Coating mechanism and battery production line

Abstract

The application provides a film wrapping mechanism and a battery production line. The film wrapping mechanism comprises a battery cell placing table and two film wrapping assemblies. The film wrapping assembly comprises a support plate, a horizontal moving device and a lifting device. The support plate comprises a plate body and a pressing roller. Under the action of the lifting device and the horizontal moving device, the pressing roller and the plate body press the Mylar film on the battery cell along the outer surface of the battery cell, so that the creases of the Mylar film completely match the edges of the battery cell, and the Mylar film completely adheres to the outer surface of the battery cell, thereby ensuring the accuracy and consistency of the Mylar film wrapping, and further ensuring the stability of the subsequent hot melt welding. In addition, the film wrapping mechanism has the advantages of simple and compact structure, convenient use, more convenient operation, shortened operation time and reduced operation strength of workers. The rolling friction exists between the pressing roller and the Mylar film, and the friction force between the pressing roller and the Mylar film is small, thereby reducing the probability of the Mylar film being scratched in the film adhering process, and further reducing the probability of the Mylar film failure.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery production, in particular to a film wrapping mechanism and a battery production line. BACKGROUND

[0002] Mylar film is a thin film made of tough polyester macromolecules, and the Mylar film has very good surface flatness, transparency and mechanical flexibility; and is widely used in the fields of packaging, printing and flexible electronics. Therefore, wrapping the battery cell with the Mylar film greatly increases the insulation performance and strength of the battery cell, and reliably seals and protects the battery cell; in the process of wrapping the battery cell with the Mylar film, the Mylar film needs to be tightly wrapped on the outer surface of the battery cell, and how to automatically and high-quality realize the pasting of the Mylar film on the outer surface of the battery is a problem to be solved. SUMMARY

[0003] The application aims to provide a film wrapping mechanism and a battery production line which are simple in structure, convenient to operate and good in film wrapping effect.

[0004] To achieve the above-mentioned purpose, the first aspect of the application provides a film wrapping mechanism, which comprises: a battery cell placing table, the battery cell placing table comprises a top wall, a bottom wall and a side wall between the top wall and the bottom wall, the side wall comprises two oppositely arranged first surfaces and two oppositely arranged second surfaces, and the top wall is configured to support a battery cell and a Mylar film; and two film wrapping assemblies, the two film wrapping assemblies are respectively arranged on one side of the first surface of the battery cell placing table; the film wrapping assembly comprises: a support plate, the support plate comprises a plate body and a pressure roller, the plate body comprises a top surface, a bottom surface and a side surface between the top surface and the bottom surface, the pressure roller is arranged on the side surface and can rotate relative to the plate body, the pressure roller is pressed against the first surface, and the top surface of the plate body is configured to support the Mylar film; a horizontal moving device, the horizontal moving device is connected with the support plate and can drive the support plate to move in a direction parallel to the top wall; and a lifting device, the lifting device is connected with the horizontal moving device, and the lifting device can drive the horizontal moving device to move in a direction perpendicular to the top wall, so that the support plate moves in a direction perpendicular to the top wall.

[0005] Compared with the prior art, the above-mentioned technical solution has the following advantages:

[0006] Under the action of the lifting device and the horizontal moving device, the compression roller and the plate body press the Mylar film on the battery cell along the outer surface of the battery cell, so that the creases of the Mylar film completely match the edges of the battery cell, and thus the Mylar film is completely attached to the outer surface of the battery cell, that is, the accuracy and consistency of the Mylar film wrapping are ensured, and the stability of the subsequent hot melt welding is ensured. In addition, the film wrapping mechanism has the advantages of simple and compact structure, convenient use, more convenient operation, shortened operation time, and facilitation of reducing the operation strength of workers. The rolling friction exists between the compression roller and the Mylar film, and the friction between the compression roller and the Mylar film is small, so that the probability of the Mylar film being scratched in the film attaching process is reduced, the use reliability of the Mylar film is ensured, and the probability of the Mylar film failure is reduced.

[0007] The embodiment of the second aspect of the application provides a battery production line comprising the film wrapping mechanism.

