Adhesive tape winding mechanism and adhesive tape winding machine

Abstract

The utility model discloses an adhesive tape winding mechanism which is used for adsorbing an adhesive tape and attaching the adhesive tape to a battery cell, the adhesive tape winding mechanism comprises two adsorption arms, the two adsorption arms are oppositely arranged at an interval and used for adsorbing the adhesive tape, and one side, facing the other adsorption arm, of each adsorption arm is convexly provided with a first elastic pressing component; and the first elastic pressing component is used for elastically pressing the film when the battery cell and the film enter the interval between the two adsorption arms, so that the film is bent, wound, pressed and attached to the battery cell. The utility model further discloses a rubber winding machine adopting the rubber winding mechanism. In the glue winding process of the battery cell, the first elastic abutting component of the glue winding mechanism elastically abuts against the battery cell, so that glue winding can be stably and safely carried out on the battery cell, and the surface of the battery cell cannot be scratched.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium-ion battery manufacturing, and particularly relates to a glue winding mechanism and a glue winding machine. Background Art

[0002] In the preparation process of a lithium battery, before encapsulating the battery cell in an aluminum plastic film, it is necessary to stick a winding glue on the battery cell to prevent the battery cell from loosening.

[0003] The process of sticking the winding glue on the battery cell is specifically as follows: adjust the distance between two glue winding clamping arms to the thickness of the battery cell, and then the free ends of the glue winding clamping arms adsorb the winding glue and move towards the battery cell, so that the battery cell drives the winding glue to enter between the two glue winding clamping arms together, and thus the winding glue is adhered to the battery cell through the ends of the glue winding clamping arms.

[0004] However, in the actual adhesion process, the distance between the two glue winding clamping arms cannot be adjusted to be exactly the same as the thickness of the battery cell. Therefore, if the interval between the two glue winding clamping arms is less than the thickness of the battery cell, when the battery cell enters between the two glue winding clamping arms, the surface of the battery cell may be scratched by the ends of the glue winding clamping arms. If the interval between the two glue winding clamping arms is greater than the thickness of the battery cell, the film cannot be tightly adhered to the battery cell. Summary of the Utility Model

[0005] The main purpose of the utility model is to propose a glue winding mechanism, aiming to solve the problem of scratching the battery cell when sticking the winding glue.

[0006] To achieve the above purpose, one aspect of the utility model proposes a glue winding mechanism for adsorbing a film and adhering the film to a battery cell. The glue winding mechanism includes two adsorption arms, which are arranged opposite to each other at an interval for adsorbing the film. A first elastic pressing member is convexly provided on one side of each adsorption arm facing the other adsorption arm. The first elastic pressing member is used for elastically pressing on the film when the battery cell and the film enter the interval between the two adsorption arms, so as to bend and press the film tightly against the battery cell.

[0007] In some embodiments, the first elastic pressing member includes a first pressing member and a first elastic member. The first elastic member is arranged between the first pressing member and the adsorption arm. The first pressing member is used for pressing the film tightly against the battery cell under the elastic force of the first elastic member.

[0008] In some embodiments, the first pressing member is a rotatable rolling member or a sphere, and the rolling member is a roller or a bearing; and / or, the first elastic member is a spring.

[0009] In some embodiments, the first pressing member is a sphere. The first elastic pressing member further includes a movable rod. One end of the movable rod is slidably inserted through the adsorption arm and connected to the sphere, and the other end is exposed outside the adsorption arm and a limiting protrusion is formed at this end. The first elastic member is sleeved on the movable rod between the sphere and the adsorption arm; or,

[0010] The first elastic pressing member is a ball head plunger; or,

[0011] The first elastic pressing member further includes a connecting rod and a rotating shaft. One end of the connecting rod is connected to the adsorption arm. The rotating shaft is slidably connected to the connecting rod. The first pressing member is rotatably connected to the rotating shaft. The first elastic member is sleeved on the connecting rod.

