阅读说明：本技术 料带牵引机构、料带卷绕装置及料带卷绕方法 (Material belt traction mechanism, material belt winding device and material belt winding method ) 是由 不公告发明人 于 2019-10-15 设计创作，主要内容包括：本申请提供一种料带牵引机构,所述料带牵引机构包括用于夹持料带的夹持组件、用于驱动所述夹持组件移动的驱动组件、以及将所述夹持组件与所述驱动组件连接,并用于在所述夹持组件夹持的料带产生张力波动时相应地降低张力波动的缓冲组件。本申请还提供包含所述料带牵引机构的料带卷绕装置和相应的料带卷绕方法。(The application provides a material area drive mechanism, material area drive mechanism is including the centre gripping subassembly that is used for the centre gripping material area, be used for the drive assembly that the centre gripping subassembly removed and with the centre gripping subassembly with drive assembly connects, and is used for the material area of centre gripping subassembly centre gripping correspondingly reduces the undulant buffering subassembly of tension when producing tension undulant. The application also provides a material belt winding device comprising the material belt traction mechanism and a corresponding material belt winding method.)

1. The utility model provides a material area drive mechanism, its characterized in that, material area drive mechanism includes:

the clamping assembly is used for clamping the material belt;

the driving component is used for driving the clamping component to move;

the clamping assembly is connected with the driving assembly, and the buffering assembly is used for correspondingly reducing tension fluctuation when the material belt clamped by the clamping assembly generates tension fluctuation.

2. The tape pulling mechanism of claim 1, wherein said clamping assembly comprises:

the clamping jaw is used for clamping the material belt;

the clamping jaw driver is in transmission connection with the clamping jaw and is used for driving the clamping jaw to clamp or release;

and the fixture fixing seat is used for connecting the clamping assembly with the buffering assembly.

3. The tape pulling mechanism of claim 1, wherein said buffer assembly comprises a buffer cylinder, said buffer cylinder having a fixed end and a driving end, said fixed end being connected to said driving assembly, said driving end being connected to said clamping assembly; the driving end is used for correspondingly stretching when the material belt clamped by the clamping assembly generates tension fluctuation so as to reduce the tension fluctuation.

4. The tape pulling mechanism of any one of claims 1-3, further comprising:

and the deviation rectifying assembly is in transmission connection with the driving assembly and is used for driving the driving assembly, the buffering assembly and the clamping assembly to move so as to rectify the deviation of the material belt clamped by the clamping assembly in the width direction.

5. The tape pulling mechanism of claim 4, wherein said drive assembly comprises a main motor, a main lead screw, and a connecting block; the main motor is in transmission connection with the connecting block through the main screw rod, the connecting block is connected with the buffering assembly and used for enabling the main motor to drive the buffering assembly and the clamping assembly to move through the main screw rod and the connecting block.

6. The tape traction mechanism of claim 4, wherein the deviation correcting component comprises a deviation correcting motor, a deviation correcting screw rod and a deviation correcting carrier plate; the motor of rectifying passes through the lead screw of rectifying with it is connected to rectify and move the transmission of transfer board, rectify the skew support plate with drive assembly connects, is used for letting the motor of rectifying pass through the lead screw of rectifying with rectify the skew support plate drive assembly buffer assembly with the centre gripping subassembly removes.

7. A tape winding device, characterized in that the tape winding device comprises an unwinding mechanism, a winding needle mechanism, and a tape traction mechanism according to any one of the preceding claims 1-6; the unwinding mechanism is used for installing a material roll and discharging a material belt from the material roll; the needle winding mechanism is used for clamping and winding the material belt; the material belt traction mechanism is used for traction the end part of the material belt.

8. The tape winding device of claim 7, wherein said winding needle mechanism is disposed between said unwinding mechanism and said tape pulling mechanism and defines a slit for allowing said tape to pass through said slit and then be secured to said tape pulling mechanism.

9. A method of winding a web, comprising the steps of:

providing a material belt to be wound;

fixing and drawing the material belt by using a material belt drawing mechanism;

clamping the material belt by using a needle winding mechanism;

and pre-rolling the material belt by using the winding needle mechanism.

10. The method of claim 9, wherein said gripping the strip of material with a needle roller mechanism comprises:

and mutually inserting a first winding needle and a second winding needle to form a slit between the first winding needle and the second winding needle, wherein the material belt is clamped in the slit.

