Device for continuously optimizing hard carbon negative electrode material

Abstract

The utility model discloses a device for continuously optimizing a hard carbon negative electrode material. The device comprises a charging barrel, drying equipment and a stirrer, stirring blades are arranged at one end of the stirrer and located in an inner cavity of the charging barrel, a feeding port is formed in the top of the charging barrel, and a liquid outlet is formed in the charging barrel; the drying equipment comprises a dryer, a discharger and a liquid collector for collecting material liquid flowing out of a liquid outlet of the charging barrel; one end of the liquid collector is arranged below a liquid outlet of the charging barrel, the other end of the liquid collector is communicated with a liquid inlet of the dryer, a discharging port of the dryer is communicated and connected with one end of the discharging device, and the other end of the discharging device is arranged right above the feeding port. The device realizes continuous and efficient layered optimization and drying of the hard carbon negative electrode material, and is simple and convenient to operate, high in sorting precision and suitable for industrial popularization and application.

Description

Technical Field

[0001] This utility model relates to the field of battery material preparation technology, specifically to a device for continuously selecting hard carbon anode materials. Background Technology

[0002] In the battery material preparation process, the performance of hard carbon anode materials directly affects the overall battery performance. However, the prepared hard carbon anode material powder is not uniform, containing many defective particles, which affects battery performance and lifespan. Therefore, how to effectively select a hard carbon anode material with superior performance and greater uniformity has become an urgent problem to be solved. Utility Model Content

[0003] The purpose of this invention is to provide a device for continuous optimization of hard carbon anode materials. This device is used to perform layered optimization of hard carbon anode materials, which can not only improve the performance of hard carbon anode materials, but also achieve continuous optimization and improve the optimization efficiency.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] An apparatus for continuously selecting hard carbon anode materials includes a feed cylinder, a drying device, and a stirrer. One end of the stirrer is equipped with a stirring blade located within the inner cavity of the feed cylinder. The top of the feed cylinder has a feed inlet, and the feed cylinder also has a liquid outlet. The drying device includes a dryer, a discharge device, and a liquid collector for collecting the liquid flowing from the liquid outlet of the feed cylinder. One end of the liquid collector is located below the liquid outlet of the feed cylinder, and the other end of the liquid collector is connected to the liquid inlet of the dryer. The discharge outlet of the dryer is connected to one end of the discharge device, and the other end of the discharge device is positioned directly above the feed inlet.

[0006] The aforementioned apparatus for continuously selecting hard carbon anode materials includes valves at the outlets of the feed cylinder for controlling the on / off state of the outlets. The feed cylinder outlets include a first outlet and a second outlet, wherein the first outlet is located on the side wall of the feed cylinder, and the second outlet is located on the bottom wall of the feed cylinder. By installing valves at the outlets of the feed cylinder and placing the first and second outlets at different heights of the feed cylinder, the outflow of the liquid can be controlled more flexibly, facilitating the selection of different outlet positions for liquid discharge according to actual needs.

[0007] The aforementioned apparatus for continuously selecting hard carbon anode materials includes a liquid collector comprising a first liquid collector and a second liquid collector; wherein the first liquid collector includes a first liquid collecting head and a first liquid collecting tube, the first liquid collecting head being connected to one end of the first liquid collecting tube and positioned below the first liquid outlet; the other end of the first liquid collecting tube is connected to the liquid inlet of the dryer.

[0008] The second liquid collector includes a second liquid collecting head and a second liquid collecting pipe. The second liquid collecting head is connected to one end of the second liquid collecting pipe and is located directly below the second liquid outlet. The other end of the second liquid collecting pipe is connected to the liquid inlet of the dryer.

[0009] The aforementioned apparatus for continuously selecting hard carbon anode materials features a first and second liquid collecting head that are both funnel-shaped with a large upper diameter and a small lower diameter. The diameter of the upper opening of the first liquid collecting head is larger than the diameter of the first liquid outlet, and the diameter of the upper opening of the second liquid collecting head is larger than the diameter of the second liquid outlet. The lower opening of the first liquid collecting head is connected to the first liquid collecting pipe, and the lower opening of the second liquid collecting head is connected to the second liquid collecting pipe. Designing the first and second liquid collecting heads as funnel-shaped structures with a large upper diameter and a small lower diameter, and ensuring that the diameter of the upper opening is larger than the corresponding liquid outlet diameter, effectively receives the liquid flowing from the outlet and prevents spillage.

