Roller type film pasting mechanism and film pasting equipment

Abstract

The utility model discloses a roller type film pasting mechanism and film pasting equipment. The roller type film pasting structure is used for pasting a film on a workpiece and comprises a rotary film pasting assembly and a rotary film pasting assembly, the rotary film pasting assembly comprises a first roller with a first film pasting part and a second film pasting part, and the outer surface of the first film pasting part and the outer surface of the second film pasting part are located on the same arc surface; an adsorption assembly is arranged on the arc surface; in the first state, the adsorption assembly generates suction force to position the film on the arc surface and drives the film to rotate to the second state along with the first roller; and in the second state, the adsorption assembly releases the thin film, so that the thin film rotates along with the first roller, and the thin film is attached to the surface of the workpiece through the pressure applied by the first film attaching part and / or the second film attaching part. Due to the fact that the arc-shaped outer surface is arranged on the first rolling wheel on the rolling wheel type film pasting mechanism, gas and / or bubbles can be gradually removed from the position between a film and a workpiece in the film pasting process, and the film pasting quality and the product flatness are improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates generally to the technical field of lithium battery production. More particularly, the present disclosure relates to a roller type film pasting mechanism. Further, the present disclosure also relates to a film pasting apparatus. BACKGROUND

[0002] In the assembly process of lithium batteries, the produced battery cells need to be protected by multiple layers to prevent the battery from being affected by the external environment, such as moisture, dust, etc., thereby prolonging the performance and service life of the battery. Therefore, in recent years, a thin film material has been widely used to cover the battery cells, and this material needs to have excellent insulation performance, mechanical and thermal stability, and such materials include but are not limited to Mylar film, blue film, etc. with high chemical stability, etc., thereby resisting the heat dissipation, short circuit, etc. accidents generated during the operation of the battery, thereby further enhancing the safety performance of the battery.

[0003] In the prior art, Mylar film, blue film material is usually supplied in the form of a roll, which needs to be cut and pasted by a specific device. The flat plate type film pasting machine is one of the commonly used devices, which presses the film onto the surface of the battery by a flat plate. However, due to the design limitation of the flat plate type film pasting machine, the air between the film and the surface of the battery is not easy to be discharged, resulting in the generation of air bubbles.

[0004] Therefore, it is urgent to provide a roller type film pasting mechanism and a film pasting apparatus scheme to ensure that the film and the surface of the battery are air bubble-free, and to improve the efficiency and quality of lithium battery production. SUMMARY

[0005] In order to at least solve the technical problems mentioned above, the present disclosure proposes a roller type film pasting mechanism and a film pasting apparatus which are air bubble-free between the film and the surface of the battery.

[0006] In a first aspect, the present disclosure provides a roller type film pasting mechanism for pasting a film on a workpiece, comprising: a rotating film pasting assembly comprising a first roller rotatable relative to a rotating shaft, the first roller comprising a first film pasting portion and a second film pasting portion, the first film pasting portion and the second film pasting portion being coaxial relative to the rotating shaft and being arranged at intervals along a circumferential direction of the first roller, and the first film pasting portion and the second film pasting portion having the same radial dimension, so that the outer surfaces of the first film pasting portion and the second film pasting portion are on the same circular arc surface; an adsorption assembly arranged on the outer surfaces of the first film pasting portion and the second film pasting portion; in a first state, the adsorption assembly generates suction force to position the film on the outer surfaces of the first film pasting portion and / or the second film pasting portion, and drives the film to rotate with the first roller to a second state; in the second state, the adsorption assembly releases the film, so that the film rotates with the first roller and is pasted on the surface of the workpiece by the pressure applied by the first film pasting portion and / or the second film pasting portion.

[0007] In some embodiments, further comprising a first holding mechanism, wherein the first holding mechanism comprises a holding driving member and a film abutting member, the film abutting member is drivingly connected with the holding driving member and is switched between an initial change state and a terminal change state; wherein the initial change state is that the film abutting member is close to the film and abuts the film against the outer surfaces of the first film pasting portion and / or the second film pasting portion; and in the first state, the film abutting member rotates with the first roller and maintains abutting with the film; the terminal change state is that the film abutting member is away from the film and resets.

[0008] In some embodiments, the first holding mechanism further comprises a holding rotating assembly and a sector rotating portion, wherein the holding rotating assembly limits the movement path of the film abutting member within the arc-shaped hole of the sector rotating portion.

[0009] In some embodiments, the holding driving member and the film abutting member are arranged on the sector rotating portion and rotate synchronously with the sector rotating portion.

[0010] In some embodiments, the roller type film pasting mechanism further comprises a first film supply assembly, the first film supply assembly comprises a first film clamping mechanism, the first film clamping mechanism is arranged at the edge of the first roller in the radial direction;

[0011] The first film clamping mechanism comprises a first clamping portion and a second clamping portion, the second clamping portion tensions and guides the film to the outer surfaces of the first film pasting portion and / or the second film pasting portion, and the first clamping portion can move towards the second clamping portion to clamp the film.

