Synchronization device, film coating equipment and film coating method

Abstract

The present application provides a synchronization device, film coating equipment, and film coating method. The synchronization device of the present application includes a clamping mechanism, a first drive mechanism, a second drive mechanism, and a pressure roller mechanism; the first drive mechanism is connected to the clamping mechanism; the second drive mechanism is in transmission connection with the first drive mechanism, and is used to drive the first drive mechanism and the clamping mechanism to rotate with the clamping mechanism as the rotation center; the pressure roller mechanism is in transmission connection with the second drive mechanism. The synchronization device of the present application drives the clamping mechanism to pull the bottom film and the pressure roller mechanism to press the narrow side film simultaneously through the second drive mechanism, so that there is no interference between the bottom film and the pressure roller mechanism, reducing the film coating processing sequence and improving the film coating efficiency. In addition, there is no need to set up an additional drive to drive the film pressing mechanism, which reduces the complexity of the structure and the manufacturing cost.

Description

Technical Field

[0001] The present application relates to the field of film coating technology, and in particular to a synchronization device, a film coating device and a film coating method. Background Art

[0002] The process of wrapping the battery cell with insulating film is particularly important in the battery production process. The battery cell wrapping work needs to go through the steps of pasting the wide side film, narrow side film, top film and bottom film of the battery cell in sequence. Generally, the wrapping machine does not perform the "two-character" processing on the blue film of the battery cell after pasting the wide side film, but directly proceeds to apply the narrow side film, top film and bottom film. However, this wrapping method easily causes the blue film pasted on the narrow side and top and bottom surfaces of the battery cell to be filled with bubbles, resulting in poor wrapping effect. After the "two-character" processing is performed on the bottom film of the battery cell, the battery cell with the "two-character" bottom film needs to be transported to the next station for wrapping with the narrow side film. During the wrapping process of the narrow side film, the bottom film will interfere with the pressure roller used to roll the narrow side film, affecting the bottom film. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a synchronization device, a coating device and a coating method, which can solve at least one of the above-mentioned technical problems, reduce the coating processing sequence, and improve the coating efficiency and coating effect.

[0004] A first aspect of an embodiment of the present application provides a synchronization device, including:

[0005] Clamping mechanism;

[0006] a first driving mechanism connected to the clamping mechanism;

[0007] A second driving mechanism is transmission-connected to the first driving mechanism and is used to drive the first driving mechanism together with the clamping mechanism to rotate with the clamping mechanism as the rotation center; and a pressure roller mechanism is transmission-connected to the second driving mechanism.

[0008] In one embodiment, the second driving mechanism includes:

[0009] A rotating drive body;

[0010] An L-shaped connecting rod connects the rotary drive member body and the first drive mechanism.

[0011] In one embodiment, the pressing roller mechanism includes:

[0012] First screw;

[0013] a first pressing roller, movably connected to the first screw;

[0014] a second screw connected to the first screw;

[0015] a second pressing roller, movably connected to the second screw;

[0016] The first screw end and the second screw end are connected and coaxially arranged, and the thread directions of the first screw and the second screw are opposite, so that the second driving mechanism drives the first pressure roller and the second pressure roller to move closer to and separate from each other through the transmission member.

[0017] In one embodiment, the clamping mechanism includes:

[0018] A first clamping plate is fixedly mounted on the first driving mechanism; and

[0019] The second clamping plate, the first driving mechanism is connected to the second clamping plate, drives the second clamping plate to move closer to or away from the first clamping plate to perform a clamping operation.

[0020] A second aspect of the embodiments of the present application provides a film wrapping device, comprising at least one cutting device and at least one synchronization device as described in any one of the first aspects of the embodiments of the present application.

[0021] In one embodiment, the cutting device includes:

[0022] a third driving mechanism, arranged opposite to the pressing roller mechanism;

[0023] at least one cutter connected to the third drive mechanism;

[0024] The clamping mechanism is located between the third driving mechanism and the pressing roller mechanism.

[0025] In one embodiment, the cutting device further comprises:

[0026] a first pressing frame, provided on the third driving mechanism, wherein the cutter is located in the first pressing frame;

[0027] a fourth driving mechanism, located on the same side as the pressing roller mechanism and opposite to the third driving mechanism;

[0028] The second pressing frame is arranged on the fourth driving mechanism, and the second pressing frame corresponds to the first pressing frame. The third driving mechanism drives the first pressing frame, and the fourth driving mechanism drives the second pressing frame, so that the first pressing frame and the second pressing frame are clamped and fixed close to each other, and a sliding groove for guiding the cutter is formed between the first pressing frame and the second pressing frame and the clamping mechanism.

