Multi-stage particle size sorting device for spherical graphite for lithium battery negative electrode

Abstract

The multi-stage particle size sorting device comprises a sorting box, a plurality of groups of sorting plates are arranged in the sorting box from top to bottom, a material stacking plate is rotationally connected between every two adjacent groups of sorting plates, the multi-stage particle size sorting device further comprises a plurality of groups of auxiliary screening mechanisms, and the sorting plates are arranged in the sorting box. The auxiliary screening mechanisms and the sorting plates are arranged in pairs, and the auxiliary screening mechanisms are arranged on the upper surfaces of the sorting plates. And the multiple sets of wind power auxiliary screening assemblies are arranged, and the wind power auxiliary screening assemblies and the sorting plates are arranged in pairs. Through the wind power auxiliary screening assembly and the auxiliary screening mechanism in cooperation with traditional vibration screening, the functions of wind power, physical pushing, material blocking prevention and vibration sorting are integrated, high-efficiency sorting work is achieved, the sorting efficiency can be correspondingly adjusted according to the situation, and therefore the practicability of the sorting device is further improved.

Description

Technical Field

[0001] The invention relates to a method for multi-level particle size sorting of spherical graphite, and more specifically, to a device for multi-level particle size sorting of spherical graphite for lithium battery negative electrode. Background Art

[0002] Multi-level particle size sorting of spherical graphite for lithium battery negative electrode is one of the key processes in the production of negative electrode materials for lithium-ion batteries. Its purpose is to improve the performance and consistency of the battery by precisely controlling the particle size distribution of graphite particles. The particle size distribution of spherical graphite has a significant impact on its performance in lithium-ion batteries. Through multi-level particle size sorting, the particle size distribution of graphite particles can be optimized, thereby improving the battery's rate performance, initial charge and discharge efficiency, and cycle stability; However, the existing technology already has the following problems: the screening method of the sorting device is single and can only rely on single vibration screening, which results in the spherical graphite screening efficiency being related to the vibration frequency. The high vibration frequency can easily lead to excessive noise in the overall equipment, thus having certain limitations. Summary of the invention

[0003] One object of the present invention is to provide a new technical solution for a spherical graphite multi-stage particle size sorting device for lithium battery negative electrode.

[0004] According to a first aspect of the present invention, a multi-stage particle size sorting device for spherical graphite for lithium battery negative electrode is provided, comprising a sorting box, wherein multiple groups of sorting plates are arranged from top to bottom inside the sorting box, filter holes for sorting are provided on the sorting plates, and stacking plates are rotatably connected between two adjacent groups of sorting plates, wherein the stacking plates are arranged in an inclined manner, multiple groups of collecting boxes are arranged on one side of the sorting box, multiple groups of collecting holes are provided on one side of the sorting box, and the collecting boxes are communicated with the inside of the collecting holes for collecting and screening materials, and further comprising: Auxiliary screening mechanisms, wherein the auxiliary screening mechanisms are provided in multiple groups, and the auxiliary screening mechanisms are provided in pairs with the sorting plates, and the auxiliary screening mechanisms are provided on the upper surface of the sorting plates; A wind-assisted screening component, wherein the wind-assisted screening component is provided in multiple groups, and the wind-assisted screening component is provided in pairs with the sorting plate, the wind-assisted screening component is provided on one side inside the sorting box, the wind-assisted screening component is located between the stacking plate and the sorting plate, and the stacking plate is transmission-connected to the wind-assisted screening component.

[0005] Optionally, the wind-assisted screening component includes multiple groups of screening fans, and the multiple groups of screening fans are fixed to each other. Multiple groups of grooves are opened on one side of the interior of the sorting box, and the grooves are located between the sorting plate and the stacking plate. The multiple groups of screening fans are installed in the grooves in an equidistant manner, and the auxiliary screening mechanism is connected to the screening fan in a driving manner.

[0006] Optionally, the air inlet end of the screening fan is connected to an air inlet duct, a mounting groove is opened at one end inside the multiple groups of grooves, an adjusting motor is arranged inside the mounting groove, and one end of the adjusting motor output shaft is fixedly connected to one group of screening fans.