Technical Field

The application relates to the technical field of battery manufacturing equipment, in particular to a material belt traction mechanism, a material belt winding device and a material belt winding method.

Background

Wound cells are currently widely used in batteries. The method for producing the winding cell generally uses cell winding equipment to wind a plurality of material belts such as a positive plate material belt, a diaphragm material belt and a negative plate material belt together to form a columnar winding cell. In the winding process, a tape traction mechanism is generally required to pull the end portions of the tapes so that the tapes maintain sufficient flatness and a certain tension to ensure that the wound cells have a compact and firm structure. However, most of the existing tape traction mechanisms for the cell winding equipment in the market at present are not ideal enough in terms of positioning accuracy, and it is difficult to eliminate tension fluctuation of the tape, which is easy to cause adverse effect on the quality of the wound cells.

Disclosure of Invention

The main technical problem who solves of this application provides a material area drive mechanism, has higher positioning accuracy and can eliminate the tension fluctuation in material area, helps further improving the quality of coiling electric core.

In order to solve the above technical problem, one technical solution adopted in the embodiments of the present application is: the utility model provides a material area drive mechanism, material area drive mechanism is including the centre gripping subassembly that is used for the centre gripping material area, be used for the drive assembly that the centre gripping subassembly removed, will the centre gripping subassembly with drive assembly connects, and is used for when the material area of centre gripping subassembly centre gripping produces the undulant buffering subassembly of corresponding reduction tension.

Wherein, the centre gripping subassembly including be used for the centre gripping clamping jaw in material area, with the clamping jaw transmission is connected, is used for the drive the clamping jaw presss from both sides tight or the clamping jaw driver who relaxs, is used for with the centre gripping subassembly with the anchor clamps fixing base that the buffering subassembly is connected.

The buffer assembly comprises a buffer cylinder, the buffer cylinder is provided with a fixed end and a driving end, the fixed end is connected with the driving assembly, and the driving end is connected with the clamping assembly; the driving end is used for correspondingly stretching when the material belt clamped by the clamping assembly generates tension fluctuation so as to reduce the tension fluctuation.

The material belt traction mechanism further comprises a deviation rectifying assembly in transmission connection with the driving assembly and used for driving the driving assembly, the buffering assembly and the clamping assembly to move so as to correct deviation of the material belt clamped by the clamping assembly in the width direction.

The driving assembly comprises a main motor, a main screw rod and a connecting block; the main motor is in transmission connection with the connecting block through the main screw rod, the connecting block is connected with the buffering assembly and used for enabling the main motor to drive the buffering assembly and the clamping assembly to move through the main screw rod and the connecting block.

The deviation correcting component comprises a deviation correcting motor, a deviation correcting screw rod and a deviation correcting carrier plate; the motor of rectifying passes through the lead screw of rectifying with it is connected to rectify and move the transmission of transfer board, rectify the skew support plate with drive assembly connects, is used for letting the motor of rectifying pass through the lead screw of rectifying with rectify the skew support plate drive assembly buffer assembly with the centre gripping subassembly removes.

Another technical scheme adopted by the embodiment of the application is a material belt winding device, which comprises an unwinding mechanism, a winding needle mechanism and the material belt traction mechanism; the unwinding mechanism is used for installing a material roll and discharging a material belt from the material roll; the needle winding mechanism is used for clamping and winding the material belt; the material belt traction mechanism is used for traction the end part of the material belt.

The winding needle mechanism is arranged between the unwinding mechanism and the material belt traction mechanism and is provided with a slit, and the material belt is fixed on the material belt traction mechanism after passing through the slit.

Another technical scheme adopted by the embodiment of the application is a material belt winding method, which comprises the following steps: providing a material belt to be wound; fixing and drawing the material belt by using a material belt drawing mechanism; clamping the material belt by using a needle winding mechanism; and pre-rolling the material belt by using the winding needle mechanism.

Wherein, utilize the book needle mechanism centre gripping the material area includes: and mutually inserting a first winding needle and a second winding needle to form a slit between the first winding needle and the second winding needle, wherein the material belt is clamped in the slit.

