Pole piece processing device and battery production line

Abstract

The utility model provides a pole piece processing device and a battery production line. The pole piece processing device comprises an unwinding mechanism, a winding mechanism, a first rubberizing mechanism, a second rubberizing mechanism and a first roller, the unwinding mechanism is used for providing pole pieces, and the winding mechanism is used for winding the pole pieces. The first rubberizing mechanism and the second rubberizing mechanism are arranged between the unwinding mechanism and the winding mechanism in a spaced mode in the conveying direction of the pole pieces, and the first rubberizing mechanism and the second rubberizing mechanism are used for rubberizing the pole pieces. The first roller is arranged between the first rubberizing mechanism and the second rubberizing mechanism in the conveying direction of the pole piece and used for guiding the pole piece. According to the invention, the risk of cracking of the pole piece in the rubberizing process can be reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a pole piece processing device and a battery production line. Background Art

[0002] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0003] In the preparation of electrode assemblies, it is usually necessary to glue the pole pieces to improve their structural strength. However, during the gluing process, the pole pieces are easily cracked by the force of the gluing mechanism, which directly affects the production efficiency and quality of the electrode assemblies. Therefore, how to reduce the risk of cracking of the pole pieces during the gluing process is an urgent problem to be solved in battery technology. Utility Model Content

[0004] In view of the above problems, the present application provides a pole piece processing device and a battery production line, which can reduce the risk of cracking of the pole piece during the gluing process.

[0005] The embodiment of the present application provides a pole piece processing device, which includes an unwinding mechanism, a winding mechanism, a first gluing mechanism, a second gluing mechanism and a first roller, wherein the unwinding mechanism is used to provide the pole piece, and the winding mechanism is used to wind the pole piece. The first gluing mechanism and the second gluing mechanism are arranged between the unwinding mechanism and the winding mechanism along the conveying direction of the pole piece, and the first gluing mechanism and the second gluing mechanism are used to glue the pole piece. The first roller is arranged between the first gluing mechanism and the second gluing mechanism along the conveying direction of the pole piece, and the first roller is used to guide the pole piece.

[0006] The first roller of the above technical solution can guide the pole piece to pass through its own roller surface, providing a certain transition effect for the pole piece located between the first glue laminating mechanism and the second glue laminating mechanism, and can to a certain extent avoid the pole piece located between the first glue laminating mechanism and the second glue laminating mechanism from being subjected to shear force when the first glue laminating mechanism and the second glue laminating mechanism are misaligned, thereby reducing the risk of cracking of the pole piece during the glue laminating process.

[0007] In some embodiments of the first aspect, the pole piece processing device further includes a second roller, which is disposed between the first roller and the second glue-applying mechanism along the conveying direction of the pole piece. The pole piece includes a first surface and a second surface opposite to each other along its thickness direction, the first roller is used to make the first surface pass through its own roller surface, and the second roller is used to make the second surface pass through its own roller surface.

[0008] The above technical solution introduces the second roller, and the first roller and the second roller can cooperate with each other to jointly guide the smooth transition of the pole piece between the first gluing mechanism and the second gluing mechanism, thereby further reducing the risk of cracking of the pole piece during the gluing process.

[0009] In some embodiments of the first aspect, an axis of the first roller and an axis of the second roller are located in the same horizontal plane.

[0010] The space occupied by the first roller and the second roller in the direction perpendicular to the horizontal plane can be reduced, which is beneficial to improving the overall structural compactness of the pole piece processing device.

[0011] In some embodiments of the first aspect, the pole piece processing device further includes a third roller, which is disposed between the second roller and the second glue laminating mechanism along the conveying direction of the pole piece, and the third roller is used to allow the first surface to pass through its own roller surface.

[0012] The above technical solution introduces a third roller, which cooperates with the first roller and the second roller to further improve the overall stability of the pole piece located between the first gluing mechanism and the second gluing mechanism, thereby further reducing the risk of cracking of the pole piece due to shear force during the gluing process.

[0013] In some embodiments of the first aspect, a feed end of the first roller and a discharge end of the third roller are located at the same horizontal plane.

[0014] The above technical solution can reduce the overall preparation complexity of the electrode processing device, which is conducive to reducing costs.

[0015] In some embodiments of the first aspect, the first gluing mechanism includes a first gluing component and a second gluing component, the first gluing component and the second gluing component are arranged at an interval, a first channel for the electrode sheet to pass through is formed between the first gluing component and the second gluing component, and the first gluing component and the second gluing component are respectively used for gluing both sides of the electrode sheet.

[0016] The first gluing mechanism of the above technical solution can glue both sides of the pole piece respectively, which effectively improves the applicability of the first gluing mechanism.

[0017] In some embodiments of the first aspect, the first adhesive component has a first surface facing the first channel, the second adhesive component has a second surface facing the first channel, and both the first surface and the second surface are parallel to the horizontal plane.

[0018] The above technical solution can effectively improve the gluing quality of the first gluing mechanism by setting the first surface and the second surface to be parallel to the horizontal plane, especially in high-speed gluing operations, and can significantly reduce the formation of bubbles between the protective glue and the pole piece and the risk of protective glue deflection.

