Spherical Graphite Multi - level Particle Size Sorting Device for Lithium - Ion Battery Anodes

Abstract

The present invention discloses a spherical graphite multi-stage particle size sorting device for lithium battery anodes, which includes a sorting box. Inside the sorting box, multiple sorting plates are arranged from top to bottom. A stacking plate is rotatably connected between two adjacent sorting plates. The device further includes: a plurality of auxiliary screening mechanisms, which are arranged in pairs with the sorting plates, and the auxiliary screening mechanisms are arranged on the upper surface of the sorting plates; a plurality of wind-assisted screening components, which are arranged in pairs with the sorting plates. The present invention integrates functions of wind force, physical pushing, preventing material blockage, and vibration sorting through the wind-assisted screening components and the auxiliary screening mechanisms in cooperation with its own traditional vibration screening, realizing high-efficiency sorting work. Secondly, the sorting efficiency can be adjusted correspondingly according to the situation, thereby further improving the practicability of the sorting device.

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;

[0003] 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

[0004] 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.

[0005] 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:

[0006] 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;

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] Optionally, a synchronization groove is provided on one side of the protective shell close to the sorting box. One end of the inner side of the synchronization groove is rotatably connected to a synchronization wheel. A linkage rod is fixedly installed at the center of one side of the synchronization wheel. The linkage rod penetrates through the outer side of the sorting box to the inside of the groove, and the linkage rod is fixedly connected to the screening fan. The central axis of the linkage rod is set to be the same as the central axis of the output shaft of the adjustment motor. The other end of the inner side of the synchronization groove is rotatably connected to another synchronization wheel. A synchronization belt is sleeved between the two synchronization wheels. A plurality of tooth grooves are provided on the outer side of the other synchronization wheel, and the other synchronization wheel is meshed with a gear through the tooth grooves. The gear is rotatably installed inside the synchronization groove, and the gear is fixedly connected to the stacking plate.

[0017] According to an 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. When the spherical graphite rolls and is screened on the sorting plate, the auxiliary screening mechanism can disorder the spherical graphite, which can not only cooperate with the wind-assisted screening component to accelerate the screening speed of the spherical graphite, but also prevent large-particle-size spherical graphite from getting stuck in the sorting holes, resulting in affecting the subsequent sorting effect, so as to sort the spherical graphite more efficiently.

[0018] Secondly, since the angle of the screening fan in the wind-assisted screening component can be adjusted by the adjustment motor, it can be adjusted correspondingly according to the sorting situation of the spherical graphite, so as to achieve different sorting efficiencies.

[0019] At the same time, through the design of the linkage adjustment component, when the angle of the screening fan is adjusted, the screening fan can drive the angle of the stacking plate to be adjusted through the linkage adjustment component, so as to further accelerate the accumulation of the spherical graphite falling from the sorting plate above the lower sorting plate, thereby further accelerating the sorting efficiency of the spherical graphite.

[0020] Other features and advantages of the present invention will become clear through the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings. Description of the Drawings

[0021] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention.

[0022] Figure 1 It is a schematic diagram of the overall structure of the multi-stage particle size sorting device for spherical graphite used in lithium battery anodes in one embodiment;

[0023] Figure 2 It is a schematic diagram of the working mode structure of the stacking plate of the multi-stage particle size sorting device for spherical graphite used in lithium battery anodes in one embodiment;

[0024] Figure 3 Schematic diagram of the linkage adjustment component structure of the spherical graphite multi-level particle size sorting device for lithium-ion battery anodes in one embodiment;

[0025] Figure 4 For the spherical graphite multi-level particle size sorting device for lithium-ion battery anodes in one embodiment Figure 3 Enlarged structure schematic diagram at position A;

[0026] Figure 5 For the spherical graphite multi-level particle size sorting device for lithium-ion battery anodes in one embodiment Figure 3 Enlarged schematic diagram at position B;

[0027] Figure 6 Schematic diagram of the wind-assisted screening component structure of the spherical graphite multi-level particle size sorting device for lithium-ion battery anodes in one embodiment;