[0029] In one embodiment, the device further includes: a fifth driving mechanism connected to the fourth driving mechanism, and configured to drive the fourth driving mechanism to move to a position corresponding to the third driving mechanism.

[0030] In one embodiment, the first pressing frame is disposed on the third driving mechanism via a spring assembly.

[0031] A third aspect of the embodiments of the present application provides a coating method, using any coating device provided in the second aspect of the embodiments of the present application, comprising the following steps:

[0032] Apply the packaging film to the wide side and bottom of the battery cell;

[0033] Controlling the clamping mechanism to clamp the bottom film by the first driving mechanism;

[0034] The bottom film is cut by the cutting device;

[0035] The first driving mechanism and the clamping mechanism are driven by the second driving mechanism to rotate with the clamping mechanism as the rotation center, and the bottom film after the cutting process is pulled by the clamping mechanism;

[0036] The second driving mechanism drives the pressing roller mechanism to press the wide side film through the transmission member, so that the wide side film is attached to the narrow side of the battery cell.

[0037] The technical solution provided by the above embodiment of the present application uses a second drive mechanism to simultaneously drive the clamping mechanism to pull the bottom film and the pressing roller mechanism to press the narrow side film, so that there is no interference between the bottom film and the pressing roller mechanism. While the bottom film is being pulled, the pressing roller mechanism simultaneously starts the film pressing process, which reduces the film coating processing sequence and improves the film coating efficiency. In addition, there is no need to set up an additional drive member to drive the film pressing mechanism, which reduces the complexity of the structure and the manufacturing cost. The film coating equipment of the present application can also achieve the coating of the wide side film and the top and bottom films of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 A schematic structural diagram of a coated battery cell provided in one embodiment of the present application;

[0040] Figure 2 A schematic structural diagram of a membrane encapsulation system according to an embodiment of the present application;

[0041] Figure 3This is a schematic diagram of the state of the battery cell after being covered with the bottom mask and the wide side mask according to one embodiment of the present application;

[0042] Figure 4 A schematic diagram of the state of the cell cutting process provided by an embodiment of the present application;

[0043] Figure 5 This is a schematic diagram of a battery cell provided in one embodiment of the present application after being covered with a narrow side film;

[0044] Figure 6 This is a schematic diagram of the state of the battery cell provided by one embodiment of the present application after being covered with top and bottom films;

[0045] Figure 7 A schematic structural diagram of a film coating device provided in one embodiment of the present application;

[0046] Figure 8 The structural state of the synchronization device provided in one embodiment of the present application Figure 1 ;

[0047] Figure 9 A schematic diagram of a film clamping state of a clamping mechanism provided in one embodiment of the present application;

[0048] Figure 10 The structural state of the synchronization device provided in one embodiment of the present application Figure 2 ;

[0049] Figure 11 A schematic diagram of a film-pulling state of a clamping mechanism provided in one embodiment of the present application;

[0050] Figure 12 A schematic structural diagram of a cutting device provided in one embodiment of the present application.

[0051] Reference numerals:

[0052] 1-battery cell; 11-wide side; 12-narrow side; 13-bottom surface; 14-top surface; 2-blue film; 3-film coating system; 31-platform; 32-film loading equipment; 33-pretreatment equipment; 34-film coating equipment; 35-post-treatment equipment; 300-synchronizing device; 310-clamping mechanism; 311-first clamping plate; 312-second clamping plate; 320-first driving mechanism; 321-first cylinder; 330-second driving mechanism; 331-rotating driving member body; 3311-motor; 332-L-type connecting rod; 333-support member; 340-pressing roller mechanism; 3 41-first screw; 342-first pressure roller; 3421-first mounting shaft seat; 3422-first threaded hole; 343-second screw; 344-second pressure roller; 3441-second mounting shaft seat; 3442-second threaded hole; 400-cutting device; 410-third driving mechanism; 411-second cylinder; 420-cutter; 430-first pressure frame; 440-fourth driving mechanism; 441-third cylinder; 450-second pressure frame; 460-slide; 470-spring assembly; 480-fifth driving mechanism; 481-fourth cylinder; 500-transmission member. DETAILED DESCRIPTION

[0053] The terms "first", "second", "third", etc. are only used to distinguish and describe, and do not indicate the order of arrangement, nor can they be understood as indicating or implying relative importance.

