Material gradient fibrosis device of dry-method electrode

Abstract

The utility model discloses a material gradient fibrosis device for a dry-method electrode, and relates to the field of battery pole piece preparation. A material gradient fiberizing device of a dry method electrode comprises a material mixing tank provided with a feeding port, and further comprises a rotating shaft arranged in the material mixing tank and rotationally connected with the upper end of the material mixing tank, and a material conveying device arranged in the material mixing tank, the multiple groups of shifting plates are arranged in an arc shape and are connected to the rotating shaft at equal intervals; according to the utility model, the flowing track of the material in the tank becomes extremely complex and variable, is not limited to single circular motion, and forms strong convection and mixing in a three-dimensional space, so that the materials such as an active substance, a binder and a conductive agent can be more fully contacted, collided and diffused in a complex flowing state; and the mixing uniformity and effect are greatly improved, so that an ideal material mixing basis is provided for the subsequent fibration process, and the quality and performance of the subsequently prepared battery pole piece are further improved.

Description

Technical Field

[0001] This utility model belongs to the field of battery electrode preparation technology, specifically, it relates to a material gradient fiberization device for dry electrode. Background Technology

[0002] In the dry electrode preparation process, uniform mixing of materials is the core element to ensure the smooth progress of the subsequent fiberization reaction and improve the quality and performance of the battery electrode. Only when the materials are highly uniformly mixed can the fiberization reaction be fully carried out in an ideal environment to generate a stable and uniform fiber structure. The high-quality fiber structure has a crucial impact on enhancing the conductivity of the battery electrode and improving its stability during charging and discharging.

[0003] Currently, the industry generally uses traditional material mixing devices. These devices have relatively simple structures, and the mixing tank is mostly equipped with ordinary stirring blades. The mixing of materials is achieved by the motor driving the blades to rotate in a circular motion. When key materials such as active materials, binders, and conductive agents are put into the mixing tank through the feeding port, they can only perform a single-mode circular motion around the stirring shaft under the action of the circular stirring force generated by the blades. This severely limits the full contact and mixing between materials, making it impossible to provide a suitable material basis for the subsequent fiberization reaction. This directly leads to a significant reduction in the fiberization effect, and the final battery electrode sheets produced exhibit significant inconsistencies in performance. In view of this, this utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a material gradient fiberization device for dry electrode that can overcome or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] A material gradient fiberization device for a dry electrode includes a mixing tank with a feeding port, and further includes: a rotating shaft disposed inside the mixing tank and rotatably connected to the upper end of the mixing tank; multiple sets of arc-shaped deflectors equidistantly connected to the rotating shaft, wherein each set of deflectors is circumferentially distributed on the outer wall of the rotating shaft, and a connecting rod is fixedly connected to the deflector, the connecting rod being rotatably connected to the rotating shaft; the deflector angle is continuously changed by the connecting rod as the rotating shaft rotates; a hollow cavity is formed between the inner and outer walls of the lower end of the mixing tank, and multiple air nozzles communicating with the hollow cavity are equidistantly arranged on the circumference of the inner wall of the lower end of the mixing tank; and a second gas supply pipe communicating with the hollow cavity and used for supplying gas into the hollow cavity from an external gas source.

[0007] To drive the rotating shaft to rotate, a motor is fixedly installed on the mixing tank, and a second gear is fixedly installed at one end of the rotating shaft that passes through the upper end of the mixing tank. A first gear that meshes with the second gear is fixedly connected to the output end of the motor.

[0008] To further facilitate the delivery of gas into the hollow cavity, the mixing tank is symmetrically and fixedly connected with piston cylinders, a piston disc is slidably connected inside the piston cylinders, a piston rod is fixedly connected to the piston disc, a connecting seat is vertically connected to the mixing tank, the piston rod is fixedly connected to the connecting seat, and a gas delivery pipe is fixedly connected to the mixing tank. The end of the gas delivery pipe away from the hollow cavity is connected to the mixing tank.

