A lithium battery negative electrode slurry stirring device

Abstract

The lithium battery negative electrode slurry stirring device provided by the utility model has the advantages that the stirring tank unit can uniformly stir the negative electrode slurry raw materials, the uniformity of the negative electrode slurry is improved, the mixing efficiency of the negative electrode slurry raw materials is improved, the material guiding assembly can conveniently add the negative electrode slurry raw materials, effectively avoids the problems of splashing and leakage during the adding process, the material guiding assembly can also conveniently discharge the negative electrode slurry after stirring, and the negative electrode slurry is prevented from remaining in the stirring tank unit.

Description

Technical Field

[0001] This utility model belongs to the field of lithium battery production technology. Specifically, this utility model relates to a lithium battery negative electrode slurry stirring device. Background Technology

[0002] In the manufacturing process of lithium batteries, the preparation of negative electrode slurry is one of the key steps. Negative electrode slurry is usually composed of negative electrode active materials, conductive agents, binders, etc. These components need to be fully mixed during the stirring process to ensure the uniformity and stability of the negative electrode slurry. Traditional stirring devices can only simply stir the slurry inside the container to mix it, resulting in poor uniformity of the negative electrode slurry, low stirring and mixing efficiency, and inconvenient discharge of the stirred negative electrode slurry. The discharge efficiency is low, and it is also inconvenient to add negative electrode slurry raw materials, as they are prone to splashing and leakage during the addition process.

[0003] To address the aforementioned issues, patent application number 2020107144697 discloses a negative electrode slurry, its preparation method, and the mixing tank used therein. The method involves adding a conductive agent during the addition of the negative electrode active material to the mixing tank to obtain a mixed powder. Then, a colloid and a solvent are added sequentially via spraying, followed by the addition of an emulsion to obtain the negative electrode slurry. In the preparation method described in this invention, the conductive agent is added during the addition of the negative electrode active material to the mixing tank, allowing the powder to be pre-fried, mixed, and dispersed. The colloid is then added via spraying, causing the powder in the mixing tank to be wetted and settle at the bottom of the mixing tank, reducing powder floating or adhering to the inner wall of the mixing tank and the upper layer of the mixing paddle. However, this method fails to solve the aforementioned problems.

[0004] Therefore, in order to improve or solve at least one of the above problems, a lithium battery negative electrode slurry stirring device is provided that can improve the uniformity of the negative electrode slurry, improve the mixing efficiency, facilitate the addition of negative electrode slurry raw materials and facilitate the discharge of the stirred negative electrode slurry, and avoid splashing and leakage during the addition process. Utility Model Content

[0005] This utility model is designed to solve the aforementioned problems. Its purpose is to provide a lithium battery negative electrode slurry stirring device that improves the uniformity of the negative electrode slurry, increases mixing efficiency, facilitates the addition of negative electrode slurry raw materials and the discharge of the stirred negative electrode slurry, and avoids splashing and leakage during the addition process. To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a lithium battery negative electrode slurry mixing device, which includes a support base and a mixing tank unit disposed on the support base, and the mixing tank unit is connected to a material guiding component.

[0007] The lithium battery negative electrode slurry mixing device provided by this utility model may also have the following feature: the material guiding component includes a material guiding funnel and a material guiding pipe connected to the material guiding funnel, and the material guiding pipe is connected to the mixing tank unit.

[0008] The lithium battery negative electrode slurry mixing device provided by this utility model may also have the following features: the material guiding assembly further includes a support frame, a material guiding motor and an auger. The support frame is set on the material guiding funnel, the material guiding motor is set on the support frame, and the auger is connected to the material guiding motor and located inside the material guiding pipe.

[0009] The lithium battery negative electrode slurry mixing device provided by this utility model may also have the following feature: a material guide valve is provided inside the material guide pipe.

