Clamping device, film coating equipment and film coating method

Abstract

The present application provides a clamping device, a film coating device and a film coating method. The clamping device of the present application includes: a first clamping plate, a second clamping plate, a control mechanism, and a driving mechanism. The first clamping plate is fixed on the control mechanism. The control mechanism is used to drive the first clamping plate and / or the second clamping plate to approach or separate from each other and reach a preset position so that a preset gap is left between the first clamping plate and the second clamping plate; the driving mechanism is connected to the control mechanism and is used to drive the control mechanism to rotate with the center of the control mechanism as the rotation axis so that the first clamping plate and the second clamping plate can perform a clamping and pulling operation. The present application also provides a film coating device and a film coating method. The clamping device of the present application reduces the control pressure through the control mechanism, so that the first clamping plate and the second clamping plate clamp the bottom surface film and pull it away from the first pressure roller and the second pressure roller. At the same time, the bottom surface film can slide relative to the first clamping plate and the second clamping plate, and the bottom surface film will not be damaged, thereby reducing costs.

Description

Technical Field

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

[0002] The process of wrapping the cell with insulating film is particularly important in the battery production process. The 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 cell in sequence. During the packaging film pasting process, in order to prevent the pasting process of the bottom film and the narrow side film from interfering with each other, the bottom film is clamped by a clamping device, and then the narrow side film is pasted by a roller device. The clamping device often uses a clamping plate to clamp the bottom film. During the operation of the clamping device, if the force of the clamping plate is not well controlled, the packaging film is easily damaged, resulting in reduced film wrapping efficiency and increased production costs. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a clamping device, a film wrapping device and a film wrapping method, which can prevent the packaging film from being damaged and improve the film wrapping efficiency and film wrapping effect.

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

[0005] First splint;

[0006] Second splint;

[0007] A control mechanism, used for driving the first clamping plate and / or the second clamping plate to move closer to or away from each other and reach a preset position, so that a preset gap is left between the first clamping plate and the second clamping plate;

[0008] The driving mechanism is connected to the control mechanism and is used to drive the control mechanism to rotate with the center of the control mechanism as the rotation axis so that the first clamping plate and the second clamping plate can perform clamping and pulling operations.

[0009] In one embodiment, the first clamping plate is fixed on the control mechanism, and a driving member in the control mechanism is connected to the second clamping plate for driving the second clamping plate to approach or separate from the first clamping plate.

[0010] In one embodiment, the driving mechanism comprises:

[0011] Rotating drive member;

[0012] A fixing member connects the rotary driving member and the control mechanism.

[0013] The second aspect of the embodiments of the present application provides a coating device, including a pressure roller device and the clamping device described in any one of the first aspects of the embodiments of the present application, the pressure roller device is connected to the driving mechanism through a transmission member, and the driving mechanism drives the pressure roller device to perform a flattening operation.

[0014] In one embodiment, the pressing roller device comprises:

[0015] A screw rod connected to the transmission member;

[0016] At least one pressing roller is movably connected to the screw rod, and the driving mechanism drives the screw rod to rotate through the transmission member, thereby driving the pressing roller to perform a flattening operation.

[0017] In one embodiment, it further includes: a cutting device;

[0018] The cutting device comprises:

[0019] Cutting drive assembly;

[0020] At least one cutter is connected to the cutting drive assembly. The first clamping plate and / or the second clamping plate are provided with slots, and the cutting drive assembly drives the cutter to pass through the slots.

[0021] In one embodiment, the cutting device further comprises:

[0022] A support plate is arranged on the cutting drive assembly, and the cutter is arranged on the support plate.

[0023] In one embodiment, the position and shape of the slot hole correspond to the position and shape of the cutter.

[0024] In one embodiment, the number of the cutters is two.

[0025] A third aspect of the embodiment of the present application provides a coating method, using any coating device provided in the second aspect of the embodiment of the present application, comprising the following steps:

[0026] Apply the packaging film to the wide side and bottom of the battery cell;

[0027] The control mechanism drives the second clamping plate to approach and clamp the first clamping plate to a preset position to clamp the bottom film;

[0028] The driving mechanism controls the control mechanism to rotate with the center of the control mechanism as the rotation axis, so that the first clamping plate and the second clamping plate pull the bottom surface film, so that the bottom surface film can slide relatively between the first clamping plate and the second clamping plate;

[0029] The driving mechanism drives the pressing roller device to perform a flattening operation through a transmission member, so that the wide side film is attached to the narrow side of the battery core.

