CN114744277A - Winding device and winding method - Google Patents

Abstract

The invention discloses a winding device and a winding method. The winding mechanism comprises a turret, three groups of needle winding mechanisms are arranged on the turret and respectively correspond to a winding station, a gluing station and a blanking station, and a motor needle opening assembly, a needle closing assembly and a needle opening and closing adjusting assembly are further arranged on the turret; the motor needle opening assembly is arranged at a winding station and drives the needle winding mechanism to clamp the material belt; the needle closing assembly is arranged at a blanking station and drives the needle rolling mechanism to loosen the material belt; the outer surface of the needle rolling mechanism is provided with a first adjusting assembly matched with the opening and closing needle adjusting assembly, and the opening and closing needle adjusting assembly is arranged at a blanking station and is matched with the first adjusting assembly to adjust the perimeter of the needle rolling mechanism. The winding device and the winding method can ensure the working efficiency and improve the winding precision of the battery cell.

Description

Winding device and winding method

Technical Field

The invention belongs to the field of lithium battery automation equipment, and particularly relates to a winding device and a winding method.

Background

The production of the battery core is to wind the positive plate material belt, the negative plate material belt and the diaphragm material belt in sequence to form a winding body, and the tab is a metal conductor which leads the positive and negative electrodes out of the battery core. Due to the difference of welding or shearing precision of the tabs, the tabs of the wound battery cell may have a dislocation condition, and further the quality of the battery cell is affected, so the winding equipment needs to be provided with a winding needle mechanism capable of changing the circumference of the winding needle.

The circumference of a winding needle can be changed by the winding needle mechanism adopted at present, but most of structures are complex, and the adjustment of the circumference of the winding needle is inconvenient.

Disclosure of Invention

The invention aims to provide a winding device with simple structure and a winding method for conveniently adjusting the circumference of a winding needle.

In order to achieve the purpose, the needle winding mechanism comprises a turret, wherein three needle winding mechanisms are arranged on the turret and respectively correspond to a winding station, a gluing station and a blanking station, and a motor needle opening assembly, a needle closing assembly and a needle opening and closing adjusting assembly are further arranged on the turret; the motor needle opening assembly is arranged at a winding station and drives the needle winding mechanism to clamp the material belt; the needle closing assembly is arranged at a blanking station and drives the needle rolling mechanism to loosen the material belt; the outer surface of the needle rolling mechanism is provided with a first adjusting assembly matched with the opening and closing needle adjusting assembly, and the opening and closing needle adjusting assembly is arranged at a blanking station and is matched with the first adjusting assembly to adjust the circumference of the needle rolling mechanism.

In an embodiment of the needle winding mechanism of the present invention, the open/close needle adjusting assembly includes a first driving member disposed on the turret, a first rotating motor connected to the first driving member, and a linear adjusting member disposed at a driving end of the first rotating motor, and the first adjusting assembly includes an adjusting screw rod engaged with the linear adjusting member, and the adjusting screw rod controls a sliding block to slide so as to adjust a circumference of the needle winding mechanism.

In an embodiment of the needle winding mechanism, the needle winding mechanism further comprises a front needle nozzle assembly arranged at the free end, and the front needle nozzle assembly is controlled to abut against the free end of the needle winding mechanism so as to adjust the parallelism of the needle winding mechanism.

In one embodiment of the needle winding mechanism, the motor needle opening assembly comprises a second rotating motor arranged on the turret and an eccentric wheel arranged at the driving end of the second rotating motor.

In one embodiment of the needle winding mechanism of the present invention, the needle closing assembly includes a second driving member disposed on the turret and a third cam coupled to a driving end of the second driving member.

The invention also provides a winding method, which comprises the following steps:

winding the material belt to obtain a finished product battery core;

detecting the deviation trend of the tab;

blanking a finished product battery cell;

and adjusting the circumference of the needle winding mechanism.

In one embodiment of the winding method of the present invention, the step of adjusting the circumference of the needle winding mechanism is provided at the feeding station.

