A homogenizing device for lithium battery negative electrode material

Abstract

This utility model relates to the field of lithium battery production technology, specifically a homogenizing device for lithium battery negative electrode materials. It includes a material tank located below a planetary stirrer, with a circular hole at the center of the bottom of the tank. A connecting shell is fixedly fitted inside the circular hole. A mixing mechanism is located inside the material tank, and the mixing mechanism includes a cylinder. In this utility model, starting a drive motor rotates a transmission belt, causing the connecting shell to move upwards. This creates a negative pressure inside the cylinder, drawing the material from the material tank to below the connecting shell. Then, the added liquid is injected into the upper part of the connecting shell through a feed pipe. Next, the drive motor starts again, driving a turntable to rotate via a toothed roller, aligning the connecting hole on the turntable with the connecting hole on the connecting shell. The connecting shell is then lowered, mixing the liquid above the shell with the material below. After the turntable is reset, the connecting shell is moved upwards, pushing the mixed material out through a spray nozzle into the liquid flow inside the material tank. This pre-mixing of the added liquid before injection into the liquid inside the material tank improves mixing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production technology, specifically a homogenizing device for lithium battery negative electrode material. Background Technology

[0002] The core function of the slurry process in the production of lithium battery anode materials is to uniformly mix active materials (such as graphite, silicon-based materials, etc.), conductive agents (such as carbon black, carbon nanotubes), and binders (such as PVDF) to form a slurry, ensuring the stability of subsequent coating processes and the performance of the finished product. Slurry mixing typically utilizes equipment such as slurry mixers. These mixers usually employ planetary agitators to mix the materials inside the tank, and the height of the agitator is adjusted by the machine body. Often, during the slurry process, it may be necessary to add some additives or liquids to the materials inside the tank. This requires a temporary stop of the machine, and the materials are then added back into the tank for further mixing, resulting in low efficiency. Furthermore, because the planetary agitator mixes the materials by subjecting them to complex movements and strong shearing and kneading within the tank, the added liquids are often added all at once, leading to uneven distribution within the tank. This usually requires a certain amount of time for the planetary agitator to achieve a proper mixing effect with the materials inside the tank, further contributing to the low efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a homogenizing device for lithium battery negative electrode materials to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A lithium battery negative electrode material homogenizing device includes a body, and a planetary stirrer is installed on the body. The planetary stirrer includes a high-speed stirring blade, and a cover is fixedly sleeved on the planetary stirrer. The system includes a material container, a mixing mechanism for pre-mixing liquids added midway through the mixing process, and an adjusting mechanism. The material container is located below the planetary mixer. A circular hole is opened at the center of the bottom of the material container, and a connecting shell is fixedly fitted inside the circular hole. The mixing mechanism is located inside the material container and includes a cylinder with sealed ends. Multiple feed holes are opened at the bottom of the cylinder, and a sleeve is slidably fitted inside the cylinder. A turntable is rotatably fitted inside the sleeve, and multiple connecting holes are opened at the top and bottom of the sleeve and the top surface of the turntable. Multiple spray heads are fixedly connected to the top of the outer wall of the cylinder. An internally threaded cylinder is rotatably connected to the top center of the high-speed mixing paddle, and a screw-in cylinder is fixedly connected to the top of the cylinder. The outer wall of the screw-in cylinder has threads, and the screw-in cylinder is screwed into the internally threaded cylinder. A sleeve is fixedly connected between the cylinder and the connecting shell. The adjusting mechanism is fixedly fitted inside the connecting shell of the material container.

[0005] Furthermore, a connecting cylinder is rotatably connected to the top of the outer wall of the cylinder, and a feed pipe is fixedly connected to the cover. One end of the feed pipe and the inner wall of the connecting cylinder are threaded, and one end of the feed pipe is screwed into the inside of the connecting cylinder.

[0006] Furthermore, one-way valves are installed inside the multiple feed holes at the bottom of the cylinder and at one end of the feed pipe.