Compared with the prior art, the material belt traction mechanism provided by the application according to the above preferred embodiment, and the corresponding material belt winding device and the material belt winding method thereof can obtain the following beneficial effects in many aspects: (1) adopt above-mentioned drive assembly and centre gripping subassembly cooperation, can stabilize the centre gripping material area and pull the material area and carry out steady rectilinear movement, can pull out ideal predetermined length to the material area accurately, consequently can obtain good positioning accuracy, can be applicable to the electric core of multiple specification, especially the coiling operation that is used for small-size and miniature electronic device such as the small dimension electric core of bluetooth headset. (2) Preferably adopt the motor as the power supply, the efficiency of conveying the material area is higher, has further improved the efficiency of electric core coiling operation. (3) The buffer assembly can effectively reduce the tension fluctuation of the material belt, so that the material belt can be conveyed under preset constant tension, and the winding quality of the battery cell is further improved. (4) By adopting the deviation rectifying assembly, the position of the material belt can be corrected at any time in the width direction of the material belt, the improvement of the positioning precision is facilitated, and the winding quality of the battery cell is improved.

Drawings

Fig. 1 is a schematic structural diagram of a tape pulling mechanism according to a preferred embodiment of the present application.

Fig. 2 is a schematic structural diagram of the tape drawing mechanism shown in fig. 1 from another view angle.

Fig. 3 is a schematic structural diagram of a tape winding device according to a preferred embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first", "second", etc. in this application are used to distinguish between different objects and not to describe a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

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 appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Fig. 1 is a schematic structural diagram of a tape pulling mechanism 100 according to a preferred embodiment of the present application, and fig. 2 further illustrates the schematic structural diagram of the tape pulling mechanism 100 from another view angle. In this embodiment, the tape drawing mechanism 100 includes a clamping assembly 10, a driving assembly 20, a buffering assembly 30 and a deviation rectifying assembly 40. The clamping assembly 10 is used to clamp a strip of material, such as a strip of positive electrode sheets, a strip of negative electrode sheets, a strip of separator material, or the like, used to wind to form a wound cell when manufacturing the wound cell. The driving assembly 20 is drivingly connected to the clamping assembly 10 for driving the clamping assembly 10 to move in a predetermined manner so as to convey the strip held by the clamping assembly 10 to a predetermined position. The buffer assembly 30 may be connected between the driving assembly 20 and the clamping assembly 10 for providing a buffer effect to ensure a stable tension of the tape clamped by the clamping assembly 10. The deviation correcting assembly 40 can be in transmission connection with the driving assembly 20 to correct the position deviation of the material strip clamped by the clamping assembly 10, which may occur during the operation.

Referring specifically to fig. 1 and 2, the clamping assembly 10 preferably includes a clamping jaw 11, a clamping jaw driver 12, and a clamp mount 13. The clamping jaws 11 are used for clamping the material belt. The clamping jaw driver 12 is in transmission connection with the clamping jaw 11 and is used for driving the clamping jaw 11 to clamp or release. In the present embodiment, the jaw driver 12 is preferably a pneumatic cylinder. The clamp holder 13 is used to firmly connect the clamping assembly 10 to the driving assembly 20 or the buffering assembly 30, and preferably used to connect the clamping assembly 10 to the buffering assembly 30 in this embodiment.

