Gluing device and battery production line

Abstract

The utility model discloses a rubberizing device and a battery production line. The rubberizing device is used for rubberizing an electrode assembly and comprises a tab rubberizing mechanism, the tab rubberizing mechanism comprises a first rubberizing part and a second rubberizing part, and the second rubberizing part is used for keeping a rubber strip and moves in a first direction to attach the rubber strip to the surface of a tab of the electrode assembly; the first rubberizing part is movably connected with the second rubberizing part and can move relative to the second rubberizing part in the second direction, and the second direction intersects with the first direction. The first rubberizing part can avoid the tab under the action of the tab, so that the situation that the first rubberizing part directly extrudes the inclined surface of the tab can be reduced, the damage to the tab is reduced, the rubberizing quality is improved, and the reliability of the battery is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a glue sticking device and a battery production line. Background Art

[0002] In the manufacturing process of lithium batteries, the tab welding process is extremely important, as it directly affects the electrical performance of the battery. The tab is welded to the cover plate adapter by ultrasonic welding. After welding, to prevent the welding particles from falling off, the tab is often protected by glue. The existing glue sticking equipment is prone to damage the tab during glue sticking, which has certain limitations. Utility Model Content

[0003] In view of the above problems, the present application provides a glue pasting device and a battery production line to improve the glue pasting quality.

[0004] The first aspect of the present application provides a gluing device for gluing an electrode assembly, including a pole ear gluing mechanism, the pole ear gluing mechanism including a first gluing portion and a second gluing portion, the second gluing portion being used to hold a glue strip and moving in a first direction to attach the glue strip to the surface of the pole ear of the electrode assembly; the first gluing portion is movably connected to the second gluing portion and is movable relative to the second gluing portion along a second direction, the second direction intersecting the first direction.

[0005] The first adhesive part contacts the root of the tab and forms a mutual extrusion effect. Under the extrusion effect of the inclined surface of the root of the tab, the first adhesive part gradually approaches the second adhesive part. In other words, the first adhesive part can avoid the tab under the action of the tab, which can reduce the direct extrusion of the inclined surface of the tab by the first adhesive part, reduce the damage to the tab, improve the adhesive quality, and ensure the reliability of the battery.

[0006] In some embodiments, the gluing device also includes a bracket and a main body gluing mechanism, and the tab gluing mechanism is arranged on the bracket; the main body gluing mechanism is arranged on the bracket and is used to glue the main body of the electrode assembly, and the same side of the tab gluing mechanism and the main body gluing mechanism facing the electrode assembly are used together to adsorb the glue strip, and the tab gluing mechanism and the main body gluing mechanism are movable in a first direction to attach the glue strip to the surface of the main body and the surface of the tab, and the second direction is perpendicular to the first direction.

[0007] This arrangement can ensure the synchronization of the movement of the main body glue sticking mechanism and the pole ear glue sticking mechanism, and ensure that the glue strip is more evenly attached to the main body and the pole ear.

[0008] In some embodiments, the glue sticking device has an initial glue absorption state. In the initial glue absorption state, the sides of the main body glue sticking mechanism and the pole ear glue sticking mechanism for adsorbing the glue strip are roughly flush, and the main body glue sticking mechanism and the pole ear glue sticking mechanism are configured to jointly adsorb a single glue strip, the pole ear glue sticking mechanism is fixedly connected to the bracket, the main body glue sticking mechanism is movably connected to the bracket, and the main body glue sticking mechanism and the pole ear glue sticking mechanism are relatively movable in a first direction.

