Winding device and battery processing apparatus

Abstract

Provided in the present application are a winding device (100) and a battery processing apparatus. The winding device (100) comprises: a cutting mechanism (20), which is used for cutting off a composite tape body (90); a plurality of winding needles (11), of which circumferential side surfaces are provided with slots (110) in the axial directions of the winding needles (11), clamping structures (112) used for clamping end parts of the composite tape body (90) being provided in the slots (110); a transfer mechanism (40), which is used for successively moving the plurality of winding needles (11) to the cutting mechanism (20); and a feeding mechanism (30), which is used for conveying the end parts of the composite tape body (90) into the slots (110). The composite tape body (90) is cut off to form two end parts, of which one is kept wound by the previous winding needle (11), and the other one can be clamped and fixed by the clamping structure (112) of the next winding needle (11), so that the composite tape body (90) is wound, saving time and improving efficiency.

Description

Winding device and battery processing equipment

[0001] The present application claims priority to the Chinese patent application No. 202420698422.X, filed on April 8, 2024 in the China Patent Office and entitled "Winding device and battery processing equipment", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application belongs to the technical field of battery manufacturing, and more particularly relates to a winding device and a battery processing equipment. BACKGROUND

[0003] The statements herein are provided only to enhance understanding of the present application and are not necessarily intended to constitute the prior art. An electrode assembly is an important component in a battery cell. A wound electrode assembly is generally formed by winding a composite tape body formed by stacking a positive electrode sheet, a separator, a negative electrode sheet, and a separator. When winding the electrode assembly, a winding needle is used. The winding needle generally includes two semicircular outer needles that clamp the end of the composite tape body and then wind it. However, this structure requires cutting the composite tape body after winding one electrode assembly, threading the end of the formed composite tape body through the gap between the two outer needles for winding, and then cutting the composite tape body for winding the next electrode assembly, which is inefficient.

[0004] SUMMARY

[0005] The present application aims to provide a winding device and a battery processing equipment to solve the problem of inefficient winding of an electrode assembly in the related art, which requires stopping each winding needle to thread the end of the composite tape body through the gap between the two outer needles.

[0006] In a first aspect, the present application provides a winding device, comprising:

[0007] a cutting mechanism configured to cut the composite tape body;

[0008] a plurality of winding needles, each winding needle having a groove formed in a circumferential side surface of the winding needle along an axial direction of the winding needle, and the groove being provided with a clamping structure configured to clamp an end of the composite tape body;

[0009] a transfer mechanism configured to sequentially move the plurality of winding needles to the cutting mechanism;

[0010] a feeding mechanism configured to feed the end of the composite tape body formed after being cut into the groove.

[0011] The technical scheme of the embodiment of the application comprises the following steps: a plurality of winding needles, a cutting mechanism and a feeding mechanism are arranged, and a clamping structure is arranged in the groove of the winding needle; when the previous winding needle is winding to manufacture an electrode assembly, the moving mechanism moves the next winding needle to the cutting mechanism, so that the cutting mechanism can cut the composite tape at the next winding needle after the previous winding needle winds the composite tape of a set length, and the previous winding needle can continue to wind to complete the winding of the electrode assembly; at the same time, the feeding mechanism can feed the end part cut by the cutting mechanism into the groove to be clamped and fixed by the clamping structure, so that the next winding needle can wind to manufacture an electrode assembly, thereby saving the time for the end part of the composite tape to pass through the winding needle, and even the cutting of the composite tape and the feeding of the end part cut by the cutting mechanism into the groove can be realized without stopping the rotation of the previous winding needle, thereby improving the efficiency of the winding and manufacturing of the electrode assembly.

[0012] In some embodiments, the feeding mechanism comprises a pushing structure for pushing the end part of the composite tape.

[0013] The pushing structure can actively push the end part of the composite tape into the groove of the winding needle, thereby better feeding the winding needle.

[0014] In some embodiments, the pushing structure comprises a push plate for pushing the end part of the composite tape.

[0015] The push plate can forcibly push the end part of the composite tape into the groove of the winding needle, thereby better feeding the winding needle, and the structure is simple and easy to manufacture.

[0016] In some embodiments, the push plate is provided with a first air blowing hole for blowing the end part of the composite tape into the groove.

[0017] The first air blowing hole arranged on the push plate can better blow the end part of the composite tape into the groove after the composite tape is cut, thereby improving the efficiency and keeping the end part of the composite tape flat, thereby improving the quality of the wound electrode assembly.

[0018] In some embodiments, the pushing structure comprises a carrier arranged outside the groove and used for aligning the groove, and the carrier is provided with a second air blowing hole for blowing the end part of the composite tape into the groove.

[0019] The carrier is arranged so that the second air blowing hole is arranged on the carrier, and the airflow output by the second air blowing hole blows the end part of the composite tape into the groove when the carrier aligns with the groove on the winding needle, thereby improving the efficiency and keeping the end part of the composite tape flat, thereby improving the quality of the wound electrode assembly.

[0020] In some embodiments, the feeding mechanism further comprises a feeding driving unit for driving the pushing structure to move towards the groove.

[0021] The feeding driving unit drives the pushing structure to move, so that the pushing structure pushes the end of the composite tape into the groove of the winding needle, improving the efficiency of feeding the winding needle.

[0022] In some embodiments, the feeding driving unit comprises a first rotary driving module for driving the pushing structure to rotate, and / or the feeding driving unit comprises a first linear driving module for driving the pushing structure to move linearly.

[0023] The first rotary driving module is arranged to drive the pushing structure to rotate, so that when the winding needle approaches the pushing structure, the pushing structure is turned to the groove of the winding needle, so as to push the end of the composite tape into the groove of the winding needle.

[0024] The first linear driving module is arranged to drive the pushing structure to move linearly, so that when the winding needle approaches the pushing structure, the pushing structure moves to the groove of the winding needle to push the end of the composite tape into the groove of the winding needle.

[0025] In some embodiments, the cutting mechanism comprises a cutting member for cutting the composite tape, and the cutting member is fixedly connected with the pushing structure.

[0026] The cutting member is arranged to cut the composite tape, and the cutting member is fixedly connected with the pushing structure to move synchronously with the pushing structure, so that the cutting member can cut the composite tape during the process that the pushing structure pushes the composite tape to the groove of the winding needle, or the cutting member is directly pushed into the groove of the winding needle by the pushing structure after cutting the composite tape, so as to improve the efficiency.

[0027] In some embodiments, the cutting member is a blade for cutting the composite tape, a heating rod for fusing the composite tape, or a heating wire for fusing the composite tape.

[0028] The cutting member uses a blade, which has a simple structure and low cost. The cutting member uses a heating rod or a heating wire, which can conveniently cut the composite tape and facilitate operation and control.

[0029] In some embodiments, the cutting mechanism further comprises a cutting driving unit for driving the cutting member to cut, and the feeding mechanism further comprises a feeding driving unit for driving the pushing structure to move towards the groove, and the feeding driving unit and the cutting driving unit are the same structure.

[0030] The feeding driving unit and the cutting driving unit use the same structure to drive the cutting member and the pushing structure to move synchronously and simplify the structure.

[0031] In some embodiments, the cutting mechanism comprises a cutting member for cutting the composite tape and a cutting driving unit for driving the cutting member to cut.

[0032] The cutting driving unit is arranged to drive the cutting member to move so that the cutting member moves to the composite tape body to cut the composite tape body.

[0033] In some embodiments, the cutting driving unit comprises a second rotary driving module for driving the cutting member to rotate, and / or the cutting driving unit comprises a second linear driving module for driving the cutting member to move linearly.

[0034] The second rotary driving module is arranged to drive the cutting member to rotate so that the cutting member rotates to the composite tape body to cut the composite tape body when the winding needle approaches the cutting member.

[0035] The second linear driving module is arranged to drive the cutting member to move linearly so that the cutting member moves to the composite tape body to cut the composite tape body when the winding needle approaches the cutting member.

[0036] In some embodiments, the inner wall of the groove is provided with air suction holes for sucking the end of the composite tape body into the groove.

[0037] The air suction holes are arranged on the inner wall of the groove, and after the cutting mechanism cuts the composite tape body, the air suction holes can directly suck the end of the composite tape body into the groove to realize feeding into the winding needle, which is efficient.

[0038] In some embodiments, the clamping structure comprises an air bag arranged in the groove.

[0039] The air bag is used to clamp the end of the composite tape body, which is simple in structure, fast in response, and efficient.

[0040] In some embodiments, the winding needle is provided with grooves on opposite sides.

[0041] The grooves are arranged on opposite sides of the winding needle, which not only can accommodate the end of the composite tape body, but also can use the grooves on both sides of the winding needle as discharge grooves to simplify the structure of the winding needle.

[0042] In some embodiments, the winding needle comprises a plurality of outer needles, and the grooves are formed between at least two outer needles.

