Magnetic foreign matter removing device and coating device

Abstract

The utility model discloses a magnetic foreign matter removing device and a coating device.The magnetic foreign matter removing device comprises a first pipeline, a second pipeline and a magnetic part, the second pipeline is arranged outside the first pipeline in a sleeving mode, a gap exists between the second pipeline and the first pipeline in the radial direction, and the magnetic part is arranged in the first pipeline. According to the scheme provided by the invention, as the magnetic part is arranged in the first pipeline, at the moment, the pipe wall of the first pipeline has certain magnetism, and when slurry passes through the gap between the first pipeline and the second pipeline, metal magnetic particles in the slurry can be quickly adsorbed to the outer side wall of the first pipeline; the whole process is simple and convenient, the metal magnetic particles in the slurry can be well removed, and the removal efficiency is high.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly relates to a device for removing magnetic foreign objects and a coating device. Background Art

[0002] Magnetic impurities in lithium battery slurry have a significant impact on the performance of battery cells. Therefore, before coating the lithium battery slurry, it is necessary to strictly and efficiently remove the magnetic impurities in the slurry through a device for removing magnetic foreign objects.

[0003] When the device for removing magnetic foreign objects in the related art is in use, the removal efficiency is low and it is not convenient to clean. Summary of the Utility Model

[0004] In view of the above problems, the present application provides a device for removing magnetic foreign objects and a coating device, which can solve the problem of low removal efficiency when the device for removing magnetic foreign objects is in use.

[0005] To solve the above technical problems, in a first aspect, the present application provides a device for removing magnetic foreign objects, including:

[0006] A first pipeline;

[0007] A second pipeline, the second pipeline is sleeved outside the first pipeline, and there is a radial gap between the second pipeline and the first pipeline;

[0008] A magnetic member, the magnetic member is arranged radially in the first pipeline and abuts against the inner wall of the first pipeline. In the technical solution of the embodiment of the present application, since the magnetic member is arranged in the first pipeline, at this time, the pipe wall of the first pipeline has a certain magnetism. When the slurry passes through the gap between the first pipeline and the second pipeline, the metal magnetic particles in the slurry will be quickly adsorbed onto the outer side wall of the first pipeline, thereby completing the removal of the metal magnetic particles in the slurry. The overall process is simple and convenient, and can well remove the metal magnetic particles in the slurry with high removal efficiency. Moreover, since the magnetic member is located in the first pipeline, during the process of removing the metal magnetic particles from the slurry, the magnetic member does not need to contact the slurry, thereby avoiding cleaning the magnetic member. At the same time, since the magnetic member directly abuts against the inner wall of the first pipeline, the magnetic force on the magnetic member can be directly transmitted to the side wall of the first pipeline.

[0009] In some embodiments, the device for removing magnetic foreign objects further includes a positive power supply and a negative power supply;

[0010] Both the first pipeline and the second pipeline can conduct electricity. The positive power supply is electrically connected to the first pipeline, and the negative power supply is electrically connected to the second pipeline; or,

[0011] The positive power supply is electrically connected to the second pipe, and the negative power supply is electrically connected to the first pipe. In this way, the metal magnetic particles adsorbed on the outer side wall of the first pipe can be oxidized through electrochemical corrosion to achieve the ionization of the metal magnetic particles.

[0012] In some embodiments, the first pipe is a metal pipe. In this way, the hardness of the first pipe can be improved. When the magnetic part is fixed inside the first pipe, scratching of the inner wall of the first pipe by the magnetic part can be avoided when the hardness of the first pipe is increased.

[0013] In some embodiments, the wall thickness of the second pipe is greater than or equal to 3 mm. In this way, the overall strength of the second pipe can be improved. When the slurry flows between the first pipe and the second pipe, the slurry generates pressure on the second pipe. Deformation of the second pipe can be avoided when the overall strength of the second pipe is increased.

[0014] In some embodiments, the radial gap between the second pipe and the first pipe is 5 mm - 20 mm. In this way, by defining the gap between the first pipe and the second pipe, excessive pressure on the inner wall of the second pipe by the slurry when the gap is too small can be avoided.

[0015] In some embodiments, the magnetic foreign object removing device includes a plurality of magnetic parts, and the plurality of magnetic parts are uniformly arranged inside the first pipe. In this way, the magnetism on the first pipe can be increased, thereby facilitating the adsorption of metal magnetic particles in the slurry.

[0016] In some embodiments, the axial distance between two adjacent magnetic parts is 5 mm - 8 mm.