[0019] In some embodiments of the first aspect, the first wrap angle A of the first roller satisfies the relationship: 10°≤A≤180°.

[0020] The above technical solution sets the first wrap angle A of the first roller to satisfy the above relationship, thereby meeting the requirement of reducing the risk of the pole piece being subjected to shear force while also reducing the risk of the pole piece being damaged due to excessive friction.

[0021] In some embodiments of the first aspect, the first wrap angle A of the first roller satisfies the relationship: 30°≤A≤90°, which can further improve the effects of reducing the risk of the pole piece being subjected to shear force and reducing the risk of the pole piece being damaged due to excessive friction.

[0022] In some embodiments of the first aspect, the pole piece processing device further includes a driving mechanism, which is connected to the first roller and is used to drive the first roller to move.

[0023] By providing a driving mechanism to drive the first roller to move, the position of the first roller can be freely and flexibly adjusted to adapt to different application environments, thereby improving the setting flexibility and adaptability of the first roller.

[0024] In some embodiments of the first aspect, an elastic layer is provided on the surface of the first roller.

[0025] When the pole piece passes through the first roller, the pole piece is in direct contact with the elastic layer. The elastic layer can quickly deform to a certain extent when subjected to pressure, thereby avoiding rigid contact between the pole piece and the first roller to a certain extent, and further reducing the risk of cracking of the pole piece.

[0026] In a second aspect, the present application provides a battery production line, which includes a pole piece processing device provided in any embodiment of the first aspect.

[0027] 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

[0028] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0029] Figure 1 A schematic diagram of the layout of a pole piece processing device provided in some embodiments of the present application;

[0030] Figure 2 A schematic diagram of a partial structure of a pole piece provided in some embodiments of the present application;

[0031] Figure 3 A schematic diagram of the structure of an electrode assembly provided in some embodiments of the present application;

[0032] Figure 4 A schematic diagram of the layout of another pole piece processing device provided in some embodiments of the present application;

[0033] Figure 5 A schematic diagram of the layout of another pole piece processing device provided in some embodiments of the present application;

[0034] Figure 6 A schematic structural diagram of a first roller provided in some embodiments of the present application.

[0035] The reference numerals in the specific implementation manner are as follows:

[0036] 100, pole piece; 200, protective glue; 300, horizontal surface;

[0037] 10. Unwinding mechanism; 20. Winding mechanism; 30. First gluing mechanism; 31. First pasting component; 311. First pasting surface; 32. Second pasting component; 321. Second pasting surface; 33. First channel; 40. Second gluing mechanism; 50. First roller; 60. Second roller; 70. Third roller; 80. Elastic layer. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0040] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places 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.

[0041] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can 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 application generally indicates that the associated objects before and after are in an "or" relationship.

[0043] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0044] The term "plurality" used in the present application refers to two or more (including two).

[0045] In the present application, the term "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; meanwhile, "vertical" includes not only the absolutely vertical situation, but also the roughly vertical situation conventionally recognized in engineering.

[0046] With the development of battery technology, battery cells are used in more and more fields and are gradually replacing traditional petrochemical energy in the field of automotive power. Battery cells can store chemical energy and controllably convert chemical energy into electrical energy. In recyclable battery cells, the active material can be activated by charging after discharge and continue to be used.

[0047] The battery cell can be but is not limited to a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., and the embodiments of the present application are not limited to this.

[0048] As an example, the battery cell may be, but is not limited to, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery cell, such as a hexagonal battery cell.

[0049] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0050] In some embodiments, the battery may be a battery pack, which includes a battery case and battery cells, wherein the battery cells or battery modules are accommodated in the battery case.

[0051] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0052] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0053] In the preparation of electrode assemblies, it is usually necessary to glue the electrode sheets to improve their structural strength. However, during the gluing process, the electrode sheets are easily cracked due to the force of the gluing mechanism, which directly affects the production efficiency and quality of the electrode assemblies.

[0054] The current electrode processing device is usually equipped with multiple gluing mechanisms along the electrode conveying direction to glue the electrode to improve the gluing efficiency. However, when two adjacent gluing mechanisms along the electrode conveying direction are gluing the electrode, since the gluing mechanisms need to rely on their own movement and apply pressure to the electrode to stick the protective glue to the surface of the electrode, and the movement accuracy of the gluing mechanisms is difficult to control, the movement distances between the two adjacent gluing mechanisms are prone to be asynchronous, resulting in a distance difference, that is, the two adjacent gluing mechanisms are prone to misalignment. Moreover, the gluing mechanism will also drive the electrode to move during the movement process, so that the electrode will be subjected to shear force along the misalignment direction of the two adjacent gluing mechanisms, which makes the electrode prone to cracking.

