Tab smoothing mechanism and battery manufacturing equipment

Abstract

The present application discloses a pole lug smoothing mechanism and a battery manufacturing device, the pole lug smoothing mechanism comprising a support frame, a rotating shaft, a smoothing plate and a limit block. The support frame is used to be arranged on one side of a winding device, and the rotating shaft is rotatably connected to the support frame. The smoothing plate is rotatably connected to the rotating shaft, and the smoothing plate is used to connect with the pole lug and the pole piece body, and at least part of the smoothing plate is located upstream of the feeding direction of the pole piece. The limit block is fixedly connected to the rotating shaft, and the limit block abuts against the side of the smoothing plate facing the pole piece, and drives the smoothing plate to rotate relative to the rotating shaft. The pole lug smoothing mechanism and battery manufacturing equipment of the present application can reduce the risk of bending or deformation of the pole lug, thereby improving the operating stability of the battery cell.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a tab smoothing mechanism and battery manufacturing equipment. Background Art

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

[0003] At present, the market has put forward higher requirements on the manufacturing efficiency and operating stability of battery cells. Therefore, this is also a research direction in the battery field. Utility Model Content

[0004] In view of the above problems, the present application provides a tab smoothing mechanism and a battery manufacturing device, which can reduce the risk of bending or deformation of the tab, thereby improving the operating stability of the battery cell.

[0005] In the first aspect, the present application provides a tab smoothing mechanism, comprising a support frame, a rotating shaft, a smoothing plate and a limit block. The support frame is used to be arranged on one side of a winding device, and the rotating shaft is rotatably connected to the support frame. The smoothing plate is rotatably connected to the rotating shaft, and the smoothing plate is used to connect with the tab and the pole piece body, and at least part of the smoothing plate is located upstream of the feeding direction of the pole piece. The limit block is fixedly connected to the rotating shaft, and the limit block abuts against the side of the smoothing plate facing the pole piece, and drives the smoothing plate to rotate relative to the rotating shaft.

[0006] In the technical solution of the embodiment of the present application, a support frame is provided to support the rotating shaft, the smoothing plate and the limit block, so as to improve the position stability between the smoothing plate and the pole ear during the smoothing process of the pole ear, and reduce the risk of the pole ear folding or forming a crescent mark. The rotating shaft is provided to drive the limit block to rotate, and the limit block abuts against the smoothing plate to drive the smoothing plate to rotate, thereby adjusting the angle between the smoothing plate and the pole ear, so as to smooth the pole ear and the pole piece body at the best angle, and reduce the risk of folding and breaking during the winding process of the pole ear. The angle of the smoothing plate can also be adjusted to facilitate the replacement of the winding needle, reduce the risk of interference with the electrode assembly and the winding needle, and improve production efficiency.

[0007] In some embodiments, the movable end of the caressing plate away from the rotating shaft points to the feeding position of the pole piece along the first direction, and the first direction is set at an acute angle to the feeding direction of the pole piece. In the above structure, by pointing the end of the caressing plate to the feeding position, it is possible to follow the winding direction of the pole piece, reduce the resistance of the pole piece winding process, and improve the efficiency of pole piece winding. Setting the caressing plate at an acute angle to the pole piece can form a suitable pressure on the pole ear, reduce the deformation caused by the pressure on the pole ear, and at the same time limit the feeding direction of the pole ear, reduce the pole ear flanging or the formation of a crescent mark.

[0008] In some embodiments, the support is arranged upstream of the pole piece winding direction. The support is arranged upstream to facilitate the position setting of the smoothing plate, thereby improving the accuracy and efficiency of the position adjustment of the smoothing plate.

[0009] In some embodiments, the tab smoothing mechanism further includes a driving motor, which is connected to the rotating shaft and drives the limit block to drive the smoothing plate to rotate. In the above structure, the driving motor is provided to automatically adjust the position of the limit block, thereby adjusting the angle between the smoothing plate and the pole piece, and the angle of the smoothing plate can be adjusted as the radius of the electrically wound pole piece group increases, thereby improving the adaptability of the smoothing plate.

[0010] In some embodiments, the smoothing plate includes a connecting portion and a smoothing portion. The connecting portion is sleeved on the rotating shaft and is loosely matched with the rotating shaft. The smoothing portion is connected to the side of the connecting portion that is away from the rotating shaft. The smoothing portion includes a first section arranged toward the pole ear and a second section arranged toward the pole piece body. In the above structure, the connecting portion rotatably connects the smoothing portion to the rotating shaft, the first end of the smoothing plate overlaps the pole piece body, and the second section of the smoothing plate overlaps the pole ear, which can smooth the pole ear and the pole piece body at the same time, thereby improving the flatness between the pole ear and the pole piece body and reducing the risk of the pole ear being folded or deformed relative to the pole piece body.

