Electrode powder demagnetizing device

Abstract

The utility model relates to an electrode powder demagnetizing device. The electrode powder demagnetizing device comprises a main body, a demagnetizing cavity is formed in the main body, and the demagnetizing cavity penetrates through the main body in the first direction; and the demagnetizing mechanism comprises a plurality of magnetic parts, and the plurality of magnetic parts are rotatably arranged in the demagnetizing cavity. The magnetic field generated by the magnetic part can adsorb magnetic substances in the electrode powder, and when the magnetic part rotates, the magnetic part can integrally and uniformly adsorb magnetic impurities, and the electrode powder falling onto the magnetic part can fall off.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an electrode powder demagnetization device. Background Art

[0002] Electrode materials are one of the materials used to manufacture the positive or negative electrodes of lithium-ion batteries. Manufacturing these materials requires mixing various raw materials with certain particle size requirements. These materials must be mixed, crushed, stirred, and screened in a stirred tank. During these processes, some ferrous magnetic substances can be introduced, and the raw materials themselves may also contain some magnetic substances. These magnetic substances have a serious negative impact on the electrochemical properties of the materials, necessitating demagnetization of the materials.

[0003] In traditional demagnetization devices, magnet attraction is generally used for demagnetization. In order to improve the demagnetization effect, as much magnetic material as possible is removed, the number of magnets is increased, or a dense grid of magnets is used for demagnetization.

[0004] However, during the demagnetization process, powder generally falls from top to bottom onto the dense grid-shaped magnet, which can easily cause the powder to accumulate on the upper part of the magnet during demagnetization, resulting in powder loss. Utility Model Content

[0005] Based on this, it is necessary to provide an electrode powder demagnetization device to address the problem that powder in traditional technology easily falls onto the demagnetization device and causes loss.

[0006] An electrode powder demagnetization device, comprising:

[0007] A main body, wherein a demagnetization cavity is provided inside the main body, and the demagnetization cavity penetrates the main body along a first direction; and

[0008] The demagnetization mechanism comprises a plurality of magnetic parts, and the plurality of magnetic parts are rotatably arranged in the demagnetization cavity.

[0009] In one embodiment, the demagnetization mechanism includes a first magnetic component group and a second magnetic component group, each of which includes multiple magnetic components. The projections of the magnetic components of the first magnetic component group along a first direction intersect with the projections of the magnetic components of the second magnetic component group along the first direction. This arrangement reduces the distance between the multiple magnetic components, thereby increasing the range of the magnetic core of the powder and improving the demagnetization effect.

[0010] In one embodiment, the demagnetization chamber includes a first sub-demagnetization chamber and a second sub-demagnetization chamber, the first magnetic component group is disposed in the first sub-demagnetization chamber, and the second magnetic component group is disposed in the second sub-demagnetization chamber. This arrangement enables the first magnetic component group and the second magnetic component group to be adjusted separately through the first sub-demagnetization chamber and the second sub-demagnetization chamber.

[0011] In one embodiment, the first and second sub-cavities are rotatably connected. This arrangement allows the rotation of the first and second sub-cavities to change the angle between the horizontal projections of the magnetic elements in the first and second sub-cavities, thereby changing the contact area between the magnetic elements and the electrode powder, thereby maximizing the magnetic attraction of the magnetic material.

[0012] In one embodiment, the multiple magnetic members of the first magnetic member group and / or the second magnetic member group are arranged in two rows along the first direction, and the spacing between the two rows of magnetic members gradually increases or decreases along the first direction. This arrangement increases the contact area between the electrode powder and the magnetic members, allowing the magnetic members to more fully attract magnetic particles, resulting in a more thorough demagnetization effect and improving the purity of the electrode powder.

[0013] In one embodiment, the plurality of magnetic members in the first magnetic member group and / or the second magnetic member group are arranged in two rows along the first direction, with the lines connecting the magnetic members in each row parallel to the first direction. This arrangement allows the electrode powder to flow in the first direction only onto the magnetic member at the front end, preventing excessive electrode powder from landing on the magnetic member and causing electrode powder loss.

