Modular magnetic wand device

Abstract

The utility model discloses a modularization magnetic rod device, including a plurality of modularization magnetic rod unit, the modularization magnetic rod unit head -to -tail splicing of adjacent, and the modularization magnetic rod unit includes stainless steel outer tube, the inside of stainless steel outer tube is provided with built -in magnetic block, and the both ends of built -in magnetic block are equipped with silicon steel shield layer, and the both ends of modularization magnetic rod unit are equipped for the end connecting structure of head -to -tail. The modularization magnetic rod device is provided, and the free combination and second level switching of long / short magnetic rod are realized through the innovation of magnetic unit standardization design and quick -joint mechanism, the scheme breaks through traditional fixed structure, establishes magnetic rod component library, and makes single set of equipment can cover whole process demand, and the splicing type design can be combined modularization magnetic rod unit through end connecting structure according to different process required, realizes coating, roll pressing, slitting etc. Process, only needs one kind of magnetic rod unit, realizes the effective adsorption of magnetic foreign matter on the surface of pole piece, and further guarantees the production quality of battery.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, specifically to a modular magnetic rod device. Background Technology

[0002] In the manufacturing process of lithium-ion battery electrodes, the control of magnetic foreign objects is a core barrier in building a battery safety defense. Ferromagnetic impurities (such as metal particles like Fe, Ni, and Co) remaining on the electrode surface can penetrate the separator and form conductive channels, causing micro-short circuits in the battery. These microscopic defects continue to worsen during charging and discharging, causing the battery's self-discharge rate to soar by 30% to 50%, the cycle life to decrease by more than 40%, and potentially leading to extreme safety hazards such as thermal runaway.

[0003] The existing production system faces a dilemma in process adaptability: the wide substrates used in the coating / rolling process require the magnetic rods to effectively adsorb a width of at least 1200mm; while the slitting process is limited by the spacing between the slitting cutters, and the winding process is constrained by the confined space, both of which can only use short magnetic rods no longer than 500mm. Traditional solutions adopt a "one process, one equipment" configuration model, which requires multiple sets of dedicated magnetic rods on the production line, resulting in high equipment costs, complex warehousing management, and the need to stop the machine for adjustment when changing magnetic rods, affecting production efficiency. At the same time, the magnetic rod calibration parameter library has expanded to more than a hundred sets, significantly increasing the complexity of production management. Utility Model Content

[0004] The technical problem to be solved by this utility model is: how to solve the problem of large differences in the requirements for magnetic rod length in the coating, rolling and slitting stages of lithium battery production.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A modular magnetic rod device includes several modular magnetic rod units, with adjacent modular magnetic rod units connected end to end by a snap-fit ​​mechanism.

[0006] This application provides a modular magnetic rod device. Through standardized magnetic unit design and innovative quick-connect mechanism, it enables free combination and second-level switching of long / short magnetic rods. This solution breaks through the traditional fixed structure, establishes a magnetic rod component library, and allows a single set of equipment to cover the needs of the entire process. The splicing design allows for the rapid combination of modular magnetic rod units according to the needs of different processes through end connection structures, realizing processes such as coating, rolling, and slitting. Only one type of magnetic rod unit is needed to effectively adsorb magnetic foreign matter on the electrode surface, thereby ensuring the production quality of the battery, which has significant practical significance for production.

[0007] As a further embodiment of this utility model: the modular magnetic rod unit has end connection structures at both ends, wherein the end connection structure at one end has a convex buckle for connecting the head and tail, and the end connection structure at the other end has a concave groove for connecting the head and tail.

[0008] This application designs various ways of arranging magnetic blocks to facilitate operation by staff and improve the flexibility of this application.

[0009] As a further embodiment of this utility model: the modular magnetic rod unit includes a stainless steel outer tube, an internal magnetic block is provided inside the stainless steel outer tube, the two ends of the internal magnetic block are provided with silicon steel shielding layers, and the end connection structure is made of stainless steel.

[0010] As a further embodiment of this invention: the built-in magnetic block includes one of the following: a plurality of magnetic blocks arranged alternately in a transverse N-S configuration; or a plurality of magnetic blocks arranged alternately in a axial N-S configuration; or a plurality of Halbach permanent magnet blocks arranged in an array. As a further embodiment of this utility model: the thickness of the silicon steel shielding layer is 0.1-2 mm, preferably 0.1-0.3 mm, so that the magnetic field strength at both ends of the modular magnetic rod unit is ≤500Gs, avoiding magnetic field repulsion interference during splicing.

