Pole piece coating device

Abstract

The utility model relates to the technical field of pole piece coating equipment, and provides a pole piece coating device which comprises a first coating mechanism and a second coating mechanism, the first coating mechanism comprises a first rotating shaft and a coating disc; the coating disc is arranged outside the first rotating shaft in a sleeving mode, and the surface of the coating disc is provided with a first coating surface used for making contact with the foil; a plurality of coating concave cavities are distributed on the first coating surface; the second coating mechanism is arranged at the upstream or downstream of the first coating mechanism along the foil conveying direction; the second coating mechanism comprises a second rotating shaft and a reticulate pattern coating roller; the second rotating shaft is arranged in the reticulate pattern coating roller in a penetrating manner, and the surface of the reticulate pattern coating roller is provided with a second coating surface used for being in contact with the foil; and a plurality of reticulated holes are distributed on the surface of the second coating surface.

Description

Technical Field

[0001] This utility model belongs to the technical field of electrode coating equipment, and more specifically, it relates to an electrode coating device. Background Technology

[0002] With the rapid development of new energy vehicles, batteries are one of the most important components. During battery production, it has become an industry consensus to coat both sides of the positive electrode coating area with insulating material. The conventional method involves simultaneously applying the slurry and insulating material through a die pad. This simultaneous spraying of the slurry and insulating material creates an impact, resulting in noticeable frayed edges, which severely affects battery quality. Utility Model Content

[0003] The purpose of this invention is to provide an electrode coating device to solve the technical problem that the electrode production process in the prior art is prone to producing false edges.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide an electrode coating apparatus for coating the surface of foil materials, comprising:

[0005] A first coating mechanism, comprising: a first rotating shaft and a coating disk; the coating disk is sleeved outside the first rotating shaft, and the surface of the coating disk has a first coating surface for contacting the foil; a plurality of coating cavities are arranged on the first coating surface;

[0006] The second coating mechanism is located upstream or downstream of the first coating mechanism along the foil conveying direction; the second coating mechanism includes a second rotating shaft and an anilox coating roller; the second rotating shaft passes through the anilox coating roller, and the surface of the anilox coating roller has a second coating surface for contacting the foil; a plurality of anilox holes are arranged on the surface of the second coating surface.

[0007] Furthermore, the coating disks are provided in multiple portions at intervals along the axial direction of the first rotation axis.

[0008] Furthermore, all of the aforementioned coating disks are ceramic coating disks.

[0009] Furthermore, each of the coating discs is detachably connected to the first rotating shaft.

[0010] Furthermore, for any of the coating disks: the coating disk has a first blank area and a second blank area, and the first coating surface is between the first blank area and the second blank area; the first blank area and the second blank area extend along the circumferential direction of the edge of the coating disk.

[0011] Furthermore, grooves are provided in both the first and second blank areas.

[0012] Furthermore, the opening shape of each of the coating cavities is honeycomb-shaped.

[0013] Furthermore, the plurality of mesh holes respectively form multiple mesh hole groups, and the mesh holes in each mesh hole group are evenly distributed.

[0014] Furthermore, the distance between adjacent mesh groups is greater than the distance between adjacent mesh holes within each mesh group.

[0015] Furthermore, along the foil conveying direction, the second coating mechanism is located upstream of the first coating mechanism; the electrode coating apparatus also includes a third coating mechanism, located downstream of the first coating mechanism along the foil conveying direction.

