CN117438667A - Winding equipment - Google Patents

Abstract

The present invention relates to a winding apparatus. The winding apparatus includes: the winding mechanism comprises a winding needle for winding the material belt, and the winding needle is provided with a slit for clamping the material belt; the cutting and pushing mechanism comprises a rolling assembly, a cutting assembly and a pushing assembly, wherein the rolling assembly, the cutting assembly and the pushing assembly can synchronously rotate around a winding needle, and the winding needle can controllably rotate around an axis of the winding needle; the rolling assembly is used for propping the material belt onto the winding needle, the cutting assembly is used for cutting the material belt by the downstream side of the rolling assembly, and the pushing assembly is used for propping the upstream cutting end of the material belt into the seam of the winding needle. Therefore, under the condition that the material belt does not stop conveying to the downstream, the cutting of the material belt is realized, the upstream cutting end of the material belt is pushed into the seam of the winding needle to be clamped and fixed, on one hand, the production efficiency is greatly improved, on the other hand, the needle penetrating and film combining actions are canceled, and the structure of the winding equipment is greatly simplified.

Description

Winding equipment

Technical Field

The invention relates to the technical field of battery manufacturing equipment, in particular to winding equipment.

Background

The cell is an important component of the battery and is made by winding rolls for each layer of material strips (for example, a separator, an anode pole piece, a separator and a cathode pole piece).

In the prior art, each layer of material belt is gathered through a film doubling mechanism and then enters a winding needle positioned at a first station for winding. The winding needle positioned at the first station is switched to the second station after winding one battery cell, and the other winding needle is switched to the first station. At this time, each layer of material belt passes through the first station after being gathered by the film doubling mechanism, and the winding needle positioned at the first station stretches out of the turret to complete the threading (namely, the material belt penetrates into the slit of the winding needle). Then, an inner clamping needle of the winding needle clamps the material tape, and then a cutter located between the first station and the second station cuts the material tape. Then, the winding needle at the first station starts winding the next cell. In summary, the operation process of the winding operation in the prior art is complex, which results in complex structure of the winding equipment and lower production efficiency.

Disclosure of Invention

Accordingly, it is necessary to provide a winding apparatus which improves the above-described drawbacks, in order to solve the problems of the prior art that the winding apparatus is complicated in structure and low in productivity due to the complicated operation process of the winding operation.

A winding apparatus comprising:

the winding mechanism comprises a winding needle for winding the material belt, and the winding needle is provided with a slit for clamping the material belt; and

The cutting pushing mechanism comprises a rolling assembly, a cutting assembly and a pushing assembly, wherein the rolling assembly, the cutting assembly and the pushing assembly can rotate around a winding needle, the winding needle can controllably rotate around an axis of the winding needle, the rolling assembly is used for propping a material belt onto the winding needle, the cutting assembly is used for cutting the material belt at the downstream side of the rolling assembly, and the pushing assembly is used for propping an upstream cutting end of the material belt into a crack of the winding needle.

In one embodiment, the angular speed of rotation of the winding needle around the axis of the winding needle is equal to the angular speed of rotation of the rolling assembly, the cutting assembly and the pushing assembly around the winding needle.

In one embodiment, the pushing assembly comprises a pushing driving piece and a pushing piece arranged on the pushing driving piece, the pushing piece is positioned between the cutting assembly and the rolling assembly, and the pushing driving piece can drive the pushing piece to be close to or far away from the winding needle;

when the cutting assembly cuts off the material belt, the pushing piece is opposite to the crack on the winding needle.

In one embodiment, the cutting and pushing mechanism further comprises a moving seat, and the rolling assembly, the cutting assembly and the pushing assembly are all arranged on the moving seat so as to be driven by the moving seat to rotate around the winding needle.

In one embodiment, the motion seat can also controllably drive the rolling assembly to approach or depart from the winding needle.

In one embodiment, the rolling assembly includes a first mounting seat, a pressing roller and a first elastic member, wherein the first mounting seat is movably connected to the moving seat, the pressing roller is connected to the first mounting seat in a unidirectional rotation manner, and the first elastic member abuts against the first mounting seat and the moving seat and is used for providing a pretightening force for enabling the first mounting seat to have a movement trend of driving the pressing roller to approach the winding needle.

In one embodiment, the cutting assembly comprises a cutting driving piece and a cutter, wherein the cutter is arranged at the driving end of the cutting driving piece; under the driving action of the cutting driving piece, the cutter approaches to or departs from the winding needle so as to cut off the material belt on the winding needle.

In one embodiment, the winding mechanism further comprises a clamping assembly provided on the winding needle for clamping or unclamping the strip of material entering the nip.

In one embodiment, the clamping assembly comprises a clamping block, a second elastic piece and an abutting block, the winding pin is provided with a clamping surface serving as a side wall of the clamping gap, the clamping block is arranged on the winding pin and can be close to or far away from the clamping surface relative to the winding pin, the abutting block is connected to the clamping block, and the second elastic piece is abutted between the winding pin and the clamping block and is used for providing elastic force for enabling the clamping block to press a material belt entering the clamping gap on the clamping surface;

The cutting and pushing mechanism further comprises a pushing component capable of rotating around the winding needle, and the pushing component is used for pushing the abutting block so as to drive the clamping block to be far away from the clamping surface.

