A lithium ion battery single crystal anode material mixing device

Abstract

This utility model discloses a mixing device for single-crystal cathode materials of lithium-ion batteries, relating to the field of lithium-ion battery technology. Addressing the problem in the prior art where the cathode material of lithium-ion batteries is not filtered, resulting in poor mixing of agglomerated raw materials and powdered raw materials, the following solution is proposed: a mixing cylinder and a cylinder cover. The cylinder cover is equipped with a feeding mechanism, which includes a feeding hopper penetrating and fixed to the outer wall of the cylinder cover, a mounting cover bolted to the upper outer wall of the feeding hopper, and a retaining ring welded to the bottom outer wall of the mounting cover. A filtering assembly is provided inside the feeding hopper, comprising a mounting ring slidably fitted inside the feeding hopper, a filter screen embedded in the mounting ring, and a return spring. This utility model can stir and mix the raw materials during feeding, preventing agglomerated raw materials from being directly mixed, ensuring thorough mixing of multiple raw materials and improving the mixing effect.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery technology, and in particular to a mixing device for single-crystal cathode materials of lithium-ion batteries. Background Technology

[0002] A lithium-ion battery is a secondary battery system that uses two different lithium intercalation compounds that can reversibly insert and extract lithium ions as the positive and negative electrodes, respectively. In the production process of lithium-ion batteries, it is necessary to mix various positive electrode raw materials.

[0003] A search revealed a Chinese patent (application number "201720626854.X") disclosing "a positive electrode mixing device for lithium-ion battery production." This mixing device includes a base with a support leg fixedly installed at its bottom. A support plate is movably connected to the end of the support leg away from the base via a rotating shaft. A housing is fixedly installed on the top of the base. A discharge pipe is connected to the right side of the housing, and a feed pipe is connected to the left side of the housing. A feed hopper is connected to the side of the feed pipe away from the housing. A screw is inserted through the top of the feed pipe, with one end of the screw near the top of the feed pipe extending into the interior of the feed pipe. A turntable is fixedly installed at the end of the screw outside the feed pipe. However, during use, this mixing device does not filter the positive electrode material of the lithium-ion battery, resulting in clumped raw materials in the powder material not being fully mixed with the various raw materials, leading to poor mixing performance. Utility Model Content

[0004] This invention provides a mixing device for single-crystal cathode materials of lithium-ion batteries, which solves the problem proposed in the prior art that the mixing device does not filter the cathode material of lithium-ion batteries when stirring and mixing the raw materials, resulting in poor mixing effect due to the inability of agglomerated raw materials in the powder to be fully mixed with various raw materials.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A mixing device for single-crystal cathode materials for lithium-ion batteries includes a mixing cylinder and a cylinder cover. The cylinder cover is equipped with a feeding mechanism, which includes a feeding hopper extending through and fixed to the outer wall of the cylinder cover, a mounting cover bolted to the upper outer wall of the feeding hopper, and a retaining ring welded to the bottom outer wall of the mounting cover. A filtering assembly is provided inside the feeding hopper. The filtering assembly includes a mounting ring slidably fitted inside the feeding hopper, a filter screen embedded in the mounting ring, a return spring fitted inside the feeding hopper, and four transmission rods with hemispherical bottom ends. A vibration assembly is provided in the middle of the feeding hopper. The mixing cylinder includes a mounting ring connected to the inner wall of the feed hopper via a bearing, a compression ring connected to the outer wall of the top of the mounting ring via bolts, a gear ring connected to the outer wall of the mounting ring via a pin, a drive motor, and a drive gear that meshes with the gear ring to form a transmission engagement. The mixing cylinder is equipped with a stirring assembly, which includes a mounting rod with a limit groove on its upper outer wall, several stirring blades respectively fixed to the lower outer wall of the mounting rod, a driven gear that meshes with the drive gear to form a transmission engagement, a connecting plate rotatably installed in the limit groove, and a screw rod that passes through and is screwed to the outer wall of the connecting plate.

[0007] Preferably, a discharge pipe is fixedly provided on the inner wall of the bottom of the mixing cylinder, and a discharge valve is connected to the outer wall of the lower part of the discharge pipe via a flange. The cylinder cover is bolted to the outer wall of the top of the mixing cylinder.

