Pole piece structure and process equipment for pole piece structure

Abstract

The utility model discloses a pole piece structure and process equipment for the pole piece structure. The pole piece structure comprises a base material, a coating layer and an insulating layer, a dressing area and blank areas are formed on the base material, the blank areas are arranged on the two sides of the dressing area, and the blank areas are suitable for forming tabs; the coating layer is arranged in the dressing area, and the coating layer is matched with the dressing area in shape; the insulating layer is arranged between the dressing area and the blank area, and the insulating layer is a UV insulating material layer. By arranging the insulating layer between the dressing area and the blank area, the contact between the tab and the coating layer on the dressing area can be avoided, the short circuit condition is avoided, the safety and the reliability of the pole piece structure are effectively improved, and compared with the ceramic material adopted by the traditional insulating layer, the UV insulating material layer and the coating layer cannot be blended, so that the service life of the pole piece structure is prolonged. And the loss of the battery capacity is effectively reduced, the technological process of the pole piece structure is simplified, the production efficiency and the production yield are improved, the production cost is reduced, and meanwhile, the environmental pollution and the health hazard are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery pole piece technical field especially is related to a pole piece structure and process equipment for pole piece structure. BACKGROUND

[0002] In prior art, the pole piece insulating layer material adopts ceramic material, the step of realizing insulating layer coating of ceramic material is more complex, and the solidification speed of ceramic material is slower, resulting in that the production efficiency of pole piece structure is lower. SUMMARY

[0003] The utility model discloses at least one of the technical problems in prior art. To this end, one purpose of the utility model is to provide a pole piece structure, which can improve the production efficiency of the pole piece structure.

[0004] A second purpose of the utility model is to provide a process equipment for pole piece structure, and the pole piece structure is processed.

[0005] According to the pole piece structure of the utility model first aspect embodiment, the pole piece structure includes: base material, coating layer and insulating layer, the base material forms with the application area and the blank area, the blank area is equipped with both sides of the application area, and the blank area is suitable for forming the lug; The coating layer is arranged in the application area, and the shape of the coating layer is matched with the application area; The insulating layer is arranged between the application area and the blank area, and the insulating layer is a UV insulating material layer.

[0006] According to the pole piece structure of the utility model embodiment, by arranging the insulating layer between the application area and the blank area, the lug can be prevented from contacting the coating layer on the application area, the short circuit condition can be avoided, the safety and reliability of the pole piece structure are effectively improved, compared with the ceramic material used in the traditional insulating layer, the UV insulating material layer and the coating layer will not appear the fusion condition, effectively reduce the loss of battery capacity, simplify the process flow of pole piece structure, improve production efficiency and production yield, reduce production cost, at the same time, reduce environmental pollution and health hazards.

[0007] In some embodiments, the blank area and the application area are arranged along a first direction, the insulating layer extends along a second direction, and the first direction and the second direction are perpendicular; The width of the insulating layer along the first direction is L1, and the L1 satisfies: 5mm≤L1≤8mm.

[0008] In some embodiments, the insulating layer is arranged separately from the application area; The distance between the insulating layer and the application area is L2, and the L2 satisfies: 0≤L2≤0.1mm.

[0009] In some embodiments, a projection of the insulating layer along a thickness direction of the pole piece structure is at least partially located within a projection of the coating area along the thickness direction of the pole piece structure.

[0010] In some embodiments, a thickness of the insulating layer is H, and the H satisfies: 5 μm≤H≤30 μm.

[0011] According to the process equipment for the pole piece structure in the second aspect of the present application, the pole piece structure processed is the pole piece structure in any one of the above first aspect of the present application.

[0012] In some embodiments, the process equipment comprises: a feeding device, the feeding device is suitable for conveying the pole piece structure, and a cleanliness of the feeding device is that a number of dust particles with a diameter greater than or equal to 0.5 μm in each cubic meter of air is less than or equal to 100,000.

