Winding device and winding method

Abstract

The application discloses a winding device and a winding method. The winding mechanism comprises a turret, three groups of winding needle mechanisms are arranged on the turret and correspond to a winding station, a rubberizing station and a discharging station respectively, a motor needle opening assembly, a needle closing assembly and an opening and closing needle adjusting assembly are further arranged on the turret, the motor needle opening assembly is arranged at the winding station and drives the winding needle mechanism to clamp a material belt, the needle closing assembly is arranged at the discharging station and drives the winding needle mechanism to release the material belt, a first adjusting assembly matched with the opening and closing needle adjusting assembly is arranged on the outer surface of the winding needle mechanism, and the opening and closing needle adjusting assembly is arranged at the discharging station and is matched with the first adjusting assembly to adjust the circumference of the winding needle mechanism. The winding device and the winding method can guarantee the working efficiency and improve the winding precision of the battery cell.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of lithium battery automation equipment, and particularly relates to a winding device and a winding method. BACKGROUND

[0002] The production of the battery cell is to wind the positive electrode sheet material belt, the negative electrode sheet material belt and the diaphragm material belt to form a winding body, and the pole lug is a metal conductor for leading out the positive and negative poles from the battery cell. Due to the difference in the pole lug welding or shearing precision, the pole lug of the winding battery cell may be misaligned, thereby affecting the quality of the battery cell, and therefore the winding device needs to be provided with a winding needle mechanism capable of changing the circumference of the winding needle.

[0003] The winding needle mechanism used at present can change the circumference of the winding needle, but most of the structures are relatively complex, and it is inconvenient to adjust the circumference of the winding needle. SUMMARY

[0004] The present application aims to provide a winding device with a simple structure and a winding method for conveniently adjusting the circumference of the winding needle.

[0005] To achieve the above-mentioned purpose, the winding needle mechanism of the present application comprises a turret, three groups of winding needle mechanisms are arranged on the turret, corresponding to the winding station, the rubberizing station and the discharging station respectively, a motor needle opening assembly, a needle closing assembly and an opening and closing needle adjusting assembly are further arranged on the turret; the motor needle opening assembly is arranged at the winding station to drive the winding needle mechanism to clamp the material belt; the needle closing assembly is arranged at the discharging station to drive the winding needle mechanism to release the material belt; a first adjusting assembly is arranged on the outer surface of the winding needle mechanism and matched with the opening and closing needle adjusting assembly, the opening and closing needle adjusting assembly is arranged at the discharging station and matched with the first adjusting assembly to adjust the circumference of the winding needle mechanism.

[0006] In an embodiment of the winding needle mechanism of the present application, the opening and closing needle adjusting assembly comprises a first driving member arranged on the turret, a first rotary motor connected with the first driving member and a one-letter type adjusting member arranged at the driving end of the first rotary motor, and the first adjusting assembly comprises an adjusting screw matched with the one-letter type adjusting member, the circumference of the winding needle mechanism is adjusted by controlling the sliding of a sliding block through the adjusting screw.

[0007] In an embodiment of the winding needle mechanism of the present application, the winding needle 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 winding needle mechanism to adjust the parallelism of the winding needle mechanism.

[0008] In an embodiment of the winding needle mechanism of the present application, the motor needle opening assembly comprises a second rotary motor arranged on the turret and an eccentric wheel arranged at the driving end of the second rotary motor.

[0009] In one embodiment of the winding needle mechanism of the present application, the needle closing assembly comprises a second driving member arranged on the turret and a third cam connected to the driving end of the second driving member.

[0010] The present application also provides a winding method, comprising the following steps:

[0011] Winding the material belt into a finished battery cell;

[0012] Detecting the ear offset trend;

[0013] Discharging the finished battery cell;

[0014] Adjusting the circumference of the winding needle mechanism.

[0015] In one embodiment of the winding method of the present application, the step of adjusting the circumference of the winding needle mechanism is arranged at the discharging station.

[0016] In one embodiment of the winding method of the present application, the adjustment of the circumference of the winding needle mechanism is controlled by adjusting the screwing depth of an adjusting screw in a sliding block.

