Film pasting mechanism and battery production equipment

Abstract

The utility model relates to the technical field of battery production, and discloses a film pasting mechanism and battery production equipment. Comprising an unwinding device, a film drawing device, a detection device, a first deviation rectifying device and a second deviation rectifying device, wherein the unwinding device comprises a first roll shaft, the first roll shaft extends in the first direction, and the first roll shaft is used for tensioning an insulating material belt; the film drawing device is arranged at the discharging end of the unwinding device and comprises a clamping jaw and a driving assembly. The clamping jaw is used for clamping the insulating material belt, and the driving assembly is in driving connection with the clamping jaw and used for driving the clamping jaw to be close to or away from the unwinding device in the second direction; the detection device is arranged at the discharging end of the unwinding device and used for detecting the deviation condition of the insulating material belt. The first deviation rectifying device is in driving connection with the first roller shaft and used for driving the first roller shaft to move in the first direction according to a detection result of the detection device; the second deviation correcting device is in driving connection with the clamping jaw and used for driving the clamping jaw to move in the first direction according to the detection result of the detection device.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a film sticking mechanism and battery production equipment. Background Art

[0002] Lithium batteries, as energy storage units, can convert chemical energy into electrical energy. The production process for lithium batteries is divided into three stages: front-end, middle-end, and back-end. The front-end process processes raw materials into electrodes, the middle-end process converts the electrodes into unactivated cells, and the back-end process tests and packages. The middle-end process involves attaching insulating tape to the surface of the cell.

[0003] In one prior art process, the above-mentioned process is accomplished by a film-applying mechanism. The film-applying mechanism includes an unwinding device, a cutting device, and a clamping jaw. The unwinding device unwinds the insulating tape. The clamping jaw grips the insulating tape at the discharge end of the unwinding device and advances it a distance equal to the length of a battery cell. The cutting device then cuts the insulating tape, and finally, a smoothing roller adheres the insulating tape to the large surface of the battery cell. However, the insulating tape is prone to deviation during the unwinding process, causing it to be misaligned relative to the battery cell after being cut, thereby affecting the insulating tape's coating effect on the battery cell. Utility Model Content

[0004] The utility model provides a film sticking mechanism and battery production equipment, which are used to improve the phenomenon that the insulating material strip is deflected during the movement process, and improve the coating effect of the insulating material strip on the battery core.

[0005] In a first aspect, an embodiment of the present application provides a film laminating mechanism. The film laminating mechanism includes an unwinding device, a film pulling device, a detection device, a first deviation correcting device, and a second deviation correcting device; wherein:

[0006] The unwinding device includes a first roller, the first roller extends along a first direction, and the first roller is used to tension the insulating tape;

[0007] The film-pulling device is arranged at the discharge end of the unwinding device, and includes a clamping claw and a driving assembly; the clamping claw is used to clamp the insulating tape, and the driving assembly is driven and connected to the clamping claw, and is used to drive the clamping claw to approach the unwinding device or move away from the unwinding device along the second direction;

[0008] The detection device is provided at the discharge end of the unwinding device and is used to detect the deviation of the insulating tape;

[0009] The first correcting device is drivably connected to the first roller and is used to drive the first roller to move along the first direction according to the detection result of the detection device; the second correcting device is drivably connected to the clamping jaw and is used to drive the clamping jaw to move along the first direction according to the detection result of the detection device.

[0010] The beneficial effects of the film-sticking mechanism provided by the embodiment of the utility model are as follows:

[0011] During operation, the insulating tape is wound around a first roller, which tensions the tape. When a detection device detects deviation of the insulating tape, a first correction device drives the first roller in a first direction, causing the first roller to move the insulating tape, thereby correcting the deviation. Simultaneously, a second correction device drives the clamping jaws in the first direction to correct wrinkles in the insulating tape, ensuring a smoother surface after application to the battery cell, thereby enhancing the tape's coating effectiveness.