[0013] In some embodiments, the process equipment further comprises: a spraying device, the spraying device is arranged on at least one side of the thickness direction of the pole piece structure, and the spraying device is suitable for spraying the insulating layer of the pole piece structure; the spraying device comprises a plurality of spray heads, and the plurality of spray heads are arranged at intervals.

[0014] In some embodiments, the process equipment further comprises: a leveling device, the leveling device is suitable for leveling the insulating layer of the pole piece structure, and a cleanliness of the leveling device is that a number of dust particles with a diameter greater than or equal to 0.5 μm in each cubic meter of air is less than or equal to 100,000; and the leveling device is an infrared leveling device.

[0015] In some embodiments, the process equipment further comprises: a curing device, the curing device is arranged on at least one side of the thickness direction of the pole piece structure, and the curing device is suitable for curing the insulating layer of the pole piece structure; and the curing device is a UV curing device.

[0016] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0018] Figure 1 is a schematic view according to the first aspect of the present application;

[0019] Figure 2 is a schematic view of the working of the spraying device according to the second aspect of the present application.

[0020] REFERENCE NUMERALS

[0021] 100. Electrode structure;

[0022] 10. Substrate; 11. Dressing area; 12. Blank area;

[0023] 20. Coating layer;

[0024] 30. Insulation layer;

[0025] 40. Spraying equipment;

[0026] A. First direction; B. Second direction. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-2 The electrode structure 100 according to an embodiment of the present utility model is described. The electrode structure 100 includes: a substrate 10, a coating layer 20 and an insulating layer 30.

[0028] Specifically, such as Figure 1 As shown, the substrate 10 has a coating area 11 and a blank area 12, with the blank area 12 located on both sides of the coating area 11. The blank area 12 is suitable for forming tabs. A coating layer 20 is located in the coating area 11, and the shape of the coating layer 20 is adapted to the shape of the coating area 11. An insulating layer 30 is located between the coating area 11 and the blank area 12, and the insulating layer 30 is a UV insulating material layer.

[0029] That is, the coating area 11 on the substrate 10 is suitable for applying slurry and forming a coating layer 20. The blank areas 12 on both sides of the coating area 11 are formed into multiple tabs through a slitting process. The insulating layer 30 is disposed on the side of the tabs adjacent to the coating layer 20. The insulating layer 30 is suitable for insulating the tabs from the coating layer 20. In this embodiment, the substrate 10 can be aluminum foil, and the insulating layer 30 can be UV topcoat. UV topcoat (Ultraviolet Curing Paint), also known as ultraviolet light curing paint, has the characteristics of good environmental protection, chemical resistance, physical damage resistance, high hardness, fast drying, simple process, low cost, high precision, and no mixing.

[0030] According to the electrode structure 100 of this utility model embodiment, by placing the insulating layer 30 between the coating area 11 and the blank area 12, the electrode tab can be prevented from contacting the coating layer 20 on the coating area 11, thus avoiding short circuits. This effectively improves the safety and reliability of the electrode structure 100. Compared with the ceramic material used in the traditional insulating layer 30, the UV insulating material layer and the coating layer 20 will not fuse, effectively reducing battery capacity loss, simplifying the process flow of the electrode structure 100, improving production efficiency and yield, reducing production costs, and at the same time, reducing environmental pollution and health hazards.

[0031] According to some embodiments of the present application, as shown in Figure 1 The blank area 12 and the dressing area 11 are arranged along the first direction A, the insulating layer 30 extends along the second direction B, and the first direction A and the second direction B are perpendicular; the width of the insulating layer 30 along the first direction A is L1, and L1 satisfies: 5mm≤L1≤8mm.

[0032] That is, the blank area 12 and the dressing area 11 both extend along the second direction B, and the blank area 12 is arranged on both sides of the dressing area 11 along the first direction A, the insulating layer 30 extends along the second direction B and is arranged between the blank area 12 and the dressing area 11. In this embodiment, the second direction B is the coating running direction.