[0008] Preferably, a mounting bracket is welded to the top outer wall of the cylinder cover, and the feed hopper passes through and is fixed to the outer wall of the mounting bracket. A cover plate is hinged to the upper outer wall of the mounting cover.

[0009] Preferably, the bottom end of the reset spring abuts against the top outer wall of the mounting ring, and the top end of the reset spring abuts against the bottom outer wall of the mounting cover. The four transmission rods are respectively screwed onto the bottom outer wall of the mounting ring, and the four transmission rods respectively pass through and slide on the middle outer wall of the feed hopper.

[0010] Preferably, the upper outer wall of the extrusion ring has several uneven extrusion grooves, and the bottom ends of the four transmission rods respectively abut against the extrusion grooves. The transmission motor is bolted to the inner wall of the top of the mounting bracket, and the drive gear is splined to the upper outer wall of the output shaft of the transmission motor.

[0011] The above scheme uses the output shaft of the drive motor to rotate, which in turn drives the drive gear to rotate. The drive gear then drives the gear ring, mounting ring, and extrusion ring to rotate. The extrusion groove on the extrusion ring extrudes the four drive rods, causing them to move up and down and extrude the return spring. Under the tension of the return spring, the mounting ring and filter screen move up and down, thus vibrating and filtering the raw materials.

[0012] Preferably, the upper part of the mounting rod passes through and is rotatably mounted on the outer wall of the cylinder cover and the mounting bracket, respectively, and the driven gear is connected to the upper outer wall of the mounting rod through a pin. The upper part of the screw passes through and is connected to the outer wall of the mounting bracket through a bearing, and the bottom end of the screw is connected to the top outer wall of the cylinder cover through a bearing.

[0013] The above scheme uses a drive gear to drive a driven gear and a mounting rod to rotate. The mounting rod drives multiple stirring blades to rotate, and the stirring blades stir and mix the raw materials in the mixing drum. The output shaft of the drive motor stops rotating, and the screw rotates. The screw drives the connecting plate and the mounting rod to rise, so that the stirring blades are disengaged from the discharge pipe at the bottom of the mixing drum. The mixed raw materials can then be discharged by opening the discharge valve.

[0014] The beneficial effects of this utility model are as follows:

[0015] The output shaft of the drive motor rotates, which drives the drive gear to rotate. The drive gear drives the gear ring, mounting ring, and extrusion ring to rotate. The extrusion groove on the extrusion ring extrudes the four drive rods, causing them to move up and down and extrude the return spring. Under the tension of the return spring, the mounting ring and filter screen move up and down, vibrating and filtering the raw materials. This process can stir and mix the raw materials during feeding, preventing clumped raw materials from being directly mixed, and ensuring that multiple raw materials are fully mixed, thus improving the mixing effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall main structure of a mixing device for single-crystal cathode materials of lithium-ion batteries proposed in this utility model.

[0017] Figure 2 This is a front view of the feeding mechanism of a lithium-ion battery single-crystal cathode material mixing device proposed in this utility model.

[0018] Figure 3 This is a schematic diagram of the main structure of the filter component of a mixing device for single-crystal cathode materials of lithium-ion batteries proposed in this utility model.

[0019] Figure 4 This is a schematic diagram of the main structure of the vibration component of a mixing device for single-crystal cathode materials of lithium-ion batteries proposed in this utility model.

[0020] Figure 5 This is a schematic diagram of the main structure of the stirring assembly of a mixing device for a single-crystal cathode material of a lithium-ion battery proposed in this utility model.