In one embodiment of the winding method of the present invention, the circumference of the needle winding mechanism is adjusted by adjusting the depth of screwing of an adjusting screw in a slider.

In one embodiment of the winding method of the present invention, the free end of the needle winding mechanism is provided with a front needle mouth assembly, and the step of adjusting the circumference of the needle winding mechanism further comprises the step of adjusting the distance between the front needle mouth assembly and the free end of the needle winding mechanism, so as to improve the parallelism of the needle winding mechanism.

In one embodiment of the winding method of the present invention, the component for adjusting the circumference of the needle winding mechanism is an open-close needle adjusting component, and the open-close needle adjusting component is arranged at a blanking station of the turret.

In conclusion, the winding device and the winding method can adjust the circumference of the winding needle mechanism in real time after winding, and improve the winding precision of the battery cell; the step of adjusting the circumference of the winding needle is arranged at the blanking station, the circumference of the winding needle is adjusted by using the spare time of the blanking station, the redundant adjusting time is not increased, the working efficiency is ensured, and the winding precision of the battery cell is improved; according to the winding device, the opening and closing needle adjusting assembly is arranged on the turret and is not arranged on the winding needle, so that the use of a slip ring assembly is avoided, the situations of abrasion and halt replacement of the slip ring assembly are avoided, and the working efficiency is improved.

Drawings

FIG. 1 is a structural view of a winding apparatus of the present invention;

FIG. 2 is a front view of the needle winding mechanism in combination with the open/close needle adjustment assembly;

FIG. 3 is a cross-sectional view of the needle winding mechanism of FIG. 2 taken along section line A-A;

FIG. 4 is a front sectional view of the needle winding mechanism;

FIG. 5 is a block diagram of the front needle tip assembly;

FIG. 6 is a cross-sectional view taken along section line B-B of FIG. 5;

fig. 7 is a flow chart of a cell winding method of the present invention;

fig. 8 is a specific flowchart of step S1 of the cell winding method according to the present invention;

fig. 9 is a specific flowchart of step S3 of the cell winding method according to the present invention.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

As shown in fig. 1 and 2, the winding device of the present embodiment includes a turret 100 rotating around an axis, three stations, namely a winding station 110, a gluing station 120, and a blanking station 130, are uniformly arranged on a circumference of the turret 100 around the axis, and an included angle between each station is 120 degrees. Each station is provided with a winding needle mechanism 200, and when the turret 100 rotates around the axis of the turret, the winding needle mechanisms 200 can be driven to sequentially switch positions among different stations, so that the operations of winding, gluing and blanking of the battery cell are completed. The needle winding mechanism 200 can be driven to extend or retract at different stations, and can rotate around its axis by a rotating shaft (not shown). An open-close needle adjusting assembly 300 is provided at the blanking station 130 for adjusting the circumference of the needle winding mechanism 200 as required. The switching needle adjusting assembly 300 is arranged at the blanking station 130, the circumference of the winding needle mechanism 200 can be adjusted by utilizing the spare time of the blanking station when the winding station 110 and the rubberizing station 120 work, the redundant adjusting time cannot be increased, and the winding precision of the battery cell is improved while the working efficiency is ensured.

As shown in fig. 2 and 3, the needle winding mechanism 200 includes a needle winding base 210 connected to a rotating shaft, a first outer winding needle 220, and a second outer winding needle 230. The first outer winding needle 220 is processed with a first groove 221, and a first inner winding needle 240 is movably disposed in the first groove 221. The second outer winding needle 230 is provided with a second groove 231, and a second inner winding needle 250 is movably arranged in the second groove 231. The needle rolling seat 210 includes a first needle rolling seat 211 and a second needle rolling seat 212, the first outer rolling needle 220 is fixedly connected with the first needle rolling seat 211, the position of the first outer rolling needle 220 is relatively fixed, the second outer rolling needle 230 is movably arranged in the needle rolling seat 210 through a first movable seat 232, and the second outer rolling needle can reciprocate in the radial direction of the needle rolling mechanism 200 through the action of a first adjusting component 260.

