Winding device and pole piece rolling equipment

Abstract

The present application provides a winding device and a pole piece rolling device, the winding device includes a reel assembly and a cutting assembly, the reel assembly is provided with a reel, the reel is configured to rotate and wind the pole piece tape, the axis of the reel is arranged along the first direction; the cutting assembly is arranged upstream of the reel assembly, the cutting assembly is configured to cut the pole piece tape, the cutting assembly includes a moving mechanism and a cutting blade arranged on the moving mechanism, the moving mechanism drives the cutting blade to one end of the pole piece tape to be cut in the first direction and slides along the first direction for cutting. The moving mechanism can drive the cutting blade to slide along the first direction to cut the pole piece tape, and the pole piece tape is cut by cutting, and the fracture is flat and without sawtooth, which can reduce the extrusion of the next circle of pole piece tape after the fracture is rolled into the empty reel, improve the surface quality of the pole piece tape, reduce waste, and thus improve the production efficiency of the pole piece tape winding.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a winding device and a pole piece rolling 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 toy airplanes, electric tools, etc.

[0003] In the production of batteries, electrode winding is an important process, and the production efficiency in this process is not ideal. Summary of the invention

[0004] In view of the above problems, the present application provides a winding device and a pole piece rolling device, which is beneficial to improving the quality of the pole piece tape and reducing waste.

[0005] In the first aspect, the present application provides a winding device, which includes a reel assembly and a cutting assembly; the reel assembly is provided with a reel, which is configured to rotate and wind the pole piece tape, and the axis of the reel is arranged along a first direction; the cutting assembly is arranged upstream of the reel assembly, and the cutting assembly is configured to cut the pole piece tape, and the cutting assembly includes a moving mechanism and a cutting blade arranged on the moving mechanism, and the moving mechanism drives the cutting blade to one end of the pole piece tape to be cut in the first direction and slides along the first direction for cutting.

[0006] In the technical solution of the embodiment of the present application, the winding device includes a reel assembly and a cutting assembly, the reel assembly is provided with a reel, and the cutting assembly includes a moving mechanism and a cutting blade. The moving mechanism can drive the cutting blade to slide along the first direction to cut the electrode tape, and the electrode tape is cut by slicing, and the resulting fracture is smooth and without sawtooth, which can reduce the extrusion of the next circle of electrode tape after the fracture is rolled into the empty reel, improve the surface quality of the electrode tape, reduce waste, and thus improve the production efficiency of the electrode tape winding.

[0007] In some embodiments, the moving mechanism includes a first moving mechanism and a second moving mechanism; the first moving mechanism is configured to drive the cutting blade to translate along the second direction to approach or move away from the pole piece strip to be cut; the second moving mechanism is arranged on the first moving mechanism, the cutting blade is arranged on the second moving mechanism, and the second moving mechanism is configured to drive the cutting blade to cut the pole piece strip to be cut along the first direction; the first direction intersects with the second direction. When the first moving mechanism and the second moving mechanism drive the cutting blade to translate, the two motion trajectories of the cutting blade are both straight lines, which is convenient for controlling the motion trajectory, improving the motion accuracy, and thus improving the cutting quality.

[0008] In some embodiments, the first moving mechanism includes a first frame and a first driving element; the first frame includes a mounting portion, a guide portion and a limiting portion, the guide portion is connected to the mounting portion and the limiting portion respectively, the guide portion slides with the second moving mechanism in the second direction, and the limiting portion is configured to limit the second moving mechanism in the second direction; the first driving element is connected between the mounting portion and the second moving mechanism, and is configured to drive the second moving mechanism to slide in the second direction. The guide portion can provide a sliding guide to improve the movement accuracy of the cutting blade in the second direction; the limiting portion can provide a limit to improve the controllability of the cutting blade, so that the translation of the cutting blade is more reliable.

[0009] In some embodiments, the limiting part is provided with an adjusting member, the adjusting member includes an adjusting rod and a locking member; the adjusting rod is threadedly connected to the limiting part, and the axis of the adjusting rod is arranged parallel to the second direction; the locking member is threadedly connected to the adjusting rod and abuts against the limiting part. The adjusting member can adjust the stroke of the second moving mechanism and flexibly adapt to various working conditions; the fastener is threadedly connected to the adjusting rod and abuts against the limiting part at the same time, which can improve the reliability of the limiting.

[0010] In some embodiments, the second moving mechanism includes a second frame, a second driving element, a driving wheel, a driven wheel, a flexible member, a knife seat and a guide member; the second frame is slidably matched with the first moving mechanism; the second driving element is arranged on the second frame and is configured to provide rotational power; the driving wheel is rotatably arranged on the second frame and connected to the second driving element; the driven wheel is rotatably arranged on the second frame; the flexible member is arranged on the driving wheel and the driven wheel, and is in transmission cooperation with the driving wheel and the driven wheel; the knife seat is arranged on the flexible member, and the cutting blade is arranged on the knife seat; the guide member is arranged on the second frame and slidably matched with the knife seat, and the guide member is configured to provide guidance for the knife seat in the first direction. The cooperation of the second driving element, the driving wheel, the driven wheel and the flexible member can reduce the impact of the cutting blade on the pole piece belt and improve the cutting quality. The guide member is slidably matched with the knife seat, and can provide guidance for the translation of the cutting blade in the first direction and improve the cutting accuracy.

[0011] In some embodiments, the driving wheel and the driven wheel are both synchronous pulleys, and the flexible member is a synchronous belt. The flexible member is meshed with the driving wheel and the driven wheel for transmission, which can improve the accuracy of cutting the pole piece belt and alleviate the impact of the cutting blade on the pole piece belt; the guide member is a linear guide rail, which can improve the accuracy of cutting by the cutting blade.

[0012] In some embodiments, the second moving mechanism further includes a positioning member, and the positioning member includes a first positioning element, a second positioning element, a third positioning element, and a positioning reference member; the first positioning element is disposed on the second frame, and is configured to position the initial position of the cutting blade; the second positioning element is disposed on the second frame, and is configured to position the cutting start end of the cutting blade; the third positioning element is disposed on the second frame, and is configured to position the cutting end end of the cutting blade; the positioning reference member is disposed on the knife seat, and is configured to provide a positioning reference for the first positioning element, the second positioning element, and the third positioning element. The positioning member can mark the initial position, the cutting start end, and the cutting end end of the cutting blade, so as to facilitate flexible control of the cutting blade and improve cutting quality.

[0013] In some embodiments, the winding device further includes an adsorption assembly, which includes an adsorption chamber, a pressure gauge and a solenoid valve; the adsorption chamber is arranged on the moving mechanism, the adsorption chamber is provided with an adsorption surface, the adsorption surface is provided with adsorption holes, and the adsorption holes are configured to negatively adsorb the electrode tape in the first direction; the pressure gauge is connected to the adsorption chamber and is configured to detect the air pressure in the adsorption chamber; the solenoid valve is connected to the adsorption chamber and is configured to control the air pressure in the adsorption chamber. The adsorption chamber can fix the electrode tape and improve the cutting accuracy. The pressure gauge can improve the reliability of the adsorption chamber, and the solenoid valve can adjust the adsorption force to adapt to electrode tapes of different varieties and different specifications and sizes, thereby expanding applicability.

[0014] In some embodiments, the adsorption assembly further includes a baffle, the baffle including a connecting portion and a guiding portion; the connecting portion is configured to be adjustably arranged on the moving mechanism; the guiding portion is connected to the connecting portion, the guiding portion is provided with a guiding surface, and the guiding surface is configured to guide the pole piece belt to smoothly transition to the adsorption surface. The connecting portion can provide flexible adjustment for the installation position of the baffle on the second frame. The guiding portion can protect the surface of the pole piece belt and reduce the creases on the pole piece belt.

