Film coating device and battery production system

Abstract

The utility model discloses a film coating device and a battery production system. The film wrapping device comprises a rotating mechanism, the rotating mechanism comprises a mounting base, a plurality of transmission roller assemblies and a transmission belt, the transmission roller assemblies are parallel to one another and are arranged at intervals, the transmission roller assemblies are arranged on the mounting base, each transmission roller assembly comprises a transmission roller, the transmission rollers can rotate relative to the mounting base, and the transmission belt is wound around the transmission rollers; the supporting roller assembly is located below the rotating mechanism. Friction force is transmitted to the electrode assembly through the belt, the electrode assembly is made to rotate, due to the fact that the belt is flexible, deformation of the electrode assembly can be reduced by driving the electrode assembly to rotate through the belt, the deformation amount of the electrode assembly in the film wrapping process is reduced, and therefore an insulating film can be attached to the peripheral surface of the electrode assembly more smoothly.

Description

Technical Field

[0001] The present application relates to a battery manufacturing device, and more specifically to a film coating device and a battery production system. Background Art

[0002] The electrode assembly of a battery cell requires wrapping with an insulating film to insulate the electrode assembly from the shell after insertion. During wrapping, a drive roller presses against the electrode assembly, rotating the electrode assembly and wrapping the insulating film around it. Currently, due to the hollow structure of the electrode assembly, excessive downward pressure from the drive roller can cause deformation, leading to wrinkles in the insulating film and compromising the wrapping quality. Utility Model Content

[0003] In view of the above problems, the present application provides a film wrapping device and a battery production system, which can improve the situation where the downward pressure of the electrode assembly is too large during the process of winding the insulating film.

[0004] In a first aspect, the present application provides a membrane encapsulation device, comprising:

[0005] The rotating mechanism includes a mounting seat, a transmission roller assembly, and a transmission belt. The number of the transmission roller assemblies is multiple, and the multiple transmission roller assemblies are arranged parallel to each other and at intervals. The transmission roller assembly is arranged on the mounting seat. The transmission roller assembly includes a transmission roller, and the transmission roller is capable of rotating relative to the mounting seat. The transmission belt is wound around the multiple transmission rollers.

[0006] The support roller assembly is located below the rotating mechanism. The support roller assembly and the rotating mechanism are spaced apart and together define a storage space for accommodating the workpiece to be coated. The support roller assembly and the rotating mechanism can be relatively close to or away from each other so that the transmission belt and the support roller assembly can jointly clamp or release the workpiece to be coated. The axis of the support roller assembly is parallel to the axis of the transmission roller.

[0007] The part to be coated can be an electrode assembly. The friction force is transmitted to the electrode assembly through the belt to make the electrode assembly rotate. Since the belt is flexible, the belt-driven rotation of the electrode assembly can reduce the deformation of the electrode assembly, so as to reduce the deformation of the electrode assembly during the coating process, thereby enabling the insulating film to be more smoothly attached to the outer peripheral surface of the electrode assembly.

[0008] In some embodiments, at least one transmission roller assembly is connected to a mounting seat and its position relative to the mounting seat is adjustable along a first direction to change the tension of the transmission belt. The first direction is perpendicular to the axis of the transmission roller, and the spacing direction between the rotating mechanism and the support roller assembly is the same as or intersects with the first direction.

[0009] Therefore, the position of the transmission roller assembly can be adjusted to change the tension of the transmission belt by the transmission roller assembly, so that when the transmission belt is too tight or too loose, appropriate adjustments can be made to reduce the probability of excessive deformation of the electrode assembly or insufficient friction and slipping, thereby reducing the probability of wrinkles when winding the insulating film and improving the winding quality.

[0010] In some embodiments, the plurality of driving roller assemblies include a driven roller assembly, the driven roller assembly being connected to a mounting base and being adjustable relative to the mounting base along a first direction, the mounting base being provided with a guide structure extending along the first direction, and the driven roller assembly including:

[0011] a rotating shaft, rotatably connected to the driving roller of the driven roller assembly;

[0012] The connecting member fixes the rotating shaft to the guide structure.

[0013] When the connecting member is loosened, the rotating shaft can be moved relative to the guide structure to change the tension of the transmission roller assembly on the transmission belt, thereby adjusting the pressure of the transmission belt on the electrode assembly to reduce the deformation of the electrode assembly during the winding process of the insulating film, thereby making the wound insulating film smoother.