[0011] In some embodiments, the positive projection of the tab on the smoothing portion completely falls within the range of the first section. The above structure can increase the contact area between the tab and the smoothing plate, smooth the entire tab at the same time, and improve the efficiency of tab smoothing.

[0012] In some embodiments, the connecting portion is provided with a through groove extending radially through the rotating shaft, and the limiting block includes a connecting sleeve and a limiting protrusion. The connecting sleeve is arranged in the through groove, and the connecting sleeve is fixedly connected to the rotating shaft. The limiting protrusion protrudes along the side of the connecting sleeve away from the rotating shaft and abuts against the side surface of the caressing plate facing the pole piece. In the above structure, the through groove is provided to facilitate the setting of the limiting block, so that the limiting block can be easily extended to the caressing plate and limit the displacement of the caressing plate. The connecting sleeve of the limiting block can form a stable connection with the rotating shaft, and the limiting protrusion can drive the caressing plate to move, so as to achieve the angle adjustment of the angle between the caressing plate and the pole piece.

[0013] In some embodiments, the through groove divides the connection part into two sleeves spaced apart in the axial direction of the rotating shaft, and the smoothing part is connected to the two sleeves respectively. The limit block is arranged in the middle of the smoothing part, and the thrust of the limit block on the smoothing plate can be more balanced, reducing the risk of the smoothing plate tilting and improving the flatness of the tab during the smoothing process.

[0014] In some embodiments, the tab smoothing mechanism further comprises a control device, which is electrically connected to the drive motor. The above structure realizes automatic rotation of the limit block by setting the control device, thereby improving the efficiency and accuracy of control.

[0015] In some embodiments, the tab smoothing mechanism further includes a sensing device, which is used to sense the distance between the rotating shaft and the tab, and the sensing device is electrically connected to the control device. By providing the sensing device, the thickness of the tab winding is sensed, and the angle of the smoothing plate is adjusted according to the thickness change, thereby improving the accuracy and efficiency of the control.

[0016] In some embodiments, the smoothing plate is arranged on one side of the pole piece in the third direction, and the support frame is provided with a plurality of mounting holes, which are arranged at intervals along the third direction. The above technical solution can facilitate the position adjustment of the rotating shaft and the smoothing plate, and improve the accuracy of the smoothing angle of the smoothing plate.

[0017] In a second aspect, the present application provides a battery manufacturing device, which includes the tab smoothing mechanism in the above-mentioned embodiment.

[0018] 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

[0019] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0020] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0021] Figure 2 A schematic diagram of the exploded structure of a battery device provided in some embodiments of the present application;

[0022] Figure 3 A schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application;

[0023] Figure 4 A schematic diagram of the structure of an electrode plate provided in some embodiments of the present application;

[0024] Figure 5 A schematic diagram of the structure of an electrode sheet entering a winding device provided in some embodiments of the present application;

[0025] Figure 6 A schematic diagram of the structure of a tab smoothing mechanism provided in some embodiments of the present application;

[0026] Figure 7A schematic diagram of the structure of a tab smoothing mechanism provided in some other embodiments of the present application;

[0027] Figure 8 for Figure 7 A schematic diagram of the enlarged structure of part A;

[0028] Fig. 9 A schematic diagram of the structure of a tab smoothing mechanism provided in some other embodiments of the present application;

[0029] Fig.10 A schematic diagram of the structure of a tab smoothing mechanism provided in some other embodiments of the present application;

[0030] Fig.11 This is a schematic structural diagram of a tab smoothing mechanism provided in some further embodiments of the present application.

[0031] DETAILED DESCRIPTION OF REFERENCE NUMERALS

[0032] 1. Vehicle; 2. Battery device; 3. Controller; 4. Motor; 5. Box; 51. First box part; 52. Second box part; 6. Battery cell; 10. Electrode assembly; 11. Electrode pole piece; 12. Pole piece body; 13. Ear; 20. Shell; 30. End cover; 40. Shell; X. First direction; Y. Second direction; Z. Third direction; R. Winding direction; 8. Winding device; 7. Ear smoothing mechanism; 701. Support frame; 702. Rotating shaft; 703. Smoothing plate; 704. Limiting block; 705. Driving motor; 706. Connecting part; 707. Smoothing part; 708. First section; 709. Second section; 710. Connecting sleeve; 711. Limiting convex part; 712. Mounting hole. DETAILED DESCRIPTION

[0033] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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).

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar component.

[0044] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, a battery cell assembly may be a battery module, and a battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, a battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0045] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0046] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0047] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0048] In the embodiment of the present application, the battery cell may be a secondary battery cell, which refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0049] Battery cells may include but are not limited to lithium ion battery cells, sodium ion battery cells, sodium lithium ion battery cells, lithium metal battery cells, sodium metal battery cells, lithium sulfur battery cells, magnesium ion battery cells, nickel metal hydride battery cells, nickel cadmium battery cells, lead storage battery cells, etc.