The drive assembly 20 preferably includes a drive base 21, a drive mounting 22, a main motor 23, a main coupling 24, a main screw support 25, a main screw 26, a connecting block 27, and a main slide 28. The driving base plate 21 is a flat plate, and the second fixing base 22, the main motor 23, the main coupling 24, the main screw support 25, the main screw 26, the connecting block 27, and the main sliding mechanism 28 are all disposed on the same side of the driving base plate 21 (for example, the left side of the driving base plate 21 in fig. 2). The shape of the driving fixing seat 22 is preferably a right-angle plate, and includes a bottom plate fixing plate (not numbered in the figure) and a motor fixing plate (not numbered in the figure) which are connected together or integrally formed and are perpendicular to each other; the base plate fixing plate is fixed parallel to the drive base plate 21 at one end of the surface on the same side as the drive base plate 21 (e.g., the lower end of the left side surface of the drive base plate 21 shown in fig. 2) by means of, for example, bolting, riveting, welding, or the like, and the end of the base plate fixing plate to which the motor fixing plate is connected is preferably arranged beyond the edge of the drive base plate 21 so that the motor fixing plate is perpendicular to the drive base plate 21 and at least one surface (e.g., the lower surface, i.e., the surface facing outward, shown in fig. 2) of the motor fixing plate is located in a plane that does not intersect with. The main motor 23 is preferably mounted on an outwardly facing surface (e.g., a lower side surface as viewed in fig. 2) of the motor fixing plate, the main coupling 24 is mounted on the other side surface (e.g., an upper side surface as viewed in fig. 2) of the motor fixing plate opposite to the surface on which the main motor 23 is located, and the main screw support 25 is mounted on the surface of the drive base plate 21 on the same side as the above, preferably at a position adjacent to the main coupling 24; the main screw rod 26 is arranged on the main screw rod support 25, and the main motor 23 is in transmission connection with one end of the main screw rod 26 through the main coupling 24, so that the main motor 23 can drive the main screw rod 26 to rotate. The main screw 26 further comprises a main screw nut 261, the main screw nut 261 being mounted at the other end of the main screw 26 (i.e. the end remote from the main coupling 24), the rotation of the main screw 26 being capable of driving the main screw nut 261 to move in the axial direction of the main screw 26 in accordance with known screw operating principles.

The attachment block 27 preferably includes a main stem attachment plate 271, an intermediate attachment plate 272, and a clamp attachment plate 273 that are attached together or integrally formed. The main screw connecting plate 271, the intermediate connecting plate 272, and the clamp connecting plate 273 may each have a flat plate shape, and in this embodiment, the main screw connecting plate 271 and the clamp connecting plate 273 are respectively connected to both ends of the intermediate connecting plate 272 perpendicularly to the intermediate connecting plate 272 such that the main screw connecting plate 271 and the clamp connecting plate 273 are respectively located in two planes parallel to each other, and the main screw connecting plate 271 and the clamp connecting plate 273 are arranged to extend in two opposite directions, respectively. An end (e.g., a lower end as viewed in fig. 2) of the main screw connecting plate 271 remote from the intermediate connecting plate 272 is connected to the main screw nut 261, so that the connecting block 27 is in transmission connection with the main motor 23 and can move in the axial direction of the main screw 26 by the driving of the main screw nut 261.

The main slide mechanism 28 includes a main slide plate 281, a main slider 282, and a main slide rail 283. The main sliding plate 281 may be a flat plate-shaped plate disposed in parallel with the driving base plate 21, and a surface (e.g., a right side surface as viewed in fig. 2) of the main wire connecting plate 271 opposite to the intermediate connecting plate 272 may be fixedly connected to the main sliding plate 281 by, for example, bolting, riveting, welding, or the like. The number of the main sliders 282 is preferably at least two, and may be fixedly installed on the main sliding plate 281. The main slide rail 283 may be installed on the same side surface of the driving base plate 21 as described above, and the main slider 282 may be slidably installed on the main slide rail 283. Thus, the connecting block 27 can be slidably mounted on the driving base 21 by the main slide mechanism 28. When the main screw nut 261 drives the connecting block 27 to move along the axial direction of the main screw 26, the connecting block 27 can slide stably rather than move in the air under the support of the main sliding mechanism 28, which is beneficial to ensuring the smoothness and precision of movement.

The damping assembly 30 preferably includes a damping cylinder (not numbered) having a fixed end and a drive end (not numbered), wherein the fixed end is preferably fixedly attached to an outside surface (e.g., the left side surface as shown in fig. 2) of the clamp attachment plate 273, and the clamping assembly 10 is preferably attached to the drive end of the damping cylinder. Like this, when the material area of centre gripping subassembly 10 centre gripping produced the tension undulant, the drive end of cushion cylinder can stretch out and draw back correspondingly in order to reduce the undulant influence of tension, and cushion cylinder can also provide predetermined constant tension simultaneously to can guarantee the tensile stability in material area. In other embodiments, the cushion assembly 30 may alternatively or additionally include other cushioning devices such as air springs, and the like.

