Device for solving difficult dispersion of lithium battery superconducting carbon black

Abstract

The utility model relates to the technical field of lithium batteries, in particular to a device for solving the problem that superconductive carbon black of a lithium battery is difficult to disperse, which comprises a sanding box, a feeding pipe is mounted at the top of the efficient pulping machine, and a discharging pipe is mounted at the lower end of the efficient pulping machine; the preparation method has the beneficial effects that in the preparation process, the sand milling box with very strong dispersing capacity is used for pre-dispersing the superconducting carbon black powder and the CNT conductive slurry, and then the traditional positive electrode slurry mixing process in the industry is used for proportioning, so that the superconducting carbon black is well dispersed and the slurry is extremely good in flowability and stability; therefore, the superconductive carbon black can give full play to excellent conductivity, and the problem that performance of the superconductive carbon black is affected due to the fact that the superconductive carbon black cannot be well dispersed is solved.

Description

Technical Field

[0001] This utility model relates to the field of lithium batteries, specifically to a device for solving the problem of difficult dispersion of superconducting carbon black in lithium batteries. Background Technology

[0002] Lithium-ion batteries are rechargeable, high-performance batteries widely used in mobile devices, electric vehicles, and energy storage systems. Their working principle involves the reciprocating insertion and extraction of lithium ions between the positive and negative electrodes to achieve the charging and discharging process. Lithium-ion batteries have advantages such as high energy density, low self-discharge rate, and long cycle life, providing high energy output in a small volume and weight. Furthermore, they have no memory effect, support fast charging, and are suitable for various applications requiring long-term stable power supply. These characteristics make lithium-ion batteries an important component of modern electronic devices and the clean energy field. The uniform dispersion of superconducting carbon black in lithium-ion battery electrodes can significantly improve battery performance. Good dispersion helps form a stable conductive network, increasing the electronic conductivity and ion diffusion rate of the electrode material, thereby improving the battery's charging and discharging efficiency and cycle stability. Conversely, poor dispersion leads to increased internal electrode resistance, affecting the overall battery performance.

[0003] In the existing technology, the dispersion of conductive carbon black is mainly carried out by a dual planetary mixer. This equipment can provide strong shear force and mixing effect, ensuring that the carbon black is evenly distributed in the slurry.

[0004] However, while traditional conductive carbon black dispersion methods can effectively disperse conventional conductive carbon black, they fail to achieve good dispersion results for superconducting carbon black, which is more difficult to disperse, thus affecting the performance of superconducting carbon black. Therefore, this invention proposes a device to solve the problem of difficult dispersion of superconducting carbon black in lithium batteries and address the aforementioned technical issues. Utility Model Content

[0005] The purpose of this invention is to provide a device for solving the problem of difficult dispersion of superconducting carbon black in lithium batteries, thereby addressing the issues raised in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for solving the problem of difficult dispersion of superconducting carbon black in lithium batteries, the device comprising: a sand mill box, one end of which is connected to a transfer tank via a connecting pipe;

[0007] The high-efficiency pulping machine has a feeding pipe installed at the top and a discharge pipe installed at the bottom.

[0008] Preferably, the grinding box is cylindrical in shape, with a hole at one end of the grinding box and a feed pipe fixedly installed in the hole, and a hole at the other end of the grinding box and a feeding pipe installed in the hole. The grinding box is fixedly installed on the main machine platform.

[0009] Preferably, a control device is fixedly installed on one end of the main unit surface, a solid pump is fixedly installed on the other end of the main unit surface, a discharge pipe is fixedly installed on one side of the solid pump, a conveying pipe is fixedly installed on one end of the solid pump, and one end of the conveying pipe is fixedly installed inside the inlet pipe.

[0010] Preferably, the transfer tank has an overall inverted conical structure. A hole is opened on the upper surface of the transfer tank, and a fixing pipe is fixedly installed in the hole. A cover is fixedly installed on the top of the fixing pipe. A connection hole is opened on the upper surface of the transfer tank. Several support feet are fixedly installed on the bottom of the transfer tank. A hole is opened on the bottom of the transfer tank, and a transfer pipe is fixedly installed in the hole. A viewing frame is fixedly installed on the outer wall surface of the transfer tank. A support platform is fixedly installed on the side of the transfer tank near the sanding box.