[0017] In one embodiment of the winding method of the present application, the free end of the winding needle mechanism is provided with a front needle nozzle assembly, and the step of adjusting the circumference of the winding needle mechanism further comprises the step of adjusting the distance between the front needle nozzle assembly and the free end of the winding needle mechanism to improve the parallelism of the winding needle mechanism.

[0018] In one embodiment of the winding method of the present application, the component for adjusting the circumference of the winding needle mechanism is an opening and closing needle adjusting assembly, which is arranged at the discharging station of the turret.

[0019] In summary, the winding device and the winding method of the present application can adjust the circumference of the winding needle mechanism in real time after winding to improve the winding precision of the battery cell. The step of adjusting the circumference of the winding needle mechanism is arranged at the discharging station, which utilizes the idle time of the discharging station to adjust the circumference of the winding needle mechanism without increasing the adjustment time, thereby ensuring the work efficiency while improving the winding precision of the battery cell. The winding device of the present application arranges the opening and closing needle adjusting assembly on the turret instead of on the winding needle, thereby avoiding the use of the slip ring assembly and the wear and replacement of the slip ring assembly, and improving the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural diagram of the winding device of the present application;

[0021] Figure 2 is a front view of the combination of the winding needle mechanism and the opening and closing needle adjusting assembly;

[0022] Figure 3 is Figure 2 is a sectional view of the winding needle mechanism along the sectional line A-A;

[0023] Figure 4 This is a front sectional view of the needle winding mechanism;

[0024] Figure 5 This is a structural diagram of the front needle tip assembly;

[0025] Figure 6 yes Figure 5 A sectional view along section line BB;

[0026] Figure 7 This is a flowchart of the battery cell winding method of the present invention;

[0027] Figure 8 This is a detailed flowchart of step S1 of the battery cell winding method of the present invention;

[0028] Figure 9 This is a detailed flowchart of step S3 of the battery cell winding method of the present invention. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0030] like Figure 1 , Figure 2 As shown, the winding device in this embodiment includes a turret 100 that rotates around an axis. Three stations are evenly arranged on the circumference of the turret 100 around the axis: a winding station 110, an adhesive application station 120, and a blanking station 130. The included angle between each station is 120 degrees. Each station is equipped with a needle winding mechanism 200. When the turret 100 rotates around its axis, it can drive the needle winding mechanism 200 to sequentially switch positions between different stations, thereby completing the winding, adhesive application, and blanking operations of the battery cell. The needle winding mechanism 200 can be driven to extend or retract at different stations and can rotate around its own axis under the drive of a rotating shaft (not shown). A needle opening / closing adjustment assembly 300 is provided at the blanking station 130 to adjust the circumference of the needle winding mechanism 200 as needed. The opening and closing needle adjustment component 300 is set at the unloading station 130. It can adjust the circumference of the winding needle mechanism 200 during the idle time of the unloading station when the winding station 110 and the adhesive application station 120 are working. It will not increase the adjustment time, and improve the winding accuracy of the battery cell while ensuring work efficiency.

[0031] like Figure 2 , Figure 3As shown, the pin tumbler mechanism 200 includes a pin tumbler base 210 connected with the rotation shaft, a first outer pin 220 and a second outer pin 230. The first outer pin 220 is processed with a first groove 221, and a first inner pin 240 is movably arranged in the first groove 221. The second outer pin 230 is processed with a second groove 231, and a second inner pin 250 is movably arranged in the second groove 231. The pin tumbler base 210 includes a first pin tumbler base 211 and a second pin tumbler base 212, the first outer pin 220 is fixedly connected with the first pin tumbler base 211, and the position of the first outer pin 220 is relatively fixed. The second outer pin 230 is movably arranged in the pin tumbler base 210 through a first movable base 232, and can reciprocate in the radial direction of the pin tumbler mechanism 200 through the action of a first adjusting assembly 260.