[0010] The aforementioned apparatus for continuously selecting hard carbon anode materials has the following connection: one end of the first liquid collecting pipe is conductively connected to the middle of the second liquid collecting pipe, and the second liquid collecting pipe is connected to the liquid inlet of the dryer. A drain pipe is conductively connected to the wall of the second liquid collecting pipe facing the ground, with the end of the drain pipe away from the second liquid collecting pipe facing the ground. A filter screen is installed in the cavity of the drain pipe. The conductive connection between the middle of the first and second liquid collecting pipes simplifies the piping. The design of the drain pipe allows for effective liquid diversion and discharge, thereby improving drying efficiency and quality. The filter screen in the drain pipe can block the selected hard carbon powder, ensuring that the liquid flowing out of the drain pipe does not contain hard carbon powder.

[0011] In the aforementioned apparatus for continuous selection of hard carbon anode materials, the other end of the first liquid collecting pipe is directly connected to the liquid inlet of the dryer; both the ground-facing walls of the first and second liquid collecting pipes are conductively connected to drain pipes, with the ends of the drain pipes furthest from the first and second liquid collecting pipes facing the ground; a filter screen is installed in the cavity of each drain pipe. Connecting the first and second liquid collecting pipes to the liquid inlet of the dryer allows for full utilization of both pipes during two consecutive sorting operations, reducing the number of cleaning cycles and improving selection efficiency.

[0012] The aforementioned apparatus for continuously selecting hard carbon anode materials includes a discharge device comprising a discharge pipe and a discharge head, wherein one end of the discharge pipe is connected in a conductive manner to the discharge port of the dryer, and the other end of the discharge pipe is connected to the discharge head, which is arranged directly above the feed inlet.

[0013] The aforementioned apparatus for continuously selecting hard carbon anode materials features a funnel-shaped discharge head and inlet, both with a larger upper diameter and a smaller lower diameter. The upper opening of the discharge head is connected to the discharge pipe, while the lower opening of the discharge head faces the upper opening of the inlet, with the diameter of the lower opening being smaller than that of the upper opening. This design effectively guides the dried, selected hard carbon powder into the inlet for continuous selection or collection, while preventing powder spillage. This design enhances the continuity and automation of the selection process.

[0014] The aforementioned apparatus for continuously selecting hard carbon anode materials includes a blower installed on the discharge pipe.

[0015] The aforementioned apparatus for continuously selecting hard carbon anode materials further includes a fixing frame for fixing the material cylinder.

[0016] The technical solution of this utility model has achieved the following beneficial technical effects:

[0017] 1. The apparatus for continuous selection of hard carbon anode materials provided by this utility model achieves continuous stratified selection of hard carbon anode materials. By using solutions of different densities, this apparatus can separate hard carbon powder into layers in the sorting solution, achieving efficient separation of high-performance materials. The stirrer fully disperses the hard carbon powder in the sorting solution and separates hard carbon powders of different densities, further improving the accuracy of sorting. This apparatus is not only easy to operate, but also can efficiently separate high-performance, uniformly sized high-quality materials from mixed hard carbon anode material powder, improving the overall efficiency and material quality of selection.

[0018] 2. The first and second liquid collecting heads in the continuous selection device for hard carbon anode materials provided by this utility model are designed in a trumpet shape, with the upper opening diameter larger than the corresponding outlet diameter. Furthermore, the positioning of the discharge device and the feed inlet of the drying cylinder in the device facilitates the continuous selection of hard carbon powder, meeting the needs of continuous industrial operation. The shapes of the first and second liquid collecting heads, the discharge head, and the feed inlet are all designed to prevent leakage of liquid or powder during transfer, improving the collection efficiency of liquid and powder. In addition, the design of the discharge pipe reduces the amount of liquid entering the dryer, increasing the drying rate. The device provided by this utility model effectively reduces environmental pollution and material waste, conforming to the concept of green and environmentally friendly production. Attached Figure Description

[0019] Figure 1 This utility model provides a schematic diagram of the structure of a device for continuously optimizing hard carbon anode materials.

