Portable magnetic bar device for battery production

Abstract

The utility model belongs to lithium ion battery technical field, concretely relates to a portable magnetic rod device for battery production, including magnetic rod module, mobile adjusting mechanism and impurity collection area, the magnetic rod module includes magnetic core, protective housing and magnetic layer, the magnetic core is permanent magnet, the protective housing covers the magnetic core, the magnetic layer is filled between the magnetic core with the protective housing, mobile adjusting mechanism includes base, telescopic vertical rod and rotary arm, the base is used for fixing device on the equipment surface, the telescopic vertical rod and rotary arm are used for adjusting the position of magnetic rod module in three -dimensional space, the impurity collection area is located below the magnetic rod module, is used for collecting the magnetic impurity of being adsorbed, the magnetic rod module is connected with mobile adjusting mechanism through quick -release interface. The portable magnetic rod device of this patent adopts high magnetic energy product permanent magnet and combines nanocrystalline alloy magnetic layer, and the magnetic field intensity and uniformity are improved significantly.

Description

Technical Field

[0001] This utility model belongs to the field of lithium-ion battery technology, specifically relating to a convenient magnetic rod device used in battery production. Background Technology

[0002] Currently, lithium-ion batteries are widely used in consumer electronics, electric vehicles, energy storage systems, and many other fields. The market has placed higher demands on battery safety, lifespan, and fast-charging performance. Metallic magnetic foreign objects inside the battery (such as iron filings and nickel particles) are one of the key factors affecting battery safety and reliability. These impurities may cause micro-short circuits during the battery formation process, leading to self-discharge; in finished product testing, they can cause problems such as reduced Hipot (withstand voltage) test resistance and AC interference, and in severe cases, even insulation breakdown, posing significant safety hazards.

[0003] In battery manufacturing, electrode fabrication, winding, and encapsulation are processes that are highly susceptible to generating and introducing metallic magnetic foreign matter. Current technologies commonly employ fixed magnetic rods, filters, or manual cleaning to adsorb and remove these impurities. However, these methods have significant shortcomings: First, the fixed position of the magnetic rod is not adjustable, making it difficult to adapt to different equipment positions and electrode / aluminum-plastic film specifications, resulting in limited adsorption coverage and cleaning dead zones. Second, cleaning and maintenance require machine shutdown and disassembly, severely impacting the continuity and efficiency of the production line. Third, traditional magnetic rods have limited magnetic force and uneven magnetic field distribution, resulting in insufficient capture efficiency for micron-sized (especially ≤50μm) magnetic particles, failing to meet increasingly stringent foreign matter control standards.

[0004] Therefore, existing technologies lack a device that can be flexibly integrated into production lines, achieve precise three-dimensional positioning, facilitate rapid disassembly and maintenance, and efficiently adsorb micron-sized magnetic foreign objects. To address this technological gap, this invention proposes a novel, portable magnetic rod device to solve the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a convenient magnetic rod device for battery production, thereby solving the technical problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a convenient magnetic rod device for battery production, comprising a magnetic rod module, a moving adjustment mechanism, and an impurity collection area; The magnetic rod module includes a magnetic core, a protective shell, and a magnetic conductive layer. The magnetic core is a permanent magnet, the protective shell covers the magnetic core, and the magnetic conductive layer fills the space between the magnetic core and the protective shell. The movable adjustment mechanism includes a base, a telescopic upright, and a rotating arm. The base is used to fix the device to the surface of the equipment, and the telescopic upright and the rotating arm are used to adjust the position of the magnetic rod module in three-dimensional space. The impurity collection area is located below the magnetic rod module and is a detachable transparent structure used to collect adsorbed magnetic impurities. The magnetic rod module is connected to the movable adjustment mechanism via a quick-release interface to enable rapid assembly and disassembly.

[0007] Preferably, the magnetic core has a square or circular structure with rounded edges and a radius of R1 to R3 mm.

[0008] Preferably, the magnetic core is made of neodymium iron boron N52 grade or sintered samarium cobalt permanent magnet with a surface magnetic field strength ≥10000Gs.

[0009] Preferably, the magnetic conductive layer is a nanocrystalline alloy or silicon steel sheet with a thickness of 0.3 to 1.0 mm.

[0010] Preferably, the base of the movable adjustment mechanism has a built-in strong magnet group or vacuum suction cup with an adsorption force ≥50N.

[0011] Preferably, the telescopic pole has an adjustment range of 10 to 150 mm or 300 to 1200 mm, and the rotating arm supports 360° rotation.