In one embodiment, the pushing component comprises a pushing driving piece and a pushing roller, and the pushing roller is arranged at the driving end of the pushing driving piece; the abutting block is provided with an inclined surface which is angled to the moving direction of the clamping block;

the pushing driving piece can drive the pushing roller to push the abutting block to move through the inclined surface so as to convert the movement of the pushing roller into the movement of the abutting block and the clamping block away from the clamping surface.

In one embodiment, the clamping assembly comprises a first compression driver comprising a driver body and a telescoping end telescoping relative to the driver body; the driving piece body is arranged on the winding needle, the winding needle is provided with a clamping surface serving as the side wall of the clamping gap, and the telescopic end is opposite to the clamping surface, so that when the telescopic end stretches out relative to the driving piece body, a material belt entering the clamping gap can be pressed on the clamping surface.

In one embodiment, the clamping assembly comprises a second compression driving member and a clamping plate, the second compression driving member is mounted on the winding needle, the clamping plate is mounted on the driving end of the second compression driving member, the winding needle is provided with a clamping surface serving as the side wall of the clamping gap, and the clamping plate is opposite to the clamping surface, so that the clamping plate can compress the material belt entering the clamping gap on the clamping surface under the driving of the second compression driving member.

In one embodiment, the winding needle comprises a first inner needle and a second inner needle arranged in the slit, and the first inner needle and the second inner needle can be controlled to be close to or far away from each other; the clamping assembly comprises a first clamping plate and a second clamping plate, the first clamping plate is connected to the first inner needle, and the second clamping plate is connected to the second inner needle;

the first clamping plate and the second clamping plate can clamp or loosen the material belt entering the crack under the drive of the first inner needle and the second inner needle.

In one embodiment, the winding mechanism further comprises a turret and at least two winding needles arranged on the turret, the turret is rotatably arranged, each winding needle sequentially passes through a first station and a second station in the process of rotating along with the turret, and when the winding needle positioned at the first station rotates along with the turret to the second station, the other winding needle rotates along with the turret to the first station;

The rolling assembly is used for propping the material belt to the winding needle located at the first station in the process of rotating the winding needle located at the first station, the cutting assembly is used for cutting the material belt from the downstream side of the rolling assembly, and the pushing assembly is used for propping the upstream cutting end of the material belt to a crack of the winding needle located at the first station.

The above-mentioned winding device, in actual use, the material area is carried downstream with certain speed to the first station of passing by. The winding needle reaches the first station and rotates about its own axis. Meanwhile, the motion seat drives the rolling assembly, the cutting assembly and the pushing assembly to rotate around the winding needle located at the first station, and the rolling assembly presses the material belt to the winding needle located at the first station. At this time, the cutting assembly cuts off the material strip, and then the pushing component pushes against the upstream cut end of the material strip to the slit of the winding needle located at the first station, and the upstream cut end of the material strip in the slit is clamped and fixed, so that the winding needle located at the first station can wind the material strip.

Therefore, under the condition that the material belt does not stop conveying to the downstream, the cutting of the material belt is realized, the upstream cutting end of the material belt is pushed into the seam of the winding needle to be clamped and fixed, and the winding needle keeps rotating in the process, so that the production efficiency is greatly improved, the needle threading and film combining actions are canceled, and the structure of the winding equipment is greatly simplified.

Drawings

FIG. 1 is a schematic view of a winding apparatus according to an embodiment of the present invention;

fig. 2 to 4 are schematic views illustrating a process of cutting a material tape by a cutting and pushing mechanism of a winding apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic view showing the structure of a winding needle of a winding apparatus according to an embodiment of the present invention;

fig. 6 is a schematic view of the winding needle of the winding device according to another embodiment of the present invention (the second outer needle is omitted);

fig. 7 is a schematic view of the winding needle of the winding apparatus according to still another embodiment of the present invention (the second outer needle is omitted);

fig. 8 is a schematic view showing the structure of a winding needle of a winding apparatus according to still another embodiment of the present invention.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1, an embodiment of the present invention provides a winding apparatus including a winding mechanism 10 and a cutting and pushing mechanism 20. The winding mechanism 10 includes a winding needle 11 located at the first station a 1. The winding needle 11 has a nip 113 for holding the material tape b13, and the winding needle 11 is for winding the material tape b13. The cutting and pushing mechanism 20 comprises a moving seat 21, a rolling component 22, a cutting component 23 and a pushing component 24 which are all arranged on the moving seat 21. The motion seat 21 can rotate around the winding needle 11 at the first station a1 in a controlled way, so that the rolling assembly 22, the cutting assembly 23 and the pushing assembly 24 are driven to rotate around the winding needle 11 at the first station a 1. The winding needle 11 is controllably rotatable about its own axis, that is to say the winding needle 11 at the first station a1 rotates about its own axis, and the rolling assembly 22, the cutting assembly 23 and the pushing assembly 24 revolve around the winding needle 11 at the first station a 1. The rolling assembly 22 is used for pressing the material belt b13 against the winding needle 11 located at the first station a 1. The cutter assembly 23 is used to cut the web b13 from the downstream side of the roll assembly 22. The pushing assembly 24 is used to push the upstream cut end b131 of the web b13 into the nip 113 of the winding pin 11 at the first station a 1.

It should be noted that, the rolling assembly 22, the cutting assembly 23 and the pushing assembly 24 may be integrally mounted on the moving seat 21, and driven by the moving seat 21 to synchronously rotate around the winding needle 11, which is beneficial to simplifying the structure of the apparatus. In other embodiments, the rolling assembly 22, the cutting assembly 23 and the pushing assembly 24 may be respectively mounted on different moving components, and the rolling assembly 22, the cutting assembly 23 and the pushing assembly 24 are respectively driven to rotate around the winding needle 11 by the different moving components, so long as the rolling assembly 22, the cutting assembly 23 and the pushing assembly 24 can synchronously rotate around the winding needle 11, which is not limited herein.