[0014] In one embodiment, the demagnetization mechanism further includes a driving member configured to rotate the magnetic member. This configuration allows the driving member to rotate the magnetic member during the demagnetization process, allowing electrode powder that has fallen onto the magnetic member to slide off the magnetic member.

[0015] In one embodiment, the side of the main body is provided with a plurality of openings, and the magnetic member is passed through the openings and is rotatably connected to the main body via a bearing. This arrangement facilitates the rotation of the magnetic member in the openings.

[0016] In one embodiment, the extension direction of the magnetic member is perpendicular to the first direction. This configuration allows the powder to collide with the magnetic member when falling, thereby improving the magnetic attraction effect on magnetic impurities.

[0017] In one embodiment, the electrode powder demagnetization device further includes a feed member and a discharge member. The feed member is disposed at the feed port of the demagnetization chamber, and the discharge member is disposed at the discharge port of the demagnetization chamber. The feed member and / or the discharge member are trumpet-shaped. The feed member causes the powder to gradually shrink as it enters the demagnetization chamber, thereby reducing the possibility of powder scattering. The discharge member allows the demagnetized powder to be discharged without obstruction.

[0018] In the above-mentioned electrode powder demagnetization device, the electrode powder to be demagnetized enters the demagnetization chamber from one side of the main body and flows in a first direction. The magnetic field generated by the magnetic part can adsorb the magnetic material in the electrode powder. In addition, when the magnetic part rotates, the electrode powder that falls on the magnetic part can fall off due to the self-rotation of the magnetic part, effectively solving the problem of electrode powder waste caused by electrode powder falling on the magnetic part. At the same time, since the electrode powder falls from top to bottom, magnetic impurities are generally adsorbed on the upper and side parts of the magnetic part. Through rotation, the magnetic impurities can be uniformly adsorbed on the entire magnetic part. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A perspective view of an electrode powder demagnetization device in one embodiment;

[0020] Figure 2 A side view of an electrode powder demagnetization device in one embodiment;

[0021] Figure 3 A top view of an electrode powder demagnetization device in one embodiment;

[0022] Figure 4A A schematic diagram of an embodiment in which the distance between two rows of magnetic members of a first magnetic member group gradually increases along a first direction;

[0023] Figure 4B A schematic diagram of an embodiment in which the distance between two rows of magnetic members of a first magnetic member group gradually decreases along a first direction;

[0024] Figure 4C A schematic diagram of an embodiment in which the distance between two rows of magnetic members of the second magnetic member group gradually decreases along the first direction;

[0025] Figure 4D FIG. 1 is a schematic diagram showing that the distance between two rows of magnetic members in the second magnetic member group gradually increases along the first direction in one embodiment.

[0026] Explanation of the accompanying reference numerals: 10. Main body; 11. Demagnetization chamber; 12. Feeding member; 13. Discharging member; 14. First body; 15. Second body; 20. Demagnetization mechanism; 21. Magnetic member; 22. First magnetic member group; 23. Second magnetic member group. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0030] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0031] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0033] The positive and negative electrode materials of a battery are typically composed of a variety of chemical substances, some of which may contain magnetic impurities such as iron and nickel. These magnetic impurities can affect the electrochemical performance of the electrode materials, such as reducing the battery's capacity and increasing its internal resistance. Demagnetization treatment can reduce the content of magnetic impurities in the electrode materials, increase their purity, and thus improve battery performance and stability.

