Preparation method and preparation equipment of battery positive electrode material

Abstract

The invention relates to the technical field of battery positive electrode material preparation, and discloses a battery positive electrode material preparation method and preparation equipment thereof.The battery positive electrode material preparation equipment comprises a feeding opening formed in the top of a machine shell, material collecting boxes are arranged at the bottom end of the machine shell, and the material collecting boxes are arranged on the two sides of the machine shell; screening wheels used for removing iron from materials are rotationally installed in the machine shell, a driving motor is installed on the outer side of the machine shell and drives the screening wheels to rotate, the two screening wheels are symmetrically arranged and are in transmission connection through a gear, and a plurality of material containing grooves are formed in the curved surface of each screening wheel in a circumferential array mode; an electromagnetic plate used for attracting a magnet is rotationally installed in each containing groove, and a limiting column used for electrifying and limiting the electromagnetic plates is installed on the screening wheel. When the limiting column is attached to the electromagnetic plate in an inserted mode, the electromagnetic plate is powered on to adsorb iron, when the limiting column is separated from the electromagnetic plate, the electromagnetic plate loses magnetic attraction, and according to the scheme, equipment does not need to be stopped for cleaning, and the iron removal efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of battery cathode material preparation technology, specifically to a method and equipment for preparing battery cathode materials. Background Technology

[0002] The preparation of battery cathode materials typically involves multiple processes, including feeding, mixing, filling, sintering, crushing, iron removal, and packaging. The iron removal process is crucial for removing iron particles from the crushed material, ensuring its purity and performance. Since the crushing process requires grading, particles of different sizes must be sieved before iron removal.

[0003] Existing battery cathode materials mostly rely on electromagnets to separate iron filings or powder during iron removal. A current patent (CN207119532U) discloses a graphite powder iron removal machine for battery materials, comprising a demagnetizing device and a cleaning device. The demagnetizing device includes an inlet, a motor, a conveyor, a support shaft, an electromagnetic mesh, a vibrator, an electromagnetic coil, a control box, a heating plate, a ceramic surface, an outlet, a fastener, an inclined plate, and a support frame. The inlet is fixed to the upper left position of the demagnetizing device. The motor is fixed to the lower left of the feed inlet; the conveyor is vertically fixed to the center of the right side of the motor; the support shaft is fixed to the lower left of the motor; the electromagnetic mesh is fixed to the lower right of the feed inlet, inside the demagnetizing device; the raw material of this invention enters through the feed inlet; the raw material is transported by the conveyor to the top of the electromagnetic mesh; the vibrator causes the electromagnetic mesh to vibrate; the electromagnetic coil is energized to generate magnetism, making the electromagnetic mesh magnetic, demagnetizing the raw material above the electromagnetic mesh, the magnetic material is attracted to the electromagnetic mesh, and qualified raw material falls below through the mesh.

[0004] While the existing technology effectively separates iron filings and iron powder, when too much material is adsorbed on the electromagnetic grid, the equipment needs to be stopped and the grid cleaned to remove the collected iron filings and iron powder. This process is time-consuming, labor-intensive, and delays production, reducing the efficiency of battery cathode material preparation. Therefore, it does not meet the current requirements. To address this, we propose a method and equipment for preparing battery cathode materials. Summary of the Invention

[0005] This invention provides a method and equipment for preparing battery cathode materials. It features automatic transfer of separated iron powder and iron filings without requiring cleaning, thus improving preparation efficiency. This addresses the problem mentioned in the background section where existing technologies, while effectively separating iron filings and powder, require stopping the equipment and cleaning the electromagnetic grid when excessive material is adsorbed, resulting in time-consuming, labor-intensive, and production-delaying processes that reduce the efficiency of battery cathode material preparation.

[0006] This invention provides the following technical solution: a method for preparing a battery cathode material, comprising the following specific steps: S1. Feeding: Prepare and mix the required raw materials in proportion to prepare the chemical substances needed in the preparation process; S2. Blending: Thoroughly mix the raw materials to ensure uniform composition and eliminate any possible particle aggregation; S3. Loading: The mixed raw materials are loaded into a specific container in preparation for subsequent sintering; S4. Sintering: The container containing the mixed raw materials is placed in a high-temperature furnace for sintering. S5. Crushing: Crushing the sintered material blocks to make them into the required particle size; S6. Iron removal: The crushed material is placed into the machine casing and screened according to particle size. The screening wheel is used to remove iron particles from the material by removing the same particle size.