[0028] Figure 7 For the spherical graphite multi-level particle size sorting device for lithium-ion battery anodes in one embodiment Figure 6 Enlarged structure schematic diagram at position C;

[0029] Figure 8 Schematic diagram of the screening plate structure of the spherical graphite multi-level particle size sorting device for lithium-ion battery anodes in one embodiment;

[0030] Figure 9 Schematic diagram of the sliding rod structure of the spherical graphite multi-level particle size sorting device for lithium-ion battery anodes in one embodiment;

[0031] Figure 10 Schematic diagram of the adjustment motor structure of the spherical graphite multi-level particle size sorting device for lithium-ion battery anodes in one embodiment;

[0032] Figure 11 For the spherical graphite multi-level particle size sorting device for lithium-ion battery anodes in one embodiment Figure 10 Enlarged structure schematic diagram at position D;

[0033] Figure 12 Schematic diagram of the feeding plate structure of the spherical graphite multi-level particle size sorting device for lithium-ion battery anodes in one embodiment;

[0034] Figure 13 Schematic diagram of the adjustment rod structure of the spherical graphite multi-level particle size sorting device for lithium-ion battery anodes in one embodiment;

[0035] Figure 14 For the spherical graphite multi-level particle size sorting device for lithium-ion battery anodes in one embodiment Figure 2 Enlarged structure schematic diagram at position E.

[0036] The markings in the figure are as follows: 1. Sorting box; 2. Collection 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. Return spring; 12. Transmission rod; 13. Universal joint mechanism; 14. Sliding rod; 15. Anti-blocking component; 16. Vibration motor; 301. Air inlet pipe; 302. Screening fan; 303. Adjusting motor; 601. Rotating rod; 602. Screening plate; 603. Fitting plate; 701. Baffle; 702. Linking rod; 703. Synchronous pulley; 704. Protective shell; 705. Timing belt; 706. Positioning rod; 707. Extension rod; 708. Gear; 1501. First synchronization mechanism; 1502. Feeding plate; 1503. Driving rod; 1504. Second synchronization mechanism; 1505. Positioning plate; 1506. Adjusting rod; 1507. Adjusting block; 1508. Servo motor; 1509. Gear shift button; 901. Arc edge; 902. Limit edge; 903. Inclined edge; 904. Limit backing plate. Detailed implementation manners

[0037] Now, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0038] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way limits the present invention, its application, or its use.

[0039] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be regarded as part of the specification.

[0040] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0041] As Figures 1-13 shown, the spherical graphite multi-level particle size sorting device for lithium battery negative electrodes includes a sorting box 1. Inside the sorting box 1, multiple sorting plates 5 are arranged from top to bottom. Sorting holes for sorting are formed on the sorting plates 5. A stacking plate 8 is rotatably connected between two adjacent sorting plates 5. The stacking plate 8 is inclined. On one side of the sorting box 1, multiple collection boxes 2 are arranged. Multiple collection holes are formed on one side of the sorting box 1. The collection boxes 2 are internally communicated with the collection holes and are used to collect the screened materials. It further includes:

[0042] The auxiliary screening mechanism 6 is provided with multiple groups, and the auxiliary screening mechanism 6 is arranged in pairs with the sorting plate 5. The auxiliary screening mechanism 6 is arranged on the upper surface of the sorting plate 5;

[0043] The wind-assisted screening component 3 is provided with multiple groups, and the wind-assisted screening component 3 is arranged in pairs with the sorting plate 5. The wind-assisted screening component 3 is arranged 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 in transmission connection with the wind-assisted screening component 3.

[0044] In the above-mentioned spherical graphite multi-stage particle size sorting device for lithium battery anodes, through the mutual cooperation of the wind-assisted screening component 3 and the auxiliary screening mechanism 6, simultaneous linkage is achieved to perform wind-assisted screening and mechanical-assisted screening, and in combination with traditional vibration screening of spherical graphite, multi-channel functions can be realized for screening, thereby improving the sorting efficiency of spherical graphite.