The two reel needle seats 210 are fixedly connected and form an accommodating space, and a first movable seat 232 and a second movable seat 251 are arranged in the accommodating space and are respectively connected with the first reel needle seat 211 and the second reel needle seat 212 through a plurality of first guide rods 213 and a plurality of adjusting springs 214. The plurality of first guide bars 213 are disposed along a radial direction of the needle winding mechanism 200, and the plurality of first guide bars 213 and the plurality of adjustment springs 214 enable the first movable block 232 and the second movable block 251 to reciprocate along the first guide bars 213 within the accommodating space. The first movable seat 232 and the second movable seat 251 respectively extend out of the needle winding seat 210 along the radial direction to form an extending end 233. One end of the second outer winding needle 230 is fixedly connected with the first movable seat 232, and one end of the second inner winding needle 250 is fixedly connected with the second movable seat 251. The protruding end 233 simultaneously acting on the first movable seat 232 and the second movable seat 251 can simultaneously drive the second outer winding needle 230 and the second inner winding needle 250 to move in the radial direction.

The second outer winding needle 230 and the first movable seat 232 are provided as two parts, and the second inner winding needle 250 and the second movable seat 251 are provided as two parts in this embodiment, which may be provided as an integral structure in other embodiments as long as they can extend out of the winding needle seat 210 for adjustment.

The first adjusting assembly 260 includes a first annular seat 261 disposed around the needle winding seat 210, a first cam 262 slidably disposed on the first annular seat 261, and an adjusting screw 263 for driving the first cam 262 to slide, wherein the first annular seat 261 is disposed perpendicular to the axial direction of the needle winding mechanism 200. The first cam 262 is provided on a slider 264, the slider 264 is provided on the first annular seat 261 through a slide groove 265, the slide groove 265 is provided at a position of the first annular seat 261 corresponding to the first outer winding needle 220 and is provided in the radial direction of the winding needle mechanism 200 so that the first cam 262 can slide in the radial direction of the winding needle. The first cam 262 is always in contact with the protruding end 233 of the first movable seat 232, and the first outer winding needle 220 is driven by the first movable seat 232 to move along the radial direction. The adjusting screw 263 is fixedly arranged on the first annular seat 261 and is in threaded connection with the slider 264.

The position of first outer winding needle 220 relative to second outer winding needle 230 can be adjusted and maintained radially by adjusting screw 263 to drive first cam 262 to slide along slide slot 265, thereby adjusting and maintaining the circumference of needle winding mechanism 200. The sliding block 264 and the sliding groove 265 are both preferably in a dovetail shape, and the radial movement of the second outer winding needle 230 is driven by the matching of the adjusting screw 263 and the sliding block 264, so that the structure is simple, and the transmission precision is high.

Referring again to fig. 1 and 2, the open/close pin adjusting assembly 300 is disposed at the feeding station 130. The open-close needle adjusting assembly 300 is fixed in position relative to the blanking station 130, and includes a first rotating motor 310 and a first driving member 320 for driving the first rotating motor 310 to approach or separate from the adjusting screw 263, wherein the first driving member 320 is preferably an air cylinder, and has a fast response speed. The driving end of the first rotating electrical machine 310 is provided with a linear adjusting piece 311, and the end of the adjusting screw 263 is provided with a linear groove 2631 which is matched with the linear adjusting piece 311. The first driving member 320 drives the linear adjusting member 311 to extend into the linear groove 2631, and by detecting the deviation trend of the battery cell tab, the first rotating electrical machine 310 rotates to adjust the distance that the extending end 233 of the first movable seat 232 extends out of the winding needle seat 210, and further adjust the distance between the second outer winding needle 230 and the first outer winding needle 220, and adjust the perimeter of the winding needle mechanism 200. The circumference of the needle winding mechanism 200 is adjusted by matching the opening and closing needle adjusting assembly 300 with the first adjusting assembly 260, the opening and closing needle adjusting assembly 300 is arranged outside the needle winding mechanism 200 and is not arranged on the needle winding mechanism 200, the use of a slip ring assembly is avoided, the conditions of abrasion and shutdown replacement of the slip ring assembly cannot exist, and the working efficiency is improved.

