Crushing device for lithium battery positive electrode material

Abstract

The utility model relates to the technical field of lithium battery production, and discloses a crushing device for a lithium battery positive electrode material, which comprises a crushing box body, a primary crushing chamber and a secondary crushing chamber are arranged in the crushing box body up and down, a crushing hopper is fixed in the primary crushing chamber, and a plurality of crushing components are arranged in the crushing hopper at intervals along the length direction of the crushing hopper. The crushing assembly comprises a first crushing roller and a second crushing roller which are rotationally arranged, a material stirring plate is arranged in the crushing hopper, the material stirring plate is located above the crushing assembly, the material stirring plate does reciprocating linear motion in the length direction of the crushing hopper, a grinding cylinder is arranged in the secondary crushing chamber, and an upper grinding disc and a lower grinding disc are rotationally arranged in the grinding cylinder; the upper grinding disc has the freedom degree of moving in the axial direction of the lower grinding disc, the bottom of the smashing hopper is connected with the grinding cylinder through the conveying pipeline, the side wall of the grinding cylinder is connected with the discharging pipe, lithium iron phosphate materials are smashed more thoroughly through two-time smashing operation, and the smashing effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a crushing device for lithium battery cathode materials. Background Art

[0002] Lithium battery cathode materials account for a large proportion in lithium ion batteries and play a key role in the performance of lithium ion batteries. The main component material of lithium battery cathode materials is lithium iron phosphate. Lithium iron phosphate has the advantages of large discharge capacity, low price and no environmental pollution. Among them, lithium iron phosphate materials need to be crushed into a powdery structure to meet the processing standards of cathode materials. Therefore, crushing equipment is required to crush lithium iron phosphate during the production process of battery cathode materials. The quality of lithium iron phosphate plays an important role in the use of lithium battery cathode materials. Therefore, the finer the crushing structure of lithium iron phosphate, the higher the quality of the cathode materials. The existing crushers for lithium battery cathode materials use one-time crushing, and the crushing effect is not good. Some materials do not reach the required particle size, which affects the subsequent production quality of lithium batteries. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a crushing device for lithium battery cathode materials to solve the problem of poor crushing effect of the existing crushing device.

[0004] The purpose of the utility model is achieved by the following technical solutions: A crushing device for lithium battery cathode materials, including a crushing box body. An upper-stage crushing chamber and a lower-stage crushing chamber are arranged up and down in the crushing box body. A crushing hopper is fixed in the upper-stage crushing chamber. A plurality of crushing components are arranged at intervals along the length direction of the crushing hopper. Each crushing component includes a first crushing roller and a second crushing roller rotatably arranged. A feeding plate is arranged in the crushing hopper. The feeding plate is located above the crushing components. The feeding plate makes a reciprocating linear motion along the length direction of the crushing hopper. A grinding cylinder is arranged in the lower-stage crushing chamber. An upper grinding disc and a lower grinding disc are rotatably arranged in the grinding cylinder. The upper grinding disc has the freedom to move axially along the lower grinding disc. The bottom of the crushing hopper is connected to the grinding cylinder through a conveying pipeline. The end of the conveying pipeline connected to the grinding cylinder is located above the lower grinding disc. A discharge pipe is connected to the side wall of the grinding cylinder. The discharge pipe is located between the lower grinding disc and the upper grinding disc.

[0005] Further, first drive shafts are fixed to both ends of the first crushing roller, and second drive shafts are fixed to both ends of the second crushing roller. Both the first drive shaft and the second drive shaft are rotatably connected to the crushing hopper. A first gear and a second gear are respectively sleeved on the first drive shaft and the second drive shaft. Both the first gear and the second gear are located outside the crushing box body. The first gear meshes with the second gear. A motor is installed on the outer wall of the crushing box body. The output shaft of the motor is connected with a driving pulley, and the first drive shaft is connected with a driven pulley. The driving pulley is connected with the driven pulley through belt transmission.

[0006] Further, guide blocks are arranged between adjacent two crushing components. Both ends of each guide block are fixedly connected to the crushing hopper. Both sides of each guide block are inclined planes, and the two inclined planes intersect at the top of the guide block.

[0007] Further, a vertical rod is fixed to the top of the material distributing plate. A strip-shaped groove for the vertical rod to pass through is formed in the top of the crushing box body. A linear driving module is fixed to the top of the crushing box body, and the vertical rod is connected to the sliding seat of the linear driving module.

[0008] Further, a guide ring is fixedly sleeved on the lower grinding disc. An annular groove is formed in the inner wall of the grinding cylinder. The guide ring is rotationally fitted in the annular groove. A first motor is arranged below the lower grinding disc, and the first motor is in transmission connection with the lower grinding disc.