[0043] A plurality of outer needles are arranged, and the grooves are formed between two outer needles, which is simple in structure and easy to manufacture.

[0044] In some embodiments, the winding needle is an integral structure.

[0045] The winding needle uses an integral structure, which is simple in structure and easy to process.

[0046] In some embodiments, the winding device further comprises a third rotary driving module for driving the winding needle to rotate, the third rotary driving module corresponds to the winding needle one-to-one, and the winding needle is installed on the corresponding third rotary driving module.

[0047] The third rotation driving module is arranged to drive the winding needle to rotate, so as to realize winding of the composite tape to form the electrode assembly.

[0048] In some embodiments, the transferring mechanism comprises a rotating disc and a fourth rotation driving module for driving the rotating disc to rotate, and each winding needle is mounted on the rotating disc.

[0049] The rotating disc is arranged to support each winding needle, and the fourth rotation driving module is arranged to drive the rotating disc to rotate, so as to drive the winding needle supported by the rotating disc to rotate, thereby facilitating winding of the winding needle to manufacture the electrode assembly.

[0050] In a second aspect, the embodiments of the present application provide a battery processing device comprising the winding device as described in the above embodiments.

[0051] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the embodiments can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or exemplary technical descriptions. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0053] Fig. 1 is a structural schematic diagram of an electrode assembly according to some embodiments of the present application;

[0054] Fig. 2 is a structural schematic diagram of a winding device according to some embodiments of the present application;

[0055] Fig. 3 is a structural schematic diagram of a winding process of the winding device in Fig. 2;

[0056] Fig. 4 is a structural schematic diagram of a winding mechanism according to some embodiments of the present application;

[0057] Fig. 5 is a side view structural schematic diagram of the winding mechanism in Fig. 4;

[0058] Fig. 6 is a left view structural schematic diagram of the winding mechanism in Fig. 5;

[0059] Fig. 7 is a structural schematic diagram of a connection between a push plate and a heating rod according to some embodiments of the present application;

[0060] Fig. 8 is a structural schematic diagram of a connection between a push plate and a heating wire according to some embodiments of the present application;

[0061] Fig. 9 is a structural schematic diagram of a connection between a push plate and a cutting member according to some embodiments of the present application;

[0062] Fig. 10 is a schematic view of a partial structure of a winding device according to some embodiments of the present application;

[0063] Fig. 11 is a schematic view of a bottom structure of the winding device of Fig. 10;

[0064] Fig. 12 is a schematic view of a structure of a winding process of a winding device according to some other embodiments of the present application;

[0065] Fig. 13 is a schematic view of a feeding mechanism and a cutting mechanism of the winding device of Fig. 12;

[0066] Fig. 14 is a schematic view of a structure of a winding process of a winding device according to some further embodiments of the present application;

[0067] Fig. 15 is a schematic view of a feeding mechanism and a cutting mechanism of the winding device of Fig. 14;

[0068] Fig. 16 is a schematic view of a structure of a winding process of a winding device according to some other embodiments of the present application;

[0069] Fig. 17 is a schematic view of a winding needle of Fig. 16;

[0070] Fig. 18 is a schematic view of a winding needle according to some further embodiments of the present application.

[0071] In the drawings, like reference numerals refer to like parts throughout the various views. Specifically, 100 denotes a winding device; 10 denotes a winding mechanism; 11 denotes a winding needle; 110 denotes a groove; 111 denotes an outer needle; 112 denotes a clamping structure; 1121 denotes an air bag; 1122 denotes a clamping cylinder; 12 denotes a third rotary driving module; 20 denotes a cutting mechanism; 21 denotes a cutting member; 211 denotes a heating rod; 212 denotes a heating wire; 213 denotes a blade; 22 denotes a cutting driving unit; 221 denotes a second rotary driving module; 222 denotes a second linear driving module; 23 denotes a support member; 30 denotes a feeding mechanism; 31 denotes a pushing structure; 311 denotes a pushing plate; 312 denotes a first blowing hole; 313 denotes a bearing member; 314 denotes a second blowing hole; 32 denotes a suction hole; 33 denotes a feeding driving unit; 331 denotes a first rotary driving module; 3311 denotes a support shaft; 3312 denotes a second motor; 3313 denotes a gear set; 332 denotes a first linear driving module; 3321 denotes a base plate; 3322 denotes a slide rail; 3323 denotes a slide plate; 3324 denotes a screw-nut mechanism; 3325 denotes a first motor; 34 denotes a mounting member; 40 denotes a transferring mechanism; 41 denotes a rotating disc; 42 denotes a fourth rotary driving module; 900 denotes an electrode assembly; 90 denotes a composite belt body; 91 denotes a pole piece; 911 denotes a first pole piece; 912 denotes a second pole piece; 92 denotes a diaphragm.

[0072] Embodiments of the present application

[0073] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present application and are not intended to limit the present application.

[0074] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the present specification and claims and the aforementioned description of the drawings are not intended to be all inclusive in terms of encompassing the full scope of the present application.

[0075] 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. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0076] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined in any suitable manner with other embodiments.

[0077] 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, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0078] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces). The meaning of "several" is one or more, unless otherwise explicitly specified.

[0079] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the 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 devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0080] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0081] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0082] The linear drive module referred to in the embodiments of the present application refers to a device, assembly, module or mechanism capable of driving a structural member to move linearly. The linear drive module can be a linear module, a screw nut mechanism, a gear and rack mechanism, an air cylinder, a hydraulic cylinder, etc. When the linear drive module is referred to in the embodiments of the present application, it can be any one of a linear module, a screw nut mechanism, a gear and rack mechanism, an air cylinder, a hydraulic cylinder, and can be set and used as needed. The linear module referred to in the embodiments of the present application is also called a linear module, a linear slide, etc. The linear modules currently widely used can be divided into: synchronous belt type, ball screw type, linear motor type. When the linear drive module adopts a linear module, any one of a synchronous belt type linear module, a ball screw type linear module, a linear motor type linear module can be adopted, and can be set and used as needed.

[0083] The synchronous belt type linear module mainly includes a belt, a linear guide rail, a coupling, a motor and the like. The working principle of the synchronous belt type is that the belt is installed on the transmission shafts on both sides of the linear module, one of the transmission shafts is connected with the motor as a power input shaft; a slider for connecting a workpiece of equipment is fixed on the belt, when the transmission shaft rotates, the belt is driven to move, and then the slider is driven to move linearly.

[0084] The ball screw type linear module mainly includes a ball screw, a linear guide rail, a ball screw support seat, a motor and the like.

[0085] The ball screw is a product for converting rotary motion into linear motion or converting linear motion into rotary motion. The ball screw mainly includes a screw rod and a nut. The screw rod refers to a rod-shaped structural member provided with an external thread. The nut refers to a structural member provided with an internal thread. The external thread of the screw rod is matched with the internal thread of the nut to realize that the nut is installed on the screw rod, and through the rotation of the screw rod, the nut moves on the screw rod to realize the conversion of rotary motion into linear motion. The workpiece of the equipment is connected with the nut, when the nut moves linearly, the workpiece of the equipment can be driven to move linearly. Some ball screws also include balls, which mainly reduce the frictional resistance between the nut and the screw rod.

[0086] The linear guide rail is also called slide rail, linear guide rail or linear slide rail, which is used for linear reciprocating motion occasions and can bear a certain torque to realize high-precision linear motion under high load.

[0087] The linear motor module, also simply referred to as linear motor, is a transmission device for directly converting electric energy into linear mechanical energy without any intermediate conversion mechanism.

[0088] The screw nut mechanism mainly includes a screw rod, a nut and a motor, the nut is installed on the screw rod, the screw rod is connected with the motor, the screw rod is driven to rotate by the motor to push the nut to move on the screw rod to realize the linear movement of the nut. The workpiece of the equipment is connected with the nut, when the nut moves linearly, the workpiece of the equipment can be driven to move linearly.

[0089] The gear and rack mechanism mainly includes a gear, a rack and a motor, the gear is engaged with the rack, the gear is connected with the motor, the gear is driven to rotate by the motor to push the rack to move linearly. The workpiece of the equipment is connected with the rack, when the rack moves linearly, the workpiece of the equipment can be driven to move linearly. The rack refers to a component with multiple teeth distributed equidistantly along the length direction. The gear refers to a wheel-shaped component with multiple teeth distributed equidistantly on the outer periphery.

[0090] The cylinder refers to a machine part that guides the piston to move linearly in the cylinder. The cylinder mainly includes a cylinder barrel, an end cover, a piston, a piston rod, and a sealing member, etc. The end cover is covered on the end of the cylinder barrel, the piston rod is connected with the piston, the piston is slidingly installed in the cylinder barrel, the piston rod extends out of the cylinder barrel through the end cover, and the sealing member seals between the piston rod and the end cover. The cylinder mainly fills high-pressure gas into the cylinder barrel on one side of the piston to push the piston to move linearly in the cylinder, and then pushes the piston rod to move linearly along the cylinder. The equipment workpiece is connected with the piston rod, and when the piston rod moves linearly, the equipment workpiece can be driven to move linearly.