[0010] The lithium battery negative electrode slurry mixing device provided by this utility model may also have the following features: the support base includes a base plate and a support plate disposed on the base plate, and a stirring drive motor is provided on the support plate, which is connected to the mixing tank unit.

[0011] The lithium battery negative electrode slurry mixing device provided by this utility model may also have the following features: the mixing tank unit includes a mixing tank body and a pushing component disposed on the mixing tank body. The mixing tank body is provided with an inlet and outlet, which are connected to a guide pipe.

[0012] The lithium battery negative electrode slurry mixing device provided by this utility model may also have the following features: rotating rods are provided on both sides of the mixing tank body, and connecting holes are provided on the support plate. The rotating rods pass through the connecting holes and are connected to the mixing drive motor.

[0013] The lithium battery negative electrode slurry mixing device provided by this utility model may also have the following features: the bottom of the mixing tank body is provided with a piston hole, the pushing assembly includes a piston plate, a connecting rod, a connecting plate and an electric push rod, the piston plate is movably disposed in the mixing tank body, one end of the connecting rod is connected to the piston plate, the other end of the connecting rod passes through the piston hole and is connected to the connecting plate, the connecting plate is connected to the electric push rod, and the electric push rod is disposed on the mixing tank body.

[0014] The lithium battery negative electrode slurry mixing device provided by this utility model may also have the following feature: the top of the mixing tank body is provided with a material guiding slope.

[0015] The technical effects of this utility model are as follows: The lithium battery negative electrode slurry stirring device provided by this utility model includes a support base and a stirring tank unit set on the support base. The stirring tank unit is connected to a material guiding component. The stirring tank unit can stir the negative electrode slurry raw materials evenly, improve the uniformity of the negative electrode slurry, and improve the mixing efficiency of the negative electrode slurry raw materials. The material guiding component can easily add the negative electrode slurry raw materials, effectively avoiding the problems of splashing and leakage during the addition process. The material guiding component can also easily discharge the stirred negative electrode slurry, avoiding the negative electrode slurry residue in the stirring tank unit.

[0016] Therefore, the lithium battery negative electrode slurry stirring device provided by this utility model can improve the uniformity of the negative electrode slurry, improve the stirring and mixing efficiency, facilitate the addition of negative electrode slurry raw materials and facilitate the discharge of the stirred negative electrode slurry, and avoid the problems of splashing and leakage during the addition process. Attached Figure Description

[0017] This manual includes the following figures, which illustrate the following:

[0018] Figure 1 This is a schematic diagram of the structure of the lithium battery negative electrode slurry stirring device in an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the material guiding assembly in an embodiment of this utility model. Figure 1 ;

[0020] Figure 3 This is a schematic diagram of the material guiding assembly in an embodiment of this utility model. Figure 2 ;

[0021] Figure 4 This is a schematic diagram of the support base in an embodiment of this utility model;

[0022] Figure 5 This is an exploded view of the mixing tank unit in an embodiment of this utility model.

[0023] The components are marked as follows: support base-10, bottom plate-11, support plate-12, connecting hole-121, stirring drive motor-13, stirring tank unit-20, stirring tank body-21, piston hole-211, material guide ramp-212, material pusher assembly-22, piston plate-221, connecting rod-222, connecting plate-223, electric push rod-224, inlet / outlet-23, rotating rod-24, material guide assembly-30, material guide funnel-31, material guide pipe-32, support frame-33, material guide motor-34, auger-35, material guide valve-36. Detailed Implementation

[0024] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0025] Figure 1 This is a schematic diagram of the structure of the lithium battery negative electrode slurry stirring device in an embodiment of this utility model.