[0032] The two pin tumbler bases 210 are fixedly connected and form an accommodation space, the first movable base 232 and the second movable base 251 are arranged in the accommodation space, and are connected with the first pin tumbler base 211 and the second pin tumbler base 212 respectively through a plurality of first guide rods 213 and a plurality of adjusting springs 214. The plurality of first guide rods 213 are arranged along the radial direction of the pin tumbler mechanism 200, and the plurality of first guide rods 213 and the plurality of adjusting springs 214 enable the first movable base 232 and the second movable base 251 to reciprocate in the accommodation space along the first guide rods 213. The first movable base 232 and the second movable base 251 respectively extend out of the pin tumbler base 210 in the radial direction and form an extension end 233. One end of the second outer pin 230 is fixedly connected with the first movable base 232, and one end of the second inner pin 250 is fixedly connected with the second movable base 251. The extension ends 233 acting on the first movable base 232 and the second movable base 251 at the same time can simultaneously drive the second outer pin 230 and the second inner pin 250 to move in the radial direction.

[0033] In the embodiment, the second outer pin 230 and the first movable base 232 are arranged as two components, and the second inner pin 250 and the second movable base 251 are arranged as two components. In other embodiments, they can also be arranged as an integral structure, as long as they can extend out of the pin tumbler base 210 for adjustment.

[0034] The first adjusting assembly 260 comprises a first annular seat 261 arranged around the needle seat 210, a first cam 262 slidingly arranged on the first annular seat 261, and an adjusting screw 263 driving the first cam 262 to slide. The first annular seat 261 is arranged perpendicularly to the axial direction of the needle mechanism 200. The first cam 262 is arranged on a sliding block 264 which is arranged on the first annular seat 261 through a sliding groove 265 arranged on the first annular seat 261 at a position corresponding to the first outer needle 220 and arranged along the radial direction of the needle mechanism 200, so that the first cam 262 can slide along the radial direction of the needle. The first cam 262 is always in contact with the protruding end 233 of the first movable seat 232, and drives the first outer needle 220 to move along the radial direction through the first movable seat 232. The adjusting screw 263 is fixedly arranged on the first annular seat 261 and threadedly connected with the sliding block 264.

[0035] By driving the first cam 262 to slide along the sliding groove 265 through the adjusting screw 263, the position of the first outer needle 220 relative to the second outer needle 230 can be adjusted and maintained in the radial direction, so that the circumference of the needle mechanism 200 can be adjusted and maintained. The sliding block 264 and the sliding groove 265 are preferably dovetail-shaped, and the radial movement of the second outer needle 230 is driven by the cooperation of the adjusting screw 263 and the sliding block 264, which has a simple structure and high transmission accuracy.

[0036] Referring again to FIG. 1, Figure 1 , Figure 2 The opening and closing needle adjusting assembly 300 is arranged at the blanking station 130. The position of the opening and closing needle adjusting assembly 300 relative to the blanking station 130 is fixed, and the opening and closing needle adjusting assembly 300 comprises a first rotary motor 310, a first driving member 320 driving the first rotary motor 310 to approach or move away from the adjusting screw 263, and the first driving member 320 is preferably a pneumatic cylinder, which has a fast response speed. The driving end of the first rotary motor 310 is provided with a one-shaped adjusting member 311, and the end of the adjusting screw 263 is provided with a one-shaped groove 2631 matched with the one-shaped adjusting member 311. The first driving member 320 drives the one-shaped adjusting member 311 to extend into the one-shaped groove 2631, and by detecting the trend of the electrode lug deviation of the battery cell, the first rotary motor 310 is rotated to adjust the distance between the protruding end 233 of the first movable seat 232 and the needle seat 210, and then adjust the distance between the second outer needle 230 and the first outer needle 220, and adjust the circumference of the needle mechanism 200. The opening and closing needle adjusting assembly 300 cooperates with the first adjusting assembly 260 to adjust the circumference of the needle mechanism 200. The opening and closing needle adjusting assembly 300 is arranged outside the needle mechanism 200, and is not arranged on the needle mechanism 200, so that the slip ring assembly is not used, and the wear and replacement of the slip ring assembly are avoided, and the working efficiency is improved.

[0037] When the winding station 110 is winding and the rubberizing station 120 is rubberizing, the blanking station 130 has spare time after blanking is completed, and the spare time is used to adjust the circumference of the winding needle mechanism 200. The opening and closing needle adjusting assembly 300 is arranged at the blanking station 130, so as to ensure the working efficiency and improve the alignment of the tab.