[0030] The technical solution provided in the above-mentioned embodiments of the present application reduces the control pressure through the control mechanism, so that the first clamping plate and the second clamping plate drive the bottom film to be pulled away from the first pressure roller and the second pressure roller. At the same time, the bottom film can slide relative to the first clamping plate and the second clamping plate, which will not damage the bottom film and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. 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 related drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of the structure of a coated battery cell is provided for one embodiment of the present application;

[0033] Figure 2 This is a schematic diagram of a state where a battery cell is covered with a bottom film and a wide side film according to an embodiment of the present application;

[0034] Figure 3 A schematic diagram of the state of the cell cutting process provided by an embodiment of the present application;

[0035] Figure 4 A schematic diagram of a state of a battery cell after being covered with a narrow side film according to an embodiment of the present application;

[0036] Figure 5 A schematic diagram of a state where a battery cell provided in an embodiment of the present application is covered with top and bottom films;

[0037] Figure 6 A schematic diagram of the structure of a film coating device provided in one embodiment of the present application;

[0038] Figure 7 A partial structural state diagram of a film coating device provided in one embodiment of the present application;

[0039] Figure 8 A top view of a film clamping state of a clamping device provided in one embodiment of the present application;

[0040] Fig. 9 A top view of a film-pulling state of a clamping and pressing device provided in an embodiment of the present application;

[0041] Fig.10 A schematic diagram of the structure of a cutting device provided in one embodiment of the present application.

[0042] Reference numerals:

[0043] 1-battery core; 11-wide side; 12-narrow side; 13-bottom surface; 14-top surface; 2-blue film; 3-film coating equipment; 31-clamping device; 300-first clamping plate; 310-slot hole; 400-second clamping plate; 500-control mechanism; 510-first cylinder; 600-driving mechanism; 610-rotating driving member; 611-motor; 612-fixing member; 700-transmission member; 710-conveyor belt; 3 2-pressure roller device; 320-screw; 321-first screw; 322-second screw; 330-pressure roller; 331-first pressure roller; 3311-first mounting shaft seat; 3312-first threaded hole; 332-second pressure roller; 3321-second mounting shaft seat; 3322-second threaded hole; 33-cutting device; 340-cutting drive assembly; 341-second cylinder; 342-support plate; 343-cutter. DETAILED DESCRIPTION

[0044] The terms “first”, “second”, “third”, etc. are only used for distinguishing descriptions and do not indicate the order of arrangement, nor can they be understood as indicating or implying relative importance.

[0045] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0046] In the description of the present 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 directions or positional relationships in which the products of the present application are usually placed when in use. They are only for the convenience of describing the present 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, and therefore should not be understood as a limitation on the present application.

[0047] In the description of this application, unless otherwise clearly specified and limited, the terms "set", "installed", "connected" and "connected" 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, and it can be the internal connection of two elements.

[0048] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings.

[0049] Please refer to Figure 1The battery cell 1 is a rectangular structure, including two wide sides 11, two narrow sides 12, a bottom surface 13 and a top surface 14. In the battery manufacturing process, a PET blue film 2 is usually used as an insulating material between the battery cells 1. Please refer to Figure 2-Figure 5 The coating of the cell 1 requires that the blue film 2 be attached to the two wide sides 11 and the bottom 13 of the cell 1 (see Figure 3 ), the blue film 2 is pressed and pasted on the bottom surface 13 by the pressing device, and then the narrow side film is pasted by the pressing roller device (please refer to Figure 4 , Figure 5 ), and finally, the top surface 14 and the bottom surface 13 of the battery cell 1 are filmed (please refer to Figure 5 ), in this embodiment, the packaging equipment structure for coating the two wide side films, the bottom film and the top film can refer to the structure in the prior art. The specific structure of the clamping device 31 and the method of using the clamping device 31 to coat the battery cell 1 will be described in detail below.

[0050] Please refer to Figure 6 , which is a schematic diagram of the structure of a film coating device 3 provided in an embodiment of the present application. The film coating device 3 includes a clamping device 31, a pressing roller device 32 and a cutting device 33.