[0007] As an optional scheme of the battery cathode material preparation method of the present invention, in step S6, the screened material and iron particles are collected in a material collection box and an iron collection box respectively, and the boxes are manually opened and removed after the iron removal process is completed.

[0008] This solution also proposes a battery cathode material preparation device, including a feed inlet installed on the top of the casing, a material collection box located at the bottom of the casing, and material collection boxes located on both sides of the casing. Inside the casing, a screening wheel for removing iron from the material is rotatably installed. A drive motor is installed on the outside of the casing, and the drive motor drives the screening wheel to rotate. Two screening wheels are symmetrically arranged and connected by gear transmission. Multiple material troughs are opened on the curved circumferential array of the screening wheel. An electromagnetic plate for attracting magnets is rotatably installed in each material trough. A limiting post for energizing and limiting the electromagnetic plate is installed on the screening wheel. When the limiting post is inserted into and attached to the electromagnetic plate, the electromagnetic plate is energized and attracts iron particles. When the limiting post is separated from the electromagnetic plate, the electromagnetic plate loses its magnetic attraction.

[0009] As an optional embodiment of the battery cathode material preparation equipment described in this invention, the electromagnetic plate is configured as an electromagnet plate, a drive shaft is coaxially inserted into the fixed end of the electromagnetic plate, a compression gear is installed at one end of the drive shaft, a spiral spring is connected to the other end of the drive shaft, the outer end of the spiral spring is connected to the electromagnetic plate, a track disk is fixedly installed on the inner wall of the housing, the track disk is coaxially corresponding to the screening wheel, a compression rack is installed on the side wall of the track disk, and the compression gear and the compression rack mesh intermittently.

[0010] As an optional embodiment of the battery cathode material preparation equipment described in this invention, the screening wheel is arranged in a functional circumference with a material screening area, a restriction area, and an iron screening area. The material screening area corresponds to the falling area of ​​the battery cathode raw material, and the restriction area and the iron screening area correspond to the discharge area of ​​iron in the raw material. The compression rack is coaxially arranged with the trajectory disk, and the length of the compression rack starts from the middle of the material screening area and ends at the end of the restriction area. The restriction column restricts the electromagnetic plate in accordance with the material screening area.

[0011] As an alternative solution for the battery cathode material preparation equipment described in this invention, the electromagnetic plate is clearance-fitted with the drive shaft, a support bearing is installed on the outer side of the drive shaft, the outer ring of the support bearing is in contact with the electromagnetic plate, and a plurality of shaking springs are installed at the bottom of the material holding tank to enhance the swing intensity of the electromagnetic plate during its movement.

[0012] As an optional embodiment of the battery cathode material preparation equipment described in this invention, the inner wall of the trajectory disk is provided with a trajectory groove, the side of the electromagnetic plate is provided with a limiting groove, one end of the limiting post passes through the screening wheel, the end of the limiting post is inserted into the limiting groove, the other end of the limiting post is connected to a connecting rod, the end of the connecting rod is connected to a sliding rod, the end of the sliding rod is slidably inserted into the trajectory groove, the trajectory groove is configured as an annular groove with two groove depths, an additional plate is installed on the side of the housing, the trajectory groove extends to the inner wall of the additional plate, when the sliding rod slides to the shallow part of the trajectory groove, the limiting post is inserted and fitted into the limiting groove, when the sliding rod slides to the deep part of the trajectory groove, the limiting post is separated from the limiting groove.

[0013] As an optional embodiment of the battery cathode material preparation equipment described in this invention, the limiting groove is configured as a horn-shaped slot, a first contact piece is installed at the bottom of the limiting groove, a second contact piece is installed at the end of the limiting post, the second contact piece is connected to a flexible wire, the flexible wire passes through the limiting post and connects to the outside, when the limiting post and the limiting groove are inserted and fitted together, the first contact piece and the second contact piece are fitted together, and the electromagnetic plate is energized.

[0014] As an optional solution for the battery cathode material preparation equipment described in this invention, the machine housing is equipped with a sieve plate for screening the size of material particles, and a cam is rotatably installed inside the machine housing that contacts the bottom of the sieve plate. A secondary screening box is installed on the side of the casing, and inclined baffles are installed on the edge of the screening plate to guide large particles.

