Lithium battery coating device

Abstract

The utility model discloses a lithium battery coating device and belongs to the technical field of lithium battery manufacturing. The lithium battery coating device comprises a material storage main body, a material conveying assembly, a coating assembly and a motor, the material storage main body is provided with a material storage cavity, and a material guide slope inclining downwards is arranged in the material storage cavity; the liquid inlet end of the material conveying assembly communicates with the material storage cavity, and the multiple coating assemblies are oppositely arranged on the two sides of the material storage body correspondingly; the coating assembly comprises a supporting plate, the supporting plate is vertically arranged on one side of the material storage main body, a liquid guide plate is arranged at the top of the supporting plate, and the liquid guide plate communicates with the liquid outlet end of the material conveying assembly; the bottom end part of the liquid guide plate is connected with a coating roller which is vertically arranged; the coating roller is positioned above the material storage cavity; and the output end of the motor is connected with the coating roller. The slurry recycling and coating difficulty can be reduced, and the slurry recycling efficiency and the coating efficiency are improved; the problem that the existing slurry recycling and coating efficiency is low is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing, in particular to a lithium battery coating device. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] Pole coating is one of the links in the lithium battery manufacturing process. This link involves evenly coating a slurry containing active materials, conductive agents, binders and other additives on a metal foil (current collector). The metal foil is usually aluminum (for the positive electrode) or copper (for the negative electrode), and its quality directly affects the performance and quality of the lithium battery.

[0004] In the coating process, the coater plays a vital role, but the coater usually includes a slurry supply system, a coating system and a drying system, focusing on the improvement of the coating method and ignoring the recovery of excess slurry after coating.

[0005] A Chinese patent with patent publication number CN211756447U discloses a lithium battery pole piece coating device. Although the device installs a material trough for storing slurry on one side of the coating roller, it is unable to effectively collect the excess slurry after coating.

[0006] The device also performs coating in a horizontal direction, and uses a scraper to trim the thickness of the slurry on the coating roller so that the slurry on the upper surface of the coating roller is evenly coated, thereby controlling the coating thickness; but this makes the coating of the pole piece more difficult and reduces the coating efficiency. Utility Model Content

[0007] In view of the shortcomings of the prior art, the purpose of the embodiment of the utility model is to provide a lithium battery coating device, which directly coats the slurry on the electrode material through a vertically arranged coating assembly without the need for an additional scraping step, and the slurry flows directly into the storage chamber under the action of gravity, thereby improving the efficiency of coating and slurry recovery.

[0008] A lithium battery coating device, comprising:

[0009] A material storage body, wherein the material storage body is provided with a material storage cavity, and a downwardly inclined material guiding slope is arranged in the material storage cavity;

[0010] A material delivery component, wherein a liquid inlet end of the material delivery component is in communication with the material storage cavity;

[0011] A coating assembly, wherein the number of the coating assemblies is multiple, and the multiple coating assemblies are respectively arranged on both sides of the material storage body; the coating assembly comprises a support plate, which is vertically arranged on one side of the material storage body, and a liquid guide plate is arranged on the top of the support plate, and the liquid guide plate is connected to the liquid outlet end of the material delivery assembly; the bottom end of the liquid guide plate is connected to a vertically arranged coating roller, and the coating roller is located above the material storage cavity;

[0012] A motor, wherein the output end of the motor is connected to the coating roller.

[0013] By adopting the above technical solution, when in use, the electrode material is placed between two relatively arranged mounting frames, and the electrode material is driven to move between the two mounting frames by the coating roller. When the electrode material moves, the feeding assembly and the liquid guide plate cooperate to transport the slurry in the storage chamber to the coating roller, and the slurry is directly coated on the electrode material through the coating roller. Then, the slurry flows into the storage chamber under the action of gravity, thereby realizing the recovery of the slurry. There is no need for additional scraping and additional slurry recovery, which improves the coating efficiency of the electrode material and the recovery efficiency of the slurry.

[0014] In some embodiments, the material delivery assembly includes a pump body, the liquid inlet end of the pump body is connected to a liquid inlet pipe, and the liquid outlet end of the pump body is connected to a liquid outlet hose;

[0015] One end of the liquid inlet pipe is connected to the material storage cavity, one end of the liquid outlet hose is connected to the infusion plate, and one end of the infusion plate is provided with a plurality of liquid outlet heads.

[0016] By adopting the above technical solution, under the driving action of the pump body, the slurry is transferred from the storage chamber to the infusion plate, and flows out to the coating roller through multiple liquid outlet heads, so that the slurry can flow out evenly and fully cover the coating roller.