[0050] As an example, the battery cell may be a cylindrical battery cell, a prismatic 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, such as a hexagonal battery, etc. There is no particular limitation in the present application.

[0051] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0052] In some embodiments, the battery device may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0053] The battery device disclosed in the embodiments of the present application can be used in various energy storage systems that use the battery device as a power source or use the battery device as an energy storage element. The electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0054] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0055] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0056] like Figure 1 As shown, a battery device 2 is disposed inside the vehicle 1, and the battery device 2 may be disposed at the bottom, head, or tail of the vehicle 1. The battery device 2 may be used to power the vehicle 1, for example, the battery device 2 may be used as an operating power source for the vehicle 1.

[0057] The vehicle 1 may further include a controller 3 and a motor 4 , wherein the controller 3 is used to control the battery device 2 to supply power to the motor 4 , for example, to meet the power requirements of starting, navigating and driving the vehicle 1 .

[0058] In some embodiments of the present application, the battery device 2 can not only serve as an operating power source for the vehicle 1, but also serve as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0059] Figure 2 Schematic diagram of the exploded structure of a battery device provided in some embodiments of the present application.

[0060] The box 5 is used to accommodate the battery cell 6, and the box 5 can be of various structures. In some embodiments, the box 5 can include a first box portion 51 and a second box portion 52, the first box portion 51 and the second box portion 52 cover each other, and the first box portion 51 and the second box portion 52 jointly define a storage space 53 for accommodating the battery cell. The first box portion 51 can be a hollow structure with one end open, and the second box portion 52 is a plate-like structure, and the second box portion 52 covers the open side of the first box portion 51 to form a box 5 with a storage space 53; the first box portion 51 and the second box portion 52 can also be hollow structures with one side open, and the open side of the first box portion 51 covers the open side of the second box portion 52 to form a box 5 with a storage space 53. Of course, the first box portion 51 and the second box portion 52 can be of various shapes, such as a cylinder, a cuboid, etc.

[0061] In order to improve the sealing performance after the first box body 51 and the second box body 52 are connected, a sealing member, such as a sealant, a sealing ring, etc., may also be provided between the first box body 51 and the second box body 52 .

[0062] Assuming that the first box body portion 51 covers the top of the second box body portion 52 , the first box body portion 51 can also be referred to as an upper box cover, and the second box body portion 52 can also be referred to as a lower box body.

[0063] In the battery device 2, the battery cell 6 can be one or more. If there are more than one battery cell 6, the battery cells 6 can be connected in series, in parallel or in mixed connection. Mixed connection means that the battery cells 6 are both connected in series and in parallel. The battery cells 6 can be directly connected in series, in parallel or in mixed connection, and then the whole formed by the battery cells 6 is accommodated in the box 5; of course, the battery cells can also be connected in series, in parallel or in mixed connection to form a battery module, and then the battery modules are connected in series, in parallel or in mixed connection to form a whole, and then accommodated in the box 5.

[0064] In some optional embodiments, the battery cells 6 may also be directly accommodated in the box body 5 to reduce the connecting components or supporting components required to form the battery module and improve the energy density of the battery device 2 .

[0065] For example, the battery cell 6 may be the smallest unit constituting the battery device 2 .

[0066] Figure 3 A schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application.

[0067] like Figure 3 As shown, in some embodiments, the battery cell 6 includes a housing 40 and an electrode assembly 10 accommodated in the housing 40 .

[0068] The electrode assembly 10 includes a positive electrode and a negative electrode. During the charge and discharge process of the battery cell 6, active ions (such as lithium ions) are inserted and removed back and forth between the positive electrode and the negative electrode. Optionally, the electrode assembly 10 also includes a separator disposed between the positive electrode and the negative electrode, which can reduce the risk of short circuit between the positive and negative electrodes while allowing active ions to pass through.

[0069] The housing 40 is used to encapsulate the electrode assembly 10 and the electrolyte and other components. The housing 40 may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing 40 ), or an aluminum-plastic film.

[0070] In some embodiments, the housing 40 includes a shell 20 and an end cover 30 . The shell 20 has an opening, and the end cover 30 is used to cover the opening.

[0071] In some embodiments, the battery cell 6 further includes an electrolyte contained in the housing 40. The electrolyte plays a role in conducting ions between the positive and negative electrodes and can be in liquid, gel or solid state.

[0072] In some embodiments, the battery cell 6 includes an electrode terminal 25 . The electrode terminal 25 is electrically connected to the electrode assembly 10 to output or input electrical energy of the battery cell 6 .

[0073] In some embodiments, the battery cell 6 includes a pressure relief mechanism 24, which is used to rupture when the internal pressure of the battery cell 6 exceeds a threshold value to release the pressure inside the battery cell 6. Specifically, the pressure relief mechanism 24 can be an element or component that is actuated when the battery cell 6 reaches a certain condition. Optionally, the housing 40 includes an end cap 30 and a shell 20. The shell 20 has an opening, and the end cap 30 covers the opening and is sealed and connected to the shell 20.