[0007] Optionally, the auxiliary screening mechanism includes multiple groups of rotating rods, which are arranged equidistantly and rotatably installed inside the sorting box. Multiple groups of screening plates are fixedly installed on the outside of the rotating rods, and the screening plates are arranged at an angle.

[0008] Optionally, a transmission rod is fixedly installed at one end of the rotating rod, a universal joint mechanism is provided at one end of the transmission rod, a sliding rod is fixedly installed at one end of the rotating shaft of the screening fan, a sliding groove is provided at the end of the universal joint mechanism, and one end of the sliding rod is slidably installed inside the sliding groove.

[0009] Optionally, a plurality of extension grooves are provided at the bottom of the screening plate, and return springs are fixedly installed at the upper ends of the plurality of extension grooves. A fitting plate is fixedly installed at one end of the return spring, and the end of the fitting plate is slidably installed inside the extension groove.

[0010] Optionally, a plurality of linkage adjustment components are arranged on the outside of the sorting box, the linkage adjustment components are arranged in pairs with the stacking plates, and the stacking plates are drivingly connected to the screening fans through the linkage adjustment components.

[0011] Optionally, the linkage adjustment assembly includes a baffle and a protective shell, the baffle is movably mounted on one end of the stacking plate, and the baffle is fixedly mounted inside the sorting box, the protective shell is arranged outside the sorting box, and the stacking plate is rotatably connected to the protective shell.

[0012] Optionally, an extension plate is fixedly installed at the lower end of the baffle plate on one side close to the stacking plate, one end of the stacking plate is inclined, a positioning groove is opened at the bottom of one end of the stacking plate, and the extension plate is slidably installed inside the positioning groove, positioning rods are fixedly installed at both ends of one side of the baffle plate, and extension rods are slidably installed at the bottom of the two groups of positioning rods, and the lower end of the extension rod is rotatably connected to the upper surface of the stacking plate.

[0013] Optionally, a synchronous groove is provided on one side of the protective shell close to the sorting box, and one end of one side inside the synchronous groove is rotatably connected to a synchronous wheel, and a linkage rod is fixedly installed at the center of one side of the synchronous wheel, the linkage rod passes through the outside of the sorting box to the inside of the groove, and the linkage rod is fixedly connected to the screening fan, and the central axis of the linkage rod is arranged at the same center as the output shaft of the adjusting motor, and the other end of one side inside the synchronous groove is rotatably connected to another group of synchronous wheels, a synchronous belt is provided between the two groups of synchronous wheels, and a plurality of groups of tooth grooves are provided on the outside of the other group of synchronous wheels, and the other group of synchronous wheels is connected to gears through tooth groove meshing, and the gears are rotatably installed inside the synchronous groove, and the gears are fixedly connected to the stacking plate.

[0014] According to one embodiment of the present disclosure, when the sorting plate screens spherical graphite through vibration and its own inclination angle, the wind-assisted screening component can accelerate the rolling speed of the spherical graphite, thereby improving the screening efficiency. Secondly, the wind-assisted screening component drives the auxiliary screening mechanism to realize the auxiliary screening mechanism to confuse the spherical graphite when the spherical graphite rolls on the sorting plate for screening. It can not only cooperate with the wind-assisted screening component to accelerate the screening speed of the spherical graphite, but also avoid the large-size spherical graphite from being stuck in the sorting hole, which affects the subsequent sorting effect, so that the spherical graphite can be sorted more quickly and efficiently.

[0015] Secondly, since the angle of the screening fan in the wind-assisted screening component can be changed and adjusted by adjusting the motor, it can be adjusted accordingly according to the need for sorting of spherical graphite to achieve different sorting efficiencies.

[0016] At the same time, through the design of the linkage adjustment component, when the screening fan angle is adjusted, the screening fan can adjust the angle of the stacking plate through the linkage adjustment component, so that the spherical graphite that falls from the sorting plate can be further accelerated to accumulate above the sorting plate below, thereby further accelerating the sorting efficiency of the spherical graphite.

