Magnetic iron removal device and method for lithium battery pole piece

Abstract

The present application relates to the technical field of battery production equipment, and more particularly to a magnetic iron removal device and method for lithium battery pole pieces. The technical scheme comprises a processing table assembly, a magnetic attraction distance adjustment assembly is installed at the top center of the processing table assembly, iron removal auxiliary assemblies are arranged on the upper and lower sides inside the magnetic attraction distance adjustment assembly, the magnetic attraction distance adjustment assembly comprises a mounting plate, the iron removal auxiliary assembly comprises a second multi-card plate positioning frame fixedly installed on one side of the mounting plate, and a second gear is rotatably installed on the side of the second multi-card plate positioning frame away from the mounting plate. The rotating directions of the threaded sleeve and the threaded rod are opposite, the combined thrust of the inserted clamping block along the opposite threads of the threaded sleeve and the threaded rod is opposite to the sliding direction of the first multi-card plate positioning frame, and the sliding direction is opposite to the initial entering direction of the lithium battery pole piece, so that the lithium battery pole piece side edge is effectively separated from the ferromagnetic impurities.

Description

Technical Field

[0001] This invention relates to the field of battery production equipment technology, and in particular to a magnetic iron removal device and method for lithium battery electrodes. Background Technology

[0002] Lithium-ion battery electrodes are one of the core components of lithium-ion batteries, and their quality directly affects the battery's energy density, cycle life, and safety. During electrode production, raw materials such as active materials (e.g., ternary materials, lithium iron phosphate), conductive agents (e.g., carbon black), and binders (e.g., PVDF) need to be mixed, coated, and rolled to form a sheet structure. However, during raw material handling, transportation, and processing, ferromagnetic impurities (such as ferromagnetic impurities, iron powder, and magnetic particles) can easily be introduced onto the surface or inside the electrode.

[0003] While existing devices have improved magnetic field strength, the magnetic field strength at the edge of the magnet (≤10mm from the edge of the electrode) is only 60% of that at the center. This means that the magnetic field cannot completely clean the edge of the lithium battery electrode, resulting in a ferromagnetic impurity residue rate of >5% in the edge area. At the same time, because sheet-like or chain-like ferromagnetic impurities are easily "wrapped" by the folds and gaps between particles of the electrode, they are difficult to be effectively captured by the magnetic field, resulting in low iron removal efficiency of existing magnetic iron removal devices for lithium battery electrodes. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the background art by proposing a magnetic iron removal device and method for lithium battery electrodes.

[0005] The technical solution of the present invention: a magnetic iron removal device for lithium battery electrode sheets, including a processing table assembly, wherein a magnetic spacing adjustment assembly is installed at the top center of the processing table assembly, and iron removal auxiliary components are provided on both the upper and lower sides inside the magnetic spacing adjustment assembly. The magnetic spacing adjustment assembly includes a mounting plate. The iron removal auxiliary assembly includes a second multi-plate positioning frame fixedly installed on one side of the mounting plate. A second gear is mounted on the side of the second multi-plate positioning frame away from the mounting plate via a motor. Two sets of third gears are meshed on both sides of the second gear. A first multi-plate positioning frame is rotatably mounted on the outer side of the third gear. A threaded rod is fixedly mounted on one side of the third gear extending to the first multi-plate positioning frame. A threaded sleeve is rotatably mounted on the outer side of the threaded rod. The threaded sleeve is rotatably mounted on the outer side of the first multi-plate positioning frame. An engagement block is slidably mounted at the threaded junction of the threaded sleeve and the threaded rod. A telescopic positioning frame is fixedly mounted on the outer side of the engagement block. A collar roller is rotatably mounted inside the telescopic positioning frame. The engagement block is slidably mounted inside the first multi-plate positioning frame. Optionally, the threads of the threaded sleeve and the threads of the threaded rod are configured in opposite directions, and the lead of the thread groove of the threaded rod is twice that of the lead of the thread groove of the threaded sleeve.

[0006] Optionally, the iron removal auxiliary component is installed on the same side inside the magnetic spacing adjustment component, and the magnetic component includes a first magnetic frame fixedly installed on one side of the mounting plate, and a second magnetic frame fixedly installed on one side of the first magnetic frame.