[0009] During the gluing process, the gluing device first relies on negative pressure to absorb a single rubber strip on the lower side before gluing, and the rubber strip extends from the main body gluing mechanism to the pole ear gluing mechanism along the second direction. When the gluing device moves toward the main body for gluing, the main body gluing mechanism and the pole ear gluing mechanism move synchronously along the first direction. Since the pole ear is lower than the large surface of the main body in the first direction, the main body gluing mechanism first contacts the large surface of the main body. When the main body gluing mechanism moves to contact the main body, the main body gluing mechanism presses a part of the rubber strip on the surface of the main body. At this time, the pole ear gluing mechanism and the main body gluing mechanism are located on the same plane, that is, a part of the rubber strip contacts the large surface of the main body, and the rest of the rubber strip is in a suspended state. At this time, the main body gluing mechanism remains stationary to firmly press a part of the rubber strip on the large surface of the main body. Subsequently, the tab glue sticking mechanism continues to move in the first direction to drive the suspended part of the rubber strip to continue to approach the tab, so that the suspended part of the rubber strip is bent and stuck to the surface of the tab, so as to be well stuck to the turning point between the large surface and the top surface of the main body. As the tab glue sticking mechanism moves further, the rubber strip contacts the inclined surface of the root of the tab, and is smoothly stuck to the surface of the tab under the action of the first glue sticking part and the first elastic member. Therefore, such a setting can significantly improve the glue sticking quality.

[0010] In some embodiments, the gluing device also includes a guide rod and a second elastic member, the guide rod passes through the bracket, the main body gluing mechanism is connected to an end of the guide rod close to the main body, and the two ends of the second elastic member are respectively abutted against the bracket and the main body gluing mechanism, and the bracket is used to receive the force toward the main body to drive the main body gluing mechanism and the ear gluing mechanism to move.

[0011] After the lugs are glued to the tabs, the bracket is no longer subjected to force, and the elastic force of the second elastic member resets the bracket, thereby moving the tab glue sticking mechanism away from the tabs. This eliminates the need to actively drive the tab glue sticking mechanism away from the tabs, thereby improving the intelligence of the glue sticking process, simplifying the control steps, and increasing convenience.

[0012] In some embodiments, the tab adhesive bonding mechanism further includes a first elastic member, and the first elastic member is disposed between the first adhesive bonding portion and the second adhesive bonding portion.

[0013] The first elastic member is arranged between the first adhesive part and the second adhesive part, and the elastic force of the first elastic member can be used to cause the first adhesive part to reset after displacement, and when the first adhesive part is compressed by the inclined surface of the pole ear, the elastic force of the first elastic member enables the first adhesive part to fit closely to the surface of the pole ear, so that the rubber strip fits more firmly to the surface of the pole ear, reduces the risk of excessive gap between the rubber strip and the pole ear, and improves the quality of adhesive bonding. Moreover, after the adhesive bonding is completed, the pole ear adhesive bonding mechanism moves away from the main body along the first direction, and the first adhesive part is no longer affected by the inclined surface of the pole ear. The elastic force of the first elastic member can automatically reset the first adhesive part, which improves the convenience of the next adhesive bonding and improves the adhesive bonding efficiency.

[0014] In some embodiments, the tab glue mechanism further includes an installation cavity, which is disposed in the second glue portion, wherein a portion of the first elastic member is located in the installation cavity, and an end portion of the first elastic member extends from the installation cavity and is connected to the first glue portion.

[0015] By providing a mounting cavity in the second adhesive portion, the space occupied by the first elastic member can be reduced, so that the first adhesive portion and the second adhesive portion can be as close to each other as possible, thereby making the various components in the tab adhesive mechanism more compact.

[0016] In some embodiments, the first elastic member includes a spring. The use of the spring can advantageously achieve movement and reset of the first adhesive portion and can reduce costs.

[0017] In some embodiments, the tab adhesive mechanism further comprises a long hole extending in the second direction, the long hole is arranged on the second adhesive portion, and the first adhesive portion is configured to be movable in the second direction through the long hole. Using a spring can reduce costs.

[0018] In some embodiments, a portion of the first adhesive portion facing the main body of the electrode assembly is arc-shaped.

[0019] The first adhesive bonding part is partially configured as a smooth arc-shaped structure, which can significantly reduce the damage to the tab during the adhesive bonding process, improve the reliability of the adhesive bonding process, and thus improve the adhesive bonding quality. It can also improve the adaptability of the first adhesive bonding part to tabs of different morphologies, so that it can smooth the adhesive strip and reduce scratches on the tab surface.

[0020] In some embodiments, the tab extends from the top surface of the main body along the second direction, and the arc-shaped portion of the first adhesive portion is configured to be tangent to the top surface of the main body in the process of approaching the tab along the first direction.