[0017] In some embodiments, the lengths of both the first pipe and the second pipe are between 1000 mm and 1500 mm. In this way, the slurry can flow sufficiently between the first pipe and the second pipe, so as to adsorb the metal magnetic particles in the slurry onto the first pipe and improve the purity of the slurry.

[0018] In a second aspect, the present application provides a coating device, including the magnetic foreign object removing device according to any one of the embodiments of the present application.

[0019] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically describes the embodiments of the present application. Description of the Drawings

[0020] By reading the following detailed description of the embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the embodiments and are not considered to be a limitation of the present application. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0021] Figure 1 Schematic structural diagram of a magnetic foreign object removal device provided for some embodiments of the present application.

[0022] The reference numerals in the specific embodiments are as follows:

[0023] 10. First pipeline; 11. Second pipeline; 12. Magnetic part; 13. Positive power supply; 14. Negative power supply; 15. Metal magnetic particles. Specific embodiments

[0024] Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0026] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality" means two or more unless otherwise specifically defined.

[0027] Referring to "embodiment" herein means that a specific feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0028] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0029] In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0030] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present application.

[0031] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0032] Magnetic impurities in lithium battery slurry have a significant impact on the performance of the battery cell. Therefore, before coating the lithium battery slurry, it is necessary to strictly and efficiently remove the magnetic impurities in the slurry through a magnetic foreign object removal device.

[0033] When the magnetic foreign object removal device in the related art is in use, it is necessary to frequently clean the magnetic rod in the magnetic foreign object removal device to ensure the magnetism of the magnetic rod. This inevitably affects the work efficiency and reduces the demagnetization effect of the slurry.

[0034] Based on the above considerations, in order to solve the problem of low removal efficiency when using the magnetic foreign object removal device, a magnetic foreign object removal device is designed. The magnetic foreign object removal device includes a first pipe, a second pipe, and a magnetic member. Among them, the second pipe is sleeved outside the first pipe, and there is a radial gap between the second pipe and the first pipe. The magnetic member is arranged radially in the first pipe and abuts against the inner wall of the first pipe.

[0035] In the technical solution of the embodiment of the present application, since the magnetic member is arranged in the first pipe, at this time, the pipe wall of the first pipe has a certain magnetism. When the slurry passes through the gap between the first pipe and the second pipe, the metal magnetic particles in the slurry will be quickly adsorbed onto the outer side wall of the first pipe, thereby completing the removal of the metal magnetic particles in the slurry. The overall process is simple and convenient, and can well remove the metal magnetic particles in the slurry with high removal efficiency. Moreover, since the magnetic member is located in the first pipe, during the process of removing the metal magnetic particles from the slurry, the magnetic member does not need to contact the slurry, thus avoiding the cleaning of the magnetic member. At the same time, since the magnetic member directly abuts against the inner wall of the first pipe, the magnetic force on the magnetic member can be directly transmitted to the side wall of the first pipe.

[0036] According to some embodiments of the present application, Figure 1 is a schematic structural diagram of the magnetic foreign object removal device in the present application. As Figure 1 shown, the present application provides a magnetic foreign object removal device, which includes a first pipe 10, a second pipe 11, and a magnetic member 12. Among them, the second pipe 11 is sleeved outside the first pipe 10, and there is a radial gap between the second pipe 11 and the first pipe 10. The magnetic member 12 is arranged radially in the first pipe 10 and abuts against the inner wall of the first pipe 10.

[0037] The materials of the first pipe 10 and the second pipe 11 in this embodiment can both be carbon-based materials such as graphite, or conductive oxide materials such as lead dioxide, or metal and alloy materials with good conductivity. Specifically, it can be determined according to the actual situation, and the embodiments of this specification do not limit this.

[0038] In this embodiment, the first pipe 10 can be fixed in the second pipe 11 through a support rod. The diameter of the second pipe 11 is larger than that of the first pipe 10. The first pipe 10 and the second pipe 11 form an annular structure. The first pipe 10 and the second pipe 11 can be concentrically arranged or in an eccentric structure. Specifically, it can be determined according to the actual situation, and the embodiments of this specification do not limit this.

[0039] The magnetic member 12 in this embodiment can be a cylindrical magnetic rod, a cubic magnetic rod, etc. Specifically, it can be determined according to the actual situation, and the embodiments of this specification do not limit this.

[0040] In this embodiment, the magnetic member 12 can be snap-fitted inside the first pipe 10, or the magnetic member 12 is fixed inside the first pipe 10 by a buckle, and specifically, it can be determined according to the actual situation, and the embodiments of this specification do not limit this.

