Film sticking device and film sticking machine

Abstract

The utility model discloses a film pasting device and a film pasting machine, the film pasting device is used for pasting a film on the surface of a workpiece, the device comprises a bearing part, a film pulling part and a clinging part, and the bearing part is used for bearing the workpiece; the film drawing part is arranged on the side, deviating from the bearing part, of the workpiece in the first direction and comprises a film supply part and a film clamping part which are oppositely arranged in the second direction, the film supply part is used for providing a to-be-attached film for the workpiece, and the film clamping part can move in the second direction to be close to or away from the film supply part; the clamping part is used for clamping the to-be-attached film provided by the film supply part, so that the to-be-attached film extends on the surface of the workpiece; the attaching component is arranged on the side, away from the workpiece, of the film to be attached in the first direction and can flatly press the film to be attached to the surface of the workpiece. According to the technical scheme, when the lithium battery is subjected to film pasting, bubbles or marks generated by film absorption are avoided, the film pasting condition is automatically detected and processed, and meanwhile pasted films used in the film pasting operation process are saved.

Description

Technical Field

[0001] This disclosure generally relates to lithium battery manufacturing equipment. More specifically, this disclosure relates to a lithium battery film application device. Background Technology

[0002] Battery coating is a crucial step in lithium battery production. Its primary purpose is to wrap the battery's outer surface with an insulating material to enhance its safety and stability. The coating prevents short circuits or electric shocks during transportation and use, thus improving battery safety. Furthermore, the coating material typically has one-sided adhesion, forming a protective layer on the battery surface to prevent scratches and leakage.

[0003] Chinese utility model patent CN209183671U discloses a film-applying device for lithium batteries. The main steps of this technical solution are: first, the initial film is straightened by a roller; then, a film cutter is used to cut the required portion; next, a picking mechanism is used to transfer the cut portion of the film to the upper surface of the lithium battery to be coated; finally, a stamping mechanism is used to tightly adhere the cut film to the upper surface of the lithium battery.

[0004] However, this technical solution has some shortcomings. First, the cut film is transferred via a pick-up mechanism. This transfer method involves adsorbing the cut film onto a suction plane, and then pressing the film onto the battery surface using that plane. Because this method cannot completely flatten the film onto the battery surface, air bubbles are more likely to form between the film and the battery surface. Furthermore, suction marks are easily left on the cut film during the suction process, affecting the battery's appearance.

[0005] Secondly, in this technical solution, in order to ensure that the cut film is flat relative to the surface of the object to be covered, the initial film needs to be connected to both the rotating drum and the take-up drum at the same time. However, the part of the cut film that is actually applied to the surface of the object to be covered is only a portion between the two drums. Therefore, this technical solution results in a lot of waste in the film application.

[0006] Finally, problems inevitably arise during the screen protector application process. Traditionally, this is done manually by visual inspection, without the use of automated equipment to check the application. This method is inconvenient and inefficient, necessitating the introduction of alternative technologies for improvement.

[0007] In view of this, there is an urgent need to provide a technical solution for a device for applying film to lithium batteries, so as to avoid the generation of air bubbles or marks caused by film suction while applying film to lithium batteries, and to automatically detect and process the film application, while saving the amount of film used in the application process. Utility Model Content

[0008] In order to solve the above-mentioned technical problems, this disclosure proposes a technical solution for a film application device in several aspects.

[0009] In a first aspect, this disclosure provides a film-applying apparatus for applying a film to the surface of a workpiece, comprising a carrying member, a film-pulling member, and a film-adhesive member. The carrying member carries the workpiece in a first direction. The film-pulling member is disposed on the side of the workpiece away from the workpiece carrying member in the first direction. The film-pulling member includes a film-supplying part and a film-clamping part. The film-supplying part and the film-clamping part are respectively disposed opposite to each other in a second direction. The film-supplying part provides the workpiece with the film to be applied. The film-clamping part is movable in the second direction to approach or move away from the film-supplying part and clamp the film to be applied provided by the film-supplying part, so that the film to be applied extends on the surface of the workpiece. The film-adhesive member is disposed on the side of the film to be applied away from the workpiece in the first direction and is movable in both the first and second directions to press the film to be applied flatly onto the surface of the workpiece. The first direction and the second direction are perpendicular to each other, and the first direction is perpendicular to the conveying direction of the film to be applied, while the second direction is parallel to the conveying direction of the film to be applied.

[0010] In some embodiments, the clamping portion includes a first slide rail and a clamping plate that are slidably connected, the first slide rail extending along the second direction to allow the clamping plate to slide along the second direction; the clamping plate includes a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate being disposed opposite to and parallel to each other in the first direction, and at least one of the first clamping plate and the second clamping plate being able to move closer to or further away from the other along the first direction.

[0011] In some embodiments, the bonding component further includes a connecting portion, which includes a second slide rail and a first connecting portion. One end of the first connecting portion is movably connected to the pressing portion, and the other end of the first connecting portion is slidably connected to the second slide rail. The second slide rail is disposed on the top plate and extends along the second direction to support the bonding component. One end of the pressing portion is movably connected to the top plate through the first connecting portion, and the first connecting portion can drive the pressing portion in the first direction so that the other end of the pressing portion approaches or moves away from the surface of the workpiece.

[0012] In some embodiments, the film application device further includes a detection component disposed on the top plate, the detection end of the detection component facing the workpiece along the first direction, for detecting the flatness of the workpiece.

[0013] In a second aspect, this disclosure provides a film applicator, wherein the film applicator includes a plurality of hoppers and a film applicator as described in any one of the embodiments of this disclosure, at least one of the hoppers being used to provide the workpiece to which the film is to be applied to the film applicator, and at least one of the hoppers being used to collect the workpiece to which the film has been applied by the film applicator.

