Powder lithium battery negative electrode material demagnetizing device

Abstract

The invention relates to the technical field of demagnetizing equipment, and particularly discloses a powdery lithium battery negative electrode material demagnetizing device which comprises a main body structure, a driving structure, a demagnetizing structure and a discharging structure, the driving structure is movably arranged on the main body structure and can rotate, the demagnetizing structure is fixedly arranged on the driving structure, the discharging structure is fixedly arranged on the main body structure, the discharging structure is located on the right side of the demagnetizing structure, and the discharging structure is attached to the demagnetizing structure. The technical problem that existing equipment can only adsorb large-particle magnetic impurities or can only eliminate residual magnetism is solved. On one hand, a stable magnetic field is generated through the magnetic rods evenly distributed on the inner wall of the demagnetizing furnace, micro-nano weak magnetic impurities in powder can be efficiently adsorbed in the rotating process of the demagnetizing furnace, and the adsorption efficiency is improved compared with traditional single magnetic separation equipment; and on the other hand, the electric heating rod arranged in the demagnetizing furnace is matched with the design of the heat insulation plate, accurate temperature control can be achieved in a closed space, and powder residual magnetism is thoroughly eliminated.

Description

Technical Field

[0001] This invention relates to the field of demagnetizing equipment technology, specifically to a demagnetizing device for powdered lithium battery negative electrode materials. Background Technology

[0002] In the field of lithium battery manufacturing, the anode material, as the core carrier for battery energy storage and release, directly determines the energy density, cycle life, and safety performance of the lithium battery. Powdered lithium battery anode materials are highly susceptible to the introduction of magnetic impurities such as iron, nickel, and cobalt during preparation and transport due to equipment wear and environmental adsorption. These magnetic impurities not only exacerbate the risk of micro-short circuits in the battery's internal electrodes but also reduce ion conduction efficiency, leading to battery capacity decay, abnormal heating, and even safety accidents. Therefore, efficient demagnetization of powdered lithium battery anode materials is a crucial step in lithium battery production. However, existing equipment has the following significant drawbacks in practical applications: The equipment uses a single magnetic separator, which can only adsorb impurities with larger particle sizes or stronger magnetic properties. Its adsorption efficiency for micro / nano-sized magnetic particles or weakly magnetic impurities is extremely low, easily leading to impurity residue. While a single high-temperature demagnetizing device can eliminate residual magnetism, it cannot remove the magnetic impurities themselves, leaving them in the powder and potentially negatively impacting battery performance. Although some equipment attempts to combine both methods, the connection between magnetic adsorption and high-temperature treatment is poor. For example, when the powder enters the high-temperature furnace after magnetic separation, impurities are easily mixed in again, or environmental magnetic particles are re-adsorbed during the cooling process after high-temperature treatment. Uneven contact between the powder and the demagnetizing components results in low demagnetization efficiency, easily leading to localized accumulation or missed contact, resulting in inconsistent demagnetization effects. Summary of the Invention

[0003] The purpose of this invention is to solve the technical problems of existing demagnetizing equipment having a single demagnetizing method, complex connection, and easy increase of impurities, and to provide a demagnetizing device for powdered lithium battery negative electrode materials.

[0004] To address the aforementioned problems, this invention provides the following technical solution: a demagnetizing device for powdered lithium battery negative electrode materials, comprising a main structure, a driving structure, a demagnetizing structure, and a feeding structure; the driving structure is movably mounted on the main structure and is rotatable; the demagnetizing structure is fixedly mounted on the driving structure; the feeding structure is fixedly mounted on the main structure, located to the right of the demagnetizing structure, and is in contact with the demagnetizing structure; wherein, the main structure is used to support and collect the processed powder, the driving structure can drive the demagnetizing structure to rotate, and the rotation of the demagnetizing structure brings the powder in the feeding structure into contact, causing magnetic impurities to rotate and move out of the feeding structure, thereby achieving the demagnetizing effect; furthermore, through the drum-like structure of the demagnetizing structure, it can also cooperate with the feeding structure to place the powder inside for demagnetization treatment at high temperature.

[0005] Preferably, the main structure includes a base, a shaft frame, a pair of bearings, a controller, a first motor, an arm, a scraper seat, and a material collection assembly; the shaft frame is L-shaped, one end of the shaft frame is fixedly mounted on the upper left wall of the base and close to the front side, the pair of bearings are symmetrically embedded in the shaft frame, the controller is fixedly mounted on the front side wall of one end of the shaft frame, the first motor is fixedly mounted on the shaft frame, and the drive end of the first motor is fixedly passed through the middle of one of the bearings, one end of the arm is fixedly mounted on the other end of the shaft frame, and the arm is located between the two bearings, the scraper seat is fixedly mounted on the other end of the arm, the lower inner wall of the scraper seat is an inclined wall, and the material collection assembly is fixedly mounted on the upper wall of the base and located below the other end of the shaft frame.

[0006] Preferably, the receiving assembly includes a first slide rail, a second slide rail, a first pulley, a socket, a collection box, two pairs of second pulleys, a lock seat, a lock rod, and a spring; the first slide rail is fixedly mounted on the upper front wall of the base, and the first slide rail is parallel to the other end of the shaft frame; one end of the second slide rail is fixedly mounted on the first slide rail, and the second slide rail moves left and right via the first slide rail; the first pulley is fixedly mounted in the middle of the lower wall of the second slide rail, and the first pulley rotates in contact with the base; one end of the socket is fixedly mounted on the second slide rail, and the socket moves back and forth via the second slide rail; the other end of the socket has a socket hole in the middle; the collection box is movably mounted on the upper wall of the base; two pairs of second pulleys are fixedly mounted at the four corners of the lower wall of the collection box; the lock seat is fixedly mounted on the left side wall of the collection box; one end of the lock rod is movably embedded in the lock seat, and one end of the lock rod can move up and down along the lock seat; the spring is fixedly mounted on the upper wall of one end of the lock rod, and the spring is located in the lock seat; the other end of the lock rod can be inserted into the socket hole.