[0038] As shown in Figures 4-6 In order to ensure the parallelism of the second outer winding needle 230 and improve the winding precision, the winding needle mechanism 200 is further provided with a front needle nozzle assembly 270 for limiting the deformation of the second outer winding needle 230. The front needle nozzle assembly 270 is arranged on a winding front support seat assembly (not shown in the figure).

[0039] The front needle nozzle assembly 270 comprises an inner needle fixing ring 271, an outer needle fixing ring 272, a connecting block 273 and a ball head plunger 274. The inner needle fixing ring 271 is fixed on the winding front support seat assembly, and a ring-shaped protruding portion 275 accommodating the end portion of the second inner winding needle 250 is formed in the center thereof. The outer needle fixing ring 272 is coaxially sleeved on the ring-shaped protruding portion 275 of the inner needle fixing ring 271, and a ring-shaped accommodating space 276 accommodating the free end of the first outer winding needle 220 and the second outer winding needle 230 is formed between the ring-shaped protruding portion 275 and the outer needle fixing ring 272. The free end portion of the second outer winding needle 230 is machined with an inclined surface, and the position corresponding to the free end portion of the second outer winding needle 230 of the outer needle fixing ring 272 is machined with an opening 277, and the ring-shaped protruding portion 275 is machined with an inclined surface contacting the inclined surface of the first outer winding needle 220 at the opening 277; the connecting block 273 is arranged at the opening 277 and fixedly connected with the inner needle fixing ring 271, and the ball head plunger 274 is arranged on the connecting block 273 and extends into the outer needle fixing ring 272 through the opening 277, so as to keep the inclined surface of the second outer winding needle 230 in contact with the inclined surface of the ring-shaped protruding portion 275. The driving member circumscribed by the connecting block 273 changes the distance between the front needle nozzle assembly 270 and the first outer winding needle 220, and the inclined surface of the second outer winding needle 230 and the inclined surface of the ring-shaped protruding portion 275 convert the axial movement of the second outer winding needle 230 and the inner needle fixing ring 271 into radial movement, so as to change the distance between the free end of the second outer winding needle 230 and the first outer winding needle 220. The free end of the second outer winding needle 230 will not be deformed under the limitation of the inner needle fixing ring 271 and the ball head plunger 274, so as to keep the second outer winding needle 230 parallel to the first outer winding needle 220, and the alignment of the tab of the wound battery cell is better.

[0040] Again referring to Figure 2As shown, the needle mechanism 200 further comprises a second annular seat 280 fixedly connected with the rotation shaft, the second annular seat 280 is connected with the first annular seat 261 through a plurality of second guide rods 281, the second guide rods 281 are arranged along the axial direction of the needle mechanism 200, and the first annular seat 261 can move along the second guide rods 281. A second cam 266 is further fixedly arranged on the first annular seat 261, the second cam 266 is arranged at a position corresponding to the position of the second outer needle 230, the positions of the first cam 262 and the second cam 266 are centrally symmetrical about the rotation shaft, and the second cam 266 is always in contact with the protruding end 233 of the second movable seat 251. The two protruding ends 233 are provided with inclined surfaces, the first annular seat 261 is driven to move close to or away 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 protruding ends, so as to change the distance between the two protruding ends 233 and the first outer needle 220, and further drive the second inner needle 250 and the second outer needle 230 to move close to or away from the first outer needle 220, so as to clamp or release the material belt.

[0041] In the embodiment, the inclined surfaces of the two protruding ends 233 extend along the needle protruding direction and are inclined to the needle, and the protruding end 233 forms a first surface 2331 and a second surface 2332, the first surface 2331 is an inclined surface, and the second surface 2332 is a flat surface, the first surface 2331 or the second surface 2332 is in contact with the first cam 262 or the second cam 266 respectively, so as to adjust the radial movement of the second inner needle 250 and the second outer needle 230.

