Cathode material coating device

Abstract

The utility model provides a coating device for a negative electrode material, and belongs to the technical field of battery negative electrode materials. The negative electrode material coating device comprises a bottom frame, a gas phase coating cylinder, a driving assembly, a conveying structure, a first end cover, a second end cover, a feeding structure, a discharging structure, a gas inlet structure and a gas outlet structure. A negative electrode material to be treated is input into one end in the gas-phase coating cylinder through the feeding structure, the conveying structure conveys the negative electrode material in the gas-phase coating cylinder, the gas inlet structure inputs carbon atom airflow into the gas-phase coating cylinder, the gas-phase coating cylinder is driven to rotate, and the negative electrode material is conveyed into the gas-phase coating cylinder through the conveying structure. The rotation of the gas phase coating cylinder and the conveying of the conveying structure are matched with the convective carbon atom gas flow, so that the sufficient contact between the negative electrode material and the carbon atom gas flow is ensured, the coating efficiency and uniformity are improved, and the problem that the overall efficiency is relatively low due to the intermittent treatment characteristic of the existing negative electrode material gas phase coating device is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery negative electrode material technical field, specifically related to a kind of coating device of negative electrode material. BACKGROUND

[0002] Negative electrode material processing refers to a series of processing and modification to raw materials used for battery negative electrode to improve its electrochemical performance, cycle stability, safety and economy, etc., and negative electrode material plays a key role in storing and releasing energy in battery, so its performance directly affects the overall performance of battery.

[0003] During negative electrode material processing, gas phase coating treatment is generally carried out to form a protective film on the surface of negative electrode material to improve the performance and stability of battery. It decomposes carbon atoms by heating carbon source gas, and completes surface coating by full contact with negative electrode material. However, in order to ensure sufficient contact, rotation or stirring is generally used in closed cylinder to improve efficiency, because there are interruptions in the process of negative electrode material coating, which cannot be continuously processed, resulting in low overall coating efficiency. SUMMARY

[0004] The utility model aims at the deficiency of prior art, and provides a kind of coating device of negative electrode material.

[0005] The utility model provides a kind of coating device of negative electrode material, including chassis, rotation setting in the gas phase coating cylinder of two ends of chassis and opening setting, drive assembly for driving gas phase coating cylinder rotation is set on chassis, conveying structure for conveying negative electrode material is set in gas phase coating cylinder, first end cover is connected to one end of gas phase coating cylinder, second end cover is connected to the other end of gas phase coating cylinder, feed structure is connected on first end cover, discharge structure is connected on second end cover, gas inlet structure is connected on second end cover, gas outlet structure is connected on first end cover;The feed structure is used to input the negative electrode material to be processed into one end in gas phase coating cylinder, the discharge structure is used to guide the negative electrode material coated from the other end in gas phase coating cylinder, the gas inlet structure is used to input carbon atom gas flow into gas phase coating cylinder, and the gas outlet structure is used to guide carbon atom gas flow from gas phase coating cylinder.

[0006] Further, the conveying structure is a spiral blade provided on the inner wall of the gas phase coating cylinder.

[0007] Further, the drive assembly includes a mounting seat fixed on the chassis, two idlers symmetrically arranged about the axis of the gas phase coating cylinder, and a drive motor fixed on the mounting seat and having an output end connected to one of the idlers. Both idlers are rotatably connected to the mounting seat, and both idlers abut against the outer wall of the gas phase coating cylinder.

[0008] Further, the first end cover is rotationally connected to the gas phase coating cylinder, the feeding structure comprises a feeding port penetratingly arranged on the first end cover, and a screw feeding valve fixedly installed on the first end cover at the feeding port.

[0009] Further, the second end cover is rotationally connected to the gas phase coating cylinder, the discharging structure comprises a discharging port penetratingly arranged on the second end cover, and a screw discharging valve fixedly installed on the second end cover at the discharging port.