[0051] Please refer to Figure 7-10 The clamping device 31 includes: a first clamping plate 300, a second clamping plate 400, a control mechanism 500, and a driving mechanism 600; the control mechanism 500 is used to drive the first clamping plate 300 and / or the second clamping plate 400 to approach or separate from each other and reach a preset position, so that a preset gap is left between the first clamping plate 300 and the second clamping plate 400; the driving mechanism 600 is connected to the control mechanism 500, and is used to drive the control mechanism 500 to rotate with the center of the control mechanism 500 as the rotation axis, thereby driving the first clamping plate 300 and the second clamping plate 400 to perform a pulling operation.

[0052] The control mechanism 500 can be connected to the first clamping plate 300 and the second clamping plate 400 at the same time, and drive the first clamping plate 300 and the second clamping plate 400 to move closer to or away from each other, or can be connected to one of the first clamping plate 300 or the second clamping plate 400 to control one of them to move closer to or away from the other. In one embodiment, the first clamping plate 300 is fixed to the control mechanism 500, and the driving member in the control mechanism 500 is connected to the second clamping plate 400 to drive the second clamping plate 400 to move closer to or away from the first clamping plate.

[0053] In one embodiment, the control mechanism 500 may be a structure capable of pushing the first clamping plate 300 and the second clamping plate 400 to perform reciprocating motion to achieve clamping and loosening operations, such as a cylinder, referred to herein as the first cylinder 510. The driving member of the first cylinder 510 is a piston rod, which is connected to the second clamping plate 400. The first cylinder 510 controls the second clamping plate 400 to move closer to the first clamping plate 300 for clamping, thereby clamping the blue film 2 (please refer to Figure 8 ).

[0054] Please refer to Figure 7 , the driving mechanism 600 includes a rotating driving member 610 and a fixing member 612, and the fixing member 612 connects the rotating driving member 610 and the control mechanism 500. The rotating driving member 610 can be a motor or a rotating cylinder or other driving structure that can achieve a linear driving effect. For example, the rotating driving member 610 is one of a rotating cylinder or a motor. In one embodiment, the driving mechanism 600 is a motor 611, and a fixing member 612 is provided on the driving shaft of the motor 611. The first cylinder 510 is fixedly mounted on the fixing member 612, which can prevent the driving mechanism 600 from driving the first cylinder 510 and the first clamping plate 300 and the second clamping plate 400. When the first cylinder 510 rotates with the center of the first cylinder 510 as the rotation axis, the first cylinder 510 shakes, resulting in a poor clamping effect of the first clamping plate 300 and the second clamping plate 400.

[0055] In this embodiment, please refer to Figure 7 When the motor 611 drives the first cylinder 510 to rotate with the center of the first cylinder 510 as the axis of rotation, Figure 7 The first clamping plate 300 and the second clamping plate 400 are rotated counterclockwise in the direction indicated by the middle arrow, thereby pulling the bottom film (please refer to Fig. 9 ), when the first clamping plate 300 and the second clamping plate 400 clamp and pull the bottom film, it is necessary to control the air supply force of the first cylinder 510, that is, reduce the air supply pressure of the first cylinder 510 so that the first clamping plate 300 and the second clamping plate 400 are relatively loosened, leaving a preset gap. Due to the preset gap left between the first clamping plate 300 and the second clamping plate 400, the bottom film can slide relatively in the preset gap, thereby preventing the first clamping plate 300 and the second clamping plate 400 from being too tight during the clamping operation on the bottom film, which may cause the bottom film to be damaged during pulling.

[0056] Please refer to Figure 6 , Figure 7The pressing roller device 32 is connected to the driving mechanism 600 through the transmission member 700, and the driving mechanism 600 drives the pressing roller device 32 to perform a flattening operation. The pressing roller device 32 includes: a screw rod 320 and at least one pressing roller 330, the screw rod 320 is connected to the transmission member 700, and the pressing roller 330 is movably connected to the screw rod 320. The driving mechanism 600 drives the screw rod 320 to rotate through the transmission member 700, thereby driving the pressing roller 330 to perform a flattening operation.

