Mixing method for graphite negative electrode material production

Abstract

The invention discloses a material mixing method for graphite negative electrode material production, and relates to the technical field of graphite negative electrode material mixing. The method specifically comprises the following steps: S1, screening a graphite negative electrode material, and weighing for later use; s2, putting the weighed graphite negative electrode material for later use into material mixing equipment for stirring and material mixing treatment; wherein the material mixing equipment in the step S2 comprises a supporting frame plate and a mixing tank, two material distributing tanks are fixedly mounted on the supporting frame plate, the bottom ends of the two material distributing tanks fixedly communicate with communicating pipes, and the ends, away from the material distributing tanks, of the communicating pipes fixedly communicate with the mixing tank. According to the mixing method for graphite negative electrode material production, the rotating, lifting and position changing functions of the stirring rods in the mixing assembly are combined together, so that the stirring blades can fully and uniformly mix materials at multiple positions and depths, and the mixing effect and efficiency of the mixing method for graphite negative electrode material production are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of graphite anode material mixing, and specifically to a mixing method for producing graphite anode materials. Background Art

[0002] Graphite as the anode material of power batteries is the mainstream choice in the current market. The production steps of graphite anodes include mixing natural spherical graphite and pitch, heating and impregnating under a preset pressure after mixing evenly, softening and flowing the pitch to fill the internal pores of natural spherical graphite, obtaining an intermediate product after cooling, graphitizing the intermediate product, and then obtaining the graphite anode material through steps such as crushing, demagnetization, and grading. Among them, mixing is one of the key steps.

[0003] At present, when mixing materials for graphite anode materials, a mixing device is usually used for mixing. However, during the mixing process of the existing mixing device, the mixing rods used generally have fixed positions, resulting in limited mixing angles, and the fixed angles may cause a single fluid flow pattern during mixing, unable to effectively cover all areas within the entire container, seriously affecting the mixing effect and efficiency of the materials. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a mixing method for producing graphite anode materials, which solves the problems mentioned in the above background art.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A mixing method for producing graphite anode materials specifically includes the following steps:

[0006] S1. Screen the graphite anode materials and weigh them for standby;

[0007] S2. Put the weighed graphite anode materials into a mixing device for stirring and mixing treatment;

[0008] Among them, the mixing device in step S2 includes a support frame plate and a mixing tank. Two feeding tanks are fixedly installed on the support frame plate. The bottom ends of the two feeding tanks are fixedly connected with connecting pipes, and the ends of the connecting pipes far away from the feeding tanks are fixedly connected with the mixing tank;

[0009] A mixing component is arranged inside the mixing tank, and the mixing of the graphite anode materials is completed through the mixing component.

[0010] Preferably, the mixing assembly includes a driving motor fixedly installed on the mixing tank. An output shaft is fixedly installed at the output end of the driving motor. A trapezoidal block is installed at the end of the output shaft away from the driving motor. Three connecting rods are fixedly installed on the lower end surface of the trapezoidal block. A bearing is fixedly installed at the end of the connecting rod away from the trapezoidal block. A connecting component is fixedly installed on the bearing. A stirring rod is arranged on the connecting component. Stirring blades are fixedly installed on the stirring rod. Stirring holes are arranged on the stirring blades.

[0011] Preferably, the end of the output shaft away from the driving motor extends into the interior of the mixing tank. The three connecting rods are all arranged obliquely. The number of the stirring holes is multiple and they are evenly distributed.

[0012] Preferably, the connecting component includes a fixed rod fixedly installed on the bearing. A sliding rod is fixedly installed at the end of the fixed rod away from the bearing. A limiting block is fixedly installed at the end of the sliding rod away from the fixed rod. A limiting groove is formed inside the stirring rod. The end of the sliding rod away from the connecting rod extends into the limiting groove. The limiting block is slidably installed with the limiting groove.

