Raw material mixing device for producing phosphorus-based negative electrode material

Abstract

A raw material mixing device for producing a phosphorus-based negative electrode material belongs to the technical field of battery material preparation. The problems that traditional mixing and grinding equipment is low in mixing efficiency and uneven in grinding effect are solved. The inner grinding unit and the outer grinding unit are nested, the inner grinding unit is rotationally arranged in the middle of the upper end face of the workbench, the outer grinding unit is arranged outside the inner grinding unit and fixedly arranged on the upper end face of the workbench, and the outer wall of the inner grinding unit and the inner wall of the outer grinding unit are attached and spaced. The collecting mechanism is arranged at the lower end of the workbench, and the upper end of the collecting mechanism communicates with the gap between the outer wall of the inner grinding unit and the inner wall of the outer grinding unit. According to the utility model, high-efficiency mixing can be realized, and the mixing uniformity is improved. Fine grinding can be achieved, and the product quality is improved. And convenient collection can be achieved, material loss is reduced, and production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the battery material preparation technical field especially relates to raw material mixing arrangement of production phosphorus base negative material. BACKGROUND

[0002] Phosphorus base negative material because of its high energy density and low cost advantage, in the lithium ion battery field shows great application potential. However, its preparation process raw material's mixing uniformity and grinding fineness directly influence the electrochemical performance of final product. Traditional mixing and grinding equipment often exist mixing efficiency is low, the problem such as uneven grinding effect, difficult to satisfy the preparation demand of high performance phosphorus base negative material. Therefore, development mixes uniformly, the raw material mixing arrangement of grinding meticulous phosphorus base negative material to improve the production efficiency and product quality of high specific energy phosphorus base negative material has important meaning. SUMMARY

[0003] The utility model discloses a raw material mixing device for producing phosphorus base negative material, which solves the problems of low mixing efficiency and uneven grinding effect of traditional mixing and grinding equipment.

[0004] To achieve the above object, the utility model takes the technical scheme as follows: raw material mixing device for producing phosphorus base negative material, including workbench, stirring mechanism, grinding mechanism and collection mechanism, the grinding mechanism includes inner grinding unit and outer grinding unit, and the inner grinding unit and the outer grinding unit are nested, the inner grinding unit is rotatably arranged in the middle of the upper end face of the workbench, the outer grinding unit is arranged outside the inner grinding unit and fixedly arranged with the upper end face of the workbench, the outer wall of the inner grinding unit and the inner wall of the outer grinding unit are fitted and arranged with a gap, the stirring mechanism is arranged on the upper end of the inner grinding unit, the lower end of the stirring mechanism is communicated with the upper end of the inner grinding unit, and the collection mechanism is arranged on the lower end of the workbench, and the upper end of the collection mechanism is communicated with the gap between the outer wall of the inner grinding unit and the inner wall of the outer grinding unit.

[0005] Further, the stirring mechanism includes a housing, a rotating motor one, a stirring unit, a bottom plate and a conical flow guide groove, the housing is provided with a feeding port in the upper end, the rotating motor one is arranged in the middle of the upper end face of the housing, the stirring unit is arranged in the housing, the output end of the rotating motor one is vertically downward into the housing and is fixedly connected with the upper end of the stirring unit, the bottom plate is arranged in the housing and below the stirring unit, the bottom plate is provided with an electric gate, and the conical flow guide groove is arranged in the housing and below the bottom plate.

[0006] Further, the stirring unit comprises a rotating shaft and multiple groups of stirring pieces, the upper end of the rotating shaft is fixedly connected with the output end of the rotating motor one, the multiple groups of stirring pieces are circumferentially and evenly arranged on the outer wall of the rotating shaft, each group of stirring pieces comprises multiple connecting columns and multiple stirring blades, the multiple stirring blades are arranged on the outer wall of the rotating shaft in an axial direction and are evenly distributed through the connecting columns, and the multiple stirring blades are arranged in an increasing manner from bottom to top in the axial direction of the rotating shaft.

[0007] Further, the inner grinding unit comprises a column body, an inner grinding layer, a rotating motor two and a multi-directional material distributing assembly, the column body is rotationally arranged on the middle part of the upper end face of the workbench, the multi-directional material distributing assembly is arranged in the column body and located at the upper end of the column body, multiple through holes are uniformly and circumferentially arranged on the side wall of the column body, the upper end of the multi-directional material distributing assembly is in communication with the conical flow guide groove, the lower end of the multi-directional material distributing assembly is in communication with the corresponding through holes, the lower end of the outer wall of the column body is located below the multiple through holes and is provided with the inner grinding layer, the rotating motor two is arranged on the middle part of the lower end face of the workbench, and the output end of the rotating motor two is fixedly connected with the middle part of the lower end face of the column body in a vertical upward manner through the workbench.