[0074] The battery cell 6 includes a housing 40, a pressure relief mechanism, and an electrode assembly 10. The housing 40 is provided with a receiving space for receiving the electrode assembly 10, and the housing 40 includes an end cover 30. The pressure relief mechanism is provided at the end cover 30. The housing 40 includes the end cover 30 and a shell 20, the electrode assembly 10 is provided in the shell 20, the shell 20 has an opening, and the end cover 30 covers the opening.

[0075] The electrode assembly 10 includes a plurality of stacked positive electrode sheets, negative electrode sheets and separators. Exemplarily, the stacked positive electrode sheets, negative electrode sheets and separators are wound to form a cylindrical body, and the cylindrical body is rolled to form an electrode assembly with a flat middle and bent sides.

[0076] The structures of the positive electrode sheet and the negative electrode sheet are the same. The following description will take the positive electrode sheet as an example, which will be referred to as the electrode sheet below.

[0077] like Figure 4 as well as Figure 5 As shown, the electrode plate generally includes a plate body portion coated with an active material, and a pole ear extending along one side of the plate body, and no active material is disposed on the pole ear. Exemplarily, the pole ear is disposed on one side of the plate body along the second direction, and the electrode plate is wound with the second direction as the axial direction. The second direction is disposed to intersect with the first direction.

[0078] During the winding process, the width of the electrode pole piece changes, and the pole ear is prone to folding, deformation, and even the risk of tape breakage, which seriously affects the winding efficiency and yield rate of the electrode assembly.

[0079] In view of this, an embodiment of the present application provides a lug smoothing mechanism, in which a support frame is provided to support a rotating shaft, a smoothing plate and a limiting block, so as to improve the positional stability between the smoothing plate and the lug during the lug smoothing process, and reduce the risk of the lug folding or forming a crescent mark. The rotating shaft is provided to drive the limiting block to rotate, and the limiting block abuts against the smoothing plate to drive the smoothing plate to rotate, thereby adjusting the angle between the smoothing plate and the lug, smoothing the lug and the pole piece body at the best angle, and reducing the risk of folding and breaking during the winding process of the lug. The angle of the smoothing plate can also be adjusted to facilitate the replacement of the winding needle, reduce the risk of interference with the electrode assembly and the winding needle, and improve production efficiency.

[0080] Please refer to Figures 6 to 8 , Figure 6 This is a schematic diagram of the structure of the tab smoothing mechanism provided in some embodiments of the present application. Figure 7 This is a schematic diagram of the structure of the tab smoothing mechanism provided in some other embodiments of the present application. Figure 8 for Figure 7 Schematic diagram of the enlarged structure of part A.

[0081] As shown in the figure, an embodiment of the present application provides a tab smoothing mechanism 7, including a support frame 701, a rotating shaft 702, a smoothing plate 703 and a limit block 704. The support frame 701 is used to be arranged on one side of the winding device 8, and the rotating shaft 702 is rotatably connected to the support frame 701. The smoothing plate 703 is rotatably connected to the rotating shaft 702, and the smoothing plate 703 is used to connect with the tab 13 and the pole piece body 12, and at least part of the smoothing plate 703 is located upstream of the feeding direction of the pole piece. The limit block 704 is fixedly connected to the rotating shaft 702, and the limit block 704 abuts against the side of the smoothing plate 703 facing the pole piece, and drives the smoothing plate 703 to rotate relative to the rotating shaft 702.

[0082] The support frame 701 is the foundation of the entire smoothing device, and is arranged on one side of the winding device 8 to provide support for the rotating shaft 702, the smoothing plate 703 and other components. The support frame 701 generally includes a base and a support rod, the support rod is arranged on the base, and the rotating shaft 702 can be connected to the support rod.

[0083] The smoothing plate 703 is usually made of a soft and wear-resistant material so as not to damage the pole ear 13 and the pole piece body 12 during the smoothing process. The smoothing plate 703 is in direct contact with the pole ear 13 and the pole piece body 12. At least part of the smoothing plate 703 is located upstream of the pole piece feeding direction. Before the pole piece enters the winding device 8, the smoothing plate 703 has already started to smooth the pole ear 13 thereon. As the pole ear 13 and the pole piece body 12 enter the winding device 8, they move relative to the smoothing plate 703. The smoothing plate 703 applies a certain pressure to the pole ear 13 during the movement, which limits the deformation of the pole ear 13 and reduces the risk of folding and breaking of the pole ear 13 during the feeding process.