[0091] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and is used for linear reciprocating motion (or oscillating motion). The hydraulic cylinder generally includes a cylinder barrel, a cylinder cover, a piston, a piston rod, and a sealing device. The cylinder cover is covered on the end of the cylinder barrel, the piston rod is connected with the piston, the piston is slidingly installed in the cylinder barrel, the piston rod extends out of the cylinder barrel through the cylinder cover, and the sealing member seals between the piston rod and the end cover. The cylinder mainly fills high-pressure liquid into the cylinder barrel on one side of the piston to push the piston to move linearly in the cylinder, and then pushes the piston rod to move linearly along the cylinder. The equipment workpiece is connected with the piston rod, and when the piston rod moves linearly, the equipment workpiece can be driven to move linearly.

[0092] The rotary drive module refers to a device, component, module or mechanism that can output rotary power to drive the structure to rotate. The rotary drive module usually includes a motor, a rotary cylinder, a rotary hydraulic cylinder and the like. The rotary drive module mentioned in the embodiments of the present application can be any one of a motor, a rotary cylinder and a rotary hydraulic cylinder, or a structure including any one of a motor, a rotary cylinder and a rotary hydraulic cylinder for outputting rotary power, which can be set and used as needed.

[0093] The battery cell in the embodiments of the present application includes but is not limited to a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium-sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell or a magnesium ion battery cell, etc. The shape of the battery cell includes but is not limited to a cylindrical shape, a flat shape, a cuboid shape or other shapes, etc. The battery cell is generally packaged, including but not limited to: cylindrical battery cells, square battery cells and soft package battery cells.

[0094] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application can include a battery module or a battery pack, etc. The battery generally includes a box for packaging one or more battery cells. The box can avoid the influence of liquid or other foreign matters on the charging or discharging of the battery cell to some extent. In some cases, the battery cell can also be used directly, i.e., the battery can also not include a box, which is not limited here.

[0095] The battery cell in the embodiments of the present application comprises an electrode assembly and a shell, the electrode assembly is installed in the shell to protect the electrode assembly by the shell.

[0096] The electrode assembly, also known as an electrode core, is a component for storing and releasing electric energy, and is composed of a positive electrode sheet, a negative electrode sheet and a separator. The electrode assembly mainly works by moving metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet comprises a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, the part of the positive electrode current collector which is not coated with the positive electrode active material layer protrudes from the part which is coated with the positive electrode active material layer, and the part which is not coated with the positive electrode active material layer serves as a positive electrode tab, or a metal conductor is welded on the positive electrode current collector and led out to serve as the positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode current collector, the part of the negative electrode current collector which is not coated with the negative electrode active material layer protrudes from the part which is coated with the negative electrode active material layer, and the part which is not coated with the negative electrode active material layer serves as a negative electrode tab, or a metal conductor is welded on the negative electrode current collector and led out to serve as the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP (Polypropylene) or PE (Polyethylene), etc. The separator is an insulating film arranged between the positive electrode sheet and the negative electrode sheet, and its main function is to isolate the positive electrode and the negative electrode and prevent the electrons in the battery from freely passing through to prevent short circuit, while allowing the ions in the electrolyte to freely pass between the positive electrode and the negative electrode to form a loop between the positive electrode and the negative electrode. The positive electrode sheet and the negative electrode sheet are collectively referred to as electrode sheets. The positive electrode tab and the negative electrode tab are collectively referred to as electrode tabs. Thus, the structure of the wound electrode assembly is arranged and stacked in the order of positive electrode sheet-separator-negative electrode sheet-separator to form a composite strip, and then wound into a shape. The length of the separator of the electrode assembly is often longer than the length of the electrode sheet, so that the two ends of the separator protrude from the electrode sheet, i.e. the two ends of the composite strip of the electrode assembly are both separators, and the winding starting end and the winding ending end of the wound electrode assembly are both separators, so as to better separate the positive electrode sheet and the negative electrode sheet and improve safety.

[0097] The electrode assembly is wound by using a winding needle. The winding needle comprises two outer needles, the end of the composite strip is clamped by the two outer needles, then the outer needles are rotated to wind the composite strip on the outer needles, after winding to a certain length, the composite strip is cut off, and then the electrode assembly on the outer needles is taken off for subsequent processing steps. This structure requires that the end of the composite strip pass through the gap between the two outer needles before each electrode assembly is wound, so that the end of the composite strip can be clamped by the outer needles, and then the winding needle can be rotated for winding. The auxiliary time is long and the efficiency is low.

[0098] In view of the above, in order to solve the problem that the end of the composite tape needs to be passed through the gap between the outer needles to be clamped by the outer needles during the winding manufacturing process of the electrode assembly, the embodiments of the present application provide a winding device. By arranging a plurality of winding needles, a cutting mechanism and a feeding mechanism, and arranging a clamping structure in the groove of the winding needle, after winding the electrode assembly on one winding needle, the composite tape is cut by the cutting mechanism to form two ends, one end is continuously wound by the previous winding needle, and the other end is transported to the groove by the feeding mechanism to be clamped and fixed by the clamping structure, so as to wind the composite tape by the next winding needle. Since the composite tape is cut and directly transported to the groove of the winding needle by the feeding mechanism to be clamped by the clamping structure, the time is shorter, and the efficiency is improved.

[0099] The winding device provided by the embodiments of the present application can wind to form cylindrical electrode assemblies, flat electrode assemblies, prismatic electrode assemblies or electrode assemblies of other shapes. The electrode assemblies formed by the winding device can be used as components for electrochemical reactions in battery monomers, which can be used in electric devices using batteries as power sources or various energy storage systems using batteries as energy storage elements. The electric devices can be, but are not limited to, mobile phones, tablets, notebook computers, electric toys, electric tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, the electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric plane toys, etc., and the spacecraft can include airplanes, rockets, space shuttles and spaceships, etc.

[0100] The following embodiments are described by taking a winding device of some embodiments of the present application for forming flat electrode assemblies as an example for convenience of description.

[0101] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of an electrode assembly 900 provided by some embodiments of the present application. The electrode assembly 900 is a component for electrochemical reactions in a battery monomer. The battery monomer can contain one, two or more electrode assemblies 900. The electrode assembly 900 is mainly wound by a first electrode sheet 911, a second electrode sheet 912 and a separator 92, and the separator 92 is usually arranged between the first electrode sheet 911 and the second electrode sheet 912 to insulate and separate the first electrode sheet 911 and the second electrode sheet 912. The first electrode sheet 911 and the second electrode sheet 912 have different polarities, for example, the first electrode sheet 911 can be a positive electrode sheet, and the second electrode sheet 912 is a negative electrode sheet; of course, the first electrode sheet 911 can also be a negative electrode sheet, and the second electrode sheet 912 is a positive electrode sheet.

[0102] Referring to FIGS. 2-6, according to some embodiments of the present application, a winding device 100 is provided, which includes a plurality of winding needles 11, a cutting mechanism 20, a moving mechanism 40, and a feeding mechanism 30. Each winding needle 11 has a groove 110 formed in the circumferential side thereof along the axial direction, and the groove 110 is provided with a clamping structure 112 for clamping the end of the composite strip 90. The cutting mechanism 20 is used to cut the composite strip 90; the moving mechanism 40 is used to move the plurality of winding needles 11 to the cutting mechanism 20 in sequence; and the feeding mechanism 30 is used to feed the end of the composite strip 90 into the groove 110.

[0103] Referring to FIG. 4, the length direction of the winding needle 11 is the axial direction of the winding needle 11, as indicated by the arrow X in the figure. The radial direction of the winding needle 11 is the direction perpendicular to the axial direction X of the winding needle 11.

[0104] The composite strip 90 refers to the strip used to make the electrode assembly 900. Since the electrode assembly 900 is made by winding the positive electrode sheet, the separator 92, the negative electrode sheet, and the separator 92 in layers, the composite strip 90 refers to the strip structure formed by the positive electrode sheet, the separator 92, the negative electrode sheet, and the separator 92 in layers. It can be that the positive electrode sheet, the separator 92, the negative electrode sheet, and the separator 92 are first layered to form a composite strip 90 with a relatively long length, and then the winding needle 11 is used to make the electrode assembly 900. As shown in FIG. 1, the first electrode sheet 911, the separator 92, the second electrode sheet 912, and the separator 92 are layered to form the composite strip 90. Of course, the positive electrode sheet, the separator 92, the negative electrode sheet, and the separator 92 can also be directly fed to the winding needle 11, layered to form the composite strip 90 at the winding needle 11, and then wound on the winding needle 11. It can also be that the positive electrode sheet and one separator 92 are layered to form a positive electrode intermediate strip, and the negative electrode sheet and another separator 92 are layered to form a negative electrode intermediate strip, and then the positive electrode intermediate strip and the negative electrode intermediate strip are fed to the winding needle 11. The positive electrode intermediate strip and the negative electrode intermediate strip can be layered to form the composite strip 90 at a position away from the winding needle 11 and then wound on the winding needle 11, or can be layered to form the composite strip 90 at the winding needle 11 and then wound on the winding needle 11.