[0012] In a second aspect, an embodiment of the present application provides a battery production device, which includes the film-laminating mechanism described in the first aspect.

[0013] The beneficial effects of the battery production equipment provided by the embodiment of the utility model are as follows:

[0014] During the battery production process, the aforementioned battery production equipment can apply insulating tape to the surface of the battery cell using the film-applying mechanism described in the first aspect. During the film-applying process, the first deviation-correcting device can drive the first roller to move in a first direction based on the detection results of the detection device, and the second deviation-correcting device can drive the clamping jaws to move in the first direction based on the detection results of the detection device. The movement of the first roller can correct the deviation of the insulating tape, and the movement of the clamping jaws ensures that the force on both sides of the insulating tape along the first direction is more even, thereby reducing wrinkling of the insulating tape. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of a film-applying mechanism according to an embodiment of the present application;

[0016] Figure 2 A schematic diagram of the structure of the battery production equipment provided in an embodiment of the present application.

[0017] Reference numerals:

[0018] 10-unwinding device; 11-first roller; 12-unwinding shaft; 13-base; 131-main body; 132-extension part; 20-film pulling device; 21-clamping claw; 22-driving assembly; 23-frame; 30-detection device; 40-first deviation-correcting device; 50-second deviation-correcting device; 60-second roller; 70-cutting device; 80-tray; 90-transfer mechanism; 100-track; A-insulating tape. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the example embodiments of the present application to clearly and completely describe the technical solutions in the example embodiments of the present application. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of the present application. Therefore, it should be understood that various modifications and changes can be made to the example embodiments without departing from the scope of protection of the present application.

[0020] In the description of this application, unless otherwise expressly specified or limited, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more; and the term "and / or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the / the" object or "an" object is also intended to mean one of a possible plurality of such objects.

[0021] Unless otherwise specified or explained, the terms "connect," "fixed," etc. should be understood broadly. For example, "connected" can mean a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0022] Furthermore, in the description of the present application, it should be understood that the directional words such as “upper”, “lower”, “inner” and “outer” described in the example embodiments of the present application are described from the perspectives shown in the accompanying drawings and should not be understood as limiting the example embodiments of the present application. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) “upper”, “lower”, or “inner” or “outer”, it can not only be directly connected to the other (one or more) elements “upper”, “lower” or “inner” or “outer”, but can also be indirectly connected to the other (one or more) elements “upper”, “lower” or “inner” or “outer” through an intermediate element.

[0023] Figure 1 A structural diagram of a film-sticking mechanism provided in an embodiment of the present application is shown in FIG. Figure 1As shown, in one embodiment, the film-applying mechanism includes an unwinding device 10 and a film-pulling device 20, with the film-pulling device 20 being disposed at the discharge end of the unwinding device 10. Simply put, the unwinding device 10 is used to unwind the insulating tape A, and the film-pulling device 20 is used to apply a pulling force to the insulating tape A at the discharge end of the unwinding device 10, causing a portion of the insulating tape A to move above the battery cell.

[0024] Specifically, the unwinding device 10 includes a first roller 11 extending along a first direction X and used to tension the insulating tape A. The number of first rollers 11 may be one or more. In a specific embodiment, in addition to the first roller 11, the unwinding device 10 also includes an unwinding shaft 12. One end of the insulating tape A is wound around the unwinding shaft 12, and the other end is passed around the first roller 11 before being drawn out from the discharge end of the unwinding device 10. When a pulling force is applied to the insulating tape A at the discharge end of the unwinding device 10, the insulating tape A is gradually pulled out.

[0025] The film-pulling device 20 includes a clamping jaw 21 and a drive assembly 22. The clamping jaw 21 is used to clamp the insulating tape A. The drive assembly 22 is operatively connected to the clamping jaw 21, and is configured to drive the clamping jaw 21 toward the unwinding device 10 in the second direction Y, or to drive the clamping jaw 21 away from the unwinding device 10 in the second direction Y. Specifically, when the insulating tape A needs to be clamped, the drive assembly 22 drives the clamping jaw 21 toward the unwinding device 10 in the second direction Y. After the clamping jaw 21 clamps the insulating tape A, the drive assembly 22 drives the clamping jaw 21 away from the unwinding device 10 in the second direction Y, thereby pulling out a portion of the insulating tape A.