[0016] The advantages of the electrode coating apparatus provided by this utility model are as follows: Compared with the prior art, the electrode coating apparatus provided by this utility model allows insulating slurry to be placed in the coating cavity; when the first coating surface of the coating disc contacts the foil, the insulating slurry in the coating cavity can be coated onto the foil; the insulating slurry is coated independently and will not be mixed with other conductive materials during the coating process to produce a false edge; when the anilox coating roller rotates, the second coating surface of the anilox coating roller contacts the foil and coats the foil surface with conductive slurry, and the conductive slurry in the anilox holes can be coated onto the foil to form a first conductive layer; since the coating of the first conductive layer and the insulating slurry are coated independently, the first conductive layer and the insulating slurry will not be mixed together during the coating process to produce a false edge. Attached Figure Description

[0017] Figure 1 A three-dimensional schematic diagram of the electrode coating device provided in the embodiment of this utility model;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 An exploded view of the electrode coating apparatus provided in this embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the coating cavity on the coating disc provided in an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of the electrode coating device provided in this embodiment of the utility model.

[0022] The following are the labeling elements in the figure:

[0023] 1-Frame; 11-Conveying channel; 2-Second coating mechanism; 21-Anilox coating roller; 211-Second coating surface; 212-Anilox hole group; 2121-Anilox hole; 22-Second feeder; 23-Second rotating shaft; 3-First coating mechanism; 31-Coating disc; 311-First coating surface; 312-Coating cavity; 3131-First blank area; 3132-Second blank area; 32-First feeder; 33-First rotating shaft; 4-Third coating mechanism; 51-Second conductive layer; 521-Second insulating layer; 522-First insulating layer; 53-First conductive layer; 6-Foil; 71-Second roller shaft; 72-First roller shaft; 73-Third roller shaft. Detailed Implementation

[0024] It should be noted that the specific embodiments are only used to explain the present invention and are not intended to limit the present invention.

[0025] It should be noted that, in the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Here, A and B can be singular or plural, respectively.

[0026] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" or "attached to" another component, it can be directly connected to or indirectly connected to that other component. When a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component.

[0027] It should be noted that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] It should be noted that the terms "second" and "first" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "second" or "first" may explicitly or implicitly include one or more of that feature.

[0029] It should be noted that the term "multiple" means two or more, unless otherwise explicitly specified.

[0030] Please refer to the following: Figures 1 to 5 The electrode coating apparatus provided by this utility model will now be described. The electrode coating apparatus is used to coat the surface of a foil 6. The electrode coating apparatus includes: a first coating mechanism 3 and a second coating mechanism 2; the first coating mechanism 3 includes: a first rotating shaft 33 and a coating disk 31; the coating disk 31 is sleeved outside the first rotating shaft 33, and the surface of the coating disk 31 has a first coating surface 311 for contacting the foil 6; a plurality of coating cavities 312 are arranged on the first coating surface 311; the second coating mechanism 2 is arranged upstream or downstream of the first coating mechanism 3 along the conveying direction of the foil 6; the second coating mechanism 2 includes a second rotating shaft 23 and a textured coating roller 21; the second rotating shaft 23 passes through the textured coating roller 21, and the surface of the textured coating roller 21 has a second coating surface 211 for contacting the foil 6; a plurality of textured holes 2121 are arranged on the surface of the second coating surface 211.

[0031] Thus, insulating slurry can be placed in the coating cavity 312; when the first coating surface 311 of the coating disk 31 contacts the foil 6, the insulating slurry in the coating cavity 312 can be coated on the foil 6; the insulating slurry is coated independently, and will not be mixed with other conductive materials during the coating process to produce a false edge; when the anilox coating roller 21 rotates, the second coating surface 211 of the anilox coating roller 21 contacts the foil 6 and coats the surface of the foil 6 with conductive slurry, and the conductive slurry in the anilox holes 2121 can be coated on the foil 6 to form the first conductive layer 51; since the coating of the first conductive layer 51 and the insulating slurry are coated independently, the first conductive layer 51 and the insulating slurry will not be mixed with each other during the coating process to produce a false edge.

[0032] In one embodiment, a conveying channel 11 is provided on the frame 1. In one embodiment, the foil 6 can be conveyed along the conveying channel 11.

[0033] In one embodiment, the conveying channel 11 can be any of a space, pipe, or trough.

