Semi-dry method double-side simultaneous coating device

Abstract

The utility model discloses a semi-dry method double-side simultaneous coating device which comprises an unwinding mechanism, a first film-forming thinning mechanism, a second film-forming thinning mechanism, a compounding mechanism, a first gluing mechanism and a second gluing mechanism, and the unwinding mechanism is arranged below the compounding mechanism and used for unwinding a pole piece base material; the first film-forming and thinning mechanism and the second film-forming and thinning mechanism are arranged on the two sides of the compounding mechanism respectively and are both used for providing electrode films, and the electrode films are compounded on the A face and the B face of a pole piece base material through the compounding mechanism to form the electrode pole piece. The first gluing mechanism and the second gluing mechanism are both arranged above the compounding mechanism, the first gluing mechanism is used for gluing the tab of the A surface of the pole piece, and the second gluing mechanism is used for gluing the tab of the B surface of the pole piece. The coating mechanism and the gluing mechanism are additionally arranged on the left side and the right side of the compounding mechanism, so that the double surfaces of the pole piece can be coated at the same time, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of coating technology, specifically to a semi-dry double-sided simultaneous coating device. Background Technology

[0002] Semi-dry coating first prepares the coating material (such as paint or adhesive) into a semi-solid substance with a certain degree of viscosity and fluidity. This process typically takes place in a specialized mixing apparatus, where appropriate amounts of solvent or additives are added to adjust the state of the coating material. During coating, the inherent viscosity of the coating material allows it to adhere well to the object's surface. Furthermore, because the material is semi-solid, it requires less solvent for dilution compared to wet coating, and it is not entirely solvent-free like dry coating. Finally, post-treatment processes such as drying evaporate the solvent from the coating, leaving a uniform and durable coating layer.

[0003] Most current semi-dry coating equipment can only coat one side, which reduces production efficiency and fails to meet production needs. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, this utility model provides a semi-dry double-sided simultaneous coating device, which adds coating mechanisms on both sides of the composite mechanism to achieve simultaneous coating of the electrode sheets on both sides, thereby improving production efficiency.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A semi-dry double-sided simultaneous coating apparatus includes an unwinding mechanism, a first film-forming and thinning mechanism, a second film-forming and thinning mechanism, a laminating mechanism, a first adhesive coating mechanism, and a second adhesive coating mechanism. The unwinding mechanism is located below the laminating mechanism and is used to unwind the electrode substrate. The first film-forming and thinning mechanism and the second film-forming and thinning mechanism are respectively located on both sides of the laminating mechanism. Both the first film-forming and thinning mechanism are used to provide an electrode film. The electrode film is laminated to side A and side B of the electrode substrate by the laminating mechanism to form an electrode electrode. The first adhesive coating mechanism and the second adhesive coating mechanism are both located above the laminating mechanism. The first adhesive coating mechanism is used to apply adhesive to the tabs on side A of the electrode, and the second adhesive coating mechanism is used to apply adhesive to the tabs on side B of the electrode.

[0007] As a further improvement to the above technical solution, the first film-forming and thinning mechanism includes a first conical dual component and a first pair of rollers. The first conical dual component is used to uniformly mix the positive / negative electrode materials to form an electrode film, and the first pair of rollers is used to thin the electrode film to a specified thickness.

[0008] As a further improvement to the above technical solution, a first tension roller assembly is provided between the first pair of rollers assembly and the composite mechanism. Therefore, the first tension roller assembly is used to detect the tension of the electrode film in order to control the feeding speed of the electrode film.

[0009] As a further improvement to the above technical solution, the second film-forming and thinning mechanism includes a second conical dual component and a second pair of rollers. The second conical dual component is used to uniformly mix the positive / negative electrode materials to form an electrode film, and the second pair of rollers is used to thin the electrode film to a specified thickness.

[0010] As a further improvement to the above technical solution, a second tension roller assembly is provided between the second pair of rollers assembly and the composite mechanism. Therefore, the second tension roller assembly is used to detect the tension of the electrode film in order to control the feeding speed of the electrode film.

[0011] As a further improvement to the above technical solution, the semi-dry double-sided simultaneous coating device also includes a thickness gauge, which is used to detect the thickness of the electrode after coating.

[0012] As a further improvement to the above technical solution, the semi-dry double-sided simultaneous coating device also includes a CCD component, which is used to detect whether there are defects in the electrode sheet.

[0013] As a further improvement to the above technical solution, the semi-dry double-sided simultaneous coating device also includes a roller assembly, which is used for supporting and transporting the electrode sheet.

[0014] As a further improvement to the above technical solution, the roller assembly includes several air-bearing rollers to prevent the adhesive applied to the tabs on both sides from contaminating the roller surface.

[0015] As a further improvement to the above technical solution, the semi-dry double-sided simultaneous coating device also includes a cutting assembly, which is connected to the feed end of the composite mechanism and is used to cut the electrode film to the required width.