[0105] The winding needle 11 refers to a long rod-shaped structure used to wind the composite strip 90 to form the wound electrode assembly 900. The winding needle 11 is usually designed to be cylindrical or a specific shape (for example, a square winding needle 11 corresponding to a square battery). The winding needle 11 can be made of metal, plastic, etc., such as epoxy board, plastic, carbon steel, manganese steel, alloy steel, tool steel, high-speed steel, etc. The axial direction X of the winding needle 11 is also the length direction of the winding needle 11, as indicated by the arrow X in FIGS. 4 and 5. The radial direction of the winding needle 11 is the direction perpendicular to the axial direction X of the winding needle 11.

[0106] The groove 110 refers to a groove-shaped structure arranged on the circumferential surface of the winding needle 11. The groove 110 is arranged along the axial direction X of the winding needle 11. Since the winding needle 11 winds the composite tape 90, the composite tape 90 is wound on the circumferential surface of the winding needle 11. At the beginning of winding, the end of the composite tape 90 needs to extend into the groove 110 to be fixed by the clamping structure 112 in the groove 110. Therefore, the groove 110 extends along the axial direction X of the winding needle 11, which can facilitate the end of the composite tape 90 to extend into the groove 110 and make the end of the composite tape 90 more flat in the groove 110, so that the diaphragm 92 and the pole piece 91 in the electrode assembly 900 formed by winding are also more flat, thereby improving the quality of the electrode assembly 900.

[0107] The clamping structure 112 refers to a structure for fixing the end of the composite tape 90 in the groove 110. The clamping structure 112 can be a structure for clamping and fixing the end of the composite tape 90 alone, or can be a structure for clamping and fixing the end of the composite tape 90 in cooperation with other structures. For example, the clamping structure 112 can abut the end of the composite tape 90 against the side wall of the groove 110 to fix the end of the composite tape 90.

[0108] The cutting mechanism 20 refers to a structure for cutting and separating the composite tape 90. Since each electrode assembly 900 is wound with a set length of the composite tape 90, when the electrode assembly 900 is wound with a set length of the composite tape 90, the composite tape 90 needs to be cut. This not only facilitates the winding of the previous electrode assembly 900 to be completed, but also allows the winding of the next electrode assembly 900 to be started. The cutting mechanism 20 can be a mechanical structure for shearing and cutting, such as a structure including a blade, scissors, etc. to cut the composite tape 90. Of course, the cutting mechanism 20 can be a structure for hot melting and cutting, such as a structure including a heating wire, a heating rod, a laser, etc. to melt and cut the composite tape 90 by heat energy.

[0109] The transfer mechanism 40 refers to a mechanism for moving a plurality of winding needles 11 so that the winding needles 11 pass through the cutting mechanism 20 in turn. By arranging a plurality of winding needles 11 and the transfer mechanism 40, at the end of the winding of the previous winding needle 11 to manufacture the electrode assembly 900, the next winding needle 11 can be moved to the cutting mechanism 20 so that the cutting mechanism 20 cuts the composite tape 90. In this way, the previous winding needle 11 can continue to wind to complete the winding, and the next winding needle 11 can be fed with the composite tape 90 by the feeding mechanism 30. After feeding, the winding needle 11 can be moved away from the cutting mechanism 20, so that the winding needle 11 winds the composite tape 90, thereby improving the efficiency of manufacturing the electrode assembly 900.

[0110] Since the end of the composite tape 90 needs to be fixed by the winding needle 11 to be well wound, and the cutting mechanism 20 will form two ends after cutting the composite tape 90, one end will be collected on the winding needle 11 with the winding of the winding needle 11, and the other end needs to be fixed by the next winding needle 11 to be wound by the winding needle 11. Therefore, the end of the composite tape 90 specifically refers to the end of the composite tape 90 that needs to be sent to the groove 110 of the winding needle 11 to be fixed by the clamping structure 112.

[0111] The feeding mechanism 30 refers to a structure for feeding the end of the composite tape 90 into the groove 110. The feeding mechanism 30 is arranged to feed the end of the composite tape 90 into the groove 110 on the winding needle 11 to feed the winding needle 11, which can improve the efficiency of feeding. In particular, through the cooperation of the feeding mechanism 30, the cutting mechanism 20, the moving mechanism 40 and the plurality of winding needles 11, after the winding needle 11 winds the composite tape 90 to a certain length, the cutting mechanism 20 cuts the composite tape 90, so that the winding needle 11 can directly wind the end without stopping; at the same time, the feeding mechanism 30 feeds the end of the composite tape 90 into the groove 110 of the next winding needle 11 to be fixed by the clamping structure 112, the moving mechanism 40 moves the next winding needle 11 away from the cutting mechanism 20, so that the next winding needle 11 winds the composite tape 90, and the moving mechanism 40 moves the new winding needle 11 to the cutting mechanism 20 to wait for feeding after the cutting mechanism 20 cuts the composite tape 90. Thus, the continuous production of the electrode assembly 900 can be realized, and the efficiency of winding production of the electrode assembly 900 is improved.

[0112] In the technical scheme of the embodiment of the application, a plurality of winding needles 11, a cutting mechanism 20 and a feeding mechanism 30 are arranged, and a clamping structure 112 is arranged in the groove 110 of the winding needle 11. After the winding needle 11 winds the electrode assembly 900, the moving mechanism 40 can move the next winding needle 11 to the cutting mechanism 20, so that after the winding needle 11 winds the composite tape 90 to a certain length, the cutting mechanism 20 can directly cut the composite tape 90 at the next winding needle 11 to make the winding needle 11 continue to wind and complete the winding of the electrode assembly 900. At the same time, the feeding mechanism 30 can feed the end of the composite tape 90 cut by the cutting mechanism 20 into the groove 110 to be clamped and fixed by the clamping structure 112, so that the next winding needle 11 can wind to produce the electrode assembly 900, thereby saving the time of passing the end of the composite tape 90 through the winding needle 11, and even realizing the cutting of the composite tape 90 and the feeding of the end of the composite tape 90 into the groove 110 without stopping the rotation of the winding needle 11, thereby improving the efficiency of winding production of the electrode assembly 900.

[0113] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 16, in some embodiments, the cutting mechanism 20 includes a cutting member 21, which refers to a structural member used to cut the composite strip 90. The cutting member 21 is arranged to cut the composite strip 90.

[0114] In some embodiments, the cutting member 21 is a blade 213 used to cut the composite strip 90, a heating rod 211 used to melt the composite strip 90, or a heating wire 212 used to melt the composite strip 90.

[0115] Please refer to FIG. 16, the blade 213 refers to a thin and sharp piece used for cutting or scraping, which can be a metal piece, a ceramic piece, a hard plastic piece, etc.

[0116] The cutting member 21 uses the blade 213, which is simple in structure and low in cost.

[0117] Please refer to FIG. 7, the heating rod 211 refers to a long rod-shaped electric heating device used for heating. The working principle of the heating rod 211 is to convert electrical energy into heat energy. Generally, it is internally provided with a resistance wire or other conductive material that generates heat when an electric current passes through.

[0118] Using the heating rod 211, the structure is simple, and the composite strip 90 can be conveniently melted.

[0119] Please refer to FIG. 8 and FIG. 9, the heating wire 212, also known as an electric heating wire or a heating wire, is usually a wire-shaped electric heating device made of iron-chromium-aluminum, nickel-chromium, etc. When an electric current passes through, it generates heat to convert electrical energy into heat energy, thereby heating.

[0120] Using the heating wire 212, the structure is simple, the occupied volume is small, and the composite strip 90 can be conveniently melted.

[0121] In order to better wind the pole piece 91 and improve the insulation and isolation effect between the positive pole piece and the negative pole piece, the length of the separator 92 in each electrode assembly 900 is often longer than the length of the pole piece 91, so that the two ends of the separator 92 protrude out of the pole piece 91, which makes the entire length of the composite strip 90 have the separator 92, and the pole pieces 91 are arranged at intervals on the separator 92. Cutting is to cut the separator 92 between the two pole pieces 91, so that the starting and ending parts of winding are the separator 92. Using the heating rod 211 or the heating wire 212 to melt the composite strip 90 is actually using the heating rod 211 or the heating wire 212 to melt the separator 92, which is efficient and can also heat and melt the two layers of the separator 92 of the composite strip 90 together, reducing the risk of folding the separator 92 and improving the quality of manufacturing the electrode assembly 900.