[0021] When gluing the main body, the rubber strip is usually extended from the large surface of the main body to the top surface of the main body. By making the arc-shaped part of the first glue-applying part tangent to the top surface of the main body, it can be ensured that the rubber strip can remain as close to the main body as possible without any gap when turning from the large surface to the top surface, thereby improving the quality of gluing.

[0022] In some embodiments, the first adhesive application portion includes a rotatable roller.

[0023] During the process of gluing the tabs, the first gluing part rotates around its own axis under the push of the tabs. This arrangement can flatten the surface of the rubber strip by the rotation of the roller of the first gluing part, thereby reducing wrinkles and improving the gluing quality.

[0024] A second aspect of the present application provides a battery production line, comprising the glue sticking device as described above.

[0025] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0027] Figure 1 It is a three-dimensional schematic diagram of the glue sticking device of some embodiments of the present application.

[0028] Figure 2 This is a front view of the glue sticking device of some embodiments of the present application.

[0029] Figure 3 1 is a top view of the adhesive laminating device of some embodiments of the present application.

[0030] Figure 4 It is a left view of the glue sticking device of some embodiments of the present application.

[0031] Figure 5 It is a schematic diagram of the structure of the glue sticking device of some embodiments of the present application.

[0032] Figure 6 It is a schematic diagram of the internal structure of the first adhesive portion and the second adhesive portion of some embodiments of the present application.

[0033] The figures are as follows:

[0034] 1. Tab gluing mechanism; 11. First gluing portion; 12. Second gluing portion; 13. First elastic member; 14. Long hole; 15. Mounting cavity; 16. Press rod;

[0035] 2. Glue sticking mechanism of the main body;

[0036] 3. Bracket;

[0037] 4. Guide rod;

[0038] 5. A second elastic member;

[0039] A, pole ear; B, main body; X, second direction; Y, first direction; Z, third direction. DETAILED DESCRIPTION

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0041] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0042] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0043] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0044] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0045] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0046] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0047] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0048] In the production process of power batteries, it is usually necessary to apply glue to the main body B and the tab A of the electrode assembly. Applying glue can reduce the particle shedding in the weld area, thereby reducing the risk of the shed particles entering the electrode assembly and causing a physical short circuit. Studies have found that the current glue application equipment is prone to defects such as tab fracturing, glue wrinkles, and a large gap between the glue and the tab surface when applying glue. For this reason, some embodiments of the present application provide a glue application device for applying glue to an electrode assembly. Reference Figure 1 and 2 The gluing device includes a tab gluing mechanism 1. The tab gluing mechanism 1 includes a first gluing portion 11 and a second gluing portion 12. The second gluing portion 12 is used to hold the glue strip and move in a first direction Y to attach the glue strip to the surface of the tab A of the electrode assembly. The first gluing portion 11 is movably connected to the second gluing portion 12 and is movable relative to the second gluing portion 12 along a second direction X. The second direction X intersects with the first direction Y.

[0049] , for the convenience of the following description, some structural examples of the electrode assembly are first described. In this example, the electrode assembly includes a main body B and a tab A. The main body B is a rectangular parallelepiped structure. The tab A is arranged on the top surface of the main body B (the top surface of the main body B refers to the surface perpendicular to the large surface of the main body B. For the main body B, it has a large surface, a small surface and a side surface. The large surface refers to the surface composed of length and width, the small surface refers to the surface composed of width and height, the side surface refers to the surface composed of length and height, and the top surface is the small surface) and extends relative to the main body B along the second direction X. In the thickness direction of the main body B, the tab A is located at one end of the top surface of the main body B, and the thickness of the tab A gradually decreases from the part of the tab A close to the top surface of the main body B (the root of the tab) to the end of the tab A away from the main body B (the top of the tab). In other words, the surface of the tab A is an inclined surface.

[0050] Specifically, the first direction Y is consistent with the thickness direction of the main body B. The first glue portion 11 and the second glue portion 12 are arranged side by side in the second direction X. The first glue portion 11 is closer to the main body B than the second glue portion 12. The first glue portion 11 is used to press the glue strip held by the second glue portion 12 on the surface of the pole lug A during the process of gluing the pole lug A, and move relative to the second glue portion 12 along the second direction X under the pushing action of the pole lug A. A negative pressure suction head is provided on the lower side of the pole lug gluing mechanism 1, or in other words, on one side of the pole lug gluing mechanism 1 close to the main body B or the pole lug A in the first direction Y. The negative pressure suction head can generate negative pressure to absorb the glue strip, and the pole lug gluing mechanism 1 is close to the main body B or the pole lug A along the first direction Y to achieve gluing.