The deviation correcting assembly 40 is preferably disposed on the other side of the driving base plate 21 (for example, the right side of the driving base plate 21 shown in fig. 2), and includes a deviation correcting base plate 41, a deviation correcting fixing seat 42, a deviation correcting motor 43, a deviation correcting coupler 44, a deviation correcting screw rod support 45, a deviation correcting screw rod 46, a deviation correcting transfer plate 47, and a deviation correcting sliding mechanism 48. The deviation rectification base plate 41 is preferably shaped as a flat plate and can be fixedly mounted on an external mounting area, such as a predetermined mounting rack or mounting plate (not shown). The rectification fixing base 42 is preferably flat, can be installed on the edge of the rectification base plate 41 perpendicularly to the rectification base plate 41, and at least one surface (for example, the right side surface, i.e., the surface facing the outside as shown in fig. 2) of the rectification fixing base 42 is preferably arranged to be beyond the edge of the rectification base plate 41. The deskew motor 43 may be mounted on an outwardly facing surface (e.g., the right side surface as viewed in FIG. 2) of the deskew mount 42. The deviation correcting coupler 44 is installed on the other side surface (for example, the left side surface shown in fig. 2) of the deviation correcting fixing seat 42 opposite to the surface on which the deviation correcting motor 43 is located, and the deviation correcting screw support 45 is installed on the deviation correcting base plate 41, preferably at a position adjacent to the deviation correcting coupler 44; the deviation-rectifying screw rod 46 is installed on the deviation-rectifying screw rod support 45, and the deviation-rectifying motor 43 is in transmission connection with one end of the deviation-rectifying screw rod 46 through the deviation-rectifying coupler 44, so that the deviation-rectifying motor 43 can drive the deviation-rectifying screw rod 46 to rotate. The deviation correcting screw 46 further comprises a deviation correcting screw nut 461, the deviation correcting screw nut 461 is mounted at the other end of the deviation correcting screw 46 (i.e. the end far away from the deviation correcting coupler 44), and the rotation of the deviation correcting screw 46 can drive the deviation correcting screw nut 461 to move along the axial direction of the deviation correcting screw 46 according to the known screw working principle.

The deviation rectification carrier plate 47 is preferably rectangular flat and arranged parallel to the deviation rectification base plate 41, and has two connecting edges (not numbered) which are preferably parallel to each other; one of the connecting edges may be connected to the surface of the other side (e.g., the right side in fig. 2) of the driving base plate 21, and the deviation-correcting lead screw nut 461 may be connected to the other connecting edge of the deviation-correcting carrier plate 47, so that the deviation-correcting motor 43 and the deviation-correcting transfer plate 47 form a driving connection. Thus, when the lead screw nut 461 moves along the axial direction of the deviation correcting lead screw 46, the deviation correcting carrier plate 47 can drive the driving base plate 21 to move, and further drive the driving assembly 20, and the buffer assembly 30 and the clamping assembly 10 mounted on the driving assembly 20 to move along the axial direction of the deviation correcting lead screw 46 (if the viewing angle according to fig. 1 is along the direction perpendicular to the paper surface, if the viewing angle according to fig. 2 is along the direction parallel to the paper surface).

The deviation correcting slide mechanism 48 includes a deviation correcting slide plate 481, a deviation correcting slider 482 and a deviation correcting slide rail 483. The number of the deviation rectifying slide plate 481, the deviation rectifying slide block 482 and the deviation rectifying slide rail 483 is preferably two. The two deviation rectification sliding plates 481 can be flat plates, and are arranged in parallel with the deviation rectification transfer plate 47 and the deviation rectification base plate 41, and the deviation rectification carrier plate 47 can be fixedly connected with the two deviation rectification sliding plates 481 by means of, for example, bolt connection, riveting, welding, and the like. Two deviation rectification sliders 482 may be fixedly installed on the two deviation rectification sliding plates 481, respectively. The two deviation-correcting slide rails 483 can be mounted in parallel on the surface of the deviation-correcting base plate 41 facing the deviation-correcting carrier plate 47, and the two deviation-correcting sliders 482 can be slidably mounted on the two deviation-correcting slide rails 483, respectively. Thus, the deviation correcting carrier plate 47 can be slidably mounted on the deviation correcting base plate 41 by the deviation correcting sliding mechanism 48. When the deviation-correcting screw nut 461 drives the deviation-correcting carrier plate 47 to move along the axial direction of the deviation-correcting screw 46, the deviation-correcting carrier plate 47 can slide stably rather than move in the air under the support of the deviation-correcting sliding mechanism 48, which is beneficial to ensuring the stability and precision of movement.