[0054] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0055] In the description of this application, it should be noted that the terms "inside", "outside", "left", "right", "up", "down", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0056] In the description of this application, unless otherwise clearly specified and limited, the terms "set", "install", "connected" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the internal parts of two elements.

[0057] The technical solution of this application will be clearly and completely described below with reference to the accompanying drawings.

[0058] Please refer to Figure 1 The battery cell 1 is a rectangular structure, including two wide sides 11, two narrow sides 12, a bottom 13, and a top 14. During battery manufacturing, a PET blue film 2 is typically used as insulation between the battery cells 1. The cell 1 coating process requires applying the blue film 2 to the two wide sides 11, two narrow sides 12, bottom 13, and top 14 of the cell.

[0059] Please refer to Figure 2 , which is a structural diagram of the coating system 3 provided in one embodiment of the present application, through which the coating work of the battery cell 1 is completed. The coating system 3 includes a platform 31, a coating device 32, a pre-treatment device 33, a coating device 34 and a post-treatment device 35. The coating device 32, the pre-treatment device 33, the coating device 34 and the post-treatment device 35 are arranged on the platform 31 in sequence. The entire coating process is as follows: First, the blue film 2 is transported to the pre-treatment device 33 through the coating device 32, and a whole blue film 2 is attached to the two wide sides 11 and the bottom 13 of the battery cell 1 through the pre-treatment device 33 (similar to wrapping a book cover), and a certain length of the blue film 2 is reserved on the wide sides 11 and the bottom 13 (please refer to Figure 3 ), the battery cell 1 with the wide side film and bottom film attached is transported to the film coating device 34 through the conveyor device, and the bottom film is cut by the film coating device 34 (please refer to Figure 4 ), then apply film to the narrow side 12 of the battery cell 1 (please refer to Figure 5 ), after the narrow side 12 is coated, the cell 1 is transported to the post-processing device 35 through the conveyor device, and the top surface 14 and bottom surface of the cell 1 are coated by the post-processing device 35 (please refer to Figure 6 ), the coated cell 1 is finally transported to the next operating platform via a dedicated conveyor device for further processing. In this embodiment, the specific structures of the coating device 32, pre-treatment device 33, and post-processing device 35 are not limited or elaborated upon. Their specific structures can refer to those in the prior art. The following details the specific structures of the coating device 34 and the synchronization device 300, as well as the method for coating the cell 1 using the coating device 34.

[0060] Please refer to Figure 7 , which is a structural diagram of a film wrapping device 34 provided in an embodiment of the present application. The film wrapping device 34 includes: at least one synchronization device 300 and at least one cutting device 400. For the specific structure of the synchronization device 300, please refer to Figure 8The synchronization device 300 includes: a clamping mechanism 310, a first drive mechanism 320, a second drive mechanism 330, and a pressing roller mechanism 340. The first drive mechanism 320 is connected to the clamping mechanism 310, and the second drive mechanism 330 is in transmission connection with the first drive mechanism 320. It is used to drive the first drive mechanism 320 and the clamping mechanism 310 to rotate around the clamping mechanism 310, thereby performing a film pulling operation. The second drive mechanism 330 is connected to the pressing roller mechanism 340 via a transmission member 500. When the second drive mechanism 330 drives the first drive mechanism 320 and the clamping mechanism 310 to rotate, it drives the pressing roller mechanism 340 to perform a film pressing operation. The clamping mechanism 310 and the pressing roller mechanism 340 are both located on the narrow side 12 of the battery cell 1.

[0061] In one embodiment, the clamping mechanism 310 includes a first clamping plate 311 and a second clamping plate 312. The first clamping plate 311 is fixed to the first drive mechanism 320, and the second clamping plate 312 is connected to the first drive mechanism 320. The first clamping plate 311 and the second clamping plate 312 can have a rectangular, circular, polygonal, or hollow frame structure. In this embodiment, the first clamping plate 311 and the second clamping plate 312 both have a rectangular structure.

[0062] Please refer to Figure 8 The first drive mechanism 320 can be a structure capable of driving the first clamping plate 311 and the second clamping plate 312 to reciprocate, thereby achieving the clamping and releasing operations. In this embodiment, the first drive mechanism 320 is a cylinder. To distinguish it from the following, the cylinder in this embodiment is referred to as the first cylinder 321. The piston rod of the first cylinder 321 is connected to the second clamping plate 312.