[0051] Since the root of the pole tab A is an inclined surface, in the process of the pole tab gluing mechanism 1 approaching the pole tab A, the first gluing portion 11 contacts the root of the pole tab A and forms a mutual extrusion effect. Under the extrusion effect of the inclined surface of the root of the pole tab A, the first gluing portion 11 gradually approaches the second gluing portion 12. In other words, the first gluing portion 11 can avoid the pole tab A under the action of the pole tab A, which can reduce the direct extrusion of the inclined surface of the pole tab A by the first gluing portion 11, thereby increasing the matching degree of the pole tab gluing mechanism 1 to the surface morphology of the pole tab A, reducing the damage to the pole tab A, improving the gluing quality, and ensuring the reliability of the battery.

[0052] On the other hand, since the first glue portion 11 can adaptively adjust its position according to the shape of the pole ear A during the glue laminating process, the requirements for the accuracy of adjusting the distance between the first glue portion 11 and the second glue portion 12 before glue laminating are reduced, the difficulty of machine adjustment is reduced, and the adaptability of the glue laminating device to different pole ears is improved.

[0053] In some embodiments, the width of the first glue-applying portion 11 is greater than the width of the tab A and the glue strip, so that glue absorption and glue-applying can be completed better, thereby ensuring the quality of glue-applying.

[0054] In some embodiments, the gluing device further includes a bracket 3 and a main body gluing mechanism 2. The tab gluing mechanism 1 is disposed on the bracket 3. The main body gluing mechanism 2 is disposed on the bracket 3 and is used to glue the main body B of the electrode assembly. The same side of the tab gluing mechanism 1 and the main body gluing mechanism 2 facing the electrode assembly is used to adsorb the adhesive strip, and the tab gluing mechanism 1 and the main body gluing mechanism 2 are movable in the first direction Y to attach the adhesive strip to the surface of the main body B and the surface of the tab A. The second direction X is perpendicular to the first direction Y.

[0055] Specifically, the second direction X is parallel to the large surface of the main body B. The bracket 3 is used to receive the force toward the main body B to drive the main body glue sticking mechanism 2 and the tab glue sticking mechanism 1 to move synchronously. This arrangement can ensure the synchronization of the movement of the main body glue sticking mechanism 2 and the tab glue sticking mechanism 1, and ensure that the rubber strip is more evenly attached to the main body B and the tab A.

[0056] In some embodiments, the glue sticking device has an initial glue absorption state. In the initial glue absorption state, the main body glue sticking mechanism 2 and the side of the tab glue sticking mechanism 1 for adsorbing the glue strip are roughly flush, and the main body glue sticking mechanism 2 and the tab glue sticking mechanism 1 are configured to jointly adsorb a single glue strip. The tab glue sticking mechanism 1 is fixedly connected to the bracket 3, the main body glue sticking mechanism 2 is movably connected to the bracket 3, and the main body glue sticking mechanism 2 and the tab glue sticking mechanism 1 are relatively movable in the first direction Y.

[0057] Specifically, in the process of gluing, the gluing device first relies on negative pressure to absorb a single rubber strip on the lower side before gluing, and the rubber strip extends from the main body gluing mechanism to the tab gluing mechanism along the second direction X. When the gluing device moves toward the main body B for gluing, the main body gluing mechanism 2 and the tab gluing mechanism 1 move synchronously along the first direction Y. Since the tab A is lower than the large surface of the main body B in the first direction Y, the main body gluing mechanism 2 first contacts the large surface of the main body B. When the main body gluing mechanism 2 moves to contact the main body B, the main body gluing mechanism 2 presses a part of the rubber strip on the surface of the main body B. At this time, the tab gluing mechanism 1 and the main body gluing mechanism 2 are located on the same plane, that is, a part of the rubber strip contacts the large surface of the main body B, and the rest of the rubber strip is in a suspended state. At this time, the main body gluing mechanism 2 remains stationary to firmly press a part of the rubber strip on the large surface of the main body B. Subsequently, the tab glue sticking mechanism 1 continues to move along the first direction Y to drive the suspended part of the rubber strip to continue to approach the tab A, so that the suspended part of the rubber strip is bent and stuck to the surface of the tab A, so as to be well stuck to the turning point between the large surface and the top surface of the main body B. As the tab glue sticking mechanism 1 moves further, the rubber strip contacts the inclined surface of the root of the tab A, and is smoothly stuck to the surface of the tab A under the action of the first glue sticking part 11 and the first elastic member 13. Therefore, such a setting can significantly improve the glue sticking quality.