[0010] Further, the gas inlet structure comprises a gas inlet port penetratingly arranged on the second end cover, and a gas inlet pipe fixedly installed on the second end cover at the gas inlet port.

[0011] Further, the gas outlet structure comprises a gas outlet port penetratingly arranged on the first end cover, and a gas outlet pipe fixedly installed on the first end cover at the gas outlet port.

[0012] Further, the first end cover and the second end cover are connected to the end of the gas phase coating cylinder through sealing bearings.

[0013] Further, the center line of the gas inlet port coincides with the axis of the gas phase coating cylinder, and the discharging port is arranged at the bottom of the second end cover.

[0014] Further, the gas outlet port is arranged above the feeding port.

[0015] The coating device for negative electrode material has the following beneficial effects:

[0016] The feeding structure inputs the negative electrode material to be treated into the gas phase coating cylinder, the conveying structure conveys the negative electrode material in the gas phase coating cylinder, the gas inlet structure inputs the carbon atom gas flow into the gas phase coating cylinder, the driving assembly drives the rotation of the gas phase coating cylinder, and the rotation of the gas phase coating cylinder and the conveying of the conveying structure ensure the sufficient contact of the negative electrode material and the carbon atom gas flow in the convection carbon atom gas flow, thereby improving the coating efficiency and uniformity and solving the problem of low overall efficiency of the existing negative electrode material gas phase coating device due to the intermittent treatment characteristics. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application. In the drawings, like reference numerals are used to represent similar elements. The drawings in the following description are some embodiments of the present application, not all embodiments. For those skilled in the art, other drawings can be obtained from these drawings without creative labor.

[0018] Figure 1A structure schematic view of the coating device for negative material of the utility model embodiment;

[0019] Figure 2 A structure schematic view of the driving assembly in the coating device for negative material of the utility model embodiment;

[0020] Figure 3 A structure schematic view of the inside of the gas phase coating cylinder in the coating device for negative material of the utility model embodiment;

[0021] Figure 4 A partial structure schematic view of the first end cover in the coating device for negative material of the utility model embodiment;

[0022] Figure 5 A partial structure schematic view of the second end cover in the coating device for negative material of the utility model embodiment.

[0023] In the drawing: 1 - underframe, 2 - gas phase coating cylinder, 21 - spiral blade, 3 - first end cover, 4 - second end cover, 5 - feed structure, 51 - screw feed valve, 52 - feed port, 6 - discharge structure, 61 - screw discharge valve, 62 - discharge port, 7 - air inlet structure, 71 - air inlet pipe, 72 - air inlet, 8 - air outlet structure, 81 - air outlet pipe, 82 - air outlet, 9 - driving assembly, 91 - mounting seat, 92 - carrier roller, 93 - driving motor. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the utility model embodiments clearer, the technical scheme in the utility model embodiments will be described clearly and completely below in combination with the drawings in the utility model embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in any way without conflict.

[0025] Please refer to Figures 1-5The utility model discloses a kind of coating devices of negative electrode material, including chassis 1, rotationally arranged in the open setting of both ends of chassis 1 gas phase coating cylinder 2, setting on chassis 1 to drive gas phase coating cylinder 2 rotation drive assembly 9, setting in gas phase coating cylinder 2 to be used to transport negative electrode material conveying structure, connect in the first end cover 3 of one end of gas phase coating cylinder 2, connect in the second end cover 4 of the other end of gas phase coating cylinder 2, connect on the feed structure 5 of first end cover 3, connect on the discharge structure 6 of second end cover 4, connect on the air inlet structure 7 of second end cover 4, connect on the air outlet structure 8 of first end cover 3;Feed structure 5 is used to input the negative electrode material to be handled in one end of gas phase coating cylinder 2, discharge structure 6 is used to export the negative electrode material from the other end in gas phase coating cylinder 2, air inlet structure 7 is used to input carbon atom gas stream in gas phase coating cylinder 2, air outlet structure 8 is used to export carbon atom gas stream from gas phase coating cylinder 2.