[0013] Preferably, a positioning ring plate is fixedly installed on the inner bottom of the mixing tank. An arc-shaped convex block is fixedly installed on the positioning ring plate. A round head is rotatably installed at the bottom end of the stirring rod. The positioning ring plate, the arc-shaped convex block and the round head are alternately in contact.

[0014] Preferably, a support plate is fixedly installed on the inner side surface of the mixing tank. A fixing plate is fixedly installed on the support plate. An annular plate is fixedly installed on the fixing plate. An inclined surface is arranged on the lower end surface of the annular plate. Auxiliary teeth are arranged on the inclined surface. A gear is fixedly installed on the fixed rod. The gear meshes with the auxiliary teeth.

[0015] Preferably, a mounting plate is fixedly installed on the inner top of the mixing tank. A positioning slide rod is slidably installed on the mounting plate. A closing block is fixedly installed at one end of the positioning slide rod. A discharge groove is formed on the lower end surface of the closing block. A contact arc plate is fixedly installed at the other end of the positioning slide rod. A bi-directional cam is fixedly installed on the output shaft. The contact arc plate is in contact and slides with the bi-directional cam. A return spring is fixedly installed on the mounting plate. The end of the return spring away from the mounting plate is fixedly connected to the contact arc plate. The position of the return spring is outside the positioning slide rod.

[0016] Preferably, a discharge pipe is fixedly communicated with the lower end surface of the mixing tank. The shape of the discharge pipe is L-shaped. A feed pipe is fixedly communicated with the sub-mixing tank.

[0017] Preferably, the mixing tank is located below the support plate. Four support legs are fixedly installed on the lower end surface of the mixing tank and outside the discharge pipe. A plurality of stabilizing legs are fixedly installed on the lower end surface of the support plate. A stabilizing plate is fixedly installed between two of the stabilizing legs. The end of the discharge pipe away from the mixing tank penetrates through the stabilizing plate and is outside the stabilizing plate.

[0018] The present invention provides a mixing method for producing graphite anode materials. Compared with the prior art, it has the following beneficial effects:

[0019] 1. In the present invention, the driving motor drives the output shaft to rotate. The output shaft drives the double-sided cam to rotate 90 degrees. Through the contact between the double-sided cam and the contact arc plate, a part of the volume of the closing block in the connecting pipe is inside the mixing tank. The connecting pipe discharges part of the raw materials in the dosing tank into the mixing tank through the discharge slot. By continuously rotating the output shaft by the driving motor, through the cooperation between the double-sided cam and the contact arc plate, the contact arc plate will, under the action of the return spring, drive the closing block to reciprocate in the connecting pipe by means of the sliding rod. The discharge slot on the closing block enables the materials in the dosing tank to be fed intermittently, effectively ensuring that the raw materials are discharged at the appropriate time and in the appropriate amount, which helps to achieve precise mixing of the graphite anode materials;

[0020] 2. In the present invention, when the output shaft rotates, the output shaft drives the fixed rod on the bearing to rotate around the output shaft through the connecting rod on the frustum-shaped block. The stirring blades on the fixed rod rotate around the output shaft. At the same time, the gear on the fixed rod meshes with the auxiliary tooth block on the annular plate, so that the stirring blades on the stirring rod rotate around the fixed rod. By rotating around different center points, the stirring blades can move at different angles and directions, thereby breaking the aggregation of the materials and enhancing the mixing effect;

[0021] 3. In the present invention, when the stirring rod rotates around the output shaft, the stirring rod intermittently contacts the surface of the positioning ring plate and the arc-shaped protrusions. The stirring rod reciprocates up and down on the sliding rod through the cooperation between the limiting slot and the limiting block. The stirring blades on the stirring rod mix the materials at different depths in the mixing tank, effectively improving the mixing effect of the mixing equipment;

[0022] 4. In the present invention, by combining the functions of rotation, lifting, and position change of the stirring rod in the mixing assembly, the stirring blades can fully and evenly mix the materials at multiple positions and depths, effectively improving the mixing effect and efficiency of the mixing method for producing graphite anode materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention Figure 1 ;