[0026] Please continue to refer to Figure 1 The film laminating mechanism also includes a detection device 30, a first deviation-correcting device 40, and a second deviation-correcting device 50. The detection device 30 is disposed at the discharge end of the unwinding device 10 and can be used to detect the deviation of the insulating tape A. The first deviation-correcting device 40 is operatively connected to the first roller 11 and is configured to drive the first roller 11 to move along a first direction X based on the detection results of the detection device 30. When the first roller 11 moves along the first direction X, the insulating tape A located on the surface of the first roller 11 will move accordingly with the first roller 11. If the unwinding device 10 includes multiple first rollers 11, each first roller 11 can move along the first direction X under the drive of the first deviation-correcting device 40. Alternatively, some first rollers 11 can move along the first direction X under the drive of the first deviation-correcting device 40, while some first rollers 11 can remain stationary. For any two first rollers 11 moving along the first direction X, the movement directions of the two first rollers 11 can be the same or opposite.

[0027] The second correcting device 50 is drivingly connected to the clamping jaw 21 and is used to drive the clamping jaw 21 to move along the first direction X according to the detection result of the detection device 30. When the clamping jaw 21 moves along the first direction X, the end of the insulating tape A will move accordingly with the clamping jaw 21.

[0028] During operation, the film-applying mechanism first clamps the end of the insulating tape A with the jaws 21. Then, the drive assembly 22 drives the jaws 21 gradually away from the unwinding device 10 in the second direction Y, causing a portion of the insulating tape A to be pulled out above the battery cell. Normally, after the insulating tape A is pulled out by the jaws 21, the extension direction of the insulating tape A is parallel or nearly parallel to the length of the battery cell. However, during the unwinding process, the insulating tape A may shift, causing the extension direction of the insulating tape A to tilt slightly relative to the length of the battery cell. If not corrected promptly, the offset of the insulating tape A will gradually accumulate, affecting the coating effect of the insulating tape A on the battery cell. In the present application, the detection device 30 can detect the offset of the insulating tape A at the discharge end of the unwinding device 10. If the offset of the insulating tape A exceeds the preset range, the first correction device 40 will drive the first roller 11 to move along the first direction X, so that the first roller 11 drives the insulating tape A to move accordingly, thereby correcting the offset of the insulating tape A so that the offset of the insulating tape A is within the preset range.

[0029] One end of the insulating tape A is wound around the unwinding shaft 12, and the other end is led out from the discharge end of the unwinding mechanism 10 after passing through the first roller 11. This end can be fixed by the clamp 21. After the first roller 11 moves under the drive of the first correcting device 40, the tension on both sides of the insulating tape A close to the clamp 21 along the first direction X will be different, which will easily form wrinkles. If the wrinkled insulating tape A is directly used to wrap the battery cell, the wrapping effect will be affected. Therefore, in the present application, the second correcting device 50 can drive the clamp 21 to move along the first direction X, so that after the clamp 21 clamps the insulating tape A, it can drive the insulating tape A to move left and right along the first direction X. In the process of the clamp 21 driving the insulating tape A to move, the phenomenon of uneven tension on both sides of the insulating tape A can be improved, and the risk of wrinkles on the insulating tape A after being attached to the surface of the battery cell can be reduced.

[0030] During operation of the film-applying mechanism, the first deflection-correcting device 40 can correct the deviation of the insulating tape A, ensuring that the detection results of the detection device 30 are within the required range. The second deflection-correcting device 50 can ensure that the tension on both sides of the insulating tape A is more uniform, thereby reducing the wrinkling of the insulating tape A.