[0041] The magnetic member 12 in this embodiment can be a cylindrical magnetic rod, a cubic magnetic rod, etc., and specifically, it can be determined according to the actual situation, and the embodiments of this specification do not limit this.

[0042] In this embodiment, the magnetic member 12 can be snap-fitted inside the first pipe 10, or the magnetic member 12 is fixed inside the first pipe 10 by a buckle, and specifically, it can be determined according to the actual situation, and the embodiments of this specification do not limit this.

[0043] During use, since the magnetic member 12 is arranged inside the first pipe 10, at this time, the pipe wall of the first pipe 10 has a certain magnetism. When the slurry passes through the gap between the first pipe 10 and the second pipe 11, the metal magnetic particles 15 in the slurry will be quickly adsorbed onto the outer side wall of the first pipe 10, thereby completing the removal of the metal magnetic particles 15 in the slurry. The overall process is simple and convenient, and can well remove the metal magnetic particles 15 in the slurry without cleaning the magnetic member 12. The overall device can work continuously for a long time, effectively improving the removal efficiency. Moreover, since the magnetic member 12 is located inside the first pipe 10, during the process of the slurry removing the metal magnetic particles 15, the magnetic member 12 does not need to contact the slurry, thereby avoiding cleaning the magnetic member 12. At the same time, since the magnetic member 12 is directly in contact with the inner wall of the first pipe 10, the magnetic force on the magnetic member 12 can be directly transmitted to the side wall of the first pipe 10, thereby improving the ability of the first pipe 10 to adsorb the metal magnetic particles 15.

[0044] According to some embodiments of the present application, as Figure 1 shown, the device for removing magnetic foreign objects further includes a positive power supply 13 and a negative power supply 14; wherein, both the first pipe 10 and the second pipe 11 can conduct electricity, the positive power supply 13 is electrically connected to the first pipe 10, and the negative power supply 14 is electrically connected to the second pipe 11; or, the positive power supply 13 is electrically connected to the second pipe 11, and the negative power supply 14 is electrically connected to the first pipe 10.

[0045] In this embodiment, the positive power supply 13 or the negative power supply 14 can be connected to the first pipe 10, and the negative power supply 14 or the positive power supply 13 can be connected to the second pipe 11. For the convenience of description below, it is taken as an example that the positive power supply 13 is connected to the first pipe 10 and the negative power supply 14 is connected to the second pipe 11 for description.

[0046] Refer to Figure 1As shown, since the metal magnetic particles 15 are adsorbed on the outer wall of the first pipe 10, there is a potential difference between the positive power supply 13 on the first pipe 10 and the negative power supply 14 on the second pipe 11. Electrons will flow from the anode to the cathode, forming an electric current. In this process, the metal magnetic particles 15 are continuously oxidized and dissolved at the anode, while a corresponding reduction reaction occurs at the cathode, thus achieving the ionization of the metal magnetic particles 15.

[0047] The metal magnetic particles 15 in this embodiment include, but are not limited to, magnetic metal particles such as iron and stainless steel.

[0048] During use, a positive power supply 13 is electrically connected to the first pipe 10, and a negative power supply 14 is electrically connected to the second pipe 11. In this way, the small particles in the metal magnetic particles 15 adsorbed on the outer wall of the first pipe 10 will be electrolytically ionized, or the large particles are electrolyzed into small particles, and the small particles are further electrolyzed completely and ionized.

[0049] During the demagnetization electrolysis process, by applying an external constant voltage greater than 3.5V or connecting a constant current greater than 1mA to the first pipe 10 and the second pipe 11, and the power-on methods include, but are not limited to, connecting a pulsed voltage or a pulsed current and other solutions, the purpose of electrolyzing the metal magnetic particles 15 in the slurry can be achieved.

[0050] According to some embodiments of the present application, the first pipe 10 is a metal pipe. In this way, the hardness of the first pipe 10 can be improved. When the magnetic part 12 is fixed inside the first pipe 10, scratching of the inner wall of the first pipe 10 by the magnetic part 12 can be avoided when the hardness of the first pipe 10 is improved.

[0051] According to some embodiments of the present application, the wall thickness of the second pipe 11 is greater than or equal to 3mm.

[0052] The wall thickness of the second pipe 11 in this embodiment can be 3.5mm, 4mm, etc., and can be specifically determined according to actual situations, and this specification embodiment does not limit this.

[0053] In this embodiment, by limiting the wall thickness of the second pipe 11, the overall strength of the second pipe 11 can be improved. When the slurry flows between the first pipe 10 and the second pipe 11, the slurry generates pressure on the second pipe 11. When the overall strength of the second pipe 11 is improved, deformation of the second pipe 11 can be avoided.