[0014] By using the technical solution of the film-applying device provided above, the embodiments disclosed herein utilize a cylindrical pressing section and a roller pressing method for film application, thereby avoiding the generation of air bubbles or film suction marks. Furthermore, in one embodiment, the cooperation between the film supply section and the film clamping section within the film-pulling component can save on the film used during the film application process, reducing film waste. Even further, in one embodiment, by providing a detection component on the top plate, the film application process can be automatically detected and processed, thus avoiding the generation of air bubbles or film suction marks while applying film to lithium batteries, and simultaneously saving on the film used during the film application process. Attached Figure Description

[0015] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0016] Figure 1a , Figure 1b This diagram shows the overall structure of the film application device in an embodiment of this disclosure;

[0017] Figure 2 A front view of the film application device in this disclosure embodiment is shown;

[0018] Figure 3 A side view of the film application device in an embodiment of this disclosure is shown;

[0019] Figure 4 A structural diagram of the film-pressing section and the film-clamping section of the film-applying device in this embodiment is shown;

[0020] Figure 5a - Figure 5f An example diagram of pulling a film according to an embodiment of this disclosure is shown;

[0021] Figure 6 A schematic diagram of the clamping notch of the clamping plate and the clamping protrusion of the second frame base plate is shown.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1 - Frame, 11 - Base plate, 12 - Top plate;

[0024] 2 – Load-bearing component, 21 – Conveying unit, 22 – First drive motor;

[0025] 3 - Film pulling component, 31 - Film supply part, 311 - Support frame, 3111 - First support, 3112 - Second support, 3114 - Second through hole, 312 - Film supply body, 3121 - First roller, 32 - Film clamping part, 321 - First fixing plate, 322 - First connecting block, 3221 - Third through hole, 3222 - First shaft, 323 - Second fixing plate, 324 - Second connecting block, 3241 - Fourth through hole, 3242 - Second shaft, 325 - Clamping plate, 3251 - First clamping plate, 3252 - Second clamping plate;

[0026] 4 - Fitting component, 41 - Pressing part, 42 - Connecting part, 422 - First connecting part, 423 - Second connecting part, 4231 - Fifth through hole, 424 - Second slide rail;

[0027] 5 - Separation component, 51 - Shearing part, 511 - Blade, 52 - Third drive component, 53 - First frame, 54 - Second frame, 541 - Second frame base plate;

[0028] 6 - Detection components;

[0029] 8 – Thin film, 81 – End furthest from the film supply section;

[0030] 91 - Clamping protrusion, 92 - Clamping notch;

[0031] X – First direction, Y – Second direction, Z – Third direction. Detailed Implementation

[0032] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0033] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0034] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0035] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0036] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0037] Figure 1a , Figure 1b , Figure 2 and Figure 3 The overall structural diagram, front view, and side view of the film application device in the embodiments of this disclosure are shown respectively.

[0038] As shown in the figure, this disclosure presents a film-applying device for applying a film to the surface of a workpiece, comprising a supporting component 2, a film-pulling component 3, and an applicating component 4; wherein, the supporting component 2 is used to support the workpiece in a first direction X; the film-pulling component 3 is disposed on the side of the supporting component 2 opposite to the workpiece in the first direction X, the film-pulling component 3 includes a film-supplying part 31 and a film-clamping part 32, the film-supplying part 31 and the film-clamping part 32 are respectively disposed opposite to each other in a second direction Y, the film-supplying part 31 is used to provide the workpiece with the film to be applied, and the film-clamping part 32 is movable in the second direction Y to... The film to be attached is brought close to or away from the film supply section 31 and clamped by the film supply section 31, so that the film to be attached extends on the surface of the workpiece; the pressing member 4 is disposed on the side of the film to be attached away from the workpiece in the first direction X, and can move in the first direction X and the second direction Y to press the film to be attached flatly onto the surface of the workpiece; the first direction X and the second direction Y are perpendicular to each other, and the first direction X is perpendicular to the conveying direction of the film to be attached, and the second direction Y is parallel to the conveying direction of the film to be attached.

[0039] Specifically, the film-applying device includes a carrier component 2, a film-pulling component 3, and an applicator 4. The carrier component 2 carries the workpiece in the first direction X, i.e., the workpiece is placed on the carrier component 2. The film-pulling component 3 stretches the film to be applied provided by the film supply unit, thereby extending the film to be applied onto the surface of the workpiece. The film-pulling component 3 is positioned on the side of the workpiece facing away from the carrier component 2 in the first direction X, aligning the carrier component 2, the workpiece, and the film to be applied along the first direction X. The film-pulling component 3 includes a film supply unit 31 and a film clamping unit 32, which are respectively arranged opposite each other in the second direction Y. The film supply unit 31 provides the film to be applied to the workpiece, and the film clamping unit 32 can move in the second direction Y to approach or move away from the film supply unit 31, clamping the film to be applied provided by the film supply unit 31, causing the film to be applied to extend onto the surface of the workpiece. The film supply unit 31 and the film clamping unit 32 cooperate with each other to extend the film to be applied along the second direction Y, thereby facilitating the applicator of the extended film.

[0040] The bonding member 4 is positioned on the side of the film to be bonded, facing away from the workpiece, in the first direction X, and can move in both the first direction X and the second direction Y to flatly press the film onto the surface of the workpiece. After the film is cut, it is in loose contact with the workpiece surface in the first direction X. At this point, the bonding member 4 moves along the first direction X until it presses the film against the workpiece surface in the first direction X and makes tight contact. Then, the bonding member 4 moves along the second direction Y on the workpiece surface, ensuring tight contact between the film and the workpiece surface, thus coating the workpiece surface.