[0012] In some embodiments, the roll-type film pasting mechanism further comprises a cutting part, the cutting part comprises an upper cutting part and a lower cutting part, the upper cutting part is movable relative to the outer surface of the first film pasting part and / or the second film pasting part to cut the film; the lower cutting part is arranged on the outer surface of the first film pasting part and / or the second film pasting part to avoid the movement of the upper cutting part.

[0013] In some embodiments, the roll-type film pasting mechanism further comprises a guiding part, the guiding part comprises a plurality of rotatable guiding rollers, the film is transported to the first film feeding assembly by the guiding rollers of the guiding part providing tension.

[0014] In a second aspect, the present disclosure provides a film pasting device for a battery surface, comprising at least one set of the above-mentioned roll-type film pasting mechanism, wherein the roll-type film pasting mechanism is arranged in mirror image with respect to the battery to be pasted with film.

[0015] In some embodiments, the film pasting device further comprises a position adjustment assembly, the position adjustment assembly adjusts the distance between the rotation axes of the first roll and the second roll in the corresponding set of the roll-type film pasting mechanism by changing the position of the connecting piece in the through hole.

[0016] In some embodiments, the position adjustment assembly further comprises a pressing assembly, the pressing assembly comprises a spring assembly and a floating piece pressed by the spring assembly towards the direction of the surface of the workpiece to be pasted with film, the first roll is rotatably arranged on the floating piece, and the floating piece moves in a first direction to adapt to different sizes of battery cells.

[0017] By the roll-type film pasting mechanism and the film pasting device provided above, the embodiments of the present disclosure can gradually expel gas and / or bubbles from between the film and the workpiece during the film pasting process by rotating the first roll and the second roll arranged on the film pasting assembly and the arc-shaped outer surfaces on the two rolls, thereby improving the quality of film pasting and the flatness of the product. Further, in some embodiments, the film can be cut by the roll-type film pasting mechanism provided with the upper cutting part and the lower cutting part. Such an integrated design not only simplifies the operation process, but also improves the coordination efficiency of film pasting and cutting, making the entire film pasting process simpler and faster. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which several embodiments of the present disclosure are shown by way of example, and wherein like reference numerals refer to like elements throughout. In the drawings:

[0019] Figure 1A structure diagram of the first surface of the installation plate of the roll-type film laminating machine of the present disclosure is shown.

[0020] Figure 2 A structure diagram of another angle of the first surface of the installation plate of the roll-type film laminating machine of the present disclosure is shown.

[0021] Figure 3 A structure diagram of another angle of the second surface of the installation plate of the roll-type film laminating machine of the present disclosure is shown. Figure 2 An enlarged view of A in the middle.

[0022] Figure 4 A structure diagram of the first surface of the installation plate of the roll-type film laminating machine of the present disclosure is shown.

[0023] Figure 5 A structure diagram of the second surface of the installation plate of the roll-type film laminating machine of the present disclosure is shown.

[0024] Figure 6 A structure diagram of another angle of the second surface of the installation plate of the roll-type film laminating machine of the present disclosure is shown.

[0025] In the figure: 10, first film supply assembly; 10-1, second film supply assembly; 11, first film clamping mechanism; 11-1, second film clamping mechanism; 111, first clamping part; 112, second clamping part; 113, driving part; 121, upper cutting part; 121-1, driving part; 121-2, cutting knife; 122, lower cutting part; 21, first roller; 22, second roller; 211, first film laminating part; 212, second film laminating part; 213, driving assembly; 214, avoiding slot; 31, first retaining mechanism; 31-1, second retaining mechanism; 311, rotating assembly; 3111, rotating driving part; 3111-1, rotating shaft; 3112, fan-shaped rotating part; 3113, notch; 312, retaining driving piece; 313, film abutting piece; 314, vacuum suction hole; 40, guide roller; 50, abutting assembly; 50-1, through hole; 51, floating piece; 52, spring assembly; 55, support column; 56, spring; 57, limiting plate; 58, connecting piece; 59, through hole; 60, arc-shaped hole; 70, installation plate; 70-1, fixed plate; 70-2, support seat; 80, workpiece; 90, film. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in combination with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present disclosure.

[0027] It should be understood that the terms "comprises" and "comprising," when used in this specification and claims, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0028] It should also be understood that the terms used in the specification and claims are for the purpose of describing specific embodiments and are not intended to be limiting of the disclosure. As used in this specification and claims, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. It should also be further understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items, and that the term "at least one of" followed by a list of two or more items means any single one of the items in the list, and that the term "one or more of" followed by a list of two or more items means any single one or plurality of two or more of the items in the list.