[0054] According to some embodiments of the present application, the radial gap between the second pipe 11 and the first pipe 10 is 5mm - 20mm.

[0055] In this embodiment, the radial gap between the second pipe 11 and the first pipe 10 can be 7 mm, 10 mm, etc., which can be determined according to the actual situation specifically, and the embodiments of this specification do not limit this.

[0056] In this embodiment, by limiting the radial gap between the second pipe 11 and the first pipe 10, it is possible to avoid excessive pressure of the slurry on the inner wall of the second pipe 11 when the gap is too small.

[0057] According to some embodiments of the present application, the magnetic foreign object removing device includes a plurality of magnetic members 12, and the plurality of magnetic members 12 are uniformly arranged in the first pipe 10.

[0058] The number of magnetic members 12 in this embodiment can be 15, 18, etc., which can be determined according to the actual situation specifically, and the embodiments of this specification do not limit this.

[0059] In this embodiment, by arranging a plurality of magnetic members 12 in the first pipe 10, the magnetism of the first pipe 10 can be improved, so as to facilitate the adsorption of metal magnetic particles 15 in the slurry.

[0060] According to some embodiments of the present application, the axial distance between two adjacent magnetic members 12 is 5 mm - 8 mm.

[0061] In this embodiment, the axial distance between two adjacent magnetic members 12 can be 5 mm, 6 mm, etc., which can be determined according to the actual situation specifically, and the embodiments of this specification do not limit this.

[0062] In this embodiment, by limiting the axial distance between two adjacent magnetic members 12, it is possible to avoid too large a gap between two adjacent magnetic members 12, resulting in a decrease in the magnetic force on the side wall of the first pipe 10 and affecting the adsorption of metal magnetic particles 15.

[0063] According to some embodiments of the present application, the lengths of both the first pipe 10 and the second pipe 11 are between 1000 mm and 1500 mm.

[0064] In this embodiment, the lengths of both the first pipe 10 and the second pipe 11 can be 1100 mm, 1200 mm, etc., which can be determined according to the actual situation specifically, and the embodiments of this specification do not limit this.

[0065] In this embodiment, by limiting the lengths of the first pipe 10 and the second pipe 11, the slurry can flow sufficiently between the first pipe 10 and the second pipe 11, so as to adsorb the metal magnetic particles 15 in the slurry onto the first pipe 10 and improve the purity of the slurry.

[0066] The present application also provides a coating device, including the magnetic foreign object removing device according to any one of the embodiments of the present application.

[0067] The specific structure of the magnetic foreign object removing device in this embodiment refers to the above-mentioned embodiment. Since all the technical solutions of the above-mentioned embodiments are adopted in this magnetic foreign object removing device, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated here one by one.

[0068] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A device for removing magnetic foreign objects, characterized in that, Comprising: A first pipeline; A second pipeline, the second pipeline is sleeved outside the first pipeline, and there is a radial gap between the second pipeline and the first pipeline; A magnetic member, the magnetic member is arranged radially in the first pipeline, and the magnetic member abuts against the inner wall of the first pipeline.

2. The magnetic foreign object removing device according to claim 1, wherein The magnetic foreign object removing device further includes a positive power supply and a negative power supply; Both the first pipeline and the second pipeline can conduct electricity, the positive power supply is electrically connected to the first pipeline, and the negative power supply is electrically connected to the second pipeline; or, The positive power supply is electrically connected to the second pipeline, and the negative power supply is electrically connected to the first pipeline.

3. The magnetic foreign object removal device according to claim 2, wherein The first pipeline is a metal pipe.

4. The foreign magnetic object removing device according to any one of claims 1 to 3, characterized in that, The wall thickness of the second pipeline is greater than or equal to 3 mm.

5. The foreign object removal device for magnetic foreign objects according to any one of claims 1 to 3, characterized in that, The radial gap between the second pipeline and the first pipeline is 5 mm - 20 mm.

6. The magnetic foreign object removal device according to claim 1, wherein The magnetic foreign object removing device includes a plurality of magnetic members, and the plurality of magnetic members are evenly arranged in the first pipeline.

7. The magnetic foreign object removal device according to claim 6, characterized in that, The axial distance between two adjacent magnetic members is 5 mm - 8 mm.

8. The foreign magnetic substance removing device according to any one of claims 1 to 3, characterized in that, The lengths of both the first pipeline and the second pipeline are between 1000 mm and 1500 mm.

9. A coating device, characterized in that, Comprising the magnetic foreign object removing device according to any one of claims 1 to 8.

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