[0012] In some embodiments, first adsorption holes for adsorbing the film are formed at the free ends of both adsorption arms;

[0013] The film winding mechanism further includes a negative pressure providing mechanism. The negative pressure providing mechanism is communicated with the first adsorption holes to provide negative pressure for adsorbing the film to the first adsorption holes.

[0014] In some embodiments, the film winding mechanism further includes a second elastic pressing member. The second elastic pressing member is arranged between the two adsorption arms;

[0015] When the battery cell and the film enter the space between the two adsorption arms, the first elastic pressing member is used to elastically press the film from the opposite sides of the battery cell in a direction perpendicular to the two adsorption arms to bend and tightly attach the film to the battery cell. The second elastic pressing member is used to elastically press the film in a direction parallel to the two adsorption arms to tightly attach the film to the battery cell.

[0016] In some embodiments, the second elastic pressing member includes a second pressing member and a second elastic member. The second elastic member is connected to one end of the second pressing member to drive the second pressing member to telescopically move relative to the adsorption arm in a direction parallel to the adsorption arm. The end of the second pressing member away from the second elastic member is used to tightly attach the film to the battery cell under the elastic force of the first elastic member.

[0017] In some embodiments, a second adsorption hole for adsorbing the film is formed at the end of the second pressing member away from the second elastic member; and / or

[0018] When the second elastic member is in a natural state, the end of the second pressing member away from the second elastic member is flush with the free ends of the two adsorption arms.

[0019] In some embodiments, the film winding mechanism further includes a driving mechanism. The driving mechanism is connected to the two adsorption arms of the film winding mechanism to drive the two adsorption arms to move horizontally, so that the film adsorbed by the film winding mechanism bends and adheres to the battery cell.

[0020] Another aspect of the present utility model provides a film winding machine, which includes:

[0021] A battery cell clamping mechanism for clamping a battery cell;

[0022] The rubber winding mechanism as described above is used to adsorb the film and bend and attach the adsorbed film to the battery cell clamped by the battery cell clamping mechanism.

[0023] Different from the related art, when using the rubber winding mechanism of the technical solution of the present invention to perform rubber winding and attachment on the battery cell, after the battery cell enters the interval between the two adsorption arms with the rubber winding, it first contacts the first elastic pressing member. When the battery cell further enters the interval between the two adsorption arms, the battery cell will push away the first elastic pressing member in contact with it and be clamped between the two first elastic pressing members. When the battery cell moves further, the first elastic pressing member bends and presses the film tightly against the battery cell. Since the first elastic pressing member elastically presses against the battery cell, the acting force exerted by the first elastic pressing member on the battery cell is variable. Therefore, even if the interval between the two first elastic pressing members is smaller than the thickness of the battery cell, the surface of the battery cell will not be scratched. In addition, during the process of attaching the rubber winding, since the first elastic pressing member always maintains an elastically pressing state with the battery cell, the film can be more tightly attached to the battery cell, effectively avoiding the phenomenon of rubber winding wrinkling. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the rubber winding mechanism according to an embodiment of the present invention;

[0025] Figure 2 is Figure 1 the front view of the rubber winding mechanism in

[0026] Figure 3 is the front view of the rubber winding mechanism according to another embodiment of the present invention;

[0027] Figure 4 is the front view of the rubber winding mechanism according to still another embodiment of the present invention;

[0028] Figure 5 is the front view of the rubber winding mechanism according to yet another embodiment of the present invention.

[0029] Explanation of the Reference Numerals in the Drawings:

[0030] Adsorption arm 100; First adsorption hole 110; First elastic pressing member 200; First pressing member 210; First elastic member 220; Connecting rod 230; Movable rod 250; Limit protrusion 251; Fixed sphere 260; Pressing roller 270; Second elastic pressing member 300; Second pressing member 310; Second elastic member 320; Second adsorption hole 311.

[0031] The realization, functional characteristics and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiments

[0032] Next, the solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back, top, bottom, side...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] It should also be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0035] In addition, the descriptions involving "first", "second", etc. in the embodiments of the present utility model are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features.