[0011] As a further embodiment of this invention, the modular magnetic rod unit is internally filled with epoxy resin.

[0012] As a further embodiment of this utility model: the length of the modular magnetic rod unit is 50-800 mm, preferably 100-500 mm; the width of the modular magnetic rod unit is 20-200 mm, preferably 40-80 mm; the height of the modular magnetic rod unit is 10-100 mm, preferably 20-40 mm; and the outer tube wall thickness of the modular magnetic rod unit is 0.1-2 mm, preferably 0.3-0.5 mm.

[0013] As a further embodiment of this utility model: the end connection structure is connected to the edge of both end faces of the modular magnetic rod unit, and the end connection structure is "L-shaped".

[0014] As a further embodiment of this utility model: the end connection structure has a groove on the end face of the modular magnetic rod unit, and the inner walls of the grooves of the two end connection structures are respectively provided with convex buckles or concave slots that enable adjacent modular magnetic rod units to interlock with each other.

[0015] As a further aspect of this utility model: the thickness of the end connection structure is 0.1-1mm, and the groove width is 0.1-1mm; the material of the end connection structure is stainless steel; the stainless steel surface of the end connection structure is subjected to nitriding hardening treatment to extend the insertion and removal life.

[0016] Compared with the prior art, the beneficial effects of this utility model are: This application utilizes an end-connection structure to rapidly assemble modular magnetic rod units according to the needs of different processes. This allows processes such as coating, rolling, and slitting to require only one type of magnetic rod unit, reducing the number of magnetic rod specifications and quantities, lowering equipment procurement costs by over 50%, and reducing storage space by 70%. The modular magnetic rod splicing process takes less than 5 seconds per assembly (compared to 10 minutes for traditional bolt connections), increasing efficiency by 120 times. When adjusting product dimensions, changing the electrode width can be done without stopping the machine, reducing annual downtime losses by over 200,000 yuan. Independent unit replacement reduces maintenance costs by 70% (single maintenance cost drops from 3,000-8,000 yuan to 200-500 yuan). This utility model, with "one rod adaptable to all processes" as its core, overcomes the industry problem of fixed length in traditional magnetic rods, fills the industry gap in splicing performance, and achieves a triple leap in cost, efficiency, and lifespan. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the modular magnetic rod device according to an embodiment of the present invention; Figure 2 This is a partial cross-sectional view of the modular magnetic rod device according to an embodiment of the present invention; Figure 3 This is a three-dimensional enlarged schematic diagram of the end connection structure in operation according to an embodiment of the present utility model; Figure 4 This is a three-dimensional structural diagram of multiple modular magnetic rod devices connected to form an integral magnetic rod according to an embodiment of the present invention. Explanation of reference numerals in the attached figures: 1. Modular magnetic rod unit; 2. Stainless steel outer tube; 3. Built-in magnetic block; 4. Silicon steel shielding layer; 5. Epoxy resin; 6. End connection structure. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] Example 1 Reference Figure 1 and Figure 2 A modular magnetic rod device includes a modular magnetic rod unit 1, a stainless steel outer tube 2, an internal magnetic block 3, a silicon steel shielding layer 4, epoxy resin 5, and an end connection structure 6. The modular magnetic rod unit 1 is made of stainless steel, and the outer surface of the modular magnetic rod unit 1 is smooth. The interior of the modular magnetic rod unit 1 is filled with epoxy resin 5 to enhance bending resistance. The modular magnetic rod unit 1 is in the shape of a cuboid or a cylinder, preferably a rectangle. The end connection structure 6 is made of stainless steel, and the stainless steel surface is nitrided and hardened to enhance insertion and extraction life.