[0017] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0019] Figure 1 A schematic diagram of the overall structure of a spherical graphite multi-stage particle size sorting device for lithium battery negative electrode in one embodiment; Figure 2 A schematic diagram of the structure of a stacking plate working mode of a spherical graphite multi-stage particle size sorting device for lithium battery negative electrode in one embodiment; Figure 3A schematic diagram of the structure of a linkage adjustment component of a spherical graphite multi-stage particle size sorting device for lithium battery negative electrode in one embodiment; Figure 4 A spherical graphite multi-stage particle size sorting device for lithium battery negative electrode in one embodiment Figure 3 A schematic diagram of the enlarged structure at point A; Figure 5 A spherical graphite multi-stage particle size sorting device for lithium battery negative electrode in one embodiment Figure 3 An enlarged schematic diagram of point B; Figure 6 A schematic diagram of the structure of a wind-assisted screening component of a multi-stage particle size sorting device for spherical graphite for lithium battery negative electrode in one embodiment; Figure 7 A spherical graphite multi-stage particle size sorting device for lithium battery negative electrode in one embodiment Figure 6 A schematic diagram of the enlarged structure at C; Figure 8 A schematic diagram of the screening plate structure of a spherical graphite multi-stage particle size sorting device for lithium battery negative electrode in one embodiment; Fig. 9 A schematic diagram of the structure of a sliding rod of a spherical graphite multi-stage particle size sorting device for lithium battery negative electrode in one embodiment; Fig.10 A schematic diagram of the structure of an adjusting motor of a spherical graphite multi-stage particle size sorting device for lithium battery negative electrode in one embodiment; Fig.11 A spherical graphite multi-stage particle size sorting device for lithium battery negative electrode in one embodiment Fig.10 A schematic diagram of the structure at D of FIG. Fig.12 A schematic diagram of the structure of a feeding plate of a spherical graphite multi-stage particle size sorting device for lithium battery negative electrode in one embodiment; Fig.13 A schematic diagram of the structure of an adjusting rod of a spherical graphite multi-stage particle size sorting device for a lithium battery negative electrode in one embodiment; Fig.14 A spherical graphite multi-stage particle size sorting device for lithium battery negative electrode in one embodiment Figure 2 Enlarged structural diagram at E.

[0020] The following are marked in the figure: 1. Sorting box; 2. Collecting box; 3. Wind-assisted screening component; 4. Extension plate; 5. Sorting plate; 6. Auxiliary screening mechanism; 7. Linkage adjustment component; 8. Stacking plate; 9. Sorting hole; 10. Air leakage hole; 11. Reset spring; 12. Transmission rod; 13. Universal joint mechanism; 14. Sliding rod; 15. Anti-blocking component; 16. Vibrating motor; 301. Air inlet pipe; 302. Screening fan; 303. Adjusting motor; 601. Rotating rod; 602. Screening plate; 603. Laminating plate; 701 , baffle; 702, linkage rod; 703, synchronous wheel; 704, protective shell; 705, synchronous belt; 706, positioning rod; 707, extension rod; 708, gear; 1501, first synchronous mechanism; 1502, feeding plate; 1503, driving rod; 1504, second synchronous mechanism; 1505, positioning plate; 1506, adjusting rod; 1507, adjusting block; 1508, servo motor; 1509, gear button; 901, arc edge; 902, limit edge; 903, inclined edge; 904, limit pad. DETAILED DESCRIPTION

[0021] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0022] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0023] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0024] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0025] like Figure 1-13 As shown, a spherical graphite multi-stage particle size sorting device for lithium battery negative electrode includes a sorting box 1, wherein multiple groups of sorting plates 5 are arranged from top to bottom inside the sorting box 1, and filter holes for sorting are opened on the sorting plates 5, and a stacking plate 8 is rotatably connected between two adjacent groups of sorting plates 5, and the stacking plate 8 is arranged in an inclined manner, and multiple groups of collecting boxes 2 are arranged on one side of the sorting box 1, and multiple groups of collecting holes are opened on one side of the sorting box 1, and the collecting boxes 2 are communicated with the inside of the collecting holes for collecting and screening materials, and also includes: Auxiliary screening mechanism 6, the auxiliary screening mechanism 6 is provided with multiple groups, and the auxiliary screening mechanism 6 is provided in pairs with the sorting plate 5, and the auxiliary screening mechanism 6 is provided on the upper surface of the sorting plate 5; Wind-assisted screening components 3, multiple groups of wind-assisted screening components 3 are arranged, and the wind-assisted screening components 3 are arranged in pairs with the sorting plates 5, the wind-assisted screening components 3 are arranged on one side inside the sorting box 1, the wind-assisted screening components 3 are located between the stacking plate 8 and the sorting plate 5, and the stacking plate 8 is transmission-connected to the wind-assisted screening components 3.