[0008] Further, the multi-directional material distributing assembly comprises a main pipe and multiple material distributing pipes, the upper end of the main pipe is in communication with the lower end outlet of the conical flow guide groove, the lower end of the main pipe is in communication with the upper ends of the multiple material distributing pipes arranged in an inclined manner, and the discharge outlets of the lower ends of the multiple material distributing pipes are in communication with the corresponding through holes.

[0009] Further, the outer grinding unit comprises an outer grinding layer, a transition layer and a fixed layer, the fixed layer is arranged on the upper end face of the workbench and is sleeved on the outside of the column body, the inner wall of the fixed layer is provided with the transition layer, the inner wall of the transition layer is provided with the outer grinding layer, the outer grinding layer is arranged correspondingly with the inner grinding layer, and the inner wall of the outer grinding layer is in abutment with the outer wall of the inner grinding layer and is arranged with a gap.

[0010] Further, the collecting mechanism comprises a conical piece and a collecting groove, the conical piece is arranged on the lower end face of the workbench and penetrates out of the upper end face of the workbench, the side wall of the conical piece is provided with a gap, the gap between the inner wall of the outer grinding layer and the inner grinding layer is arranged in correspondence with the gap of the side wall of the conical piece in an up-down manner, and the lower end of the conical piece is in communication with the collecting groove.

[0011] Compared with the prior art, the present application has the following beneficial effects:

[0012] 1. The present application can realize efficient mixing, the multiple groups of stirring pieces and the stirring blades arranged in an inclined manner can realize the sufficient mixing of raw materials, and the uniformity of mixing is improved.

[0013] 2. The present application can realize fine grinding, the gap between the inner grinding layer and the outer grinding layer is designed, and the multiple-directional material distributing assembly uniformly distributes materials, so that the fine grinding of raw materials is ensured, and the product quality is improved.

[0014] 3. This utility model enables convenient collection. Through the design of the conical part and the collection groove, the material after grinding is collected quickly, reducing material loss and improving production efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 yes Figure 2 Enlarged view of point A;

[0018] Figure 4 This is a schematic diagram of the stirring unit. Figure 1 ;

[0019] Figure 5 This is a schematic diagram of the stirring unit. Figure 2 ;

[0020] Figure 6 This is a schematic diagram of the structure of a multi-directional material distribution component.

[0021] The component names and reference numerals in the above figures are as follows:

[0022] 1. Workbench; 2. Through hole; 3. Stirring mechanism; 4. Grinding mechanism; 5. Collection mechanism; 6. Shell; 7. Feed inlet; 8. Rotary motor one; 9. Stirring unit; 10. Base plate; 11. Electric gate; 12. Conical guide trough; 13. Inner grinding unit; 14. Multi-directional material distribution assembly; 15. Outer grinding unit; 16. Conical component; 17. Rotary motor two; 18. Collection trough; 19. Rotating shaft; 20. Connecting column; 21. Stirring blade; 22. Main pipe; 23. Material distribution pipe; 24. Discharge port; 25. Inner grinding layer; 26. Outer grinding layer; 27. Transition layer; 28. Fixing layer. Detailed Implementation

[0023] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0024] Detailed implementation methods: such as Figures 1-6As shown, this embodiment discloses a raw material mixing device for producing phosphorus-based anode materials, including a workbench 1, a stirring mechanism 3, a grinding mechanism 4, and a collecting mechanism 5. The grinding mechanism 4 includes an inner grinding unit 13 and an outer grinding unit 15, which are nested together. The inner grinding unit 13 is rotatably disposed in the middle of the upper surface of the workbench 1, and the outer grinding unit 15 is disposed outside the inner grinding unit 13 and fixedly disposed to the upper surface of the workbench 1. The outer wall of the inner grinding unit 13 and the inner wall of the outer grinding unit 15 are fitted together with a gap. The stirring mechanism 3 is disposed at the upper end of the inner grinding unit 13, and the lower end of the stirring mechanism 3 is connected to the upper end of the inner grinding unit 13. The collecting mechanism 5 is disposed at the lower end of the workbench 1, and the upper end of the collecting mechanism 5 is connected to the outer wall of the inner grinding unit 13 and the inner wall of the outer grinding unit 15 with a gap.