[0024] Figure 2 Schematic diagram of the internal structure of the mixing tank in the present invention;

[0025] Figure 3 Side sectional view of the mixing tank in the present invention;

[0026] Figure 4 Schematic diagram of the structure of the mixing component in the present invention;

[0027] Figure 5 Schematic diagram of the structure of the bi-directional cam in the present invention;

[0028] Figure 6 Schematic diagram of the structure of the annular plate in the present invention;

[0029] Figure 7 Schematic diagram of the structure of the stirring rod in the present invention;

[0030] Figure 8 Schematic diagram of the structure of the sliding rod in the present invention.

[0031] In the figure: 1, support frame plate; 2, mixing tank; 3, material distribution tank; 4, connecting pipe; 5, drive motor; 6, output shaft; 7, table-shaped block; 8, connecting rod; 9, bearing; 10, stirring rod; 11, stirring blade; 12, stirring hole; 13, fixed rod; 14, sliding rod; 15, limit block; 16, limit groove; 17, positioning ring plate; 18, arc-shaped convex block; 19, round head; 20, support plate; 21, fixing plate; 22, annular plate; 23, inclined surface; 24, auxiliary tooth block; 25, gear; 26, mounting plate; 27, positioning slide bar; 28, closing block; 29, discharge chute; 30, contact arc plate; 31, bi-directional cam; 32, return spring; 33, discharge pipe; 34, feed pipe; 35, support leg; 36, stable support leg; 37, stable plate. Specific embodiments

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1-8 , the present invention is a mixing method for producing graphite anode materials, which specifically includes the following steps:

[0034] S1. Screen the graphite anode materials and weigh them for standby;

[0035] S2. Put the graphite anode material after weighing and standby into a mixing device for stirring and mixing treatment;

[0036] Among them, the mixing device in step S2 includes a support frame plate 1 and a mixing tank 2. Two feeding tanks 3 are fixedly installed on the support frame plate 1. The two feeding tanks 3 are respectively filled with powder raw materials and liquid raw materials. The bottom ends of the two feeding tanks 3 are fixedly communicated with a communicating pipe 4. The end of the communicating pipe 4 far away from the feeding tank 3 is fixedly communicated with the mixing tank 2. The lower end surface of the mixing tank 2 is fixedly communicated with a discharge pipe 33. The shape of the discharge pipe 33 is L-shaped. A feeding pipe 34 is fixedly communicated with the feeding tank 3. The mixing tank 2 is located below the support frame plate 1. Four support legs 35 are fixedly installed on the lower end surface of the mixing tank 2 and outside the discharge pipe 33. A plurality of stabilizing legs 36 are fixedly installed on the lower end surface of the support frame plate 1. A stabilizing plate 37 is fixedly installed between two stabilizing legs 36. The end of the discharge pipe 33 far away from the mixing tank 2 penetrates through the stabilizing plate 37 and is outside the stabilizing plate 37. The support legs 35 are used to ensure the stability of the mixing pipe. A valve is provided on the discharge pipe 33. Since the valve is a technology well-known to those skilled in the art, no specific description is made here;