[0014] In some embodiments, the guide structure is a long slot hole, which passes through the mounting seat along the axial direction of the transmission roller. Part of the rotating shaft is arranged in the long slot hole. The connecting member is located on the side of the mounting seat away from the transmission roller assembly, and the connecting member is threadedly connected to the rotating shaft.

[0015] When the connecting member is loosened, the rotating shaft can be moved in the long slot in a first direction to adjust the tension of the transmission belt. After the tension is adjusted to a suitable value, the connecting member is tightened to secure the rotating shaft to the long slot. During the tension adjustment process, the connecting member can remain attached to the rotating shaft, enabling tension adjustment, shortening the time required to secure the rotating shaft and improving work efficiency.

[0016] In some embodiments, the plurality of transmission roller assemblies include an active roller assembly and a driven roller assembly, and the active roller assembly is configured to drive the transmission roller of the driven roller assembly to rotate via a transmission belt.

[0017] By driving the active roller assembly, multiple transmission roller assemblies can be driven to rotate at the same time, so as to drive the transmission belt to drive the electrode assembly to rotate, thereby facilitating the winding of the insulating film.

[0018] In some embodiments, a driven roller assembly is provided on both sides of the active roller assembly along the second direction, and the number of driven roller assemblies on the same side of the active roller assembly along the second direction is multiple, and the multiple driven roller assemblies on the same side of the active roller assembly along the second direction are spaced apart along the first direction, the first direction intersects with the second direction, and the second direction is perpendicular to the axis of the transmission roller.

[0019] By increasing the number of driven roller assemblies, the winding length of the transmission belt can be increased, so that the transmission roller assembly can adjust the tension of the transmission belt in a wider range to meet the needs of electrode assemblies of different sizes, thereby reducing the probability of the wound insulation film being uneven due to excessive deformation of the electrode assembly.

[0020] In some embodiments, the wrap angle between the transmission belt and the transmission roller is a, and the value range of a is 90°-150°.

[0021] When a = 90°, the belt's friction against the rollers is generally sufficient to reduce slippage. However, as a increases, friction also increases, but the belt's bending area also increases, making it more susceptible to fatigue fracture. Therefore, to balance friction and reduce the likelihood of belt fatigue fracture, a is set between 90° and 150°.

[0022] In some embodiments, the value of a ranges from 90° to 120°.

[0023] Therefore, on the basis of meeting the friction force requirements of the transmission belt on the transmission roller, setting a within 120° can further reduce the probability of fatigue fracture of the transmission belt and thus increase the service life of the transmission belt.

[0024] In some embodiments, an outer peripheral surface of the driving roller is provided with an anti-slip structure.

[0025] The anti-slip structure can increase the friction between the transmission belt and the transmission roller to reduce the probability of slipping between the transmission roller and the transmission belt (slipping is likely to cause wrinkles when winding the insulating film), thereby ensuring that the electrode assembly can smoothly wind the insulating film.

[0026] In some embodiments, the anti-slip structure includes a plurality of anti-slip protrusions, and the plurality of anti-slip protrusions are arranged at intervals on the outer peripheral surface of the transmission roller along the circumferential direction of the transmission roller.

[0027] The provision of the anti-slip protrusions can reduce the contact area between the transmission roller and the transmission belt to increase the roughness, thereby increasing the friction between the transmission belt and the transmission roller to reduce the probability of slipping.

[0028] In some embodiments, the support roller assembly comprises:

[0029] support base; and

[0030] The first support roller and the second support roller are respectively rotatably connected to the support seat, and the first support roller and the second support roller are spaced apart along the second direction. The axis of the first support roller, the axis of the second support roller and the axis of the transmission roller are parallel to each other. The first support roller and the second support roller are used to jointly support the workpiece to be coated, and the second direction intersects with the first direction, and the first direction and the second direction are respectively perpendicular to the axis of the transmission roller.

[0031] Thus, the electrode assembly can be placed between the first support roller and the second support roller, so that when the transmission belt drives the electrode assembly to rotate, the electrode assembly can be maintained in a predetermined position by three-point support, so as to facilitate the winding of the insulating film.

[0032] In a second aspect, the present application provides a battery production system, comprising the coating device of the first aspect, the coating device being used to wrap an insulating film around the outer peripheral surface of the electrode assembly.

[0033] Since the battery production system includes all the technical features of the coating device of the first aspect mentioned above, the effects are the same as those mentioned above and will not be described in detail here.