[0017] In some embodiments, the infusion plate is placed on the liquid guide plate.

[0018] By adopting the above technical solution, the infusion plate is placed on the horizontal part of the liquid guide plate. After the slurry is output through the liquid outlet head of the infusion plate, it flows to the coating roller through the inclined part of the liquid guide plate, thereby increasing the speed of the slurry flowing to the coating roller.

[0019] In some embodiments, top plates are symmetrically arranged on both sides of the liquid guiding plate, the top plates are vertically arranged, and the top plates and the liquid guiding plate form a conveying channel.

[0020] By adopting the above technical solution, a conveying channel for slurry conveying is formed by utilizing the top plate and the liquid guide plate, thereby limiting the conveying range of the slurry.

[0021] In some embodiments, the liquid guide plate includes a first plate body and a second plate body, the first plate body is horizontally arranged on the top of the support plate, one end of the second plate body is connected to the second plate body, and the other end of the second plate body is connected to the coating roller;

[0022] Wherein, an angle is formed between the first plate body and the second plate body.

[0023] By adopting the above technical solution, the conveying speed of the slurry is increased.

[0024] In some embodiments, a guide groove is provided at the top of the support plate along the width direction of the support plate, and a connecting plate is horizontally provided at the bottom of the liquid guide plate;

[0025] The connecting plate is slidably connected to the guide groove.

[0026] By adopting the above technical solution, the spacing between the liquid guide plate and the support plate can be adjusted, and then the spacing between the two coating rollers can be adjusted, which is convenient for application to electrode materials of different specifications.

[0027] In some embodiments, a screw is provided on one side of the support plate along the length direction, and one end of the screw is in contact with the connecting plate.

[0028] By adopting the above technical solution, after the position of the liquid guide plate is adjusted, the connecting plate is fixed by screws, so that the position of the liquid guide plate is fixed, thereby ensuring the stability of the overall structure.

[0029] In some embodiments, a mounting frame is vertically disposed at the bottom end of the liquid guide plate, and the coating roller is vertically disposed on the mounting frame;

[0030] A shell is arranged at the bottom of the mounting frame, and the motor is arranged inside the shell.

[0031] By adopting the above technical solution, the installation stability of the coating roller is ensured by using the mounting frame, and the motor is protected by using the housing.

[0032] In some embodiments, a plurality of groups of feet are disposed at the bottom of the material storage body, and the plurality of groups of feet are evenly distributed along the length direction of the material storage body.

[0033] By adopting the above technical solution, wear on the bottom surface of the material storage body can be avoided.

[0034] In some embodiments, the material storage chamber is connected to a discharge pipe, and a valve is provided on the discharge pipe.

[0035] By adopting the above technical solution, after coating is completed, the remaining slurry in the storage bin can be discharged through the discharge pipe.

[0036] One or more technical solutions provided in the embodiments of the present utility model have at least the following technical effects or advantages:

[0037] 1. The technical solution provided by the utility model drives the electrode material to move through the coating component. The electrode material is vertically arranged, and the slurry is transmitted to the coating roller through the feeding component during movement. The slurry is coated on the electrode material through the coating roller, and the excess slurry flows downward to the inside of the storage cavity under the action of gravity. No additional scraping step is required, which reduces the difficulty of coating the electrode material, improves the coating efficiency of the electrode material, and facilitates the recovery of the slurry. No additional steps are required to recover the slurry, which reduces the difficulty of slurry recovery and improves the slurry recovery efficiency.

[0038] 2. The technical solution provided by the utility model is that the spacing between the relatively arranged coating rollers is adjustable, which is convenient for application to lithium batteries or electrode materials of different specifications and can improve the application range of the lithium battery coating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0040] Figure 1 It is a schematic diagram of the overall structure of the lithium battery coating device provided by the embodiment of the utility model;

[0041] Figure 2 It is a schematic diagram of the three-dimensional structure of the lithium battery coating device provided by the embodiment of the utility model;

[0042] Figure 3 It is a three-dimensional schematic diagram of another angle of the lithium battery coating device provided by the embodiment of the utility model;

[0043] Figure 4 It is a structural schematic diagram of a material storage body provided by an embodiment of the utility model;

[0044] Figure 5 It is a schematic diagram of the connection between the coating component and the feeding component provided in the embodiment of the utility model;

[0045] Figure 6 It is a structural schematic diagram of a coating assembly provided by an embodiment of the utility model;

[0046] Figure 7 This is a schematic structural diagram of a coating assembly provided by an embodiment of the utility model from another angle;