[0026] Here, both ends of gas phase coating cylinder 2 are open setting, first end cover 3 is connected to one end of gas phase coating cylinder 2, to seal the opening on one end of gas phase coating cylinder 2, second end cover 4 is connected to the other end of gas phase coating cylinder 2, to seal the opening on the other end of gas phase coating cylinder 2;Feed structure 5 imports the negative electrode material to be handled in one end of gas phase coating cylinder 2, that is, feed structure 5 imports the negative electrode material to be handled in one end of gas phase coating cylinder 2 close to first end cover 3, drive assembly 9 drives gas phase coating cylinder 2 to rotate, conveying structure transports the negative electrode material in one end of gas phase coating cylinder 2 to the other end in gas phase coating cylinder 2;Air inlet structure 7 imports carbon atom gas stream in gas phase coating cylinder 2, that is, air inlet structure 7 imports carbon atom gas stream in one end of gas phase coating cylinder 2 close to second end cover 4, air outlet structure 8 exports carbon atom gas stream from gas phase coating cylinder 2, then carbon atom gas stream moves in gas phase coating cylinder 2 from one end close to second end cover 4 to one end close to first end cover 3, and conveying structure transports the negative electrode material in gas phase coating cylinder 2 from one end close to first end cover 3 to one end close to second end cover 4, so that the negative electrode material contacts carbon atom gas stream, discharge structure 6 exports the negative electrode material coated from the other end in gas phase coating cylinder 2, to complete the coating of negative electrode material;Drive assembly 9 drives gas phase coating cylinder 2 to rotate, conveying structure transports the negative electrode material in one end of gas phase coating cylinder 2 to the other end in gas phase coating cylinder 2, realizes the continuous conveying and coating of negative electrode material, avoids the efficiency problem caused by traditional intermittent processing, solves the problem that the existing negative electrode material gas phase coating device in background art causes low overall efficiency due to the characteristics of intermittent processing.

[0027] Conveying structure can be spiral blade 21 arranged in the inner wall of gas phase coating cylinder 2.

[0028] Specifically, the driving assembly 9 drives the gas phase coating cylinder 2 to rotate, and the spiral blade 21 is used for conveying the negative electrode material in the gas phase coating cylinder 2. When the gas phase coating cylinder 2 rotates, the spiral blade 21 pushes the negative electrode material from one end of the gas phase coating cylinder 2 close to the first end cover 3 to the other end of the gas phase coating cylinder 2 close to the second end cover 4, so that the continuous conveying and coating of the negative electrode material are realized, the efficiency problem caused by the traditional intermittent treatment is avoided, the rotation of the gas phase coating cylinder 2 and the pushing of the spiral blade 21 cooperate with the carbon atom gas flow to ensure the sufficient contact between the negative electrode material and the carbon atom gas flow, and the coating efficiency and uniformity are improved.

[0029] The driving assembly 9 can include a mounting seat 91 fixed to the chassis 1, two idlers 92 symmetrically arranged about the axis of the gas phase coating cylinder 2, and a driving motor 93 fixed to the mounting seat 91 and having an output end connected to one of the idlers 92. Both of the idlers 92 are rotationally connected to the mounting seat 91, and both of the idlers 92 abut against the outer wall of the gas phase coating cylinder 2.

[0030] Specifically, the driving assembly 9 can be symmetrically arranged in two, and the two driving assemblies 9 can be symmetrically arranged about the center line of the side surface of the gas phase coating cylinder 2. The two driving assemblies 9 jointly drive the gas phase coating cylinder 2 to rotate. The motor drives the idler 92 to rotate, thereby driving the continuous and stable rotation of the gas phase coating cylinder 2 in contact with the idler 92. The driving assembly 9 has a simple structure and is easy to maintain.

[0031] The first end cover 3 can be rotationally connected to the gas phase coating cylinder 2. The feeding structure 5 includes a feeding port 52 penetratingly arranged on the first end cover 3 and a screw feeding valve 51 fixedly installed on the first end cover 3 at the feeding port 52.