[0012] Preferably, the moving adjustment mechanism further includes a slider guide rail for adjusting the position of the magnetic rod module in the horizontal direction.

[0013] Preferably, the quick-release interface is a magnetic snap or a rotary snap.

[0014] Preferably, the quick-release interface supports the independent disassembly of a single magnetic rod module, with a replacement time of ≤30 seconds.

[0015] Preferably, the impurity collection area is located 5 mm directly below the magnetic rod module.

[0016] The beneficial effects of this invention are as follows: This patented portable magnetic rod device significantly improves the magnetic field strength and uniformity by using a high-energy-product permanent magnet (such as neodymium iron boron N52) combined with a nanocrystalline alloy magnetic conductive layer. It can efficiently capture micron-sized magnetic particles ≤50μm, with an impurity adsorption efficiency exceeding 95%. Simultaneously, the device achieves precise three-dimensional positioning through a telescopic upright, a 360° rotating arm, and a slider guide rail. This allows the magnetic rod to flexibly adapt to different equipment positions such as winding machines and packaging machines, effectively covering both sides of the electrode sheet and the surface of the aluminum-plastic film, thus solving the problems of blind spots and poor flexibility inherent in traditional fixed magnetic rods.

[0017] This device further enables rapid replacement and cleaning of the magnetic rod module and impurity collection area through magnetic snap-fit ​​or plug-in quick-release interfaces, with a single maintenance time of no more than 30 seconds. This significantly reduces equipment downtime and ensures the continuity and efficiency of the production line. Ultimately, this solution reduces the risk of battery micro-short circuits caused by metallic foreign objects at the source, resulting in a more than 15% increase in the pass rate of Hipot (withstand voltage) testing and a significant reduction in the battery self-discharge failure rate to below 99.5%, thus improving the overall battery safety performance and production yield. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional view of the magnetic rod module; Figure 3 For telescopic adjustment and fixed structure diagram; Figure 4 This is a structural diagram of a multi-directional adjustment bracket; Figure 5 This is a schematic diagram of Example 1; Figure 6 and Figure 7 This is a schematic diagram of Example 2. Detailed Implementation

[0019] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0020] This utility model provides a convenient magnetic rod device for battery production. Its core lies in the modular, quickly adjustable and detachable structural design, which enables efficient and flexible adsorption of magnetic foreign objects during the battery production process.

[0021] See Figures 1 to 4 The portable magnetic rod device mainly consists of a magnetic rod module 3, a moving adjustment mechanism, and an impurity collection area 6.

[0022] The magnetic rod module 3 is the core functional component of the device. Its magnetic core can be a square magnetic core 2 (e.g., 150mm long × 20mm wide × 10mm high) or a circular magnetic core 1 (e.g., 25mm in diameter), made of neodymium iron boron N52 grade permanent magnet with a surface magnetic field strength exceeding 10,000 Gauss. All edges of the magnetic core are rounded (rounded radius R2mm) to prevent scratching the sensitive battery electrodes 10 or aluminum-plastic film 11. The magnetic core is encased in a 1.0mm thick 304 stainless steel protective shell 4, which is electrolytically polished to withstand electrolyte corrosion. Between the magnetic core and the protective shell 4, a 0.5mm thick nanocrystalline alloy magnetic conductive layer 5 is filled. This magnetic conductive layer optimizes the magnetic field distribution, expanding the effective adsorption range by more than 20% and ensuring a uniform magnetic field, avoiding adsorption dead zones.

[0023] The movable adjustment mechanism is used to achieve precise positioning and fixation of the magnetic rod module 3 in three-dimensional space. This mechanism includes a base 8, which contains a set of strong magnets that can generate an attraction force of no less than 50N, allowing it to be quickly and firmly fixed to the metal surface of the winding or packaging machine. A telescopic upright 7 is vertically mounted on the base 8, with an adjustment range of 100-800mm to accommodate height differences in different equipment. A rotating arm 9 is connected to the top of the telescopic upright 7, allowing for 360° rotation. By adjusting the length of the telescopic upright 7 and the angle of the rotating arm 9, the magnetic rod module 3 can be precisely positioned to the optimal working position.

[0024] The impurity collection area 6 is a transparent, detachable box-shaped structure that is connected to the magnetic rod module 3 directly below (about 5mm away) by a snap-fit. It is used to collect and contain the adsorbed magnetic impurities. Its transparent design allows operators to visually observe the accumulation of impurities and thus determine when maintenance is needed.