[0025] Furthermore, the stirring mechanism 3 includes a housing 6, a rotating motor 8, a stirring unit 9, a base plate 10, and a conical guide channel 12. The housing 6 has a feed inlet 7 at its upper end. The rotating motor 8 is located in the middle of the upper surface of the housing 6. The stirring unit 9 is located inside the housing 6. The output end of the rotating motor 8 is vertically inserted into the housing 6 and fixedly connected to the upper end of the stirring unit 9. The base plate 10 is located inside the housing 6 and below the stirring unit 9. An electric gate 11 is provided on the base plate 10. The conical guide channel 12 is located inside the housing 6 and at the lower end of the base plate 10.

[0026] Furthermore, the stirring unit 9 includes a rotating shaft 19 and multiple sets of stirring components. The upper end of the rotating shaft 19 is fixedly connected to the output end of the rotating motor 8. The multiple sets of stirring components are evenly distributed along the outer wall of the rotating shaft 19. Each set of stirring components includes multiple connecting columns 20 and multiple stirring blades 21. The multiple stirring blades 21 are evenly distributed along the axial direction of the rotating shaft 19 through the connecting columns 20. The angle between the multiple stirring blades 21 and the axial direction of the rotating shaft 19 increases sequentially from bottom to top.

[0027] Furthermore, the internal grinding unit 13 includes a column, an internal grinding layer 25, a second rotating motor 17, and a multi-directional material distribution assembly 14. The column is rotatably disposed in the middle of the upper end face of the workbench 1. The multi-directional material distribution assembly 14 is disposed in the column and located at the upper end of the column. Multiple through holes 2 are evenly distributed along the circumference on the side wall of the column. The upper end of the multi-directional material distribution assembly 14 is connected to the conical guide groove 12. The lower end of the multi-directional material distribution assembly 14 is connected to the corresponding through holes 2. The lower end of the outer wall of the column is provided with an internal grinding layer 25 below the multiple through holes 2. The second rotating motor 17 is disposed in the middle of the lower end face of the workbench 1. The output end of the second rotating motor 17 passes vertically upward through the workbench 1 and is fixedly connected to the middle of the lower end face of the column.

[0028] Furthermore, the multi-directional material distribution assembly 14 includes a main pipe 22 and multiple material distribution pipes 23. The upper end of the main pipe 22 is connected to the lower outlet of the conical guide channel 12, and the lower end of the main pipe 22 is connected to the upper ends of multiple inclined material distribution pipes 23 respectively. The discharge ports 24 at the lower ends of the multiple material distribution pipes 23 are respectively connected to the corresponding through holes 2.

[0029] Furthermore, the external grinding unit 15 includes an external grinding layer 26, a transition layer 27, and a fixing layer 28. The fixing layer 28 is disposed on the upper end face of the workbench 1 and sleeved on the outside of the column. The inner wall of the fixing layer 28 is provided with a transition layer 27, and the inner wall of the transition layer 27 is provided with an external grinding layer 26. The external grinding layer 26 is correspondingly disposed with the inner grinding layer 25. The inner wall of the external grinding layer 26 is in contact with the outer wall of the inner grinding layer 25 and there is a gap.

[0030] Furthermore, the collection mechanism 5 includes a conical member 16 and a collection groove 18. The conical member 16 is disposed on the lower end surface of the workbench 1, and the upper end of the conical member 16 extends out of the upper end surface of the workbench 1. The side wall of the conical member 16 has a gap. The gap between the inner wall of the outer grinding layer 26 and the inner grinding layer 25 is correspondingly arranged vertically with the gap of the side wall of the conical member 16. The lower end of the conical member 16 is connected to the collection groove 18.

[0031] Worktable 1: Worktable 1 is made of a robust metal material, such as stainless steel or cast iron, to ensure its stability and durability. A circular groove is pre-drilled in the center of the upper end face of the worktable for mounting and supporting the inner grinding unit 13 of the grinding mechanism 4. The lower end face of the worktable 1 is provided with a motor mounting base and a support structure for the collecting mechanism 5.

[0032] Stirring mechanism 3: The stirring mechanism 3 is installed above the grinding mechanism 4, and specifically includes:

[0033] Housing 6: Housing 6 is made of high-strength plastic or lightweight metal, and has a feed port 7 with a sealing cover on the top for easy input of raw materials.

[0034] Rotary motor 18: Rotary motor 18 is a high-speed, low-noise DC motor, which is fixed to the top center of housing 6 by a bracket, and its output shaft passes vertically downward through the top cover of housing 6.

[0035] Mixing Unit 9: Mixing Unit 9 consists of a rotating shaft 19 and multiple sets of mixing components fixed on the rotating shaft 19. The mixing components include multiple connecting columns 20 and mixing blades 21 evenly distributed around the circumference of the rotating shaft 19. The mixing blades 21 are made of wear-resistant alloy material to improve service life. The mixing blades 21 have a gradually increasing inclination angle from bottom to top to create better material flow and mixing effect.