[0057] In one embodiment, please refer to Figure 7 The screw rod 320 includes a first screw rod 321 and a second screw rod 322, and the pressure roller 330 includes a first pressure roller 331 and a second pressure roller 332. The end of the first pressure roller 331 is connected to the first mounting shaft seat 3311, and the first mounting shaft seat 3311 is provided with a first threaded hole 3312 threadedly matched with the first screw rod 321, so that the first pressure roller 331 is movably connected to the first screw rod 321. Similarly, the end of the second pressure roller 332 is connected to the second mounting shaft seat 3321, and the second mounting shaft seat 3321 is provided with a second threaded hole 3322 threadedly matched with the second screw rod 322, so that the second pressure roller 332 is movably connected to the second screw rod 322. The top end of the first screw rod 321 and the bottom end of the second screw rod 322 are connected and coaxially arranged. The first screw 321 is connected to the driving shaft of the motor 611 through the conveyor belt 710. When the motor 611 is running, the driving shaft of the motor 611 drives the first screw 321 and the second screw 322 to rotate through the conveyor belt 710. Since the thread directions of the first screw 321 and the second screw 322 are opposite, the first pressure roller 331 and the second pressure roller 332 can approach and separate in opposite directions (both vertical directions).

[0058] Please refer to Fig.10 , which is a schematic diagram of the structure of a cutting device 33 provided in an embodiment of the present application. The cutting device 33 includes: a cutting drive assembly 340, at least one cutter 343, the cutter 343 is connected to the cutting drive assembly 340, and a slot 310 corresponding to the cutter 343 is provided on the first clamping plate 300 and / or the second clamping plate 400 (please refer to Figure 7 ), the cutting drive assembly 340 drives the cutter 343 to pass through the slot 310, and the position and shape of the slot 310 correspond to the position and shape of the cutter 343, so that the cutter 343 can pass through the slot 310 smoothly.

[0059] In this embodiment, the cutting drive assembly 340 can be a cylinder or other drive structure capable of achieving a linear drive effect, such as a cylinder, which is referred to as the second cylinder 341 to distinguish it from the cylinder mentioned above. The piston rod of the second cylinder 341 can be directly connected to the cutter 343, and the second cylinder 341 drives the cutter 343 to reciprocate in the horizontal direction.

[0060] In another embodiment, please refer to Figure 7 A support plate 342 is provided on the cutting drive assembly 340, and a cutter 343 is provided on the support plate 342. Specifically, the piston rod of the second cylinder 341 is connected to the support plate 342, and two cutters 343 are provided and fixedly provided at the upper end and the lower end of the support plate 342. It should be noted that the first clamping plate 300 and the second clamping plate 400 may both be provided with slots 310 corresponding to the cutter 343, or the slots 310 may be provided on one of the first clamping plate 300 and the second clamping plate 400. In this embodiment, the slots 310 are provided on both the first clamping plate 300 and the second clamping plate 400.

[0061] Before the narrow side film of the battery cell 1 is pasted with the clamping device 31 of the present application, the battery cell 1 has already completed the pasting of the wide side film and the bottom film (please refer to Figure 2 ). During an operation, please also refer to Figures 7 to 10 When the first cylinder 510 drives the second clamping plate 400 to approach the first clamping plate 300, the bottom film of the battery cell 1 is clamped and pressed (see Figure 8 ), the second cylinder 341 drives the support plate 342 together with the cutter 343 to move toward the first clamping plate 300 and the second clamping plate 400, so that the cutter 343 can smoothly pass through the slot 310, and cut the bottom film clamped between the first clamping plate 300 and the second clamping plate 400 to form a "two-character" shape, thus completing the two-character cutting process of the bottom film (please refer to Figure 3 ), it should be noted that, when the cutting device 33 is cutting the bottom film, it is necessary to control the air supply force of the first cylinder 510, that is, to increase the air supply pressure of the first cylinder 510 so that the first clamping plate 300 and the second clamping plate 400 can clamp the bottom film more firmly, so as to avoid the bottom film slipping due to the unstable clamping of the first clamping plate 300 and the second clamping plate 400 when the cutter 343 cuts the bottom film.