[0015] In some embodiments, the reel includes a first reel and a second reel, the first reel and the second reel are spaced apart in a third direction; the cutting assembly is located between the first reel and the second reel; the third direction intersects with the first direction. The first reel and the second reel are backups for each other, which can improve efficiency; using one cutting assembly to complete the cutting of the pole piece tapes on the first reel and the second reel can improve the utilization rate of the cutting assembly.

[0016] In some embodiments, the adsorption chamber includes a first adsorption chamber and a second adsorption chamber, and the first adsorption chamber and the second adsorption chamber are respectively arranged on both sides of the cutting edge in the third direction. The first adsorption chamber and the second adsorption chamber can fix the pole piece strip at both sides of the cutting edge at the same time, thereby improving the reliability of fixing the pole piece strip and thus improving the cutting quality.

[0017] In some embodiments, the winding device further includes a pressure roller assembly, which includes a roller frame, an auxiliary roller and a third driving element; the roller frame is arranged on the moving mechanism, and the roller frame is located between the second reel and the adsorption chamber in the third direction; the auxiliary roller is arranged on the roller frame, and the axis of the auxiliary roller is parallel to the first direction; the third driving element is arranged on the roller frame and connected to the auxiliary roller, and the third driving element is configured to drive the auxiliary roller to rotate forward and reverse. The auxiliary roller can abut against the pole piece tape roll on the second reel, and cooperate with the second reel to reel the pole piece tape, reduce wrinkles on the pole piece tape roll, and improve the quality of the pole piece tape.

[0018] In some embodiments, the winding device further comprises a translation assembly, the cutting assembly is arranged on the translation assembly, and the translation assembly is configured to drive the cutting assembly to translate in the third direction. The translation assembly cooperates with the pressure roller assembly, the adsorption assembly, and the cutting assembly to reduce wrinkles formed on the outer ring of the pole piece tape during winding, thereby improving the winding quality and reducing waste.

[0019] In a second aspect, the present application provides a pole piece rolling device, which includes the winding device in the above embodiment.

[0020] 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

[0021] 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:

[0022] Figure 1 A schematic diagram of a cutting component and an adsorption component in some embodiments of the present application at a viewing angle;

[0023] Figure 2 For this application Figure 1 A local enlarged schematic diagram at position Ⅰ;

[0024] Figure 3 For this application Figure 1 A local enlarged schematic diagram at position Ⅱ;

[0025] Figure 4 A schematic diagram of a cutting assembly and a pressing roller assembly in some embodiments of the present application at a viewing angle;

[0026] Figure 5 For this application Figure 4 A local enlarged schematic diagram at point III;

[0027] Figure 6 Schematic diagram of the winding device of some embodiments of the present application Figure 1 ;

[0028] Figure 7 Schematic diagram of the winding device of some embodiments of the present application Figure 2 ;

[0029] Figure 8 Schematic diagram of the winding device of some embodiments of the present application Figure 3 ;

[0030] Fig. 9 Schematic diagram of the winding device of some embodiments of the present application Figure 4 .

[0031] The reference numerals in the specific implementation manner are as follows:

[0032] 100-reeling device;

[0033] 10-reel assembly; 11-reel; 111-first reel; 112-second reel;

[0034] 20-cutting assembly; 21-moving mechanism; 211-first moving mechanism; 2111-first frame; 21111-installing part; 21112-guiding part; 21113-limiting part; 21114-adjusting member; 2112-first driving element; 212-second moving mechanism; 2121-second frame; 2122-second driving element; 2123-driven wheel; 2124-driving wheel; 2125-flexible member; 2126-knife seat; 2127-guiding member; 2128-positioning member; 21281-first positioning element; 21282-second positioning element; 21283-third positioning element; 21284-positioning reference member; 22-cutting blade;

[0035] 30-adsorption assembly; 31-adsorption chamber; 311-first adsorption chamber; 312-second adsorption chamber; 32-pressure gauge; 33-solenoid valve; 34-baffle; 341-connecting part; 342-guiding part;

[0036] 40-pressure roller assembly; 41-roller frame; 42-auxiliary roller; 43-third driving element;

[0037] 50-translational assembly;

[0038] 60-Automatic roll changing mechanism;

[0039] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0040] The following embodiments of the technical solution of the present application will be 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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).

[0046] 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. They 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.

[0047] 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.

[0048] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0049] As battery applications become more widespread, companies are placing higher and higher demands on the performance and quality of power batteries, while also striving to reduce production costs. Rolling can significantly increase the energy density of pole pieces and has high production efficiency, making it an indispensable process in pole piece production. The pole piece tape is automatically rewound after roller pre-slitting. How to cut the pole piece tape during rewinding, improve cutting quality, and reduce waste has become a problem that needs to be solved.

[0050] In the related art, a sawtooth cutter is used to cut the electrode tape. When cutting the electrode tape, the sawtooth cutter impacts the electrode tape, and its action process is to squeeze and puncture the surface of the electrode tape until the electrode tape is cut off, leaving a sawtooth fracture, which will be collected at the bottom of the material roll against the empty roll. In the process of winding the electrode tape on the roll, there are sharp teeth on the sawtooth fracture, which will leave convex points on the surface of the next turn of the electrode tape under the influence of tension during winding, or even puncture the electrode tape, resulting in abnormal quality waste of the electrode tape and increased production costs.

[0051] In order to improve the production efficiency of the pole piece tape winding, the fracture morphology of the pole piece tape can be improved. Specifically, the sharp structure at the fracture can be reduced, the serrated fracture can be changed to a flat fracture, and the sharp teeth can be removed, thereby improving the quality of the pole piece tape. Based on the above considerations, an embodiment of the present application provides a winding device 100, the winding device 100 includes a reel assembly 10 and a cutting assembly 20, the reel assembly 10 is provided with a reel, the reel is configured to rotate and wind the pole piece tape, and the axis of the reel is arranged along the first direction X. The cutting assembly 20 is arranged upstream of the reel assembly 10, and the cutting assembly 20 is configured to cut on the surface of the pole piece tape along the first direction X, thereby cutting the pole piece tape. When the cutting assembly 20 cuts the electrode tape, the cutting assembly 20 cuts from one end of the electrode tape to the other end along the first direction X (that is, the width direction of the electrode tape). The fracture formed after the electrode tape is cut is smooth and has no serrations, thereby reducing the extrusion of the fracture on the next circle of the electrode tape, improving the quality of the electrode tape, reducing waste, and thus improving the production efficiency of the electrode tape winding.

[0052] The winding device 100 provided in the embodiment of the present application can be applied to winding of the pole piece tape at various stages in the production process. For the sake of simplicity, the following embodiment is described by taking the pole piece rolling device as an example.

[0053] The pole piece rolling equipment includes a machine body, a unwinding assembly, a pressing assembly and a winding device 100. Among them, the unwinding assembly, the pressing assembly and the winding device 100 are all installed on the machine body, and the machine body is provided with an electric control system, which is respectively connected to the unwinding assembly, the pressing assembly and the winding device 100 to control the actions of the unwinding assembly, the pressing assembly and the winding device 100 during production. The pole piece tape to be pressed is provided on the unwinding assembly, and the pressing assembly is provided with a plurality of pressing rollers. The winding device 100 includes a reel assembly 10 and a cutting assembly 20. During production, the unwinding assembly releases the pole piece tape to be pressed, and the energy density of the pole piece tape is improved after being rolled by a plurality of pressing rollers. After rolling and pressing, the pole piece tape enters the winding device 100 for winding, wherein the cutting assembly 20 is located upstream of the reel assembly 10 along the transmission direction of the pole piece tape. The electrode tape is wound on the reel 11 at the winding device 100. As the reel 11 rotates, the electrode tape wound on the reel 11 gradually increases and the overall diameter gradually increases. After the electrode tape reaches a predetermined winding amount, the cutting component 20 cuts the electrode tape along the width direction of the electrode tape to form a smooth fracture.

