High-temperature carbonization device for preparing negative electrode material

Abstract

The utility model relates to the technical field of cathode material preparation, in particular to a high-temperature carbonization device for cathode material preparation, which comprises a carbonization box, an auxiliary device and a dismounting device, a feed hopper is mounted at one end of the top wall of the carbonization box, an exhaust pipe is mounted at the other end of the top wall of the carbonization box, and a driving motor is mounted in the middle of the top end of the carbonization box. The output end of the driving motor penetrates through the top wall of the carbonization box and extends to the inner cavity of the carbonization box to be provided with a rotating shaft, rotation of mixing blades can turn over materials on the upper layer to the lower layer, meanwhile, materials on the lower layer are made to rise to the upper layer, and the materials in the carbonization box are distributed more evenly through exchange of the materials on the upper layer and the lower layer. According to the device, the materials are prevented from being excessively stacked or sparse in a certain area, the cathode materials are fully mixed and turned over in the carbonization box through rotation of the stirring rod and the mixing blades, and the mixing mode ensures that all parts of the materials can be uniformly heated.

Description

Technical Field

[0001] The utility model relates to the technical field of negative electrode material preparation, in particular to a high-temperature carbonization device for preparing negative electrode materials. Background Technique

[0002] As is well known, with the rapid development of the new energy industry, especially the continuous progress of lithium-ion battery technology, the demand for negative electrode materials is increasing day by day, and the requirements for their performance and quality are becoming more and more stringent. As a key component of lithium-ion batteries, the performance of negative electrode materials directly affects the energy density, cycle life and safety of the batteries.

[0003] In the preparation process of traditional negative electrode material carbonization devices, problems such as uneven mixing and uneven heating often occur, resulting in low carbonization reaction efficiency and large differences in material performance, which in turn affect the quality and consistency of the final product. Specifically, during the carbonization process of traditional equipment, due to the imperfect stirring and mixing mechanism, the negative electrode materials are prone to form local accumulations or sparsities in the carbonization chamber, resulting in uneven heat transfer and local overheating or underheating. This not only reduces the efficiency of the carbonization reaction, but also may lead to unstable material performance, such as differences in conductivity, structural stability and cycle performance, and most of the bottom scrapers in the carbonization chamber are relatively complex to disassemble. Summary of the Utility Model

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides a high-temperature carbonization device for preparing negative electrode materials.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the present utility model provides the following technical solutions: A high-temperature carbonization device for preparing negative electrode materials, comprising a carbonization box, an auxiliary device and a disassembly and assembly device. One end of the top wall of the carbonization box is provided with a feed hopper, the other end of the top wall of the carbonization box is provided with an exhaust pipe, the middle part of the top end of the carbonization box is provided with a driving motor, the output end of the driving motor penetrates through the top wall of the carbonization box and extends into the inner cavity of the carbonization box to be provided with a rotating shaft, stirring rods are installed on the outer walls of the upper and lower ends of the rotating shaft, the auxiliary device is installed in the middle of the rotating shaft, the auxiliary device includes a transmission box, a driving bevel gear, a driven bevel gear, an auxiliary shaft and mixing blades. The outer wall of the middle part of the rotating shaft is installed with the transmission box through a bearing, the driving bevel gear is installed on the outer wall of the rotating shaft in the transmission box, both ends of the driving bevel gear are meshed and connected with the driven bevel gear, two groups of auxiliary shafts are rotatably installed at the left and right ends of the two groups of transmission boxes, one end of the auxiliary shaft far away from the side wall of the carbonization box is connected with the driven bevel gear, and multiple groups of the mixing blades are arranged in a ring on the outer wall of the auxiliary shaft. The bottom wall of the rotating shaft is installed with a bottom scraper through the disassembly and assembly device.