When the winding station 110 winds and the rubberizing station 120 rubberizes, the blanking station 130 has spare time after blanking is completed, the spare time is used for adjusting the perimeter of the needle winding mechanism 200, the opening and closing needle adjusting assembly 300 is arranged at the blanking station 130, and the alignment degree of the pole lugs is improved while the working efficiency is guaranteed.

As shown in fig. 4 to 6, in order to ensure the parallelism of the second outer winding needle 230 and improve the winding accuracy, the winding needle mechanism 200 is further provided with a front needle tip assembly 270 that restricts the deformation of the second outer winding needle 230. The front needle tip assembly 270 is disposed on a roll-to-roll front support hub assembly (not shown).

The front needle nozzle assembly 270 includes an inner needle fixing ring 271, an outer needle fixing ring 272, a connecting block 273, and a ball plunger 274. The inner needle fixing ring 271 is fixed to the support base assembly before winding, and has a ring-shaped boss 275 formed at the center thereof for receiving the end of the second inner winding needle 250. The outer needle fixing ring 272 and the inner needle fixing ring 271 are concentrically sleeved on the annular bulge 275 of the inner needle fixing ring, and an annular accommodating space 276 for accommodating the free ends of the first outer winding needle 220 and the second outer winding needle 230 is formed between the annular bulge 275. The free end of the second outer winding needle 230 is processed with an inclined plane, the outer needle fixing ring 272 is processed with an opening 277 at a position corresponding to the free end of the second outer winding needle 230, and the annular boss 275 is processed with an inclined plane contacting the inclined plane of the first outer winding needle 220 at the opening 277; a connecting block 273 is provided at the opening 277 to be fixedly connected to the inner needle fixing ring 271, and a ball plunger 274 is provided on the connecting block 273 and extends into the outer needle fixing ring 272 through the opening 277 to keep the slant surface of the second outer winding needle 230 in contact with the slant surface of the annular projection 275. The distance between the front needle mouth assembly 270 and the first outer winding needle 220 is changed by a driving member externally connected with the connecting block 273, and the axial movement of the second outer winding needle 230 and the inner needle fixing ring 271 is changed into radial movement by the inclined surface of the second outer winding needle 230 and the inclined surface of the annular convex portion 275, so that the distance between the free end of the second outer winding needle 230 and the first outer winding needle 220 is changed. The free end of the second outer winding needle 230 cannot deform under the limitation of the inner needle fixing ring 271 and the ball plunger 274, so that the second outer winding needle 230 and the first outer winding needle 220 are kept parallel, and the alignment degree of the tabs of the wound battery cell is better.

Referring again to fig. 2, the needle winding mechanism 200 further includes a second annular seat 280 fixedly connected to the rotation shaft, the second annular seat 280 is connected to the first annular seat 261 through a plurality of second guide rods 281, the second guide rods 281 are axially disposed along the needle winding mechanism 200, and the first annular seat 261 is movable along the second guide rods 281. The first annular seat 261 is further fixedly provided with a second cam 266, the position of the second cam 266 corresponds to the position of the second outer winding needle 230, the positions of the first cam 262 and the second cam 266 are centrosymmetric about the rotating shaft, and the second cam 266 is always in contact with the extension end 233 of the second movable seat 251. The two extending ends 233 are provided with inclined surfaces, the first annular seat 261 is driven to be close to or far from the second annular seat 280, the first cam 262 and the second cam 266 can be driven to slide along the inclined surfaces of the extending ends, the distance of the two extending ends 233 extending out of the winding needle seat 210 can be changed, the second inner winding needle 250 and the second outer winding needle 230 are driven to be close to or far from the first outer winding needle 220, and the material belt is clamped or released.