[0036] In view of the technical defects existing in the related art, this embodiment provides a rubber winding mechanism for adsorbing a film and attaching the film to an electric core. As Figure 1 shown, the rubber winding mechanism of this embodiment includes two adsorption arms 100 arranged oppositely at intervals, a negative pressure providing mechanism, and a driving mechanism. The free ends of the two adsorption arms 100 are both formed with first adsorption holes 110 for adsorbing the film. The negative pressure providing mechanism is communicated with the first adsorption holes 110 to provide negative pressure for adsorbing the film to the first adsorption holes 110, so that the adsorption arms 100 are used to adsorb the film. The driving mechanism is connected to the two adsorption arms 100 and is used to drive the two adsorption arms 100 to move horizontally so that the two adsorption arms 100 approach the electric core.

[0037] Wherein, on one side of each adsorption arm 100 of this embodiment facing the other adsorption arm 100, a first elastic pressing member 200 protrudes. When the rubber winding mechanism of this embodiment is used for winding and attaching the electric core, after the electric core with the wound rubber enters the interval between the two adsorption arms 100, it contacts the first elastic pressing member 200.

[0038] Optionally, the first elastic pressing member 200 is a single component, for example, an elastic member made of an elastic material such as silica gel or rubber. When the battery cell contacts the first elastic pressing member 200 and continues to extend, it will squeeze the first elastic pressing member 200, causing the first elastic pressing member 200 to deform elastically, so that the movement of the battery cell is not blocked by the first elastic pressing member 200. At this time, the battery cell and the film are clamped between two first elastic pressing members 200. When the battery cell moves further, the first elastic pressing member 200 bends the film and presses it tightly against the battery cell.

[0039] Of course, the first elastic pressing member 200 can also be a composite component. For example, the first elastic pressing member 200 includes a pressing member and an elastic member connected to the pressing member, and the pressing member is connected to the adsorption arm 100 through the elastic member. When the battery cell contacts the first elastic pressing member 200 and continues to extend, it will push open the first elastic pressing member 200, so that the first elastic pressing member 200 creates enough space for the battery cell to move, so that the movement of the battery cell is not blocked by the first elastic pressing member 200. At this time, the battery cell and the film are clamped between two first elastic pressing members 200. When the battery cell moves further, the first elastic pressing member 200 bends the film and presses it tightly against the battery cell.

[0040] In the above two optional examples, the first elastic pressing member 200 is used to elastically press against the film when the battery cell and the film enter the space between the two adsorption arms 100 to bend and press the film tightly against the battery cell. Since the first elastic pressing member 200 elastically presses against the battery cell, the force exerted by the first elastic pressing member 200 on the battery cell is variable. Therefore, even if the distance between the two first elastic pressing members 200 is smaller than the thickness of the battery cell, the surface of the battery cell will not be scratched. Moreover, during the process of pasting the film, since the first elastic pressing member 200 always maintains an elastically pressing state with the battery cell and the film, the film can be more tightly attached to the battery cell to ensure the stability of the battery cell. Therefore, as long as the distance between the two first elastic pressing members in the natural state is not greater than the thickness of the battery cell, the battery cell can be stably and safely wound with the film.

[0041] Continue to refer to as Figure 1As shown, the first elastic pressing member 200 includes a first pressing member 210 and a first elastic member 220. The first elastic member 220 is disposed between the first pressing member 210 and the adsorption arm 100 to drive the first pressing member 210 to telescopically move relative to the adsorption arm 100 in a direction perpendicular to the adsorption arm 100. For example, when the battery cell enters the space between the two adsorption arms 100 with the winding tape, the first pressing member 210 is pushed away by the battery cell in a direction perpendicular to the adsorption arm 100 to create a moving space for the battery cell. The first pressing member 210 is used to press the film tightly against the battery cell under the elastic force of the first elastic member 220. When the first pressing member 210 is pushed away by the battery cell, the first elastic member 220 is in an elastically deformed state. At this time, the elastic restoring force of the first elastic member 220 acts on the first pressing member 210, causing the first pressing member 210 to press the film on the battery cell, thereby tightly attaching the film to the battery cell.