[0033] When the width of the insulating layer 30 along the first direction A is less than 5mm, the width of the insulating layer 30 along the first direction A is too small, which may cause the tab to contact the coating layer 20 on the dressing area 11, and easily cause short circuit; when the width of the insulating layer 30 along the first direction A is greater than 8mm, the width of the insulating layer 30 along the first direction A is too large, which may cause the curing time of the insulating layer 30 to be longer, reduce the production efficiency of the tab structure 100, and increase the production cost. For example, L1=6mm.

[0034] Therefore, the blank area 12 and the dressing area 11 are arranged along the first direction A, the insulating layer 30 extends along the second direction B, and the width range of the insulating layer 30 along the first direction A is limited, which can avoid the tab from contacting the coating layer 20 on the dressing area 11, avoid short circuit, improve the safety and reliability of the tab structure 100, and at the same time, can reduce the amount of the insulating layer 30, improve the production efficiency of the tab structure 100, and reduce the production cost.

[0035] According to some embodiments of the present application, the insulating layer 30 is arranged apart from the dressing area 11; the distance between the insulating layer 30 and the dressing area 11 is L2, and L2 satisfies: 0≤L2≤0.1mm.

[0036] In this embodiment, the insulating layer 30 and the dressing area 11 are arranged apart along the first direction A, and when the distance between the insulating layer 30 and the dressing area 11 is greater than 0.1mm, the distance between the insulating layer 30 and the dressing area 11 is too large, the cross-sectional area of the tab is small, the conductivity of the tab is poor, and the performance and service life of the battery are affected. For example, L2=0.1mm.

[0037] Therefore, the insulating layer 30 is arranged apart from the dressing area 11, which can provide a larger dressing amount for the dressing area 11, limit the distance range between the insulating layer 30 and the dressing area 11, and effectively improve the conductivity of the tab, thereby improving the capacity and use performance of the battery and prolonging the service life of the battery.

[0038] According to some embodiments of the present application, the projection of the insulating layer 30 along the thickness direction of the pole piece structure 100 is at least partially located within the projection of the coating area 11 along the thickness direction of the pole piece structure 100.

[0039] Optionally, the projection of the insulating layer 30 along the thickness direction of the pole piece structure 100 can partially overlap with the projection of the coating area 11 along the thickness direction of the pole piece structure 100. In this way, the projection of the insulating layer 30 along the thickness direction of the pole piece structure 100 is at least partially located within the projection of the coating area 11 along the thickness direction of the pole piece structure 100, which can effectively increase the cross-sectional area of the tab, improve the performance of the battery, and at the same time ensure the insulation between the tab and the insulating layer 30 on the coating area 11, thereby improving the safety and reliability of the pole piece structure 100.

[0040] According to some embodiments of the present application, the thickness of the insulating layer 30 is H, and H satisfies: 5 μm≤H≤30 μm.

[0041] When the thickness of the insulating layer 30 is less than 5 μm, the thickness of the insulating layer 30 is relatively small, which may result in that the weight of the insulating layer 30 is relatively light, and the insulating layer 30 is prone to displacement in subsequent processes. When the thickness of the insulating layer 30 is greater than 30 μm, the thickness of the insulating layer 30 is relatively large, which may result in that the curing speed of the insulating layer 30 is relatively slow, and at the same time, the cost is increased.

[0042] In this way, by limiting the thickness range of the insulating layer 30, the connection strength of the insulating layer 30 and the base material 10 can be improved, the relative displacement between the insulating layer 30 and the coating area 11 and the blank area 12 can be avoided, and at the same time, the curing effect of the insulating layer 30 can be optimized, the curing speed of the insulating layer 30 can be improved, and the production cost can be reduced.

[0043] According to the process equipment for the pole piece structure 100 of the second aspect of the present application, the processed pole piece structure 100 is the pole piece structure 100 of any one of the above-mentioned first aspect of the embodiment.

