Lithium battery slurry demagnetization mechanism

Abstract

This utility model discloses a demagnetizing mechanism for lithium battery slurry, comprising a barrel having an inner cavity and an opening for containing the slurry, and an inlet, an outlet, and a drain outlet communicating with the inner cavity; a barrel lid detachably covering the opening of the barrel; a magnetic rod connected to the barrel lid and extending at least partially into the inner cavity, the magnetic rod being movable relative to the barrel along its extension direction; and a scraper plate disposed within the barrel and located along the extension path of the magnetic rod, the scraper plate having a first through hole through which the magnetic rod passes, the inner wall of the first through hole forming a clearance fit with the outer periphery of the magnetic rod to scrape away impurities as the magnetic rod moves. This demagnetizing mechanism can efficiently and conveniently remove impurities from the magnetic rod, ensuring demagnetization effect and reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing technology, and in particular to a demagnetizing mechanism for lithium battery slurry. Background Technology

[0002] As a core energy storage component in the new energy field, the removal of magnetic impurities during the slurry preparation process of lithium batteries directly affects the safety and cycle life of the cells. In existing technologies, lithium battery slurry demagnetization mechanisms mostly employ a structure where a magnetic rod is fixedly connected to a container, with the magnetic rod directly contacting the slurry to adsorb magnetic impurities. However, this type of demagnetization mechanism has the following problems in practical applications: 1. Difficult disassembly: The magnetic rod is fixed to the container by bolts or welding, requiring specialized tools for disassembly, which is cumbersome and time-consuming, severely impacting production efficiency. 2. Inconvenient cleaning: Magnetic impurities adsorbed on the surface of the magnetic rod need to be manually wiped away, which is not only labor-intensive but also prone to leaving impurities in the gaps of the magnetic rod, causing the demagnetization efficiency to decrease with repeated use. 3. Risk of sealing leakage: Frequent disassembly leads to accelerated wear of the sealing components (such as rubber sealing rings) at the interface, making the slurry prone to leakage, which contaminates the equipment, reduces the demagnetization effect, and increases equipment maintenance costs. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, this utility model provides a lithium battery slurry demagnetizing mechanism that can efficiently and conveniently remove impurities from the magnetic rod, ensuring the demagnetizing effect and reducing maintenance costs.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a lithium battery slurry demagnetization mechanism, comprising:

[0005] The barrel has an inner cavity and an opening for containing slurry, and the barrel is provided with an inlet, an outlet and a drain inlet communicating with the inner cavity;

[0006] A bucket lid that detachably covers the opening of the bucket body;

[0007] A magnetic rod, which is connected to the bucket lid and extends at least partially into the inner cavity, and is movable relative to the bucket body along the direction of extension of the magnetic rod;

[0008] A scraper is disposed inside the barrel and located on the extension path of the magnetic rod. The scraper has a first through hole through which the magnetic rod passes. The inner wall of the first through hole forms a clearance fit with the outer periphery of the magnetic rod to scrape off impurities when the magnetic rod moves.

[0009] This lithium battery slurry demagnetizing mechanism features a detachable lid and body design for easy disassembly. Because the lid and body are separable, and the magnetic rod is attached to the lid, the lid can move the magnetic rod relative to the body along its extension direction. Combined with the gap between the first through-hole of the scraper and the outer circumference of the magnetic rod, surface impurities are automatically scraped off during the rod's movement, eliminating the need for manual wiping and effectively simplifying the impurity cleaning process, thus improving cleaning efficiency. Simultaneously, it avoids the difficulties of disassembly and impurity residue associated with traditional fixed connection structures, ensuring the stability of the demagnetizing effect.

[0010] Optionally, a guide assembly is also included. The guide assembly comprises a guide sleeve connected to the barrel body and a slide rod disposed within the guide sleeve. One end of the slide rod is slidably connected to the guide sleeve, and the other end is connected to the barrel lid. The guide sleeve extends axially along the barrel body. This guide assembly, through the sliding engagement of the guide sleeve and the slide rod, provides precise guidance for the movement of the barrel lid and the magnetic rod, effectively limiting swaying, ensuring the coaxiality of the magnetic rod and the through-hole of the scraper, avoiding incomplete scraping or component wear due to misalignment, and improving the operational stability and service life of the mechanism.