For ease of description, the rolling assembly 22, the cutting assembly 23 and the pushing assembly 24 are described herein as being integrally mounted on the motion base 21.

In practical use, as shown in fig. 2, the web b13 is conveyed downstream at a certain speed and passes through the first station a1. The winding needle 11 reaches the first station a1 and rotates about its own axis. At the same time, the moving seat 21 drives the rolling assembly 22, the cutting assembly 23 and the pushing assembly 24 to rotate around the winding needle 11 at the first station a1, and the rolling assembly 22 presses the material belt b13 against the winding needle 11 at the first station a1. Referring to fig. 3 and 4, the cutting assembly 23 cuts the material belt b13, the pushing assembly 24 pushes the upstream cut end b131 of the material belt b13 into the slit 113 of the winding needle 11 located at the first station a1, and the upstream cut end b131 of the material belt b13 in the slit 113 is clamped and fixed, so that the winding needle 11 located at the first station a1 can wind the material belt b 13.

In this way, under the condition that the material belt b13 does not stop conveying downstream, the cutting of the material belt b13 is realized, the upstream cutting end b131 of the material belt b13 is pushed into the slit 113 of the winding needle 11 to be clamped and fixed, and the winding needle 11 keeps rotating in the process, so that the production efficiency is greatly improved, the needle threading and film merging actions are canceled, and the structure of the winding equipment is greatly simplified.

It should be noted that, in the prior art, the tape b13 is cut at a position between the first station a1 and the second station a2 (see fig. 1), so that the length of the tape b13 between the position where the winding needle 11 of the first station a1 holds the tape b13 and the position where the tape b13 is cut is long, and the length of the tape b13 does not increase the cell capacity, thereby wasting the tape b 13. In contrast, in the present application, the cutting assembly 23 cuts the material tape b13 at the winding needle 11 located at the first station a1, and pushes the upstream cutting end b131 of the material tape b13 formed after cutting into the slit 113 of the winding needle 11 to clamp and fix, so that the length of the ineffective material tape b13 is greatly shortened, and the waste of the material tape b13 is avoided.

It will be appreciated that after the cutting assembly 23 cuts the passing web b13, the upstream cutting end b131 located at the upstream and the downstream cutting end b131 located at the downstream are formed at the cut of the web b13, and the downstream cutting end is separated from the upstream cutting end b131 as the downstream web is conveyed downstream, so that the upstream cutting end 131 is kept at the slit 113 of the winding needle 11 under the pressing action of the rolling assembly 22 on the web b13, and is further pushed into the slit 113 of the winding needle 11 located at the first station a1 by the pushing assembly 24 to be clamped and fixed, so that the winding needle 11 located at the first station a1 can wind the web b 13.

In particular, in the embodiment, the angular speed of the rotation of the winding needle 11 around the axis thereof is equal to the angular speed of the movement seat 21 driving the rolling assembly 22, the cutting assembly 23 and the pushing assembly 23 to rotate around the winding needle 11, so as to ensure that the rolling assembly 22, the cutting assembly 23, the pushing assembly 24, the winding needle 11 positioned at the first station a1 and the material belt b13 remain relatively static in the rotation direction, further ensure that the cutting assembly 23 fly-cuts the material belt b13, and the pushing assembly 24 can accurately push the upstream cutting end b131 of the material belt b13 into the seam 113 of the winding needle 11.

In the embodiment of the present application, the moving seat 21 may further controllably drive the moving seat 21 to approach or depart from the winding needle 11 located at the first station a1, so as to drive the rolling assembly 22 to approach or depart from the winding needle 11 located at the first station a1, so that the rolling assembly 22 presses the material belt b13 against the winding needle 11 or releases the material belt b13 on the winding needle 11. When the winding needle 11 reaches the first station a1 and rotates around its own axis, the moving seat 21 moves toward the winding needle 11, so as to drive the rolling assembly 22 to gradually approach the winding needle 11 until the rolling assembly 22 presses the material belt b13 against the winding needle 11. Then, the moving seat 21 rotates around the winding needle 11, so that the rolling assembly 22, the pushing assembly 24 and the cutting assembly 23 are driven to rotate around the winding needle 11 together. At this time, the cutter assembly 23 and the pusher assembly 24 are kept stationary with respect to the tape b13 and the winding needle 11, and the cutter assembly 23 cuts the tape b13, that is, fly-cutting the tape b13 is realized. Then, the pushing assembly 24 pushes the upstream cut end b131 of the tape b13 into the slit 113 of the winding needle 11 to clamp and fix, so that the winding needle 11 can wind the tape b13. Then, the moving seat 21 moves away from the winding needle 11 at the first station a1, so as to drive the rolling assembly 22, the pushing assembly 24 and the cutting assembly 23 away from the winding needle 11.

The movement of the moving seat 21 to approach the winding needle 11 located at the first station a1 and the rotation about the winding needle 11 located at the first station a1 may be performed separately or simultaneously, and are not limited herein.

It should be further noted that the cam driving mechanism may be used to drive the motion seat 21 to move, so that the motion seat 21 approaches the winding needle 11 located at the first station a1, rotates around the winding needle 11, and finally moves away from the winding needle 11. The cam mechanism may be of a more sophisticated prior art, and is not limited herein.