[0007] Furthermore, the regulatory mechanism includes: The system consists of two drive wheels and a transmission belt that can move the casing. The two drive wheels are located inside the swivel cylinder and the connecting shell, respectively. The inner walls of the swivel cylinder and the connecting shell are rotatably connected to shafts. Each drive wheel is fixedly sleeved with the adjacent shaft. The transmission belt is rotatably sleeved between the outer walls of the two drive wheels. The transmission belt passes through the connecting shell, the cylinder, and the casing. One side of the transmission belt is fixedly connected to the casing, and the other side is slidably sleeved with the casing. The transmission belt is located inside the casing.

[0008] Furthermore, a motor box is fixedly connected inside the connecting shell, and a drive motor is installed inside the motor box. The motor shaft of the drive motor is fixedly connected to one end of an adjacent rotating shaft.

[0009] Furthermore, a U-shaped plate is fixedly connected to the inner wall of the connecting shell, and a stop plate is slidably sleeved between the two arms of the U-shaped plate. One side of the transmission ring belt passes around the stop plate and one end of the U-shaped plate, and multiple tension springs are fixedly connected between the stop plate and one end of the U-shaped plate.

[0010] Furthermore, a toothed roller is rotatably connected between the top and bottom surfaces of the housing, and multiple toothed blocks are fixedly connected to the inner sidewall of the turntable. The teeth of the toothed roller mesh with the multiple toothed blocks. A drive box is fixedly connected to the bottom surface of the housing, and a drive motor is installed inside the drive box. The motor end of the drive motor is fixedly connected to the end of the toothed roller.

[0011] Compared with the prior art, the beneficial effects of this utility model are: By starting the drive motor and moving the transmission belt, the transmission belt moves the casing upward, creating negative pressure inside the cylinder to draw the material from the tank to the bottom of the casing. Then, the added liquid is injected into the top of the casing through the feed pipe. Next, the drive motor is started again, driving the turntable to rotate via the toothed roller, aligning the connecting hole on the turntable with the connecting hole on the casing. Then, the casing is moved downward, mixing the liquid above the casing with the material below. After the turntable is reset, the casing is moved upward, pushing the mixed material out of the spray nozzle into the liquid flow inside the tank. This process pre-mixes the added liquid before injecting it into the tank, improving mixing efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a homogenizer in existing products; Figure 2 This is a schematic diagram of the overall structure of this utility model; Figure 3 This is a schematic diagram of the high-speed stirring paddle structure of this utility model; Figure 4 This is a schematic diagram showing the positional relationship between the mixing mechanism and the material hopper in this utility model; Figure 5 This is an exploded view of the mixing mechanism structure in this utility model; Figure 6 This is a schematic diagram of the internal structure of the connecting shell and the inner shell of this utility model.

[0013] In the diagram: 100, machine body; 110, cover; 120, high-speed mixing paddle; 121, internal threaded cylinder; 200, material bucket; 210, connecting shell; 211, sleeve; 300, mixing mechanism; 310, cylinder; 311, connecting cylinder; 320, rotating cylinder; 330, feed pipe; 340, shell; 341, turntable; 342, toothed roller; 343, drive box; 400, adjusting mechanism; 410, drive wheel; 411, motor box; 420, transmission belt; 430, U-shaped plate; 440, abutment plate; 441, tension spring. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-6 In this embodiment of the present invention, a lithium battery negative electrode material homogenizing device includes a body 100, and a planetary stirrer is installed on the body 100. The planetary stirrer includes a high-speed stirring paddle 120, and a cover 110 is fixedly sleeved on the planetary stirrer. The system includes a material container 200, a mixing mechanism 300 for pre-mixing liquids added during the mixing process, and an adjusting mechanism 400. The material container 200 is located below the planetary mixer. A circular hole is opened at the center of the bottom of the material container 200, and a connecting shell 210 is fixedly fitted inside the circular hole. The mixing mechanism 300 is located inside the material container 200. The mixing mechanism 300 includes a cylinder 310, which has a sealed structure at both ends. Multiple feed holes are opened at the bottom of the cylinder 310, and a sleeve 340 is slidably fitted inside the cylinder 310. A rotating part is fitted inside the sleeve 340. The turntable 341 and the top and bottom ends of the casing 340 and the top surface of the turntable 341 are provided with multiple connecting holes. Multiple spray heads are fixedly connected to the top of the outer side wall of the cylinder 310. The high-speed stirring paddle 120 is rotatably connected to the center of the top of the internally threaded cylinder 121. The top of the cylinder 310 is fixedly connected to the screw-in cylinder 320. The outer side wall of the screw-in cylinder 320 is provided with threads. The screw-in cylinder 320 is screwed into the inside of the internally threaded cylinder 121. The cylinder 310 and the connecting shell 210 are fixedly connected to the sleeve 211. The adjusting mechanism 400 is fixedly sleeved inside the connecting shell 210 of the material bucket 200.

