Encapsulation device

Abstract

This utility model relates to the field of film coating technology, specifically providing a film coating device. It aims to solve the problems of low yield or high production cost of existing film coating machines. The film coating device of this utility model includes a pressure roller assembly and a film application assembly. The pressure roller assembly includes a first pressure roller, through which the film can be wrapped. The film application assembly includes a first air knife located on the first side of the first pressure roller. The product to be packaged moves from the second side to the first side of the first pressure roller, the first pressure roller and the first air knife bring the film close to the product, and the first air knife adheres the film to the surface of the product. The blowing action of the air knife allows the film to adhere tightly to the surface of the product, and also allows for smooth film application even in uneven areas. The blowing action applies sufficient pressure to each area, preventing air bubbles. During the blowing process, the film gradually adheres to the product, preventing wrinkles. Furthermore, it improves the yield of high-quality products, reduces the production of defective products, and lowers production costs.

Description

Technical Field

[0001] This utility model relates to the field of coating technology, and specifically provides a coating device. Background Technology

[0002] Lithium batteries include cylindrical batteries, prismatic batteries, and pouch lithium batteries. Among them, prismatic lithium batteries undergo a blue film coating process before entering the module packaging. This process involves wrapping the battery with a blue protective film, which provides insulation, waterproofing, dustproofing, and corrosion protection.

[0003] Currently, most battery pack blue film is applied by automated coating equipment. Existing coating machines use a coating method that first coats the large surface and then the sides. The coating method involves using various types of rubber rollers to press the blue film onto the battery surface, using the rolling of the rubber rollers to adhere the blue film to the battery surface.

[0004] However, the average yield of this type of coating machine is only between 85% and 90%, with defective products mostly caused by bubbles or wrinkles on the battery surface. This results in significant production losses, waste of blue film material, and increased unnecessary manual film removal costs. Moreover, this type of coating machine is not compatible with cells with varying degrees of concavity.

[0005] To solve this problem, UV spraying equipment is used to spray protective paint onto the batteries instead of blue film coating equipment. However, this method has a higher coating cost, and the cost of the spraying equipment is also relatively high.

[0006] Therefore, there is an urgent need for a coating device to solve the above-mentioned technical problems. Utility Model Content

[0007] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problems of low yield or high production cost of existing coating machines.

[0008] In a first aspect, the present invention provides a coating device, the coating device comprising:

[0009] A pressure roller assembly, comprising a first pressure roller that allows a film to be wound through it;

[0010] A film-applying assembly, comprising a first air knife located on a first side of the first pressure roller;

[0011] In this process, the item to be packaged moves from the second side of the first pressure roller opposite to the first side toward the first side, the first pressure roller brings the film close to the item to be packaged, and the first air knife makes the film adhere to the surface of the item to be packaged.

[0012] In a specific embodiment of the above-described coating device, the pressure roller assembly further includes a second pressure roller, which is spaced apart from the first pressure roller, and the film can be wound around the second pressure roller;

[0013] The film application assembly further includes a second air knife, the first air knife and the second air knife are arranged at intervals, and the second air knife is located on the first side of the second pressure roller;

[0014] The packaged item moves between the first pressure roller and the second pressure roller, which bring the film close to the packaged item, and the first air knife and the second air knife make the film adhere to the surface of the packaged item.

[0015] In a specific embodiment of the above-described coating device, the first pressure roller and the second pressure roller are symmetrically arranged; and / or

[0016] The first air knife and the second air knife are arranged symmetrically.

[0017] In a specific embodiment of the above-mentioned wrapping device, the angle and distance between the air nozzle forming the air knife and the packaged item are adjustable, and the air speed of the air knife is adjustable.

[0018] In a specific embodiment of the above-described coating apparatus, a heating element is provided on the first pressure roller for heating the film; and / or

[0019] The second pressure roller is equipped with a heating element for heating the film.