[0015] As an optional embodiment of the battery cathode material preparation equipment described in this invention, the following features are provided: a plurality of filter holes are provided on the side of the screening plate; L-shaped connecting plates are fixedly installed on the upper sides of both ends of the screening plate; tension springs are installed on the upper sides of the L-shaped connecting plates; the upper ends of the tension springs are connected to the top wall of the housing; a material distribution plate and a sliding plate are installed on the inner wall of the housing; the material distribution plate is located directly below the screening plate; the sliding plates are symmetrically installed below the material distribution plate; and a baffle plate is installed inside the housing, located above the feed inlet.

[0016] The present invention has the following beneficial effects: 1. The method and equipment for preparing the positive electrode material of this battery, through the setting of a screening wheel and an electromagnetic plate, allows material mixed with iron particles to easily fall into the collection trough when it falls onto the rotating screening wheel. Since the electromagnetic plate is energized at this time, the iron particles in the material will be adsorbed onto the electromagnetic plate and change position with the rotation of the screening wheel. The qualified raw material in the collection trough changes its holding angle with the rotation of the screening wheel, thus tilting into the material collection box for collection. The iron particles on the electromagnetic plate are then separated from the qualified material until the electromagnetic plate is de-energized and loses its power. The magnetic attraction function allows iron particles to be deposited into the iron collection box, achieving iron removal. In this solution, the iron particles are first locked by an electromagnet. During the rotation of the screening wheel, qualified raw materials and iron particles are fed into different positions, thus automatically achieving iron removal. Compared with existing technologies, the equipment in this solution can automatically collect the adsorbed iron particles and then move in a circular motion after releasing the iron particles, repeatedly completing the iron removal work without stopping the equipment for cleaning. This improves the efficiency of iron removal and reduces the cost of preparing battery cathode materials.

[0017] 2. The method and equipment for preparing the positive electrode material of this battery utilize the cooperation between the limiting column and the trajectory chute. During the rotation of the screening wheel, the limiting column automatically extends and retracts relative to the electromagnetic plate. Through the cooperation between the limiting column and the electromagnetic plate, when the compression gear meshes with the compression rack, the compression gear drives the drive shaft to rotate. Since the limiting column restricts the electromagnetic plate at this time, the electromagnetic plate remains stationary. Therefore, the drive shaft drives the spiral spring to rotate and compress until the limiting column leaves the electromagnetic plate. The electromagnetic plate, under the influence of the spiral spring, releases and springs outward, thereby expelling the iron particles that have lost their adsorption due to power failure, improving the discharge efficiency of the iron particles. The screening wheel continues to rotate. When the compression gear disengages from the compression rack, the electromagnetic plate changes from unidirectional oscillation to up-and-down oscillation. The vibration spring enhances the cleaning intensity, causing the electromagnetic plate to shake off iron particles, further improving the cleaning effect. By setting the limiting groove in a trumpet shape, the limiting post can be easily reinserted into the limiting groove, thus re-limiting the electromagnetic plate. In this design, the first and second contact plates of the electromagnetic plate are respectively located at the bottom of the limiting groove and the end of the limiting post. Therefore, when the limiting post restricts the electromagnetic plate, the electromagnetic plate is energized, improving the functionality of the limiting post. This achieves two goals at once, with a simple structure and good effect.

[0018] 3. The method and equipment for preparing the positive electrode material of this battery utilize the cooperation of a screening plate and a cam. When the cam rotates, it causes the screening plate to impact, thereby causing the screening plate to vibrate and screening particles of different sizes. Larger particles are guided to the secondary screening box by inclined blocks to achieve multi-stage screening, while smaller particles fall directly onto the distribution plate below and are guided by a sliding plate to the top of the screening wheel, thus achieving material processing zoning. The contact between the material and the screening wheel initiates the iron removal process. Attached Figure Description

[0019] Figure 1 This is a three-dimensional cross-sectional view of the present invention.

[0020] Figure 2 This is a side view cross-sectional three-dimensional structural diagram of the present invention.

[0021] Figure 3 This is a schematic diagram of the internal three-dimensional exploded structure of the present invention.

[0022] Figure 4 This is a partial front view cross-sectional structural schematic diagram of the present invention.

[0023] Figure 5 This is a schematic diagram of the overall side cross-sectional structure of the present invention.