[0008] Compared with the prior art, the technical scheme has the following advantages:

[0009] The battery production line has the advantages of simple and compact structure, convenient use, more convenient operation, shortened operation time, and facilitation of reducing the operation strength of workers. In addition, the precision of the battery cell wrapped with the Mylar film is high, so that the probability of the Mylar film being scratched in the film attaching process is reduced, the use reliability of the Mylar film is ensured, and the probability of the Mylar film failure is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0010] The following drawings are only intended to schematically illustrate and explain the application, and do not limit the scope of the application. Among them:

[0011] Figure 1 is a structural schematic view of the first embodiment of the film wrapping mechanism described in the application;

[0012] Figure 2 is Figure 1 is a structural schematic view of the film wrapping mechanism shown in the first working state;

[0013] Figure 3 is Figure 1 is a structural schematic view of the film wrapping mechanism shown in the second working state;

[0014] Figure 4 is a structural schematic view of the second embodiment of the film wrapping mechanism described in the application;

[0015] Figure 5 is a structural schematic view of the third embodiment of the film wrapping mechanism described in the application;

[0016] Figure 6 is a structural schematic view of the fourth embodiment of the film wrapping mechanism described in the application;

[0017] Figure 7is a structural schematic view of a fifth embodiment of the enveloping mechanism described in the present application;

[0018] Figure 8 is Figure 7 is a structural schematic view of the enveloping mechanism shown in another state;

[0019] Figure 9 is a structural schematic view of a sixth embodiment of the enveloping mechanism described in the present application.

[0020] BRIEF DESCRIPTION OF DRAWINGS

[0021] 10, cell placement table; 11, top wall; 12, bottom wall; 13, side wall; 131, first face; 132, second face; 20, enveloping assembly; 21, support plate; 211, plate body; 2111, top face; 2112, bottom face; 2113, side face; 212, compression roller; 213, connecting frame; 214, adsorption hole; 22, horizontal moving device; 23, lifting device; 30, scraper; 40, adsorption device; 50, compression device; 51, compression block; 52, rotating frame; 53, moving frame; 60, cell; 70, Mylar film. DETAILED DESCRIPTION

[0022] The present application will be further described by the following drawings and examples. The features and advantages of the present application will become more apparent from the detailed description, from the claims as well as from the drawings.

[0023] The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. Unless specifically stated otherwise, the drawings are not drawn to scale and the disclosure is not limited to the specific embodiments illustrated in the drawings.

[0024] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as there is no conflict. The following discussion provides a plurality of embodiments of the present application. Although each embodiment represents a single combination of the application, different embodiments of the present application can be replaced or combined, and therefore the present application can also be considered to include all possible combinations of the same and / or different embodiments described. Thus, if one embodiment includes A, B, and C, and another embodiment includes a combination of B and D, the present application should also be considered to include embodiments containing one or more of all other possible combinations of A, B, C, and D, even if the embodiment is not explicitly described in the following content. In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0025] As Figures 1 to 3As shown, the package film mechanism provided by the embodiment of the first aspect of the present application comprises an electric core placement table 10 and two package film assemblies 20.

[0026] As shown, Figure 1 The electric core placement table 10 comprises a top wall 11, a bottom wall 12 and a side wall 13 between the top wall 11 and the bottom wall 12, the side wall 13 comprises two oppositely arranged first faces 131 and two oppositely arranged second faces 132, and the top wall 11 is configured to support the electric core 60 and the Mylar film 70.

[0027] As shown, Figure 1 The two package film assemblies 20 are arranged on one side of the first face 131 of the electric core placement table 10 respectively.

[0028] As shown, Figure 1 The package film assembly 20 comprises a support plate 21, a horizontal moving device 22 and a lifting device 23.

[0029] As shown, Figure 1 The support plate 21 comprises a plate body 211 and a compression roller 212, the plate body 211 comprises a top face 2111, a bottom face 2112 and a side face 2113 between the top face 2111 and the bottom face 2112, the compression roller 212 is arranged on the side face 2113 and can rotate relative to the plate body 211, the compression roller 212 is pressed against the first face 131, and the top face 2111 of the plate body 211 is configured to support the Mylar film 70.

[0030] As shown, Figure 1 The horizontal moving device 22 is connected with the support plate 21 and can drive the support plate 21 to move in a direction parallel to the top wall 11.