[0026] The above-mentioned spherical graphite multi-level particle size sorting device for lithium battery negative electrode cooperates with each other through the wind-assisted screening component 3 and the auxiliary screening mechanism 6 to achieve simultaneous linkage, carry out wind-assisted screening and mechanical-assisted screening, and cooperate with traditional vibration screening of spherical graphite, so as to realize multi-channel screening, thereby improving the sorting efficiency of spherical graphite.

[0027] Further, the wind-assisted screening component 3 includes a plurality of screening fans 302, the plurality of screening fans 302 are fixedly arranged with each other, a plurality of grooves are provided on one side of the inner side of the sorting box 1, the grooves are located between the sorting plate 5 and the stacking plate 8, the plurality of screening fans 302 are equidistantly rotated and installed inside the grooves, the auxiliary screening mechanism 6 is transmission-connected with the screening fans 302; the air inlet end of the screening fan 302 is connected with the air inlet pipe 301, one end of the plurality of grooves is provided with a mounting groove, an adjusting motor 303 is arranged inside the mounting groove, and one end of the output shaft of the adjusting motor 303 is fixedly connected with one of the screening fans 302; like Figures 1 to 13 As shown, by adjusting the design that one end of the output shaft of the motor 303 is fixedly connected to one group of screening fans 302, since the multiple groups of screening fans 302 are fixed to each other, the adjusting motor 303 can drive the multiple groups of screening fans 302 to adjust their angles up and down at the same time. Therefore, when the power of the screening fan 302 is not adjusted, the angle of the screening fan 302 can be adjusted by adjusting the motor 303 to change the wind concentration position, thereby achieving the change in the screening efficiency of spherical graphite.

[0028] Furthermore, the auxiliary screening mechanism 6 includes a plurality of rotating rods 601, which are arranged equidistantly, and are all rotatably mounted inside the sorting box 1, and a plurality of screening plates 602 are fixedly mounted outside the rotating rods 601, and the screening plates 602 are arranged obliquely; Specifically, Figure 8 As shown, multiple groups of air leakage holes 10 are provided at the upper end of one side of multiple groups of screening plates 602, and one end of the inner circle of the air leakage holes 10 is rounded.

[0029] By providing the air leakage holes 10 on the screening plate 602 , the screening plate 602 can effectively avoid blocking the airflow generated by the screening fan 302 by relying on its own tilted state and the air leakage holes 10 .

[0030] Specifically, Figure 7As shown, a sorting hole 9 is opened at the upper end of the inner circle of the screening hole on the sorting plate 5 for screening spherical graphite, and the two ends of the sorting hole 9 are respectively composed of an arcuate edge 901 and an inclined edge 903, the arcuate edge 901 and the inclined edge 903 are arranged opposite to each other, and a limiting edge 902 is formed between the arcuate edge 901 and the inclined edge 903, and the limiting edge 902 is inclined, and the inclined edge 903 is trapezoidally arranged through the limiting edge 902, and limiting pads 904 are symmetrically arranged at both ends of the surface of the inclined edge 903.

[0031] like Figures 1 to 13 As shown, by the inclined design of the screening plate 602, when the rotating rod 601 drives the screening plate 602 to rotate, the screening plate 602 can rely on its own inclined state advantage to push away the larger particle size spherical graphite trapped in the middle of the surface of the inclined edge 903 through the limiting pad 904, and the smaller particle size spherical graphite can enter from the inclined position of the limiting edge 902 to achieve position replacement, thereby achieving rapid screening, thereby further improving the screening efficiency of spherical graphite.