[0009] To further drive the piston disc to slide back and forth inside the piston cylinder, a reciprocating screw is rotatably connected to the mixing tank. A gear three that meshes with gear two is fixedly installed on the reciprocating screw. The rotating shaft is hollow, and a guide rod is slidably connected inside the cavity of the rotating shaft. One end of the guide rod passes through the upper end of the rotating shaft and is rotatably connected to a connecting seat. The connecting seat is threaded onto the reciprocating screw.

[0010] In order to drive the connecting rod to rotate the dial plate and continuously change the angle at which the dial plate moves the material, a rack is fixedly connected to the guide rod, and a gear four that meshes with the rack is fixedly installed on one end of the connecting rod that passes through the cavity of the rotating shaft.

[0011] To enable the material to circulate from bottom to top within the mixing tank, a conveying chamber is further provided between the inner and outer walls of the mixing tank. Multiple branch pipes connected to the conveying chamber are equidistantly arranged on the inner wall of the mixing tank. A pump is fixedly installed on the mixing tank. The input end of the pump is connected to the mixing tank through conveying pipe one, and the output end is connected to the conveying chamber through conveying pipe two.

[0012] In order to filter the gas entering the piston cylinder through the gas supply pipe, a dustproof screen is further installed inside the gas supply pipe, and the diameter of the air inlet end of the jet nozzle is larger than the diameter of the air outlet end.

[0013] To facilitate the removal of the uniformly mixed material from the mixing tank, a discharge pipe is fixedly connected to the bottom of the mixing tank, and a solenoid valve is installed on the discharge pipe.

[0014] To further reduce material residue in the mixing tank, the lower end of the mixing tank is tapered.

[0015] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0016] This invention makes the flow trajectory of materials in the tank extremely complex and varied, no longer limited to a single circular motion, but forming strong convection and mixing in three-dimensional space. This allows active materials, binders, and conductive agents to come into more full contact, collide and diffuse with each other under complex flow conditions, greatly improving the uniformity and effect of mixing. This provides an ideal material mixing basis for the subsequent fiberization process, thereby improving the quality and performance of the battery electrode sheets produced later.

[0017] By circulating the materials from bottom to top within the mixing tank, uneven local material concentration is avoided, ensuring full contact between active materials, binders, and conductive agents. This significantly improves the uniformity of material mixing, providing an ideal foundation for the subsequent fiberization process and further enhancing the quality and performance of the battery electrodes produced. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the mixing tank and piston cylinder of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0020] Figure 3 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0021] Figure 4 This is a partial structural schematic diagram of the present invention;

[0022] Figure 5 This is a cross-sectional view of the mixing tank and rotating shaft of this utility model;

[0023] Figure 6 This is a utility model Figure 1 Enlarged view of section A;

[0024] Figure 7 This is a utility model Figure 4 Enlarged view of section B;

[0025] Figure 8 This is a utility model Figure 5 Enlarged view of section C.

[0026] In the diagram: 1. Mixing tank; 101. Discharge pipe; 2. Rotating shaft; 201. Connecting rod; 202. Paddle plate; 203. Motor; 204. Gear 1; 205. Gear 2; 3. Reciprocating screw; 301. Gear 3; 302. Connecting seat; 303. Guide rod; 304. Gear 4; 305. Rack; 4. Hollow cavity; 401. Air nozzle; 402. Piston cylinder; 403. Piston disc; 404. Piston rod; 405. Air supply pipe 1; 406. Air supply pipe 2; 5. Pump; 501. Material supply pipe 1; 502. Material supply pipe 2; 503. Material supply chamber; 504. Branch pipe. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0028] Example 1:

[0029] Reference Figures 1-8 A material gradient fiberization device for a dry electrode includes a mixing tank 1 with a feeding port, and further includes: a rotating shaft 2, which is disposed inside the mixing tank 1 and rotatably connected to the upper end of the mixing tank 1; multiple sets of arc-shaped deflectors 202, equidistantly connected to the rotating shaft 2, wherein each set of deflectors 202 is circumferentially distributed on the outer wall of the rotating shaft 2, and a connecting rod 201 is fixedly connected to the deflector 202, which is rotatably connected to the rotating shaft 2. The deflector 202 continuously changes its deflection angle through the connecting rod 201 as the rotating shaft 2 rotates; a hollow cavity 4 is formed between the inner and outer walls of the lower end of the mixing tank 1, and multiple air nozzles 401 connected to the hollow cavity 4 are circumferentially arranged on the inner wall of the lower end of the mixing tank 1; and a gas supply pipe 406, which is connected to the hollow cavity 4 and is used to supply gas into the hollow cavity 4 from an external gas source.

