box. A motor is fixedly mounted in the device frame, the output end of the motor is fixedly connected with a driving shaft, a spiral blade is arranged on the outer surface of the driving shaft, and a multiple stirring mechanism is arranged at the top of the driving shaft. According to the mixing device for the negative electrode material of the lithium battery, through multiple stirring mechanisms, a linkage stirring mode is adopted, and through the synergistic effect of multiple elements such as the V-shaped shovel plate, the push plate, the end head frame and the stirring frame, comprehensive mixing of the negative electrode material can be achieved; the problems of non-uniform local density and non-uniform components caused by a traditional single stirring shaft can be effectively avoided.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery materials, and in particular to a mixing device for lithium battery negative electrode materials. Background Art

[0002] Lithium battery negative electrode materials refer to the electrode materials used to absorb and release lithium ions in lithium-ion batteries. They are mainly responsible for storing and releasing lithium ions during the charging and discharging process. Common lithium battery negative electrode materials include graphite, silicon, lithium titanate, etc.

[0003] The lithium battery negative electrode material mixing device is one of the common devices in the field of negative electrode materials. In the process of mixing the negative electrode materials, a stirring shaft is usually used for stirring and mixing. There are certain limitations for stirring and mixing with a single stirring shaft. It is difficult to achieve comprehensive mixing of the materials, which can easily lead to problems such as uneven local density and uneven composition. Utility Model Content

[0004] In view of this, the purpose of the present invention is to solve the shortcomings of the background technology and to propose a mixing device for lithium battery negative electrode materials to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the utility model provides a mixing device for lithium battery negative electrode materials, comprising a device frame, a mixing box is fixedly installed on the top of the device frame, a box cover is movably installed on the top of the mixing box, a discharge valve is provided at the bottom end of the mixing box, a motor is fixedly installed inside the device frame, a drive shaft is fixedly connected to the output end of the motor, a spiral blade is provided on the outer surface of the drive shaft, and a multiple stirring mechanism is provided on the top of the drive shaft.

[0006] Preferably, a bracket is fixedly connected to the inside of the mixing box, and a push barrel is fixedly connected to the top of the bracket. The inner wall of the push barrel contacts the edge of the spiral blade so that the spiral blade can push the negative electrode material up and down normally during rotation.

[0007] Preferably, the multiple stirring mechanisms include an end frame fixedly connected to the top of the driving shaft, and the outer surface of the end frame is fixedly connected to a first connecting frame. Through the multiple stirring mechanisms, the lithium battery negative electrode materials in the mixing box can be synchronously stirred and mixed in a large and small range.

[0008] Preferably, a V-shaped shovel plate is fixedly connected to the bottom of the first connecting frame, and a second connecting frame is fixedly connected to the outer surface of the end frame.

[0009] Preferably, a push plate is fixedly connected to the bottom of the second connecting frame, and an opening is formed on the outer surface of the push plate.

[0010] Preferably, a motor is fixedly mounted on the outer surface of the end frame, and a stirring frame is fixedly connected to the output end of the motor.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The mixing device for negative electrode materials of lithium batteries adopts a linkage stirring method through multiple stirring mechanisms, including the synergistic effect of multiple elements such as a V-shaped shovel plate, a push plate, an end frame and a stirring frame, which can achieve comprehensive mixing of negative electrode materials and can effectively avoid the problems of local density unevenness and uneven composition caused by a traditional single stirring shaft.

[0013] 2. In the mixing device for negative electrode materials of lithium batteries, the spiral blades will push the negative electrode materials as the driving shaft rotates. The negative electrode materials will move up in the pushing barrel as the spiral blades rotate, and finally fall from the top of the pushing barrel, thereby replacing the position of the negative electrode materials at the bottom with the negative electrode materials at the top, achieving a cyclic pushing effect and further improving the mixing uniformity of the materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of this application;

[0015] Figure 2 This is a schematic diagram of the internal structure of the mixing box of this application;

[0016] Figure 3 This is a schematic diagram of the surface structure of the terminal frame of this application;

[0017] Figure 4 This is a schematic diagram of the spiral blade structure of this application.

[0018] Among them: 1. Device frame; 2. Mixing box; 3. Box cover; 4. Discharge valve; 5. Bracket; 6. Push barrel; 7. Motor; 8. Drive shaft; 9. Spiral blade; 10. End frame; 11. First connecting frame; 12. V-shaped shovel plate; 13. Second connecting frame; 14. Push plate; 15. Opening; 16. Motor; 17. Stirring frame. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] See also Figure 1-4A mixing device for lithium battery negative electrode materials includes a device frame 1, a mixing box 2 is fixedly installed on the top of the device frame 1, a box cover 3 is movably installed on the top of the mixing box 2, a discharge valve 4 is arranged at the bottom of the mixing box 2, a motor 7 is fixedly installed inside the device frame 1, a driving shaft 8 is fixedly connected to the output end of the motor 7, a spiral blade 9 is arranged on the outer surface of the driving shaft 8, and a multiple stirring mechanism is arranged on the top of the driving shaft 8.

[0021] Through the above technical solution, when the device is used, the box cover 3 is first opened to put the lithium battery negative electrode material into the mixing box 2, and the motor 7 is turned on to drive the drive shaft 8 to rotate. Under the action of various stirring mechanisms, the negative electrode material can be fully stirred, and the spiral blade 9 and the pushing barrel 6 can push the negative electrode material up and down in a cycle.