[0054] Please refer to Figures 1 to 6 , Figure 1 A schematic diagram of a cutting component and an adsorption component in some embodiments of the present application at a viewing angle; Figure 2 For this application Figure 1 A local enlarged schematic diagram at position Ⅰ; Figure 3 For this application Figure 1 A local enlarged schematic diagram at position Ⅱ; Figure 4A schematic diagram of a cutting assembly and a pressing roller assembly in some embodiments of the present application at a viewing angle; Figure 5 For this application Figure 4 A local enlarged schematic diagram at point III; Figure 6 Schematic diagram of the winding device of some embodiments of the present application Figure 1 .

[0055] According to some embodiments of the present application, the present application provides a winding device 100, which includes a reel assembly 10 and a cutting assembly 20; the reel assembly 10 is provided with a reel 11, the reel 11 is configured to rotate and wind the pole piece tape, and the axis of the reel 11 is arranged along the first direction X; the cutting assembly 20 is arranged upstream of the reel assembly 10, and the cutting assembly 20 is configured to cut the pole piece tape, and the cutting assembly 20 includes a moving mechanism 21 and a cutting blade 22 arranged on the moving mechanism 21, and the moving mechanism 21 drives the cutting blade 22 to one end of the pole piece tape to be cut in the first direction X and slides on the surface of the pole piece tape along the first direction X for cutting.

[0056] The reel assembly 10 is a component for the winding device 100 to wind up the electrode tape. In the reel assembly 10, the number of reels 11 can be one or more. When there are multiple reels 11, the multiple reels 11 are arranged at intervals, and can receive the electrode tape simultaneously or sequentially and wind the electrode tape around themselves. When the reel 11 winds the electrode tape, it is realized by rotating itself. As a form of realizing the rotation of the reel 11, the reel 11 can be driven by a servo motor (driving a reducer or directly), thereby realizing the rotation of the reel 11.

[0057] Along the winding direction of the electrode, the cutting assembly 20 is located upstream of the reel assembly 10, and the electrode tape is cut after the electrode tape wound on the reel 11 reaches a predetermined amount. When cutting the electrode tape, the moving mechanism 21 first drives the cutting blade 22 to approach the electrode tape to be cut, and then drives the cutting blade 22 to translate along the first direction X from one end of the electrode tape to the other end, thereby realizing the cutting of the electrode tape.

[0058] When the moving mechanism 21 drives the cutting blade 22 to approach the pole piece band, there may be a variety of implementation forms.

[0059] Exemplarily, as an implementation form of the moving mechanism 21, the moving mechanism 21 first drives the cutting blade 22 along a curve to approach the pole piece band to be cut, and then drives the cutting blade 22 along the first direction X to cut the pole piece band to be cut. The moving mechanism 21 may include a curvilinear motion mechanism and a linear motion mechanism, the curvilinear motion mechanism includes a swing rod and a servo motor, the servo motor is connected to one end of the swing rod, and the linear motion mechanism is connected to the other end of the swing rod. The servo motor rotates to drive the swing rod to swing, and the linear motion mechanism located at the other end of the swing rod can approach the pole piece band to be cut along the curve. The curvilinear motion mechanism may also include a swing rod and a cylinder (or hydraulic cylinder), one end of the swing rod is rotatably connected to the main body of the winding device 100 (for example, hingedly connected), the other end of the swing rod is connected to the linear motion mechanism, the two ends of the swing rod are hinged to the drive rod of the cylinder, and the cylinder body of the cylinder is hinged to the main body of the winding device 100. When the drive rod of the cylinder is extended or contracted, it can drive the swing rod to swing, so that the linear motion mechanism can approach the pole piece band to be cut along the curve. The linear motion mechanism may include a power element, which is connected to the cutting blade 22 and drives the cutting blade 22 to translate in the first direction X. The power element may be a cylinder, a hydraulic cylinder, a linear motor, or the like.

[0060] Exemplarily, as another implementation form of the moving mechanism 21, the moving mechanism 21 first drives the cutting blade 22 to rotate to one end of the pole piece strip to be cut in the first direction X, and then drives the cutting blade 22 to cut the pole piece strip to be cut along the first direction X. The moving mechanism 21 may include a rotary motion mechanism and a linear motion mechanism, the rotary motion mechanism is mounted on the linear motion mechanism, the rotary motion mechanism may include a servo motor and a seat, the seat is mounted on the linear motion mechanism, the servo motor is mounted on the seat, and the cutting blade 22 is mounted on the servo motor. The linear motion mechanism may include a power element, and the power element may be a cylinder, a hydraulic cylinder, a linear motor, etc. When cutting the pole piece strip, the servo motor drives the cutting blade 22 to rotate to one end of the pole piece strip to be cut in the first direction X, and the projection of the pole piece strip intersects with the projection of the cutting blade 22 when projected along the first direction X. The power element drives the cutting blade 22 to translate along the first direction X, thereby cutting off the pole piece strip to be cut.

[0061] Exemplarily, as another implementation form of the moving mechanism 21, the moving mechanism 21 first drives the cutting blade 22 to approach the pole piece strip to be cut along a straight line, and then drives the cutting blade 22 to cut the pole piece strip to be cut along the first direction X. The moving mechanism 21 may include two linear motion mechanisms, one of which drives the cutting blade 22 to approach the pole piece strip to be cut, and the other linear motion mechanism drives the cutting blade 22 to cut the pole piece strip to be cut along the first direction X.

[0062] The cutting blade 22 is a component of the cutting assembly 20 that directly cuts the pole piece strip. The cutting blade 22 is provided with a cutting end, which can be arranged perpendicular to the first direction X or form an acute angle with the first direction X.

[0063] In the technical solution of the embodiment of the present application, the winding device 100 includes a reel assembly 10 and a cutting assembly 20, the reel assembly 10 is provided with a reel 11, and the cutting assembly 20 includes a moving mechanism 21 and a cutting blade 22. After the pole piece tape wound on the reel 11 reaches a predetermined amount, the moving mechanism 21 drives the cutting blade 22 to approach the pole piece tape to be cut, and the cutting blade 22 reaches one end of the pole piece tape to be cut in the first direction X (the width direction of the pole piece tape), and then the moving mechanism 21 drives the cutting blade 22 to slide along the first direction X to cut the pole piece tape, thereby cutting the pole piece tape to form a flat fracture. When cutting the pole piece tape, the cutting assembly 20 drives the cutting blade 22 to cut from one end to the other end in the width direction of the pole piece tape, and cuts the pole piece tape by cutting, so that the fracture is flat and has no sawtooth, which can reduce the extrusion of the next circle of pole piece tape after the fracture enters the empty reel 11, improve the surface quality of the pole piece tape, reduce waste, and thus improve the production efficiency of the pole piece tape winding.

[0064] According to some embodiments of the present application, optionally, the moving mechanism 21 includes a first moving mechanism 211 and a second moving mechanism 212; the first moving mechanism 211 is configured to drive the cutting blade 22 to translate along the second direction Y to approach or move away from the electrode strip to be cut; the second moving mechanism 212 is arranged on the first moving mechanism 211, and the cutting blade 22 is arranged on the second moving mechanism 212, and the second moving mechanism 212 is configured to drive the cutting blade 22 to cut the electrode strip to be cut along the first direction X; the first direction X intersects with the second direction Y.