[0020] The reference numerals in the figure are as follows: 1-material cylinder; 101-feed inlet; 102-first liquid outlet; 103-second liquid outlet; 2-drying equipment; 201-first liquid collecting head; 202-second liquid collecting head; 203-first liquid collecting pipe; 204-second liquid collecting pipe; 205-dryer; 206-discharge pipe; 207-discharge head; 208-discharge pipe; 3-stirrer; 4-fixed frame. Detailed Implementation

[0021] Example 1

[0022] Because the hard carbon anode material powder (hard carbon powder) prepared by existing technologies has inconsistent properties, it contains many defective particles. The density of defective and defect-free hard carbon powder particles usually differs, leading to stratification in the sorting solution. This phenomenon can be used to optimize the hard carbon powder. Furthermore, after the first optimization, some hard carbon powder particles with smaller defects will still remain, and their density will be close to that of the defect-free particles, making them difficult to separate. In this case, the density of the sorting solution can be increased to perform a second optimization on the hard carbon powder after the first optimization, further removing the smaller defects and obtaining purer, defect-free hard carbon powder.

[0023] In this embodiment, an apparatus for continuously selecting hard carbon anode materials is provided.

[0024] like Figure 1As shown, the apparatus for continuously selecting hard carbon anode materials in this embodiment includes a material cylinder 1, a drying device 2, a stirrer 3, and a fixing frame 4. The material cylinder 1 is fixed by the fixing frame 4. The top of the material cylinder 1 is provided with a feed inlet 101 for adding hard carbon powder (i.e., hard carbon anode material powder) and a sorting solution; the bottom of the material cylinder is provided with a second liquid outlet 103, and the side wall is provided with a first liquid outlet 102. Valves for controlling the opening and closing of the liquid outlets are respectively provided at the first liquid outlet 102 and the second liquid outlet 103. One end of the stirrer 3 is provided with a stirring blade, which is located in the inner cavity of the material cylinder for uniformly stirring the hard carbon powder and the sorting solution.

[0025] The drying equipment 2 includes a dryer 205, a discharge device, and a liquid collector for collecting the liquid flowing out of the liquid outlet of the material cylinder 1. The liquid collector includes a first liquid collector and a second liquid collector, which are used to collect the liquid flowing out from the first liquid outlet 102 and the second liquid outlet 103, respectively. The liquid is a mixture of hard carbon powder and sorting solution.

[0026] The first liquid collector includes a first liquid collecting head 201 and a first liquid collecting pipe 203. The first liquid collecting head 201 is connected to one end of the first liquid collecting pipe 203; the other end of the first liquid collecting pipe 203 is connected to the liquid inlet of the dryer 205. The first liquid collecting head 201 is located below the first liquid outlet 102, and the upper part of the first liquid collecting head 201 surrounds the area where the liquid flowing out of the first liquid outlet 102 falls naturally.

[0027] When the hard carbon powder that needs to be retained in the barrel 1 is above the position of the first liquid outlet 102, the valve of the first liquid outlet 102 can be opened. At this time, the sorting solution (i.e., liquid) carrying the hard carbon powder in the barrel 1 flows out from the first liquid outlet 102, falls naturally under the action of gravity, and is received by the first liquid collecting head 201.

[0028] The second liquid collector includes a second liquid collecting head 202 and a second liquid collecting pipe 204. The second liquid collecting head 202 is connected to one end of the second liquid collecting pipe 204 and is located directly below the second liquid outlet 103. The other end of the second liquid collecting pipe 204 is connected to the liquid inlet of the dryer 205.

[0029] Both the first liquid collecting head 201 and the second liquid collecting head 202 are funnel-shaped with a large upper diameter and a small lower diameter; the diameter of the upper opening of the first liquid collecting head 201 is larger than the diameter of the first liquid outlet 102, and the diameter of the upper opening of the second liquid collecting head 202 is larger than the diameter of the second liquid outlet 103.

