A positive electrode material slurry magnetic removal device

Abstract

The utility model discloses a positive electrode material slurry magnetic removal device relates to lithium battery positive electrode material field, including slurry storage jar, the slurry storage jar top one side outer surface fixed mounting has the water inlet, the water inlet fixedly connected with second water pipe and extends to the slurry storage jar inside with first water pipe connection, first water pipe bottom outer surface fixed mounting has the shower head, the slurry storage jar top rotation has the stirring motor, the stirring motor bottom rotation has the stirring shaft, the stirring shaft extends to the slurry storage jar inside and fixedly installs stirring oar, the slurry storage jar top other side fixed mounting has first material pipe, be connected with second material pipe and third material pipe on first material pipe with first magnetic removal small jar, second magnetic removal small jar's one side outer surface fixed connection respectively. In the utility model, through the cooperation of first magnetic removal small jar and second small jar, the time of dismounting and cleaning is greatly saved, and the influence of production capacity is saved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery cathode materials, specifically a cathode material slurry demagnetization device. Background Technology

[0002] During the production of lithium manganese iron phosphate cathode materials, due to various reasons such as equipment and pipeline wear, trace amounts of highly magnetic materials and impurities may be mixed in the materials. These trace amounts of highly magnetic materials and impurities can form micro-batteries in lithium-ion batteries, reducing the specific capacity of lithium-ion batteries. In severe cases, they may puncture the lithium-ion battery separator or even cause the lithium-ion battery to explode. Therefore, it is necessary to remove the highly magnetic materials and impurities present in the raw materials. Thus, demagnetization treatment is required before battery production. With the widespread adoption and development of lithium manganese iron phosphate batteries, their safety and cycle performance have attracted much attention. Magnetic foreign matter in the battery has a significant impact on its safety and cycle performance, so the lower the level of magnetic foreign matter in lithium manganese iron phosphate batteries, the better. Currently, the requirement is generally that the content of magnetic foreign matter in lithium manganese iron phosphate batteries be less than 1 ppm. The demagnetization process in the production of lithium manganese iron phosphate is relatively limited. The existing demagnetization equipment for lithium manganese iron phosphate is relatively simple. Most of the preparation tanks do not have a stirring mechanism, which makes it difficult to thoroughly adsorb magnetic substances in the lithium manganese iron phosphate slurry and to clean the material adhering to the inside of the tank. In addition, the efficiency of the existing demagnetization devices cannot be improved, thus affecting the production capacity. Utility Model Content

[0003] The purpose of this invention is to provide a demagnetizing device for positive electrode material slurry to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a positive electrode material slurry demagnetization device, comprising a slurry storage tank, an inlet fixedly installed on the outer surface of one side of the top of the slurry storage tank, a second water pipe fixedly connected to the inlet and extending into the slurry storage tank and connected to a first water pipe, a spray head fixedly installed on the outer surface of the bottom of the first water pipe, a stirring motor rotatably installed on the top of the slurry storage tank, a stirring shaft rotatably installed on the bottom of the stirring motor, the stirring shaft extending into the slurry storage tank and fixedly installed with a stirring paddle, a first material pipe fixedly installed on the other side of the top of the slurry storage tank, a second material pipe and a third material pipe connected to the first material pipe and fixedly connected to one side of the outer surface of the first demagnetizing tank and the second demagnetizing tank respectively, and a fourth material pipe fixedly connected to the other side of the outer surface of the first demagnetizing tank and the second demagnetizing tank.

[0005] Preferably, an electromagnetizing assembly is fixedly installed inside the slurry storage tank, a slurry outlet is fixedly installed on one outer surface of the slurry storage tank, a drain outlet is fixedly installed on the outer surface of the bottom of the slurry storage tank, and the electromagnetizing assembly is provided with a current range.

[0006] Preferably, there are a total of 3 sets of spray heads, with 2 heads in each set.

[0007] Preferably, a first shut-off valve and a fourth shut-off valve are fixedly installed on the second material pipe and the third material pipe, and a second shut-off valve and a third shut-off valve are fixedly installed on the fourth material pipe. The other end of the fourth material pipe is connected to the feed inlet. A cover plate is movably installed on the top of the first demagnetizing tank. A fixing screw is fixedly installed inside the cover plate, and a demagnetizing rod is rotatably installed on the fixing screw.

[0008] Preferably, the demagnetizing rod is a permanent magnet rod and there are 4 groups of 2 rods in each group.

[0009] Preferably, the stirring paddles are in three sets of two, and a handle is fixedly installed on the top outer surface of the cover plate.