[0031] Specifically, the first roller 11 and the clamping jaw 21 can move in the same or opposite directions. The distance moved by the first roller 11 and the distance moved by the clamping jaw 21 can be equal or different. The first roller 11 and the clamping jaw 21 can move synchronously, or the first roller 11 can move first and then the clamping jaw 21.

[0032] When configuring the detection device 30 , in one embodiment, the detection device 30 includes at least two deviation correction sensors, which are located on opposite sides of the insulating tape A along the first direction X. The detection results of the at least two deviation correction sensors can reflect the deviation of the insulating tape A.

[0033] Please continue to refer to Figure 1 In one embodiment, the film laminating mechanism further includes a second roller 60, which is disposed between the unwinding device 10 and the clamping jaws 21. The second roller 60 extends along the first direction X, or in other words, the second roller 60 and the first roller 11 are disposed in the same direction. The second roller 60 is used to abut against the insulating tape A. After the insulating tape A is drawn out from the discharge end of the unwinding device 10, it passes over the surface of the second roller 60 and is then clamped by the clamping jaws 21. In the above embodiment, by providing the second roller 60 and allowing the insulating tape A to pass over the surface of the second roller 60, the uneven tension on both sides of the insulating tape A along the first direction X can be improved, thereby improving the flatness of the insulating tape A.

[0034] When the second roller 60 is specifically arranged, the dimension of the second roller 60 along the first direction X is greater than the dimension of the insulating tape A along the first direction X. The second roller 60 can be located below or above the insulating tape A. The second roller 60 smoothes the insulating tape A and reduces wrinkles in the insulating tape A.

[0035] When specifically installing the second roller 60, in one embodiment, the second roller 60 can be independently installed between the unwinding device 10 and the film-drawing device 20 through a fixed frame. In another embodiment, the film-drawing device 20 also includes a frame 23, the clamping jaws 21 are slidably arranged on the frame 23 along the second direction Y, and the second roller 60 is arranged at one end of the frame 23 close to the unwinding device 10 along the second direction Y. In the above embodiment, by installing the second roller 60 on the frame 23, the stability of the second roller 60 can be improved, and the integration of the entire film-applying mechanism can be improved, and the number of parts can be reduced. In specific implementation, the second roller 60 can be installed on the frame 23 through components such as bearings, so that the second roller 60 can rotate, thereby reducing the friction force on the insulating tape A when passing through the surface of the second roller 60, and reducing the risk of the insulating tape A being broken.

[0036] In another embodiment, the unwinding device 10 further includes a base 13, and the first roller 11 and the second roller 60 are both mounted on the base 13. In this embodiment, by disposing the second roller 60 on the base 13, the stability of the second roller 60 can also be improved, and the integration of the entire film laminating mechanism can be improved, thereby reducing the number of parts.

[0037] In one embodiment, the film-applying mechanism further includes a cutting device 70, which is disposed between the unwinding device 10 and the clamping jaws 21. The cutting device 70 is used to cut the insulating tape A. During operation, the film-applying mechanism first clamps the end of the insulating tape A. Then, the drive assembly 22 drives the clamping jaws 21 gradually away from the unwinding device 10, causing a portion of the insulating tape A to be pulled out and moved above the battery cell. Next, the cutting device 70 cuts the insulating tape A. Finally, the smoothing rollers adhere the insulating tape A to the large surface of the battery cell.

[0038] When installing the cutting device 70, in one embodiment, the cutting device 70 is arranged at one end of the frame 23 along the second direction Y close to the unwinding device 10. When the above embodiment is specifically implemented, the frame 23 has a first fixing portion, and the cutting device 70 is fixed to the first fixing portion. The first fixing portion can be a fixing hole, which is used to accommodate a fastener, and the fastener can fix the cutting device 70 and the frame 23. The first fixing portion can also be a limiting groove, and the cutting device 70 is located in the limiting groove and is welded to the frame 23, or connected by a fastener. The first fixing portion enables the cutting device 70 to have a fixed installation position, and thus enables the cutting device 70 and the clamping jaw 21 to have a fixed positional relationship.