Referring to fig. 2, in an embodiment, the rolling assembly 22 includes a first mounting base 221, a pressing roller 222, and a first elastic member 223. The first mount 221 is movably connected to the motion base 21. The pressing roller 222 is unidirectionally rotatably coupled to the first mounting base 221. The first elastic member 223 is abutted between the first mounting seat 221 and the moving seat 21, and is used for providing a pretightening force for enabling the first mounting seat 221 to have a movement trend of driving the pressing roller 222 to approach the winding needle 11 located at the first station a 1. In this way, when the moving seat 21 gradually approaches the winding needle 11 located at the first station a1, the pressing roller 222 is driven to gradually approach the winding needle 11 until the pressing roller 222 presses the material belt b13 against the winding needle 11. As the moving seat 21 continues to approach the winding needle 11, the first elastic member 223 is further compressed, and the pressing roller 222 presses the material belt b13 against the winding needle 11 under the pre-tightening force provided by the first elastic member 223. Alternatively, the first elastic member 223 may employ a spring.

Alternatively, the pressing roller 222 is mounted on the first mounting seat 221 through a one-way bearing, so that the pressing roller 222 can only rotate in one direction with respect to the first mounting seat 221. In the embodiment shown in fig. 2, the pressing roller 222 can rotate only in the clockwise direction, and the winding needle 11 rotates around its own axis in the counterclockwise direction, thereby conveying the material belt b13 downward.

The first elastic member 223 is provided to ensure that the pressing roller 222 elastically abuts against the winding needle 11, so as to avoid hard impact on the material tape b13 or the winding needle 11 and press the material tape b13 or the winding needle 11; on the other hand, the winding needle 11 with different sizes and the material belt b13 with different thickness specifications can be compatible, and the compatibility of winding equipment is improved.

It should be noted that, since the pressing roller 222 can only rotate unidirectionally, when the pressing roller 222 presses the material belt b13 against the winding needle 11, the material belt b13 between the pressing roller 222 and the winding needle 11 can only move downstream but not move upstream, so that the upstream cutting end b131 of the material belt b13 is prevented from rebounding upstream along with the upstream material belt b13 under tension after the cutting assembly 23 cuts the material belt b 13.

In particular embodiments, the pusher assembly 24 includes a pusher 242. When the cutter assembly 23 cuts the web b13 (at this time, the winding needle 11 is kept rotating about its own axis, and the moving seat 21 drives the rolling assembly 22, the cutter assembly 23 and the pushing assembly 24 to rotate about the winding needle 11), the pusher 242 is opposite to the slit 113 on the winding needle 11 at the first station a1, so that the pusher 242 pushes the upstream cut end b131 of the web b13 into the slit 113 of the winding needle 11.

Further, the pushing member 242 is located between the rolling member 22 and the cutting member 23, so that the rolling member 22 presses the material tape b13 on the upstream side of the pushing member 242, and the cutting member 23 cuts the material tape b13 on the downstream side of the pushing member 242, so that the upstream cut end b131 of the material tape b13 is located between the pushing member 242 and the slit 113 of the winding needle 11, and it is ensured that the pushing member 242 can accurately push the upstream cut end b131 of the material tape b13 into the slit 113 of the winding needle 11.

Further, the pushing assembly 24 further comprises a pushing driving member 241, and the pushing driving member 241 is mounted on the motion base 21. A pusher 242 is mounted at the driving end of the pusher 241. Under the driving action of the pushing driving piece 241, the pushing piece 242 approaches or departs toward the winding needle 11 located at the first station a1, so as to push the upstream cutting end b131 of the material belt b13 into the nip 113 of the winding needle 11 located at the first station a 1. Alternatively, the pushing driving member 241 may be a linear driving member such as an air cylinder, an electric cylinder, or a ball screw module, which is not limited herein, as long as the pushing driving member 242 can be driven to complete the pushing operation.

In particular embodiments, the cutting assembly 23 includes a cutting drive 231 and a cutter 232. The cutting driving member 231 is mounted on the moving base 21, and the cutter 232 is mounted at the driving end of the cutting driving member 231. The cutter 232 is moved toward or away from the winding needle 11 at the first station a1 by the driving of the cutting driving member 231 to cut off the material tape b13 on the winding needle 11 at the first station a 1. Alternatively, the cutting driving member 231 may be a linear driving member such as an air cylinder, an electric cylinder, or a ball screw module, so long as the cutting blade 232 can be driven to perform the cutting operation, which is not limited herein. The cutter 232 may be a heating wire or a resistance wire, so that the cutting of the material tape b13 is achieved in a hot cutting manner.

Referring to fig. 5, in an embodiment of the present application, the winding mechanism 10 further includes a clamping assembly 114. The clamping assembly 114 is arranged on the winding needle 11 to clamp or unclamp the material strip b13 into the nip 113. In this way, when the pusher 242 pushes the upstream cut end b131 of the tape b13 into the slit 113 of the winding needle 11, the clamping assembly 114 clamps the upstream cut end b131 of the tape b13, thereby achieving fixation of the upstream cut end b131 of the tape b13 and the winding needle 11. When the clamping assembly 114 clamps the upstream cut end b131 of the web b13, the winding needle 11 rotates to enable winding of the web b13.