[0063] The second drive mechanism 330 includes: a rotary drive member body 331 and an L-shaped connecting rod 332, wherein the L-shaped connecting rod 332 connects the rotary drive member body 331 and the first drive mechanism 320. The rotary drive member body 331 can be a motor, a rotary cylinder, or other drive structure capable of achieving a linear drive effect. In one embodiment, the rotary drive member body 331 is a motor 3311, one end of the L-shaped connecting rod 332 is connected to the drive shaft of the motor 3311, and the other end of the L-shaped connecting rod 332 is connected to the first drive mechanism 320 via a support member 333. Specifically, the support member 333 is fixedly connected to the bottom of the first cylinder 321.

[0064] The pressure roller mechanism 340 includes a first screw 341, a first pressure roller 342, a second screw 343, and a second pressure roller 344. The end of the first pressure roller 342 is connected to a first mounting shaft seat 3421. The first mounting shaft seat 3421 has a first threaded hole 3422 that threadably engages with the first screw 341, allowing the first pressure roller 342 to be movably connected to the first screw 341. Similarly, the end of the second pressure roller 344 is connected to a second mounting shaft seat 3441. The second mounting shaft seat 3441 has a second threaded hole 3442 that threadably engages with the second screw 343, allowing the second pressure roller 344 to be movably connected to the second screw 343. The top end of the first screw 341 and the bottom end of the second screw 343 are connected and coaxially arranged.

[0065] In one embodiment, the first screw 341 is connected to the drive shaft of the motor 3311 through a conveyor belt. When the motor 3311 is running, the drive shaft of the motor 3311 drives the first screw 341 and the second screw 343 to rotate through the conveyor belt. Since the thread directions of the first screw 341 and the second screw 343 are opposite, the first pressure roller 342 and the second pressure roller 344 can approach and separate in opposite directions (both vertical directions).

[0066] During an operation, please refer to Figure 7-11 When the first cylinder 321 drives the second clamping plate 312 to approach the first clamping plate 311, the bottom film of the battery cell 1 is clamped (see Figure 8 、 Figure 9 ), the motor 3311 starts to work, and the drive shaft of the motor 3311 rotates clockwise (please refer to Figure 8 The L-shaped connecting rod 332 rotates clockwise, thereby driving the first clamping plate 311 and the second clamping plate 312 connected by the first cylinder 321 to pull the bottom film, and rotating with the contact end of the first clamping plate 311 and the second clamping plate 312 clamping the bottom film as the rotation center (please refer to Figure 10 The rotation direction arrow of the first cylinder 321, Figure 10 The rotation center axis is shown in the axis of the end of the first clamping plate 311 and the second clamping plate 312), and the bottom film is pulled to a position away from the narrow side of the battery cell 1 (please refer to Figure 10 and Figure 11 ,as well as Figure 7 It should be noted that the rotation axis requires the first clamping plate 311 and the second clamping plate 312 to be away from the edge of the first cylinder 321 and within the range between the edge where the clamped bottom film contacts the battery cell 1.

[0067] At the same time, the driving shaft of the motor 3311 drives the conveyor belt to rotate, thereby driving the first screw 341 to rotate clockwise, thereby driving the first pressure roller 342 movably connected to the first screw 341 to move upward, and the second screw 343 rotates clockwise, thereby driving the second pressure roller 344 movably connected to the second screw 343 to move downward (see Figure 10 ), the first pressing roller 342 and the second pressing roller 344 approach each other to coat the narrow side film attached to the battery cell 1. During this operation, due to the obtuse angle formed between the bottom film and the narrow side film, there is no interference between the bottom film and the first pressing roller 342 and the second pressing roller 344. The film-pulling operation of the bottom film by the clamping mechanism 310 and the film-pressing operation of the narrow side film by the pressing roller mechanism 340 can be completed simultaneously, reducing the film coating processing sequence and improving the coating efficiency.

[0068] It should be noted that before the synchronous device 300 of the present application is used to coat the narrow side film of the battery cell 1, the battery cell 1 has been subjected to the coating treatment of the pre-treatment device 33 in the coating system 3, that is, the battery cell 1 has completed the coating of the wide side film and the bottom film (please refer to Figure 3 ). In addition, the first pressing roller 342 and the second pressing roller 344 need to be as close to the narrow side surface 12 of the battery cell 1 as possible. Under the driving force of the motor 3311 driving the conveyor belt, the first pressing roller 342 and the second pressing roller 344 complete the coating of the film on the narrow side surface of the battery cell 1.