[0011] Preferably, a first extraction pump is fixedly installed on the surface of the support platform, a connecting pipe is fixedly installed on the upper surface of the first extraction pump, one end of the connecting pipe is fixedly installed inside the feeding pipe, and a connecting pipe is fixedly installed on the end of the first extraction pump away from the grinding box, with one end of the connecting pipe fixedly installed in a hole opened on the upper surface of the transfer tank.

[0012] Preferably, the high-efficiency pulper has a cylindrical structure. A pulping device is fixedly installed on the upper surface of the high-efficiency pulper, a support platform is fixedly installed on the side of the high-efficiency pulper, a second extraction pump is fixedly installed on the surface of the support platform, a transfer pipe is fixedly installed above the second extraction pump, one end of the transfer pipe is fixedly installed inside the transfer pipe, and the end of the second extraction pump away from the transfer tank is connected to the upper end of the high-efficiency pulper through a pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The device proposed in this invention solves the problem of difficult dispersion of superconducting carbon black in lithium batteries. In use, superconducting carbon black powder and CNT conductive slurry are pre-dispersed sequentially in a sand mill. Then, the dispersed superconducting carbon black and CNT mixed conductive slurry is transferred to a transfer tank via a connecting pipe. Simultaneously, lithium iron phosphate and PVDF binder powder are added to a high-efficiency pulping machine through a feeding pipe. The slurry in the transfer tank is then transported to the high-efficiency pulping machine. Next, NMP solvent is added to the high-efficiency pulping machine through a feeding pipe for pulping. The preparation process uses a sand mill with strong dispersing capabilities to pre-disperse the superconducting carbon black powder and CNT conductive slurry. Then, the traditional positive electrode slurry mixing process is used for batching. This feeding method ensures good dispersion of the superconducting carbon black and excellent slurry flowability and stability, allowing the superconducting carbon black to fully exert its excellent conductivity and avoiding the problem of poor dispersion that affects the performance of the superconducting carbon black. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the rear structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the transfer tank structure in this utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the sand grinding device of this utility model.

[0019] In the diagram: 1. Grinding box; 2. Connecting pipe; 3. Transfer tank; 4. High-efficiency pulping machine; 5. Feeding pipe;

[0020] 6. Discharge pipe; 7. Main unit; 8. Feed pipe; 9. Feeding pipe; 10. Control device; 11. Solid pump; 12. Discharge pipe; 13. Conveying pipe; 14. Cover; 15. Support leg; 16. Transfer pipe; 17. Viewing frame; 18. Support platform; 19. First extraction pump; 20. Transfer pipe; 21. Second extraction pump; 22. Pulping device. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Example 1: Please refer to Figures 1-4 This utility model provides a technical solution: a device for solving the problem of difficult dispersion of superconducting carbon black in lithium batteries. The device for solving the problem of difficult dispersion of superconducting carbon black in lithium batteries includes: a sand mill box 1, one end of which is connected to a transfer tank 3 through a connecting pipe 2.

[0023] High-efficiency pulping machine 4, with a feeding pipe 5 installed at the top and a discharge pipe 6 installed at the bottom;

[0024] In use, superconducting carbon black powder and CNT conductive slurry are pre-dispersed in a sand mill 1. Then, the dispersed superconducting carbon black and CNT mixed conductive slurry is transferred to a transfer tank 3 through a connecting pipe 2. At the same time, lithium iron phosphate and PVDF binder powder are added to a high-efficiency pulping machine 4 through a feeding pipe 5. The slurry in the transfer tank 3 is then transported to the high-efficiency pulping machine 4. Next, the solvent NMP is added to the high-efficiency pulping machine 4 through a feeding pipe 5 for pulping. During the preparation process, a sand mill 1 with strong dispersing ability is used to pre-disperse the superconducting carbon black powder and CNT conductive slurry. Then, the traditional positive electrode slurry mixing process in the industry is used for batching. This feeding method can make the superconducting carbon black well dispersed and the slurry has excellent fluidity and stability, so that the superconducting carbon black can give full play to its excellent conductivity and avoid the problem of superconducting carbon black not being well dispersed, which affects the performance of superconducting carbon black.