[0039] When installing the unwinding device 10, in one embodiment, the unwinding device 10 further includes a base 13, the first roller 11 is disposed on the base 13, and the base 13 is fixedly connected to the frame 23. When implementing the above embodiment, the frame 23 further includes a second fixing portion, and the unwinding device 10 is fixed to the second fixing portion. Similar to the first fixing portion, the second fixing portion can be a fixing hole or a structure such as a limiting groove. The second fixing portion provides the unwinding device 10 with a fixed installation position, thereby ensuring that the unwinding device 10 and the clamping jaw 21 have a fixed positional relationship.

[0040] In a specific embodiment, the base 13 includes a main portion 131 and an extension portion 132. The first roller 11 is mounted on the main portion 131, and the cutting device 70 is mounted on the extension portion 132. The extension portion 132 is fixedly connected to the frame 23. This ensures that the unwinding device 10, cutting device 70, and clamping jaws 21 are relatively fixed to each other, preventing relative misalignment during operation. This also improves the integration of the entire film laminating mechanism, reduces the number of components, and simplifies the structure.

[0041] When the second deflection-correcting device 50 is specifically provided, in one embodiment, the second deflection-correcting device 50 includes a linear motor module, which is arranged along the second direction Y. The linear motor module can drive the clamping jaw 21 along the second direction Y toward the unwinding device 10 , and can also drive the clamping jaw 21 along the second direction Y away from the unwinding device 10 .

[0042] During the film application process, in order to reduce the shaking of the battery cells and improve the film application effect, in one embodiment, a battery cell fixing device is further included, which is used to fix the battery cells to improve the stability of the battery cells. When the battery cell fixing device is specifically set, in one embodiment, the battery cell fixing device includes a plurality of telescopic columns. After the battery cell is moved to the film application station, the telescopic columns can be extended and distributed around the battery cell, thereby clamping the battery cell inside, thereby reducing the shaking of the battery cell and improving the stability of the battery cell. After the film application is completed, the above-mentioned plurality of telescopic columns can be shortened so as to be smaller than the height of the battery cell, so that the battery cell can be moved to the next station. In other embodiments, the battery cell fixing device may also include two splints, which clamp the battery cell from both sides of the battery cell along the second direction, thereby reducing the shaking of the battery cell.

[0043] Based on the same technical concept, an embodiment of the present application also provides a battery production device. Figure 2 A schematic diagram of the structure of the battery production equipment provided in the embodiment of the present application is shown as follows: Figure 2 As shown, the battery production equipment includes the film-sticking mechanism described in any of the above embodiments. During the process of producing batteries, the above-mentioned battery production equipment can stick the insulating tape A on the surface of the battery cell through the film-sticking mechanism described in the first aspect. During the film-sticking process, the first correcting device 40 can improve the offset of the insulating tape A, so that the detection result of the detection device 30 is within the required range. The second correcting device 50 can make the tension on both sides of the insulating tape A more uniform, and improve the wrinkling phenomenon of the insulating tape A. With the cooperation of the first correcting device 40 and the second correcting device 50, the extension direction of the insulating tape A can be parallel or nearly parallel to the length direction of the battery cell, and the insulating tape A can be relatively flat after being attached to the surface of the battery cell, thereby improving the coating effect of the insulating tape A on the battery cell.

[0044] Please continue to refer to Figure 2 In one embodiment, the battery production equipment further includes a tray 80 and a transfer mechanism 90. The tray 80 is used to carry the battery cells, and the transfer mechanism 90 is used to transfer the tray 80 to a position corresponding to the film laminating mechanism. The provision of the transfer mechanism 90 eliminates the need for manual handling of the battery cells, improves automation, and saves time.