[0044] In the present embodiment, the pole piece structure 100 is processed by the process equipment for the pole piece structure 100, and the intelligent operation control in the processes such as feeding, spraying, leveling, and curing can simplify the processing flow of the pole piece structure 100. At the same time, the solid content of the insulating layer 30 reaches more than 95%, there is no volatilization of organic solvents in the use process, all the contained components are cured into a film, environmental pollution and health hazards are reduced, no additional process is needed, the insulation of the pole piece structure 100 is improved, no dosing and stirring steps are needed, and no coating process in the coating die is needed, the production yield and production efficiency of the pole piece structure 100 are improved, batch production of the pole piece structure 100 is realized, high automation is realized, and the cost of equipment and materials is reduced.

[0045] According to some embodiments of the present application, the process equipment comprises: a feeding device, the feeding device is suitable for conveying the pole piece structure 100, and the cleanliness of the feeding device is that the number of dust particles with a diameter greater than or equal to 0.5 microns in each cubic meter of air is less than or equal to 100,000.

[0046] That is, the UV topcoat is arranged in the feeding device, the feeding device is arranged below the pole piece structure 100 along the thickness direction of the pole piece structure 100, the feeding device comprises a conveyor belt, and the pole piece structure 100 can move along the second direction B following the conveyor belt. Therefore, the cleanliness of the feeding device is that the number of dust particles with a diameter greater than or equal to 0.5 microns in each cubic meter of air is less than or equal to 100,000, that is, the cleanliness of the feeding device is greater than 100,000 levels, the machining precision of the pole piece structure 100 can be improved, and meanwhile, the adhesion of too many foreign matters in the coating layer 20 is avoided, thereby affecting the working effect and service life of the pole piece structure 100.

[0047] According to some embodiments of the present application, as shown in Figure 2 the process equipment further comprises: a spraying device 40, the spraying device 40 is arranged on at least one side of the thickness direction of the pole piece structure 100, and the spraying device 40 is suitable for spraying the insulating layer 30 of the pole piece structure 100; the spraying device 40 comprises a plurality of spray heads, and the plurality of spray heads are arranged at intervals.

[0048] That is, the spraying device 40 is arranged on one side adjacent to the coating area 11 along the thickness direction of the pole piece structure 100, in the embodiment, the spraying device 40 comprises two spray heads, and the two spray heads are arranged at intervals between the coating area 11 and the blank area 12 along the first direction A.

[0049] In addition, according to the specifications of different pole piece structures 100, the spraying pressure setting, spray head opening, spraying angle adjustment, distance between the spray head and the foil, and spraying speed setting of the spraying device 40 can be adjusted accordingly.

[0050] Therefore, the spraying device 40 is arranged on at least one side of the thickness direction of the pole piece structure 100, the operator opens the spraying button, and the spraying device 40 can spray the insulating layer 30 according to the preset speed, angle and distance, thereby realizing the automation of the spraying process, improving the machining efficiency of the pole piece structure 100, and reducing the labor cost.

[0051] According to some embodiments of the present application, the process equipment further comprises: a leveling device, the leveling device is suitable for leveling the insulating layer 30 of the pole piece structure 100, the cleanliness of the leveling device is that the number of dust particles with a diameter greater than or equal to 0.5 microns in each cubic meter of air is less than or equal to 100,000, and the leveling device is an infrared leveling device.

[0052] In the embodiment, after the UV topcoat is sprayed between the dressing area 11 and the blank area 12 to form the insulation layer 30 by the spraying device 40, the infrared leveling device levels the insulation layer 30, the tension of the dressing area 11 is used to keep the stability of the pole piece structure 100 during the running process, and the pole piece structure 100 is prevented from being wrinkled to affect the leveling effect of the insulation layer 30, meanwhile, since the cleanliness of the leveling device is that the number of dust particles with a diameter greater than or equal to 0.5 μm in each cubic meter of air is less than or equal to 100,000, the insulation layer 30 can be prevented from adhering to many foreign matters to affect the insulation effect of the insulation layer 30 and the working effect of the pole piece structure 100, static electricity is prevented from being generated, and the safety and reliability of the pole piece structure 100 are improved.