[0062] After cutting is completed, the first cylinder 510 drives the support plate 342 to drive the cutter 343 to return and restore to the initial state. At this time, the motor 611 starts to work, and the drive shaft of the motor 611 rotates counterclockwise (please refer to Figure 7 The first clamping plate 300 and the second clamping plate 400 move away from one end of the first cylinder 510 and swing in the direction away from the first pressing roller 331 and the second pressing roller 332. At this time, the first cylinder 510 reduces the air supply pressure, so that the first clamping plate 300 and the second clamping plate 400 drive the bottom film to be pulled away from the first pressing roller 331 and the second pressing roller 332. At the same time, the bottom film can slide relative to the first clamping plate 300 and the second clamping plate 400, driving the bottom film to rotate in the direction away from the narrow side surface 12 of the battery cell 1. At this time, the bottom film is partially bent in the first clamping plate 300 and the second clamping plate 400, and an acute angle ( Fig. 9 θ in the figure), thus forming Fig. 9 The bottom film is clamped and pulled by the first clamping plate 300 and the second clamping plate 400. At the same time, the driving shaft of the motor 611 drives the conveyor belt 710 to rotate, thereby driving the first screw 321 to rotate clockwise, thereby driving the first pressing roller 331 movably connected to the first screw 321 to move upward, and the second screw 322 rotates clockwise, thereby driving the second pressing roller 332 movably connected to the second screw 322 to move downward, and the first pressing roller 331 and the second pressing roller 332 approach each other to apply the narrow side film applied to the battery cell 1. During this operation, there is no interference between the bottom film and the first pressing roller 331 and the second pressing roller 332.

[0063] It should be noted that the first pressing roller 331 and the second pressing roller 332 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 611 driving the conveyor belt, the first pressing roller 331 and the second pressing roller 332 complete the coating of the narrow side surface film of the battery cell 1.

[0064] Please also refer to Figure 2-Figure 10 The present application also provides a coating method, using the coating device 3 as any one of the aforementioned embodiments, the method includes the following steps S110-S140.

[0065] Step S110 : applying a packaging film to the wide side surface 11 and the bottom surface 13 of the battery cell 1 .

[0066] In this step, please refer to Figure 2 The battery cell 1 first needs to be coated with a wide side film and a bottom film.

[0067] Step S120: the control mechanism 500 drives the second clamping plate 400 to approach and clamp the first clamping plate 300 to a preset position, thereby clamping the bottom film.

[0068] In this step, the control mechanism 500 is selected as the first cylinder 510, and the first cylinder 510 controls the second clamping plate 400 to approach the first clamping plate 300 for clamping. The air supply force of the first cylinder 510 is adjustable, so as to control the distance of the second clamping plate 400 approaching the first clamping plate 300 to reach a preset position, and a preset gap is left between the first clamping plate 300 and the second clamping plate 400, and the bottom film can slide relatively in the preset gap, so as to avoid the first clamping plate 300 and the second clamping plate 400 from being damaged when the bottom film is clamped and pressed too tightly (please refer to Figure 7 , Figure 8 ).

[0069] In one embodiment, in this step, the bottom film is cut using a cutting device 33. When the first cylinder 510 drives the second clamping plate 400 to approach the first clamping plate 300 and clamp the bottom film of the battery cell 1, the second cylinder 341 drives the support plate 342 and the cutter 343 to move toward the first clamping plate 300 and the second clamping plate 400, so that the cutter 343 can smoothly pass through the slot 310 and cut the bottom film clamped between the first clamping plate 300 and the second clamping plate 400 to form a "two-character" shape, thus completing the "two-character" cutting process of the bottom film (please refer to Figure 3 As mentioned above, in this step, when the cutting device 33 is cutting the bottom film, the air pressure of the first cylinder 510 needs to be increased so that the first clamping plate 300 and the second clamping plate 400 clamp the bottom film more firmly.

[0070] Step S130: The driving mechanism 600 controls the control mechanism 500 to rotate with the center of the control mechanism 500 as the rotation axis, so that the first clamping plate 300 and the second clamping plate 400 pull the bottom film, so that the bottom film can slide relatively between the first clamping plate 300 and the second clamping plate 400.

[0071] In this step, the rotary drive member 610 in the driving mechanism 600 rotates the motor 611, and the driving shaft of the motor 611 rotates counterclockwise to drive the first clamping plate 300 and the second clamping plate 400 to move away from one end of the first cylinder 510 and swing in the direction away from the first pressing roller 331 and the second pressing roller 332. At this time, the first cylinder 510 reduces the air supply pressure, so that the first clamping plate 300 and the second clamping plate 400 drive the bottom surface film after the shearing process to be pulled away from the first pressing roller 331 and the second pressing roller 332. At the same time, the bottom surface film can slide relative to the first clamping plate 300 and the second clamping plate 400, driving the bottom surface film to rotate in the direction away from the narrow side surface 12 of the battery cell 1. At this time, the bottom surface film is partially bent in the first clamping plate 300 and the second clamping plate 400, and the bending portion between the first clamping plate 300 and the second clamping plate 400 forms an acute angle ( Fig. 9 θ in the figure), thus forming Fig. 9 The midsole mask is in a state after being clamped and pulled by the first clamping plate 300 and the second clamping plate 400.