[0034] See Figure 1 , Figure 1 A stereoscopic view of an electrode powder demagnetization device in one embodiment of the present application is shown. An embodiment of the present application provides an electrode powder demagnetization device, which includes a main body 10 and a demagnetization mechanism 20. A demagnetization chamber 11 is provided in the main body 10, and the demagnetization chamber 11 serves as a demagnetization space for the electrode powder. The demagnetization mechanism 20 is provided on the main body 10, and is at least partially located in the demagnetization chamber 11, and is capable of adsorbing the magnetic material in the demagnetization chamber 11. The electrode powder that needs to be demagnetized enters the demagnetization chamber 11 from one end of the main body 10, and after being demagnetized by the demagnetization mechanism 20 inside the demagnetization chamber 11, it passes through the demagnetization chamber 11 and is output from the other end of the main body 10. The magnetic impurities in the output electrode powder are adsorbed and removed by the demagnetization mechanism 20, thereby improving the purity of the electrode powder.

[0035] The demagnetization cavity 11 extends through the main body 10 along a first direction, which is the direction of powder flow. Thus, the electrode powder passes through the demagnetization cavity 11 when flowing along the first direction. Alternatively, the first direction may be a vertically downward direction, allowing the electrode powder to freely fall under the action of gravity. Alternatively, when the electrode powder demagnetization device is placed on a horizontal surface, the first direction is perpendicular to the horizontal surface.

[0036] The demagnetization mechanism 20 includes a plurality of magnetic members 21, which are rotatably disposed in the demagnetization chamber 11. When the powder flows in the demagnetization chamber 11, the magnetic field generates an attractive force on the magnetic impurities, thereby adsorbing the magnetic impurities.

[0037] In the above-mentioned electrode powder demagnetization device, the electrode powder to be demagnetized enters the demagnetization chamber 11 from one side of the main body 10 and flows along the first direction. The magnetic field generated by the magnetic part 21 can adsorb the magnetic substance in the electrode powder. And when the magnetic part 21 rotates, the electrode powder that falls on the magnetic part 21 can fall off due to the rotation of the magnetic part 21, which effectively solves the problem of electrode powder waste caused by the electrode powder falling on the magnetic part 21; at the same time, since the electrode powder falls from top to bottom, the magnetic impurities are generally adsorbed on the upper and side parts of the magnetic part 21, and the magnetic impurities can be uniformly adsorbed on the entire magnetic part 21 through rotation.

[0038] In some embodiments, the electrode powder demagnetization device further includes a feed member 12 and a discharge member 13. The feed member 12 is disposed at the feed port of the demagnetization chamber 11, and the discharge member 13 is disposed at the discharge port of the demagnetization chamber 11. The powder to be demagnetized enters the demagnetization chamber 11 from the feed member 12 and is discharged from the discharge member 13 after demagnetization. The feed member 12 can be trumpet-shaped, and the discharge member 13 can also be trumpet-shaped. The trumpet shape means that the opening area on one side is smaller than the opening area on the other side.

[0039] The feed member 12 has a smaller opening area connected to the main body 10, while the larger opening area is away from the main body 10. This arrangement allows the powder to gradually shrink as it enters the trumpet-shaped container, thereby reducing the possibility of powder scattering. The discharge member 13 has a smaller opening area connected to the main body 10, while the larger opening area is away from the main body 10, allowing the demagnetized powder to be discharged without obstruction.

[0040] Optionally, the magnetic induction intensity generated by the magnetic element 21 is no less than 8000 gauss. Increasing the magnetic induction intensity increases the density of magnetic lines of force, thereby increasing the magnetic force exerted on an object, making it more easily attracted by the magnet. Under these conditions, magnetic impurities in falling powder can be attracted from the side. Optionally, the magnetic element 21 can be a permanent magnet or a ferromagnetic material.

[0041] To prevent electrode powder from falling onto the magnet and causing powder loss, the magnetic member 21 is configured to rotate, either driven or manually. In some embodiments, the demagnetization mechanism 20 further includes a drive member (not shown) for rotating the magnetic member 21. Optionally, the drive member can be a motor, such as a reduction motor. The motor's drive end can be an output shaft, which is in transmission connection with the magnetic member 21, such as through a gear drive or belt drive.

