Particle size grading screening device for lithium battery positive electrode materials

Abstract

The utility model relates to the technical field of lithium battery material sorting, in particular to a lithium battery positive electrode material particle size grading screening device which comprises a feeding mechanism, a dehumidification assembly arranged in the feeding mechanism and a sorting mechanism arranged in the feeding mechanism. The feeding mechanism comprises a sealing cover, an air pipe arranged on one side of the sealing cover, a feeding pipe arranged on the other side of the sealing cover and a discharging pipe installed at the bottom of the sealing cover. The heat release pipe is arranged in the feeding mechanism, and when a heating coil in the heat release pipe is electrified and continuously releases heat, airflow continuously input through the air pipe can be matched with the sorting mechanism to sort the particle sizes of the battery positive electrode materials; and the sorted materials with different particle sizes can be heated and dried under the action of continuous vibration and downward blowing of airflow, so that the sorted materials with different particle sizes and widths can be kept dry, and the materials are prevented from being affected with damp during sorting.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery material sorting, in particular to a particle size grading and screening device for lithium battery cathode materials. Background Technique

[0002] Lithium battery cathode materials are mainly composed of lithium-containing transition metal oxides, including lithium carbonate, lithium hydroxide, nickel sulfate, manganese sulfate, cobalt sulfate, etc. Most of these raw materials are extracted from mineral resources such as lithium, cobalt, nickel, and manganese. Among them, lithium carbonate and lithium hydroxide are the core raw materials, which are mainly extracted from lithium mines or salt lake brines. These materials directly affect the core performance of lithium batteries, such as energy density, safety, and cycle life.

[0003] However, there are still certain defects in the sorting process. During the transfer of raw materials to sorting, due to the interference of environmental factors, high-nickel cathode materials are most likely to absorb moisture in the air, which will cause the particles to become larger and produce a non-electrochemical film layer, seriously reducing the performance of the battery.

[0004] In view of this, a particle size grading and screening device for lithium battery cathode materials is designed to solve the above problems. Content of the Utility Model

[0005] The utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the technical solution adopted by the utility model is as follows:

[0007] A particle size grading and screening device for lithium battery cathode materials includes a feeding mechanism, a dehumidification component arranged in the feeding mechanism, and a sorting mechanism arranged in the feeding mechanism; the feeding mechanism includes a sealing cover, an air duct arranged on one side of the sealing cover, a feeding pipe arranged on the other side of the sealing cover, and a discharging pipe installed at the bottom of the sealing cover; the dehumidification component includes a heat release pipe arranged in the middle of the inner cavity of the discharging pipe and a heating coil arranged inside the heat release pipe; the sorting mechanism includes a top sieve plate movably installed in the inner cavity of the discharging pipe, two stability-enhancing wing plates installed on both sides of the top sieve plate, a first-stage sieve plate, a second-stage sieve plate, and a third-stage sieve plate fixedly installed between the two stability-enhancing wing plates and distributed at equal intervals.

[0008] In a preferred example of the utility model, it can be further configured as follows: the feeding mechanism further includes a first baffle movably installed inside the feeding pipe and a discharging head installed at the bottom end of the discharging pipe;

[0009] Six uniformly distributed notches are opened on the outer wall of the discharging pipe, and slag discharge pipes are installed outside the six notches;

[0010] The slag discharge pipe is integrally in an L-shaped structure, and a hopper is fixedly installed at the bottom of the slag discharge pipe.

[0011] In a preferred embodiment of the present utility model, it can be further configured that: the dehumidification component further includes an energy supply component fixedly installed inside the sealing cover, and the heat release pipe is fixedly installed at the bottom of the energy supply component, and a plug is installed at the bottom end of the heat release pipe.

[0012] In a preferred embodiment of the present utility model, it can be further configured that: the sorting mechanism further includes a chassis installed on the top of the sealing cover, a motor installed inside the chassis, a runner installed on the transmission shaft inside the chassis, a traction plate movably installed on the runner, and a pull rod movably installed at the other end of the traction plate;

[0013] The sorting mechanism further includes a rod sleeve fixedly installed inside the sealing cover, and the pull rod is movably installed inside the rod sleeve.