[0084] The limit block 704 is fixedly connected to the rotating shaft 702, and it abuts against the side of the smoothing plate 703 facing the pole piece, and ensures the stability and accuracy of the smoothing operation by limiting the rotation range of the smoothing plate 703. The existence of the limit block 704 prevents the smoothing plate 703 from continuing to rotate after rotating to a certain angle, thereby avoiding over-smoothing or under-smoothing. In the technical solution of the embodiment of the present application, a support frame 701 is provided to support the rotating shaft 702, the smoothing plate 703 and the limit block 704, so as to improve the position stability between the smoothing plate 703 and the pole ear 13 during the smoothing process of the pole ear 13, and reduce the risk of the pole ear 13 being folded or forming a crescent mark. The rotating shaft 702 is provided to drive the limit block 704 to rotate, and the limit block 704 abuts against the smoothing plate 703 to drive the smoothing plate 703 to rotate, thereby adjusting the angle between the smoothing plate 703 and the pole ear 13, so as to smooth the pole ear 13 and the pole piece body 12 at the best angle, reducing the risk of folding and breaking during the winding process of the pole ear 13. By adjusting the angle of the smoothing plate 703, it is also convenient to replace the winding needle, reduce the risk of interference with the electrode assembly 10 and the winding needle, and improve production efficiency.

[0085] like Figure 6 as well as Fig. 9 , Fig.10 As shown, in some embodiments of the present application, the movable end of the caressing plate 703 away from the rotating shaft 702 points to the feeding position of the pole piece along the first direction X, and the first direction X and the feeding direction of the pole piece are arranged at an acute angle. Exemplarily, the angles between the first direction X and the feeding direction of the pole piece in the figure are 10°≤α≤12° and 8°≤β≤10° respectively.

[0086] The movable end of the stroking plate 703 points to the feeding position of the pole piece, and the stroking plate 703 can follow the winding direction R of the pole piece during the winding process. This reduces the friction and resistance between the stroking plate 703 and the pole piece, so that the pole piece can enter the winding device 8 more smoothly. Due to the reduction of resistance and friction, the winding process of the pole piece becomes smoother, thereby improving the efficiency of the entire winding process.

[0087] The smoothing plate 703 is arranged at an acute angle with the pole piece, and the smoothing plate 703 can form a suitable pressure when contacting the pole ear 13. This pressure can smooth the pole ear 13 without causing excessive pressure to compress the pole ear 13, thereby avoiding deformation of the pole ear 13.

[0088] The acute angle setting also enables the smoothing plate 703 to form a certain restriction on the feeding direction of the pole tab 13. During the pole sheet winding process, the smoothing plate 703 can guide the pole tab 13 to enter the winding device 8 in the correct direction, thereby reducing the risk of the pole tab 13 flanging or forming a crescent mark.

[0089] In the above structure, appropriate pressure can be applied to the tab 13, thereby reducing deformation of the tab 13 caused by pressure, and restricting the feeding direction of the tab 13, thereby reducing the crescent mark formed by flanging or deformation of the tab 13.

[0090] In some embodiments of the present application, the support frame 701 is disposed upstream of the pole piece winding direction R.

[0091] The support frame 701 is arranged upstream in the winding direction R of the pole piece, and the caressing plate 703 is correspondingly located in the area before the pole piece enters the winding device 8. Such a layout provides sufficient space for the caressing plate 703 to adjust its position, ensuring that it can accurately contact the pole lug 13 and the pole piece body 12. Placing the support frame 701 upstream also makes the position adjustment of the caressing plate 703 more efficient. After determining the most suitable position of the support frame 701, the caressing plate 703 can be kept in a stable working state throughout the winding process by simply adjusting the angle between the caressing plate 703 and the pole piece, thereby reducing the downtime adjustment time caused by improper position and improving production efficiency.

[0092] In some embodiments of the present application, the tab smoothing mechanism 7 further includes a driving motor 705 , and the driving motor 705 and the rotating shaft 702 drive the limiting block 704 to drive the smoothing plate 703 to rotate.

[0093] By connecting the driving motor 705 with the limit block 704, the position of the limit block 704 can be automatically adjusted, so that the angle between the smoothing plate 703 and the pole piece can be dynamically adjusted as needed to adapt to the change of the pole piece group radius in different winding stages.

[0094] As the radius of the pole piece group increases, the position and shape of the pole lug 13 will also change. Figures 9 and 10 As shown, in the initial stage of winding, the electrode sheet radius on the winding device 8 is small, and the angle between the caressing plate 703 and the electrode sheet 11 is α. For example, α=11.7°; as the electrode sheet 11 enters the winding device 8 through winding, the angle between the caressing plate 703 and the electrode sheet 11 decreases, and the angle between the caressing plate 703 and the electrode sheet 11 is β, and for example, β=8.7°.