[0037] A mixing component is arranged inside the mixing tank 2. The mixing of the graphite anode material is completed through the mixing component. The mixing component includes a driving motor 5 fixedly installed on the mixing tank 2. The output end of the driving motor 5 is fixedly installed with an output shaft 6. One end of the output shaft 6 far away from the driving motor 5 is installed with a table-shaped block 7. Three connecting rods 8 are fixedly installed on the lower end surface of the table-shaped block 7. One end of the connecting rod 8 far away from the table-shaped block 7 is fixedly installed with a bearing 9. A connecting component is fixedly installed on the bearing 9. A stirring rod 10 is arranged on the connecting component. Stirring blades 11 are fixedly installed on the stirring rod 10. Stirring holes 12 are arranged on the stirring blades 11. One end of the output shaft 6 far away from the driving motor 5 extends into the mixing tank 2. The three connecting rods 8 are all arranged obliquely. The number of the stirring holes 12 is multiple and they are evenly distributed. A support plate 20 is fixedly installed on the inner side surface of the mixing tank 2. A fixing plate 21 is fixedly installed on the support plate 20. An annular plate 22 is fixedly installed on the fixing plate 21. An inclined surface 23 is arranged on the lower end surface of the annular plate 22. Auxiliary tooth blocks 24 are arranged on the inclined surface 23. A gear 25 is fixedly installed on a fixing rod 13. The gear 25 meshes with the auxiliary tooth blocks 24. The use of multiple stirring holes 12 ensures better mixing effect of the materials in the mixing tank 2. Among them, the auxiliary tooth blocks 24 are multiple and are arranged annularly;

[0038] In this text, the driving motor 5 drives the output shaft 6 to rotate. The output shaft 6 drives the bidirectional cam 31 to rotate by ninety degrees. Through the contact between the bidirectional cam 31 and the contact arc plate 30, a part of the volume of the closing block 28 in the connecting pipe 4 is inside the mixing tank 2. The connecting pipe 4 discharges part of the raw materials in the dispensing tank 3 into the mixing tank 2 through the discharge chute 29. By driving the output shaft 6 to continuously rotate by the driving motor 5, through the cooperation between the bidirectional cam 31 and the contact arc plate 30, the contact arc plate 30 will, under the action of the return spring 32, drive the closing block 28 to reciprocate in the connecting pipe 4 by means of the sliding rod 14. The material in the dispensing tank 3 is intermittently discharged through the discharge chute 29 on the closing block 28, effectively ensuring that the raw materials are discharged at the appropriate time and in the appropriate amount, which helps to achieve precise mixing of the graphite anode material.

[0039] The connecting component includes a fixed rod 13 fixedly installed on the bearing 9. One end of the fixed rod 13 away from the bearing 9 is fixedly installed with a sliding rod 14. One end of the sliding rod 14 away from the fixed rod 13 is fixedly installed with a limiting block 15. A limiting groove 16 is formed inside the stirring rod 10. One end of the sliding rod 14 away from the connecting rod 8 extends into the limiting groove 16. The limiting block 15 is slidably installed with the limiting groove 16. A positioning ring plate 17 is fixedly installed on the inner bottom of the mixing tank 2. An arc-shaped convex block 18 is fixedly installed on the positioning ring plate 17. A round head 19 is rotatably installed at the bottom end of the stirring rod 10. The positioning ring plate 17, the arc-shaped convex block 18 and the round head 19 are alternately in contact. Among them, through the cooperation between the limiting block 15 and the limiting groove 16 of the stirring rod 10, the stirring rod 10 can only slide on the sliding rod 14 and cannot rotate.

[0040] In this text, when the output shaft 6 rotates, the output shaft 6 drives the fixed rod 13 on the bearing 9 to rotate around the output shaft 6 through the connecting rod 8 on the frustum-shaped block 7. The stirring blades 11 on the fixed rod 13 rotate around the output shaft 6. At the same time, the gear 25 on the fixed rod 13 meshes with the auxiliary tooth block 24 on the annular plate 22, so that the stirring blades 11 on the stirring rod 10 rotate around the fixed rod 13. By rotating around different center points, the stirring blades 11 can move at different angles and directions, thereby breaking the cohesion of the materials and enhancing the mixing effect.