[0008] To facilitate the disassembly and assembly of the bottom scraper, the present utility model is improved in that the disassembly and assembly device includes a positioning block, a positioning groove, a slider, a chute and a spring. An installation seat is installed on the bottom wall of the rotating shaft, an installation block is installed at the top end of the bottom scraper, a cylindrical groove is opened at the bottom end of the installation seat, two groups of square grooves are opened on the left and right side walls of the cylindrical groove, the positioning block is movably installed in the square groove, the positioning groove is opened on the left and right sides of the installation block, the positioning groove is adapted to the positioning block, chutes are opened at the upper and lower ends of the square groove, sliders are fixedly installed at the upper and lower ends of the positioning block, the sliders are slidably connected with the chutes, and the spring for supporting the slider is installed in the chute.

[0009] To facilitate driving the positioning block, the present utility model is improved in that a pull plate is installed at one end of the positioning block far away from the positioning groove.

[0010] To prevent materials from adhering to the side wall of the carbonization box, the present utility model is improved in that side scrapers are installed at the ends of the stirring rods far away from the rotating shaft.

[0011] Preferably, the present utility model is improved in that the mixing blades are designed to be inclined.

[0012] To ensure the stability and accuracy of the operation of the driving motor, the present utility model is improved in that the driving motor is a servo motor.

[0013] To ensure the stable support of the carbonization box, the present utility model is improved in that two groups of fixing rings are installed on the outer wall of the carbonization box, and support legs are installed at the four corners of the fixing rings.

[0014] In order to ensure the stable support of the support legs, the present utility model is improved in that a support foot is installed on the bottom wall of the support legs.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present utility model provides a high-temperature carbonization device for preparing negative electrode materials, having the following beneficial effects:

[0017] 1. In the high-temperature carbonization device for preparing negative electrode materials, through the auxiliary device provided, the driving motor drives the rotating shaft to rotate, and with the synergistic effect of the stirring rod and the mixing blades, the negative electrode materials are fully mixed and turned in the carbonization chamber. This mixing method ensures that all parts of the materials are evenly heated, avoiding local overheating or underheating, thus greatly improving the efficiency of the carbonization reaction. The uniform heating and mixing contribute to the uniform progress of the carbonization reaction, avoiding material property differences caused by local overheating or underheating, which makes the quality of the finally obtained negative electrode materials more stable and the consistency better.

[0018] 2. In the high-temperature carbonization device for preparing negative electrode materials, through the disassembly and assembly device provided, the operator only needs to pull the pull plate to drive the positioning block to leave the positioning groove, and then can easily release the locking of the installation block, thus completing the disassembly of the bottom scraper. Similarly, when installing a new scraper, only need to align the installation block and insert it into the cylindrical groove, and the installation can be completed through the automatic locking function of the positioning block. This convenient disassembly and assembly method greatly shortens the maintenance time and improves the operation efficiency of the equipment. Brief description of the drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 It is a half-sectional three-dimensional structure diagram of the carbonization chamber and the transmission box of the present utility model;

[0021] Figure 3 It is a three-dimensional structure diagram of the rotating shaft and the bottom scraper of the present utility model;

[0022] Figure 4 In the present utility model Figure 3 The enlarged structural diagram of the partial A.