[0007] Preferably, the drive structure includes a drive shaft, a sealing plate, a pair of first hydraulic cylinders, a push plate, a pair of pulleys, and a belt; one end of the drive shaft is fixedly inserted through the middle of another bearing and located on the other end of the shaft frame; the sealing plate is fixedly installed on the other end of the drive shaft and located on the rear side of the shaft frame; one end of each pair of first hydraulic cylinders is fixedly inserted through the sealing plate, and the first hydraulic cylinders are symmetrically arranged on both sides of the drive shaft; the pair of first hydraulic cylinders are respectively located on the rear side of the shaft frame; the push plate is fixedly installed between the telescopic ends of the pair of first hydraulic cylinders, and the push plate is equidistantly provided with two pairs of semi-circular scraping holes; the pair of pulleys are respectively fixedly installed on one end of the drive shaft and the drive end of the first motor; and both ends of the belt are movably fitted onto the pulleys.

[0008] Preferably, the demagnetizing structure includes a demagnetizing furnace, a heat insulation plate, two pairs of heating rods, several magnetic rods, a first electric push rod, a push arm, and a feeding seat; the demagnetizing furnace is a tubular structure, one end of which is detachably fastened to a sealing plate, and the demagnetizing furnace is fitted onto the push plate; an L-shaped mounting groove is provided on one side wall of the demagnetizing furnace near one end, and one end of the mounting groove communicates with the inner wall of the demagnetizing furnace; the heat insulation plate is fixedly laid on the inner wall of the demagnetizing furnace; and the two pairs of heating rods are respectively equidistantly arranged on the demagnetizing furnace. The inner wall of the magnetic furnace is fitted with the scraping groove of the electric heating rod and the push plate. Several magnetic rods are equidistantly inserted into the inner wall of the demagnetizing furnace, and the magnetic rods are close to the outer wall of the demagnetizing furnace. The first electric push rod is fixedly set in the other end of the mounting groove on the side wall of the demagnetizing furnace, and is located above one end of the mounting groove in an alternating and symmetrical manner. One end of the push arm is fixedly set on the telescopic end of the first electric push rod. The feeding seat is fixedly set on the other end of the push arm, and the feeding seat is movably inserted into one end of the mounting groove for sealing and blocking.

[0009] Preferably, the feeding structure includes a base, a hopper, a pair of connecting arms, a discharge plate, a pair of second electric push rods, a pair of second hydraulic cylinders, a third slide rail, a stop bar, a second motor, and a flap. One end of the base is movably mounted on the drive shaft, and one end of the base is located between the first hydraulic cylinder and the shaft frame. The base is L-shaped, and the other end of the base is located on the right side of the demagnetizing furnace. The hopper is fixedly mounted on the other end of the base, and a discharge port is provided at the bottom of the left side wall of the hopper. The discharge port fits snugly against the right side wall of the demagnetizing furnace. A displacement groove is provided through the right side wall of the hopper. The pair of connecting arms are symmetrically arranged on the right side wall of the hopper and near the top. The discharge plate is movably embedded in the bottom of the hopper, and the upper wall of the discharge plate is an inclined surface. A pair of second electric push rods are movably connected at one end to the connecting arm, and the telescopic ends of the second electric push rods are movably connected to the discharge plate. The telescopic extension of the second electric push rods causes the discharge plate to flip. A pair of second hydraulic cylinders are movably mounted at one end on the upper right wall of the base, and the telescopic ends of the second hydraulic cylinders are inclined and movably connected to the connecting arm. The third slide rail is fixedly mounted on the right side wall of the material box and located above the displacement groove. The stop rod is movably inserted into the displacement groove and is fixedly connected to the third slide rail. The second motor is fixedly mounted in the middle of the stop rod, and the drive end of the second motor movably passes through the stop rod. The drive end of the second motor is located inside the material box. One end of the flip plate is fixedly mounted on the drive end of the second motor.

[0010] Preferably, the length of the stop bar is greater than that of the displacement groove, and the stop bar moves via a third slide rail.

[0011] Preferably, the flap can be tilted and moved back and forth along the displacement groove.

[0012] Preferably, in order to ensure that the material is fully in contact with the outer wall of the demagnetizing furnace, the material box is extended and retracted by a second hydraulic cylinder, and rotated at a certain angle around the drive shaft with the help of the box base support.

[0013] The present invention provides a demagnetizing device for powdered lithium battery negative electrode materials, which has the following advantages: 1. This device innovatively integrates magnetic adsorption and high-temperature demagnetization, solving the technical pain points of existing equipment that can only adsorb large-particle magnetic impurities or only eliminate residual magnetism. On the one hand, a stable magnetic field is generated by the magnetic rods evenly distributed on the inner wall of the demagnetizing furnace. During the rotation of the demagnetizing furnace, micro-nano-scale weak magnetic impurities (such as iron, nickel, cobalt, etc.) in the powder can be efficiently adsorbed, and the adsorption efficiency is improved compared with traditional single magnetic separation equipment. On the other hand, the electric heating rod built into the demagnetizing furnace, together with the heat insulation plate design, can achieve precise temperature control in a closed space (the temperature control range can be adapted to the demagnetization requirements of different negative electrode materials), completely eliminating residual magnetism in the powder, while avoiding interference of high temperature on the magnetic field of the magnetic rod, ensuring that the dual demagnetization effect does not affect each other, ultimately reducing the magnetic impurity content of the negative electrode material and significantly improving the energy density and cycle life of the lithium battery.