[0053] According to some embodiments of the present application, the process equipment further comprises: a curing device, the curing device is arranged on at least one side of the thickness direction of the pole piece structure 100, and the curing device is suitable for curing the insulation layer 30 of the pole piece structure 100; and the curing device is a UV curing device.

[0054] In the embodiment, the curing device is arranged on one side adjacent to the insulation layer 30 along the thickness direction of the pole piece structure 100, after the leveling device levels the insulation layer 30, the UV curing device accelerates the curing of the insulation layer 30 by irradiating the insulation layer 30 with ultraviolet rays, in addition, according to the insulation layer 30 with different sizes, the curing effect can be adjusted by increasing the number of ultraviolet irradiation systems or adjusting the irradiation power, the rapid curing of the insulation layer 30 is realized, and thus the processing efficiency of the pole piece structure 100 is improved, and the batch production of the pole piece structure 100 is realized.

[0055] Optionally, the process equipment further comprises a detection device, the detection device is arranged on at least one side of the thickness direction of the pole piece structure 100, in the embodiment, the detection device comprises a CCD detection device and a micrometer, the CCD detection device is suitable for detecting the width of the insulation layer 30, and the micrometer is suitable for detecting the spraying thickness of the insulation layer 30, thus, the processing precision and the processing quality of the insulation layer 30 can be effectively improved by arranging the detection device such as the CCD detection device and the micrometer, and thus the production efficiency and the reliability of the pole piece structure 100 are improved.

[0056] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0057] In the description of the present application, "first feature", "second feature" can include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more. In the description of the present application, the "above" or "below" of the first feature to the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. In the description of the present application, the "above", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature.

[0058] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example.

[0059] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An electrode structure, characterized in that, include: A substrate having a dressing area and a blank area, the blank area being located on both sides of the dressing area and adapted to form tabs; A coating layer is disposed in the dressing area, and the shape of the coating layer is adapted to the dressing area; An insulating layer is disposed between the dressing area and the blank area. The insulating layer is a UV insulating material layer. The projection of the insulating layer along the thickness direction of the electrode structure is at least partially located within the projection of the dressing area along the thickness direction of the electrode structure.

2. The electrode structure according to claim 1, characterized in that, The blank area and the dressing area are arranged along a first direction, and the insulating layer extends along a second direction, wherein the first direction and the second direction are perpendicular to each other. The width of the insulating layer along the first direction is L1, and L1 satisfies: 5mm≤L1≤8mm.

3. The electrode structure according to claim 1, characterized in that, The insulating layer is spaced apart from the dressing area; The distance between the insulating layer and the dressing area is L2, and L2 satisfies: 0≤L2≤0.1mm.

4. The electrode structure according to any one of claims 1-3, characterized in that, The thickness of the insulating layer is H, and H satisfies: 5μm≤H≤30μm.

5. A process equipment for electrode structures, characterized in that, The processed electrode structure is the electrode structure according to any one of claims 1-4.

6. The process equipment for electrode structures according to claim 5, characterized in that, The process equipment includes: A feeding device, adapted to convey the electrode structure, wherein the cleanliness of the feeding device is such that the number of dust particles with a diameter greater than or equal to 0.5 μm per cubic meter of air is less than or equal to 100,000.

7. The process equipment for electrode structures according to claim 5, characterized in that, Also includes: A spraying device is disposed on at least one side of the electrode structure in the thickness direction, and the spraying device is adapted to spray the insulating layer of the electrode structure; The spraying device includes multiple spray heads, which are spaced apart.

8. The process equipment for electrode structures according to claim 5, characterized in that, Also includes: A leveling device, the leveling device being adapted to level the insulating layer of the electrode structure, wherein the cleanliness of the leveling device is such that the number of dust particles with a diameter greater than or equal to 0.5 μm in each cubic meter of air is less than or equal to 100,000; The leveling device is an infrared leveling device.

9. The process equipment for electrode structures according to claim 5, characterized in that, Also includes: A curing device is disposed on at least one side of the electrode structure in the thickness direction, and the curing device is adapted to cure the insulating layer of the electrode structure; The curing device is a UV curing device.

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