[0122] Please refer to FIG. 2 to FIG. 15, in some embodiments, the feeding mechanism 30 includes a pushing structure 31 used to push the end of the composite strip 90.

[0123] The pushing structure 31 is a structure capable of actively pushing the end of the composite tape 90 into the groove 110.

[0124] Using the pushing structure 31, the end of the composite tape 90 can be actively pushed into the groove 110 of the winder 11 to better load the winder 11.

[0125] Referring to FIGS. 2-9, in some embodiments, the pushing structure 31 includes a push plate 311 for pushing the end of the composite tape 90.

[0126] The push plate 311 refers to a plate-like, strip-like or sheet-like piece for pushing the end of the composite tape 90. The push plate 311 enters and exits the groove 110 of the winder 11 to push the end of the composite tape 90 into the groove 110 of the winder 11, which is simple in structure and convenient to push.

[0127] Using the push plate 311, the end of the composite tape 90 can be forced into the groove 110 of the winder 11 to better load the winder 11, and the structure is simple and easy to manufacture.

[0128] Referring to FIGS. 3 and 9, in some embodiments, the push plate 311 is provided with a first air blowing hole 312 for blowing the end of the composite tape 90 into the groove 110.

[0129] The first air blowing hole 312 refers to a hole structure that can blow air outward. By providing the first air blowing hole 312 on the push plate 311, the push plate 311 pushes the end of the composite tape 90 into the groove 110 of the winder 11, and the first air blowing hole 312 blows the end of the composite tape 90, which not only can blow the end of the composite tape 90 flat to reduce the risk of folding the end of the composite tape 90, but also facilitates blowing the end of the composite tape 90 to the clamping structure 112 for clamping and fixing by the clamping structure 112.

[0130] By providing the first air blowing hole 312 on the push plate 311, after the composite tape 90 is cut, the end of the composite tape 90 can be better blown into the groove 110, the efficiency is improved, and the end of the composite tape 90 is kept flat to improve the quality of the wound electrode assembly 900.

[0131] In some embodiments, the pushing structure 31 includes a carrier 313 disposed outside the groove 110 of the winder 11 and used for aligning the groove 110, and the carrier 313 is provided with a second air blowing hole 314 for blowing the end of the composite tape 90 into the groove 110.

[0132] The carrier 313 refers to a structure that can be used to set the second blowing hole 314, and the carrier 313 can be a rib, a plate, a rod, etc. The second blowing hole 314 is set on the carrier 313, and the direction of the second blowing hole 314 can be adjusted through the carrier 313.

[0133] The carrier 313 is located outside the groove 110 of the winding needle 11, that is, the carrier 313 does not extend into the interior of the groove 110. This not only facilitates the passage of the composite tape 90 between the carrier 313 and the winding needle 11 to facilitate the winding of the composite tape 90 and reduce the resistance of the carrier 313 to the movement of the composite tape 90, but also allows the airflow blown out by the second blowing hole 314 to be directly blown into the groove 110 after the composite tape 90 is cut off.

[0134] After the cutting member 21 cuts off the composite tape 90, the second blowing hole 314 can directly blow the end of the composite tape 90 into the groove 110 of the winding needle 11, and the structure is simple and efficient. Moreover, the second blowing hole 314 blows the end of the composite tape 90, which not only flattens the end of the composite tape 90 and reduces the risk of folding the end of the composite tape 90, but also facilitates blowing the end of the composite tape 90 to the clamping structure 112 for clamping and fixing.

[0135] The carrier 313 is provided to set the second blowing hole 314 on the carrier 313, and the airflow output by the second blowing hole 314 blows the end of the composite tape 90 into the groove 110 when the carrier 313 is aligned with the groove 110 on the winding needle 11, thereby improving efficiency and keeping the end of the composite tape 90 flat to improve the quality of the wound electrode assembly 900.

[0136] Referring to FIGS. 2, 3, 10, and 11, in some embodiments, the feeding mechanism 30 further includes a feeding driving unit 33 for driving the pushing structure 31 to move toward the groove 110.

[0137] The feeding driving unit 33 refers to a power device for driving the pushing structure 31 to move toward the groove 110 of the winding needle 11.

[0138] The feeding driving unit 33 is provided to drive the pushing structure 31 to move, so that the pushing structure 31 pushes the end of the composite tape 90 into the groove 110 of the winding needle 11, thereby improving the efficiency of feeding the winding needle 11.

[0139] In some embodiments, when the pushing structure 31 includes a push plate 311, the feeding driving unit 33 drives the push plate 311 to enter and exit the groove 110 of the winding needle 11 to push the end of the composite tape 90 into the groove 110 to achieve feeding.

[0140] In some embodiments, when the pushing structure 31 comprises the carrier 313, the feeding driving unit 33 drives the carrier 313 to move, so that the second blowing hole 314 faces the groove 110, and the end of the composite tape 90 is blown into the groove 110, thereby achieving feeding.

[0141] In some embodiments, the feeding driving unit 33 comprises a first rotary driving module 331 for driving the pushing structure 31 to rotate.

[0142] The first rotary driving module 331 refers to a rotary driving module for driving the pushing structure 31 to rotate. The transfer mechanism 40 moves the winding needle 11 to be adjacent to the cutting mechanism 20, and the first rotary driving module 331 drives the pushing structure 31 to rotate, so that the pushing structure 31 rotates towards the groove 110 of the winding needle 11, so that the pushing structure 31 pushes the end of the composite tape 90 into the groove 110, so that the clamping structure 112 is fixed, and the structure is simple.

[0143] The first rotary driving module 331 is arranged to drive the pushing structure 31 to rotate, so that when the winding needle 11 is close to the pushing structure 31, the pushing structure 31 is turned to the groove 110 of the winding needle 11, so that the end of the composite tape 90 is pushed into the groove 110 of the winding needle 11.

[0144] In some embodiments, when the pushing structure 31 comprises the pushing plate 311, the transfer mechanism 40 moves the winding needle 11 to be adjacent to the cutting mechanism 20, and the first rotary driving module 331 drives the pushing plate 311 to rotate, so that the pushing plate 311 rotates into the groove 110 of the winding needle 11, so that the pushing plate 311 pushes the end of the composite tape 90 into the groove 110, so that the clamping structure 112 is fixed, and the structure is simple.

[0145] In some embodiments, when the pushing structure 31 comprises the carrier 313, the first rotary driving module 331 drives the carrier 313 to rotate, so that the second blowing hole 314 faces the groove 110, and the end of the composite tape 90 is blown into the groove 110, thereby achieving feeding.

[0146] In some embodiments, the feeding driving unit 33 comprises a first linear driving module 332 for driving the pushing structure 31 to move linearly.

[0147] The first linear driving module 332 refers to a linear driving module for driving the pushing structure 31 to move linearly. The transfer mechanism 40 moves the winding needle 11 to be adjacent to the cutting mechanism 20, and the first linear driving module 332 drives the pushing structure 31 to move towards the groove 110 of the winding needle 11, so that the pushing structure 31 can more smoothly push the end of the composite tape 90 into the groove 110, so that the clamping structure 112 is fixed, and the structure is simple.

[0148] The first linear driving module 332 is arranged to drive the pushing structure 31 to move linearly, so that when the winding needle 11 approaches the pushing structure 31, the pushing structure 31 moves to the groove 110 of the winding needle 11 to push the end of the composite tape 90 into the groove 110 of the winding needle 11.

[0149] In some embodiments, when the pushing structure 31 includes the pushing plate 311, the transfer mechanism 40 moves the winding needle 11 to the position adjacent to the cutting mechanism 20, and the first linear driving module 332 drives the pushing plate 311 to move towards the groove 110 of the winding needle 11, so that the pushing plate 311 pushes the end of the composite tape 90 into the groove 110, so that the clamping structure 112 is fixed, and the structure is simple.

[0150] In some embodiments, when the pushing structure 31 includes the carrier 313, the first linear driving module 332 drives the carrier 313 to move, so that the second air blowing hole 314 moves towards the groove 110 to blow the end of the composite tape 90 into the groove 110, thereby achieving feeding.

[0151] In some embodiments, the feeding mechanism 30 further includes a mounting member 34, and the pushing structure 31 is fixed to the mounting member 34, and the pushing structure 31 is supported by the mounting member 34. The mounting member 34 is connected with the feeding driving unit 33, so that the pushing structure 31 is connected with the feeding driving unit 33. Of course, the pushing structure 31 can also be directly connected with the feeding driving unit 33.

[0152] In some embodiments, when the pushing structure 31 includes the pushing plate 311, the mounting member 34 and the pushing plate 311 can be an integral structure, so as to facilitate processing and manufacturing, and improve the connection strength between the pushing plate 311 and the mounting member 34. Of course, the mounting member 34 and the pushing plate 311 can also be manufactured separately and then connected and fixed.