[0032] Specifically, the outer side wall of the first end cover 3 can be fixedly connected to the gas phase coating cylinder 2, and the inner side wall of the first end cover 3 can be rotationally connected to one end of the gas phase coating cylinder 2. The screw feeding valve 51 is used for conveying the negative electrode material into the gas phase coating cylinder 2. The screw feeding valve 51 is connected to the first end cover 3 at the feeding port 52, and the screw feeding valve 51 is sealingly connected to the feeding port 52.

[0033] The second end cover 4 can be rotationally connected to the gas phase coating cylinder 2. The discharging structure 6 includes a discharging port 62 penetratingly arranged on the second end cover 4 and a screw discharging valve 61 fixedly installed on the second end cover 4 at the discharging port 62.

[0034] Specifically, the outer side wall of the second end cover 4 can be fixedly connected to the gas phase coating cylinder 2, and the inner side wall of the second end cover 4 can be rotationally connected to the other end of the gas phase coating cylinder 2. The screw discharging valve 61 is used for outputting the negative electrode material in the gas phase coating cylinder 2 from the gas phase coating cylinder 2.

[0035] The air inlet structure 7 can include an air inlet 72 penetratingly arranged on the second end cover 4, and an air inlet pipe 71 fixedly arranged on the second end cover 4 at the air inlet 72.

[0036] The air outlet structure 8 can include an air outlet 82 penetratingly arranged on the first end cover 3, and an air outlet pipe 81 fixedly arranged on the first end cover 3 at the air outlet 82.

[0037] Specifically, the second end cover 4 and the first end cover 3 are respectively provided with the air inlet 72 and the air outlet 82 at the ends away from each other. The air outlet pipe 81 can be an elbow pipe, and the end of the air outlet pipe 81 away from the gas phase coating cylinder 2 can be arranged upward.

[0038] Specifically, in use, first, the negative electrode material is continuously fed into the gas phase coating cylinder 2 through the screw feeding valve 51, and the gas phase coating cylinder 2 starts to rotate under the driving of the driving assembly 9, at the same time, the helical blade 21 pushes the negative electrode material to move along the axis of the gas phase coating cylinder 2 inside the gas phase coating cylinder 2, forming a continuous conveying process. In this process, the carbon atom gas flow decomposed by heating enters the gas phase coating cylinder 2 through the air inlet structure 7, and the carbon atoms decomposed under the action of heating are in full contact with the negative electrode material under the rotation of the gas phase coating cylinder 2 and the pushing of the helical blade 21, completing the surface coating. The coated negative electrode material is continuously discharged through the screw discharging valve 61, and at the same time, the carbon atom gas flow not fully utilized flows out from the air outlet structure 8 for subsequent processing or recycling. Through the continuous processing mode, the efficiency of the gas phase coating of the negative electrode material is significantly improved, while the uniformity and quality of the coating are maintained, providing an efficient and reliable solution for the processing of battery negative electrode materials.

[0039] The first end cover 3 and the second end cover 4 can be connected with the end of the gas phase coating cylinder 2 through a sealing bearing.

[0040] Specifically, the first end cover 3 and the second end cover 4 are connected with the end of the gas phase coating cylinder 2 through a sealing bearing, which not only ensures the rotation freedom of the gas phase coating cylinder 2, but also prevents the leakage of carbon atom gas flow or other gases. The screw feeding valve 51 and the screw discharging valve 61 are both screw driven, ensuring the closure and safety of the coating process.

[0041] The center line of the air inlet 72 can coincide with the axis of the gas phase coating cylinder 2, and the discharging port 62 is arranged at the bottom of the second end cover 4.

[0042] Specifically, the center line of the gas inlet 72 can coincide with the axis of the gas phase coating cylinder 2, ensuring that the carbon atom gas stream directly enters the cylinder from one end of the gas phase coating cylinder 2 and collides with the negative electrode material, which is conducive to the full contact and coating of the carbon atom and the negative electrode material. The discharging port 62 is located at the bottom of the second end cover 4, which can ensure that the negative electrode material after coating is smoothly discharged under the action of gravity.