[0020] In a specific embodiment of the above-described coating apparatus, the coating apparatus further includes a feeding roller disposed on the side of the first pressure roller away from the second pressure roller. The feeding roller is capable of storing the film and is used to feed the film to the first pressure roller; and / or

[0021] The coating device further includes a storage roller disposed on the side of the second pressure roller away from the first pressure roller, the film portion being wound around the storage roller, and the storage roller being used to feed the film to the second pressure roller.

[0022] In a specific embodiment of the above-mentioned wrapping device, the wrapping device further includes a driving mechanism, which includes a linear drive member and a first clamping member. The first clamping member is disposed at the output end of the linear drive member. The first clamping member is used to clamp the packaged item, and the linear drive member is used to drive the packaged item to move from the second side of the first pressure roller to the first side.

[0023] In a specific embodiment of the above-mentioned wrapping device, the wrapping device further includes a cutting mechanism, which is used to cut the film after the wrapping of the item to be packaged is completed in one operation.

[0024] In a specific embodiment of the above-mentioned coating device, the coating device further includes a stretching mechanism, which includes a driving member and a second clamping member. The second clamping member is disposed at the output end of the driving member and is used to clamp the free end of the film. The driving member drives the second clamping member to carry the film to the storage roller so that the storage roller can wind up the film.

[0025] In a specific embodiment of the above-described coating apparatus, the coating apparatus further includes a guiding component, which includes an auxiliary roller disposed between the feeding roller and the first pressure roller for guiding the film.

[0026] With the above technical solution, the wrapping device of this utility model includes a pressure roller assembly and a film application assembly. The pressure roller assembly includes a first pressure roller, through which the film can pass. The film application assembly includes a first air knife located on the first side of the first pressure roller. The packaged item moves from the second side to the first side of the first pressure roller. The first pressure roller brings the film close to the packaged item, and the first air knife adheres the film to the surface of the packaged item. After the first pressure roller brings the film close, the first air knife blows the film, ensuring it adheres tightly to the surface of the packaged item. Because the air knife can blow away uneven areas, it allows for successful film application even in these areas. Moreover, the blowing action, relative to the roller pressure, ensures sufficient pressure is applied to each area, preventing air bubbles. Furthermore, due to the gradual blowing action as the packaged item moves relative to the air knife, the film gradually adheres to the packaged item during the blowing process, preventing wrinkles from forming on the surface. This wrapping device can significantly improve the yield of high-quality products, reduce the production of defective products, thereby avoiding production losses and unnecessary costs associated with handling defective products.

[0027] Moreover, the coating device of this invention has a simpler structure than UV spraying equipment, and lower installation and maintenance costs, thus reducing production costs.

[0028] In addition, the pressure roller assembly includes a first pressure roller and a second pressure roller arranged at intervals, and the film application assembly includes a first air knife and a second air knife arranged at intervals. The first pressure roller and the second pressure roller are symmetrically arranged, and the first air knife and the second air knife are symmetrically arranged; this can ensure that the upper and lower sides of the packaged item can be filmed simultaneously, thus improving the film application efficiency.

[0029] The angle and distance between the air nozzle forming the air knife and the packaged item are adjustable, and the air speed of the air knife is also adjustable. The air nozzle and air speed can be adjusted according to the properties of the film and the surface properties of the packaged item to ensure that they match the current working conditions and thus achieve the best film application effect.

[0030] The first pressure roller is equipped with a heating element for heating the film; the second pressure roller is equipped with a heating element for heating the film; this can enhance the shaping ability of the film and ensure a better film application effect. Attached Figure Description

[0031] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0032] Figure 1 This is a schematic diagram of the structure of the coating device provided by this utility model. Figure 1 ;

[0033] Figure 2 This is a schematic diagram of the structure of the coating device provided by this utility model. Figure 2 .

[0034] List of reference numerals in the attached diagram: 1. Feeding roller; 2. Auxiliary roller; 31. First pressure roller; 32. Second pressure roller; 41. First air knife; 42. Second air knife; 5. Storage roller; 10. Item to be packaged. Detailed Implementation

[0035] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0036] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] like Figure 1 and 2 As shown, this embodiment discloses a coating device, which includes a pressure roller assembly and a film application assembly.