[0029] As used in this specification and claims, the term "if" can be construed to mean "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [a described condition or event] is detected" can be construed to mean "upon determining" or "in response to determining" or "upon detecting [the described condition or event]" or "in response to detecting [the described condition or event]," depending on the context.

[0030] Particular embodiments of the present disclosure are described in detail below with reference to the attached drawing figures.

[0031] As Figure 1 - Figure 4 As shown in the drawings, the present disclosure provides a roller type film pasting mechanism for pasting a film 90 to a workpiece. Specifically, the roller type film pasting mechanism comprises a rotating film pasting assembly for carrying the film 90 and pasting it to the surface of the workpiece. The rotating film pasting assembly comprises a first roller 21, and a driving assembly 213 is connected at the center of the first roller 21 to drive the first roller 21 to rotate. More specifically, the first roller 21 comprises a first film pasting portion 211 and a second film pasting portion 212 which are coaxial with respect to a driving shaft on the driving assembly 213 and are arranged at intervals along the circumferential direction of the first roller 21, and a recessed avoidance groove 214 is arranged between the first film pasting portion 211 and the second film pasting portion 212.

[0032] The first film pasting portion 211 and the second film pasting portion 212 are fan-shaped structures with a predetermined thickness arranged oppositely along the rotation axis, and the fan-shaped structures have a circular arc surface for carrying the film 90. In the present scheme, in order to avoid bubbles between the film 90 and the circular arc surface, an adsorption assembly is mounted on the outer surface of each of the first film pasting portion 211 and the second film pasting portion 212.

[0033] In this solution, the rotating film pasting assembly has two working states, namely the first state and the second state. Specifically, in the first state, the adsorption assembly generates suction force, thereby fixing the film 90 on the outer surface of the first film pasting part 211 or the second film pasting part 212, and driving the film 90 to rotate with the first roller 21 to the second state (from the state shown in Figure 1 to the state shown in Figure 4 , that is, after the film 90 is installed on the first film pasting part 211, the first roller 21 rotates clockwise by ninety degrees). In the second state (not shown in the figure), the adsorption assembly releases the film 90, so that the film 90 continues to rotate with the first roller 21, and the film 90 is pasted to the surface of the workpiece by the pressure applied by the first film pasting part 211 or the second film pasting part 212. That is, the second state refers to the first film pasting part 211 with the film 90 pasted continues to rotate clockwise by one hundred and eighty degrees at the position shown in Figure 4 , thereby completing the film pasting operation. That is, the first film pasting part 211 in Figure 4 moves clockwise to the position where the second film pasting part 212 is located to complete the film pasting operation.

[0034] In this solution, a plurality of vacuum suction holes 314 are provided on the arc surfaces of the first film pasting part 211 and the second film pasting part 212 as the adsorption assembly. The arrangement of these vacuum suction holes 314 is crucial to the film pasting process, and their main role is to enhance the abutting effect between the film 90 and the outer surfaces of the first film pasting part 211 and the second film pasting part 212. By forming a local vacuum, the vacuum suction holes 314 can effectively adsorb the film 90, so that it is tightly pasted to the outer surface of the film pasting part.

[0035] The benefit of this design is that once the film 90 is cut and both the first film clamping mechanism 11 and the first holding mechanism 31 release the film 90, the film 90 will not fall off the outer surface of the film pasting part when it is rotated under the drive of the first film pasting part 211 or the second film pasting part 212 due to the adsorption force provided by the vacuum suction holes 314. This ensures the continuity and stability of the film pasting process, and the film 90 can maintain correct alignment and tight pasting with the surface of the workpiece even during the rotation of the film pasting part.

[0036] In addition, the design of the vacuum suction holes 314 also helps to exclude gas and / or bubbles during the film pasting process, further improving the film pasting quality. Through this innovative design, the roller type film pasting mechanism can realize efficient and stable film pasting operation, meeting the needs of high-precision film pasting.

[0037] As can be understood by those skilled in the art, the adsorption assembly in this solution can also use classic adsorption or other small abutting parts instead of the vacuum suction holes 314 described in the above solution.

[0038] As shown in Figure 5 andFigure 6 In one specific embodiment, the roller-type film sticking mechanism further comprises a first holding mechanism 31, which includes a holding driving member 312 and a film abutting member 313. Specifically, the film abutting member 313 is connected with the holding driving member 312, which can drive the film abutting member 313 to move along the radial direction of the first roller 21, thereby switching between the initial change state and the terminal change state.

[0039] More specifically, in the initial change state, the film abutting member 313 moves to a position close to the film 90 and abuts the film 90 against the outer surface of the first film sticking part 211 or the second film sticking part 212. In this state, the film abutting member 313 rotates with the rotation of the first roller 21 and always maintains contact with the film 90. When switched to the terminal change state, the film abutting member 313 moves away from the film 90 and returns to its original position.