[0025] Example 2: Based on Example 1, a sand mill box 1 is provided to ensure good dispersion of superconducting carbon black. The sand mill box 1 is cylindrical in shape. A hole is opened at the top of one end of the sand mill box 1, and a feed pipe 8 is fixedly installed in the hole. A hole is opened at the other end of the sand mill box 1, and a feed pipe 9 is installed in the hole. The sand mill box 1 is fixedly installed on the main unit 7.

[0026] A control device 10 is fixedly installed on one end of the main unit 7, and a solid pump 11 is fixedly installed on the other end of the main unit 7. A discharge pipe 12 is fixedly installed on one side of the solid pump 11, and a conveying pipe 13 is fixedly installed on one end of the solid pump 11. One end of the conveying pipe 13 is fixedly installed inside the feed pipe 8.

[0027] During the pulping process, superconducting carbon black powder and CNT conductive slurry are sequentially added to the sand mill 1 through the solid pump 11 and the conveying pipe 13 for pre-dispersion. The grinding media is zirconia beads. In this process, the sand mill 1, which has a strong dispersing ability, pre-disperses the superconducting carbon black and CNT conductive slurry to prepare a mixed slurry of CNT and superconducting carbon black. Then, it is pulped through the transfer tank 3 and the high-efficiency pulping machine 3 to make the superconducting carbon black well dispersed.

[0028] Example 3: Based on Example 2, a high-efficiency pulper 4 is provided to ensure the quality of the pulp. The high-efficiency pulper 4 has a cylindrical structure. A pulping device 22 is fixedly installed on the upper surface of the high-efficiency pulper 4. A support platform 18 is fixedly installed on the side of the high-efficiency pulper 4. A second extraction pump 21 is fixedly installed on the surface of the support platform 18. A transfer pipe 20 is fixedly installed above the second extraction pump 21. One end of the transfer pipe 20 is fixedly installed in the transfer pipe 16. The end of the second extraction pump 21 away from the transfer tank 3 is connected to the upper end of the high-efficiency pulper 4 through a pipe.

[0029] The transfer tank 3 has an overall inverted cone shape. A hole is opened on the upper surface of the transfer tank 3, and a fixing pipe is fixedly installed in the hole. A cover 14 is fixedly installed on the top of the fixing pipe. A connection hole is opened on the upper surface of the transfer tank 3. Several support feet 15 are fixedly installed on the bottom of the transfer tank 3. A transfer pipe 16 is fixedly installed in the hole at the bottom of the transfer tank 3. A viewing frame 17 is fixedly installed on the outer wall surface of the transfer tank 3. A support platform 18 is fixedly installed on the side of the transfer tank 3 near the sanding box 1.

[0030] A first extraction pump 19 is fixedly installed on the surface of the support platform 18. A connecting pipe 2 is fixedly installed on the upper surface of the first extraction pump 19. One end of the connecting pipe 2 is fixedly installed inside the feeding pipe 9. A connecting pipe is fixedly installed on the end of the first extraction pump 19 away from the sand mill box 1. One end of the connecting pipe is fixedly installed in a hole opened on the upper surface of the transfer tank 3.

[0031] During the pulping process, lithium iron phosphate and PVDF binder powder are added to the high-efficiency pulper 4 through the feeding pipe 5. Then, the superconducting carbon black and CNT mixed conductive slurry dispersed in the transfer tank 3 is transported to the high-efficiency pulper 4 through the second extraction pump 21 and the transfer pipe 20. Next, the solvent NMP is added to the high-efficiency pulper 4 through the feeding pipe 5 for pulping. This results in a high solid content, very small viscosity change, excellent slurry fluidity and stability, and excellent slurry dispersion performance, thus improving the overall slurry quality.