[0016] The beneficial effects of this invention are as follows: By adding conical double-sided components, opposing roller components, and tension roller components to both sides of the composite mechanism, simultaneous double-sided coating of the electrode sheet can be achieved, thereby improving production efficiency and substrate utilization. The air-floating roller prevents adhesive contamination of the roller surface at the electrode tabs during double-sided coating. Furthermore, the addition of a thickness gauge and CCD component to detect the thickness of the substrate and the presence of defects after coating improves the quality of the electrode sheet coating. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1This is an assembly diagram of a semi-dry double-sided simultaneous coating device according to an embodiment of this utility model;

[0019] Figure 2 yes Figure 1 A magnified view of a portion of the composite mechanism.

[0020] Reference numerals: 1. Frame; 2. Unwinding mechanism; 3. Composite mechanism; 31. First pressure roller; 32. Second pressure roller; 33. Third pressure roller; 34. Fourth pressure roller; 35. First drive roller; 36. Second drive roller; 4. Cutting assembly; 5. First conical double assembly; 6. First pair of rollers assembly; 7. First tension roller assembly; 8. Second conical double assembly; 9. Second pair of rollers assembly; 10. Second tension roller assembly; 11. First glue coating mechanism; 12. Second glue coating mechanism; 13. Air flotation roller; 14. Thickness gauge; 15. First CCD assembly; 16. Second CCD assembly. Detailed Implementation

[0021] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / installations can use accessories such as screws and bolts, or can be directly connected by welding, bonding, etc. The various technical features in this utility model can be combined interactively without contradicting each other.

[0022] Reference Figure 1 This utility model provides a semi-dry double-sided simultaneous coating device, which mainly includes a frame 1 and an unwinding mechanism 2, a first film thinning mechanism, a second film thinning mechanism, a laminating mechanism 3, a first adhesive coating mechanism 11, a second adhesive coating mechanism 12, a roller assembly, a thickness gauge 14, and a CCD assembly mounted on the frame 1. The unwinding mechanism 2 is located below the laminating mechanism 3, while the first and second film thinning mechanisms are located on opposite sides of the laminating mechanism 3. The first and second adhesive coating mechanisms 11 and 12 are both located above the laminating mechanism 3.

[0023] During the coating operation, the electrode substrate is first unwound by the unwinding mechanism 2. Simultaneously, a first film-thinning mechanism provides either a positive or negative electrode film, and a second film-thinning mechanism also provides either a positive or negative electrode film. It can be understood that both the first and second film-thinning mechanisms simultaneously provide a positive electrode film, or simultaneously provide a negative electrode film. Then, the lamination mechanism 3 laminates the electrode films onto both sides (A and B) of the electrode substrate, thus obtaining the electrode electrode. After coating, the electrode is coated with adhesive at the tabs on side A by the first adhesive coating mechanism 11, and at the tabs on side B by the second adhesive coating mechanism 12. Finally, the electrode passes through a thickness gauge 14 and a CCD assembly to detect the thickness of the substrate after coating and to check for defects. Only electrode sheets that meet the standards are allowed to proceed to subsequent processing stations.

[0024] In this embodiment, the first film-forming and thinning mechanism includes a first conical dual-component 5 and a first pair of rollers 6. The first conical dual-component 5 is used to uniformly mix the agglomerated materials of the positive / negative electrode to form a positive electrode film or a negative electrode film. Then, the electrode film is thinned to a specified thickness by the first pair of rollers 6 to increase the energy density of the electrode film, and then the electrode film is pressed onto the A surface of the electrode substrate by the composite mechanism 3.

[0025] Furthermore, a first tension roller assembly 7 is provided between the first pair of rollers assembly 6 and the composite mechanism 3. The tension of the electrode film can be detected by the first tension roller assembly 7, thereby facilitating the control of the electrode film feeding speed.

[0026] Similarly, in this embodiment, the second film-forming and thinning mechanism includes a second conical dual-component 8 and a second pair of rollers 9. The second conical dual-component 8 is used to uniformly mix the agglomerated materials of the positive / negative electrode to form a positive electrode film or a negative electrode film. Then, the electrode film is pressed to a specified thickness by the second pair of rollers 9 to increase the energy density of the electrode film, and then the electrode film is pressed onto the B surface of the electrode substrate by the composite mechanism 3.

[0027] Furthermore, a second tension roller assembly 10 is provided between the second pair of rollers assembly 9 and the composite mechanism 3. The tension of the electrode film can be detected by the second tension roller assembly 10, thereby facilitating the control of the electrode film feeding speed.