[0045] In addition to the film-applying mechanism and the transfer mechanism 90, in one embodiment, the battery production equipment also includes a hot pressing mechanism and a side film collecting mechanism. The transfer mechanism 90 first transfers the battery cell to a position corresponding to the hot pressing mechanism for hot pressing. After the hot pressing is completed, the battery cell is transferred to the film-applying mechanism to apply insulating tape A to the surface of the battery cell. After the film-applying mechanism applies insulating tape A to the surface of the battery cell, the insulating tape A extends beyond the surface of the battery cell. The battery cell is transferred by the transfer mechanism 90 to the position corresponding to the side film collecting mechanism. The side film collecting mechanism folds the portion of insulating tape A extending beyond the surface of the battery cell to the side of the battery cell, so that the insulating tape A is attached to the side of the battery cell.

[0046] In a specific embodiment, the battery production equipment also includes a track 100, and the transfer mechanism 90 is used to drive the tray 80 to slide along the track 100 and transfer the tray 80 to a position corresponding to the film laminating mechanism or other processing and production mechanism. In the specific setting, the film pulling mechanism also includes a frame 23, and the track 100 passes through the frame 23, or in other words, the frame 23 spans above the track 100. The frame 23 includes a crossbeam and columns arranged at both ends of the crossbeam, and the two columns are respectively arranged on both sides of the track 100, and the crossbeam is located above the track 100. The crossbeam extends along the second direction Y, and the linear motor module is arranged on the crossbeam. The clamping jaws 21, the cutting device 70 and the unwinding device 10 are arranged along the second direction Y.

[0047] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A film-sticking mechanism, characterized in that: It includes an unwinding device, a film pulling device, a detection device, a first deviation correcting device and a second deviation correcting device; The unwinding device includes a first roller, the first roller extends along a first direction, and the first roller is used to tension the insulating tape; The film-pulling device is arranged at the discharge end of the unwinding device, and includes a clamping claw and a driving assembly; the clamping claw is used to clamp the insulating tape, and the driving assembly is driven and connected to the clamping claw, and is used to drive the clamping claw to approach the unwinding device or move away from the unwinding device along the second direction; The detection device is provided at the discharge end of the unwinding device and is used to detect the deviation of the insulating tape; The first deviation-correcting device is drivingly connected to the first roller, and is used to drive the first roller to move along the first direction according to the detection result of the detection device; The second deviation-correcting device is drivingly connected to the clamping jaw and is used to drive the clamping jaw to move along the first direction according to the detection result of the detection device.

2. The film-sticking mechanism according to claim 1, characterized in that: It also includes a second roller, which is arranged between the unwinding device and the clamping claw; the second roller extends along the first direction; and the second roller is used to abut against the insulating tape.

3. The film-sticking mechanism according to claim 2, characterized in that: The film-stretching device further includes a frame, the clamping claw is slidably arranged on the frame along the second direction, and the second roller is arranged at one end of the frame close to the unwinding device along the second direction.

4. The film sticking mechanism according to any one of claims 1 to 3, characterized in that: It also includes a cutting device, which is used to cut the insulating tape; The film-stretching device further comprises a frame, the clamping claw is slidably arranged on the frame along the second direction, and the cutting device is fixed to one end of the frame close to the unwinding device along the second direction.

5. The film-sticking mechanism according to claim 4, characterized in that: The unwinding device further includes a base, the first roller is arranged on the base, and the base is fixedly connected to the frame.

6. The film-sticking mechanism according to claim 5, characterized in that: The base includes a main body and an extension part. The first roller is arranged on the main body. The cutting device is arranged on the extension part. The extension part is fixedly connected to the frame.

7. The film sticking mechanism according to any one of claims 1 to 3, characterized in that: It also includes a battery core fixing device, which is used to fix the battery core.

8. A battery production device, characterized in that: The invention comprises a film sticking mechanism as described in any one of claims 1 to 7.

9. The battery production equipment according to claim 8, characterized in that It also includes a tray and a transfer mechanism, wherein the tray is used to carry the battery cells, and the transfer mechanism is used to drive the tray to be transferred to a position corresponding to the film-sticking mechanism.

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