[0010] Preferably, a support frame is installed at the bottom of the slurry storage tank, a pneumatic cylinder is installed at the top center of the support frame, a sealing plug is installed at the output end of the pneumatic cylinder, a sealing sleeve is installed on the outside of the sealing plug, and a sealing gasket is installed on the top outside of the sealing plug.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This positive electrode material slurry demagnetization device effectively reduces the magnetic materials in the slurry through a first demagnetization process in a first demagnetization tank and a second demagnetization process using an electromagnetization component. The combined use of the stirring paddle and stirring shaft effectively adsorbs the magnetic materials in the slurry onto the storage tank wall, and then discharges them through the drain port, thus achieving a reasonable separation of the slurry and highly magnetic substances. The spray head can not only clean the magnetic substances in the storage tank, but also further clean the material adhering to the tank. Furthermore, the combined use of the first and second demagnetization tanks, with one tank in standby and the other in use, greatly saves disassembly and cleaning time and reduces the impact on production capacity. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an enlarged view of the first demagnetizing container of this utility model; Figure 3 This is a perspective view of the slurry storage tank of this utility model; Figure 4 This utility model Figure 1 Schematic diagram of the structure at point A in the middle; Figure 5 This is a schematic diagram of the sealing plug structure of this utility model.

[0013] In the diagram: 1. Slurry storage tank; 2. Drain outlet; 3. Slurry outlet; 4. Electromagnetic demagnetizing assembly; 5. Agitator; 6. Agitator shaft; 7. Spray head; 8. First water pipe; 9. Second water pipe; 10. Water inlet; 11. Agitator motor; 12. First material pipe; 13. Second material pipe; 14. First shut-off valve; 15. First demagnetizing tank; 16. Second shut-off valve; 17. Feed inlet; 18. Third shut-off valve; 19. Second demagnetizing tank; 20. Fourth shut-off valve; 21. Third material pipe; 22. Fourth material pipe; 23. Fixing screw; 24. Cover plate; 25. Handle; 26. Demagnetizing rod; 27. Support frame; 28. Pneumatic cylinder; 29. ​​Sealing plug; 30. Sealing sleeve; 31. Sealing gasket. 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 1-5This utility model provides a technical solution: a demagnetizing device for positive electrode material slurry, including a slurry storage tank 1. An electromagnetizing component 4 is fixedly installed inside the slurry storage tank 1. When energized, the electromagnetizing component 4 generates a magnetic field that attracts magnetic materials in the slurry to the inner wall of the slurry storage tank 1. A slurry outlet 3 is fixedly installed on one outer surface of the slurry storage tank 1, through which the demagnetized slurry is discharged. A drain outlet 2 is fixedly installed on the bottom outer surface of the slurry storage tank 1, through which highly magnetic materials and impurities are discharged. A water inlet 10 is fixedly installed on one outer surface of the top of the slurry storage tank 1. The water inlet 10 is fixedly connected to a second water pipe 9 and extends into the slurry storage tank 1, connecting to a first water pipe 8. A spray head 7 is fixedly installed on the bottom outer surface of the first water pipe 8. When the electromagnetizing component 4 is de-energized, the highly magnetic materials begin to fall due to their weight, and the spray head 7 cleans these materials. A stirring motor 11 is rotatably installed on the top of the slurry storage tank 1, and a stirring shaft is rotatably installed on the bottom of the stirring motor 11. 6. The stirring shaft 6 extends into the slurry storage tank 1 and is fixedly installed with a stirring paddle 5. The stirring paddle 5 can fully mix the slurry and make full contact between the slurry and the wall of the slurry storage tank 1, thereby enhancing the demagnetization effect. A first material pipe 12 is fixedly installed on the other side of the top of the slurry storage tank 1. A second material pipe 13 and a third material pipe 21 are connected to the first material pipe 12 and are fixedly connected to one side of the outer surface of the first demagnetizing tank 15 and the second demagnetizing tank 19, respectively. A fourth material pipe 22 is fixedly connected to the other side of the outer surface of the first demagnetizing tank 15 and the second demagnetizing tank 19. The other end of the fourth material pipe 22 is connected to the inlet 17. The slurry passes through the pipes and undergoes the first demagnetization process, namely the first demagnetizing tank 15, for preliminary demagnetization. A cover plate 24 is movably installed on the top of the first demagnetizing tank 15 for easy disassembly and cleaning. A fixing screw 23 is fixedly installed inside the cover plate 24 to facilitate the disassembly, cleaning, and replacement of the demagnetizing rod 26. The demagnetizing rod 26 is rotatably installed on the fixing screw 23.

[0016] The electromagnetizing assembly 4 has a current range, and the magnitude of the magnetic field strength is controlled by the magnitude of the current to adjust the demagnetizing effect. There are a total of 3 sets of spray heads 7, with 2 in each set. The cooperation of multiple spray heads 7 enhances the cleaning effect. The first stop valve 14 and the fourth stop valve 20 are fixedly installed on the second material pipe 13 and the third material pipe 21, and the second stop valve 16 and the third stop valve 18 are fixedly installed on the fourth material pipe 22. The alternating use of the first demagnetizing tank 15 and the second demagnetizing tank 19 is achieved by switching different stop valves, so as to realize one standby and one use, and avoid production capacity loss caused by cleaning. The demagnetizing rod 26 is a permanent magnet rod and there are 4 sets of 2 in each set to enhance the demagnetizing effect of the first process. There are 3 sets of stirring paddles 5, with 2 in each set, to enhance the mixing effect. The top outer surface of the cover plate 24 is fixedly installed with a handle 25 to facilitate the disassembly of the demagnetizing rod 26 and the first demagnetizing tank 15.