[0014] In a preferred embodiment of the present utility model, it can be further configured that: an outer side pan bucket is fixedly installed on the outer side of the top of the top sieve plate, and an inner side pan bucket is fixedly installed on the inner side of the top of the top sieve plate;

[0015] An outer eight - character inclined plane is formed on the inner side of the outer side pan bucket;

[0016] An inner eight - character inclined plane is formed on the outer side of the inner side pan bucket.

[0017] In a preferred embodiment of the present utility model, it can be further configured that: the sorting mechanism further includes six second baffles, and the width of the second baffle is twice the width of the discharge pipe port, and every two second baffles form a group.

[0018] In a preferred embodiment of the present utility model, it can be further configured that: the first - stage sieve plate, the second - stage sieve plate, and the third - stage sieve plate are all in a funnel - shaped structure, and the diameter widths of the mesh holes on the inclined surfaces of the first - stage sieve plate, the second - stage sieve plate, and the third - stage sieve plate gradually decrease.

[0019] By adopting the above - mentioned technical solution, the beneficial effects obtained by the present utility model are as follows:

[0020] 1. By arranging a heat release pipe inside the feeding mechanism of the present utility model, when the heating coil inside the heat release pipe is electrified and continuously releases heat, the air flow continuously input through the air duct can cooperate with the sorting mechanism to perform particle size sorting on the battery cathode material, and the materials with different particle sizes after sorting can be heat - dried under the action of continuous vibration and being blown downward by the air flow, so as to ensure that the materials with different particle size widths after sorting can maintain dryness and avoid moisture absorption during material sorting. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram when the present utility model is in use;

[0022] Figure 2It is a partial sectional view of the present utility model;

[0023] Figure 3 It is an exploded view of the feeding mechanism of the present utility model;

[0024] Figure 4 It is a schematic view of the water removal component of the present utility model;

[0025] Figure 5 It is a schematic view of the sorting mechanism of the present utility model.

[0026] Reference numerals:

[0027] 100. Feeding mechanism; 110. Sealing cover; 120. Discharge pipe; 130. Discharge head; 140. Air duct; 150. Feed pipe; 160. First baffle; 170. Slag discharge pipe; 180. Hopper;

[0028] 200. Dehumidification component; 210. Energy supply component; 220. Heat release pipe; 230. Plug; 240. Heating coil;

[0029] 300. Sorting mechanism; 310. Chassis; 320. Motor; 3201. Runner; 3202. Traction plate; 3203. Pull rod; 330. Rod sleeve; 340. Top sieve plate; 3401. Outer side pan hopper; 3402. Inner side pan hopper; 350. Stability enhancing wing plate; 360. First stage sieve plate; 370. Second stage sieve plate; 380. Third stage sieve plate; 390. Second baffle. Detailed implementation manners

[0030] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in combination with the specific implementation manners and with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other.

[0031] It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present utility model.

[0032] The following describes a particle size grading and screening device for lithium battery cathode materials provided by some embodiments of the present utility model in combination with the accompanying drawings.

[0033] Embodiment 1: In combination with Figures 1 to 5As shown in the figure, a particle size grading and screening device for the positive electrode material of a lithium battery provided by the present utility model includes a feeding mechanism 100, a dehumidification component 200 arranged inside the feeding mechanism 100, and a sorting mechanism 300 arranged inside the feeding mechanism 100. The feeding mechanism 100 provides pressurization for the sorting of the battery positive electrode material in cooperation with the continuous input of air flow. The dehumidification component 200 is used for heat drying treatment of the materials during the screening and vibration sorting process. The sorting mechanism 300, in cooperation with the dehumidification component 200, is used for sorting particles with different particle sizes in the materials.