[0011] Optionally, the system also includes a cylinder connected to the barrel body, wherein the piston rod of the cylinder is arranged parallel to the magnetic rod, and the extended end of the piston rod is connected to the barrel lid; there is at least one cylinder, evenly distributed along the circumference of the barrel body. The cylinder-driven automated operation of moving the magnetic rod replaces manual pulling, reducing labor intensity; the evenly distributed cylinders ensure balanced force on the barrel lid, preventing skewing during magnetic rod movement, resulting in smoother and more efficient scraping action, and adapting to continuous production requirements.

[0012] Optionally, the bucket lid is provided with a second through hole corresponding to the first through hole, and the magnetic rod is disposed through the second through hole. A sealing element for sealing the gap between the magnetic rod and the bucket lid is provided in the second through hole. The sealing element in the second through hole effectively prevents the slurry from leaking along the gap between the magnetic rod and the bucket lid, avoiding material waste and equipment contamination.

[0013] Optionally, the magnetic rod and the bucket lid are detachably connected, including threaded connection, snap-fit ​​connection, or magnetic connection. This detachable connection design allows for quick disassembly of the magnetic rod for individual maintenance or replacement, adapting to application scenarios with varying magnetic field strength requirements. Compared to traditional fixed connections, this design effectively reduces maintenance difficulty and downtime.

[0014] Optionally, the top of the barrel has an opening, the scraper is fixed to the opening, and the barrel lid covers the opening and fits against the sealing ring on the scraper. The discharge port is located below the scraper and close to the opening, while the inlet and drain are located at the bottom of the barrel. The sealing ring between the scraper and the barrel lid enhances the top sealing effect, preventing slurry from overflowing from the opening. The design of the discharge port being close to the opening and the inlet being located at the bottom creates an upward flow path for the slurry within the barrel, extending the contact time with the magnetic rod and improving demagnetization efficiency. Simultaneously, bottom discharge reduces slurry residue.

[0015] Optionally, a spray pipe is provided on the side of the bucket lid facing the scraper, and the spray pipe is equipped with at least one nozzle. A connecting pipe passes through the bucket lid, with one end connected to the spray pipe and the other end connected to the cleaning solvent storage tank. The connection between the spray pipe and the cleaning solvent storage tank enables automatic cleaning of the magnetic rod, scraper, and inner wall of the bucket, replacing manual wiping and effectively improving cleaning efficiency. Solvent rinsing dissolves residual slurry, avoiding the problem of difficult-to-remove impurities after they dry, ensuring that the demagnetization effect is not affected during subsequent use.

[0016] Optionally, the spray pipe is annular and surrounds the magnetic rod, with multiple spray heads spaced circumferentially along the spray pipe. These spray heads are rotatable high-pressure nozzles. The annular spray pipe combined with the rotatable high-pressure nozzles enables 360° rinsing without blind spots. The high-pressure water flow effectively removes stubborn impurities, improving cleaning coverage compared to fixed nozzles. The rotating design allows a single nozzle to cover a larger area, reducing the number of nozzles, lowering energy consumption, and saving cleaning water.

[0017] Optionally, an electromagnetic coil is connected to the portion of the magnetic rod extending beyond the barrel body to adjust the magnetic field strength of the magnetic rod. The electromagnetic coil can continuously adjust the magnetic field strength by regulating the current, adapting to slurries of different viscosities. For example, high-viscosity positive electrode slurries require a strong magnetic field, while low-viscosity negative electrode slurries require a weak magnetic field. This dynamic adjustment capability improves demagnetization efficiency and has a wider range of applications compared to a fixed magnetic field design.