[0017] A support frame 27 is installed at the bottom of the slurry storage tank 1. A pneumatic cylinder 28 is installed at the center of the top of the support frame 27. A sealing plug 29 is installed at the output end of the pneumatic cylinder 28. A sealing sleeve 30 is installed on the outside of the sealing plug 29. A sealing gasket 31 is installed on the outside of the top of the sealing plug 29. The support frame 27 is used to support the slurry storage tank 1 from the bottom. In order to facilitate the discharge of high magnetic materials and impurities through the drain port 2, the drain port 2 is moved upward by the output end sealing plug 29 driven by the pneumatic cylinder 28. The sealing plug 29 corresponds to the drain port 2. The outer side of the sealing plug 29 is sealed with the drain port 2 through the sealing sleeve 30. The bottom of the drain port 2 is sealed by the sealing gasket 31, so that the sealing plug 29 seals the drain port 2. When it is necessary to open the drain port 2 to discharge the high magnetic materials and impurities inside, the pneumatic cylinder 28 drives the sealing plug 29 to move downward, so that the drain port 2 can be opened. The staff can discharge the high magnetic materials and impurities through the drain port 2, making the discharge of high magnetic materials and impurities more convenient and more complete.

[0018] 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 demagnetizing device for positive electrode material slurry, comprising a slurry storage tank (1), characterized in that: A water inlet (10) is fixedly installed on the outer surface of one side of the top of the slurry storage tank (1). The water inlet (10) is fixedly connected to a second water pipe (9) and extends into the slurry storage tank (1) to connect with a first water pipe (8). A spray head (7) is fixedly installed on the outer surface of the bottom of the first water pipe (8). A stirring motor (11) is rotatably installed on the top of the slurry storage tank (1). A stirring shaft (6) is rotatably installed on the bottom of the stirring motor (11). The stirring shaft (6) extends into the slurry storage tank (1) and is fixedly installed with a stirring paddle (5). A first material pipe (12) is fixedly installed on the other side of the top of the slurry storage tank (1). A second material pipe (13) and a third material pipe (21) are connected to the first material pipe (12) and are fixedly connected to one side of the outer surface of the first demagnetizing tank (15) and the second demagnetizing tank (19), respectively. A fourth material pipe (22) is fixedly connected to the other side of the outer surface of the first demagnetizing tank (15) and the second demagnetizing tank (19).

2. The positive electrode material slurry demagnetizing device according to claim 1, characterized in that: An electromagnetizing assembly (4) is fixedly installed inside the slurry storage tank (1). A slurry outlet (3) is fixedly installed on one side of the outer surface of the slurry storage tank (1). A drain outlet (2) is fixedly installed on the bottom outer surface of the slurry storage tank (1). The electromagnetizing assembly (4) is provided with a current range.

3. The positive electrode material slurry demagnetizing device according to claim 1, characterized in that: The spray heads (7) consist of 3 groups, with 2 heads in each group.

4. The positive electrode material slurry demagnetizing device according to claim 1, characterized in that: The second material pipe (13) and the third material pipe (21) are fixedly installed with a first shut-off valve (14) and a fourth shut-off valve (20). The fourth material pipe (22) is fixedly installed with a second shut-off valve (16) and a third shut-off valve (18). The other end of the fourth material pipe (22) is connected to the feed inlet (17). The top of the first demagnetizing tank (15) is movably installed with a cover plate (24). The inside of the cover plate (24) is fixedly installed with a fixing screw (23). The fixing screw (23) is rotatably installed with a demagnetizing rod (26).

5. The positive electrode material slurry demagnetizing device according to claim 4, characterized in that: The demagnetizing rod (26) is a permanent magnet rod and there are 4 groups of 2 rods in each group.

6. The positive electrode material slurry demagnetizing device according to claim 4, characterized in that: The stirring paddle (5) has three sets of two paddles in each set, and a handle (25) is fixedly installed on the top outer surface of the cover plate (24).

7. The positive electrode material slurry demagnetizing device according to claim 1, characterized in that: The bottom of the slurry storage tank (1) is equipped with a support frame (27), and a pneumatic cylinder (28) is installed at the center of the top of the support frame (27). A sealing plug (29) is installed at the output end of the pneumatic cylinder (28), a sealing sleeve (30) is installed on the outside of the sealing plug (29), and a sealing gasket (31) is installed on the top outside of the sealing plug (29).

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