[0042] In some embodiments, as Figure 2 shown, the first elastic pressing member 200 further includes a movable rod 250, and the first pressing member 210 is a fixed sphere 260. One end of the movable rod 250 slidably penetrates between the two adsorption arms 100 and is connected to the fixed sphere 260, and the other end is exposed outside the two adsorption arms 100 and a limiting protrusion 251 is formed at this end. The movable rod 250 movably penetrates through the adsorption arm 100. The limiting protrusion 251 is used to limit the movement of the movable rod 250 towards the other adsorption arm 100 to prevent the movable rod 250 from detaching from the adsorption arm 100. Among them, the first elastic member 220 is a spring, and the first elastic member 220 is sleeved on the movable rod 250 between the fixed sphere 260 and the limiting adsorption arm 100. One end of the first elastic member 220 is connected to the fixed sphere 260, and the other end is connected to the adsorption arm 100, thereby forming a telescopic first elastic pressing member 200. Of course, the first elastic member 220 can also be sleeved on the movable rod 250 according to actual needs. Since the smooth spherical surface of the fixed sphere 260 can avoid scratching the surface of the battery cell when the fixed sphere 260 contacts the battery cell.

[0043] In some embodiments, as Figure 3As shown, the first elastic pressing member 200 includes a movable rod 250, and the first pressing member 210 is a pressing roller 270. The movable rod 250 slidably passes through the adsorption arm 100. One end of the movable rod 250 facing the other adsorption arm 100 has a connecting shaft, and the pressing roller 270 is rotatably connected to the connecting shaft. And a limiting protrusion 251 formed along the circumferential direction of the movable rod 250 is provided at the end of the movable rod 250 facing away from the other adsorption arm 100. The limiting protrusion 251 is used to limit the movement of the movable rod 250 towards the other adsorption arm 100. Among them, the first elastic member 220 is a spring. The first elastic member 220 is located between the connecting shaft and the adsorption arm 100, and both ends of the first elastic member 220 are respectively connected to the connecting shaft and the adsorption arm 100, thereby forming a telescopic first elastic pressing member 200. Of course, according to actual needs, the first elastic member 220 can also be sleeved on the movable rod 250.

[0044] In some embodiments, the first pressing member 210 is a rotatable rolling member, and the rolling member is a ball or a roller or a bearing. And the first elastic member 220 is a spring. Optionally, as Figure 4 shown, when the rolling member is a ball, the first elastic pressing member 200 is a ball plunger. When using a ball plunger, the smooth spherical surface of the ball plunger ball contacts the battery cell, thereby avoiding scratching the surface of the battery cell.

[0045] As Figure 5 shown, when the rolling member is a roller or a bearing, the first elastic pressing member 200 further includes a connecting rod 230 and a rotating shaft. Among them, one end of the connecting rod 230 is connected to the adsorption arm 100, and the rotating shaft is slidably connected to the connecting rod 230. The first pressing member 210 is rotatably connected to the rotating shaft, that is to say, a roller or a bearing can be connected to the rotating shaft. The first elastic member 220 is sleeved on the connecting rod 230, and one end of the first elastic member 220 is connected to the rotating shaft, and the other end is connected to the connecting rod 230 or the adsorption arm 100. Thus, when the roller or the bearing is pushed away by the battery cell, the first elastic member 220 undergoes elastic deformation, thereby applying an elastic restoring force to the roller or the bearing, so that the roller or the bearing presses the film tightly against the battery cell under the elastic force of the first elastic member 220. Since the rolling member is a roller or a bearing, the battery cell receives rolling friction during the gluing process, reducing the friction between the battery cell and the first pressing member 210, thereby reducing the possibility of wrinkles on the surface of the battery cell.