[0007] Optionally, the second magnetic holder is a weak magnetic attraction area, and the first magnetic holder is a strong magnetic attraction area.

[0008] Optionally, the outer side of the second gear is meshed with the first gear, and an adsorption cleaning roller is fixedly installed on the side of the first gear away from the second multi-plate positioning frame.

[0009] Optionally, the magnetic spacing adjustment assembly includes a protective frame that is slidably mounted on the outside of the mounting plate, and the number of mounting plates is two sets, with the two sets of mounting plates arranged face to face.

[0010] Optionally, the processing table assembly includes a support frame fixedly installed on the outer wall of the protective frame, a front conveyor roller assembly is provided on the top of the support frame and on one side of the protective frame, and a rear conveyor roller assembly is provided on the top of the support frame and on the other side of the protective frame.

[0011] Optionally, the magnetic spacing adjustment assembly further includes a protective baffle fixedly installed on the outside of the protective frame. An eccentric wheel is rotatably installed inside the protective baffle. Two sets of inclined connecting rods are hinged to the top and bottom of the eccentric wheel. Two sets of bidirectional clamping blocks are hinged to the outside of the two sets of inclined connecting rods. There are two sets of bidirectional clamping blocks. One set of bidirectional clamping blocks is fixedly installed on the top of the mounting plate, and the protective baffle is fixedly installed on the top of the other set of bidirectional clamping blocks.

[0012] Optionally, a support column is fixedly installed inside the protective baffle, and two limiting rings are slidably installed on the outside of the support column. One of the limiting rings is fixedly installed on the inner wall of the protective frame, and a lower protective frame is fixedly installed at the bottom of the protective frame. The other limiting ring is fixedly installed on the inner wall of the lower protective frame. An auxiliary push plate is fixedly installed inside the lower protective frame, passing through one side of the mounting plate.

[0013] On the other hand, this application provides: a method for magnetic removal of iron from lithium battery electrodes, comprising the following steps: S1: The lithium battery electrode sheet is unwound at a constant speed by the unwinding machine and guided by the guide rollers mounted on the front conveyor roller group into the entrance of the magnetic spacing adjustment component. As the front conveyor roller group pushes, the lithium battery electrode sheet enters the magnetic spacing adjustment component for magnetic removal of iron. S2: The output of the first forward and reverse motor drives the eccentric wheel to rotate along the protective baffle. The eccentric wheel drives the tilting link to deflect outward or inward. Then the eccentric wheel first drives the protective baffle to move through a tilting link. The corresponding magnetic spacing is adjusted according to the thickness of the lithium battery electrode and the magnetic attraction strength given to the lithium battery electrode. S3: The second forward and reverse motor drives the second gear to rotate. The second gear meshes with two sets of third gears to drive the two sets of third gears to rotate. The third gear rotates along the first multi-plate positioning frame. The third gear drives the threaded sleeve to rotate. According to the processing accuracy requirements, the rotation direction of the threaded sleeve and the threaded rod is adjusted. The ferromagnetic impurities on the side of the lithium battery electrode are cleaned by the collar roller. S4: When the lithium battery electrode passes through the area of ​​weak magnetic attraction, the ferromagnetic impurities are scraped out by the rotating adsorption cleaning roller. S5: When the lithium battery electrode passes through the strong magnetic attraction area, the ferromagnetic impurities are attracted by the gradient magnetic field generated on the surfaces of the first and second magnetic holders. The ferromagnetic impurities overcome the friction between gravity and the electrode, detach from the electrode surface and adhere to the magnet surface, and the lithium battery electrode completes the magnetic removal step.