In some embodiments, the clamping assembly 114 includes a clamp block 1141, a second resilient member 1142, and an abutment block 1143. The winding pin 11 has a clamping surface 1131 that serves as a side wall of the nip 113. The clamp block 1141 is disposed on the winding needle 11 and can be moved toward or away from the clamping surface 1131 with respect to the winding needle 11. The abutment block 1143 is connected to the clamp block 1141 to move with the clamp block 1141. The second elastic member 1142 abuts between the winding pin 11 and the clamp block 1141, for providing an elastic force for the clamp block 1141 to press the material tape b13 entering the nip 113 against the clamping surface 1131.

The cutting and pushing mechanism 20 further comprises a pushing component 25 mounted on the moving seat 21, so that the pushing component 25 rotates around the winding needle 11 located at the first station a1 under the driving of the moving seat 21. During the rotation of the winding needle 11 at the first station a1 around its own axis and the rotation of the moving seat 21 around the winding needle 11 at the first station a1, the pushing component 25 can push the abutment block 1143, so that the abutment block 1143 drives the clamping block 1141 to be away from the clamping surface 1131. In this way, the motion seat 21 drives the pressing roller 222 to press the material belt b13 against the winding needle 11 located at the first station a1, and rotates around the winding needle 11 located at the first station a 1. In the process that the motion seat 21 rotates around the winding needle 11 located at the first station a1 and the winding needle 11 located at the first station a1 also rotates around its own axis, firstly, the cutter 232 cuts off the material belt b13, and the pushing component 25 pushes the pushing block 1143, so as to drive the clamping block 1141 to be away from the clamping surface 1131. The pusher 242 then pushes the upstream cut end b131 of the web b13 into the nip 113 such that the upstream cut end b131 of the web b13 enters between the clamp block 1141 and the clamping surface 1131. Then, the pushing assembly 25 is separated from the abutting block 1143, so that the clamping block 1141 moves toward the clamping surface 1131 under the action of the second elastic member 1142 until the upstream cut end b131 of the web b13 is pressed and fixed on the clamping surface 1131. Finally, the moving seat 21 drives the rolling assembly 22, the pushing assembly 24, the cutting assembly 23 and the pushing assembly 25 to be far away from the winding needle 11. Alternatively, the second elastic member 1142 may employ a spring.

Further, the pushing component 25 includes a pushing driving member and a pushing roller, the pushing driving member is mounted on the motion seat 21, and the pushing roller is mounted on the driving end of the pushing driving member. The pushing driving member can drive the pushing roller to approach or separate from the abutment block 1143. The abutment block 1143 has an inclined surface c which is inclined with respect to the moving direction of the clamp block 1141. The pushing driving member can drive the pushing roller to move against the abutment block 1143 through the inclined surface c, so as to convert the linear motion of the pushing roller into the linear motion of the clamping block 1141 away from the clamping surface 1131.

In the embodiment shown in fig. 5, in the process that the motion seat 21 rotates around the winding needle 11 located at the first station a1, and the winding needle 11 located at the first station a1 rotates around its own axis, the pushing driving member drives the pushing roller to move rightward, and pushes the pushing block 1143 through the inclined plane c, so that the pushing block 1143 moves downward, and the pushing block 1143 drives the clamping block 1141 to move downward and away from the clamping surface 1131. When the upstream cutting end b131 of the material belt b13 is pushed into the nip 113 by the pushing member 242, the pushing driving member drives the pressing roller to move leftwards, so that the pressing roller is separated from the pressing block 1143, and the clamping block 1141 moves upwards under the action of the second elastic member 1142, so that the clamping block 1141 presses the upstream cutting end b131 of the material belt b13 against the clamping surface 1131.

Alternatively, the pushing driving member may be a linear driving member such as an air cylinder, an electric cylinder, or a ball screw module, which is not limited herein, so long as the pushing driving member can drive the pushing roller to push the abutment block 1143.

Optionally, the winding needle 11 comprises a rotating hub, a first outer needle 111, a second outer needle 112. The rotary needle holder is controllably rotated, and the first and second outer needles 111 and 112 are mounted on the rotary needle holder opposite to each other with a space therebetween, so that the rotary needle holder can rotate the first and second outer needles 111 and 112 when rotated to wind the tape b13 onto the first and second outer needles 111 and 112. The slit 113 is formed between the first outer needle 111 and the second outer needle 112. The side surface of the first outer needle 111 facing the second outer needle 112 is the clamping surface 1131, or the side surface of the second outer needle 112 facing the first outer needle 111 is the clamping surface 1131. Of course, in other embodiments, the slit 113 may be a groove formed on the outer surface of the winding pin 11, which is not limited herein.

It should be noted that the clamping assembly 114 is not limited to the above embodiment. In other embodiments, referring to FIG. 6, the clamping assembly 114 includes a first compression driver 1144, the first compression driver 1144 including a driver body and a telescoping end telescoped with respect to the driver body. The driving member body is mounted on the winding needle 11, and the telescopic end is opposite to the clamping surface 1131, so that when the telescopic end extends out relative to the driving member body, the material belt b13 entering the clamping gap 113 can be pressed against the clamping surface 1131. Alternatively, the first compression driver 1144 may employ an air cylinder.

Further, the pushing member 242 is provided with a relief groove 2421 corresponding to the telescopic end of the first pressing driving member 1144. When the pushing member 242 pushes the upstream cut end b131 of the tape b13 into the slit 113 of the winding needle 11, the avoiding groove 2421 is used for avoiding the telescopic end, so that the pushing member 242 is ensured to push the upstream cut end b131 of the tape b13 between the telescopic end and the clamping surface 1131, and interference of the telescopic end to pushing motion of the pushing member 242 is avoided.

