A lithium-air battery electrode material uniform coating device

Abstract

The utility model discloses a kind of lithium-air battery electrode material uniform coating devices, specifically related to, including box, motor one is provided in the middle part of box left end, dry solidification component is provided in the front of box inner chamber, driving roller assembly is provided in the middle part of box inner chamber, motor two is provided in the left side of box front end, winding assembly is provided in the front of box, unwinding assembly is provided in the front of box, winding assembly lower end and unwinding assembly are not contacted, slurry supply assembly is provided in the rear of box, scraper assembly is threadedly connected with the rear of box inner chamber, for uniform coating slurry.The lithium-air battery electrode material uniform coating device of the utility model, by the multi-roller linkage of driving roller assembly, realize electrode base material stable synchronous transmission, effectively avoid base material transmission deviation skid, guarantee coating process continuity, improve coating operation stability.

Description

Technical Field

[0001] This utility model relates to the field of battery motor material uniform coating device, and in particular to a lithium-air battery electrode material uniform coating device. Background Technology

[0002] Lithium-air batteries use oxygen from the air as the positive electrode active material, which greatly reduces the mass of active material carried by the battery itself, making it possible to increase energy density several times over.

[0003] In the preparation process of lithium-air batteries, uniform coating of electrode materials can improve the charge-discharge efficiency, cycle stability and service life of the battery. If the electrode coating is uneven, it will lead to excessive local current density, accelerate the wear of electrode materials, and thus shorten the overall service life of the battery, limiting the promotion of lithium-air batteries in practical applications.

[0004] Chinese patent document CN206897731 U discloses an electrode material coating device for preparing capacitor anodes. The device includes a material tank and a mesh plate installed within the tank. A compression spring connects the mesh plate to the bottom of the tank, and a mesh fabric layer is fixedly installed on the mesh plate. A roller is also provided within the tank, positioned above the mesh fabric layer, with its outer surface abutting against the mesh fabric layer. A driving device is connected to one end of the roller. This patent document effectively frees the operator's hands, reduces labor intensity, and improves production efficiency.

[0005] The aforementioned patent documents still have the following defects in practice:

[0006] In actual use, the stencil is prone to friction and wear after long-term and frequent sliding, causing it to shake and jam during subsequent movements; the structure is relatively simple, and the drying and curing time after coating is long; the control over the coating thickness is weak during the coating process. Utility Model Content

[0007] The main objective of this invention is to provide a uniform coating device for lithium-air battery electrode materials, which can effectively solve the problems mentioned above.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A uniform coating device for lithium-air battery electrode materials includes a housing. A motor is located at the middle of the left end of the housing. A drying and curing assembly is located at the front of the inner cavity of the housing. An active roller assembly is located at the middle of the inner cavity of the housing. A motor is located on the left side of the front end of the housing. A winding assembly and an unwinding assembly are located at the front end of the housing. The lower end of the winding assembly is not in contact with the unwinding assembly. A slurry supply assembly is located at the rear of the housing. A scraper assembly is threadedly connected to the rear of the inner cavity of the housing for uniformly coating the slurry.

[0010] Preferably, the active roller assembly includes an active roller one, with pulley one at both ends of the active roller one, an active roller two at the upper front end of the active roller one, pulley two at both ends of the active roller two, a belt one wound around the outer side of the pulley one and the outer side of the pulley two on the same side, and belt two on the outer side of each of the two pulley two, and the two belt two are rotatably connected to each other.

[0011] Preferably, the slurry supply assembly includes a slurry tank, a material transfer pipe fixedly connected to the lower middle of the slurry tank, a coating structure threadedly connected to the lower end of the material transfer pipe, a collection box fixedly connected to the lower end of the coating structure for holding the slurry flowing down from above, a slurry tank cover provided at the upper end of the slurry tank, a stirring rod fixedly connected to the lower middle of the slurry tank cover, and a switch valve provided at the upper middle of the material transfer pipe.

[0012] Preferably, a groove is formed in the middle of the inner cavity of the coating structure.

[0013] Preferably, the scraper assembly includes a fixing frame, with several micrometers fitted on the upper end of the fixing frame for adjusting the thickness of the coating slurry. A scraper is provided in the inner cavity of the fixing frame, with the top end of the scraper fixedly connected to the bottom end of the several micrometers. Several springs are provided on the top end of the scraper.