[0024] Figure 6 This is a schematic diagram of the overall front cross-sectional structure of the present invention.

[0025] Figure 7This is a schematic diagram of the cross-sectional structure of the screening wheel of the present invention.

[0026] Figure 8 This is an enlarged structural diagram of point A in the present invention.

[0027] Figure 9 This is a schematic diagram of the structure of the electromagnetic plate at point B when it is energized according to the present invention.

[0028] Figure 10 This is a schematic diagram of the structure of the electromagnetic plate at point B of the present invention when it is not connected to electricity.

[0029] In the diagram: 10. Material screening zone; 20. Restricted zone; 30. Iron screening zone; 110. Machine casing; 120. Feed inlet; 130. Iron collection box; 140. Secondary screening box; 150. Baffle plate; 160. Mounting plate; 170. Material collection box; 210. Screening plate; 211. Filter hole; 220. L-shaped connecting plate; 230. Tension spring; 240. Cam; 250. Inclined stop; 260. Distributing plate; 270. Slide plate; 310. Screen 320. Divider wheel; 330. Material trough; 340. Electromagnetic plate; 350. Drive shaft; 360. Spiral spring; 370. Compression gear; 380. Drive motor; 390. Support bearing; 410. Vibration spring; 420. Track disc; 430. Compression rack; 510. Track groove; 520. Limiting post; 530. Connecting rod; 540. Sliding rod; 610. First contact piece; 620. Second contact piece; 630. Flexible wire. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1 This embodiment aims to address the problem that while existing technologies effectively separate iron filings and powders, when excessive material is adsorbed on the electromagnetic grid, the equipment must be stopped and the grid cleaned to remove the collected iron filings and powders. This process is time-consuming, labor-intensive, and disruptive to production, reducing the efficiency of battery cathode material preparation. Please refer to [link to relevant documentation]. Figures 1-10A battery cathode material preparation device includes a feed inlet 120 installed on the top of a housing 110, a material collection box 170 disposed at the bottom of the housing 110, and material collection boxes 170 disposed on both sides of the housing 110. The device is characterized in that a screening wheel 310 for removing iron from the material is rotatably installed inside the housing 110, and a drive motor 370 is installed on the outside of the housing 110. The drive motor 370 drives the screening wheel 310 to rotate. Two screening wheels 310 are symmetrically arranged, and gears are installed at the ends of the rotating shafts of the two screening wheels 310. The two screening wheels 310 are connected by gear transmission, so the screening wheels 310 rotate towards the center of the housing 110 respectively, and the qualified raw materials falling on the screening wheels 310 eventually collect together and fall down.

[0032] The screening wheel 310 has multiple material collection slots 320 arranged in a curved circumferential array. Each material collection slot 320 contains a rotating electromagnetic plate 330 for attracting magnets. The edge of the electromagnetic plate 330 is fitted with an adhesive strip to ensure an interference fit with the wall of the material collection slot 320, minimizing the gap between the edge of the electromagnetic plate 330 and the material collection slot 320 when locked. The screening wheel 310 is equipped with limiting posts 510 for energizing and restricting the electromagnetic plate 330. When the limiting post 510 is inserted into and fitted with the electromagnetic plate 330, the electromagnetic plate 330 is energized and attracts iron. When the limiting post 510 is separated from the electromagnetic plate 330, the electromagnetic plate 330 loses its magnetic attraction.

[0033] Electromagnetic plate 330 is configured as an electromagnet plate. An electromagnet is a commonly used existing technology, a device that uses an electric current passing through a conductor to generate a magnetic field. Its working principle is based on Ampere's law and Faraday's law of electromagnetic induction. According to Faraday's law of electromagnetic induction, when a magnetic field passes through a conductor, an induced electromotive force is generated in the conductor. This means that in the coil of an electromagnet, when current is applied, not only is a constant magnetic field generated, but the coil itself also becomes an inductor. By controlling the magnitude and direction of the current, the electromagnet can attract or release objects. When current passes through the electromagnet, the generated magnetic field can attract ferromagnetic materials. When the current is disconnected, the magnetic field disappears, and the attractive force decreases or disappears, causing the object to be released. Currently, there are many electromagnet devices on the market, and their specific power supply methods and selectable device models are existing and clearly understood and achievable by those skilled in the art; therefore, they will not be elaborated upon in this embodiment.