[0030] In this embodiment, when the liquid material in the barrel flows out from the first outlet 102 or the second outlet 103, it falls freely into the first collecting head 201 or the second collecting head 202. The diameter of the upper opening of both the first collecting head 201 and the second collecting head 202 is relatively large, which helps to prevent liquid spillage. At the same time, there is no direct connection between the first collecting head 201 and the first outlet 102, or between the second outlet 103 and the second collecting head 202. This design is more conducive to the selection of hard carbon. Regardless of whether the hard carbon powder to be discarded after selection flows out from the first outlet 102 or the second outlet 103, the sorting solution containing the waste hard carbon powder can be received in a separate container at the corresponding outlet. There is no need to disassemble the existing equipment, and the sorting solution containing the waste hard carbon powder will not re-enter the dryer 205. The operation is convenient and it is not easy to cause contamination to the inside of the dryer 205.

[0031] In this embodiment, both the first liquid collecting pipe 203 and the second liquid collecting pipe 204 are connected to the liquid inlet of the dryer 205. The end of the second liquid collecting pipe 204 away from the second liquid collecting head 202 is directly connected to the liquid inlet of the dryer 205. The other end of the first liquid collecting pipe 203 (that is, the end of the first liquid collecting pipe 203 away from the first liquid collecting head 201) is connected to the middle of the second liquid collecting pipe 204. That is, the end of the first liquid collecting pipe 203 away from the first liquid collecting head 201 is not directly connected to the liquid inlet of the dryer 205, but is connected to the liquid inlet of the dryer 205 through the second liquid collecting pipe 204. This makes the pipeline layout simpler.

[0032] Generally, during the first separation, after the hard carbon powder in the feed cylinder 1 is separated into multiple layers in the separation solution, only one layer of hard carbon powder is retained, usually the bottommost layer. Therefore, the first collecting pipe 203 is used less frequently. Thus, the first collecting pipe 203 is connected to the middle of the second collecting pipe 204 to save material. During the second separation, when the density of the separation solution is higher, the bottommost layer of hard carbon powder in the feed cylinder 1 (this portion of hard carbon powder is the desired hard carbon powder) is positioned above the first outlet 102 during the first separation. This portion of hard carbon powder can then be directly discharged through the first outlet 102.

[0033] In this embodiment, a drain pipe 208 is connected to the wall of the second liquid collecting pipe 204 facing the ground, with the end of the drain pipe 208 away from the second liquid collecting pipe 204 facing the ground; a filter screen is provided in the cavity of the drain pipe 208. During the process of the sorting solution carrying the preferred hard carbon powder (i.e., the desired, high-performance hard carbon powder) flowing into the dryer 205 through the second liquid collecting pipe 204, a portion of the sorting solution is discharged from the second liquid collecting pipe 204 through the drain pipe 208. Because the filter screen in the drain pipe 208 can block the preferred hard carbon powder, the preferred hard carbon powder remains in the second liquid collecting pipe 204 and enters the dryer 205 along with the remaining sorting solution in the second liquid collecting pipe 204. The design of the drain pipe 208 reduces the amount of liquid entering the dryer 205, lightens the workload of the dryer 205, and accelerates the drying rate.

[0034] The discharge port of the dryer 205 is connected to a discharge device, through which the dried preferred hard carbon powder is output. The discharge device includes a discharge pipe 206 and a discharge head 207, wherein one end of the discharge pipe 206 is conductively connected to the discharge port of the dryer 205, and the discharge head 207 is connected to the other end of the discharge pipe 206 (i.e., the end away from the dryer 205).

[0035] The discharge head 207 is positioned directly above the feed inlet 101. Both the discharge head 207 and the feed inlet 101 are funnel-shaped with a larger upper diameter and a smaller lower diameter. The upper opening of the discharge head 207 is connected to the discharge pipe 206, and the lower opening of the discharge head 207 faces the upper opening of the feed inlet 101, with the diameter of the lower opening of the discharge head 207 being smaller than the diameter of the upper opening of the feed inlet 101. When further refining of the hard carbon powder dried by the dryer 205 is required, the dried hard carbon powder falls into the feed inlet 101 through the discharge head 207. Because the diameter of the lower opening of the discharge head 207 is smaller than the diameter of the upper opening of the feed inlet 101, the hard carbon powder is less likely to spill.