[0069] Please refer to Figure 12 , which is a schematic diagram of the structure of a cutting device 400 provided in one embodiment of the present application. The cutting device 400 includes: a third driving mechanism 410, at least one cutter 420, a first pressing frame 430, the cutter 420 is connected to the third driving mechanism 410, and the clamping mechanism 310 is located between the third driving mechanism 410 and the pressing roller mechanism 340 (please refer to Figure 7 ).

[0070] The third drive mechanism 410 is further connected to a first pressing frame 430 via a spring assembly 470. A fourth drive mechanism 440 is provided opposite the third drive mechanism 410 and is located on the same side as the pressing roller mechanism 340. A second pressing frame 450 is provided on the fourth drive mechanism 440, corresponding to the first pressing frame 430.

[0071] In one embodiment, the first pressing frame 430 and the second pressing frame 450 have the same shape and structure, both of which are C-shaped structures. Two cutters 420 are provided, and both cutters 420 are located in the C-shaped structure of the first pressing frame 430 and are symmetrically arranged up and down.

[0072] The fourth driving mechanism 440 is further connected to a fifth driving mechanism 480 for driving the fourth driving mechanism 440 to move to a position corresponding to the third driving mechanism 410 .

[0073] In this embodiment, the third drive mechanism 410, the fourth drive mechanism 440, and the fifth drive mechanism 480 are all cylinders. To distinguish them from the first drive mechanism 320, they are referred to herein as the second cylinder 411, the third cylinder 441, and the fourth cylinder 481, respectively. Specifically, the piston rod of the second cylinder 411 is connected to the cutter 420 and the first pressing frame 430. The cutter 420 is provided in two pieces. The piston rod of the third cylinder 441 is connected to the second pressing frame 450. The piston rod of the fourth cylinder 481 is connected to the cylinder barrel of the third cylinder 441 to drive the third cylinder 441 to reciprocate on an axis perpendicular to the pressing roller mechanism 340, thereby adjusting and positioning the position of the third cylinder 441 so that the third cylinder 441 and the second cylinder 411 remain on the same axis.

[0074] During an operation, please refer to Figure 3-Figure 12 When the first cylinder 321 drives the second clamping plate 312 to approach the first clamping plate 311, the bottom film of the battery cell 1 is clamped (see Figure 9 ), control the fourth cylinder 481 to drive the third cylinder 441 to move on the axis perpendicular to the pressing roller mechanism 340, so that the third cylinder 441 drives the second pressing frame 450 to move to the position corresponding to the first pressing frame 430. At this time, the first clamping plate 311 and the second clamping plate 312 are located between the first pressing frame 430 and the second pressing frame 450. The second cylinder 411 drives the first pressing frame 430 to move toward the direction of the third cylinder 441, and the third cylinder 441 drives the second pressing frame 450 to move toward the direction of the second cylinder 411. When the second cylinder 411 and the third cylinder 441 approach each other, so that the first pressing frame 430 and the second pressing frame 450 are close to each other and contact each other, a sliding groove 460 for guiding the cutter 420 is formed between the first pressing frame 430 and the second pressing frame 450 and the first clamping plate 311 and the second clamping plate 312 (please refer to Figure 7 ), there are two chute 460, and they are symmetrical up and down. When the second cylinder 411 drives the first pressing frame 430 to continue to press the second pressing frame 450, the spring assembly 470 on the first pressing frame 430 is compressed and deformed under the reaction force of the second pressing frame 450, so that the cutter 420 gradually extends. The two cutters 420 cut the bottom film clamped by the clamping mechanism 310 through the two chute 460, that is, cut two openings on the upper and lower sides of the bottom film by the cutter 420 to form the "two characters" (please refer to Figure 4 ), after the cutting process is completed, the second cylinder 411 retreats and returns to its initial state, the third cylinder 441 retreats and returns to its initial state, the fourth cylinder 481 drives the third cylinder 441 to retreat and return to its initial state, and the motor 3311 drives the first cylinder 321 to drive the clamping mechanism 310 to pull the bottom film (please refer to Figure 11), and simultaneously drives the pressing roller mechanism 340 to press the narrow side film. The synchronous film stretching and pressing operations have been described in detail above and will not be repeated here. In this embodiment, the second pressing frame 450 is driven away from the position between the first pressing roller 342 and the second pressing roller 344 by the fourth cylinder 481 and the third cylinder 441.