[0046] In some embodiments, as Figure 1As shown, the glue winding mechanism further includes a second elastic pressing member 300, which is disposed between two adsorption arms 100. When using the glue winding mechanism of this embodiment to perform glue winding and fitting of the battery cell, after the battery cell and the film enter the space between the two adsorption arms 100, the first elastic pressing member 200 is used to elastically press the film from the opposite sides of the battery cell in a direction perpendicular to the two adsorption arms 100 to bend and press the film against the battery cell. The second elastic pressing member 300 is used to elastically press the film in a direction parallel to the two adsorption arms 100 to press the film against the battery cell, so that both the side and the bottom of the battery cell can be tightly attached to the film, further improving the stability of the battery cell.

[0047] Further, as Figure 1 shown, the second elastic pressing member 300 includes a second pressing member 310 and a second elastic member 320. The second elastic member 320 is connected to one end of the second pressing member 310 to drive the second pressing member 310 to move relative to the adsorption arm 100 in a direction parallel to the adsorption arm 100, and the end of the second pressing member 310 away from the second elastic member 320 is used to press the film against the battery cell under the elastic force of the first elastic member 220. For example: when the battery cell enters the space between the two adsorption arms 100 with the glue winding and continues to move after contacting the second pressing member 310, the second pressing member 310 is pushed away by the battery cell in a direction parallel to the adsorption arm 100, causing the second elastic member 320 to undergo elastic deformation. At this time, the elastic restoring force of the second elastic member 320 is applied to the second pressing member 310, causing the second pressing member 310 to press the film on the bottom of the battery cell, thereby tightly attaching the film to the bottom of the battery cell.

[0048] Further, as Figure 1 shown, a second adsorption hole 311 for adsorbing the film is formed at the end of the second pressing member 310 away from the second elastic member 320. The negative pressure providing mechanism is also communicated with the second adsorption hole 311 to provide negative pressure for the second adsorption hole 311 to adsorb the film. When using the glue winding mechanism of this embodiment to perform glue winding, in addition to using the two adsorption arms 100, the film is also adsorbed by the second pressing member 310, so that the film is more stably adsorbed on the glue winding mechanism, thereby preventing problems such as the film being attached offset.

[0049] In the natural state of the second elastic member 320 of this embodiment, that is, when there is no relative movement between the second elastic member 320 and the adsorption arm 100, the end of the second pressing member 310 away from the second elastic member 320 is flush with the free ends of the two adsorption arms 100, so that the second adsorption hole 311 and the first adsorption hole 110 of the adsorption arm 100 are coplanar, further improving the glue adsorption stability of the glue winding mechanism.

[0050] In some embodiments, a rubber winding machine is provided. The rubber winding machine includes a battery cell clamping mechanism and the rubber winding mechanism provided in the above embodiments. The battery cell clamping mechanism is used to clamp the battery cell to position the battery cell. The two adsorption arms 100 of the rubber winding mechanism adsorb the film and approach the battery cell under the action of the driving mechanism, so that after the battery cell contacts the film, they enter the interval between the two adsorption arms 100 together, so that the film adsorbed by the two adsorption arms 100 is bent and attached to the battery cell.

[0051] Since the rubber winding machine of this embodiment adopts the rubber winding mechanism of the above embodiment, when winding and attaching the battery cell, since the first elastic pressing member 200 elastically presses against the battery cell, the force applied by the first elastic pressing member 200 on the battery cell is variable. Therefore, even if the interval between the two first elastic pressing members 200 is smaller than the thickness of the battery cell, the surface of the battery cell will not be scratched, and thus the battery cell can be wound with rubber stably and safely.

[0052] The above are only partial or preferred embodiments of the present invention. Whether in terms of text or drawings, the scope of protection of the present invention cannot be limited thereby. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the overall concept of the present invention, or direct / indirect application in other related technical fields is included in the scope of protection of the present invention.