[0036] A specific process flow for selecting hard carbon powder using the apparatus in this embodiment is as follows:

[0037] 1. Add the hard carbon anode material powder (i.e., hard carbon powder) into the feed cylinder through the feed port.

[0038] 2. Add the sorting solution into the feed cylinder through the feed inlet, stir to fully disperse the hard carbon powder in the sorting solution, and then let it stand for a period of time until the hard carbon powder is stably separated into layers.

[0039] 3. After the hard carbon powder has stabilized and separated into layers, open the valve at the second liquid outlet 103 to allow the sorting solution carrying the preferred hard carbon powder to flow into the second liquid collector through the second liquid outlet, and then into the dryer 205. After all the preferred hard carbon powder in the material cylinder 1 has entered the second liquid collector, open the valves at all liquid outlets of the material cylinder 1 to discharge and discard the remaining sorting solution and hard carbon powder in the material cylinder.

[0040] 4. The dryer 205 dries the hard carbon powder to obtain the final preferred hard carbon anode material powder. The preferred hard carbon anode material powder can be collected at the discharge head 207, or it can continue to flow into the feed cylinder from the feed inlet 101 and be further preferred using sorting solutions of different densities.

[0041] Example 2

[0042] This embodiment provides an apparatus for continuously selecting hard carbon anode materials. The only difference between the apparatus for continuously selecting hard carbon anode materials provided in this embodiment and that in Embodiment 1 is that, in this embodiment, the other end of the first liquid collecting pipe 203 (i.e., the end of the first liquid collecting pipe 203 away from the first liquid collecting head 201) is directly connected to the liquid inlet of the dryer 205; both the wall of the first liquid collecting pipe 203 facing the ground and the wall of the second liquid collecting pipe 204 facing the ground are connected to a drain pipe 208; the ends of the drain pipe 208 away from the first liquid collecting pipe 203 and the ends of the drain pipe 208 away from the second liquid collecting pipe 204 are both facing the ground.

[0043] When the hard carbon powder in the feed cylinder 1 is continuously selected twice, and the height position of the selected hard carbon powder in the feed cylinder 1 is different during the two consecutive selections, the device in this embodiment is relatively convenient. For example, in the first selection, the position of the selected hard carbon powder layer is below the first liquid outlet. At this time, the selected hard carbon powder can be discharged through the second liquid outlet 103 and enter the second liquid collector, and further enter the dryer 205 through the second liquid collection pipe 204 for drying. Then, the inner cavity of the dryer 205 is cleaned for use in the second selection. In the second selection, due to the change in the density of the sorting solution, the position of the selected hard carbon powder layer is above the first liquid outlet 102. At this time, the sorting solution carrying the selected hard carbon powder can be discharged through the first liquid outlet 102 and enter the dryer 205 through the first liquid collection pipe 203 for drying. It is not necessary to clean the second liquid collection pipe 204 again. That is to say, compared with the device in Embodiment 1, the device in this embodiment saves one cleaning step of the liquid collection pipe, which can improve the sorting efficiency.

[0044] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. An apparatus for continuously selecting hard carbon anode materials, characterized in that, The device includes a material cylinder (1), a drying device (2), and a stirrer (3). One end of the stirrer (3) is provided with a stirring blade, which is located in the inner cavity of the material cylinder (1). The top of the material cylinder (1) is provided with a feed inlet (101), and the material cylinder (1) is provided with a liquid outlet. The drying device (2) includes a dryer (205), a discharge device, and a liquid collector for collecting the liquid flowing out of the liquid outlet of the material cylinder (1). One end of the liquid collector is located below the liquid outlet of the material cylinder (1), and the other end of the liquid collector is connected to the liquid inlet of the dryer (205). The discharge outlet of the dryer (205) is connected to one end of the discharge device, and the other end of the discharge device is arranged directly above the feed inlet (101).