[0065] The first moving mechanism 211 and the second moving mechanism 212 are both mechanisms that can achieve linear motion. The first moving mechanism 211 drives the second moving mechanism 212 and the cutting blade 22 to move along the second direction Y, and the second moving mechanism 212 drives the cutting blade 22 to move along the first direction X. The first direction X intersects with the second direction Y, that is, the first direction X and the second direction Y are not parallel, for example, the first direction X and the second direction Y form an angle, which may be an acute angle, a right angle, or an obtuse angle.

[0066] Exemplarily, when the first moving mechanism 211 or the second moving mechanism 212 realizes linear motion, the cutting blade 22 can be directly driven by a power element to realize movement, and the power element can be a cylinder, a hydraulic cylinder, or a linear motor; the power element can also drive a transmission mechanism, and the transmission mechanism can drive the cutting blade 22 to realize translation, and the power element can be a servo motor, and the transmission mechanism can be a gear rack transmission mechanism, a screw pair transmission mechanism, a sprocket chain transmission mechanism, a pulley belt transmission mechanism, etc.

[0067] In the technical solution of the embodiment of the present application, the first moving mechanism 211 drives the cutting blade 22 to translate along the second direction Y, and the second moving mechanism 212 drives the cutting blade 22 to translate along the first direction X. The two motion trajectories of the cutting blade 22 are both straight lines, which facilitates the control of the motion trajectory, improves the motion accuracy, and thus improves the cutting quality.

[0068] like Figures 1 to 3 As shown, according to some embodiments of the present application, optionally, the first moving mechanism 211 includes a first frame 2111 and a first driving element 2112; the first frame 2111 includes a mounting portion 21111, a guide portion 21112 and a limiting portion 21113, the guide portion 21112 is respectively connected to the mounting portion 21111 and the limiting portion 21113, the guide portion 21112 is slidably matched with the second moving mechanism 212 in the second direction Y, and the limiting portion 21113 is configured to limit the second moving mechanism 212 in the second direction Y; the first driving element 2112 is connected between the mounting portion 21111 and the second moving mechanism 212, and is configured to drive the second moving mechanism 212 to slide in the second direction Y.

[0069] The mounting portion 21111 of the first frame 2111 is used to provide a mounting position for the guide portion 21112 and the first driving element 2112. The mounting portion 21111, the guide portion 21112 and the limiting portion 21113 can be integrally formed or can be formed by splicing in separate parts.

[0070] The guide portion 21112 of the first frame 2111 is slidably matched with the second mobile mechanism 212 to provide guidance for the translation of the second mobile mechanism 212. Exemplarily, a guide rail is installed on the guide portion 21112, and a slider is installed on the second mobile mechanism 212. The guide rail and the slider are slidably matched, so as to provide a sliding guide for the second mobile mechanism 212.

[0071] The limiting portion 21113 of the first frame 2111 is disposed on the guide portion 21112. The limiting portion 21113 is located at the end of the guide portion 21112 in the second direction Y, which can be one end or both ends. When the second moving mechanism 212 slides along the second direction Y, the limiting portion 21113 can abut against the second moving mechanism 212, thereby providing a limit for the second moving mechanism 212 and limiting the travel of the second moving mechanism 212 in the second direction Y.

[0072] The first driving element 2112 is mounted on the mounting portion 21111 and connected to the second moving mechanism 212 to provide a driving force for the second moving mechanism 212 to slide in the second direction Y. For example, the first driving element 2112 may be a cylinder, a hydraulic cylinder, a linear motor, or the like.

[0073] In the technical solution of the embodiment of the present application, the first moving mechanism 211 includes a first frame 2111 and a first driving element 2112, and the first frame 2111 includes a mounting portion 21111, a guide portion 21112 and a limit portion 21113. The guide portion 21112 can provide a sliding guide for the second moving mechanism 212 in the second direction Y, thereby improving the movement accuracy of the cutting blade 22 in the second direction Y. The limit portion 21113 can provide a limit for the second moving mechanism 212 in the second direction Y, thereby limiting the stroke of the cutting blade 22 in the second direction Y, improving the controllability of the cutting blade 22, and making the translation of the cutting blade 22 more reliable.

[0074] like Figures 1 to 3 As shown, according to some embodiments of the present application, optionally, an adjusting member 21114 is provided on the limiting portion 21113, and the adjusting member 21114 includes an adjusting rod and a locking member; the adjusting rod is threadedly connected to the limiting portion 21113, and the axis of the adjusting rod is arranged parallel to the second direction Y; the locking member is threadedly connected to the adjusting rod and abuts against the limiting portion 21113.

[0075] The adjusting rod is used to limit the stroke of the second moving mechanism 212, and the second moving mechanism 212 reaches the maximum stroke when it abuts against the adjusting rod. The outer circumference of the adjusting rod is provided with threads, and the adjusting rod is installed on the limiting portion 21113 in the form of threaded connection. The axis of the adjusting rod is parallel to the second direction Y. By adjusting the part where the adjusting rod is threadedly connected to the limiting portion 21113, the limiting amount of the adjusting rod in the second direction Y can be adjusted. Exemplarily, the adjusting rod can be a bolt, a stud, a rod with an external thread processed on the outer circumference, etc.

[0076] The locking member is connected to the adjusting rod by a threaded connection, and when the locking member abuts against the limiting portion 21113, the adjusting rod can be fastened by using the double nut anti-loosening principle. For example, the locking member can be a nut.

[0077] The limit portion 21113 is provided with a threaded hole for installing the adjusting rod. During assembly, the adjusting rod is screwed into the threaded hole, and the length of the adjusting rod screwed into the threaded hole is controlled by a predetermined limit amount. After the adjusting rod is assembled, the locking member is threadedly connected to the adjusting rod while abutting against the limit portion 21113 to fix the adjusting rod.

[0078] In the technical solution of the embodiment of the present application, the limit portion 21113 can adjust the limit of the second mobile mechanism 212 by setting the adjustment member 21114, so that the stroke of the second mobile mechanism 212 can be adjusted to flexibly adapt to various working conditions. The adjustment rod is threadedly connected to the limit portion 21113, and the fastener is threadedly connected to the adjustment rod and abuts against the limit portion 21113 at the same time, which can tighten the adjustment rod and reduce the looseness of the adjustment rod, thereby improving the reliability of the limit.

[0079] like Figures 1 to 3 As shown, according to some embodiments of the present application, optionally, the second moving mechanism 212 includes a second frame 2121, a second driving element 2122, a driving wheel 2124, a driven wheel 2123, a flexible member 2125, a knife seat 2126 and a guide member 2127; the second frame 2121 is slidably matched with the first moving mechanism 211; the second driving element 2122 is disposed on the second frame 2121 and is configured to provide rotational power; the driving wheel 2124 is rotatably disposed on the second frame 2121 and is rotatably matched with the second driving element 2122. The element 2122 is connected; the driven wheel 2123 is rotatably arranged on the second frame 2121; the flexible member 2125 is arranged on the driving wheel 2124 and the driven wheel 2123, and cooperates with the driving wheel 2124 and the driven wheel 2123 in transmission; the knife seat 2126 is arranged on the flexible member 2125, and the cutting blade 22 is arranged on the knife seat 2126; the guide member 2127 is arranged on the second frame 2121, and slidably cooperates with the knife seat 2126, and the guide member 2127 is configured to provide guidance for the knife seat 2126 in the first direction X.