[0025] The magnetic rod module 3 is connected to the end of the rotating arm 9 via a quick-release interface (such as a magnetic buckle or a rotary buckle), which allows a single magnetic rod module 3 to be independently disassembled and replaced within 30 seconds, greatly facilitating maintenance and combined use.

[0026] Example 1: Application in the winding process like Figure 1 and Figure 5 (Example 1) As shown, in the battery winding process, the installation position of the magnetic rod device 3 is first determined according to the conveyor belt path of the electrode 10 on the winding equipment. The base 8 is magnetically fixed to a flat metal surface near the guide roller of the winding machine. Then, by adjusting the height of the telescopic upright 7 and the angle of the rotating arm 9, the working surface of the magnetic rod module 3 is made parallel to the surface of the electrode 10, and the distance between them is precisely controlled at 5mm. During the production process, the magnetic impurities carried by the electrode 10 passing at high speed will be captured by the strong magnetic field and adhere to the protective shell 4, and finally fall into the impurity collection area 6 below under gravity or slight vibration. During maintenance, there is no need to stop the machine; the impurity collection area 6 can be directly removed for cleaning.

[0027] Example 2: Application in the packaging process like Figure 6 and Figure 7(Example 2) As shown, different installation methods can be selected according to the equipment structure during the battery packaging process. One method is to fix the device to the side frame of the packaging machine conveyor belt 13 by adsorption using the base 8, and adjust it by the telescopic upright 7 and the rotating arm 9 so that the magnetic rod module 3 is parallel to the surface of the aluminum-plastic film shell 11, with the spacing controlled at 5mm. Another method is to install a slider fixing rail 12 above the electrode assembly conveyor belt 13, connect the base 8 of the device to the slider on the guide rail 12 by screws, and adjust the position of the magnetic rod module 3 horizontally by sliding the slider so that it covers the electrode assembly surface to adsorb magnetic foreign objects that may be introduced during the packaging process.

[0028] For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A portable magnetic rod device for battery production, characterized in that, Includes a magnetic rod module (3), a moving adjustment mechanism, and an impurity collection area (6); The magnetic rod module (3) includes a magnetic core (1, 2), a protective shell (4), and a magnetic conductive layer (5). The magnetic core (1, 2) is a permanent magnet. The protective shell (4) covers the magnetic core (1, 2), and the magnetic conductive layer (5) fills the space between the magnetic core (1, 2) and the protective shell (4). The movable adjustment mechanism includes a base (8), a telescopic pole (7), and a rotating arm (9). The base (8) is used to fix the device to the surface of the equipment, and the telescopic pole (7) and the rotating arm (9) are used to adjust the position of the magnetic rod module (3) in three-dimensional space. The impurity collection area (6) is located below the magnetic rod module (3) and is a detachable transparent structure used to collect adsorbed magnetic impurities. The magnetic rod module (3) is connected to the movable adjustment mechanism through a quick-release interface to achieve quick assembly and disassembly.

2. The portable magnetic rod device according to claim 1, characterized in that, The magnetic core is a square magnetic core (2) or a circular magnetic core (1), with rounded edges and a radius of R1 to R3 mm.

3. The portable magnetic rod device according to claim 2, characterized in that, The magnetic cores (1, 2) are made of neodymium iron boron N52 grade or sintered samarium cobalt permanent magnets with a surface magnetic field strength ≥10000Gs.

4. The portable magnetic rod device according to claim 1, characterized in that, The magnetic conductive layer (5) is a nanocrystalline alloy or silicon steel sheet with a thickness of 0.3 to 1.0 mm.

5. The portable magnetic rod device according to claim 1, characterized in that, The base (8) of the movable adjustment mechanism has a built-in strong magnet group or vacuum suction cup with an adsorption force ≥50N.

6. The portable magnetic rod device according to claim 1, characterized in that, The telescopic pole (7) has an adjustment range of 10 to 150 mm or 300 to 1200 mm, and the rotating arm (9) supports 360° rotation.

7. The portable magnetic rod device according to claim 1, characterized in that, The moving adjustment mechanism also includes a slider guide rail (12) for adjusting the position of the magnetic rod module (3) in the horizontal direction.

8. The portable magnetic rod device according to claim 1, characterized in that, The quick-release interface is a magnetic snap or a rotary snap.

9. The portable magnetic rod device according to claim 8, characterized in that, The quick-release interface supports the independent disassembly of a single magnetic rod module (3), with a replacement time of ≤30 seconds.

10. The portable magnetic rod device according to claim 1, characterized in that, The impurity collection area (6) is located 5 mm directly below the magnetic rod module (3).

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