[0034] See Figure 7A drive shaft 340 is coaxially inserted into the fixed end of the electromagnetic plate 330. A compression gear 360 is installed at one end of the drive shaft 340, and a spiral spring 350 is connected to the other end of the drive shaft 340. The outer end of the spiral spring 350 is connected to the electromagnetic plate 330. A track disk 410 is fixedly installed on the inner wall of the housing 110. The track disk 410 is coaxially corresponding to the screening wheel 310. A compression rack 420 is installed on the side wall of the track disk 410. The compression gear 360 and the compression rack 420 mesh intermittently.

[0035] In the specific setup, by using the screening wheel 310 and the electromagnetic plate 330, when material mixed with iron particles falls onto the rotating screening wheel 310, it will easily fall into the material collection trough 320. Since the electromagnetic plate 330 is energized at this time, the iron particles in the material will be attracted to the electromagnetic plate 330 and change position as the screening wheel 310 rotates. The qualified raw material in the material collection trough 320 changes the angle of its placement as the screening wheel 310 rotates, and thus it will be poured into the material collection box 170 for collection. At this time, the iron particles on the electromagnetic plate 330 are separated from the qualified material until the electromagnetic plate 330 is de-energized and loses its magnetic attraction function. At this time, the iron particles will be poured into the iron collection box 130, achieving the effect of iron removal.

[0036] In this embodiment, the iron is first locked by the action of an electromagnet. During the rotation of the screening wheel 310, qualified raw materials and iron are fed into different positions, thereby automatically achieving the iron removal effect. Compared with the prior art, the equipment of this solution can automatically collect the adsorbed iron particles and move in a circular motion after releasing the iron particles, repeating the iron removal work repeatedly without stopping the equipment for cleaning, thus improving the iron removal efficiency and reducing the cost of battery cathode material preparation.

[0037] Example 2 This embodiment aims to address the problem that when iron powder is magnetized, it retains its magnetism until it is disturbed by external forces or gradually loses its magnetism. Without external interference, the iron powder can retain its magnetism for a long time, causing some iron particles to adhere to the electromagnetic plate 330 and not fall due to gravity and inertia, thus limiting the cleaning effect of the electromagnetic plate 330. This embodiment is an improvement upon Embodiment 1; for details, please refer to [link to Embodiment 1]. Figures 1-9 The screening wheel 310 is arranged in a functional circumference with a material screening zone 10, a restriction zone 20, and an iron screening zone 30, as shown in the figure. Figure 4 and Figure 7The material screening zone 10 corresponds to the falling area of ​​the battery positive electrode raw material, the restriction zone 20 and the iron screening zone 30 correspond to the discharge area of ​​iron particles in the raw material, the compression rack 420 is coaxially arranged with the trajectory disk 410, and the length of the compression rack 420 starts from the middle of the material screening zone 10 and ends at the end of the restriction zone 20. The restriction column 510 restricts the electromagnetic plate 330 in accordance with the material screening zone 10.

[0038] The electromagnetic plate 330 is clearance-fitted with the drive shaft 340. A support bearing 380 is installed on the outer side of the drive shaft 340. The outer ring of the support bearing 380 is in contact with the electromagnetic plate 330. Multiple shaking springs 390 are installed at the bottom of the material trough 320 to enhance the swing intensity of the electromagnetic plate 330 when it moves.

[0039] See Figure 8 The inner wall of the track disk 410 is provided with a track groove 430, and the side of the electromagnetic plate 330 is provided with a limiting groove 540. One end of the limiting post 510 passes through the screening wheel 310, and the end of the limiting post 510 is inserted into the limiting groove 540. The other end of the limiting post 510 is connected to a connecting rod 520, and the end of the connecting rod 520 is connected to a sliding rod 530. The end of the sliding rod 530 is slidably engaged with the track groove 430. The track groove 430 is configured as an annular groove with two groove depths. The sliding rod 530 moves along the bottom of the track groove 430.

[0040] An auxiliary plate 160 is bolted to the side of the housing 110. A track groove 430 extends to the inner wall of the auxiliary plate 160. When the slide rod 530 slides to the shallow part of the track groove 430, the limiting post 510 engages with the limiting groove 540. When the slide rod 530 slides to the deep part of the track groove 430, the limiting post 510 separates from the limiting groove 540. Therefore, through the cooperation of the limiting post 510 and the track groove 430, the limiting post 510 automatically extends and retracts relative to the electromagnetic plate 330 when the screening wheel 310 rotates.