[0034] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0036] Figure 1 This is a partial axonometric diagram of a membrane encapsulation device according to an embodiment of the present application;

[0037] Figure 2 This is an axonometric diagram of a rotating mechanism and a supporting roller assembly clamping a workpiece to be coated in a coating device according to one embodiment of the present application;

[0038] Figure 3 This is an axonometric diagram of a rotating mechanism in a film coating device according to one embodiment of the present application;

[0039] Figure 4 This is a side view of a rotating mechanism in a film coating device according to an embodiment of the present application;

[0040] Figure 5 This is a front view of a rotating mechanism in a film coating device according to one embodiment of the present application;

[0041] Figure 6 This is a side view of a coating device according to an embodiment of the present application.

[0042] The accompanying drawings in the specific implementation manner are as follows:

[0043] 100. Encapsulation device;

[0044] 10. Rotating mechanism; 11. Mounting seat; 111. Guide structure; 12. Transmission roller assembly; 121. Driven roller assembly; 1211. Rotating shaft; 1212. Connecting member; 1213. Transmission roller; 12131. Anti-slip structure; 122. Active roller assembly; 1221. Transmission shaft; 13. Transmission belt; 20. Support roller assembly; 21. First support roller; 22. Second support roller; 23. Support seat; 30. Insulation film clamping mechanism; 40. Feeding mechanism; 41. Feeding roller; 42. Guide roller; 50. Cutting mechanism; 51. Cutter;

[0045] 200, parts to be coated;

[0046] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0047] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0049] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0050] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0051] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0052] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0053] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0054] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0055] The coating device is a device used to wrap an insulating film around the electrode assembly of a battery cell. First, the incoming electrode assembly is lifted to a predetermined position by a support roller, so that the electrode assembly abuts the drive roller of the coating device. The feed roller of the coating device is wrapped with an insulating film, which is then passed to the inlet side of the electrode assembly by a guide roller. The insulating film is then clamped to the outlet side by a clamping component, and the insulating film on the inlet side is cut. Finally, the drive roller above the electrode assembly rotates the electrode assembly, causing the insulating film to wrap around the electrode assembly, thereby achieving insulation between the electrode assembly and the shell after insertion. The problem is that because the electrode assembly is a hollow structure, when the drive roller is used to press the electrode assembly, it is easy to generate excessive downward pressure, causing the electrode assembly to be easily deformed. Wrinkles are easily formed when the insulating film is wrapped, affecting the winding quality of the insulating film.

[0056] In view of this, the present application provides a transmission device, and the part to be coated can be an electrode assembly. The friction force is transmitted to the electrode assembly through a belt to rotate the electrode assembly. Since the belt is flexible, the belt drives the electrode assembly to rotate, which can reduce the deformation of the electrode assembly, so as to reduce the deformation of the electrode assembly during the coating process, thereby enabling the insulating film to be more smoothly attached to the outer peripheral surface of the electrode assembly.

[0057] The transmission device of the present application can be used for, but not limited to, driving the rotation of the electrode assembly, and can also be used to drive the rotation of a cylindrical shell, such as the shell of a cylindrical battery cell, to achieve winding of the insulating film of the shell.

[0058] For the convenience of explanation, please refer to the following examples. Figures 1-6 , a coating device 100 according to some embodiments of the present application is used as an example for description.

[0059] The coating device 100 includes a rotating mechanism 10 and a support roller assembly 20. The rotating mechanism 10 includes a mounting seat 11, a transmission roller assembly 12, and a transmission belt 13. There are multiple transmission roller assemblies 12, which are parallel to each other and spaced apart. The transmission roller assembly 12 is mounted on the mounting seat 11 and includes transmission rollers 1213 that are rotatable relative to the mounting seat 11. The transmission belt 13 is wound around the multiple transmission rollers 1213. The support roller assembly 20 is located below the rotating mechanism 10 and spaced apart from the rotating mechanism 10. Together, they define a space for accommodating the object 200 to be coated. The support roller assembly 20 and the rotating mechanism 10 can move closer or further apart so that the transmission belt 13 and the support roller assembly 20 can jointly clamp or release the object 200 to be coated. The axis of the support roller assembly 20 is parallel to the axis of the transmission roller 1213.

[0060] The object to be coated 200 may be an electrode assembly of a battery cell, or may be, but is not limited to, a cylindrical shell.