[0055] For example, two adjacent gluing mechanisms are arranged on the same horizontal plane, and the pole piece passes through the two gluing mechanisms in the horizontal direction. Both gluing mechanisms can move along the thickness direction of the pole piece and glue the surface of the pole piece, and the thickness direction of the pole piece is perpendicular to the horizontal plane. During the gluing process, the two adjacent gluing mechanisms move away from each other in a direction perpendicular to the horizontal plane, and the two gluing mechanisms also drive the pole piece to move during the movement. The pole piece located between the two adjacent gluing mechanisms will be subjected to shear force in a direction perpendicular to the horizontal plane, making the pole piece prone to cracking.

[0056] Based on the above considerations, an embodiment of the present application provides a pole piece processing device, which includes an unwinding mechanism, a winding mechanism, a first gluing mechanism, a second gluing mechanism and a first roller, wherein the unwinding mechanism is used to provide the pole piece, and the winding mechanism is used to wind the pole piece. The first gluing mechanism and the second gluing mechanism are arranged between the unwinding mechanism and the winding mechanism along the conveying direction of the pole piece, and the first gluing mechanism and the second gluing mechanism are used to glue the pole piece. The first roller is arranged between the first gluing mechanism and the second gluing mechanism along the conveying direction of the pole piece, and the first roller is used to guide the pole piece.

[0057] The first roller can guide the pole piece to pass through its own roller surface, providing a certain transition effect for the pole piece located between the first glue laminating mechanism and the second glue laminating mechanism, and can to a certain extent avoid the pole piece located between the first glue laminating mechanism and the second glue laminating mechanism from being subjected to shear force when the first glue laminating mechanism and the second glue laminating mechanism are misaligned, thereby reducing the risk of cracking of the pole piece during the glue laminating process.

[0058] Figure 1 A schematic diagram of the layout of a pole piece processing device provided in some embodiments of the present application, Figure 2 A schematic diagram of a partial structure of a pole piece provided in some embodiments of the present application, Figure 3 A schematic structural diagram of an electrode assembly provided in some embodiments of the present application.

[0059] refer to Figures 1 to 3 The embodiment of the present application provides a pole piece processing device, which includes an unwinding mechanism 10, a winding mechanism 20, a first gluing mechanism 30, a second gluing mechanism 40 and a first roller 50. The unwinding mechanism 10 is used to provide the pole piece 100, and the winding mechanism 20 is used to wind the pole piece 100. The first gluing mechanism 30 and the second gluing mechanism 40 are arranged between the unwinding mechanism 10 and the winding mechanism 20 along the conveying direction of the pole piece 100, and the first gluing mechanism 30 and the second gluing mechanism 40 are used to glue the pole piece 100. The first roller 50 is arranged between the first gluing mechanism 30 and the second gluing mechanism 40 along the conveying direction of the pole piece 100, and the first roller 50 is used to guide the pole piece 100.

[0060] The unwinding mechanism 10 is used to provide the pole piece 100, and the pole piece 100 is wound on the reel of the unwinding mechanism 10, and the pole piece 100 is unwound as the reel rotates. The winding mechanism 20 is used to wind the pole piece 100 to preliminarily form an electrode assembly. The first gluing mechanism 30 and the second gluing mechanism 40 are both used to glue the pole piece 100, and the second gluing mechanism 40 can be arranged downstream of the first gluing mechanism 30.

[0061] The first gluing mechanism 30 and the second gluing mechanism 40 may glue the electrode 100 synchronously, or may glue the electrode 100 sequentially according to a preset time difference.

[0062] The first gluing mechanism 30 and the second gluing mechanism 40 may have the same structure or different structures.

[0063] The first gluing mechanism 30 and the second gluing mechanism 40 may be used for gluing one surface of the electrode sheet 100, or may be used for gluing both surfaces of the electrode sheet 100. As an example, the first gluing mechanism 30 and the second gluing mechanism 40 are both used for gluing both surfaces of the electrode sheet 100; as another example, the first gluing mechanism 30 and the second gluing mechanism 40 are both used for gluing one surface of the electrode sheet 100; as another example, one of the first gluing mechanism 30 and the second gluing mechanism 40 is used for gluing one surface of the electrode sheet 100, and the other is used for gluing both surfaces of the electrode sheet 100.

[0064] The first roller 50 is disposed between the first gluing mechanism 30 and the second gluing mechanism 40 along the conveying direction of the pole piece 100, that is, the first roller 50 is disposed downstream of the first gluing mechanism 30, and the first roller 50 is disposed upstream of the second gluing mechanism 40. The first roller 50 can guide the pole piece 100 to pass through its own roller surface, and provide a certain transition effect for the pole piece 100 located between the first gluing mechanism 30 and the second gluing mechanism 40.

[0065] For example, the pole piece 100 between the first gluing mechanism 30 and the second gluing mechanism 40 will pass through the first roller 50, and the first roller 50 can guide the pole piece 100 to smoothly transition along the conveying direction of the pole piece 100. In other words, the first roller 50 can buffer a portion of the pole piece 100, thereby providing adjustment room for the pole piece 100 when there is a distance difference between the first gluing mechanism 30 and the second gluing mechanism 40.