[0036] Bottom plate 10: Bottom plate 10 is horizontally set at the bottom of shell 6, and an electric gate 11 is provided in the center to control the discharge of mixed materials.

[0037] Conical guide channel 12: The conical guide channel 12 is fixed below the base plate 10 and connected to the outlet of the electric gate 11. Its design helps the material to be smoothly introduced into the grinding mechanism 4.

[0038] Grinding mechanism 4: Grinding mechanism 4 includes an inner grinding unit 13 and an outer grinding unit 15, which are nested in the middle of the worktable.

[0039] Internal Grinding Unit 13: The internal grinding unit 13 consists of a column, an internal grinding layer 25, a second rotating motor 17, and a multi-directional material distribution assembly 14. The column has an internal cavity for installing the multi-directional material distribution assembly 14. The lower end of the outer wall of the column is fixed with the internal grinding layer 25, which is made of a high-hardness, wear-resistant material. The second rotating motor 17 is mounted on the lower end of the worktable and is fixedly connected to the lower end face of the column via a coupling, driving the column to rotate.

[0040] Multi-directional material distribution assembly 14: The multi-directional material distribution assembly 14 consists of a main pipe 22 and multiple distribution pipes 23. The main pipe 22 is fixed inside the upper end of the column and connected to the lower outlet of the conical guide channel 12. The multiple distribution pipes 23 are inclined and evenly distributed below the main pipe 22, and their lower outlets correspond one-to-one with the through holes 2 on the side wall of the column.

[0041] Outer grinding unit 15: The outer grinding unit includes a fixed layer 28, a transition layer 27, and an outer grinding layer 26. The fixed layer 28 is fixed on the worktable 1, and the transition layer 27 is an elastic material layer used to buffer and support the outer grinding layer 26. The outer grinding layer 26 is correspondingly arranged with the inner grinding layer 25 to form a tiny gap for fine grinding of materials.

[0042] Collection Mechanism 5: The collection mechanism 5 is located at the lower end of the workbench 1 and includes a conical component 16 and a collection trough 18. The upper end of the conical component 16 is connected to the lower end face of the workbench 1, and its side wall has an opening corresponding to the grinding gap. The ground material falls into the conical component 16 through the opening, and then flows into the collection trough 18 through the lower end of the conical component 16. The bottom of the collection trough 18 is equipped with a discharge valve to facilitate the discharge and collection of materials.

[0043] Operating procedures:

[0044] Raw material preparation: Mix the required raw materials in proportion and then feed them into the shell 6 through the feed inlet 7 of the stirring mechanism 3.

[0045] Mixing operation: Start the rotating motor 8 to drive the stirring unit 9 to rotate, and perform preliminary mixing of the raw materials. The mixing time is adjusted according to the characteristics of the raw materials and the required uniformity of mixing.

[0046] Material discharge: After mixing is completed, turn off the rotating motor 8 and open the electric gate 11 to allow the mixed material to fall into the conical guide trough 12.

[0047] Grinding operation: Start the rotating motor 17 to drive the inner grinding unit 13 to rotate. At the same time, the material in the conical guide channel 12 is evenly distributed to the through holes 2 on the side wall of the column through the multi-directional material distribution component 14, and enters the gap between the inner grinding layer 25 and the outer grinding layer 26 for fine grinding. The grinding time is adjusted according to the material characteristics and the required grinding fineness.

[0048] Material collection: After grinding is completed, turn off the rotating motor 17. The ground material falls into the collection tank 18 through the opening of the conical part 16. After the material in the collection tank 18 reaches a certain amount, open the discharge valve to discharge and collect the material.

[0049] Equipment cleaning and maintenance: Regularly clean the stirring mechanism 3, grinding mechanism 4, and collecting mechanism 5 to keep the inside of the equipment clean. At the same time, check the wear condition of each component and replace severely worn parts promptly to ensure the normal operation and service life of the equipment.

[0050] The raw material mixing device of this invention can achieve uniform mixing and fine grinding of raw materials, thereby improving production efficiency and product quality.