[0026] like Figure 1 As shown, the lithium battery negative electrode slurry mixing device provided by this utility model includes a support base 10 and a mixing tank unit 20 disposed on the support base 10. The mixing tank unit 20 is connected to a material guiding component 30. The mixing tank unit 20 can mix the negative electrode slurry raw materials evenly, improve the uniformity of the negative electrode slurry, and improve the mixing efficiency of the negative electrode slurry raw materials. The material guiding component 30 can conveniently add the negative electrode slurry raw materials, effectively avoiding splashing and leakage during the addition process. The material guiding component 30 can also conveniently discharge the mixed negative electrode slurry, preventing the negative electrode slurry from remaining in the mixing tank unit. The lithium battery negative electrode slurry mixing device provided by this utility model can conveniently complete the mixing process of the negative electrode slurry, improve work and production efficiency, and help reduce production costs.

[0027] Figure 2 This is a schematic diagram of the material guiding assembly in an embodiment of this utility model. Figure 1 ; Figure 3 This is a schematic diagram of the material guiding assembly in an embodiment of this utility model. Figure 2 .

[0028] like Figure 2 and Figure 3 As shown, the material guiding assembly 30 includes a material guiding funnel 31 and a material guiding pipe 32. One end of the material guiding pipe 32 is connected to the bottom of the material guiding funnel 31, and the other end of the material guiding pipe 32 is connected to the mixing tank unit 20. When slurry needs to be added, the negative electrode slurry raw material to be mixed is added to the material guiding funnel 31. Through the cooperation of the material guiding funnel 31 and the material guiding pipe 32, the negative electrode slurry raw material is guided to be transported to the interior of the mixing tank unit 20, effectively avoiding splashing and leakage during the addition process.

[0029] like Figure 2 and Figure 3 As shown, the material guiding assembly 30 also includes a support frame 33, a material guiding motor 34, and an auger 35. The support frame 33 is mounted on the material guiding hopper 31, and the material guiding motor 34 is mounted on the support frame 33, located above the material guiding pipe 32. The auger 35 is connected to the motor shaft of the material guiding motor 34. The auger 35 is rotatably located inside the material guiding pipe 32. The material guiding motor 34 drives the auger 34 to rotate, which can further facilitate the addition of negative electrode slurry raw materials and the discharge of negative electrode slurry.

[0030] like Figure 2 and Figure 3 As shown, a feed valve 36 is provided inside the feed pipe 32. The feed valve 36 can control the opening or closing of the feed pipe 32. During the process of adding negative electrode slurry raw materials or discharging negative electrode slurry, the feed valve 36 is in the open state, and the feed pipe 32 can flow with negative electrode slurry raw materials and negative electrode slurry. During the stirring process, the feed valve 36 is in the closed state, and the feed pipe 32 is in a closed state, preventing flow and avoiding leakage of negative electrode slurry during the stirring process, thus improving the reliability of the structure.

[0031] Figure 4 This is a schematic diagram of the support base in an embodiment of this utility model.

[0032] like Figure 4 As shown, the support base 10 includes a base plate 11 and a support plate 12 disposed on the base plate 11. A stirring drive motor 13 is disposed on the support plate 12. The stirring drive motor 13 is connected to the stirring tank unit 20, so that the stirring drive motor 13 can drive the stirring tank unit 20 to shake and flip, mix and stir the negative electrode slurry, improve the uniformity of the negative electrode slurry, and improve the mixing efficiency of the negative electrode slurry raw materials.

[0033] Figure 5 This is an exploded view of the mixing tank unit in an embodiment of this utility model.

[0034] like Figure 5 As shown, the mixing tank unit 20 includes a mixing tank body 21 and a pushing assembly 22 disposed on the mixing tank body 21. The mixing tank body 21 is provided with an inlet / outlet 23, which is connected to a guide pipe 32. Rotating rods 24 are provided on both sides of the mixing tank body 21. A connecting hole 121 is provided on the support plate 12. The rotating rods 24 pass through the connecting hole 121 and are connected to the stirring drive motor 13. A bearing seat is provided between the rotating rods 24 and the connecting hole 121, which can reduce frictional resistance and enable the stirring drive motor 13 to drive the mixing tank body 21 to rotate, thereby improving the reliability of the structure.