[0030] A motor 203 is fixedly installed on the mixing tank 1. A gear 205 is fixedly installed at one end of the rotating shaft 2 that passes through the upper end of the mixing tank 1. A gear 204 that meshes with the gear 205 is fixedly connected to the output end of the motor 203.

[0031] A piston cylinder 402 is symmetrically and fixedly connected to the mixing tank 1. A piston disc 403 is slidably connected inside the piston cylinder 402. A piston rod 404 is fixedly connected to the piston disc 403. A connecting seat 302 is lifted and lowered on the mixing tank 1. The piston rod 404 is fixedly connected to the connecting seat 302. A first gas supply pipe 405 is fixedly connected to the mixing tank 1. The end of the second gas supply pipe 406 away from the hollow cavity 4 is connected to the mixing tank 1.

[0032] A reciprocating screw 3 is rotatably connected to the mixing tank 1. A gear 301 that meshes with gear 205 is fixedly installed on the reciprocating screw 3. The rotating shaft 2 is hollow. A guide rod 303 is slidably connected in the cavity of the rotating shaft 2. One end of the guide rod 303 passes through the upper end of the rotating shaft 2 and is rotatably connected to the connecting seat 302. The connecting seat 302 is threadedly connected to the reciprocating screw 3.

[0033] A rack 305 is fixedly connected to the guide rod 303, and a gear 304 that meshes with the rack 305 is fixedly installed on one end of the connecting rod 201 that passes through the cavity of the rotating shaft 2.

[0034] A dustproof net is installed inside the air supply pipe 405, and the diameter of the air inlet end of the air nozzle 401 is larger than the diameter of the air outlet end.

[0035] When using, first place the mixing tank 1 in a suitable working position, and add the pre-fiberized active material A, binder B and conductive agent C into the tank through the feeding port on the mixing tank 1.

[0036] After the above preparations are completed, the motor 203 is turned on. The output end of the motor 203 drives the gear 1 204 to rotate. Since the gear 1 204 meshes with the gear 2 205, the gear 2 205 rotates accordingly, which in turn drives the rotating shaft 2 fixedly connected to the gear 2 205 to rotate. The rotating shaft 2 is connected to multiple sets of arc-shaped baffles 202. As the rotating shaft 2 rotates, the baffles 202 stir the material in the tank. At the same time, during the stirring process, the arc-shaped baffles 202 can more effectively promote the flow of material. Compared with the planar structure, it can reduce the jamming and accumulation of material on the surface of the baffles 202, so that the material initially forms a relatively smooth circumferential flow in the tank, promoting the initial mixing between different materials.

[0037] As the rotating shaft 2 rotates, the gear 301 meshing with it drives the reciprocating screw 3 to rotate. The connecting seat 302 is threaded onto the reciprocating screw 3. Driven by the reciprocating screw 3, the connecting seat 302 moves up and down on the mixing tank 1. Since the connecting seat 302 is connected to the piston disc 403 through the piston rod 404, the piston disc 403 will slide back and forth in the piston cylinder 402 along with the connecting seat 302. When the piston disc 403 slides upward, the space inside the piston cylinder 402 increases and the air pressure decreases. External gas is drawn into the piston cylinder 402 through the gas supply pipe 405. The dust filter inside the gas supply pipe 405 can effectively filter out impurities in the gas, ensuring the gas enters the piston cylinder 402. The gas inside the piston cylinder 402 is cleaned to prevent impurities from affecting the normal operation of the device. When the piston disc 403 moves downward, the piston disc 403 compresses the gas inside the piston cylinder 402. After the gas is compressed, the pressure increases and it is transported into the hollow cavity 4 through the gas delivery pipe 406. Finally, it is ejected from the jet nozzles 401 that are equidistantly arranged on the inner wall of the lower end of the mixing tank 1. This causes the gas to disturb and push the material at the bottom of the mixing tank 1 upward. At the same time, since the diameter of the air inlet end of the jet nozzle 401 is larger than the diameter of the air outlet end, the ejected gas forms a high-speed airflow, which can generate strong disturbance and upward push on the material at the bottom of the tank, causing the material to form a complex and varied flow trajectory inside the tank.