[0080] The length direction of the second frame 2121 is along the first direction X. The second frame 2121 is used to provide a mounting position for the second driving element 2122 , the driving wheel 2124 , the driven wheel 2123 , and the guide member 2127 .

[0081] The second driving element 2122 is mounted on the second frame 2121 to drive the driving wheel 2124 to rotate. For example, the second driving element 2122 is a servo motor, and is connected to the rotating shaft of the driving wheel 2124 through a coupling to drive the driving wheel 2124 to rotate.

[0082] The driving wheel 2124 and the driven wheel 2123 are rotatably mounted on the second frame 2121, and both the driving wheel 2124 and the driven wheel 2123 can be connected to the second frame 2121 through bearings. Along the first direction X, the driving wheel 2124 is close to one end of the second frame 2121, and the driven wheel 2123 is close to the other end of the second frame 2121. The plane where the axis of the driving wheel 2124 and the axis of the driven wheel 2123 are located is parallel to the first direction X.

[0083] The flexible member 2125 is sleeved on the driving wheel 2124 and the driven wheel 2123. When the driving wheel 2124 rotates, the driven wheel 2123 can be driven to rotate through the flexible member 2125. Exemplarily, the flexible member 2125 can be a belt or a chain, and correspondingly, the driving wheel 2124 and the driven wheel 2123 can both be pulleys or sprockets.

[0084] The knife seat 2126 is mounted on the flexible member 2125 to provide a mounting position for the cutting blade 22. The knife seat 2126 is located between the driving wheel 2124 and the driven wheel 2123 in the first direction X. When the flexible member 2125 is driven, the knife seat 2126 can translate in the first direction X.

[0085] The guide member 2127 is mounted on the second frame 2121 , and the length direction of the guide member 2127 is parallel to the first direction X. The guide member 2127 is slidably matched with the knife holder 2126 , and can provide a sliding guide for the knife holder 2126 in the first direction X. The knife holder 2126 slides in the first direction X along the guide member 2127 driven by the flexible member 2125 .

[0086] In the technical solution of the embodiment of the present application, the second moving mechanism 212 includes a second frame 2121, a second driving element 2122, a driving wheel 2124, a driven wheel 2123, a flexible member 2125, a knife seat 2126 and a guide member 2127. The second driving element 2122, the driving wheel 2124, the driven wheel 2123 and the flexible member 2125 cooperate to drive the cutting blade 22 to translate in the first direction X, and the flexible member 2125 has a certain flexibility and elasticity, which can reduce the impact of the cutting blade 22 on the pole piece belt and improve the cutting quality. The guide member 2127 slides with the knife seat 2126 to provide guidance for the translation of the cutting blade 22 in the first direction X and improve the cutting accuracy.

[0087] like Figures 1 to 3 As shown, according to some embodiments of the present application, optionally, the driving wheel 2124 and the driven wheel 2123 are both synchronous pulleys; the flexible member 2125 is a synchronous belt; the flexible member 2125 meshes with the driving wheel 2124 and the driven wheel 2123 for transmission; and the guide member 2127 is a linear guide rail.

[0088] The driving wheel 2124 and the driven wheel 2123 are provided with teeth on their circumferential surfaces, and the flexible member 2125 is also provided with teeth, and the driving wheel 2124 and the driven wheel 2123 are respectively meshed with the flexible member 2125 for transmission. When meshing transmission, the outer diameters of the driving wheel 2124 and the driven wheel 2123 can be the same or different.

[0089] For example, the driving wheel 2124 and the driven wheel 2123 have the same outer diameter and the same number of teeth, which can improve the interchangeability of the driving wheel 2124 and the driven wheel 2123. The second moving mechanism 212 can be provided with a tensioning wheel to control the tension of the flexible member 2125, or the second moving mechanism 212 may not be provided with a tensioning wheel.

[0090] In the technical solution of the embodiment of the present application, the driving wheel 2124 and the driven wheel 2123 are both synchronous pulleys, and the flexible member 2125 is a synchronous belt, which has a constant transmission ratio during transmission, and can improve the accuracy of cutting the pole piece belt. At the same time, the flexible member 2125 also has the characteristics of belt transmission buffering and vibration absorption, which can alleviate the impact of the cutting blade 22 on the pole piece belt. The guide member 2127 is a linear guide rail, which can improve the accuracy of the cutting blade 22 during cutting.

[0091] like Figures 1 to 3 As shown, according to some embodiments of the present application, optionally, the second moving mechanism 212 also includes a positioning member 2128, and the positioning member 2128 includes a first positioning element 21281, a second positioning element 21282, a third positioning element 21283 and a positioning reference member 21284; the first positioning element 21281 is arranged on the second frame 2121, and is configured to position the initial position of the cutting blade 22; the second positioning element 21282 is arranged on the second frame 2121, and is configured to position the cutting starting end of the cutting blade 22; the third positioning element 21283 is arranged on the second frame 2121, and is configured to position the cutting ending end of the cutting blade 22; the positioning reference member 21284 is arranged on the knife seat 2126, and is configured to provide a positioning reference for the first positioning element 21281, the second positioning element 21282, and the third positioning element 21283.

[0092] The first positioning element 21281, the second positioning element 21282, and the third positioning element 21283 are all installed on the second frame 2121. In the first direction X, the second positioning element 21282 is located between the first positioning element 21281 and the third positioning element 21283, and the distance between the second positioning element 21282 and the first positioning element 21281 is greater than the distance between the second positioning element 21282 and the third positioning element 21283.

[0093] The positioning reference member 21284 is mounted on the knife seat 2126 as a positioning reference for the cutting blade 22. The positioning reference member 21284 cooperates with the first positioning element 21281, the second positioning element 21282, and the third positioning element 21283 to mark the initial position, cutting start end, and cutting end end of the cutting blade 22.

[0094] The cutting blade 22 does not contact the pole piece tape between the initial position and the cutting starting end, and the cutting blade 22 cuts the pole piece tape from the cutting starting end to the cutting ending end, thereby dividing the cutting stroke of the cutting blade 22 into two parts in the first direction X, so as to facilitate differentiated control of the stroke of the cutting blade 22 (for example, the moving speed of the cutting blade 22 can be differentiated when not cutting the pole piece tape and when cutting the pole piece tape), and reduce the possibility of interference between the cutting blade 22 and the pole piece tape (for example, when the moving mechanism 21 drives the cutting blade 22 to translate along the second direction Y, the cutting blade 22 is placed in the initial position, which can reduce the possibility of interference between the cutting blade 22 and the pole piece).

[0095] Exemplarily, the first positioning element 21281 , the second positioning element 21282 , and the third positioning element 21283 are all slot-type photoelectric sensors, and the positioning reference member 21284 is a light shielding sheet installed on the tool holder 2126 .

[0096] In the technical solution of the embodiment of the present application, the positioning member 2128 includes a first positioning element 21281, a second positioning element 21282, a third positioning element 21283 and a positioning reference member 21284, which can calibrate the initial position, the starting end and the ending end of the cutting blade 22, so as to facilitate flexible control of the cutting blade 22 and improve the cutting quality.

[0097] like Figures 1 to 3 As shown, according to some embodiments of the present application, optionally, the winding device 100 also includes an adsorption component 30, the adsorption component 30 includes an adsorption chamber 31, a pressure gauge 32 and a solenoid valve 33; the adsorption chamber 31 is arranged on the moving mechanism 21, the adsorption chamber 31 is provided with an adsorption surface, the adsorption surface is provided with adsorption holes, and the adsorption holes are configured to negatively adsorb the electrode strip in the first direction X; the pressure gauge 32 is connected to the adsorption chamber 31, and is configured to detect the air pressure in the adsorption chamber 31; the solenoid valve 33 is connected to the adsorption chamber 31, and is configured to control the air pressure in the adsorption chamber 31.