[0014] In summary, this application includes at least one of the following beneficial technical effects: 1. Since the rotation directions of the threaded sleeve and the threaded rod are opposite, the insertion block slides along the groove of the first multi-plate positioning frame along the combined thrust of the threaded sleeve and the threaded rod overlapping in the opposite direction, and the sliding direction is opposite to the initial entry direction of the lithium battery electrode, thereby better separating the ferromagnetic impurities on the side of the lithium battery electrode. 2. The protective baffle drives the support column to move up or down along the limiting collar and the mounting plate. Due to the symmetrical deflection of the eccentric wheel, the moving directions of the mounting plate and the protective baffle are opposite. Then, according to the thickness of the lithium battery electrode and the magnetic attraction strength applied to the lithium battery electrode, the corresponding magnetic attraction distance is adjusted by the deflection of the eccentric wheel, so as to better remove iron from the lithium battery electrode. 3. As the lithium battery electrode enters the strong magnetic attraction area, the first magnetic holder adjusts the distance between itself and the lithium battery electrode through the magnetic attraction spacing adjustment component, further increasing the magnetic attraction strength. The strong magnetic attraction area then completely separates ferromagnetic impurities from the lithium battery electrode, thereby protecting the lithium battery electrode from iron while saving the power cost of magnetic attraction and improving the efficiency of magnetic iron removal. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a magnetic iron removal device for lithium battery electrodes. Figure 2 This is a schematic diagram of the protective frame structure; Figure 3 for Figure 2 Enlarged view of region A in the middle; Figure 4 This is a schematic diagram of the structure of the adsorption cleaning roller; Figure 5 This is a schematic diagram of the threaded sleeve structure; Figure 6 This is a schematic diagram of the threaded rod. Figure 7 This is a structural schematic diagram of the protective baffle; Figure 8 This is a schematic diagram of the eccentric rotor.

[0016] Reference numerals: 1. Processing table assembly; 101. Support frame; 102. Rear conveyor roller assembly; 103. Front conveyor roller assembly; 2. Magnetic spacing adjustment assembly; 201. Protective frame; 202. Support column; 203. Mounting plate; 204. Limiting collar; 205. Lower protective frame; 206. Eccentric wheel; 207. Protective baffle; 208. Inclined connecting rod; 209. Two-way clamping block; 3. Magnetic suction assembly; 301. First magnetic suction holder; 302. Second magnetic suction holder; 4. Iron removal auxiliary components; 401. Adsorption cleaning roller; 402. First multi-plate positioning frame; 403. Second multi-plate positioning frame; 404. Telescopic positioning frame; 405. Collar roller; 406. First gear; 407. Second gear; 408. Third gear; 409. Threaded sleeve; 410. Threaded rod; 411. Insertion block. Detailed Implementation

[0017] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0019] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] like Figure 1 , Figure 7 and Figure 8 As shown, a magnetic iron removal device for lithium battery electrode sheets includes a processing table assembly 1, a magnetic spacing adjustment assembly 2 is installed at the top center of the processing table assembly 1, and iron removal auxiliary assemblies 4 are provided on both the upper and lower sides inside the magnetic spacing adjustment assembly 2. The processing table assembly 1 includes a support frame 101 fixedly installed on the outer wall of the protective frame 201. A front conveying roller group 103 is provided on the top of the support frame 101 and on one side of the protective frame 201, and a rear conveying roller group 102 is provided on the top of the support frame 101 and on the other side of the protective frame 201. The magnetic suction distance adjustment assembly 2 includes a mounting plate 203. The magnetic suction distance adjustment assembly 2 also includes a protective baffle 207 fixedly installed on the outside of the protective frame 201. An eccentric wheel 206 is rotatably installed inside the protective baffle 207. Two sets of inclined connecting rods 208 are hinged to the top and bottom of the eccentric wheel 206. Two sets of bidirectional clamping blocks 209 are hinged to the outside of the two sets of inclined connecting rods 208. There are two sets of bidirectional clamping blocks 209. One set of bidirectional clamping blocks 209 is fixedly installed on the top of the mounting plate 203, and the protective baffle 207 is fixedly installed on the top of the other set of bidirectional clamping blocks 209. To further explain, a support column 202 is fixedly installed inside the protective baffle 207. Two limiting collars 204 are slidably installed on the outside of the support column 202. One limiting collar 204 is fixedly installed on the inner wall of the protective frame 201. A lower protective frame 205 is fixedly installed at the bottom of the protective frame 201. The other limiting collar 204 is fixedly installed on the inner wall of the lower protective frame 205. An auxiliary push plate is fixedly installed inside the lower protective frame 205 through one side of the support column 202, which passes through the mounting plate 203. The lithium battery electrode sheet is uniformly unwound by the unwinding machine and guided into the entrance of the magnetic spacing adjustment component 2 by the guide rollers mounted on the front conveyor roller group 103. As the front conveyor roller group 103 pushes, the lithium battery electrode sheet enters the magnetic spacing adjustment component 2 for magnetic removal of iron. Then, under the continued pushing of the front conveyor roller group 103, the lithium battery electrode sheet enters the rear conveyor roller group 102 and enters the next processing area through the rear conveyor roller group 102. Meanwhile, a first forward and reverse motor is fixedly installed on the side of the mounting plate 203 away from the eccentric wheel 206. The output end of the first forward and reverse motor drives the eccentric wheel 206 to rotate along the protective baffle 207. The eccentric wheel 206 drives the inclined connecting rod 208 to deflect outward or inward. The eccentric wheel 206 first drives the protective baffle 207 to move upward or downward through an inclined connecting rod 208. The protective baffle 207 drives the support column 202 to move upward or downward along the limiting collar 204 and the mounting plate 203. Due to the symmetrical deflection of the eccentric wheel 206, the moving directions of the mounting plate 203 and the protective baffle 207 are opposite. Thus, according to the thickness of the lithium battery electrode and the magnetic attraction strength applied to the lithium battery electrode, the deflection of the eccentric wheel 206 adjusts the corresponding magnetic attraction distance, thereby better removing iron from the lithium battery electrode.