Claims

1. A glue winding mechanism, used for adsorbing a film and attaching the film to a battery core, the glue winding mechanism comprises two adsorption arms, the two adsorption arms are arranged opposite to each other at a distance for adsorbing the film, characterized in that: A first elastic pressing component is protruding from one side of each adsorption arm facing the other adsorption arm, and the first elastic pressing component is used to elastically press the film when the battery cell and the film enter the gap between the two adsorption arms to bend the film and press it tightly against the battery cell.

2. The adhesive wrapping mechanism according to claim 1, characterized in that: The first elastic pressing member includes a first pressing piece and a first elastic piece, wherein the first elastic piece is arranged between the first pressing piece and the adsorption arm, and the first pressing piece is used to press the film tightly against the battery core under the elastic force of the first elastic piece.

3. The adhesive wrapping mechanism according to claim 2, characterized in that: The first pressing member is a rotatable rolling component or a sphere, and the rolling component is a roller or a bearing; and / or the first elastic member is a spring.

4. The adhesive wrapping mechanism according to claim 2 or 3, characterized in that: The first pressing member is a sphere, the first elastic pressing member further comprises a movable rod, one end of the movable rod is slidably inserted into the adsorption arm and connected to the sphere, the other end is exposed outside the adsorption arm and a limited position protrusion is formed on the end, and the first elastic member is sleeved on the movable rod and located between the sphere and the adsorption arm; or, The first elastic pressing member is a ball plunger; or, The first elastic pressing component also includes a connecting rod and a rotating shaft, one end of the connecting rod is connected to the adsorption arm, the rotating shaft is slidably connected to the connecting rod, the first pressing member is rotatably connected to the rotating shaft, and the first elastic member is sleeved on the connecting rod.

5. The adhesive wrapping mechanism according to claim 1, characterized in that: The free ends of the two adsorption arms are both formed with first adsorption holes for adsorbing the film; The adhesive winding mechanism further includes a negative pressure providing mechanism, which is communicated with the first adsorption hole to provide the first adsorption hole with negative pressure for adsorbing the film.

6. The adhesive wrapping mechanism according to any one of claims 1 to 3 or 5, characterized in that: The adhesive wrapping mechanism further includes a second elastic pressing member, and the second elastic pressing member is arranged between the two adsorption arms; When the battery cell and the film enter the gap between the two adsorption arms, the first elastic pressing member is used to elastically press the film from opposite sides of the battery cell in a direction perpendicular to the two adsorption arms to bend the film and press it tightly against the battery cell, and the second elastic pressing member is used to elastically press the film in a direction parallel to the two adsorption arms to press the film tightly against the battery cell.

7. The adhesive wrapping mechanism according to claim 6, characterized in that: The second elastic pressing member includes a second pressing member and a second elastic member. The second elastic member is connected to one end of the second pressing member to drive the second pressing member to telescopically move relative to the adsorption arm in a direction parallel to the adsorption arm. The end of the second pressing member away from the second elastic member is used to press the film tightly against the battery cell under the elastic force of the first elastic member.

8. The adhesive wrapping mechanism according to claim 7, characterized in that: A second adsorption hole for adsorbing the film is formed at one end of the second pressing member away from the second elastic member; and / or When the second elastic member is in a natural state, one end of the second pressing member away from the second elastic member is flush with the free ends of the two adsorption arms.

9. The adhesive wrapping mechanism according to claim 7, characterized in that: The glue winding mechanism also includes a driving mechanism, which is connected to the two adsorption arms of the glue winding mechanism to drive the two adsorption arms to move horizontally, so that the film adsorbed by the glue winding mechanism is bent and attached to the battery core.

10. A rubber winding machine, characterized in that: include: A battery cell clamping mechanism, the battery cell clamping mechanism is used to clamp the battery cell; The glue winding mechanism as described in any one of claims 1 to 9 is used to absorb the glue sheet and bend the absorbed glue sheet to fit it on the battery cell clamped by the battery cell clamping mechanism.

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