[0032] In practical use, superconducting carbon black powder and CNT conductive slurry can be pre-dispersed in a sand mill 1. Then, the dispersed superconducting carbon black and CNT mixed conductive slurry is transferred to a transfer tank 3 through a connecting pipe 2. At the same time, lithium iron phosphate and PVDF binder powder are added to a high-efficiency pulping machine 4 through a feeding pipe 5. The slurry in the transfer tank 3 is then transported to the high-efficiency pulping machine 4. Next, the solvent NMP is added to the high-efficiency pulping machine 4 through a feeding pipe 5 for pulping. During the preparation process, a sand mill 1 with strong dispersing ability is used to pre-disperse the superconducting carbon black powder and CNT conductive slurry. Then, the traditional positive electrode slurry mixing process in the industry is used for batching. This feeding method can make the superconducting carbon black well dispersed and the slurry has excellent fluidity and stability, so that the superconducting carbon black can give full play to its excellent conductivity and avoid the problem of superconducting carbon black not being well dispersed, which affects the performance of superconducting carbon black.

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

Claims

1. A device for solving the problem of difficult dispersion of superconducting carbon black in lithium batteries, characterized in that: The device for solving the problem of difficult dispersion of superconducting carbon black in lithium batteries includes: a sand mill (1), one end of which is connected to a transfer tank (3) via a connecting pipe (2); A high-efficiency pulper (4) is provided with a feeding pipe (5) installed on the top and a discharge pipe (6) installed at the bottom.

2. The device for solving the problem of difficult dispersion of superconducting carbon black in lithium batteries according to claim 1, characterized in that: The grinding box (1) is cylindrical in shape. A hole is opened at the top of one end of the grinding box (1), and a feed pipe (8) is fixedly installed in the hole. A hole is opened at the other end of the grinding box (1), and a feed pipe (9) is installed in the hole. The grinding box (1) is fixedly installed on the main machine platform (7).

3. The apparatus for solving the problem of difficult dispersion of superconducting carbon black in lithium batteries according to claim 2, characterized in that: A control device (10) is fixedly installed on one end of the main unit (7), and a solid pump (11) is fixedly installed on the other end of the main unit (7). A discharge pipe (12) is fixedly installed on one side of the solid pump (11), and a conveying pipe (13) is fixedly installed on one end of the solid pump (11). One end of the conveying pipe (13) is fixedly installed inside the feed pipe (8).

4. The device for solving the problem of difficult dispersion of superconducting carbon black in lithium batteries according to claim 1, characterized in that: The transfer tank (3) has an inverted cone shape. A hole is opened on the upper surface of the transfer tank (3), and a fixing pipe is fixedly installed in the hole. A cover (14) is fixedly installed on the top of the fixing pipe. A connection hole is opened on the upper surface of the transfer tank (3). Several support feet (15) are fixedly installed on the bottom of the transfer tank (3). A hole is opened on the bottom of the transfer tank (3), and a transfer pipe (16) is fixedly installed in the hole. A viewing frame (17) is fixedly installed on the outer wall surface of the transfer tank (3). A support platform (18) is fixedly installed on the side of the transfer tank (3) near the sanding box (1).

5. The apparatus for solving the problem of difficult dispersion of superconducting carbon black in lithium batteries according to claim 4, characterized in that: The support platform (18) is fixedly installed with a first extraction pump (19). A connecting pipe (2) is fixedly installed on the upper surface of the first extraction pump (19). One end of the connecting pipe (2) is fixedly installed in the feeding pipe (9). A connecting pipe is fixedly installed on the end of the first extraction pump (19) away from the grinding box (1). One end of the connecting pipe is fixedly installed in a hole opened on the upper surface of the transfer tank (3).

6. The apparatus for solving the problem of difficult dispersion of superconducting carbon black in lithium batteries according to claim 1, characterized in that: The high-efficiency pulper (4) has a cylindrical structure. A pulping device (22) is fixedly installed on the upper surface of the high-efficiency pulper (4). A support platform (18) is fixedly installed on the side of the high-efficiency pulper (4). A second extraction pump (21) is fixedly installed on the surface of the support platform (18). A transfer pipe (20) is fixedly installed above the second extraction pump (21). One end of the transfer pipe (20) is fixedly installed in the transfer pipe (16). The end of the second extraction pump (21) away from the transfer tank (3) is connected to the upper end of the high-efficiency pulper (4) through a pipe.

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