[0032] It should be noted that the two sets of limiting pads 904 can limit the larger spherical graphite to prevent the spherical graphite with larger particles from being pushed away and squeezing the spherical graphite with smaller particles. Therefore, the two sets of limiting pads 904 can further improve the sorting efficiency of the sorting plate 5.

[0033] Further, a transmission rod 12 is fixedly installed at one end of the rotating rod 601, a universal joint mechanism 13 is provided at one end of the transmission rod 12, a sliding rod 14 is fixedly installed at one end of the rotating shaft of the screening fan 302, a sliding groove is provided at the end of the universal joint mechanism 13, and one end of the sliding rod 14 is slidably installed inside the sliding groove; like Figures 1 to 13 As shown, through the design of the universal joint mechanism 13, no matter the angle of the screening fan 302, the rotating shaft of the screening fan 302 can still realize the rotation of the transmission rotating rod 601 through the cooperation of the sliding rod 14 and the universal joint mechanism 13, thereby controlling the rotation of multiple groups of screening plates 602.

[0034] Furthermore, the bottom of the screening plate 602 is provided with multiple groups of extension grooves, and the upper ends of the multiple groups of extension grooves are fixedly installed with return springs 11, and one end of the return spring 11 is fixedly installed with a bonding plate 603, and the end of the bonding plate 603 is slidably installed in the extension groove; like Figures 1 to 13 As shown, the bonding plate 603 is fixedly installed at one end of the reset spring 11. The bonding plate 603 can be close to and fit into the upper surface of the sorting plate 5 through the action of the reset spring 11, which is beneficial for the screening plate 602 to drive the bonding plate 603 to push the spherical graphite with larger particles retained in the filter holes and the sorting holes 9.

[0035] Furthermore, a plurality of linkage adjustment components 7 are arranged outside the sorting box 1, and the linkage adjustment components 7 are arranged in pairs with the stacking plates 8, and the stacking plates 8 are connected to the screening fan 302 through the linkage adjustment components 7; The linkage adjustment assembly 7 includes a baffle 701 and a protective shell 704. The baffle 701 is movably mounted on one end of the stacking plate 8, and the baffle 701 is fixedly mounted inside the sorting box 1. The protective shell 704 is arranged on the outside of the sorting box 1, and the stacking plate 8 is rotatably connected to the protective shell 704; an extension plate 4 is fixedly mounted on the lower end of the baffle 701 on one side close to the stacking plate 8, and one end of the stacking plate 8 is inclined. A positioning groove is provided at the bottom of one end of the stacking plate 8, and the extension plate 4 is slidably mounted inside the positioning groove. Positioning rods 706 are fixedly mounted on both ends of one side of the baffle 701, and extension rods 707 are slidably mounted on the bottom of the two groups of positioning rods 706, and the lower end of the extension rod 707 is rotatably connected to the upper surface of the stacking plate 8; a side of the protective shell 704 close to the sorting box 1 A synchronous groove is provided on the side, and one end of one side of the synchronous groove is rotatably connected with a synchronous wheel 703, and a linkage rod 702 is fixedly installed at the center of one side of the synchronous wheel 703. The linkage rod 702 passes through the outer side of the sorting box 1 to the inside of the groove, and the linkage rod 702 is fixedly connected to the screening fan 302. The central axis of the linkage rod 702 is arranged at the same center as the output shaft of the regulating motor 303. Another set of synchronous wheels 703 is rotatably connected to the other end of one side of the synchronous groove. A synchronous belt 705 is sleeved between the two sets of synchronous wheels 703. Multiple sets of tooth grooves are provided on the outer side of the other set of synchronous wheels 703, and the other set of synchronous wheels 703 is connected with a gear 708 through the meshing of the tooth grooves. The gear 708 is rotatably installed in the synchronous groove, and the gear 708 is fixedly connected to the stacking plate 8. like Figures 1 to 13 As shown, through the design of gear 708, synchronous wheel 703, synchronous belt 705 and linkage rod 702, when the angle of screening fan 302 is adjusted, the angle of stacking plate 8 can be correspondingly driven to be adjusted through linkage rod 702, synchronous wheel 703 and gear 708, so that different screening efficiencies can be adjusted according to the required working conditions. Therefore, the practicality of the screening equipment for spherical graphite for lithium battery negative electrode can be further improved.