[0051] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A raw material mixing device for producing phosphorus-based anode materials, characterized in that: The system includes a workbench (1), a stirring mechanism (3), a grinding mechanism (4), and a collecting mechanism (5). The grinding mechanism (4) includes an inner grinding unit (13) and an outer grinding unit (15), which are nested together. The inner grinding unit (13) is rotatably disposed in the middle of the upper surface of the workbench (1), and the outer grinding unit (15) is disposed outside the inner grinding unit (13) and fixedly disposed with respect to the upper surface of the workbench (1). The outer wall of the inner grinding unit (13) and the inner wall of the outer grinding unit (15) are fitted together with a gap. The stirring mechanism (3) is disposed at the upper end of the inner grinding unit (13), and the lower end of the stirring mechanism (3) is connected to the upper end of the inner grinding unit (13). The collecting mechanism (5) is disposed at the lower end of the workbench (1), and the upper end of the collecting mechanism (5) is connected to the outer wall of the inner grinding unit (13) and the inner wall of the outer grinding unit (15) with a gap.

2. The raw material mixing apparatus for producing phosphorus-based anode materials according to claim 1, characterized in that: The stirring mechanism (3) includes a housing (6), a rotating motor (8), a stirring unit (9), a base plate (10), and a conical guide groove (12). The upper end of the housing (6) has a feed inlet (7). The rotating motor (8) is located in the middle of the upper end face of the housing (6). The stirring unit (9) is located inside the housing (6). The output end of the rotating motor (8) is vertically inserted into the housing (6) and fixedly connected to the upper end of the stirring unit (9). The base plate (10) is located inside the housing (6) and below the stirring unit (9). An electric gate (11) is provided on the base plate (10). The conical guide groove (12) is located inside the housing (6) and below the base plate (10).

3. The raw material mixing apparatus for producing phosphorus-based anode materials according to claim 2, characterized in that: The stirring unit (9) includes a rotating shaft (19) and multiple sets of stirring components. The upper end of the rotating shaft (19) is fixedly connected to the output end of the rotating motor (8). The multiple sets of stirring components are evenly distributed along the outer wall of the rotating shaft (19). Each set of stirring components includes multiple connecting columns (20) and multiple stirring blades (21). The multiple stirring blades (21) are evenly distributed along the axial direction of the rotating shaft (19) through the connecting columns (20). The angle between the multiple stirring blades (21) and the axial direction of the rotating shaft (19) increases sequentially from bottom to top.

4. The raw material mixing apparatus for producing phosphorus-based anode materials according to claim 3, characterized in that: The internal grinding unit (13) includes a column, an internal grinding layer (25), a second rotating motor (17), and a multi-directional material distribution assembly (14). The column is rotatably disposed in the middle of the upper end face of the workbench (1). The multi-directional material distribution assembly (14) is disposed in the column and located at the upper end of the column. Multiple through holes (2) are evenly distributed along the circumference on the side wall of the column. The upper end of the multi-directional material distribution assembly (14) is connected to the conical guide groove (12). The lower end of the multi-directional material distribution assembly (14) is connected to the corresponding through holes (2). The lower end of the outer wall of the column is provided with an internal grinding layer (25) below the multiple through holes (2). The second rotating motor (17) is disposed in the middle of the lower end face of the workbench (1). The output end of the second rotating motor (17) passes vertically upward through the workbench (1) and is fixedly connected to the middle of the lower end face of the column.

5. The raw material mixing apparatus for producing phosphorus-based anode materials according to claim 4, characterized in that: The multi-directional material distribution assembly (14) includes a main pipe (22) and multiple material distribution pipes (23). The upper end of the main pipe (22) is connected to the lower outlet of the conical guide channel (12), and the lower end of the main pipe (22) is connected to the upper end of multiple inclined material distribution pipes (23). The discharge ports (24) at the lower ends of the multiple material distribution pipes (23) are connected to the corresponding through holes (2).

6. The raw material mixing apparatus for producing phosphorus-based anode materials according to claim 5, characterized in that: The external grinding unit (15) includes an external grinding layer (26), a transition layer (27) and a fixing layer (28). The fixing layer (28) is set on the upper end face of the workbench (1) and sleeved on the outside of the column. The inner wall of the fixing layer (28) is provided with a transition layer (27). The inner wall of the transition layer (27) is provided with an external grinding layer (26). The external grinding layer (26) is correspondingly set with the inner grinding layer (25). The inner wall of the external grinding layer (26) is attached to the outer wall of the inner grinding layer (25) and there is a gap.

7. The raw material mixing apparatus for producing phosphorus-based anode materials according to claim 6, characterized in that: The collecting mechanism (5) includes a conical part (16) and a collecting groove (18). The conical part (16) is set on the lower end surface of the workbench (1). The upper end of the conical part (16) extends out of the upper end surface of the workbench (1). The side wall of the conical part (16) has a gap. The gap between the inner wall of the outer grinding layer (26) and the inner grinding layer (25) is correspondingly set with the gap of the side wall of the conical part (16). The lower end of the conical part (16) is connected to the collecting groove (18).

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