[0021] In the diagram: 1. Mixing cylinder; 2. Cylinder cover; 3. Feeding mechanism; 301. Mounting bracket; 302. Feed hopper; 303. Mounting cover; 304. Retaining ring; 305. Cover plate; 4. Filter assembly; 401. Mounting ring; 402. Filter screen; 403. Return spring; 404. Transmission rod; 5. Vibration assembly; 501. Mounting ring; 502. Extrusion ring; 503. Gear ring; 504. Transmission motor; 505. Drive gear; 6. Stirring assembly; 601. Mounting rod; 602. Stirring blade; 603. Driven gear; 604. Connecting plate; 605. Screw. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Example 1, referring to Figure 1-4A mixing device for single-crystal cathode materials for lithium-ion batteries includes a mixing cylinder 1 with a discharge pipe fixed to its bottom inner wall and a cylinder cover 2. A discharge valve is connected to the lower outer wall of the discharge pipe via a flange. The cylinder cover 2 is bolted to the top outer wall of the mixing cylinder 1. The cylinder cover 2 is provided with a feeding mechanism 3, which includes a feeding hopper 302 that penetrates and is fixed to the outer wall of the cylinder cover 2, a mounting cover 303 bolted to the upper outer wall of the feeding hopper 302, and a retaining ring 3 welded to the bottom outer wall of the mounting cover 303. 04. A mounting bracket 301 is welded to the top outer wall of the cylinder cover 2. The feed hopper 302 passes through and is fixed to the outer wall of the mounting bracket 301. A cover plate 305 is hinged to the upper outer wall of the mounting cover 303. A filter assembly 4 is provided inside the feed hopper 302. The filter assembly 4 includes a mounting ring 401 slidably sleeved in the feed hopper 302, a filter screen 402 embedded in the mounting ring 401, a return spring 403 sleeved in the feed hopper 302, and four transmission rods 404 with hemispherical bottom ends. The return spring 403... The bottom end of the 3-pin abuts against the top outer wall of the mounting ring 401, and the top end of the return spring 403 abuts against the bottom outer wall of the mounting cover 303. Four transmission rods 404 are respectively screwed onto the bottom outer wall of the mounting ring 401. The four transmission rods 404 pass through and slide on the middle outer wall of the feed hopper 302. A vibration assembly 5 is provided in the middle of the feed hopper 302. The vibration assembly 5 includes a mounting ring 501 connected to the inner wall of the middle of the feed hopper 302 via bearings, and a top outer wall connected to the mounting ring 501 via bolts. The device consists of a compression ring 502, a toothed ring 503 connected to the outer wall of the mounting ring 501 via a pin, a drive motor 504, and a drive gear 505 that meshes with the toothed ring 503 to form a transmission engagement. The upper outer wall of the compression ring 502 has several uneven compression grooves. The bottom ends of four drive rods 404 abut against the compression grooves respectively. The drive motor 504 is bolted to the top inner wall of the mounting bracket 301. The drive gear 505 is splined to the upper outer wall of the output shaft of the drive motor 504.

[0024] Example 2, refer to Figure 5 A mixing device for single-crystal cathode material of lithium-ion battery, further comprising a stirring assembly 6, the stirring assembly 6 comprising a mounting rod 601 with a limiting groove on its upper outer wall, several stirring blades 602 respectively fixed on the lower outer wall of the mounting rod 601, a driven gear 603 meshing with the driving gear 505 to form a transmission engagement, a connecting plate 604 rotatably mounted in the limiting groove, and a screw 605 penetrating and screwed to the outer wall of the connecting plate 604. The upper part of the mounting rod 601 is respectively penetrating and rotatably mounted on the outer wall of the cylinder cover 2 and the mounting frame 301. The driven gear 603 is connected to the upper outer wall of the mounting rod 601 by a pin. The upper part of the screw 605 is penetrating and connected to the outer wall of the mounting frame 301 by a bearing. The bottom end of the screw 605 is connected to the top outer wall of the cylinder cover 2 by a bearing.

[0025] Working principle: The output shaft of the drive motor 504 rotates, driving the mounting ring 501 and the extrusion ring 502 to rotate. The extrusion groove on the extrusion ring 502 extrudes the four drive rods 404, causing the four drive rods 404 to move up and down, and extruding the return spring 403. Under the tension of the return spring 403, the mounting ring 401 and the filter screen 402 move up and down, vibrating and filtering the raw materials. The drive gear 505 drives the driven gear 603 and the mounting rod 601 to rotate. The mounting rod 601 drives multiple stirring blades 602 to rotate. The stirring blades 602 stir and mix the raw materials in the mixing cylinder 1. The output shaft of the drive motor 504 stops rotating and rotates the screw 605. The screw 605 drives the connecting plate 604 and the mounting rod 601 to rise, causing the stirring blades 602 to detach from the discharge pipe at the bottom of the mixing cylinder 1. The discharge valve is then opened to discharge the mixed raw materials.