[0031] As shown, Figure 1 The lifting device 23 is connected with the horizontal moving device 22, and the lifting device 23 can drive the horizontal moving device 22 to move in a direction perpendicular to the top wall 11, so that the support plate 21 moves in a direction perpendicular to the top wall 11.

[0032] As shown, Figure 1 First, the top face 2111 of the plate body 211 is leveled with the top wall 11 of the electric core placement table 10 to form a support face, then the Mylar film 70 is placed on the support face, and then the electric core 60 is placed on the top wall 11, as shown, Figure 2 Then, the lifting device 23 of the two package film assemblies 20 is started, so that the lifting device 23 drives the plate body 211 to rise, at this time, the compression roller 212 presses the Mylar film 70 to move along the side wall 13 of the electric core placement table 10 to the side surface of the electric core 60, so that the Mylar film 70 is attached to the side surface of the electric core 60, when the side surface of the electric core 60 is covered with the Mylar film 70, the lifting device 23 stops working, at this time, as shown, Figure 3As shown, the horizontal moving device 22 is started to move the support plate 21 to press the Mylar film 70 to the middle of the battery cell 60, so that the Mylar film 70 is attached to the upper surface of the battery cell 60. Under the action of the lifting device 23 and the horizontal moving device 22, the pressing roller 212 and the plate body 211 press the Mylar film 70 to the battery cell 60 along the outer surface of the battery cell 60, so that the creases of the Mylar film 70 completely match the edges of the battery cell 60, and the Mylar film 70 is completely attached to the outer surface of the battery cell 60, thereby ensuring the accuracy and consistency of the Mylar film 70 wrapping, and further ensuring the stability of the subsequent hot melt welding.

[0033] In addition, the film wrapping mechanism has the advantages of simple and compact structure, convenient use, convenient operation, shortened operation time, and reduced labor intensity of workers.

[0034] In addition, the rolling friction exists between the pressing roller 212 and the Mylar film 70, and the friction between the pressing roller 212 and the Mylar film 70 is small, thereby reducing the probability of the Mylar film 70 being scratched during the film attaching process, ensuring the use reliability of the Mylar film 70, and further reducing the probability of the Mylar film 70 failure.

[0035] As shown in the drawings, Figure 4 In one embodiment of the present application, the support plate 21 further comprises two connecting frames 213.

[0036] The two connecting frames 213 are symmetrically connected to the side surface 2113 and can move relative to the plate body 211 in a direction perpendicular to the top surface 2111, and the two ends of the pressing roller 212 are rotatably connected to the two connecting frames 213.

[0037] When the horizontal moving device 22 moves the support plate 21, the connecting frame 213 rotates relative to the plate body 211, so that the pressing roller 212 protrudes from the bottom surface 2112 of the plate body 211, thereby enabling the pressing roller 212 to press the Mylar film 70 to the middle of the battery cell 60. Since the pressing roller 212 applies pressure to the Mylar film 70, the Mylar film 70 is better attached to the upper surface of the battery cell 60, i.e., the Mylar film 70 is completely attached to the outer surface of the battery cell 60 under the action of the pressing roller 212, thereby ensuring the accuracy and consistency of the Mylar film 70 wrapping, and further ensuring the stability of the subsequent hot melt welding.

[0038] As shown in the drawings, Figure 5 In one embodiment of the present application, the pressing roller 212 protrudes from the bottom surface 2112 in a direction perpendicular to the bottom surface 2112.

[0039] When the horizontal moving device 22 drives the support plate 21 to move, the pressing roller 212 of the convex bottom surface 2112 can press the Mylar film 70 to move to the middle part of the battery cell 60. Since the pressing roller 212 applies pressure to the Mylar film 70, the Mylar film 70 can be better attached to the upper surface of the battery cell 60, that is, the Mylar film 70 can be completely attached to the outer surface of the battery cell 60 under the action of the pressing roller 212, thereby ensuring the accuracy and consistency of the Mylar film 70 wrapping, and further ensuring the stability of the subsequent hot melt welding.

[0040] In an embodiment of the present application, the pressing roller 212 comprises a roller body and an elastic layer wrapped on the outer surface of the roller body.

