Special magnetic bar suitable for demagnetizing battery pole piece, foil and diaphragm

Abstract

The utility model relates to the technical field of demagnetization, in particular to a special magnetic bar suitable for demagnetization of battery pole pieces, foils and diaphragms, which comprises a U-shaped shielding framework, permanent magnets and magnetizers, a plurality of permanent magnets are arranged on the U-shaped shielding framework side by side, two adjacent permanent magnets are mounted along the length direction of the magnetic bar in a homopolar repulsion manner, and the magnetizers are arranged on the U-shaped shielding framework side by side. And a magnetizer is arranged between the two same magnetic poles. Compared with a traditional magnetic bar, the magnetic bar has the advantages that magnetic lines are consistent with the length of the magnetic bar, continuity is uninterrupted, the magnetic field stability and consistency are high, and the magnetic bar is suitable for demagnetizing materials such as strip-shaped pole pieces, foils and diaphragms.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of demagnetization, specifically relates to a special magnetic bar for removing magnetism of battery pole piece, foil and diaphragm. BACKGROUND

[0002] In the production process of lithium ion battery, the coating of battery pole piece is easy to be polluted by metal scraps and dust caused by equipment abrasion during drying, roller, slitting and punching, and the magnetic metal material is directly circulated to form a battery cell, which finally causes the risk of spontaneous combustion of the battery cell product. Therefore, removing the magnetic impurities on the surface of the positive and negative pole pieces is a very key step, which plays a crucial role in the self-discharge of lithium ion batteries. In the prior art, a magnetic field is generated by a magnetic bar to adsorb and treat the magnetic metal impurities on the surface of the pole piece, which is referred to as pole piece demagnetization. In the existing magnetic bar structure, the arrangement of the magnets is different, resulting in uneven demagnetization effect and unsatisfactory cleaning effect of the belt-shaped material such as battery pole piece.

[0003] Therefore, the skilled in the art needs to solve the problem of uneven demagnetization effect of the existing magnetic bar for pole piece demagnetization. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a special magnetic bar for removing magnetism of battery pole piece, foil and diaphragm.

[0005] The purpose of the utility model can be achieved by the following technical solutions: a special magnetic bar for removing magnetism of battery pole piece, foil and diaphragm, comprising a U-shaped shielding framework, permanent magnets and magnetic conductors, a plurality of permanent magnets are arranged side by side on the U-shaped shielding framework, two adjacent permanent magnets are installed with repulsion of the same poles along the length direction of the magnetic bar, and a magnetic conductor is arranged between two same magnetic poles.

[0006] As a preferred scheme of the utility model, the permanent magnets, the magnetic conductors and the U-shaped shielding framework are bonded by adhesive material.

[0007] As a preferred scheme of the utility model, the height of the magnetic conductor is greater than the height of the permanent magnet.

[0008] As a preferred scheme of the utility model, the magnetic conductor is 0.2mm higher than the permanent magnet.

[0009] As a preferred scheme of the utility model, the thickness of the magnetic conductor is 1.5-3mm.

[0010] As a preferred scheme of the utility model, it further comprises a stainless steel shell.

[0011] As the preferred scheme of the utility model, the U-shaped shielding framework, permanent magnet and magnetic conductor are fixed by glue seamless bonding between the stainless steel shell.

[0012] As the preferred scheme of the utility model, the outer surface of the stainless steel shell is processed by polishing.

[0013] The utility model discloses a kind of special magnetic rod for battery pole piece, foil, diaphragm demagnetization, adopt U-shaped shielding framework function in effectively shielding the magnetic field of remaining three sides, let magnetic force more concentrate in one working surface, while enhance the rigidity of magnetic rod, not easy to bend deformation when using;The utility model has the advantages that relative traditional magnetic rod: magnetic force line is consistent with the length of magnetic rod square continuity uninterrupted, stainless steel shell and internal structure seamless bonding, magnetic field stability consistency is high, it is suitable for strip pole piece, foil, diaphragm and other material demagnetization, magnetic rod is placed above or below the material to be demagnetized, magnetic force line direction is perpendicular to the direction of material to be demagnetized, realize no magnetic blind area covering material, to greatly improve demagnetization efficiency, to ensure the cleanliness of strip material such as pole piece, foil, diaphragm. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model is further described with the drawings, but the embodiment in the drawings does not constitute any limitation to the utility model, and other drawings can be obtained according to the following drawings without creative labor for ordinary skilled in the art.

[0015] Figure 1 It is the structure schematic view of the utility model for special magnetic rod for battery pole piece, foil, diaphragm demagnetization.

[0016] Figure 2 It is another structure schematic view of the utility model for special magnetic rod for battery pole piece, foil, diaphragm demagnetization.

[0017] Figure 3 It is Figure 2 The structure schematic view of magnetic rod end surface.