[0039] The coating device is described below with reference to two embodiments:

[0040] Example 1

[0041] The pressure roller assembly includes a first pressure roller 31, which allows the film to be wound around it; the film-applying assembly includes a first air knife 41, wherein the first air knife 41 is located on a first side of the first pressure roller 31. The item to be packaged 10 moves from a second side of the first pressure roller 31 opposite to the first side towards the first side. The first pressure roller 31 brings the film close to the item to be packaged 10, and the first air knife 41 adheres the film to the surface of the item to be packaged 10. In the direction of movement of the item to be packaged 10, the front end side of the item to be packaged 10 is the first side, and the rear end side is the second side.

[0042] After the first pressure roller 31 brings the film close, the first air knife 41 blows the film, ensuring it adheres tightly to the surface of the item to be packaged 10. Because the air knife can blow away uneven areas, the film can be successfully applied even to these areas. Furthermore, the blowing action, compared to roller pressure, ensures sufficient pressure is applied to each area, preventing air bubbles. Moreover, the gradual blowing action, with the item to be packaged 10 moving relative to the air knife, ensures the film gradually adheres to the item, preventing wrinkles. This wrapping device significantly improves the yield of high-quality products, reduces the production of defective products, avoids production losses, and eliminates unnecessary costs associated with handling defective products.

[0043] Moreover, the coating device of this invention has a simpler structure than UV spraying equipment, and lower installation and maintenance costs, thus reducing production costs.

[0044] Example 2

[0045] The pressure roller assembly includes a first pressure roller 31 and a second pressure roller 32 spaced apart, and the film can be wound around the first pressure roller 31 and the second pressure roller 32; specifically, the first pressure roller 31 and the second pressure roller 32 are spaced apart vertically and are arranged symmetrically vertically.

[0046] The film application assembly includes a first air knife 41 and a second air knife 42 spaced apart. The first air knife 41 is located on the first side of the first pressure roller 31, and the second air knife 42 is located on the first side of the second pressure roller 32. Specifically, the first air knife 41 and the second air knife 42 are spaced apart vertically and are arranged symmetrically vertically.

[0047] The package 10 is moved from the second side to the first side of the first pressure roller 31 between the first pressure roller 31 and the second pressure roller 32. The first pressure roller 31 and the second pressure roller 32 bring the film close to the package 10, and the first air knife 41 and the second air knife 42 make the film adhere to the surface of the package 10.

[0048] In this embodiment, the packaged item 10 is specifically a square battery. In other embodiments, the packaged item 10 can also be other square products, such as square speakers or building blocks, etc. In this embodiment, the film is specifically a blue film; in other embodiments, it can also be other protective films.

[0049] Specifically, the first pressure roller 31 and the second pressure roller 32 are positioned close to the packaged item 10. However, when the packaged item 10 moves between the first pressure roller 31 and the second pressure roller 32, it does not contact the film on the rollers; a certain gap exists between them. This arrangement allows the film to adhere more closely to the surface of the square battery, enabling the air knife to perform the film application operation. The gap h between the first pressure roller 31 and the second pressure roller 32 and the square battery is controlled to be 0 < h ≤ 3 mm.

[0050] The first air knife 41 and the second air knife 42 are both air knives. Each air knife is formed by an air supply device and an air nozzle. The air supply device supplies air to the air nozzle, which then ejects the air to form the air knife. The angle and distance between the air nozzle and the packaged item 10 are adjustable, ensuring that the angle and distance between the air knife and the surface of the square battery are also adjustable. Furthermore, the air speed of the air knife is adjustable. Adjusting these three parameters allows for optimal film application. Even when the battery surface is uneven or concave, using an air knife ensures a tight bond between the film and the battery surface without bubbles or wrinkles, improving the yield rate and reducing production costs.