[0041] When the pressing roller 212 presses the Mylar film 70 against the battery cell 60, the elastic layer elastically deforms, so that the Mylar film 70 and the pressing roller 212 are in flexible contact, thereby reducing the probability of the Mylar film 70 being scratched during the film attaching process, ensuring the use reliability of the Mylar film 70, and further reducing the probability of the Mylar film 70 failing.

[0042] As shown in Figure 6 In an embodiment of the present application, the bottom surface 2112 is provided with a scraper 30, and the scraper 30 can abut against the Mylar film 70.

[0043] When the horizontal moving device 22 drives the support plate 21 to move, the scraper 30 presses the Mylar film 70 to move to the middle part of the battery cell 60. Since the scraper 30 applies pressure to the Mylar film 70, the Mylar film 70 can be better attached to the upper surface of the battery cell 60, that is, the Mylar film 70 can be completely attached to the outer surface of the battery cell 60 under the action of the scraper 30, thereby ensuring the accuracy and consistency of the Mylar film 70 wrapping, and further ensuring the stability of the subsequent hot melt welding.

[0044] As shown in Figures 7 to 9 In an embodiment of the present application, the film wrapping mechanism further comprises two pressing devices 50.

[0045] The two pressing devices 50 are respectively arranged on one side of the second surface 132 of the battery cell placing table 10, and the pressing device 50 can move relative to the battery cell placing table 10. The pressing device 50 is configured to press the Mylar film 70 against the battery cell 60.

[0046] After the two film wrapping assemblies 20 completely wrap the Mylar film 70 on the battery cell 60, the two film wrapping assemblies 20 are reset, the pressing device 50 presses the Mylar film 70, and then the adhesive tape is attached to the Mylar film 70, so that the two ends of the Mylar film 70 are attached together, thereby fixing the Mylar film 70 on the battery cell 60. The arrangement of the pressing device 50 can prevent the Mylar film 70 from being raised during the attachment of the adhesive tape, avoid affecting the subsequent attachment of the adhesive tape, and thereby ensure the qualified rate of the adhesive tape attaching process.

[0047] As Figures 7 to 9 shown in the drawings, in one embodiment of the present application, the pressing device 50 comprises a pressing block 51, a rotating frame 52 and a moving frame 53.

[0048] The rotating frame 52 is connected with the pressing block 51 and can drive the pressing block 51 to rotate relative to the cell placing table 10.

[0049] The moving frame 53 is connected with the rotating frame 52 and can drive the pressing block 51 to move along a direction perpendicular to the top wall 11 through the rotating frame 52.

[0050] An elastic layer is arranged on the outer surface of the pressing block 51. The flexible contact between the Mylar film 70 and the pressing block 51 can avoid the Mylar film 70 being scratched by the pressing block 51, ensure the use reliability of the Mylar film 70, and further reduce the failure probability of the Mylar film 70.

[0051] When the two film wrapping assemblies 20 completely wrap the Mylar film 70 on the cell 60, the two film wrapping assemblies 20 are reset, the rotating frame 52 rotates relative to the cell placing table 10, so that the pressing block 51 is located above the cell 60, and then the moving frame 53 drives the pressing block 51 to move towards the cell 60, so that the pressing block 51 presses on the Mylar film 70. The above-mentioned pressing device 50 has simple structure and convenient operation, and can effectively prevent the Mylar film 70 from being buckled.

[0052] As Figure 9 shown in the drawings, in one embodiment of the present application, the film wrapping mechanism further comprises a suction device 40.

[0053] The top surface 2111 of the support plate 21 is provided with a suction hole 214, and the suction device 40 communicates with the suction hole 214.

[0054] After the Mylar film 70 is placed on the top surface 2111 of the support plate 21, the Mylar film 70 covers the suction hole 214, the suction device 40 is started to suck the air in the suction hole 214, so that a negative pressure is formed in the suction hole 214, and the Mylar film 70 is adsorbed on the top surface 2111. When the film wrapping operation is needed, the suction device 40 stops working, so that the Mylar film 70 can smoothly move on the plate body 211. The arrangement of the suction device 40 avoids the Mylar film 70 from being deviated during the placement of the cell 60, so that the Mylar film 70 is not tightly matched with the battery, thereby ensuring that the Mylar film 70 can completely conform to the outer surface of the cell 60, ensuring the accuracy and consistency of the Mylar film 70 wrapping, and further ensuring the stability of the subsequent hot melting welding.