[0061] The support roller assembly 20 and the rotating mechanism 10 can move closer to or farther away from each other, which can be achieved by driving one of the support roller assembly 20 or the rotating mechanism 10 via a driving mechanism. For example, the support roller assembly 20 can be driven by a linear driving component such as a cylinder or an electric push rod, so that the support roller assembly 20 and the rotating mechanism 10 can move relative to or away from each other.

[0062] The part to be coated 200 can be an electrode assembly. At least one transmission roller assembly 12 is connected to the mounting seat 11 in an adjustable manner along the first direction X, which can change the tension of the transmission belt 13. When the transmission belt 13 abuts against the electrode assembly, the position of the transmission roller assembly 12 relative to the mounting seat 11 can be adjusted to reduce the pressure of the transmission belt 13 on the electrode assembly, so as to reduce the deformation of the electrode assembly during the coating process, thereby enabling the insulating film to be more evenly attached to the outer peripheral surface of the electrode assembly.

[0063] In some embodiments, at least one transmission roller assembly 12 is connected to the mounting base 11 and its position relative to the mounting base 11 is adjustable along a first direction X to change the tension of the transmission belt 13. The first direction X is perpendicular to the axis of the transmission roller 1213, and the spacing direction between the rotating mechanism 10 and the support roller assembly 20 is the same as or intersects with the first direction X.

[0064] The first direction X may be any direction perpendicular to the axis of the transmission roller 1213 , specifically a vertical direction, or a direction intersecting the vertical direction.

[0065] The number of transmission roller assemblies 12 can be more than two. For example, there can be two transmission roller assemblies 12. Without considering installation space, the first direction X is the same as the spacing direction between the two transmission roller assemblies 12. One transmission roller assembly 12 is adjustable relative to the mounting base 11 along the first direction X. The other transmission roller assembly 12 is rotatably connected to the mounting base 11. By driving the other transmission roller assembly 12, which can be driven by a motor or manually, the two transmission roller assemblies 12 are arranged horizontally so that one side of the transmission belt 13 can press against the top of the electrode assembly. When the transmission belt 13 rotates, it can drive the electrode assembly to rotate, thereby achieving winding of the insulating film. The number of transmission roller assemblies 12 can be three. On the same cross-section of the three transmission roller assemblies 12, the line connecting the centers of the three transmission roller assemblies 12 can form an equilateral triangle. The first direction X can be vertical, so that the transmission roller assembly 12 can change the tension of the transmission belt 13 through vertical adjustment. In other examples, the line connecting the centers of the three drive roller assemblies 12 can be arranged to form an isosceles triangle, an acute triangle, or an obtuse triangle, etc., and the specific design can be based on actual usage requirements. Among the three drive roller assemblies 12, one drive roller assembly 12 can be configured to be driven by a motor or manually, and at least one of the other two drive roller assemblies 12 can be adjusted relative to the mounting base 11 along the first direction X. When the number of drive roller assemblies 12 is four or more, various arrangements can be adopted, and the line connecting the centers of the drive roller assemblies 12 can be arranged in a polygonal form. The specific design can be based on actual needs and is not further described here. Alternatively, all drive roller assemblies 12 can be configured to be adjustable relative to the mounting base 11 along the first direction X. The support roller assembly 20 can be configured to be driven by a motor or manually to achieve rotation of the electrode assembly.

[0066] Therefore, the position of the transmission roller assembly 12 can be adjusted to change the tension of the transmission roller assembly 12 on the transmission belt 13, so that when the transmission belt 13 is too tight or too loose, appropriate adjustments can be made to reduce the probability of excessive deformation of the electrode assembly or insufficient friction and slipping, thereby reducing the probability of wrinkles when winding the insulating film and improving the winding quality.

[0067] In some embodiments, please refer to Figure 1-Figure 3 The plurality of driving roller assemblies 12 include a driven roller assembly 121. The driven roller assembly 121 is connected to the mounting base 11 and is adjustable relative to the mounting base 11 along a first direction X. The mounting base 11 is provided with a guide structure 111 extending along the first direction X. The driven roller assembly 121 includes a rotating shaft 1211 and a connecting member 1212. The rotating shaft 1211 is rotatably connected to a driving roller 1213 of the driven roller assembly 121. The connecting member 1212 secures the rotating shaft 1211 to the guide structure 111.

[0068] The guide member can be one piece or multiple pieces.