[0034] The feeding mechanism 100 includes a sealing cover 110, an air duct 140 arranged on one side of the sealing cover 110, a feeding pipe 150 arranged on the other side of the sealing cover 110, and a discharging pipe 120 installed at the bottom of the sealing cover 110;

[0035] The dehumidification component 200 includes a heat release pipe 220 arranged in the middle of the inner cavity of the discharging pipe 120 and a heating coil 240 arranged inside the heat release pipe 220;

[0036] The sorting mechanism 300 includes a top sieve plate 340 movably installed in the inner cavity of the discharging pipe 120, two stability enhancing wing plates 350 installed on both sides of the top sieve plate 340, and a first-stage sieve plate 360, a second-stage sieve plate 370, and a third-stage sieve plate 380 fixedly installed between the two stability enhancing wing plates 350 and distributed at equal intervals.

[0037] After the first baffle 160 is lifted upward, a selected amount of materials is transferred into the inner cavity of the sealing cover 110 through the feeding pipe 150. Then, the first baffle 160 is closed again inside the feeding pipe 150. At the same time, air is continuously supplied into the inner cavity of the sealing cover 110 through the air duct 140. The materials under the action of the air blowing will be pressed and quickly fall, and finally temporarily stored at the top of the top sieve plate 340;

[0038] As the top sieve plate 340 is regularly pulled and vibrated in the vertical direction, the materials temporarily stored at its top can be forcibly loosened in cooperation with the air flow. The materials that are screened and vibrated and continue to fall after passing through the top sieve plate 340 can sequentially pass through the first-stage sieve plate 360, the second-stage sieve plate 370, and the third-stage sieve plate 380. The smallest particles will be released outward from the discharging head 130, and the remaining coarse particles will be transferred along the inclined surfaces of the first-stage sieve plate 360, the second-stage sieve plate 370, and the third-stage sieve plate 380.

[0039] Example 2: Combining Figures 3 to 5 As shown in the figure, on the basis of Example 1, the feeding mechanism 100 further includes a first baffle 160 movably installed inside the feeding pipe 150 and a discharging head 130 installed at the bottom end of the discharging pipe 120;

[0040] Six evenly distributed notches are formed on the outer wall of the discharging pipe 120, and slag discharging pipes 170 are installed outside the six notches;

[0041] The slag discharge pipe 170 is integrally in an L-shaped structure, and a hopper 180 is fixedly installed at the bottom of the slag discharge pipe 170. The sorting mechanism 300 further includes six second baffles 390, and the width of the second baffle 390 is twice the width of the port of the slag discharge pipe 170, and every two second baffles 390 form a group.

[0042] Preferably, every two horizontally symmetrical slag discharge pipes 170 form a group, and the three groups of slag discharge pipes 170 from top to bottom are used to provide a release channel for the materials remaining on the first-stage sieve tray 360, the second-stage sieve tray 370, and the third-stage sieve tray 380.

[0043] The dehumidification component 200 further includes an energy supply component 210 fixedly installed inside the sealing cover 110, and a heat release pipe 220 is fixedly installed at the bottom of the energy supply component 210, and a plug 230 is installed at the bottom end of the heat release pipe 220.

[0044] Preferably, the energy supply component 210 is fixedly installed inside the sealing cover 110 by welding, and the wire inside the energy supply component 210 is connected to the joint at the top end of the heating coil 240. When the wire on the energy supply component 210 is connected to an external power supply and powered on, the heating coil 240 will continuously release heat energy, and radiate it into the inner cavity of the material discharge pipe 120 through the heat release pipe 220, so as to achieve the purpose of continuously heat-drying the materials during the screening vibration.

[0045] Example 3: In combination with Figure 3 and Figure 5 As shown, in the above embodiment, the sorting mechanism 300 further includes a chassis 310 installed on the top of the sealing cover 110, a motor 320 installed inside the chassis 310, a runner 3201 installed on the transmission shaft inside the chassis 310, a traction plate 3202 movably installed on the runner 3201, and a pull rod 3203 movably installed at the other end of the traction plate 3202;

[0046] The sorting mechanism 300 further includes a rod sleeve 330 fixedly installed inside the sealing cover 110, and the pull rod 3203 is movably installed inside the rod sleeve 330;

[0047] An outer side pan hopper 3401 is fixedly installed on the outer side of the top of the top sieve tray 340, and an inner side pan hopper 3402 is fixedly installed on the inner side of the top of the top sieve tray 340.