2. The apparatus for continuously selecting hard carbon anode materials according to claim 1, characterized in that, The liquid outlet of the material cylinder (1) is provided with a valve for controlling the opening and closing of the liquid outlet; the liquid outlet of the material cylinder (1) includes a first liquid outlet (102) and a second liquid outlet (103), wherein the first liquid outlet (102) is provided on the side wall of the material cylinder (1) and the second liquid outlet (103) is provided on the bottom wall of the material cylinder (1).

3. The apparatus for continuously selecting hard carbon anode materials according to claim 2, characterized in that, The liquid collector includes a first liquid collector and a second liquid collector; wherein, the first liquid collector includes a first liquid collecting head (201) and a first liquid collecting pipe (203), the first liquid collecting head (201) is connected to one end of the first liquid collecting pipe (203), and the first liquid collecting head (201) is located below the first liquid outlet (102); the other end of the first liquid collecting pipe (203) is connected to the liquid inlet of the dryer (205); The second liquid collector includes a second liquid collecting head (202) and a second liquid collecting pipe (204). The second liquid collecting head (202) is connected to one end of the second liquid collecting pipe (204) and is located directly below the second liquid outlet (103). The other end of the second liquid collecting pipe (204) is connected to the liquid inlet of the dryer (205).

4. The apparatus for continuously selecting hard carbon anode materials according to claim 3, characterized in that, Both the first liquid collecting head (201) and the second liquid collecting head (202) are funnel-shaped with a large upper diameter and a small lower diameter. The diameter of the upper opening of the first liquid collecting head (201) is larger than the diameter of the first liquid outlet (102), and the diameter of the upper opening of the second liquid collecting head (202) is larger than the diameter of the second liquid outlet (103). The lower opening of the first liquid collecting head (201) is connected to the first liquid collecting pipe (203), and the lower opening of the second liquid collecting head (202) is connected to the second liquid collecting pipe (204).

5. The apparatus for continuously selecting hard carbon anode materials according to claim 3, characterized in that, The other end of the first liquid collecting pipe (203) is connected to the middle of the second liquid collecting pipe (204) and is connected to the liquid inlet of the dryer (205) through the second liquid collecting pipe (204); a liquid discharge pipe (208) is connected to the pipe wall of the second liquid collecting pipe (204) facing the ground, and the end of the liquid discharge pipe (208) away from the second liquid collecting pipe (204) faces the ground; a filter screen is provided in the cavity of the liquid discharge pipe (208).

6. The apparatus for continuously selecting hard carbon anode materials according to claim 3, characterized in that, The other end of the first liquid collecting pipe (203) is directly connected to the liquid inlet of the dryer (205); both the wall of the first liquid collecting pipe (203) facing the ground and the wall of the second liquid collecting pipe (204) facing the ground are connected to a drain pipe (208), and the ends of the drain pipe (208) away from the first liquid collecting pipe (203) and the ends of the drain pipe (208) away from the second liquid collecting pipe (204) are facing the ground; a filter screen is provided in the cavity of the drain pipe (208).

7. The apparatus for continuously selecting hard carbon anode materials according to claim 1, characterized in that, The discharge device includes a discharge pipe (206) and a discharge head (207), wherein one end of the discharge pipe (206) is connected to the discharge port of the dryer (205), and the other end of the discharge pipe (206) is connected to the discharge head (207), and the discharge head (207) is arranged directly above the feed inlet (101).

8. The apparatus for continuously selecting hard carbon anode materials according to claim 7, characterized in that, Both the discharge head (207) and the inlet (101) are funnel-shaped with a large upper diameter and a small lower diameter. The upper opening of the discharge head (207) is connected to the discharge pipe (206), and the lower opening of the discharge head (207) faces the upper opening of the inlet (101). The diameter of the lower opening of the discharge head (207) is smaller than the diameter of the upper opening of the inlet (101).

9. The apparatus for continuously selecting hard carbon anode materials according to claim 7, characterized in that, A blower is installed on the discharge pipe (206).

10. The apparatus for continuously selecting hard carbon anode materials according to any one of claims 1-9, characterized in that, The apparatus for continuously selecting hard carbon anode materials further includes a fixing frame (4) for fixing the barrel (1).

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