[0023] like Figure 2 As shown, the iron removal auxiliary component 4 is located on the same side as the magnetic suction component 3 inside the magnetic suction spacing adjustment component 2. The magnetic suction component 3 includes a first magnetic suction frame 301 fixedly installed on one side of the mounting plate 203, and a second magnetic suction frame 302 fixedly installed on one side of the first magnetic suction frame 301. The second magnetic suction frame 302 is a weak magnetic suction area, and the first magnetic suction frame 301 is a strong magnetic suction area. The second magnetic suction frame 302 faces the front conveying roller group 103, and the first magnetic suction frame 301 faces the rear conveying roller group 102. For lithium battery plates that initially enter the protective frame 201, they first enter the weak magnetic suction area. The weak magnetic suction area first adsorbs the ferromagnetic impurities on the surface of the lithium battery plates. With the cleaning of the iron removal auxiliary component 4, the ferromagnetic impurities can be quickly and completely separated from the lithium battery plates. Then, when entering the strong magnetic suction area, the ferromagnetic impurities can be cleaned more quickly.

[0024] like Figures 2-6As shown, the iron removal auxiliary component 4 includes a second multi-plate positioning frame 403 fixedly installed on one side of the mounting plate 203. A second gear 407 is rotatably mounted on the side of the second multi-plate positioning frame 403 away from the mounting plate 203 via a motor. Two sets of third gears 408 are meshed on both sides of the second gear 407. A first multi-plate positioning frame 402 is rotatably mounted on the outer side of the third gears 408. A threaded rod 410 is fixedly mounted on one side of the first multi-plate positioning frame 402 extending from the third gear 408. A threaded sleeve 409 is rotatably mounted on the outer side of the threaded rod 410. The threaded sleeve 409 is rotatably mounted on the outer side of the first multi-plate positioning frame 402. An insertion block 411 is slidably mounted at the threaded junction of the threaded sleeve 409 and the threaded rod 410. A telescopic locking frame 404 is fixedly installed on the outside of the locking block 411. A collar roller 405 is rotatably installed inside the telescopic locking frame 404. The locking block 411 is slidably installed inside the first multi-plate positioning frame 402. The threads of the threaded sleeve 409 and the threaded rod 410 are set in opposite directions. The lead of the thread groove of the threaded rod 410 is twice that of the thread groove of the threaded sleeve 409. When the lithium battery electrode enters the protective frame 201, a second forward and reverse motor is fixedly installed on the top of the mounting plate 203. The second forward and reverse motor drives the second gear 407 to rotate. The second gear 407 drives the two sets of third gears 408 to rotate by meshing with them. The third gears 408 rotate along the first multi-plate positioning frame 402. The third gear 408 drives the threaded sleeve 409 to rotate. The threaded sleeve 409 passes through the rear conveyor roller group 102 and is fixedly installed on one side. A fan blade is installed between the third forward and reverse motor and the threaded sleeve 409. The threaded sleeve 409 drives the fan blade to rotate. The fan blade blows away the ferromagnetic impurities in the protective frame 201, which can accelerate the separation of the ferromagnetic impurities. If the processing accuracy requirement of the lithium battery electrode is low, the rotation direction of the threaded sleeve 409 and the threaded rod 410 is the same. Then the insertion block 411 is stuck in the groove of the first multi-plate positioning frame 402 and in the thread where the