[0041] Through the cooperation of the limiting post 510 and the electromagnetic plate 330, when the compression gear 360 meshes with the compression rack 420, the compression gear 360 drives the drive shaft 340 to rotate. Since the limiting post 510 restricts the electromagnetic plate 330 at this time, the electromagnetic plate 330 remains fixed. Therefore, the drive shaft 340 drives the spiral spring 350 to rotate and compress until the limiting post 510 leaves the electromagnetic plate 330. The electromagnetic plate 330 is released by the spiral spring 350 and springs outward, thereby throwing out the iron particles that have lost their adsorption due to the power failure.

[0042] See Figure 9 and Figure 10The limiting slot 540 is configured as a horn-shaped slot. A first contact piece 610 is installed at the bottom of the limiting slot 540, and a second contact piece 620 is installed at the end of the limiting post 510. The second contact piece 620 is connected to a flexible wire 630, which passes through the limiting post 510 and connects to the outside. When the limiting post 510 and the limiting slot 540 are inserted and fitted together, the first contact piece 610 and the second contact piece 620 are in contact, and the electromagnetic plate 330 is energized. By configuring the limiting slot 540 as a horn shape, the limiting post 510 can be easily reinserted into the limiting slot 540, thereby re-limiting the electromagnetic plate 330.

[0043] Specifically, when the electromagnetic plate 330 is in the material screening zone 10, it is kept close to the shaking spring 390 due to the compression of the spiral spring 250. When it moves to the restriction zone 20, the restriction column 510 moves away from the electromagnetic plate 330 along the track groove 430, causing the electromagnetic plate 330 to swing outward due to the release of the spiral spring 250 while the power is off. However, the compression gear 360 continues to rotate in the direction of compression of the spiral spring 250 because it is still engaged with the compression rack 420. When the electromagnetic plate 330 moves to the iron screening zone 30, the compression gear 360 disengages from the compression rack 420. At this time, the continuous rotation will give the drive shaft 340 a downward force, causing the drive shaft 340 to restrain the spiral spring 350. The spiral spring 350 drives the electromagnetic plate 330 to swing downward. Therefore, the swing amplitude of the electromagnetic plate 330 is limited to avoid the electromagnetic plate 330 swinging outward at too large an angle and colliding with the side wall of the material trough 320.

[0044] When the electromagnetic plate 330 swings back, it contacts the shaking spring 390 and generates an impact, and then swings outward again, realizing the shaking of the electromagnetic plate 330. In this way, the residual iron particles on the electromagnetic plate 330 are shaken off, thereby enhancing the cleaning effect.

[0045] In this embodiment: when the compression gear 360 meshes with the compression rack 420, the compression gear 360 drives the drive shaft 340 to rotate, and the drive shaft 340 drives the spiral spring 350 to rotate and compress. The limiting column 510 leaves the electromagnetic plate 330, and the electromagnetic plate 330 is released and bounces outward under the influence of the spiral spring 350, thereby throwing out the iron particles that have lost their adsorption due to power failure. The screening wheel 310 continues to rotate, and the compression gear 360 leaves the compression rack 420. At this time, the electromagnetic plate 330 changes from unidirectional swing to up and down swing, and generates vibration through the action of the shaking spring 390, so that the electromagnetic plate 330 shakes off the iron particles on it, further improving the cleaning effect of iron particles. In this scheme, the first contact piece 610 and the second contact piece 620 of the electromagnetic plate 330 are respectively set at the bottom of the limiting groove 540 and the end of the limiting post 510. Therefore, when the limiting post 510 restricts the electromagnetic plate 330, the electromagnetic plate 330 is in an energized state, which improves the functionality of the limiting post 510. This achieves two goals at once, with a simple structure and good effect.

[0046] Example 3 This embodiment aims to facilitate the solution to the problem of requiring multi-stage screening of materials before iron removal. This embodiment is an improvement on Embodiment 1. For details, please refer to [link to Embodiment 1]. Figures 1-10 The casing 110 is equipped with a screening plate 210 for screening material particles by size. A cam 240 is rotatably installed inside the casing 110 and contacts the bottom of the screening plate 210. A secondary screening box 140 is installed on the side of the casing 110. An inclined baffle 250 is installed on the edge of the screening plate 210 to guide large particles.