[0014] Preferably, the drying and curing assembly includes a ventilation duct, a fan is provided on the left side of the ventilation duct, a support frame is fixedly connected to the bottom end of the ventilation duct, a number of ultraviolet lamps are fixedly connected to the top end of the inner cavity of the support frame, a number of ventilation plates are provided at the top end of the inner cavity of the support frame, and guide rails are provided on both the left and right sides of the middle of the inner cavity of the support frame, and a number of transmission rods are provided at the ends of the two guide rails that are close to each other.

[0015] Preferably, the winding assembly includes a roller, a gear is provided at the left end of the roller, and quick-connect plugs are provided at both the left and right ends of the roller.

[0016] Preferably, the unwinding assembly includes a second roller, a second gear is provided at the left end of the second roller, quick-connect plugs are provided at both the left and right ends of the second roller, a third gear is provided between the first gear and the second gear, the third gear meshes with the first gear and the second gear respectively, the right end of the second motor is rotatably connected to the third gear, a driven roller is provided at the rear end of the second roller, a pulley third is provided at both the left and right ends of the driven roller, a driven roller second is provided at the rear end of the driven roller, a pulley fourth is provided at both the left and right ends of the driven roller second, and a belt third is wound around the outer side of the pulley fourth and the outer side of the pulley third on the same side.

[0017] Preferably, the coating structure has no contact with the outer surface of the drive roller.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the implementation of this utility model, the multi-roller linkage of the active roller assembly achieves stable and synchronous transmission of the electrode substrate, effectively avoiding substrate transmission deviation and slippage, ensuring the continuity of the coating process, and improving the stability of the coating operation.

[0020] 2. In the implementation of this utility model, the coating structure groove design and collection box recycling function of the slurry supply component are used in conjunction with the micrometer adjustment of the scraper component and the elastic buffer of the spring to achieve uniform slurry coating, precise control of coating thickness, high material utilization rate and stable coating quality.

[0021] 3. In the implementation of this utility model, the drying and curing component uses a fan, ventilation duct and ultraviolet lamp to dry and cure the coated substrate. At the same time, the transmission rod ensures that the substrate is heated evenly, resulting in high drying and curing efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure of this utility model from another perspective;

[0024] Figure 3 This is a schematic diagram of the active roller assembly structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the scraper assembly and slurry supply assembly of this utility model.

[0026] Figure 5 This is a schematic diagram of the drying and curing component structure of this utility model;

[0027] Figure 6 This is a schematic diagram of the winding and unwinding components of this utility model.

[0028] In the diagram: 1. Chamber; 2. Motor 1; 3. Drying and curing assembly; 31. Fan; 32. Ventilation duct; 33. Guide rail; 34. Ventilation plate; 35. Support frame; 36. Ultraviolet lamp; 37. Transmission rod; 4. Drive roller assembly; 41. Drive roller 1; 42. Pulley 1; 43. Belt 1; 44. Pulley 2; 45. Belt 2; 46. Drive roller 2; 5. Motor 2; 6. Rewinding assembly; 61. Roller 1; 62. Gear 1; 63. Quick connector 1; 7. Unwinding. Components; 71. Roller II; 72. Gear II; 73. Gear III; 74. Quick Connector II; 75. Driven Roller I; 76. Pulley III; 77. Belt III; 78. Driven Roller II; 79. Pulley IV; 8. Scraper Assembly; 81. Scraper; 82. Fixing Frame; 83. Micrometer; 84. Spring; 9. Slurry Supply Assembly; 91. Slurry Tank; 92. Material Transfer Pipe; 93. Coating Structure; 94. Collection Box; 95. Switch Valve; 96. Stirring Rod; 97. Slurry Tank Cover. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0030] Example 1, as Figure 1 and Figure 2 As shown, a uniform coating device for lithium-air battery electrode materials includes a housing 1, a motor 2 located at the middle of the left end of the housing 1, a drying and curing assembly 3 located at the front of the inner cavity of the housing 1, an active roller assembly 4 located at the middle of the inner cavity of the housing 1, a motor 5 located on the left side of the front end of the housing 1, a winding assembly 6 located at the front end of the housing 1, an unwinding assembly 7 located at the front end of the housing 1, the lower end of the winding assembly 6 not in contact with the unwinding assembly 7, a slurry supply assembly 9 located at the rear end of the housing 1, and a scraper assembly 8 threadedly connected to the rear of the inner cavity of the housing 1 for uniformly coating the slurry.