[0069] The guide structure 111 can be a slotted hole or a guide rail. As an example, the connecting member 1212 includes a slider and a fastener. The slider is connected to the end of the rotating shaft 1211 by screws or welding, the slider is slidably connected to the guide rail, and the fastener is threadedly connected to the slider. By screwing the fastener, the end of the fastener can be brought into contact with and separated from the guide rail.

[0070] When the connecting member 1212 is loosened, the rotating shaft 1211 can be moved relative to the guide structure 111 to change the tension of the transmission roller assembly 12 on the transmission belt 13, thereby adjusting the pressure of the transmission belt 13 on the electrode assembly to reduce the deformation of the electrode assembly during the winding process of the insulating film, thereby making the wound insulating film smoother.

[0071] In some embodiments, please refer to Figure 3 and Figure 4 The guide structure 111 is a long slot hole, which passes through the mounting seat 11 along the axial direction of the transmission roller 1213. Part of the rotating shaft 1211 is arranged in the long slot hole. The connecting member 1212 is located on the side of the mounting seat 11 away from the transmission roller assembly 12, and the connecting member 1212 is threadedly connected to the rotating shaft 1211.

[0072] The end of the rotating shaft 1211 may or may not extend from the long slot. As an example, the end of the rotating shaft 1211 extends from the long slot, and the connecting member 1212 may be a nut or a nut and a washer combination. The nut is threadedly connected to the end of the rotating shaft 1211. As an example, the end of the rotating shaft 1211 may or may not extend from the long slot. The rotating shaft 1211 is provided with a shoulder that abuts against the mounting seat 11, and the end of the rotating shaft 1211 is provided with a threaded hole. The connecting member 1212 may be a screw or a screw and a washer assembly, and the screw is threadedly connected to the threaded hole.

[0073] When the connecting member 1212 is loosened, the rotating shaft 1211 can be moved within the elongated slot in the first direction X to adjust the tension of the transmission belt 13. After the tension is adjusted to an appropriate level, the rotating shaft 1211 is fixed to the elongated slot by tightening the connecting member 1212. During the tension adjustment process, the connecting member 1212 can remain attached to the rotating shaft 1211, enabling tension adjustment. This shortens the time it takes to secure the rotating shaft 1211 and improves work efficiency.

[0074] In some embodiments, please refer to Figure 1-Figure 3 The plurality of transmission roller assemblies 12 include an active roller assembly 122 and a driven roller assembly 121 . The active roller assembly 122 is configured to drive the transmission roller 1213 of the driven roller assembly 121 to rotate through the transmission belt 13 .

[0075] As an example, the active roller assembly 122 includes a transmission shaft 1221, and the transmission roller 1213 in the active roller assembly 122 is connected to the transmission shaft 1221 in a transmission manner. The transmission shaft 1221 is rotatably connected to the mounting base 11. The transmission shaft 1221 can be directly driven by a motor, or can be connected to the motor drive through a transmission mechanism, for example, a pulley transmission mechanism, a gear transmission mechanism or a chain transmission mechanism is connected to the motor drive, and can also be connected to the motor drive through a reducer to realize the rotation of the transmission roller 1213 of the active roller assembly 122.

[0076] By driving the active roller assembly 122, multiple transmission roller assemblies 12 can be driven to rotate at the same time, so as to drive the transmission belt 13 to drive the electrode assembly to rotate, so as to facilitate the winding of the insulating film.

[0077] In some embodiments, please refer to Figure 1-Figure 3 A driven roller assembly 121 is provided on both sides of the active roller assembly 122 along the second direction Y. There are multiple driven roller assemblies 121 on the same side of the active roller assembly 122 along the second direction Y. The multiple driven roller assemblies 121 on the same side of the active roller assembly 122 along the second direction Y are arranged at intervals along the first direction X. The first direction X intersects with the second direction Y, and the second direction Y is perpendicular to the axis of the transmission roller 1213.

[0078] As an example, the number of the driven roller assemblies 121 is four, and the four driven roller assemblies 121 are arranged in a rectangular array.

[0079] By increasing the number of driven roller assemblies 121, the winding length of the transmission belt 13 can be increased, so that the transmission roller assembly 12 has a larger tension adjustment range for the transmission belt 13 to meet the needs of electrode assemblies of different sizes, thereby reducing the probability of the wound insulation film being uneven due to excessive deformation of the electrode assembly.