[0098] The adsorption chamber 31 is connected to an external pump source through a pipeline, and under the suction effect of the pump source, a negative pressure can be formed in the adsorption chamber 31. When the adsorption chamber 31 is close to the pole piece belt, the adsorption surface can generate suction through the adsorption holes, thereby fixing the pole piece belt on the adsorption surface.

[0099] The pressure gauge 32 can be installed on the adsorption chamber 31 and directly connected to the adsorption chamber 31; the pressure gauge 32 can also be installed on the pipeline and indirectly connected to the adsorption chamber 31. The solenoid valve 33 can be installed on the adsorption chamber 31 and directly connected to the adsorption chamber 31; the solenoid valve 33 can also be installed on the pipeline and indirectly connected to the adsorption chamber 31.

[0100] For example, when the pressure gauge 32 and the solenoid valve 33 are installed on the pipeline, the first frame 2111 can be selected as the basis and fixed on the first frame 2111. The pressure gauge 32 is located between the solenoid valve 33 and the adsorption chamber 31, and is always connected to the adsorption chamber 31 to detect the actual pressure in the adsorption chamber 31 in real time. The solenoid valve 33 can adjust the opening, thereby adjusting the air pressure in the adsorption chamber 31 and the on-off of the pipeline.

[0101] In the technical solution of the embodiment of the present application, the winding device 100 is provided with an adsorption component 30. The adsorption chamber 31 of the adsorption component 30 can adsorb the electrode tape on the adsorption surface, fix the electrode tape, facilitate cutting of the electrode tape, and improve cutting accuracy. The adsorption component 30 is provided with a pressure gauge 32. The pressure gauge 32 can detect the actual pressure of the adsorption chamber 31, improve the reliability of the adsorption chamber 31, reduce the abnormal operation of the adsorption chamber 31 when the adsorption force is too large or too small (the adsorption force is too large and may damage the electrode tape, and the adsorption force is too small and may cause the electrode tape to fall), and reduce the waste of the electrode. The adsorption component 30 is provided with a solenoid valve 33, and the adsorption force can be adjusted by the solenoid valve 33, so as to further improve the reliability of the adsorption chamber 31, and can also adapt to different varieties and different specifications and sizes of electrode tapes, and expand the applicability.

[0102] like Figures 1 to 3 As shown, according to some embodiments of the present application, optionally, the adsorption assembly 30 also includes a baffle 34, the baffle 34 includes a connecting portion 341 and a guiding portion 342; the connecting portion 341 is configured to be adjustably arranged on the moving mechanism 21; the guiding portion 342 is connected to the connecting portion 341, and the guiding portion 342 is provided with a guiding surface, and the guiding surface is configured to guide the pole piece belt to smoothly transition to the connecting portion 341.

[0103] The connecting portion 341 is a portion of the baffle 34 used to connect to the moving mechanism 21 . The connecting portion 341 is adjustably mounted on the second frame 2121 . In the second direction Y, the mounting position of the connecting portion 341 on the second frame 2121 is adjustable.

[0104] Exemplarily, the connecting portion 341 is provided with an elongated hole, and the length direction of the elongated hole is parallel to the second direction Y. The second frame 2121 is provided with a threaded hole, and the baffle 34 can be fastened to the second frame 2121 by inserting a bolt through the elongated hole and the threaded hole in sequence. When adjusting the installation position of the baffle 34, the bolt can be loosened first, and then the position of the baffle 34 can be adjusted along the second direction Y and then the bolt can be tightened. The provision of the elongated hole can leave an adjustment amount for the baffle 34.

[0105] The guide portion 342 is connected to the connecting portion 341, and the guide portion 342 and the connecting portion 341 can be integrally arranged, that is, the baffle 34 is integrally formed. The guide portion 342 and the connecting portion 341 can also be separately arranged. The guide surface is the surface of the guide portion 342 that receives the pole piece belt. Exemplarily, the guide surface is arc-shaped and extends in a direction away from the adsorption chamber 31. Specifically, the guide surface is arc-shaped, and the middle part of the arc is raised toward the pole piece belt.

[0106] When the adsorption assembly 30 approaches the electrode strip along the second direction Y, the guide surface first contacts the electrode strip, and then the adsorption surface fits the electrode strip. The guide surface is arc-shaped, so that the electrode strip can smoothly transition from fitting the guide surface to contacting the adsorption surface.

[0107] In the technical solution of the embodiment of the present application, the adsorption assembly 30 is provided with a baffle 34, and the baffle 34 includes a connecting portion 341 and a guiding portion 342. The connecting portion 341 can provide flexible adjustment for the installation position of the baffle 34 on the second frame 2121. The guiding portion 342 receives the pole piece belt through the guiding surface, and can smoothly transition the pole piece belt to the adsorption surface, reduce the collision between the pole piece belt and the edge of the adsorption surface, effectively protect the surface of the pole piece belt, and reduce the crease on the pole piece belt.

[0108] Please refer to Figures 7 to 9 , Figure 7 Schematic diagram of the winding device of some embodiments of the present application Figure 2 ; Figure 8 Schematic diagram of the winding device of some embodiments of the present application Figure 3 ; Fig. 9 Schematic diagram of the winding device of some embodiments of the present application Figure 4 .in, Figures 7 to 9 The middle dotted line represents the displacement process of the pole piece strip under the action of the automatic roll-changing mechanism 60 .

[0109] According to some embodiments of the present application, optionally, the roll 11 includes a first roll 111 and a second roll 112, and the first roll 111 and the second roll 112 are spaced apart in a third direction Z; the cutting assembly 20 is located between the first roll 111 and the second roll 112; the third direction Z intersects with the first direction X.

[0110] The first direction X, the second direction Y, and the third direction Z intersect each other. For example, the first direction X, the second direction Y, and the third direction Z may be perpendicular to each other. With the third direction Z as the vertical direction, the first direction X and the second direction Y may be two directions perpendicular to each other on the horizontal plane. The reel 11 includes a first reel 111 and a second reel 112. The first reel 111 and the second reel 112 are backups for each other, one for use and one for backup. The first reel 111 is located above the second reel 112.

[0111] In the technical solution of the embodiment of the present application, the reel 11 includes a first reel 111 and a second reel 112, which serve as backup for each other to improve efficiency. The cutting assembly 20 is located between the first reel 111 and the second reel 112, and the cutting of the pole piece tapes on the first reel 111 and the second reel 112 is completed by using one cutting assembly 20, which can improve the utilization rate of the cutting assembly 20.

[0112] like Figure 2 As shown, according to some embodiments of the present application, optionally, the adsorption chamber 31 includes a first adsorption chamber 311 and a second adsorption chamber 312 , and the first adsorption chamber 311 and the second adsorption chamber 312 are respectively arranged on both sides of the cutting edge 22 in the third direction Z.

[0113] The first adsorption chamber 311 is located between the cutting blade 22 and the first reel 111, and the second adsorption chamber 312 is located between the cutting blade 22 and the second reel 112. The first adsorption chamber 311 and the second adsorption chamber 312 can be independent of each other, and are respectively equipped with a pressure gauge 32 and a solenoid valve 33. When cutting the electrode tape, the first adsorption chamber 311 and the second adsorption chamber 312 simultaneously adsorb the electrode tape to fix it.

[0114] In the technical solution of the embodiment of the present application, the adsorption chamber 31 includes a first adsorption chamber 311 and a second adsorption chamber 312, which can fix the electrode strip on both sides of the cutting blade 22 at the same time, thereby improving the reliability of fixing the electrode strip and thus improving the cutting quality.