[0031] Preparation:

[0032] Prepare several substrate rolls and receiving rolls;

[0033] First, ensure the device is placed securely and check that all components are functioning properly. Second, place the rolled electrode material to be coated onto the winding assembly 6, ensuring it can rotate and be conveyed under the drive of the winding assembly 6 and the drive roller assembly 4, and pull its end to the winding assembly 6 to complete the threading, preparing for subsequent work. Finally, the operator first adds electrode coating slurry to the slurry supply assembly 9, then closes the slurry tank cover 97, checks the position of the scraper assembly 8, and initially adjusts its distance from the coating surface according to the coating requirements.

[0034] In this embodiment, when the power is turned on, motor 2 and motor 5 are started. The output shaft of motor 5 drives the unwinding assembly 7 to rotate. The roll of electrode material to be coated, which is wrapped on the unwinding assembly 7, rotates with it and is conveyed into the inner cavity of the box 1. At the same time, the active roller assembly 4 rotates synchronously, which guides and transmits the conveyed substrate.

[0035] During the coating process, the unwinding assembly 7 releases the lithium-air battery electrode substrate, which is then conveyed by the active roller assembly 4 to the working area of ​​the doctor blade assembly 8 and the slurry supply assembly 9. The electrode slurry output by the slurry supply assembly 9 is precisely and evenly coated onto the substrate surface by the doctor blade assembly 8. After coating, the substrate enters the drying and curing assembly 3 to complete the drying and curing of the coating slurry. Finally, the coated and cured substrate is wound up by the winding assembly 6 driven by the motor 5. All the components work together to ensure continuous and uniform coating.

[0036] When it is necessary to replace the substrate roll, first disconnect the power supply to stop motor 2 and motor 5. After the equipment is completely stopped, replace the substrate roll and install it on the unwinding assembly 7 and install the new receiving roll on the winding assembly 6. After adjusting the installation position, the operator pulls out a section of substrate and passes it through the matching stations of each assembly in sequence. Then, power on the device again to resume the coating operation.

[0037] Specifically, in order to achieve stable transmission of the electrode substrate, such as Figure 6 As shown, in this embodiment, the unwinding assembly 7 includes a second roller 71, a second gear 72 is provided at the left end of the second roller 71, quick-connect plugs 74 are provided at both the left and right ends of the second roller 71, a third gear 73 is provided between the first gear 62 and the second gear 72, the third gear 73 meshes with the first gear 62 and the second gear 72 respectively, the right end of the second motor 5 is rotatably connected to the third gear 73, a driven roller 75 is provided at the rear end of the second roller 71, a pulley 76 is provided at both the left and right ends of the driven roller 75, a driven roller 78 is provided at the rear end of the driven roller 75, a pulley 79 is provided at both the left and right ends of the driven roller 78, and a belt 77 is wound together on the outer side of the pulley 79 and the outer side of the pulley 76 on the same side;

[0038] In this embodiment, motor 25 drives gear 3 73 to rotate. Through gear meshing, it drives gear 1 62 of the winding assembly and gear 2 72 of the unwinding assembly to rotate synchronously, so that winding roller 1 61 and unwinding roller 2 71 rotate together to achieve synchronous transmission of electrode substrate unwinding and winding. During unwinding, roller 2 71 releases the substrate, which is guided by driven roller 1 75 and driven roller 2 78. Belt pulley 3 76, belt pulley 4 79 and belt 3 77 work together to ensure transmission stability. Among them, quick connector 2 74 facilitates quick disassembly and assembly of roller 2 71 and supports roll changing operation.

[0039] Specifically, in order to achieve stable transport and continuous, efficient coating of the electrode substrate, such as Figure 3As shown, in this embodiment, the active roller assembly 4 includes an active roller 41, with pulleys 42 at both ends of the active roller 41, an active roller 46 at the upper front end of the active roller 41, pulleys 44 at both ends of the active roller 46, belts 43 wrapped around the outer sides of the pulleys 42 and 44 on the same side, and belts 45 rotatably connected to the outer sides of the two pulleys 44.

[0040] In this embodiment, during implementation, motor 2 drives the active roller 46 to rotate, and the pulleys 44 at both ends of the active roller 41 are driven to rotate synchronously via belt 43, thereby realizing the synchronous linkage between the active roller 41 and the active roller 46. The substrate is released from the unwinding assembly 7, and belt 45 further transmits power to the unwinding assembly 7, jointly pulling the substrate to be stably and uniformly transported in the inner cavity of the housing 1, and stably conveyed to the working area of ​​the coating area of ​​the scraper assembly 8 and the slurry supply assembly 9 of the active roller 41.