[0041] In this embodiment, the positional relationships are described using a first direction X, a second direction Y, and a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other, and the first direction X is perpendicular to the conveying direction of the film to be attached, that is, the first direction X is the cutting direction of the film to be attached.

[0042] In some embodiments, the film-applying device includes a frame 1, the frame 1 including a base plate 11 and a top plate 12, the base plate 11 and the top plate 12 being disposed opposite each other in the first direction X, and a receiving space being formed between the base plate 11 and the top plate 12, the supporting member 2 being disposed on the base plate 11, the applying member 4 being disposed on the top plate 12, and the film-pulling member 3 being disposed within the receiving space.

[0043] Specifically, such as Figure 1a , Figure 1bThe base plate 11 is located below the top plate 12 in the first direction X, and the two are parallel to each other and parallel to the horizontal plane to ensure that the workpiece to be coated and the film to be coated are in a horizontal state. The base plate 11 and the top plate 12 are fixedly connected by the side wall of the frame 1, and the base plate 11, the top plate 12 and the side wall together form an accommodating space, that is, the frame 1 has an accommodating space that can be used for coating operations. The material of the frame 1 is not limited, but metal is preferred for easy cleaning and maintenance. The horizontal cross-section of the frame 1 is not limited, but rectangular is preferred.

[0044] The support component 2 is located on the base plate 11. Its lower surface in the first direction X can directly contact the base plate 11, or it can be slightly higher than the base plate 11 without contact. Preferably, the lower surface in the first direction X of the support component 2 does not contact the base plate 11 to facilitate the installation of an automatic conveying device on the support component 2. The support component 2 is horizontal with the base plate 11, keeping the workpiece to be coated horizontal when placed on the support component 2. The contact surface between the support component 2 and the workpiece to be coated can be made of a material with a certain degree of friction, ensuring that the workpiece to be coated remains stably placed on the support component 2 throughout the coating process, preventing accidental slippage.

[0045] The overall height of the film-pulling component 3 is higher than that of the support component 2, and its lowest point is slightly higher than the surface of the workpiece to be film-applied on the support component 2 facing the top plate 12, so as to pull out the film to be applied for the film-applied operation. The film-pulling component 3 includes a film-supplying part 31 and a film-clamping part 32. The film-supplying part 31 is located at one end of the second direction Y of the internal storage space of the frame 1, and the film-clamping part 32 is located at the other end of the second direction Y of the internal storage space of the frame 1.

[0046] The film clamping part 32 can be fixedly connected to the frame 1, and is in the shape of a clamp. It can move along the second direction Y, so that the film pulled by the film clamping part 32 can be stretched on the surface of the workpiece to be coated, and the film pulled out can be straightened and parallel to the surface of the workpiece to be coated facing the top plate 12.

[0047] The bonding component 4 can be connected to the surface of the top plate 12, thereby providing support to the bonding component 4. One end of the bonding component 4 extends into the frame 1 from the cutout of the top plate 12 along the first direction X. This end is used to apply pressure to the film, so that the film is directly attached to the surface of the workpiece to be coated facing the top plate 12.

[0048] The bonding component 4 includes a film pressing part 41. In the first direction X, one end of the film pressing part 41 is movably connected to the top plate 12, and the other end of the film pressing part 41 faces the surface of the workpiece. The film pressing part 41 can move in the first direction X to approach or move away from the surface of the workpiece, and can slide in the second direction Y. By directly contacting the film and generating pressure on the film in the first direction X, the film to be bonded is pressed flatly onto the surface of the workpiece.

[0049] The carrying component 2 may further include a conveying section 21 for conveying and carrying the workpiece. The conveying section 21 of the carrying component 2 can transport the workpiece to be laminated to a position below the film pulled by the film clamping section 32, facilitating the lamination operation on the workpiece. The conveying section 21 can be a conveyor belt to save manpower and improve transportation efficiency. Multiple first drive motors 22 can be installed on the base plate 11 to drive the conveyor belt rollers of the conveying section 21 to rotate along the third direction Z, so that the workpiece placed in the conveying section 21 is conveyed along the second direction Y.

[0050] In addition, a sensor can be installed on the base plate 11 to determine the specific position of the workpiece to be coated on the conveyor 21, and then cooperate with the conveyor 21 to move the workpiece to be coated precisely to the designated position, improve the accuracy of the coating operation, and realize the entire process from workpiece transportation, coating, post-coating inspection and workpiece transportation.

[0051] In some embodiments, the film supply unit 31 includes a support frame 311 and a film supply body 312; the support frame 311 is disposed on the base plate 11 and includes a first support 3111 and a second support 3112, the first support 3111 and the second support 3112 are respectively disposed opposite to each other in a third direction Z, the third direction Z is parallel to the conveying direction of the film to be attached and perpendicular to the second direction Y; the film supply body 312 includes a first roller 3121, the two ends of the first roller 3121 are respectively rotatably connected to the first support 3111 and the second support 3112, and the film to be attached is wrapped around the outer peripheral surface of the first roller 3121, and the first roller 3121 rotates about an axis to convey the film to be attached.

[0052] Specifically, the support frame 311 of the film supply unit 31 is vertically fixed to the surface of the bottom plate 11 of the frame 1 facing the top plate 12, so that the roller of the film supply body 312 is kept parallel to the bottom plate 11, supporting the film supply body 312 and preventing the film supply body 312 from shifting.