[0038] Meanwhile, the reciprocating motion of the connecting seat 302 drives the guide rod 303 to slide within the cavity of the rotating shaft 2. The rack 305 fixedly connected to the guide rod 303 meshes with the gear 4 304 at one end of the connecting rod 201 that passes through the cavity of the rotating shaft 2. As the guide rod 303 slides, the gear 4 304 rotates, driving the connecting rod 201 to rotate, thereby continuously changing the turning angle of the dial 202. Combined with the high-speed airflow ejected from the jet nozzle 401, the flow trajectory of the material in the tank becomes extremely complex and variable, no longer limited to a single circular motion, but forming strong convection and mixing in three-dimensional space. This allows the active material, binder, and conductive agent to come into more full contact, collide, and diffuse under complex flow conditions, greatly improving the uniformity and effect of mixing. This provides an ideal material mixing basis for the subsequent fiberization process, thereby improving the quality and performance of the battery electrode sheets produced later.

[0039] It should be noted that both gas pipeline 405 and gas pipeline 406 are equipped with one-way valves.

[0040] Example 2:

[0041] Reference Figure 1 , Figure 2 , Figure 5A material gradient fiberization device for dry electrode is basically the same as in Example 1. Furthermore, a conveying chamber 503 is provided between the inner and outer walls of the mixing tank 1. Multiple branch pipes 504 connected to the conveying chamber 503 are equidistantly arranged on the inner wall of the mixing tank 1. A pump 5 is fixedly installed on the mixing tank 1. The input end of the pump 5 is connected to the mixing tank 1 through a first conveying pipe 501, and the output end is connected to the conveying chamber 503 through a second conveying pipe 502.

[0042] During the material mixing process, the pump 5 is started. The pump 5 extracts the material from the bottom of the mixing tank 1 through the first conveying pipe 501, and then conveys the material into the conveying chamber 503 through the second conveying pipe 502. Finally, the material is discharged through multiple circumferentially distributed branch pipes 504 and redistributed into the mixing tank 1 to participate in the mixing. This achieves the bottom-up circulation of the material in the mixing tank 1, avoiding uneven local material concentration, and ensuring that the active material, binder, and conductive agent are in full contact. This greatly improves the uniformity of material mixing, providing an ideal material mixing basis for the subsequent fiberization process, and further improving the quality and performance of the battery electrode sheets produced.

[0043] Example 3:

[0044] Reference Figure 5 A material gradient fiberization device for a dry electrode is basically the same as that in Example 1. Furthermore, the bottom of the mixing tank 1 is fixedly connected to a discharge pipe 101, and a solenoid valve is provided on the discharge pipe 101.

[0045] The inner wall of the lower end of the mixing tank 1 is tapered.

[0046] Once the material mixture reaches the expected uniformity and degree of fiberization, the discharge preparation work is initiated. The operator confirms that the downstream equipment connected to the discharge pipe 101, such as the conveying device and the forming equipment, is ready to receive the material. At this time, the solenoid valve on the discharge pipe 101 is opened, and the mixed material in the mixing tank 1 is quickly and smoothly discharged through the discharge pipe 101 under its own gravity and the guidance of the conical inner wall. Because the conical inner wall concentrates and guides the material to the discharge pipe 101, it reduces the material residue at the bottom of the tank, allowing the material to be discharged from the discharge pipe 101 efficiently.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model.