[0051] Regarding the first air knife 41 and the second air knife 42, it should be noted that although both are air knives in this embodiment, this is not a limitation of the present invention. Without departing from the principle of the invention, those skilled in the art can choose in other embodiments that both the first air knife 41 and the second air knife 42 are scrapers. However, scrapers are only suitable for situations where the battery surface is relatively smooth and there are no concave areas.

[0052] The first pressure roller 31 is equipped with a heating element for heating the film; the second pressure roller 32 is equipped with a heating element for heating the film. The heating element is specifically an electric cell installed inside the pressure roller or a heating mesh installed on the surface of the pressure roller, which enables the pressure roller to heat the film, improve the film's shaping ability, and make it easier for the film to be bonded to the packaged item 10 during lamination.

[0053] Preferably, the coating device further includes a feeding roller 1 and a storage roller 5. The feeding roller 1 is disposed on the side of the first pressure roller 31 away from the second pressure roller 32. The feeding roller 1 can store film and is used to feed film to the first pressure roller 31 and to feed film to the storage roller 5. The feeding roller 1 is disposed at the output end of a first drive motor, which drives the feeding roller 1 to rotate to release the film. Moreover, the driving force and speed of the first drive motor are adjustable, thereby controlling the tension of the film.

[0054] The storage roller 5 is located on the side of the second pressure roller 32 away from the first pressure roller 31. A portion of the film is wound onto the storage roller 5, which is used to feed the film to the second pressure roller 32. The storage roller 5 also winds the film to temporarily store it. The unloading roller 1 is located at the output end of the second drive motor, which drives the unloading roller 1 to rotate, releasing or winding the film. The driving force and speed of the second drive motor are adjustable, thus controlling the film tension. Specifically, when applying film to a battery, the second drive motor drives the storage roller 5 to unwind; after one application is completed, the second drive motor drives the storage roller 5 to wind up; the winding length is the length required for one application.

[0055] The package 10 moves from the second side to the first side of the first pressure roller 31. This can be because the package 10 moves while the pressure roller assembly and the film application assembly remain stationary; or the package 10 remains stationary while the pressure roller assembly and the film application assembly move; or the package 10, the pressure roller assembly, and the film application assembly all move.

[0056] The coating device also includes a guiding assembly, which includes auxiliary rollers 2. The auxiliary rollers 2 are positioned between the feeding roller 1 and the first pressure roller 31 to guide the film. In this embodiment, three auxiliary rollers 2 are arranged sequentially between the feeding roller 1 and the first pressure roller 31. The auxiliary roller 2 closest to the first pressure roller 31 is located directly above the adhesive roller, while the other two auxiliary rollers 2 are spaced vertically apart. This allows the film to undulate as it passes over the multiple auxiliary rollers 2, resulting in a more stable surface tension after adjustment.

[0057] Preferably, the wrapping device further includes a drive mechanism, which includes a linear drive and a first clamping member. The first clamping member is disposed at the output end of the linear drive and is used to clamp the packaged item 10. The linear drive is used to drive the packaged item 10 to move from the second side to the first side of the first pressure roller 31. Specifically, the first clamping member is a gripper, specifically a gripper conventional in the field of gripping, the specific structure of which will not be described in detail in this application. The linear drive is specifically an electric cylinder or a pneumatic cylinder, etc.

[0058] Preferably, the wrapping device further includes a cutting mechanism for cutting the film after the package 10 has been wrapped once. Specifically, it cuts off excess film at the first pressure roller 31 and the second pressure roller 32, so that there is no excess film on the package 10; and separates the packaged film from the film on the feed roller 1.

[0059] Preferably, the coating device further includes a stretching mechanism, which includes a driving member and a second clamping member. The second clamping member is disposed at the output end of the driving member and is used to clamp the free end of the film. Specifically, the second clamping member is a conventional clamping mechanism in the field of film clamping, and its specific structure will not be described in detail in this application. The driving member drives the second clamping member to carry the film to the storage roller 5, so that the storage roller 5 can wind the film. The driving member is a linear driving member, which can drive the film downwards to the storage roller 5, and then the storage roller 5 winds the film for the next coating of the battery.