[0055] As Figure 9As shown, in one embodiment of this application, the length of the pressure roller 212 is equal to the length of the support plate 21 in the direction perpendicular to the second surface 132. Alternatively, the length of the pressure roller 212 is greater than the length of the support plate 21 in the direction perpendicular to the second surface 132.

[0056] The aforementioned limitation on the length of the pressure roller 212, in the direction perpendicular to the second surface 132, ensures that the length of the pressure roller 212 is not less than the length of the battery cell 60. Thus, under the action of the pressure roller 212, the Mylar film 70 can be completely bonded to the outer surface of the battery cell 60, thereby ensuring the accuracy and consistency of the Mylar film 70 wrapping, and thus ensuring the stability of the subsequent hot melt welding.

[0057] The battery production line provided in the second aspect of this application includes the aforementioned coating mechanism.

[0058] The battery production line provided in this application has a simple and compact structure, is easy to use and operate, shortens operation time, and helps reduce the workload of workers. In addition, the high precision of the Mylar film on the cell pack reduces the probability of the Mylar film being scratched during the film application process, ensuring the reliability of the Mylar film and thus reducing the probability of Mylar film failure.

[0059] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship in the working state of this application, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. The term "multiple" refers to two or more, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0061] The present application has been described above with reference to preferred embodiments; however, these embodiments are merely exemplary and illustrative. Various substitutions and modifications can be made to the present application based on these embodiments, all of which fall within the protection scope of the present application.

Claims

1. An encapsulation mechanism, characterized by, The film coating mechanism comprises: an electric core placing table, which comprises a top wall, a bottom wall and a side wall between the top wall and the bottom wall, the side wall comprises two oppositely arranged first faces and two oppositely arranged second faces, and the top wall is configured to support an electric core and a Mylar film; and two film coating assemblies, which are arranged on one side of the first face of the electric core placing table respectively; the film coating assembly comprises a support plate, which comprises a plate body and a pressing roller, the plate body comprises a top face, a bottom face and a side face between the top face and the bottom face, the pressing roller is arranged on the side face and can rotate relative to the plate body, the pressing roller is pressed against the first face, and the top face of the plate body is configured to support the Mylar film; a horizontal moving device, which is connected with the support plate and can drive the support plate to move in a direction parallel to the top wall; and a lifting device, which is connected with the horizontal moving device and can drive the horizontal moving device to move in a direction perpendicular to the top wall, so that the support plate moves in a direction perpendicular to the top wall; a pressing device, which is configured to press the Mylar film against the electric core; the length of the pressing roller is not less than the length of the electric core.

2. The film coating mechanism according to claim 1, wherein in a direction perpendicular to the second face, the length of the pressing roller is equal to the length of the support plate.

3. The film coating mechanism according to claim 1, wherein the support plate further comprises two connecting frames, which are symmetrically connected to the side face and can move in a direction perpendicular to the top face relative to the plate body, and the two ends of the pressing roller are rotatably connected to the two connecting frames respectively.

4. The film coating mechanism according to claim 1, wherein in a direction perpendicular to the bottom face, the pressing roller protrudes from the bottom face.

5. The film coating mechanism according to claim 1, wherein the pressing roller comprises a roller body and an elastic layer wrapped on the outer surface of the roller body.

6. The film coating mechanism according to claim 1, wherein a scraper is arranged on the bottom face and can abut against the Mylar film.

7. The film coating mechanism according to any one of claims 1 to 6, wherein the film coating mechanism further comprises a suction device, and a suction hole is arranged on the top face of the support plate and communicates with the suction device.

8. The film coating mechanism according to any one of claims 1 to 6, wherein two pressing devices are arranged on one side of the second face of the electric core placing table respectively, and the pressing devices can move relative to the electric core placing table.

9. The film coating mechanism according to claim 8, wherein the pressing device comprises a pressing block; a rotating frame, which is connected with the pressing block and can drive the pressing block to rotate relative to the electric core placing table; and a moving frame, which is connected with the rotating frame and can drive the pressing block to move in a direction perpendicular to the top wall through the rotating frame.

10. A battery production line, characterized by, The enveloped mechanism as claimed in any one of claims 1 to 9. The enveloped mechanism as claimed in any one of claims 1 to 9.

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