[0009] Further, a main shaft is fixed to the top of the upper grinding disc. The main shaft is rotatably connected to a motor base. A second motor is arranged in the motor base, and the output shaft of the second motor is in transmission connection with the main shaft.

[0010] Further, a cylinder is arranged above the motor base. The cylinder body of the cylinder is installed on the grinding cylinder, and the telescopic shaft of the cylinder is connected to the motor base.

[0011] Further, the bottom surface of the upper grinding disc and the top surface of the lower grinding disc are both subjected to friction treatment.

[0012] Further, a feed window communicating with the primary crushing chamber is formed in the side wall of the crushing box body.

[0013] The beneficial effects of the utility model are as follows:

[0014] Firstly, the preliminary crushing of the lithium iron phosphate material is completed through the cooperation of the first crushing roller and the second crushing roller. The preliminarily crushed material enters the grinding cylinder, and the material is ground through the cooperation of the upper grinding disc and the lower grinding disc. Therefore, the lithium iron phosphate material is crushed more thoroughly through two crushing operations, and has a better crushing effect. Description of the Drawings

[0015] Figure 1 This is a schematic diagram of the internal structure of a pulverizing device for the positive electrode material of a lithium battery according to the present utility model;

[0016] Figure 2 This is a schematic diagram of the external structure of a pulverizing device for the positive electrode material of a lithium battery according to the present utility model;

[0017] Figure 3 is Figure 2 the enlarged view of part A in

[0018] In the figure, 1 - pulverizing box body, 2 - primary pulverizing chamber, 3 - secondary pulverizing chamber, 4 - pulverizing hopper, 5 - first pulverizing roller, 6 - second pulverizing roller, 7 - material distributing plate, 8 - grinding cylinder, 9 - upper grinding disc, 10 - lower grinding disc, 11 - conveying pipeline, 12 - discharge pipe, 13 - first driving shaft, 14 - second driving shaft, 15 - first gear, 16 - second gear, 17 - motor, 18 - driving pulley, 19 - driven pulley, 20 - belt, 21 - guiding block, 22 - vertical rod, 23 - strip-shaped groove, 24 - linear driving module, 25 - guiding ring, 26 - first motor, 27 - main shaft, 28 - motor base, 29 - second motor, 30 - cylinder, 31 - feeding window. Specific embodiments

[0019] The technical solution of the present utility model will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present utility model is not limited to the following description.

[0020] As Figures 1 to 3As shown in the figure, a crushing device for the cathode material of a lithium battery includes a crushing box body 1. An upper-stage crushing chamber 2 and a lower-stage crushing chamber 3 are arranged up and down in the crushing box body 1. A crushing hopper 4 is fixed in the upper-stage crushing chamber 2. A feed window 31 communicating with the upper-stage crushing chamber 2 is opened on the side wall of the crushing box body 1. The lithium iron phosphate material is put into the crushing hopper 4 through the feed window 31. Specifically, a lifting conveyor can be used to convey the lithium iron phosphate material, so that the conveying end of the lifting conveyor passes through the feed window 31 and is located above the crushing hopper 4, thereby automatically conveying the lithium iron phosphate material into the crushing hopper 4. A plurality of crushing components are arranged at intervals along the length direction of the crushing hopper 4 to increase the crushing efficiency. The crushing components include a first crushing roller 5 and a second crushing roller 6 that are rotatably arranged. A material guiding plate 7 is arranged in the crushing hopper 4. The material guiding plate 7 is located above the crushing components. The material guiding plate 7 makes a reciprocating linear motion along the length direction of the crushing hopper 4. A grinding cylinder 8 is arranged in the lower-stage crushing chamber 3. An upper grinding disc 9 and a lower grinding disc 10 are rotatably arranged in the grinding cylinder 8. The upper grinding disc 9 has the freedom to move axially along the lower grinding disc 10. The bottom of the crushing hopper 4 is connected to the grinding cylinder 8 through a conveying pipeline 11. One end of the conveying pipeline 11 connected to the grinding cylinder 8 is located above the lower grinding disc 10. A discharge pipe 12 is connected to the side wall of the grinding cylinder 8. The discharge pipe 12 is located between the lower grinding disc 10 and the upper grinding disc 9. The preliminary crushing of the lithium iron phosphate material is completed through the cooperation of the first crushing roller 5 and the second crushing roller 6. The preliminarily crushed material enters the grinding cylinder 8 through the conveying pipeline 11, so that the material is located between the upper grinding disc 9 and the lower grinding disc 10. The upper grinding disc 9 rotates and moves closer to the lower grinding disc 10 at the same time, realizing the grinding operation of the lithium iron phosphate material. Thus, the lithium iron phosphate material is crushed more thoroughly through two crushing operations, and has a better crushing effect. Preferably, the bottom surface of the upper grinding disc 9 and the top surface of the lower grinding disc 10 are both subjected to friction treatment to improve the grinding effect.