[0075] In order to improve the coating efficiency, the synchronization device 300 and the cutting device 400 in the present application are both provided in two numbers, and are respectively provided on both sides of the narrow side surface 12 of the battery cell 1, thereby being able to complete the film coating of the two narrow side surfaces 12 of the battery cell 1 synchronously.

[0076] Please also refer to Figure 2-Figure 12 The present application also provides a coating method, using the coating device 34 as any one of the aforementioned embodiments, the method includes the following steps S110-S130.

[0077] Step S110 : applying a packaging film to the wide side surfaces 11 and the bottom surface 13 of the battery cell 1 .

[0078] In this step, please refer to Figure 3 The battery cell 1 first needs to pass through the pre-treatment equipment 33 in the coating system 3 to complete the coating of the wide side film and the bottom film of the battery cell 1.

[0079] Step S120 : controlling the clamping mechanism 310 to clamp the bottom film attached to the battery cell 1 through the first driving mechanism 320 .

[0080] In this step, the first driving mechanism 320 selects the first cylinder 321, and uses the first cylinder 321 with a simple structure to control the second clamping plate 312 in the clamping mechanism 310 to approach the first clamping plate 311, thereby realizing the clamping operation of the bottom film of the battery cell 1. The clamping strength of the first cylinder 321 is easy to control, and the clamping mechanism 310 is not easy to damage the blue film 2 of the battery cell 1.

[0081] Step S130: cutting the bottom film by the cutting device 400.

[0082] In this step, after the clamping mechanism 310 clamps and fixes the bottom film, the fourth cylinder 481 is controlled to drive the third cylinder 441 to move on an axis perpendicular to the pressing roller mechanism 340, so that the third cylinder 441 drives the second pressing frame 450 to move to a position corresponding to the first pressing frame 430. At this time, the first clamping plate 311 and the second clamping plate 312 are located between the first pressing frame 430 and the second pressing frame 450, and the second cylinder 411 drives the first pressing frame 430 to move toward the third cylinder 441. The third cylinder 441 drives the second pressing frame 450 to move toward the second cylinder 411. When the second cylinder 411 drives the first pressing frame 430 to continue to press the second pressing frame 450, the spring assembly 470 on the first pressing frame 430 is compressed and deformed under the reaction force of the second pressing frame 450, causing the cutter 420 to gradually extend. The two cutters 420 cut the upper and lower sides of the bottom film clamped by the clamping mechanism 310 into two openings through the two slide grooves 460, forming a "two" (please refer to Figure 4 ) to complete the "cut" process.

[0083] Step S140 : The first driving mechanism 320 and the clamping mechanism 310 are driven by the second driving mechanism 330 to rotate with the clamping mechanism 310 as the rotation center, and the cut bottom film is pulled by the clamping mechanism 310 .

[0084] In this step, the rotation driving member body 331 of the second driving mechanism 330 uses the motor 3311 as the driving force, and the driving shaft of the motor 3311 rotates clockwise to drive the L-shaped connecting rod 332 to rotate clockwise (please refer to Figure 8 A direction), thereby driving the first clamping plate 311 and the second clamping plate 312 connected by the first cylinder 321 to pull the bottom film, and rotating with the contact end of the first clamping plate 311 and the second clamping plate 312 clamping the bottom film as the rotation center, pulling the bottom film after the shearing process to a position away from the narrow side of the battery cell 1 (please refer to Figure 10 and Figure 11 ,as well as Figure 7 B direction), so that an obtuse angle is formed between the bottom film and the narrow side film, and no interference occurs between the bottom film and the first pressing roller 342 and the second pressing roller 344.

[0085] Step S150 : the second driving mechanism 330 drives the pressing roller mechanism 340 through the transmission member 500 to flatten the wide side film so that the wide side film is attached to the narrow side of the battery cell 1 .

[0086] In this step, the driving shaft of the motor 3311 drives the conveyor belt to rotate, and then drives the first screw 341 to rotate clockwise, and then drives the first pressure roller 342 movably connected to the first screw 341 to move upward, and the second screw 343 rotates clockwise, and then drives the second pressure roller 344 movably connected to the second screw 343 to move downward, and the first pressure roller 342 and the second pressure roller 344 approach each other to cover the narrow side film attached to the battery cell 1.