[0058] In some embodiments, the gluing device further includes a guide rod 4 and a second elastic member 5. The guide rod 4 passes through the bracket 3. The main body gluing mechanism 2 is connected to an end of the guide rod 4 close to the main body B. The two ends of the second elastic member 5 are respectively in contact with the bracket 3 and the main body gluing mechanism 2. When the main body gluing mechanism 2 moves to contact with the main body B, the bracket 3 drives the tab gluing mechanism 1 to continue to move along the first direction Y and compress the second elastic member 5.

[0059] Specifically, the bracket 3 is provided with a guide through hole, and the guide rod 4 is penetrated with the guide through hole. When the main body glue mechanism 2 contacts the main body B, the main body glue mechanism 2 remains stationary in the first direction Y. As the bracket 3 moves further, the bracket 3 continues to approach the large surface of the main body B along the first direction Y under the cooperation of the guide through hole and the guide rod 4, and the bracket 3 and the main body glue mechanism 2 move relative to each other, or in other words, the main body glue mechanism 2 no longer moves with the bracket 3, so that the second elastic member 5 is compressed, so that the main body glue mechanism 2 does not move, and the tab glue mechanism 1 moves. In other words, the main body glue mechanism 2 is misaligned with the tab glue mechanism 1. After the tab A is glued, the bracket 3 is no longer subjected to the force, and the elastic force of the second elastic member 5 resets the bracket 3, so that the tab glue mechanism 1 is away from the tab A, without having to actively drive the tab glue mechanism 1 away from the tab A, thereby improving the intelligence of the glue process, simplifying the control steps, and improving convenience.

[0060] refer to Figure 5 and 6 In some embodiments, the tab adhesive bonding mechanism 1 further includes a first elastic member 13. The first elastic member 13 is disposed between the first adhesive bonding portion 11 and the second adhesive bonding portion 12.

[0061] Specifically, a first elastic member 13 is provided between the first adhesive part 11 and the second adhesive part 12, and the elastic force of the first elastic member 13 can be used to cause the first adhesive part 11 to reset after displacement, and when the first adhesive part 11 is compressed by the inclined surface of the pole lug A, the elastic force of the first elastic member 13 enables the first adhesive part 11 to fit tightly to the surface of the pole lug A, so that the adhesive strip fits more firmly to the surface of the pole lug A, reduces the possibility of too large a gap between the adhesive strip and the pole lug, and improves the adhesive quality. Moreover, after the adhesive is completed, the pole lug adhesive mechanism 1 moves away from the main body B along the first direction Y, and the first adhesive part 11 is no longer affected by the inclined surface of the pole lug A. The elastic force of the first elastic member 13 can automatically reset the first adhesive part 11, thereby improving the convenience of the next adhesive application and improving the adhesive application efficiency.

[0062] It is worth understanding that, during the gluing process, the first gluing portion 11 also plays a role in flattening the rubber strip so that the rubber strip can be more evenly attached to the surface of the tab A.

[0063] refer to Figure 5 and 6 In some embodiments, the tab adhesive bonding mechanism 1 further includes a mounting cavity 15. The mounting cavity 15 is disposed in the second adhesive bonding portion 12. A portion of the first elastic member 13 is located in the mounting cavity 15. An end portion of the first elastic member 13 extends from the mounting cavity 15 and is connected to the first adhesive bonding portion 11.

[0064] Specifically, the mounting cavity 15 is constructed to extend along the second direction X, so that the first elastic member 13 also extends along the second direction X. Therefore, when the first adhesive portion 11 squeezes the first elastic member 13 along the second direction X, the compression and reset process of the first elastic member 13 is smoother, which helps to improve the adhesive bonding efficiency.