[0042] The first cam 262 and the second cam 266 are arranged on the first annular seat 261, and the first annular seat 261 can drive the first cam 262 and the second cam 266 to slide on the first surface 2331 and the second surface 2332. When the two protruding ends 233 are in contact with the second surface 2332, the first annular seat 261 and the second annular seat 280 are in close contact, and since the second surface is a flat surface, the distance between the two protruding ends 233 and the needle holder 210 is smallest at this time, the distance between the second inner needle 250 and the first inner needle 240 is closest, and the material belt is clamped; the distance between the second outer needle 230 and the first outer needle 220 is farthest, and the reference size of the winding battery cell is formed. In order to maintain the reference size of the needle winding battery cell and the clamping of the material belt by the second inner needle 250, it is necessary to keep the first cam 262 and the second cam 266 in contact with the second surface 2332 at all times, and the first annular seat 261 and the second annular seat 280 need to be fixed together, so a plurality of magnetic members 282 are arranged on the surfaces of the first annular seat 261 or the second annular seat 280 in contact with each other, so as to prevent the size of the battery cell from changing when the needle mechanism 200 rotates.

[0043] Again referring to Figure 1As shown, the winding station 110 is provided with a needle penetrating assembly 400, the specific structure of the needle penetrating assembly 400 is not limited as long as it can realize the extension of the winding needle mechanism 200, and the person skilled in the art can select according to the actual requirement, and the specific will not be repeated.

[0044] The winding station 110 is also provided with a motor needle opening assembly 500 for moving the second inner winding needle 250 close to the first inner winding needle 240 and moving the second outer winding needle 230 away from the first outer winding needle 220. The motor needle opening assembly 500 is fixed relative to the position of the winding station 110, and includes a second rotating motor 510 arranged on the turret 100, and the driving end of the second rotating motor 510 is connected with an eccentric wheel 520. When the material belt 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 close to 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 surface 2332 of the two extension ends 233, the second inner winding needle 250 clamps the material belt with the first inner winding needle 240, and the second outer winding needle 230 and the first outer winding needle 220 form the reference size of the wound battery cell.

[0045] The discharging station 130 is provided with a needle pulling assembly 600, the specific structure of the needle pulling assembly 600 is not limited as long as it can realize the retreat of the winding needle mechanism 200, and the person skilled in the art can select according to the actual requirement, and the specific will not be repeated.

[0046] The discharging station 130 is also provided with a needle closing assembly 700 for moving the second inner winding needle 250 away from the first inner winding needle 240 and moving the second outer winding needle 230 close to the first outer winding needle 220, so as to facilitate the discharging of the battery cell. The position of the needle closing assembly 700 is fixed relative to the discharging station 130. The needle closing assembly 700 includes a second driving member 710, which is preferably a pneumatic cylinder and has fast response speed. The driving end of the second driving member 710 is connected with two third cams 720. As shown in FIG. 6, when the second driving member 710 is not driven, the third cam 720 is in contact with the second surface 2332 of the extension end 233, and the second outer winding needle 230 is away from the first outer winding needle 220. When the second driving member 710 is driven, the third cam 720 is in contact with the first surface 2331 of the extension end 233, and the second outer winding needle 230 is close to the first outer winding needle 220. Figure 2As shown, the surface of the second annular seat 280 opposite to the first annular seat 261 is provided with a plurality of openings 283. When the battery cell is conveyed to the discharging station 130, the second driving member 710 drives the two third cams 720 to extend into the openings 283 of the second annular seat 280, and the needle pulling assembly 600 drives the needle winding mechanism 200 to retreat a distance, and due to the restriction 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, the slope extends along the direction in which the needle extends to be inclined to the needle, and the distance between the two extending ends 233 extending out of the needle seat 210 becomes larger. The second movable seat 251 drives the second inner needle 250 to move away from the first inner needle 240, and the material belt is loosened; the first movable seat 232 drives the second outer needle 230 to move close to the first outer needle 220, and the circumference of the needle is smaller than the reference size of the wound battery cell, so that the needle winding mechanism 200 can be pulled out of the battery cell without the material belt, and the needle pulling effect is good.

[0047] As Figure 7 shown, Figure 7 the method flow chart for winding the battery cell by using the winding device, comprising:

[0048] S1: winding the material belt into a finished battery cell;

[0049] S2: detecting the ear offset trend;

[0050] S3: discharging the finished battery cell;

[0051] S4: adjusting the circumference of the needle winding mechanism.

[0052] As Figure 8 shown, it is the specific flow chart of step S1.