[0066] For example, when there is a distance difference between the first glue mechanism 30 and the second glue mechanism 40, in other words, when the first glue mechanism 30 and / or the second glue mechanism 40 moves along the thickness direction of the pole piece 100 and drives the pole piece 100 to move, part of the pole piece 100 located on the first roller 50 can be separated from the first roller 50 to compensate for the stretching of the pole piece 100 by the first glue mechanism 30 and the second glue mechanism 40, so as to reduce the risk of the pole piece 100 being subjected to shear force; or, the pole piece 100 located between the first glue mechanism 30 and the second glue mechanism 40 is further wound around the first roller 50 along the surface of the first roller 50 under the action of the pulling force of the first glue mechanism 30 and the second glue mechanism 40, so as to reduce the risk of the pole piece 100 being subjected to shear force.

[0067] In this way, the first roller 50 of the above technical solution can guide the pole piece 100 to pass through its own roller surface, providing a certain transition effect for the pole piece 100 located between the first glue laminating mechanism 30 and the second glue laminating mechanism 40, and can to a certain extent avoid the pole piece 100 located between the first glue laminating mechanism 30 and the second glue laminating mechanism 40 from being subjected to shear force when the first glue laminating mechanism 30 and the second glue laminating mechanism 40 are misaligned, thereby reducing the risk of cracking of the pole piece 100 during the glue laminating process.

[0068] Figure 4 A schematic diagram of the layout of another pole piece processing device provided in some embodiments of the present application.

[0069] Continue to refer Figure 4 In some embodiments, the electrode processing device further includes a second roller 60, which is disposed between the first roller 50 and the second glue-applying mechanism 40 along the conveying direction of the electrode 100. The electrode 100 includes a first surface and a second surface opposite to each other along its thickness direction, the first roller 50 is used to make the first surface pass through its own roller surface, and the second roller 60 is used to make the second surface pass through its own roller surface.

[0070] The second roller 60 is disposed between the first roller 50 and the second gluing mechanism 40 along the conveying direction of the pole piece 100, that is, the second roller 60 is disposed downstream of the first roller 50, and the second roller 60 is disposed upstream of the second gluing mechanism 40. The second roller 60 can guide the pole piece 100 to pass through its own roller surface, and cooperate with the first roller 50 to provide a transition function for the pole piece 100 located between the first gluing mechanism 30 and the second gluing mechanism 40.

[0071] Exemplarily, the first surface of the pole piece 100 located between the first gluing mechanism 30 and the second gluing mechanism 40 passes over the first roller 50, and the second surface of the pole piece 100 located between the first gluing mechanism 30 and the second gluing mechanism 40 passes over the second roller 60, so that the pole piece 100 passes through the first roller 50 and the second roller 60 in sequence in a Z-shaped or quasi-Z-shaped transport. The first roller 50 is close to the first gluing mechanism 30, and the second roller 60 is close to the second gluing mechanism 40. The first roller 50 and the second roller 60 cooperate with each other to jointly guide the pole piece 100 located between the first gluing mechanism 30 and the second gluing mechanism 40 to smoothly transition.

[0072] The first roller 50 and the second roller 60 may have the same structure or different structures. In one example, the roller diameter and length of the first roller 50 are the same as the roller diameter and length of the second roller 60 .

[0073] For example, when there is a distance difference between the first gluing mechanism 30 and the second gluing mechanism 40, in other words, when the first gluing mechanism 30 and / or the second gluing mechanism 40 moves along the thickness direction of the pole piece 100 and drives the pole piece 100 to move, part of the pole piece 100 located on the first roller 50 can be separated from the first roller 50 to compensate for the stretching of the pole piece 100 by the first gluing mechanism 30, so as to reduce the risk of the pole piece 100 being subjected to shear force; or, the pole piece 100 located between the first gluing mechanism 30 and the first roller 50 is further wound around the first roller 50 along the surface of the first roller 50 under the tension of the first gluing mechanism 30, so as to reduce the risk of the pole piece 100 being subjected to shear force.

[0074] Part of the pole piece 100 located on the second roller 60 can compensate for the stretching of the pole piece 100 by the second glue mechanism 40 by detaching from the second roller 60, so as to reduce the risk of the pole piece 100 being subjected to shear force; or, the pole piece 100 located between the second glue mechanism 40 and the second roller 60 is further wound around the second roller 60 along the surface of the second roller 60 under the action of the pulling force of the second glue mechanism 40, so as to reduce the risk of the pole piece 100 being subjected to shear force.

[0075] By introducing the second roller 60, the first roller 50 and the second roller 60 can cooperate with each other to jointly guide the pole piece 100 located between the first gluing mechanism 30 and the second gluing mechanism 40 to smoothly transition, thereby further reducing the risk of cracking of the pole piece 100 during the gluing process.

[0076] In some embodiments, the axis of the first roller 50 and the axis of the second roller 60 are located in the same horizontal plane. In other words, the plane where the axis of the first roller 50 and the axis of the second roller 60 are located is parallel to the horizontal plane 300. The space occupied by the first roller 50 and the second roller 60 in the direction perpendicular to the horizontal plane 300 can be reduced, which is conducive to improving the overall structural compactness of the electrode processing device.