The following describes a preferred operation of the tape pulling mechanism 100 by taking the example of pulling a separator used for manufacturing a battery, for example. It is understood that the tape pulling mechanism 100 may be used to pull other types of flexible tapes.

When the device works, firstly, the clamping jaw driver 12 is controlled to drive the clamping jaws 11 to firmly clamp the end part of the drawn diaphragm material belt; then, before the cell winding operation is performed, the main motor 23 is started, and the buffer assembly 30 and the clamping assembly 10 are driven to move in a predetermined manner (for example, away from a winding needle of the cell winding device) through the main coupler 24, the main screw rod 26 and the main screw rod nut 261, so that the diaphragm is pulled out in a predetermined direction by a predetermined length required for the cell winding operation, for example, a length required for winding one cell; when a cell winding operation is performed, the clamping assembly 10 may be driven to move in other predetermined manners (e.g., toward a winding needle of the cell winding apparatus) in accordance with the above-described transmission manner to transfer the separator to a position suitable for winding (e.g., onto the winding needle) to facilitate the winding operation. In the above working process, if the diaphragm clamped by the clamping assembly 10 generates tension fluctuation, the driving end of the buffer cylinder can correspondingly stretch and contract to reduce the influence of the tension fluctuation, and meanwhile, the buffer cylinder can also provide preset constant tension, so that the stability of the tension of the diaphragm can be ensured. On the other hand, if the position of the diaphragm deviates in the width direction, the deviation-correcting motor 43 can be started, and the driving assembly 20, the buffering assembly 30 and the clamping assembly 10 mounted on the driving assembly 20 are driven by the deviation-correcting coupler 44, the deviation-correcting screw 46, the deviation-correcting screw nut 461 and the deviation-correcting carrier plate 47 to move along the axial direction of the deviation-correcting screw 46 (if the viewing angle according to fig. 1 is the direction perpendicular to the paper surface, and if the viewing angle according to fig. 2 is the direction parallel to the paper surface), so as to correct the position deviation of the diaphragm in the width direction.

Referring to fig. 3, another preferred embodiment of the present application further provides a tape winding device 200, wherein the tape winding device 200 may include the tape pulling mechanism 100, the needle winding mechanism 50, and the unwinding mechanism 60 as described above.

The winding needle mechanism 50 may include a first winding needle 51 and a second winding needle 52. The first winding pin 51 and the second winding pin 52 are preferably disposed so as to be adjacent to each other and parallel to each other, so that the winding material to be wound can be sandwiched between the first winding pin 51 and the second winding pin 52. Further preferably, in the present embodiment, the first needle winding 51 and the second needle winding 52 may have a semi-cylindrical shape with the same size, and both have a semi-cylindrical outer side (not numbered in the figure) and a planar inner side (not numbered in the figure). In this embodiment, the inner side surface of the first winding needle 51 and the inner side surface of the second winding needle 52 may be aligned with each other, and the inner side surface of the first winding needle 51 and the inner side surface of the second winding needle 52 are arranged parallel to each other, close to each other, but not in contact with each other, and a slit 53 through which the tape can pass may be formed between the inner side surface of the first winding needle 51 and the inner side surface of the second winding needle 52; in this case, the outer side of the first winding needle 51 and the outer side of the second winding needle 52 face outward and are split into a substantially cylindrical surface, so that the first winding needle 51 and the second winding needle 52 together form a winding needle assembly (not numbered) having a substantially cylindrical outer contour and forming the slit 53 in a diametrical direction.

The unwinding mechanism 60 may be used to house a roll of material (e.g., a roll of separator material) needed to manufacture wound cells. In the present embodiment, the unwinding mechanism 60 and the tape drawing mechanism 100 may be preferably disposed at positions adjacent to both ends of the slit 53 formed between the first winding needle 51 and the second winding needle 52 of the winding needle mechanism 50, respectively, so that the end of the tape 70 paid out from the roll mounted on the unwinding mechanism 60 can pass through the slit 53 and then be fixed to the tape drawing mechanism 100, and can be drawn by the tape drawing mechanism 100. The unwinding mechanism 60 may preferably include a mounting member 61 and at least one auxiliary positioning member 62, the mounting member 61 may include, for example, a rotating shaft for rotatably mounting the roll thereon; the auxiliary positioning member 62 may be, for example, a roller for assisting in tensioning the tape 70 between the mounting member 61 and the tape pulling mechanism 100, and may also be used for changing the conveying direction of the tape 70. In the present embodiment, the auxiliary positioning member 62 is preferably disposed between the mounting member 61 and the needle winding mechanism 50.