[0036] It should be noted that when the screening fan 302 is adjusted up and down, the corresponding working conditions are as follows: When the screening fan 302 is adjusted upward, the gear 708, the synchronous wheel 703, the synchronous belt 705 and the linkage rod 702 cooperate with each other to control the angle of the stacking plate 8 and rotate upward at the same time. The spherical graphite particles that fall onto the stacking plate 8 after sorting will slowly fall onto the sorting plate 5 due to the stacking plate 8 after the upward angle. At this moment, the wind force generated by the screening fan 302 will come into contact with the spherical graphite to a small extent. At this moment, the sorting speed of the spherical graphite particles will slowly decrease. This working mode is mainly used for sorting a large number of spherical graphite particles, and can achieve higher sorting accuracy and better effect.

[0037] When the screening fan 302 is adjusted downward, the angle of the stacking plate 8 will be downward at the same time, and the effect that can be achieved is opposite to the above. It is mainly used in the case where too few spherical graphite particles need to be quickly sorted, and the present invention will not be described in detail again.

[0038] Specifically, Figures 1 to 13 As shown, a discharge hole is opened at the lower end of the sorting box 1, and an anti-blocking component 15 is arranged in the discharge hole, and the anti-blocking component 15 is transmission-connected to one of the adjustment motors 303.

[0039] Further, such as Figures 1 to 13 As shown, the anti-blocking component 15 in the above-mentioned embodiment includes a first synchronization mechanism 1501, a second synchronization mechanism 1504 and a positioning plate 1505, the positioning plate 1505 is arranged at the upper end of the inner part of the discharge hole, and the bottom of the positioning plate 1505 is rotatably connected to the driving rod 1503, and a plurality of groups of feeding plates 1502 are fixedly installed on the upper end of the outer side of the driving rod 1503, and the plurality of groups of feeding plates 1502 are all arranged in contact with the inner wall of the feeding hole, and one side of the feeding plate 1502 is inclined, and a first synchronization mechanism 1501 is fixedly sleeved on the outer side of the output shaft of one group of the adjusting motor 303, and a transmission groove is opened inside the sorting box 1, and the transmission groove is communicated with the inside of the installation groove, the first synchronization mechanism 1501 is arranged inside the transmission groove, and the first synchronization mechanism 1501 The lower end is transmission-connected with an adjusting rod 1506, and a plurality of adjusting blocks 1507 are fixedly installed around one end of the adjusting rod 1506. The plurality of adjusting blocks 1507 are arranged in a circular shape with equal spacing, and one side of the adjusting block 1507 is inclined. A servo motor 1508 is arranged at one end inside the transmission groove, and a gear button 1509 for controlling the speed gear of the servo motor 1508 is arranged on the outside of the servo motor 1508. The adjusting block 1507 and the gear button 1509 are arranged correspondingly. One end of the output shaft of the servo motor 1508 is transmission-connected with the second synchronization mechanism 1504, and a docking groove is provided at one end of the positioning plate 1505. The second synchronization mechanism 1504 is located inside the docking groove, and one end of the second synchronization mechanism 1504 is transmission-connected with the driving rod 1503.

[0040] Through the design of the cooperation between the feeding plate 1502, the first synchronization mechanism 1501, the second synchronization mechanism 1504 and the servo motor 1508 with adjustable different gears, when the adjustment motor 303 controls the screening fan 302 to adjust the blowing angle, the adjustment motor 303 can simultaneously drive the adjustment rod 1506 through the first synchronization mechanism 1501 to make the adjustment block 1507 touch the extrusion gear button 1509, and adjust the speed gear of the output shaft of the servo motor 1508 to adjust the rotation speed of multiple groups of feeding plates 1502. When the screening efficiency is too fast, the discharge hole is easily blocked. At this time, the feeding plate 1502 can be used to avoid the discharge hole from being blocked, thereby further improving the practicability of the sorting equipment.