[0065] By providing the mounting cavity 15 in the second adhesive portion 12, the space occupied by the first elastic member 13 can be reduced, so that the first adhesive portion 11 and the second adhesive portion 12 can be as close to each other as possible, thereby making the various components in the tab adhesive mechanism 1 more compact.

[0066] In some embodiments, the first elastic member 13 includes a spring.

[0067] Specifically, refer to Figure 5 and 6 , one end of the spring abuts against the bottom surface of the cavity of the installation cavity 15, and the other end of the spring abuts against the end of the first adhesive part 11 in the third direction Z (the first direction Y, the second direction X, and the third direction Z are perpendicular to each other). During the adhesive bonding process, the first adhesive part 11 is pushed by the tab A and leans against the second adhesive part 12 in the second direction X, so that the end of the spring abutting against the first adhesive part 11 moves closer to the other end of the spring as the first adhesive part 11 moves, the spring is compressed, and the elastic force increases. After the first adhesive part 11 is separated from the tab A, the spring resets the first adhesive part 11. The use of a spring can advantageously achieve the movement and reset of the first adhesive part 11, and can reduce costs.

[0068] refer to Figure 2 and 6 In some embodiments, the tab adhesive mechanism 1 further includes a long hole 14 extending along the second direction X. The long hole 14 is disposed on the second adhesive portion 12 . The first adhesive portion 11 is configured to be movable along the second direction X through the long hole 14 .

[0069] Specifically, the long hole 14 allows the end of the first adhesive portion 11 to move therein and limits the movement of the first adhesive portion 11, thereby improving the stability of the movement of the first adhesive portion 11, and further enabling the first adhesive portion 11 to move smoothly to adhere the adhesive strip evenly to the surface of the tab A.

[0070] In some embodiments, the tab glue mechanism 1 further includes a pressure rod 16. The pressure rod 16 is disposed on the end of the first glue portion 11 for sliding cooperation with the long hole 14, and the pressure rod 16 extends along the second direction X. The long hole 14 is coaxially disposed with the mounting cavity 15 and is interconnected. The spring sleeve is disposed on the outside of the pressure rod 16, and the pressure rod 16 can improve the stability of the spring when it is deformed, so that the spring is bent as little as possible and only deforms along the second direction X.

[0071] Specifically, when the spring is not compressed, the pressure rod 16 is located in the long hole 14. When the first adhesive part approaches the second adhesive part, part of the pressure rod 16 can move into the installation cavity 15, so that the stroke of the first adhesive part 11 can be increased, and the adaptability of the adhesive device to different sizes of tabs can be improved.

[0072] In some embodiments, the number of the first elastic member 13 , the long hole 14 , the mounting cavity 15 and the pressing rod 16 are all two and symmetrical in the third direction Z. This can improve the stability of the first adhesive portion 11 moving relative to the second adhesive portion 12 .

[0073] In some embodiments, the portion of the first adhesive portion 11 facing the main body portion B is in an arc shape.

[0074] Specifically, a partial area of ​​the first glue laminating portion 11 is constructed into a smooth arc-shaped structure, which can significantly reduce the damage to the tab A during the glue laminating process compared to the square structure in the glue laminating equipment of the related art, improve the reliability of the glue laminating process, and further improve the glue laminating quality.

[0075] It is worth noting that the inclined surface at the root of the pole lug A can be a plane or a curved surface, and for different main parts B, the sizes of the pole lugs A are different, resulting in different morphologies of the inclined surface and the curved surface. By setting the first adhesive part 11 in this way, its adaptability to pole lugs A with different morphologies can be improved, so that it can smooth the adhesive strip and reduce scratches on the surface of the pole lug.

[0076] In some embodiments, the tab A extends from the top surface of the main body B along the second direction X. The arc-shaped portion of the first adhesive portion 11 is configured to be tangent to the top surface of the main body B in the process of approaching the tab A along the first direction Y.

[0077] Specifically, when gluing the main body B, the rubber strip is usually extended from the large surface of the main body B to the top surface of the main body B. By making the arc-shaped part of the first glue-applying part 11 tangent to the top surface of the main body B, it can be ensured that the rubber strip can remain as close to the main body B as possible without generating gaps when turning from the large surface to the top surface, thereby improving the quality of gluing.