In this embodiment, the inclined planes of the two protruding ends 233 extend along the protruding direction of the winding needle and incline towards the winding needle, a first surface 2331 and a second surface 2332 are formed on the protruding ends 233, the first surface 2331 is an inclined plane, the second surface 2332 is a flat plane, and the first surface 2331 or the second surface 2332 is respectively contacted with the first cam 262 and the second cam 266 to adjust the radial movement of the second inner winding needle 250 and the second outer winding needle 230.

The first and second cams 262 and 266 are disposed on the first annular seat 261, and the first annular seat 261 is capable of sliding the first and second cams 262 and 266 on the first and second surfaces 2331 and 2332. When the two protruding ends 233 contact the second surface 2332, the first annular seat 261 and the second annular seat 280 are attached, and since the second surface is a flat surface, the distance that the two protruding ends 233 protrude out of the needle rolling seat 210 is the smallest, and the second inner rolling needle 250 is the closest to the first inner rolling needle 240, so as to clamp the tape; the second outer winding needle 230 is farthest from the first outer winding needle 220, and forms a reference size of the wound battery cell. In order to maintain the reference size of the winding pin for winding the battery cell, and to keep the second inner winding pin 250 in contact with the tape at all times, the first cam 262 and the second cam 266 need to be fixed to the second surface 2332, and therefore, a plurality of magnetic members 282 are provided on the surface of the first annular seat 261 or the second annular seat 280 in contact with each other, so that the battery cell size is prevented from changing when the winding pin mechanism 200 rotates.

Referring to fig. 1 again, the needle threading assembly 400 is disposed at the winding station 110, and the specific structure of the needle threading assembly 400 is not limited as long as the needle winding mechanism 200 can be extended, and those skilled in the art can select the needle threading assembly according to actual requirements, and details are not repeated.

A motor needle opening assembly 500 is also provided at the winding station 110 for bringing the second inner winding needle 250 closer to the first inner winding needle 240 and the second outer winding needle 230 away from the first outer winding needle 220. The motor-driven needle opening assembly 500 is fixed in position relative to the winding station 110 and includes a second rotary motor 510 mounted on the turret 100, with the drive end of the second rotary motor 510 being connected to an eccentric 520. After the tape is inserted into the winding needle mechanism 200, the second rotating motor 510 rotates to drive the eccentric wheel 520 to drive the first annular seat 261 to approach the second annular seat 280, the magnetic member 282 fixes the first annular seat 261 and the second annular seat 280 together, the first cam 262 and the second cam 266 are always in contact with the second surfaces 2332 of the two protruding ends 233, the second inner winding needle 250 and the first inner winding needle 240 clamp the tape, and the second outer winding needle 230 and the first outer winding needle 220 form a reference size for winding the battery cell.

The needle pulling assembly 600 is arranged at the blanking station 130, the specific structure of the needle pulling assembly 600 is not limited as long as the needle rolling mechanism 200 can be retracted, and the skilled person can select the needle pulling assembly according to actual requirements, and details are not repeated.

A needle closing assembly 700 is further arranged at the blanking station 130, and is used for keeping the second inner winding needle 250 away from the first inner winding needle 240 and keeping the second outer winding needle 230 close to the first outer winding needle 220, so that blanking of the battery cell is facilitated. The position of the needle shut-off assembly 700 is fixed relative to the blanking station 130. The obturator instrument 700 includes a secondary drive member 710. the secondary drive member 710 is preferably a pneumatic cylinder and responds quickly. Two third cams 720 are connected to the driving end of the second driver 710. As shown in fig. 2, a plurality of cutouts 283 are distributed in the surface of the second annular seat 280 opposite to the first annular seat 261. When the battery cell is conveyed to the blanking station 130, the second driving member 710 drives the two third cams 720 to extend out, the two third cams 720 extend into the gaps 283 of the second annular seat 280, the needle pulling assembly 600 drives the needle winding mechanism 200 to retract for a certain distance, due to the limitation of the two third cams 720, the first annular seat 261 is separated from the second annular seat 280, and the first annular seat 261 drives the first cam 262 and the second cam 266 to slide to the first surface 2331 of the extending end 233. Since the first surface 2331 is a slope extending in the winding needle extending direction to be inclined toward the winding needle, the distance of the two extending ends 233 extending out of the winding needle holder 210 becomes larger. The second movable seat 251 drives the second inner winding needle 250 to be far away from the first inner winding needle 240, and the material belt is loosened; the first movable seat 232 drives the second outer winding needle 230 to be close to the first outer winding needle 220, the circumference of the winding needle is smaller than the reference size of the winding battery cell, the winding needle mechanism 200 is drawn out from the battery cell and does not bring out a material belt, and the needle drawing effect is good.