[0041] Specifically, Fig.14 As shown, a vibration motor 16 is provided at one end of the bottom of the multi-group sorting plate 5, and the end of the sorting plate 5 is elastically connected to the inside of the sorting box 1, so that the vibration motor 16 is used for the sorting plate 5 to vibrate and screen the spherical graphite particles.

[0042] It should be noted that the density of spherical graphite used in the negative electrode of lithium batteries is relatively small. In actual use, due to the accumulation of sorted spherical graphite particles, the accumulated spherical graphite particles can rely on the inclination angle of the sorting plate 5 and be quickly sorted through the vibration motor 16. At the same time, in order to ensure that the fan can blow the spherical graphite particles to flow and avoid the spherical graphite particles from floating and flying, the fan power used in the present invention can be selected from a fan with a power of tens of watts to about one hundred watts for testing, and the movement state of the graphite particles is observed. If it is found that the particles begin to float, the fan power can be appropriately reduced or the fan position and angle can be adjusted to reduce the effect of wind on the particles, thereby selecting the optimal fan power to effectively avoid the floating of spherical graphite and affect the screening effect of multiple sorting plates 5.

[0043] Secondly, it should be noted again that the multi-group sorting plate 5 used in the present invention is screened by vibration, such as Figure 2 The inclined upper end of the inclined sorting plate 5 shown is provided with a spring structure, the main function of which is to prevent the vibration force from being directly transmitted to the sorting box 1, resulting in excessive sorting noise. Therefore, the present invention adopts a combination of start-up and vibration screening to quickly sort spherical graphite particles.

[0044] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A spherical graphite multi-stage particle size sorting device for lithium battery negative electrode, comprising a sorting box (1), wherein a plurality of sorting plates (5) are arranged from top to bottom inside the sorting box (1), wherein the sorting plates (5) are provided with filter holes for sorting, wherein a stacking plate (8) is rotatably connected between two adjacent groups of sorting plates (5), wherein the stacking plate (8) is arranged in an inclined manner, wherein a plurality of collecting boxes (2) are arranged on one side of the sorting box (1), wherein a plurality of collecting holes are provided on one side of the sorting box (1), wherein the collecting boxes (2) are communicated with the inside of the collecting holes and are used for collecting and screening materials, wherein the plurality of collecting boxes (2) are communicated with the inside of the collecting holes and are used for collecting and screening materials, wherein the plurality of collecting boxes (2) are communicated with the inside of the collecting holes and are used for collecting and screening materials, wherein the plurality of collecting boxes (2) are communicated with the inside of the collecting holes and are used for collecting and screening materials, wherein the plurality of collecting boxes (2) are communicated with the inside of the collecting holes and are used for collecting and screening materials, and ... Also includes: Auxiliary screening mechanisms (6), wherein the auxiliary screening mechanisms (6) are provided in multiple groups, and the auxiliary screening mechanisms (6) and the sorting plate (5) are provided in pairs, and the auxiliary screening mechanisms (6) are provided on the upper surface of the sorting plate (5); A wind-assisted screening component (3), wherein the wind-assisted screening component (3) is provided in a plurality of groups, and the wind-assisted screening component (3) and the sorting plate (5) are provided in pairs, the wind-assisted screening component (3) is provided on one side inside the sorting box (1), the wind-assisted screening component (3) is located between the stacking plate (8) and the sorting plate (5), and the stacking plate (8) is transmission-connected to the wind-assisted screening component (3).

2. The multi-stage particle size sorting device for spherical graphite for lithium battery negative electrode according to claim 1, characterized in that: The wind-assisted screening component (3) comprises a plurality of screening fans (302), the plurality of screening fans (302) being fixedly arranged with each other, a plurality of grooves being provided on one side of the interior of the sorting box (1), the grooves being located between the sorting plate (5) and the stacking plate (8), the plurality of screening fans (302) being equidistantly rotatably installed inside the grooves, and the auxiliary screening mechanism (6) being transmission-connected to the screening fans (302).

3. The multi-stage particle size sorting device for spherical graphite for lithium battery negative electrode according to claim 2, characterized in that: The air inlet end of the screening fan (302) is connected to an air inlet pipe (301), and a mounting groove is provided at one end inside the plurality of groups of grooves. An adjusting motor (303) is arranged inside the mounting groove, and one end of an output shaft of the adjusting motor (303) is fixedly connected to one group of the screening fans (302).