[0016] Specifically, the machine body 100 is a homogenizer in the prior art. It uses a material container 200 to hold the material, and then uses the machine body 100 to place a planetary mixer inside the material container 200 to mix the material. The planetary mixer includes a high-speed mixing blade 120 at the center and two low-speed mixing blades. The two low-speed mixing blades rotate around the high-speed mixing blade 120 while also rotating on their own axis, while the high-speed mixing blade 120 only rotates on its own axis. This is a typical structure of a planetary mixer. In use, the material container 200 is placed under the planetary mixer, and then the mixing is manually adjusted. Cylinder 320 is screwed into internally threaded cylinder 121. Then, the machine body 100 drives the planetary agitator to enter the material tank 200 to agitate the material. Initially, the connecting hole on the turntable 341 is not aligned with the connecting hole on the sleeve 340, preventing material from passing through the sleeve 340. Then, the sleeve 340 is moved upward to draw the material from inside the material tank 200 into the cylinder 310 through the feed hole. When liquid material needs to be added during the agitation process, the liquid can be added to the cylinder 310, so that the liquid is above the sleeve 340 and drawn into the cylinder. The material inside body 310 is located below shell 340. Then, the turntable 341 is rotated so that the connecting hole on the turntable 341 aligns with the connecting hole on the shell 340, allowing the material below shell 340 to enter above shell 340 through the connecting hole. Then, shell 340 is lowered, causing the material to mix with the liquid above shell 340 through a vortex generated by the connecting hole. After shell 340 moves to the bottom of cylinder 310, the turntable 341 is reset, and then shell 340 is moved upwards, causing shell 340 to push the mixed material and liquid from... Multiple nozzles inject material into the material tank 200. The material ejected from the nozzles lands at a fixed point, and the planetary mixer continuously mixes the material inside the material tank 200. This causes the material inside the material tank 200 to move continuously, allowing the ejected material to land on materials at different locations inside the material tank 200. This results in a more uniform distribution of the ejected material inside the material tank 200, improving the material mixing efficiency. It also allows for the pre-mixing of liquids added midway and their injection into the liquid flow inside the material tank 200, thereby improving the efficiency of material mixing.

[0017] Example 1 like Figure 2-5 As shown, in this embodiment, a connecting cylinder 311 is rotatably connected to the top of the outer side wall of the cylinder 310, and a feed pipe 330 is fixedly connected to the cover 110. One end of the feed pipe 330 and the inner side wall of the connecting cylinder 311 are both threaded, and one end of the feed pipe 330 is screwed into the inside of the connecting cylinder 311. One-way valves are provided inside the multiple feed holes at the bottom of the cylinder 310 and at one end of the feed pipe 330.