[0035] like Figure 5As shown, the bottom of the mixing tank body 21 is provided with a piston hole 211. The pushing assembly 22 includes a piston plate 221, a connecting rod 222, a connecting plate 223, and an electric push rod 224. The piston plate 221 is movably disposed inside the mixing tank body 21 and is adapted to the inner wall of the mixing tank body 21. A sealing ring is sleeved on the edge of the piston plate 221 and is located between the piston plate 221 and the inner wall of the mixing tank body 21. One end of the connecting rod 222 is connected to the piston plate 221, and the other end of the connecting rod 222 passes through the piston hole 211 and is connected to the connecting plate 223. An enhanced sealing ring is provided between the connecting rod 222 and the piston hole 211 to further improve the sealing performance and prevent leakage of the negative electrode slurry. The connecting plate 223 is connected to the telescopic end of the electric push rod 224. The electric push rod 224 is disposed on the mixing tank body 21, so that the electric push rod 224 can drive the piston plate 221 to slide along the inner wall of the mixing tank body 21, which facilitates the discharge of the mixed negative electrode slurry.

[0036] like Figure 5 As shown, the top of the mixing tank body 21 is provided with a guide ramp 212, which makes the top of the mixing tank body 21 conical, further facilitating the discharge of the mixed negative electrode slurry.

[0037] When adding negative electrode slurry raw materials, the feeding motor 34 starts, the auger 35 rotates, and the feeding valve 36 is in the open state, so that the negative electrode slurry raw materials to be mixed are added into the feeding funnel 31. Through the cooperation of the feeding funnel 31 and the feeding pipe 32, the negative electrode slurry raw materials are guided to be transported into the mixing tank body 21 through the inlet and outlet 23, thus completing the feeding process of the negative electrode slurry raw materials.

[0038] During the mixing process, the feed motor 34 does not work, the auger 35 does not rotate, the feed valve 36 is in the closed state, the electric push rod 224 is in the extended state, the piston plate 221 is located at the bottom of the mixing tank body 21, and the mixing drive motor 13 can drive the mixing tank unit 20 to shake and flip, mix and stir the negative electrode slurry, improve the uniformity of the negative electrode slurry, and improve the mixing efficiency of the negative electrode slurry raw materials.

[0039] After mixing, the negative electrode slurry needs to be discharged. When adding negative electrode slurry raw materials, the feed motor 34 starts, the auger 35 rotates, the feed valve 36 is in the open state, and the mixing drive motor 13 drives the mixing tank body 21 to rotate, so that the inlet and outlet 23 tilts downward. The electric push rod 224 gradually retracts, driving the piston plate 221 to move towards the inlet and outlet 23, thereby pushing out the negative electrode slurry in the mixing tank body 21. The auger 35 can guide the negative electrode slurry and improve the discharge efficiency.

[0040] The role and effect of the embodiments

[0041] The lithium battery negative electrode slurry mixing device provided by this utility model includes a support base 10 and a mixing tank unit 20 disposed on the support base 10. The mixing tank unit 20 is connected to a material guiding component 30. The mixing tank unit 20 can mix the negative electrode slurry raw materials evenly, improve the uniformity of the negative electrode slurry, and improve the mixing efficiency of the negative electrode slurry raw materials. The material guiding component 30 can conveniently add the negative electrode slurry raw materials, effectively avoiding splashing and leakage during the addition process. The material guiding component 30 can also conveniently discharge the mixed negative electrode slurry, preventing the negative electrode slurry from remaining in the mixing tank unit. The lithium battery negative electrode slurry mixing device provided by this utility model can conveniently complete the mixing process of the negative electrode slurry, improve work and production efficiency, and help reduce production costs.