[0040] In use of the roller-type film sticking mechanism, the film 90 is first pulled out and tensioned by the guide part, and then placed at the first end of the first film sticking part 211 of the first roller 21. The first holding mechanism 31 drives the film abutting member 313 to abut the film 90 against the first end along the radial direction of the first roller 21. Then, the holding assembly is controlled to rotate synchronously with the first roller 21 (the rotation direction can be clockwise or counterclockwise), which enables the film 90 to completely cover the outer surface of the first film sticking part 211 and then complete the initial change state. That is, the initial change state of the first holding mechanism 31 in the present scheme is to press one end of the film 90 against the first film sticking part 211 or the second film sticking part 212, and then the film 90 is attached to the outer surface of the first film sticking part 211 or the second film sticking part 212 with the rotation of the first roller 21.

[0041] When the film 90 is completely covered, the first holding mechanism 31 drives the film abutting member 313 to move away from the first roller 21 along the radial direction to release the film 90, ensuring that it is no longer subjected to additional tension. Subsequently, the first film sticking part 211 or the second film sticking part 212 is controlled to continue rotating and abut against the workpiece 80 to perform the film sticking operation. In this step, the film 90 is accurately attached to the surface of the workpiece, realizing the film sticking process. After completing the film sticking of one workpiece, the holding assembly is controlled to rotate in the opposite direction to return to its original position during the film sticking operation, and is ready for the film sticking of the next workpiece, thereby completing the second motion state. This enables the film 90 to continue to cooperate with the second film sticking part 212 and cover the outer surface of the second film sticking part 212. In this way, the film sticking mechanism is ready for the film sticking operation of the next workpiece, ensuring the continuity and efficiency of the film sticking process.

[0042] It can be understood by those skilled in the art that when the first roller 21 is Figure 1In the state shown in FIG. 1, the first holding mechanism 31 is in the holding state. Figure 5 In the state shown in FIG. 1.

[0043] It is also worth mentioning that the outer surface of the first film-attaching part 211 in the present solution includes a first end and a second end, wherein the first end refers to the left end when the arc-shaped outer surface of the first film-attaching part 211 is arranged upward, and the second end refers to the right end when the arc-shaped outer surface of the first film-attaching part 211 is arranged upward. Similarly, the outer surface of the second film-attaching part 212 also includes a first end and a second end.

[0044] In the understanding of those skilled in the art, the above-mentioned solution is described as a specific example of performing the film-attaching operation by rotating the film-attaching assembly clockwise. However, this does not mean that the present solution is limited to this operation mode. In fact, the film-attaching operation can also be performed by rotating the film-attaching assembly counterclockwise, and this counterclockwise operation mode is also fully included in the protection scope of the present solution.

[0045] The solution provided by the present disclosure is that when performing the film-attaching operation, the workpiece is moved with the rotating film-attaching assembly for film-attaching. Due to the arc-shaped outer surface of the first film-attaching part 211 or the second film-attaching part 212, the gas and / or bubbles can be gradually excluded from between the film 90 and the workpiece by the pressure when the film 90 contacts the workpiece during the film-attaching process, thereby improving the quality of the film-attaching and the flatness of the product.

[0046] In a specific embodiment, the roller film-attaching mechanism further includes a first film-feeding assembly 10, wherein the first film-feeding assembly 10 includes a first film-clamping mechanism 11 arranged at the edge of the first roller 21 in the radial direction, and the first film-clamping mechanism 11 can be switched between a film-clamping state and a release state.

[0047] In the present solution, as shown in Figure 2 and Figure 3 The first film-feeding assembly 10 includes a first film-clamping mechanism 11, and the first film-clamping mechanism 11 includes a driving part 113, a first clamping part 111 fixedly connected with the driving part 113, and a second clamping part 112 arranged correspondingly with the first clamping part 111. In the operation process, the first clamping part 111 and the second clamping part 112 work cooperatively to stably clamp the film 90 therebetween.

[0048] In use, the driving part 113 plays its role to drive the first clamping part 111 to move towards the second clamping part 112, or to move away from the second clamping part 112 as needed. This movement control enables the first film-clamping mechanism 11 to be flexibly switched between the film-clamping state and the release state.

[0049] As shown in Figure 2 and Figure 3As shown, in one specific embodiment, the first film supply assembly 10 further comprises a cutting section, which includes an upper cutting section 121 and a lower cutting section 122, wherein the upper cutting section 121 is movable relative to the outer surface of the first film applying section 211 and the second film applying section 212 towards the lower cutting section 122 to cut the film 90.