[0153] In some embodiments, when the pushing structure 31 includes the carrier 313, the mounting member 34 and the carrier 313 can be an integral structure, so as to facilitate processing and manufacturing, and improve the connection strength between the carrier 313 and the mounting member 34. Of course, the mounting member 34 and the carrier 313 can also be manufactured separately and then connected and fixed.

[0154] In some embodiments, the second air blowing hole 314 can also be directly arranged on the mounting member 34 to deliver the end of the composite tape 90 into the groove 110 of the winding needle 11.

[0155] In some embodiments, when the feeding driving unit 33 includes the first rotary driving module 331, the mounting member 34 can be connected with the first rotary driving module 331.

[0156] In some embodiments, when the feeding driving unit 33 comprises the first linear driving module 332, the mounting member 34 can be connected with the first linear driving module 332.

[0157] In some embodiments, when the feeding driving unit 33 comprises the first linear driving module 332, the mounting member 34 can be connected with the first linear driving module 332.

[0158] In the above embodiments, when the feeding mechanism 30 comprises the mounting member 34, the mounting member 34 is connected with the first linear driving module 332.

[0159] In some embodiments, when the feeding driving unit 33 comprises the first linear driving module 332, the mounting member 34 can be connected with the first linear driving module 332.

[0160] In the above embodiments, when the feeding mechanism 30 comprises the mounting member 34, the mounting member 34 is connected with the first linear driving module 332.

[0161] Please refer to FIG. 9, FIG. 13 and FIG. 15, in some embodiments, the cutting mechanism 20 comprises a cutting member 21 for cutting the composite tape 90, and the cutting member 21 is fixedly connected with the pushing structure 31.

[0162] The cutting member 21 is fixedly connected with the pushing structure 31, which means that the cutting member 21 is relatively fixed with the pushing structure 31. For example, the cutting member 21 can be directly connected with the pushing structure 31, or the cutting member 21 can be indirectly connected with the pushing structure 31.

[0163] The cutting member 21 is arranged to cut the composite tape 90. The cutting member 21 is fixedly connected with the pushing structure 31, so that the cutting member 21 moves synchronously with the pushing structure 31. In the process that the pushing structure 31 pushes the composite tape 90 to the groove 110 on the winding needle 11, the cutting member 21 can cut the composite tape 90. Or, after the cutting member 21 cuts the composite tape 90, the cutting member 21 is directly pushed into the groove 110 on the winding needle 11 by the pushing structure 31, so as to improve the efficiency.

[0164] In some embodiments, the pushing structure 31 includes the push plate 311. In this case, the cutting member 21 can be arranged on the push plate 311.

[0165] The cutting member 21 is arranged on the push plate 311, that is, the cutting member 21 is supported by the push plate 311. For example, the cutting member 21 is a blade 213, a heating wire 212 or a heating rod 211 arranged on the push plate 311. In the process that the push plate 311 pushes the composite tape 90, the cutting member 21 can cut the composite tape 90. Or, after the cutting member 21 cuts the composite tape 90, the cutting member 21 is directly pushed into the groove 110 on the winding needle 11 by the push plate 311, so as to improve the efficiency.

[0166] The cutting member 21 is arranged on the push plate 311, that is, the cutting member 21 is supported by the push plate 311. For example, the cutting member 21 is a blade 213, a heating wire 212 or a heating rod 211 arranged on the push plate 311. In the process that the push plate 311 pushes the composite tape 90, the cutting member 21 can cut the composite tape 90. Or, after the cutting member 21 cuts the composite tape 90, the cutting member 21 is directly pushed into the groove 110 on the winding needle 11 by the push plate 311, so as to improve the efficiency.

[0167] In some embodiments, the pushing structure 31 includes the bearing member 313. In this case, the cutting member 21 and the bearing member 313 can be fixedly connected with the mounting member 34.

[0168] In some embodiments, the pushing structure 31 includes the bearing member 313. In this case, the cutting member 21 can be arranged on the bearing member 313, so as to be supported by the bearing member 313.

[0169] In some embodiments, referring to FIGS. 3, 9-13, the mounting member 34 can be in the shape of a cylinder, so that the first rotary driving module 331 drives the mounting member 34 to rotate. Of course, the mounting member 34 can also be in the shape of a prism, a cuboid or the like, so that the first rotary driving module 331 drives the mounting member 34 to rotate.

[0170] In some embodiments, referring to FIGS. 14 and 15, the mounting member 34 can be in the shape of a cuboid, so that the first linear driving module 332 drives the mounting member 34 to move linearly. Of course, the mounting member 34 can also be in the shape of a cylinder, a prism or the like, so that the first linear driving module 332 drives the mounting member 34 to move linearly.

[0171] In some embodiments, the cutting member 21 is fixedly connected with the pushing structure 31, and the feeding driving unit 33 drives the cutting member 21 to move with the pushing structure 31 to cut the composite tape 90.

[0172] In some embodiments, the pushing structure 31 is fixed, and the feeding driving unit 33 drives the pushing structure 31 to move to push the end of the composite tape 90 into the groove 110. For example, the pushing structure 31 includes a pushing plate 311, the pushing plate 311 is fixed, and the feeding driving unit 33 drives the pushing plate 311 to move to push the end of the composite tape 90 into the groove 110. For another example, the pushing structure 31 includes a carrying member 313, the carrying member 313 is fixed, and the feeding driving unit 33 drives the carrying member 313 to move to blow the end of the composite tape 90 into the groove 110.

[0173] In some embodiments, the first linear driving module 332 includes a slide plate 3323, a base plate 3321, a slide rail 3322, a screw nut mechanism 3324, and a first motor 3325. The slide rail 3322 is installed on the base plate 3321, the screw nut mechanism 3324 is installed on the base plate 3321, the slide plate 3323 is slidingly installed on the slide rail 3322, the first motor 3325 is connected with the screw nut mechanism 3324, and the pushing structure 31 is installed on the slide plate 3323 through the mounting member 34. The slide plate 3323 is a plate-shaped member used to support the mounting member 34 and the pushing structure 31 and is slidingly installed on the slide rail 3322. The base plate 3321 is a plate-shaped member used to support the slide rail 3322, the screw nut mechanism 3324, and the first motor 3325. The slide rail 3322 refers to a track structure used to guide the movement of an object. The first motor 3325 drives the slide plate 3323 to move, so as to drive the pushing structure 31 to move linearly as a whole, and then drive the mounting member 34 and the pushing structure 31 to move linearly. The use of the screw nut mechanism 3324 to drive the slide plate 3323 and the pushing structure 31 to move linearly can more accurately move the pushing structure 31.

[0174] In some embodiments, the first linear driving module 332 includes a slide plate 3323, a base plate 3321, a slide rail 3322, a screw nut mechanism 3324, and a first motor 3325. The slide rail 3322 is installed on the base plate 3321, the screw nut mechanism 3324 is installed on the base plate 3321, the slide plate 3323 is slidingly installed on the slide rail 3322, the first motor 3325 is connected with the screw nut mechanism 3324, and the pushing structure 31 is installed on the slide plate 3323 through the mounting member 34. The slide plate 3323 is a plate-shaped member used to support the mounting member 34 and the pushing structure 31 and is slidingly installed on the slide rail 3322. The base plate 3321 is a plate-shaped member used to support the slide rail 3322, the screw nut mechanism 3324, and the first motor 3325. The slide rail 3322 refers to a track structure used to guide the movement of an object. The first motor 3325 drives the slide plate 3323 to move, so as to drive the pushing structure 31 to move linearly as a whole, and then drive the mounting member 34 and the pushing structure 31 to move linearly. The use of the screw nut mechanism 3324 to drive the slide plate 3323 and the pushing structure 31 to move linearly can more accurately move the pushing structure 31.

[0175] In the above embodiment, when the feeding driving unit 33 comprises the first linear driving module 332 and the first rotary driving module 331, the second motor 3312 can be installed on the slide plate 3323, and the gear set 3313 is rotatably installed on the slide plate 3323, so as to support the second motor 3312 and the slide plate 3323 through the slide plate 3323, and then the first rotary driving module 331.

[0176] In some embodiments, when the feeding mechanism 30 comprises the mounting piece 34, the supporting shaft 3311 is connected with the mounting piece 34, so as to fix the pushing structure 31 on the supporting shaft 3311.

[0177] Referring to FIGS. 2, 3, 9-16, in some embodiments, the cutting mechanism 20 comprises a cutting piece 21 for cutting the composite tape 90 and a cutting driving unit 22 for driving the cutting piece 21 to cut and move.

[0178] The cutting driving unit refers to a power device for driving the cutting piece 21 to move towards the winding needle 11, so that the cutting piece 21 cuts part of the composite tape 90 adhered to the winding needle 11.