[0045] Furthermore, the wind-assisted screening component 3 includes multiple groups of screening fans 302. The multiple groups of screening fans 302 are fixedly arranged with each other. Multiple groups of grooves are opened on one side inside the sorting box 1. The grooves are located between the sorting plate 5 and the stacking plate 8. The multiple groups of screening fans 302 are rotatably installed at equal intervals inside the grooves. The auxiliary screening mechanism 6 is in transmission connection with the screening fans 302; the air inlet end of the screening fan 302 is communicated with an air inlet pipe 301. Installation grooves are opened at one end inside each of the multiple groups of grooves. An adjustment motor 303 is arranged inside the installation grooves. One end of the output shaft of the adjustment motor 303 is fixedly connected with one of the screening fans 302;

[0046] As Figures 1 to 13 shown, due to the design that one end of the output shaft of the adjustment motor 303 is fixedly connected with one of the screening fans 302, and since the multiple groups of screening fans 302 are fixedly arranged with each other, the adjustment motor 303 can drive the multiple groups of screening fans 302 to adjust the angle up and down simultaneously. Therefore, without adjusting the power of the screening fans 302, the angle of the screening fans 302 can be adjusted by the adjustment motor 303, so that the position where the wind force is concentrated is changed, thereby realizing the change of the screening efficiency of spherical graphite.

[0047] Furthermore, the auxiliary screening mechanism 6 includes multiple groups of rotating rods 601. The multiple groups of rotating rods 601 are arranged at equal intervals, and the multiple groups of rotating rods 601 are all rotatably installed inside the sorting box 1. Multiple groups of screening plates 602 are fixedly installed on the outer side of the rotating rods 601. The screening plates 602 are inclined;

[0048] Specifically, as Figure 8 shown, multiple groups of air leakage holes 10 are opened at the upper ends of one side of the multiple groups of screening plates 602, and one end of the inner circumference of the air leakage holes 10 is rounded.

[0049] Through the design of the air leakage holes 10 provided on the screening plate 602, the screening plate 602 can well avoid blocking the air flow generated by the screening fan 302 by virtue of its own inclined state and the air leakage holes 10.

[0050] Specifically, as Figure 7 shown, sorting holes 9 are provided at the upper end of the inner circumference of the screening holes for screening spherical graphite on the sorting plate 5, and both ends of the inside of the sorting holes 9 are respectively composed of an arc-shaped edge 901 and an inclined edge 903. The arc-shaped edge 901 and the inclined edge 903 are arranged oppositely, and the arc-shaped edge 901 and the inclined edge 903 are composed of a limiting edge 902 in between, and the limiting edge 902 is inclined. 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.

[0051] As Figures 1 to 13 shown, through the design of the inclined setting of the screening plate 602, when the rotating rod 601 drives the screening plate 602 to rotate, the screening plate 602 can rely on the advantages of its own inclined state to push away the larger-diameter spherical graphite staying in the middle of the surface of the inclined edge 903 through the centering of the limiting pads 904. The smaller-diameter spherical graphite can enter from the inclined position of the limiting edge 902 to realize position replacement, so as to achieve rapid screening. Therefore, the screening efficiency of spherical graphite is further improved.

[0052] It should be noted that the two groups of limiting pads 904 can limit the larger spherical graphite to avoid squeezing and driving the smaller-diameter spherical graphite when the larger-diameter spherical graphite is pushed away. Therefore, the two groups of limiting pads 904 can further improve the sorting efficiency of the sorting plate 5.

[0053] Furthermore, one end of the rotating rod 601 is fixedly installed with a transmission rod 12, one end of the transmission rod 12 is provided with a universal joint mechanism 13, one end of the rotating shaft of the screening fan 302 is fixedly installed with a sliding rod 14, and a sliding groove is provided at the end of the universal joint mechanism 13. One end of the sliding rod 14 is slidably installed inside the sliding groove;

[0054] As Figures 1 to 13 shown, through the design of the universal joint mechanism 13, no matter what position the angle of the screening fan 302 is, the rotating shaft of the screening fan 302 can still drive the rotating rod 601 to rotate and control the rotation of multiple groups of screening plates 602 through the cooperation of the sliding rod 14 and the universal joint mechanism 13.