[0053] The support frame 311 includes a first support 3111 and a second support 3112, which are parallel to each other and located at opposite ends of the film supply section 31 along a third direction. The first support 3111 is plate-shaped and is connected to both the bottom plate 11 and the top plate 12; the second support 3112 is connected to the bottom plate 11. The first support 3111 has a first through hole (not shown in the figure), and the second support 3112 has a second through hole 3114 opposite to the first through hole. The first through hole and the second through hole 3114 are the same size, and their center extension lines are on the same straight line. A first roller 3121 is located between the first support 3111 and the second support 3112, and is rotatably connected to the support frame 311 through the first through hole and the second through hole 3114 to support the first roller 3121. This arrangement ensures that the roller shaft of the first roller 3121 remains parallel to the bottom plate 11, thereby ensuring that the film pulled out from the film supply section 31 remains horizontal. At the same time, this design can support the first roller 3121 and enable the first roller 3121 to rotate, while also preventing the first roller 3121 from shifting and maintaining stable rotation.

[0054] The film supply body 312 includes a first roller 3121, the axis of which is parallel to the base plate 11. The surface of the first roller 3121 is wound with a film to be stretched and cut. One end of the first roller 3121 is rotatably connected to a first through hole, and the other end is rotatably connected to a second through hole 3114. Therefore, the first roller 3121 can rotate around its axis on the support frame 311. In this embodiment, the first roller 3121 preferably rotates counterclockwise so that when the film leaves the first roller 3121, it remains as parallel as possible to the base plate 11 for easy cutting.

[0055] Figure 4 A structural diagram of the film-pressing section and the film-clamping section of the film-applying device in this embodiment is shown.

[0056] like Figure 4 As shown, in some embodiments, the clamping portion 32 includes a first slide rail (not shown) and a clamping plate 325 that are slidably connected. The first slide rail extends along the second direction Y so that the clamping plate 325 slides along the second direction Y. The clamping plate 325 includes a first clamping plate 3251 and a second clamping plate 3252. The first clamping plate 3251 and the second clamping plate 3252 are arranged opposite to and parallel to each other in the first direction X, and at least one of the first clamping plate 3251 and the second clamping plate 3252 can move closer to or further away from the other along the first direction X.

[0057] Specifically, the first clamping plate 3251 and the second clamping plate 3252 are parallel to each other and parallel to the base plate 11. The first clamping plate 3251 and the second clamping plate 3252 are of corresponding size and shape, both being elongated sheets. In addition, besides being able to move synchronously along the second direction Y on the first slide rail, the first clamping plate 3251 and the second clamping plate 3252 can also be separated by a distance along the first direction X. When a distance is created between the two plates along the first direction X, that is, when the clamping plate 325 is in the loose state, the film pulled out from the film supply section 31 can fall between the two plates, so that the clamping plate 325 can clamp this part of the film; when the two plates are close together along the first direction X, the film pulled out from the film supply section 31 is tightly clamped by the two plates. At this time, the film clamping section 32 can move along the second direction Y, so that the film pulled out from the film supply section 31 is stretched out along the second direction Y, and at the same time, it drives the first roller 3121 of the film supply section 31 to rotate counterclockwise.

[0058] In some embodiments, the first slide rail includes a first fixing plate 321 and a second fixing plate 323 extending along the second direction Y, the first fixing plate 321 and the second fixing plate 323 being disposed opposite to each other in the third direction Z; the first slide rail also includes a first connecting block 322 and a second connecting block 324, the first connecting block 322 and the second connecting block 324 respectively connecting the two ends of the first clamping plate 3251 and the two ends of the second clamping plate 3252 in the third direction Z, and being movably connected to the two ends of at least one of the first clamping plate 3251 and the second clamping plate 3252, the first connecting block 322 and the second connecting block 324 being provided with telescopic driving members, the telescopic driving members being used to move the first clamping plate 3251 and the second clamping plate 3252 closer to or further away from the other in the first direction X.

[0059] Specifically, the first slide rail includes a first fixing plate 321, a first connecting block 322, a second fixing plate 323, and a second connecting block 324. The first fixing plate 321 and the second fixing plate 323 are arranged opposite to each other and parallel to the base plate 11. The first fixing plate 321 is fixedly connected to the frame 1, and can be fixedly connected to the frame 1 using detachable fasteners. The first fixing plate 321 and the second fixing plate 323 have the same shape and size, and their overall shape is not limited. They can be cubes, for example, with their longest side extending along the second direction Y, the second longest side along the first direction X, and their shortest side extending along the third direction Z. The surface of the first fixing plate 321 below the first direction X is parallel to the base plate 11.

[0060] The first fixing plate 321 and the first connecting block 322 cooperate with each other, and the second fixing plate 323 and the second connecting block 324 cooperate with each other. The two sets are symmetrically arranged along the third direction Z to stabilize and support the clamping plate 325, thereby preventing the clamping plate 325 from tilting.

[0061] A third through hole 3221 extends through the first connecting block 322, with the through hole 3221 extending in the second direction Y. Simultaneously, the first fixing plate 321 can be inserted into the third through hole 3221, and the shape and size of the cross-section of the third through hole 3221 correspond to the cross-section of the first fixing plate 321, allowing the first connecting block 322 to slide on the first fixing plate 321. A first shaft 3222 is located on the side of the first connecting block 322 facing the clamping plate 325 and is connected to the first clamping plate 3251 and the second clamping plate 3252. The first shaft 3222 extends along the first direction X and can extend and retract along the first direction X. When the first shaft 3222 extends or retracts, the first clamping plate 3251 or the second clamping plate 3252 also moves along the first shaft 3222.