[0018] Optionally, the bottom of the tank is provided with an interconnected drain pipe and feed pipe. One end of the drain pipe is connected to the inner cavity, and the other end forms a drain outlet. One end of the feed pipe is connected to the drain pipe, and the other end forms a feed outlet. Connecting the drain pipe and feed pipe allows residual impurities in the feed pipe to be discharged through the drain outlet, effectively preventing impurities from accumulating in the feed pipe and contaminating subsequent slurry. Furthermore, the discharge pipe, drain pipe, and feed pipe at the outlet can use clamp-type quick-connect couplings, with fluororubber sealing rings at the couplings. Clamp-type quick-connect couplings allow for quick disassembly and installation of the pipes, adapting to the needs of rapid production line changes; the fluororubber sealing rings have resistance to slurry corrosion, helping to reduce maintenance costs.

[0019] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0020] 1. The detachable design of the lid and body and the detachable connection structure of the magnetic rod enable quick assembly and disassembly of key components, facilitating daily maintenance and component replacement, and effectively reducing operational complexity.

[0021] 2. With the help of automated drive and scraper, impurities can be automatically removed during the movement of the magnetic rod, reducing manual intervention, optimizing the convenience and stability of the cleaning process, and improving continuous operation capability.

[0022] 3. The multi-seal design effectively blocks the leakage path of slurry. Combined with the application of corrosion-resistant materials, it enhances the sealing performance and reliability of the equipment during operation, and reduces material waste and equipment contamination risks.

[0023] 4. The adjustable magnetic field strength enables the equipment to adapt to the demagnetization requirements of slurries with different characteristics, improves the adaptability to changes in process parameters, and enhances the flexibility of application scenarios.

[0024] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the demagnetizing mechanism in an embodiment of this utility model;

[0027] Figure 2This is a schematic diagram of the bucket lid and bucket body separated in an embodiment of this utility model;

[0028] Figure 3 This is a cross-sectional view of the bucket lid and bucket body separated in an embodiment of this utility model;

[0029] Figure 4 This is a schematic diagram of the assembly of the barrel and the scraper in an embodiment of this utility model;

[0030] Figure 5 This is a schematic diagram of the assembly state of the bucket lid and the magnetic rod in an embodiment of this utility model.

[0031] The reference numerals in the above figures are as follows: 1. Barrel body; 2. Barrel lid; 21. Second through hole; 22. Spray pipe; 23. Connecting pipe; 3. Magnetic rod; 4. Scraper; 41. First through hole; 5. Feed pipe; 51. Feed inlet; 6. Drain pipe; 61. Drain outlet; 7. Discharge pipe; 71. Discharge outlet; 8. Guide assembly; 81. Guide sleeve; 82. Slide rod. Detailed Implementation

[0032] 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.

[0033] Example 1: See Figure 1-3 As shown, a lithium battery slurry demagnetizing mechanism includes a barrel body 1, a barrel cover 2 detachably fitted onto the opening of the barrel body 1, and a magnetic rod 3 connected to the barrel cover 2. At least a portion of the magnetic rod 3 is located inside the barrel body 1. A scraper plate 4 is provided inside the barrel body 1 and along the extension path of the magnetic rod 3. The scraper plate 4 has a first through hole 41 through which the magnetic rod 3 passes. The inner wall of the first through hole 41 forms a clearance fit with the outer periphery of the magnetic rod 3 so as to scrape off impurities when the magnetic rod 3 moves.

[0034] In one optional embodiment, the barrel 1 is made of 316L stainless steel in a cylindrical shape, with an inner cavity that accommodates the slurry. The top of the barrel 1 has a circular opening that mates with the lid 2. An extension forms outward from the opening for connection with the lid 2. A first connecting hole is provided on the extension, and a corresponding second connecting hole is provided on the lid 2. A bolt passing through the first and second connecting holes allows for a separable connection between the barrel 1 and the lid 2. The scraper 4 is fixed to the opening of the barrel 1, and when the lid 2 closes the opening, it fits tightly against the sealing ring on the scraper 4. The scraper 4 and the barrel 1 can be fixed by snap-fitting, bolting, or welding to ensure its stability within the barrel 1.