[0042] When using gear transmission, gears are provided on both the motor's drive end and the magnetic member 21, and transmission is achieved through gear meshing. Optionally, the gears can be spur gears, helical gears, or spiral gears. Optionally, each magnetic member 21 can be fitted with a gear, and multiple magnetic members 21 can be connected through gear meshing. When the motor drives one gear to rotate, the other gears rotate synchronously.

[0043] When using a belt drive, a ribbon of elastic material (such as rubber or polyurethane) is used to transmit power and motion. The belt passes around both the motor's drive end and the magnetic element 21, transmitting power through friction. When the motor drives the belt, the magnetic element 21 rotates synchronously. Optionally, the belt passes around all magnetic elements 21 simultaneously, so that rotation of the motor shaft drives all magnetic elements 21. Furthermore, additional belts can be installed between magnetic elements 21 for transmission.

[0044] In this embodiment, during the demagnetization process, the driving member can drive the magnetic member 21 to rotate continuously or periodically. Electrode powder that falls onto the magnetic member 21 can slide off the magnetic member 21 due to the rotation of the magnetic member 21, effectively solving the problem of electrode powder waste caused by electrode powder falling onto the magnetic member. Furthermore, since the electrode powder falls from top to bottom, magnetic impurities are generally adsorbed on the upper and side portions of the magnetic member. By rotating, the magnetic impurities can be uniformly adsorbed by the entire magnetic member 21, so that each magnetic member 21 can adsorb more magnetic impurities.

[0045] See also Figure 2 , Figure 2 FIG2 shows a side view of an electrode powder demagnetization device in one embodiment. In some embodiments, the demagnetization mechanism includes a first magnetic component group 22 and a second magnetic component group 23, and the first magnetic component group 22 and the second magnetic component group 23 each include a plurality of magnetic components 21. Figure 3 , Figure 3 A top view of an electrode powder demagnetization device according to an embodiment is shown. The projection formed by the magnetic members 21 of the first magnetic member group 22 along the first direction intersects with the projection formed by the magnetic members 21 of the second magnetic member group 23 along the first direction.

[0046] Wherein, any one magnetic member 21 of the first magnetic member group 22 intersects with the projection formed along the first direction of at least one magnetic member 21 of the second magnetic member group 23. Figure 3 In the embodiment, the projections of the magnetic members 21 of the first magnetic member group 22 and the second magnetic member group 23 on the horizontal plane are in a cross form. In this way, the distances between the multiple magnetic members 21 are close, which can increase the magnetic attraction range of the powder and improve the demagnetization effect.

[0047] In some embodiments, the demagnetization chamber 11 includes a first sub-demagnetization chamber and a second sub-demagnetization chamber, the first magnetic component group 22 is configured in the first sub-demagnetization chamber, and the second magnetic component group 23 is configured in the second sub-demagnetization chamber. In a feasible implementation, the main body 10 includes a first body 14 and a second body 15, the first body 14 is provided with a first sub-demagnetization chamber, the second body 15 is provided with a second sub-demagnetization chamber, and the first sub-demagnetization chamber and the second sub-demagnetization chamber are connected to form the demagnetization chamber 11. The powder to be demagnetized passes through the first sub-demagnetization chamber and the second sub-demagnetization chamber in sequence and is discharged.

[0048] Optionally, the first body 14 and the second body 15 are separable, such as the first body 14 and the second body 15 are detachably connected, which is convenient for replacement and maintenance and easy to assemble, making the assembly process simpler and more flexible, and the components can be disassembled and reassembled when needed, thereby improving production efficiency and assembly speed and adapting to different work requirements and environmental conditions.

[0049] Furthermore, after the magnetic member 21 has attracted a lot of magnetic impurities, it needs to be cleaned so as to be able to perform the next operation. When the first body 14 and the second body 15 are detachably connected, it is convenient to remove the magnetic member 21 after disassembly for cleaning.