[0034] In one embodiment, the power for the foil 6 to move along the conveying channel 11 can come from the user or a motor.

[0035] In one embodiment, after the first coating mechanism 3 coats the insulating paste on the foil 6, it can form a second insulating layer 522 and a first insulating layer 521 respectively, with a first conductive layer 51 located between the second insulating layer 522 and the first insulating layer 521. Since the second insulating layer 522 and the first insulating layer 521 are located on both sides of the first conductive layer 51 respectively, the second insulating layer 522 and the first insulating layer 521 can respectively provide insulation from both sides of the first conductive layer 51. The first conductive layer 51 is formed first, and then the second insulating layer 522 and the first insulating layer 521 are formed respectively. The second insulating layer 522 and the first conductive layer 51 are not easily mixed sufficiently to affect the insulation effect, and the first insulating layer 521 and the first conductive layer 51 are not easily mixed sufficiently to affect the insulation effect.

[0036] In one embodiment, the first feeder 32 feeds material into the coating cavity 312.

[0037] In one embodiment, the second feeder 22 feeds material to the mesh 2121.

[0038] Further, please refer to Figures 1 to 5 As a specific embodiment of the electrode coating device provided by this utility model, multiple coating disks 31 are spaced apart along the axial direction of the first rotating shaft 33. In this way, multiple coating disks 31 can coat insulating material simultaneously.

[0039] Further, please refer to Figures 1 to 5 As a specific embodiment of the electrode coating device provided by this utility model, the multiple coating disks 31 are all ceramic coating disks 31.

[0040] Further, please refer to Figures 1 to 5 In one specific embodiment of the electrode coating device provided by this utility model, each coating disk 31 is detachably connected to the first rotating shaft 33. This makes installing the coating disk 31 very convenient.

[0041] Further, please refer to Figures 1 to 5 As a specific embodiment of the electrode coating apparatus provided by this utility model, for any coating disk 31: the coating disk 31 has a first blanking area 3131 and a second blanking area 3132, and the first coating surface 311 is located between the first blanking area 3131 and the second blanking area 3132; the first blanking area 3131 and the second blanking area 3132 extend along the circumferential direction of the edge of the coating disk 31. In this way, the first blanking area 3131 and the second blanking area 3132 can block the slurry.

[0042] Further, please refer to Figures 1 to 5 As a specific embodiment of the electrode coating device provided by this utility model, both the first blank area 3131 and the second blank area 3132 have grooves.

[0043] Further, please refer to Figures 1 to 5 In one specific embodiment of the electrode coating apparatus provided by this utility model, the opening shape of each coating cavity 312 is honeycomb-shaped. This honeycomb-shaped opening design helps improve the material flowability and uniform distribution during the coating process. The multiple coating cavities 312 with a honeycomb structure can increase the contact surface of the coating disk 31, allowing the insulating material to be more evenly covered on the surface of the foil 6.

[0044] Further, please refer to Figures 1 to 5 In one specific embodiment of the electrode coating apparatus provided by this utility model, a plurality of mesh holes 2121 are respectively composed of multiple mesh hole groups 212, and the mesh holes 2121 in each mesh hole group 212 are evenly distributed. In this way, the multiple mesh holes 2121 in each mesh hole group 212 can be coated more evenly.

[0045] Further, please refer to Figures 1 to 5 In one specific embodiment of the electrode coating apparatus provided by this utility model, the distance between adjacent mesh group 212 is greater than the distance between adjacent mesh holes 2121 within each mesh group 212. This reduces mutual interference between adjacent mesh groups 212 during the coating process.

[0046] Further, please refer to Figures 1 to 5 As a specific embodiment of the electrode coating apparatus provided by this utility model, the second coating mechanism 2 is located upstream of the first coating mechanism 3 along the conveying direction of the foil 6; the electrode coating apparatus also includes a third coating mechanism 4, which is located downstream of the first coating mechanism 3 along the conveying direction of the foil 6. Thus, when the foil 6 passes through the third coating mechanism 4, the third coating mechanism 4 can coat the foil 6.