[0115] like Figure 4 and Figure 5 As shown, according to some embodiments of the present application, optionally, the winding device 100 also includes a pressure roller assembly 40, the pressure roller assembly 40 includes a roller frame 41, an auxiliary roller 42 and a third driving element 43; the roller frame 41 is arranged on the moving mechanism 21, and the roller frame 41 is located between the second reel 112 and the adsorption chamber 31 in the third direction Z; the auxiliary roller 42 is arranged on the roller frame 41, and the axis of the auxiliary roller 42 is parallel to the first direction X; the third driving element 43 is arranged on the roller frame 41 and is connected to the auxiliary roller 42, and the third driving element 43 is configured to drive the auxiliary roller 42 to rotate forward and reverse.

[0116] The roller frame 41 is installed on the second frame body 2121 to provide an installation position for the auxiliary roller 42 and the third driving element 43. The spatial position of the auxiliary roller 42 can be limited to be located between the second adsorption chamber 312 and the second reel 112 in the third direction Z.

[0117] The auxiliary roller 42 is rotatably mounted on the roller frame 41, and the third driving element 43 is mounted on the roller frame 41 and connected to the auxiliary roller 42, and can drive the auxiliary roller 42 to rotate. The forward rotation and the reverse rotation of the auxiliary roller 42 are two rotation directions of the roller, and the forward rotation can be counterclockwise rotation, and the reverse rotation can be clockwise rotation.

[0118] Exemplarily, the auxiliary roller 42 can be rotatably connected to the roller frame 41 through a bearing, and the third driving element 43 can be a servo motor, which drives the auxiliary roller 42 through a reducer or directly, and when connected to the auxiliary roller 42, the connection can be achieved through a coupling.

[0119] The auxiliary roller 42 is used to cooperate with the second reel 112 to reel or adjust the pole piece tape. When the auxiliary roller 42 abuts against the pole piece tape on the second reel 112, pressure can be applied to the pole piece tape. There are many types of auxiliary rollers 42. For example, the auxiliary roller 42 can be a brush roller, a rubber roller, a steel roller, etc.

[0120] In the technical solution of the embodiment of the present application, the winding device 100 includes a pressure roller assembly 40, and the pressure roller assembly 40 includes a roller frame 41, an auxiliary roller 42 and a third driving element 43. The auxiliary roller 42 is located between the second adsorption chamber 312 and the second reel 112, and can abut against the pole piece tape roll on the second reel 112, and rotate in coordination with the second reel 112 under the action of the third driving element 43, so as to retract the pole piece tape near the break into the pole piece tape roll on the second reel 112, reduce the wrinkles on the pole piece tape roll, and thus improve the quality of the pole piece tape. At the same time, the reduction of wrinkles on the pole piece tape roll can also reduce the misjudgment of the break by the automatic gluing mechanism (misjudging wrinkles as breaks), thereby reducing the waste of pole pieces caused by the wrong gluing position.

[0121] like Figures 7 to 9 As shown, according to some embodiments of the present application, optionally, the winding device 100 further includes a translation assembly 50, the cutting assembly 20 is disposed on the translation assembly 50, and the translation assembly 50 is configured to drive the cutting assembly 20 to translate in a third direction Z.

[0122] The translation assembly 50 is installed on the main body of the winding device 100 to provide an installation position for the cutting assembly 20. The translation assembly 50 is a mechanism that can realize linear motion, and can drive the cutting assembly 20 to translate in the third direction Z. Exemplarily, the translation assembly 50 can directly drive the cutting assembly 20 to translate in the third direction Z through a cylinder, a hydraulic cylinder, a linear motor, etc.; the translation assembly 50 can also indirectly drive the cutting assembly 20 to translate in the third direction Z through a gear rack drive, a belt drive, a chain drive, etc.

[0123] The first reel 111 and the second reel 112 are arranged vertically, and the second reel 112 is located below the first reel 111. When the second reel 112 is fully wound and the first reel 111 needs to be switched, the electrode tape needs to be cut at a position close to the first reel 111 so that the electrode tape can be brought into the first reel 111. At this time, the translation assembly 50 can drive the cutting assembly 20 to approach the first reel 111 along the third direction Z. Conversely, when the electrode tape on the first reel 111 needs to be cut, the translation assembly 50 can drive the cutting assembly 20 to approach the second reel 112 along the third direction Z.

[0124] like Figure 7 and Figure 8 As shown, after the cutting blade 22 cuts the electrode tape at a position close to the first reel 111, if the electrode tape falls by its own weight, it is easy to be squeezed and wrinkled during the falling process, resulting in the inability of the automatic gluing equipment to accurately identify the fracture, and the failure of the tail glue sticking causes waste. Therefore, after the cutting blade 22 cuts the electrode tape, the second adsorption chamber 312 continues to adsorb the electrode tape, the second reel 112 rotates, and the translation assembly 50 drives the second adsorption chamber 312 to move downward synchronously until the auxiliary roller 42 abuts against the electrode tape roll on the second reel 112, and the auxiliary roller 42 rotates towards the second reel 112, and the second reel 112 can pull the electrode tape out of the second adsorption chamber 312, and the section of the electrode tape can be rolled into the second reel 112 with high quality under the clamping of the second reel 112 and the auxiliary roller 42, thereby reducing the wrinkles formed on the electrode tape. In addition, when the second reel 112 rotates in the opposite direction, the auxiliary roller 42 can also rotate in the opposite direction to the second reel 112 under the drive of the third driving element 43, so as to turn the broken end of the electrode tape on the second reel 112 to the gluing position.

[0125] In the technical solution of the embodiment of the present application, the winding device 100 is provided with a translation assembly 50, which cooperates with the pressure roller assembly 40, the adsorption assembly 30, and the cutting assembly 20 to reduce the wrinkles formed on the outer ring of the pole piece tape during winding, thereby improving the winding quality. During cutting, the translation assembly 50 drives the cutting assembly 20 to approach the empty reel 11 to be wound, which can shorten the length of the tail material after the pole piece tape is cut and reduce waste.

[0126] The embodiment of the present application further provides a pole piece rolling device, which includes the winding device 100 provided in the above embodiments.

[0127] like Figures 1 to 9As shown, according to some embodiments of the present application, the present application provides a winding device 100, which includes a reel assembly 10, a cutting assembly 20, an adsorption assembly 30, a pressure roller assembly 40 and a translation assembly 50. Take the first direction X and the second direction Y as two directions perpendicular to each other in the horizontal plane, and the third direction Z as the vertical direction as an example for introduction. The axis of the reel 11 of the reel assembly 10 is arranged along the first direction X, and the reel 11 includes a first reel 111 and a second reel 112 arranged at intervals, and the second reel 112 is located below the first reel 111. The cutting assembly 20 includes a moving mechanism 21 and a cutting blade 22, and the moving mechanism 21 includes a first moving mechanism 211 and a second moving mechanism 212. The first moving mechanism 211 drives the cutting blade 22 to translate along the second direction Y, and the second moving mechanism 212 drives the cutting blade 22 to translate along the first direction X. The adsorption assembly 30 includes an adsorption chamber 31, a baffle 34, a pressure gauge 32 and a solenoid valve 33. The adsorption chamber 31 includes a first adsorption chamber 311 and a second adsorption chamber 312. The first adsorption chamber 311 is located above the cutting blade 22, and the second adsorption chamber 312 is located below the cutting blade 22. There are two baffles 34, which are respectively installed above the first adsorption chamber 311 and below the second adsorption chamber 312. The pressure roller assembly 40 includes a roller frame 41, an auxiliary roller 42 and a third driving element 43. The auxiliary roller 42 is installed on the roller frame 41 and is located between the second adsorption chamber 312 and the second reel 112. The third driving element 43 is a servo motor, which drives the auxiliary roller 42 to rotate. The cutting assembly 20 is installed on the translation assembly 50, and is driven by the translation assembly 50 to translate (move up and down) along the third direction Z to approach the first reel 111 or the second reel 112.