[0020] The modular magnetic rod unit 1 has a length of 120 mm, a width of 60 mm, and a height of 20 mm. The outer side of the modular magnetic rod unit 1 is a 316L stainless steel tube with a wall thickness of 0.4 mm. Several built-in magnetic blocks 3 are arranged alternately in the horizontal N-S direction. Both ends of the modular magnetic rod unit 1 are covered with a 0.3 mm silicon steel shielding layer 4. The end connection structure 6 is an "L-shaped" structure located at both ends of the modular magnetic rod unit 1 and is integrally formed with the modular magnetic rod unit 1. The end connection structure 6 has a groove at the end face of the modular magnetic rod unit 1. The inner walls of the grooves of the two end connection structures 6 are respectively provided with convex buckles or concave slots that allow adjacent modular magnetic rod units 1 to interlock. The groove width of the end connection structure 6 is 0.3 mm. The opening of one end connection structure 6 is located at the top, and a convex buckle is provided at 10 mm of its inner long side. The opening of the other end connection structure 6 is located at the bottom, and a concave slot corresponding to the convex buckle is provided at 10 mm of its inner long side. When two subsequent modular magnetic rod units 1 are spliced, the end connection structure 6 at the rear end of the previous modular magnetic rod unit 1 engages with the end connection structure 6 at the front end of the next modular magnetic rod unit 1. The two end connection structures 6 are engaged by the convex buckle and the concave slot, thereby realizing the splicing of several subsequent modular magnetic rod units 1.

[0021] The three modular magnetic rod units 1, when spliced ​​together, have a total length of 360mm. They are suitable for the winding section and can be placed in the original magnetic rod position to replace the original complete magnetic rod for demagnetizing the pole pieces.

[0022] The seven modular magnetic rod units 1, when spliced ​​together, have a total length of 840mm. They are adapted to the slitting section and placed in the original magnetic rod position to replace the original complete magnetic rod for demagnetizing the pole pieces.

[0023] The fourteen modular magnetic rod units, when spliced ​​together, have a total length of 1680mm. They are suitable for coating and rolling processes, and can be placed in the original magnetic rod position to replace the original complete magnetic rod for demagnetizing the electrode sheets.

[0024] Tests showed that the magnetic rod of this invention has a working surface magnetic field strength of 1.2T and an end magnetic field strength of 450Gs, with a ferromagnetic impurity adsorption rate of ≥99.7% in each process.

[0025] Example 2 Unlike Embodiment 1, the modular magnetic rod unit 1 has a length of 150mm, a width of 40mm, and a height of 40mm. The outer side of the modular magnetic rod unit 1 is a 316L stainless steel tube with a wall thickness of 0.3mm, and several Halbach magnetic blocks 3 are arranged in an array inside, so that the magnetic force is concentrated on the working surface (the working surface is the side close to and parallel to the pole piece, that is, the front side of several built-in magnetic blocks). The two ends of the modular magnetic rod unit 1 are covered with a 0.1mm silicon steel shielding layer 4, the groove thickness of the end connecting structure 6 is 0.4mm, and the convex buckle and concave groove are located at 20mm on the long side of the end connecting structure 6.

[0026] The three modular magnetic rod units 1, when spliced ​​together, have a total length of 450mm. They are suitable for the winding section and can be placed in the original magnetic rod position to replace the original complete magnetic rod for demagnetizing the pole pieces.

[0027] The six modular magnetic rod units, when spliced ​​together, have a total length of 900mm. They are adapted to the slitting section and placed in the original magnetic rod position to replace the original complete magnetic rod for demagnetizing the pole pieces.

[0028] The eleven modular magnetic rod units, when spliced ​​together, have a total length of 1750mm. They are suitable for coating and rolling processes, and can be placed in the original magnetic rod position to replace the original complete magnetic rod for demagnetizing the pole pieces.

[0029] Tests showed that the magnetic rod of this invention has a working surface magnetic field strength of 0.6T and an end magnetic field strength of 127Gs, with a ferromagnetic impurity adsorption rate of ≥99.9% in each process.

[0030] Example 3 Unlike Embodiment 1, the modular magnetic rod unit 1 has a length of 200 mm, a width of 50 mm, and a height of 40 mm. The outer side of the modular magnetic rod unit 1 is a 316L stainless steel tube with a wall thickness of 0.4 mm. It contains several built-in magnetic blocks 3 with alternating axial N and N directions, so that the magnetic force is concentrated on the working surface (the working surface is the side close to and parallel to the pole piece, i.e., the front side of several built-in magnetic blocks). The two ends of the modular magnetic rod unit 1 are covered with a 0.2 mm silicon steel shielding layer. The groove thickness of the end connection structure 6 is 0.4 mm. The convex buckle and concave groove are located at 20 mm from the long side of the end connection structure 6.

[0031] The two modular magnetic rod units, when spliced ​​together, have a total length of 400mm. They are suitable for the winding section and can be placed in the original magnetic rod position to replace the original complete magnetic rod for demagnetizing the pole pieces.