[0026] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A mixing device for single-crystal cathode materials of lithium-ion batteries, comprising a mixing cylinder (1) and a cylinder cover (2), characterized in that, The cylinder cover (2) is provided with a feeding mechanism (3), which includes a feeding hopper (302) that penetrates and is fixed to the outer wall of the cylinder cover (2), a mounting cover (303) that is bolted to the upper outer wall of the feeding hopper (302), and a retaining ring (304) welded to the bottom outer wall of the mounting cover (303). The feed hopper (302) is provided with a filter assembly (4), which includes an installation ring (401) slidably sleeved in the feed hopper (302), a filter screen (402) embedded in the installation ring (401), a return spring (403) sleeved in the feed hopper (302), and four transmission rods (404) with hemispherical structures at the bottom. The feed hopper (302) is provided with a vibration assembly (5) in the middle. The vibration assembly (5) includes a mounting ring (501) connected to the inner wall of the middle part of the feed hopper (302) by a bearing, a compression ring (502) connected to the outer wall of the top of the mounting ring (501) by bolts, a toothed ring (503) connected to the outer wall of the mounting ring (501) by a pin, a drive motor (504), and a drive gear (505) that meshes with the toothed ring (503) to form a transmission engagement. The mixing cylinder (1) is provided with a stirring assembly (6). The stirring assembly (6) includes a mounting rod (601) with a limiting groove on the upper outer wall, several stirring blades (602) respectively fixed on the lower outer wall of the mounting rod (601), a driven gear (603) that meshes with the driving gear (505) to form a transmission cooperation, a connecting plate (604) rotatably installed in the limiting groove, and a screw (605) that passes through and is screwed to the outer wall of the connecting plate (604).

2. The mixing device for single-crystal cathode material of lithium-ion battery according to claim 1, characterized in that, The mixing cylinder (1) is fixedly provided with a discharge pipe on the inner wall at the bottom, and a discharge valve is connected to the outer wall at the lower part of the discharge pipe by a flange. The cylinder cover (2) is connected to the outer wall at the top of the mixing cylinder (1) by bolts.

3. The mixing device for single-crystal cathode material of lithium-ion battery according to claim 1, characterized in that, The top outer wall of the cylinder cover (2) is welded with a mounting bracket (301), and the feed hopper (302) passes through and is fixed on the outer wall of the mounting bracket (301). The upper outer wall of the mounting cover (303) is hinged with a cover plate (305).

4. The mixing device for single-crystal cathode material of lithium-ion battery according to claim 1, characterized in that, The bottom end of the reset spring (403) abuts against the top outer wall of the mounting ring (401), and the top end of the reset spring (403) abuts against the bottom outer wall of the mounting cover (303). The four transmission rods (404) are respectively screwed onto the bottom outer wall of the mounting ring (401), and the four transmission rods (404) respectively pass through and slide on the middle outer wall of the feed hopper (302).

5. A mixing device for single-crystal cathode materials for lithium-ion batteries according to claim 3, characterized in that, The upper outer wall of the extrusion ring (502) has several uneven extrusion grooves, and the bottom ends of the four transmission rods (404) respectively abut against the extrusion grooves. The transmission motor (504) is bolted to the top inner wall of the mounting bracket (301), and the drive gear (505) is splined to the upper outer wall of the output shaft of the transmission motor (504).

6. A mixing device for single-crystal cathode materials for lithium-ion batteries according to claim 3, characterized in that, The upper part of the mounting rod (601) is respectively inserted through and rotatably mounted on the outer wall of the cylinder cover (2) and the mounting bracket (301), and the driven gear (603) is connected to the upper outer wall of the mounting rod (601) through a pin. The upper part of the screw (605) is inserted through and connected to the outer wall of the mounting bracket (301) through a bearing, and the bottom end of the screw (605) is connected to the top outer wall of the cylinder cover (2) through a bearing.

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