[0179] The cutting driving unit 22 is arranged to drive the cutting piece 21 to move, so that the cutting piece 21 moves towards the composite tape 90 to cut the composite tape 90.

[0180] In some embodiments, the cutting driving unit 22 comprises a second rotary driving module 221 for driving the cutting piece 21 to rotate.

[0181] The second rotary driving module 221 refers to a rotary driving module for driving the cutting piece 21 to rotate. The transfer mechanism 40 moves the winding needle 11 to the vicinity of the cutting mechanism 20, the second rotary driving module 221 drives the cutting piece 21 to rotate, so that the cutting piece 21 rotates to the composite tape 90 near the groove 110 of the winding needle 11, so as to cut the composite tape 90.

[0182] The second rotary driving module 221 is arranged to drive the cutting piece 21 to rotate, so that when the winding needle 11 is close to the cutting piece 21, the cutting piece 21 rotates to the composite tape 90 to cut the composite tape 90, which has simple structure and small space occupation.

[0183] Referring to FIG. 16, in some embodiments, the cutting driving unit 22 comprises a second linear driving module 222 for driving the cutting piece 21 to move linearly.

[0184] The second linear driving module 222 refers to a linear driving module for driving the cutting member 21 to move linearly. The transfer mechanism 40 moves the winding needle 11 to the vicinity of the cutting mechanism 20, and the second linear driving module 222 drives the cutting member 21 to move toward the position of the winding needle 11 close to the groove 110, so that the cutting member 21 cuts the composite tape 90.

[0185] The second linear driving module 222 is arranged to drive the cutting member 21 to move linearly, so that when the winding needle 11 approaches the cutting member 21, the cutting member 21 moves toward the composite tape 90 to cut the composite tape 90.

[0186] In some embodiments, referring to FIGS. 9-15, when the cutting member 21 is fixedly connected to the pushing structure 31, such as when the cutting member 21 and the pushing structure 31 are both fixed to the mounting member 34, the feeding mechanism 30 includes a feeding driving unit 33, and the cutting mechanism 20 includes a cutting driving unit 22. In this case, the feeding driving unit 33 and the cutting driving unit 22 can be the same structure. For example, when the feeding driving unit 33 includes a first rotary driving module 331, and the cutting driving unit 22 includes a second rotary driving module 221, the first rotary driving module 331 and the second rotary driving module 221 are the same structure. For example, when the feeding driving unit 33 includes a first linear driving module 332, and the cutting driving unit 22 includes a second linear driving module 222, the first linear driving module 332 and the second linear driving module 222 are the same structure.

[0187] In some embodiments, the cutting mechanism 20 includes a cutting member 21 for cutting the composite tape 90 and a cutting driving unit 22 for driving the cutting member 21 to move for cutting. The feeding mechanism 30 includes a pushing structure 31 for pushing the end of the composite tape 90 and a feeding driving unit 33 for driving the pushing structure 31 to move toward the groove 110. In this case, the feeding driving unit 33 and the cutting driving unit 22 are the same structure.

[0188] The feeding driving unit 33 and the cutting driving unit 22 use the same structure to drive the cutting member 21 and the pushing structure 31 to move synchronously, and simplify the structure.

[0189] Referring to FIG. 16, the cutting mechanism 20 further includes a support member 23, and the cutting member 21 is fixed to the support member 23. The support member 23 supports the cutting member 21, which facilitates the cutting member 21 to cut the composite tape 90.

[0190] In some embodiments, when the feeding driving unit 33 includes the second linear driving module 222, the support member 23 can be connected to the second linear driving module 222.

[0191] In some embodiments, when the feeding driving unit 33 comprises the second rotary driving module 221, the support 23 can be connected to the second rotary driving module 221.

[0192] In some embodiments, when the feeding driving unit 33 comprises the second rotary driving module 221 and the second linear driving module 222, the cutting member 21 can be connected to the second rotary driving module 221, and the second rotary driving module 221 is connected to the second linear driving module 222, so that the second linear driving module 222 drives the second rotary driving module 221 and the cutting member 21 to move close to and away from the winding needle 11, and the second rotary driving module 221 drives the cutting member 21 to rotate, so as to adjust the angle of the cutting member 21, and the cutting member 21 can cut the specified position of the composite tape body 90 more accurately.

[0193] In the above-mentioned embodiments, when the feeding mechanism 30 comprises the support 23, the support 23 is connected to the second rotary driving module 221.

[0194] In some embodiments, when the feeding driving unit 33 comprises the second rotary driving module 221 and the second linear driving module 222, the cutting member 21 can also be connected to the second linear driving module 222, and the second linear driving module 222 is connected to the second rotary driving module 221, so that the second rotary driving module 221 drives the second linear driving module 222 and the cutting member 21 to rotate, so as to adjust the angle of the second linear driving module 222 and the cutting member 21, and the second linear driving module 222 drives the cutting member 21 to move close to and away from the winding needle 11, so that the cutting member 21 can cut the specified position of the composite tape body 90 accurately.

[0195] In the above-mentioned embodiments, when the feeding mechanism 30 comprises the support 23, the support 23 is connected to the second linear driving module 222.

[0196] In some embodiments, when the feeding driving unit 33 comprises the second rotary driving module 221, the support 23 can be connected to the second rotary driving module 221.

[0197] In some embodiments, when the feeding driving unit 33 comprises the second linear driving module 222, the support 23 can be connected to the second linear driving module 222.

[0198] Please refer to FIG. 16 and FIG. 17, in some embodiments, the inner wall of the groove 110 is provided with an air suction hole 32, and the air suction hole 32 is used to suck the end of the composite tape body 90 into the groove 110.

[0199] The suction hole 32 refers to a hole structure for sucking gas in the groove 110. The suction hole 32 is arranged on the inner wall of the groove 110, so that a negative pressure is generated in the groove 110 to suck the end of the composite tape 90 into the groove 110. In this case, the suction hole 32 can constitute the feeding mechanism 30.

[0200] The suction hole 32 is arranged on the inner wall of the groove 110, so that a negative pressure is generated in the groove 110 to suck the end of the composite tape 90 into the groove 110. In this case, the suction hole 32 can constitute the feeding mechanism 30.

[0201] In some embodiments, the feeding mechanism 30 can simultaneously include the pushing structure 31 and the suction hole 32 arranged on the inner wall of the groove 110.

[0202] Please refer to FIG. 2, FIG. 3, FIG. 12, FIG. 14, FIG. 16 and FIG. 17. In some embodiments, the clamping structure 112 includes an air bag 1121 arranged in the groove 110.

[0203] The air bag 1121 refers to a bag, a shell or other structural member that expands when inflated and shrinks when deflated.

[0204] The air bag 1121 is used to clamp the end of the composite tape 90, which is simple in structure, fast in response and high in efficiency.

[0205] In some embodiments, the air bag 1121 can be arranged on one side wall of the groove 110, and when the end of the composite tape 90 extends into the groove 110, it is resisted by the air bag 1121 on the other side wall of the groove 110 to fix the end of the composite tape 90.

[0206] In some embodiments, the air bag 1121 can be arranged on the opposite two side walls of the groove 110, respectively, and when the end of the composite tape 90 extends into the groove 110, the opposite two air bags 1121 expand to clamp and fix the end of the composite tape 90.

[0207] Please refer to FIG. 18. In some embodiments, the clamping structure 112 includes a clamping cylinder 1122, which is used to clamp and fix the end of the composite tape 90. The clamping cylinder 1122 refers to a cylinder used to resist and fix the end of the composite tape 90. In some other embodiments, the clamping structure 112 includes a linear motor, which is used to clamp and fix the end of the composite tape 90.

[0208] In some embodiments, the opposite two sides of the winding needle 11 are respectively provided with the groove 110.

[0209] The opposite two sides of the winding needle 11 refer to the opposite two sides in the radial direction of the winding needle 11.

[0210] The recess 110 is arranged on the opposite side of the winding needle 11, which can not only accommodate the end of the composite tape 90, but also use the recess 110 on the two sides of the winding needle 11 as a discharging groove to simplify the structure of the winding needle 11.

[0211] In some embodiments, the recess 110 is used as a discharging groove, which can reduce the groove structure on the winding needle 11 to improve the smoothness of the outer circumferential surface of the winding needle 11, thereby reducing the risk of creases in the electrode assembly 900.

[0212] Please refer to FIGS. 4-6, in some embodiments, the winding needle 11 includes a plurality of outer needles 111, and the recess 110 is formed between at least two outer needles 111.

[0213] The outer needle 111 refers to a long rod-shaped structural member used to directly hold the composite tape 90 during winding.

[0214] The plurality of outer needles 111 are arranged to form the recess 110 between two outer needles 111, which is simple in structure and easy to manufacture.

[0215] Please refer to FIGS. 17 and 18, in some embodiments, the winding needle 11 is an integral structure.