[0023] In the figure: 1, carbonization box; 2, feed hopper; 3, exhaust pipe; 4, drive motor; 5, rotating shaft; 6, stirring rod; 7, transmission box; 8, driving bevel gear; 9, driven bevel gear; 10, auxiliary shaft; 11, mixing blade; 12, bottom scraper; 13, positioning block; 14, positioning groove; 15, slider; 16, chute; 17, spring; 18, mounting seat; 19, mounting block; 20, cylindrical groove; 21, square groove; 22, pulling plate; 23, side scraper; 24, fixing ring; 25, support leg; 26, support foot. Specific implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1-4, a high-temperature carbonization device for preparing a negative electrode material, comprising a carbonization box 1, an auxiliary device and a disassembly and assembly device. One end of the top wall of the carbonization box 1 is provided with a feed hopper 2, and the other end of the top wall of the carbonization box 1 is provided with an exhaust pipe 3. In the middle of the top end of the carbonization box 1, a driving motor 4 is installed. The output end of the driving motor 4 penetrates the top wall of the carbonization box 1 and extends into the inner cavity of the carbonization box 1 to install a rotating shaft 5. Stirring rods 6 are installed on the outer walls of the upper and lower ends of the rotating shaft 5. An auxiliary device is installed in the middle of the rotating shaft 5. The auxiliary device includes a transmission box 7, a driving bevel gear 8, a driven bevel gear 9, an auxiliary shaft 10 and mixing blades 11. The outer wall of the middle part of the rotating shaft 5 is installed with the transmission box 7 through a bearing. The driving bevel gear 8 is installed on the outer wall of the rotating shaft 5 in the transmission box 7. Both ends of the driving bevel gear 8 are meshed and connected with the driven bevel gear 9. Two groups of auxiliary shafts 10 are rotatably installed at the left and right ends of the two groups of transmission boxes 7. One end of the auxiliary shaft 10 far from the side wall of the carbonization box 1 is connected with the driven bevel gear 9. A plurality of groups of mixing blades 11 are arranged in a ring on the outer wall of the auxiliary shaft 10. The bottom wall of the rotating shaft 5 is installed with a bottom scraper 12 through the disassembly and assembly device. In this embodiment, when in use, the negative electrode material and other materials that need to be added for reaction are first fed into the carbonization box 1 through the feed hopper 2 on the top wall of the carbonization box 1. The feed hopper 2 ensures that the materials can smoothly enter the carbonization area, avoiding blockage or accumulation. The temperature in the carbonization box 1 (the temperature control of the carbonization box is a well-known technology and will not be specifically described here) gradually rises to remove some volatile substances and moisture in the negative electrode material. Then, the driving motor 4 starts to work, driving the rotating shaft 5 to rotate. The stirring rods 6 at the upper and lower ends of the rotating shaft 5 initially stir and mix the negative electrode material to promote the uniform heating and reaction of the materials. At the same time, the auxiliary device in the middle of the rotating shaft 5 starts to play a role. During the rotation of the rotating shaft 5, the driving bevel gear 8 in the transmission box 7 is driven. The driving bevel gear 8 drives the two groups of driven bevel gears 9 to rotate, and then drives the auxiliary shafts 10 and the mixing blades 11 to rotate. The annular arrangement and rotational movement of the mixing blades 11 enable the negative electrode material to be more fully mixed and stirred in the carbonization box 1, which helps to improve the uniformity and efficiency of the carbonization reaction. The rotation of the mixing blades 11 can turn the upper-layer materials to the lower layer, and at the same time make the lower-layer materials rise to the upper layer. This exchange of upper and lower layer materials makes the material distribution in the carbonization box 1 more uniform, avoiding excessive accumulation or sparseness of materials in a certain area. Through the rotation of the stirring rods 6 and the mixing blades 11, the negative electrode material is fully mixed and turned in the carbonization box 1. This mixing method ensures that all parts of the material can be evenly heated, avoiding local overheating or underheating, thereby improving the efficiency of the carbonization reaction. This mixing method ensures that all parts of the material can be evenly heated, avoiding local overheating or underheating, thereby improving the efficiency of the carbonization reaction. At the same time, the uniform heating also promotes the uniform progress of the carbonization reaction.Help to obtain a negative electrode material with more stable quality.