[0047] Figure 8 It is a structural schematic diagram of a housing provided by an embodiment of the utility model;

[0048] Fig. 9 It is a structural schematic diagram of a material feeding assembly provided in an embodiment of the utility model;

[0049] In the figure: 1. material storage component; 11. valve; 12. material storage body; 13. bottom foot; 14. discharge pipe; 15. material guide slope; 16. material storage chamber; 2. material delivery component; 21. liquid outlet head; 22. liquid delivery plate; 23. liquid outlet hose; 24. pump body; 25. liquid inlet pipe; 3. coating component; 31. shell; 32. coating roller; 33. top plate; 34. liquid guide plate; 35. support plate; 36. mounting frame; 37. screw; 38. connecting plate; 39. guide groove; 310. motor.

[0050] In order to show the positions of various parts, the distances or sizes between them are exaggerated and the schematic diagram is for reference only. DETAILED DESCRIPTION

[0051] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0052] As introduced in the background technology, the existing coating equipment mostly coats the electrode material horizontally. After the coating slurry is completed, an additional scraping step is required, which increases the difficulty of coating; and the recovery of the slurry is ignored. In order to solve the above technical problems, the utility model proposes a lithium battery coating device.

[0053] Combination Figure 1-Figure 9 The lithium battery coating device comprises a storage component 1, a feeding component 2 and a coating component 3. The storage component 1 comprises a storage body 12. The storage body 12 is open at the top and is recessed inward to a certain depth to form a storage cavity 16. The bottom of the storage cavity 16 is inclined from the middle position to both sides and downward to form a material guide slope 15. The storage cavity 16 is connected to a discharge pipe 14. A valve 11 is installed on the discharge pipe 14. When the coating is completed, the slurry in the storage cavity 16 can be discharged through the discharge pipe 14. Two coating components 3 are respectively installed on both sides of the storage body 12. The two coating components 3 are symmetrically arranged, and the storage cavity 16 is located between the two coating components 3. The liquid inlet end of the feeding component 2 is connected to the storage cavity 16, and the liquid outlet end of the feeding component 2 is connected to the coating component 3, so that the slurry in the storage cavity 16 is transferred to the coating component 3 through the feeding component for coating the electrode material.

[0054] The coating assembly 3 includes a support plate 35, which is vertically installed on one side of the material storage body 12. A liquid guide plate 34 is horizontally installed on the top end of the support plate 35. Top plates 33 are vertically installed on both sides of the liquid guide plate 34 along the length direction, and a slurry conveying channel is formed between the top plate 33 and the liquid guide plate 34.

[0055] The liquid guide plate 34 includes a first plate body and a second plate body, one end of the second plate body is connected to the first plate body, the two are an integral structure, and an obtuse angle is formed between the first plate body and the second plate body, and a mounting frame 36 is vertically arranged at the other end of the second plate body, the mounting frame 36 is a half-mouth shape, and three coating rollers 32 are vertically installed inside the mounting frame 36; a housing 31 is installed at the bottom of the mounting frame 36, and a motor 310 corresponding to the coating roller 32 is fixed in the housing 31, and the output end of the motor 310 extends out of the housing 31 and the mounting frame 36 and is coaxially connected to the coating roller 32, which is used to drive the coating roller 32 to rotate. The coating roller 32 is located above the storage chamber 16, so that the slurry flows to the storage chamber 16 under the action of gravity.

[0056] In order to facilitate the adjustment of the spacing between the relatively arranged coating rollers 32, a connecting plate 38 is fixedly installed at the bottom of the first plate body, and a guide groove 39 matching the connecting plate 38 is provided at the top of the support plate 35. The connecting plate 38 is slidably connected to the guide groove 39 to adjust the spacing between the coating rollers 32. A screw rod 37 is threadedly connected to one side of the support plate 35 along the length direction. After the adjustment is completed, the screw rod 37 is tightened so that one end of the screw rod 37 abuts against the connecting plate 38 to fix the first plate body and keep the overall structure stable. The horizontal height of the top of the mounting frame 36 is lower than the lowest horizontal height of the connecting plate 38.

[0057] In order to make the slurry flow evenly to the coating roller 32, further, the feeding assembly 2 includes a pump body 24, the liquid inlet end of the pump body 24 is connected to a liquid inlet pipe 25, the liquid outlet end of the pump body 24 is connected to a liquid outlet hose 23, one end of the liquid inlet pipe 25 extends to the interior of the storage chamber 16 to achieve communication with the storage chamber 16; the liquid outlet hose 23 is connected to a liquid guide plate 34, the liquid guide plate 34 is placed on the first plate body, the interior of the liquid guide plate 34 is hollow, and the liquid outlet side thereof is connected to a plurality of liquid outlet heads 21, which are used to quickly flow the slurry to the coating roller 32 through the second plate body.