[0014] 2. To address the issue of secondary contamination of powder due to the disconnect between magnetic separation and high-temperature treatment in existing equipment, this device achieves one-stop demagnetization through structural integration. The material box of the feeding structure is sealed to the outer wall of the demagnetizing furnace, allowing the powder to directly contact the demagnetizing furnace for magnetic adsorption without the need for transfer. During high-temperature demagnetization, the feeding seat precisely aligns with the demagnetizing furnace mounting slot via the first electric push rod, ensuring that the powder enters the furnace in a sealed manner and avoiding the adsorption of environmental magnetic particles during contact with air. After treatment, the powder is directly pushed to the collection box via a push plate, eliminating any exposed transfer links throughout the process, reducing the secondary contamination rate to zero, and ensuring the stability of the purity of the negative electrode material.

[0015] 3. An innovative multi-dimensional powder disturbance mechanism is designed to solve the problem of uneven demagnetization caused by localized powder accumulation and missed contact in traditional equipment. First, the second hydraulic cylinder in the feeding structure can drive the material box to rotate around the drive shaft, and in conjunction with the inclined wall of the discharge plate, it realizes dynamic flow of powder. Second, the third slide rail drives the flip plate to move back and forth along the displacement groove, and the second motor can adjust the tilt angle of the flip plate to perform three-dimensional agitation of the powder. Third, the demagnetizing furnace rotates continuously with the drive structure, forming full contact with the dynamically flowing powder, and the contact area is increased compared with static contact. Under the synergistic effect of multiple mechanisms, the uniformity of powder demagnetization is improved, avoiding differences in battery performance caused by local impurities, while improving the processing efficiency of a single batch to meet the needs of industrial mass production.

[0016] 4. The various structural modules of the device are highly flexible and can quickly switch working modes according to different demagnetization process requirements. The material collection component uses a cross-shaped adjustment structure of the first and second slide rails, along with pulleys, to move the collection box forward, backward, left, and right. It can collect the magnetically adsorbed powder below the material box, and also collect the powder after high-temperature demagnetization at the discharge end of the demagnetizing furnace. The collection box can be quickly disassembled and replaced through a quick-locking structure of locking rod and spring, reducing material replacement waiting time. The demagnetizing furnace adopts a detachable snap-fit ​​design, which facilitates the later maintenance and replacement of magnetic rods and heating rods, reducing equipment operation and maintenance costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the assembly structure of the present invention; Figure 2 This is a schematic diagram of the main structure of the present invention broken down; Figure 3 This is a diagram illustrating the spring in the receiving assembly of the present invention; Figure 4 This is a schematic diagram of the split structure of the driving structure of the present invention; Figure 5 This is a diagram illustrating the driving structure of the present invention; Figure 6 This is a schematic diagram of the demagnetization structure of the present invention. Figure 7 This is a schematic diagram of the assembly structure of the demagnetizing structure of the present invention; Figure 8 This is a schematic diagram of the disassembled material feeding structure of the present invention.

[0018] In the diagram: 1. Main structure; 11. Base; 12. Shaft frame; 13. Bearing; 14. Controller; 15. First motor; 16. Arm; 17. Scraper seat; 18. Collecting assembly; 181. First slide rail; 182. Second slide rail; 183. First pulley; 184. Socket; 185. Collection box; 186. Second pulley; 187. Lock seat; 188. Locking rod; 189. Spring; 2. Drive structure; 21. Drive shaft; 22. Sealing plate; 23. First hydraulic cylinder; 24. Push plate; 25. Belt 26. Wheel, Belt, 3. Demagnetizing structure, 31. Demagnetizing furnace, 32. Heat insulation plate, 33. Heating rod, 34. Magnetic rod, 35. First electric push rod, 36. Push arm, 37. Feed seat, 4. Discharge structure, 41. Box seat, 42. Material box, 43. Connecting arm, 44. Discharge plate, 45. Second electric push rod, 46. Second hydraulic cylinder, 47. Third slide rail, 48. Stop bar, 49. Second motor, 50. Flip plate, 6. Insertion hole, 7. Scraper, 8. Mounting groove, 9. Discharge port, 10. Displacement groove. Detailed Implementation

[0019] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0020] like Figures 1-8 As shown, the present invention provides a technical solution: a demagnetizing device for powdered lithium battery negative electrode material, comprising a main structure 1, a driving structure 2, a demagnetizing structure 3, and a feeding structure 4; the driving structure 2 is movably disposed on the main structure 1 and is rotatable, the demagnetizing structure 3 is fixedly disposed on the driving structure 2, and the feeding structure 4 is fixedly disposed on the main structure 1, located to the right of the demagnetizing structure 3, and in contact with the demagnetizing structure 3; wherein, the main structure 1 is used to support and collect the processed powder, the driving structure 2 can drive the demagnetizing structure 3 to rotate, and the rotation of the demagnetizing structure 3 brings the powder in the feeding structure 4 into contact, and drives the magnetic impurities to rotate and move out of the feeding structure 4, thereby achieving the demagnetizing effect, and through the roller-shaped structure of the demagnetizing structure 3, it can also cooperate with the feeding structure 4 to put the powder inside, and perform demagnetizing treatment at high temperature.

[0021] As a further embodiment of the present invention, the main structure 1 includes a base 11, a shaft frame 12, a pair of bearings 13, a controller 14, a first motor 15, an arm 16, a scraper seat 17, and a material collection assembly 18; the shaft frame 12 is L-shaped, with one end of the shaft frame 12 fixedly mounted on the upper left wall of the base 11 and close to the front side, the pair of bearings 13 symmetrically embedded in the shaft frame 12, the controller 14 fixedly mounted on the front side wall of one end of the shaft frame 12, and the first motor 15 fixedly mounted on the shaft frame 12, with the drive end of the first motor 15 fixedly penetrating through the middle of one of the bearings 13. One end of the arm 16 is fixedly mounted on the other end of the shaft frame 12, and the arm 16 is located between two bearings 13. The scraper seat 17 is fixedly mounted on the other end of the arm 16, and the lower inner wall of the scraper seat 17 is an inclined wall. The material collection assembly 18 is fixedly mounted on the upper wall of the base 11 and located below the other end of the shaft frame 12. Supported by the shaft frame 12, the drive structure 2 is driven to rotate by the bearing 13 through the control and operation equipment, the scraper seat 17 is supported by the arm 16 to fit with the demagnetizing structure 3 to scrape, and the material collection assembly 18 realizes material collection in multiple scenarios.