[0080] In some embodiments, please refer to Figure 5The wrap angle between the transmission belt 13 and the transmission roller 1213 is a, and the value range of a is 90°-150°.

[0081] The wrap angle refers to the central angle of the contact arc between the transmission belt 13 and the transmission roller 1213.

[0082] When a = 90°, the friction between the transmission belt 13 and the transmission roller 1213 can be basically met, thus reducing the probability of slippage. As a increases, the friction also increases, but the bending area of ​​the transmission belt 13 also increases, which can easily cause fatigue fracture of the transmission belt 13. Therefore, to balance friction and reduce the probability of fatigue fracture of the transmission belt 13, a is set between 90° and 150°.

[0083] In some embodiments, please refer to Figure 5 , the value range of a is 90°-120°.

[0084] Therefore, on the basis of satisfying the friction force requirement of the transmission belt 13 on the transmission roller 1213 , setting a within 120° can further reduce the probability of fatigue fracture of the transmission belt 13 and thus increase the service life of the transmission belt 13 .

[0085] In some embodiments, please refer to Figure 3 The outer surface of the transmission roller 1213 is provided with an anti-slip structure 12131.

[0086] The anti-slip structure 12131 can be a raised or toothed structure. For example, the outer circumferential surface of the driving roller 1213 can be made into a concave-convex structure by embossing. Alternatively, the outer circumferential surface of the driving roller 1213 can be made into a strip-shaped raised structure extending along the circumference of the driving roller 1213, with multiple strip-shaped raised structures spaced apart along the circumference of the driving roller 1213.

[0087] The anti-slip structure 12131 can increase the friction between the transmission belt 13 and the transmission roller 1213 to reduce the probability of slipping between the transmission roller 1213 and the transmission belt 13 (slipping is likely to cause wrinkles when winding the insulating film), thereby ensuring that the electrode assembly can smoothly wind the insulating film.

[0088] In some embodiments, please refer to Figure 3 The anti-slip structure 12131 includes a plurality of anti-slip protrusions, which are arranged at intervals on the outer peripheral surface of the transmission roller 1213 along the circumferential direction of the transmission roller 1213.

[0089] The provision of the anti-slip protrusions can reduce the contact area between the transmission roller 1213 and the transmission belt 13 to increase the roughness, thereby increasing the friction between the transmission belt 13 and the transmission roller 1213 to reduce the probability of slipping.

[0090] In some embodiments, please refer to Figure 1 The support roller assembly 20 includes a support base 23, a first support roller 21, and a second support roller 22. The first support roller 21 and the second support roller 22 are rotatably connected to the support base 23. The axes of the first support roller 21, the second support roller 22, and the drive roller 1213 are parallel to each other. The first support roller 21 and the second support roller 22 are spaced apart along a second direction Y. The first support roller 21 and the second support roller 22 are configured to jointly support the workpiece 200 to be coated. The second direction Y intersects the first direction X and is perpendicular to the axis of the drive roller 1213.

[0091] The number of the first support roller 21 and the second support roller 22 can be one or more. For example, the length of the first support roller 21 and the length of the second support roller 22 can be set relatively short, and multiple first support rollers 21 and second support rollers 22 can be arranged along the axis of the first support roller 21 to provide stable support for the electrode assembly. Alternatively, the length of the first support roller 21 and the length of the second support roller 22 can be set relatively long, and the number of both the first support roller 21 and the second support roller 22 can be one.

[0092] Thus, the electrode assembly can be placed between the first support roller 21 and the second support roller 22, so that when the transmission belt 13 drives the electrode assembly to rotate, the electrode assembly can be maintained in a predetermined position through three-point support to facilitate the winding of the insulating film.

[0093] For the convenience of description, the following embodiments are described by taking a battery production system according to some embodiments of the present application as an example.

[0094] The battery production system includes the coating device 100 of the above embodiment, and the coating device 100 is used to wrap an insulating film around the outer peripheral surface of the electrode assembly.