threaded sleeve 409 and the threaded rod 410 overlap. At this time, the periphery of the lithium battery electrode contacts the collar roller 405, and the collar roller 405 scrapes away the ferromagnetic impurities on the periphery. This facilitates the magnetic attraction of the magnetic component 3. If the processing precision requirements of the lithium battery electrode are high, the rotation directions of the threaded sleeve 409 and the threaded rod 410 are opposite. The insertion block 411 slides along the groove of the first multi-plate positioning frame 402 along the combined thrust of the overlapping threads of the threaded sleeve 409 and the threaded rod 410, and the sliding direction is opposite to the initial entry direction of the lithium battery electrode. This allows for better separation of ferromagnetic impurities on the side of the lithium battery electrode. At the same time, the sliding direction of the other set of collar rollers 405 is the same as the movement direction of the lithium battery electrode towards the rear conveying roller group 102. At this time, the ferromagnetic impurities on the side of the lithium battery electrode are attracted out by the first magnetic frame 301, and the other set of collar rollers 405 can effectively prevent wear on the side of the lithium battery electrode.Simultaneously, when a single lithium battery electrode sheet is processed and fed into the rear conveyor roller group 102, the two sets of collar rollers 405 quickly return to their original positions; When the distance between the two sets of mounting plates 203 increases or decreases, the corresponding collar roller 405 moves along the telescopic positioning frame 404. The collar roller 405 can slide inside the telescopic positioning frame 404 to adjust the distance.

[0025] Meanwhile, the outer side of the second gear 407 is meshed with the first gear 406. An adsorption cleaning roller 401 is fixedly installed on the side of the first gear 406 away from the second multi-plate positioning frame 403. Since sheet-like or chain-like ferromagnetic impurities are easily "wrapped" by the folds and gaps between particles in the electrode sheet, the adsorption cleaning roller 401, equipped with cleaning components such as brushes, can separate the ferromagnetic impurities trapped in the gaps to a certain extent. However, if strong magnetic adsorption continues, when the adsorbed ferromagnetic impurities come into contact with the adsorption cleaning roller 401, they will slide along with the roller and onto the lithium battery electrode sheet. This may cause excessive scratching of the lithium battery electrode sheet, resulting in damage. Furthermore, with the lithium battery... As the battery electrode initially enters the weak magnetic attraction region, ferromagnetic impurities undergo micro-separation with the intervention of the magnetic field. At this time, the front conveying roller group 103 continues to push the weak magnetic attraction region, and the second gear 407 drives the first gear 406 to rotate. The adsorption cleaning roller 401 scrapes out the ferromagnetic impurities by rotating, and the micro-separated ferromagnetic impurities are roughly separated from the lithium battery electrode. At this time, as the lithium battery electrode enters the strong magnetic attraction region, the first magnetic suction frame 301 adjusts the distance between itself and the lithium battery electrode through the magnetic suction distance adjustment component 2 to further increase the magnetic attraction strength. Then, the strong magnetic attraction region completely separates the ferromagnetic impurities from the lithium battery electrode, thereby protecting the lithium battery electrode from iron removal while saving the power cost of magnetic attraction and improving the efficiency of magnetic attraction iron removal.