[0018] In this embodiment, by screwing the feed pipe 330 into the connecting cylinder 311, the material can be injected into the cylinder 310 through the feed pipe 330. The feed pipe 330 bypasses the two low-speed agitators of the planetary mixer and enters from below the high-speed agitator 120, so that the high-speed agitator 120 and the low-speed agitator do not come into contact with the feed pipe 330 when they rotate. After the material is injected into the cylinder 310 through the feed pipe 330, the material inside the cylinder 310 is not easy to flow back into the feed pipe 330 due to the one-way valve of the feed pipe 330. The material drawn into the cylinder 310 by the movement of the casing 340 is also not easy to flow back into the material tank 200 due to the one-way valve of the feed hole.

[0019] like Figure 4-6 As shown, in this embodiment, the adjustment mechanism 400 includes: Two drive wheels 410 and a transmission belt 420 capable of moving the housing 340 are provided. The two drive wheels 410 are located inside the swivel cylinder 320 and the connecting shell 210, respectively. The inner walls of the swivel cylinder 320 and the connecting shell 210 are rotatably connected to shafts. Each drive wheel 410 is fixedly sleeved with the adjacent shaft. The transmission belt 420 is rotatably sleeved between the outer walls of the two drive wheels 410. The transmission belt 420 passes through the connecting shell 210, the cylinder 310, and the housing 340. One side of the transmission belt 420 is fixedly connected to the housing 340, and the other side is fixedly connected to the housing 340. 340 sliding sleeve, transmission ring belt 420 is located inside sleeve 211, motor box 411 is fixedly connected inside connecting shell 210, and drive motor is installed inside motor box 411. The motor shaft of drive motor is fixedly connected to one end of adjacent rotating shaft. U-shaped plate 430 is fixedly connected to the inner side wall of connecting shell 210, and abutment plate 440 is slidably sleeved between the two arms of U-shaped plate 430. One side of transmission ring belt 420 passes around the area between abutment plate 440 and one end of U-shaped plate 430. Multiple tension springs 441 are fixedly connected between abutment plate 440 and one end of U-shaped plate 430.

[0020] In specific implementation, the transmission belt 420 is made of nylon. Sealing rings are installed at the holes through which the transmission belt 420 passes through the cylinder 310, the sleeve 340, and the connecting shell 210 to prevent material leakage. The surfaces of the two drive wheels 410 are coated with abrasive material to increase friction with the transmission belt 420. The controller starts the drive motor, causing the transmission belt 420 to rotate, allowing it to pull the sleeve 340 within the cylinder 310. Driven by the tension spring 441, the transmission belt 420 is kept taut, which facilitates operation. When the height of the planetary agitator is adjusted by the machine body 100, the planetary agitator will drive the cylinder 310 to move synchronously. Then, the transmission belt 420 pulls the abutment plate 440 to move in coordination with the movement of the planetary agitator. The transmission belt 420 located between the cylinder 310 and the connecting shell 210 can be protected and shielded by the sleeve 411 to prevent the liquid flow inside the material tank 200 from impacting the transmission belt 420.

[0021] Example 2 Based on Embodiment 1, a drive motor is provided to facilitate the adjustment of the rotation angle of turntable 341.

[0022] like Figure 5-6 As shown, in this embodiment, a toothed roller 342 is rotatably connected between the inner top surface and the inner bottom surface of the housing 340, and multiple toothed blocks are fixedly connected to the inner sidewall of the turntable 341. The teeth of the toothed roller 342 mesh with the multiple toothed blocks. A drive box 343 is fixedly connected to the bottom surface of the housing 340, and a drive motor is provided inside the drive box 343. The motor end of the drive motor is fixedly connected to the end of the toothed roller 342.