[0026] During actual use, it is further convenient to disassemble and assemble the bottom scraper 12. In this embodiment, the disassembly and assembly device includes a positioning block 13, a positioning groove 14, a slider 15, a chute 16 and a spring 17. An installation seat 18 is installed on the bottom wall of the rotating shaft 5, and an installation block 19 is installed at the top end of the bottom scraper 12. A cylindrical groove 20 is opened at the bottom end of the installation seat 18, and two groups of square grooves 21 are opened on the left and right side walls of the cylindrical groove 20. The positioning block 13 is movably installed in the square groove 21. The positioning grooves 14 are opened on the left and right sides of the installation block 19, and the positioning grooves 14 are adapted to the positioning block 13. Chutes 16 are opened at the upper and lower ends of the square groove 21. Sliders 15 are fixedly installed at the upper and lower ends of the positioning block 13, and the sliders 15 are slidably connected to the chutes 16. Springs 17 for supporting the sliders 15 are installed in the chutes 16. When it is necessary to install the bottom scraper 12, only need to align the installation block 19 with the cylindrical groove 20 at the bottom of the installation seat 18, and then insert the installation block 19 into the cylindrical groove 20. When the installation block 19 enters the cylindrical groove 20, it contacts the positioning block 13 and applies a force to the positioning block 13. The slider 15 is affected by the force of the positioning block 13 and drives the spring 17 to be compressed. The positioning block 13 is received into the square groove 21. When the positioning block 13 is aligned with the positioning groove 14, the spring 17 loses support and drives the slider 15 to move in the chute 16. The slider 15 drives the positioning block 13 to move towards the installation block 19 until the positioning block 13 enters the positioning groove 14, realizing the locking of the installation block 19, that is, completing the installation of the bottom scraper 12. When it is necessary to disassemble and replace, only need to drive the two positioning blocks 13 to leave the positioning groove 14 at the same time, then the locking of the installation block 19 can be released, that is, the disassembly of the bottom of the rotating shaft 5 and the bottom scraper 12 is completed.

[0027] During actual use, it is further convenient to drive the positioning block 13. In this embodiment, a pull plate 22 is installed at one end of the positioning block 13 away from the positioning groove 14. The pull plate 22 serves as a driving point, enabling the operator to more conveniently drive the movement of the positioning block 13 by pulling or pushing the pull plate 22. This direct and simple operation method reduces complex mechanical operations or adjustment steps and improves work efficiency.

[0028] During actual use, it is further possible to prevent materials from adhering to the side wall of the carbonization box 1. In this embodiment, a side scraper 23 is installed at one end of the stirring rod 6 away from the rotating shaft 5. The side scraper 23 moves as the stirring rod 6 rotates, can directly contact the side wall of the carbonization box 1, scrape off the materials adhering to the side wall and remix them into the main material, ensuring that the materials on the side wall are not left out or accumulated, thereby avoiding waste of resources and possible cleaning problems.

[0029] Preferably, in this embodiment, the mixing blades 11 are inclined. The inclined mixing blades 11 can generate stronger turning and stirring forces when rotating, enabling the materials to be more fully turned and stirred in the carbonization tank 1. This design helps to accelerate the mixing speed of the materials, improve the mixing uniformity, and thus enhance the efficiency of the carbonization process.

[0030] During the actual use process, to further ensure the stability and accuracy of the operation of the driving motor 4, in this embodiment, the driving motor 4 is a servo motor. The servo motor can perform position, speed, and torque control with high precision. The servo motor adopts closed-loop control and has good stability, which can avoid problems such as stalling and vibration, and ensure the stability and accuracy of the operation of the driving motor 4.

[0031] During the actual use process, to further ensure the stable support of the carbonization tank 1, in this embodiment, two groups of fixing rings 24 are installed on the outer wall of the carbonization tank 1, and support legs 25 are installed at the four corners of the fixing rings 24. The combination of the fixing rings 24 and the support legs 25 provides a strong support framework for the carbonization tank 1. This design increases the overall structural strength of the carbonization tank 1, enabling it to withstand greater external pressures and loads, and reducing deformation or damage caused by uneven stress or overload.

[0032] During the actual use process, to further ensure the stable support of the support legs 25, in this embodiment, support feet 26 are installed on the bottom wall of the support legs 25. The design of the support feet 26 can usually increase the contact area with the ground, thereby dispersing the pressure of the equipment on the ground, reducing the stress on a single area, and improving the overall support stability.