[0048] As the motor 320 rotates forward or backward, its internal transmission shaft will drive the runner 3201, and the runner 3201 will drive the traction plate 3202 to stretch regularly. Finally, the pull rod 3203 limited by the rod sleeve 330 will be driven by traction to drive the top sieve tray 340 to actively loosen the falling materials.

[0049] An outer eight-shaped inclined surface is provided on the inner side of the outer side pan hopper 3401;

[0050] An inner bevel is provided on the outer side of the inner side pan bucket 3402.

[0051] Preferably, the outer side pan bucket 3401 and the inner side pan bucket 3402 are used to guide the falling materials, avoid the accumulation of materials on the top surface of the top sieve pan 340, and at the same time reduce the interference to the airflow of the blown materials.

[0052] The first-stage sieve pan 360, the second-stage sieve pan 370, and the third-stage sieve pan 380 are all in a funnel-shaped structure, and the diameter widths of the mesh holes on the inclined surfaces of the first-stage sieve pan 360, the second-stage sieve pan 370, and the third-stage sieve pan 380 gradually decrease.

[0053] Preferably, the mesh holes with different diameter widths in the first-stage sieve pan 360, the second-stage sieve pan 370, and the third-stage sieve pan 380 are used to classify and screen the uneven particles in the materials. The smallest particles will enter the inner cavity of the discharge head 130 through the mesh holes of the third-stage sieve pan 380 and are finally released outward, while the coarse particles remaining on the inclined surfaces of the first-stage sieve pan 360, the second-stage sieve pan 370, and the third-stage sieve pan 380 will be released outward from the corresponding slag discharge pipes 170 during the regular vibration process.

[0054] The working principle and usage process of the present utility model: First, pull out the first baffle 160 outward, then use the feed pipe 150 to input the materials into the inner cavity of the sealing cover 110, and the materials passing through the inner cavity of the sealing cover 110 will be transferred to directly above the top sieve pan 340. When the input amount of the materials is sufficient, insert the first baffle 160 back into the inside of the feed pipe 150, and then start the motor 320;

[0055] As the motor 320 operates, the internal transmission shaft drives the runner 3201 to rotate, and the traction plate 3202 movably installed on the outer side of the runner 3201 at a position deviating from the center of the circle will extend eccentrically. Finally, the pull rod 3203 will be pulled to reciprocate up and down along the inside of the rod sleeve 330. At this time, the top sieve pan 340 will vibrate and screen the materials directly above it;

[0056] At the same time, connect an external air duct to the air duct 140. As the air duct 140 continuously inputs air into the inner cavities of the sealing cover 110 and the discharge pipe 120, the particulate materials screened out by the top sieve pan 340 will fall downward, and the downward falling particulate materials will successively pass through the sieve holes of the first-stage sieve pan 360, the second-stage sieve pan 370, and the third-stage sieve pan 380, so as to screen the particles of different sizes in the materials;

[0057] With the vibration of the top sieve tray 340, the two stability-enhancing wing plates 350 installed on both sides of the top sieve tray 340 will also drive the first-stage sieve tray 360, the second-stage sieve tray 370, and the third-stage sieve tray 380 to lift and lower at the same speed. Moreover, multiple second baffles 390 arranged outside the first-stage sieve tray 360, the second-stage sieve tray 370, and the third-stage sieve tray 380 will also vibrate accordingly. Finally, the particulate matter that has been sieved and remains on the tops of the first-stage sieve tray 360, the second-stage sieve tray 370, and the third-stage sieve tray 380 can be transferred towards the inner ends of the multiple hoppers 180. And under the continuous blowing action of the air flow, the different particle-sized materials after screening can be classified and sorted.