[0055] Furthermore, multiple groups of extension grooves are provided at the bottom of the screening plate 602, and reset springs 11 are fixedly installed at the upper ends of the multiple groups of extension grooves. One end of the reset spring 11 is fixedly installed with a fitting plate 603, and the end of the fitting plate 603 is slidably installed inside the extension groove;

[0056] As Figures 1 to 13As 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.

[0057] 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;

[0058] 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.

[0059] 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.

[0060] It should be noted that when the screening fan 302 is adjusted up and down, the corresponding working conditions are as follows:

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] Through the cooperative design of the feeding plate 1502, the first synchronization mechanism 1501, the second synchronization mechanism 1504 and the servo motor 1508 with adjustable gears, when the adjusting motor 303 controls the screening fan 302 to adjust the blowing angle, the adjusting motor 303 can drive the adjusting rod 1506 through the first synchronization mechanism 1501 to make the adjusting block 1507 touch and squeeze the gear button 1509, adjusting the rotational speed gear of the output shaft of the servo motor 1508, so as to adjust the rotational speed of multiple groups of feeding plates 1502. Thus, when the screening efficiency is too fast, the discharge holes are prone to blockage. At this time, the feeding plate 1502 can be used to prevent the discharge holes from being blocked, thereby further improving the practicality of the sorting equipment.

[0066] Specifically, as Figure 14 shown, one end of the bottom of the multi-component sorting plate 5 is provided with a vibration motor 16, and the end of the sorting plate 5 is elastically connected to the inside of the sorting box 1. Thus, the vibration motor 16 is used to vibrate the sorting plate 5 to screen spherical graphite particles.

[0067] It should be noted that currently, the density of spherical graphite used for lithium-ion battery anodes 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 achieve rapid sorting 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 situation of the spherical graphite particles floating and flying, the fan power adopted in the present invention can be a fan with a power of about dozens of watts to one hundred watts for testing, observing the movement state of the graphite particles. If it is found that the particles start to float, the power of the fan can be appropriately reduced or the position and angle of the fan can be adjusted to reduce the effect of the wind force on the particles, so as to select the optimal fan power and effectively avoid the floating of spherical graphite from affecting the screening effect of multiple sorting plates 5.

[0068] Secondly, it should be noted again that the multi-component sorting plates 5 adopted in the present invention are all screened by vibration. As Figure 2 shown, the inclined upper end of the sorting plate 5 in the inclined manner is provided with a spring structure. The main function of this structure 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 starting and vibration screening to quickly sort spherical graphite particles.