[0060] The coating process of this coating device is as follows: the surface tension of the film is controlled within a suitable range by controlling the driving force and speed of the first and second drive motors; the first clamping member of the drive mechanism clamps the battery, moving it from the second side to the first side of the first pressure roller 31; the front end face of the battery abuts against the film, and the first and second pressure rollers 31 and 32 also press the film closer to the surface of the square battery, making the film adhere to the battery surface; then, an air knife is used to blow the film, making it tightly adhere to the surface of the square battery. During the coating process, both the unwinding roller 1 and the storage roller 5 need to unwind to provide film for coating. After one coating is completed, the cutting mechanism cuts the film, and then the drive mechanism removes the coated square battery. Afterwards, the stretching mechanism clamps and stretches the film, moving it to the storage roller 5, and the storage roller 5 rewinds the film to the amount required for one coating.

[0061] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. An encapsulation device, characterized in that The coating device includes: A pressure roller assembly, comprising a first pressure roller (31) that allows a film to be wound around it; and The film application assembly includes a first air knife (41) located on a first side of the first pressure roller (31); In this process, the packaged item (10) moves from the second side of the first pressure roller (31) opposite to the first side to the first side, the first pressure roller (31) brings the film close to the packaged item (10), and the first air knife (41) makes the film adhere to the surface of the packaged item (10).

2. The encapsulation device of claim 1, wherein, The pressure roller assembly further includes a second pressure roller (32), which is spaced apart from the first pressure roller (31), and the film can be wound around the second pressure roller (32); The film application assembly also includes a second air knife (42), the first air knife (41) and the second air knife (42) are spaced apart, and the second air knife (42) is located on the first side of the second pressure roller (32); The packaged item (10) moves between the first pressure roller (31) and the second pressure roller (32), the first pressure roller (31) and the second pressure roller (32) bringing the film close to the packaged item (10), and the first air knife (41) and the second air knife (42) adhering the film to the surface of the packaged item (10).

3. The encapsulation device of claim 2, wherein, The first pressure roller (31) and the second pressure roller (32) are symmetrically arranged; and / or The first air knife (41) and the second air knife (42) are arranged symmetrically.

4. The encapsulation device of claim 1, wherein, The angle and distance between the air nozzle forming the air knife and the packaged item (10) are adjustable, and the air speed of the air knife is adjustable.

5. The encapsulation device of claim 2, wherein, The first pressure roller (31) is provided with a heating element for heating the film; and / or The second pressure roller (32) is provided with a heating element for heating the film.

6. The coating device according to claim 2, characterized in that, The coating device further includes a feeding roller (1) disposed on the side of the first pressure roller (31) away from the second pressure roller (32), the feeding roller (1) being capable of storing the film and for feeding the film to the first pressure roller (31); and / or The coating device further includes a storage roller (5) disposed on the side of the second pressure roller (32) away from the first pressure roller (31), the film portion being wound around the storage roller (5), the storage roller (5) being used to convey the film to the second pressure roller (32).

7. The encapsulated device of claim 1, wherein, The wrapping device further includes a drive mechanism, which includes a linear drive and a first clamping member. The first clamping member is disposed at the output end of the linear drive and is used to clamp the packaged item (10). The linear drive is used to drive the packaged item (10) to move from the second side of the first pressure roller (31) to the first side.

8. The encapsulated device of claim 6, wherein, The wrapping device further includes a cutting mechanism for cutting the film after the wrapping of the item to be packaged (10) is completed in one operation.

9. The encapsulated device of claim 8, wherein, The coating device further includes a stretching mechanism, which includes a driving member and a second clamping member. The second clamping member is disposed at the output end of the driving member and is used to clamp the free end of the film. The driving member drives the second clamping member to carry the film to the storage roller (5) so that the storage roller (5) can wind up the film.

10. The encapsulated device of claim 6, wherein, The coating device further includes a guiding assembly, which includes an auxiliary roller (2) disposed between the feed roller (1) and the first pressure roller (31) for guiding the film.

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