[0021] Furthermore, as Figure 2 and Figure 3As shown in the figure, first drive shafts 13 are fixed to both ends of the first crushing roller 5, and second drive shafts 14 are fixed to both ends of the second crushing roller 6. Both the first drive shaft 13 and the second drive shaft 14 are rotatably connected to the crushing hopper 4. A first gear 15 and a second gear 16 are respectively sleeved on the first drive shaft 13 and the second drive shaft 14. Both the first gear 15 and the second gear 16 are located outside the crushing box body 1. The first gear 15 meshes with the second gear 16. An electric motor 17 is installed on the outer wall of the crushing box body 1. The output shaft of the electric motor 17 is connected with a driving pulley 18, and the first drive shaft 13 is connected with a driven pulley 19. The driving pulley 18 is drivingly connected to the driven pulley 19 through a belt 20. The electric motor 17 drives the driving pulley 18 to rotate. The driving pulley 18 drives the driven pulley 19 to rotate through the belt 20. The driven pulley 19 drives the first drive shaft 13 to rotate. The first drive shaft 13 drives the second drive shaft 14 to rotate through the meshing of the first gear 15 and the second gear 16, so that the first crushing roller 5 and the second crushing roller 6 rotate, and the rotation directions are opposite, completing the crushing of the lithium iron phosphate material, reducing the particle size of the lithium iron phosphate material, and facilitating the entry into the grinding cylinder 8 for grinding operation.

[0022] Further, as Figure 1 shown, guide blocks 21 are arranged between adjacent two crushing components. Both ends of the guide block 21 are fixedly connected to the crushing hopper 4. Both sides of the guide block 21 are inclined surfaces, and the two inclined surfaces intersect at the top of the guide block 21. The inclined surfaces of the guide block 21 are used to guide the lithium iron phosphate material, so that the lithium iron phosphate material will not stay in the crushing hopper 4.

[0023] Further, a vertical rod 22 is fixed to the top of the material distributing plate 7. A strip-shaped groove 23 for the vertical rod 22 to pass through is opened at the top of the crushing box body 1. A linear driving module 24 is fixed to the top of the crushing box body 1. The vertical rod 22 is connected to the sliding seat of the linear driving module 24. The linear driving module 24 drives the material distributing plate 7 to reciprocate through the vertical rod 22, evenly distributing the lithium iron phosphate material in the crushing hopper 4 and avoiding the situation of jamming caused by accumulation in one place.

[0024] Further, as Figure 1 shown, a guide ring 25 is fixedly sleeved on the lower grinding disc 10. An annular groove is opened on the inner wall of the grinding cylinder 8. The guide ring 25 is rotationally fitted in the annular groove. A first motor 26 is arranged below the lower grinding disc 10. The first motor 26 is drivingly connected to the lower grinding disc 10. The first motor 26 drives the lower grinding disc 10 to rotate to cooperate with the upper grinding disc 9 to complete the grinding operation.

[0025] Further, as Figure 1As shown in the figure, a main shaft 27 is fixed to the top of the upper grinding disc 9. The main shaft 27 is rotatably connected to a motor base 28. A second motor 29 is arranged inside the motor base 28. The output shaft of the second motor 29 is drivingly connected to the main shaft 27. Above the motor base 28, a cylinder 30 is arranged. The cylinder body of the cylinder 30 is installed on the grinding cylinder 8. The telescopic shaft of the cylinder 30 is connected to the motor base 28. The second motor 29 drives the upper grinding disc 9 to rotate. The cylinder 30 drives the motor base 28 to move, thereby driving the upper grinding disc 9 to move closer to or away from the lower grinding disc 10, so that the upper grinding disc 9 rotates while making a linear motion to cooperate with the lower grinding disc 10 to complete the grinding operation; specifically, valves are arranged on both the discharge pipe 12 and the conveying pipeline 11, and the discharge pipe 12 is connected to a negative pressure conveying pump. After grinding is completed, the valve of the discharge pipe 12 is opened, and at the same time, the negative pressure conveying pump works to discharge the material between the upper grinding disc 9 and the lower grinding disc 10 by means of negative pressure. After the discharge is completed, the valve of the discharge pipe 12 is closed, the negative pressure conveying pump is closed, and the valve on the conveying pipeline 11 is opened to put the preliminarily crushed material into the grinding cylinder 8 for grinding. In this way, the secondary crushing operation is completed repeatedly.