Alternatively, the number of first pressing drivers 1144 may be plural, and the plural first pressing drivers 1144 may be disposed at intervals along the axial direction of the winding needle 11. In this way, the upstream cut end b131 of the material web b13 entering the nip 113 is commonly pinched by the telescoping ends of the plurality of first pinching drivers 1144. In the embodiment shown in fig. 6, the number of first pressing drivers 1144 is 4.

It should be noted that the clamping assembly 114 is not limited to the above embodiment. In other embodiments, referring to fig. 7, the clamping assembly includes a second compression driver 1145 and a clamping plate 1146. The second pressing driver 1145 is mounted on the winding needle 11, and the clamping plate 1146 is mounted on the driving end of the second pressing driver 1145. The clamping plate 1146 is opposite to the clamping surface 1131, so that the clamping plate 1146 can press the material strip b13 entering the nip 113 against the clamping surface 1131 under the driving of the second pressing driving member 1145. Thus, after the pushing member 242 pushes the upstream cut end b131 of the tape b13 into the nip 113 of the winding needle 11, the second pressing driving member 1145 drives the clamping plate 1146 toward the clamping surface 1131 until the clamping plate 1146 presses the upstream cut end b131 of the tape b13 against the clamping surface 1131. Alternatively, the second compression driver 1145 may employ an air cylinder.

Further, the clamping assembly 114 also includes a third resilient member 1147. The third elastic member 1147 abuts between the winding needle 11 and the clamping plate 1146 to provide a pre-tightening force that causes the clamping plate 1146 to have a movement tendency toward the clamping surface 1131. Thus, after the pushing member 242 pushes the upstream cut end b131 of the tape b13 into the nip 113 of the winding needle 11, the second pressing driving member 1145 drives the clamping plate 1146 toward the clamping surface 1131 until the clamping plate 1146 presses the upstream cut end b131 of the tape b13 against the clamping surface 1131. At this time, the third elastic member 1147 presses the clamping plate 1146 against the clamping surface 1131, thereby improving the stability of pressing the upstream cut end b131 of the tape b 13. Alternatively, the third elastic member 1147 may employ a spring.

Alternatively, the number of second compression drivers 1145 may be plural, the plural second compression drivers 1145 being disposed at intervals along the axial direction of the winding needle 11, and the clamping plates 1146 being connected to the driving ends of the respective second compression drivers 1145. In this manner, the clamping plates 1146 are simultaneously driven toward and away from the clamping surface 1131 by the respective second pressing driving members 1145 to clamp or unclamp the upstream cut end b131 of the web b13 entering the nip 113. In particular, in the embodiment shown in fig. 7, the number of second pinch drivers 1145 is four.

Alternatively, the number of the third elastic members 1147 may be plural, and the plural third elastic members 1147 may be arranged at intervals in the axial direction of the winding needle 11. In particular, in the embodiment of fig. 7, the number of third elastic members 1147 is two.

It should be noted that the clamping assembly 114 is not limited to the above embodiment. In other embodiments, referring to fig. 8, the winding needle 11 further includes a first inner needle 115 and a second inner needle 116 disposed within the pinch 113. The first inner needle 115 and the second inner needle 116 are controllably moved toward and away from each other. The clamping assembly 114 includes a first clamp plate 1148 and a second clamp plate 1149. The first clamp plate 1148 is attached to the first inner needle 115 and the second clamp plate 1149 is attached to the second inner needle 116. The first clamping plate 1148 and the second clamping plate 1149 can clamp or unclamp the tape b13 entering the nip 113 under the driving of the first inner needle 115 and the second inner needle 116. In this way, the first inner needle 115 and the second inner needle 116 of the winding needle 11 drive the first clamping plate 1148 and the second clamping plate 1149 to clamp and fix the upstream cutting end b131 of the material tape b13 entering the nip 113, which is beneficial to simplifying the structure of the winding needle 11.

It will be appreciated that the first outer needle 111 and the second outer needle 112 are each provided with a push rod 118. The two push rods 118 are respectively connected with the first inner needle 115 and the second inner needle 116 in a transmission way, so that the two push rods 118 can respectively drive the first inner needle 115 and the second inner needle 116 to be close to each other under the action of external force, and then the first inner needle 115 and the second inner needle 116 respectively drive the first clamping plate 1148 and the second clamping plate 1149 to be close to each other so as to clamp the upstream cutting end b131 of the material belt b13. When the external force on the two push rods 118 disappears, the two push rods 118 can respectively drive the first inner needle 115 and the second inner needle 116 to separate from each other, and then the first inner needle 115 and the second inner needle 116 respectively drive the first clamping plate 1148 and the second clamping plate 1149 to separate from each other so as to release the upstream cutting end b131 of the material belt b13.

It should be noted that, the assembly structure between the two push rods 118, the first outer needle 111, the second outer needle 112, the first inner needle 115 and the second inner needle 116 may be a relatively mature prior art, which is not limited herein.

With continued reference to fig. 1, in the embodiment of the present application, the winding mechanism 10 further includes a turret 12 and at least two winding pins 11 disposed on the turret 12. The turret 12 is rotatably arranged, and each winding needle 11 sequentially passes through the first station a1 and the second station a2 during rotation of the turret 12. When the winding pin 11 located at the first station a1 rotates with the turret 12 to the second station a2, the other winding pin 11 rotates with the turret 12 to the first station a1.