[0022] More specifically, the main structure 1 provides stable support for the device, automated control, magnetic impurity scraping, and multi-scenario material collection, providing a reliable foundation for the coordinated operation of the subsequent drive structure 2, demagnetization structure 3, and feeding structure 4, effectively ensuring the stability and efficiency of the demagnetization process of powdered lithium battery anode materials.

[0023] As a further embodiment of the present invention, the receiving assembly 18 includes a first slide rail 181, a second slide rail 182, a first pulley 183, a socket 184, a collection box 185, two pairs of second pulleys 186, a lock seat 187, a lock rod 188, and a spring 189. The first slide rail 181 is fixedly mounted on the upper front wall of the base 11, and the first slide rail 181 is parallel to the other end of the shaft frame 12. One end of the second slide rail 182 is fixedly mounted on the first slide rail 181, and the second slide rail 182 moves left and right through the first slide rail 181. The first pulley 183 is fixedly mounted in the middle of the lower wall of the second slide rail 182, and the first pulley 183 rotates in contact with the base 11. One end of the socket 184 is fixedly mounted on the second slide rail 182, and the socket 184 moves back and forth through the second slide rail 182. The other end of the socket 184 is provided with a socket 6 in the middle. The collection box 185 is movably mounted on the upper wall of the base 11. Two pairs of second pulleys 186 are fixedly mounted at the four corners of the lower wall of the collection box 185. The lock seat 187 is fixedly mounted on the left side wall of the collection box 185. One end of the locking rod 188 is movably embedded in the lock seat 187 and can move up and down along the lock seat 187. The spring 189 is fixedly mounted on the upper wall of one end of the locking rod 188 and is located inside the lock seat 187. The other end of the locking rod 188 can be inserted into the socket 6 of the socket 184. The collection box 185 is moved left and right by the first slide rail 181 and moved back and forth by the second slide rail 182. The locking rod 188 can be raised and lowered within the lock seat 187. With the help of the spring 189, the locking rod 188 is connected to the socket 184, thus enabling the collection box 185 to be separated from the second slide rail 182.

[0024] More specifically, when it is necessary to receive the magnetically adsorbed powder discharged from the material box 42, push the second slide rail 182 to move left and right along the first slide rail 181 until the collection box 185 is aligned with the bottom of the material box 42; then push the collection box 185 back and forth along the second slide rail 182 to fine-tune the collection position and ensure that the powder falls accurately into the collection box 185; when it is necessary to receive the high-temperature demagnetized powder discharged from the demagnetizing furnace 31, similarly adjust the first slide rail 181 and the second slide rail 182 so that the collection box 185 is aligned with the discharge end of the demagnetizing furnace 31, and the collection position can be switched without disassembling the equipment; when the collection box 185 After filling, pull up the top of the locking rod 188. The locking rod 188 compresses the spring 189 and moves upward along the slide groove of the lock seat 187 until the other end of the locking rod 188 disengages from the socket 6 of the socket 184. At this time, the collection box 185 can be pushed to move it off the base 11 with the help of the second pulley 186, completing the powder transfer. When replacing the empty collection box 185, push the collection box 185 to the side of the second slide rail 182, align the locking rod 188 with the socket 6, release the locking rod 188, and the spring 189 returns to its original position, pushing the locking rod 188 into the socket 6 to complete the fixing of the collection box 185, which significantly improves the material changing efficiency.

[0025] As a further embodiment of the present invention, the drive structure 2 includes a drive shaft 21, a sealing plate 22, a pair of first hydraulic cylinders 23, a push plate 24, a pair of pulleys 25, and a belt 26; one end of the drive shaft 21 is fixedly inserted through the middle of another bearing 13 and is located on the other end of the shaft bracket 12; the sealing plate 22 is fixedly disposed on the other end of the drive shaft 21 and is located on the rear side of the shaft bracket 12; one end of each of the pair of first hydraulic cylinders 23 is fixedly inserted through the sealing plate 22, and the first hydraulic cylinders 23 are symmetrically disposed on both sides of the drive shaft 21, with the pair of first hydraulic cylinders 23 respectively located on the rear side of the shaft bracket 12. The push plate 24 is fixedly disposed between the telescopic ends of a pair of first hydraulic cylinders 23, and the push plate 24 is provided with two pairs of semi-circular scraping holes 7 at equal intervals. A pair of pulleys 25 are respectively fixedly disposed on one end of the drive shaft 21 and the drive end of the first motor 15. The two ends of the belt 26 are respectively movably fitted onto the pulleys 25. The drive shaft 21 carries the sealing plate 22, and the sealing plate 22 is connected to the demagnetizing structure 3. The push plate 24 is moved by the first hydraulic cylinder 23 to achieve internal scraping. The pulleys 25 and the belt 26 are linked to achieve the rotation of the drive shaft 21 driven by the first motor 15.

[0026] More specifically, the first motor 15 is started, and the motor drive end drives the pulley 25 connected to it to rotate. Through the meshing transmission of the belt 26, the pulley 25 on the drive shaft 21 rotates synchronously, thereby causing the drive shaft 21 to rotate around the bearing 13. Since the sealing plate 22 is fixedly connected to the drive shaft 21 and the demagnetizing furnace 31 is fastened to the sealing plate 22, the drive shaft 21 can drive the demagnetizing furnace 31 to rotate synchronously (the speed can be adjusted by the controller 14, such as 5-15 r / min), providing power for the contact adsorption of the powder between the outer wall of the demagnetizing furnace 31 and the powder, thereby achieving efficient separation of magnetic impurities.