[0026] A method for magnetically removing iron from lithium battery electrodes, using the magnetically removing iron from lithium battery electrodes according to claim 9, characterized by comprising the following steps: S1: The lithium battery electrode sheet is unwound at a constant speed by the unwinding machine and guided into the inlet of the magnetic spacing adjustment component 2 by the guide roller mounted on the front conveying roller group 103. As the front conveying roller group 103 pushes, the lithium battery electrode sheet enters the magnetic spacing adjustment component 2 for magnetic removal of iron. S2: The output end of the first forward and reverse motor drives the eccentric wheel 206 to rotate along the protective baffle 207. The eccentric wheel 206 drives the inclined connecting rod 208 to deflect outward or inward. Then the eccentric wheel 206 first drives the protective baffle 207 to move through an inclined connecting rod 208, and adjusts the corresponding magnetic spacing according to the thickness of the lithium battery electrode and the magnetic attraction strength given to the lithium battery electrode. S3: The second forward and reverse motor drives the second gear 407 to rotate. The second gear 407 meshes with two sets of third gears 408 to drive the two sets of third gears 408 to rotate. The third gears 408 rotate along the first multi-plate positioning frame 402. The third gears 408 drive the threaded sleeve 409 to rotate. According to the processing accuracy requirements, the threaded sleeve 409 adjusts the rotation direction with the threaded rod 410. The collar roller 405 assists in cleaning the ferromagnetic impurities on the side of the lithium battery electrode. S4: When the lithium battery electrode passes through the weak magnetic attraction area, the ferromagnetic impurities are scraped out by the rotating adsorption cleaning roller 401. S5: When the lithium battery electrode passes through the strong magnetic attraction area, the ferromagnetic impurities are attracted by the gradient magnetic field generated on the surfaces of the first magnetic holder 301 and the second magnetic holder 302. The ferromagnetic impurities overcome the friction between gravity and the electrode, detach from the electrode surface and adsorb onto the magnet surface, and the lithium battery electrode completes the magnetic removal step.

[0027] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A magnetic iron removal device for lithium battery electrodes, comprising a processing table assembly (1), characterized in that: The processing table assembly (1) is equipped with a magnetic spacing adjustment assembly (2) at the top center, and iron removal auxiliary assemblies (4) are provided on both the upper and lower sides inside the magnetic spacing adjustment assembly (2). The magnetic spacing adjustment assembly (2) includes a mounting plate (203). The iron removal auxiliary assembly (4) includes a second multi-plate positioning frame (403) fixedly installed on one side of the mounting plate (203). A second gear (407) is rotatably mounted on the side of the second multi-plate positioning frame (403) away from the mounting plate (203) via a motor. Two sets of third gears (408) are meshed on both sides of the second gear (407). A first multi-plate positioning frame (402) is rotatably mounted on the outer side of the third gear (408). The third gear (408) extends to the first multi-plate positioning frame (402). A threaded rod (410) is fixedly installed on one side. A threaded sleeve (409) is rotatably installed on the outer side of the threaded rod (410). The threaded sleeve (409) is rotatably installed on the outer side of the first multi-plate positioning frame (402). A locking block (411) is slidably installed at the threaded junction of the threaded sleeve (409) and the threaded rod (410). A telescopic positioning frame (404) is fixedly installed on the outer side of the locking block (411). A collar roller (405) is rotatably installed inside the telescopic positioning frame (404). The locking block (411) is slidably installed inside the first multi-plate positioning frame (402). The iron removal auxiliary component (4) is located inside the magnetic suction spacing adjustment component (2) and a magnetic suction component (3) is installed on the same side. The magnetic suction component (3) includes a first magnetic suction frame (301) fixedly installed on one side of the mounting plate (203), and a second magnetic suction frame (302) fixedly installed on one side of the first magnetic suction frame (301). The second magnetic chuck (302) is a weak magnetic attraction area, and the first magnetic chuck (301) is a strong magnetic attraction area; The second gear (407) is meshed with the first gear (406) on its outer side, and an adsorption cleaning roller (401) is fixedly installed on the side of the first gear (406) away from the second multi-plate positioning frame (403).

2. The magnetic iron removal device for lithium battery electrodes according to claim 1, characterized in that, The threads of the threaded sleeve (409) and the threads of the threaded rod (410) are arranged in opposite directions, and the thread groove lead of the threaded rod (410) is twice that of the thread groove lead of the threaded sleeve (409).