When the winding of the battery cell on the winding needle 11 at the first station a1 is completed, the turret 12 drives the winding needle 11 at the first station a1 to rotate to the second station a2 without stopping the downstream conveyance of the tape b13, and the other winding needle 11 rotates to the first station a1 along with the turret 12. At this time, the winding needle 11 at the first station a1 rotates around its own axis, the moving seat 21 rotates synchronously around the winding needle 11 at the first station a1, the rolling assembly 22 presses the material belt b13 against the winding needle 11 at the first station a1, the cutter 232 of the cutting assembly 23 cuts the material belt b13, the pushing piece 242 of the pushing assembly 24 pushes the upstream cutting end b131 of the material belt b13 against the slit 113 of the winding needle 11 at the first station a1, and the upstream cutting end b131 of the material belt b13 in the slit 113 is clamped and fixed by the clamping assembly 114, so that the winding needle 11 at the first station a1 winds the material belt b 13. At this time, the winding needle 11 located at the second station a2 continues to wind until all the cut material tape b13 is wound around the battery cell, and then the battery cell located at the winding needle 11 at the second station a2 is subjected to actions such as adhesive sticking and/or blanking.

In particular embodiments, the winding apparatus further includes a first unwind mechanism, a second unwind mechanism, a third unwind mechanism, a fourth unwind mechanism, a first tab mechanism 30, and a second tab mechanism 40.

The first unwinding mechanism is used for outputting a first diaphragm b1 to the first station a1, the second unwinding mechanism is used for outputting a first pole piece material belt b2 to the first station a1, the third unwinding mechanism is used for outputting a second diaphragm b3 to the first station a1, and the fourth unwinding mechanism is used for outputting a second pole piece material belt b4 to the first station a 1. The first tab mechanism 30 is disposed between the second unwind mechanism and the first station a 1. The first tab mechanism 30 is configured to cut off the first pole piece material belt b2 passing through, and send the start end of the first pole piece material belt b2 to the winding needle 11 located at the first station a1, so that the winding needle 11 located at the first station a1 can wind the first pole piece material belt b2 when rotating. The second tab mechanism 40 is disposed between the fourth unwind mechanism and the first station a 1. The second tab mechanism 40 is used for cutting off the second pole piece material belt b4 passing through, and sending the initial end of the second pole piece material belt b4 to the winding needle 11 at the first station a1, so that the winding needle 11 at the first station a1 can wind the second pole piece material belt b4 when rotating.

In this way, the first unreeling mechanism, the second unreeling mechanism, the third unreeling mechanism and the fourth unreeling mechanism unreels and outputs the first diaphragm b1, the first pole piece material belt b2, the second diaphragm b3 and the second pole piece material belt b4 to the reeling needle 11 positioned at the first station a1, respectively. The winding needle 11 at the first station a1 rotates to wind the first diaphragm b1, the first pole piece material belt b2, the second diaphragm b3 and the second pole piece material belt b4 to form a battery cell.

When the winding of the battery cell on the winding needle 11 at the first station a1 is completed, first, the first tab mechanism 30 cuts off the first pole piece material tape b2 routed therethrough, and the second tab mechanism 40 cuts off the second pole piece material tape b4 routed therethrough. Then, the turret 12 rotates until the winding needle 11 located at the first station a1 is brought to the second station a2, and the other winding needle 11 reaches the first station a1 and rotates around its own axis. At the same time, the moving seat 21 drives the pressing roller 222 of the rolling assembly 22 to press the passing material belt b13 (namely the first diaphragm b1 and the second diaphragm b 3) against the winding needle 11 positioned at the first station a1, and synchronously rotates around the winding needle 11 positioned at the first station a 1. Then, the cutter 232 of the cutting assembly 23 cuts the material tape b13 (i.e., the first separator b1 and the second separator b 3), and the pushing piece 242 of the pushing assembly 24 pushes the upstream cut end b131 of the cut material tape b13 (i.e., the upstream cut end of the first separator b1 and the upstream cut end of the second separator b 3) into the slit 113 of the winding needle 11 located at the first station a1, so that the upstream cut end b131 of the material tape b13 (i.e., the upstream cut end of the first separator b1 and the second separator b 3) in the slit 113 is clamped and fixed by the clamping assembly 114, so that the winding needle 11 located at the first station a1 winds the material tape b13 (i.e., the first separator b1 and the second separator b 3).

Then, the first tab mechanism 30 inserts the start end of the first pole piece material tape b2 between the first diaphragm b1 and the second diaphragm b3, so that the first pole piece material tape b2 is wound onto the winding needle 11 located at the first station a1 along with the first diaphragm b1 and the second diaphragm b 3. Meanwhile, the second tab mechanism 40 also inserts the start end of the second pole piece material belt b4 between the second diaphragm b3 and the winding needle 11 located at the first station a1, so that the second pole piece material belt b4 is wound onto the winding needle 11 located at the first station a1 along with the second diaphragm b 3. At this time, the winding needle 11 located at the first station a1 winds the first diaphragm b1, the first pole piece material belt b2, the second diaphragm b3 and the second pole piece material belt b4 simultaneously, so as to form the battery cell.

In the above process, when the cutter 232 of the cutting assembly 23 cuts the material tape b13 (i.e., the first separator b1 and the second separator b 3), the winding needle 11 at the second station a2 continues to wind until all of the cut first separator b1 and second separator b3 are wound around the battery cell. Then, the battery core positioned on the winding needle 11 of the second station a2 is subjected to actions such as tail adhesive pasting and/or blanking.