[0047] In this embodiment, a servo motor for driving the cam 240 to rotate is installed on the outside of the housing 110.

[0048] See Figures 1-5 The screening plate 210 has several filter holes 211 on its side. L-shaped connecting plates 220 are fixedly installed on the upper side of both ends of the screening plate 210. Tension springs 230 are installed on the upper side of each L-shaped connecting plate 220. The upper end of the tension springs 230 is connected to the top wall of the housing 110. A material distribution plate 260 and a sliding plate 270 are installed on the inner wall of the housing 110. The material distribution plate 260 is located directly below the screening plate 210. The sliding plate 270 is symmetrically installed below the material distribution plate 260. A baffle plate 150 is installed inside the housing 110. The baffle plate 150 is located above the feed inlet 120.

[0049] In this embodiment: through the cooperation of the screening plate 210 and the cam 240, when the cam 240 rotates, it will cause the screening plate 210 to impact, thereby causing the screening plate 210 to vibrate and screen the particles of different sizes above. Larger particles are guided to the secondary screening box 140 by the inclined baffle 250 to achieve multi-stage screening, while smaller particles fall directly onto the distribution plate 260 below and are guided by the slide plate 270 to fall onto the top of the screening wheel 310, realizing material processing partitioning. When the material contacts the screening wheel 310, the iron removal process is started.

[0050] Example 4 A method for preparing a battery cathode material includes the following specific steps: S1. Feeding: Prepare and mix the required raw materials in proportion to prepare the chemical substances needed in the preparation process; S2. Blending: Thoroughly mix the raw materials to ensure uniform composition and eliminate any possible particle aggregation; S3. Loading: The mixed raw materials are loaded into a specific container in preparation for subsequent sintering; S4. Sintering: The container containing the mixed raw materials is placed in a high-temperature furnace for sintering. S5. Crushing: Crushing the sintered material blocks to make them into the required particle size; S6. Iron removal: The crushed material is placed into the casing 110 and screened according to particle size. The screening wheel 310 is used to remove iron particles from the material by removing the same particle size.

[0051] In S6, the screened material and iron particles are collected in the material collection box 170 and the iron collection box 130, respectively. After the iron removal process is completed, the box doors are opened manually to remove them, but the iron removal equipment does not need to be turned off.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for preparing a battery cathode material, characterized by, The specific steps include the following: S1. Feeding: Prepare and mix the required raw materials in proportion to prepare the chemical substances needed in the preparation process; S2. Blending: Thoroughly mix the raw materials to ensure uniform composition and eliminate any possible particle aggregation; S3. Loading: The mixed raw materials are loaded into a specific container in preparation for subsequent sintering; S4. Sintering: The container containing the mixed raw materials is placed in a high-temperature furnace for sintering. S5. Crushing: Crushing the sintered material blocks to make them into the required particle size; S6. Iron removal: The crushed material is placed into the casing (110) and screened according to particle size. The screening wheel (310) is used to remove iron particles from the material.

2. The method of claim 1, wherein: In step S6, the screened material and iron particles are collected in the material collection box (170) and the iron collection box (130) respectively, and the boxes are manually opened and removed after the iron removal process is completed.

3. A battery cathode material preparation device for implementing the battery cathode material preparation method of any one of claims 1-2, comprising a feeding port (120) installed on the top of the casing (110), a material collecting box (170) arranged at the bottom end of the casing (110), and the material collecting box (170) arranged on both sides of the casing (110), characterized in that, The screening wheel (310) for removing iron from materials is rotatably installed inside the housing (110). A drive motor (370) is installed on the outside of the housing (110). The drive motor (370) drives the screening wheel (310) to rotate. There are two screening wheels (310) symmetrically arranged. The two screening wheels (310) are connected by gear transmission. Multiple material troughs (320) are opened on the curved circumferential array of the screening wheel (310). An electromagnetic plate (330) for attracting magnets is rotatably installed in each material trough (320). A limiting post (510) for connecting and limiting the electromagnetic plate (330) is installed on the screening wheel (310). When the limiting post (510) is inserted into and attached to the electromagnetic plate (330), the electromagnetic plate (330) is energized and attracts iron particles. When the limiting post (510) is separated from the electromagnetic plate (330), the electromagnetic plate (330) loses its magnetic attraction.