[0087] By adopting the film wrapping method provided in the present application, the second driving mechanism 330 simultaneously drives the clamping mechanism 310 to pull the bottom film, and the pressing roller mechanism 340 to press the narrow side film, so that there is no interference between the bottom film and the pressing roller mechanism 340. While the bottom film is being pulled, the pressing roller mechanism 340 starts the film pressing process at the same time, which reduces the processing sequence of the film wrapping and improves the film wrapping efficiency. In addition, there is no need to set up an additional driving component to drive the pressing roller mechanism 340, which reduces the complexity of the structure and the manufacturing cost.

[0088] If the coating of the next battery cell 1 is to be continued, the motor 3311 only needs to be controlled to rotate in the opposite direction, and the coating method in steps S110 to S150 is repeated.

[0089] It should be noted that, unless there is any conflict, the features in the embodiments of this application can be combined with each other.

[0090] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A synchronization device, characterized in that: include: Clamping mechanism; a first driving mechanism connected to the clamping mechanism; a second driving mechanism, in transmission connection with the first driving mechanism, for driving the first driving mechanism and the clamping mechanism to rotate with the clamping mechanism as a rotation center; as well as a pressing roller mechanism, drivingly connected to the second driving mechanism; The pressing roller mechanism includes a first pressing roller and a second pressing roller, and the second driving mechanism drives the first pressing roller and the second pressing roller to move toward and away from each other through a transmission member; The clamping mechanism includes: a first clamping plate fixedly arranged on the first driving mechanism; and a second clamping plate, wherein the first driving mechanism is connected to the second clamping plate and drives the second clamping plate to move closer to or away from the first clamping plate to perform a clamping operation.

2. The synchronization device according to claim 1, characterized in that The second driving mechanism comprises: A rotating drive body; An L-shaped connecting rod connects the rotary drive member body and the first drive mechanism.

3. The synchronization device according to claim 1, characterized in that The pressing roller mechanism comprises: a first screw, wherein the first pressing roller is movably connected to the first screw; a second screw connected to the first screw, and the second pressure roller is movably connected to the second screw; The first screw end and the second screw end are connected and coaxially arranged, and the thread directions of the first screw and the second screw are opposite.

4. A film coating device, characterized in that: The invention comprises at least one cutting device and at least one synchronization device according to any one of claims 1 to 3.

5. The film coating device according to claim 4, characterized in that: The cutting device comprises: a third driving mechanism, arranged opposite to the pressing roller mechanism; at least one cutter connected to the third drive mechanism; The clamping mechanism is located between the third driving mechanism and the pressing roller mechanism.

6. The film coating device according to claim 5, characterized in that: The cutting device also includes: a first pressing frame, provided on the third driving mechanism, wherein the cutter is located in the first pressing frame; a fourth driving mechanism, located on the same side as the pressing roller mechanism and opposite to the third driving mechanism; The second pressing frame is arranged on the fourth driving mechanism, and the second pressing frame corresponds to the first pressing frame. The third driving mechanism drives the first pressing frame, and the fourth driving mechanism drives the second pressing frame, so that the first pressing frame and the second pressing frame are clamped and fixed close to each other, and a sliding groove for guiding the cutter is formed between the first pressing frame and the second pressing frame and the clamping mechanism.

7. The film coating device according to claim 6, characterized in that: Also includes: A fifth driving mechanism is connected to the fourth driving mechanism and is used to drive the fourth driving mechanism to move to a position corresponding to the third driving mechanism.

8. The film coating device according to claim 6, characterized in that: The first pressing frame is arranged on the third driving mechanism through a spring assembly.

9. A coating method, characterized in that: Using the coating device according to any one of claims 4 to 8 comprises the following steps: Apply the packaging film to the wide side and bottom of the battery cell; Controlling the clamping mechanism to clamp the bottom film by the first driving mechanism; The bottom film is cut by the cutting device; The first driving mechanism and the clamping mechanism are driven by the second driving mechanism to rotate with the clamping mechanism as the rotation center, and the bottom film after the cutting process is pulled by the clamping mechanism; The second driving mechanism drives the pressing roller mechanism to press the wide side film through the transmission member, so that the wide side film is attached to the narrow side of the battery cell.

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