[0095] By driving the motor 705 to adjust the angle between the smoothing plate 703 and the pole piece at any time, it can be ensured that the smoothing plate 703 can always maintain the best contact with the pole ear 13, thereby improving the smoothing effect. The appropriate angle setting can also prevent the smoothing plate 703 from causing excessive pressure or friction on the pole ear 13, thereby preventing damage to the pole ear 13. The automatic adjustment mechanism reduces the need for manual intervention, making the entire winding and smoothing process smoother and more efficient. This helps to improve the production efficiency and quality of battery manufacturing.

[0096] like Fig.11 As shown, in some embodiments of the present application, the smoothing plate 703 includes a connecting portion 706 and a smoothing portion 707. The connecting portion 706 is sleeved on the rotating shaft 702 and is loosely matched with the rotating shaft 702. The smoothing portion 707 is connected to a side of the connecting portion 706 away from the rotating shaft 702. The smoothing portion 707 includes a first section 708 disposed toward the pole ear 13 and a second section 709 disposed toward the pole piece body 12.

[0097] The connecting portion 706 is the connecting portion 706 of the caressing plate 703 and the rotating shaft 702, and is sleeved on the rotating shaft 702 through a clearance fit, so that the caressing plate 703 can rotate relative to the rotating shaft 702. The caressing plate 703 maintains a certain flexibility during the rotation process, thereby better adapting to the pole ears 13 and pole piece bodies 12 of different shapes and sizes.

[0098] The smoothing portion 707 is connected to the side of the connecting portion 706 away from the rotating shaft 702 , and includes a first section 708 disposed toward the pole ear 13 and a second section 709 disposed toward the pole piece body 12 . The smoothing plate 703 can contact and smooth the pole ear 13 and the pole piece body 12 at the same time.

[0099] The first section 708 of the smoothing plate 703 overlaps the pole ear 13, and the second section 709 overlaps the pole piece body 12. By rotating or moving the smoothing plate 703, the pole ear 13 and the pole piece body 12 can be smoothed at the same time to improve the flatness between the pole ear 13 and the pole piece body 12, thereby reducing the degradation of battery performance or safety hazards caused by unevenness. Through the two-section design of the smoothing portion 707, the smoothing plate 703 can more effectively control the shape of the pole ear 13 and reduce the risk of the pole ear 13 being folded or deformed relative to the pole piece body 12.

[0100] like Fig.11 As shown, in some embodiments of the present application, the orthographic projection of the pole ear 13 on the smoothed portion 707 completely falls within the range of the first section 708 .

[0101] When the orthographic projection of the pole ear 13 on the smoothing portion 707 completely falls within the range of the first section 708, the pole ear 13 is in full contact with the first section 708 of the smoothing plate 703, so that the contact area between the pole ear 13 and the smoothing plate 703 is maximized. The larger contact area enables the smoothing plate 703 to more effectively disperse the pressure on the pole ear 13, thereby reducing the risk of deformation or damage to the pole ear 13 caused by excessive local pressure. At the same time, the larger contact area also makes the smoothing operation more uniform and stable. At the same time, smoothing the entire pole ear 13 can also improve the uniformity and consistency of the smoothing effect, avoiding seams or uneven areas caused by segmented smoothing.

[0102] like Figures 6 to 8 As shown, in some embodiments of the present application, the connecting portion 706 is provided with a through slot that penetrates radially along the rotating shaft 702, and the limiting block 704 includes a connecting sleeve 710 and a limiting protrusion 711. The connecting sleeve 710 is arranged in the through slot, and the connecting sleeve 710 is fixedly connected to the rotating shaft 702. The limiting protrusion 711 protrudes along a side of the connecting sleeve 710 away from the rotating shaft 702 and abuts against a side surface of the smoothing plate 703 facing the pole piece.

[0103] The through groove on the connecting portion 706 that runs radially through the rotating shaft 702 provides space for the installation of the limit block 704. The existence of the through groove allows the limit block 704 to move or adjust to a certain extent in the direction perpendicular to the rotating shaft 702, thereby indirectly affecting the position and angle of the smoothing plate 703. The connecting sleeve 710 is arranged in the through groove and fixedly connected to the rotating shaft 702, ensuring a stable connection between the limit block 704 and the rotating shaft 702. The limiting protrusion 711 protrudes along the side of the connecting sleeve 710 away from the rotating shaft 702, and abuts against the side surface of the smoothing plate 703 facing the pole piece. The limiting protrusion 711 limits the displacement of the smoothing plate 703 through physical contact, and can transmit force to adjust the angle of the smoothing plate 703.

[0104] When the angle between the caressing plate 703 and the pole piece needs to be adjusted, the relative position between the limiting protrusion 711 and the caressing plate 703 can be changed by operating the limiting block 704 (e.g., rotating counterclockwise). Since the limiting protrusion 711 abuts against the caressing plate 703, its movement will directly drive the caressing plate 703 to adjust the corresponding angle. This adjustment mechanism is both flexible and stable, and can ensure that the caressing plate 703 can be accurately adjusted to the required angle when needed.