As shown in fig. 7, fig. 7 is a flowchart of a method for winding a battery cell by using the winding device, including:

s1, winding the material belt to obtain a finished battery cell;

s2, detecting the deviation trend of the tab;

s3, blanking of finished product battery cores;

and S4, adjusting the circumference of the needle winding mechanism.

As shown in fig. 8, it is a detailed flowchart of step S1.

Specifically, step S1 includes:

s11, extending the needle winding mechanism: at the winding station 110, the needle winding mechanism 200 is extended under the control of the needle threading assembly 400, the material belt passes through the gap of the needle winding mechanism 200, the free end of the second inner winding needle 250 is inserted into the annular convex part 275, and the free ends of the second outer winding needle 230 and the first outer winding needle 220 are inserted into the annular accommodating space 276;

s12, clamping the material belt by the winding needle mechanism: the second rotating motor 510 of the motor needle opening assembly 500 drives the first annular seat 261 to be close to the second annular seat 280 through the eccentric wheel 520, the magnetic member 282 fixes the first annular seat 261 and the second annular seat 280 together, the first cam 262 and the second cam 266 contact the second surfaces 2332 of the two extending ends 233, the distance between the two extending ends 233 extending out of the needle winding seat 210 is shortest, the first movable seat 232 drives the second outer winding needle 230 to be farthest from the first outer winding needle 220 to maintain the reference size of the wound battery cell, and the second movable seat 251 drives the second inner winding needle 250 to be closest to the first inner winding needle 240 to clamp the material belt;

s13, winding the material belt by a winding needle mechanism to form a semi-finished product battery cell: the needle winding mechanism 200 is driven by the rotating shaft to rotate around the axis of the needle winding mechanism to wind the clamped material belt into a semi-finished product battery cell;

s14, forming a finished product battery cell by the residual coil and the adhesive of the coil needle mechanism: after winding, the turret 100 rotates 120 degrees, and the battery cell is shifted to the rubberizing station 120 for residual winding and rubberizing to form a finished battery cell. The operation of the rubberizing station 120 is prior art and will not be described in detail.

As shown in fig. 9, a detailed flowchart of step S3 is shown.

Specifically, step S3 includes:

s31, loosening the material belt by the needle rolling mechanism: at the feeding station 130, the second driving member 710 of the needle closing assembly 700 drives the two third cams 720 to extend out and enter into the gaps 283 of the second annular seat 280, the needle pulling assembly 600 drives the needle winding mechanism 200 to retreat for a certain distance, the two third cams 720 push the first annular seat 261 to separate from the second annular seat 280, the first annular seat 261 drives the first cam 262 and the second cam 266 to contact with the first surface 2331, the distance that the two extending ends 233 extend out of the needle winding seat 210 becomes longer, the second inner winding needle 250 temporarily separates from the first inner winding needle 240 to release the material belt, and the second outer winding needle 230 temporarily approaches the first outer winding needle 220 to reduce the base size of the winding needle;

s32, clamping the finished product battery cell by an external manipulator;

s33, retracting the needle rolling mechanism: the second driving piece 710 drives the two third cams 720 to retract, and the needle winding mechanism 200 retracts under the control of the needle pulling assembly 600 and is pulled out of the battery cell;

and S34, externally connecting a mechanical arm to drive the finished product battery cell to be discharged.