[0050] In this embodiment, the demagnetization mechanism 20 is divided into a first magnetic component group 22 and a second magnetic component group 23, which are respectively located in the first cavity 14 and the second cavity 15. On the one hand, it is convenient for disassembly and maintenance, and on the other hand, the adsorption effect on magnetic impurities can be adjusted by the positional relationship of the magnetic components 21 of the first magnetic component group 22 and the second magnetic component group 23.

[0051] In some embodiments, the multiple magnetic parts 21 of the first magnetic part group 22 and / or the second magnetic part group 23 are divided into two columns along the first direction, and the spacing between the two columns of magnetic parts 21 gradually increases or decreases along the first direction. This arrangement increases the contact area between the electrode powder and the magnetic parts 21, and the magnetic parts 21 more fully attract magnetic particles, resulting in a more thorough demagnetization effect, thereby improving the purity of the electrode powder. Among them, the multiple magnetic parts 21 of the first magnetic part group 22 are divided into two columns along the first direction, and the spacing between the two columns of magnetic parts 21 gradually increases or decreases. The multiple magnetic parts 21 of the second magnetic part group 23 are divided into two columns along the first direction, and the spacing between the two columns of magnetic parts 21 gradually increases or decreases.

[0052] See also Figure 4A 、 Figure 4B 、 Figure 4C and Figure 4D , Figures 4A-4D 2 shows different arrangements of the magnetic members 21 in the first magnetic member group 22 and the second magnetic member group 23. Figure 4AA schematic diagram showing that the distance between two rows of magnetic elements 21 in the first magnetic element group 22 gradually increases along the first direction X in one embodiment is shown. Figure 4B A schematic diagram showing that the distance between two rows of magnetic elements 21 in the first magnetic element group 22 gradually decreases along the first direction X in one embodiment is shown. Figure 4C A schematic diagram showing that the distance between two rows of magnetic elements 21 in the second magnetic element group 23 gradually decreases along the first direction X in one embodiment is shown. Figure 4D A schematic diagram showing that the distance between two rows of magnetic elements 21 in the second magnetic element group 23 gradually increases along the first direction X in one embodiment is shown.

[0053] Continue to see Figure 2 In some embodiments, the plurality of magnetic members 21 of the first magnetic member group 22 and / or the second magnetic member group 23 are divided into two columns along the first direction, and the line connecting the magnetic members 21 in each column is parallel to the first direction. Alternatively, the plurality of magnetic members 21 of the first magnetic member group 22 are divided into two columns along the first direction, and the line connecting the magnetic members 21 in each column is parallel to the first direction. Alternatively, the plurality of magnetic members 21 of the second magnetic member group 23 are divided into two columns along the first direction, and the line connecting the magnetic members 21 in each column is parallel to the first direction.

[0054] With this arrangement, when the electrode powder flows along the first direction, it will only fall on the magnetic component 21 located at the front end, such as the magnetic component 21 located at the top. Compared with the scheme in which the multiple magnetic components 21 of the first magnetic component group 22 and the second magnetic component group 23 are at different distances, this embodiment can prevent the electrode powder from falling too much on the magnetic component 21 and causing electrode powder loss.

[0055] In one embodiment, the first sub-demagnetization cavity and the second sub-demagnetization cavity are rotatably connected, so that the angles of the first magnetic component group 22 and the second magnetic component group 23 can be adjusted respectively. In a feasible implementation, the first body 14 and the second body 15 are rotatably connected. In a feasible implementation, the first body 14 and the second body 15 are rotatably connected through a bearing. In another feasible implementation, a plurality of sliders distributed around the outside of the first body 14 are provided, and a slide groove is provided on the inside of the second body 15, and the slider can slide in the slide groove, so that the first body 14 and the second body 15 are rotatably connected.

[0056] With this arrangement, the angle between the projections of the magnetic member 21 in the first and second sub-demagnetization cavities on the horizontal plane can be changed by rotating the first body 14 and the second body 15, thereby changing the contact area between the magnetic member 21 and the electrode powder, thereby maximizing the magnetic attraction of the magnetic material.