[0027] After the powder is demagnetized at high temperature in the demagnetizing furnace 31, a pair of first hydraulic cylinders 23 are activated to control the extension and retraction ends of the hydraulic cylinders to extend synchronously, driving the push plate 24 to move along the inner wall of the demagnetizing furnace 31 towards the discharge end. During the movement, the edge of the push plate 24 scrapes away the powder remaining on the inner wall of the demagnetizing furnace 31, while the scraper 7 avoids the heating rod 33 to prevent damage to the parts due to collision. When the push plate 24 moves to the discharge end of the demagnetizing furnace 31, the powder is completely pushed into the collection box 185 below to achieve powder discharge without residue. After discharge, the extension and retraction ends of the first hydraulic cylinders 23 are reset, driving the push plate 24 back to the initial position, ready for the next operation.

[0028] As a further embodiment of the present invention, the demagnetizing structure 3 includes a demagnetizing furnace 31, a heat insulation plate 32, two pairs of electric heating rods 33, several magnetic rods 34, a first electric push rod 35, a push arm 36, and a feeding seat 37. The demagnetizing furnace 31 is a tubular structure, with one end of the demagnetizing furnace 31 detachably fastened to the sealing plate 22, and the demagnetizing furnace 31 is fitted onto the push plate 24. An L-shaped mounting groove 8 is provided on one side wall of the demagnetizing furnace 31, and one end of the mounting groove 8 is connected to the inner wall of the demagnetizing furnace 31. The heat insulation plate 32 is fixedly laid on the inner wall of the demagnetizing furnace 31. The two pairs of electric heating rods 33 are respectively equidistantly arranged on the inner wall of the demagnetizing furnace 31, and the electric heating rods 33 fit with the scraping groove 7 of the push plate 24. Several magnetic rods 34 are respectively equidistantly inserted into the inner wall of the demagnetizing furnace 31, and the magnetic rods 34 are close to the outer wall of the demagnetizing furnace 31. The first electric push rod 35, the push arm 36, and the first electric push rod 37 are respectively equidistantly inserted into the inner wall of the demagnetizing furnace 31. Push rod 35 is fixedly installed in the other end of the mounting groove 8 on the side wall of demagnetizing furnace 31, and is staggered and symmetrically located above one end of mounting groove 8. Push arm 36 is fixedly installed at one end of the telescopic end of the first electric push rod 35. Feed seat 37 is fixedly installed at the other end of push arm 36, and feed seat 37 is movably inserted into one end of mounting groove 8 for sealing and blocking. By connecting demagnetizing furnace 31 with sealing plate 22, one end of demagnetizing furnace 31 is sealed. Heat insulation plate 32 isolates the heat of electric heating rod 33 to prevent it from affecting the magnetic field of magnetic rod 34. Magnetic field is generated on the outer wall of demagnetizing furnace 31 by magnetic rod 34, so that demagnetizing furnace 31 rotates and adsorbs magnetic impurities, which are scraped off by scraper seat 17 during rotation. Feed seat 37 is moved in mounting groove 8 by electric push rod to fit the powder into demagnetizing furnace 31.

[0029] More specifically, the first motor 15 is started, which drives the demagnetizing furnace 31 to rotate (5-15 r / min) through the drive structure 2. At this time, the magnetic rod 34 forms a uniform magnetic field on the outer wall of the demagnetizing furnace 31. When the powder in the material box 42 comes into contact with the outer wall of the demagnetizing furnace 31, the magnetic impurities in the powder (such as iron, nickel and cobalt particles) are adsorbed onto the outer wall of the demagnetizing furnace 31. As the demagnetizing furnace 31 continues to rotate, the area where the impurities are adsorbed moves to the position of the scraper 17. The inclined wall of the scraper 17 is in close contact with the outer wall of the demagnetizing furnace 31, scraping off the magnetic impurities. The scraped impurities fall into the preset collection container, completing the magnetic adsorption and impurity removal of the powder.

[0030] High-temperature demagnetization mode: The first electric push rod 35 is extended, and the push arm 36 drives the feed seat 37 to move along the horizontal section of the mounting groove 8, opening the feed port of the demagnetizing furnace 31; the powder in the material box 42 falls into the demagnetizing furnace 31 through the feed port. After the powder is fed, the first electric push rod 35 is reset, and the feed seat 37 is inserted back into the mounting groove 8 to seal the demagnetizing furnace 31; the controller 14 starts the electric heating rod 33 to raise the internal temperature of the demagnetizing furnace 31 to the preset demagnetization temperature (e.g., 200-300℃ for graphite materials), and maintains the constant temperature for 10-30 minutes (adjusted according to the amount of powder); at the same time, the demagnetizing furnace 31 can be kept rotating at a low speed (3-5 r / min) to ensure that the powder is heated evenly and completely eliminate residual magnetism; after demagnetization is completed, the electric heating rod 33 is turned off, and the first hydraulic cylinder 23 is started to drive the push plate 24 to move, pushing the powder in the demagnetizing furnace 31 to the collection box 185 below, completing the high-temperature demagnetization process.