[0095] Alternatively, see Figure 6 The coating device 100 further includes an insulating film clamping mechanism 30, a feeding mechanism 40, a cutting mechanism 50, and auxiliary components. After the rotating mechanism 10 and the support roller assembly 20 clamp the electrode assembly, the feeding mechanism 40 includes a feeding roller 41 and a guide roller 42. The feeding roller 41 is wound with an insulating film. The feeding roller 41 feeds the insulating film to the inlet side of the electrode assembly through the guide roller 42. The insulating film is then pulled to the outlet side of the electrode assembly by the insulating film clamping mechanism 30. The insulating film on the inlet side is cut by the cutter 51 of the cutting mechanism 50, and the insulating film clamping mechanism 30 is released. The auxiliary components are located above the electrode assembly and help press the insulating film onto the surface of the electrode assembly. The transmission belt 13 of the rotating mechanism 10 then drives the electrode assembly to rotate, thereby wrapping the insulating film around the electrode assembly.

[0096] As an example, the cutting mechanism 50 includes a cutting blade that can be driven by a drive component to achieve the cutting function. The clamping mechanism can be a pneumatic clamp. The feeding mechanism 40 includes a feed roller 41 and multiple guide rollers 42. The feed roller 41 is wrapped with an insulating film, and the insulating film is wound around the multiple guide rollers 42.

[0097] In an alternative embodiment of the coating device 100, please refer to Figures 1-6The coating device 100 includes a rotating mechanism 10 and a support roller assembly 20. The rotating mechanism 10 includes a mounting seat 11, a transmission roller assembly 12, and a transmission belt 13. There are multiple transmission roller assemblies 12, which are parallel to each other and spaced apart. The transmission roller assembly 12 is mounted on the mounting seat 11 and includes transmission rollers 1213. The transmission rollers 1213 are rotatable relative to the mounting seat 11. The transmission belt 13 is wound around the multiple transmission rollers 1213. The support roller assembly 20 is located below the rotating mechanism 10. The support roller assembly 20 and the rotating mechanism 10 are spaced apart and together define a storage space for accommodating the object 200 to be coated. The object 200 to be coated is an electrode assembly. The support roller assembly 20 and the rotating mechanism 10 can move closer or farther away so that the transmission belt 13 and the support roller assembly 20 can jointly clamp or release the object 200 to be coated. The axis of the support roller assembly 20 is parallel to the axis of the transmission roller 1213. At least one driving roller assembly 12 is connected to the mounting base 11 and is adjustable relative to the mounting base 11 along a first direction X to vary the tension of the transmission belt 13. The first direction X is perpendicular to the axis of the driving roller 1213. The spacing between the rotating mechanism 10 and the support roller assembly 20 is aligned with or intersects with the first direction X. The mounting base 11 is provided with a guide structure 111 extending along the first direction X. The driven roller assembly 121 includes a rotating shaft 1211 and a connecting member 1212. The rotating shaft 1211 is rotatably connected to the driving roller 1213 of the driven roller assembly 121. The connecting member 1212 secures the rotating shaft 1211 to the guide structure 111. The guide structure 111 is an elongated slotted hole that extends through the mounting base 11 along the axis of the driving roller 1213. A portion of the rotating shaft 1211 is disposed within the slotted hole. The connecting member 1212 is located on the side of the mounting base 11 facing away from the driving roller assembly 12 and is threadedly connected to the rotating shaft 1211. The plurality of drive roller assemblies 12 include a driven roller assembly 121 and a driven roller assembly 122. The driven roller assembly 121 is connected to the mounting base 11 and is adjustable relative to the mounting base 11 along a first direction X. The driving roller assembly 122 is configured to drive the driving roller 1213 of the driven roller assembly 121 to rotate via a transmission belt 13. A driven roller assembly 121 is provided on both sides of the driving roller assembly 122 along a second direction Y. Multiple driven roller assemblies 121 are provided on the same side of the driving roller assembly 122 along the second direction Y. The multiple driven roller assemblies 121 on the same side of the driving roller assembly 122 along the second direction Y are spaced apart along the first direction X. The first direction X intersects the second direction Y, and the second direction Y is perpendicular to the axis of the driving roller 1213. The anti-slip structure 12131 includes a plurality of anti-slip protrusions spaced apart along the circumference of the driving roller 1213. The support roller assembly 20 includes a support base 23, a first support roller 21 and a second support roller 22. The first support roller 21 and the second support roller 22 are rotatably connected to the support base 23 respectively.The axes of the first support roller 21, the second support roller 22, and the transmission roller 1213 are parallel to each other. The first support roller 21 and the second support roller 22 are spaced apart along the second direction Y. The first support roller 21 and the second support roller 22 are used to jointly support the object 200 to be coated. The second direction Y intersects with the first direction X and is perpendicular to the axis of the transmission roller 1213.