[0050] In this embodiment, the first film supply assembly 10 further comprises an upper cutting section 121 and a lower cutting section 122. The upper cutting section 121 is disposed above the first roller 21 and comprises a driving section 121-1 and a cutting knife 121-2. The lower cutting section 122 is a groove disposed on the outer surface of the first film applying section 211. When it is necessary to cut the film 90, the driving section on the upper cutting section 121 drives the cutting knife to move towards the groove of the lower cutting section 122 to perform the cutting operation.

[0051] Of course, those skilled in the art can understand that the second end of the second film applying section 212 is also provided with a lower cutting section 122. When the second end of the second film applying section 212 corresponds to the upper cutting section 121, the above cutting operation is repeated to cut the film 90.

[0052] In this embodiment, when the film 90 completely covers the outer surface of the first film applying section 211, the first film clamping mechanism 11 is disposed corresponding to the second end of the first film applying section 211. Next, the driving section 113 controls the first clamping section 111 to move towards the second clamping section 112 and clamp the film 90 at the second end between the two. At this time, the film 90 at the first end is pressed by the first holding mechanism 31, and the film 90 at the second end is pressed by the first film clamping mechanism 11. Next, the upper cutting section 121 is controlled to move towards the lower cutting section 122 to cut the film 90. This step ensures the accuracy of the film application and also prepares for the film application operation of the next workpiece.

[0053] Those skilled in the art can understand that the length and width of the arc-shaped outer surface of the first film applying section 211 and the second film applying section 212 can be correspondingly arranged with the length and width of the workpiece to be applied with the film. During operation, when the film 90 completely covers the outer surface of the first film applying section 211, the upper cutting section 121 and the lower cutting section 122 work together to accurately cut the film 90, ensuring that the size of the cut film 90 matches the size of the workpiece. After cutting is completed, the film application operation is immediately performed. The film 90 is guided onto the workpiece, and the arc-shaped outer surface of the first film applying section 211 or the second film applying section 212 is tightly attached to the surface of the workpiece, achieving a high-quality film application effect. This design not only improves the efficiency of the film application, but also ensures the accuracy and quality of the film application, and is suitable for the film application needs of workpieces of different sizes.

[0054] In the scheme of the present disclosure, the upper cutting part 121 and the lower cutting part 122 are integrated on the roller type film pasting mechanism, and there is no need to additionally set the cutting part. The integrated design not only reduces the space occupied by the equipment, but also can realize the accurate cutting of the film 90, and the film pasting process is more convenient.

[0055] In a specific embodiment, the upper cutting part 121 is arranged in parallel with the first film clamping mechanism 11.

[0056] In a specific embodiment, as shown in Figure 1 , the first film pasting part 211 and the second film pasting part 212 are rotationally symmetrically arranged at a rotation angle of 180° relative to the rotation axis 3111-1 line of the first roller 21, and the first film pasting part 211 and the second film pasting part 212 are provided with a radially concave avoidance groove 214.

[0057] As shown in Figure 1 , in a specific embodiment, the first film supply assembly 10 further comprises a guide part, which comprises a plurality of rotatable guide rollers 40, and the film 90 is arranged on the outer surfaces of the plurality of guide rollers 40. In use, the film 90 is transferred through the plurality of guide rollers 40 and is covered on the arc-shaped outer surface of the rotating film pasting assembly. The design of the guide part also helps to reduce the wear of the film 90 during the film pasting process, and can protect the film 90 from being damaged.

[0058] As shown in Figure 5 and Figure 6 , in a specific embodiment, the first holding mechanism 31 comprises a holding rotating assembly 311, a holding driving part 312 and a film abutting part 313, the holding driving part 312 is fixedly connected with the rotating part of the holding rotating assembly 311, and the film abutting part 313 is drivingly connected with the holding driving part 312 to abut or release the film 90 relative to the first roller 21.

[0059] The holding rotating assembly 311 comprises a rotating driving part 3111 and a fan-shaped rotating part 3112, the rotation axis 3111-1 of the rotating driving part 3111 abuts against the outer arc surface of the fan-shaped rotating part 3112, and the fan-shaped rotating part 3112 is rotatably connected with the first roller 21.

[0060] In the scheme, as shown in Figure 5 and Figure 6As shown, the first holding mechanism 31 comprises a holding rotating assembly 311, a holding driving member 312 and a film abutting member 313. Specifically, the holding driving member 312 refers to a cylinder and a cylinder rod connected with the cylinder. The film abutting member 313 refers to a pressing plate in a plate structure, one end of which is fixedly connected with the cylinder rod. In use, the cylinder drives the cylinder rod to move, so as to drive the pressing plate to move close to or rotate against the arc-shaped outer surface of the rotating film attaching assembly, and then the pressing plate abuts against or releases the film 90 on the rotating film attaching assembly. The holding rotating assembly 311 comprises a rotating driving part 3111 and a sector rotating part 3112, the rotating driving part 3111 is provided with a rotating shaft 3111-1, and the rotating shaft 3111-1 abuts against the outer arc surface of the sector rotating part 3112.