[0022] Specifically, a bracket 5 is fixedly connected inside the mixing box 2 , and a pushing cylinder 6 is fixedly connected to the top of the bracket 5 .

[0023] Through the above technical solution, the mixing box 2 below the pushing cylinder 6 is designed to be concave, so as to better push the negative electrode material up and down in a circular manner.

[0024] Specifically, the multiple stirring mechanism includes an end frame 10 fixedly connected to the top of the driving shaft 8 , and a first connecting frame 11 is fixedly connected to the outer surface of the end frame 10 .

[0025] Through the above technical solution, the first connecting frame 11 , the second connecting frame 13 and the stirring frame 17 are relatively evenly distributed on the periphery of the end frame 10 .

[0026] Specifically, a V-shaped shovel plate 12 is fixedly connected to the bottom of the first connecting frame 11 , and a second connecting frame 13 is fixedly connected to the outer surface of the end frame 10 .

[0027] Through the above technical solution, the tip design of the V-shaped shovel plate 12 can better break the path and push forward when pushing the negative electrode material forward.

[0028] Specifically, a push plate 14 is fixedly connected to the bottom of the second connecting frame 13 , and an opening 15 is formed on the outer surface of the push plate 14 .

[0029] Through the above technical solution, the design of the opening 15 can allow the negative electrode material to pass through, dispersing the resistance of the push plate 14 forward, and preventing the push plate 14 from encountering too much resistance in the process of pushing the negative electrode material, thereby affecting the normal rotation of the drive shaft 8.

[0030] Specifically, a motor 16 is fixedly mounted on the outer surface of the end frame 10 , and a stirring frame 17 is fixedly connected to the output end of the motor 16 .

[0031] Through the above technical solution, the stirring frame 17 can stir the negative electrode material in a large range along with the driving shaft 8, and at the same time, the self-rotation of the stirring frame 17 can stir the negative electrode material in a small range.

[0032] Working principle: When the device is mixing the negative electrode material of the lithium battery, it is necessary to first open the box cover 3 and put the negative electrode material into the mixing box 2, and then turn on the motor 7 to drive the drive shaft 8 to rotate. During this process, the end frame 10 will rotate synchronously, and at the same time, the V-shaped shovel plate 12 and the push plate 14 will be linked to push the negative electrode material to stir it evenly. In the process of synchronous rotation with the end frame 10, the stirring frame 17 can also perform a small-scale fine stirring on the negative electrode material in the area where the stirring frame 17 is located under the drive of the motor 16, so that the negative electrode material can be mixed evenly through a variety of stirring methods, that is, a linkage stirring method is adopted, including the synergistic effect of multiple elements such as the V-shaped shovel plate 12, the push plate 14, the end frame 10 and the stirring frame 17, which can achieve comprehensive mixing of the negative electrode material. , which can effectively avoid the problems of local density unevenness and composition unevenness caused by the traditional single stirring shaft. At the same time, during the rotation of the driving shaft 8, it drives the spiral blade 9 to rotate synchronously. During this process, the spiral blade 9 will drive the negative electrode material in the depression in the mixing box 2 to move. The negative electrode material will move up in the pushing barrel 6 with the rotation of the spiral blade 9, and finally fall from the top of the pushing barrel 6, thereby replacing the position of the negative electrode material at the bottom with the negative electrode material at the top, achieving the effect of cyclic pushing. Circular pushing can help to better mix the negative electrode material. By moving the material at the bottom to the top and then falling from the top, the various parts in the mixing process are mixed more evenly, achieving the effect of sufficient mixing. Finally, the negative electrode material after mixing is discharged from the discharge valve 4 for collection.

[0033] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A mixing device for lithium battery negative electrode materials, comprising a device frame (1), characterized in that: A mixing box (2) is fixedly mounted on the top of the device frame (1), a box cover (3) is movably mounted on the top of the mixing box (2), a discharge valve (4) is arranged at the bottom of the mixing box (2), a motor (7) is fixedly mounted inside the device frame (1), a drive shaft (8) is fixedly connected to the output end of the motor (7), a spiral blade (9) is arranged on the outer surface of the drive shaft (8), and a multiple stirring mechanism is arranged on the top of the drive shaft (8).

2. A mixing device for lithium battery negative electrode materials according to claim 1, characterized in that: A bracket (5) is fixedly connected to the interior of the mixing box (2), and a pushing cylinder (6) is fixedly connected to the top of the bracket (5).

3. A mixing device for lithium battery negative electrode materials according to claim 1, characterized in that: The multiple stirring mechanism comprises an end frame (10) fixedly connected to the top of the driving shaft (8), and a first connecting frame (11) is fixedly connected to the outer surface of the end frame (10).

4. A mixing device for lithium battery negative electrode materials according to claim 3, characterized in that: A V-shaped shovel plate (12) is fixedly connected to the bottom of the first connecting frame (11), and a second connecting frame (13) is fixedly connected to the outer surface of the end frame (10).

5. A mixing device for lithium battery negative electrode materials according to claim 4, characterized in that: A push plate (14) is fixedly connected to the bottom of the second connecting frame (13), and an opening (15) is provided on the outer surface of the push plate (14).

6. A mixing device for negative electrode materials of lithium batteries according to claim 3, characterized in that: A motor (16) is fixedly mounted on the outer surface of the end frame (10), and a stirring frame (17) is fixedly connected to the output end of the motor (16).

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