[0031] As a further embodiment of the present invention, the feeding structure 4 includes a base 41, a material box 42, a pair of connecting arms 43, a discharge plate 44, a pair of second electric push rods 45, a pair of second hydraulic cylinders 46, a third slide rail 47, a stop bar 48, a second motor 49, and a flip plate 50; one end of the base 41 is movably mounted on the drive shaft 21, and one end of the base 41 is located between the first hydraulic cylinder 23 and the shaft frame 12. The base 41 is L-shaped, and the other end of the base 41 is located on the right side of the demagnetizing furnace 31. The material box 42 is fixedly mounted on the other end of the base 41, and a discharge port 9 is provided at the bottom of the left side wall of the material box 42. The discharge port 9 fits snugly against the right side wall of the demagnetizing furnace 31. A displacement groove 10 is provided through the right side wall of the material box 42. A pair of connecting arms 43 are symmetrically arranged on the right side wall of the material box 42 near the top. A discharge plate 44 is movably embedded in the bottom of the material box 42, and the upper wall of the discharge plate 44 is an inclined wall. One end of a pair of second electric push rods 45 is movably connected to the connecting arm 43, and the telescopic ends of the second electric push rods 45 are movably connected to the discharge plate 44. The telescopic movement of the second electric push rods 45 causes the discharge plate 44 to flip. One end of a pair of second hydraulic cylinders 46 is movably arranged on the upper right wall of the base 11, and the telescopic ends of the second hydraulic cylinders 46 are inclined and movably connected to the connecting arm 43. A third slide rail 47 is fixedly arranged on the base 11. The material bin 42 is located on the right side wall and above the displacement groove 10. A stop rod 48 is movably inserted into the displacement groove 10 and is fixedly connected to the third slide rail 47. The length of the stop rod 48 is greater than the displacement groove 10, and the stop rod 48 moves via the third slide rail 47. A second motor 49 is fixedly located in the middle of the stop rod 48, and the drive end of the second motor 49 movably passes through the stop rod 48. The drive end of the second motor 49 is located inside the material bin 42. One end of the flap 50 is fixedly mounted on the drive end of the second motor 49. Powder is loaded into the material bin 42 and, through the outlet 9, fits against the outer wall of the demagnetizing furnace 31, allowing the powder to contact the rotating demagnetizing furnace 31 and thus adsorb magnetic materials. Impurities are stirred and distributed by moving the flap 50 via the third slide rail 47, and by extending and retracting the second hydraulic cylinder 46 to rotate the material box 42 at a certain angle along the outer wall of the demagnetizing furnace 31 with the box base 41 movably sleeved on the drive shaft 21 as the fulcrum. This achieves coordinated stirring and material distribution, promoting full contact. The discharge plate 44 can be opened by the second electric push rod 45 to discharge the material from the lower wall of the material box 42. The flap 50 can tilt and move back and forth along the displacement groove 10. In order to ensure that the material is fully in contact with the outer wall of the demagnetizing furnace 31, the material box 42 is extended and retracted by the second hydraulic cylinder 46, and rotated at a certain angle along the outer wall of the demagnetizing furnace 31 with the support of the box base 41.

[0032] More specifically, the powder to be processed is put into the material box 42. The powder flows along the inclined wall of the discharge plate 44 to the discharge port 9 and contacts the outer wall of the rotating demagnetizing furnace 31. The second hydraulic cylinder 46 is activated to control its extension and retraction end to reciprocate, driving the material box 42 to rotate up and down around the drive shaft 21 along the outer wall of the demagnetizing furnace 31. Gravity promotes the dynamic flow of the powder and avoids local accumulation. At the same time, the third slide rail 47 is activated to drive the stop bar 48 to move back and forth along the displacement groove 10. At the same time, the second motor 49 is activated to adjust the flip plate 50 to the tilt angle (e.g., 30 degrees). During the movement of the flip plate 50, the powder is stirred and distributed to ensure that the powder evenly covers the outer wall of the demagnetizing furnace 31 and improves the magnetic adsorption efficiency. After the magnetic adsorption is completed, the second electric push rod 45 is activated to extend, driving the discharge plate 44 to flip down and open the bottom of the material box 42, so that the pure powder is discharged into the collection box 185 below.

[0033] When the mounting slot 8 of the demagnetizing furnace 31 rotates to align with the discharge port 9 of the material box 42, the rotation of the demagnetizing furnace 31 is stopped; the second hydraulic cylinder 46 is activated to adjust the material box 42 to a horizontal position so that the discharge port 9 is precisely aligned with the mounting slot 8; the third slide rail 47 is activated to move the flip plate 50, and the tilt angle of the flip plate 50 is adjusted (e.g., 45 degrees) to push the powder in the material box 42 through the discharge port 9 and the mounting slot 8 into the demagnetizing furnace 31; after the feeding is completed, the second electric push rod 45 is controlled to retract, which drives the discharge plate 44 to close the bottom of the material box 42, waiting for the next feeding.