[0061] More specifically, the cylinder on the holding driving member 312 is fixedly connected with the sector rotating part 3112, and the sector rotating part 3112 is provided with an opening 3113 on the side wall (i.e. radius) of the first end, and the pressing plate can extend out of the opening 3113 and then extend above the rotating film attaching assembly.

[0062] In use, after the film 90 is pulled out and placed on the first end of the first film attaching part 211 of the first roller 21, the first surface of the film 90 abuts against the outer surface of the first roller 21, at this time, the cylinder on the holding driving member 312 is controlled to start, so that the cylinder rod drives the pressing plate to move downward and abut against the second surface of the film 90. Then the rotating driving part 3111 on the holding rotating assembly 311 and the driving part on the rotating film attaching assembly are controlled to move simultaneously, at this time, the driving part on the rotating film attaching assembly drives the first roller 21 to rotate in the clockwise direction, the rotating shaft 3111-1 on the rotating driving part 3111 drives the sector rotating part 3112 to rotate in the clockwise direction synchronously with the first roller 21, until the second end of the first roller 21 stops rotating corresponding to the upper cutting part 121 and the lower cutting part 122. Next, the upper cutting part 121 is controlled to move to the lower cutting part 122 to cut the film 90. After the cutting is completed, the driving mechanism continues to control the first roller 21 to rotate in the clockwise direction to perform the film attaching operation, the rotating shaft 3111-1 on the rotating driving part 3111 drives the sector rotating part 3112 to rotate in the counterclockwise direction back to the initial position, and then continues to cooperate with the second roller to attach the film 90 on the outer surface of the second roller.

[0063] In one specific embodiment, the roller type film pasting mechanism comprises a vertically placed mounting plate 70. The first film supply assembly 10 and the rotating film pasting assembly are arranged on a first side of the mounting plate 70, and the holding assembly is arranged on a second side of the mounting plate 70. Specifically, the second side is provided with a plate-shaped floating member 51 arranged perpendicularly to the mounting plate 70, and the driving assembly on the rotating film pasting assembly is arranged on the upper surface of the floating member 51. The mounting plate 70 is provided with a through hole 50-1 penetrating through the first side and the second side, and the driving shaft on the driving assembly is connected to the first roller 21 on the rotating film pasting assembly through the through hole 50-1. A fixing block is further arranged on the second side for fixing the rotating driving part 3111 on the rotating assembly 311. In addition, a fixing plate 70-1 is also arranged on the first side for fixing the first film clamping mechanism 11 and the upper cutting part 121.

[0064] As shown in Figure 5 In this embodiment, the mounting plate 70 is further provided with an arc-shaped hole 60 arranged penetrating through the first side and the second side, and the contour of the arc-shaped hole 60 is consistent with the arc of the arc-shaped outer surface of the rotating film pasting assembly. In use, the film abutting member 313 penetrates through the arc-shaped hole 60 and abuts against the film 90 on the arc-shaped outer surface of the first film pasting part 211 or the second film pasting part 212 arranged on the first side.

[0065] It is worth noting that the outer periphery of the driving shaft on the driving assembly 213 is sleeved with a cylindrical shell, and the fan-shaped rotating part 3112 in this embodiment is fixed on the shell, and when the rotating driving part 3111 is started, the fan-shaped rotating part 3112 rotates around the driving shaft in conjunction with the shell.

[0066] It is understood by those skilled in the art that a fixed shaft can be arranged on the second side wall, and the fan-shaped rotating part 3112 is rotatably connected to the fixed shaft.

[0067] In some embodiments, the present disclosure provides a film pasting device, which comprises at least one set of the roller type film pasting mechanism described in the above-mentioned embodiments, wherein the roller type film pasting mechanisms are arranged in mirror image with respect to the battery to be pasted. The roller type film pasting mechanisms are arranged in pairs on both sides of the upper and lower surfaces of the battery, so that the upper and lower surfaces of the battery can be operated simultaneously in one film pasting process.

[0068] As shown in Figure 1 and Figure 2As shown, the film pasting device further comprises a second film feeding assembly 10-1 which is mirror-symmetrically arranged with the first film feeding assembly 10, a second film clamping mechanism 11-1 which is mirror-symmetrically arranged with the first film clamping mechanism 11, a second roller 22 which is mirror-symmetrically arranged with the first roller 21, and a second holding mechanism 31-1 which is mirror-symmetrically arranged with the first holding mechanism 31. That is, in the present scheme, through the mirror-symmetric design, the roller-type film pasting mechanism can simultaneously complete the film pasting on both sides of the workpiece 80 within a single working cycle, which not only improves the film pasting efficiency, but also ensures the consistency of the film pasting quality. This design is particularly suitable for workpieces 80 which need to be pasted on both sides simultaneously, such as battery pole pieces or other similar products, making the production process more efficient and economical.