[0035] In an optional embodiment, a discharge pipe 7 is provided on the side wall of the barrel 1 near the scraper 4. One end of the discharge pipe 7 is connected to the inner cavity of the barrel 1, and the other end forms a discharge port 71. A drain pipe 6 and a feed pipe 5 are connected to each other at the bottom of the barrel 1. Optionally, the drain pipe 6 is vertically arranged, with its top connected to the inner cavity and its bottom forming a drain port 61. The feed pipe 5 is horizontally arranged, with one end connected to the middle of the drain pipe 6 and the other end forming a feed port 51.

[0036] In one alternative embodiment, the bottom of the barrel 1 is conical, and the inlet of the drain pipe 6 is located at the center of the bottom of the conical surface. This ensures that impurities are discharged smoothly and do not remain inside the barrel 1.

[0037] In an optional embodiment, the discharge pipe 7, the drain pipe 6, and the feed pipe 5 all adopt clamp-type quick-connect joints, and the quick-connect joints are equipped with fluororubber sealing rings. Clamp-type quick-connect joints enable rapid disassembly and installation of the pipes, adapting to the needs of rapid production line changes; the fluororubber sealing rings have the characteristic of being resistant to slurry corrosion, helping to reduce maintenance costs.

[0038] In one alternative implementation, see Figure 4 As shown, the scraper plate 4 can be a circular plate adapted to the inner wall of the barrel 1. The scraper plate 4 is made of a wear-resistant, low-friction coefficient material, such as polytetrafluoroethylene (PTFE), to ensure it is not easily worn during long-term use. Its thickness can be designed to fit the structural strength requirements. The scraper plate 4 has multiple first through holes 41, the diameter of which is clearance-fitted with the outer diameter of the magnetic rod 3. The inner wall of the through hole can be a smooth curved surface. The multiple first through holes 41 are arranged in a honeycomb pattern on the scraper plate 4, ensuring that the slurry in all parts of the barrel 1 can be effectively adsorbed by the magnetic rod 3. Optionally, the gap between the first through hole 41 and the magnetic rod 3 is 0.5-1 mm.

[0039] In one alternative implementation, see Figure 5As shown, the bucket lid 2 is made of the same 316L stainless steel as the bucket body 1 to ensure the corrosion resistance of the overall structure. The bucket lid 2 can be designed as a circular plate structure with a diameter slightly larger than the opening of the bucket body 1, covering the outer extension of the bucket body 1. When the bucket lid 2 closes the opening, the bucket lid 2 fits tightly with the sealing ring on the scraper plate 4; at the same time, the connection surface between the bucket lid 2 and the outer extension of the bucket body 1 can also be provided with a matching sealing structure to improve the sealing performance of the slurry inside the bucket and reduce the risk of leakage. The bucket lid 2 is provided with a second through hole 21 corresponding to the first through hole 41 of the scraper plate 4. The diameter of the second through hole 21 forms a clearance fit with the outer diameter of the magnetic rod 3 to ensure that the magnetic rod 3 can pass through smoothly. The magnetic rod 3 is inserted through the second through hole 21, and a sealing element can be installed in the through hole to prevent the slurry from leaking along the gap between the magnetic rod 3 and the bucket lid 2. This sealing element can be made of an elastic material that is wear-resistant and resistant to media corrosion.

[0040] In one optional embodiment, the magnetic rod 3 is a cylindrical rod with one end extending downwards to near the bottom of the barrel 1 and the other end extending beyond the barrel lid 2. The magnetic rod 3 and the barrel lid 2 are detachably connected, and the detachable connection includes a threaded connection, a snap-fit ​​connection, or a magnetic connection.