[0062] Correspondingly, a fourth through hole 3241 is formed through the second connecting block 324, with the through hole 3241 extending in the second direction Y. Simultaneously, the second fixing plate 323 can be inserted into the fourth through hole 3241, and the shape and size of the cross-section of the fourth through hole 3241 correspond to the cross-section of the second fixing plate 323, allowing the second connecting block 324 to slide on the second fixing plate 323. The second shaft 3242 is located on the side of the second connecting block 324 facing the clamping plate 325 and is connected to the first clamping plate 3251 and the second clamping plate 3252. The second shaft 3242 extends along the first direction X and can extend and retract along the first direction X. When the second shaft 3242 extends or retracts, the first clamping plate 3251 or the second clamping plate 3252 also moves along the second shaft 3242.

[0063] Furthermore, the clamping part 32 also includes a second driving member, which is disposed on one side of the frame 1. Specifically, the output end of the second driving member is connected to the first connecting block 322 or the second connecting block 324. In this embodiment, the second driving member is preferably connected to the first connecting block 322, which drives the first connecting block 322 to reciprocate along the second direction Y, thereby driving the clamping plate 325 and the second connecting block 324 to reciprocate along the second direction Y.

[0064] The clamping plate 325 is used to clamp the film provided by the film supply section 31, so that the film is stretched onto the workpiece to be coated. The clamping plate 325 is connected to the first shaft 3222 and the second shaft 3242, and as the first shaft 3222 and the second shaft 3242 move along the first direction X, the first shaft 3222 and the second shaft 3242 maintain equal extension and contraction, so that the first clamping plate 3251 and the second clamping plate 3252 always remain parallel to the base plate 11. The first shaft 3222 and the second shaft 3242 each include a first end and a second end. The first end is located on the upper side of the first shaft 3222 and the second shaft 3242 along the first direction X, and the second end is located on the lower side of the first shaft 3222 and the second shaft 3242 along the first direction X. The first shaft 3222 and the second shaft 3242 can extend and retract at the same time as the first end and the second end, or only one end of the first end and the second end can extend and retract while the height of the other end remains unchanged. Preferably, in this embodiment, the height of the first end remains unchanged while the second end extends and retracts. This design structure is simple and works in conjunction with the design of the clamping plate 325, thereby clamping the film more stably.

[0065] In some embodiments, the bonding component 4 further includes a connecting portion 42, which includes a second slide rail 424 and a first connecting portion 422. One end of the first connecting portion 422 is movably connected to the pressing portion 41, and the other end of the first connecting portion 422 is slidably connected to the second slide rail 424. The second slide rail 424 is disposed on the top plate 12 and extends along the second direction Y to support the bonding component 4. One end of the pressing portion 41 is movably connected to the top plate 12 through the first connecting portion 422, and the first connecting portion 422 can drive the pressing portion 41 in the first direction X so that the other end of the pressing portion 41 approaches or moves away from the surface of the workpiece.

[0066] The second slide rail 424 is disposed on the top plate 12 and extends along the second direction Y to support the bonding component 4; the film pressing part 41 is a cylindrical pressure roller that can rotate around the axis of the pressure roller and slide along the second direction Y on the second slide rail 424, thereby enabling rolling to flatly press the film to be attached onto the surface of the workpiece.

[0067] Specifically, the first connecting part 422 is located entirely on the side of the pressing part 41 facing away from the workpiece in the first direction X. The first connecting part 422 is rotatably connected to the pressing part 41, so that the pressing part 41 can be rotatably suspended inside the frame 1. The first connecting part 422 can extend and retract along the first direction X, thereby driving the pressing part 41 to move along the first direction X.

[0068] The connecting portion 42 also includes a second connecting portion 423. The bottom of the second connecting portion 423 is fixedly connected to the top of the first connecting portion 422. The second connecting portion 423 is higher than the top plate 12, and a fifth through hole 4231 is formed inside it, which extends through the second connecting portion 423 along the second direction Y. The cross-sectional shape of the through hole is not limited, but it is preferably circular to facilitate installation and sliding. The second connecting portion 423 is slidably connected to the second slide rail 424, so that the second connecting portion 423 can move along the second direction Y, thereby driving the first connecting portion 422 to move along the second direction Y, and further driving the pressing portion 41 to move along the second direction Y. The second slide rail 424 is fixedly disposed on the surface of the top plate 12 to support the pressing component 4.

[0069] Furthermore, the clamping component 4 also includes a third driving member 52, which is disposed above the frame 1. The output end of the third driving member 52 is connected to the second connecting part 423 and supports the second slide rail 424, so that the first connecting part 422 moves along the first direction X and the second connecting part 423 slides on the second slide rail 424 along the second direction Y. In addition, a recess is formed on the side wall of the third driving member 52 in the second direction Y. The shape and size of the cross-section of the recess correspond to the cross-section of the second slide rail 424, so that one end of the second slide rail 424 is fixed in the recess. The second slide rail 424 is cylindrical in shape, with its axis in the second direction Y. The shape and size of its cross-section correspond to the cross-section of the through hole of the second connecting part 423, so that the second connecting part 423 can slide smoothly on the second slide rail 424.

[0070] Through the cooperation of the pressing part 41 with the first connecting part 422, the second connecting part 423 and the second slide rail 424, the pressing part 41 can move in both the first direction X and the second direction Y.

[0071] The film pressing section 41 can be pressed using a roller, a slanted spatula, or a flat plate. This embodiment preferably uses the roller pressing method, which effectively prevents air bubbles from forming between the film and the surface of the workpiece to be coated, and minimizes potential damage to the film during the coating process.