[0078] refer to Figure 5 In some embodiments, the first adhesive portion 11 includes a rotatable roller.

[0079] Specifically, during the process of gluing the tab A, the rotatable roller of the first gluing part 11 rotates around its own axis under the push of the tab A. This arrangement can flatten the surface of the rubber strip by the rotation of the roller of the first gluing part 11, thereby reducing wrinkles and improving the gluing quality.

[0080] In some embodiments, the first glue-applying portion 11 is constructed as a round roller, so that the glue strip can be smoothed during the glue-applying process, further reducing the occurrence of wrinkles and reducing damage to the tabs during the glue-applying process.

[0081] Some embodiments of the present application also provide a battery production line, including the glue sticking device as described above.

[0082] Combine the following Figures 1 to 6 A glue application device according to a specific embodiment of the present application is described.

[0083] The gluing device comprises a tab gluing mechanism 1 and a main body gluing mechanism 2. The tab gluing mechanism 1 comprises a first gluing portion 11, a second gluing portion 12, a first elastic member 13 (spring), a long hole 14, a mounting cavity 15 and a pressing rod 16.

[0084] The first adhesive part 11 is a round roller, the bottom surface of the second adhesive part 12 is a plane, and a plurality of negative pressure suction heads are arranged on the bottom surface of the second adhesive part 12, and the negative pressure suction heads adsorb the adhesive strip by generating negative pressure. The long hole 14 and the mounting cavity 15 are both arranged in the second adhesive part 12, and the long hole 14 and the mounting cavity 15 are coaxially arranged and interconnected. A part of the spring is arranged in the mounting cavity 15, and another part of the spring extends from the mounting cavity 15 and is located in the long hole 14. The pressure rod 16 is arranged at the end of the first adhesive part 11 in the third direction Z, and the pressure rod 16, the long hole 14, the mounting cavity 15 and the spring all extend along the second direction X. The bottom surface of the main body adhesive mechanism 2 is also a plane, and a plurality of negative pressure suction heads are also arranged thereon.

[0085] The gluing device also includes a bracket 3, a guide rod 4 and a second elastic member 5. The guide rod 4 passes through the bracket 3. The main body gluing mechanism 2 is connected to one end of the guide rod 4 close to the main body B. The two ends of the second elastic member 5 are respectively in contact with the bracket 3 and the main body gluing mechanism 2. The pole ear gluing mechanism 1 is fixedly connected to the bracket 3. The bracket 3 is used to receive the force toward the main body B to drive the main body gluing mechanism 2 and the pole ear gluing mechanism 1 to move. The gluing device has an initial glue suction state, in which the main body gluing mechanism 2 is flush with the bottom surface of the pole ear gluing mechanism 1, and the glue strip extends from the main body gluing mechanism 2 to the pole ear gluing mechanism 1. During gluing, the bracket 3 drives the main body gluing mechanism 2 and the pole ear gluing mechanism 1 to move synchronously along the first direction Y toward the main body B. When the main body gluing mechanism 2 is in contact with the main body B on a large surface, the bracket 3 drives the pole ear gluing mechanism 1 to continue to move along the first direction Y and compress the second elastic member 5. At this time, a part of the rubber strip is pressed on the large surface of the main body B, and the other part is bent and attached to the top surface of the main body B. As the tab glue sticking mechanism 1 moves further, the bent part of the rubber strip contacts the root of the tab A, and the inclined surface of the root of the tab A pushes the first glue sticking part 11 along the second direction X toward the second glue sticking part 12 and compresses the first elastic member 13. In this process, the elastic force of the first elastic member 13 makes the first glue sticking part 11 closely attached to the surface of the tab A, so that the rubber strip is firmly attached to the surface of the tab A, and the first glue sticking part 11 will also rotate along its own axis to straighten the rubber strip and reduce wrinkles. After the glue sticking is completed, the elastic force of the second elastic member 5 resets the bracket 3, thereby driving the tab glue sticking mechanism 1 to separate from the tab A, and the first glue sticking part 11 is also reset under the elastic force of the first elastic member 13.