Claims

1. A material gradient fiberization device of dry-process electrode, comprising a mixing tank (1), a feeding opening is formed on the mixing tank (1), characterized in that, Also include: The rotating shaft (2) is arranged in the mixing tank (1), and the upper end of the mixing tank (1) is rotatably connected; A plurality of arc-shaped push plates (202) are equidistantly connected to the rotating shaft (2), Wherein, each group of push plates (202) are circumferentially equidistantly distributed on the outer wall of the rotating shaft (2), the push plates (202) are fixedly connected with connecting rods (201), the connecting rods (201) are rotatably connected with the rotating shaft (2), the push plates (202) constantly change the pushing angle through the connecting rods (201) with the rotation of the rotating shaft (2), a hollow cavity (4) is arranged between the inner and outer walls of the lower end of the mixing tank (1), and a plurality of jet nozzles (401) are circumferentially equidistantly arranged on the inner wall of the lower end of the mixing tank (1) and are in communication with the hollow cavity (4). The gas pipe two (406) is in communication with the hollow cavity (4) and is used for connecting a gas source to deliver gas into the hollow cavity (4).

2. A material gradient fiberization apparatus for dry electrodes as defined in claim 1, wherein, The mixing tank (1) is fixedly connected with a motor (203), one end of the rotating shaft (2) penetrating through the upper end of the mixing tank (1) is fixedly connected with a gear two (205), and the output end of the motor (203) is fixedly connected with a gear one (204) meshing with the gear two (205).

3. A material gradient fiberization apparatus for dry electrodes as defined in claim 2, wherein, The mixing tank (1) is fixedly connected with a piston cylinder (402), the piston cylinder (402) is slidably connected with a piston disc (403), the piston disc (403) is fixedly connected with a piston rod (404), the mixing tank (1) is connected with a connecting seat (302) in an up-down manner, the piston rod (404) is fixedly connected with the connecting seat (302), the mixing tank (1) is fixedly connected with a gas pipe one (405), and one end of the gas pipe two (406) away from the hollow cavity (4) is in communication with the mixing tank (1).

4. A material gradient fiberization apparatus for dry electrodes as defined in claim 3, wherein, The mixing tank (1) is rotatably connected with a reciprocating screw rod (3), the reciprocating screw rod (3) is fixedly connected with a gear three (301) meshing with the gear two (205), the rotating shaft (2) is hollow, a guide rod (303) is slidably connected in the cavity of the rotating shaft (2), one end of the guide rod (303) penetrating through the upper end of the rotating shaft (2) is rotatably connected with the connecting seat (302), and the connecting seat (302) is threadedly connected with the reciprocating screw rod (3).

5. A material gradient fiberization apparatus for dry electrodes as defined in claim 4, wherein, The guide rod (303) is fixedly connected with a rack (305), and one end of the connecting rod (201) penetrating through the cavity of the rotating shaft (2) is fixedly connected with a gear four (304) meshing with the rack (305).

6. A material gradient fiberization apparatus for dry electrodes as defined in claim 1, wherein, A material conveying cavity (503) is arranged between the inner and outer walls of the mixing tank (1), a plurality of branch pipes (504) are circumferentially equidistantly arranged on the inner wall of the mixing tank (1) and are in communication with the material conveying cavity (503), and a material pumping pump (5) is fixedly connected with the mixing tank (1). The input end of the material pumping pump (5) is in communication with the mixing tank (1) through a material conveying pipe one (501), and the output end of the material pumping pump (5) is in communication with the material conveying cavity (503) through a material conveying pipe two (502).

7. A material gradient fiberization apparatus for dry electrodes as defined in claim 3, wherein, The air inlet end of the air jet nozzle (401) is larger in diameter than the air outlet end.

8. A material gradient fiberization apparatus for dry electrodes as defined in claim 1, wherein, The bottom of the mixing tank (1) is fixedly connected with a discharge pipe (101), and an electromagnetic valve is arranged on the discharge pipe (101).

9. A material gradient fiberization apparatus for dry electrodes as defined in claim 8, wherein, The inner wall of the lower end of the mixing tank (1) is conical.

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