[0041] An installation plate 26 is fixedly installed at the inner top of the mixing tank 2. A positioning slide bar 27 is slidably installed on the installation plate 26. One end of the positioning slide bar 27 is fixedly installed with a closing block 28. A discharge groove 29 is formed on the lower end surface of the closing block 28. The other end of the positioning slide bar 27 is fixedly installed with a contact arc plate 30. A bi-directional cam 31 is fixedly installed on the output shaft 6. The contact arc plate 30 is in contact with and slides on the bi-directional cam 31. A return spring 32 is fixedly installed on the installation plate 26. One end of the return spring 32 away from the installation plate 26 is fixedly connected to the contact arc plate 30. The position of the return spring 32 is outside the positioning slide bar 27. The friction between the contact arc plate 30 and the bi-directional cam 31 is small to ensure that the bi-directional cam 31 rotates under the extrusion of the contact arc plate 30.

[0042] In this article, when the stirring rod 10 rotates around the output shaft 6, the stirring rod 10 will intermittently contact the surface of the positioning ring plate 17 and the arc-shaped convex block 18. The stirring rod 10 will reciprocally lift and lower on the sliding rod 14 through the cooperation of the limiting groove 16 and the limiting block 15. The stirring blades 11 on the stirring rod 10 will mix the materials at different depths in the mixing tank 2.

[0043] During use, the raw materials to be mixed are respectively input into the distribution tank 3 through the feed pipe 34. Then, the driving motor 5 drives the output shaft 6 to rotate. The output shaft 6 is used to drive the bi-directional cam 31 to rotate by ninety degrees. Through the contact between the bi-directional cam 31 and the contact arc plate 30, a part of the volume of the closing block 28 in the communicating pipe 4 is inside the mixing tank 2. The communicating pipe 4 discharges a part of the raw materials in the distribution tank 3 into the mixing tank 2 through the discharge groove 29.

[0044] The driving motor 5 drives the output shaft 6 to continuously rotate. Through the cooperation between the bi-directional cam 31 and the contact arc plate 30, the contact arc plate 30 will, under the action of the return spring 32, drive the closing block 28 to reciprocally move in the communicating pipe 4 through the sliding rod 14. The materials in the distribution tank 3 are intermittently fed through the discharge groove 29 on the closing block 28.

[0045] When the output shaft 6 rotates, the output shaft 6 will drive the fixed rod 13 on the bearing 9 to rotate around the output shaft 6 through the connecting rod 8 on the frustum-shaped block 7. The stirring blades 11 on the fixed rod 13 will rotate around the output shaft 6. At the same time, the gear 25 on the fixed rod 13 will mesh with the auxiliary tooth block 24 on the annular plate 22, so that the stirring blades 11 on the stirring rod 10 rotate around the fixed rod 13. By rotating around different center points, the stirring blades 11 can move at different angles and directions.

[0046] When the stirring rod 10 rotates around the output shaft 6, the stirring rod 10 will intermittently contact the surface of the positioning ring plate 17 and the arc-shaped convex block 18. The stirring rod 10 will reciprocate up and down on the sliding rod 14 through the cooperation of the limiting groove 16 and the limiting block 15. The stirring blades 11 on the stirring rod 10 will mix the materials at different depths in the mixing tank 2.

[0047] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0048] 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 spirit of the present invention.

Claims

1. A mixing method for producing graphite anode materials, characterized in that: Specifically, it includes the following steps: S1. Screen the graphite anode material and weigh it for standby; S2. Put the weighed graphite anode material into a mixing device for stirring and mixing treatment; Among them, the mixing device in step S2 includes a support plate (1) and a mixing tank (2). Two feeding tanks (3) are fixedly installed on the support plate (1). The bottom ends of the two feeding tanks (3) are fixedly communicated with a connecting pipe (4). The end of the connecting pipe (4) away from the feeding tank (3) is fixedly communicated with the mixing tank (2); A mixing component is arranged inside the mixing tank (2), and the mixing of the graphite anode material is completed through the mixing component.