[0072] In some embodiments, the film-applying device further includes a separating component 5 disposed within the receiving space and located between the film supply section 31 and the film clamping section 32 in the second direction Y. The separating component 5 includes a cutting section 51 and a pressing section. In the first direction X, one end of the cutting section 51 is connected to the top plate 12, and the other end of the cutting section 51 faces the surface of the workpiece. The cutting section 51 is movable in the first direction X to cut the film to be applied. In the first direction X, one end of the pressing section is connected to the top plate 12, and the other end of the pressing section faces the surface of the workpiece and is provided with an adsorption device for adsorbing the film to be applied.

[0073] Specifically, such as Figure 1b As shown, the separating component 5 includes a shearing part 51 and a pressing part. In this embodiment, the pressing part includes a first frame 53 and a second frame 54. The shearing part 51 has a blade 511 at one end facing the workpiece in the first direction X for cutting the film; the other end of the shearing part 51 away from the workpiece in the first direction X is movably connected to the top plate 12 and can move in the first direction X; the first frame 53 and the second frame 54 are respectively connected to the top plate 12; the first frame 53 and the second frame 54 are parallel to each other, and the second frame 54 has a second frame base plate 541 at one end facing the workpiece in the first direction X. An adsorption device is provided on the second frame base plate 541 for adsorbing the film.

[0074] The shearing part 51 may include a first end and a second end. The first end is the end of the shearing part 51 facing the workpiece in the first direction X, and the second end is the end of the shearing part 51 connected to the top plate 12 in the first direction X.

[0075] The first end of the shearing part 51 passes through the hollow part of the top plate 12, and the second end is connected to the top plate 12. The shearing part 51 can move relative to the top plate 12 along the first direction X. The first end of the shearing part 51 is provided with a blade 511. The blade 511 has a cutting edge direction parallel to the first direction X and is used to cut the film.

[0076] Furthermore, the separating component 5 also includes a fourth driving member (not shown in the figure). For example, the fourth driving member is fixedly disposed on the upper surface of the top plate 12 in the first direction X. The output end of the fourth driving member is connected to the shearing part 51 in the first direction X to drive the shearing part 51 to reciprocate along the first direction X.

[0077] The first frame 53 and the second frame 54 respectively penetrate the hollowed-out portion of the top plate 12 and are driven and connected to the output end of the fourth driving component. The first frame 53 and the second frame 54 are perpendicular to the top plate 12 and parallel to each other, respectively arranged on both sides of the shearing part 51 along the first direction X, and maintaining a certain distance from the shearing part 51 so that the shearing part 51 can easily perform the shearing operation. The bottom of the second frame 54 is provided with a second frame base plate 541. The second frame base plate 541 is generally in the shape of a thin sheet, and the length of the second frame base plate 541 along the third direction Z is greater than the length of the main body of the second frame 54 along the third direction Z. An adsorption device is provided on the second frame base plate 541 for adsorbing the film.

[0078] Figure 6 A schematic diagram of the clamping notch of the clamping plate and the clamping protrusion of the second frame base plate is shown.

[0079] like Figure 6 As shown, in some embodiments, in the second direction Y, one of the clamping plate 325 and the pressing part is provided with a clamping notch 92, and the other is provided with a clamping protrusion 91. The clamping notch 92 and the clamping protrusion 91 correspond to each other, so that the clamping plate 325 and the pressing part can cooperate with each other to clamp the film to be attached.

[0080] Specifically, the clamping plate 325 includes a first clamping plate 3251 and a second clamping plate 3252. Both the first clamping plate 3251 and the second clamping plate 3252 are provided with clamping notches 92 in opposite directions along the second direction Y. The second base plate 541 is provided with clamping protrusions 91 along the second direction Y. The clamping notches 92 of the first clamping plate 3251 and the second clamping plate 3252 correspond to each other with the clamping protrusions 91 of the second base plate 541, so that the clamping notches 92 of the first clamping plate 3251 and the second clamping plate 3252 and the clamping protrusions 91 of the second base plate 541 can be inserted into each other.

[0081] The first clamping plate 3251 and the second base plate 541 have the same thickness along the first direction X, and are both on the same horizontal plane. The first clamping plate 3251 has a clamping notch 92 in the opposite direction to the second direction Y, and the second base plate 541 has a clamping protrusion 91 along the second direction Y. The positions, sizes, and numbers of the clamping notches 92 and the clamping protrusions 91 correspond to each other. The clamping notches 92 and the clamping protrusions 91 have the same thickness along the first direction X, which is the same as the thickness of the first clamping plate 3251 and the second base plate 541 along the first direction X. The shapes of the clamping notches 92 and the clamping protrusions 91 are not limited, but are preferably rectangular to facilitate stamping manufacturing.

[0082] When the first clamping plate 3251 and the second base plate 541 are in close contact, the clamping notch 92 of the first clamping plate 3251 and the clamping protrusion 91 of the second base plate 541 can correspond exactly, so that the two can be inserted into each other along the second direction Y.

[0083] Figure 5a - Figure 5f An example diagram of pulling a film according to an embodiment of this disclosure is shown.

[0084] like Figure 5a As shown, after the previous film application operation is completed, the film pulling component 3 starts working. At this time, in order to separate the part of the film that has been applied to the workpiece surface from the part that has not been applied to the workpiece surface, the separation component 5 has already cut the film pulled out from the film supply section 31 in the previous film application operation. Therefore, after the cut, the film 8 extended from the film supply section 31 is only located in the opposite direction of the first direction X of the separation component 5. In the second direction, the extended film 8 slightly exceeds the second direction Y sidewall of the second frame base plate 541 of the second frame 54, and its end 81 away from the film supply section is attracted by the second frame base plate 541 of the second frame 54.