3. The magnetic iron removal device for lithium battery electrodes according to claim 2, characterized in that, The magnetic spacing adjustment assembly (2) includes a protective frame (201) that is slidably installed on the outside of the mounting plate (203). There are two sets of mounting plates (203), and the two sets of mounting plates (203) are arranged face to face.

4. The magnetic iron removal device for lithium battery electrodes according to claim 3, characterized in that, The processing table assembly (1) includes a support frame (101) fixedly installed on the outer wall of the protective frame (201). A front conveying roller group (103) is provided on the top of the support frame (101) and on one side of the protective frame (201), and a rear conveying roller group (102) is provided on the top of the support frame (101) and on the other side of the protective frame (201).

5. The magnetic iron removal device for lithium battery electrodes according to claim 4, characterized in that, The magnetic spacing adjustment assembly (2) also includes a protective baffle (207) fixedly installed on the outside of the protective frame (201). An eccentric wheel (206) is rotatably installed inside the protective baffle (207). Two sets of inclined connecting rods (208) are hinged to the top and bottom of the eccentric wheel (206). Two sets of bidirectional clamping blocks (209) are hinged to the outside of the two sets of inclined connecting rods (208). There are two sets of bidirectional clamping blocks (209). One set of bidirectional clamping blocks (209) is fixedly installed on the top of the mounting plate (203), and the protective baffle (207) is fixedly installed on the top of the other set of bidirectional clamping blocks (209).

6. The magnetic iron removal device for lithium battery electrodes according to claim 5, characterized in that, A support column (202) is fixedly installed inside the protective baffle (207). Two limiting collars (204) are slidably installed on the outside of the support column (202). One of the limiting collars (204) is fixedly installed on the inner wall of the protective frame (201). A lower protective frame (205) is fixedly installed at the bottom of the protective frame (201). The other limiting collar (204) is fixedly installed on the inner wall of the lower protective frame (205). An auxiliary push plate is fixedly installed inside the lower protective frame (205) through one side of the mounting plate (203).

7. A method for magnetically removing iron from lithium battery electrodes, using the magnetically removing iron from lithium battery electrodes as described in claim 6, characterized in that, Includes the following steps: S1: The lithium battery electrode sheet is unwound at a constant speed by the unwinding machine and guided into the entrance of the magnetic spacing adjustment component (2) by the guide roller mounted on the front conveying roller group (103). As the front conveying roller group (103) pushes, the lithium battery electrode sheet enters the magnetic spacing adjustment component (2) for magnetic removal of iron. S2: The output end of the first forward and reverse motor drives the eccentric wheel (206) to rotate along the protective baffle (207). The eccentric wheel (206) drives the inclined connecting rod (208) to deflect outward or inward. Then the eccentric wheel (206) first drives the protective baffle (207) to move through an inclined connecting rod (208). The corresponding magnetic spacing is adjusted according to the thickness of the lithium battery electrode and the magnetic attraction strength given to the lithium battery electrode. S3: The second forward and reverse motor drives the second gear (407) to rotate. The second gear (407) drives the two sets of third gears (408) to rotate by meshing with them. The third gears (408) rotate along the first multi-plate positioning frame (402). The third gears (408) drive the threaded sleeve (409) to rotate. According to the processing accuracy requirements, the threaded sleeve (409) adjusts the rotation direction with the threaded rod (410). The collar roller (405) assists in cleaning the ferromagnetic impurities on the side of the lithium battery electrode. S4: When the lithium battery electrode passes through the weak magnetic attraction area, the ferromagnetic impurities are scraped out by the rotation of the adsorption cleaning roller (401). S5: When the lithium battery electrode passes through the magnetic strong region, the ferromagnetic impurities are attracted by the gradient magnetic field generated by the surfaces of the first magnetic holder (301) and the second magnetic holder (302). The ferromagnetic impurities overcome the friction between gravity and the electrode, detach from the electrode surface and adsorb onto the magnet surface, and the lithium battery electrode completes the magnetic removal step.

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