[0058] In order to prevent the bottom surface of the material storage body 12 from being quickly worn during use, four feet 13 are installed at the bottom of the material storage body 12, and the four feet 13 are respectively installed at the four corners of the material storage body 12.

[0059] The working method of this embodiment is as follows:

[0060] When the electrode material needs to be coated, the electrode material to be coated is placed vertically between the two mounting frames 36, and the motor 310 is used to drive the coating roller 32 to rotate inside the mounting frame 36, so that the coating roller 32 drives the electrode material to move between the two mounting frames 36. When the electrode material moves, the pump body 24 draws the slurry inside the storage chamber 16 through the liquid inlet pipe 25, and discharges the slurry through the discharge hose. The slurry is transported to the liquid guide plate 34 through the infusion plate 22 and the liquid outlet head 21, and the slurry is transported to the coating roller 32 through the liquid guide plate 34. The slurry is vertically coated on the electrode material through the coating roller 32. After the slurry is coated on the electrode material, the excess slurry automatically flows back to the storage chamber 16 under gravity conditions, without the need for additional scraping with a scraper. At the same time, the slurry is automatically recovered by the pump body 24 for subsequent use.

[0061] After coating is completed, the valve 11 on the discharge pipe 14 is opened to discharge the slurry in the storage chamber 16 through the discharge pipe 14 .

[0062] Although the above describes the specific implementation methods of the utility model in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A lithium battery coating device, characterized in that: include: A material storage body, wherein the material storage body is provided with a material storage cavity, and a downwardly inclined material guiding slope is arranged in the material storage cavity; A material delivery component, wherein a liquid inlet end of the material delivery component is in communication with the material storage cavity; A coating assembly, wherein the number of the coating assemblies is multiple, and the multiple coating assemblies are respectively arranged on both sides of the material storage body; the coating assembly comprises a support plate, which is vertically arranged on one side of the material storage body, and a liquid guide plate is arranged on the top of the support plate, and the liquid guide plate is connected to the liquid outlet end of the material delivery assembly; the bottom end of the liquid guide plate is connected to a vertically arranged coating roller, and the coating roller is located above the material storage cavity; A motor, wherein the output end of the motor is connected to the coating roller.

2. The lithium battery coating device according to claim 1, characterized in that: The material delivery assembly comprises a pump body, the liquid inlet end of the pump body is connected to a liquid inlet pipe, and the liquid outlet end of the pump body is connected to a liquid outlet hose; One end of the liquid inlet pipe is connected to the material storage cavity, one end of the liquid outlet hose is connected to the infusion plate, and one end of the infusion plate is provided with a plurality of liquid outlet heads.

3. The lithium battery coating device according to claim 2, characterized in that: The infusion plate is placed on the liquid guide plate.

4. The lithium battery coating device according to claim 1, characterized in that: Top plates are symmetrically arranged on both sides of the liquid guide plate. The top plates are arranged vertically, and the top plates and the liquid guide plate form a conveying channel.

5. The lithium battery coating device according to claim 1, characterized in that: The liquid guide plate comprises a first plate body and a second plate body, the first plate body is horizontally arranged on the top of the support plate, one end of the second plate body is connected to the second plate body, and the other end of the second plate body is connected to the coating roller; Wherein, an angle is formed between the first plate body and the second plate body.

6. The lithium battery coating device according to claim 1, characterized in that: A guide groove is provided at the top of the support plate along the width direction of the support plate, and a connecting plate is horizontally provided at the bottom of the liquid guide plate; The connecting plate is slidably connected to the guide groove.

7. The lithium battery coating device according to claim 6, characterized in that: A screw rod is provided on one side of the support plate along the length direction, and one end of the screw rod abuts against the connecting plate.

8. The lithium battery coating device according to claim 1, characterized in that: A mounting frame is vertically arranged at the bottom end of the liquid guide plate, and the coating roller is vertically arranged on the mounting frame; A shell is arranged at the bottom of the mounting frame, and the motor is arranged inside the shell.

9. The lithium battery coating device according to claim 1, characterized in that: A plurality of groups of feet are arranged at the bottom of the material storage body, and the plurality of groups of feet are evenly distributed along the length direction of the material storage body.

10. The lithium battery coating device according to claim 1, characterized in that: The material storage cavity is connected with a discharge pipe, and a valve is arranged on the discharge pipe.

Images