[0077] Figure 5 A schematic diagram of the layout of another pole piece processing device provided in some embodiments of the present application.

[0078] Continue to refer Figure 5 In some embodiments, the electrode processing device further includes a third roller 70, which is disposed between the second roller 60 and the second gluing mechanism 40 along the conveying direction of the electrode 100, and the third roller 70 is used to allow the first surface to pass through its own roller surface.

[0079] The third roller 70 is disposed between the second roller 60 and the second gluing mechanism 40 along the conveying direction of the pole piece 100, that is, the third roller 70 is disposed downstream of the second roller 60, and the third roller 70 is disposed upstream of the second gluing mechanism 40. The second roller 60 can guide the pole piece 100 to pass through its own roller surface, and cooperate with the first roller 50 and the second roller 60 to provide a transition function for the pole piece 100 located between the first gluing mechanism 30 and the second gluing mechanism 40.

[0080] Exemplarily, the first surface of the pole piece 100 located between the first gluing mechanism 30 and the second gluing mechanism 40 contacts the first roller 50 and the third roller 70, and the second surface of the pole piece 100 located between the first gluing mechanism 30 and the second gluing mechanism 40 contacts the second roller 60, so that the pole piece 100 is transported in a V-shape or a quasi-V-shape through the first roller 50, the second roller 60 and the third roller 70 in sequence. In this embodiment, the first roller 50 is close to the first gluing mechanism 30, and the first roller 50 is used to avoid the pole piece 100 from being subjected to shear force to a certain extent when the first gluing mechanism 30 moves along the thickness direction of the pole piece 100 and drives the pole piece 100 to move. The third roller 70 is close to the second gluing mechanism 40, and the third roller 70 is used to avoid the pole piece 100 from being subjected to shear force to a certain extent when the second gluing mechanism 40 moves along the thickness direction of the pole piece 100 and drives the pole piece 100 to move. The second roller 60 is disposed between the first roller 50 and the third roller 70 . The function of the second roller 60 here is to guide the pole piece 100 between the first roller 50 and the third roller 70 to transition smoothly.

[0081] The first roller 50 , the second roller 60 , and the third roller 70 may have the same structure or different structures. In one example, the first roller 50 , the second roller 60 , and the third roller 70 have the same roller diameter and length.

[0082] For example, when there is a distance difference between the first gluing mechanism 30 and the second gluing mechanism 40, in other words, when the first gluing mechanism 30 and / or the second gluing mechanism 40 moves along the thickness direction of the pole piece 100 and drives the pole piece 100 to move, part of the pole piece 100 located on the first roller 50 can be separated from the first roller 50 to compensate for the stretching of the pole piece 100 by the first gluing mechanism 30, so as to reduce the risk of the pole piece 100 being subjected to shear force; or, the pole piece 100 located between the first gluing mechanism 30 and the first roller 50 is further wound around the first roller 50 along the surface of the first roller 50 under the tension of the first gluing mechanism 30, so as to reduce the risk of the pole piece 100 being subjected to shear force.

[0083] Part of the pole piece 100 located on the third roller 70 can compensate for the stretching of the pole piece 100 by the second glue mechanism 40 by detaching from the third roller 70, so as to reduce the risk of the pole piece 100 being subjected to shear force; or, the pole piece 100 located between the second glue mechanism 40 and the third roller 70 is further wound around the third roller 70 along the surface of the third roller 70 under the action of the pulling force of the second glue mechanism 40, so as to reduce the risk of the pole piece 100 being subjected to shear force.

[0084] The second roller 60 is arranged between the first roller 50 and the third roller 70. The second roller 60 can further isolate the pole piece 100 located between the first gluing mechanism 30 and the first roller 50 from the pole piece 100 located between the second gluing mechanism 40 and the third roller 70, so as to reduce the risk of interference between the pole piece 100 located between the first gluing mechanism 30 and the first roller 50 and the pole piece 100 located between the second gluing mechanism 40 and the third roller 70 when they move.

[0085] The above technical solution can further improve the overall stability of the pole piece 100 located between the first gluing mechanism 30 and the second gluing mechanism 40 by introducing the third roller 70, in cooperation with the first roller 50 and the second roller 60, thereby further reducing the risk of cracking of the pole piece 100 due to shear force during the gluing process.

[0086] In some embodiments, the feed end of the first roller 50 and the discharge end of the third roller 70 are located at the same horizontal plane.

[0087] Exemplarily, the feed end of the first roller 50 refers to the position where the pole piece 100 first contacts the surface of the first roller 50 when passing through the first roller 50, and the discharge end of the first roller 50 refers to the position where the pole piece 100 first separates from the surface of the first roller 50 after passing through the first roller 50. In other words, the feed end and the discharge end are respectively the two ends of the portion where the first roller 50 contacts the pole piece 100 along the rotation direction of the first roller 50. Similarly, the feed end of the third roller 70 refers to the position where the pole piece 100 first contacts the surface of the third roller 70 when passing through the third roller 70, and the discharge end of the third roller 70 refers to the position where the pole piece 100 first separates from the surface of the third roller 70 after passing through the third roller 70. In other words, the feed end and the discharge end are respectively the two ends of the portion where the third roller 70 contacts the pole piece 100 along the rotation direction of the third roller 70.