[0042] When adding negative electrode slurry raw materials, the feeding motor 34 starts, the auger 35 rotates, and the feeding valve 36 is in the open state, so that the negative electrode slurry raw materials to be mixed are added into the feeding funnel 31. Through the cooperation of the feeding funnel 31 and the feeding pipe 32, the negative electrode slurry raw materials are guided to be transported into the mixing tank body 21 through the inlet and outlet 23, thus completing the feeding process of the negative electrode slurry raw materials.

[0043] During the mixing process, the feed motor 34 does not work, the auger 35 does not rotate, the feed valve 36 is in the closed state, the electric push rod 224 is in the extended state, the piston plate 221 is located at the bottom of the mixing tank body 21, and the mixing drive motor 13 can drive the mixing tank unit 20 to shake and flip, mix and stir the negative electrode slurry, improve the uniformity of the negative electrode slurry, and improve the mixing efficiency of the negative electrode slurry raw materials.

[0044] After mixing, the negative electrode slurry needs to be discharged. When adding negative electrode slurry raw materials, the feed motor 34 starts, the auger 35 rotates, the feed valve 36 is in the open state, and the mixing drive motor 13 drives the mixing tank body 21 to rotate, so that the inlet and outlet 23 tilts downward. The electric push rod 224 gradually retracts, driving the piston plate 221 to move towards the inlet and outlet 23, thereby pushing out the negative electrode slurry in the mixing tank body 21. The auger 35 can guide the negative electrode slurry and improve the discharge efficiency.

[0045] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A stirring device for lithium battery negative electrode slurry, characterized in that, The system includes a support base (10) and a mixing tank unit (20) disposed on the support base (10). The mixing tank unit (20) is connected to a material guiding assembly (30). The material guiding assembly (30) includes a material guiding funnel (31) and a material guiding pipe (32) connected to the material guiding funnel (31). The material guiding pipe (32) is connected to the mixing tank unit (20). The material guiding assembly (30) also includes a support frame (33), a material guiding motor (34), and an auger (35). The support frame (33) is disposed on the material guiding funnel (31), the material guiding motor (34) is disposed on the support frame (33), and the auger (35) is connected to the material guiding motor (34) and located inside the material guiding pipe (32).

2. The lithium battery negative electrode slurry stirring device according to claim 1, characterized in that, The feed pipe (32) is equipped with a feed valve.

3. The lithium battery negative electrode slurry stirring device according to claim 2, characterized in that, The support base (10) includes a base plate (11) and a support plate (12) disposed on the base plate (11). A stirring drive motor (13) is provided on the support plate (12), and the stirring drive motor (13) is connected to the stirring tank unit (20).

4. The lithium battery negative electrode slurry stirring device according to claim 3, characterized in that, The mixing tank unit (20) includes a mixing tank body (21) and a pusher assembly (22) disposed on the mixing tank body (21). The mixing tank body (21) is provided with an inlet and outlet (23), which is connected to the guide pipe (32).

5. The lithium battery negative electrode slurry stirring device according to claim 4, characterized in that, Rotating rods (24) are provided on both sides of the mixing tank body (21), and connecting holes (121) are provided on the support plate (12). The rotating rods (24) pass through the connecting holes (121) and are connected to the stirring drive motor (13).

6. The lithium battery negative electrode slurry stirring device according to claim 5, characterized in that, The bottom of the mixing tank body (21) is provided with a piston hole (211). The pushing assembly (22) includes a piston plate (221), a connecting rod (222), a connecting plate (223), and an electric push rod (224). The piston plate (221) is movably disposed inside the mixing tank body (21). One end of the connecting rod (222) is connected to the piston plate (221), and the other end of the connecting rod (222) passes through the piston hole (211) and is connected to the connecting plate (223). The connecting plate (223) is connected to the electric push rod (224), and the electric push rod (224) is disposed on the mixing tank body (21).

7. The lithium battery negative electrode slurry stirring device according to claim 6, characterized in that, The top of the mixing tank body (21) is provided with a material guide ramp (212).

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