[0069] In a specific embodiment, the driving assembly 213 of the rotating film pasting assembly has a driving shaft for the rotation of the first roller. Specifically, the driving assembly 213 is arranged on the second side of the mounting plate 70, and the driving shaft is connected with the first roller 21 on the first side through the through hole 50-1 on the mounting plate 70. It is worth noting that the through hole 50-1 in the present scheme has a predetermined extension length in the vertical direction.

[0070] As understood by those skilled in the art, the design of the roller-type film pasting mechanism fully considers the requirement of film pasting on both sides of the workpiece. When the workpiece needs to be pasted on both sides, the mechanism allows the workpiece to be placed between the first roller 21 and the second roller 22 which are mirror-symmetrically arranged in the horizontal direction. Through the cooperative work of the first film pasting part 211 or the second film pasting part 212, the film pasting operation can be performed on both sides of the workpiece.

[0071] However, due to the possible differences in the thickness of different workpieces, the design of the roller-type film pasting mechanism needs to adapt to such diversity. In order to ensure that workpieces of different thicknesses can be properly pasted, the abutting assembly 50 is specially arranged to adapt to workpieces of different thicknesses. When a workpiece of large thickness is pasted, when the workpiece 80 is placed between the first roller 21 and the second roller 22, the workpiece 80 will lift the first roller 21 and the driving shaft connected therewith in the first direction (i.e. the vertical direction) and move upward along the through hole 50-1, and the driving shaft in turn drives the floating member 51 to move upward to provide a placing space for the workpiece. After the film pasting of the workpiece is completed, the first roller 21 moves downward to return to the initial position.

[0072] As Figure 5As shown, in one specific embodiment, the film pasting device further comprises a position adjusting assembly which adjusts the distance between the rotation axes of the first roller 21 and the second roller 22 in the corresponding set of film pasting roller mechanisms by changing the position of the connecting piece 58 in the through hole 59. The position adjusting assembly further comprises a pressing assembly 50 which comprises a floating piece 51 and two sets of spring assemblies 52 arranged on the upper surface of the floating piece 51. Next, the spring assembly 52 and how the floating piece 51 is pressed by the spring assembly 52 towards the surface of the workpiece to be pasted with the film will be described in detail.

[0073] Specifically, the spring assembly 52 comprises a support column 55, a spring 56 sleeved on the outer periphery of the support column 55, and a limiting plate 57. One end of the support column 55 is fixedly connected to the upper surface of the floating piece 51, and the other end passes through the through hole in the limiting plate 57, wherein the support column 55 is in sliding connection with the through hole in the limiting plate 57. Two connecting pieces 58 are arranged on the limiting plate 57, and the connecting pieces 58 are connected with the mounting plate 70.

[0074] As can be understood by those skilled in the art, the distance between the first roller 21 and the second roller 22 can be adjusted by adjusting the position of either one, so in the present scheme, only the spring assembly 52 is arranged on the floating piece 51 connected with the first roller 21. The floating piece 51 connected with the second roller is not provided with a spring assembly 52, and the floating piece 51 can be fixedly connected with the mounting plate 70.

[0075] In one specific embodiment, two through holes 59 with a preset extension length are also symmetrically arranged on the mounting plate 70 for connection with the connecting pieces 58 in the pressing assembly 50. That is, in the present scheme, the connecting pieces 58 on the mounting plate 70 can move up and down along the through holes. When the thickness of the workpiece 80 to be pasted with the film is within the adjustment range of the through hole 50-1, the workpiece 80 can be placed between the first roller 21 and the second roller 22 and moved along with the rotation of the two rollers to complete the film pasting operation. However, when the thickness of the workpiece to be pasted with the film exceeds the adjustable range of the through hole 50-1, the position of the connecting piece 58 in the through hole 59 can be adjusted to meet the film pasting needs of workpieces of different thicknesses.

[0076] In one specific embodiment, the film pasting roller mechanism further comprises a horizontally placed support seat 70-2, and the support seat 70-2 is provided with a mounting groove, and the mounting plate 70 is fixed in the mounting groove.

[0077] The film pasting roller mechanism provided by the present disclosure can gradually expel gas and / or bubbles from between the film and the workpiece during the film pasting process due to the circular arc-shaped outer surface, thereby improving the quality of film pasting and the flatness of the product. In addition, the present scheme can simultaneously perform film pasting operation on both sides of the workpiece, thereby improving the film pasting efficiency.

[0078] While several embodiments of the disclosure have been shown and described herein, it is to be understood that the embodiments are merely exemplary. Numerous changes, substitutions and equivalents can occur to those skilled in the art without departing from the spirit and scope of the disclosure. It should be understood that various alternatives to the embodiments of the disclosure described herein can be employed in practicing the disclosure. It is intended that the following claims define the scope of the disclosure and that methods equivalent to those claims recited herein are within the scope and spirit of the disclosure.