[0098] At least one transmission roller assembly 12 is connected to the mounting seat 11 in an adjustable manner along the first direction X, which can change the tension of the transmission belt 13. When the transmission belt 13 abuts the electrode assembly, the position of the transmission roller assembly 12 relative to the mounting seat 11 can be adjusted to reduce the pressure of the transmission belt 13 on the electrode assembly, thereby reducing the deformation of the electrode assembly during the coating process, thereby enabling the insulating film to be more smoothly attached to the outer peripheral surface of the electrode assembly.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A coating device, characterized in that: The coating device comprises: The rotating mechanism includes a mounting seat, a transmission roller assembly, and a transmission belt. The transmission roller assemblies are multiple, and the multiple transmission roller assemblies are arranged parallel to each other and at intervals. The transmission roller assembly is arranged on the mounting seat, and the transmission roller assembly includes a transmission roller, and the transmission roller is capable of rotating relative to the mounting seat. The transmission belt is wound around the multiple transmission rollers. A support roller assembly is provided, the support roller assembly is spaced apart from the rotating mechanism, and together define an accommodating space for accommodating the workpiece to be coated. The support roller assembly and the rotating mechanism can be relatively close to or away from each other so that the transmission belt and the support roller assembly can jointly clamp or release the workpiece to be coated. The axis of the support roller assembly is parallel to the axis of the transmission roller.

2. The coating device according to claim 1, characterized in that At least one of the transmission roller assemblies is connected to the mounting seat and its position relative to the mounting seat is adjustable along a first direction to change the tension of the transmission belt. The first direction is perpendicular to the axis of the transmission roller, and the spacing direction between the rotating mechanism and the support roller assembly is the same as or intersects with the first direction.

3. The coating device according to claim 2, characterized in that The plurality of transmission roller assemblies include a driven roller assembly, the driven roller assembly being connected to the mounting seat and being adjustable relative to the mounting seat along the first direction, the mounting seat being provided with a guide structure extending along the first direction, the driven roller assembly comprising: a rotating shaft, rotatably connected to the driving roller of the driven roller assembly; A connecting member fixes the rotating shaft to the guide structure.

4. The coating device according to claim 3, characterized in that The guide structure is a long slot hole, which passes through the mounting seat along the axial direction of the transmission roller. Part of the rotating shaft is arranged in the long slot hole. The connecting member is located on the side of the mounting seat away from the transmission roller assembly, and the connecting member is threadedly connected to the rotating shaft.

5. The coating device according to claim 2, characterized in that The plurality of transmission roller assemblies include a driving roller assembly and a driven roller assembly. The driving roller assembly drives the transmission roller of the driven roller assembly to rotate through the transmission belt.

6. The coating device according to claim 5, characterized in that The driven roller assemblies are provided on both sides of the active roller assembly along the second direction, and the number of the driven roller assemblies on the same side of the active roller assembly along the second direction is multiple, and the multiple driven roller assemblies on the same side of the active roller assembly along the second direction are spaced apart along the first direction, the first direction intersects the second direction, and the second direction is perpendicular to the axis of the transmission roller.

7. The coating device according to any one of claims 1 to 6, characterized in that: The wrap angle between the transmission belt and the transmission roller is a, and the value range of a is 90°-150°.

8. The coating device according to claim 7, characterized in that The value range of a is 90°-120°.

9. The coating device according to any one of claims 1 to 6, characterized in that: The outer peripheral surface of the transmission roller is provided with an anti-slip structure.

10. The coating device according to claim 9, characterized in that The anti-slip structure includes a plurality of anti-slip protrusions, which are arranged at intervals on the outer peripheral surface of the transmission roller along the circumferential direction of the transmission roller.

11. The coating device according to any one of claims 1 to 6, characterized in that: The support roller assembly comprises: support base; and The first support roller and the second support roller are respectively rotatably connected to the support seat, the first support roller and the second support roller are spaced apart along the second direction, the axis of the first support roller, the axis of the second support roller and the axis of the transmission roller are parallel to each other, the first support roller and the second support roller are used to jointly support the workpiece to be wrapped, the second direction intersects with the first direction, and the first direction and the second direction are respectively perpendicular to the axis of the transmission roller.

12. A battery production system, characterized in that: It comprises a coating device as described in any one of claims 1 to 11, wherein the coating device is used to wrap an insulating film around the outer peripheral surface of the electrode assembly.

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