[0128] like Figure 7 As shown, the second reel 112 is fully rolled, and the winding device 100 stops when receiving the reel-changing instruction. The reel-changing pressure roller presses the pole piece tape onto the first reel 111 so that the first reel 111 can wind the pole piece tape. The translation assembly 50 drives the cutting assembly 20 to move up and approach the first reel 111. The first driving element 2112 (which can be a cylinder) pushes the first adsorption chamber 311, the second adsorption chamber 312, and the second moving element along the second direction Y to the position close to the pole piece tape to be cut. The first adsorption chamber 311 and the second adsorption chamber 312 are respectively adsorbed on the surface of the pole piece tape, and the second driving element 2122 drives the cutting blade 22 to cut the pole piece tape along the first direction X. The cutting blade 22 resets to the initial position after cutting the pole piece tape. The first adsorption chamber 311 stops adsorption, and the first reel 111 starts to wind the pole piece tape. As shown Figure 8As shown, the second adsorption chamber 312 continuously adsorbs the electrode tape, and while the second reel 112 rotates, the translation assembly 50 drives the second adsorption chamber 312 to translate toward the second reel 112 until the auxiliary roller 42 abuts against the electrode tape roll on the second reel 112. The second reel 112 removes the portion of the electrode tape close to the fracture from the second adsorption chamber 312, and this portion of the electrode tape is collected on the second reel 112 under the coordinated action of the second reel 112 and the auxiliary roller 42.

[0129] like Fig. 9 As shown, the first reel 111 is fully wound, and the winding device 100 stops when receiving the reel change command. The reel change roller presses the electrode tape onto the second reel 112 so that the second reel 112 can wind the electrode tape. The cutting blade 22 cuts the electrode tape near the second reel 112, and the first reel 111 rotates to roll up the portion of the electrode tape near the cut end. This portion naturally droops under the action of its own weight, which can reduce wrinkles during winding.

[0130] The roll-changing pressure roller is a component of the automatic roll-changing mechanism 60 on the winding device 100, and can adopt a molded component to realize its function, which will not be described in detail here.

[0131] 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 winding device, characterized in that: include: A reel assembly is provided with a reel, the reel is configured to rotate and wind the pole piece tape, the axis of the reel is arranged along a first direction, the reel comprises a first reel and a second reel, the first reel and the second reel are arranged at intervals in a third direction; A cutting assembly is arranged upstream of the reel assembly and between the first reel and the second reel. The cutting assembly is configured to cut the pole piece strip. The cutting assembly comprises a moving mechanism and a cutting blade arranged on the moving mechanism. The moving mechanism drives the cutting blade to one end of the pole piece strip to be cut in the first direction and slides along the first direction for cutting. An adsorption assembly, comprising an adsorption chamber, the adsorption chamber being arranged on the moving mechanism, the adsorption chamber being provided with an adsorption surface, the adsorption surface being provided with adsorption holes, the adsorption holes being configured to negatively pressure adsorb the pole piece strip in the first direction; A pressure roller assembly, comprising a roller frame, an auxiliary roller wheel and a third driving element, wherein the roller frame is arranged on the moving mechanism, the roller frame is located between the second reel and the adsorption chamber in the third direction, the auxiliary roller wheel is arranged on the roller frame, the axis of the auxiliary roller wheel is parallel to the first direction, the third driving element is arranged on the roller frame and connected to the auxiliary roller wheel, and the third driving element is configured to drive the auxiliary roller wheel to rotate forward and reverse; The third direction intersects with the first direction.

2. The winding device according to claim 1, characterized in that: The moving mechanism comprises: A first moving mechanism is configured to drive the cutting blade to translate along a second direction to approach or move away from the pole piece strip to be cut; A second moving mechanism is arranged on the first moving mechanism, the cutting blade is arranged on the second moving mechanism, and the second moving mechanism is configured to drive the cutting blade to cut the pole piece strip to be cut along the first direction; The first direction intersects the second direction.

3. The winding device according to claim 2, characterized in that: The first moving mechanism comprises: The first frame includes a mounting portion, a guide portion and a limiting portion, wherein the guide portion is connected to the mounting portion and the limiting portion respectively, the guide portion is slidably matched with the second moving mechanism in the second direction, and the limiting portion is configured to limit the second moving mechanism in the second direction; The first driving element is connected between the mounting portion and the second moving mechanism, and is configured to drive the second moving mechanism to slide in the second direction.

4. The winding device according to claim 3, characterized in that: The limiting part is provided with an adjusting member, and the adjusting member comprises: An adjusting rod, threadedly connected to the limiting portion, wherein the axis of the adjusting rod is arranged parallel to the second direction; The locking piece is threadedly connected to the adjusting rod and abuts against the limiting portion.

5. The winding device according to claim 2, characterized in that: The second moving mechanism comprises: A second frame body, slidably matched with the first moving mechanism; A second driving element, disposed on the second frame, configured to provide rotational power; A driving wheel, rotatably disposed on the second frame and connected to the second driving element; A driven wheel rotatably disposed on the second frame; A flexible member, disposed on the driving wheel and the driven wheel, and in transmission cooperation with the driving wheel and the driven wheel; A knife seat, arranged on the flexible member, and the cutting blade is arranged on the knife seat; A guide member is disposed on the second frame and slidably cooperates with the knife holder. The guide member is configured to provide guidance for the knife holder in the first direction.

6. The winding device according to claim 5, characterized in that: The driving wheel and the driven wheel are both synchronous pulleys, the flexible member is a synchronous belt, the flexible member is meshed with the driving wheel and the driven wheel for transmission, and the guide member is a linear guide rail.

7. The winding device according to claim 5, characterized in that: The second moving mechanism further includes a positioning member, and the positioning member includes: A first positioning element, disposed on the second frame, configured to locate the initial position of the cutting edge; A second positioning element, disposed on the second frame, configured to position a cutting start end of the cutting blade; A third positioning element, disposed on the second frame, configured to position the cutting end of the cutting blade; A positioning reference component is disposed on the tool holder and is configured to provide a positioning reference for the first positioning element, the second positioning element, and the third positioning element.

8. The winding device according to claim 1, characterized in that: The adsorption assembly also includes: a pressure gauge connected to the adsorption chamber and configured to detect the gas pressure in the adsorption chamber; The solenoid valve is connected to the adsorption chamber and is configured to control the gas pressure in the adsorption chamber.

9. The winding device according to claim 8, characterized in that: The adsorption assembly further includes a baffle, and the baffle includes: A connecting portion configured to be adjustably disposed on the moving mechanism; The guide portion is connected to the connecting portion, and the guide portion is provided with a guide surface, and the guide surface is configured to guide the pole piece strip to smoothly transition to the adsorption surface.

10. The winding device according to claim 1, characterized in that: The adsorption chamber includes a first adsorption chamber and a second adsorption chamber, and the first adsorption chamber and the second adsorption chamber are respectively arranged on both sides of the cutting edge in the third direction.

11. The winding device according to claim 1, characterized in that: The winding device further comprises a translation assembly, the cutting assembly is arranged on the translation assembly, and the translation assembly is configured to drive the cutting assembly to translate in the third direction.

12. A pole piece rolling device, characterized in that: It comprises a winding device as described in any one of claims 1 to 11.

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