It should be noted that the winding operation step described above is only one embodiment. Of course, in other embodiments, other winding steps may be used, as long as the winding of the formed cells is possible, and the present invention is not limited thereto.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (14)

1. A winding apparatus, characterized by comprising:

the winding mechanism comprises a winding needle for winding the material belt, and the winding needle is provided with a slit for clamping the material belt; and

The cutting pushing mechanism comprises a rolling assembly, a cutting assembly and a pushing assembly, wherein the rolling assembly, the cutting assembly and the pushing assembly can rotate around the axis of the rolling assembly in a controlled manner, the rolling assembly, the cutting assembly and the pushing assembly can rotate around the rolling needle, the rolling assembly is used for propping a material belt onto the rolling needle, the cutting assembly is used for cutting the material belt at the downstream side of the rolling assembly, and the pushing assembly is used for propping an upstream cutting end of the material belt into a crack of the rolling needle.

2. The winding device according to claim 1, wherein the angular speed of rotation of the winding needle about its own axis is equal to the angular speed of rotation of the rolling assembly, the cutting assembly and the pushing assembly about the winding needle.

3. The winding apparatus according to claim 1, wherein the pushing assembly comprises a pushing drive and a pushing member disposed on the pushing drive, the pushing member being located between the cutting assembly and the rolling assembly, the pushing drive being capable of driving the pushing member toward or away from the winding needle;

when the cutting assembly cuts off the material belt, the pushing piece is opposite to the crack on the winding needle.

4. The winding apparatus of claim 1, wherein the cutting and pushing mechanism further comprises a motion seat, and the rolling assembly, the cutting assembly, and the pushing assembly are all disposed on the motion seat to be rotated about the winding needle by the motion seat.

5. The winding device according to claim 4, wherein said motion seat is further controllable to bring said rolling assembly closer to or farther from said winding needle.

6. The winding apparatus according to claim 4, wherein the roller assembly comprises a first mount movably connected to the motion seat, a pressing roller unidirectionally rotatably connected to the first mount, and a first elastic member abutting between the first mount and the motion seat for providing a biasing force such that the first mount has a motion tendency to drive the pressing roller toward the winding needle.

7. The winding apparatus of claim 1, wherein the cutting assembly comprises a cutting drive and a cutter, the cutter being mounted at a drive end of the cutting drive; under the driving action of the cutting driving piece, the cutter approaches to or departs from the winding needle so as to cut off the material belt on the winding needle.

8. The winding apparatus of claim 1, wherein the winding mechanism further comprises a clamping assembly disposed on the winding needle for clamping or unclamping the web entering the nip.

9. The winding apparatus according to claim 8, wherein the clamping assembly includes a clamp block, a second elastic member, and an abutment block, the winding pin having a clamping surface as a side wall of the nip, the clamp block being provided on the winding pin and being capable of approaching or moving away from the winding pin toward the clamping surface, the abutment block being connected to the clamp block, the second elastic member being abutted between the winding pin and the clamp block for providing an elastic force for the clamp block to press a material tape entering the nip against the clamping surface;

the cutting and pushing mechanism further comprises a pushing component capable of rotating around the winding needle, and the pushing component is used for pushing the abutting block so as to drive the clamping block to be far away from the clamping surface.

10. The winding apparatus according to claim 9, wherein the pushing assembly includes a pushing driving member and a pushing roller mounted at a driving end of the pushing driving member; the abutting block is provided with an inclined surface which is angled to the moving direction of the clamping block;

the pushing driving piece can drive the pushing roller to push the abutting block to move through the inclined surface so as to convert the movement of the pushing roller into the movement of the abutting block and the clamping block away from the clamping surface.

11. The winding apparatus of claim 8, wherein the clamping assembly includes a first compression drive including a drive body and a telescoping end telescoping relative to the drive body; the driving piece body is arranged on the winding needle, the winding needle is provided with a clamping surface serving as the side wall of the clamping gap, and the telescopic end is opposite to the clamping surface, so that when the telescopic end stretches out relative to the driving piece body, a material belt entering the clamping gap can be pressed on the clamping surface.

12. The winding apparatus of claim 8, wherein the clamping assembly includes a second compression drive mounted on the winding pin and a clamping plate mounted on the drive end of the second compression drive, the winding pin having a clamping surface that acts as a side wall of the nip, the clamping plate being opposite the clamping surface such that the clamping plate is capable of compressing a strip of material entering the nip against the clamping surface under the drive of the second compression drive.

13. The winding device according to claim 8, characterized in that the winding needle comprises a first and a second inner needle arranged in the nip, which are controllable to be moved towards or away from each other; the clamping assembly comprises a first clamping plate and a second clamping plate, the first clamping plate is connected to the first inner needle, and the second clamping plate is connected to the second inner needle;

the first clamping plate and the second clamping plate can clamp or loosen the material belt entering the crack under the drive of the first inner needle and the second inner needle.

14. The winding apparatus according to any one of claims 1 to 13, wherein said winding mechanism further comprises a turret and at least two of said winding pins provided on said turret, said turret being rotatably provided, each of said winding pins being sequentially routed through a first station and a second station during rotation with said turret, and when said winding pin at said first station is rotated with said turret to said second station, the other of said winding pins is rotated with said turret to said first station;

the rolling assembly is used for propping the material belt to the winding needle located at the first station in the process of rotating the winding needle located at the first station, the cutting assembly is used for cutting the material belt from the downstream side of the rolling assembly, and the pushing assembly is used for propping the upstream cutting end of the material belt to a crack of the winding needle located at the first station.