[0053] Specifically, step S1 comprises:

[0054] S11: needle winding mechanism extension: in the winding station 110, the needle winding mechanism 200 is extended under the control of the needle penetrating assembly 400, the material belt passes through the gap of the needle winding mechanism 200, the free end of the second inner needle 250 is inserted into the annular protruding part 275, and the free end of the second outer needle 230 and the first outer needle 220 is inserted into the annular accommodating space 276;

[0055] S12: The winding needle mechanism clamps the material strip: The second rotary motor 510 of the motor opening assembly 500 drives the first annular seat 261 to approach the second annular seat 280 through the eccentric wheel 520. The magnetic component 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 surface 2332 of the two protruding ends 233. The two protruding ends 233 extend the shortest distance from the winding needle seat 210. The first movable seat 232 drives the second outer winding needle 230 to be furthest from the first outer winding needle 220, maintaining the reference size of the winding cell. The second movable seat 251 drives the second inner winding needle 250 to be closest to the first inner winding needle 240, clamping the material strip.

[0056] S13: The needle winding mechanism winds the strip to form a semi-finished battery cell: The needle winding mechanism 200 rotates around its own axis under the drive of the rotating shaft to wind the clamped strip into a semi-finished battery cell.

[0057] S14: Residual winding and adhesive application to form finished battery cells: After winding, the turret 100 rotates 120 degrees, and the battery cell is moved to the adhesive application station 120 for residual winding and adhesive application to form a finished battery cell. The operation of the adhesive application station 120 is existing technology and will not be described in detail.

[0058] like Figure 9 The diagram shown is a flowchart of step S3.

[0059] Specifically, step S3 includes:

[0060] S31: The needle winding mechanism loosens the material strip: At the unloading station 130, the second drive member 710 of the needle closing assembly 700 drives the two third cams 720 to extend and penetrate into the notch 283 of the second annular seat 280. The needle pulling assembly 600 drives the needle winding mechanism 200 to retract 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 the first surface 2331. The distance between the two extended ends 233 and the needle winding seat 210 increases. The second inner needle winding 250 temporarily moves away from the first inner needle winding 240 to loosen the material strip. The second outer needle winding 230 temporarily moves closer to the first outer needle winding 220 to reduce the reference size of the needle winding.

[0061] S32: An external robotic arm holds the finished battery cell;

[0062] S33: Needle winding mechanism retraction: The second drive unit 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 from the battery cell;

[0063] S34: An external robotic arm drives the unloading of finished battery cells.

[0064] The step S4 specifically comprises: the first driving member 320 of the opening and closing needle adjusting assembly 300 drives the first rotary motor 310 to approach the first adjusting assembly 260, the character-shaped adjusting member 311 of the first rotary motor 310 is inserted into the character-shaped groove 2631 of the adjusting screw 263, the controller controls the first rotary motor 310 to rotate to drive the adjusting screw 263 to rotate, thereby driving the first cam 262 to slide along the sliding groove 265, controlling the extension end 233 of the first movable seat 232 to extend out of the distance of the needle winding seat 210, adjusting the distance between the second outer winding needle 230 and the first outer winding needle 220, and adjusting the winding needle circumference of the winding needle mechanism 200.

[0065] The step S4 further comprises: adjusting the free end position of the winding needle 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.

[0066] Finally, after the winding needle circumference is adjusted, the turret 100 rotates 120 degrees again, the winding needle mechanism 200 rotates to the winding position 110, and the winding work is restarted.

[0067] The above embodiment is only a preferred embodiment for fully illustrating the present application, and the protection scope of the present application is not limited to this. The equivalent replacement or transformation of the technical personnel in the technical field on the basis of the present application is within the protection scope of the present application. The protection scope of the present application is subject to the claims.