[0028] In this embodiment, refer to Figure 2The composite mechanism 3 employs a multi-stage composite mechanism 3, which includes multiple parallel pressure rollers. Specifically, the composite mechanism 3 includes at least four pressure rollers (namely, a first pressure roller 31, a second pressure roller 32, a third pressure roller 33, and a fourth pressure roller 34). The first pressure roller 31 presses the electrode film provided by the first film-thinning mechanism onto the second pressure roller 32, and the fourth pressure roller 34 presses the electrode film provided by the second film-thinning mechanism onto the third pressure roller 33, while the electrode substrate is located in the slit between the second pressure roller 32 and the third pressure roller 33. When the second pressure roller 32 and the third pressure roller 33 rotate simultaneously, the electrode films provided by the first film-thinning mechanism and the second verification mechanism are simultaneously pressed onto both sides of the electrode substrate, thereby completing the simultaneous double-sided coating of the electrode.

[0029] The composite mechanism 3 also includes a first drive roller 36 and a second drive roller 35. The first drive roller 36 is used to adjust the pressure of the first pressure roller 31 acting on the second pressure roller 32, and the second drive roller 35 is used to adjust the pressure of the fourth pressure roller 34 acting on the third pressure roller 33.

[0030] In this embodiment, the CCD assembly includes a first CCD assembly 15 and a second CCD assembly 16, which are used to detect defects on the A-side and B-side of the electrode, respectively.

[0031] In this embodiment, the roller assembly includes several rollers, mainly used to support the substrate, electrode film, and the conveyor belt of the composite electrode sheet. Among them, the roller located between the second coating mechanism 12 and the thickness gauge 14 is an air-floating roller 13. The air-floating roller 13 can make the electrode sheet float 1-2 mm away from the roller surface, which can avoid the glue at the tabs on both sides of the electrode sheet contaminating the roller surface.

[0032] In some embodiments, the semi-dry double-sided simultaneous coating apparatus is also equipped with a cutter assembly 4, which is connected to the feed end of the composite mechanism 3 to cut the electrode film to the required width, ensuring that the width of the output electrode film is consistent and that the product quality is qualified.

[0033] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A semi-dry double-sided simultaneous coating apparatus, characterized in that: The assembly includes an unwinding mechanism (2), a first film-forming and thinning mechanism, a second film-forming and thinning mechanism, a composite mechanism (3), a first coating mechanism (11), and a second coating mechanism (12). The unwinding mechanism (2) is located below the composite mechanism (3) and is used to unwind the electrode substrate. The first film-forming and thinning mechanism and the second film-forming and thinning mechanism are respectively located on both sides of the composite mechanism (3). Both the first film-forming and thinning mechanism and the second film-forming and thinning mechanism are used to provide an electrode film. The electrode film is composited to the A side and B side of the electrode substrate through the composite mechanism (3) to form an electrode electrode. The first coating mechanism (11) and the second coating mechanism (12) are both located above the composite mechanism (3). The first coating mechanism (11) is used to apply adhesive to the tab on the A side of the electrode, and the second coating mechanism (12) is used to apply adhesive to the tab on the B side of the electrode.

2. The semi-dry double-sided simultaneous coating apparatus according to claim 1, characterized in that: The first film thinning mechanism includes a first conical dual component (5) and a first pair of rollers component (6). The first conical dual component (5) is used to uniformly mix and roll the positive / negative electrode materials to form an electrode film, and the first pair of rollers component (6) is used to thin the electrode film to a specified thickness.

3. The semi-dry double-sided simultaneous coating apparatus according to claim 2, characterized in that: A first tension roller assembly (7) is provided between the first roller assembly (6) and the composite mechanism (3), so the first tension roller assembly (7) is used to detect the tension of the electrode film in order to control the feeding speed of the electrode film.

4. The semi-dry double-sided simultaneous coating apparatus according to claim 1, characterized in that: The second film thinning mechanism includes a second conical dual component (8) and a second pair of rollers (9). The second conical dual component (8) is used to uniformly mix and roll the positive / negative electrode materials to form an electrode film, and the second pair of rollers (9) is used to thin the electrode film to a specified thickness.

5. The semi-dry double-sided simultaneous coating apparatus according to claim 4, characterized in that: A second tension roller assembly (10) is provided between the second pair of rollers assembly (9) and the composite mechanism (3), so the second tension roller assembly (10) is used to detect the tension of the electrode film in order to control the feeding speed of the electrode film.

6. The semi-dry double-sided simultaneous coating apparatus according to claim 1, characterized in that: It also includes a thickness gauge (14) used to detect the thickness of the coated electrode.

7. The semi-dry double-sided simultaneous coating apparatus according to claim 1, characterized in that: It also includes a CCD component, which is used to detect whether there are defects in the electrode.

8. The semi-dry double-sided simultaneous coating apparatus according to claim 1, characterized in that: It also includes a roller assembly for supporting and transporting the electrode sheet.

9. A semi-dry double-sided simultaneous coating apparatus according to claim 8, characterized in that: The roller assembly includes several air-bearing rollers (13) to prevent the adhesive applied to the tabs on both sides from contaminating the roller surface.

10. A semi-dry double-sided simultaneous coating apparatus according to claim 1, characterized in that: It also includes a cutter assembly (4), which is connected to the feed end of the composite mechanism (3) for cutting the electrode film to the required width.

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