[0069] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can 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. Spherical graphite multi - level particle size sorting device for lithium - ion battery negative electrode, including a sorting box (1). Inside the sorting box (1), multiple sorting plates (5) are arranged from top to bottom. Filter holes for sorting are opened on the sorting plates (5). A stacking plate (8) is rotatably connected between two adjacent sorting plates (5). The stacking plate (8) is inclined. On one side of the sorting box (1), multiple collection boxes (2) are arranged. Multiple collection holes are opened on one side of the sorting box (1). The collection boxes (2) communicate with the inside of the collection holes and are used to collect the screened materials. It is characterized in that: Further comprising: An auxiliary screening mechanism (6), multiple groups of the auxiliary screening mechanisms (6) are provided, and the auxiliary screening mechanisms (6) are arranged in pairs with the sorting plate (5), and the auxiliary screening mechanisms (6) are arranged on the upper surface of the sorting plate (5); A wind-assisted screening assembly (3), multiple groups of the wind-assisted screening assemblies (3) are provided, and the wind-assisted screening assemblies (3) are arranged in pairs with the sorting plate (5), the wind-assisted screening assemblies (3) are arranged on one side inside the sorting box (1), the wind-assisted screening assemblies (3) are located between the stacking plate (8) and the sorting plate (5), and the stacking plate (8) is in transmission connection with the wind-assisted screening assemblies (3); The wind-assisted screening assembly (3) includes multiple groups of screening fans (302), multiple groups of the screening fans (302) are fixedly arranged with each other, multiple groups of grooves are formed on one side inside the sorting box (1), the grooves are located between the sorting plate (5) and the stacking plate (8), and multiple groups of the screening fans (302) are rotatably installed in the grooves at equal intervals, and the auxiliary screening mechanism (6) is in transmission connection with the screening fans (302); An air inlet pipe (301) is communicated with the air inlet end of the screening fan (302), an installation groove is formed at one end inside each of the multiple groups of grooves, an adjustment motor (303) is arranged inside the installation groove, and one end of the output shaft of the adjustment motor (303) is fixedly connected with one of the screening fans (302); The auxiliary screening mechanism (6) includes multiple groups of rotating rods (601), multiple groups of the rotating rods (601) are arranged at equal intervals, and multiple groups of the rotating rods (601) are all rotatably installed inside the sorting box (1), multiple groups of screening plates (602) are fixedly installed on the outer side of the rotating rods (601), and the screening plates (602) are arranged obliquely; One end of the rotating rod (601) is fixedly installed with a transmission rod (12), a universal joint mechanism (13) is arranged at one end of the transmission rod (12), one end of the rotating shaft of the screening fan (302) is fixedly installed with a sliding rod (14), a sliding groove is formed at the end of the universal joint mechanism (13), and one end of the sliding rod (14) is slidably installed inside the sliding groove; Multiple groups of extension grooves are formed at the bottom of the screening plate (602), a reset spring (11) is fixedly installed at the upper end inside each of the multiple groups of extension grooves, one end of the reset spring (11) is fixedly installed with a fitting plate (603), and the end of the fitting plate (603) is slidably installed inside the extension groove.

2. The spherical graphite multi-stage particle size sorting device for lithium battery negative electrode according to claim 1, characterized in that: Multiple groups of linkage adjustment components (7) are arranged on the outer side of the sorting box (1), the linkage adjustment components (7) are arranged in pairs with the stacking plate (8), and the stacking plate (8) is in transmission connection with the screening fans (302) through the linkage adjustment components (7).

3. The spherical graphite multi-stage particle size sorting device for lithium battery negative electrodes according to claim 2, wherein: The linkage adjustment component (7) includes a baffle (701) and a protective shell (704), the baffle (701) is movably installed at one end of the stacking plate (8), and the baffle (701) is fixedly installed inside the sorting box (1), the protective shell (704) is arranged on the outer side of the sorting box (1), and the stacking plate (8) is rotatably connected with the protective shell (704).

4. The spherical graphite multi-stage particle size sorting device for lithium battery negative electrodes according to claim 3, characterized in that: A lower end of a side of the baffle (701) close to the stacking plate (8) is fixedly provided with an extension plate (4). One end of the stacking plate (8) is inclined. A positioning groove is formed at a bottom of one end of the stacking plate (8). The extension plate (4) is slidably installed inside the positioning groove. Both ends of one side of the baffle (701) are fixedly provided with positioning rods (706), and extension rods (707) are slidably installed at bottoms of the two groups of positioning rods (706). A lower end of the extension rod (707) is rotatably connected to an upper surface of the stacking plate (8).

5. The spherical graphite multi-level particle size sorting device for lithium battery negative electrode according to claim 4, characterized in that: A synchronization groove is formed in a side of the protective shell (704) close to the sorting box (1). One end of one side inside the synchronization groove is rotatably connected to a synchronization wheel (703). A center of one side of the synchronization wheel (703) is fixedly provided with a linkage rod (702). The linkage rod (702) penetrates through an 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). A central axis of the linkage rod (702) and an output shaft center of the adjustment motor (303) are arranged to be the same. The other end of one side inside the synchronization groove is rotatably connected to another synchronization wheel (703). A synchronization belt (705) is sleeved between the two groups of synchronization wheels (703). Multiple tooth grooves are formed in an outer side of the other synchronization wheel (703), and the other synchronization wheel (703) is meshed and connected to a gear (708) through the tooth grooves. The gear (708) is rotatably installed inside the synchronization groove. The gear (708) is fixedly connected to the stacking plate (8).

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