[0041] Specifically, in order to achieve stable control of the electrode material coating slurry thickness to adapt to different coating requirements, such as Figure 4 As shown, in this embodiment, the scraper assembly 8 includes a fixing frame 82, and a plurality of micrometers 83 are sleeved on the upper end of the fixing frame 82 for adjusting the thickness of the coating slurry. A scraper 81 is provided in the inner cavity of the fixing frame 82, and the top end of the scraper 81 is fixedly connected to the bottom end of the plurality of micrometers 83. A plurality of springs 84 are provided on the top end of the scraper 81.

[0042] In this embodiment, based on the requirements of the electrode material coating for the slurry thickness, the micrometer 83 is operated to accurately set the distance between the scraper 81 and the coating surface, and adjust the coating slurry thickness. During the coating process, the coating surface carrying the slurry output by the slurry supply component 9 rotates to the working area of ​​the scraper 81. The scraper 81 scrapes the slurry and removes the excess slurry, so that the slurry is evenly coated on the surface of the electrode substrate. At the same time, the spring 84 provides elastic buffer for the scraper 81 to ensure stable coating pressure.

[0043] Specifically, in order to achieve the purpose of drying and curing the electrode material after coating with slurry, such as Figure 5 As shown, in this embodiment, the drying and curing component 3 includes a ventilation duct 32, a fan 31 is provided on the left side of the ventilation duct 32, a support frame 35 is fixedly connected to the bottom end of the ventilation duct 32, a number of ultraviolet lamps 36 are fixedly connected to the top end of the inner cavity of the support frame 35, a number of ventilation plates 34 are provided at the top end of the inner cavity of the support frame 35, and guide rails 33 are provided on both the left and right sides of the middle of the inner cavity of the support frame 35, and a number of transmission rods 37 are provided at the ends of the two guide rails 33 that are close to each other.

[0044] In this embodiment, during implementation, the coated surface is transferred to the inner cavity of the support frame 35 of the drying and curing assembly 3 via the active roller assembly 4 and placed on the transmission rod 37. The transmission rod 37 transfers the substrate via the guide rail 33.

[0045] When the fan 31 is started, the external airflow is evenly blown onto the surface of the substrate through the ventilation duct 32 and several ventilation plates 34. At the same time, the ultraviolet lamp 36 is turned on. The coating slurry is dried and cured by the synergistic effect of hot air and ultraviolet light. During this process, the transmission rod 37 continues to operate along with the coating surface to ensure that it is heated and irradiated evenly.

[0046] Specifically, in order to achieve stable winding and rapid component connection, such as Figure 6 As shown, in this embodiment, the winding assembly 6 includes a roller 61, a gear 62 is provided at the left end of the roller 61, and quick-connect plugs 63 are provided at both the left and right ends of the roller 61.

[0047] In this embodiment, during the implementation process, motor 25 operates, and due to the meshing transmission of gear 1 62 and gear 3 73, roller 1 61 is driven to rotate, and the coated electrode material is wound up; the quick-connect plugs 1 63 on both sides of roller 1 61 can enable roller 1 61 to be quickly assembled and disassembled.

[0048] Example 2: Based on Example 1, this example can optimize the uniformity of slurry supply and improve coating quality;

[0049] Specifically, in order to achieve the above objectives, such as Figure 3 and Figure 4 As shown, in this embodiment, the slurry supply component 9 includes a slurry tank 91, a material transfer pipe 92 is fixedly connected to the lower middle of the slurry tank 91, a coating structure 93 is threadedly connected to the lower end of the material transfer pipe 92, a collection box 94 is fixedly connected to the lower end of the coating structure 93 for holding the slurry flowing down from above, a slurry tank cover 97 is provided at the upper end of the slurry tank 91, a stirring rod 96 is fixedly connected to the lower middle of the slurry tank cover 97, and a switch valve 95 is provided at the upper middle of the material transfer pipe 92.

[0050] Furthermore, a groove is provided in the middle of the inner cavity of the coating structure 93;

[0051] Furthermore, the coating structure 93 has no contact with the outer surface of the drive roller 41;

[0052] In this embodiment, electrode coating slurry is first added into the slurry tank 91, the slurry tank cover 97 is closed, and the stirring rod 96 can stir the slurry to prevent sedimentation by rotating the slurry tank cover 97. The switch valve 95 is opened, and the slurry flows into the coating structure 93 through the material transfer pipe 92. It is buffered in the groove of the inner cavity of the coating structure 93, and then the slurry is uniformly guided to the substrate to be coated.