[0216] The integral forming of the winding needle 11 refers to the whole winding needle 11 or the outer needle 111 of the winding needle 11 being an integral structure.

[0217] The integral forming of the winding needle 11 is simple in structure and easy to manufacture.

[0218] Please refer to FIGS. 4-6, in some embodiments, the winding device 100 further includes a third rotary driving module 12 for driving the rotation of the winding needle 11, and the third rotary driving module 12 corresponds to the winding needle 11 one-to-one, and the winding needle 11 is installed on the corresponding third rotary driving module 12.

[0219] The third rotary driving module 12 refers to a rotary driving module for driving the rotation of the winding needle 11. The third rotary driving module 12 corresponds to the winding needle 11 one-to-one, which means that the third rotary driving module 12 is multiple, and each third rotary driving module 12 is installed with a winding needle 11, and the third rotary driving module 12 and the corresponding winding needle 11 form the winding mechanism 10.

[0220] The third rotary driving module 12 is arranged to drive the rotation of the winding needle 11, thereby realizing the winding of the composite tape 90 to form the electrode assembly 900.

[0221] In some embodiments, the third rotary driving module 12 can also be provided one or a plurality of winding needles 11, and the winding needle 11 is moved to the corresponding third rotary driving module 12 by the moving mechanism 40, so that the third driving module drives the corresponding winding needle 11 to rotate.

[0222] Referring to FIG. 2 and FIG. 3, in some embodiments, the moving mechanism 40 includes a rotating disc 41 and a fourth rotary driving module 42 for driving the rotating disc 41 to rotate, and each winding needle 11 is installed on the rotating disc 41.

[0223] The rotating disc 41 refers to a disc-shaped structural member, and the rotating disc 41 is provided to support the winding needle 11.

[0224] The fourth rotary driving module 42 refers to a rotary driving module for driving the rotating disc 41 to rotate.

[0225] The rotating disc 41 is provided to support each winding needle 11, and the fourth rotary driving module 42 is provided to drive the rotating disc 41 to rotate, thereby driving the winding needle 11 supported by the rotating disc 41 to rotate, so as to facilitate the winding needle 11 to wind the electrode assembly 900.

[0226] In some embodiments, when the winding device 100 includes the winding mechanism 10, the third rotary driving module 12 of the winding mechanism 10 can be installed on the rotating disc 41, so as to support the third rotary driving module 12 by the rotating disc 41, thereby supporting the corresponding winding needle 11.

[0227] In some embodiments, the moving mechanism 40 can also use a mechanical hand to move each winding needle 11.

[0228] In some embodiments, the moving mechanism 40 can also use a support and the fourth rotary driving module 42, the support supports each winding needle 11, and the fourth rotary driving module 42 drives the support to rotate, thereby driving each winding needle 11 to sequentially approach the cutting mechanism 20.

[0229] Referring to FIGS. 1-9, according to some embodiments of the present application, a winding device 100 is provided, which comprises a plurality of winding mechanisms 10, a cutting mechanism 20, a transferring mechanism 40 and a feeding mechanism 30. Each winding mechanism 10 comprises a winding needle 11 and a third rotary driving module 12, the winding needle 11 being connected with the third rotary driving module 12 to drive the corresponding winding needle 11 to rotate. The circumferential side surface of each winding needle 11 is provided with a groove 110 along the axial direction X, and the groove 110 is provided with a clamping structure 112 for clamping the end of the composite tape 90. The clamping structure 112 comprises an air bag 1121 provided in the groove 110. The cutting mechanism 20 comprises a cutting member 21, which is a blade 213 for cutting the composite tape 90, a heating rod 211 for melting the composite tape 90 or a heating wire 212 for melting the composite tape 90. The feeding mechanism 30 comprises a pushing structure 31 and a feeding driving unit 33 for driving the pushing structure 31 to move towards the groove 110. The pushing structure 31 comprises a push plate 311 for pushing the end of the composite tape 90, and the push plate 311 is provided with a first air blowing hole 312 for blowing the end of the composite tape 90 into the groove 110, and the cutting member 21 is arranged on the push plate 311. The transferring mechanism 40 comprises a rotating disc 41 and a fourth rotary driving module 42 for driving the rotating disc 41 to rotate, and each winding mechanism 10 is mounted on the rotating disc 41. During the winding of the upper winding needle 11 on the composite tape 90, the rotating disc 41 rotates to enable the lower winding needle 11 to move to a position close to the cutting member 21, and when the upper winding needle 11 winds the composite tape 90 by a set length, the cutting member 21 can cut the composite tape 90 close to the position of the lower winding needle 11, and the push plate 311 pushes the composite tape 90 into the groove 110 of the lower winding needle 11, and the first air blowing hole 312 on the push plate 311 blows out gas to flatten the end of the cut composite tape 90 towards the inside of the groove 110 to be clamped and fixed by the air bag 1121 in the lower winding needle 11, so that the lower winding needle 11 winds the composite tape 90. During this process, the upper winding needle 11 can continue to wind the electrode assembly 900 to finish winding the electrode assembly 900, thereby improving the manufacturing efficiency of the electrode assembly 900.

[0230] According to some embodiments of the present application, the present application also provides a battery processing equipment, which comprises the winding device 100 of any one of the above-mentioned schemes.

[0231] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A winding device, characterized in that: include: A cutting mechanism, used for cutting the composite strip; A plurality of winding needles, wherein the peripheral side surfaces of the winding needles are provided with grooves along the axial direction of the winding needles, and the grooves are provided with clamping structures for clamping the ends of the composite strip body; A transfer mechanism, used for sequentially moving the plurality of winding needles to the cutting mechanism; The feeding mechanism is used to feed the end portion of the composite strip formed after being cut into the groove.

2. The winding device according to claim 1, wherein The feeding mechanism includes a pushing structure for pushing the end portion of the composite strip.

3. The winding device according to claim 2, wherein: The pushing structure includes a pushing plate for pushing the end portion of the composite belt.

4. The winding device according to claim 3, wherein The push plate is provided with a first blowing hole for blowing the end portion of the composite strip into the groove.

5. The winding device according to any one of claims 2 to 4, characterized in that: The pushing structure includes a supporting member placed outside the groove and used to align with the groove. The supporting member is provided with a second blowing hole used to blow the end of the composite strip into the groove.

6. The winding device according to any one of claims 2 to 5, characterized in that: The feeding mechanism further includes a feeding drive unit for driving the pushing structure to move toward the groove; The feeding drive unit includes a first rotation drive module that drives the pushing structure to rotate, and / or the feeding drive unit includes a first linear drive module that drives the pushing structure to move linearly.

7. The winding device according to any one of claims 2 to 6, characterized in that: The cutting mechanism includes a cutting piece for cutting the composite strip, and the cutting piece is fixedly connected to the pushing structure.

8. The winding device according to claim 7, wherein: The cutting member is a blade for cutting the composite strip, a heating rod for melting the composite strip, or a heating wire for melting the composite strip.

9. The winding device according to claim 7 or 8, characterized in that The cutting mechanism further includes a cutting drive unit for driving the cutting piece to move in cutting, and the feeding mechanism further includes a feeding drive unit for driving the pushing structure to move toward the groove, and the feeding drive unit and the cutting drive unit have the same structure.

10. The winding device according to any one of claims 1 to 8, characterized in that The cutting mechanism includes a cutting piece for cutting the composite strip and a cutting drive unit for driving the cutting piece to move in cutting; The cutting drive unit includes a second rotation drive module for driving the cutting piece to rotate, and / or the cutting drive unit includes a second linear drive module for driving the cutting piece to move linearly.

11. The winding device according to any one of claims 1 to 10, characterized in that: An air suction hole is provided on the inner wall of the groove, and the air suction hole is used to suck the end of the composite strip into the groove.

12. The winding device according to any one of claims 1 to 11, characterized in that: The clamping structure includes an air bag disposed in the groove.

13. The winding device according to any one of claims 1 to 12, characterized in that: The grooves are respectively provided on two opposite sides of the winding needle.

14. The winding device according to any one of claims 1 to 13, characterized in that: The winding needle includes a plurality of outer needles, and the groove is formed between at least two of the outer needles.

15. The winding device according to any one of claims 1 to 14, characterized in that: The winding needle is an integrally formed structure.

16. The winding device according to any one of claims 1 to 15, characterized in that: The winding device further includes a third rotation driving module for driving the winding needle to rotate. The third rotation driving module corresponds to the winding needle in a one-to-one manner, and the winding needle is installed on the corresponding third rotation driving module.

17. The winding device according to any one of claims 1 to 16, characterized in that: The transfer mechanism includes a turntable and a fourth rotation drive module for driving the turntable to rotate, and each of the winding needles is installed on the turntable.

18. A battery processing device, characterized in that: Comprising a winding device as described in any one of claims 1-17.

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