[0018] The reference numeral shown in the drawing is: 1, U-shaped shielding framework;2, permanent magnet;3, stainless steel shell;4, magnetic conductor;5, glue material. DETAILED DESCRIPTION

[0019] It should be noted that if the embodiment of the utility model involves directional indication (such as up, down, left, right, front, back …), the directional indication is only used to explain the relative position relationship, movement condition etc. between components in a certain specific posture (such as shown in the drawing), if the specific posture changes, the directional indication also changes accordingly.

[0020] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that the technical solutions can be realized by the ordinary skilled in the art, and when the combination of the technical solutions appears contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope required by the present application.

[0021] The technical solutions of the present application will be described clearly and completely in combination with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the present application.

[0022] Referring to Figures 1 to 3 As shown in the figure, the structure of the present application is: a special magnetic rod for removing magnetism of battery pole piece, foil and diaphragm, comprising U-shaped shielding framework 1, permanent magnet 2 and magnetic conductor 4, a plurality of permanent magnets 2 are arranged side by side on the U-shaped shielding framework 1, two adjacent permanent magnets 2 are installed with the same pole repelling along the length direction of the magnetic rod, and the magnetic conductor 4 is arranged between two same magnetic poles.

[0023] The special magnetic rod for removing magnetism provided in the embodiment, as Figure 2 As shown in the figure, the permanent magnet 2, the magnetic conductor 4 and the U-shaped shielding framework 1 are bonded by adhesive material 5.

[0024] The special magnetic rod for removing magnetism provided in the embodiment, as Figure 2 As shown in the figure, the height of the magnetic conductor 4 is greater than the height of the permanent magnet 2.

[0025] The special magnetic rod for removing magnetism provided in the embodiment, the magnetic conductor 4 is higher than the permanent magnet 0.2mm.

[0026] The special magnetic rod for removing magnetism provided in the embodiment, the thickness of the magnetic conductor 4 is 1.5~3mm.

[0027] The special magnetic rod for removing magnetism provided in the embodiment, as Figure 1 As shown in the figure, it also includes a stainless steel shell 3.

[0028] The special magnetic rod for removing magnetism provided in the embodiment, the U-shaped shielding framework 1, the permanent magnet 2 and the magnetic conductor 4 are all bonded and fixed with the stainless steel shell 3 by glue.

[0029] The outer surface of the stainless steel shell 3 is polished.

[0030] In use, the magnetic rod is used for removing magnetism of battery pole piece, foil and diaphragm, and comprises a U-shaped shielding framework 1, permanent magnets 2, a stainless steel shell 3 and a magnetic conductor 4. The magnetic field strength of the magnetic force gathering point is adjusted by adjusting the width of the permanent magnet 2, and the effective magnetic line quantity is formed by relying on the magnetic circuit.

[0031] The above is further described by the specific embodiments, but it should be understood that the specific description should not be understood as limiting the essence and scope of the utility model, and various modifications made by the ordinary skilled in the art after reading the description of the above embodiments belong to the scope protected by the utility model.

Claims

1. A magnetic bar for removing magnetic field from battery pole piece, foil and diaphragm, characterized in that: It comprises a U-shaped shielding framework (1), permanent magnets (2) and magnetic conductors (4), multiple permanent magnets (2) are arranged side by side on the U-shaped shielding framework (1), two adjacent permanent magnets (2) are installed with repulsion along the length direction of the magnetic rod, and a magnetic conductor (4) is arranged between two same magnetic poles. ​ 2. The magnetic rod for removing magnetic field from battery pole piece, foil and diaphragm according to claim 1, characterized in that: The permanent magnets (2), the magnetic conductors (4) and the U-shaped shielding framework (1) are bonded by adhesive material (5).

3. The magnetic rod for removing magnetic field from battery pole piece, foil and diaphragm according to claim 1, characterized in that: The height of the magnetic conductor (4) is greater than the height of the permanent magnet (2).

4. The magnetic rod for removing magnetic field from battery pole piece, foil and diaphragm according to claim 3, characterized in that: The magnetic conductor (4) is 0.2mm higher than the permanent magnet (2).

5. The magnetic bar for removing magnetic field from battery pole piece, foil and diaphragm according to claim 1, characterized in that: The thickness of the magnetic conductor (4) is 1.5-3mm.

6. The magnetic bar for removing magnetic field from battery pole piece, foil and diaphragm according to claim 1, characterized in that: It also comprises a stainless steel shell (3).

7. The magnetic bar for removing magnetic field from battery pole piece, foil and diaphragm according to claim 6, characterized in that: The U-shaped shielding framework (1), the permanent magnets (2) and the magnetic conductors (4) are seamlessly bonded and fixed with the stainless steel shell (3) by glue.

8. The magnetic rod for removing magnetic field from battery pole piece, foil and diaphragm according to claim 6, characterized in that: The outer surface of the stainless steel shell (3) is polished.

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