[0105] In the above structure, the through slot is provided to facilitate the setting of the limit block 704, so that the limit block 704 can be easily extended to the caressing plate 703 and limit the displacement of the caressing plate 703. The connecting sleeve 710 of the limit block 704 can form a stable connection with the rotating shaft 702, and the limiting protrusion 711 can drive the caressing plate 703 to move, so as to achieve the angle adjustment between the caressing plate 703 and the pole piece.

[0106] Optionally, when the limit block 704 rotates in a direction away from the caressing plate 703 (counterclockwise in the figure), the limit block 704 is disengaged from the caressing plate 703, and the caressing plate 703 loses the support of the limit block 704. Due to the action of gravity, its free end falls, thereby automatically moving toward the direction of the limit block 704 until it abuts against the limit block 704.

[0107] In some embodiments of the present application, the through groove divides the connecting portion 706 into two sleeves spaced apart from each other in the axial direction of the rotating shaft 702 , and the smoothing portion 707 is connected to the two sleeves respectively.

[0108] The through groove divides the connection part 706 into two sleeves spaced axially along the rotating shaft 702, which not only provides space for the installation of the stop block 704, but also enhances the structural strength of the connection part 706. The smoothing part 707 is connected to the two sleeves respectively, ensuring that the smoothing plate 703 can transmit force more stably when subjected to thrust, avoiding the problem of uneven force caused by single-point connection.

[0109] The limit block 704 is arranged in the middle of the smoothing portion 707 to ensure that the limit block 704 has a more balanced thrust on the smoothing plate 703. Since the limit block 704 is in contact with two sleeves (or the connecting portion 706) and the smoothing plate 703 at the same time, it can more effectively control the movement and angle of the smoothing plate 703. This design reduces the risk of the smoothing plate 703 tilting when it is subjected to thrust, because even if one side is subjected to a greater force, the other side can maintain balance through the support of the limit block 704 and the sleeve. Due to the joint action of the limit block 704 and the sleeve, the smoothing plate 703 can maintain a more stable posture during the smoothing process, thereby ensuring uniform smoothing of the pole ear 13, reducing the deformation or unevenness of the pole ear 13 caused by the tilt of the smoothing plate 703 or uneven force, and improving the quality and consistency of battery manufacturing.

[0110] In some embodiments of the present application, the tab smoothing mechanism 7 further includes a control device, which is electrically connected to the drive motor 705 .

[0111] The control device can accurately control the rotation angle and speed of the limit block 704 by sending instructions to the drive motor 705. This automated control not only improves the convenience of operation, but also ensures the accuracy and consistency of the rotation of the limit block 704. Compared with manually adjusting the position of the limit block 704, the control device can respond to instructions and adjust the state of the limit block 704 more quickly. This greatly improves the efficiency of the tab 13 smoothing operation and shortens the waiting time in the battery manufacturing process.

[0112] In some embodiments of the present application, the tab smoothing mechanism 7 further includes a sensing device, which is used to sense the distance between the rotating shaft 702 and the tab 13 , and the sensing device is electrically connected to the control device.

[0113] The sensing device can sense the distance between the rotating shaft 702 and the tab 13 in real time and accurately, that is, the thickness of the tab 13. This real-time sensing capability enables the control device to respond quickly and adjust the angle of the smoothing plate 703 to adapt to the change in the thickness of the tab 13.

[0114] Optionally, the sensing device can be a laser distance sensor, an ultrasonic distance sensor, a displacement sensor, a capacitive sensor, etc. Exemplarily, a capacitive sensor detects the position or thickness of an object by measuring the capacitance change between two electrodes. In the tab smoothing mechanism 7, the capacitive sensor can be installed near the rotating shaft 702 to measure the capacitance change between the tab 13 and the sensor, thereby indirectly obtaining the winding thickness of the tab 13. This sensor has the advantages of non-contact measurement and fast response speed.

[0115] Through the data provided by the sensing device, the control device can accurately calculate and adjust the angle of the smoothing plate 703 to ensure that the pole lug 13 remains flat during the smoothing process. This precise control helps to reduce the deformation and unevenness of the pole lug 13 and improve the quality of battery manufacturing. The coordinated work of the sensing device and the control device enables rapid adjustment of the angle of the smoothing plate 703. Compared with the traditional manual adjustment method, this automated adjustment not only improves the operating efficiency, but also reduces the errors and uncertainties caused by human operation. Since the sensing device can sense the changes in the thickness of the pole lug 13 in real time, the pole lug smoothing mechanism 7 can more flexibly adapt to pole lugs 13 of different sizes and shapes, and can expand the application range of the pole lug smoothing mechanism 7.

[0116] like Fig.11As shown, in some embodiments of the present application, the caressing plate 703 is arranged on one side of the pole piece in the third direction Z, and the support frame 701 is provided with a plurality of mounting holes 712, and the plurality of mounting holes 712 are arranged at intervals along the third direction Z.