Claims

1. A roller-type film-applying mechanism for applying a thin film (90) to a workpiece, characterized in that, The application relates to a rotary film pasting assembly, which comprises a first roller (21) capable of rotating relative to a rotating shaft, wherein the first roller (21) comprises a first film pasting part (211) and a second film pasting part (212), the first film pasting part (211) and the second film pasting part (212) are coaxial relative to the rotating shaft and are arranged at intervals along the circumferential direction of the first roller (21), and the first film pasting part (211) and the second film pasting part (212) have the same radial dimension, so that the outer surfaces of the first film pasting part (211) and the second film pasting part (212) are on the same circular arc surface. Suction assemblies are arranged on the first film pasting part (211) and the second film pasting part (212). In a first state, the suction assemblies generate suction force to position the film on the outer surfaces of the first film pasting part (211) and / or the second film pasting part (212), and drive the film (90) to rotate with the first roller (21) to a second state. In the second state, the suction assemblies release the film, so that the film (90) rotates with the first roller (21), and the pressure applied by the first film pasting part (211) and / or the second film pasting part (212) causes the film (90) to be pasted to the surface of the workpiece. The application further relates to a first holding mechanism (31), wherein the first holding mechanism (31) comprises a holding driving element (312) and a film abutting element (313), the film abutting element (313) is drivingly connected with the holding driving element (312) and is switched between an initial change state and a terminal change state. 2.The roll-type film sticking mechanism according to claim 1, wherein In the initial change state, the film abutting element (313) is close to the film (90) and abuts the film (90) to the outer surfaces of the first film pasting part (211) and / or the second film pasting part (212); and in the first state, the film abutting element (313) rotates with the first roller (21) and abuts the film (90). In the terminal change state, the film abutting element (313) is away from the film (90) and is reset. The first holding mechanism (31) further comprises a holding rotating assembly (311) and a sector rotating part (3112), wherein the holding rotating assembly (311) limits the movement path of the film abutting element (313) in the arc-shaped hole (60) of the sector rotating part (3112). 3.The roll-type film sticking mechanism according to claim 2, characterized in that, The holding driving element (312) and the film abutting element (313) are arranged on the sector rotating part (3112) and rotate synchronously with the sector rotating part (3112). 4.The roll-type film sticking mechanism according to claim 3, characterized in that, The roller type film pasting mechanism further comprises a first film supplying assembly (10), and the first film supplying assembly (10) comprises a first film clamping mechanism (11) arranged at the edge of the first roller (21) in the radial direction. 5.The roll-type film pasting mechanism according to any one of claims 1-4, wherein, ​ The first film clamping mechanism (11) comprises a first clamping part (111) and a second clamping part (112), the second clamping part (112) tensions and guides the film (90) to the outer surface of the first film pasting part (211) and / or the second film pasting part (212), and the first clamping part (111) can move towards the second clamping part (112) to clamp the film (90). 6.The roll-type film sticking mechanism according to claim 5, wherein The roller film pasting mechanism further comprises a cutting part, the cutting part comprises an upper cutting part (121) and a lower cutting part (122), the upper cutting part (121) can move relative to the outer surface of the first film pasting part (211) and / or the second film pasting part (212) to cut the film; The lower cutting part (122) is arranged on the outer surface of the first film pasting part (211) and / or the second film pasting part (212) to avoid the movement of the upper cutting part (121). 7.The roll-type film sticking mechanism according to claim 5, wherein The roller film pasting mechanism further comprises a guiding part, the guiding part comprises a plurality of rotatable guiding rollers (40), the guiding rollers (40) of the guiding part provide tension to deliver the film (90) to the first film feeding assembly (10).

8. A battery surface film attaching apparatus characterized by comprising: The film pasting device comprises at least one set of the roller film pasting mechanism according to any one of claims 1 to 7, wherein the roller film pasting mechanism is arranged in mirror image with respect to the battery to be pasted with film. 9.The film pasting apparatus according to claim 8, characterized in that, The film pasting device further comprises a positioning adjustment assembly, the positioning adjustment assembly adjusts the distance between the rotation axes of the first roller (21) and the second roller (22) in the corresponding set of the roller film pasting mechanism by changing the position of the connecting piece (58) in the through hole (59). 10.The film pasting apparatus according to claim 9, characterized in that, The positioning adjustment assembly further comprises a pressing assembly (50) comprising a spring assembly (52) and a floating piece (51) pressed by the spring assembly (52) towards the surface of the workpiece to be pasted with film, the first roller (21) is rotatably arranged on the floating piece (51), and the floating piece (51) moves in a first direction to adapt to different sizes of the battery cell.

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