Claims

1. A winding device, characterized by The reel turret is provided with three groups of winding needle mechanisms corresponding to the winding station, the rubberizing station and the discharging station respectively, and is further provided with a motor needle opening assembly, a needle closing assembly and an opening and closing needle adjusting assembly; the motor needle opening assembly is arranged at the winding station to drive the winding needle mechanism to clamp the material belt; the needle closing assembly is arranged at the discharging station to drive the winding needle mechanism to release the material belt; the outer surface of the winding needle 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 outside the winding needle mechanism and fixed relative to the position of the discharging station; The opening and closing needle adjusting assembly is arranged outside the winding needle mechanism and fixed relative to the position of the discharging station; The winding needle mechanism comprises a winding needle base connected with a rotating shaft, a first outer winding needle and a second outer winding needle, the second outer winding needle is movably arranged in the winding needle base through a first movable seat, and the first movable seat extends out of the winding needle base to form an extension end in the radial direction; The first adjusting assembly comprises a first annular seat arranged around the winding needle base, a first cam slidingly arranged on the first annular seat and an adjusting screw driving the first cam to slide, the first cam is arranged on a sliding block, the sliding block is arranged on the first annular seat through a sliding groove, the sliding groove is arranged at a position of the first annular seat corresponding to the first outer winding needle and arranged in the radial direction of the winding needle mechanism, and the first cam is always in contact with the extension end of the first movable seat; The opening and closing needle adjusting assembly comprises a first rotating motor, a first driving member driving the first rotating motor to approach or move away from the adjusting screw, and a T-shaped adjusting member arranged at the driving end of the first rotating motor, the T-shaped adjusting member is matched with the adjusting screw to control the sliding of the sliding block in the radial direction and further adjust the circumference of the winding needle mechanism.

2. The winding device according to claim 1, characterized in that The winding needle 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 winding needle mechanism to adjust the parallelism of the winding needle mechanism.

3. The winding device according to claim 1, wherein The motor needle opening assembly comprises a second rotating motor arranged on the reel turret and an eccentric wheel arranged at the driving end of the second rotating motor.

4. The winding device according to claim 1, wherein The needle closing assembly comprises a second driving member arranged on the reel turret and a third cam connected with the driving end of the second driving member.

5. A winding method of winding a material tape by using the winding apparatus according to claim 1, characterized by, The method comprises the following steps: Winding the material belt into a finished product battery cell; Detecting the ear offset trend; Discharging the finished product battery cell; Adjusting the circumference of the winding needle mechanism; The adjusting assembly of the circumference of the winding needle mechanism is the opening and closing needle adjusting assembly, the opening and closing needle adjusting assembly is arranged at the discharging station of the reel turret and matched with the first adjusting assembly to adjust the circumference of the winding needle mechanism in the radial direction; the opening and closing needle adjusting assembly is arranged outside the winding needle mechanism and fixed relative to the position of the discharging station; The winding needle mechanism comprises a winding needle base connected with a rotating shaft, a first outer winding needle and a second outer winding needle, the second outer winding needle is movably arranged in the winding needle base through a first movable seat, and the first movable seat extends out of the winding needle base to form an extension end in the radial direction; The first adjusting assembly comprises a first annular seat arranged around the needle holder, a first cam slidingly arranged on the first annular seat, and an adjusting screw driving the first cam to slide, the first cam is arranged on a sliding block, the sliding block is arranged on the first annular seat through a sliding groove, the sliding groove is arranged at a position corresponding to the first outer needle on the first annular seat and is arranged along the radial direction of the needle mechanism, and the first cam is always in contact with the extending end of the first movable seat; The opening and closing needle adjusting assembly comprises a first rotary motor and a first driving member driving the first rotary motor to be close to or away from the adjusting screw, the driving end of the first rotary motor is provided with a one-character type adjusting member, the one-character type adjusting member is matched with the adjusting screw in the radial direction to control the sliding of the sliding block and further adjust the circumference of the needle mechanism.

6. The winding method according to claim 5, wherein The step of adjusting the circumference of the needle mechanism is arranged at the blanking station.

7. The winding method according to claim 5, wherein The circumference of the needle mechanism is controlled by adjusting the screwing depth of an adjusting screw in a sliding block.

8. The winding method according to claim 5, wherein The free end of the needle mechanism is provided with a front needle nozzle assembly, and the step of adjusting the distance between the front needle nozzle assembly and the free end of the needle mechanism is further included to improve the parallelism of the needle mechanism. The circumference of the needle mechanism is controlled by adjusting the screwing depth of an adjusting screw in a sliding block. The free end of the needle mechanism is provided with a front needle nozzle assembly, and the step of adjusting the distance between the front needle nozzle assembly and the free end of the needle mechanism is further included to improve the parallelism of the needle mechanism.

Images