[0032] The four modular magnetic rod units, when spliced ​​together, have a total length of 800mm. They are adapted to the slitting section and placed in the original magnetic rod position to replace the original complete magnetic rod for demagnetizing the pole pieces.

[0033] The total length of the eight modular magnetic rod units is 1600mm after splicing. They are suitable for coating and rolling processes. They can be placed in the original magnetic rod position to replace the original complete magnetic rod for demagnetizing the pole pieces.

[0034] Tests showed that the magnetic rod of this invention has a working surface magnetic field strength of 1.2T and an end magnetic field strength of 342Gs, with a ferromagnetic impurity adsorption rate of ≥99.7% in each process.

[0035] This application utilizes an end-connection structure to rapidly assemble modular magnetic rod units according to the needs of different processes. This allows processes such as coating, rolling, and slitting to require only one type of magnetic rod unit, reducing the number of magnetic rod specifications and quantities, lowering equipment procurement costs by over 50%, and reducing storage space by 70%. The modular magnetic rod splicing process takes less than 5 seconds per assembly (compared to 10 minutes for traditional bolt connections), increasing efficiency by 120 times. When adjusting product dimensions, changing the electrode width can be done without stopping the machine, reducing annual downtime losses by over 200,000 yuan. Independent unit replacement reduces maintenance costs by 70% (single maintenance cost drops from 3,000-8,000 yuan to 200-500 yuan). This utility model, with "one rod adaptable to all processes" as its core, overcomes the industry problem of fixed length in traditional magnetic rods, fills the industry gap in splicing performance, and achieves a triple leap in cost, efficiency, and lifespan.

[0036] In summary, compared with the prior art, this utility model provides a modular magnetic rod that can be quickly assembled into modular magnetic rod units according to the needs of different processes through end connection structures. This allows for processes such as coating, rolling, and slitting to require only one type of magnetic rod unit, effectively adsorbing magnetic foreign matter on the electrode surface, thereby ensuring the production quality of the battery. This has significant practical significance for production.

[0037] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A modular magnetic rod device, characterized in that, It includes several modular magnetic rod units (1), and adjacent modular magnetic rod units (1) are connected end to end by a snap-fit ​​method.

2. The modular magnetic rod device according to claim 1, characterized in that: The modular magnetic rod unit (1) has end connection structures (6) at both ends. One end connection structure (6) has a convex buckle for connecting the head and tail, and the other end connection structure (6) has a concave groove for connecting the head and tail.

3. A modular magnetic rod device according to claim 2, characterized in that: The modular magnetic rod unit (1) includes a stainless steel outer tube (2), and an internal magnetic block (3) is provided inside the stainless steel outer tube (2). The two ends of the internal magnetic block (3) are provided with silicon steel shielding layers (4), and the end connection structure (6) is made of stainless steel.

4. A modular magnetic rod device according to claim 3, characterized in that: The built-in magnetic block (3) includes one of the following: a plurality of magnetic blocks arranged alternately in the horizontal direction (NS); or a plurality of magnetic blocks arranged alternately in the axial direction (NS); or a plurality of Halbach permanent magnet blocks arranged in an array.

5. A modular magnetic rod device according to claim 3, characterized in that: The thickness of the silicon steel shielding layer (4) is 0.1 to 2 mm.

6. A modular magnetic rod device according to claim 2, characterized in that: The modular magnetic rod unit (1) is internally filled with epoxy resin (5).

7. A modular magnetic rod device according to claim 1, characterized in that: The modular magnetic rod unit (1) has a length of 50-800 mm, a width of 20-200 mm, a height of 10-100 mm, and an outer tube wall thickness of 0.1-2 mm.

8. A modular magnetic rod device according to claim 2, characterized in that: The end connection structure (6) is connected to the edge of the two end faces of the modular magnetic rod unit (1), and the end connection structure (6) is "L-shaped".

9. A modular magnetic rod device according to claim 8, characterized in that: The end connection structure (6) has a groove at the end face of the modular magnetic rod unit (1), and the inner walls of the grooves of the two end connection structures (6) are respectively provided with convex buckles or concave slots that enable adjacent modular magnetic rod units (1) to snap together.

10. A modular magnetic rod device according to claim 8, characterized in that: The thickness of the end connection structure (6) is 0.1-1 mm, and the groove width is 0.1-1 mm.

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