4. The multi-stage particle size sorting device for spherical graphite for lithium battery negative electrode according to claim 3, characterized in that: The auxiliary screening mechanism (6) comprises a plurality of groups of rotating rods (601), the plurality of groups of rotating rods (601) being arranged at equal intervals, and the plurality of groups of rotating rods (601) being rotatably mounted inside the sorting box (1), and a plurality of groups of screening plates (602) being fixedly mounted outside the rotating rods (601), and the screening plates (602) being arranged in an inclined manner.

5. The multi-stage particle size sorting device for spherical graphite for lithium battery negative electrode according to claim 4, characterized in that: A transmission rod (12) is fixedly mounted on one end of the rotating rod (601), a universal joint mechanism (13) is provided on one end of the transmission rod (12), a sliding rod (14) is fixedly mounted on one end of the rotating shaft of the screening fan (302), a sliding groove is provided at the end of the universal joint mechanism (13), and one end of the sliding rod (14) is slidably mounted inside the sliding groove.

6. The multi-stage particle size sorting device for spherical graphite for lithium battery negative electrode according to claim 5, characterized in that: The bottom of the screening plate (602) is provided with a plurality of extension grooves, and a return spring (11) is fixedly mounted on the upper ends of the plurality of extension grooves. A bonding plate (603) is fixedly mounted on one end of the return spring (11), and the end of the bonding plate (603) is slidably mounted inside the extension grooves.

7. The multi-stage particle size sorting device for spherical graphite for lithium battery negative electrode according to claim 6, characterized in that: A plurality of groups of linkage adjustment components (7) are arranged outside the sorting box (1); the linkage adjustment components (7) and the stacking plates (8) are arranged in pairs; and the stacking plates (8) are transmission-connected to the screening fans (302) via the linkage adjustment components (7).

8. The multi-stage particle size sorting device for spherical graphite for lithium battery negative electrode according to claim 7, characterized in that: The linkage adjustment assembly (7) comprises a baffle (701) and a protective shell (704); the baffle (701) is movably mounted on one end of a stacking plate (8), and the baffle (701) is fixedly mounted inside a sorting box (1); the protective shell (704) is arranged outside the sorting box (1); and the stacking plate (8) is rotatably connected to the protective shell (704).

9. The multi-stage particle size sorting device for spherical graphite for lithium battery negative electrode according to claim 8, characterized in that: An extension plate (4) is fixedly mounted on the lower end of the baffle plate (701) on one side close to the stacking plate (8); one end of the stacking plate (8) is arranged in an inclined manner; a positioning groove is provided at the bottom of one end of the stacking plate (8); the extension plate (4) is slidably mounted inside the positioning groove; positioning rods (706) are fixedly mounted on both ends of one side of the baffle plate (701); and extension rods (707) are slidably mounted on the bottoms of the two sets of positioning rods (706); and the lower ends of the extension rods (707) are rotatably connected to the upper surface of the stacking plate (8).

10. The multi-stage particle size sorting device for spherical graphite for lithium battery negative electrode according to claim 9, characterized in that: A synchronous groove is provided on one side of the protective shell (704) close to the sorting box (1); a synchronous wheel (703) is rotatably connected to one end of one side of the synchronous groove; a linkage rod (702) is fixedly installed at the center of one side of the synchronous wheel (703); the linkage rod (702) passes through the outside of the sorting box (1) to the inside of the groove; the linkage rod (702) is fixedly connected to the screening fan (302); the center axis of the linkage rod (702) is arranged at the same center as the output shaft of the regulating motor (303); another group of synchronous wheels (703) is rotatably connected to the other end of one side of the synchronous groove; a synchronous belt (705) is sleeved between the two groups of synchronous wheels (703); a plurality of groups of tooth grooves are provided on the outside of the other group of synchronous wheels (703); the other group of synchronous wheels (703) is meshed with a gear (708) through the tooth grooves; the gear (708) is rotatably installed in the synchronous groove; and the gear (708) is fixedly connected to the stacking plate (8).

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