[0088] The feed end of the first roller 50 and the discharge end of the third roller 70 are arranged on the same horizontal plane, so that the electrode 100 can enter the position of the transition mechanism composed of the first roller 50, the second roller 60 and the third roller 70 and output from the transition mechanism composed of the first roller 50, the second roller 60 and the third roller 70 on the same horizontal plane, which can reduce the impact of the introduction of the first roller 50, the second roller 60 and the third roller 70 on the layout of other mechanisms of the electrode processing device. In other words, without changing the original layout of the electrode processing device, the first roller 50, the second roller 60 and the third roller 70 can be added to reduce the risk of cracking of the electrode 100 due to shear force during the glue bonding process.

[0089] In this way, the above technical solution can reduce the overall preparation complexity of the electrode processing device, which is conducive to reducing costs.

[0090] In some embodiments, the first gluing mechanism 30 includes a first gluing component 31 and a second gluing component 32. The first gluing component 31 and the second gluing component 32 are arranged at an interval, and a first channel 33 for the electrode 100 to pass through is formed between the first gluing component 31 and the second gluing component 32. The first gluing component 31 and the second gluing component 32 are respectively used to glue the two sides of the electrode 100.

[0091] For example, the electrode 100 passes through the first channel 33 during normal transportation. When the electrode 100 needs to be glued, the electrode 100 stops being transported, and the first pasting component 31 and the second pasting component 32 move in a direction close to the electrode 100, and glue is applied to the surfaces of both sides of the electrode 100. After the glue is applied, the first pasting component 31 and the second pasting component 32 move in a direction away from the electrode 100 to separate from the electrode 100, and then the electrode 100 continues to be transported.

[0092] The first pasting component 31 and the second pasting component 32 may move toward the pole piece 100 synchronously, or may move toward the pole piece 100 sequentially according to a preset time difference. As an example, the first pasting component 31 and the second pasting component 32 move synchronously in a direction close to the pole piece 100, so as to contact and glue the surface of the pole piece 100 at the same time; as another example, one of the first pasting component 31 and the second pasting component 32 first moves in a direction close to the pole piece 100 and contacts one side surface of the pole piece 100, and the other of the first pasting component 31 and the second pasting component 32 then moves in a direction close to the pole piece 100 and contacts the other side surface of the pole piece 100.

[0093] The first gluing mechanism 30 of the above technical solution can perform gluing on both sides of the pole piece 100 respectively, which effectively improves the applicability of the first gluing mechanism 30 .

[0094] In some embodiments, the first adhesive component 31 has a first surface 311 facing the first channel 33 , and the second adhesive component 32 has a second surface 321 facing the first channel 33 . Both the first surface 311 and the second surface 321 are parallel to the horizontal plane 300 .

[0095] The first veneer 311 is used to apply glue on one side of the pole piece 100, and the second veneer 321 is used to apply glue on the other side of the pole piece 100. Since the first veneer 311 is parallel to the horizontal plane 300, this helps to reduce the risk of tilting or sliding of the protective glue 200 on the first veneer 311 due to the influence of gravity. The design purpose of the second veneer 321 is the same as that of the first veneer 311. The second veneer 321 is parallel to the horizontal plane 300, which helps to reduce the risk of tilting or sliding of the protective glue 200 on the second veneer 321 due to the influence of gravity.

[0096] The above technical solution can effectively improve the gluing quality of the first gluing mechanism 30 by setting the first gluing surface 311 and the second gluing surface 321 to be parallel to the horizontal plane 300, especially in high-speed gluing operations, and can significantly reduce the formation of bubbles between the protective glue 200 and the pole piece 100 and the risk of deflection of the protective glue 200.

[0097] In some embodiments, the projection of at least one end of the first roller 50 in a direction perpendicular to the horizontal plane 300 in the conveying direction of the pole piece 100 is located within the projection of the first channel 33 in the conveying direction of the pole piece 100. In the process of conveying the pole piece 100 from the first channel 33 to the first roller 50, the risk of interference between the pole piece 100 and the first pasting member 31 can be reduced, and the risk of interference between the pole piece 100 and the second pasting member 32 can be reduced.

[0098] In some embodiments, the second gluing mechanism 40 includes a third gluing component and a fourth gluing component, and the third gluing component and the fourth gluing component are arranged at intervals. A second channel for the electrode sheet 100 to pass through is formed between the third gluing component and the fourth gluing component, and the third gluing component and the fourth gluing component are respectively used for gluing both sides of the electrode sheet 100.

[0099] It should be noted that the third pasting component and the fourth pasting component of the second gluing mechanism 40 have the same structural working principle as the first pasting component 31 and the second pasting component 32 of the first gluing mechanism 30. The specific details of the third pasting component and the fourth pasting component can refer to the specific details of the above-mentioned first pasting component 31 and the second pasting component 32, which will not be repeated here.