[0085] Then, the first connecting block 322 and the second connecting block 324 of the clamping section 32 move in opposite directions along the second direction Y, causing the clamping plate 325 to move in the opposite direction of the second direction Y. The first clamping plate 3251 of the clamping plate 325 is at the same horizontal height and aligned with the second frame base plate 541. As the clamping plate 325 moves, at this time, as Figure 5b As shown, the first clamping plate 3251 and the second base plate 541 are interlocked.

[0086] As the clamping plate 325 moves further, such as Figure 5c As shown, when the clamping notch 92 of the first clamping plate 3251 is in full contact with the clamping protrusion 91 of the second base plate 541, the clamping notch 92 of the first clamping plate 3251 and the clamping protrusion 91 of the second base plate 541 engage with each other. At this time, the clamping plate 325 stops moving in the second direction Y.

[0087] Next, the clamping plate 325 begins to clamp the film 8. At this time, the second clamping plate 3252 of the clamping plate 325 begins to move in the first direction X, approaching the first clamping plate 3251. After a period of movement, as... Figure 5d As shown, at this time, the first clamping plate 3251 and the second clamping plate 3252 are pressed tightly together, thereby completely clamping the end 81 of the film 8 away from the film supply section.

[0088] After the first clamping plate 3251 and the second clamping plate 3252 stably clamp the film 8, the second base plate 541 stops adsorbing the film 8, and the clamping plate 325 begins to move in the second direction Y. Figure 5e As shown, at this time, as the clamping plate 325 moves in the second direction Y, the first clamping plate 3251 and the second clamping plate 3252 also move in the second direction Y. The end 81 of the clamped film 8 away from the film supply part also moves in the second direction Y due to the drag of the clamping plate 325, thereby causing the film 8 to stretch in the second direction Y, as shown. Figure 5f As shown, this allows the film to extend onto the workpiece with the film attached in the first direction X.

[0089] Compared to not using a concave-convex structure, using the concave-convex structure described above allows the first clamping plate 3251 and the second clamping plate 3252 to clamp the film over a longer distance, thus improving the reliability of the film pulling operation and preventing the film from slipping between the two clamping plates due to an excessively short clamping distance.

[0090] In some embodiments, the film application device further includes a detection component 6 disposed on the top plate 12, the detection end of the detection component 6 facing the workpiece along the first direction X, for detecting the flatness of the workpiece.

[0091] Specifically, after the film is applied to the surface of the workpiece in the first direction X, the application result can be inspected. Manual inspection and classification are possible, but automated methods, such as CCD inspection systems, are preferred. CCD inspection (Charge Coupled Device) is a non-contact inspection technology that utilizes charge-coupled devices and is widely used in quality inspection in industrial automation. The working principle of CCD inspection is to convert the target object into an image signal using a CCD image sensor, which is then digitized by an image processing system to achieve automated inspection and recognition.

[0092] In the lithium battery manufacturing process, CCD inspection can be used to detect the battery's size, shape, and surface defects, such as burrs, contamination, and scratches. The CCD inspection system captures images of the battery using a high-resolution camera, and then uses image processing algorithms to analyze battery characteristics, such as the alignment of the battery electrodes, the integrity of the battery casing, and the smoothness of the battery surface.

[0093] In this embodiment, the detection component 6 is disposed on the top plate 12 of the frame 1 and extends through the top plate 12, with its first direction X opposite to that of the supporting component 2. After the surface of the workpiece to be coated in the first direction X is coated with film, the detection component 6 can be used to detect the coating result.

[0094] Specifically, the detection component 6 can be a high-resolution camera that captures images and analyzes them using a CCD detection system to determine whether the film application is qualified. Based on this determination, the film-applied workpiece can be processed automatically. For example, qualified film-applied workpieces can be transported to a designated location via a conveyor belt, while unqualified film-applied workpieces can be transported to another designated location via a conveyor belt. This reduces the manpower required for the detection, sorting, and transportation of film-applied workpieces.

[0095] A film applicator is provided, comprising a plurality of hoppers and a film applicator as described in any one of the embodiments disclosed herein, wherein at least one of the hoppers is used to provide the workpiece to which the film is to be applied to the film applicator, and at least one of the hoppers is used to collect the workpiece to which the film has been applied by the film applicator.

[0096] Specifically, the laminating machine may include multiple hoppers, respectively for providing workpieces to be laminated and collecting workpieces with laminated films, and the multiple hoppers may be arranged on opposite sides of the laminating device to facilitate workpiece transportation. The laminating machine may include the workpiece laminating apparatus disclosed herein. For example, the laminating device of the laminating machine may employ a roller pressing method to press the film onto the workpiece to be laminated, and the pressing part 41 may be a cylindrical roller, thereby effectively preventing air bubbles from forming between the film and the surface of the workpiece to be laminated, and minimizing potential damage to the film during the laminating operation. For example, the laminating device of the laminating machine may include a detection component 6 disposed on the top plate 12. The detection component 6 uses a CCD detection method to first photograph the battery surface to acquire an image, then performs image processing on the acquired image, and finally obtains a conclusion through analysis and calculation, thus automating the battery surface detection.