[0034] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0035] The equipment is placed horizontally on the ground via the base 11 in the main structure 1. The powder to be processed can be put into the material box 42 in the feeding structure 4. Since the discharge port 9 of the material box 42 is in contact with the side wall of the demagnetizing furnace 31 in the demagnetizing structure 3, the powder will be concentrated on the discharge plate 44 at the bottom of the material box 42 and will fully contact the side wall of the demagnetizing furnace 31 with the help of the inclined discharge plate 44. At the same time, the second hydraulic cylinder 46 can be activated to extend and retract. Through the movable connection between the second hydraulic cylinder 46 and the connecting arm 43, the material box 42 is driven to rotate around the drive shaft 21 with the box seat 41 movably sleeved on the drive shaft 21 as the support point, thereby realizing the up and down swinging of the powder. The third slide rail 47 can also be activated to drive the stop bar 48 to move in the displacement groove 10, thereby driving the inclined flip plate 50 to flip the powder, promoting the powder to fully contact the side wall of the demagnetizing furnace 31. In addition, the tilting direction of the baffle is adjusted by the second motor 49 during the back and forth movement of the stop bar 48. During the demagnetization process, the controller 14 starts the first motor 15, which, with the support of the bearing 13 and the transmission of the pulley 25 and belt 26, drives the drive shaft 21 to rotate on the shaft frame 12. This, in turn, drives the demagnetizing structure 3, which is connected to the drive structure 2, to rotate. That is, the demagnetizing furnace 31 rotates in the opposite direction. When the side wall comes into contact with the powder, the magnetic field generated by the internal magnetic rod 34 is used to attract the magnetic impurities. The impurities are then attracted to the side wall of the demagnetizing furnace 31. As the furnace rotates, the impurities come into contact with the scraper 17 on the arm 16 and are scraped off by the scraper 17. The scraped impurities fall into the collection box 185 below or are collected separately. The position of the collection box 185 can be adjusted according to the actual demagnetization scenario. That is, when the demagnetization is performed by adsorption through the side wall of the demagnetizing furnace 31, the second slide rail 182 can be driven by the first slide rail 181 in the material receiving assembly 18 to move left and right with the first pulley 183 and the collection box 185 can be driven by the second pulley 186. At the same time, the collection box 185 can be moved back and forth with the second slide rail 182 to adjust the position of the collection box 185 below the material box 42. After the material box 42 has been demagnetized by adsorption, the second electric push rod 45 can be activated to retract, which will drive the discharge plate 44 to flip down and open the bottom of the material box 42, so that the powder can be put into the collection box 185. The adjustment of the first slide rail 181 and the second slide rail 182 can also position the collection box 185 below the other end of the demagnetizing furnace 31. When heating and demagnetizing treatment is required, the first motor 15 can drive the demagnetizing furnace 31 to rotate, so that one end of the mounting groove 8 is opposite to the discharge port 9 of the material box 42, thereby activating the extension of the first electric push rod 35. With the help of the push arm 36, the feeding seat 37 moves and opens in the mounting groove 8, and then the powder in the material box 42 is put into the end of the demagnetizing furnace 31 near the sealing plate 22. After the feed seat 37 is closed, the internal heating rod 33 can be activated to heat the material. The heat insulation plate 32 prevents heat loss and avoids affecting the external magnetic rod 34. During the heating process, the demagnetizing furnace 31 can also be rotated. The heating rod 33 and the rotating agitator distribute the material. After reheating and demagnetizing, the first hydraulic cylinder 23 on the sealing plate 22 is activated to extend. The push plate 24 with scraper 7 that fits with the heating rod 33 moves inside the demagnetizing furnace 31 to push out the powder and collect it in the collection box 185. The collection box 185 can be released from the second slide rail 182 by pulling up the locking rod 188, causing the locking rod 188 to rise in the lock seat 187 and compress the spring 189.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A demagnetizing device for powdered lithium battery negative electrode material, characterized in that, It includes a main structure (1), a driving structure (2), a demagnetizing structure (3), and a feeding structure (4); the driving structure (2) is movably disposed on the main structure (1) and the driving structure (2) is rotatable; the demagnetizing structure (3) is fixedly disposed on the driving structure (2); the feeding structure (4) is fixedly disposed on the main structure (1); the feeding structure (4) is located to the right of the demagnetizing structure (3) and the feeding structure (4) is in contact with the demagnetizing structure (3); The main structure (1) is used to support and collect the processed powder. The driving structure (2) can drive the demagnetizing structure (3) to rotate. The rotation of the demagnetizing structure (3) will bring the powder in the feeding structure (4) into contact and drive the magnetic impurities to rotate and move out of the feeding structure (4), thereby achieving the demagnetizing effect. Furthermore, through the roller-shaped structure of the demagnetizing structure (3), it can also cooperate with the feeding structure (4) to put the powder inside and perform demagnetizing treatment at high temperature.

2. The demagnetizing device for powdered lithium battery negative electrode material according to claim 1, characterized in that, The main structure (1) includes a base (11), a shaft frame (12), a pair of bearings (13), a controller (14), a first motor (15), an arm (16), a scraper seat (17), and a material collection assembly (18). The shaft frame (12) is L-shaped. One end of the shaft frame (12) is fixedly installed on the upper left wall of the base (11) and close to the front side. A pair of bearings (13) are symmetrically embedded in the shaft frame (12). The controller (14) is fixedly installed on the front side wall of one end of the shaft frame (12). The first motor (15) is fixedly installed on the shaft frame (12), and the driving end of the first motor (15) is fixedly installed through the middle of one of the bearings (13). One end of the arm (16) is fixedly installed on the other end of the shaft frame (12), and the arm (16) is located between the two bearings (13). The scraper seat (17) is fixedly installed on the other end of the arm (16). The lower inner wall of the scraper seat (17) is an inclined wall. The material receiving assembly (18) is fixedly installed on the upper wall of the base (11) and located below the other end of the shaft frame (12).

3. The demagnetizing device for powdered lithium battery negative electrode material according to claim 2, characterized in that, The receiving assembly (18) includes a first slide rail (181), a second slide rail (182), a first pulley (183), a socket (184), a collection box (185), two pairs of second pulleys (186), a lock seat (187), a lock rod (188), and a spring (189). The first slide rail (181) is fixedly mounted on the upper front wall of the base (11), and the first slide rail (181) is parallel to the other end of the shaft frame (12). One end of the second slide rail (182) is fixedly mounted on the first slide rail (181), and the second slide rail (182) moves left and right through the first slide rail (181). The first pulley (183) is fixedly mounted in the middle of the lower wall of the second slide rail (182), and the first pulley (183) rotates in contact with the base (11). One end of the socket (184) is fixedly mounted on the second slide rail (182), and the socket (184) moves back and forth through the second slide rail (182). The other end of the socket (184) A socket (6) is provided in the middle. The collection box (185) is movably disposed on the upper wall of the base (11). Two pairs of second pulleys (186) are fixedly disposed at the four corners of the lower wall of the collection box (185). The lock seat (187) is fixedly disposed on the left side wall of the collection box (185). One end of the lock rod (188) is movably embedded in the lock seat (187), and one end of the lock rod (188) can move up and down along the lock seat (187). The spring (189) is fixedly disposed on the upper wall of one end of the lock rod (188), and the spring (189) is located in the lock seat (187). The other end of the lock rod (188) can be inserted into the socket (6) of the socket (184).