[0100] In some embodiments, the first wrap angle A of the first roller 50 satisfies the relationship: 10°≤A≤180°.

[0101] As an example, the first wrap angle A of the first roller 50 can be but is not limited to 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, 180°, etc.

[0102] It can be understood that the first wrap angle A refers to the central angle of the contact arc between the pole piece 100 and the first roller 50, and the size of the first wrap angle A reflects the length of the contact arc between the pole piece 100 and the surface of the first roller 50. The smaller the first wrap angle A is, the shorter the length of the contact arc between the pole piece 100 and the surface of the first roller 50 is. When there is a distance difference between the first glue mechanism 30 and the second glue mechanism 40, the less buffering amount that can be provided to reduce the risk of shear force on the pole piece 100 is also less, and at the same time, the total friction force generated by the contact surface between the pole piece 100 and the first roller 50 is also smaller. The larger the first wrap angle A is, the longer the length of the contact arc between the pole piece 100 and the surface of the first roller 50 is. When there is a distance difference between the first glue mechanism 30 and the second glue mechanism 40, the more buffering amount that can be provided to reduce the risk of shear force on the pole piece 100 is also more, and at the same time, the total friction force generated by the contact surface between the pole piece 100 and the first roller 50 is also greater.

[0103] In this way, the above technical solution sets the first wrap angle A of the first roller 50 to satisfy the above relationship, thereby meeting the requirement of reducing the risk of shear force on the pole piece 100 while reducing the risk of damage to the pole piece 100 due to excessive friction.

[0104] In some embodiments, the first wrap angle A of the first roller 50 satisfies the relationship: 30°≤A≤90°, which can further improve the effect of reducing the risk of the pole piece 100 being subjected to shear force and reducing the risk of the pole piece 100 being damaged due to excessive friction. As an example, the first wrap angle A of the first roller 50 can be, but is not limited to, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, etc.

[0105] In some embodiments, the second wrap angle B of the second roller 60 satisfies the relationship: 10°≤B≤180°.

[0106] As an example, the second wrap angle B of the first roller 50 can be but is not limited to 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, 180°, etc.

[0107] It can be understood that the second wrap angle B refers to the central angle of the contact arc between the pole piece 100 and the second roller 60, and the size of the second wrap angle B reflects the length of the contact arc between the pole piece 100 and the surface of the second roller 60. The smaller the second wrap angle B is, the shorter the length of the contact arc between the pole piece 100 and the surface of the second roller 60 is. When there is a distance difference between the first glue mechanism 30 and the second glue mechanism 40, the less buffering amount that can be provided to reduce the risk of shear force on the pole piece 100 is also less, and at the same time, the total friction force generated by the contact surface between the pole piece 100 and the second roller 60 is also smaller. The larger the second wrap angle B is, the longer the length of the contact arc between the pole piece 100 and the surface of the second roller 60 is. When there is a distance difference between the first glue mechanism 30 and the second glue mechanism 40, the more buffering amount that can be provided to reduce the risk of shear force on the pole piece 100 is also more, and at the same time, the total friction force generated by the contact surface between the pole piece 100 and the second roller 60 is also greater.

[0108] In this way, the above technical solution sets the second wrap angle B of the second roller 60 to satisfy the above relationship, thereby meeting the requirement of reducing the risk of shear force on the pole piece 100 while reducing the risk of damage to the pole piece 100 due to excessive friction.

[0109] In some embodiments, the second wrap angle B of the second roller 60 satisfies the relationship: 30°≤B≤90°, which can further improve the effect of reducing the risk of the pole piece 100 being subjected to shear force and reducing the risk of the pole piece 100 being damaged due to excessive friction. As an example, the second wrap angle B of the second roller 60 can be, but is not limited to, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, etc.

[0110] In some embodiments, the pole piece processing device further includes a driving mechanism, which is connected to the first roller 50 and is used to drive the first roller 50 to move.

[0111] Exemplarily, the driving mechanism may be detachably connected to the first roller 50, or may be fixedly connected to the first roller 50. The driving mechanism may be directly connected to the first roller 50, or may be restricted to the first roller 50 by other components. As an example, the connection between the driving mechanism and the first roller 50 may be, but not limited to, bolt connection, riveting, clamping or welding. The driving mechanism may be, but not limited to, a driving motor, a mechanical arm or a screw assembly, etc.

[0112] By providing a driving mechanism to drive the first roller 50 to move, the position of the first roller 50 can be freely and flexibly adjusted to adapt to different application environments, thereby improving the setting flexibility and adaptability of the first roller 50.

[0113] Figure 6 This is a schematic structural diagram of a first roller 50 provided in some embodiments of the present application.

[0114] Continue to refer Figure 6 In some embodiments, an elastic layer 80 is disposed on the surface of the first roller 50 .

[0115] When the pole piece 100 passes through the first roller 50, the pole piece 100 is in direct contact with the elastic layer 80. The elastic layer 80 can quickly produce a certain degree of deformation when subjected to pressure, thereby avoiding rigid contact between the pole piece 100 and the first roller 50 to a certain extent, and further reducing the risk of cracking of the pole piece 100.