[0097] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A film-applying device for applying film to the surface of a workpiece, comprising a support component (2), a film-pulling component (3), and an applicating component (4), characterized in that, The supporting component (2) is used to support the workpiece in the first direction (X); The film-pulling component (3) is disposed on the side of the workpiece away from the supporting component (2) in the first direction (X). The film-pulling component (3) includes a film-supplying part (31) and a film-clamping part (32). The film-supplying part (31) and the film-clamping part (32) are respectively disposed opposite to each other in the second direction (Y). The film-supplying part (31) is used to provide the workpiece with a film to be attached. The film-clamping part (32) can move in the second direction (Y) to approach or move away from the film-supplying part (31) and clamp the film to be attached provided by the film-supplying part (31), so that the film to be attached extends on the surface of the workpiece. The bonding component (4) is disposed on the side of the film to be bonded that is away from the workpiece in the first direction (X), and can move in the first direction (X) and the second direction (Y) to press the film to be bonded flat onto the surface of the workpiece. The first direction (X) and the second direction (Y) are perpendicular to each other, and the first direction (X) is perpendicular to the transport direction of the film to be attached, while the second direction (Y) is parallel to the transport direction of the film to be attached.

2. The film-applying device according to claim 1, characterized in that, The system includes a frame (1), which includes a base plate (11) and a top plate (12). The base plate (11) and the top plate (12) are arranged opposite to each other in the first direction (X), and a receiving space is formed between the base plate (11) and the top plate (12). The supporting component (2) The bottom plate (11) is provided with the fastening component (4), the top plate (12) is provided with the fastening component (4), and the membrane stretching component (3) is provided within the accommodating space; The bonding component (4) includes a film pressing part (41). In the first direction (X), one end of the film pressing part (41) is movably connected to the top plate (12), and the other end of the film pressing part (41) faces the surface of the workpiece. The film pressing part (41) can move in the first direction (X) to approach or move away from the surface of the workpiece, and can slide in the second direction (Y) to press the film to be attached flatly onto the surface of the workpiece.

3. The film-applying device according to claim 2, characterized in that, The film supply unit (31) includes a support frame (311) and a film supply body (312); The support frame (311) is disposed on the base plate (11) and includes a first support (3111) and a second support (3112). The first support (3111) and the second support (3112) are respectively disposed opposite to each other in a third direction (Z). The third direction (Z) is perpendicular to the first direction (X) and the second direction (Y) respectively. The film supply body (312) includes a first roller (3121), the two ends of the first roller (3121) are rotatably connected to the first support (3111) and the second support (3112) respectively, and the film to be attached is wrapped around the outer peripheral surface of the first roller (3121). The first roller (3121) rotates around the axis to transport the film to be attached.

4. The film-applying device according to claim 3, characterized in that, The clamping part (32) includes a first slide rail and a clamping plate (325) that are slidably connected. The first slide rail extends along the second direction (Y) so that the clamping plate (325) slides along the second direction (Y). The clamping plate (325) includes a first clamping plate (3251) and a second clamping plate (3252), the first clamping plate (3251) and the second clamping plate (3252) are arranged opposite to and parallel to each other in the first direction (X), and at least one of the first clamping plate (3251) and the second clamping plate (3252) can move closer to or further away from the other in the first direction (X).

5. The film-applying device according to claim 4, characterized in that, The first slide rail includes a first fixing plate (321) and a second fixing plate (323) extending along the second direction (Y), and the first fixing plate (321) and the second fixing plate (323) are disposed opposite to each other in the third direction (Z); The first slide rail further includes a first connecting block (322) and a second connecting block (324). In the third direction (Z), the first connecting block (322) and the second connecting block (324) are respectively connected to the two ends of the first clamping plate (3251) and the two ends of the second clamping plate (3252), and are movably connected to the two ends of at least one of the first clamping plate (3251) and the second clamping plate (3252). The first connecting block (322) and the second connecting block (324) are provided with telescopic driving members. The telescopic driving members are used to move the first clamping plate (3251) and the second clamping plate (3252) closer to or further away from the other in the first direction (X).

6. The film-applying device according to claim 2, characterized in that, The fastening component (4) further includes a connecting part (42), which includes a second slide rail (424) and a first connecting part (422). One end of the first connecting part (422) is movably connected to the pressing part (41), and the other end of the first connecting part (422) is slidably connected to the second slide rail (424). The second slide rail (424) is disposed on the top plate (12) and extends along the second direction (Y) to support the fastening component (4). One end of the pressing part (41) is movably connected to the top plate (12) through the first connecting part (422), and the first connecting part (422) can drive the pressing part (41) in the first direction (X) so that the other end of the pressing part (41) approaches or moves away from the surface of the workpiece.

7. The film-applying device according to claim 5, characterized in that, It also includes a separating component (5), which is disposed in the receiving space and located between the film supply part (31) and the film clamping part (32) in the second direction (Y). The separating component (5) includes a shearing part (51) and a pressing part. In the first direction (X), one end of the shearing part (51) is connected to the top plate (12), and the other end of the shearing part (51) faces the surface of the workpiece. The shearing part (51) is movable in the first direction (X) to cut the film to be attached. In the first direction (X), one end of the pressing part is connected to the top plate (12), and the other end of the pressing part faces the surface of the workpiece and is provided with an adsorption device, which is used to adsorb the film to be attached.

8. The film-applying device according to claim 7, characterized in that, In the second direction (Y), one of the clamping plate (325) and the pressing part is provided with a clamping notch (92), and the other is provided with a clamping protrusion (91). The clamping notch (92) and the clamping protrusion (91) correspond to each other, so that the clamping plate (325) and the pressing part can cooperate with each other to clamp the film to be attached.

9. The film-applying device according to claim 2, characterized in that, It also includes a detection component (6), which is disposed on the top plate (12). The detection end of the detection component (6) is directed toward the workpiece along the first direction (X) and is used to detect the flatness of the workpiece.

10. A film applicator, characterized in that, The film applicator includes multiple hoppers and a film applicator as described in any one of claims 1-9, wherein at least one of the hoppers is used to provide the workpiece to be applicated with film to the film applicator, and at least one of the hoppers is used to collect the workpiece to which film has been applicated by the film applicator.

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