[0033] To illustrate in detail the possible application scenarios, technical principles, feasible specific solutions, achievable purposes and effects of this application, etc., the following will be described in detail with reference to the specific embodiments listed and in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application, so they are only examples and cannot be used to limit the protection scope of this application.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-temperature carbonization device for preparing negative electrode materials, comprising a carbonization box (1), an auxiliary device and a disassembly device, characterized in that: A feed hopper (2) is installed at one end of the top wall of the carbonization box (1), an exhaust pipe (3) is installed at the other end of the top wall of the carbonization box (1), a drive motor (4) is installed in the middle of the top of the carbonization box (1), the output end of the drive motor (4) passes through the top wall of the carbonization box (1) and extends to the inner cavity of the carbonization box (1) to install a rotating shaft (5), the upper and lower outer walls of the rotating shaft (5) are both installed with stirring rods (6), the middle of the rotating shaft (5) is installed with the auxiliary device, the auxiliary device comprises a transmission box (7), a driving bevel gear (8), a driven bevel gear (9), an auxiliary shaft (10) and a mixing blade (11), the rotating shaft (5 ) is mounted on the outer wall of the middle part of the carbonization box (1) via a bearing, the driving bevel gear (8) is mounted on the outer wall of the rotating shaft (5) in the driving bevel gear (7), both ends of the driving bevel gear (8) are meshingly connected with the driven bevel gear (9), two groups of auxiliary shafts (10) are rotatably mounted on the left and right ends of the two groups of the driving boxes (7), one end of the auxiliary shaft (10) away from the side wall of the carbonization box (1) is connected to the driven bevel gear (9), the outer wall of the auxiliary shaft (10) is arranged in an annular shape with multiple groups of mixing blades (11), and the bottom wall of the rotating shaft (5) is mounted with a bottom scraper (12) via the disassembly and assembly device.

2. A high temperature carbonization device for preparing negative electrode materials according to claim 1, characterized in that: The disassembly and assembly device comprises a positioning block (13), a positioning groove (14), a sliding block (15), a sliding groove (16) and a spring (17); a mounting seat (18) is installed on the bottom wall of the rotating shaft (5); a mounting block (19) is installed on the top of the bottom scraper (12); a cylindrical groove (20) is provided at the bottom end of the mounting seat (18); two groups of square grooves (21) are provided on the left and right side walls of the cylindrical groove (20); the positioning block (13) is movably installed in the square groove (21); the positioning groove (14) is provided on the left and right sides of the mounting block (19); the positioning groove (14) is adapted to the positioning block (13); sliding grooves (16) are provided at the upper and lower ends of the square groove (21); sliding blocks (15) are fixedly installed at the upper and lower ends of the positioning block (13); the sliding block (15) is slidably connected to the sliding groove (16); and the spring (17) for supporting the sliding block (15) is installed in the sliding groove (16).

3. A high temperature carbonization device for preparing negative electrode materials according to claim 2, characterized in that: A pull plate (22) is installed at one end of the positioning block (13) away from the positioning groove (14).

4. A high temperature carbonization device for preparing negative electrode materials according to claim 3, characterized in that: A side scraper (23) is mounted on one end of the stirring rod (6) away from the rotating shaft (5).

5. A high temperature carbonization device for preparing negative electrode materials according to claim 4, characterized in that: The mixing blade (11) is of inclined design.

6. A high temperature carbonization device for preparing negative electrode materials according to claim 5, characterized in that: The driving motor (4) is a servo motor.

7. A high temperature carbonization device for preparing negative electrode materials according to claim 6, characterized in that: Two groups of fixing rings (24) are installed on the outer wall of the carbonization box (1), and supporting legs (25) are installed at the four corners of the fixing rings (24).

8. A high temperature carbonization device for preparing negative electrode materials according to claim 7, characterized in that: A supporting foot (26) is mounted on the bottom wall of the supporting leg (25).

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