[0116] Optionally, the elastic layer 80 may be made of, but is not limited to, rubber, silicone, polyurethane, aramid fiber, propylene-based elastomer, polyvinyl chloride, polyethylene, polyamide, and the like.

[0117] According to some embodiments of the present application, the present application also provides a battery production line, comprising a pole piece processing device according to any of the above schemes.

[0118] In order to better understand the pole piece processing device provided in the embodiment of the present application, based on the same inventive concept, an embodiment of the above-mentioned pole piece processing device in actual application is provided here for illustration.

[0119] The embodiment of the present application provides a needle electrode processing device, which includes an unwinding mechanism 10, a winding mechanism 20, a first gluing mechanism 30, a second gluing mechanism 40, a first roller 50 and a second roller 60. The unwinding mechanism 10 is used to provide the electrode 100, and the winding mechanism 20 is used to wind the electrode 100. The first gluing mechanism 30 and the second gluing mechanism 40 are arranged between the unwinding mechanism 10 and the winding mechanism 20 along the conveying direction of the electrode 100, and the first gluing mechanism 30 and the second gluing mechanism 40 are used to glue the electrode 100. The first roller 50 is arranged between the first gluing mechanism 30 and the second gluing mechanism 40 along the conveying direction of the electrode 100, and the second roller 60 is arranged between the first roller 50 and the second gluing mechanism 40 along the conveying direction of the electrode 100. The electrode 100 includes a first surface and a second surface opposite to each other along its own thickness direction. The first roller 50 is used to make the first surface pass through its own roller surface, and the second roller 60 is used to make the second surface pass through its own roller surface.

[0120] The first roller 50 and the second roller 60 of the above-mentioned technical solution can guide the pole piece 100 to pass through their own roller surfaces, and provide a certain transition effect for the pole piece 100 located between the first glue laminating mechanism 30 and the second glue laminating mechanism 40, and can to a certain extent avoid the pole piece 100 located between the first glue laminating mechanism 30 and the second glue laminating mechanism 40 from being subjected to shear force when the first glue laminating mechanism 30 and the second glue laminating mechanism 40 are misaligned, thereby reducing the risk of cracking of the pole piece 100 during the glue laminating process.

[0121] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A pole piece processing device, characterized in that: include: An unwinding mechanism for providing pole pieces; A winding mechanism, used for winding the pole piece; A first gluing mechanism and a second gluing mechanism are arranged between the unwinding mechanism and the winding mechanism along the conveying direction of the electrode piece, and the first gluing mechanism and the second gluing mechanism are used to glue the electrode piece; A first roller is arranged between the first gluing mechanism and the second gluing mechanism along the conveying direction of the pole piece, and the first roller is used to guide the pole piece.

2. The pole piece processing device according to claim 1, characterized in that: The pole piece processing device further includes a second roller, which is arranged between the first roller and the second glue sticking mechanism along the conveying direction of the pole piece; The pole piece includes a first surface and a second surface opposite to each other along its thickness direction. The first roller is used to allow the first surface to pass through its own roller surface, and the second roller is used to allow the second surface to pass through its own roller surface.

3. The pole piece processing device according to claim 2, characterized in that: The axis of the first roller and the axis of the second roller are located in the same horizontal plane.

4. The pole piece processing device according to claim 2, characterized in that: The pole piece processing device further comprises a third roller, and the third roller is arranged between the second roller and the second gluing mechanism along the conveying direction of the pole piece; The third roller is used to allow the first surface to pass through its own roller surface.

5. The pole piece processing device according to claim 4, characterized in that: The feeding end of the first roller and the discharging end of the third roller are located in the same horizontal plane.

6. The pole piece processing device according to claim 1, characterized in that: The first gluing mechanism includes a first gluing component and a second gluing component, the first gluing component and the second gluing component are arranged at an interval, a first channel for the pole piece to pass through is formed between the first gluing component and the second gluing component, and the first gluing component and the second gluing component are respectively used to glue the two sides of the pole piece.

7. The pole piece processing device according to claim 6, characterized in that: The first adhesive component has a first facing surface facing the first channel, and the second adhesive component has a second facing surface facing the first channel. Both the first facing surface and the second facing surface are parallel to a horizontal plane.

8. The pole piece processing device according to claim 1, characterized in that: The first wrap angle A of the first roller satisfies the relationship: 10°≤A≤180°.

9. The pole piece processing device according to claim 8, characterized in that: The first wrap angle A of the first roller satisfies the relationship: 30°≤A≤90°.

10. The pole piece processing device according to claim 1, characterized in that: The pole piece processing device further comprises a driving mechanism, which is connected to the first roller and is used to drive the first roller to move.

11. The pole piece processing device according to any one of claims 1 to 10, characterized in that: The surface of the first roller is provided with an elastic layer.

12. A battery production line, characterized in that: It comprises a pole piece processing device as described in any one of claims 1-11.

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