[0041] In an optional embodiment, an electromagnetic coil can be connected to one end of the magnetic rod 3 that extends outside the bucket lid 2. The electromagnetic coil is connected to an external control device. By adjusting the current intensity of the electromagnetic coil, the magnetic field intensity can be dynamically controlled, which helps to enhance the adsorption effect on impurities in the slurry and meet the adsorption requirements of different slurries.

[0042] In an optional embodiment, the lithium battery slurry demagnetizing mechanism further includes a guide assembly 8, which includes a guide sleeve 81 connected to the barrel 1 and a slide rod 82 disposed within the guide sleeve 81. The guide sleeve 81 has a cylindrical guide hole, the inner wall of which can be fitted with a wear-resistant bushing. The slide rod 82 is a cylindrical rod adapted to the guide hole, and its surface can be chrome-plated or nitrided to improve wear resistance. One end of the slide rod 82 is slidably connected to the guide sleeve 81 with a clearance fit, and the other end is fixed to the barrel cover 2 by bolts or welding. The guide sleeve 81 extends axially along the barrel 1, and its bottom can be connected to the outer wall of the barrel 1 via a flange or clamp structure. Two guide assemblies 8 can be symmetrically arranged radially along the barrel 1 to form symmetrical support. Lubricating grease can be periodically injected into the slide rod 82 and the guide sleeve 81 through an grease injector to reduce frictional resistance. The guide assembly 8 provides axial guidance for the movement of the bucket lid 2 and the magnetic rod 3 through the sliding engagement of the guide sleeve 81 and the slide rod 82, effectively limiting radial sway, ensuring the coaxiality of the magnetic rod 3 and the first through hole 41 of the scraper plate 4, avoiding incomplete scraping or component wear caused by misalignment, and improving the stability and service life of the mechanism.

[0043] In an optional embodiment, the lithium battery slurry demagnetizing mechanism further includes cylinders (not shown in the figure) connected to the barrel 1. The cylinders are fixed to the outer wall of the barrel 1, and the piston rod of the cylinder is arranged parallel to the magnetic rod 3. The extended end of the piston rod is connected to the barrel cover 2. Two to four cylinders are evenly distributed around the circumference of the barrel 1, corresponding one-to-one with the guide assembly 8. The cylinder inlet is connected to the air source pipeline through a solenoid valve, which is electrically connected to an external control system, enabling automated control of piston rod extension and retraction and synchronization of multiple cylinder actions. The automated operation of moving the magnetic rod 3 is achieved by cylinder drive, replacing manual pulling and reducing labor intensity. The evenly distributed cylinders around the circumference ensure the barrel cover 2 is subjected to balanced force, preventing the magnetic rod 3 from tilting during movement, resulting in a smoother and more efficient scraping action, which is suitable for continuous production needs.

[0044] In an optional embodiment, the barrel cover 2 is provided with a spray pipe 22 on the side facing the scraper 4, the spray pipe 22 is provided with at least one nozzle, and a connecting pipe 23 is provided through the barrel cover 2, one end of the connecting pipe 23 is connected to the spray pipe 22, and the other end is connected to the cleaning solvent storage tank.

[0045] In one optional embodiment, the spray pipe 22 is annular and arranged around the magnetic rod 3, and a plurality of spray heads are spaced apart along the circumferential direction on the spray pipe 22, and the spray heads are rotatable high-pressure spray heads.

[0046] In practical use, when cleaning the magnetic rod 3 is required, first close the valve of the feed pipe 5, and the cylinder drives the barrel cover 2 to rise along the guide assembly 8, simultaneously moving the magnetic rod 3 axially. As the magnetic rod 3 passes upward through the scraper plate 4, the magnetic impurities adsorbed on its surface are scraped off by the inner wall of the first through hole 41 of the scraper plate 4, and the impurities fall into the bottom of the inner cavity of the barrel 1 under the action of gravity. After scraping is completed, the cylinder piston rod retracts, driving the barrel cover 2 to reset, allowing the magnetic rod 3 to be reinserted into the slurry; after the barrel cover 2 and the barrel 1 are sealed together, the control system starts the spray system, and the cleaning solvent enters the annular spray pipe 22 through the connecting pipe 23, and is sprayed through the rotatable high-pressure nozzle to thoroughly rinse the surface of the scraper plate 4 and the magnetic rod 3. The impurities are discharged with the cleaning waste liquid through the drain port 61. The entire cleaning process is automated and closed-loop controlled to ensure that the surface cleanliness of the magnetic rod 3 meets the requirements of continuous production.