[0086] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A glue sticking device for sticking glue to an electrode assembly, characterized in that: The invention comprises a tab glue sticking mechanism (1), wherein the tab glue sticking mechanism (1) comprises a first glue sticking portion (11) and a second glue sticking portion (12), wherein the second glue sticking portion (12) is used to hold a glue strip and to move in a first direction (Y) to attach the glue strip to the surface of the tab (A) of the electrode assembly; the first glue sticking portion (11) is movably connected to the second glue sticking portion (12), and is movable relative to the second glue sticking portion (12) along a second direction (X), wherein the second direction (X) intersects with the first direction (Y).

2. The glue sticking device according to claim 1, characterized in that: The gluing device further comprises a bracket (3) and a main body gluing mechanism (2), wherein the tab gluing mechanism (1) is arranged on the bracket (3); the main body gluing mechanism (2) is arranged on the bracket (3) and is used to glue the main body (B) of the electrode assembly, the same side of the tab gluing mechanism (1) and the main body gluing mechanism (2) facing the electrode assembly are used to adsorb the glue strip, and the tab gluing mechanism (1) and the main body gluing mechanism (2) are movable in the first direction (Y) to attach the glue strip to the surface of the main body (B) and the surface of the tab (A), and the second direction (X) is perpendicular to the first direction (Y).

3. The glue sticking device according to claim 2, characterized in that: The glue sticking device has an initial glue suction state. In the initial glue suction state, the sides of the main body glue sticking mechanism (2) and the tab glue sticking mechanism (1) for adsorbing the glue strip are roughly flush, and the main body glue sticking mechanism (2) and the tab glue sticking mechanism (1) are configured to jointly adsorb a single piece of the glue strip, the tab glue sticking mechanism (1) is fixedly connected to the bracket (3), the main body glue sticking mechanism (2) is movably connected to the bracket (3), and the main body glue sticking mechanism (2) and the tab glue sticking mechanism (1) are relatively movable in a first direction (Y).

4. The glue sticking device according to claim 3, characterized in that: The gluing device further comprises a guide rod (4) and a second elastic member (5), wherein the guide rod (4) passes through the bracket (3), the main body gluing mechanism (2) is connected to an end of the guide rod (4) close to the main body (B), and the two ends of the second elastic member (5) are respectively in contact with the bracket (3) and the main body gluing mechanism (2), and the bracket (3) is used to receive a force acting toward the main body (B) to drive the main body gluing mechanism (2) and the tab gluing mechanism (1) to move.

5. The glue sticking device according to claim 1, characterized in that: The tab adhesive bonding mechanism (1) further comprises a first elastic member (13), wherein the first elastic member (13) is arranged between the first adhesive bonding portion (11) and the second adhesive bonding portion (12).

6. The glue sticking device according to claim 5, characterized in that: The tab glue mechanism (1) further comprises a mounting cavity (15), wherein the mounting cavity (15) is arranged in the second glue portion (12), a portion of the first elastic member (13) is located in the mounting cavity (15), and an end portion of the first elastic member (13) extends out of the mounting cavity (15) and is connected to the first glue portion (11).

7. The glue sticking device according to claim 5, characterized in that: The first elastic member (13) comprises a spring.

8. The adhesive laminating device according to claim 1, characterized in that: The tab adhesive bonding mechanism (1) further comprises a long hole (14) extending along the second direction (X), the long hole (14) being arranged on the second adhesive bonding portion (12), and the first adhesive bonding portion (11) being configured to be movable along the second direction (X) through the long hole (14).

9. The adhesive laminating device according to claim 1, characterized in that: The portion of the first adhesive portion (11) facing the main body portion (B) of the electrode assembly is in an arc shape.

10. The glue sticking device according to claim 9, characterized in that: The tab (A) extends from the top surface of the main body (B) along the second direction (X), and the arc-shaped portion of the first adhesive portion (11) is configured to be tangent to the top surface of the main body (B) in the process of approaching the tab (A) along the first direction (Y).

11. The adhesive laminating device according to claim 1, characterized in that: The first adhesive application portion (11) comprises a rotatable roller body.

12. A battery production line, characterized in that: It comprises a glue sticking device as described in any one of claims 1 to 11.

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