[0057] Alternatively, the magnetic member 21 may be a strip or rod-shaped structure, such as a magnetic strip or rod. Alternatively, the magnetic member 21 extends through the main body 10, with two sections of the magnetic member 21 extending from the main body 10 and the middle section located within the demagnetization chamber 11. This arrangement allows the middle section located within the chamber 11 to magnetically attract the magnetic material when the demagnetized powder falls from the chamber 11.

[0058] The strip-shaped structure means that the magnetic member 21 can be square, and the rod-shaped structure means that the magnetic member 21 can be cylindrical. Furthermore, when the magnetic member 21 is a magnetic rod, it is easy to rotate.

[0059] In one feasible implementation, the main body 10 has multiple openings on its side, each of which is provided with a bearing. The magnetic member 21 is a magnetic rod, which is passed through the openings and is rotatably connected to the main body 10 via the bearing. This arrangement facilitates the driving member to drive the magnetic rod to rotate.

[0060] In one embodiment, the extension direction of the magnetic member 21 is a second direction, which is perpendicular to the first direction. The extension direction of the magnetic member 21 refers to the length direction of the magnetic member 21. Optionally, the second direction can be a horizontal direction. For example, if the magnetic member 21 is a magnetic rod, its length direction is its extension direction, that is, the magnetic rod is arranged horizontally. In this way, the powder can fully collide with the magnetic member 21 when falling, thereby improving the magnetic attraction effect on magnetic impurities.

[0061] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An electrode powder demagnetization device, characterized in that: The electrode powder demagnetization device comprises: A main body, wherein a demagnetization cavity is provided inside the main body, and the demagnetization cavity penetrates the main body along a first direction; and The demagnetization mechanism includes multiple magnetic parts, and the multiple magnetic parts are rotatably arranged in the demagnetization cavity. The demagnetization mechanism includes a first magnetic part group and a second magnetic part group. The first magnetic part group and the second magnetic part group both include multiple magnetic parts. The projection formed by the magnetic parts of the first magnetic part group along the first direction intersects with the projection formed by the magnetic parts of the second magnetic part group along the first direction.

2. The electrode powder demagnetization device according to claim 1, characterized in that: The demagnetization chamber includes a first sub-demagnetization chamber and a second sub-demagnetization chamber. The first magnetic component group is configured in the first sub-demagnetization chamber, and the second magnetic component group is configured in the second sub-demagnetization chamber.

3. The electrode powder demagnetization device according to claim 2, characterized in that: The first sub-magnetization removal cavity and the second sub-magnetization removal cavity are rotatably connected.

4. The electrode powder demagnetization device according to claim 1, characterized in that: The plurality of magnetic members of the first magnetic member group and / or the second magnetic member group are divided into two columns along the first direction, and the distance between the two columns of magnetic members gradually increases or decreases along the first direction.

5. The electrode powder demagnetization device according to claim 1, characterized in that: The plurality of magnetic members of the first magnetic member group and / or the second magnetic member group are divided into two columns along the first direction, and a connecting line of the magnetic members in each column is parallel to the first direction.

6. The electrode powder demagnetization device according to claim 1, characterized in that: The demagnetization mechanism further includes a driving member, which is used to drive the magnetic member to rotate.

7. The electrode powder demagnetization device according to claim 1, characterized in that: A plurality of openings are provided on the side surface of the main body, and the magnetic member is passed through the openings and is rotatably connected to the main body via a bearing.

8. The electrode powder demagnetization device according to claim 1, characterized in that: An extending direction of the magnetic member is perpendicular to the first direction.

9. The electrode powder demagnetization device according to claim 1, characterized in that: The electrode powder demagnetization device further includes a feed piece and a discharge piece. The feed piece is arranged at the feed port of the demagnetization chamber, and the discharge piece is arranged at the discharge port of the demagnetization chamber. The feed piece and / or the discharge piece are trumpet-shaped.

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