4. The battery cathode material preparation equipment according to claim 3, characterized in that: The electromagnetic plate (330) is configured as an electromagnet plate. A drive shaft (340) is coaxially inserted into the fixed end of the electromagnetic plate (330). A compression gear (360) is installed at one end of the drive shaft (340), and a spiral spring (350) is connected to the other end of the drive shaft (340). The outer end of the spiral spring (350) is connected to the electromagnetic plate (330). A track disk (410) is fixedly installed on the inner wall of the housing (110). The track disk (410) is coaxially corresponding to the screening wheel (310). A compression rack (420) is installed on the side wall of the track disk (410). The compression gear (360) and the compression rack (420) mesh intermittently.

5. The battery cathode material preparation equipment according to claim 4, characterized in that: The screening wheel (310) is arranged in a functional circumference with a material screening area (10), a restriction area (20) and an iron screening area (30). The material screening area (10) corresponds to the falling area of ​​the battery positive electrode raw material. The restriction area (20) and the iron screening area (30) correspond to the discharge area of ​​iron particles in the raw material. The compression rack (420) is coaxially arranged with the trajectory disk (410). The length of the compression rack (420) starts from the middle of the material screening area (10) and ends at the end of the restriction area (20). The restriction column (510) restricts the electromagnetic plate (330) in accordance with the material screening area (10).

6. The battery cathode material preparation equipment according to claim 4, characterized in that: The electromagnetic plate (330) is clearance-fitted with the drive shaft (340). A support bearing (380) is installed on the outer side of the drive shaft (340). The outer ring of the support bearing (380) is in contact with the electromagnetic plate (330). A plurality of shaking springs (390) are installed at the bottom of the material trough (320) to enhance the swing intensity of the electromagnetic plate (330) when it moves.

7. The battery cathode material preparation apparatus according to claim 4, characterized in that: The inner wall of the track disk (410) is provided with a track groove (430), and the side of the electromagnetic plate (330) is provided with a limiting groove (540). One end of the limiting post (510) passes through the screening wheel (310), and the end of the limiting post (510) is inserted into the limiting groove (540). The other end of the limiting post (510) is connected to a connecting rod (520), and the end of the connecting rod (520) is connected to a sliding rod (530). The end of the sliding rod (530) is slidably inserted into the track groove (430). The track groove (430) is configured as an annular groove with two groove depths. An additional plate (160) is installed on the side of the housing (110). The track groove (430) is opened to the inner wall of the additional plate (160). When the slide rod (530) slides to the shallow part of the track groove (430), the limiting post (510) is inserted and fitted with the limiting groove (540). When the slide rod (530) slides to the deep part of the track groove (430), the limiting post (510) separates from the limiting groove (540).

8. The battery cathode material preparation apparatus according to claim 7, characterized in that: The limiting groove (540) is configured as a horn-shaped slot. A first contact piece (610) is installed at the bottom of the limiting groove (540). A second contact piece (620) is installed at the end of the limiting post (510). The second contact piece (620) is connected to a flexible wire (630). The flexible wire (630) passes through the limiting post (510) and connects to the outside. When the limiting post (510) and the limiting groove (540) are inserted and fitted together, the first contact piece (610) and the second contact piece (620) are fitted together, and the electromagnetic plate (330) is energized.

9. The battery cathode material preparation equipment according to claim 3, characterized in that: The casing (110) is equipped with a screening plate (210) for screening material particles by size, and a cam (240) is rotatably installed inside the casing (110) to contact the bottom of the screening plate (210). A secondary screening box (140) is installed on the side of the housing (110), and an inclined baffle (250) is installed on the edge of the screening plate (210) for guiding large particles.

10. The battery cathode material preparation apparatus according to claim 9, characterized in that: The screening plate (210) has several filter holes (211) on its side. L-shaped connecting plates (220) are fixedly installed on the upper sides of both ends of the screening plate (210). Tension springs (230) are installed on the upper side of each L-shaped connecting plate (220). The upper end of the tension springs (230) is connected to the top wall of the housing (110). A material distribution plate (260) and a sliding plate (270) are installed on the inner wall of the housing (110). The material distribution plate (260) is located directly below the screening plate (210). The sliding plate (270) is symmetrically installed below the material distribution plate (260). A baffle plate (150) is installed inside the housing (110). The baffle plate (150) is located above the feed inlet (120).

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