Claims

1. A pulverizing device for lithium battery positive electrode materials, characterized in that: The invention comprises a crushing box (1), wherein a primary crushing chamber (2) and a secondary crushing chamber (3) are arranged above and below the crushing box (1), a crushing bucket (4) is fixed in the primary crushing chamber (2), a plurality of crushing assemblies are arranged in the crushing bucket (4) along its length direction, the crushing assemblies include a first crushing roller (5) and a second crushing roller (6) which are rotatably arranged, a material-dividing plate (7) is arranged in the crushing bucket (4), the material-dividing plate (7) is located above the crushing assembly, the material-dividing plate (7) performs reciprocating linear motion along the length direction of the crushing bucket (4), and the secondary crushing chamber (2) is fixed with a crushing bucket (4). (3) is provided with a grinding cylinder (8), an upper grinding disc (9) and a lower grinding disc (10) are rotatably provided in the grinding cylinder (8), the upper grinding disc (9) has the freedom to move axially along the lower grinding disc (10), the bottom of the crushing bucket (4) is connected to the grinding cylinder (8) through a conveying pipe (11), one end of the conveying pipe (11) connected to the grinding cylinder (8) is located above the lower grinding disc (10), the side wall of the grinding cylinder (8) is connected with a discharge pipe (12), and the discharge pipe (12) is located between the lower grinding disc (10) and the upper grinding disc (9).

2. A pulverizing device for lithium battery positive electrode materials according to claim 1, characterized in that: A first drive shaft (13) is fixed to both ends of the first crushing roller (5), and a second drive shaft (14) is fixed to both ends of the second crushing roller (6). The first drive shaft (13) and the second drive shaft (14) are both rotatably connected to the crushing bucket (4). A first gear (15) and a second gear (16) are respectively mounted on the first drive shaft (13) and the second drive shaft (14). The first gear (15) and the second gear (16) are both located outside the crushing box (1). The first gear (15) meshes with the second gear (16). A motor (17) is installed on the outer wall of the crushing box (1). The output shaft of the motor (17) is connected to a driving pulley (18). The first drive shaft (13) is connected to a driven pulley (19). The driving pulley (18) is connected to the driven pulley (19) through a belt (20).

3. A pulverizing device for lithium battery positive electrode materials according to claim 1, characterized in that: A guide block (21) is provided between two adjacent crushing assemblies, both ends of the guide block (21) are fixedly connected to the crushing bucket (4), both sides of the guide block (21) are inclined surfaces, and the two inclined surfaces intersect at the top of the guide block (21).

4. A pulverizing device for lithium battery positive electrode materials according to claim 1, characterized in that: A vertical rod (22) is fixed on the top of the material stripping plate (7), a strip groove (23) is provided on the top of the crushing box (1) for the vertical rod (22) to pass through, a linear drive module (24) is fixed on the top of the crushing box (1), and the vertical rod (22) is connected to a slide seat of the linear drive module (24).

5. The pulverizing device for lithium battery positive electrode materials according to claim 1, characterized in that: A guide ring (25) is fixedly sleeved on the lower grinding disc (10), an annular groove is provided on the inner wall of the grinding cylinder (8), and the guide ring (25) is rotatably fitted in the annular groove. A first motor (26) is arranged below the lower grinding disc (10), and the first motor (26) is connected to the lower grinding disc (10) in a transmission manner.

6. A pulverizing device for lithium battery positive electrode materials according to claim 1, characterized in that: A main shaft (27) is fixed on the top of the upper grinding disc (9), and the main shaft (27) is rotatably connected to a motor seat (28). A second motor (29) is arranged in the motor seat (28), and an output shaft of the second motor (29) is transmission-connected to the main shaft (27).

7. A pulverizing device for lithium battery positive electrode materials according to claim 6, characterized in that: A cylinder (30) is arranged above the motor seat (28); a cylinder body of the cylinder (30) is mounted on the grinding cylinder (8); and a telescopic shaft of the cylinder (30) is connected to the motor seat (28).

8. The pulverizing device for lithium battery positive electrode materials according to claim 1, characterized in that: The bottom surface of the upper grinding disc (9) and the top surface of the lower grinding disc (10) are both subjected to friction treatment.

9. A pulverizing device for lithium battery positive electrode materials according to claim 1, characterized in that: The side wall of the pulverizing box (1) is provided with a feeding window (31) communicating with the primary pulverizing chamber (2).

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