[0043] The gas outlet 82 can be arranged above the feeding port 52.

[0044] Specifically, the gas outlet 82 is located above the feeding port 52, which can ensure that the carbon atom gas stream that is not fully utilized mixes with the newly entered negative electrode material during the rising process, further improving the coating efficiency, and also avoiding the convection gas from hindering the feeding of the negative electrode material.

[0045] The above-described content can be implemented alone or in various combinations, and these variants are within the protection scope of the present application.

[0046] It should be noted that in the description of the present application, the terms "upper end", "lower end", "bottom end" indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is used, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device containing a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including one" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0047] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent substitutions for part of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for coating a negative electrode material, characterized by: The application relates to a negative electrode material coating device, which comprises a base frame (1), a gas-phase coating cylinder (2) rotatably arranged on the base frame (1) and provided with openings at two ends, a driving assembly (9) arranged on the base frame (1) and used for driving the gas-phase coating cylinder (2) to rotate, a conveying structure arranged in the gas-phase coating cylinder (2) and used for conveying negative electrode material, a first end cover (3) connected to one end of the gas-phase coating cylinder (2), a second end cover (4) connected to the other end of the gas-phase coating cylinder (2), a feeding structure (5) connected to the first end cover (3), a discharging structure (6) connected to the second end cover (4), an air inlet structure (7) connected to the second end cover (4), and an air outlet structure (8) connected to the first end cover (3).

2. The coating device of a negative electrode material according to claim 1, characterized by: The conveying structure is a spiral blade (21) arranged on the inner wall of the gas-phase coating cylinder (2).

3. The coating device of a negative electrode material according to claim 1 or 2, characterized by: The driving assembly (9) comprises a mounting seat (91) fixed on the base frame (1), two supporting rollers (92) symmetrically arranged about the axis of the gas-phase coating cylinder (2), and a driving motor (93) fixed on the mounting seat (91) and connected with one of the supporting rollers (92) at the output end, wherein the two supporting rollers (92) are rotatably connected to the mounting seat (91) and abut against the outer wall of the gas-phase coating cylinder (2).

4. The coating device of a negative electrode material according to claim 1 or 2, characterized by: The first end cover (3) is rotatably connected to the gas-phase coating cylinder (2), and the feeding structure (5) comprises a feeding port (52) penetratingly arranged on the first end cover (3) and a screw feeding valve (51) fixedly arranged on the first end cover (3) at the feeding port (52).

5. The coating apparatus of a negative electrode material according to claim 1 or 2, characterized by: The second end cover (4) is rotatably connected to the gas-phase coating cylinder (2), and the discharging structure (6) comprises a discharging port (62) penetratingly arranged on the second end cover (4) and a screw discharging valve (61) fixedly arranged on the second end cover (4) at the discharging port (62).

6. The coating apparatus of a negative electrode material according to claim 5, wherein: The air inlet structure (7) comprises an air inlet port (72) penetratingly arranged on the second end cover (4) and an air inlet pipe (71) fixedly arranged on the second end cover (4) at the air inlet port (72).

7. The coating apparatus of claim 4, wherein: The air outlet structure (8) comprises an air outlet port (82) penetratingly arranged on the first end cover (3) and an air outlet pipe (81) fixedly arranged on the first end cover (3) at the air outlet port (82).

8. The coating apparatus of a negative electrode material according to claim 1 or 2, characterized by: The first end cover (3) and the second end cover (4) are connected with the end portions of the gas-phase coating cylinder (2) through sealing bearings.

9. The coating apparatus of claim 6, wherein: The center line of the air inlet port (72) coincides with the axis of the gas-phase coating cylinder (2), and the discharging port (62) is arranged at the bottom of the second end cover (4).

10. The coating apparatus of claim 7, wherein: The air outlet port (82) is arranged above the feeding port (52).

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