2. The mixing method for producing a graphite anode material according to claim 1, wherein: The mixing component includes a driving motor (5) fixedly installed on the mixing tank (2). The output end of the driving motor (5) is fixedly installed with an output shaft (6). One end of the output shaft (6) away from the driving motor (5) is installed with a trapezoidal block (7). Three connecting rods (8) are fixedly installed on the lower end surface of the trapezoidal block (7). One end of the connecting rod (8) away from the trapezoidal block (7) is fixedly installed with a bearing (9). A connecting component is fixedly installed on the bearing (9). A stirring rod (10) is arranged on the connecting component. Stirring blades (11) are fixedly installed on the stirring rod (10). Stirring holes (12) are arranged on the stirring blades (11).

3. A mixing method for producing a graphite anode material according to claim 2, characterized in that: One end of the output shaft (6) away from the driving motor (5) extends into the interior of the mixing tank (2). The three connecting rods (8) are all arranged obliquely. The number of the stirring holes (12) is multiple and they are evenly distributed.

4. A mixing method for producing a graphite anode material according to claim 2, characterized in that: The connecting component includes a fixing rod (13) fixedly installed on the bearing (9). One end of the fixing rod (13) away from the bearing (9) is fixedly installed with a sliding rod (14). A limiting block (15) is fixedly installed at one end of the sliding rod (14) away from the fixing rod (13). A limiting groove (16) is opened inside the stirring rod (10). One end of the sliding rod (14) away from the connecting rod (8) extends into the limiting groove (16), and the limiting block (15) is slidably installed with the limiting groove (16).

5. A mixing method for producing a graphite anode material according to claim 4, characterized in that: A positioning ring plate (17) is fixedly installed on the inner bottom of the mixing tank (2). An arc-shaped convex block (18) is fixedly installed on the positioning ring plate (17). A round head (19) is rotatably installed at the bottom end of the stirring rod (10). The positioning ring plate (17), the arc-shaped convex block (18) and the round head (19) are alternately in contact.

6. A mixing method for producing a graphite anode material according to claim 4, characterized in that: A support plate (20) is fixedly installed on the inner side surface of the mixing tank (2). A fixing plate (21) is fixedly installed on the support plate (20). An annular plate (22) is fixedly installed on the fixing plate (21). An inclined surface (23) is arranged on the lower end surface of the annular plate (22). Auxiliary tooth blocks (24) are arranged on the inclined surface (23). A gear (25) is fixedly installed on the fixing rod (13), and the gear (25) meshes with the auxiliary tooth blocks (24).

7. A mixing method for producing a graphite anode material according to claim 5, characterized in that: An installation plate (26) is fixedly installed at the inner top of the mixing tank (2). A positioning slide rod (27) is slidably installed on the installation plate (26). One end of the positioning slide rod (27) is fixedly installed with a sealing block (28). A discharge groove (29) is formed on the lower end surface of the sealing block (28). The other end of the positioning slide rod (27) is fixedly installed with a contact arc plate (30). A bi-directional cam (31) is fixedly installed on the output shaft (6). The contact arc plate (30) is in contact with and slides on the bi-directional cam (31). A return spring (32) is fixedly installed on the installation plate (26). The end of the return spring (32) away from the installation plate (26) is fixedly connected to the contact arc plate (30). The position of the return spring (32) is outside the positioning slide rod (27).

8. A mixing method for producing a graphite anode material according to claim 1, characterized in that: A discharge pipe (33) is fixedly communicated with the lower end surface of the mixing tank (2). The discharge pipe (33) is in an L shape. A feed pipe (34) is fixedly communicated with the distribution tank (3).

9. A mixing method for producing a graphite anode material according to claim 8, characterized in that: The mixing tank (2) is located below the support frame plate (1). Four support legs (35) are fixedly installed on the lower end surface of the mixing tank (2) and outside the discharge pipe (33). A plurality of stabilizing legs (36) are fixedly installed on the lower end surface of the support frame plate (1). A stabilizing plate (37) is fixedly installed between two of the stabilizing legs (36). The end of the discharge pipe (33) away from the mixing tank (2) penetrates through the stabilizing plate (37) and is outside the stabilizing plate (37).

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