Yet another preferred embodiment of the present application further provides a tape winding method, which can be performed by using the tape winding device 200 described above, and preferably includes the following steps:

s1, providing the strip of material 70 to be wound. The step may specifically include: a roll of material, such as a separator roll used in the manufacture of batteries, is rotatably mounted on the mounting member 61 of the unwinding mechanism 60, the strip of material 70 is paid out from the roll, and the strip of material 70 is then passed around the auxiliary positioning member 62 to achieve a predetermined tension and a desired draw direction for the strip of material 70.

S2, the tape 70 is fixed and pulled by the tape pulling mechanism 100. Preferably, the step S2 may include: the clamping jaws 11 are driven by the clamping jaw driver 12 to clamp the tape 70, and the main motor 23 is started to drive the buffer assembly 30 and the clamping assembly 10 to move in a predetermined manner through the main coupler 24, the main screw 26 and the main screw nut 261, so that the tape 70 is pulled out in a predetermined direction for a predetermined length required for a cell winding operation, for example, for winding one cell.

S3, the tape 70 is held by the needle winding mechanism 50. Preferably, the step S3 may include the following operations: the inner side of the first winding needle 51 is attached to one side of the material belt 70, and the first winding needle 51 is moved along a preset first direction (for example, a direction out of the vertical paper surface according to the view angle of fig. 3); the inner side surface of the second winding needle 52 is attached to the other side of the material tape 70, and the second winding needle 52 is moved along a predetermined second direction (for example, a direction inward from the vertical paper surface in the view of fig. 3), so that the first winding needle 51 and the second winding needle 52 are inserted into each other in parallel until the two ends of the first winding needle 51 and the second winding needle 52 are aligned with each other, so that the first winding needle 51 and the second winding needle 52 jointly constitute the aforementioned winding needle assembly, and the aforementioned slit 53 is formed between the inner side surface of the first winding needle 51 and the inner side surface of the second winding needle 12, and the material tape 70 is held in the slit 53.

S4: the tape 70 is pre-wound by the needle winding mechanism 50. Preferably, the step S4 may include: the first winding needle 51 and the second winding needle 52 are driven to rotate by, for example, an existing power mechanism (e.g., a motor), so that the winding needle assembly pre-winds the material strip 70 clockwise or counterclockwise for a preset number of turns. During the pre-winding process, the driving assembly 20 simultaneously drives the clamping assembly 10 and the clamped material tape 70 to move toward the needle winding mechanism 50, so that the material tape 70 can be wound on the needle winding assembly.

It is understood that the reference numbers of the above steps S1-S4 do not limit the specific execution order of the steps. The above steps S1-S4 can be performed in any order that is realistically achievable.

Compared with the prior art, the tape drawing mechanism 100, the tape winding device 200 and the tape winding method provided by the present application according to the above preferred embodiment can achieve the following advantages: (1) by adopting the above-mentioned driving assembly 20 and clamping assembly 10 to cooperate, the material strip can be stably clamped and drawn to perform stable linear movement, and the material strip can be accurately pulled out by a desired preset length, so that excellent positioning accuracy can be obtained, and the material strip can be suitable for winding of various specifications of battery cells, especially small-specification battery cells for small and miniature electronic devices such as bluetooth headsets. (2) Preferably adopt the motor as the power supply, the efficiency of conveying the material area is higher, has further improved the efficiency of electric core coiling operation. (3) The buffer assembly 30 can effectively reduce tension fluctuation of the material belt, so that the material belt can be conveyed under a preset constant tension, and the winding quality of the battery cell is further improved. (4) By adopting the deviation rectifying assembly 40, the position of the material belt can be corrected at any time in the width direction of the material belt, the positioning precision can be improved, and the winding quality of the battery cell can be improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present application and is not intended to limit the scope of the present application, which is defined by the appended claims and their equivalents, and all changes that can be made therein without departing from the spirit and scope of the invention.