Step S4 specifically includes: the first driving member 320 of the opening and closing needle adjusting assembly 300 drives the first rotating electrical machine 310 to approach the first adjusting assembly 260, the linear adjusting member 311 of the first rotating electrical machine 310 is inserted into the linear groove 2631 of the adjusting screw 263, the controller controls the first rotating electrical machine 310 to rotate to drive the adjusting screw 263 to rotate according to the pole ear offset trend detected before blanking at the blanking station, so as to drive the first cam 262 to slide along the sliding groove 265, control the distance that the extending end 233 of the first movable seat 232 extends out of the needle rolling seat 210, adjust the distance between the second outer rolling needle 230 and the first outer rolling needle 220, and adjust the circumference of the rolling needle of the needle rolling mechanism 200.

Step S4 further includes: by adjusting the free end position of the needle winding mechanism, the front needle nozzle assembly 270 is driven by a driving member to adjust the axial position of the front needle nozzle assembly 270.

Finally, after adjusting the circumference of the winding needle, the turret 100 rotates again by 120 degrees, the winding needle mechanism 200 rotates to the winding station 110, and the winding operation is restarted.

The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.

Claims (10)

1. The winding device is characterized by comprising a turret, wherein three groups of needle winding mechanisms are arranged on the turret and respectively correspond to a winding station, a gluing station and a blanking station, and a motor needle opening assembly, a needle closing assembly and a needle opening and closing adjusting assembly are further arranged on the turret; the motor needle opening assembly is arranged at a winding station and drives the needle winding mechanism to clamp the material belt; the needle closing assembly is arranged at a blanking station and drives the needle rolling mechanism to loosen the material belt; the outer surface of the needle rolling mechanism is provided with a first adjusting assembly matched with the opening and closing needle adjusting assembly, and the opening and closing needle adjusting assembly is arranged at a blanking station and is matched with the first adjusting assembly to adjust the circumference of the needle rolling mechanism.

2. The winding device according to claim 1, wherein the open/close pin adjusting unit comprises a first driving member provided on the turret, a first rotating motor connected to the first driving member, and a linear adjusting member provided at a driving end of the first rotating motor, and the first adjusting unit comprises an adjusting screw engaged with the linear adjusting member, and the adjusting screw controls a sliding of a slider to adjust the circumference of the pin winding mechanism.

3. Winding device according to claim 1, wherein the needle winding mechanism further comprises a front needle mouth assembly arranged at the free end, the front needle mouth assembly is controlled to abut against the free end of the needle winding mechanism so as to adjust the parallelism of the needle winding mechanism.

4. The winding device according to claim 1, wherein the motorized needle opening assembly includes a second rotary motor disposed on the turret and an eccentric disposed at a drive end of the second rotary motor.

5. The winding device of claim 1, wherein the closure assembly includes a second drive member disposed on the turret and a third cam coupled to a drive end of the second drive member.

6. A method of winding a web of material using the winding device of claim 1, the method comprising the steps of:

winding the material belt to obtain a finished product battery core;

detecting the offset trend of the tabs;

blanking a finished product battery cell;

and adjusting the circumference of the needle winding mechanism.

7. The winding method according to claim 6, characterized in that said step of adjusting the circumference of the needle winding mechanism is provided at a feed station.

8. The winding method according to claim 6, wherein the circumference of the needle winding mechanism is controlled by adjusting a screw-in depth of an adjusting screw in a slider.

9. The winding method according to claim 6, wherein the free end of the needle winding mechanism is provided with a front needle nozzle assembly, and the step of adjusting the circumference of the needle winding mechanism further comprises the step of adjusting the distance between the front needle nozzle assembly and the free end of the needle winding mechanism to improve the parallelism of the needle winding mechanism.

10. The winding method according to claim 6, wherein the assembly for adjusting the circumference of the needle winding mechanism is an open-close needle adjusting assembly provided at a blanking station of the turret.

Images