[0072] Step S140 : the driving mechanism 600 drives the pressing roller device 32 to perform a flattening operation through the transmission member 700 , so that the wide side film is attached to the narrow side of the battery cell 1 .

[0073] In this step, after step S130, the driving shaft of the motor 611 drives the conveyor belt 710 to rotate, thereby driving the first screw 321 to rotate clockwise, thereby driving the first pressure roller 331 movably connected to the first screw 321 to move upward, and the second screw 322 rotates clockwise, thereby driving the second pressure roller 332 movably connected to the second screw 322 to move downward, and the first pressure roller 331 and the second pressure roller 332 approach each other to coat the narrow side film adhered to the battery cell 1.

[0074] By adopting the coating method provided in the present application, the first cylinder 510 reduces the air supply pressure so that the first clamping plate 300 and the second clamping plate 400 clamp the bottom surface film and pull it backward away from the first pressure roller 331 and the second pressure roller 332. At the same time, the bottom surface film can slide relative to the first clamping plate 300 and the second clamping plate 400 without damaging the bottom surface film; secondly, the driving mechanism 600 simultaneously drives the control mechanism 500 to drive the first clamping plate 300 and the second clamping plate 400 to pull the bottom surface film, and the pressure roller device 32 to press the narrow side film, so that there is no interference between the bottom surface film and the pressure roller device 32, and there is no need to move the battery cell 1 to another workstation for processing, thereby reducing the processing sequence of coating and improving the coating efficiency.

[0075] If the coating of the next battery cell 1 is to be continued, the motor 611 only needs to be controlled to rotate in the opposite direction (ie, clockwise), and the coating method in steps S110 to S140 is repeated.

[0076] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0077] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A coating device, characterized in that: include: A clamping device, the clamping device comprising: First splint; Second splint; A control mechanism, used for driving the first clamping plate and / or the second clamping plate to move closer to or away from each other and reach a preset position, so that a preset gap is left between the first clamping plate and the second clamping plate, and the preset gap enables the bottom film of the battery cell to slide relatively between the first clamping plate and the second clamping plate; The driving mechanism is connected to the control mechanism and is used to drive the control mechanism to rotate with the center of the control mechanism as the rotation axis so that the first clamping plate and the second clamping plate can perform clamping and pulling operations.

2. The coating device according to claim 1, characterized in that: The first clamping plate is fixed on the control mechanism, and the driving member in the control mechanism is connected to the second clamping plate for driving the second clamping plate to approach or separate from the first clamping plate.

3. The coating device according to claim 1, characterized in that: The driving mechanism comprises: Rotating drive member; A fixing member connects the rotary driving member and the control mechanism.

4. The coating device according to claim 1, characterized in that: Including a roller device, The pressing roller device is connected to the driving mechanism via a transmission member, and the driving mechanism drives the pressing roller device to perform a flattening operation.

5. The coating device according to claim 4, characterized in that: The pressing roller device comprises: A screw rod connected to the transmission member; At least one pressing roller is movably connected to the screw rod, and the driving mechanism drives the screw rod to rotate through the transmission member, thereby driving the pressing roller to perform a flattening operation.

6. The coating device according to claim 4, characterized in that: Also includes: Cutting device; The cutting device comprises: Cutting drive assembly; At least one cutter is connected to the cutting drive assembly. The first clamping plate and / or the second clamping plate are provided with slots, and the cutting drive assembly drives the cutter to pass through the slots.

7. The coating device according to claim 6, characterized in that: The cutting device also includes: A support plate is arranged on the cutting drive assembly, and the cutter is arranged on the support plate.

8. The coating device according to claim 6, characterized in that: The position and shape of the slot hole correspond to the position and shape of the cutter.

9. The coating device according to claim 6, characterized in that: The number of the cutters is two.

10. 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; The control mechanism drives the second clamping plate to approach and clamp the first clamping plate to a preset position to clamp the bottom film; The driving mechanism controls the control mechanism to rotate with the center of the control mechanism as the rotation axis, so that the first clamping plate and the second clamping plate pull the bottom film, so that the bottom film of the battery cell slides relatively between the first clamping plate and the second clamping plate; The driving mechanism drives the pressing roller device to perform a flattening operation through a transmission member, so that the wide side film is attached to the narrow side of the battery core.

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