[0053] During the coating process, any unattached slurry flows into the collection box 94 for recycling, thus preventing contamination of the equipment. When it is necessary to clean or replace the coating structure 93, the old coating structure can be unscrewed and replaced with a new one using the threaded connection of the material transfer pipe 92, ensuring slurry supply and coating effect.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for uniformly coating electrode materials for lithium-air batteries, comprising a housing (1), characterized in that: A motor (2) is provided at the middle of the left end of the box (1). A drying and curing assembly (3) is provided at the front of the inner cavity of the box (1). An active roller assembly (4) is provided at the middle of the inner cavity of the box (1). A motor (5) is provided on the left side of the front end of the box (1). A winding assembly (6) is provided at the front end of the box (1). An unwinding assembly (7) is provided at the front end of the box (1). The lower end of the winding assembly (6) does not contact the unwinding assembly (7). A slurry supply assembly (9) is provided at the rear of the box (1). A scraper assembly (8) is threadedly connected to the rear of the inner cavity of the box (1) for uniformly coating the slurry.

2. The lithium-air battery electrode material uniform coating device according to claim 1, characterized in that: The active roller assembly (4) includes an active roller one (41), with pulley one (42) provided at both ends of the active roller one (41), an active roller two (46) provided at the upper front end of the active roller one (41), and pulley two (44) provided at both ends of the active roller two (46). A belt one (43) is wound around the outer side of the pulley one (42) and the outer side of the pulley two (44) on the same side. A belt two (45) is provided on the outer side of each of the two pulley two (44), and the two belt two (45) are rotatably connected to each other.

3. The lithium-air battery electrode material uniform coating device according to claim 1, characterized in that: The slurry supply assembly (9) includes a slurry tank (91), a material transfer pipe (92) is fixedly connected to the middle of the lower end of the slurry tank (91), a coating structure (93) is threadedly connected to the lower end of the material transfer pipe (92), a collection box (94) is fixedly connected to the lower end of the coating structure (93) for holding the slurry flowing down from above, a slurry tank cover (97) is provided at the upper end of the slurry tank (91), a stirring rod (96) is fixedly connected to the middle of the lower end of the slurry tank cover (97), and a switch valve (95) is provided at the middle of the upper side of the material transfer pipe (92).

4. The lithium-air battery electrode material uniform coating device according to claim 3, characterized in that: The coating structure (93) has a groove in the middle of its inner cavity.

5. The lithium-air battery electrode material uniform coating device according to claim 1, characterized in that: The scraper assembly (8) includes a fixing frame (82), and a number of micrometers (83) are sleeved on the upper end of the fixing frame (82) for adjusting the thickness of the coating slurry. A scraper (81) is provided in the inner cavity of the fixing frame (82). The top end of the scraper (81) is fixedly connected to the bottom end of the number of micrometers (83). A number of springs (84) are provided on the top end of the scraper (81).

6. The lithium-air battery electrode material uniform coating device according to claim 1, characterized in that: The drying and curing assembly (3) includes a ventilation duct (32), a fan (31) is provided on the left side of the ventilation duct (32), a support frame (35) is fixedly connected to the bottom end of the ventilation duct (32), a number of ultraviolet lamps (36) are fixedly connected to the top end of the inner cavity of the support frame (35), a number of ventilation plates (34) are provided at the top end of the inner cavity of the support frame (35), and guide rails (33) are provided on both the left and right sides of the middle of the inner cavity of the support frame (35). A number of transmission rods (37) are provided at the ends of the two guide rails (33) that are close to each other.

7. The lithium-air battery electrode material uniform coating device according to claim 1, characterized in that: The winding assembly (6) includes a roller (61), a gear (62) is provided at the left end of the roller (61), and quick-connect plugs (63) are provided at both the left and right ends of the roller (61).

8. The lithium-air battery electrode material uniform coating device according to claim 7, characterized in that: The unwinding assembly (7) includes a second roller (71), a second gear (72) is provided at the left end of the second roller (71), quick-connect plugs (74) are provided at both the left and right ends of the second roller (71), a third gear (73) is provided between the first gear (62) and the second gear (72), the third gear (73) meshes with the first gear (62) and the second gear (72) respectively, the right end of the second motor (5) is rotatably connected to the third gear (73), a driven roller (75) is provided at the rear end of the second roller (71), a pulley (76) is provided at both the left and right ends of the driven roller (75), a driven roller (78) is provided at the rear end of the driven roller (75), a pulley (79) is provided at both the left and right ends of the driven roller (78), and a belt (77) is wound together on the outer side of the pulley (79) and the outer side of the pulley (76) on the same side.

9. The lithium-air battery electrode material uniform coating device according to claim 3, characterized in that: The coating structure (93) has no contact with the outer surface of the active roller (41).

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