[0023] In practice, the controller starts the drive motor to drive the toothed roller 342 to rotate, which in turn drives the turntable 341 to rotate, thereby adjusting the angle of the turntable 341 for easy use by the user. The drive box 343 can isolate external liquids to prevent the liquid from coming into contact with the drive motor.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lithium battery negative material homogenizer device, comprising a machine body (100), and the machine body (100) is installed with a planetary stirrer, the planetary stirrer comprises a high-speed stirring paddle (120), and the planetary stirrer is fixedly sleeved with a cover body (110), characterized in that, include: The material bucket (200) is located below the planetary mixer. A circular hole is provided at the center of the bottom end of the material bucket (200), and a connecting shell (210) is fixedly sleeved inside the circular hole. A mixing mechanism (300) is located inside the material barrel (200). The mixing mechanism (300) includes a cylinder (310) with both ends sealed. The bottom end of the cylinder (310) has multiple feed holes. A sleeve (340) is slidably fitted inside the cylinder (310). A turntable (341) is rotatably fitted inside the sleeve (340). Multiple connecting holes are provided at the top and bottom ends of the sleeve (340) and on the top surface of the turntable (341). The cylinder (310) has a hole, and multiple spray heads are fixedly connected to the top of the outer wall. The high-speed stirring paddle (120) is rotatably connected to the center of the top of the internal thread cylinder (121), and a swivel cylinder (320) is fixedly connected to the top of the cylinder (310). The swivel cylinder (320) has threads on its outer wall and is swivelly screwed into the internal thread cylinder (121). A sleeve (211) is fixedly connected between the cylinder (310) and the connecting shell (210). The adjusting mechanism (400) is fixedly sleeved inside the connecting shell (210) of the material bucket (200).

2. The lithium battery negative electrode material homogenizing device according to claim 1, characterized in that, The top of the outer wall of the cylinder (310) is rotatably connected to a connecting cylinder (311), and the cover (110) is fixedly connected to a feed pipe (330). One end of the feed pipe (330) and the inner wall of the connecting cylinder (311) are both threaded, and one end of the feed pipe (330) is screwed into the inside of the connecting cylinder (311).

3. The lithium battery negative electrode material homogenizing device according to claim 2, characterized in that, One-way valves are provided inside the multiple feed holes at the bottom of the cylinder (310) and at one end of the feed pipe (330).

4. The lithium battery negative electrode material homogenizing apparatus according to any one of claims 1-3, characterized in that, A toothed roller (342) is rotatably connected between the inner top surface and the inner bottom surface of the casing (340), and multiple toothed blocks are fixedly connected to the inner side wall of the turntable (341). The teeth of the toothed roller (342) mesh with the multiple toothed blocks. A drive box (343) is fixedly connected to the bottom surface of the casing (340), and a drive motor is provided inside the drive box (343). The motor end of the drive motor is fixedly connected to the end of the toothed roller (342).

5. The lithium battery negative electrode material homogenizing device according to claim 4, characterized in that, The adjustment mechanism (400) includes: Two drive wheels (410) are located inside the swivel cylinder (320) and the connecting shell (210), respectively. The inner walls of the swivel cylinder (320) and the connecting shell (210) are rotatably connected to a rotating shaft, and each drive wheel (410) is fixedly sleeved with the adjacent rotating shaft. The transmission ring belt (420) is rotatably sleeved between the outer walls of the two drive wheels (410). The transmission ring belt (420) passes through the connecting shell (210), the cylinder (310) and the sleeve (340). One side of the transmission ring belt (420) is fixedly connected to the sleeve (340) and the other side is slidably sleeved to the sleeve (340). The transmission ring belt (420) is located inside the sleeve (211).

6. The lithium battery negative electrode material homogenizing device according to claim 5, characterized in that, The connecting shell (210) is fixedly connected to a motor box (411), and a drive motor is provided inside the motor box (411). The motor shaft of the drive motor is fixedly connected to one end of an adjacent rotating shaft.

7. The lithium battery negative electrode material homogenizing device according to claim 6, characterized in that, A U-shaped plate (430) is fixedly connected to the inner wall of the connecting shell (210), and a stop plate (440) is slidably sleeved between the two arms of the U-shaped plate (430). One side of the transmission ring belt (420) passes around the stop plate (440) and one end of the U-shaped plate (430), and multiple tension springs (441) are fixedly connected between the stop plate (440) and one end of the U-shaped plate (430).

Images