[0058] While the material is being sieved and vibrated, the air flow blows the sieved material through the heated cavity inside the discharge pipe 120. After the heating coil 240 is energized and releases heat, the heat release pipe 220 will radiate the heat energy generated by the heating coil 240 into the inner cavity of the discharge pipe 120, thereby dehumidifying and sorting the material after classification and screening.

[0059] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A device for grading and screening particle sizes of positive electrode materials for lithium batteries, comprising a feeding mechanism (100), characterized in that: It also includes a dehumidification component (200) arranged in the feeding mechanism (100) and a sorting mechanism (300) arranged in the feeding mechanism (100); The feeding mechanism (100) comprises a sealing cover (110), an air duct (140) arranged on one side of the sealing cover (110), a feeding pipe (150) arranged on the other side of the sealing cover (110), and a discharge pipe (120) installed at the bottom of the sealing cover (110); The dehumidification component (200) comprises a heat release pipe (220) arranged in the middle of the inner cavity of the discharge pipe (120) and a heating coil (240) arranged inside the heat release pipe (220); The sorting mechanism (300) comprises a top sieve plate (340) movably mounted in the inner cavity of the discharge pipe (120), two stabilizing wing plates (350) mounted on both sides of the top sieve plate (340), a first-stage sieve plate (360), a second-stage sieve plate (370), and a third-stage sieve plate (380) fixedly mounted between the two stabilizing wing plates (350) and distributed at equal intervals.

2. A lithium battery positive electrode material particle size classification and screening device according to claim 1, characterized in that: The feeding mechanism (100) further comprises a first baffle (160) movably mounted inside the feeding pipe (150) and a discharge head (130) mounted at the bottom end of the discharge pipe (120); The outer wall of the discharge pipe (120) is provided with six evenly distributed notches, and a slag discharge pipe (170) is installed outside the six notches; The slag discharge pipe (170) is an L-shaped structure as a whole, and a hopper (180) is fixedly mounted on the bottom of the slag discharge pipe (170).

3. A lithium battery positive electrode material particle size classification and screening device according to claim 1, characterized in that: The dehumidification component (200) further comprises an energy supply component (210) fixedly mounted inside the sealing cover (110), and a heat release pipe (220) fixedly mounted at the bottom of the energy supply component (210), with a plug (230) being mounted at the bottom end of the heat release pipe (220).

4. A lithium battery positive electrode material particle size classification and screening device according to claim 1, characterized in that: The sorting mechanism (300) further comprises a chassis (310) mounted on the top of the sealing cover (110), a motor (320) mounted inside the chassis (310), a rotating wheel (3201) mounted on a transmission shaft inside the chassis (310), a traction plate (3202) movably mounted on the rotating wheel (3201), and a pull rod (3203) movably mounted on the other end of the traction plate (3202); The sorting mechanism (300) further comprises a rod sleeve (330) fixedly mounted inside the sealing cover (110), and a pull rod (3203) movably mounted inside the rod sleeve (330).

5. The device for grading and screening particle size of positive electrode materials for lithium batteries according to claim 1, characterized in that: An outer disc bucket (3401) is fixedly mounted on the outer side of the top of the top sieve disc (340), and an inner disc bucket (3402) is fixedly mounted on the inner side of the top of the top sieve disc (340); The inner side of the outer disc bucket (3401) is provided with an outer eight-shaped inclined surface; The outer side of the inner side disc (3402) is provided with an inner eight-shaped inclined surface.

6. A lithium battery positive electrode material particle size classification and screening device according to claim 1, characterized in that: The sorting mechanism (300) further comprises six second baffles (390), wherein the width of the second baffles (390) is twice the width of the port of the slag discharge pipe (170), and every two second baffles (390) form a group.

7. A lithium battery positive electrode material particle size classification and screening device according to claim 1, characterized in that: The first-stage sieve plate (360), the second-stage sieve plate (370) and the third-stage sieve plate (380) are all funnel-shaped structures, and the diameter width of the mesh holes on the inclined surfaces of the first-stage sieve plate (360), the second-stage sieve plate (370) and the third-stage sieve plate (380) gradually decreases.

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