4. The demagnetizing device for powdered lithium battery negative electrode material according to claim 3, characterized in that, The drive structure (2) includes a drive shaft (21), a sealing plate (22), a pair of first hydraulic cylinders (23), a push plate (24), a pair of pulleys (25), and a belt (26); One end of the drive shaft (21) is fixedly inserted through the middle of another bearing (13) and located on the other end of the shaft frame (12). The sealing plate (22) is fixedly installed on the other end of the drive shaft (21) and located on the rear side of the shaft frame (12). One end of a pair of first hydraulic cylinders (23) is fixedly inserted through the sealing plate (22), and the first hydraulic cylinders (23) are symmetrically arranged on both sides of the drive shaft (21). The pair of first hydraulic cylinders (23) are located on the rear side of the shaft frame (12). The push plate (24) is fixedly installed between the telescopic ends of the pair of first hydraulic cylinders (23), and the push plate (24) is equidistantly provided with two pairs of semi-circular scraping holes (7). A pair of pulleys (25) are fixedly installed on one end of the drive shaft (21) and the drive end of the first motor (15), and the two ends of the belt (26) are movably fitted onto the pulleys (25).

5. The demagnetizing device for powdered lithium battery negative electrode material according to claim 4, characterized in that, The demagnetizing structure (3) includes a demagnetizing furnace (31), a heat insulation plate (32), two pairs of electric heating rods (33), several magnetic rods (34), a first electric push rod (35), a push arm (36), and a feeding seat (37); The demagnetizing furnace (31) has a tubular structure. One end of the demagnetizing furnace (31) is detachably fastened to the sealing plate (22), and the demagnetizing furnace (31) is fitted onto the push plate (24). An L-shaped mounting groove (8) is provided on one side wall of the demagnetizing furnace (31), and one end of the mounting groove (8) is connected to the inner wall of the demagnetizing furnace (31). The heat insulation plate (32) is fixedly laid on the inner wall of the demagnetizing furnace (31). Two pairs of heating rods (33) are equidistantly arranged on the inner wall of the demagnetizing furnace (31), and the heating rods (33) fit into the scraping edge (7) of the push plate (24). The magnetic rods (34) are inserted at equal intervals into the inner wall of the demagnetizing furnace (31), and the magnetic rods (34) are close to the outer wall of the demagnetizing furnace (31). The first electric push rod (35) is fixedly installed in the other end of the mounting groove (8) on the side wall of the demagnetizing furnace (31), and is located above one end of the mounting groove (8) in an alternating symmetrical manner. One end of the push arm (36) is fixedly installed on the telescopic end of the first electric push rod (35). The feed seat (37) is fixedly installed on the other end of the push arm (36), and the feed seat (37) is movably inserted into one end of the mounting groove (8) for sealing and blocking.

6. The demagnetizing device for powdered lithium battery negative electrode material according to claim 5, characterized in that, The feeding structure (4) includes a box base (41), a material box (42), a pair of connecting arms (43), a discharge plate (44), a pair of second electric push rods (45), a pair of second hydraulic cylinders (46), a third slide rail (47), a stop bar (48), a second motor (49), and a flip plate (50). One end of the housing (41) is movably mounted on the drive shaft (21), and one end of the housing (41) is located between the first hydraulic cylinder (23) and the shaft frame (12). The housing (41) is L-shaped, and the other end of the housing (41) is located on the right side of the demagnetizing furnace (31). The material box (42) is fixedly mounted on the other end of the housing (41), and a discharge port (9) is provided at the bottom of the left side wall of the material box (42). The discharge port (9) fits snugly against the right side wall of the demagnetizing furnace (31). A displacement groove (10) is provided through the right side wall of the material box (42). A pair of connecting arms (43) are symmetrically arranged on the right side wall of the material box (42) and close to the top. The discharge plate (44) is movably embedded in the bottom of the material box (42), and the upper wall of the discharge plate (44) is an inclined wall. One end of a pair of second electric push rods (45) is movably connected to the connecting arm (43), and the second electric push rods (45) The telescopic ends are respectively movably connected to the discharge plate (44). The second electric push rod (45) telescopically drives the discharge plate (44) to flip. One end of a pair of second hydraulic cylinders (46) is respectively movably set on the upper right wall of the base (11), and the telescopic ends of the second hydraulic cylinders (46) are respectively inclined and movably connected to the connecting arm (43). The third slide rail (47) is fixedly set on the right side wall of the material box (42) and located above the displacement groove (10). The stop rod (48) is movably inserted into the displacement groove (10), and the stop rod (48) is fixedly connected to the third slide rail (47). The second motor (49) is fixedly set in the middle of the stop rod (48), and the driving end of the second motor (49) movably passes through the stop rod (48). The driving end of the second motor (49) is located in the material box (42). One end of the flip plate (50) is fixedly set on the driving end of the second motor (49).

7. The demagnetizing device for powdered lithium battery negative electrode material according to claim 6, characterized in that, The length of the stop bar (48) is greater than that of the displacement groove (10), and the stop bar (48) moves via the third slide rail (47).

8. The demagnetizing device for powdered lithium battery negative electrode material according to claim 7, characterized in that, The flap (50) can tilt and move back and forth along the displacement groove (10).

9. A demagnetizing device for powdered lithium battery negative electrode material according to claim 8, characterized in that, The material box (42) extends and retracts through the second hydraulic cylinder (46), and with the support of the box base (41), it rotates and fits against the outer wall of the demagnetizing furnace (31) at a certain angle around the drive shaft (21).

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