[0047] In one embodiment, the third coating mechanism 4 can coat a conductive paste onto the first conductive layer 51. The conductive paste coated on the first conductive layer 51 can form a second conductive layer 53. The second conductive layer 53 can protect the first conductive layer 51, and an external circuit can be connected to the second conductive layer 53. The second conductive layer 53 can be electrically connected to the foil 6 through the first conductive layer 51. The second coating mechanism 2, the first coating mechanism 3, and the third coating mechanism 4 are arranged sequentially along the conveying channel 11.

[0048] In one embodiment, the third coating mechanism 4 includes a coating die head disposed on the frame 1.

[0049] In one embodiment, the system further includes: a second roller 72, a first roller 71, and a third roller 73; the second roller 72, the first roller 71, and the third roller 73 are respectively disposed on the frame 1; a second gap is formed between the second roller 72 and the second coating mechanism 2 for the foil 6 to pass through, a first gap is formed between the first roller 71 and the first coating mechanism 3 for the foil 6 to pass through, and a third gap is formed between the third roller 73 and the third coating mechanism 4 for the foil 6 to pass through.

[0050] In one embodiment, foil 6 is aluminum foil.

[0051] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An electrode coating apparatus for coating the surface of a foil (6), characterized in that, include: The first coating mechanism (3) includes: a first rotating shaft (33) and a coating disk (31); The coating disk (31) is sleeved outside the first rotating shaft (33), and the surface of the coating disk (31) has a first coating surface (311) for contacting the foil (6); a plurality of coating cavities (312) are arranged on the first coating surface (311); The second coating mechanism (2) is located upstream or downstream of the first coating mechanism (3) along the conveying direction of the foil (6); the second coating mechanism (2) includes a second rotating shaft (23) and an anilox coating roller (21); the second rotating shaft (23) passes through the anilox coating roller (21), and the surface of the anilox coating roller (21) has a second coating surface (211) for contacting the foil (6); a plurality of anilox holes (2121) are arranged on the surface of the second coating surface (211).

2. The electrode coating apparatus as described in claim 1, characterized in that, The coating disks (31) are provided in multiple spaces along the axial direction of the first rotating shaft (33).

3. The electrode coating apparatus as described in claim 2, characterized in that, All of the coating disks (31) are ceramic coating disks.

4. The electrode coating apparatus as described in claim 2, characterized in that, Each of the coating disks (31) and the first rotating shaft (33) are detachably connected.

5. The electrode coating apparatus as described in claim 1, characterized in that, For any of the coating disks (31): the coating disk (31) has a first blank area (3131) and a second blank area (3132), and the first coating surface (311) is between the first blank area (3131) and the second blank area (3132); the first blank area (3131) and the second blank area (3132) extend along the circumferential direction of the edge of the coating disk (31).

6. The electrode coating apparatus as described in claim 5, characterized in that, Both the first blank area (3131) and the second blank area (3132) have grooves.

7. The electrode coating apparatus as described in claim 1, characterized in that, The opening shape of each of the coating cavities (312) is honeycomb-shaped.

8. The electrode coating apparatus according to any one of claims 1-7, characterized in that, The plurality of mesh holes (2121) respectively form a plurality of mesh hole groups (212), and the mesh holes (2121) in each mesh hole group (212) are evenly distributed.

9. The electrode coating apparatus as described in claim 8, characterized in that, The distance between adjacent mesh groups (212) is greater than the distance between adjacent mesh holes (2121) within each mesh group (212).

10. The electrode coating apparatus according to any one of claims 1-7, characterized in that, Along the conveying direction of the foil (6), the second coating mechanism (2) is located upstream of the first coating mechanism (3); the electrode coating device also includes a third coating mechanism (4), which is located downstream of the first coating mechanism (3) along the conveying direction of the foil (6).

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