[0117] Optionally, the third direction Z intersects with the plane where the first direction X and the second direction Y are located. Exemplarily, the third direction Z is a vertical direction perpendicular to the horizontal plane.

[0118] The multiple mounting holes 712 provided on the support frame 701 allow the rotating shaft 702 (and the smoothing plate 703 connected thereto) to be installed at different positions. This design allows the user to flexibly select the installation position of the rotating shaft 702 and the smoothing plate 703 according to the specific size, shape and smoothing requirements of the tab 13.

[0119] By adjusting the installation positions of the rotating shaft 702 and the smoothing plate 703 on the support frame 701, the angle between the smoothing plate 703 and the pole piece can be more accurately controlled. The pole tab 13 is subjected to uniform and appropriate pressure during the smoothing process, thereby improving the smoothing quality and consistency of the pole tab 13.

[0120] The embodiment of the present application also provides a battery manufacturing device, which includes the tab smoothing mechanism 7 in the above embodiment. The tab smoothing mechanism 7 is provided with a support frame 701 to support the rotating shaft 702, the smoothing plate 703 and the limit block 704, so as to improve the position stability between the smoothing plate 703 and the tab 13 during the smoothing process of the tab 13, and reduce the risk of the tab 13 being folded or forming a crescent mark. The rotating shaft 702 is provided to drive the limit block 704 to rotate, and the limit block 704 abuts against the smoothing plate 703 to drive the smoothing plate 703 to rotate, thereby adjusting the angle between the smoothing plate 703 and the tab 13, smoothing the tab 13 and the pole piece body 12 at the best angle, and reducing the risk of folding and breaking of the tab 13 during the winding process. The angle of the smoothing plate 703 can also be adjusted to facilitate the replacement of the winding needle, reduce the risk of interference with the electrode assembly 10 and the winding needle, and improve production efficiency.

[0121] 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 tab smoothing mechanism, characterized in that: include: A support frame, used to be arranged on one side of the winding device; A rotating shaft, rotatably connected to the support frame; A caressing plate, rotatably connected to the rotating shaft, the caressing plate is used to connect with the pole ear and the pole piece body, and at least a part of the caressing plate is located upstream of the pole piece feeding direction; A limit block is fixedly connected to the rotating shaft, the limit block abuts against a side of the caressing plate facing the pole piece, and drives the caressing plate to rotate relative to the rotating shaft.

2. The tab smoothing mechanism according to claim 1, characterized in that: The movable end of the smoothing plate away from the rotating shaft points to the feeding position of the pole piece along a first direction, and the first direction forms an acute angle with the feeding direction of the pole piece.

3. The tab smoothing mechanism according to claim 1 or 2, characterized in that: The support frame is arranged upstream in the winding direction of the pole piece.

4. The tab smoothing mechanism according to claim 3, characterized in that: The tab smoothing mechanism further includes a driving motor, which is connected to the rotating shaft and drives the limiting block to drive the smoothing plate to rotate.

5. The tab smoothing mechanism according to claim 4, characterized in that: The caressing plate comprises: A connecting portion, sleeved on the rotating shaft and loosely matched with the rotating shaft; The smoothing portion is connected to a side of the connecting portion away from the rotating shaft, and the smoothing portion includes a first section arranged toward the pole ear and a second section arranged toward the pole piece body.

6. The tab smoothing mechanism according to claim 5, characterized in that: The orthographic projection of the pole ear on the smoothed portion completely falls within the range of the first section.

7. The tab smoothing mechanism according to claim 6, characterized in that: The connecting portion is provided with a through slot which penetrates radially along the rotating shaft, and the limiting block comprises: A connecting sleeve, disposed in the through groove, and fixedly connected to the rotating shaft; The limiting protrusion protrudes along a side of the connecting sleeve away from the rotating shaft and abuts against a side surface of the smoothing plate facing the pole piece.

8. The tab smoothing mechanism according to claim 7, characterized in that: The through groove divides the connecting portion into two sleeves spaced apart in the axial direction of the rotating shaft, and the smoothing portion is connected to the two sleeves respectively.

9. The tab smoothing mechanism according to any one of claims 4 to 8, characterized in that: The tab smoothing mechanism further includes a control device, and the control device is electrically connected to the drive motor.

10. The tab smoothing mechanism according to claim 9, characterized in that: The tab smoothing mechanism further includes a sensing device, which is used to sense the distance between the rotating shaft and the tab, and the sensing device is electrically connected to the control device.

11. The tab smoothing mechanism according to any one of claims 4 to 8, characterized in that: The smoothing plate is arranged on one side of the pole piece in the third direction, and the support frame is provided with a plurality of mounting holes, which are arranged at intervals along the third direction.

12. A battery manufacturing device, characterized in that: The battery manufacturing equipment comprises a tab smoothing mechanism as claimed in any one of claims 1 to 11.

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