[0047] This utility model uses specific embodiments to illustrate the principle and implementation of the utility model. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the utility model. Therefore, the content of this specification should not be construed as a limitation of the utility model.

Claims

1. A lithium battery slurry demagnetization mechanism, characterized by, include: The barrel has an inner cavity and an opening for containing slurry, and the barrel is provided with an inlet, an outlet and a drain inlet communicating with the inner cavity; A bucket lid that detachably covers the opening of the bucket body; A magnetic rod, which is connected to the bucket lid and extends at least partially into the inner cavity, and is movable relative to the bucket body along the direction of extension of the magnetic rod; A scraper is disposed inside the barrel and located on the extension path of the magnetic rod. The scraper has a first through hole through which the magnetic rod passes. The inner wall of the first through hole forms a clearance fit with the outer periphery of the magnetic rod to scrape off impurities when the magnetic rod moves.

2. The lithium battery slurry de-magnetizer mechanism of claim 1, wherein, It also includes a guide assembly, which includes a guide sleeve connected to the barrel body and a slide rod disposed within the guide sleeve. One end of the slide rod is slidably connected to the guide sleeve, and the other end is connected to the barrel lid. The guide sleeve extends along the axial direction of the barrel body.

3. The lithium battery slurry de-magnetizer mechanism of claim 1, wherein, It also includes a cylinder connected to the barrel body, the piston rod of the cylinder being arranged parallel to the magnetic rod, and the extended end of the piston rod being connected to the barrel lid; there is at least one cylinder, which is evenly distributed along the circumference of the barrel body.

4. The lithium battery slurry de-magnetizer mechanism of claim 1, wherein, The bucket lid is provided with a second through hole corresponding to the first through hole, and the magnetic rod is inserted through the second through hole. The second through hole is provided with a sealing element for sealing the gap between the magnetic rod and the bucket lid.

5. The lithium battery slurry de-magnetizer mechanism of claim 1, wherein, The magnetic rod and the bucket lid are detachably connected, and the detachable connection includes threaded connection, snap-fit ​​connection or magnetic connection.

6. The lithium battery slurry demagnetization mechanism according to claim 1, characterized in that, The top of the barrel has an opening, the scraper is fixed to the opening, the barrel lid covers the opening and fits against the sealing ring on the scraper; the discharge port is located below the scraper and close to the opening, and the feed port and drain port are located at the bottom of the barrel.

7. The lithium battery slurry de-magnetizer mechanism of claim 1, wherein, The barrel lid is provided with a spray pipe on the side facing the scraper, and the spray pipe is provided with at least one nozzle. A connecting pipe is provided through the barrel lid, one end of which is connected to the spray pipe and the other end is connected to the cleaning solvent storage tank.

8. The lithium battery slurry de-magnetizer mechanism of claim 7, wherein, The spray pipe is annular and surrounds the magnetic rod. Multiple nozzles are spaced apart along the circumference of the spray pipe. Each nozzle is a rotatable high-pressure nozzle.

9. The lithium battery slurry de-magnetizer mechanism of claim 5, wherein, An electromagnetic coil is connected to the end of the magnetic rod that extends out of the barrel, which is used to adjust the magnetic field strength of the magnetic rod.

10. The lithium battery slurry de-magnetizer mechanism of claim 1, wherein, The bottom of the barrel is provided with a drain pipe and a feed pipe that are interconnected. One end of the drain pipe is connected to the inner cavity and the other end forms a drain outlet. One end of the feed pipe is connected to the drain pipe and the other end forms a feed outlet.

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